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tmpfs: support fallocate FALLOC_FL_PUNCH_HOLE
[linux-2.6/libata-dev.git] / sound / core / pcm_native.c
blob53b5ada8f7c36fd5199366662cc0ce5c5233e66c
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/module.h>
24 #include <linux/file.h>
25 #include <linux/slab.h>
26 #include <linux/time.h>
27 #include <linux/pm_qos.h>
28 #include <linux/uio.h>
29 #include <linux/dma-mapping.h>
30 #include <sound/core.h>
31 #include <sound/control.h>
32 #include <sound/info.h>
33 #include <sound/pcm.h>
34 #include <sound/pcm_params.h>
35 #include <sound/timer.h>
36 #include <sound/minors.h>
37 #include <asm/io.h>
38 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
39 #include <dma-coherence.h>
40 #endif
41
42 /*
43 * Compatibility
44 */
45
46 struct snd_pcm_hw_params_old {
47 unsigned int flags;
48 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
49 SNDRV_PCM_HW_PARAM_ACCESS + 1];
50 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
51 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
52 unsigned int rmask;
53 unsigned int cmask;
54 unsigned int info;
55 unsigned int msbits;
56 unsigned int rate_num;
57 unsigned int rate_den;
58 snd_pcm_uframes_t fifo_size;
59 unsigned char reserved[64];
60 };
61
62 #ifdef CONFIG_SND_SUPPORT_OLD_API
63 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
64 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
65
66 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
67 struct snd_pcm_hw_params_old __user * _oparams);
68 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
69 struct snd_pcm_hw_params_old __user * _oparams);
70 #endif
71 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
72
73 /*
74 *
75 */
76
77 DEFINE_RWLOCK(snd_pcm_link_rwlock);
78 EXPORT_SYMBOL(snd_pcm_link_rwlock);
79
80 static DECLARE_RWSEM(snd_pcm_link_rwsem);
81
82 static inline mm_segment_t snd_enter_user(void)
83 {
84 mm_segment_t fs = get_fs();
85 set_fs(get_ds());
86 return fs;
87 }
88
89 static inline void snd_leave_user(mm_segment_t fs)
90 {
91 set_fs(fs);
92 }
93
94
95
96 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
97 {
98 struct snd_pcm_runtime *runtime;
99 struct snd_pcm *pcm = substream->pcm;
100 struct snd_pcm_str *pstr = substream->pstr;
101
102 memset(info, 0, sizeof(*info));
103 info->card = pcm->card->number;
104 info->device = pcm->device;
105 info->stream = substream->stream;
106 info->subdevice = substream->number;
107 strlcpy(info->id, pcm->id, sizeof(info->id));
108 strlcpy(info->name, pcm->name, sizeof(info->name));
109 info->dev_class = pcm->dev_class;
110 info->dev_subclass = pcm->dev_subclass;
111 info->subdevices_count = pstr->substream_count;
112 info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
113 strlcpy(info->subname, substream->name, sizeof(info->subname));
114 runtime = substream->runtime;
115 /* AB: FIXME!!! This is definitely nonsense */
116 if (runtime) {
117 info->sync = runtime->sync;
118 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
119 }
120 return 0;
121 }
122
123 int snd_pcm_info_user(struct snd_pcm_substream *substream,
124 struct snd_pcm_info __user * _info)
125 {
126 struct snd_pcm_info *info;
127 int err;
128
129 info = kmalloc(sizeof(*info), GFP_KERNEL);
130 if (! info)
131 return -ENOMEM;
132 err = snd_pcm_info(substream, info);
133 if (err >= 0) {
134 if (copy_to_user(_info, info, sizeof(*info)))
135 err = -EFAULT;
136 }
137 kfree(info);
138 return err;
139 }
140
141 #undef RULES_DEBUG
142
143 #ifdef RULES_DEBUG
144 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
145 static const char * const snd_pcm_hw_param_names[] = {
146 HW_PARAM(ACCESS),
147 HW_PARAM(FORMAT),
148 HW_PARAM(SUBFORMAT),
149 HW_PARAM(SAMPLE_BITS),
150 HW_PARAM(FRAME_BITS),
151 HW_PARAM(CHANNELS),
152 HW_PARAM(RATE),
153 HW_PARAM(PERIOD_TIME),
154 HW_PARAM(PERIOD_SIZE),
155 HW_PARAM(PERIOD_BYTES),
156 HW_PARAM(PERIODS),
157 HW_PARAM(BUFFER_TIME),
158 HW_PARAM(BUFFER_SIZE),
159 HW_PARAM(BUFFER_BYTES),
160 HW_PARAM(TICK_TIME),
161 };
162 #endif
163
164 int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
165 struct snd_pcm_hw_params *params)
166 {
167 unsigned int k;
168 struct snd_pcm_hardware *hw;
169 struct snd_interval *i = NULL;
170 struct snd_mask *m = NULL;
171 struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
