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Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/hch/hfsplus
[linux-2.6/db.git] / sound / core / pcm_native.c
blobe82c1f97d99e9736b20523f7bf6eca63498f2587
1 /*
2 * Digital Audio (PCM) abstract layer
3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
22 #include <linux/mm.h>
23 #include <linux/file.h>
24 #include <linux/slab.h>
25 #include <linux/time.h>
26 #include <linux/pm_qos_params.h>
27 #include <linux/uio.h>
28 #include <linux/dma-mapping.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 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
38 #include <dma-coherence.h>
39 #endif
40
41 /*
42 * Compatibility
43 */
44
45 struct snd_pcm_hw_params_old {
46 unsigned int flags;
47 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
48 SNDRV_PCM_HW_PARAM_ACCESS + 1];
49 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
50 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
51 unsigned int rmask;
52 unsigned int cmask;
53 unsigned int info;
54 unsigned int msbits;
55 unsigned int rate_num;
56 unsigned int rate_den;
57 snd_pcm_uframes_t fifo_size;
58 unsigned char reserved[64];
59 };
60
61 #ifdef CONFIG_SND_SUPPORT_OLD_API
62 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
63 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
64
65 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
66 struct snd_pcm_hw_params_old __user * _oparams);
67 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
68 struct snd_pcm_hw_params_old __user * _oparams);
69 #endif
70 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
71
72 /*
73 *
74 */
75
76 DEFINE_RWLOCK(snd_pcm_link_rwlock);
77 EXPORT_SYMBOL(snd_pcm_link_rwlock);
78
79 static DECLARE_RWSEM(snd_pcm_link_rwsem);
80
81 static inline mm_segment_t snd_enter_user(void)
82 {
83 mm_segment_t fs = get_fs();
84 set_fs(get_ds());
85 return fs;
86 }
87
88 static inline void snd_leave_user(mm_segment_t fs)
89 {
90 set_fs(fs);
91 }
92
93
94
95 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
96 {
97 struct snd_pcm_runtime *runtime;
98 struct snd_pcm *pcm = substream->pcm;
99 struct snd_pcm_str *pstr = substream->pstr;
100
101 memset(info, 0, sizeof(*info));
102 info->card = pcm->card->number;
103 info->device = pcm->device;
104 info->stream = substream->stream;
105 info->subdevice = substream->number;
106 strlcpy(info->id, pcm->id, sizeof(info->id));
107 strlcpy(info->name, pcm->name, sizeof(info->name));
108 info->dev_class = pcm->dev_class;
109 info->dev_subclass = pcm->dev_subclass;
110 info->subdevices_count = pstr->substream_count;
111 info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
112 strlcpy(info->subname, substream->name, sizeof(info->subname));
113 runtime = substream->runtime;
114 /* AB: FIXME!!! This is definitely nonsense */
115 if (runtime) {
116 info->sync = runtime->sync;
117 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
118 }
119 return 0;
120 }
121
122 int snd_pcm_info_user(struct snd_pcm_substream *substream,
123 struct snd_pcm_info __user * _info)
124 {
125 struct snd_pcm_info *info;
126 int err;
127
128 info = kmalloc(sizeof(*info), GFP_KERNEL);
129 if (! info)
130 return -ENOMEM;
131 err = snd_pcm_info(substream, info);
132 if (err >= 0) {
133 if (copy_to_user(_info, info, sizeof(*info)))
134 err = -EFAULT;
135 }
136 kfree(info);
137 return err;
138 }
139
140 #undef RULES_DEBUG
141
142 #ifdef RULES_DEBUG
143 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
144 static const char * const snd_pcm_hw_param_names[] = {
145 HW_PARAM(ACCESS),
146 HW_PARAM(FORMAT),
147 HW_PARAM(SUBFORMAT),
148 HW_PARAM(SAMPLE_BITS),
149 HW_PARAM(FRAME_BITS),
150 HW_PARAM(CHANNELS),
151 HW_PARAM(RATE),
152 HW_PARAM(PERIOD_TIME),
153 HW_PARAM(PERIOD_SIZE),
154 HW_PARAM(PERIOD_BYTES),
155 HW_PARAM(PERIODS),
156 HW_PARAM(BUFFER_TIME),
157 HW_PARAM(BUFFER_SIZE),
158 HW_PARAM(BUFFER_BYTES),
159 HW_PARAM(TICK_TIME),
160 };
161 #endif
162
163 int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
164 struct snd_pcm_hw_params *params)
165 {
166 unsigned int k;
167 struct snd_pcm_hardware *hw;
168 struct snd_interval *i = NULL;
169 struct snd_mask *m = NULL;
170 struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
171 unsigned int rstamps[constrs->rules_num];
172 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
173 unsigned int stamp = 2;
174 int changed, again;
175
176 params->info = 0;
177 params->fifo_size = 0;
178 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
179 params->msbits = 0;
180 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
181 params->rate_num = 0;
182 params->rate_den = 0;
183 }
184
185 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
186 m = hw_param_mask(params, k);
187 if (snd_mask_empty(m))
188 return -EINVAL;
189 if (!(params->rmask & (1 << k)))
190 continue;
191 #ifdef RULES_DEBUG
192 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
193 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
194 #endif
195 changed = snd_mask_refine(m, constrs_mask(constrs, k));
196 #ifdef RULES_DEBUG
197 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
198 #endif
199 if (changed)
200 params->cmask |= 1 << k;
201 if (changed < 0)
202 return changed;
203 }
204
205 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
206 i = hw_param_interval(params, k);
207 if (snd_interval_empty(i))
208 return -EINVAL;
209 if (!(params->rmask & (1 << k)))
210 continue;
211 #ifdef RULES_DEBUG
212 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
213 if (i->empty)
214 printk("empty");
215 else
216 printk("%c%u %u%c",
217 i->openmin ? '(' : '[', i->min,
218 i->max, i->openmax ? ')' : ']');
219 printk(" -> ");
220 #endif
221 changed = snd_interval_refine(i, constrs_interval(constrs, k));
222 #ifdef RULES_DEBUG
223 if (i->empty)
224 printk("empty\n");
225 else
226 printk("%c%u %u%c\n",
227 i->openmin ? '(' : '[', i->min,
228 i->max, i->openmax ? ')' : ']');
229 #endif
230 if (changed)
231 params->cmask |= 1 << k;
232 if (changed < 0)
233 return changed;
234 }
235
236 for (k = 0; k < constrs->rules_num; k++)
237 rstamps[k] = 0;
238 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
239 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
240 do {
241 again = 0;
242 for (k = 0; k < constrs->rules_num; k++) {
243 struct snd_pcm_hw_rule *r = &constrs->rules[k];
244 unsigned int d;
245 int doit = 0;
246 if (r->cond && !(r->cond & params->flags))
247 continue;
248 for (d = 0; r->deps[d] >= 0; d++) {
249 if (vstamps[r->deps[d]] > rstamps[k]) {
250 doit = 1;
251 break;
252 }
253 }
254 if (!doit)
255 continue;
256 #ifdef RULES_DEBUG
257 printk(KERN_DEBUG "Rule %d [%p]: ", k, r->func);
258 if (r->var >= 0) {
259 printk("%s = ", snd_pcm_hw_param_names[r->var]);
260 if (hw_is_mask(r->var)) {
261 m = hw_param_mask(params, r->var);
262 printk("%x", *m->bits);
263 } else {
264 i = hw_param_interval(params, r->var);
265 if (i->empty)
266 printk("empty");
267 else
268 printk("%c%u %u%c",
269 i->openmin ? '(' : '[', i->min,
270 i->max, i->openmax ? ')' : ']');
271 }
272 }
273 #endif
274 changed = r->func(params, r);
275 #ifdef RULES_DEBUG
276 if (r->var >= 0) {
277 printk(" -> ");
278 if (hw_is_mask(r->var))
279 printk("%x", *m->bits);
280 else {
281 if (i->empty)
282 printk("empty");
283 else
284 printk("%c%u %u%c",
285 i->openmin ? '(' : '[', i->min,
286 i->max, i->openmax ? ')' : ']');
287 }
288 }
289 printk("\n");
290 #endif
291 rstamps[k] = stamp;
292 if (changed && r->var >= 0) {
293 params->cmask |= (1 << r->var);
294 vstamps[r->var] = stamp;
295 again = 1;
296 }
297 if (changed < 0)
298 return changed;
299 stamp++;
300 }
301 } while (again);
302 if (!params->msbits) {
303 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
304 if (snd_interval_single(i))
305 params->msbits = snd_interval_value(i);
306 }
307
308 if (!params->rate_den) {
309 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
310 if (snd_interval_single(i)) {
311 params->rate_num = snd_interval_value(i);
312 params->rate_den = 1;
313 }
314 }
315
316 hw = &substream->runtime->hw;
317 if (!params->info)
318 params->info = hw->info & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES;
319 if (!params->fifo_size) {
320 m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
321 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
322 if (snd_mask_min(m) == snd_mask_max(m) &&
323 snd_interval_min(i) == snd_interval_max(i)) {
324 changed = substream->ops->ioctl(substream,
325 SNDRV_PCM_IOCTL1_FIFO_SIZE, params);
326 if (changed < 0)
327 return changed;
328 }
329 }
330 params->rmask = 0;
331 return 0;
332 }
333
334 EXPORT_SYMBOL(snd_pcm_hw_refine);
335
336 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
337 struct snd_pcm_hw_params __user * _params)
338 {
339 struct snd_pcm_hw_params *params;
340 int err;
341
342 params = memdup_user(_params, sizeof(*params));
343 if (IS_ERR(params))
344 return PTR_ERR(params);
345
346 err = snd_pcm_hw_refine(substream, params);
347 if (copy_to_user(_params, params, sizeof(*params))) {
348 if (!err)
349 err = -EFAULT;
350 }
351
352 kfree(params);
353 return err;
354 }
355
356 static int period_to_usecs(struct snd_pcm_runtime *runtime)
357 {
358 int usecs;
359
360 if (! runtime->rate)
361 return -1; /* invalid */
362
363 /* take 75% of period time as the deadline */
364 usecs = (750000 / runtime->rate) * runtime->period_size;
365 usecs += ((750000 % runtime->rate) * runtime->period_size) /
366 runtime->rate;
367
368 return usecs;
369 }
370
371 static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
372 struct snd_pcm_hw_params *params)
373 {
374 struct snd_pcm_runtime *runtime;
375 int err, usecs;
376 unsigned int bits;
377 snd_pcm_uframes_t frames;
378
379 if (PCM_RUNTIME_CHECK(substream))
380 return -ENXIO;
381 runtime = substream->runtime;
382 snd_pcm_stream_lock_irq(substream);
383 switch (runtime->status->state) {
384 case SNDRV_PCM_STATE_OPEN:
385 case SNDRV_PCM_STATE_SETUP:
386 case SNDRV_PCM_STATE_PREPARED:
387 break;
388 default:
389 snd_pcm_stream_unlock_irq(substream);
390 return -EBADFD;
391 }
392 snd_pcm_stream_unlock_irq(substream);
393 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
394 if (!substream->oss.oss)
395 #endif
396 if (atomic_read(&substream->mmap_count))
397 return -EBADFD;
398
399 params->rmask = ~0U;
400 err = snd_pcm_hw_refine(substream, params);
401 if (err < 0)
402 goto _error;
403
404 err = snd_pcm_hw_params_choose(substream, params);
405 if (err < 0)
406 goto _error;
407
408 if (substream->ops->hw_params != NULL) {
409 err = substream->ops->hw_params(substream, params);
410 if (err < 0)
411 goto _error;
412 }
413
414 runtime->access = params_access(params);
415 runtime->format = params_format(params);
416 runtime->subformat = params_subformat(params);
417 runtime->channels = params_channels(params);
418 runtime->rate = params_rate(params);
419 runtime->period_size = params_period_size(params);
420 runtime->periods = params_periods(params);
421 runtime->buffer_size = params_buffer_size(params);
422 runtime->info = params->info;
423 runtime->rate_num = params->rate_num;
424 runtime->rate_den = params->rate_den;
425
426 bits = snd_pcm_format_physical_width(runtime->format);
427 runtime->sample_bits = bits;
428 bits *= runtime->channels;
429 runtime->frame_bits = bits;
430 frames = 1;
431 while (bits % 8 != 0) {
432 bits *= 2;
433 frames *= 2;
434 }
435 runtime->byte_align = bits / 8;
436 runtime->min_align = frames;
437
438 /* Default sw params */
439 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
440 runtime->period_step = 1;
441 runtime->control->avail_min = runtime->period_size;
442 runtime->start_threshold = 1;
443 runtime->stop_threshold = runtime->buffer_size;
444 runtime->silence_threshold = 0;
445 runtime->silence_size = 0;
446 runtime->boundary = runtime->buffer_size;
447 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
448 runtime->boundary *= 2;
449
450 snd_pcm_timer_resolution_change(substream);
451 runtime->status->state = SNDRV_PCM_STATE_SETUP;
452
453 if (pm_qos_request_active(&substream->latency_pm_qos_req))
454 pm_qos_remove_request(&substream->latency_pm_qos_req);
455 if ((usecs = period_to_usecs(runtime)) >= 0)
456 pm_qos_add_request(&substream->latency_pm_qos_req,
457 PM_QOS_CPU_DMA_LATENCY, usecs);
458 return 0;
459 _error:
460 /* hardware might be unuseable from this time,
461 so we force application to retry to set
462 the correct hardware parameter settings */
463 runtime->status->state = SNDRV_PCM_STATE_OPEN;
464 if (substream->ops->hw_free != NULL)
465 substream->ops->hw_free(substream);
466 return err;
467 }
468
469 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
470 struct snd_pcm_hw_params __user * _params)
471 {
472 struct snd_pcm_hw_params *params;
473 int err;
474
475 params = memdup_user(_params, sizeof(*params));
476 if (IS_ERR(params))
477 return PTR_ERR(params);
478
479 err = snd_pcm_hw_params(substream, params);
480 if (copy_to_user(_params, params, sizeof(*params))) {
481 if (!err)
482 err = -EFAULT;
483 }
484
485 kfree(params);
486 return err;
487 }
488
489 static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
490 {
491 struct snd_pcm_runtime *runtime;
492 int result = 0;
493
494 if (PCM_RUNTIME_CHECK(substream))
495 return -ENXIO;
496 runtime = substream->runtime;
497 snd_pcm_stream_lock_irq(substream);
