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Staging: hv: blk dev depends on SCSI
[linux/fpc-iii.git] / sound / core / pcm_native.c
blob59e5fbe6af51eeb2edf002adff4761ea07387ba7
1 /*
2 * Digital Audio (PCM) abstract layer
3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
22 #include <linux/mm.h>
23 #include <linux/file.h>
24 #include <linux/slab.h>
25 #include <linux/smp_lock.h>
26 #include <linux/time.h>
27 #include <linux/pm_qos_params.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 memset(info, 0, sizeof(*info));
99 info->card = pcm->card->number;
100 info->device = pcm->device;
101 info->stream = substream->stream;
102 info->subdevice = substream->number;
103 strlcpy(info->id, pcm->id, sizeof(info->id));
104 strlcpy(info->name, pcm->name, sizeof(info->name));
105 info->dev_class = pcm->dev_class;
106 info->dev_subclass = pcm->dev_subclass;
107 info->subdevices_count = pstr->substream_count;
108 info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
109 strlcpy(info->subname, substream->name, sizeof(info->subname));
110 runtime = substream->runtime;
111 /* AB: FIXME!!! This is definitely nonsense */
112 if (runtime) {
113 info->sync = runtime->sync;
114 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
115 }
116 return 0;
117 }
118
119 int snd_pcm_info_user(struct snd_pcm_substream *substream,
120 struct snd_pcm_info __user * _info)
121 {
122 struct snd_pcm_info *info;
123 int err;
124
125 info = kmalloc(sizeof(*info), GFP_KERNEL);
126 if (! info)
127 return -ENOMEM;
128 err = snd_pcm_info(substream, info);
129 if (err >= 0) {
130 if (copy_to_user(_info, info, sizeof(*info)))
131 err = -EFAULT;
132 }
133 kfree(info);
134 return err;
135 }
136
137 #undef RULES_DEBUG
138
139 #ifdef RULES_DEBUG
140 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
141 char *snd_pcm_hw_param_names[] = {
142 HW_PARAM(ACCESS),
143 HW_PARAM(FORMAT),
144 HW_PARAM(SUBFORMAT),
145 HW_PARAM(SAMPLE_BITS),
146 HW_PARAM(FRAME_BITS),
147 HW_PARAM(CHANNELS),
148 HW_PARAM(RATE),
149 HW_PARAM(PERIOD_TIME),
150 HW_PARAM(PERIOD_SIZE),
151 HW_PARAM(PERIOD_BYTES),
152 HW_PARAM(PERIODS),
153 HW_PARAM(BUFFER_TIME),
154 HW_PARAM(BUFFER_SIZE),
155 HW_PARAM(BUFFER_BYTES),
156 HW_PARAM(TICK_TIME),
157 };
158 #endif
159
160 int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
161 struct snd_pcm_hw_params *params)
162 {
163 unsigned int k;
164 struct snd_pcm_hardware *hw;
165 struct snd_interval *i = NULL;
166 struct snd_mask *m = NULL;
167 struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
168 unsigned int rstamps[constrs->rules_num];
169 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
170 unsigned int stamp = 2;
171 int changed, again;
172
173 params->info = 0;
174 params->fifo_size = 0;
175 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
176 params->msbits = 0;
177 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
178 params->rate_num = 0;
179 params->rate_den = 0;
180 }
181
182 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
183 m = hw_param_mask(params, k);
184 if (snd_mask_empty(m))
185 return -EINVAL;
186 if (!(params->rmask & (1 << k)))
187 continue;
188 #ifdef RULES_DEBUG
189 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
190 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
191 #endif
192 changed = snd_mask_refine(m, constrs_mask(constrs, k));
193 #ifdef RULES_DEBUG
194 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
195 #endif
196 if (changed)
197 params->cmask |= 1 << k;
198 if (changed < 0)
199 return changed;
200 }
201
202 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
203 i = hw_param_interval(params, k);
204 if (snd_interval_empty(i))
205 return -EINVAL;
206 if (!(params->rmask & (1 << k)))
207 continue;
208 #ifdef RULES_DEBUG
209 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
210 if (i->empty)
211 printk("empty");
212 else
213 printk("%c%u %u%c",
214 i->openmin ? '(' : '[', i->min,
215 i->max, i->openmax ? ')' : ']');
216 printk(" -> ");
217 #endif
218 changed = snd_interval_refine(i, constrs_interval(constrs, k));
219 #ifdef RULES_DEBUG
220 if (i->empty)
221 printk("empty\n");
222 else
223 printk("%c%u %u%c\n",
224 i->openmin ? '(' : '[', i->min,
225 i->max, i->openmax ? ')' : ']');
226 #endif
227 if (changed)
228 params->cmask |= 1 << k;
229 if (changed < 0)
230 return changed;
231 }
232
233 for (k = 0; k < constrs->rules_num; k++)
234 rstamps[k] = 0;
235 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
236 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
237 do {
238 again = 0;
239 for (k = 0; k < constrs->rules_num; k++) {
240 struct snd_pcm_hw_rule *r = &constrs->rules[k];
241 unsigned int d;
242 int doit = 0;
243 if (r->cond && !(r->cond & params->flags))
244 continue;
245 for (d = 0; r->deps[d] >= 0; d++) {
246 if (vstamps[r->deps[d]] > rstamps[k]) {
247 doit = 1;
248 break;
249 }
250 }
251 if (!doit)
252 continue;
253 #ifdef RULES_DEBUG
254 printk(KERN_DEBUG "Rule %d [%p]: ", k, r->func);
255 if (r->var >= 0) {
256 printk("%s = ", snd_pcm_hw_param_names[r->var]);
257 if (hw_is_mask(r->var)) {
258 m = hw_param_mask(params, r->var);
259 printk("%x", *m->bits);
260 } else {
261 i = hw_param_interval(params, r->var);
262 if (i->empty)
263 printk("empty");
264 else
265 printk("%c%u %u%c",
266 i->openmin ? '(' : '[', i->min,
267 i->max, i->openmax ? ')' : ']');
268 }
269 }
270 #endif
271 changed = r->func(params, r);
272 #ifdef RULES_DEBUG
273 if (r->var >= 0) {
274 printk(" -> ");
275 if (hw_is_mask(r->var))
276 printk("%x", *m->bits);
277 else {
278 if (i->empty)
279 printk("empty");
280 else
281 printk("%c%u %u%c",
282 i->openmin ? '(' : '[', i->min,
283 i->max, i->openmax ? ')' : ']');
284 }
285 }
286 printk("\n");
287 #endif
288 rstamps[k] = stamp;
289 if (changed && r->var >= 0) {
290 params->cmask |= (1 << r->var);
291 vstamps[r->var] = stamp;
292 again = 1;
293 }
294 if (changed < 0)
295 return changed;
296 stamp++;
297 }
298 } while (again);
299 if (!params->msbits) {
300 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
301 if (snd_interval_single(i))
302 params->msbits = snd_interval_value(i);
303 }
304
305 if (!params->rate_den) {
306 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
307 if (snd_interval_single(i)) {
308 params->rate_num = snd_interval_value(i);
309 params->rate_den = 1;
310 }
311 }
312
313 hw = &substream->runtime->hw;
314 if (!params->info)
315 params->info = hw->info & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES;
316 if (!params->fifo_size) {
317 if (snd_mask_min(&params->masks[SNDRV_PCM_HW_PARAM_FORMAT]) ==
318 snd_mask_max(&params->masks[SNDRV_PCM_HW_PARAM_FORMAT]) &&
319 snd_mask_min(&params->masks[SNDRV_PCM_HW_PARAM_CHANNELS]) ==
320 snd_mask_max(&params->masks[SNDRV_PCM_HW_PARAM_CHANNELS])) {
321 changed = substream->ops->ioctl(substream,
322 SNDRV_PCM_IOCTL1_FIFO_SIZE, params);
323 if (changed < 0)
324 return changed;
325 }
326 }
327 params->rmask = 0;
328 return 0;
329 }
330
331 EXPORT_SYMBOL(snd_pcm_hw_refine);
332
333 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
334 struct snd_pcm_hw_params __user * _params)
335 {
336 struct snd_pcm_hw_params *params;
337 int err;
338
339 params = memdup_user(_params, sizeof(*params));
340 if (IS_ERR(params))
341 return PTR_ERR(params);
342
343 err = snd_pcm_hw_refine(substream, params);
344 if (copy_to_user(_params, params, sizeof(*params))) {
345 if (!err)
346 err = -EFAULT;
347 }
348
349 kfree(params);
350 return err;
351 }
352
353 static int period_to_usecs(struct snd_pcm_runtime *runtime)
354 {
355 int usecs;
356
357 if (! runtime->rate)
358 return -1; /* invalid */
359
360 /* take 75% of period time as the deadline */
361 usecs = (750000 / runtime->rate) * runtime->period_size;
362 usecs += ((750000 % runtime->rate) * runtime->period_size) /
363 runtime->rate;
364
365 return usecs;
366 }
367
368 static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
369 struct snd_pcm_hw_params *params)
370 {
371 struct snd_pcm_runtime *runtime;
372 int err, usecs;
373 unsigned int bits;
374 snd_pcm_uframes_t frames;
375
376 if (PCM_RUNTIME_CHECK(substream))
377 return -ENXIO;
378 runtime = substream->runtime;
379 snd_pcm_stream_lock_irq(substream);
380 switch (runtime->status->state) {
381 case SNDRV_PCM_STATE_OPEN:
382 case SNDRV_PCM_STATE_SETUP:
383 case SNDRV_PCM_STATE_PREPARED:
384 break;
385 default:
386 snd_pcm_stream_unlock_irq(substream);
387 return -EBADFD;
388 }
389 snd_pcm_stream_unlock_irq(substream);
390 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
391 if (!substream->oss.oss)
392 #endif
393 if (atomic_read(&substream->mmap_count))
394 return -EBADFD;
395
396 params->rmask = ~0U;
397 err = snd_pcm_hw_refine(substream, params);
398 if (err < 0)
399 goto _error;
400
401 err = snd_pcm_hw_params_choose(substream, params);
402 if (err < 0)
403 goto _error;
404
405 if (substream->ops->hw_params != NULL) {
406 err = substream->ops->hw_params(substream, params);
407 if (err < 0)
408 goto _error;
409 }
410
411 runtime->access = params_access(params);
412 runtime->format = params_format(params);
413 runtime->subformat = params_subformat(params);
414 runtime->channels = params_channels(params);
415 runtime->rate = params_rate(params);
416 runtime->period_size = params_period_size(params);
417 runtime->periods = params_periods(params);
418 runtime->buffer_size = params_buffer_size(params);
419 runtime->info = params->info;
420 runtime->rate_num = params->rate_num;
421 runtime->rate_den = params->rate_den;
422
423 bits = snd_pcm_format_physical_width(runtime->format);
424 runtime->sample_bits = bits;
425 bits *= runtime->channels;
426 runtime->frame_bits = bits;
427 frames = 1;
428 while (bits % 8 != 0) {
429 bits *= 2;
430 frames *= 2;
431 }
432 runtime->byte_align = bits / 8;
433 runtime->min_align = frames;
434
435 /* Default sw params */
436 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
437 runtime->period_step = 1;
438 runtime->control->avail_min = runtime->period_size;
439 runtime->start_threshold = 1;
440 runtime->stop_threshold = runtime->buffer_size;
441 runtime->silence_threshold = 0;
442 runtime->silence_size = 0;
443 runtime->boundary = runtime->buffer_size;
444 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
445 runtime->boundary *= 2;
446
447 snd_pcm_timer_resolution_change(substream);
448 runtime->status->state = SNDRV_PCM_STATE_SETUP;
449
450 pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY,
451 substream->latency_id);
452 if ((usecs = period_to_usecs(runtime)) >= 0)
453 pm_qos_add_requirement(PM_QOS_CPU_DMA_LATENCY,
454 substream->latency_id, usecs);
455 return 0;
456 _error:
457 /* hardware might be unuseable from this time,
458 so we force application to retry to set
459 the correct hardware parameter settings */
460 runtime->status->state = SNDRV_PCM_STATE_OPEN;
461 if (substream->ops->hw_free != NULL)
462 substream->ops->hw_free(substream);
463 return err;
464 }
465
466 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
467 struct snd_pcm_hw_params __user * _params)
468 {
469 struct snd_pcm_hw_params *params;
470 int err;
471
472 params = memdup_user(_params, sizeof(*params));
473 if (IS_ERR(params))
474 return PTR_ERR(params);
475
476 err = snd_pcm_hw_params(substream, params);
477 if (copy_to_user(_params, params, sizeof(*params))) {
478 if (!err)
479 err = -EFAULT;
480 }
481
482 kfree(params);
483 return err;
484 }
485
486 static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
487 {
488 struct snd_pcm_runtime *runtime;
489 int result = 0;
490
491 if (PCM_RUNTIME_CHECK(substream))
492 return -ENXIO;
493 runtime = substream->runtime;
494 snd_pcm_stream_lock_irq(substream);
495 switch (runtime->status->state) {
496 case SNDRV_PCM_STATE_SETUP:
497 case SNDRV_PCM_STATE_PREPARED:
498 break;
499 default:
500 snd_pcm_stream_unlock_irq(substream);
501 return -EBADFD;
502 }
503 snd_pcm_stream_unlock_irq(substream);
504 if (atomic_read(&substream->mmap_count))
505 return -EBADFD;
506 if (substream->ops->hw_free)
507 result = substream->ops->hw_free(substream);
508 runtime->status->state = SNDRV_PCM_STATE_OPEN;
509 pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY,
510 substream->latency_id);
511 return result;
512 }
513
514 static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
515 struct snd_pcm_sw_params *params)
516 {
517 struct snd_pcm_runtime *runtime;
518
519 if (PCM_RUNTIME_CHECK(substream))
520 return -ENXIO;
