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powerpc: clean up bug.h further
[linux-2.6/btrfs-unstable.git] / sound / core / pcm_native.c
blobe97b2d162cc72f3140792ec9725bf71078011183
1 /*
2 * Digital Audio (PCM) abstract layer
3 * Copyright (c) by Jaroslav Kysela <perex@suse.cz>
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
22 #include <sound/driver.h>
23 #include <linux/mm.h>
24 #include <linux/smp_lock.h>
25 #include <linux/file.h>
26 #include <linux/slab.h>
27 #include <linux/time.h>
28 #include <linux/uio.h>
29 #include <sound/core.h>
30 #include <sound/control.h>
31 #include <sound/info.h>
32 #include <sound/pcm.h>
33 #include <sound/pcm_params.h>
34 #include <sound/timer.h>
35 #include <sound/minors.h>
36 #include <asm/io.h>
37
38 /*
39 * Compatibility
40 */
41
42 struct sndrv_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 sndrv_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 sndrv_pcm_uframes_t fifo_size;
55 unsigned char reserved[64];
56 };
57
58 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct sndrv_pcm_hw_params_old)
59 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct sndrv_pcm_hw_params_old)
60
61 static int snd_pcm_hw_refine_old_user(snd_pcm_substream_t * substream, struct sndrv_pcm_hw_params_old __user * _oparams);
62 static int snd_pcm_hw_params_old_user(snd_pcm_substream_t * substream, struct sndrv_pcm_hw_params_old __user * _oparams);
63
64 /*
65 *
66 */
67
68 DEFINE_RWLOCK(snd_pcm_link_rwlock);
69 static DECLARE_RWSEM(snd_pcm_link_rwsem);
70
71
72 static inline mm_segment_t snd_enter_user(void)
73 {
74 mm_segment_t fs = get_fs();
75 set_fs(get_ds());
76 return fs;
77 }
78
79 static inline void snd_leave_user(mm_segment_t fs)
80 {
81 set_fs(fs);
82 }
83
84
85
86 int snd_pcm_info(snd_pcm_substream_t * substream, snd_pcm_info_t *info)
87 {
88 snd_pcm_runtime_t * runtime;
89 snd_pcm_t *pcm = substream->pcm;
90 snd_pcm_str_t *pstr = substream->pstr;
91
92 snd_assert(substream != NULL, return -ENXIO);
93 memset(info, 0, sizeof(*info));
94 info->card = pcm->card->number;
95 info->device = pcm->device;
96 info->stream = substream->stream;
97 info->subdevice = substream->number;
98 strlcpy(info->id, pcm->id, sizeof(info->id));
99 strlcpy(info->name, pcm->name, sizeof(info->name));
100 info->dev_class = pcm->dev_class;
101 info->dev_subclass = pcm->dev_subclass;
102 info->subdevices_count = pstr->substream_count;
103 info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
104 strlcpy(info->subname, substream->name, sizeof(info->subname));
105 runtime = substream->runtime;
106 /* AB: FIXME!!! This is definitely nonsense */
107 if (runtime) {
108 info->sync = runtime->sync;
109 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
110 }
111 return 0;
112 }
113
114 int snd_pcm_info_user(snd_pcm_substream_t * substream, snd_pcm_info_t __user * _info)
115 {
116 snd_pcm_info_t *info;
117 int err;
118
119 info = kmalloc(sizeof(*info), GFP_KERNEL);
120 if (! info)
121 return -ENOMEM;
122 err = snd_pcm_info(substream, info);
123 if (err >= 0) {
124 if (copy_to_user(_info, info, sizeof(*info)))
125 err = -EFAULT;
126 }
127 kfree(info);
128 return err;
129 }
130
131 #undef RULES_DEBUG
132
133 #ifdef RULES_DEBUG
134 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
135 char *snd_pcm_hw_param_names[] = {
136 HW_PARAM(ACCESS),
137 HW_PARAM(FORMAT),
138 HW_PARAM(SUBFORMAT),
139 HW_PARAM(SAMPLE_BITS),
140 HW_PARAM(FRAME_BITS),
141 HW_PARAM(CHANNELS),
142 HW_PARAM(RATE),
143 HW_PARAM(PERIOD_TIME),
144 HW_PARAM(PERIOD_SIZE),
145 HW_PARAM(PERIOD_BYTES),
146 HW_PARAM(PERIODS),
147 HW_PARAM(BUFFER_TIME),
148 HW_PARAM(BUFFER_SIZE),
149 HW_PARAM(BUFFER_BYTES),
150 HW_PARAM(TICK_TIME),
151 };
152 #endif
153
154 int snd_pcm_hw_refine(snd_pcm_substream_t *substream,
155 snd_pcm_hw_params_t *params)
156 {
157 unsigned int k;
158 snd_pcm_hardware_t *hw;
159 snd_interval_t *i = NULL;
160 snd_mask_t *m = NULL;
161 snd_pcm_hw_constraints_t *constrs = &substream->runtime->hw_constraints;
162 unsigned int rstamps[constrs->rules_num];
163 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
164 unsigned int stamp = 2;
165 int changed, again;
166
167 params->info = 0;
168 params->fifo_size = 0;
169 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
170 params->msbits = 0;
171 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
172 params->rate_num = 0;
173 params->rate_den = 0;
174 }
175
176 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
177 m = hw_param_mask(params, k);
178 if (snd_mask_empty(m))
179 return -EINVAL;
180 if (!(params->rmask & (1 << k)))
181 continue;
182 #ifdef RULES_DEBUG
183 printk("%s = ", snd_pcm_hw_param_names[k]);
184 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
185 #endif
186 changed = snd_mask_refine(m, constrs_mask(constrs, k));
187 #ifdef RULES_DEBUG
188 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
189 #endif
190 if (changed)
191 params->cmask |= 1 << k;
192 if (changed < 0)
193 return changed;
194 }
195
196 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
197 i = hw_param_interval(params, k);
198 if (snd_interval_empty(i))
199 return -EINVAL;
200 if (!(params->rmask & (1 << k)))
201 continue;
202 #ifdef RULES_DEBUG
203 printk("%s = ", snd_pcm_hw_param_names[k]);
204 if (i->empty)
205 printk("empty");
206 else
207 printk("%c%u %u%c",
208 i->openmin ? '(' : '[', i->min,
209 i->max, i->openmax ? ')' : ']');
210 printk(" -> ");
211 #endif
212 changed = snd_interval_refine(i, constrs_interval(constrs, k));
213 #ifdef RULES_DEBUG
214 if (i->empty)
215 printk("empty\n");
216 else
217 printk("%c%u %u%c\n",
218 i->openmin ? '(' : '[', i->min,
219 i->max, i->openmax ? ')' : ']');
220 #endif
221 if (changed)
222 params->cmask |= 1 << k;
223 if (changed < 0)
224 return changed;
225 }
226
227 for (k = 0; k < constrs->rules_num; k++)
228 rstamps[k] = 0;
229 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
230 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
231 do {
232 again = 0;
233 for (k = 0; k < constrs->rules_num; k++) {
234 snd_pcm_hw_rule_t *r = &constrs->rules[k];
235 unsigned int d;
236 int doit = 0;
237 if (r->cond && !(r->cond & params->flags))
238 continue;
239 for (d = 0; r->deps[d] >= 0; d++) {
240 if (vstamps[r->deps[d]] > rstamps[k]) {
241 doit = 1;
242 break;
243 }
244 }
245 if (!doit)
246 continue;
247 #ifdef RULES_DEBUG
248 printk("Rule %d [%p]: ", k, r->func);
249 if (r->var >= 0) {
250 printk("%s = ", snd_pcm_hw_param_names[r->var]);
251 if (hw_is_mask(r->var)) {
252 m = hw_param_mask(params, r->var);
253 printk("%x", *m->bits);
254 } else {
255 i = hw_param_interval(params, r->var);
256 if (i->empty)
257 printk("empty");
258 else
259 printk("%c%u %u%c",
260 i->openmin ? '(' : '[', i->min,
261 i->max, i->openmax ? ')' : ']');
262 }
263 }
264 #endif
265 changed = r->func(params, r);
266 #ifdef RULES_DEBUG
267 if (r->var >= 0) {
268 printk(" -> ");
269 if (hw_is_mask(r->var))
270 printk("%x", *m->bits);
271 else {
272 if (i->empty)
273 printk("empty");
274 else
275 printk("%c%u %u%c",
276 i->openmin ? '(' : '[', i->min,
277 i->max, i->openmax ? ')' : ']');
278 }
279 }
280 printk("\n");
281 #endif
282 rstamps[k] = stamp;
283 if (changed && r->var >= 0) {
284 params->cmask |= (1 << r->var);
285 vstamps[r->var] = stamp;
286 again = 1;
287 }
288 if (changed < 0)
289 return changed;
290 stamp++;
291 }
292 } while (again);
293 if (!params->msbits) {
294 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
295 if (snd_interval_single(i))
296 params->msbits = snd_interval_value(i);
297 }
298
299 if (!params->rate_den) {
300 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
301 if (snd_interval_single(i)) {
302 params->rate_num = snd_interval_value(i);
303 params->rate_den = 1;
304 }
305 }
306
307 hw = &substream->runtime->hw;
308 if (!params->info)
309 params->info = hw->info;
310 if (!params->fifo_size)
311 params->fifo_size = hw->fifo_size;
312 params->rmask = 0;
313 return 0;
314 }
315
316 static int snd_pcm_hw_refine_user(snd_pcm_substream_t * substream, snd_pcm_hw_params_t __user * _params)
317 {
318 snd_pcm_hw_params_t *params;
319 int err;
320
321 params = kmalloc(sizeof(*params), GFP_KERNEL);
322 if (!params) {
323 err = -ENOMEM;
324 goto out;
325 }
326 if (copy_from_user(params, _params, sizeof(*params))) {
327 err = -EFAULT;
328 goto out;
329 }
330 err = snd_pcm_hw_refine(substream, params);
331 if (copy_to_user(_params, params, sizeof(*params))) {
332 if (!err)
333 err = -EFAULT;
334 }
335 out:
336 kfree(params);
337 return err;
338 }
339
340 static int snd_pcm_hw_params(snd_pcm_substream_t *substream,
341 snd_pcm_hw_params_t *params)
342 {
343 snd_pcm_runtime_t *runtime;
344 int err;
345 unsigned int bits;
346 snd_pcm_uframes_t frames;
347
348 snd_assert(substream != NULL, return -ENXIO);
349 runtime = substream->runtime;
350 snd_assert(runtime != NULL, return -ENXIO);
351 snd_pcm_stream_lock_irq(substream);
352 switch (runtime->status->state) {
353 case SNDRV_PCM_STATE_OPEN:
354 case SNDRV_PCM_STATE_SETUP:
355 case SNDRV_PCM_STATE_PREPARED:
356 break;
357 default:
358 snd_pcm_stream_unlock_irq(substream);
359 return -EBADFD;
360 }
361 snd_pcm_stream_unlock_irq(substream);
362 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
363 if (!substream->oss.oss)
364 #endif
365 if (atomic_read(&runtime->mmap_count))
366 return -EBADFD;
367
368 params->rmask = ~0U;
369 err = snd_pcm_hw_refine(substream, params);
370 if (err < 0)
371 goto _error;
372
373 err = snd_pcm_hw_params_choose(substream, params);
374 if (err < 0)
375 goto _error;
376
377 if (substream->ops->hw_params != NULL) {
378 err = substream->ops->hw_params(substream, params);
379 if (err < 0)
380 goto _error;
381 }
382
383 runtime->access = params_access(params);
384 runtime->format = params_format(params);
385 runtime->subformat = params_subformat(params);
386 runtime->channels = params_channels(params);
387 runtime->rate = params_rate(params);
388 runtime->period_size = params_period_size(params);
389 runtime->periods = params_periods(params);
390 runtime->buffer_size = params_buffer_size(params);
391 runtime->tick_time = params_tick_time(params);
392 runtime->info = params->info;
393 runtime->rate_num = params->rate_num;
394 runtime->rate_den = params->rate_den;
395
396 bits = snd_pcm_format_physical_width(runtime->format);
397 runtime->sample_bits = bits;
398 bits *= runtime->channels;
399 runtime->frame_bits = bits;
400 frames = 1;
401 while (bits % 8 != 0) {
402 bits *= 2;
403 frames *= 2;
404 }
405 runtime->byte_align = bits / 8;
406 runtime->min_align = frames;
407
408 /* Default sw params */
409 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
410 runtime->period_step = 1;
411 runtime->sleep_min = 0;
412 runtime->control->avail_min = runtime->period_size;
413 runtime->xfer_align = runtime->period_size;
414 runtime->start_threshold = 1;
415 runtime->stop_threshold = runtime->buffer_size;
416 runtime->silence_threshold = 0;
417 runtime->silence_size = 0;
418 runtime->boundary = runtime->buffer_size;
419 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
420 runtime->boundary *= 2;
421
422 snd_pcm_timer_resolution_change(substream);
423 runtime->status->state = SNDRV_PCM_STATE_SETUP;
424 return 0;
425 _error:
426 /* hardware might be unuseable from this time,
427 so we force application to retry to set
428 the correct hardware parameter settings */
429 runtime->status->state = SNDRV_PCM_STATE_OPEN;
430 if (substream->ops->hw_free != NULL)
431 substream->ops->hw_free(substream);
432 return err;
433 }
434
435 static int snd_pcm_hw_params_user(snd_pcm_substream_t * substream, snd_pcm_hw_params_t __user * _params)
436 {
437 snd_pcm_hw_params_t *params;
438 int err;
439
440 params = kmalloc(sizeof(*params), GFP_KERNEL);
441 if (!params) {
442 err = -ENOMEM;
443 goto out;
444 }
445 if (copy_from_user(params, _params, sizeof(*params))) {
446 err = -EFAULT;
447 goto out;
448 }
449 err = snd_pcm_hw_params(substream, params);
450 if (copy_to_user(_params, params, sizeof(*params))) {
451 if (!err)
452 err = -EFAULT;
453 }
454 out:
455 kfree(params);
456 return err;
457 }
458
459 static int snd_pcm_hw_free(snd_pcm_substream_t * substream)
460 {
461 snd_pcm_runtime_t *runtime;
462 int result = 0;
463
464 snd_assert(substream != NULL, return -ENXIO);
465 runtime = substream->runtime;