498 switch (runtime->status->state) {
499 case SNDRV_PCM_STATE_SETUP:
500 case SNDRV_PCM_STATE_PREPARED:
501 break;
502 default:
503 snd_pcm_stream_unlock_irq(substream);
504 return -EBADFD;
505 }
506 snd_pcm_stream_unlock_irq(substream);
507 if (atomic_read(&substream->mmap_count))
508 return -EBADFD;
509 if (substream->ops->hw_free)
510 result = substream->ops->hw_free(substream);
511 runtime->status->state = SNDRV_PCM_STATE_OPEN;
512 pm_qos_remove_request(&substream->latency_pm_qos_req);
513 return result;
514 }
515
516 static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
517 struct snd_pcm_sw_params *params)
518 {
519 struct snd_pcm_runtime *runtime;
520 int err;
521
522 if (PCM_RUNTIME_CHECK(substream))
523 return -ENXIO;
524 runtime = substream->runtime;
525 snd_pcm_stream_lock_irq(substream);
526 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
527 snd_pcm_stream_unlock_irq(substream);
528 return -EBADFD;
529 }
530 snd_pcm_stream_unlock_irq(substream);
531
532 if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
533 return -EINVAL;
534 if (params->avail_min == 0)
535 return -EINVAL;
536 if (params->silence_size >= runtime->boundary) {
537 if (params->silence_threshold != 0)
538 return -EINVAL;
539 } else {
540 if (params->silence_size > params->silence_threshold)
541 return -EINVAL;
542 if (params->silence_threshold > runtime->buffer_size)
543 return -EINVAL;
544 }
545 err = 0;
546 snd_pcm_stream_lock_irq(substream);
547 runtime->tstamp_mode = params->tstamp_mode;
548 runtime->period_step = params->period_step;
549 runtime->control->avail_min = params->avail_min;
550 runtime->start_threshold = params->start_threshold;
551 runtime->stop_threshold = params->stop_threshold;
552 runtime->silence_threshold = params->silence_threshold;
553 runtime->silence_size = params->silence_size;
554 params->boundary = runtime->boundary;
555 if (snd_pcm_running(substream)) {
556 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
557 runtime->silence_size > 0)
558 snd_pcm_playback_silence(substream, ULONG_MAX);
559 err = snd_pcm_update_state(substream, runtime);
560 }
561 snd_pcm_stream_unlock_irq(substream);
562 return err;
563 }
564
565 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
566 struct snd_pcm_sw_params __user * _params)
567 {
568 struct snd_pcm_sw_params params;
569 int err;
570 if (copy_from_user(&params, _params, sizeof(params)))
571 return -EFAULT;
572 err = snd_pcm_sw_params(substream, &params);
573 if (copy_to_user(_params, &params, sizeof(params)))
574 return -EFAULT;
575 return err;
576 }
577
578 int snd_pcm_status(struct snd_pcm_substream *substream,
579 struct snd_pcm_status *status)
580 {
581 struct snd_pcm_runtime *runtime = substream->runtime;
582
583 snd_pcm_stream_lock_irq(substream);
584 status->state = runtime->status->state;
585 status->suspended_state = runtime->status->suspended_state;
586 if (status->state == SNDRV_PCM_STATE_OPEN)
587 goto _end;
588 status->trigger_tstamp = runtime->trigger_tstamp;
589 if (snd_pcm_running(substream)) {
590 snd_pcm_update_hw_ptr(substream);
591 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
592 status->tstamp = runtime->status->tstamp;
593 goto _tstamp_end;
594 }
595 }
596 snd_pcm_gettime(runtime, &status->tstamp);
597 _tstamp_end:
598 status->appl_ptr = runtime->control->appl_ptr;
599 status->hw_ptr = runtime->status->hw_ptr;
600 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
601 status->avail = snd_pcm_playback_avail(runtime);
602 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
603 runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
604 status->delay = runtime->buffer_size - status->avail;
605 status->delay += runtime->delay;
606 } else
607 status->delay = 0;
608 } else {
609 status->avail = snd_pcm_capture_avail(runtime);
610 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
611 status->delay = status->avail + runtime->delay;
612 else
613 status->delay = 0;
614 }
615 status->avail_max = runtime->avail_max;
616 status->overrange = runtime->overrange;
617 runtime->avail_max = 0;
618 runtime->overrange = 0;
619 _end:
620 snd_pcm_stream_unlock_irq(substream);
621 return 0;
622 }
623
624 static int snd_pcm_status_user(struct snd_pcm_substream *substream,
625 struct snd_pcm_status __user * _status)
626 {
627 struct snd_pcm_status status;
628 int res;
629
630 memset(&status, 0, sizeof(status));
631 res = snd_pcm_status(substream, &status);
632 if (res < 0)
633 return res;
634 if (copy_to_user(_status, &status, sizeof(status)))
635 return -EFAULT;
636 return 0;
637 }
638
639 static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
640 struct snd_pcm_channel_info * info)
641 {
642 struct snd_pcm_runtime *runtime;
643 unsigned int channel;
644
645 channel = info->channel;
646 runtime = substream->runtime;
647 snd_pcm_stream_lock_irq(substream);
648 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
649 snd_pcm_stream_unlock_irq(substream);
650 return -EBADFD;
651 }
652 snd_pcm_stream_unlock_irq(substream);
653 if (channel >= runtime->channels)
654 return -EINVAL;
655 memset(info, 0, sizeof(*info));
656 info->channel = channel;
657 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
658 }
659
660 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
661 struct snd_pcm_channel_info __user * _info)
662 {
663 struct snd_pcm_channel_info info;
664 int res;
665
666 if (copy_from_user(&info, _info, sizeof(info)))
667 return -EFAULT;
668 res = snd_pcm_channel_info(substream, &info);
669 if (res < 0)
670 return res;
671 if (copy_to_user(_info, &info, sizeof(info)))
672 return -EFAULT;
673 return 0;
674 }
675
676 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
677 {
678 struct snd_pcm_runtime *runtime = substream->runtime;
679 if (runtime->trigger_master == NULL)
680 return;
681 if (runtime->trigger_master == substream) {
682 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
683 } else {
684 snd_pcm_trigger_tstamp(runtime->trigger_master);
685 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
686 }
687 runtime->trigger_master = NULL;
688 }
689
690 struct action_ops {
691 int (*pre_action)(struct snd_pcm_substream *substream, int state);
692 int (*do_action)(struct snd_pcm_substream *substream, int state);
693 void (*undo_action)(struct snd_pcm_substream *substream, int state);
694 void (*post_action)(struct snd_pcm_substream *substream, int state);
695 };
696
697 /*
698 * this functions is core for handling of linked stream
699 * Note: the stream state might be changed also on failure
700 * Note2: call with calling stream lock + link lock
701 */
702 static int snd_pcm_action_group(struct action_ops *ops,
703 struct snd_pcm_substream *substream,
704 int state, int do_lock)
705 {
706 struct snd_pcm_substream *s = NULL;
707 struct snd_pcm_substream *s1;
708 int res = 0;
709
710 snd_pcm_group_for_each_entry(s, substream) {
711 if (do_lock && s != substream)
712 spin_lock_nested(&s->self_group.lock,
713 SINGLE_DEPTH_NESTING);
714 res = ops->pre_action(s, state);
715 if (res < 0)
716 goto _unlock;
717 }
718 snd_pcm_group_for_each_entry(s, substream) {
719 res = ops->do_action(s, state);
720 if (res < 0) {
721 if (ops->undo_action) {
722 snd_pcm_group_for_each_entry(s1, substream) {
723 if (s1 == s) /* failed stream */
724 break;
725 ops->undo_action(s1, state);
726 }
727 }
728 s = NULL; /* unlock all */
729 goto _unlock;
730 }
731 }
732 snd_pcm_group_for_each_entry(s, substream) {
733 ops->post_action(s, state);
734 }
735 _unlock:
736 if (do_lock) {
737 /* unlock streams */
738 snd_pcm_group_for_each_entry(s1, substream) {
739 if (s1 != substream)
740 spin_unlock(&s1->self_group.lock);
741 if (s1 == s) /* end */
742 break;
743 }
744 }
745 return res;
746 }
747
748 /*
749 * Note: call with stream lock
750 */
751 static int snd_pcm_action_single(struct action_ops *ops,
752 struct snd_pcm_substream *substream,
753 int state)
754 {
755 int res;
756
757 res = ops->pre_action(substream, state);
758 if (res < 0)
759 return res;
760 res = ops->do_action(substream, state);
761 if (res == 0)
762 ops->post_action(substream, state);
763 else if (ops->undo_action)
764 ops->undo_action(substream, state);
765 return res;
766 }
767
768 /*
769 * Note: call with stream lock
770 */
771 static int snd_pcm_action(struct action_ops *ops,
772 struct snd_pcm_substream *substream,
773 int state)
774 {
775 int res;
776
777 if (snd_pcm_stream_linked(substream)) {
778 if (!spin_trylock(&substream->group->lock)) {
779 spin_unlock(&substream->self_group.lock);
780 spin_lock(&substream->group->lock);
781 spin_lock(&substream->self_group.lock);
782 }
783 res = snd_pcm_action_group(ops, substream, state, 1);
784 spin_unlock(&substream->group->lock);
785 } else {
786 res = snd_pcm_action_single(ops, substream, state);
787 }
788 return res;
789 }
790
791 /*
792 * Note: don't use any locks before
793 */
794 static int snd_pcm_action_lock_irq(struct action_ops *ops,
795 struct snd_pcm_substream *substream,
796 int state)
797 {
798 int res;
799
800 read_lock_irq(&snd_pcm_link_rwlock);
801 if (snd_pcm_stream_linked(substream)) {
802 spin_lock(&substream->group->lock);
803 spin_lock(&substream->self_group.lock);
804 res = snd_pcm_action_group(ops, substream, state, 1);
805 spin_unlock(&substream->self_group.lock);
806 spin_unlock(&substream->group->lock);
807 } else {
808 spin_lock(&substream->self_group.lock);
809 res = snd_pcm_action_single(ops, substream, state);
810 spin_unlock(&substream->self_group.lock);
811 }
812 read_unlock_irq(&snd_pcm_link_rwlock);
813 return res;
814 }
815
816 /*
817 */
818 static int snd_pcm_action_nonatomic(struct action_ops *ops,
819 struct snd_pcm_substream *substream,
820 int state)
821 {
822 int res;
823
824 down_read(&snd_pcm_link_rwsem);
825 if (snd_pcm_stream_linked(substream))
826 res = snd_pcm_action_group(ops, substream, state, 0);
827 else
828 res = snd_pcm_action_single(ops, substream, state);
829 up_read(&snd_pcm_link_rwsem);
830 return res;
831 }
832
833 /*
834 * start callbacks
835 */
836 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
837 {
838 struct snd_pcm_runtime *runtime = substream->runtime;
839 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
840 return -EBADFD;
841 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
842 !snd_pcm_playback_data(substream))
843 return -EPIPE;
844 runtime->trigger_master = substream;
845 return 0;
846 }
847
848 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
849 {
850 if (substream->runtime->trigger_master != substream)
851 return 0;
852 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
853 }
854
855 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
856 {
857 if (substream->runtime->trigger_master == substream)
858 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
859 }
860
861 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
862 {
863 struct snd_pcm_runtime *runtime = substream->runtime;
864 snd_pcm_trigger_tstamp(substream);
865 runtime->hw_ptr_jiffies = jiffies;
866 runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) /
867 runtime->rate;
868 runtime->status->state = state;
869 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
870 runtime->silence_size > 0)
871 snd_pcm_playback_silence(substream, ULONG_MAX);
872 if (substream->timer)
873 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
874 &runtime->trigger_tstamp);
875 }
876
877 static struct action_ops snd_pcm_action_start = {
878 .pre_action = snd_pcm_pre_start,
879 .do_action = snd_pcm_do_start,
880 .undo_action = snd_pcm_undo_start,
881 .post_action = snd_pcm_post_start
882 };
883
884 /**
885 * snd_pcm_start - start all linked streams
886 * @substream: the PCM substream instance
887 */
888 int snd_pcm_start(struct snd_pcm_substream *substream)
889 {
890 return snd_pcm_action(&snd_pcm_action_start, substream,
891 SNDRV_PCM_STATE_RUNNING);
892 }
893
894 /*
895 * stop callbacks
896 */
897 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
898 {
899 struct snd_pcm_runtime *runtime = substream->runtime;
900 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
901 return -EBADFD;
902 runtime->trigger_master = substream;
903 return 0;
904 }
905
906 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
907 {
908 if (substream->runtime->trigger_master == substream &&
909 snd_pcm_running(substream))
910 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
911 return 0; /* unconditonally stop all substreams */
912 }
913
914 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
915 {
916 struct snd_pcm_runtime *runtime = substream->runtime;
917 if (runtime->status->state != state) {
918 snd_pcm_trigger_tstamp(substream);
919 if (substream->timer)
920 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
921 &runtime->trigger_tstamp);
922 runtime->status->state = state;
923 }
924 wake_up(&runtime->sleep);
925 wake_up(&runtime->tsleep);
926 }
927
928 static struct action_ops snd_pcm_action_stop = {
929 .pre_action = snd_pcm_pre_stop,
930 .do_action = snd_pcm_do_stop,
931 .post_action = snd_pcm_post_stop
932 };
933
934 /**
935 * snd_pcm_stop - try to stop all running streams in the substream group
936 * @substream: the PCM substream instance
937 * @state: PCM state after stopping the stream
938 *
939 * The state of each stream is then changed to the given state unconditionally.