521 runtime = substream->runtime;
522 snd_pcm_stream_lock_irq(substream);
523 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
524 snd_pcm_stream_unlock_irq(substream);
525 return -EBADFD;
526 }
527 snd_pcm_stream_unlock_irq(substream);
528
529 if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
530 return -EINVAL;
531 if (params->avail_min == 0)
532 return -EINVAL;
533 if (params->silence_size >= runtime->boundary) {
534 if (params->silence_threshold != 0)
535 return -EINVAL;
536 } else {
537 if (params->silence_size > params->silence_threshold)
538 return -EINVAL;
539 if (params->silence_threshold > runtime->buffer_size)
540 return -EINVAL;
541 }
542 snd_pcm_stream_lock_irq(substream);
543 runtime->tstamp_mode = params->tstamp_mode;
544 runtime->period_step = params->period_step;
545 runtime->control->avail_min = params->avail_min;
546 runtime->start_threshold = params->start_threshold;
547 runtime->stop_threshold = params->stop_threshold;
548 runtime->silence_threshold = params->silence_threshold;
549 runtime->silence_size = params->silence_size;
550 params->boundary = runtime->boundary;
551 if (snd_pcm_running(substream)) {
552 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
553 runtime->silence_size > 0)
554 snd_pcm_playback_silence(substream, ULONG_MAX);
555 wake_up(&runtime->sleep);
556 }
557 snd_pcm_stream_unlock_irq(substream);
558 return 0;
559 }
560
561 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
562 struct snd_pcm_sw_params __user * _params)
563 {
564 struct snd_pcm_sw_params params;
565 int err;
566 if (copy_from_user(&params, _params, sizeof(params)))
567 return -EFAULT;
568 err = snd_pcm_sw_params(substream, &params);
569 if (copy_to_user(_params, &params, sizeof(params)))
570 return -EFAULT;
571 return err;
572 }
573
574 int snd_pcm_status(struct snd_pcm_substream *substream,
575 struct snd_pcm_status *status)
576 {
577 struct snd_pcm_runtime *runtime = substream->runtime;
578
579 snd_pcm_stream_lock_irq(substream);
580 status->state = runtime->status->state;
581 status->suspended_state = runtime->status->suspended_state;
582 if (status->state == SNDRV_PCM_STATE_OPEN)
583 goto _end;
584 status->trigger_tstamp = runtime->trigger_tstamp;
585 if (snd_pcm_running(substream)) {
586 snd_pcm_update_hw_ptr(substream);
587 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
588 status->tstamp = runtime->status->tstamp;
589 goto _tstamp_end;
590 }
591 }
592 snd_pcm_gettime(runtime, &status->tstamp);
593 _tstamp_end:
594 status->appl_ptr = runtime->control->appl_ptr;
595 status->hw_ptr = runtime->status->hw_ptr;
596 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
597 status->avail = snd_pcm_playback_avail(runtime);
598 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
599 runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
600 status->delay = runtime->buffer_size - status->avail;
601 status->delay += runtime->delay;
602 } else
603 status->delay = 0;
604 } else {
605 status->avail = snd_pcm_capture_avail(runtime);
606 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
607 status->delay = status->avail + runtime->delay;
608 else
609 status->delay = 0;
610 }
611 status->avail_max = runtime->avail_max;
612 status->overrange = runtime->overrange;
613 runtime->avail_max = 0;
614 runtime->overrange = 0;
615 _end:
616 snd_pcm_stream_unlock_irq(substream);
617 return 0;
618 }
619
620 static int snd_pcm_status_user(struct snd_pcm_substream *substream,
621 struct snd_pcm_status __user * _status)
622 {
623 struct snd_pcm_status status;
624 int res;
625
626 memset(&status, 0, sizeof(status));
627 res = snd_pcm_status(substream, &status);
628 if (res < 0)
629 return res;
630 if (copy_to_user(_status, &status, sizeof(status)))
631 return -EFAULT;
632 return 0;
633 }
634
635 static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
636 struct snd_pcm_channel_info * info)
637 {
638 struct snd_pcm_runtime *runtime;
639 unsigned int channel;
640
641 channel = info->channel;
642 runtime = substream->runtime;
643 snd_pcm_stream_lock_irq(substream);
644 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
645 snd_pcm_stream_unlock_irq(substream);
646 return -EBADFD;
647 }
648 snd_pcm_stream_unlock_irq(substream);
649 if (channel >= runtime->channels)
650 return -EINVAL;
651 memset(info, 0, sizeof(*info));
652 info->channel = channel;
653 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
654 }
655
656 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
657 struct snd_pcm_channel_info __user * _info)
658 {
659 struct snd_pcm_channel_info info;
660 int res;
661
662 if (copy_from_user(&info, _info, sizeof(info)))
663 return -EFAULT;
664 res = snd_pcm_channel_info(substream, &info);
665 if (res < 0)
666 return res;
667 if (copy_to_user(_info, &info, sizeof(info)))
668 return -EFAULT;
669 return 0;
670 }
671
672 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
673 {
674 struct snd_pcm_runtime *runtime = substream->runtime;
675 if (runtime->trigger_master == NULL)
676 return;
677 if (runtime->trigger_master == substream) {
678 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
679 } else {
680 snd_pcm_trigger_tstamp(runtime->trigger_master);
681 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
682 }
683 runtime->trigger_master = NULL;
684 }
685
686 struct action_ops {
687 int (*pre_action)(struct snd_pcm_substream *substream, int state);
688 int (*do_action)(struct snd_pcm_substream *substream, int state);
689 void (*undo_action)(struct snd_pcm_substream *substream, int state);
690 void (*post_action)(struct snd_pcm_substream *substream, int state);
691 };
692
693 /*
694 * this functions is core for handling of linked stream
695 * Note: the stream state might be changed also on failure
696 * Note2: call with calling stream lock + link lock
697 */
698 static int snd_pcm_action_group(struct action_ops *ops,
699 struct snd_pcm_substream *substream,
700 int state, int do_lock)
701 {
702 struct snd_pcm_substream *s = NULL;
703 struct snd_pcm_substream *s1;
704 int res = 0;
705
706 snd_pcm_group_for_each_entry(s, substream) {
707 if (do_lock && s != substream)
708 spin_lock_nested(&s->self_group.lock,
709 SINGLE_DEPTH_NESTING);
710 res = ops->pre_action(s, state);
711 if (res < 0)
712 goto _unlock;
713 }
714 snd_pcm_group_for_each_entry(s, substream) {
715 res = ops->do_action(s, state);
716 if (res < 0) {
717 if (ops->undo_action) {
718 snd_pcm_group_for_each_entry(s1, substream) {
719 if (s1 == s) /* failed stream */
720 break;
721 ops->undo_action(s1, state);
722 }
723 }
724 s = NULL; /* unlock all */
725 goto _unlock;
726 }
727 }
728 snd_pcm_group_for_each_entry(s, substream) {
729 ops->post_action(s, state);
730 }
731 _unlock:
732 if (do_lock) {
733 /* unlock streams */
734 snd_pcm_group_for_each_entry(s1, substream) {
735 if (s1 != substream)
736 spin_unlock(&s1->self_group.lock);
737 if (s1 == s) /* end */
738 break;
739 }
740 }
741 return res;
742 }
743
744 /*
745 * Note: call with stream lock
746 */
747 static int snd_pcm_action_single(struct action_ops *ops,
748 struct snd_pcm_substream *substream,
749 int state)
750 {
751 int res;
752
753 res = ops->pre_action(substream, state);
754 if (res < 0)
755 return res;
756 res = ops->do_action(substream, state);
757 if (res == 0)
758 ops->post_action(substream, state);
759 else if (ops->undo_action)
760 ops->undo_action(substream, state);
761 return res;
762 }
763
764 /*
765 * Note: call with stream lock
766 */
767 static int snd_pcm_action(struct action_ops *ops,
768 struct snd_pcm_substream *substream,
769 int state)
770 {
771 int res;
772
773 if (snd_pcm_stream_linked(substream)) {
774 if (!spin_trylock(&substream->group->lock)) {
775 spin_unlock(&substream->self_group.lock);
776 spin_lock(&substream->group->lock);
777 spin_lock(&substream->self_group.lock);
778 }
779 res = snd_pcm_action_group(ops, substream, state, 1);
780 spin_unlock(&substream->group->lock);
781 } else {
782 res = snd_pcm_action_single(ops, substream, state);
783 }
784 return res;
785 }
786
787 /*
788 * Note: don't use any locks before
789 */
790 static int snd_pcm_action_lock_irq(struct action_ops *ops,
791 struct snd_pcm_substream *substream,
792 int state)
793 {
794 int res;
795
796 read_lock_irq(&snd_pcm_link_rwlock);
797 if (snd_pcm_stream_linked(substream)) {
798 spin_lock(&substream->group->lock);
799 spin_lock(&substream->self_group.lock);
800 res = snd_pcm_action_group(ops, substream, state, 1);
801 spin_unlock(&substream->self_group.lock);
802 spin_unlock(&substream->group->lock);
803 } else {
804 spin_lock(&substream->self_group.lock);
805 res = snd_pcm_action_single(ops, substream, state);
806 spin_unlock(&substream->self_group.lock);
807 }
808 read_unlock_irq(&snd_pcm_link_rwlock);
809 return res;
810 }
811
812 /*
813 */
814 static int snd_pcm_action_nonatomic(struct action_ops *ops,
815 struct snd_pcm_substream *substream,
816 int state)
817 {
818 int res;
819
820 down_read(&snd_pcm_link_rwsem);
821 if (snd_pcm_stream_linked(substream))
822 res = snd_pcm_action_group(ops, substream, state, 0);
823 else
824 res = snd_pcm_action_single(ops, substream, state);
825 up_read(&snd_pcm_link_rwsem);
826 return res;
827 }
828
829 /*
830 * start callbacks
831 */
832 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
833 {
834 struct snd_pcm_runtime *runtime = substream->runtime;
835 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
836 return -EBADFD;
837 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
838 !snd_pcm_playback_data(substream))
839 return -EPIPE;
840 runtime->trigger_master = substream;
841 return 0;
842 }
843
844 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
845 {
846 if (substream->runtime->trigger_master != substream)
847 return 0;
848 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
849 }
850
851 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
852 {
853 if (substream->runtime->trigger_master == substream)
854 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
855 }
856
857 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
858 {
859 struct snd_pcm_runtime *runtime = substream->runtime;
860 snd_pcm_trigger_tstamp(substream);
861 runtime->hw_ptr_jiffies = jiffies;
862 runtime->status->state = state;
863 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
864 runtime->silence_size > 0)
865 snd_pcm_playback_silence(substream, ULONG_MAX);
866 if (substream->timer)
867 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
868 &runtime->trigger_tstamp);
869 }
870
871 static struct action_ops snd_pcm_action_start = {
872 .pre_action = snd_pcm_pre_start,
873 .do_action = snd_pcm_do_start,
874 .undo_action = snd_pcm_undo_start,
875 .post_action = snd_pcm_post_start
876 };
877
878 /**
879 * snd_pcm_start - start all linked streams
880 * @substream: the PCM substream instance
881 */
882 int snd_pcm_start(struct snd_pcm_substream *substream)
883 {
884 return snd_pcm_action(&snd_pcm_action_start, substream,
885 SNDRV_PCM_STATE_RUNNING);
886 }
887
888 /*
889 * stop callbacks
890 */
891 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
892 {
893 struct snd_pcm_runtime *runtime = substream->runtime;
894 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
895 return -EBADFD;
896 runtime->trigger_master = substream;
897 return 0;
898 }
899
900 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
901 {
902 if (substream->runtime->trigger_master == substream &&
903 snd_pcm_running(substream))
904 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
905 return 0; /* unconditonally stop all substreams */
906 }
907
908 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
909 {
910 struct snd_pcm_runtime *runtime = substream->runtime;
911 if (runtime->status->state != state) {
912 snd_pcm_trigger_tstamp(substream);
913 if (substream->timer)
914 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
915 &runtime->trigger_tstamp);
916 runtime->status->state = state;
917 }
918 wake_up(&runtime->sleep);
919 }
920
921 static struct action_ops snd_pcm_action_stop = {
922 .pre_action = snd_pcm_pre_stop,
923 .do_action = snd_pcm_do_stop,
924 .post_action = snd_pcm_post_stop
925 };
926
927 /**
928 * snd_pcm_stop - try to stop all running streams in the substream group
929 * @substream: the PCM substream instance
930 * @state: PCM state after stopping the stream
931 *
932 * The state of each stream is then changed to the given state unconditionally.