466 snd_assert(runtime != NULL, return -ENXIO);
467 snd_pcm_stream_lock_irq(substream);
468 switch (runtime->status->state) {
469 case SNDRV_PCM_STATE_SETUP:
470 case SNDRV_PCM_STATE_PREPARED:
471 break;
472 default:
473 snd_pcm_stream_unlock_irq(substream);
474 return -EBADFD;
475 }
476 snd_pcm_stream_unlock_irq(substream);
477 if (atomic_read(&runtime->mmap_count))
478 return -EBADFD;
479 if (substream->ops->hw_free)
480 result = substream->ops->hw_free(substream);
481 runtime->status->state = SNDRV_PCM_STATE_OPEN;
482 return result;
483 }
484
485 static int snd_pcm_sw_params(snd_pcm_substream_t * substream, snd_pcm_sw_params_t *params)
486 {
487 snd_pcm_runtime_t *runtime;
488
489 snd_assert(substream != NULL, return -ENXIO);
490 runtime = substream->runtime;
491 snd_assert(runtime != NULL, return -ENXIO);
492 snd_pcm_stream_lock_irq(substream);
493 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
494 snd_pcm_stream_unlock_irq(substream);
495 return -EBADFD;
496 }
497 snd_pcm_stream_unlock_irq(substream);
498
499 if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
500 return -EINVAL;
501 if (params->avail_min == 0)
502 return -EINVAL;
503 if (params->xfer_align == 0 ||
504 params->xfer_align % runtime->min_align != 0)
505 return -EINVAL;
506 if (params->silence_size >= runtime->boundary) {
507 if (params->silence_threshold != 0)
508 return -EINVAL;
509 } else {
510 if (params->silence_size > params->silence_threshold)
511 return -EINVAL;
512 if (params->silence_threshold > runtime->buffer_size)
513 return -EINVAL;
514 }
515 snd_pcm_stream_lock_irq(substream);
516 runtime->tstamp_mode = params->tstamp_mode;
517 runtime->sleep_min = params->sleep_min;
518 runtime->period_step = params->period_step;
519 runtime->control->avail_min = params->avail_min;
520 runtime->start_threshold = params->start_threshold;
521 runtime->stop_threshold = params->stop_threshold;
522 runtime->silence_threshold = params->silence_threshold;
523 runtime->silence_size = params->silence_size;
524 runtime->xfer_align = params->xfer_align;
525 params->boundary = runtime->boundary;
526 if (snd_pcm_running(substream)) {
527 if (runtime->sleep_min)
528 snd_pcm_tick_prepare(substream);
529 else
530 snd_pcm_tick_set(substream, 0);
531 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
532 runtime->silence_size > 0)
533 snd_pcm_playback_silence(substream, ULONG_MAX);
534 wake_up(&runtime->sleep);
535 }
536 snd_pcm_stream_unlock_irq(substream);
537 return 0;
538 }
539
540 static int snd_pcm_sw_params_user(snd_pcm_substream_t * substream, snd_pcm_sw_params_t __user * _params)
541 {
542 snd_pcm_sw_params_t params;
543 int err;
544 if (copy_from_user(&params, _params, sizeof(params)))
545 return -EFAULT;
546 err = snd_pcm_sw_params(substream, &params);
547 if (copy_to_user(_params, &params, sizeof(params)))
548 return -EFAULT;
549 return err;
550 }
551
552 int snd_pcm_status(snd_pcm_substream_t *substream,
553 snd_pcm_status_t *status)
554 {
555 snd_pcm_runtime_t *runtime = substream->runtime;
556
557 snd_pcm_stream_lock_irq(substream);
558 status->state = runtime->status->state;
559 status->suspended_state = runtime->status->suspended_state;
560 if (status->state == SNDRV_PCM_STATE_OPEN)
561 goto _end;
562 status->trigger_tstamp = runtime->trigger_tstamp;
563 if (snd_pcm_running(substream)) {
564 snd_pcm_update_hw_ptr(substream);
565 if (runtime->tstamp_mode & SNDRV_PCM_TSTAMP_MMAP)
566 status->tstamp = runtime->status->tstamp;
567 else
568 snd_timestamp_now(&status->tstamp, runtime->tstamp_timespec);
569 } else
570 snd_timestamp_now(&status->tstamp, runtime->tstamp_timespec);
571 status->appl_ptr = runtime->control->appl_ptr;
572 status->hw_ptr = runtime->status->hw_ptr;
573 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
574 status->avail = snd_pcm_playback_avail(runtime);
575 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
576 runtime->status->state == SNDRV_PCM_STATE_DRAINING)
577 status->delay = runtime->buffer_size - status->avail;
578 else
579 status->delay = 0;
580 } else {
581 status->avail = snd_pcm_capture_avail(runtime);
582 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
583 status->delay = status->avail;
584 else
585 status->delay = 0;
586 }
587 status->avail_max = runtime->avail_max;
588 status->overrange = runtime->overrange;
589 runtime->avail_max = 0;
590 runtime->overrange = 0;
591 _end:
592 snd_pcm_stream_unlock_irq(substream);
593 return 0;
594 }
595
596 static int snd_pcm_status_user(snd_pcm_substream_t * substream, snd_pcm_status_t __user * _status)
597 {
598 snd_pcm_status_t status;
599 snd_pcm_runtime_t *runtime;
600 int res;
601
602 snd_assert(substream != NULL, return -ENXIO);
603 runtime = substream->runtime;
604 memset(&status, 0, sizeof(status));
605 res = snd_pcm_status(substream, &status);
606 if (res < 0)
607 return res;
608 if (copy_to_user(_status, &status, sizeof(status)))
609 return -EFAULT;
610 return 0;
611 }
612
613 static int snd_pcm_channel_info(snd_pcm_substream_t * substream, snd_pcm_channel_info_t * info)
614 {
615 snd_pcm_runtime_t *runtime;
616 unsigned int channel;
617
618 snd_assert(substream != NULL, return -ENXIO);
619 channel = info->channel;
620 runtime = substream->runtime;
621 snd_pcm_stream_lock_irq(substream);
622 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
623 snd_pcm_stream_unlock_irq(substream);
624 return -EBADFD;
625 }
626 snd_pcm_stream_unlock_irq(substream);
627 if (channel >= runtime->channels)
628 return -EINVAL;
629 memset(info, 0, sizeof(*info));
630 info->channel = channel;
631 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
632 }
633
634 static int snd_pcm_channel_info_user(snd_pcm_substream_t * substream, snd_pcm_channel_info_t __user * _info)
635 {
636 snd_pcm_channel_info_t info;
637 int res;
638
639 if (copy_from_user(&info, _info, sizeof(info)))
640 return -EFAULT;
641 res = snd_pcm_channel_info(substream, &info);
642 if (res < 0)
643 return res;
644 if (copy_to_user(_info, &info, sizeof(info)))
645 return -EFAULT;
646 return 0;
647 }
648
649 static void snd_pcm_trigger_tstamp(snd_pcm_substream_t *substream)
650 {
651 snd_pcm_runtime_t *runtime = substream->runtime;
652 if (runtime->trigger_master == NULL)
653 return;
654 if (runtime->trigger_master == substream) {
655 snd_timestamp_now(&runtime->trigger_tstamp, runtime->tstamp_timespec);
656 } else {
657 snd_pcm_trigger_tstamp(runtime->trigger_master);
658 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
659 }
660 runtime->trigger_master = NULL;
661 }
662
663 struct action_ops {
664 int (*pre_action)(snd_pcm_substream_t *substream, int state);
665 int (*do_action)(snd_pcm_substream_t *substream, int state);
666 void (*undo_action)(snd_pcm_substream_t *substream, int state);
667 void (*post_action)(snd_pcm_substream_t *substream, int state);
668 };
669
670 /*
671 * this functions is core for handling of linked stream
672 * Note: the stream state might be changed also on failure
673 * Note2: call with calling stream lock + link lock
674 */
675 static int snd_pcm_action_group(struct action_ops *ops,
676 snd_pcm_substream_t *substream,
677 int state, int do_lock)
678 {
679 struct list_head *pos;
680 snd_pcm_substream_t *s = NULL;
681 snd_pcm_substream_t *s1;
682 int res = 0;
683
684 snd_pcm_group_for_each(pos, substream) {
685 s = snd_pcm_group_substream_entry(pos);
686 if (do_lock && s != substream)
687 spin_lock(&s->self_group.lock);
688 res = ops->pre_action(s, state);
689 if (res < 0)
690 goto _unlock;
691 }
692 snd_pcm_group_for_each(pos, substream) {
693 s = snd_pcm_group_substream_entry(pos);
694 res = ops->do_action(s, state);
695 if (res < 0) {
696 if (ops->undo_action) {
697 snd_pcm_group_for_each(pos, substream) {
698 s1 = snd_pcm_group_substream_entry(pos);
699 if (s1 == s) /* failed stream */
700 break;
701 ops->undo_action(s1, state);
702 }
703 }
704 s = NULL; /* unlock all */
705 goto _unlock;
706 }
707 }
708 snd_pcm_group_for_each(pos, substream) {
709 s = snd_pcm_group_substream_entry(pos);
710 ops->post_action(s, state);
711 }
712 _unlock:
713 if (do_lock) {
714 /* unlock streams */
715 snd_pcm_group_for_each(pos, substream) {
716 s1 = snd_pcm_group_substream_entry(pos);
717 if (s1 != substream)
718 spin_unlock(&s1->self_group.lock);
719 if (s1 == s) /* end */
720 break;
721 }
722 }
723 return res;
724 }
725
726 /*
727 * Note: call with stream lock
728 */
729 static int snd_pcm_action_single(struct action_ops *ops,
730 snd_pcm_substream_t *substream,
731 int state)
732 {
733 int res;
734
735 res = ops->pre_action(substream, state);
736 if (res < 0)
737 return res;
738 res = ops->do_action(substream, state);
739 if (res == 0)
740 ops->post_action(substream, state);
741 else if (ops->undo_action)
742 ops->undo_action(substream, state);
743 return res;
744 }
745
746 /*
747 * Note: call with stream lock
748 */
749 static int snd_pcm_action(struct action_ops *ops,
750 snd_pcm_substream_t *substream,
751 int state)
752 {
753 int res;
754
755 if (snd_pcm_stream_linked(substream)) {
756 if (!spin_trylock(&substream->group->lock)) {
757 spin_unlock(&substream->self_group.lock);
758 spin_lock(&substream->group->lock);
759 spin_lock(&substream->self_group.lock);
760 }
761 res = snd_pcm_action_group(ops, substream, state, 1);
762 spin_unlock(&substream->group->lock);
763 } else {
764 res = snd_pcm_action_single(ops, substream, state);
765 }
766 return res;
767 }
768
769 /*
770 * Note: don't use any locks before
771 */
772 static int snd_pcm_action_lock_irq(struct action_ops *ops,
773 snd_pcm_substream_t *substream,
774 int state)
775 {
776 int res;
777
778 read_lock_irq(&snd_pcm_link_rwlock);
779 if (snd_pcm_stream_linked(substream)) {
780 spin_lock(&substream->group->lock);
781 spin_lock(&substream->self_group.lock);
782 res = snd_pcm_action_group(ops, substream, state, 1);
783 spin_unlock(&substream->self_group.lock);
784 spin_unlock(&substream->group->lock);
785 } else {
786 spin_lock(&substream->self_group.lock);
787 res = snd_pcm_action_single(ops, substream, state);
788 spin_unlock(&substream->self_group.lock);
789 }
790 read_unlock_irq(&snd_pcm_link_rwlock);
791 return res;
792 }
793
794 /*
795 */
796 static int snd_pcm_action_nonatomic(struct action_ops *ops,
797 snd_pcm_substream_t *substream,
798 int state)
799 {
800 int res;
801
802 down_read(&snd_pcm_link_rwsem);
803 if (snd_pcm_stream_linked(substream))
804 res = snd_pcm_action_group(ops, substream, state, 0);
805 else
806 res = snd_pcm_action_single(ops, substream, state);
807 up_read(&snd_pcm_link_rwsem);
808 return res;
809 }
810
811 /*
812 * start callbacks
813 */
814 static int snd_pcm_pre_start(snd_pcm_substream_t *substream, int state)
815 {
816 snd_pcm_runtime_t *runtime = substream->runtime;
817 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
818 return -EBADFD;
819 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
820 !snd_pcm_playback_data(substream))
821 return -EPIPE;
822 runtime->trigger_master = substream;
823 return 0;
824 }
825
826 static int snd_pcm_do_start(snd_pcm_substream_t *substream, int state)
827 {
828 if (substream->runtime->trigger_master != substream)
829 return 0;
830 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
831 }
832
833 static void snd_pcm_undo_start(snd_pcm_substream_t *substream, int state)
834 {
835 if (substream->runtime->trigger_master == substream)
836 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
837 }
838
839 static void snd_pcm_post_start(snd_pcm_substream_t *substream, int state)
840 {
841 snd_pcm_runtime_t *runtime = substream->runtime;
842 snd_pcm_trigger_tstamp(substream);
843 runtime->status->state = state;
844 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
845 runtime->silence_size > 0)
846 snd_pcm_playback_silence(substream, ULONG_MAX);
847 if (runtime->sleep_min)
848 snd_pcm_tick_prepare(substream);
849 if (substream->timer)
850 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART, &runtime->trigger_tstamp);
851 }
852
853 static struct action_ops snd_pcm_action_start = {
854 .pre_action = snd_pcm_pre_start,
855 .do_action = snd_pcm_do_start,
856 .undo_action = snd_pcm_undo_start,
857 .post_action = snd_pcm_post_start
858 };
859
860 /**
861 * snd_pcm_start
862 * @substream: the PCM substream instance
863 *
864 * Start all linked streams.