172 unsigned int rstamps[constrs->rules_num];
173 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
174 unsigned int stamp = 2;
175 int changed, again;
176
177 params->info = 0;
178 params->fifo_size = 0;
179 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
180 params->msbits = 0;
181 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
182 params->rate_num = 0;
183 params->rate_den = 0;
184 }
185
186 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
187 m = hw_param_mask(params, k);
188 if (snd_mask_empty(m))
189 return -EINVAL;
190 if (!(params->rmask & (1 << k)))
191 continue;
192 #ifdef RULES_DEBUG
193 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
194 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
195 #endif
196 changed = snd_mask_refine(m, constrs_mask(constrs, k));
197 #ifdef RULES_DEBUG
198 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
199 #endif
200 if (changed)
201 params->cmask |= 1 << k;
202 if (changed < 0)
203 return changed;
204 }
205
206 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
207 i = hw_param_interval(params, k);
208 if (snd_interval_empty(i))
209 return -EINVAL;
210 if (!(params->rmask & (1 << k)))
211 continue;
212 #ifdef RULES_DEBUG
213 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
214 if (i->empty)
215 printk("empty");
216 else
217 printk("%c%u %u%c",
218 i->openmin ? '(' : '[', i->min,
219 i->max, i->openmax ? ')' : ']');
220 printk(" -> ");
221 #endif
222 changed = snd_interval_refine(i, constrs_interval(constrs, k));
223 #ifdef RULES_DEBUG
224 if (i->empty)
225 printk("empty\n");
226 else
227 printk("%c%u %u%c\n",
228 i->openmin ? '(' : '[', i->min,
229 i->max, i->openmax ? ')' : ']');
230 #endif
231 if (changed)
232 params->cmask |= 1 << k;
233 if (changed < 0)
234 return changed;
235 }
236
237 for (k = 0; k < constrs->rules_num; k++)
238 rstamps[k] = 0;
239 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
240 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
241 do {
242 again = 0;
243 for (k = 0; k < constrs->rules_num; k++) {
244 struct snd_pcm_hw_rule *r = &constrs->rules[k];
245 unsigned int d;
246 int doit = 0;
247 if (r->cond && !(r->cond & params->flags))
248 continue;
249 for (d = 0; r->deps[d] >= 0; d++) {
250 if (vstamps[r->deps[d]] > rstamps[k]) {
251 doit = 1;
252 break;
253 }
254 }
255 if (!doit)
256 continue;
257 #ifdef RULES_DEBUG
258 printk(KERN_DEBUG "Rule %d [%p]: ", k, r->func);
259 if (r->var >= 0) {
260 printk("%s = ", snd_pcm_hw_param_names[r->var]);
261 if (hw_is_mask(r->var)) {
262 m = hw_param_mask(params, r->var);
263 printk("%x", *m->bits);
264 } else {
265 i = hw_param_interval(params, r->var);
266 if (i->empty)
267 printk("empty");
268 else
269 printk("%c%u %u%c",
270 i->openmin ? '(' : '[', i->min,
271 i->max, i->openmax ? ')' : ']');
272 }
273 }
274 #endif
275 changed = r->func(params, r);
276 #ifdef RULES_DEBUG
277 if (r->var >= 0) {
278 printk(" -> ");
279 if (hw_is_mask(r->var))
280 printk("%x", *m->bits);
281 else {
282 if (i->empty)
283 printk("empty");
284 else
285 printk("%c%u %u%c",
286 i->openmin ? '(' : '[', i->min,
287 i->max, i->openmax ? ')' : ']');
288 }
289 }
290 printk("\n");
291 #endif
292 rstamps[k] = stamp;
293 if (changed && r->var >= 0) {
294 params->cmask |= (1 << r->var);
295 vstamps[r->var] = stamp;
296 again = 1;
297 }
298 if (changed < 0)
299 return changed;
300 stamp++;
301 }
302 } while (again);
303 if (!params->msbits) {
304 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
305 if (snd_interval_single(i))
306 params->msbits = snd_interval_value(i);
307 }
308
309 if (!params->rate_den) {
310 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
311 if (snd_interval_single(i)) {
312 params->rate_num = snd_interval_value(i);
313 params->rate_den = 1;
314 }
315 }
316
317 hw = &substream->runtime->hw;
318 if (!params->info)
319 params->info = hw->info & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES;
320 if (!params->fifo_size) {
321 m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
322 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
323 if (snd_mask_min(m) == snd_mask_max(m) &&
324 snd_interval_min(i) == snd_interval_max(i)) {
325 changed = substream->ops->ioctl(substream,
326 SNDRV_PCM_IOCTL1_FIFO_SIZE, params);
327 if (changed < 0)