933 */
934 int snd_pcm_stop(struct snd_pcm_substream *substream, int state)
935 {
936 return snd_pcm_action(&snd_pcm_action_stop, substream, state);
937 }
938
939 EXPORT_SYMBOL(snd_pcm_stop);
940
941 /**
942 * snd_pcm_drain_done - stop the DMA only when the given stream is playback
943 * @substream: the PCM substream
944 *
945 * After stopping, the state is changed to SETUP.
946 * Unlike snd_pcm_stop(), this affects only the given stream.
947 */
948 int snd_pcm_drain_done(struct snd_pcm_substream *substream)
949 {
950 return snd_pcm_action_single(&snd_pcm_action_stop, substream,
951 SNDRV_PCM_STATE_SETUP);
952 }
953
954 /*
955 * pause callbacks
956 */
957 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
958 {
959 struct snd_pcm_runtime *runtime = substream->runtime;
960 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
961 return -ENOSYS;
962 if (push) {
963 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
964 return -EBADFD;
965 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
966 return -EBADFD;
967 runtime->trigger_master = substream;
968 return 0;
969 }
970
971 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
972 {
973 if (substream->runtime->trigger_master != substream)
974 return 0;
975 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
976 * a delta betwen the current jiffies, this gives a large enough
977 * delta, effectively to skip the check once.
978 */
979 substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
980 return substream->ops->trigger(substream,
981 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
982 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
983 }
984
985 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
986 {
987 if (substream->runtime->trigger_master == substream)
988 substream->ops->trigger(substream,
989 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
990 SNDRV_PCM_TRIGGER_PAUSE_PUSH);
991 }
992
993 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
994 {
995 struct snd_pcm_runtime *runtime = substream->runtime;
996 snd_pcm_trigger_tstamp(substream);
997 if (push) {
998 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
999 if (substream->timer)
1000 snd_timer_notify(substream->timer,
1001 SNDRV_TIMER_EVENT_MPAUSE,
1002 &runtime->trigger_tstamp);
1003 wake_up(&runtime->sleep);
1004 } else {
1005 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1006 if (substream->timer)
1007 snd_timer_notify(substream->timer,
1008 SNDRV_TIMER_EVENT_MCONTINUE,
1009 &runtime->trigger_tstamp);
1010 }
1011 }
1012
1013 static struct action_ops snd_pcm_action_pause = {
1014 .pre_action = snd_pcm_pre_pause,
1015 .do_action = snd_pcm_do_pause,
1016 .undo_action = snd_pcm_undo_pause,
1017 .post_action = snd_pcm_post_pause
1018 };
1019
1020 /*
1021 * Push/release the pause for all linked streams.
1022 */
1023 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1024 {
1025 return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1026 }
1027
1028 #ifdef CONFIG_PM
1029 /* suspend */
1030
1031 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1032 {
1033 struct snd_pcm_runtime *runtime = substream->runtime;
1034 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1035 return -EBUSY;
1036 runtime->trigger_master = substream;
1037 return 0;
1038 }
1039
1040 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1041 {
1042 struct snd_pcm_runtime *runtime = substream->runtime;
1043 if (runtime->trigger_master != substream)
1044 return 0;
1045 if (! snd_pcm_running(substream))
1046 return 0;
1047 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1048 return 0; /* suspend unconditionally */
1049 }
1050
1051 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1052 {
1053 struct snd_pcm_runtime *runtime = substream->runtime;
1054 snd_pcm_trigger_tstamp(substream);
1055 if (substream->timer)
1056 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1057 &runtime->trigger_tstamp);
1058 runtime->status->suspended_state = runtime->status->state;
1059 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1060 wake_up(&runtime->sleep);
1061 }
1062
1063 static struct action_ops snd_pcm_action_suspend = {
1064 .pre_action = snd_pcm_pre_suspend,
1065 .do_action = snd_pcm_do_suspend,
1066 .post_action = snd_pcm_post_suspend
1067 };
1068
1069 /**
1070 * snd_pcm_suspend - trigger SUSPEND to all linked streams
1071 * @substream: the PCM substream
1072 *
1073 * After this call, all streams are changed to SUSPENDED state.
1074 */
1075 int snd_pcm_suspend(struct snd_pcm_substream *substream)
1076 {
1077 int err;
1078 unsigned long flags;
1079
1080 if (! substream)
1081 return 0;
1082
1083 snd_pcm_stream_lock_irqsave(substream, flags);
1084 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1085 snd_pcm_stream_unlock_irqrestore(substream, flags);
1086 return err;
1087 }
1088
1089 EXPORT_SYMBOL(snd_pcm_suspend);
1090
1091 /**
1092 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
1093 * @pcm: the PCM instance
1094 *
1095 * After this call, all streams are changed to SUSPENDED state.
1096 */
1097 int snd_pcm_suspend_all(struct snd_pcm *pcm)
1098 {
1099 struct snd_pcm_substream *substream;
1100 int stream, err = 0;
1101
1102 if (! pcm)
1103 return 0;
1104
1105 for (stream = 0; stream < 2; stream++) {
1106 for (substream = pcm->streams[stream].substream;
1107 substream; substream = substream->next) {
1108 /* FIXME: the open/close code should lock this as well */
1109 if (substream->runtime == NULL)
1110 continue;
1111 err = snd_pcm_suspend(substream);
1112 if (err < 0 && err != -EBUSY)
1113 return err;
1114 }
1115 }
1116 return 0;
1117 }
1118
1119 EXPORT_SYMBOL(snd_pcm_suspend_all);
1120
1121 /* resume */
1122
1123 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1124 {
1125 struct snd_pcm_runtime *runtime = substream->runtime;
1126 if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1127 return -ENOSYS;
1128 runtime->trigger_master = substream;
1129 return 0;
1130 }
1131
1132 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1133 {
1134 struct snd_pcm_runtime *runtime = substream->runtime;
1135 if (runtime->trigger_master != substream)
1136 return 0;
1137 /* DMA not running previously? */
1138 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1139 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1140 substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1141 return 0;
1142 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1143 }
1144
1145 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1146 {
1147 if (substream->runtime->trigger_master == substream &&
1148 snd_pcm_running(substream))
1149 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1150 }
1151
1152 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1153 {
1154 struct snd_pcm_runtime *runtime = substream->runtime;
1155 snd_pcm_trigger_tstamp(substream);
1156 if (substream->timer)
1157 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1158 &runtime->trigger_tstamp);
1159 runtime->status->state = runtime->status->suspended_state;
1160 }
1161
1162 static struct action_ops snd_pcm_action_resume = {
1163 .pre_action = snd_pcm_pre_resume,
1164 .do_action = snd_pcm_do_resume,
1165 .undo_action = snd_pcm_undo_resume,
1166 .post_action = snd_pcm_post_resume
1167 };
1168
1169 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1170 {
1171 struct snd_card *card = substream->pcm->card;
1172 int res;
1173
1174 snd_power_lock(card);
1175 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1176 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1177 snd_power_unlock(card);
1178 return res;
1179 }
1180
1181 #else
1182
1183 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1184 {
1185 return -ENOSYS;
1186 }
1187
1188 #endif /* CONFIG_PM */
1189
1190 /*
1191 * xrun ioctl
1192 *
1193 * Change the RUNNING stream(s) to XRUN state.