865 */
866 int snd_pcm_start(snd_pcm_substream_t *substream)
867 {
868 return snd_pcm_action(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
869 }
870
871 /*
872 * stop callbacks
873 */
874 static int snd_pcm_pre_stop(snd_pcm_substream_t *substream, int state)
875 {
876 snd_pcm_runtime_t *runtime = substream->runtime;
877 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
878 return -EBADFD;
879 runtime->trigger_master = substream;
880 return 0;
881 }
882
883 static int snd_pcm_do_stop(snd_pcm_substream_t *substream, int state)
884 {
885 if (substream->runtime->trigger_master == substream &&
886 snd_pcm_running(substream))
887 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
888 return 0; /* unconditonally stop all substreams */
889 }
890
891 static void snd_pcm_post_stop(snd_pcm_substream_t *substream, int state)
892 {
893 snd_pcm_runtime_t *runtime = substream->runtime;
894 if (runtime->status->state != state) {
895 snd_pcm_trigger_tstamp(substream);
896 if (substream->timer)
897 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP, &runtime->trigger_tstamp);
898 runtime->status->state = state;
899 snd_pcm_tick_set(substream, 0);
900 }
901 wake_up(&runtime->sleep);
902 }
903
904 static struct action_ops snd_pcm_action_stop = {
905 .pre_action = snd_pcm_pre_stop,
906 .do_action = snd_pcm_do_stop,
907 .post_action = snd_pcm_post_stop
908 };
909
910 /**
911 * snd_pcm_stop
912 * @substream: the PCM substream instance
913 * @state: PCM state after stopping the stream
914 *
915 * Try to stop all running streams in the substream group.
916 * The state of each stream is changed to the given value after that unconditionally.
917 */
918 int snd_pcm_stop(snd_pcm_substream_t *substream, int state)
919 {
920 return snd_pcm_action(&snd_pcm_action_stop, substream, state);
921 }
922
923 /**
924 * snd_pcm_drain_done
925 * @substream: the PCM substream
926 *
927 * Stop the DMA only when the given stream is playback.
928 * The state is changed to SETUP.
929 * Unlike snd_pcm_stop(), this affects only the given stream.
930 */
931 int snd_pcm_drain_done(snd_pcm_substream_t *substream)
932 {
933 return snd_pcm_action_single(&snd_pcm_action_stop, substream, SNDRV_PCM_STATE_SETUP);
934 }
935
936 /*
937 * pause callbacks
938 */
939 static int snd_pcm_pre_pause(snd_pcm_substream_t *substream, int push)
940 {
941 snd_pcm_runtime_t *runtime = substream->runtime;
942 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
943 return -ENOSYS;
944 if (push) {
945 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
946 return -EBADFD;
947 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
948 return -EBADFD;
949 runtime->trigger_master = substream;
950 return 0;
951 }
952
953 static int snd_pcm_do_pause(snd_pcm_substream_t *substream, int push)
954 {
955 if (substream->runtime->trigger_master != substream)
956 return 0;
957 return substream->ops->trigger(substream,
958 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
959 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
960 }
961
962 static void snd_pcm_undo_pause(snd_pcm_substream_t *substream, int push)
963 {
964 if (substream->runtime->trigger_master == substream)
965 substream->ops->trigger(substream,
966 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
967 SNDRV_PCM_TRIGGER_PAUSE_PUSH);
968 }
969
970 static void snd_pcm_post_pause(snd_pcm_substream_t *substream, int push)
971 {
972 snd_pcm_runtime_t *runtime = substream->runtime;
973 snd_pcm_trigger_tstamp(substream);
974 if (push) {
975 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
976 if (substream->timer)
977 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MPAUSE, &runtime->trigger_tstamp);
978 snd_pcm_tick_set(substream, 0);
979 wake_up(&runtime->sleep);
980 } else {
981 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
982 if (runtime->sleep_min)
983 snd_pcm_tick_prepare(substream);
984 if (substream->timer)
985 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MCONTINUE, &runtime->trigger_tstamp);
986 }
987 }
988
989 static struct action_ops snd_pcm_action_pause = {
990 .pre_action = snd_pcm_pre_pause,
991 .do_action = snd_pcm_do_pause,
992 .undo_action = snd_pcm_undo_pause,
993 .post_action = snd_pcm_post_pause
994 };
995
996 /*
997 * Push/release the pause for all linked streams.
998 */
999 static int snd_pcm_pause(snd_pcm_substream_t *substream, int push)
1000 {
1001 return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1002 }
1003
1004 #ifdef CONFIG_PM
1005 /* suspend */
1006
1007 static int snd_pcm_pre_suspend(snd_pcm_substream_t *substream, int state)
1008 {
1009 snd_pcm_runtime_t *runtime = substream->runtime;
1010 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1011 return -EBUSY;
1012 runtime->trigger_master = substream;
1013 return 0;
1014 }
1015
1016 static int snd_pcm_do_suspend(snd_pcm_substream_t *substream, int state)
1017 {
1018 snd_pcm_runtime_t *runtime = substream->runtime;
1019 if (runtime->trigger_master != substream)
1020 return 0;
1021 if (! snd_pcm_running(substream))
1022 return 0;
1023 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1024 return 0; /* suspend unconditionally */
1025 }
1026
1027 static void snd_pcm_post_suspend(snd_pcm_substream_t *substream, int state)
1028 {
1029 snd_pcm_runtime_t *runtime = substream->runtime;
1030 snd_pcm_trigger_tstamp(substream);
1031 if (substream->timer)
1032 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND, &runtime->trigger_tstamp);
1033 runtime->status->suspended_state = runtime->status->state;
1034 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1035 snd_pcm_tick_set(substream, 0);
1036 wake_up(&runtime->sleep);
1037 }
1038
1039 static struct action_ops snd_pcm_action_suspend = {
1040 .pre_action = snd_pcm_pre_suspend,
1041 .do_action = snd_pcm_do_suspend,
1042 .post_action = snd_pcm_post_suspend
1043 };
1044
1045 /**
1046 * snd_pcm_suspend
1047 * @substream: the PCM substream
1048 *
1049 * Trigger SUSPEND to all linked streams.
1050 * After this call, all streams are changed to SUSPENDED state.
1051 */
1052 int snd_pcm_suspend(snd_pcm_substream_t *substream)
1053 {
1054 int err;
1055 unsigned long flags;
1056
1057 snd_pcm_stream_lock_irqsave(substream, flags);
1058 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1059 snd_pcm_stream_unlock_irqrestore(substream, flags);
1060 return err;
1061 }
1062
1063 /**
1064 * snd_pcm_suspend_all
1065 * @pcm: the PCM instance
1066 *
1067 * Trigger SUSPEND to all substreams in the given pcm.
1068 * After this call, all streams are changed to SUSPENDED state.
1069 */
1070 int snd_pcm_suspend_all(snd_pcm_t *pcm)
1071 {
1072 snd_pcm_substream_t *substream;
1073 int stream, err = 0;
1074
1075 for (stream = 0; stream < 2; stream++) {
1076 for (substream = pcm->streams[stream].substream; substream; substream = substream->next) {
1077 /* FIXME: the open/close code should lock this as well */
1078 if (substream->runtime == NULL)
1079 continue;
1080 err = snd_pcm_suspend(substream);
1081 if (err < 0 && err != -EBUSY)
1082 return err;
1083 }
1084 }
1085 return 0;
1086 }
1087
1088 /* resume */
1089
1090 static int snd_pcm_pre_resume(snd_pcm_substream_t *substream, int state)
1091 {
1092 snd_pcm_runtime_t *runtime = substream->runtime;
1093 if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1094 return -ENOSYS;
1095 runtime->trigger_master = substream;
1096 return 0;
1097 }
1098
1099 static int snd_pcm_do_resume(snd_pcm_substream_t *substream, int state)
1100 {
1101 snd_pcm_runtime_t *runtime = substream->runtime;
1102 if (runtime->trigger_master != substream)
1103 return 0;
1104 /* DMA not running previously? */
1105 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1106 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1107 substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1108 return 0;
1109 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1110 }
1111
1112 static void snd_pcm_undo_resume(snd_pcm_substream_t *substream, int state)
1113 {
1114 if (substream->runtime->trigger_master == substream &&
1115 snd_pcm_running(substream))
1116 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1117 }
1118
1119 static void snd_pcm_post_resume(snd_pcm_substream_t *substream, int state)
1120 {
1121 snd_pcm_runtime_t *runtime = substream->runtime;
1122 snd_pcm_trigger_tstamp(substream);
1123 if (substream->timer)
1124 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME, &runtime->trigger_tstamp);
1125 runtime->status->state = runtime->status->suspended_state;
1126 if (runtime->sleep_min)
1127 snd_pcm_tick_prepare(substream);
1128 }
1129
1130 static struct action_ops snd_pcm_action_resume = {
1131 .pre_action = snd_pcm_pre_resume,
1132 .do_action = snd_pcm_do_resume,
1133 .undo_action = snd_pcm_undo_resume,
1134 .post_action = snd_pcm_post_resume
1135 };
1136
1137 static int snd_pcm_resume(snd_pcm_substream_t *substream)
1138 {
1139 snd_card_t *card = substream->pcm->card;
1140 int res;
1141
1142 snd_power_lock(card);
1143 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0, substream->ffile)) >= 0)
1144 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1145 snd_power_unlock(card);
1146 return res;
1147 }
1148
1149 #else
1150
1151 static int snd_pcm_resume(snd_pcm_substream_t *substream)
1152 {
1153 return -ENOSYS;
1154 }
1155
1156 #endif /* CONFIG_PM */
1157
1158 /*
1159 * xrun ioctl
1160 *
1161 * Change the RUNNING stream(s) to XRUN state.
1162 */
1163 static int snd_pcm_xrun(snd_pcm_substream_t *substream)
1164 {
1165 snd_card_t *card = substream->pcm->card;
1166 snd_pcm_runtime_t *runtime = substream->runtime;
1167 int result;
1168
1169 snd_power_lock(card);
1170 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1171 result = snd_power_wait(card, SNDRV_CTL_POWER_D0, substream->ffile);
1172 if (result < 0)
1173 goto _unlock;
1174 }
1175
1176 snd_pcm_stream_lock_irq(substream);
1177 switch (runtime->status->state) {
1178 case SNDRV_PCM_STATE_XRUN:
1179 result = 0; /* already there */
1180 break;
1181 case SNDRV_PCM_STATE_RUNNING:
1182 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1183 break;
1184 default:
1185 result = -EBADFD;
1186 }
1187 snd_pcm_stream_unlock_irq(substream);
1188 _unlock:
1189 snd_power_unlock(card);
1190 return result;
1191 }
1192
1193 /*
1194 * reset ioctl
1195 */
1196 static int snd_pcm_pre_reset(snd_pcm_substream_t * substream, int state)
1197 {
1198 snd_pcm_runtime_t *runtime = substream->runtime;
1199 switch (runtime->status->state) {
1200 case SNDRV_PCM_STATE_RUNNING:
1201 case SNDRV_PCM_STATE_PREPARED:
1202 case SNDRV_PCM_STATE_PAUSED:
1203 case SNDRV_PCM_STATE_SUSPENDED:
1204 return 0;
1205 default:
1206 return -EBADFD;
1207 }
1208 }
1209
1210 static int snd_pcm_do_reset(snd_pcm_substream_t * substream, int state)
1211 {
1212 snd_pcm_runtime_t *runtime = substream->runtime;
1213 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1214 if (err < 0)
1215 return err;
1216 // snd_assert(runtime->status->hw_ptr < runtime->buffer_size, );
1217 runtime->hw_ptr_base = 0;
1218 runtime->hw_ptr_interrupt = runtime->status->hw_ptr - runtime->status->hw_ptr % runtime->period_size;
1219 runtime->silence_start = runtime->status->hw_ptr;
1220 runtime->silence_filled = 0;
1221 return 0;
1222 }
1223
1224 static void snd_pcm_post_reset(snd_pcm_substream_t * substream, int state)
1225 {
1226 snd_pcm_runtime_t *runtime = substream->runtime;
1227 runtime->control->appl_ptr = runtime->status->hw_ptr;
1228 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1229 runtime->silence_size > 0)
1230 snd_pcm_playback_silence(substream, ULONG_MAX);
1231 }
1232
1233 static struct action_ops snd_pcm_action_reset = {
1234 .pre_action = snd_pcm_pre_reset,
1235 .do_action = snd_pcm_do_reset,
1236 .post_action = snd_pcm_post_reset
1237 };
1238
1239 static int snd_pcm_reset(snd_pcm_substream_t *substream)
1240 {
1241 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1242 }
1243
1244 /*
1245 * prepare ioctl
1246 */
1247 static int snd_pcm_pre_prepare(snd_pcm_substream_t * substream, int state)
1248 {
1249 snd_pcm_runtime_t *runtime = substream->runtime;
1250 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1251 return -EBADFD;
1252 if (snd_pcm_running(substream))
1253 return -EBUSY;
1254 return 0;
1255 }
1256
1257 static int snd_pcm_do_prepare(snd_pcm_substream_t * substream, int state)
1258 {
1259 int err;
1260 err = substream->ops->prepare(substream);
1261 if (err < 0)
1262 return err;
1263 return snd_pcm_do_reset(substream, 0);
1264 }
1265
1266 static void snd_pcm_post_prepare(snd_pcm_substream_t * substream, int state)
1267 {
1268 snd_pcm_runtime_t *runtime = substream->runtime;
1269 runtime->control->appl_ptr = runtime->status->hw_ptr;
1270 runtime->status->state = SNDRV_PCM_STATE_PREPARED;
1271 }
1272
1273 static struct action_ops snd_pcm_action_prepare = {
1274 .pre_action = snd_pcm_pre_prepare,
1275 .do_action = snd_pcm_do_prepare,
1276 .post_action = snd_pcm_post_prepare
1277 };
1278
1279 /**
1280 * snd_pcm_prepare
1281 * @substream: the PCM substream instance
1282 *
1283 * Prepare the PCM substream to be triggerable.