940 */
941 int snd_pcm_stop(struct snd_pcm_substream *substream, int state)
942 {
943 return snd_pcm_action(&snd_pcm_action_stop, substream, state);
944 }
945
946 EXPORT_SYMBOL(snd_pcm_stop);
947
948 /**
949 * snd_pcm_drain_done - stop the DMA only when the given stream is playback
950 * @substream: the PCM substream
951 *
952 * After stopping, the state is changed to SETUP.
953 * Unlike snd_pcm_stop(), this affects only the given stream.
954 */
955 int snd_pcm_drain_done(struct snd_pcm_substream *substream)
956 {
957 return snd_pcm_action_single(&snd_pcm_action_stop, substream,
958 SNDRV_PCM_STATE_SETUP);
959 }
960
961 /*
962 * pause callbacks
963 */
964 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
965 {
966 struct snd_pcm_runtime *runtime = substream->runtime;
967 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
968 return -ENOSYS;
969 if (push) {
970 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
971 return -EBADFD;
972 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
973 return -EBADFD;
974 runtime->trigger_master = substream;
975 return 0;
976 }
977
978 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
979 {
980 if (substream->runtime->trigger_master != substream)
981 return 0;
982 /* some drivers might use hw_ptr to recover from the pause -
983 update the hw_ptr now */
984 if (push)
985 snd_pcm_update_hw_ptr(substream);
986 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
987 * a delta betwen the current jiffies, this gives a large enough
988 * delta, effectively to skip the check once.
989 */
990 substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
991 return substream->ops->trigger(substream,
992 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
993 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
994 }
995
996 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
997 {
998 if (substream->runtime->trigger_master == substream)
999 substream->ops->trigger(substream,
1000 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
1001 SNDRV_PCM_TRIGGER_PAUSE_PUSH);
1002 }
1003
1004 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
1005 {
1006 struct snd_pcm_runtime *runtime = substream->runtime;
1007 snd_pcm_trigger_tstamp(substream);
1008 if (push) {
1009 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1010 if (substream->timer)
1011 snd_timer_notify(substream->timer,
1012 SNDRV_TIMER_EVENT_MPAUSE,
1013 &runtime->trigger_tstamp);
1014 wake_up(&runtime->sleep);
1015 wake_up(&runtime->tsleep);
1016 } else {
1017 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1018 if (substream->timer)
1019 snd_timer_notify(substream->timer,
1020 SNDRV_TIMER_EVENT_MCONTINUE,
1021 &runtime->trigger_tstamp);
1022 }
1023 }
1024
1025 static struct action_ops snd_pcm_action_pause = {
1026 .pre_action = snd_pcm_pre_pause,
1027 .do_action = snd_pcm_do_pause,
1028 .undo_action = snd_pcm_undo_pause,
1029 .post_action = snd_pcm_post_pause
1030 };
1031
1032 /*
1033 * Push/release the pause for all linked streams.
1034 */
1035 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1036 {
1037 return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1038 }
1039
1040 #ifdef CONFIG_PM
1041 /* suspend */
1042
1043 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1044 {
1045 struct snd_pcm_runtime *runtime = substream->runtime;
1046 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1047 return -EBUSY;
1048 runtime->trigger_master = substream;
1049 return 0;
1050 }
1051
1052 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1053 {
1054 struct snd_pcm_runtime *runtime = substream->runtime;
1055 if (runtime->trigger_master != substream)
1056 return 0;
1057 if (! snd_pcm_running(substream))
1058 return 0;
1059 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1060 return 0; /* suspend unconditionally */
1061 }
1062
1063 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1064 {
1065 struct snd_pcm_runtime *runtime = substream->runtime;
1066 snd_pcm_trigger_tstamp(substream);
1067 if (substream->timer)
1068 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1069 &runtime->trigger_tstamp);
1070 runtime->status->suspended_state = runtime->status->state;
1071 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1072 wake_up(&runtime->sleep);
1073 wake_up(&runtime->tsleep);
1074 }
1075
1076 static struct action_ops snd_pcm_action_suspend = {
1077 .pre_action = snd_pcm_pre_suspend,
1078 .do_action = snd_pcm_do_suspend,
1079 .post_action = snd_pcm_post_suspend
1080 };
1081
1082 /**
1083 * snd_pcm_suspend - trigger SUSPEND to all linked streams
1084 * @substream: the PCM substream
1085 *
1086 * After this call, all streams are changed to SUSPENDED state.
1087 */
1088 int snd_pcm_suspend(struct snd_pcm_substream *substream)
1089 {
1090 int err;
1091 unsigned long flags;
1092
1093 if (! substream)
1094 return 0;
1095
1096 snd_pcm_stream_lock_irqsave(substream, flags);
1097 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1098 snd_pcm_stream_unlock_irqrestore(substream, flags);
1099 return err;
1100 }
1101
1102 EXPORT_SYMBOL(snd_pcm_suspend);
1103
1104 /**
1105 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
1106 * @pcm: the PCM instance
1107 *
1108 * After this call, all streams are changed to SUSPENDED state.
1109 */
1110 int snd_pcm_suspend_all(struct snd_pcm *pcm)
1111 {
1112 struct snd_pcm_substream *substream;
1113 int stream, err = 0;
1114
1115 if (! pcm)
1116 return 0;
1117
1118 for (stream = 0; stream < 2; stream++) {
1119 for (substream = pcm->streams[stream].substream;
1120 substream; substream = substream->next) {
1121 /* FIXME: the open/close code should lock this as well */
1122 if (substream->runtime == NULL)
1123 continue;
1124 err = snd_pcm_suspend(substream);
1125 if (err < 0 && err != -EBUSY)
1126 return err;
1127 }
1128 }
1129 return 0;
1130 }
1131
1132 EXPORT_SYMBOL(snd_pcm_suspend_all);
1133
1134 /* resume */
1135
1136 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1137 {
1138 struct snd_pcm_runtime *runtime = substream->runtime;
1139 if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1140 return -ENOSYS;
1141 runtime->trigger_master = substream;
1142 return 0;
1143 }
1144
1145 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1146 {
1147 struct snd_pcm_runtime *runtime = substream->runtime;
1148 if (runtime->trigger_master != substream)
1149 return 0;
1150 /* DMA not running previously? */
1151 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1152 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1153 substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1154 return 0;
1155 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1156 }
1157
1158 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1159 {
1160 if (substream->runtime->trigger_master == substream &&
1161 snd_pcm_running(substream))
1162 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1163 }
1164
1165 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1166 {
1167 struct snd_pcm_runtime *runtime = substream->runtime;
1168 snd_pcm_trigger_tstamp(substream);
1169 if (substream->timer)
1170 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1171 &runtime->trigger_tstamp);
1172 runtime->status->state = runtime->status->suspended_state;
1173 }
1174
1175 static struct action_ops snd_pcm_action_resume = {
1176 .pre_action = snd_pcm_pre_resume,
1177 .do_action = snd_pcm_do_resume,
1178 .undo_action = snd_pcm_undo_resume,
1179 .post_action = snd_pcm_post_resume
1180 };
1181
1182 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1183 {
1184 struct snd_card *card = substream->pcm->card;
1185 int res;
1186
1187 snd_power_lock(card);
1188 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1189 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1190 snd_power_unlock(card);
1191 return res;
1192 }
1193
1194 #else
1195
1196 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1197 {
1198 return -ENOSYS;
1199 }
1200
1201 #endif /* CONFIG_PM */
1202
1203 /*
1204 * xrun ioctl
1205 *
1206 * Change the RUNNING stream(s) to XRUN state.
1207 */
1208 static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1209 {
1210 struct snd_card *card = substream->pcm->card;
1211 struct snd_pcm_runtime *runtime = substream->runtime;
1212 int result;
1213
1214 snd_power_lock(card);
1215 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1216 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1217 if (result < 0)
1218 goto _unlock;
1219 }
1220
1221 snd_pcm_stream_lock_irq(substream);
1222 switch (runtime->status->state) {
1223 case SNDRV_PCM_STATE_XRUN:
1224 result = 0; /* already there */
1225 break;
1226 case SNDRV_PCM_STATE_RUNNING:
1227 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1228 break;
1229 default:
1230 result = -EBADFD;
1231 }
1232 snd_pcm_stream_unlock_irq(substream);
1233 _unlock:
1234 snd_power_unlock(card);
1235 return result;
1236 }
1237
1238 /*
1239 * reset ioctl
1240 */
1241 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1242 {
1243 struct snd_pcm_runtime *runtime = substream->runtime;
1244 switch (runtime->status->state) {
1245 case SNDRV_PCM_STATE_RUNNING:
1246 case SNDRV_PCM_STATE_PREPARED:
1247 case SNDRV_PCM_STATE_PAUSED:
1248 case SNDRV_PCM_STATE_SUSPENDED:
1249 return 0;
1250 default:
1251 return -EBADFD;
1252 }
1253 }
1254
1255 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1256 {
1257 struct snd_pcm_runtime *runtime = substream->runtime;
1258 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1259 if (err < 0)
1260 return err;
1261 runtime->hw_ptr_base = 0;
1262 runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1263 runtime->status->hw_ptr % runtime->period_size;
1264 runtime->silence_start = runtime->status->hw_ptr;
1265 runtime->silence_filled = 0;
1266 return 0;
1267 }
1268
1269 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1270 {
1271 struct snd_pcm_runtime *runtime = substream->runtime;
1272 runtime->control->appl_ptr = runtime->status->hw_ptr;
1273 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1274 runtime->silence_size > 0)
1275 snd_pcm_playback_silence(substream, ULONG_MAX);
1276 }
1277
1278 static struct action_ops snd_pcm_action_reset = {
1279 .pre_action = snd_pcm_pre_reset,
1280 .do_action = snd_pcm_do_reset,
1281 .post_action = snd_pcm_post_reset
1282 };
1283
1284 static int snd_pcm_reset(struct snd_pcm_substream *substream)
1285 {
1286 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1287 }
1288
1289 /*
1290 * prepare ioctl
1291 */
1292 /* we use the second argument for updating f_flags */
1293 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1294 int f_flags)
1295 {
1296 struct snd_pcm_runtime *runtime = substream->runtime;
1297 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1298 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1299 return -EBADFD;
1300 if (snd_pcm_running(substream))
1301 return -EBUSY;
1302 substream->f_flags = f_flags;
1303 return 0;
1304 }
1305
1306 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1307 {
1308 int err;
1309 err = substream->ops->prepare(substream);
1310 if (err < 0)
1311 return err;
1312 return snd_pcm_do_reset(substream, 0);
1313 }
1314
1315 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1316 {
1317 struct snd_pcm_runtime *runtime = substream->runtime;
1318 runtime->control->appl_ptr = runtime->status->hw_ptr;
1319 runtime->status->state = SNDRV_PCM_STATE_PREPARED;
1320 }
1321
1322 static struct action_ops snd_pcm_action_prepare = {
1323 .pre_action = snd_pcm_pre_prepare,
1324 .do_action = snd_pcm_do_prepare,
1325 .post_action = snd_pcm_post_prepare
1326 };
1327
1328 /**
1329 * snd_pcm_prepare - prepare the PCM substream to be triggerable
1330 * @substream: the PCM substream instance
1331 * @file: file to refer f_flags
1332 */
1333 static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1334 struct file *file)
1335 {
1336 int res;
1337 struct snd_card *card = substream->pcm->card;
1338 int f_flags;
1339
1340 if (file)
1341 f_flags = file->f_flags;
1342 else
1343 f_flags = substream->f_flags;
1344
1345 snd_power_lock(card);
1346 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1347 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1348 substream, f_flags);
1349 snd_power_unlock(card);
1350 return res;
1351 }
1352
1353 /*
1354 * drain ioctl
1355 */
1356
1357 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1358 {
1359 substream->runtime->trigger_master = substream;
1360 return 0;
1361 }
1362
1363 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1364 {
1365 struct snd_pcm_runtime *runtime = substream->runtime;
1366 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1367 switch (runtime->status->state) {
1368 case SNDRV_PCM_STATE_PREPARED:
1369 /* start playback stream if possible */
1370 if (! snd_pcm_playback_empty(substream)) {
1371 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1372 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1373 }
1374 break;
1375 case SNDRV_PCM_STATE_RUNNING:
1376 runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1377 break;
1378 default:
1379 break;
1380 }
1381 } else {
1382 /* stop running stream */
1383 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1384 int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1385 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1386 snd_pcm_do_stop(substream, new_state);
1387 snd_pcm_post_stop(substream, new_state);
1388 }
1389 }
1390 return 0;
1391 }
1392
1393 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1394 {
1395 }
1396
1397 static struct action_ops snd_pcm_action_drain_init = {
1398 .pre_action = snd_pcm_pre_drain_init,
1399 .do_action = snd_pcm_do_drain_init,
1400 .post_action = snd_pcm_post_drain_init
1401 };
1402
1403 static int snd_pcm_drop(struct snd_pcm_substream *substream);
1404
1405 /*
1406 * Drain the stream(s).