1194 */
1195 static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1196 {
1197 struct snd_card *card = substream->pcm->card;
1198 struct snd_pcm_runtime *runtime = substream->runtime;
1199 int result;
1200
1201 snd_power_lock(card);
1202 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1203 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1204 if (result < 0)
1205 goto _unlock;
1206 }
1207
1208 snd_pcm_stream_lock_irq(substream);
1209 switch (runtime->status->state) {
1210 case SNDRV_PCM_STATE_XRUN:
1211 result = 0; /* already there */
1212 break;
1213 case SNDRV_PCM_STATE_RUNNING:
1214 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1215 break;
1216 default:
1217 result = -EBADFD;
1218 }
1219 snd_pcm_stream_unlock_irq(substream);
1220 _unlock:
1221 snd_power_unlock(card);
1222 return result;
1223 }
1224
1225 /*
1226 * reset ioctl
1227 */
1228 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1229 {
1230 struct snd_pcm_runtime *runtime = substream->runtime;
1231 switch (runtime->status->state) {
1232 case SNDRV_PCM_STATE_RUNNING:
1233 case SNDRV_PCM_STATE_PREPARED:
1234 case SNDRV_PCM_STATE_PAUSED:
1235 case SNDRV_PCM_STATE_SUSPENDED:
1236 return 0;
1237 default:
1238 return -EBADFD;
1239 }
1240 }
1241
1242 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1243 {
1244 struct snd_pcm_runtime *runtime = substream->runtime;
1245 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1246 if (err < 0)
1247 return err;
1248 runtime->hw_ptr_base = 0;
1249 runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1250 runtime->status->hw_ptr % runtime->period_size;
1251 runtime->silence_start = runtime->status->hw_ptr;
1252 runtime->silence_filled = 0;
1253 return 0;
1254 }
1255
1256 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1257 {
1258 struct snd_pcm_runtime *runtime = substream->runtime;
1259 runtime->control->appl_ptr = runtime->status->hw_ptr;
1260 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1261 runtime->silence_size > 0)
1262 snd_pcm_playback_silence(substream, ULONG_MAX);
1263 }
1264
1265 static struct action_ops snd_pcm_action_reset = {
1266 .pre_action = snd_pcm_pre_reset,
1267 .do_action = snd_pcm_do_reset,
1268 .post_action = snd_pcm_post_reset
1269 };
1270
1271 static int snd_pcm_reset(struct snd_pcm_substream *substream)
1272 {
1273 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1274 }
1275
1276 /*
1277 * prepare ioctl
1278 */
1279 /* we use the second argument for updating f_flags */
1280 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1281 int f_flags)
1282 {
1283 struct snd_pcm_runtime *runtime = substream->runtime;
1284 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1285 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1286 return -EBADFD;
1287 if (snd_pcm_running(substream))
1288 return -EBUSY;
1289 substream->f_flags = f_flags;
1290 return 0;
1291 }
1292
1293 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1294 {
1295 int err;
1296 err = substream->ops->prepare(substream);
1297 if (err < 0)
1298 return err;
1299 return snd_pcm_do_reset(substream, 0);
1300 }
1301
1302 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1303 {
1304 struct snd_pcm_runtime *runtime = substream->runtime;
1305 runtime->control->appl_ptr = runtime->status->hw_ptr;
1306 runtime->status->state = SNDRV_PCM_STATE_PREPARED;
1307 }
1308
1309 static struct action_ops snd_pcm_action_prepare = {
1310 .pre_action = snd_pcm_pre_prepare,
1311 .do_action = snd_pcm_do_prepare,
1312 .post_action = snd_pcm_post_prepare
1313 };
1314
1315 /**
1316 * snd_pcm_prepare - prepare the PCM substream to be triggerable
1317 * @substream: the PCM substream instance
1318 * @file: file to refer f_flags
1319 */
1320 static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1321 struct file *file)
1322 {
1323 int res;
1324 struct snd_card *card = substream->pcm->card;
1325 int f_flags;
1326
1327 if (file)
1328 f_flags = file->f_flags;
1329 else
1330 f_flags = substream->f_flags;
1331
1332 snd_power_lock(card);
1333 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1334 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1335 substream, f_flags);
1336 snd_power_unlock(card);
1337 return res;
1338 }
1339
1340 /*
1341 * drain ioctl
1342 */
1343
1344 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1345 {
1346 substream->runtime->trigger_master = substream;
1347 return 0;
1348 }
1349
1350 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1351 {
1352 struct snd_pcm_runtime *runtime = substream->runtime;
1353 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1354 switch (runtime->status->state) {
1355 case SNDRV_PCM_STATE_PREPARED:
1356 /* start playback stream if possible */
1357 if (! snd_pcm_playback_empty(substream)) {
1358 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1359 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1360 }
1361 break;
1362 case SNDRV_PCM_STATE_RUNNING:
1363 runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1364 break;
1365 default:
1366 break;
1367 }
1368 } else {
1369 /* stop running stream */
1370 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1371 int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1372 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1373 snd_pcm_do_stop(substream, new_state);
1374 snd_pcm_post_stop(substream, new_state);
1375 }
1376 }
1377 return 0;
1378 }
1379
1380 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1381 {
1382 }
1383
1384 static struct action_ops snd_pcm_action_drain_init = {
1385 .pre_action = snd_pcm_pre_drain_init,
1386 .do_action = snd_pcm_do_drain_init,
1387 .post_action = snd_pcm_post_drain_init
1388 };
1389
1390 struct drain_rec {
1391 struct snd_pcm_substream *substream;
1392 wait_queue_t wait;
1393 };
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 struct file *file)
1406 {
1407 struct snd_card *card;
1408 struct snd_pcm_runtime *runtime;
1409 struct snd_pcm_substream *s;
1410 int result = 0;
1411 int i, num_drecs;
1412 int nonblock = 0;
1413 struct drain_rec *drec, drec_tmp, *d;
1414
1415 card = substream->pcm->card;
1416 runtime = substream->runtime;
1417
1418 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1419 return -EBADFD;
1420
1421 snd_power_lock(card);
1422 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1423 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1424 if (result < 0) {
1425 snd_power_unlock(card);
1426 return result;
1427 }
1428 }
1429
1430 if (file) {
1431 if (file->f_flags & O_NONBLOCK)
1432 nonblock = 1;
1433 } else if (substream->f_flags & O_NONBLOCK)
1434 nonblock = 1;
1435
1436 if (nonblock)
1437 goto lock; /* no need to allocate waitqueues */
1438
1439 /* allocate temporary record for drain sync */
1440 down_read(&snd_pcm_link_rwsem);
1441 if (snd_pcm_stream_linked(substream)) {
1442 drec = kmalloc(substream->group->count * sizeof(*drec), GFP_KERNEL);
1443 if (! drec) {
1444 up_read(&snd_pcm_link_rwsem);
1445 snd_power_unlock(card);
1446 return -ENOMEM;
1447 }
1448 } else
1449 drec = &drec_tmp;
1450
1451 /* count only playback streams */
1452 num_drecs = 0;
1453 snd_pcm_group_for_each_entry(s, substream) {
1454 runtime = s->runtime;
1455 if (s->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1456 d = &drec[num_drecs++];
1457 d->substream = s;
1458 init_waitqueue_entry(&d->wait, current);
1459 add_wait_queue(&runtime->sleep, &d->wait);
1460 }
1461 }
1462 up_read(&snd_pcm_link_rwsem);
1463
1464 lock:
1465 snd_pcm_stream_lock_irq(substream);
1466 /* resume pause */
1467 if (substream->runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1468 snd_pcm_pause(substream, 0);
1469
1470 /* pre-start/stop - all running streams are changed to DRAINING state */
1471 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1472 if (result < 0)
1473 goto unlock;
1474 /* in non-blocking, we don't wait in ioctl but let caller poll */
1475 if (nonblock) {
1476 result = -EAGAIN;
1477 goto unlock;
1478 }
1479
1480 for (;;) {
1481 long tout;
1482 if (signal_pending(current)) {
1483 result = -ERESTARTSYS;
1484 break;
1485 }
1486 /* all finished? */
1487 for (i = 0; i < num_drecs; i++) {
1488 runtime = drec[i].substream->runtime;
1489 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING)
1490 break;
1491 }
1492 if (i == num_drecs)
1493 break; /* yes, all drained */
1494
1495 set_current_state(TASK_INTERRUPTIBLE);
1496 snd_pcm_stream_unlock_irq(substream);
1497 snd_power_unlock(card);
1498 tout = schedule_timeout(10 * HZ);
1499 snd_power_lock(card);
1500 snd_pcm_stream_lock_irq(substream);
1501 if (tout == 0) {
1502 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1503 result = -ESTRPIPE;
1504 else {
1505 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1506 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1507 result = -EIO;
1508 }
1509 break;
1510 }
1511 }
1512
1513 unlock:
1514 snd_pcm_stream_unlock_irq(substream);
1515
1516 if (!nonblock) {
1517 for (i = 0; i < num_drecs; i++) {
1518 d = &drec[i];
1519 runtime = d->substream->runtime;
1520 remove_wait_queue(&runtime->sleep, &d->wait);
1521 }
1522 if (drec != &drec_tmp)
1523 kfree(drec);
1524 }
1525 snd_power_unlock(card);
1526
1527 return result;
1528 }
1529
1530 /*
1531 * drop ioctl
1532 *
1533 * Immediately put all linked substreams into SETUP state.
1534 */
1535 static int snd_pcm_drop(struct snd_pcm_substream *substream)
1536 {
1537 struct snd_pcm_runtime *runtime;
1538 struct snd_card *card;
1539 int result = 0;
1540
1541 if (PCM_RUNTIME_CHECK(substream))
1542 return -ENXIO;
1543 runtime = substream->runtime;
1544 card = substream->pcm->card;
1545
1546 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1547 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1548 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1549 return -EBADFD;
1550
1551 snd_pcm_stream_lock_irq(substream);
1552 /* resume pause */
1553 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1554 snd_pcm_pause(substream, 0);
1555
1556 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1557 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1558 snd_pcm_stream_unlock_irq(substream);
1559
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_path.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 snd_pcm_substream *s;
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_entry(s, substream) {
1658 relink_to_local(s);
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 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1765 .count = ARRAY_SIZE(rates),
1766 .list = rates,
1767 };
1768
1769 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1770 struct snd_pcm_hw_rule *rule)
1771 {
1772 struct snd_pcm_hardware *hw = rule->private;
1773 return snd_interval_list(hw_param_interval(params, rule->var),
1774 snd_pcm_known_rates.count,
1775 snd_pcm_known_rates.list, hw->rates);
1776 }
1777
1778 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1779 struct snd_pcm_hw_rule *rule)
1780 {
1781 struct snd_interval t;
1782 struct snd_pcm_substream *substream = rule->private;
1783 t.min = 0;
1784 t.max = substream->buffer_bytes_max;
1785 t.openmin = 0;
1786 t.openmax = 0;
1787 t.integer = 1;
1788 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1789 }
1790
1791 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1792 {
1793 struct snd_pcm_runtime *runtime = substream->runtime;
1794 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1795 int k, err;
1796
1797 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1798 snd_mask_any(constrs_mask(constrs, k));
1799 }
1800
1801 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1802 snd_interval_any(constrs_interval(constrs, k));
1803 }
1804
1805 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1806 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1807 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1808 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1809 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1810
1811 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1812 snd_pcm_hw_rule_format, NULL,
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_sample_bits, NULL,
1818 SNDRV_PCM_HW_PARAM_FORMAT,
1819 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1820 if (err < 0)
1821 return err;
1822 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1823 snd_pcm_hw_rule_div, NULL,
1824 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1825 if (err < 0)
1826 return err;