1284 */
1285 int snd_pcm_prepare(snd_pcm_substream_t *substream)
1286 {
1287 int res;
1288 snd_card_t *card = substream->pcm->card;
1289
1290 snd_power_lock(card);
1291 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0, substream->ffile)) >= 0)
1292 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare, substream, 0);
1293 snd_power_unlock(card);
1294 return res;
1295 }
1296
1297 /*
1298 * drain ioctl
1299 */
1300
1301 static int snd_pcm_pre_drain_init(snd_pcm_substream_t * substream, int state)
1302 {
1303 if (substream->ffile->f_flags & O_NONBLOCK)
1304 return -EAGAIN;
1305 substream->runtime->trigger_master = substream;
1306 return 0;
1307 }
1308
1309 static int snd_pcm_do_drain_init(snd_pcm_substream_t * substream, int state)
1310 {
1311 snd_pcm_runtime_t *runtime = substream->runtime;
1312 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1313 switch (runtime->status->state) {
1314 case SNDRV_PCM_STATE_PREPARED:
1315 /* start playback stream if possible */
1316 if (! snd_pcm_playback_empty(substream)) {
1317 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1318 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1319 }
1320 break;
1321 case SNDRV_PCM_STATE_RUNNING:
1322 runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1323 break;
1324 default:
1325 break;
1326 }
1327 } else {
1328 /* stop running stream */
1329 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1330 int state = snd_pcm_capture_avail(runtime) > 0 ?
1331 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1332 snd_pcm_do_stop(substream, state);
1333 snd_pcm_post_stop(substream, state);
1334 }
1335 }
1336 return 0;
1337 }
1338
1339 static void snd_pcm_post_drain_init(snd_pcm_substream_t * substream, int state)
1340 {
1341 }
1342
1343 static struct action_ops snd_pcm_action_drain_init = {
1344 .pre_action = snd_pcm_pre_drain_init,
1345 .do_action = snd_pcm_do_drain_init,
1346 .post_action = snd_pcm_post_drain_init
1347 };
1348
1349 struct drain_rec {
1350 snd_pcm_substream_t *substream;
1351 wait_queue_t wait;
1352 snd_pcm_uframes_t stop_threshold;
1353 };
1354
1355 static int snd_pcm_drop(snd_pcm_substream_t *substream);
1356
1357 /*
1358 * Drain the stream(s).
1359 * When the substream is linked, sync until the draining of all playback streams
1360 * is finished.
1361 * After this call, all streams are supposed to be either SETUP or DRAINING
1362 * (capture only) state.
1363 */
1364 static int snd_pcm_drain(snd_pcm_substream_t *substream)
1365 {
1366 snd_card_t *card;
1367 snd_pcm_runtime_t *runtime;
1368 struct list_head *pos;
1369 int result = 0;
1370 int i, num_drecs;
1371 struct drain_rec *drec, drec_tmp, *d;
1372
1373 snd_assert(substream != NULL, return -ENXIO);
1374 card = substream->pcm->card;
1375 runtime = substream->runtime;
1376
1377 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1378 return -EBADFD;
1379
1380 snd_power_lock(card);
1381 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1382 result = snd_power_wait(card, SNDRV_CTL_POWER_D0, substream->ffile);
1383 if (result < 0) {
1384 snd_power_unlock(card);
1385 return result;
1386 }
1387 }
1388
1389 /* allocate temporary record for drain sync */
1390 down_read(&snd_pcm_link_rwsem);
1391 if (snd_pcm_stream_linked(substream)) {
1392 drec = kmalloc(substream->group->count * sizeof(*drec), GFP_KERNEL);
1393 if (! drec) {
1394 up_read(&snd_pcm_link_rwsem);
1395 snd_power_unlock(card);
1396 return -ENOMEM;
1397 }
1398 } else
1399 drec = &drec_tmp;
1400
1401 /* count only playback streams */
1402 num_drecs = 0;
1403 snd_pcm_group_for_each(pos, substream) {
1404 snd_pcm_substream_t *s = snd_pcm_group_substream_entry(pos);
1405 runtime = s->runtime;
1406 if (s->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1407 d = &drec[num_drecs++];
1408 d->substream = s;
1409 init_waitqueue_entry(&d->wait, current);
1410 add_wait_queue(&runtime->sleep, &d->wait);
1411 /* stop_threshold fixup to avoid endless loop when
1412 * stop_threshold > buffer_size
1413 */
1414 d->stop_threshold = runtime->stop_threshold;
1415 if (runtime->stop_threshold > runtime->buffer_size)
1416 runtime->stop_threshold = runtime->buffer_size;
1417 }
1418 }
1419 up_read(&snd_pcm_link_rwsem);
1420 if (! num_drecs)
1421 goto _error;
1422
1423 snd_pcm_stream_lock_irq(substream);
1424 /* resume pause */
1425 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1426 snd_pcm_pause(substream, 0);
1427
1428 /* pre-start/stop - all running streams are changed to DRAINING state */
1429 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1430 if (result < 0) {
1431 snd_pcm_stream_unlock_irq(substream);
1432 goto _error;
1433 }
1434
1435 for (;;) {
1436 long tout;
1437 if (signal_pending(current)) {
1438 result = -ERESTARTSYS;
1439 break;
1440 }
1441 /* all finished? */
1442 for (i = 0; i < num_drecs; i++) {
1443 runtime = drec[i].substream->runtime;
1444 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING)
1445 break;
1446 }
1447 if (i == num_drecs)
1448 break; /* yes, all drained */
1449
1450 set_current_state(TASK_INTERRUPTIBLE);
1451 snd_pcm_stream_unlock_irq(substream);
1452 snd_power_unlock(card);
1453 tout = schedule_timeout(10 * HZ);
1454 snd_power_lock(card);
1455 snd_pcm_stream_lock_irq(substream);
1456 if (tout == 0) {
1457 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1458 result = -ESTRPIPE;
1459 else {
1460 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1461 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1462 result = -EIO;
1463 }
1464 break;
1465 }
1466 }
1467
1468 snd_pcm_stream_unlock_irq(substream);
1469
1470 _error:
1471 for (i = 0; i < num_drecs; i++) {
1472 d = &drec[i];
1473 runtime = d->substream->runtime;
1474 remove_wait_queue(&runtime->sleep, &d->wait);
1475 runtime->stop_threshold = d->stop_threshold;
1476 }
1477
1478 if (drec != &drec_tmp)
1479 kfree(drec);
1480 snd_power_unlock(card);
1481
1482 return result;
1483 }
1484
1485 /*
1486 * drop ioctl
1487 *
1488 * Immediately put all linked substreams into SETUP state.
1489 */
1490 static int snd_pcm_drop(snd_pcm_substream_t *substream)
1491 {
1492 snd_pcm_runtime_t *runtime;
1493 snd_card_t *card;
1494 int result = 0;
1495
1496 snd_assert(substream != NULL, return -ENXIO);
1497 runtime = substream->runtime;
1498 card = substream->pcm->card;
1499
1500 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1501 return -EBADFD;
1502
1503 snd_power_lock(card);
1504 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1505 result = snd_power_wait(card, SNDRV_CTL_POWER_D0, substream->ffile);
1506 if (result < 0)
1507 goto _unlock;
1508 }
1509
1510 snd_pcm_stream_lock_irq(substream);
1511 /* resume pause */
1512 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1513 snd_pcm_pause(substream, 0);
1514
1515 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1516 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1517 snd_pcm_stream_unlock_irq(substream);
1518 _unlock:
1519 snd_power_unlock(card);
1520 return result;
1521 }
1522
1523
1524 /* WARNING: Don't forget to fput back the file */
1525 extern int snd_major;
1526 static struct file *snd_pcm_file_fd(int fd)
1527 {
1528 struct file *file;
1529 struct inode *inode;
1530 unsigned short minor;
1531 file = fget(fd);
1532 if (!file)
1533 return NULL;
1534 inode = file->f_dentry->d_inode;
1535 if (!S_ISCHR(inode->i_mode) ||
1536 imajor(inode) != snd_major) {
1537 fput(file);
1538 return NULL;
1539 }
1540 minor = iminor(inode);
1541 if (minor >= 256 ||
1542 minor % SNDRV_MINOR_DEVICES < SNDRV_MINOR_PCM_PLAYBACK) {
1543 fput(file);
1544 return NULL;
1545 }
1546 return file;
1547 }
1548
1549 /*
1550 * PCM link handling
1551 */
1552 static int snd_pcm_link(snd_pcm_substream_t *substream, int fd)
1553 {
1554 int res = 0;
1555 struct file *file;
1556 snd_pcm_file_t *pcm_file;
1557 snd_pcm_substream_t *substream1;
1558
1559 file = snd_pcm_file_fd(fd);
1560 if (!file)
1561 return -EBADFD;
1562 pcm_file = file->private_data;
1563 substream1 = pcm_file->substream;
1564 down_write(&snd_pcm_link_rwsem);
1565 write_lock_irq(&snd_pcm_link_rwlock);
1566 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1567 substream->runtime->status->state != substream1->runtime->status->state) {
1568 res = -EBADFD;
1569 goto _end;
1570 }
1571 if (snd_pcm_stream_linked(substream1)) {
1572 res = -EALREADY;
1573 goto _end;
1574 }
1575 if (!snd_pcm_stream_linked(substream)) {
1576 substream->group = kmalloc(sizeof(snd_pcm_group_t), GFP_ATOMIC);
1577 if (substream->group == NULL) {
1578 res = -ENOMEM;
1579 goto _end;
1580 }
1581 spin_lock_init(&substream->group->lock);
1582 INIT_LIST_HEAD(&substream->group->substreams);
1583 list_add_tail(&substream->link_list, &substream->group->substreams);
1584 substream->group->count = 1;
1585 }
1586 list_add_tail(&substream1->link_list, &substream->group->substreams);
1587 substream->group->count++;
1588 substream1->group = substream->group;
1589 _end:
1590 write_unlock_irq(&snd_pcm_link_rwlock);
1591 up_write(&snd_pcm_link_rwsem);
1592 fput(file);
1593 return res;
1594 }
1595
1596 static void relink_to_local(snd_pcm_substream_t *substream)
1597 {
1598 substream->group = &substream->self_group;
1599 INIT_LIST_HEAD(&substream->self_group.substreams);
1600 list_add_tail(&substream->link_list, &substream->self_group.substreams);
1601 }
1602
1603 static int snd_pcm_unlink(snd_pcm_substream_t *substream)
1604 {
1605 struct list_head *pos;
1606 int res = 0;
1607
1608 down_write(&snd_pcm_link_rwsem);
1609 write_lock_irq(&snd_pcm_link_rwlock);
1610 if (!snd_pcm_stream_linked(substream)) {
1611 res = -EALREADY;
1612 goto _end;
1613 }
1614 list_del(&substream->link_list);
1615 substream->group->count--;
1616 if (substream->group->count == 1) { /* detach the last stream, too */
1617 snd_pcm_group_for_each(pos, substream) {
1618 relink_to_local(snd_pcm_group_substream_entry(pos));
1619 break;
1620 }
1621 kfree(substream->group);
1622 }
1623 relink_to_local(substream);
1624 _end:
1625 write_unlock_irq(&snd_pcm_link_rwlock);
1626 up_write(&snd_pcm_link_rwsem);
1627 return res;
1628 }
1629
1630 /*
1631 * hw configurator
1632 */
1633 static int snd_pcm_hw_rule_mul(snd_pcm_hw_params_t *params,
1634 snd_pcm_hw_rule_t *rule)
1635 {
1636 snd_interval_t t;
1637 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1638 hw_param_interval_c(params, rule->deps[1]), &t);
1639 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1640 }
1641
1642 static int snd_pcm_hw_rule_div(snd_pcm_hw_params_t *params,
1643 snd_pcm_hw_rule_t *rule)
1644 {
1645 snd_interval_t t;
1646 snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1647 hw_param_interval_c(params, rule->deps[1]), &t);
1648 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1649 }
1650
1651 static int snd_pcm_hw_rule_muldivk(snd_pcm_hw_params_t *params,
1652 snd_pcm_hw_rule_t *rule)
1653 {
1654 snd_interval_t t;
1655 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1656 hw_param_interval_c(params, rule->deps[1]),
1657 (unsigned long) rule->private, &t);
1658 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1659 }
1660
1661 static int snd_pcm_hw_rule_mulkdiv(snd_pcm_hw_params_t *params,
1662 snd_pcm_hw_rule_t *rule)
1663 {
1664 snd_interval_t t;
1665 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1666 (unsigned long) rule->private,
1667 hw_param_interval_c(params, rule->deps[1]), &t);
1668 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1669 }
1670
1671 static int snd_pcm_hw_rule_format(snd_pcm_hw_params_t *params,
1672 snd_pcm_hw_rule_t *rule)
1673 {
1674 unsigned int k;
1675 snd_interval_t *i = hw_param_interval(params, rule->deps[0]);
1676 snd_mask_t m;
1677 snd_mask_t *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1678 snd_mask_any(&m);
1679 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1680 int bits;
1681 if (! snd_mask_test(mask, k))
1682 continue;
1683 bits = snd_pcm_format_physical_width(k);
1684 if (bits <= 0)
1685 continue; /* ignore invalid formats */
1686 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1687 snd_mask_reset(&m, k);
1688 }
1689 return snd_mask_refine(mask, &m);
1690 }
1691
1692 static int snd_pcm_hw_rule_sample_bits(snd_pcm_hw_params_t *params,
1693 snd_pcm_hw_rule_t *rule)
1694 {
1695 snd_interval_t t;
1696 unsigned int k;
1697 t.min = UINT_MAX;
1698 t.max = 0;
1699 t.openmin = 0;
1700 t.openmax = 0;
1701 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1702 int bits;
1703 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1704 continue;
1705 bits = snd_pcm_format_physical_width(k);
1706 if (bits <= 0)
1707 continue; /* ignore invalid formats */
1708 if (t.min > (unsigned)bits)
1709 t.min = bits;
1710 if (t.max < (unsigned)bits)
1711 t.max = bits;
1712 }
1713 t.integer = 1;
1714 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1715 }
1716
1717 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1718 #error "Change this table"
1719 #endif
1720
1721 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1722 48000, 64000, 88200, 96000, 176400, 192000 };
1723
1724 static int snd_pcm_hw_rule_rate(snd_pcm_hw_params_t *params,
1725 snd_pcm_hw_rule_t *rule)
1726 {
1727 snd_pcm_hardware_t *hw = rule->private;
1728 return snd_interval_list(hw_param_interval(params, rule->var),
1729 ARRAY_SIZE(rates), rates, hw->rates);
1730 }
1731
1732 static int snd_pcm_hw_rule_buffer_bytes_max(snd_pcm_hw_params_t *params,
1733 snd_pcm_hw_rule_t *rule)
1734 {
1735 snd_interval_t t;