328 return changed;
329 }
330 }
331 params->rmask = 0;
332 return 0;
333 }
334
335 EXPORT_SYMBOL(snd_pcm_hw_refine);
336
337 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
338 struct snd_pcm_hw_params __user * _params)
339 {
340 struct snd_pcm_hw_params *params;
341 int err;
342
343 params = memdup_user(_params, sizeof(*params));
344 if (IS_ERR(params))
345 return PTR_ERR(params);
346
347 err = snd_pcm_hw_refine(substream, params);
348 if (copy_to_user(_params, params, sizeof(*params))) {
349 if (!err)
350 err = -EFAULT;
351 }
352
353 kfree(params);
354 return err;
355 }
356
357 static int period_to_usecs(struct snd_pcm_runtime *runtime)
358 {
359 int usecs;
360
361 if (! runtime->rate)
362 return -1; /* invalid */
363
364 /* take 75% of period time as the deadline */
365 usecs = (750000 / runtime->rate) * runtime->period_size;
366 usecs += ((750000 % runtime->rate) * runtime->period_size) /
367 runtime->rate;
368
369 return usecs;
370 }
371
372 static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
373 struct snd_pcm_hw_params *params)
374 {
375 struct snd_pcm_runtime *runtime;
376 int err, usecs;
377 unsigned int bits;
378 snd_pcm_uframes_t frames;
379
380 if (PCM_RUNTIME_CHECK(substream))
381 return -ENXIO;
382 runtime = substream->runtime;
383 snd_pcm_stream_lock_irq(substream);
384 switch (runtime->status->state) {
385 case SNDRV_PCM_STATE_OPEN:
386 case SNDRV_PCM_STATE_SETUP:
387 case SNDRV_PCM_STATE_PREPARED:
388 break;
389 default:
390 snd_pcm_stream_unlock_irq(substream);
391 return -EBADFD;
392 }
393 snd_pcm_stream_unlock_irq(substream);
394 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
395 if (!substream->oss.oss)
396 #endif
397 if (atomic_read(&substream->mmap_count))
398 return -EBADFD;
399
400 params->rmask = ~0U;
401 err = snd_pcm_hw_refine(substream, params);
402 if (err < 0)
403 goto _error;
404
405 err = snd_pcm_hw_params_choose(substream, params);
406 if (err < 0)
407 goto _error;
408
409 if (substream->ops->hw_params != NULL) {
410 err = substream->ops->hw_params(substream, params);
411 if (err < 0)
412 goto _error;
413 }
414
415 runtime->access = params_access(params);
416 runtime->format = params_format(params);
417 runtime->subformat = params_subformat(params);
418 runtime->channels = params_channels(params);
419 runtime->rate = params_rate(params);
420 runtime->period_size = params_period_size(params);
421 runtime->periods = params_periods(params);
422 runtime->buffer_size = params_buffer_size(params);
423 runtime->info = params->info;
424 runtime->rate_num = params->rate_num;
425 runtime->rate_den = params->rate_den;
426 runtime->no_period_wakeup =
427 (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) &&
428 (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP);
429
430 bits = snd_pcm_format_physical_width(runtime->format);
431 runtime->sample_bits = bits;
432 bits *= runtime->channels;
433 runtime->frame_bits = bits;
434 frames = 1;
435 while (bits % 8 != 0) {
436 bits *= 2;
437 frames *= 2;
438 }
439 runtime->byte_align = bits / 8;
440 runtime->min_align = frames;
441
442 /* Default sw params */
443 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
444 runtime->period_step = 1;
445 runtime->control->avail_min = runtime->period_size;
446 runtime->start_threshold = 1;
447 runtime->stop_threshold = runtime->buffer_size;
448 runtime->silence_threshold = 0;
449 runtime->silence_size = 0;
450 runtime->boundary = runtime->buffer_size;
451 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
452 runtime->boundary *= 2;
453
454 snd_pcm_timer_resolution_change(substream);
455 runtime->status->state = SNDRV_PCM_STATE_SETUP;
456
457 if (pm_qos_request_active(&substream->latency_pm_qos_req))
458 pm_qos_remove_request(&substream->latency_pm_qos_req);
459 if ((usecs = period_to_usecs(runtime)) >= 0)
460 pm_qos_add_request(&substream->latency_pm_qos_req,
461 PM_QOS_CPU_DMA_LATENCY, usecs);
462 return 0;
463 _error:
464 /* hardware might be unusable from this time,
465 so we force application to retry to set
466 the correct hardware parameter settings */
467 runtime->status->state = SNDRV_PCM_STATE_OPEN;
468 if (substream->ops->hw_free != NULL)
469 substream->ops->hw_free(substream);
470 return err;
471 }
472
473 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
474 struct snd_pcm_hw_params __user * _params)