1827 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1828 snd_pcm_hw_rule_mul, NULL,
1829 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1830 if (err < 0)
1831 return err;
1832 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1833 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1834 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1835 if (err < 0)
1836 return err;
1837 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1838 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1839 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1840 if (err < 0)
1841 return err;
1842 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1843 snd_pcm_hw_rule_div, NULL,
1844 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1845 if (err < 0)
1846 return err;
1847 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1848 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1849 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1850 if (err < 0)
1851 return err;
1852 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1853 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1854 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1855 if (err < 0)
1856 return err;
1857 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
1858 snd_pcm_hw_rule_div, NULL,
1859 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1860 if (err < 0)
1861 return err;
1862 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1863 snd_pcm_hw_rule_div, NULL,
1864 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1865 if (err < 0)
1866 return err;
1867 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1868 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1869 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1870 if (err < 0)
1871 return err;
1872 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1873 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1874 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1875 if (err < 0)
1876 return err;
1877 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1878 snd_pcm_hw_rule_mul, NULL,
1879 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1880 if (err < 0)
1881 return err;
1882 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1883 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1884 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1885 if (err < 0)
1886 return err;
1887 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1888 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1889 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1890 if (err < 0)
1891 return err;
1892 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1893 snd_pcm_hw_rule_muldivk, (void*) 8,
1894 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1895 if (err < 0)
1896 return err;
1897 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1898 snd_pcm_hw_rule_muldivk, (void*) 8,
1899 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1900 if (err < 0)
1901 return err;
1902 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1903 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1904 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1905 if (err < 0)
1906 return err;
1907 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
1908 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1909 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1910 if (err < 0)
1911 return err;
1912 return 0;
1913 }
1914
1915 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1916 {
1917 struct snd_pcm_runtime *runtime = substream->runtime;
1918 struct snd_pcm_hardware *hw = &runtime->hw;
1919 int err;
1920 unsigned int mask = 0;
1921
1922 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1923 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1924 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1925 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1926 if (hw->info & SNDRV_PCM_INFO_MMAP) {
1927 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1928 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1929 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1930 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1931 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1932 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1933 }
1934 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
1935 if (err < 0)
1936 return err;
1937
1938 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
1939 if (err < 0)
1940 return err;
1941
1942 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
1943 if (err < 0)
1944 return err;
1945
1946 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1947 hw->channels_min, hw->channels_max);
1948 if (err < 0)
1949 return err;
1950
1951 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1952 hw->rate_min, hw->rate_max);
1953 if (err < 0)
1954 return err;
1955
1956 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1957 hw->period_bytes_min, hw->period_bytes_max);
1958 if (err < 0)
1959 return err;
1960
1961 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1962 hw->periods_min, hw->periods_max);
1963 if (err < 0)
1964 return err;
1965
1966 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1967 hw->period_bytes_min, hw->buffer_bytes_max);
1968 if (err < 0)
1969 return err;
1970
1971 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1972 snd_pcm_hw_rule_buffer_bytes_max, substream,
1973 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1974 if (err < 0)
1975 return err;
1976
1977 /* FIXME: remove */
1978 if (runtime->dma_bytes) {
1979 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
1980 if (err < 0)
1981 return -EINVAL;
1982 }
1983
1984 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
1985 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1986 snd_pcm_hw_rule_rate, hw,
1987 SNDRV_PCM_HW_PARAM_RATE, -1);
1988 if (err < 0)
1989 return err;
1990 }
1991
1992 /* FIXME: this belong to lowlevel */
1993 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
1994
1995 return 0;
1996 }
1997
1998 static void pcm_release_private(struct snd_pcm_substream *substream)
1999 {
2000 snd_pcm_unlink(substream);
2001 }
2002
2003 void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2004 {
2005 substream->ref_count--;
2006 if (substream->ref_count > 0)
2007 return;
2008
2009 snd_pcm_drop(substream);
2010 if (substream->hw_opened) {
2011 if (substream->ops->hw_free != NULL)
2012 substream->ops->hw_free(substream);
2013 substream->ops->close(substream);
2014 substream->hw_opened = 0;
2015 }
2016 if (substream->pcm_release) {
2017 substream->pcm_release(substream);
2018 substream->pcm_release = NULL;
2019 }
2020 snd_pcm_detach_substream(substream);
2021 }
2022
2023 EXPORT_SYMBOL(snd_pcm_release_substream);
2024
2025 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2026 struct file *file,
2027 struct snd_pcm_substream **rsubstream)
2028 {
2029 struct snd_pcm_substream *substream;
2030 int err;
2031
2032 err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2033 if (err < 0)
2034 return err;
2035 if (substream->ref_count > 1) {
2036 *rsubstream = substream;
2037 return 0;
2038 }
2039
2040 err = snd_pcm_hw_constraints_init(substream);
2041 if (err < 0) {
2042 snd_printd("snd_pcm_hw_constraints_init failed\n");
2043 goto error;
2044 }
2045
2046 if ((err = substream->ops->open(substream)) < 0)
2047 goto error;
2048
2049 substream->hw_opened = 1;
2050
2051 err = snd_pcm_hw_constraints_complete(substream);
2052 if (err < 0) {
2053 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2054 goto error;
2055 }
2056
2057 *rsubstream = substream;
2058 return 0;
2059
2060 error:
2061 snd_pcm_release_substream(substream);
2062 return err;
2063 }
2064
2065 EXPORT_SYMBOL(snd_pcm_open_substream);
2066
2067 static int snd_pcm_open_file(struct file *file,
2068 struct snd_pcm *pcm,
2069 int stream,
2070 struct snd_pcm_file **rpcm_file)
2071 {
2072 struct snd_pcm_file *pcm_file;
2073 struct snd_pcm_substream *substream;
2074 struct snd_pcm_str *str;
2075 int err;
2076
2077 if (rpcm_file)
2078 *rpcm_file = NULL;
2079
2080 err = snd_pcm_open_substream(pcm, stream, file, &substream);
2081 if (err < 0)
2082 return err;
2083
2084 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2085 if (pcm_file == NULL) {
2086 snd_pcm_release_substream(substream);
2087 return -ENOMEM;
2088 }
2089 pcm_file->substream = substream;
2090 if (substream->ref_count == 1) {
2091 str = substream->pstr;
2092 substream->file = pcm_file;
2093 substream->pcm_release = pcm_release_private;
2094 }
2095 file->private_data = pcm_file;
2096 if (rpcm_file)
2097 *rpcm_file = pcm_file;
2098 return 0;
2099 }
2100
2101 static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2102 {
2103 struct snd_pcm *pcm;
2104
2105 pcm = snd_lookup_minor_data(iminor(inode),
2106 SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2107 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2108 }
2109
2110 static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2111 {
2112 struct snd_pcm *pcm;
2113
2114 pcm = snd_lookup_minor_data(iminor(inode),
2115 SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2116 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2117 }
2118
2119 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2120 {
2121 int err;
2122 struct snd_pcm_file *pcm_file;
2123 wait_queue_t wait;
2124
2125 if (pcm == NULL) {
2126 err = -ENODEV;
2127 goto __error1;
2128 }
2129 err = snd_card_file_add(pcm->card, file);
2130 if (err < 0)
2131 goto __error1;
2132 if (!try_module_get(pcm->card->module)) {
2133 err = -EFAULT;
2134 goto __error2;
2135 }
2136 init_waitqueue_entry(&wait, current);
2137 add_wait_queue(&pcm->open_wait, &wait);
2138 mutex_lock(&pcm->open_mutex);
2139 while (1) {
2140 err = snd_pcm_open_file(file, pcm, stream, &pcm_file);
2141 if (err >= 0)
2142 break;
2143 if (err == -EAGAIN) {
2144 if (file->f_flags & O_NONBLOCK) {
2145 err = -EBUSY;
2146 break;
2147 }
2148 } else
2149 break;
2150 set_current_state(TASK_INTERRUPTIBLE);
2151 mutex_unlock(&pcm->open_mutex);
2152 schedule();
2153 mutex_lock(&pcm->open_mutex);
2154 if (signal_pending(current)) {
2155 err = -ERESTARTSYS;
2156 break;
2157 }
2158 }
2159 remove_wait_queue(&pcm->open_wait, &wait);
2160 mutex_unlock(&pcm->open_mutex);
2161 if (err < 0)
2162 goto __error;
2163 return err;
2164
2165 __error:
2166 module_put(pcm->card->module);
2167 __error2:
2168 snd_card_file_remove(pcm->card, file);
2169 __error1:
2170 return err;
2171 }
2172
2173 static int snd_pcm_release(struct inode *inode, struct file *file)
2174 {
2175 struct snd_pcm *pcm;
2176 struct snd_pcm_substream *substream;
2177 struct snd_pcm_file *pcm_file;
2178
2179 pcm_file = file->private_data;
2180 substream = pcm_file->substream;
2181 if (snd_BUG_ON(!substream))
2182 return -ENXIO;
2183 pcm = substream->pcm;
2184 mutex_lock(&pcm->open_mutex);
2185 snd_pcm_release_substream(substream);
2186 kfree(pcm_file);
2187 mutex_unlock(&pcm->open_mutex);
2188 wake_up(&pcm->open_wait);
2189 module_put(pcm->card->module);
2190 snd_card_file_remove(pcm->card, file);
2191 return 0;
2192 }
2193
2194 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2195 snd_pcm_uframes_t frames)
2196 {
2197 struct snd_pcm_runtime *runtime = substream->runtime;
2198 snd_pcm_sframes_t appl_ptr;
2199 snd_pcm_sframes_t ret;
2200 snd_pcm_sframes_t hw_avail;
2201
2202 if (frames == 0)
2203 return 0;
2204
2205 snd_pcm_stream_lock_irq(substream);
2206 switch (runtime->status->state) {
2207 case SNDRV_PCM_STATE_PREPARED:
2208 break;
2209 case SNDRV_PCM_STATE_DRAINING:
2210 case SNDRV_PCM_STATE_RUNNING:
2211 if (snd_pcm_update_hw_ptr(substream) >= 0)
2212 break;
2213 /* Fall through */
2214 case SNDRV_PCM_STATE_XRUN:
2215 ret = -EPIPE;
2216 goto __end;
2217 case SNDRV_PCM_STATE_SUSPENDED:
2218 ret = -ESTRPIPE;
2219 goto __end;
2220 default:
2221 ret = -EBADFD;
2222 goto __end;
2223 }
2224
2225 hw_avail = snd_pcm_playback_hw_avail(runtime);
2226 if (hw_avail <= 0) {
2227 ret = 0;
2228 goto __end;
2229 }
2230 if (frames > (snd_pcm_uframes_t)hw_avail)
2231 frames = hw_avail;
2232 appl_ptr = runtime->control->appl_ptr - frames;
2233 if (appl_ptr < 0)
2234 appl_ptr += runtime->boundary;
2235 runtime->control->appl_ptr = appl_ptr;
2236 ret = frames;
2237 __end:
2238 snd_pcm_stream_unlock_irq(substream);
2239 return ret;
2240 }
2241
2242 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2243 snd_pcm_uframes_t frames)
2244 {
2245 struct snd_pcm_runtime *runtime = substream->runtime;
2246 snd_pcm_sframes_t appl_ptr;