1736 snd_pcm_substream_t *substream = rule->private;
1737 t.min = 0;
1738 t.max = substream->buffer_bytes_max;
1739 t.openmin = 0;
1740 t.openmax = 0;
1741 t.integer = 1;
1742 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1743 }
1744
1745 int snd_pcm_hw_constraints_init(snd_pcm_substream_t *substream)
1746 {
1747 snd_pcm_runtime_t *runtime = substream->runtime;
1748 snd_pcm_hw_constraints_t *constrs = &runtime->hw_constraints;
1749 int k, err;
1750
1751 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1752 snd_mask_any(constrs_mask(constrs, k));
1753 }
1754
1755 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1756 snd_interval_any(constrs_interval(constrs, k));
1757 }
1758
1759 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1760 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1761 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1762 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1763 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1764
1765 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1766 snd_pcm_hw_rule_format, NULL,
1767 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1768 if (err < 0)
1769 return err;
1770 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1771 snd_pcm_hw_rule_sample_bits, NULL,
1772 SNDRV_PCM_HW_PARAM_FORMAT,
1773 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1774 if (err < 0)
1775 return err;
1776 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1777 snd_pcm_hw_rule_div, NULL,
1778 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1779 if (err < 0)
1780 return err;
1781 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1782 snd_pcm_hw_rule_mul, NULL,
1783 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1784 if (err < 0)
1785 return err;
1786 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1787 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1788 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1789 if (err < 0)
1790 return err;
1791 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1792 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1793 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1794 if (err < 0)
1795 return err;
1796 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1797 snd_pcm_hw_rule_div, NULL,
1798 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1799 if (err < 0)
1800 return err;
1801 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1802 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1803 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1804 if (err < 0)
1805 return err;
1806 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1807 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1808 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1809 if (err < 0)
1810 return err;
1811 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
1812 snd_pcm_hw_rule_div, NULL,
1813 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1814 if (err < 0)
1815 return err;
1816 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1817 snd_pcm_hw_rule_div, NULL,
1818 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1819 if (err < 0)
1820 return err;
1821 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1822 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1823 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1824 if (err < 0)
1825 return err;
1826 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1827 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1828 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1829 if (err < 0)
1830 return err;
1831 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1832 snd_pcm_hw_rule_mul, NULL,
1833 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1834 if (err < 0)
1835 return err;
1836 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1837 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1838 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1839 if (err < 0)
1840 return err;
1841 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1842 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1843 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1844 if (err < 0)
1845 return err;
1846 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1847 snd_pcm_hw_rule_muldivk, (void*) 8,
1848 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1849 if (err < 0)
1850 return err;
1851 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1852 snd_pcm_hw_rule_muldivk, (void*) 8,
1853 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1854 if (err < 0)
1855 return err;
1856 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1857 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1858 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1859 if (err < 0)
1860 return err;
1861 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
1862 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1863 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1864 if (err < 0)
1865 return err;
1866 return 0;
1867 }
1868
1869 int snd_pcm_hw_constraints_complete(snd_pcm_substream_t *substream)
1870 {
1871 snd_pcm_runtime_t *runtime = substream->runtime;
1872 snd_pcm_hardware_t *hw = &runtime->hw;
1873 int err;
1874 unsigned int mask = 0;
1875
1876 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1877 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1878 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1879 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1880 if (hw->info & SNDRV_PCM_INFO_MMAP) {
1881 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1882 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1883 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1884 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1885 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1886 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1887 }
1888 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
1889 snd_assert(err >= 0, return -EINVAL);
1890
1891 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
1892 snd_assert(err >= 0, return -EINVAL);
1893
1894 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
1895 snd_assert(err >= 0, return -EINVAL);
1896
1897 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1898 hw->channels_min, hw->channels_max);
1899 snd_assert(err >= 0, return -EINVAL);
1900
1901 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1902 hw->rate_min, hw->rate_max);
1903 snd_assert(err >= 0, return -EINVAL);
1904
1905 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1906 hw->period_bytes_min, hw->period_bytes_max);
1907 snd_assert(err >= 0, return -EINVAL);
1908
1909 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1910 hw->periods_min, hw->periods_max);
1911 snd_assert(err >= 0, return -EINVAL);
1912
1913 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1914 hw->period_bytes_min, hw->buffer_bytes_max);
1915 snd_assert(err >= 0, return -EINVAL);
1916
1917 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1918 snd_pcm_hw_rule_buffer_bytes_max, substream,
1919 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1920 if (err < 0)
1921 return err;
1922
1923 /* FIXME: remove */
1924 if (runtime->dma_bytes) {
1925 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
1926 snd_assert(err >= 0, return -EINVAL);
1927 }
1928
1929 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
1930 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1931 snd_pcm_hw_rule_rate, hw,
1932 SNDRV_PCM_HW_PARAM_RATE, -1);
1933 if (err < 0)
1934 return err;
1935 }
1936
1937 /* FIXME: this belong to lowlevel */
1938 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_TICK_TIME,
1939 1000000 / HZ, 1000000 / HZ);
1940 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
1941
1942 return 0;
1943 }
1944
1945 static void snd_pcm_add_file(snd_pcm_str_t *str,
1946 snd_pcm_file_t *pcm_file)
1947 {
1948 pcm_file->next = str->files;
1949 str->files = pcm_file;
1950 }
1951
1952 static void snd_pcm_remove_file(snd_pcm_str_t *str,
1953 snd_pcm_file_t *pcm_file)
1954 {
1955 snd_pcm_file_t * pcm_file1;
1956 if (str->files == pcm_file) {
1957 str->files = pcm_file->next;
1958 } else {
1959 pcm_file1 = str->files;
1960 while (pcm_file1 && pcm_file1->next != pcm_file)
1961 pcm_file1 = pcm_file1->next;
1962 if (pcm_file1 != NULL)
1963 pcm_file1->next = pcm_file->next;
1964 }
1965 }
1966
1967 static int snd_pcm_release_file(snd_pcm_file_t * pcm_file)
1968 {
1969 snd_pcm_substream_t *substream;
1970 snd_pcm_runtime_t *runtime;
1971 snd_pcm_str_t * str;
1972
1973 snd_assert(pcm_file != NULL, return -ENXIO);
1974 substream = pcm_file->substream;
1975 snd_assert(substream != NULL, return -ENXIO);
1976 runtime = substream->runtime;
1977 str = substream->pstr;
1978 snd_pcm_unlink(substream);
1979 if (substream->ffile != NULL) {
1980 if (substream->ops->hw_free != NULL)
1981 substream->ops->hw_free(substream);
1982 substream->ops->close(substream);
1983 substream->ffile = NULL;
1984 }
1985 snd_pcm_remove_file(str, pcm_file);
1986 snd_pcm_release_substream(substream);
1987 kfree(pcm_file);
1988 return 0;
1989 }
1990
1991 static int snd_pcm_open_file(struct file *file,
1992 snd_pcm_t *pcm,
1993 int stream,
1994 snd_pcm_file_t **rpcm_file)
1995 {
1996 int err = 0;
1997 snd_pcm_file_t *pcm_file;
1998 snd_pcm_substream_t *substream;
1999 snd_pcm_str_t *str;
2000
2001 snd_assert(rpcm_file != NULL, return -EINVAL);
2002 *rpcm_file = NULL;
2003
2004 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2005 if (pcm_file == NULL) {
2006 return -ENOMEM;
2007 }
2008
2009 if ((err = snd_pcm_open_substream(pcm, stream, &substream)) < 0) {
2010 kfree(pcm_file);
2011 return err;
2012 }
2013
2014 str = substream->pstr;
2015 substream->file = pcm_file;
2016 substream->no_mmap_ctrl = 0;
2017
2018 pcm_file->substream = substream;
2019
2020 snd_pcm_add_file(str, pcm_file);
2021
2022 err = snd_pcm_hw_constraints_init(substream);
2023 if (err < 0) {
2024 snd_printd("snd_pcm_hw_constraints_init failed\n");
2025 snd_pcm_release_file(pcm_file);
2026 return err;
2027 }
2028
2029 if ((err = substream->ops->open(substream)) < 0) {
2030 snd_pcm_release_file(pcm_file);
2031 return err;
2032 }
2033 substream->ffile = file;
2034
2035 err = snd_pcm_hw_constraints_complete(substream);
2036 if (err < 0) {
2037 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2038 snd_pcm_release_file(pcm_file);
2039 return err;
2040 }
2041
2042 file->private_data = pcm_file;
2043 *rpcm_file = pcm_file;
2044 return 0;
2045 }
2046
2047 static int snd_pcm_open(struct inode *inode, struct file *file)
2048 {
2049 int cardnum = SNDRV_MINOR_CARD(iminor(inode));
2050 int device = SNDRV_MINOR_DEVICE(iminor(inode));
2051 int err;
2052 snd_pcm_t *pcm;
2053 snd_pcm_file_t *pcm_file;
2054 wait_queue_t wait;
2055
2056 snd_runtime_check(device >= SNDRV_MINOR_PCM_PLAYBACK && device < SNDRV_MINOR_DEVICES, return -ENXIO);
2057 pcm = snd_pcm_devices[(cardnum * SNDRV_PCM_DEVICES) + (device % SNDRV_MINOR_PCMS)];
2058 if (pcm == NULL) {
2059 err = -ENODEV;
2060 goto __error1;
2061 }
2062 err = snd_card_file_add(pcm->card, file);
2063 if (err < 0)
2064 goto __error1;
2065 if (!try_module_get(pcm->card->module)) {
2066 err = -EFAULT;
2067 goto __error2;
2068 }
2069 init_waitqueue_entry(&wait, current);
2070 add_wait_queue(&pcm->open_wait, &wait);
2071 down(&pcm->open_mutex);
2072 while (1) {
2073 err = snd_pcm_open_file(file, pcm, device >= SNDRV_MINOR_PCM_CAPTURE ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, &pcm_file);
2074 if (err >= 0)
2075 break;
2076 if (err == -EAGAIN) {
2077 if (file->f_flags & O_NONBLOCK) {
2078 err = -EBUSY;
2079 break;
2080 }
2081 } else
2082 break;
2083 set_current_state(TASK_INTERRUPTIBLE);
2084 up(&pcm->open_mutex);
2085 schedule();
2086 down(&pcm->open_mutex);
2087 if (signal_pending(current)) {
2088 err = -ERESTARTSYS;
2089 break;
2090 }
2091 }
2092 remove_wait_queue(&pcm->open_wait, &wait);
2093 up(&pcm->open_mutex);
2094 if (err < 0)
2095 goto __error;
2096 return err;
2097
2098 __error:
2099 module_put(pcm->card->module);
2100 __error2:
2101 snd_card_file_remove(pcm->card, file);
2102 __error1:
2103 return err;
2104 }
2105
2106 static int snd_pcm_release(struct inode *inode, struct file *file)
2107 {
2108 snd_pcm_t *pcm;
2109 snd_pcm_substream_t *substream;
2110 snd_pcm_file_t *pcm_file;
2111
2112 pcm_file = file->private_data;
2113 substream = pcm_file->substream;
2114 snd_assert(substream != NULL, return -ENXIO);
2115 snd_assert(!atomic_read(&substream->runtime->mmap_count), );
2116 pcm = substream->pcm;
2117 snd_pcm_drop(substream);
2118 fasync_helper(-1, file, 0, &substream->runtime->fasync);
2119 down(&pcm->open_mutex);
2120 snd_pcm_release_file(pcm_file);
2121 up(&pcm->open_mutex);
2122 wake_up(&pcm->open_wait);
2123 module_put(pcm->card->module);
2124 snd_card_file_remove(pcm->card, file);
2125 return 0;
2126 }
2127
2128 static snd_pcm_sframes_t snd_pcm_playback_rewind(snd_pcm_substream_t *substream, snd_pcm_uframes_t frames)
2129 {
2130 snd_pcm_runtime_t *runtime = substream->runtime;
2131 snd_pcm_sframes_t appl_ptr;
2132 snd_pcm_sframes_t ret;
2133 snd_pcm_sframes_t hw_avail;
2134
2135 if (frames == 0)
2136 return 0;
2137
2138 snd_pcm_stream_lock_irq(substream);
2139 switch (runtime->status->state) {
2140 case SNDRV_PCM_STATE_PREPARED:
2141 break;
2142 case SNDRV_PCM_STATE_DRAINING:
2143 case SNDRV_PCM_STATE_RUNNING:
2144 if (snd_pcm_update_hw_ptr(substream) >= 0)
2145 break;
2146 /* Fall through */
2147 case SNDRV_PCM_STATE_XRUN:
2148 ret = -EPIPE;
2149 goto __end;
2150 default:
2151 ret = -EBADFD;
2152 goto __end;
2153 }
2154
2155 hw_avail = snd_pcm_playback_hw_avail(runtime);
2156 if (hw_avail <= 0) {
2157 ret = 0;
2158 goto __end;
2159 }
2160 if (frames > (snd_pcm_uframes_t)hw_avail)
2161 frames = hw_avail;
2162 else
2163 frames -= frames % runtime->xfer_align;
2164 appl_ptr = runtime->control->appl_ptr - frames;
2165 if (appl_ptr < 0)
2166 appl_ptr += runtime->boundary;
2167 runtime->control->appl_ptr = appl_ptr;
2168 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2169 runtime->sleep_min)
2170 snd_pcm_tick_prepare(substream);
2171 ret = frames;
2172 __end:
2173 snd_pcm_stream_unlock_irq(substream);
2174 return ret;
2175 }
2176
2177 static snd_pcm_sframes_t snd_pcm_capture_rewind(snd_pcm_substream_t *substream, snd_pcm_uframes_t frames)
2178 {
2179 snd_pcm_runtime_t *runtime = substream->runtime;
2180 snd_pcm_sframes_t appl_ptr;
2181 snd_pcm_sframes_t ret;
2182 snd_pcm_sframes_t hw_avail;
2183
2184 if (frames == 0)
2185 return 0;
2186
2187 snd_pcm_stream_lock_irq(substream);
2188 switch (runtime->status->state) {
2189 case SNDRV_PCM_STATE_PREPARED:
2190 case SNDRV_PCM_STATE_DRAINING:
2191 break;
2192 case SNDRV_PCM_STATE_RUNNING:
2193 if (snd_pcm_update_hw_ptr(substream) >= 0)
2194 break;
2195 /* Fall through */
2196 case SNDRV_PCM_STATE_XRUN:
2197 ret = -EPIPE;
2198 goto __end;
2199 default:
2200 ret = -EBADFD;
2201 goto __end;
2202 }
2203
2204 hw_avail = snd_pcm_capture_hw_avail(runtime);
2205 if (hw_avail <= 0) {
2206 ret = 0;
2207 goto __end;
2208 }
2209 if (frames > (snd_pcm_uframes_t)hw_avail)
2210 frames = hw_avail;
2211 else
2212 frames -= frames % runtime->xfer_align;
2213 appl_ptr = runtime->control->appl_ptr - frames;
2214 if (appl_ptr < 0)
2215 appl_ptr += runtime->boundary;
2216 runtime->control->appl_ptr = appl_ptr;
2217 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2218 runtime->sleep_min)
2219 snd_pcm_tick_prepare(substream);
2220 ret = frames;
2221 __end:
2222 snd_pcm_stream_unlock_irq(substream);
2223 return ret;
2224 }
2225
2226 static snd_pcm_sframes_t snd_pcm_playback_forward(snd_pcm_substream_t *substream, snd_pcm_uframes_t frames)
2227 {
2228 snd_pcm_runtime_t *runtime = substream->runtime;
2229 snd_pcm_sframes_t appl_ptr;
2230 snd_pcm_sframes_t ret;
2231 snd_pcm_sframes_t avail;
2232
2233 if (frames == 0)
2234 return 0;
2235
2236 snd_pcm_stream_lock_irq(substream);
2237 switch (runtime->status->state) {
2238 case SNDRV_PCM_STATE_PREPARED:
2239 case SNDRV_PCM_STATE_PAUSED:
2240 break;
2241 case SNDRV_PCM_STATE_DRAINING:
2242 case SNDRV_PCM_STATE_RUNNING:
2243 if (snd_pcm_update_hw_ptr(substream) >= 0)
2244 break;
2245 /* Fall through */
2246 case SNDRV_PCM_STATE_XRUN:
2247 ret = -EPIPE;
2248 goto __end;
2249 default:
2250 ret = -EBADFD;
2251 goto __end;
2252 }
2253
2254 avail = snd_pcm_playback_avail(runtime);
2255 if (avail <= 0) {
2256 ret = 0;
2257 goto __end;
2258 }
2259 if (frames > (snd_pcm_uframes_t)avail)
2260 frames = avail;
2261 else
2262 frames -= frames % runtime->xfer_align;
2263 appl_ptr = runtime->control->appl_ptr + frames;
2264 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2265 appl_ptr -= runtime->boundary;
2266 runtime->control->appl_ptr = appl_ptr;
2267 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2268 runtime->sleep_min)
2269 snd_pcm_tick_prepare(substream);
2270 ret = frames;
2271 __end:
2272 snd_pcm_stream_unlock_irq(substream);
2273 return ret;
2274 }
2275
2276 static snd_pcm_sframes_t snd_pcm_capture_forward(snd_pcm_substream_t *substream, snd_pcm_uframes_t frames)
2277 {
2278 snd_pcm_runtime_t *runtime = substream->runtime;
2279 snd_pcm_sframes_t appl_ptr;
2280 snd_pcm_sframes_t ret;
2281 snd_pcm_sframes_t avail;
2282
2283 if (frames == 0)
2284 return 0;
2285
2286 snd_pcm_stream_lock_irq(substream);
2287 switch (runtime->status->state) {
2288 case SNDRV_PCM_STATE_PREPARED:
2289 case SNDRV_PCM_STATE_DRAINING:
2290 case SNDRV_PCM_STATE_PAUSED:
2291 break;
2292 case SNDRV_PCM_STATE_RUNNING:
2293 if (snd_pcm_update_hw_ptr(substream) >= 0)
2294 break;
2295 /* Fall through */
2296 case SNDRV_PCM_STATE_XRUN:
2297 ret = -EPIPE;
2298 goto __end;
2299 default:
2300 ret = -EBADFD;
2301 goto __end;
2302 }
2303
2304 avail = snd_pcm_capture_avail(runtime);
2305 if (avail <= 0) {
2306 ret = 0;
2307 goto __end;
2308 }
2309 if (frames > (snd_pcm_uframes_t)avail)
2310 frames = avail;
2311 else
2312 frames -= frames % runtime->xfer_align;
2313 appl_ptr = runtime->control->appl_ptr + frames;
2314 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2315 appl_ptr -= runtime->boundary;
2316 runtime->control->appl_ptr = appl_ptr;
2317 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2318 runtime->sleep_min)
2319 snd_pcm_tick_prepare(substream);
2320 ret = frames;
2321 __end:
2322 snd_pcm_stream_unlock_irq(substream);
2323 return ret;
2324 }
2325
2326 static int snd_pcm_hwsync(snd_pcm_substream_t *substream)
2327 {
2328 snd_pcm_runtime_t *runtime = substream->runtime;
2329 int err;
2330
2331 snd_pcm_stream_lock_irq(substream);
2332 switch (runtime->status->state) {
2333 case SNDRV_PCM_STATE_DRAINING:
2334 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2335 goto __badfd;
2336 case SNDRV_PCM_STATE_RUNNING:
2337 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2338 break;
2339 /* Fall through */
2340 case SNDRV_PCM_STATE_PREPARED:
2341 case SNDRV_PCM_STATE_SUSPENDED:
2342 err = 0;
2343 break;
2344 case SNDRV_PCM_STATE_XRUN:
2345 err = -EPIPE;
2346 break;
2347 default:
2348 __badfd:
2349 err = -EBADFD;
2350 break;
2351 }
2352 snd_pcm_stream_unlock_irq(substream);
2353 return err;
2354 }
2355
2356 static int snd_pcm_delay(snd_pcm_substream_t *substream, snd_pcm_sframes_t __user *res)
2357 {
2358 snd_pcm_runtime_t *runtime = substream->runtime;
2359 int err;
2360 snd_pcm_sframes_t n = 0;
2361
2362 snd_pcm_stream_lock_irq(substream);
2363 switch (runtime->status->state) {
2364 case SNDRV_PCM_STATE_DRAINING:
2365 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2366 goto __badfd;
2367 case SNDRV_PCM_STATE_RUNNING:
2368 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2369 break;
2370 /* Fall through */
2371 case SNDRV_PCM_STATE_PREPARED:
2372 case SNDRV_PCM_STATE_SUSPENDED:
2373 err = 0;
2374 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2375 n = snd_pcm_playback_hw_avail(runtime);
2376 else
2377 n = snd_pcm_capture_avail(runtime);
2378 break;
2379 case SNDRV_PCM_STATE_XRUN:
2380 err = -EPIPE;
2381 break;
2382 default:
2383 __badfd:
2384 err = -EBADFD;
2385 break;
2386 }
2387 snd_pcm_stream_unlock_irq(substream);
2388 if (!err)
2389 if (put_user(n, res))
2390 err = -EFAULT;
2391 return err;
2392 }
2393
2394 static int snd_pcm_sync_ptr(snd_pcm_substream_t *substream, struct sndrv_pcm_sync_ptr __user *_sync_ptr)
2395 {
2396 snd_pcm_runtime_t *runtime = substream->runtime;
2397 struct sndrv_pcm_sync_ptr sync_ptr;
2398 volatile struct sndrv_pcm_mmap_status *status;
2399 volatile struct sndrv_pcm_mmap_control *control;
2400 int err;
2401
2402 memset(&sync_ptr, 0, sizeof(sync_ptr));
2403 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2404 return -EFAULT;
2405 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct sndrv_pcm_mmap_control)))
2406 return -EFAULT;
2407 status = runtime->status;
2408 control = runtime->control;
2409 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2410 err = snd_pcm_hwsync(substream);
2411 if (err < 0)
2412 return err;
2413 }
2414 snd_pcm_stream_lock_irq(substream);
2415 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2416 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2417 else
2418 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2419 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2420 control->avail_min = sync_ptr.c.control.avail_min;
2421 else
2422 sync_ptr.c.control.avail_min = control->avail_min;
2423 sync_ptr.s.status.state = status->state;
2424 sync_ptr.s.status.hw_ptr = status->hw_ptr;
2425 sync_ptr.s.status.tstamp = status->tstamp;
2426 sync_ptr.s.status.suspended_state = status->suspended_state;
2427 snd_pcm_stream_unlock_irq(substream);
2428 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2429 return -EFAULT;
2430 return 0;
2431 }
2432
2433 static int snd_pcm_playback_ioctl1(snd_pcm_substream_t *substream,
2434 unsigned int cmd, void __user *arg);
2435 static int snd_pcm_capture_ioctl1(snd_pcm_substream_t *substream,
2436 unsigned int cmd, void __user *arg);
2437
2438 static int snd_pcm_common_ioctl1(snd_pcm_substream_t *substream,
2439 unsigned int cmd, void __user *arg)
2440 {
2441 snd_assert(substream != NULL, return -ENXIO);
2442
2443 switch (cmd) {
2444 case SNDRV_PCM_IOCTL_PVERSION:
2445 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2446 case SNDRV_PCM_IOCTL_INFO:
2447 return snd_pcm_info_user(substream, arg);
2448 case SNDRV_PCM_IOCTL_TSTAMP:
2449 {
2450 int xarg;
2451 if (get_user(xarg, (int __user *)arg))
2452 return -EFAULT;
2453 substream->runtime->tstamp_timespec = xarg ? 1 : 0;
2454 return 0;
2455 }
2456 case SNDRV_PCM_IOCTL_HW_REFINE:
2457 return snd_pcm_hw_refine_user(substream, arg);
2458 case SNDRV_PCM_IOCTL_HW_PARAMS:
2459 return snd_pcm_hw_params_user(substream, arg);
2460 case SNDRV_PCM_IOCTL_HW_FREE:
2461 return snd_pcm_hw_free(substream);
2462 case SNDRV_PCM_IOCTL_SW_PARAMS:
2463 return snd_pcm_sw_params_user(substream, arg);
2464 case SNDRV_PCM_IOCTL_STATUS:
2465 return snd_pcm_status_user(substream, arg);
2466 case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2467 return snd_pcm_channel_info_user(substream, arg);
2468 case SNDRV_PCM_IOCTL_PREPARE:
2469 return snd_pcm_prepare(substream);
2470 case SNDRV_PCM_IOCTL_RESET:
2471 return snd_pcm_reset(substream);
2472 case SNDRV_PCM_IOCTL_START:
2473 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2474 case SNDRV_PCM_IOCTL_LINK:
2475 return snd_pcm_link(substream, (int)(unsigned long) arg);
2476 case SNDRV_PCM_IOCTL_UNLINK:
2477 return snd_pcm_unlink(substream);
2478 case SNDRV_PCM_IOCTL_RESUME:
2479 return snd_pcm_resume(substream);
2480 case SNDRV_PCM_IOCTL_XRUN:
2481 return snd_pcm_xrun(substream);
2482 case SNDRV_PCM_IOCTL_HWSYNC:
2483 return snd_pcm_hwsync(substream);
2484 case SNDRV_PCM_IOCTL_DELAY:
2485 return snd_pcm_delay(substream, arg);
2486 case SNDRV_PCM_IOCTL_SYNC_PTR:
2487 return snd_pcm_sync_ptr(substream, arg);
2488 case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2489 return snd_pcm_hw_refine_old_user(substream, arg);
2490 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2491 return snd_pcm_hw_params_old_user(substream, arg);
2492 case SNDRV_PCM_IOCTL_DRAIN:
2493 return snd_pcm_drain(substream);
2494 case SNDRV_PCM_IOCTL_DROP:
2495 return snd_pcm_drop(substream);
2496 }
2497 snd_printd("unknown ioctl = 0x%x\n", cmd);
2498 return -ENOTTY;
2499 }
2500
2501 static int snd_pcm_playback_ioctl1(snd_pcm_substream_t *substream,
2502 unsigned int cmd, void __user *arg)
2503 {
2504 snd_assert(substream != NULL, return -ENXIO);
2505 snd_assert(substream->stream == SNDRV_PCM_STREAM_PLAYBACK, return -EINVAL);
2506 switch (cmd) {
2507 case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2508 {
2509 snd_xferi_t xferi;
2510 snd_xferi_t __user *_xferi = arg;
2511 snd_pcm_runtime_t *runtime = substream->runtime;
2512 snd_pcm_sframes_t result;
2513 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2514 return -EBADFD;
2515 if (put_user(0, &_xferi->result))
2516 return -EFAULT;
2517 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2518 return -EFAULT;
2519 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2520 __put_user(result, &_xferi->result);
2521 return result < 0 ? result : 0;
2522 }
2523 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2524 {
2525 snd_xfern_t xfern;
2526 snd_xfern_t __user *_xfern = arg;
2527 snd_pcm_runtime_t *runtime = substream->runtime;
2528 void __user **bufs;
2529 snd_pcm_sframes_t result;
2530 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2531 return -EBADFD;
2532 if (runtime->channels > 128)
2533 return -EINVAL;
2534 if (put_user(0, &_xfern->result))
2535 return -EFAULT;
2536 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2537 return -EFAULT;
2538 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL);
2539 if (bufs == NULL)
2540 return -ENOMEM;
2541 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) {
2542 kfree(bufs);
2543 return -EFAULT;
2544 }
2545 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2546 kfree(bufs);
2547 __put_user(result, &_xfern->result);
2548 return result < 0 ? result : 0;
2549 }
2550 case SNDRV_PCM_IOCTL_REWIND:
2551 {
2552 snd_pcm_uframes_t frames;
2553 snd_pcm_uframes_t __user *_frames = arg;
2554 snd_pcm_sframes_t result;
2555 if (get_user(frames, _frames))
2556 return -EFAULT;
2557 if (put_user(0, _frames))
2558 return -EFAULT;
2559 result = snd_pcm_playback_rewind(substream, frames);
2560 __put_user(result, _frames);
2561 return result < 0 ? result : 0;
2562 }
2563 case SNDRV_PCM_IOCTL_FORWARD:
2564 {
2565 snd_pcm_uframes_t frames;
2566 snd_pcm_uframes_t __user *_frames = arg;
2567 snd_pcm_sframes_t result;
2568 if (get_user(frames, _frames))
2569 return -EFAULT;
2570 if (put_user(0, _frames))
2571 return -EFAULT;
2572 result = snd_pcm_playback_forward(substream, frames);
2573 __put_user(result, _frames);