1407 * When the substream is linked, sync until the draining of all playback streams
1408 * is finished.
1409 * After this call, all streams are supposed to be either SETUP or DRAINING
1410 * (capture only) state.
1411 */
1412 static int snd_pcm_drain(struct snd_pcm_substream *substream,
1413 struct file *file)
1414 {
1415 struct snd_card *card;
1416 struct snd_pcm_runtime *runtime;
1417 struct snd_pcm_substream *s;
1418 wait_queue_t wait;
1419 int result = 0;
1420 int nonblock = 0;
1421
1422 card = substream->pcm->card;
1423 runtime = substream->runtime;
1424
1425 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1426 return -EBADFD;
1427
1428 snd_power_lock(card);
1429 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1430 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1431 if (result < 0) {
1432 snd_power_unlock(card);
1433 return result;
1434 }
1435 }
1436
1437 if (file) {
1438 if (file->f_flags & O_NONBLOCK)
1439 nonblock = 1;
1440 } else if (substream->f_flags & O_NONBLOCK)
1441 nonblock = 1;
1442
1443 down_read(&snd_pcm_link_rwsem);
1444 snd_pcm_stream_lock_irq(substream);
1445 /* resume pause */
1446 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1447 snd_pcm_pause(substream, 0);
1448
1449 /* pre-start/stop - all running streams are changed to DRAINING state */
1450 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1451 if (result < 0)
1452 goto unlock;
1453 /* in non-blocking, we don't wait in ioctl but let caller poll */
1454 if (nonblock) {
1455 result = -EAGAIN;
1456 goto unlock;
1457 }
1458
1459 for (;;) {
1460 long tout;
1461 struct snd_pcm_runtime *to_check;
1462 if (signal_pending(current)) {
1463 result = -ERESTARTSYS;
1464 break;
1465 }
1466 /* find a substream to drain */
1467 to_check = NULL;
1468 snd_pcm_group_for_each_entry(s, substream) {
1469 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1470 continue;
1471 runtime = s->runtime;
1472 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1473 to_check = runtime;
1474 break;
1475 }
1476 }
1477 if (!to_check)
1478 break; /* all drained */
1479 init_waitqueue_entry(&wait, current);
1480 add_wait_queue(&to_check->sleep, &wait);
1481 set_current_state(TASK_INTERRUPTIBLE);
1482 snd_pcm_stream_unlock_irq(substream);
1483 up_read(&snd_pcm_link_rwsem);
1484 snd_power_unlock(card);
1485 tout = schedule_timeout(10 * HZ);
1486 snd_power_lock(card);
1487 down_read(&snd_pcm_link_rwsem);
1488 snd_pcm_stream_lock_irq(substream);
1489 remove_wait_queue(&to_check->sleep, &wait);
1490 if (tout == 0) {
1491 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1492 result = -ESTRPIPE;
1493 else {
1494 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1495 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1496 result = -EIO;
1497 }
1498 break;
1499 }
1500 }
1501
1502 unlock:
1503 snd_pcm_stream_unlock_irq(substream);
1504 up_read(&snd_pcm_link_rwsem);
1505 snd_power_unlock(card);
1506
1507 return result;
1508 }
1509
1510 /*
1511 * drop ioctl
1512 *
1513 * Immediately put all linked substreams into SETUP state.
1514 */
1515 static int snd_pcm_drop(struct snd_pcm_substream *substream)
1516 {
1517 struct snd_pcm_runtime *runtime;
1518 struct snd_card *card;
1519 int result = 0;
1520
1521 if (PCM_RUNTIME_CHECK(substream))
1522 return -ENXIO;
1523 runtime = substream->runtime;
1524 card = substream->pcm->card;
1525
1526 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1527 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1528 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1529 return -EBADFD;
1530
1531 snd_pcm_stream_lock_irq(substream);
1532 /* resume pause */
1533 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1534 snd_pcm_pause(substream, 0);
1535
1536 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1537 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1538 snd_pcm_stream_unlock_irq(substream);
1539
1540 return result;
1541 }
1542
1543
1544 /* WARNING: Don't forget to fput back the file */
1545 static struct file *snd_pcm_file_fd(int fd)
1546 {
1547 struct file *file;
1548 struct inode *inode;
1549 unsigned int minor;
1550
1551 file = fget(fd);
1552 if (!file)
1553 return NULL;
1554 inode = file->f_path.dentry->d_inode;
1555 if (!S_ISCHR(inode->i_mode) ||
1556 imajor(inode) != snd_major) {
1557 fput(file);
1558 return NULL;
1559 }
1560 minor = iminor(inode);
1561 if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) &&
1562 !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) {
1563 fput(file);
1564 return NULL;
1565 }
1566 return file;
1567 }
1568
1569 /*
1570 * PCM link handling
1571 */
1572 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1573 {
1574 int res = 0;
1575 struct file *file;
1576 struct snd_pcm_file *pcm_file;
1577 struct snd_pcm_substream *substream1;
1578
1579 file = snd_pcm_file_fd(fd);
1580 if (!file)
1581 return -EBADFD;
1582 pcm_file = file->private_data;
1583 substream1 = pcm_file->substream;
1584 down_write(&snd_pcm_link_rwsem);
1585 write_lock_irq(&snd_pcm_link_rwlock);
1586 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1587 substream->runtime->status->state != substream1->runtime->status->state) {
1588 res = -EBADFD;
1589 goto _end;
1590 }
1591 if (snd_pcm_stream_linked(substream1)) {
1592 res = -EALREADY;
1593 goto _end;
1594 }
1595 if (!snd_pcm_stream_linked(substream)) {
1596 substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC);
1597 if (substream->group == NULL) {
1598 res = -ENOMEM;
1599 goto _end;
1600 }
1601 spin_lock_init(&substream->group->lock);
1602 INIT_LIST_HEAD(&substream->group->substreams);
1603 list_add_tail(&substream->link_list, &substream->group->substreams);
1604 substream->group->count = 1;
1605 }
1606 list_add_tail(&substream1->link_list, &substream->group->substreams);
1607 substream->group->count++;
1608 substream1->group = substream->group;
1609 _end:
1610 write_unlock_irq(&snd_pcm_link_rwlock);
1611 up_write(&snd_pcm_link_rwsem);
1612 fput(file);
1613 return res;
1614 }
1615
1616 static void relink_to_local(struct snd_pcm_substream *substream)
1617 {
1618 substream->group = &substream->self_group;
1619 INIT_LIST_HEAD(&substream->self_group.substreams);
1620 list_add_tail(&substream->link_list, &substream->self_group.substreams);
1621 }
1622
1623 static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1624 {
1625 struct snd_pcm_substream *s;
1626 int res = 0;
1627
1628 down_write(&snd_pcm_link_rwsem);
1629 write_lock_irq(&snd_pcm_link_rwlock);
1630 if (!snd_pcm_stream_linked(substream)) {
1631 res = -EALREADY;
1632 goto _end;
1633 }
1634 list_del(&substream->link_list);
1635 substream->group->count--;
1636 if (substream->group->count == 1) { /* detach the last stream, too */
1637 snd_pcm_group_for_each_entry(s, substream) {
1638 relink_to_local(s);
1639 break;
1640 }
1641 kfree(substream->group);
1642 }
1643 relink_to_local(substream);
1644 _end:
1645 write_unlock_irq(&snd_pcm_link_rwlock);
1646 up_write(&snd_pcm_link_rwsem);
1647 return res;
1648 }
1649
1650 /*
1651 * hw configurator
1652 */
1653 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1654 struct snd_pcm_hw_rule *rule)
1655 {
1656 struct snd_interval t;
1657 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1658 hw_param_interval_c(params, rule->deps[1]), &t);
1659 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1660 }
1661
1662 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1663 struct snd_pcm_hw_rule *rule)
1664 {
1665 struct snd_interval t;
1666 snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
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_muldivk(struct snd_pcm_hw_params *params,
1672 struct snd_pcm_hw_rule *rule)
1673 {
1674 struct snd_interval t;
1675 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1676 hw_param_interval_c(params, rule->deps[1]),
1677 (unsigned long) rule->private, &t);
1678 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1679 }
1680
1681 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1682 struct snd_pcm_hw_rule *rule)
1683 {
1684 struct snd_interval t;
1685 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1686 (unsigned long) rule->private,
1687 hw_param_interval_c(params, rule->deps[1]), &t);
1688 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1689 }
1690
1691 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1692 struct snd_pcm_hw_rule *rule)
1693 {
1694 unsigned int k;
1695 struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1696 struct snd_mask m;
1697 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1698 snd_mask_any(&m);
1699 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1700 int bits;
1701 if (! snd_mask_test(mask, k))
1702 continue;
1703 bits = snd_pcm_format_physical_width(k);
1704 if (bits <= 0)
1705 continue; /* ignore invalid formats */
1706 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1707 snd_mask_reset(&m, k);
1708 }
1709 return snd_mask_refine(mask, &m);
1710 }
1711
1712 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1713 struct snd_pcm_hw_rule *rule)
1714 {
1715 struct snd_interval t;
1716 unsigned int k;
1717 t.min = UINT_MAX;
1718 t.max = 0;
1719 t.openmin = 0;
1720 t.openmax = 0;
1721 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1722 int bits;
1723 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1724 continue;
1725 bits = snd_pcm_format_physical_width(k);
1726 if (bits <= 0)
1727 continue; /* ignore invalid formats */
1728 if (t.min > (unsigned)bits)
1729 t.min = bits;
1730 if (t.max < (unsigned)bits)
1731 t.max = bits;
1732 }
1733 t.integer = 1;
1734 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1735 }
1736
1737 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1738 #error "Change this table"
1739 #endif
1740
1741 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1742 48000, 64000, 88200, 96000, 176400, 192000 };
1743
1744 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1745 .count = ARRAY_SIZE(rates),
1746 .list = rates,
1747 };
1748
1749 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1750 struct snd_pcm_hw_rule *rule)
1751 {
1752 struct snd_pcm_hardware *hw = rule->private;
1753 return snd_interval_list(hw_param_interval(params, rule->var),
1754 snd_pcm_known_rates.count,
1755 snd_pcm_known_rates.list, hw->rates);
1756 }
1757
1758 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1759 struct snd_pcm_hw_rule *rule)
1760 {
1761 struct snd_interval t;
1762 struct snd_pcm_substream *substream = rule->private;
1763 t.min = 0;
1764 t.max = substream->buffer_bytes_max;
1765 t.openmin = 0;
1766 t.openmax = 0;
1767 t.integer = 1;
1768 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1769 }
1770
1771 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1772 {
1773 struct snd_pcm_runtime *runtime = substream->runtime;
1774 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1775 int k, err;
1776
1777 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1778 snd_mask_any(constrs_mask(constrs, k));
1779 }
1780
1781 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1782 snd_interval_any(constrs_interval(constrs, k));
1783 }
1784
1785 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1786 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1787 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1788 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1789 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1790
1791 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1792 snd_pcm_hw_rule_format, NULL,
1793 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1794 if (err < 0)
1795 return err;
1796 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1797 snd_pcm_hw_rule_sample_bits, NULL,
1798 SNDRV_PCM_HW_PARAM_FORMAT,
1799 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1800 if (err < 0)
1801 return err;
1802 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1803 snd_pcm_hw_rule_div, NULL,
1804 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1805 if (err < 0)
1806 return err;
1807 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1808 snd_pcm_hw_rule_mul, NULL,
1809 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1810 if (err < 0)
1811 return err;
1812 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1813 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1814 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1815 if (err < 0)
1816 return err;