2247 snd_pcm_sframes_t ret;
2248 snd_pcm_sframes_t hw_avail;
2249
2250 if (frames == 0)
2251 return 0;
2252
2253 snd_pcm_stream_lock_irq(substream);
2254 switch (runtime->status->state) {
2255 case SNDRV_PCM_STATE_PREPARED:
2256 case SNDRV_PCM_STATE_DRAINING:
2257 break;
2258 case SNDRV_PCM_STATE_RUNNING:
2259 if (snd_pcm_update_hw_ptr(substream) >= 0)
2260 break;
2261 /* Fall through */
2262 case SNDRV_PCM_STATE_XRUN:
2263 ret = -EPIPE;
2264 goto __end;
2265 case SNDRV_PCM_STATE_SUSPENDED:
2266 ret = -ESTRPIPE;
2267 goto __end;
2268 default:
2269 ret = -EBADFD;
2270 goto __end;
2271 }
2272
2273 hw_avail = snd_pcm_capture_hw_avail(runtime);
2274 if (hw_avail <= 0) {
2275 ret = 0;
2276 goto __end;
2277 }
2278 if (frames > (snd_pcm_uframes_t)hw_avail)
2279 frames = hw_avail;
2280 appl_ptr = runtime->control->appl_ptr - frames;
2281 if (appl_ptr < 0)
2282 appl_ptr += runtime->boundary;
2283 runtime->control->appl_ptr = appl_ptr;
2284 ret = frames;
2285 __end:
2286 snd_pcm_stream_unlock_irq(substream);
2287 return ret;
2288 }
2289
2290 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2291 snd_pcm_uframes_t frames)
2292 {
2293 struct snd_pcm_runtime *runtime = substream->runtime;
2294 snd_pcm_sframes_t appl_ptr;
2295 snd_pcm_sframes_t ret;
2296 snd_pcm_sframes_t avail;
2297
2298 if (frames == 0)
2299 return 0;
2300
2301 snd_pcm_stream_lock_irq(substream);
2302 switch (runtime->status->state) {
2303 case SNDRV_PCM_STATE_PREPARED:
2304 case SNDRV_PCM_STATE_PAUSED:
2305 break;
2306 case SNDRV_PCM_STATE_DRAINING:
2307 case SNDRV_PCM_STATE_RUNNING:
2308 if (snd_pcm_update_hw_ptr(substream) >= 0)
2309 break;
2310 /* Fall through */
2311 case SNDRV_PCM_STATE_XRUN:
2312 ret = -EPIPE;
2313 goto __end;
2314 case SNDRV_PCM_STATE_SUSPENDED:
2315 ret = -ESTRPIPE;
2316 goto __end;
2317 default:
2318 ret = -EBADFD;
2319 goto __end;
2320 }
2321
2322 avail = snd_pcm_playback_avail(runtime);
2323 if (avail <= 0) {
2324 ret = 0;
2325 goto __end;
2326 }
2327 if (frames > (snd_pcm_uframes_t)avail)
2328 frames = avail;
2329 appl_ptr = runtime->control->appl_ptr + frames;
2330 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2331 appl_ptr -= runtime->boundary;
2332 runtime->control->appl_ptr = appl_ptr;
2333 ret = frames;
2334 __end:
2335 snd_pcm_stream_unlock_irq(substream);
2336 return ret;
2337 }
2338
2339 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2340 snd_pcm_uframes_t frames)
2341 {
2342 struct snd_pcm_runtime *runtime = substream->runtime;
2343 snd_pcm_sframes_t appl_ptr;
2344 snd_pcm_sframes_t ret;
2345 snd_pcm_sframes_t avail;
2346
2347 if (frames == 0)
2348 return 0;
2349
2350 snd_pcm_stream_lock_irq(substream);
2351 switch (runtime->status->state) {
2352 case SNDRV_PCM_STATE_PREPARED:
2353 case SNDRV_PCM_STATE_DRAINING:
2354 case SNDRV_PCM_STATE_PAUSED:
2355 break;
2356 case SNDRV_PCM_STATE_RUNNING:
2357 if (snd_pcm_update_hw_ptr(substream) >= 0)
2358 break;
2359 /* Fall through */
2360 case SNDRV_PCM_STATE_XRUN:
2361 ret = -EPIPE;
2362 goto __end;
2363 case SNDRV_PCM_STATE_SUSPENDED:
2364 ret = -ESTRPIPE;
2365 goto __end;
2366 default:
2367 ret = -EBADFD;
2368 goto __end;
2369 }
2370
2371 avail = snd_pcm_capture_avail(runtime);
2372 if (avail <= 0) {
2373 ret = 0;
2374 goto __end;
2375 }
2376 if (frames > (snd_pcm_uframes_t)avail)
2377 frames = avail;
2378 appl_ptr = runtime->control->appl_ptr + frames;
2379 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2380 appl_ptr -= runtime->boundary;
2381 runtime->control->appl_ptr = appl_ptr;
2382 ret = frames;
2383 __end:
2384 snd_pcm_stream_unlock_irq(substream);
2385 return ret;
2386 }
2387
2388 static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2389 {
2390 struct snd_pcm_runtime *runtime = substream->runtime;
2391 int err;
2392
2393 snd_pcm_stream_lock_irq(substream);
2394 switch (runtime->status->state) {
2395 case SNDRV_PCM_STATE_DRAINING:
2396 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2397 goto __badfd;
2398 case SNDRV_PCM_STATE_RUNNING:
2399 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2400 break;
2401 /* Fall through */
2402 case SNDRV_PCM_STATE_PREPARED:
2403 case SNDRV_PCM_STATE_SUSPENDED:
2404 err = 0;
2405 break;
2406 case SNDRV_PCM_STATE_XRUN:
2407 err = -EPIPE;
2408 break;
2409 default:
2410 __badfd:
2411 err = -EBADFD;
2412 break;
2413 }
2414 snd_pcm_stream_unlock_irq(substream);
2415 return err;
2416 }
2417
2418 static int snd_pcm_delay(struct snd_pcm_substream *substream,
2419 snd_pcm_sframes_t __user *res)
2420 {
2421 struct snd_pcm_runtime *runtime = substream->runtime;
2422 int err;
2423 snd_pcm_sframes_t n = 0;
2424
2425 snd_pcm_stream_lock_irq(substream);
2426 switch (runtime->status->state) {
2427 case SNDRV_PCM_STATE_DRAINING:
2428 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2429 goto __badfd;
2430 case SNDRV_PCM_STATE_RUNNING:
2431 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2432 break;
2433 /* Fall through */
2434 case SNDRV_PCM_STATE_PREPARED:
2435 case SNDRV_PCM_STATE_SUSPENDED:
2436 err = 0;
2437 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2438 n = snd_pcm_playback_hw_avail(runtime);
2439 else
2440 n = snd_pcm_capture_avail(runtime);
2441 n += runtime->delay;
2442 break;
2443 case SNDRV_PCM_STATE_XRUN:
2444 err = -EPIPE;
2445 break;
2446 default:
2447 __badfd:
2448 err = -EBADFD;
2449 break;
2450 }
2451 snd_pcm_stream_unlock_irq(substream);
2452 if (!err)
2453 if (put_user(n, res))
2454 err = -EFAULT;
2455 return err;
2456 }
2457
2458 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2459 struct snd_pcm_sync_ptr __user *_sync_ptr)
2460 {
2461 struct snd_pcm_runtime *runtime = substream->runtime;
2462 struct snd_pcm_sync_ptr sync_ptr;
2463 volatile struct snd_pcm_mmap_status *status;
2464 volatile struct snd_pcm_mmap_control *control;
2465 int err;
2466
2467 memset(&sync_ptr, 0, sizeof(sync_ptr));
2468 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2469 return -EFAULT;
2470 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2471 return -EFAULT;
2472 status = runtime->status;
2473 control = runtime->control;
2474 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2475 err = snd_pcm_hwsync(substream);
2476 if (err < 0)
2477 return err;
2478 }
2479 snd_pcm_stream_lock_irq(substream);
2480 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2481 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2482 else
2483 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2484 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2485 control->avail_min = sync_ptr.c.control.avail_min;
2486 else
2487 sync_ptr.c.control.avail_min = control->avail_min;
2488 sync_ptr.s.status.state = status->state;
2489 sync_ptr.s.status.hw_ptr = status->hw_ptr;
2490 sync_ptr.s.status.tstamp = status->tstamp;
2491 sync_ptr.s.status.suspended_state = status->suspended_state;
2492 snd_pcm_stream_unlock_irq(substream);
2493 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2494 return -EFAULT;
2495 return 0;
2496 }
2497
2498 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2499 {
2500 struct snd_pcm_runtime *runtime = substream->runtime;
2501 int arg;
2502
2503 if (get_user(arg, _arg))
2504 return -EFAULT;
2505 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2506 return -EINVAL;
2507 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY;
2508 if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
2509 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC;
2510 return 0;
2511 }
2512
2513 static int snd_pcm_common_ioctl1(struct file *file,
2514 struct snd_pcm_substream *substream,
2515 unsigned int cmd, void __user *arg)
2516 {
2517 switch (cmd) {
2518 case SNDRV_PCM_IOCTL_PVERSION:
2519 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2520 case SNDRV_PCM_IOCTL_INFO:
2521 return snd_pcm_info_user(substream, arg);
2522 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
2523 return 0;
2524 case SNDRV_PCM_IOCTL_TTSTAMP:
2525 return snd_pcm_tstamp(substream, arg);
2526 case SNDRV_PCM_IOCTL_HW_REFINE:
2527 return snd_pcm_hw_refine_user(substream, arg);
2528 case SNDRV_PCM_IOCTL_HW_PARAMS:
2529 return snd_pcm_hw_params_user(substream, arg);
2530 case SNDRV_PCM_IOCTL_HW_FREE:
2531 return snd_pcm_hw_free(substream);
2532 case SNDRV_PCM_IOCTL_SW_PARAMS:
2533 return snd_pcm_sw_params_user(substream, arg);
2534 case SNDRV_PCM_IOCTL_STATUS:
2535 return snd_pcm_status_user(substream, arg);
2536 case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2537 return snd_pcm_channel_info_user(substream, arg);
2538 case SNDRV_PCM_IOCTL_PREPARE:
2539 return snd_pcm_prepare(substream, file);
2540 case SNDRV_PCM_IOCTL_RESET:
2541 return snd_pcm_reset(substream);
2542 case SNDRV_PCM_IOCTL_START:
2543 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2544 case SNDRV_PCM_IOCTL_LINK:
2545 return snd_pcm_link(substream, (int)(unsigned long) arg);
2546 case SNDRV_PCM_IOCTL_UNLINK:
2547 return snd_pcm_unlink(substream);
2548 case SNDRV_PCM_IOCTL_RESUME:
2549 return snd_pcm_resume(substream);
2550 case SNDRV_PCM_IOCTL_XRUN:
2551 return snd_pcm_xrun(substream);
2552 case SNDRV_PCM_IOCTL_HWSYNC:
2553 return snd_pcm_hwsync(substream);
2554 case SNDRV_PCM_IOCTL_DELAY:
2555 return snd_pcm_delay(substream, arg);
2556 case SNDRV_PCM_IOCTL_SYNC_PTR:
2557 return snd_pcm_sync_ptr(substream, arg);
2558 #ifdef CONFIG_SND_SUPPORT_OLD_API
2559 case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2560 return snd_pcm_hw_refine_old_user(substream, arg);
2561 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2562 return snd_pcm_hw_params_old_user(substream, arg);
2563 #endif
2564 case SNDRV_PCM_IOCTL_DRAIN:
2565 return snd_pcm_drain(substream, file);
2566 case SNDRV_PCM_IOCTL_DROP:
2567 return snd_pcm_drop(substream);
2568 case SNDRV_PCM_IOCTL_PAUSE:
2569 {
2570 int res;
2571 snd_pcm_stream_lock_irq(substream);
2572 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2573 snd_pcm_stream_unlock_irq(substream);
2574 return res;
2575 }
2576 }
2577 snd_printd("unknown ioctl = 0x%x\n", cmd);
2578 return -ENOTTY;
2579 }
2580
2581 static int snd_pcm_playback_ioctl1(struct file *file,
2582 struct snd_pcm_substream *substream,
2583 unsigned int cmd, void __user *arg)
2584 {
2585 if (snd_BUG_ON(!substream))
2586 return -ENXIO;
2587 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2588 return -EINVAL;
2589 switch (cmd) {
2590 case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2591 {
2592 struct snd_xferi xferi;
2593 struct snd_xferi __user *_xferi = arg;
2594 struct snd_pcm_runtime *runtime = substream->runtime;
2595 snd_pcm_sframes_t result;
2596 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2597 return -EBADFD;
2598 if (put_user(0, &_xferi->result))
2599 return -EFAULT;
2600 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2601 return -EFAULT;
2602 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2603 __put_user(result, &_xferi->result);
2604 return result < 0 ? result : 0;
2605 }
2606 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2607 {
2608 struct snd_xfern xfern;
2609 struct snd_xfern __user *_xfern = arg;
2610 struct snd_pcm_runtime *runtime = substream->runtime;
2611 void __user **bufs;
2612 snd_pcm_sframes_t result;
2613 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2614 return -EBADFD;
2615 if (runtime->channels > 128)
2616 return -EINVAL;
2617 if (put_user(0, &_xfern->result))
2618 return -EFAULT;
2619 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2620 return -EFAULT;
2621
2622 bufs = memdup_user(xfern.bufs,
2623 sizeof(void *) * runtime->channels);
2624 if (IS_ERR(bufs))
2625 return PTR_ERR(bufs);
2626 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2627 kfree(bufs);
2628 __put_user(result, &_xfern->result);
2629 return result < 0 ? result : 0;
2630 }
2631 case SNDRV_PCM_IOCTL_REWIND:
2632 {
2633 snd_pcm_uframes_t frames;
2634 snd_pcm_uframes_t __user *_frames = arg;
2635 snd_pcm_sframes_t result;
2636 if (get_user(frames, _frames))
2637 return -EFAULT;
2638 if (put_user(0, _frames))
2639 return -EFAULT;
2640 result = snd_pcm_playback_rewind(substream, frames);
2641 __put_user(result, _frames);
2642 return result < 0 ? result : 0;
2643 }
2644 case SNDRV_PCM_IOCTL_FORWARD:
2645 {
2646 snd_pcm_uframes_t frames;
2647 snd_pcm_uframes_t __user *_frames = arg;
2648 snd_pcm_sframes_t result;
2649 if (get_user(frames, _frames))
2650 return -EFAULT;
2651 if (put_user(0, _frames))
2652 return -EFAULT;
2653 result = snd_pcm_playback_forward(substream, frames);