2574 return result < 0 ? result : 0;
2575 }
2576 case SNDRV_PCM_IOCTL_PAUSE:
2577 {
2578 int res;
2579 snd_pcm_stream_lock_irq(substream);
2580 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2581 snd_pcm_stream_unlock_irq(substream);
2582 return res;
2583 }
2584 }
2585 return snd_pcm_common_ioctl1(substream, cmd, arg);
2586 }
2587
2588 static int snd_pcm_capture_ioctl1(snd_pcm_substream_t *substream,
2589 unsigned int cmd, void __user *arg)
2590 {
2591 snd_assert(substream != NULL, return -ENXIO);
2592 snd_assert(substream->stream == SNDRV_PCM_STREAM_CAPTURE, return -EINVAL);
2593 switch (cmd) {
2594 case SNDRV_PCM_IOCTL_READI_FRAMES:
2595 {
2596 snd_xferi_t xferi;
2597 snd_xferi_t __user *_xferi = arg;
2598 snd_pcm_runtime_t *runtime = substream->runtime;
2599 snd_pcm_sframes_t result;
2600 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2601 return -EBADFD;
2602 if (put_user(0, &_xferi->result))
2603 return -EFAULT;
2604 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2605 return -EFAULT;
2606 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2607 __put_user(result, &_xferi->result);
2608 return result < 0 ? result : 0;
2609 }
2610 case SNDRV_PCM_IOCTL_READN_FRAMES:
2611 {
2612 snd_xfern_t xfern;
2613 snd_xfern_t __user *_xfern = arg;
2614 snd_pcm_runtime_t *runtime = substream->runtime;
2615 void *bufs;
2616 snd_pcm_sframes_t result;
2617 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2618 return -EBADFD;
2619 if (runtime->channels > 128)
2620 return -EINVAL;
2621 if (put_user(0, &_xfern->result))
2622 return -EFAULT;
2623 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2624 return -EFAULT;
2625 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL);
2626 if (bufs == NULL)
2627 return -ENOMEM;
2628 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) {
2629 kfree(bufs);
2630 return -EFAULT;
2631 }
2632 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2633 kfree(bufs);
2634 __put_user(result, &_xfern->result);
2635 return result < 0 ? result : 0;
2636 }
2637 case SNDRV_PCM_IOCTL_REWIND:
2638 {
2639 snd_pcm_uframes_t frames;
2640 snd_pcm_uframes_t __user *_frames = arg;
2641 snd_pcm_sframes_t result;
2642 if (get_user(frames, _frames))
2643 return -EFAULT;
2644 if (put_user(0, _frames))
2645 return -EFAULT;
2646 result = snd_pcm_capture_rewind(substream, frames);
2647 __put_user(result, _frames);
2648 return result < 0 ? result : 0;
2649 }
2650 case SNDRV_PCM_IOCTL_FORWARD:
2651 {
2652 snd_pcm_uframes_t frames;
2653 snd_pcm_uframes_t __user *_frames = arg;
2654 snd_pcm_sframes_t result;
2655 if (get_user(frames, _frames))
2656 return -EFAULT;
2657 if (put_user(0, _frames))
2658 return -EFAULT;
2659 result = snd_pcm_capture_forward(substream, frames);
2660 __put_user(result, _frames);
2661 return result < 0 ? result : 0;
2662 }
2663 }
2664 return snd_pcm_common_ioctl1(substream, cmd, arg);
2665 }
2666
2667 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2668 {
2669 snd_pcm_file_t *pcm_file;
2670
2671 pcm_file = file->private_data;
2672
2673 if (((cmd >> 8) & 0xff) != 'A')
2674 return -ENOTTY;
2675
2676 return snd_pcm_playback_ioctl1(pcm_file->substream, cmd, (void __user *)arg);
2677 }
2678
2679 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2680 {
2681 snd_pcm_file_t *pcm_file;
2682
2683 pcm_file = file->private_data;
2684
2685 if (((cmd >> 8) & 0xff) != 'A')
2686 return -ENOTTY;
2687
2688 return snd_pcm_capture_ioctl1(pcm_file->substream, cmd, (void __user *)arg);
2689 }
2690
2691 int snd_pcm_kernel_playback_ioctl(snd_pcm_substream_t *substream,
2692 unsigned int cmd, void *arg)
2693 {
2694 mm_segment_t fs;
2695 int result;
2696
2697 fs = snd_enter_user();
2698 result = snd_pcm_playback_ioctl1(substream, cmd, (void __user *)arg);
2699 snd_leave_user(fs);
2700 return result;
2701 }
2702
2703 int snd_pcm_kernel_capture_ioctl(snd_pcm_substream_t *substream,
2704 unsigned int cmd, void *arg)
2705 {
2706 mm_segment_t fs;
2707 int result;
2708
2709 fs = snd_enter_user();
2710 result = snd_pcm_capture_ioctl1(substream, cmd, (void __user *)arg);
2711 snd_leave_user(fs);
2712 return result;
2713 }
2714
2715 int snd_pcm_kernel_ioctl(snd_pcm_substream_t *substream,
2716 unsigned int cmd, void *arg)
2717 {
2718 switch (substream->stream) {
2719 case SNDRV_PCM_STREAM_PLAYBACK:
2720 return snd_pcm_kernel_playback_ioctl(substream, cmd, arg);
2721 case SNDRV_PCM_STREAM_CAPTURE:
2722 return snd_pcm_kernel_capture_ioctl(substream, cmd, arg);
2723 default:
2724 return -EINVAL;
2725 }
2726 }
2727
2728 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count, loff_t * offset)
2729 {
2730 snd_pcm_file_t *pcm_file;
2731 snd_pcm_substream_t *substream;
2732 snd_pcm_runtime_t *runtime;
2733 snd_pcm_sframes_t result;
2734
2735 pcm_file = file->private_data;
2736 substream = pcm_file->substream;
2737 snd_assert(substream != NULL, return -ENXIO);
2738 runtime = substream->runtime;
2739 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2740 return -EBADFD;
2741 if (!frame_aligned(runtime, count))
2742 return -EINVAL;
2743 count = bytes_to_frames(runtime, count);
2744 result = snd_pcm_lib_read(substream, buf, count);
2745 if (result > 0)
2746 result = frames_to_bytes(runtime, result);
2747 return result;
2748 }
2749
2750 static ssize_t snd_pcm_write(struct file *file, const char __user *buf, size_t count, loff_t * offset)
2751 {
2752 snd_pcm_file_t *pcm_file;
2753 snd_pcm_substream_t *substream;
2754 snd_pcm_runtime_t *runtime;
2755 snd_pcm_sframes_t result;
2756
2757 pcm_file = file->private_data;
2758 substream = pcm_file->substream;
2759 snd_assert(substream != NULL, result = -ENXIO; goto end);
2760 runtime = substream->runtime;
2761 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
2762 result = -EBADFD;
2763 goto end;
2764 }
2765 if (!frame_aligned(runtime, count)) {
2766 result = -EINVAL;
2767 goto end;
2768 }
2769 count = bytes_to_frames(runtime, count);
2770 result = snd_pcm_lib_write(substream, buf, count);
2771 if (result > 0)
2772 result = frames_to_bytes(runtime, result);
2773 end:
2774 return result;
2775 }
2776
2777 static ssize_t snd_pcm_readv(struct file *file, const struct iovec *_vector,
2778 unsigned long count, loff_t * offset)
2779
2780 {
2781 snd_pcm_file_t *pcm_file;
2782 snd_pcm_substream_t *substream;
2783 snd_pcm_runtime_t *runtime;
2784 snd_pcm_sframes_t result;
2785 unsigned long i;
2786 void __user **bufs;
2787 snd_pcm_uframes_t frames;
2788
2789 pcm_file = file->private_data;
2790 substream = pcm_file->substream;
2791 snd_assert(substream != NULL, return -ENXIO);
2792 runtime = substream->runtime;
2793 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2794 return -EBADFD;
2795 if (count > 1024 || count != runtime->channels)
2796 return -EINVAL;
2797 if (!frame_aligned(runtime, _vector->iov_len))
2798 return -EINVAL;
2799 frames = bytes_to_samples(runtime, _vector->iov_len);
2800 bufs = kmalloc(sizeof(void *) * count, GFP_KERNEL);
2801 if (bufs == NULL)
2802 return -ENOMEM;
2803 for (i = 0; i < count; ++i)
2804 bufs[i] = _vector[i].iov_base;
2805 result = snd_pcm_lib_readv(substream, bufs, frames);
2806 if (result > 0)
2807 result = frames_to_bytes(runtime, result);
2808 kfree(bufs);
2809 return result;
2810 }
2811
2812 static ssize_t snd_pcm_writev(struct file *file, const struct iovec *_vector,
2813 unsigned long count, loff_t * offset)
2814 {
2815 snd_pcm_file_t *pcm_file;
2816 snd_pcm_substream_t *substream;
2817 snd_pcm_runtime_t *runtime;
2818 snd_pcm_sframes_t result;
2819 unsigned long i;
2820 void __user **bufs;
2821 snd_pcm_uframes_t frames;
2822
2823 pcm_file = file->private_data;
2824 substream = pcm_file->substream;
2825 snd_assert(substream != NULL, result = -ENXIO; goto end);
2826 runtime = substream->runtime;
2827 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
2828 result = -EBADFD;
2829 goto end;
2830 }
2831 if (count > 128 || count != runtime->channels ||
2832 !frame_aligned(runtime, _vector->iov_len)) {
2833 result = -EINVAL;
2834 goto end;
2835 }
2836 frames = bytes_to_samples(runtime, _vector->iov_len);
2837 bufs = kmalloc(sizeof(void *) * count, GFP_KERNEL);
2838 if (bufs == NULL)
2839 return -ENOMEM;
2840 for (i = 0; i < count; ++i)
2841 bufs[i] = _vector[i].iov_base;
2842 result = snd_pcm_lib_writev(substream, bufs, frames);
2843 if (result > 0)
2844 result = frames_to_bytes(runtime, result);
2845 kfree(bufs);
2846 end:
2847 return result;
2848 }
2849
2850 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2851 {
2852 snd_pcm_file_t *pcm_file;
2853 snd_pcm_substream_t *substream;
2854 snd_pcm_runtime_t *runtime;
2855 unsigned int mask;
2856 snd_pcm_uframes_t avail;
2857
2858 pcm_file = file->private_data;
2859
2860 substream = pcm_file->substream;
2861 snd_assert(substream != NULL, return -ENXIO);
2862 runtime = substream->runtime;
2863
2864 poll_wait(file, &runtime->sleep, wait);
2865
2866 snd_pcm_stream_lock_irq(substream);
2867 avail = snd_pcm_playback_avail(runtime);
2868 switch (runtime->status->state) {
2869 case SNDRV_PCM_STATE_RUNNING:
2870 case SNDRV_PCM_STATE_PREPARED:
2871 case SNDRV_PCM_STATE_PAUSED:
2872 if (avail >= runtime->control->avail_min) {
2873 mask = POLLOUT | POLLWRNORM;
2874 break;
2875 }
2876 /* Fall through */
2877 case SNDRV_PCM_STATE_DRAINING:
2878 mask = 0;
2879 break;
2880 default:
2881 mask = POLLOUT | POLLWRNORM | POLLERR;
2882 break;
2883 }
2884 snd_pcm_stream_unlock_irq(substream);
2885 return mask;
2886 }
2887
2888 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2889 {
2890 snd_pcm_file_t *pcm_file;
2891 snd_pcm_substream_t *substream;
2892 snd_pcm_runtime_t *runtime;
2893 unsigned int mask;
2894 snd_pcm_uframes_t avail;
2895
2896 pcm_file = file->private_data;
2897
2898 substream = pcm_file->substream;
2899 snd_assert(substream != NULL, return -ENXIO);
2900 runtime = substream->runtime;
2901
2902 poll_wait(file, &runtime->sleep, wait);
2903
2904 snd_pcm_stream_lock_irq(substream);
2905 avail = snd_pcm_capture_avail(runtime);
2906 switch (runtime->status->state) {
2907 case SNDRV_PCM_STATE_RUNNING:
2908 case SNDRV_PCM_STATE_PREPARED:
2909 case SNDRV_PCM_STATE_PAUSED:
2910 if (avail >= runtime->control->avail_min) {
2911 mask = POLLIN | POLLRDNORM;
2912 break;
2913 }
2914 mask = 0;
2915 break;
2916 case SNDRV_PCM_STATE_DRAINING:
2917 if (avail > 0) {
2918 mask = POLLIN | POLLRDNORM;
2919 break;
2920 }
2921 /* Fall through */
2922 default:
2923 mask = POLLIN | POLLRDNORM | POLLERR;
2924 break;
2925 }
2926 snd_pcm_stream_unlock_irq(substream);
2927 return mask;
2928 }
2929
2930 /*
2931 * mmap support
2932 */
2933
2934 /*
2935 * Only on coherent architectures, we can mmap the status and the control records
2936 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
2937 */
2938 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
2939 /*
2940 * mmap status record
2941 */
2942 static struct page * snd_pcm_mmap_status_nopage(struct vm_area_struct *area, unsigned long address, int *type)
2943 {
2944 snd_pcm_substream_t *substream = (snd_pcm_substream_t *)area->vm_private_data;
2945 snd_pcm_runtime_t *runtime;
2946 struct page * page;
2947
2948 if (substream == NULL)
2949 return NOPAGE_OOM;
2950 runtime = substream->runtime;
2951 page = virt_to_page(runtime->status);
2952 get_page(page);
2953 if (type)
2954 *type = VM_FAULT_MINOR;
2955 return page;
2956 }
2957
2958 static struct vm_operations_struct snd_pcm_vm_ops_status =
2959 {
2960 .nopage = snd_pcm_mmap_status_nopage,
2961 };
2962
2963 static int snd_pcm_mmap_status(snd_pcm_substream_t *substream, struct file *file,
2964 struct vm_area_struct *area)
2965 {
2966 snd_pcm_runtime_t *runtime;
2967 long size;
2968 if (!(area->vm_flags & VM_READ))
2969 return -EINVAL;
2970 runtime = substream->runtime;
2971 snd_assert(runtime != NULL, return -EAGAIN);
2972 size = area->vm_end - area->vm_start;
2973 if (size != PAGE_ALIGN(sizeof(snd_pcm_mmap_status_t)))
2974 return -EINVAL;
2975 area->vm_ops = &snd_pcm_vm_ops_status;
2976 area->vm_private_data = substream;
2977 area->vm_flags |= VM_RESERVED;
2978 return 0;
2979 }
2980
2981 /*
2982 * mmap control record
2983 */
2984 static struct page * snd_pcm_mmap_control_nopage(struct vm_area_struct *area, unsigned long address, int *type)
2985 {
2986 snd_pcm_substream_t *substream = (snd_pcm_substream_t *)area->vm_private_data;
2987 snd_pcm_runtime_t *runtime;
2988 struct page * page;
2989
2990 if (substream == NULL)
2991 return NOPAGE_OOM;
2992 runtime = substream->runtime;
2993 page = virt_to_page(runtime->control);
2994 get_page(page);
2995 if (type)
2996 *type = VM_FAULT_MINOR;
2997 return page;
2998 }
2999
3000 static struct vm_operations_struct snd_pcm_vm_ops_control =
3001 {
3002 .nopage = snd_pcm_mmap_control_nopage,
3003 };
3004
3005 static int snd_pcm_mmap_control(snd_pcm_substream_t *substream, struct file *file,
3006 struct vm_area_struct *area)
3007 {
3008 snd_pcm_runtime_t *runtime;
3009 long size;
3010 if (!(area->vm_flags & VM_READ))
3011 return -EINVAL;
3012 runtime = substream->runtime;
3013 snd_assert(runtime != NULL, return -EAGAIN);
3014 size = area->vm_end - area->vm_start;
3015 if (size != PAGE_ALIGN(sizeof(snd_pcm_mmap_control_t)))
3016 return -EINVAL;
3017 area->vm_ops = &snd_pcm_vm_ops_control;
3018 area->vm_private_data = substream;
3019 area->vm_flags |= VM_RESERVED;
3020 return 0;
3021 }
3022 #else /* ! coherent mmap */
3023 /*
3024 * don't support mmap for status and control records.