1817 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1818 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1819 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1820 if (err < 0)
1821 return err;
1822 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1823 snd_pcm_hw_rule_div, NULL,
1824 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1825 if (err < 0)
1826 return err;
1827 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1828 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1829 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1830 if (err < 0)
1831 return err;
1832 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1833 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1834 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1835 if (err < 0)
1836 return err;
1837 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
1838 snd_pcm_hw_rule_div, NULL,
1839 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1840 if (err < 0)
1841 return err;
1842 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1843 snd_pcm_hw_rule_div, NULL,
1844 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1845 if (err < 0)
1846 return err;
1847 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1848 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1849 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1850 if (err < 0)
1851 return err;
1852 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1853 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1854 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1855 if (err < 0)
1856 return err;
1857 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1858 snd_pcm_hw_rule_mul, NULL,
1859 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1860 if (err < 0)
1861 return err;
1862 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1863 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1864 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1865 if (err < 0)
1866 return err;
1867 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1868 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1869 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1870 if (err < 0)
1871 return err;
1872 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1873 snd_pcm_hw_rule_muldivk, (void*) 8,
1874 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1875 if (err < 0)
1876 return err;
1877 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1878 snd_pcm_hw_rule_muldivk, (void*) 8,
1879 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1880 if (err < 0)
1881 return err;
1882 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1883 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1884 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1885 if (err < 0)
1886 return err;
1887 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
1888 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1889 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1890 if (err < 0)
1891 return err;
1892 return 0;
1893 }
1894
1895 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1896 {
1897 struct snd_pcm_runtime *runtime = substream->runtime;
1898 struct snd_pcm_hardware *hw = &runtime->hw;
1899 int err;
1900 unsigned int mask = 0;
1901
1902 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1903 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1904 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1905 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1906 if (hw->info & SNDRV_PCM_INFO_MMAP) {
1907 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1908 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1909 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1910 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1911 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1912 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1913 }
1914 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
1915 if (err < 0)
1916 return err;
1917
1918 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
1919 if (err < 0)
1920 return err;
1921
1922 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
1923 if (err < 0)
1924 return err;
1925
1926 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1927 hw->channels_min, hw->channels_max);
1928 if (err < 0)
1929 return err;
1930
1931 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1932 hw->rate_min, hw->rate_max);
1933 if (err < 0)
1934 return err;
1935
1936 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1937 hw->period_bytes_min, hw->period_bytes_max);
1938 if (err < 0)
1939 return err;
1940
1941 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1942 hw->periods_min, hw->periods_max);
1943 if (err < 0)
1944 return err;
1945
1946 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1947 hw->period_bytes_min, hw->buffer_bytes_max);
1948 if (err < 0)
1949 return err;
1950
1951 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1952 snd_pcm_hw_rule_buffer_bytes_max, substream,
1953 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1954 if (err < 0)
1955 return err;
1956
1957 /* FIXME: remove */
1958 if (runtime->dma_bytes) {
1959 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
1960 if (err < 0)
1961 return -EINVAL;
1962 }
1963
1964 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
1965 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1966 snd_pcm_hw_rule_rate, hw,
1967 SNDRV_PCM_HW_PARAM_RATE, -1);
1968 if (err < 0)
1969 return err;
1970 }
1971
1972 /* FIXME: this belong to lowlevel */
1973 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
1974
1975 return 0;
1976 }
1977
1978 static void pcm_release_private(struct snd_pcm_substream *substream)
1979 {
1980 snd_pcm_unlink(substream);
1981 }
1982
1983 void snd_pcm_release_substream(struct snd_pcm_substream *substream)
1984 {
1985 substream->ref_count--;
1986 if (substream->ref_count > 0)
1987 return;
1988
1989 snd_pcm_drop(substream);
1990 if (substream->hw_opened) {
1991 if (substream->ops->hw_free != NULL)
1992 substream->ops->hw_free(substream);
1993 substream->ops->close(substream);
1994 substream->hw_opened = 0;
1995 }
1996 if (pm_qos_request_active(&substream->latency_pm_qos_req))
1997 pm_qos_remove_request(&substream->latency_pm_qos_req);
1998 if (substream->pcm_release) {
1999 substream->pcm_release(substream);
2000 substream->pcm_release = NULL;
2001 }
2002 snd_pcm_detach_substream(substream);
2003 }
2004
2005 EXPORT_SYMBOL(snd_pcm_release_substream);
2006
2007 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2008 struct file *file,
2009 struct snd_pcm_substream **rsubstream)
2010 {
2011 struct snd_pcm_substream *substream;
2012 int err;
2013
2014 err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2015 if (err < 0)
2016 return err;
2017 if (substream->ref_count > 1) {
2018 *rsubstream = substream;
2019 return 0;
2020 }
2021
2022 err = snd_pcm_hw_constraints_init(substream);
2023 if (err < 0) {
2024 snd_printd("snd_pcm_hw_constraints_init failed\n");
2025 goto error;
2026 }
2027
2028 if ((err = substream->ops->open(substream)) < 0)
2029 goto error;
2030
2031 substream->hw_opened = 1;
2032
2033 err = snd_pcm_hw_constraints_complete(substream);
2034 if (err < 0) {
2035 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2036 goto error;
2037 }
2038
2039 *rsubstream = substream;
2040 return 0;
2041
2042 error:
2043 snd_pcm_release_substream(substream);
2044 return err;
2045 }
2046
2047 EXPORT_SYMBOL(snd_pcm_open_substream);
2048
2049 static int snd_pcm_open_file(struct file *file,
2050 struct snd_pcm *pcm,
2051 int stream,
2052 struct snd_pcm_file **rpcm_file)
2053 {
2054 struct snd_pcm_file *pcm_file;
2055 struct snd_pcm_substream *substream;
2056 struct snd_pcm_str *str;
2057 int err;
2058
2059 if (rpcm_file)
2060 *rpcm_file = NULL;
2061
2062 err = snd_pcm_open_substream(pcm, stream, file, &substream);
2063 if (err < 0)
2064 return err;
2065
2066 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2067 if (pcm_file == NULL) {
2068 snd_pcm_release_substream(substream);
2069 return -ENOMEM;
2070 }
2071 pcm_file->substream = substream;
2072 if (substream->ref_count == 1) {
2073 str = substream->pstr;
2074 substream->file = pcm_file;
2075 substream->pcm_release = pcm_release_private;
2076 }
2077 file->private_data = pcm_file;
2078 if (rpcm_file)
2079 *rpcm_file = pcm_file;
2080 return 0;
2081 }
2082
2083 static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2084 {
2085 struct snd_pcm *pcm;
2086 int err = nonseekable_open(inode, file);
2087 if (err < 0)
2088 return err;
2089 pcm = snd_lookup_minor_data(iminor(inode),
2090 SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2091 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2092 }
2093
2094 static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2095 {
2096 struct snd_pcm *pcm;
2097 int err = nonseekable_open(inode, file);
2098 if (err < 0)
2099 return err;
2100 pcm = snd_lookup_minor_data(iminor(inode),
2101 SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2102 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2103 }
2104
2105 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2106 {
2107 int err;
2108 struct snd_pcm_file *pcm_file;
2109 wait_queue_t wait;
2110
2111 if (pcm == NULL) {
2112 err = -ENODEV;
2113 goto __error1;
2114 }
2115 err = snd_card_file_add(pcm->card, file);
2116 if (err < 0)
2117 goto __error1;
2118 if (!try_module_get(pcm->card->module)) {
2119 err = -EFAULT;
2120 goto __error2;
2121 }
2122 init_waitqueue_entry(&wait, current);
2123 add_wait_queue(&pcm->open_wait, &wait);
2124 mutex_lock(&pcm->open_mutex);
2125 while (1) {
2126 err = snd_pcm_open_file(file, pcm, stream, &pcm_file);
2127 if (err >= 0)
2128 break;
2129 if (err == -EAGAIN) {
2130 if (file->f_flags & O_NONBLOCK) {
2131 err = -EBUSY;
2132 break;
2133 }
2134 } else
2135 break;
2136 set_current_state(TASK_INTERRUPTIBLE);
2137 mutex_unlock(&pcm->open_mutex);
2138 schedule();
2139 mutex_lock(&pcm->open_mutex);
2140 if (signal_pending(current)) {
2141 err = -ERESTARTSYS;
2142 break;
2143 }
2144 }
2145 remove_wait_queue(&pcm->open_wait, &wait);
2146 mutex_unlock(&pcm->open_mutex);
2147 if (err < 0)
2148 goto __error;
2149 return err;
2150
2151 __error:
2152 module_put(pcm->card->module);
2153 __error2:
2154 snd_card_file_remove(pcm->card, file);
2155 __error1:
2156 return err;
2157 }
2158
2159 static int snd_pcm_release(struct inode *inode, struct file *file)
2160 {
2161 struct snd_pcm *pcm;
2162 struct snd_pcm_substream *substream;
2163 struct snd_pcm_file *pcm_file;
2164
2165 pcm_file = file->private_data;
2166 substream = pcm_file->substream;
2167 if (snd_BUG_ON(!substream))
2168 return -ENXIO;
2169 pcm = substream->pcm;
2170 mutex_lock(&pcm->open_mutex);
2171 snd_pcm_release_substream(substream);
2172 kfree(pcm_file);
2173 mutex_unlock(&pcm->open_mutex);
2174 wake_up(&pcm->open_wait);
2175 module_put(pcm->card->module);
2176 snd_card_file_remove(pcm->card, file);
2177 return 0;
2178 }
2179
2180 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2181 snd_pcm_uframes_t frames)
2182 {
2183 struct snd_pcm_runtime *runtime = substream->runtime;
2184 snd_pcm_sframes_t appl_ptr;
2185 snd_pcm_sframes_t ret;
2186 snd_pcm_sframes_t hw_avail;
2187
2188 if (frames == 0)
2189 return 0;
2190
2191 snd_pcm_stream_lock_irq(substream);
2192 switch (runtime->status->state) {
2193 case SNDRV_PCM_STATE_PREPARED:
2194 break;
2195 case SNDRV_PCM_STATE_DRAINING:
2196 case SNDRV_PCM_STATE_RUNNING:
2197 if (snd_pcm_update_hw_ptr(substream) >= 0)
2198 break;
2199 /* Fall through */
2200 case SNDRV_PCM_STATE_XRUN:
2201 ret = -EPIPE;
2202 goto __end;
2203 case SNDRV_PCM_STATE_SUSPENDED:
2204 ret = -ESTRPIPE;
2205 goto __end;
2206 default:
2207 ret = -EBADFD;
2208 goto __end;
2209 }
2210
2211 hw_avail = snd_pcm_playback_hw_avail(runtime);
2212 if (hw_avail <= 0) {
2213 ret = 0;
2214 goto __end;
2215 }
2216 if (frames > (snd_pcm_uframes_t)hw_avail)
2217 frames = hw_avail;
2218 appl_ptr = runtime->control->appl_ptr - frames;
2219 if (appl_ptr < 0)
2220 appl_ptr += runtime->boundary;
2221 runtime->control->appl_ptr = appl_ptr;
2222 ret = frames;
2223 __end:
2224 snd_pcm_stream_unlock_irq(substream);
2225 return ret;
2226 }
2227
2228 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2229 snd_pcm_uframes_t frames)
2230 {
2231 struct snd_pcm_runtime *runtime = substream->runtime;
2232 snd_pcm_sframes_t appl_ptr;
2233 snd_pcm_sframes_t ret;
2234 snd_pcm_sframes_t hw_avail;