2654 __put_user(result, _frames);
2655 return result < 0 ? result : 0;
2656 }
2657 }
2658 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2659 }
2660
2661 static int snd_pcm_capture_ioctl1(struct file *file,
2662 struct snd_pcm_substream *substream,
2663 unsigned int cmd, void __user *arg)
2664 {
2665 if (snd_BUG_ON(!substream))
2666 return -ENXIO;
2667 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2668 return -EINVAL;
2669 switch (cmd) {
2670 case SNDRV_PCM_IOCTL_READI_FRAMES:
2671 {
2672 struct snd_xferi xferi;
2673 struct snd_xferi __user *_xferi = arg;
2674 struct snd_pcm_runtime *runtime = substream->runtime;
2675 snd_pcm_sframes_t result;
2676 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2677 return -EBADFD;
2678 if (put_user(0, &_xferi->result))
2679 return -EFAULT;
2680 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2681 return -EFAULT;
2682 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2683 __put_user(result, &_xferi->result);
2684 return result < 0 ? result : 0;
2685 }
2686 case SNDRV_PCM_IOCTL_READN_FRAMES:
2687 {
2688 struct snd_xfern xfern;
2689 struct snd_xfern __user *_xfern = arg;
2690 struct snd_pcm_runtime *runtime = substream->runtime;
2691 void *bufs;
2692 snd_pcm_sframes_t result;
2693 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2694 return -EBADFD;
2695 if (runtime->channels > 128)
2696 return -EINVAL;
2697 if (put_user(0, &_xfern->result))
2698 return -EFAULT;
2699 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2700 return -EFAULT;
2701
2702 bufs = memdup_user(xfern.bufs,
2703 sizeof(void *) * runtime->channels);
2704 if (IS_ERR(bufs))
2705 return PTR_ERR(bufs);
2706 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2707 kfree(bufs);
2708 __put_user(result, &_xfern->result);
2709 return result < 0 ? result : 0;
2710 }
2711 case SNDRV_PCM_IOCTL_REWIND:
2712 {
2713 snd_pcm_uframes_t frames;
2714 snd_pcm_uframes_t __user *_frames = arg;
2715 snd_pcm_sframes_t result;
2716 if (get_user(frames, _frames))
2717 return -EFAULT;
2718 if (put_user(0, _frames))
2719 return -EFAULT;
2720 result = snd_pcm_capture_rewind(substream, frames);
2721 __put_user(result, _frames);
2722 return result < 0 ? result : 0;
2723 }
2724 case SNDRV_PCM_IOCTL_FORWARD:
2725 {
2726 snd_pcm_uframes_t frames;
2727 snd_pcm_uframes_t __user *_frames = arg;
2728 snd_pcm_sframes_t result;
2729 if (get_user(frames, _frames))
2730 return -EFAULT;
2731 if (put_user(0, _frames))
2732 return -EFAULT;
2733 result = snd_pcm_capture_forward(substream, frames);
2734 __put_user(result, _frames);
2735 return result < 0 ? result : 0;
2736 }
2737 }
2738 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2739 }
2740
2741 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2742 unsigned long arg)
2743 {
2744 struct snd_pcm_file *pcm_file;
2745
2746 pcm_file = file->private_data;
2747
2748 if (((cmd >> 8) & 0xff) != 'A')
2749 return -ENOTTY;
2750
2751 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2752 (void __user *)arg);
2753 }
2754
2755 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2756 unsigned long arg)
2757 {
2758 struct snd_pcm_file *pcm_file;
2759
2760 pcm_file = file->private_data;
2761
2762 if (((cmd >> 8) & 0xff) != 'A')
2763 return -ENOTTY;
2764
2765 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2766 (void __user *)arg);
2767 }
2768
2769 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2770 unsigned int cmd, void *arg)
2771 {
2772 mm_segment_t fs;
2773 int result;
2774
2775 fs = snd_enter_user();
2776 switch (substream->stream) {
2777 case SNDRV_PCM_STREAM_PLAYBACK:
2778 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2779 (void __user *)arg);
2780 break;
2781 case SNDRV_PCM_STREAM_CAPTURE:
2782 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2783 (void __user *)arg);
2784 break;
2785 default:
2786 result = -EINVAL;
2787 break;
2788 }
2789 snd_leave_user(fs);
2790 return result;
2791 }
2792
2793 EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2794
2795 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2796 loff_t * offset)
2797 {
2798 struct snd_pcm_file *pcm_file;
2799 struct snd_pcm_substream *substream;
2800 struct snd_pcm_runtime *runtime;
2801 snd_pcm_sframes_t result;
2802
2803 pcm_file = file->private_data;
2804 substream = pcm_file->substream;
2805 if (PCM_RUNTIME_CHECK(substream))
2806 return -ENXIO;
2807 runtime = substream->runtime;
2808 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2809 return -EBADFD;
2810 if (!frame_aligned(runtime, count))
2811 return -EINVAL;
2812 count = bytes_to_frames(runtime, count);
2813 result = snd_pcm_lib_read(substream, buf, count);
2814 if (result > 0)
2815 result = frames_to_bytes(runtime, result);
2816 return result;
2817 }
2818
2819 static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2820 size_t count, loff_t * offset)
2821 {
2822 struct snd_pcm_file *pcm_file;
2823 struct snd_pcm_substream *substream;
2824 struct snd_pcm_runtime *runtime;
2825 snd_pcm_sframes_t result;
2826
2827 pcm_file = file->private_data;
2828 substream = pcm_file->substream;
2829 if (PCM_RUNTIME_CHECK(substream))
2830 return -ENXIO;
2831 runtime = substream->runtime;
2832 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2833 return -EBADFD;
2834 if (!frame_aligned(runtime, count))
2835 return -EINVAL;
2836 count = bytes_to_frames(runtime, count);
2837 result = snd_pcm_lib_write(substream, buf, count);
2838 if (result > 0)
2839 result = frames_to_bytes(runtime, result);
2840 return result;
2841 }
2842
2843 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
2844 unsigned long nr_segs, loff_t pos)
2845
2846 {
2847 struct snd_pcm_file *pcm_file;
2848 struct snd_pcm_substream *substream;
2849 struct snd_pcm_runtime *runtime;
2850 snd_pcm_sframes_t result;
2851 unsigned long i;
2852 void __user **bufs;
2853 snd_pcm_uframes_t frames;
2854
2855 pcm_file = iocb->ki_filp->private_data;
2856 substream = pcm_file->substream;
2857 if (PCM_RUNTIME_CHECK(substream))
2858 return -ENXIO;
2859 runtime = substream->runtime;
2860 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2861 return -EBADFD;
2862 if (nr_segs > 1024 || nr_segs != runtime->channels)
2863 return -EINVAL;
2864 if (!frame_aligned(runtime, iov->iov_len))
2865 return -EINVAL;
2866 frames = bytes_to_samples(runtime, iov->iov_len);
2867 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2868 if (bufs == NULL)
2869 return -ENOMEM;
2870 for (i = 0; i < nr_segs; ++i)
2871 bufs[i] = iov[i].iov_base;
2872 result = snd_pcm_lib_readv(substream, bufs, frames);
2873 if (result > 0)
2874 result = frames_to_bytes(runtime, result);
2875 kfree(bufs);
2876 return result;
2877 }
2878
2879 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
2880 unsigned long nr_segs, loff_t pos)
2881 {
2882 struct snd_pcm_file *pcm_file;
2883 struct snd_pcm_substream *substream;
2884 struct snd_pcm_runtime *runtime;
2885 snd_pcm_sframes_t result;
2886 unsigned long i;
2887 void __user **bufs;
2888 snd_pcm_uframes_t frames;
2889
2890 pcm_file = iocb->ki_filp->private_data;
2891 substream = pcm_file->substream;
2892 if (PCM_RUNTIME_CHECK(substream))
2893 return -ENXIO;
2894 runtime = substream->runtime;
2895 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2896 return -EBADFD;
2897 if (nr_segs > 128 || nr_segs != runtime->channels ||
2898 !frame_aligned(runtime, iov->iov_len))
2899 return -EINVAL;
2900 frames = bytes_to_samples(runtime, iov->iov_len);
2901 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2902 if (bufs == NULL)
2903 return -ENOMEM;
2904 for (i = 0; i < nr_segs; ++i)
2905 bufs[i] = iov[i].iov_base;
2906 result = snd_pcm_lib_writev(substream, bufs, frames);
2907 if (result > 0)
2908 result = frames_to_bytes(runtime, result);
2909 kfree(bufs);
2910 return result;
2911 }
2912
2913 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2914 {
2915 struct snd_pcm_file *pcm_file;
2916 struct snd_pcm_substream *substream;
2917 struct snd_pcm_runtime *runtime;
2918 unsigned int mask;
2919 snd_pcm_uframes_t avail;
2920
2921 pcm_file = file->private_data;
2922
2923 substream = pcm_file->substream;
2924 if (PCM_RUNTIME_CHECK(substream))
2925 return -ENXIO;
2926 runtime = substream->runtime;
2927
2928 poll_wait(file, &runtime->sleep, wait);
2929
2930 snd_pcm_stream_lock_irq(substream);
2931 avail = snd_pcm_playback_avail(runtime);
2932 switch (runtime->status->state) {
2933 case SNDRV_PCM_STATE_RUNNING:
2934 case SNDRV_PCM_STATE_PREPARED:
2935 case SNDRV_PCM_STATE_PAUSED:
2936 if (avail >= runtime->control->avail_min) {
2937 mask = POLLOUT | POLLWRNORM;
2938 break;
2939 }
2940 /* Fall through */
2941 case SNDRV_PCM_STATE_DRAINING:
2942 mask = 0;
2943 break;
2944 default:
2945 mask = POLLOUT | POLLWRNORM | POLLERR;
2946 break;
2947 }
2948 snd_pcm_stream_unlock_irq(substream);
2949 return mask;
2950 }
2951
2952 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2953 {
2954 struct snd_pcm_file *pcm_file;
2955 struct snd_pcm_substream *substream;
2956 struct snd_pcm_runtime *runtime;
2957 unsigned int mask;
2958 snd_pcm_uframes_t avail;
2959
2960 pcm_file = file->private_data;
2961
2962 substream = pcm_file->substream;
2963 if (PCM_RUNTIME_CHECK(substream))
2964 return -ENXIO;
2965 runtime = substream->runtime;
2966
2967 poll_wait(file, &runtime->sleep, wait);
2968
2969 snd_pcm_stream_lock_irq(substream);
2970 avail = snd_pcm_capture_avail(runtime);
2971 switch (runtime->status->state) {
2972 case SNDRV_PCM_STATE_RUNNING:
2973 case SNDRV_PCM_STATE_PREPARED:
2974 case SNDRV_PCM_STATE_PAUSED:
2975 if (avail >= runtime->control->avail_min) {
2976 mask = POLLIN | POLLRDNORM;
2977 break;
2978 }
2979 mask = 0;
2980 break;
2981 case SNDRV_PCM_STATE_DRAINING:
2982 if (avail > 0) {
2983 mask = POLLIN | POLLRDNORM;
2984 break;
2985 }
2986 /* Fall through */
2987 default:
2988 mask = POLLIN | POLLRDNORM | POLLERR;
2989 break;
2990 }
2991 snd_pcm_stream_unlock_irq(substream);
2992 return mask;
2993 }
2994
2995 /*
2996 * mmap support
2997 */
2998
2999 /*
3000 * Only on coherent architectures, we can mmap the status and the control records
3001 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
3002 */
3003 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3004 /*
3005 * mmap status record
3006 */
3007 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
3008 struct vm_fault *vmf)
3009 {
3010 struct snd_pcm_substream *substream = area->vm_private_data;
3011 struct snd_pcm_runtime *runtime;
3012
3013 if (substream == NULL)
3014 return VM_FAULT_SIGBUS;
3015 runtime = substream->runtime;
3016 vmf->page = virt_to_page(runtime->status);
3017 get_page(vmf->page);
3018 return 0;
3019 }
3020
3021 static struct vm_operations_struct snd_pcm_vm_ops_status =
3022 {
3023 .fault = snd_pcm_mmap_status_fault,
3024 };
3025
3026 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3027 struct vm_area_struct *area)
3028 {
3029 struct snd_pcm_runtime *runtime;
3030 long size;
3031 if (!(area->vm_flags & VM_READ))
3032 return -EINVAL;
3033 runtime = substream->runtime;
3034 size = area->vm_end - area->vm_start;
3035 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3036 return -EINVAL;
3037 area->vm_ops = &snd_pcm_vm_ops_status;
3038 area->vm_private_data = substream;
3039 area->vm_flags |= VM_RESERVED;
3040 return 0;
3041 }
3042
3043 /*
3044 * mmap control record
3045 */
3046 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3047 struct vm_fault *vmf)
3048 {
3049 struct snd_pcm_substream *substream = area->vm_private_data;
3050 struct snd_pcm_runtime *runtime;
3051
3052 if (substream == NULL)
3053 return VM_FAULT_SIGBUS;
3054 runtime = substream->runtime;
3055 vmf->page = virt_to_page(runtime->control);
3056 get_page(vmf->page);
3057 return 0;
3058 }
3059
3060 static struct vm_operations_struct snd_pcm_vm_ops_control =
3061 {
3062 .fault = snd_pcm_mmap_control_fault,
3063 };
3064
3065 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3066 struct vm_area_struct *area)
3067 {
3068 struct snd_pcm_runtime *runtime;
3069 long size;
3070 if (!(area->vm_flags & VM_READ))
3071 return -EINVAL;
3072 runtime = substream->runtime;
3073 size = area->vm_end - area->vm_start;
3074 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3075 return -EINVAL;
3076 area->vm_ops = &snd_pcm_vm_ops_control;
3077 area->vm_private_data = substream;
3078 area->vm_flags |= VM_RESERVED;
3079 return 0;
3080 }
3081 #else /* ! coherent mmap */
3082 /*
3083 * don't support mmap for status and control records.