3025 */
3026 static int snd_pcm_mmap_status(snd_pcm_substream_t *substream, struct file *file,
3027 struct vm_area_struct *area)
3028 {
3029 return -ENXIO;
3030 }
3031 static int snd_pcm_mmap_control(snd_pcm_substream_t *substream, struct file *file,
3032 struct vm_area_struct *area)
3033 {
3034 return -ENXIO;
3035 }
3036 #endif /* coherent mmap */
3037
3038 /*
3039 * nopage callback for mmapping a RAM page
3040 */
3041 static struct page *snd_pcm_mmap_data_nopage(struct vm_area_struct *area, unsigned long address, int *type)
3042 {
3043 snd_pcm_substream_t *substream = (snd_pcm_substream_t *)area->vm_private_data;
3044 snd_pcm_runtime_t *runtime;
3045 unsigned long offset;
3046 struct page * page;
3047 void *vaddr;
3048 size_t dma_bytes;
3049
3050 if (substream == NULL)
3051 return NOPAGE_OOM;
3052 runtime = substream->runtime;
3053 offset = area->vm_pgoff << PAGE_SHIFT;
3054 offset += address - area->vm_start;
3055 snd_assert((offset % PAGE_SIZE) == 0, return NOPAGE_OOM);
3056 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3057 if (offset > dma_bytes - PAGE_SIZE)
3058 return NOPAGE_SIGBUS;
3059 if (substream->ops->page) {
3060 page = substream->ops->page(substream, offset);
3061 if (! page)
3062 return NOPAGE_OOM;
3063 } else {
3064 vaddr = runtime->dma_area + offset;
3065 page = virt_to_page(vaddr);
3066 }
3067 get_page(page);
3068 if (type)
3069 *type = VM_FAULT_MINOR;
3070 return page;
3071 }
3072
3073 static struct vm_operations_struct snd_pcm_vm_ops_data =
3074 {
3075 .open = snd_pcm_mmap_data_open,
3076 .close = snd_pcm_mmap_data_close,
3077 .nopage = snd_pcm_mmap_data_nopage,
3078 };
3079
3080 /*
3081 * mmap the DMA buffer on RAM
3082 */
3083 static int snd_pcm_default_mmap(snd_pcm_substream_t *substream, struct vm_area_struct *area)
3084 {
3085 area->vm_ops = &snd_pcm_vm_ops_data;
3086 area->vm_private_data = substream;
3087 area->vm_flags |= VM_RESERVED;
3088 atomic_inc(&substream->runtime->mmap_count);
3089 return 0;
3090 }
3091
3092 /*
3093 * mmap the DMA buffer on I/O memory area
3094 */
3095 #if SNDRV_PCM_INFO_MMAP_IOMEM
3096 static struct vm_operations_struct snd_pcm_vm_ops_data_mmio =
3097 {
3098 .open = snd_pcm_mmap_data_open,
3099 .close = snd_pcm_mmap_data_close,
3100 };
3101
3102 int snd_pcm_lib_mmap_iomem(snd_pcm_substream_t *substream, struct vm_area_struct *area)
3103 {
3104 long size;
3105 unsigned long offset;
3106
3107 #ifdef pgprot_noncached
3108 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3109 #endif
3110 area->vm_ops = &snd_pcm_vm_ops_data_mmio;
3111 area->vm_private_data = substream;
3112 area->vm_flags |= VM_IO;
3113 size = area->vm_end - area->vm_start;
3114 offset = area->vm_pgoff << PAGE_SHIFT;
3115 if (io_remap_pfn_range(area, area->vm_start,
3116 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3117 size, area->vm_page_prot))
3118 return -EAGAIN;
3119 atomic_inc(&substream->runtime->mmap_count);
3120 return 0;
3121 }
3122 #endif /* SNDRV_PCM_INFO_MMAP */
3123
3124 /*
3125 * mmap DMA buffer
3126 */
3127 int snd_pcm_mmap_data(snd_pcm_substream_t *substream, struct file *file,
3128 struct vm_area_struct *area)
3129 {
3130 snd_pcm_runtime_t *runtime;
3131 long size;
3132 unsigned long offset;
3133 size_t dma_bytes;
3134
3135 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3136 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3137 return -EINVAL;
3138 } else {
3139 if (!(area->vm_flags & VM_READ))
3140 return -EINVAL;
3141 }
3142 runtime = substream->runtime;
3143 snd_assert(runtime != NULL, return -EAGAIN);
3144 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3145 return -EBADFD;
3146 if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3147 return -ENXIO;
3148 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3149 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3150 return -EINVAL;
3151 size = area->vm_end - area->vm_start;
3152 offset = area->vm_pgoff << PAGE_SHIFT;
3153 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3154 if ((size_t)size > dma_bytes)
3155 return -EINVAL;
3156 if (offset > dma_bytes - size)
3157 return -EINVAL;
3158
3159 if (substream->ops->mmap)
3160 return substream->ops->mmap(substream, area);
3161 else
3162 return snd_pcm_default_mmap(substream, area);
3163 }
3164
3165 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3166 {
3167 snd_pcm_file_t * pcm_file;
3168 snd_pcm_substream_t *substream;
3169 unsigned long offset;
3170
3171 pcm_file = file->private_data;
3172 substream = pcm_file->substream;
3173 snd_assert(substream != NULL, return -ENXIO);
3174
3175 offset = area->vm_pgoff << PAGE_SHIFT;
3176 switch (offset) {
3177 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3178 if (substream->no_mmap_ctrl)
3179 return -ENXIO;
3180 return snd_pcm_mmap_status(substream, file, area);
3181 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3182 if (substream->no_mmap_ctrl)
3183 return -ENXIO;
3184 return snd_pcm_mmap_control(substream, file, area);
3185 default:
3186 return snd_pcm_mmap_data(substream, file, area);
3187 }
3188 return 0;
3189 }
3190
3191 static int snd_pcm_fasync(int fd, struct file * file, int on)
3192 {
3193 snd_pcm_file_t * pcm_file;
3194 snd_pcm_substream_t *substream;
3195 snd_pcm_runtime_t *runtime;
3196 int err;
3197
3198 pcm_file = file->private_data;
3199 substream = pcm_file->substream;
3200 snd_assert(substream != NULL, return -ENXIO);
3201 runtime = substream->runtime;
3202
3203 err = fasync_helper(fd, file, on, &runtime->fasync);
3204 if (err < 0)
3205 return err;
3206 return 0;
3207 }
3208
3209 /*
3210 * ioctl32 compat
3211 */
3212 #ifdef CONFIG_COMPAT
3213 #include "pcm_compat.c"
3214 #else
3215 #define snd_pcm_ioctl_compat NULL
3216 #endif
3217
3218 /*
3219 * To be removed helpers to keep binary compatibility
3220 */
3221
3222 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3223 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3224
3225 static void snd_pcm_hw_convert_from_old_params(snd_pcm_hw_params_t *params, struct sndrv_pcm_hw_params_old *oparams)
3226 {
3227 unsigned int i;
3228
3229 memset(params, 0, sizeof(*params));
3230 params->flags = oparams->flags;
3231 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3232 params->masks[i].bits[0] = oparams->masks[i];
3233 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3234 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3235 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3236 params->info = oparams->info;
3237 params->msbits = oparams->msbits;
3238 params->rate_num = oparams->rate_num;
3239 params->rate_den = oparams->rate_den;
3240 params->fifo_size = oparams->fifo_size;
3241 }
3242
3243 static void snd_pcm_hw_convert_to_old_params(struct sndrv_pcm_hw_params_old *oparams, snd_pcm_hw_params_t *params)
3244 {
3245 unsigned int i;
3246
3247 memset(oparams, 0, sizeof(*oparams));
3248 oparams->flags = params->flags;
3249 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3250 oparams->masks[i] = params->masks[i].bits[0];
3251 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3252 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3253 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3254 oparams->info = params->info;
3255 oparams->msbits = params->msbits;
3256 oparams->rate_num = params->rate_num;
3257 oparams->rate_den = params->rate_den;
3258 oparams->fifo_size = params->fifo_size;
3259 }
3260
3261 static int snd_pcm_hw_refine_old_user(snd_pcm_substream_t * substream, struct sndrv_pcm_hw_params_old __user * _oparams)
3262 {
3263 snd_pcm_hw_params_t *params;
3264 struct sndrv_pcm_hw_params_old *oparams = NULL;
3265 int err;
3266
3267 params = kmalloc(sizeof(*params), GFP_KERNEL);
3268 if (!params) {
3269 err = -ENOMEM;
3270 goto out;
3271 }
3272 oparams = kmalloc(sizeof(*oparams), GFP_KERNEL);
3273 if (!oparams) {
3274 err = -ENOMEM;
3275 goto out;
3276 }
3277
3278 if (copy_from_user(oparams, _oparams, sizeof(*oparams))) {
3279 err = -EFAULT;
3280 goto out;
3281 }
3282 snd_pcm_hw_convert_from_old_params(params, oparams);
3283 err = snd_pcm_hw_refine(substream, params);
3284 snd_pcm_hw_convert_to_old_params(oparams, params);
3285 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3286 if (!err)
3287 err = -EFAULT;
3288 }
3289 out:
3290 kfree(params);
3291 kfree(oparams);
3292 return err;
3293 }
3294
3295 static int snd_pcm_hw_params_old_user(snd_pcm_substream_t * substream, struct sndrv_pcm_hw_params_old __user * _oparams)
3296 {
3297 snd_pcm_hw_params_t *params;
3298 struct sndrv_pcm_hw_params_old *oparams = NULL;
3299 int err;
3300
3301 params = kmalloc(sizeof(*params), GFP_KERNEL);
3302 if (!params) {
3303 err = -ENOMEM;
3304 goto out;
3305 }
3306 oparams = kmalloc(sizeof(*oparams), GFP_KERNEL);
3307 if (!oparams) {
3308 err = -ENOMEM;
3309 goto out;
3310 }
3311 if (copy_from_user(oparams, _oparams, sizeof(*oparams))) {
3312 err = -EFAULT;
3313 goto out;
3314 }
3315 snd_pcm_hw_convert_from_old_params(params, oparams);
3316 err = snd_pcm_hw_params(substream, params);
3317 snd_pcm_hw_convert_to_old_params(oparams, params);
3318 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3319 if (!err)
3320 err = -EFAULT;
3321 }
3322 out:
3323 kfree(params);
3324 kfree(oparams);
3325 return err;
3326 }
3327
3328 /*
3329 * Register section
3330 */
3331
3332 static struct file_operations snd_pcm_f_ops_playback = {
3333 .owner = THIS_MODULE,
3334 .write = snd_pcm_write,
3335 .writev = snd_pcm_writev,
3336 .open = snd_pcm_open,
3337 .release = snd_pcm_release,
3338 .poll = snd_pcm_playback_poll,
3339 .unlocked_ioctl = snd_pcm_playback_ioctl,
3340 .compat_ioctl = snd_pcm_ioctl_compat,
3341 .mmap = snd_pcm_mmap,
3342 .fasync = snd_pcm_fasync,
3343 };
3344
3345 static struct file_operations snd_pcm_f_ops_capture = {
3346 .owner = THIS_MODULE,
3347 .read = snd_pcm_read,
3348 .readv = snd_pcm_readv,
3349 .open = snd_pcm_open,
3350 .release = snd_pcm_release,
3351 .poll = snd_pcm_capture_poll,
3352 .unlocked_ioctl = snd_pcm_capture_ioctl,
3353 .compat_ioctl = snd_pcm_ioctl_compat,
3354 .mmap = snd_pcm_mmap,
3355 .fasync = snd_pcm_fasync,
3356 };
3357
3358 snd_minor_t snd_pcm_reg[2] =
3359 {
3360 {
3361 .comment = "digital audio playback",
3362 .f_ops = &snd_pcm_f_ops_playback,
3363 },
3364 {
3365 .comment = "digital audio capture",
3366 .f_ops = &snd_pcm_f_ops_capture,
3367 }
3368 };
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