2235
2236 if (frames == 0)
2237 return 0;
2238
2239 snd_pcm_stream_lock_irq(substream);
2240 switch (runtime->status->state) {
2241 case SNDRV_PCM_STATE_PREPARED:
2242 case SNDRV_PCM_STATE_DRAINING:
2243 break;
2244 case SNDRV_PCM_STATE_RUNNING:
2245 if (snd_pcm_update_hw_ptr(substream) >= 0)
2246 break;
2247 /* Fall through */
2248 case SNDRV_PCM_STATE_XRUN:
2249 ret = -EPIPE;
2250 goto __end;
2251 case SNDRV_PCM_STATE_SUSPENDED:
2252 ret = -ESTRPIPE;
2253 goto __end;
2254 default:
2255 ret = -EBADFD;
2256 goto __end;
2257 }
2258
2259 hw_avail = snd_pcm_capture_hw_avail(runtime);
2260 if (hw_avail <= 0) {
2261 ret = 0;
2262 goto __end;
2263 }
2264 if (frames > (snd_pcm_uframes_t)hw_avail)
2265 frames = hw_avail;
2266 appl_ptr = runtime->control->appl_ptr - frames;
2267 if (appl_ptr < 0)
2268 appl_ptr += runtime->boundary;
2269 runtime->control->appl_ptr = appl_ptr;
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_playback_forward(struct snd_pcm_substream *substream,
2277 snd_pcm_uframes_t frames)
2278 {
2279 struct snd_pcm_runtime *runtime = substream->runtime;
2280 snd_pcm_sframes_t appl_ptr;
2281 snd_pcm_sframes_t ret;
2282 snd_pcm_sframes_t avail;
2283
2284 if (frames == 0)
2285 return 0;
2286
2287 snd_pcm_stream_lock_irq(substream);
2288 switch (runtime->status->state) {
2289 case SNDRV_PCM_STATE_PREPARED:
2290 case SNDRV_PCM_STATE_PAUSED:
2291 break;
2292 case SNDRV_PCM_STATE_DRAINING:
2293 case SNDRV_PCM_STATE_RUNNING:
2294 if (snd_pcm_update_hw_ptr(substream) >= 0)
2295 break;
2296 /* Fall through */
2297 case SNDRV_PCM_STATE_XRUN:
2298 ret = -EPIPE;
2299 goto __end;
2300 case SNDRV_PCM_STATE_SUSPENDED:
2301 ret = -ESTRPIPE;
2302 goto __end;
2303 default:
2304 ret = -EBADFD;
2305 goto __end;
2306 }
2307
2308 avail = snd_pcm_playback_avail(runtime);
2309 if (avail <= 0) {
2310 ret = 0;
2311 goto __end;
2312 }
2313 if (frames > (snd_pcm_uframes_t)avail)
2314 frames = avail;
2315 appl_ptr = runtime->control->appl_ptr + frames;
2316 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2317 appl_ptr -= runtime->boundary;
2318 runtime->control->appl_ptr = appl_ptr;
2319 ret = frames;
2320 __end:
2321 snd_pcm_stream_unlock_irq(substream);
2322 return ret;
2323 }
2324
2325 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2326 snd_pcm_uframes_t frames)
2327 {
2328 struct snd_pcm_runtime *runtime = substream->runtime;
2329 snd_pcm_sframes_t appl_ptr;
2330 snd_pcm_sframes_t ret;
2331 snd_pcm_sframes_t avail;
2332
2333 if (frames == 0)
2334 return 0;
2335
2336 snd_pcm_stream_lock_irq(substream);
2337 switch (runtime->status->state) {
2338 case SNDRV_PCM_STATE_PREPARED:
2339 case SNDRV_PCM_STATE_DRAINING:
2340 case SNDRV_PCM_STATE_PAUSED:
2341 break;
2342 case SNDRV_PCM_STATE_RUNNING:
2343 if (snd_pcm_update_hw_ptr(substream) >= 0)
2344 break;
2345 /* Fall through */
2346 case SNDRV_PCM_STATE_XRUN:
2347 ret = -EPIPE;
2348 goto __end;
2349 case SNDRV_PCM_STATE_SUSPENDED:
2350 ret = -ESTRPIPE;
2351 goto __end;
2352 default:
2353 ret = -EBADFD;
2354 goto __end;
2355 }
2356
2357 avail = snd_pcm_capture_avail(runtime);
2358 if (avail <= 0) {
2359 ret = 0;
2360 goto __end;
2361 }
2362 if (frames > (snd_pcm_uframes_t)avail)
2363 frames = avail;
2364 appl_ptr = runtime->control->appl_ptr + frames;
2365 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2366 appl_ptr -= runtime->boundary;
2367 runtime->control->appl_ptr = appl_ptr;
2368 ret = frames;
2369 __end:
2370 snd_pcm_stream_unlock_irq(substream);
2371 return ret;
2372 }
2373
2374 static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2375 {
2376 struct snd_pcm_runtime *runtime = substream->runtime;
2377 int err;
2378
2379 snd_pcm_stream_lock_irq(substream);
2380 switch (runtime->status->state) {
2381 case SNDRV_PCM_STATE_DRAINING:
2382 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2383 goto __badfd;
2384 case SNDRV_PCM_STATE_RUNNING:
2385 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2386 break;
2387 /* Fall through */
2388 case SNDRV_PCM_STATE_PREPARED:
2389 case SNDRV_PCM_STATE_SUSPENDED:
2390 err = 0;
2391 break;
2392 case SNDRV_PCM_STATE_XRUN:
2393 err = -EPIPE;
2394 break;
2395 default:
2396 __badfd:
2397 err = -EBADFD;
2398 break;
2399 }
2400 snd_pcm_stream_unlock_irq(substream);
2401 return err;
2402 }
2403
2404 static int snd_pcm_delay(struct snd_pcm_substream *substream,
2405 snd_pcm_sframes_t __user *res)
2406 {
2407 struct snd_pcm_runtime *runtime = substream->runtime;
2408 int err;
2409 snd_pcm_sframes_t n = 0;
2410
2411 snd_pcm_stream_lock_irq(substream);
2412 switch (runtime->status->state) {
2413 case SNDRV_PCM_STATE_DRAINING:
2414 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2415 goto __badfd;
2416 case SNDRV_PCM_STATE_RUNNING:
2417 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2418 break;
2419 /* Fall through */
2420 case SNDRV_PCM_STATE_PREPARED:
2421 case SNDRV_PCM_STATE_SUSPENDED:
2422 err = 0;
2423 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2424 n = snd_pcm_playback_hw_avail(runtime);
2425 else
2426 n = snd_pcm_capture_avail(runtime);
2427 n += runtime->delay;
2428 break;
2429 case SNDRV_PCM_STATE_XRUN:
2430 err = -EPIPE;
2431 break;
2432 default:
2433 __badfd:
2434 err = -EBADFD;
2435 break;
2436 }
2437 snd_pcm_stream_unlock_irq(substream);
2438 if (!err)
2439 if (put_user(n, res))
2440 err = -EFAULT;
2441 return err;
2442 }
2443
2444 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2445 struct snd_pcm_sync_ptr __user *_sync_ptr)
2446 {
2447 struct snd_pcm_runtime *runtime = substream->runtime;
2448 struct snd_pcm_sync_ptr sync_ptr;
2449 volatile struct snd_pcm_mmap_status *status;
2450 volatile struct snd_pcm_mmap_control *control;
2451 int err;
2452
2453 memset(&sync_ptr, 0, sizeof(sync_ptr));
2454 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2455 return -EFAULT;
2456 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2457 return -EFAULT;
2458 status = runtime->status;
2459 control = runtime->control;
2460 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2461 err = snd_pcm_hwsync(substream);
2462 if (err < 0)
2463 return err;
2464 }
2465 snd_pcm_stream_lock_irq(substream);
2466 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2467 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2468 else
2469 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2470 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2471 control->avail_min = sync_ptr.c.control.avail_min;
2472 else
2473 sync_ptr.c.control.avail_min = control->avail_min;
2474 sync_ptr.s.status.state = status->state;
2475 sync_ptr.s.status.hw_ptr = status->hw_ptr;
2476 sync_ptr.s.status.tstamp = status->tstamp;
2477 sync_ptr.s.status.suspended_state = status->suspended_state;
2478 snd_pcm_stream_unlock_irq(substream);
2479 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2480 return -EFAULT;
2481 return 0;
2482 }
2483
2484 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2485 {
2486 struct snd_pcm_runtime *runtime = substream->runtime;
2487 int arg;
2488
2489 if (get_user(arg, _arg))
2490 return -EFAULT;
2491 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2492 return -EINVAL;
2493 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY;
2494 if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
2495 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC;
2496 return 0;
2497 }
2498
2499 static int snd_pcm_common_ioctl1(struct file *file,
2500 struct snd_pcm_substream *substream,
2501 unsigned int cmd, void __user *arg)
2502 {
2503 switch (cmd) {
2504 case SNDRV_PCM_IOCTL_PVERSION:
2505 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2506 case SNDRV_PCM_IOCTL_INFO:
2507 return snd_pcm_info_user(substream, arg);
2508 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
2509 return 0;
2510 case SNDRV_PCM_IOCTL_TTSTAMP:
2511 return snd_pcm_tstamp(substream, arg);
2512 case SNDRV_PCM_IOCTL_HW_REFINE:
2513 return snd_pcm_hw_refine_user(substream, arg);
2514 case SNDRV_PCM_IOCTL_HW_PARAMS:
2515 return snd_pcm_hw_params_user(substream, arg);
2516 case SNDRV_PCM_IOCTL_HW_FREE:
2517 return snd_pcm_hw_free(substream);
2518 case SNDRV_PCM_IOCTL_SW_PARAMS:
2519 return snd_pcm_sw_params_user(substream, arg);
2520 case SNDRV_PCM_IOCTL_STATUS:
2521 return snd_pcm_status_user(substream, arg);
2522 case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2523 return snd_pcm_channel_info_user(substream, arg);
2524 case SNDRV_PCM_IOCTL_PREPARE:
2525 return snd_pcm_prepare(substream, file);
2526 case SNDRV_PCM_IOCTL_RESET:
2527 return snd_pcm_reset(substream);
2528 case SNDRV_PCM_IOCTL_START:
2529 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2530 case SNDRV_PCM_IOCTL_LINK:
2531 return snd_pcm_link(substream, (int)(unsigned long) arg);
2532 case SNDRV_PCM_IOCTL_UNLINK:
2533 return snd_pcm_unlink(substream);
2534 case SNDRV_PCM_IOCTL_RESUME:
2535 return snd_pcm_resume(substream);
2536 case SNDRV_PCM_IOCTL_XRUN:
2537 return snd_pcm_xrun(substream);
2538 case SNDRV_PCM_IOCTL_HWSYNC:
2539 return snd_pcm_hwsync(substream);
2540 case SNDRV_PCM_IOCTL_DELAY:
2541 return snd_pcm_delay(substream, arg);
2542 case SNDRV_PCM_IOCTL_SYNC_PTR:
2543 return snd_pcm_sync_ptr(substream, arg);
2544 #ifdef CONFIG_SND_SUPPORT_OLD_API
2545 case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2546 return snd_pcm_hw_refine_old_user(substream, arg);
2547 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2548 return snd_pcm_hw_params_old_user(substream, arg);
2549 #endif
2550 case SNDRV_PCM_IOCTL_DRAIN:
2551 return snd_pcm_drain(substream, file);
2552 case SNDRV_PCM_IOCTL_DROP:
2553 return snd_pcm_drop(substream);
2554 case SNDRV_PCM_IOCTL_PAUSE:
2555 {
2556 int res;
2557 snd_pcm_stream_lock_irq(substream);
2558 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2559 snd_pcm_stream_unlock_irq(substream);
2560 return res;
2561 }
2562 }
2563 snd_printd("unknown ioctl = 0x%x\n", cmd);
2564 return -ENOTTY;
2565 }
2566
2567 static int snd_pcm_playback_ioctl1(struct file *file,
2568 struct snd_pcm_substream *substream,
2569 unsigned int cmd, void __user *arg)
2570 {
2571 if (snd_BUG_ON(!substream))
2572 return -ENXIO;
2573 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2574 return -EINVAL;
2575 switch (cmd) {
2576 case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2577 {
2578 struct snd_xferi xferi;
2579 struct snd_xferi __user *_xferi = arg;
2580 struct snd_pcm_runtime *runtime = substream->runtime;
2581 snd_pcm_sframes_t result;
2582 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2583 return -EBADFD;
2584 if (put_user(0, &_xferi->result))
2585 return -EFAULT;
2586 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2587 return -EFAULT;
2588 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2589 __put_user(result, &_xferi->result);
2590 return result < 0 ? result : 0;
2591 }
2592 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2593 {
2594 struct snd_xfern xfern;
2595 struct snd_xfern __user *_xfern = arg;
2596 struct snd_pcm_runtime *runtime = substream->runtime;
2597 void __user **bufs;
2598 snd_pcm_sframes_t result;
2599 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2600 return -EBADFD;
2601 if (runtime->channels > 128)
2602 return -EINVAL;
2603 if (put_user(0, &_xfern->result))
2604 return -EFAULT;
2605 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2606 return -EFAULT;
2607
2608 bufs = memdup_user(xfern.bufs,
2609 sizeof(void *) * runtime->channels);
2610 if (IS_ERR(bufs))
2611 return PTR_ERR(bufs);
2612 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2613 kfree(bufs);
2614 __put_user(result, &_xfern->result);
2615 return result < 0 ? result : 0;
2616 }
2617 case SNDRV_PCM_IOCTL_REWIND:
2618 {
2619 snd_pcm_uframes_t frames;
2620 snd_pcm_uframes_t __user *_frames = arg;
2621 snd_pcm_sframes_t result;
2622 if (get_user(frames, _frames))
2623 return -EFAULT;
2624 if (put_user(0, _frames))
2625 return -EFAULT;
2626 result = snd_pcm_playback_rewind(substream, frames);
2627 __put_user(result, _frames);
2628 return result < 0 ? result : 0;
2629 }
2630 case SNDRV_PCM_IOCTL_FORWARD:
2631 {
2632 snd_pcm_uframes_t frames;
2633 snd_pcm_uframes_t __user *_frames = arg;
2634 snd_pcm_sframes_t result;
2635 if (get_user(frames, _frames))
2636 return -EFAULT;
2637 if (put_user(0, _frames))
2638 return -EFAULT;
2639 result = snd_pcm_playback_forward(substream, frames);
2640 __put_user(result, _frames);
2641 return result < 0 ? result : 0;