3084 */
3085 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3086 struct vm_area_struct *area)
3087 {
3088 return -ENXIO;
3089 }
3090 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3091 struct vm_area_struct *area)
3092 {
3093 return -ENXIO;
3094 }
3095 #endif /* coherent mmap */
3096
3097 /*
3098 * fault callback for mmapping a RAM page
3099 */
3100 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3101 struct vm_fault *vmf)
3102 {
3103 struct snd_pcm_substream *substream = area->vm_private_data;
3104 struct snd_pcm_runtime *runtime;
3105 unsigned long offset;
3106 struct page * page;
3107 void *vaddr;
3108 size_t dma_bytes;
3109
3110 if (substream == NULL)
3111 return VM_FAULT_SIGBUS;
3112 runtime = substream->runtime;
3113 offset = vmf->pgoff << PAGE_SHIFT;
3114 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3115 if (offset > dma_bytes - PAGE_SIZE)
3116 return VM_FAULT_SIGBUS;
3117 if (substream->ops->page) {
3118 page = substream->ops->page(substream, offset);
3119 if (!page)
3120 return VM_FAULT_SIGBUS;
3121 } else {
3122 vaddr = runtime->dma_area + offset;
3123 page = virt_to_page(vaddr);
3124 }
3125 get_page(page);
3126 vmf->page = page;
3127 return 0;
3128 }
3129
3130 static struct vm_operations_struct snd_pcm_vm_ops_data =
3131 {
3132 .open = snd_pcm_mmap_data_open,
3133 .close = snd_pcm_mmap_data_close,
3134 .fault = snd_pcm_mmap_data_fault,
3135 };
3136
3137 /*
3138 * mmap the DMA buffer on RAM
3139 */
3140 static int snd_pcm_default_mmap(struct snd_pcm_substream *substream,
3141 struct vm_area_struct *area)
3142 {
3143 area->vm_ops = &snd_pcm_vm_ops_data;
3144 area->vm_private_data = substream;
3145 area->vm_flags |= VM_RESERVED;
3146 atomic_inc(&substream->mmap_count);
3147 return 0;
3148 }
3149
3150 /*
3151 * mmap the DMA buffer on I/O memory area
3152 */
3153 #if SNDRV_PCM_INFO_MMAP_IOMEM
3154 static struct vm_operations_struct snd_pcm_vm_ops_data_mmio =
3155 {
3156 .open = snd_pcm_mmap_data_open,
3157 .close = snd_pcm_mmap_data_close,
3158 };
3159
3160 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3161 struct vm_area_struct *area)
3162 {
3163 long size;
3164 unsigned long offset;
3165
3166 #ifdef pgprot_noncached
3167 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3168 #endif
3169 area->vm_ops = &snd_pcm_vm_ops_data_mmio;
3170 area->vm_private_data = substream;
3171 area->vm_flags |= VM_IO;
3172 size = area->vm_end - area->vm_start;
3173 offset = area->vm_pgoff << PAGE_SHIFT;
3174 if (io_remap_pfn_range(area, area->vm_start,
3175 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3176 size, area->vm_page_prot))
3177 return -EAGAIN;
3178 atomic_inc(&substream->mmap_count);
3179 return 0;
3180 }
3181
3182 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3183 #endif /* SNDRV_PCM_INFO_MMAP */
3184
3185 /*
3186 * mmap DMA buffer
3187 */
3188 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3189 struct vm_area_struct *area)
3190 {
3191 struct snd_pcm_runtime *runtime;
3192 long size;
3193 unsigned long offset;
3194 size_t dma_bytes;
3195
3196 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3197 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3198 return -EINVAL;
3199 } else {
3200 if (!(area->vm_flags & VM_READ))
3201 return -EINVAL;
3202 }
3203 runtime = substream->runtime;
3204 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3205 return -EBADFD;
3206 if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3207 return -ENXIO;
3208 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3209 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3210 return -EINVAL;
3211 size = area->vm_end - area->vm_start;
3212 offset = area->vm_pgoff << PAGE_SHIFT;
3213 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3214 if ((size_t)size > dma_bytes)
3215 return -EINVAL;
3216 if (offset > dma_bytes - size)
3217 return -EINVAL;
3218
3219 if (substream->ops->mmap)
3220 return substream->ops->mmap(substream, area);
3221 else
3222 return snd_pcm_default_mmap(substream, area);
3223 }
3224
3225 EXPORT_SYMBOL(snd_pcm_mmap_data);
3226
3227 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3228 {
3229 struct snd_pcm_file * pcm_file;
3230 struct snd_pcm_substream *substream;
3231 unsigned long offset;
3232
3233 pcm_file = file->private_data;
3234 substream = pcm_file->substream;
3235 if (PCM_RUNTIME_CHECK(substream))
3236 return -ENXIO;
3237
3238 offset = area->vm_pgoff << PAGE_SHIFT;
3239 switch (offset) {
3240 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3241 if (pcm_file->no_compat_mmap)
3242 return -ENXIO;
3243 return snd_pcm_mmap_status(substream, file, area);
3244 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3245 if (pcm_file->no_compat_mmap)
3246 return -ENXIO;
3247 return snd_pcm_mmap_control(substream, file, area);
3248 default:
3249 return snd_pcm_mmap_data(substream, file, area);
3250 }
3251 return 0;
3252 }
3253
3254 static int snd_pcm_fasync(int fd, struct file * file, int on)
3255 {
3256 struct snd_pcm_file * pcm_file;
3257 struct snd_pcm_substream *substream;
3258 struct snd_pcm_runtime *runtime;
3259 int err = -ENXIO;
3260
3261 lock_kernel();
3262 pcm_file = file->private_data;
3263 substream = pcm_file->substream;
3264 if (PCM_RUNTIME_CHECK(substream))
3265 goto out;
3266 runtime = substream->runtime;
3267 err = fasync_helper(fd, file, on, &runtime->fasync);
3268 out:
3269 unlock_kernel();
3270 return err;
3271 }
3272
3273 /*
3274 * ioctl32 compat
3275 */
3276 #ifdef CONFIG_COMPAT
3277 #include "pcm_compat.c"
3278 #else
3279 #define snd_pcm_ioctl_compat NULL
3280 #endif
3281
3282 /*
3283 * To be removed helpers to keep binary compatibility
3284 */
3285
3286 #ifdef CONFIG_SND_SUPPORT_OLD_API
3287 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3288 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3289
3290 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3291 struct snd_pcm_hw_params_old *oparams)
3292 {
3293 unsigned int i;
3294
3295 memset(params, 0, sizeof(*params));
3296 params->flags = oparams->flags;
3297 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3298 params->masks[i].bits[0] = oparams->masks[i];
3299 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3300 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3301 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3302 params->info = oparams->info;
3303 params->msbits = oparams->msbits;
3304 params->rate_num = oparams->rate_num;
3305 params->rate_den = oparams->rate_den;
3306 params->fifo_size = oparams->fifo_size;
3307 }
3308
3309 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3310 struct snd_pcm_hw_params *params)
3311 {
3312 unsigned int i;
3313
3314 memset(oparams, 0, sizeof(*oparams));
3315 oparams->flags = params->flags;
3316 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3317 oparams->masks[i] = params->masks[i].bits[0];
3318 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3319 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3320 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3321 oparams->info = params->info;
3322 oparams->msbits = params->msbits;
3323 oparams->rate_num = params->rate_num;
3324 oparams->rate_den = params->rate_den;
3325 oparams->fifo_size = params->fifo_size;
3326 }
3327
3328 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3329 struct snd_pcm_hw_params_old __user * _oparams)
3330 {
3331 struct snd_pcm_hw_params *params;
3332 struct snd_pcm_hw_params_old *oparams = NULL;
3333 int err;
3334
3335 params = kmalloc(sizeof(*params), GFP_KERNEL);
3336 if (!params)
3337 return -ENOMEM;
3338
3339 oparams = memdup_user(_oparams, sizeof(*oparams));
3340 if (IS_ERR(oparams)) {
3341 err = PTR_ERR(oparams);
3342 goto out;
3343 }
3344 snd_pcm_hw_convert_from_old_params(params, oparams);
3345 err = snd_pcm_hw_refine(substream, params);
3346 snd_pcm_hw_convert_to_old_params(oparams, params);
3347 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3348 if (!err)
3349 err = -EFAULT;
3350 }
3351
3352 kfree(oparams);
3353 out:
3354 kfree(params);
3355 return err;
3356 }
3357
3358 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3359 struct snd_pcm_hw_params_old __user * _oparams)
3360 {
3361 struct snd_pcm_hw_params *params;
3362 struct snd_pcm_hw_params_old *oparams = NULL;
3363 int err;
3364
3365 params = kmalloc(sizeof(*params), GFP_KERNEL);
3366 if (!params)
3367 return -ENOMEM;
3368
3369 oparams = memdup_user(_oparams, sizeof(*oparams));
3370 if (IS_ERR(oparams)) {
3371 err = PTR_ERR(oparams);
3372 goto out;
3373 }
3374 snd_pcm_hw_convert_from_old_params(params, oparams);
3375 err = snd_pcm_hw_params(substream, params);
3376 snd_pcm_hw_convert_to_old_params(oparams, params);
3377 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3378 if (!err)
3379 err = -EFAULT;
3380 }
3381
3382 kfree(oparams);
3383 out:
3384 kfree(params);
3385 return err;
3386 }
3387 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3388
3389 #ifndef CONFIG_MMU
3390 unsigned long dummy_get_unmapped_area(struct file *file, unsigned long addr,
3391 unsigned long len, unsigned long pgoff,
3392 unsigned long flags)
3393 {
3394 return 0;
3395 }
3396 #else
3397 # define dummy_get_unmapped_area NULL
3398 #endif
3399
3400 /*
3401 * Register section
3402 */
3403
3404 const struct file_operations snd_pcm_f_ops[2] = {
3405 {
3406 .owner = THIS_MODULE,
3407 .write = snd_pcm_write,
3408 .aio_write = snd_pcm_aio_write,
3409 .open = snd_pcm_playback_open,
3410 .release = snd_pcm_release,
3411 .poll = snd_pcm_playback_poll,
3412 .unlocked_ioctl = snd_pcm_playback_ioctl,
3413 .compat_ioctl = snd_pcm_ioctl_compat,
3414 .mmap = snd_pcm_mmap,
3415 .fasync = snd_pcm_fasync,
3416 .get_unmapped_area = dummy_get_unmapped_area,
3417 },
3418 {
3419 .owner = THIS_MODULE,
3420 .read = snd_pcm_read,
3421 .aio_read = snd_pcm_aio_read,
3422 .open = snd_pcm_capture_open,
3423 .release = snd_pcm_release,
3424 .poll = snd_pcm_capture_poll,
3425 .unlocked_ioctl = snd_pcm_capture_ioctl,
3426 .compat_ioctl = snd_pcm_ioctl_compat,
3427 .mmap = snd_pcm_mmap,
3428 .fasync = snd_pcm_fasync,
3429 .get_unmapped_area = dummy_get_unmapped_area,
3430 }
3431 };
Linux with added FPC-III support