2642 }
2643 }
2644 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2645 }
2646
2647 static int snd_pcm_capture_ioctl1(struct file *file,
2648 struct snd_pcm_substream *substream,
2649 unsigned int cmd, void __user *arg)
2650 {
2651 if (snd_BUG_ON(!substream))
2652 return -ENXIO;
2653 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2654 return -EINVAL;
2655 switch (cmd) {
2656 case SNDRV_PCM_IOCTL_READI_FRAMES:
2657 {
2658 struct snd_xferi xferi;
2659 struct snd_xferi __user *_xferi = arg;
2660 struct snd_pcm_runtime *runtime = substream->runtime;
2661 snd_pcm_sframes_t result;
2662 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2663 return -EBADFD;
2664 if (put_user(0, &_xferi->result))
2665 return -EFAULT;
2666 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2667 return -EFAULT;
2668 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2669 __put_user(result, &_xferi->result);
2670 return result < 0 ? result : 0;
2671 }
2672 case SNDRV_PCM_IOCTL_READN_FRAMES:
2673 {
2674 struct snd_xfern xfern;
2675 struct snd_xfern __user *_xfern = arg;
2676 struct snd_pcm_runtime *runtime = substream->runtime;
2677 void *bufs;
2678 snd_pcm_sframes_t result;
2679 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2680 return -EBADFD;
2681 if (runtime->channels > 128)
2682 return -EINVAL;
2683 if (put_user(0, &_xfern->result))
2684 return -EFAULT;
2685 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2686 return -EFAULT;
2687
2688 bufs = memdup_user(xfern.bufs,
2689 sizeof(void *) * runtime->channels);
2690 if (IS_ERR(bufs))
2691 return PTR_ERR(bufs);
2692 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2693 kfree(bufs);
2694 __put_user(result, &_xfern->result);
2695 return result < 0 ? result : 0;
2696 }
2697 case SNDRV_PCM_IOCTL_REWIND:
2698 {
2699 snd_pcm_uframes_t frames;
2700 snd_pcm_uframes_t __user *_frames = arg;
2701 snd_pcm_sframes_t result;
2702 if (get_user(frames, _frames))
2703 return -EFAULT;
2704 if (put_user(0, _frames))
2705 return -EFAULT;
2706 result = snd_pcm_capture_rewind(substream, frames);
2707 __put_user(result, _frames);
2708 return result < 0 ? result : 0;
2709 }
2710 case SNDRV_PCM_IOCTL_FORWARD:
2711 {
2712 snd_pcm_uframes_t frames;
2713 snd_pcm_uframes_t __user *_frames = arg;
2714 snd_pcm_sframes_t result;
2715 if (get_user(frames, _frames))
2716 return -EFAULT;
2717 if (put_user(0, _frames))
2718 return -EFAULT;
2719 result = snd_pcm_capture_forward(substream, frames);
2720 __put_user(result, _frames);
2721 return result < 0 ? result : 0;
2722 }
2723 }
2724 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2725 }
2726
2727 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2728 unsigned long arg)
2729 {
2730 struct snd_pcm_file *pcm_file;
2731
2732 pcm_file = file->private_data;
2733
2734 if (((cmd >> 8) & 0xff) != 'A')
2735 return -ENOTTY;
2736
2737 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2738 (void __user *)arg);
2739 }
2740
2741 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2742 unsigned long arg)
2743 {
2744 struct snd_pcm_file *pcm_file;
2745
2746 pcm_file = file->private_data;
2747
2748 if (((cmd >> 8) & 0xff) != 'A')
2749 return -ENOTTY;
2750
2751 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2752 (void __user *)arg);
2753 }
2754
2755 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2756 unsigned int cmd, void *arg)
2757 {
2758 mm_segment_t fs;
2759 int result;
2760
2761 fs = snd_enter_user();
2762 switch (substream->stream) {
2763 case SNDRV_PCM_STREAM_PLAYBACK:
2764 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2765 (void __user *)arg);
2766 break;
2767 case SNDRV_PCM_STREAM_CAPTURE:
2768 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2769 (void __user *)arg);
2770 break;
2771 default:
2772 result = -EINVAL;
2773 break;
2774 }
2775 snd_leave_user(fs);
2776 return result;
2777 }
2778
2779 EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2780
2781 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2782 loff_t * offset)
2783 {
2784 struct snd_pcm_file *pcm_file;
2785 struct snd_pcm_substream *substream;
2786 struct snd_pcm_runtime *runtime;
2787 snd_pcm_sframes_t result;
2788
2789 pcm_file = file->private_data;
2790 substream = pcm_file->substream;
2791 if (PCM_RUNTIME_CHECK(substream))
2792 return -ENXIO;
2793 runtime = substream->runtime;
2794 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2795 return -EBADFD;
2796 if (!frame_aligned(runtime, count))
2797 return -EINVAL;
2798 count = bytes_to_frames(runtime, count);
2799 result = snd_pcm_lib_read(substream, buf, count);
2800 if (result > 0)
2801 result = frames_to_bytes(runtime, result);
2802 return result;
2803 }
2804
2805 static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2806 size_t count, loff_t * offset)
2807 {
2808 struct snd_pcm_file *pcm_file;
2809 struct snd_pcm_substream *substream;
2810 struct snd_pcm_runtime *runtime;
2811 snd_pcm_sframes_t result;
2812
2813 pcm_file = file->private_data;
2814 substream = pcm_file->substream;
2815 if (PCM_RUNTIME_CHECK(substream))
2816 return -ENXIO;
2817 runtime = substream->runtime;
2818 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2819 return -EBADFD;
2820 if (!frame_aligned(runtime, count))
2821 return -EINVAL;
2822 count = bytes_to_frames(runtime, count);
2823 result = snd_pcm_lib_write(substream, buf, count);
2824 if (result > 0)
2825 result = frames_to_bytes(runtime, result);
2826 return result;
2827 }
2828
2829 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
2830 unsigned long nr_segs, loff_t pos)
2831
2832 {
2833 struct snd_pcm_file *pcm_file;
2834 struct snd_pcm_substream *substream;
2835 struct snd_pcm_runtime *runtime;
2836 snd_pcm_sframes_t result;
2837 unsigned long i;
2838 void __user **bufs;
2839 snd_pcm_uframes_t frames;
2840
2841 pcm_file = iocb->ki_filp->private_data;
2842 substream = pcm_file->substream;
2843 if (PCM_RUNTIME_CHECK(substream))
2844 return -ENXIO;
2845 runtime = substream->runtime;
2846 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2847 return -EBADFD;
2848 if (nr_segs > 1024 || nr_segs != runtime->channels)
2849 return -EINVAL;
2850 if (!frame_aligned(runtime, iov->iov_len))
2851 return -EINVAL;
2852 frames = bytes_to_samples(runtime, iov->iov_len);
2853 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2854 if (bufs == NULL)
2855 return -ENOMEM;
2856 for (i = 0; i < nr_segs; ++i)
2857 bufs[i] = iov[i].iov_base;
2858 result = snd_pcm_lib_readv(substream, bufs, frames);
2859 if (result > 0)
2860 result = frames_to_bytes(runtime, result);
2861 kfree(bufs);
2862 return result;
2863 }
2864
2865 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
2866 unsigned long nr_segs, loff_t pos)
2867 {
2868 struct snd_pcm_file *pcm_file;
2869 struct snd_pcm_substream *substream;
2870 struct snd_pcm_runtime *runtime;
2871 snd_pcm_sframes_t result;
2872 unsigned long i;
2873 void __user **bufs;
2874 snd_pcm_uframes_t frames;
2875
2876 pcm_file = iocb->ki_filp->private_data;
2877 substream = pcm_file->substream;
2878 if (PCM_RUNTIME_CHECK(substream))
2879 return -ENXIO;
2880 runtime = substream->runtime;
2881 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2882 return -EBADFD;
2883 if (nr_segs > 128 || nr_segs != runtime->channels ||
2884 !frame_aligned(runtime, iov->iov_len))
2885 return -EINVAL;
2886 frames = bytes_to_samples(runtime, iov->iov_len);
2887 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2888 if (bufs == NULL)
2889 return -ENOMEM;
2890 for (i = 0; i < nr_segs; ++i)
2891 bufs[i] = iov[i].iov_base;
2892 result = snd_pcm_lib_writev(substream, bufs, frames);
2893 if (result > 0)
2894 result = frames_to_bytes(runtime, result);
2895 kfree(bufs);
2896 return result;
2897 }
2898
2899 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2900 {
2901 struct snd_pcm_file *pcm_file;
2902 struct snd_pcm_substream *substream;
2903 struct snd_pcm_runtime *runtime;
2904 unsigned int mask;
2905 snd_pcm_uframes_t avail;
2906
2907 pcm_file = file->private_data;
2908
2909 substream = pcm_file->substream;
2910 if (PCM_RUNTIME_CHECK(substream))
2911 return -ENXIO;
2912 runtime = substream->runtime;
2913
2914 poll_wait(file, &runtime->sleep, wait);
2915
2916 snd_pcm_stream_lock_irq(substream);
2917 avail = snd_pcm_playback_avail(runtime);
2918 switch (runtime->status->state) {
2919 case SNDRV_PCM_STATE_RUNNING:
2920 case SNDRV_PCM_STATE_PREPARED:
2921 case SNDRV_PCM_STATE_PAUSED:
2922 if (avail >= runtime->control->avail_min) {
2923 mask = POLLOUT | POLLWRNORM;
2924 break;
2925 }
2926 /* Fall through */
2927 case SNDRV_PCM_STATE_DRAINING:
2928 mask = 0;
2929 break;
2930 default:
2931 mask = POLLOUT | POLLWRNORM | POLLERR;
2932 break;
2933 }
2934 snd_pcm_stream_unlock_irq(substream);
2935 return mask;
2936 }
2937
2938 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2939 {
2940 struct snd_pcm_file *pcm_file;
2941 struct snd_pcm_substream *substream;
2942 struct snd_pcm_runtime *runtime;
2943 unsigned int mask;
2944 snd_pcm_uframes_t avail;
2945
2946 pcm_file = file->private_data;
2947
2948 substream = pcm_file->substream;
2949 if (PCM_RUNTIME_CHECK(substream))
2950 return -ENXIO;
2951 runtime = substream->runtime;
2952
2953 poll_wait(file, &runtime->sleep, wait);
2954
2955 snd_pcm_stream_lock_irq(substream);
2956 avail = snd_pcm_capture_avail(runtime);
2957 switch (runtime->status->state) {
2958 case SNDRV_PCM_STATE_RUNNING:
2959 case SNDRV_PCM_STATE_PREPARED:
2960 case SNDRV_PCM_STATE_PAUSED:
2961 if (avail >= runtime->control->avail_min) {
2962 mask = POLLIN | POLLRDNORM;
2963 break;
2964 }
2965 mask = 0;
2966 break;
2967 case SNDRV_PCM_STATE_DRAINING:
2968 if (avail > 0) {
2969 mask = POLLIN | POLLRDNORM;
2970 break;
2971 }
2972 /* Fall through */
2973 default:
2974 mask = POLLIN | POLLRDNORM | POLLERR;
2975 break;
2976 }
2977 snd_pcm_stream_unlock_irq(substream);
2978 return mask;
2979 }
2980
2981 /*
2982 * mmap support
2983 */
2984
2985 /*
2986 * Only on coherent architectures, we can mmap the status and the control records
2987 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
2988 */
2989 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
2990 /*
2991 * mmap status record
2992 */
2993 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
2994 struct vm_fault *vmf)
2995 {
2996 struct snd_pcm_substream *substream = area->vm_private_data;
2997 struct snd_pcm_runtime *runtime;
2998
2999 if (substream == NULL)
3000 return VM_FAULT_SIGBUS;
3001 runtime = substream->runtime;
3002 vmf->page = virt_to_page(runtime->status);
3003 get_page(vmf->page);
3004 return 0;
3005 }
3006
3007 static const struct vm_operations_struct snd_pcm_vm_ops_status =
3008 {
3009 .fault = snd_pcm_mmap_status_fault,
3010 };
3011
3012 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3013 struct vm_area_struct *area)
3014 {
3015 struct snd_pcm_runtime *runtime;
3016 long size;
3017 if (!(area->vm_flags & VM_READ))
3018 return -EINVAL;
3019 runtime = substream->runtime;
3020 size = area->vm_end - area->vm_start;
3021 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3022 return -EINVAL;
3023 area->vm_ops = &snd_pcm_vm_ops_status;
3024 area->vm_private_data = substream;
3025 area->vm_flags |= VM_RESERVED;
3026 return 0;
3027 }
3028
3029 /*
3030 * mmap control record
3031 */
3032 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3033 struct vm_fault *vmf)
3034 {
3035 struct snd_pcm_substream *substream = area->vm_private_data;
3036 struct snd_pcm_runtime *runtime;
3037
3038 if (substream == NULL)
3039 return VM_FAULT_SIGBUS;
3040 runtime = substream->runtime;
3041 vmf->page = virt_to_page(runtime->control);
3042 get_page(vmf->page);
3043 return 0;
3044 }
3045
3046 static const struct vm_operations_struct snd_pcm_vm_ops_control =
3047 {
3048 .fault = snd_pcm_mmap_control_fault,
3049 };
3050
3051 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3052 struct vm_area_struct *area)
3053 {
3054 struct snd_pcm_runtime *runtime;
3055 long size;
3056 if (!(area->vm_flags & VM_READ))
3057 return -EINVAL;
3058 runtime = substream->runtime;
3059 size = area->vm_end - area->vm_start;
3060 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3061 return -EINVAL;
3062 area->vm_ops = &snd_pcm_vm_ops_control;
3063 area->vm_private_data = substream;
3064 area->vm_flags |= VM_RESERVED;
3065 return 0;
3066 }
3067 #else /* ! coherent mmap */
3068 /*
3069 * don't support mmap for status and control records.
3070 */
3071 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3072 struct vm_area_struct *area)
3073 {
3074 return -ENXIO;
3075 }
3076 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3077 struct vm_area_struct *area)
3078 {
3079 return -ENXIO;
3080 }
3081 #endif /* coherent mmap */
3082
3083 static inline struct page *
3084 snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3085 {
3086 void *vaddr = substream->runtime->dma_area + ofs;
3087 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3088 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3089 return virt_to_page(CAC_ADDR(vaddr));
3090 #endif
3091 #if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE)
3092 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) {
3093 dma_addr_t addr = substream->runtime->dma_addr + ofs;
3094 addr -= get_dma_offset(substream->dma_buffer.dev.dev);
3095 /* assume dma_handle set via pfn_to_phys() in
3096 * mm/dma-noncoherent.c
3097 */
3098 return pfn_to_page(addr >> PAGE_SHIFT);
3099 }
3100 #endif
3101 return virt_to_page(vaddr);
3102 }
3103
3104 /*
3105 * fault callback for mmapping a RAM page
3106 */
3107 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3108 struct vm_fault *vmf)
3109 {
3110 struct snd_pcm_substream *substream = area->vm_private_data;
3111 struct snd_pcm_runtime *runtime;
3112 unsigned long offset;
3113 struct page * page;
3114 size_t dma_bytes;
3115
3116 if (substream == NULL)
3117 return VM_FAULT_SIGBUS;
3118 runtime = substream->runtime;
3119 offset = vmf->pgoff << PAGE_SHIFT;
3120 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3121 if (offset > dma_bytes - PAGE_SIZE)
3122 return VM_FAULT_SIGBUS;
3123 if (substream->ops->page)
3124 page = substream->ops->page(substream, offset);
3125 else
3126 page = snd_pcm_default_page_ops(substream, offset);
3127 if (!page)
3128 return VM_FAULT_SIGBUS;
3129 get_page(page);
3130 vmf->page = page;
3131 return 0;
3132 }
3133
3134 static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3135 .open = snd_pcm_mmap_data_open,
3136 .close = snd_pcm_mmap_data_close,
3137 };
3138
3139 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
3140 .open = snd_pcm_mmap_data_open,
3141 .close = snd_pcm_mmap_data_close,
3142 .fault = snd_pcm_mmap_data_fault,
3143 };
3144
3145 #ifndef ARCH_HAS_DMA_MMAP_COHERENT
3146 /* This should be defined / handled globally! */
3147 #ifdef CONFIG_ARM
3148 #define ARCH_HAS_DMA_MMAP_COHERENT
3149 #endif
3150 #endif
3151
3152 /*
3153 * mmap the DMA buffer on RAM
3154 */
3155 static int snd_pcm_default_mmap(struct snd_pcm_substream *substream,
3156 struct vm_area_struct *area)
3157 {
3158 area->vm_flags |= VM_RESERVED;
3159 #ifdef ARCH_HAS_DMA_MMAP_COHERENT
3160 if (!substream->ops->page &&
3161 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3162 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3163 area,
3164 substream->runtime->dma_area,
3165 substream->runtime->dma_addr,
3166 area->vm_end - area->vm_start);
3167 #elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3168 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV &&
3169 !plat_device_is_coherent(substream->dma_buffer.dev.dev))
3170 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3171 #endif /* ARCH_HAS_DMA_MMAP_COHERENT */
3172 /* mmap with fault handler */
3173 area->vm_ops = &snd_pcm_vm_ops_data_fault;
3174 return 0;
3175 }
3176
3177 /*
3178 * mmap the DMA buffer on I/O memory area
3179 */
3180 #if SNDRV_PCM_INFO_MMAP_IOMEM
3181 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3182 struct vm_area_struct *area)
3183 {
3184 long size;
3185 unsigned long offset;
3186
3187 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3188 area->vm_flags |= VM_IO;
3189 size = area->vm_end - area->vm_start;
3190 offset = area->vm_pgoff << PAGE_SHIFT;
3191 if (io_remap_pfn_range(area, area->vm_start,
3192 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3193 size, area->vm_page_prot))
3194 return -EAGAIN;
3195 return 0;
3196 }
3197
3198 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3199 #endif /* SNDRV_PCM_INFO_MMAP */
3200
3201 /* mmap callback with pgprot_noncached */
3202 int snd_pcm_lib_mmap_noncached(struct snd_pcm_substream *substream,
3203 struct vm_area_struct *area)
3204 {
3205 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3206 return snd_pcm_default_mmap(substream, area);
3207 }
3208 EXPORT_SYMBOL(snd_pcm_lib_mmap_noncached);
3209
3210 /*
3211 * mmap DMA buffer
3212 */
3213 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3214 struct vm_area_struct *area)
3215 {
3216 struct snd_pcm_runtime *runtime;
3217 long size;
3218 unsigned long offset;
3219 size_t dma_bytes;
3220 int err;
3221
3222 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3223 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3224 return -EINVAL;
3225 } else {
3226 if (!(area->vm_flags & VM_READ))
3227 return -EINVAL;
3228 }
3229 runtime = substream->runtime;
3230 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3231 return -EBADFD;
3232 if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3233 return -ENXIO;
3234 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3235 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3236 return -EINVAL;
3237 size = area->vm_end - area->vm_start;
3238 offset = area->vm_pgoff << PAGE_SHIFT;
3239 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3240 if ((size_t)size > dma_bytes)
3241 return -EINVAL;
3242 if (offset > dma_bytes - size)
3243 return -EINVAL;
3244
3245 area->vm_ops = &snd_pcm_vm_ops_data;
3246 area->vm_private_data = substream;
3247 if (substream->ops->mmap)
3248 err = substream->ops->mmap(substream, area);
3249 else
3250 err = snd_pcm_default_mmap(substream, area);
3251 if (!err)
3252 atomic_inc(&substream->mmap_count);
3253 return err;
3254 }
3255
3256 EXPORT_SYMBOL(snd_pcm_mmap_data);
3257
3258 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3259 {
3260 struct snd_pcm_file * pcm_file;
3261 struct snd_pcm_substream *substream;
3262 unsigned long offset;
3263
3264 pcm_file = file->private_data;
3265 substream = pcm_file->substream;
3266 if (PCM_RUNTIME_CHECK(substream))
3267 return -ENXIO;
3268
3269 offset = area->vm_pgoff << PAGE_SHIFT;
3270 switch (offset) {
3271 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3272 if (pcm_file->no_compat_mmap)
3273 return -ENXIO;
3274 return snd_pcm_mmap_status(substream, file, area);
3275 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3276 if (pcm_file->no_compat_mmap)
3277 return -ENXIO;
3278 return snd_pcm_mmap_control(substream, file, area);
3279 default:
3280 return snd_pcm_mmap_data(substream, file, area);
3281 }
3282 return 0;
3283 }
3284
3285 static int snd_pcm_fasync(int fd, struct file * file, int on)
3286 {
3287 struct snd_pcm_file * pcm_file;
3288 struct snd_pcm_substream *substream;
3289 struct snd_pcm_runtime *runtime;
3290
3291 pcm_file = file->private_data;
3292 substream = pcm_file->substream;
3293 if (PCM_RUNTIME_CHECK(substream))
3294 return -ENXIO;
3295 runtime = substream->runtime;
3296 return fasync_helper(fd, file, on, &runtime->fasync);
3297 }
3298
3299 /*
3300 * ioctl32 compat
3301 */
3302 #ifdef CONFIG_COMPAT
3303 #include "pcm_compat.c"
3304 #else
3305 #define snd_pcm_ioctl_compat NULL
3306 #endif
3307
3308 /*
3309 * To be removed helpers to keep binary compatibility
3310 */
3311
3312 #ifdef CONFIG_SND_SUPPORT_OLD_API
3313 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3314 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3315
3316 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3317 struct snd_pcm_hw_params_old *oparams)
3318 {
3319 unsigned int i;
3320
3321 memset(params, 0, sizeof(*params));
3322 params->flags = oparams->flags;
3323 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3324 params->masks[i].bits[0] = oparams->masks[i];
3325 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3326 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3327 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3328 params->info = oparams->info;
3329 params->msbits = oparams->msbits;
3330 params->rate_num = oparams->rate_num;
3331 params->rate_den = oparams->rate_den;
3332 params->fifo_size = oparams->fifo_size;
3333 }
3334
3335 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3336 struct snd_pcm_hw_params *params)
3337 {
3338 unsigned int i;
3339
3340 memset(oparams, 0, sizeof(*oparams));
3341 oparams->flags = params->flags;
3342 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3343 oparams->masks[i] = params->masks[i].bits[0];
3344 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3345 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3346 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3347 oparams->info = params->info;
3348 oparams->msbits = params->msbits;
3349 oparams->rate_num = params->rate_num;
3350 oparams->rate_den = params->rate_den;
3351 oparams->fifo_size = params->fifo_size;
3352 }
3353
3354 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3355 struct snd_pcm_hw_params_old __user * _oparams)
3356 {
3357 struct snd_pcm_hw_params *params;
3358 struct snd_pcm_hw_params_old *oparams = NULL;
3359 int err;
3360
3361 params = kmalloc(sizeof(*params), GFP_KERNEL);
3362 if (!params)
3363 return -ENOMEM;
3364
3365 oparams = memdup_user(_oparams, sizeof(*oparams));
3366 if (IS_ERR(oparams)) {
3367 err = PTR_ERR(oparams);
3368 goto out;
3369 }
3370 snd_pcm_hw_convert_from_old_params(params, oparams);
3371 err = snd_pcm_hw_refine(substream, params);
3372 snd_pcm_hw_convert_to_old_params(oparams, params);
3373 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3374 if (!err)
3375 err = -EFAULT;
3376 }
3377
3378 kfree(oparams);
3379 out:
3380 kfree(params);
3381 return err;
3382 }
3383
3384 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3385 struct snd_pcm_hw_params_old __user * _oparams)
3386 {
3387 struct snd_pcm_hw_params *params;
3388 struct snd_pcm_hw_params_old *oparams = NULL;
3389 int err;
3390
3391 params = kmalloc(sizeof(*params), GFP_KERNEL);
3392 if (!params)
3393 return -ENOMEM;
3394
3395 oparams = memdup_user(_oparams, sizeof(*oparams));
3396 if (IS_ERR(oparams)) {
3397 err = PTR_ERR(oparams);
3398 goto out;
3399 }
3400 snd_pcm_hw_convert_from_old_params(params, oparams);
3401 err = snd_pcm_hw_params(substream, params);
3402 snd_pcm_hw_convert_to_old_params(oparams, params);
3403 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3404 if (!err)
3405 err = -EFAULT;
3406 }
3407
3408 kfree(oparams);
3409 out:
3410 kfree(params);
3411 return err;
3412 }
3413 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3414
3415 #ifndef CONFIG_MMU
3416 static unsigned long snd_pcm_get_unmapped_area(struct file *file,
3417 unsigned long addr,
3418 unsigned long len,
3419 unsigned long pgoff,
3420 unsigned long flags)
3421 {
3422 struct snd_pcm_file *pcm_file = file->private_data;
3423 struct snd_pcm_substream *substream = pcm_file->substream;
3424 struct snd_pcm_runtime *runtime = substream->runtime;
3425 unsigned long offset = pgoff << PAGE_SHIFT;
3426
3427 switch (offset) {
3428 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3429 return (unsigned long)runtime->status;
3430 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3431 return (unsigned long)runtime->control;
3432 default:
3433 return (unsigned long)runtime->dma_area + offset;
3434 }
3435 }
3436 #else
3437 # define snd_pcm_get_unmapped_area NULL
3438 #endif
3439
3440 /*
3441 * Register section
3442 */
3443
3444 const struct file_operations snd_pcm_f_ops[2] = {
3445 {
3446 .owner = THIS_MODULE,
3447 .write = snd_pcm_write,
3448 .aio_write = snd_pcm_aio_write,
3449 .open = snd_pcm_playback_open,
3450 .release = snd_pcm_release,
3451 .llseek = no_llseek,
3452 .poll = snd_pcm_playback_poll,
3453 .unlocked_ioctl = snd_pcm_playback_ioctl,
3454 .compat_ioctl = snd_pcm_ioctl_compat,
3455 .mmap = snd_pcm_mmap,
3456 .fasync = snd_pcm_fasync,
3457 .get_unmapped_area = snd_pcm_get_unmapped_area,
3458 },
3459 {
3460 .owner = THIS_MODULE,
3461 .read = snd_pcm_read,
3462 .aio_read = snd_pcm_aio_read,
3463 .open = snd_pcm_capture_open,
3464 .release = snd_pcm_release,
3465 .llseek = no_llseek,
3466 .poll = snd_pcm_capture_poll,
3467 .unlocked_ioctl = snd_pcm_capture_ioctl,
3468 .compat_ioctl = snd_pcm_ioctl_compat,
3469 .mmap = snd_pcm_mmap,
3470 .fasync = snd_pcm_fasync,
3471 .get_unmapped_area = snd_pcm_get_unmapped_area,
3472 }
3473 };
Linux Kernel, db-tree