475 {
476 struct snd_pcm_hw_params *params;
477 int err;
478
479 params = memdup_user(_params, sizeof(*params));
480 if (IS_ERR(params))
481 return PTR_ERR(params);
482
483 err = snd_pcm_hw_params(substream, params);
484 if (copy_to_user(_params, params, sizeof(*params))) {
485 if (!err)
486 err = -EFAULT;
487 }
488
489 kfree(params);
490 return err;
491 }
492
493 static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
494 {
495 struct snd_pcm_runtime *runtime;
496 int result = 0;
497
498 if (PCM_RUNTIME_CHECK(substream))
499 return -ENXIO;
500 runtime = substream->runtime;
501 snd_pcm_stream_lock_irq(substream);
502 switch (runtime->status->state) {
503 case SNDRV_PCM_STATE_SETUP:
504 case SNDRV_PCM_STATE_PREPARED:
505 break;
506 default:
507 snd_pcm_stream_unlock_irq(substream);
508 return -EBADFD;
509 }
510 snd_pcm_stream_unlock_irq(substream);
511 if (atomic_read(&substream->mmap_count))
512 return -EBADFD;
513 if (substream->ops->hw_free)
514 result = substream->ops->hw_free(substream);
515 runtime->status->state = SNDRV_PCM_STATE_OPEN;
516 pm_qos_remove_request(&substream->latency_pm_qos_req);
517 return result;
518 }
519
520 static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
521 struct snd_pcm_sw_params *params)
522 {
523 struct snd_pcm_runtime *runtime;
524 int err;
525
526 if (PCM_RUNTIME_CHECK(substream))
527 return -ENXIO;
528 runtime = substream->runtime;
529 snd_pcm_stream_lock_irq(substream);
530 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
531 snd_pcm_stream_unlock_irq(substream);
532 return -EBADFD;
533 }
534 snd_pcm_stream_unlock_irq(substream);
535
536 if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
537 return -EINVAL;
538 if (params->avail_min == 0)
539 return -EINVAL;
540 if (params->silence_size >= runtime->boundary) {
541 if (params->silence_threshold != 0)
542 return -EINVAL;
543 } else {
544 if (params->silence_size > params->silence_threshold)
545 return -EINVAL;
546 if (params->silence_threshold > runtime->buffer_size)
547 return -EINVAL;
548 }
549 err = 0;
550 snd_pcm_stream_lock_irq(substream);
551 runtime->tstamp_mode = params->tstamp_mode;
552 runtime->period_step = params->period_step;
553 runtime->control->avail_min = params->avail_min;
554 runtime->start_threshold = params->start_threshold;
555 runtime->stop_threshold = params->stop_threshold;
556 runtime->silence_threshold = params->silence_threshold;
557 runtime->silence_size = params->silence_size;
558 params->boundary = runtime->boundary;
559 if (snd_pcm_running(substream)) {
560 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
561 runtime->silence_size > 0)
562 snd_pcm_playback_silence(substream, ULONG_MAX);
563 err = snd_pcm_update_state(substream, runtime);
564 }
565 snd_pcm_stream_unlock_irq(substream);
566 return err;
567 }
568
569 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
570 struct snd_pcm_sw_params __user * _params)
571 {
572 struct snd_pcm_sw_params params;
573 int err;
574 if (copy_from_user(&params, _params, sizeof(params)))
575 return -EFAULT;
576 err = snd_pcm_sw_params(substream, &params);
577 if (copy_to_user(_params, &params, sizeof(params)))
578 return -EFAULT;
579 return err;
580 }
581
582 int snd_pcm_status(struct snd_pcm_substream *substream,
583 struct snd_pcm_status *status)
584 {
585 struct snd_pcm_runtime *runtime = substream->runtime;
586
587 snd_pcm_stream_lock_irq(substream);
588 status->state = runtime->status->state;
589 status->suspended_state = runtime->status->suspended_state;
590 if (status->state == SNDRV_PCM_STATE_OPEN)
591 goto _end;
592 status->trigger_tstamp = runtime->trigger_tstamp;
593 if (snd_pcm_running(substream)) {
594 snd_pcm_update_hw_ptr(substream);
595 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
596 status->tstamp = runtime->status->tstamp;
597 goto _tstamp_end;
598 }
599 }
600 snd_pcm_gettime(runtime, &status->tstamp);
601 _tstamp_end:
602 status->appl_ptr = runtime->control->appl_ptr;
603 status->hw_ptr = runtime->status->hw_ptr;
604 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
605 status->avail = snd_pcm_playback_avail(runtime);
606 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
607 runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
608 status->delay = runtime->buffer_size - status->avail;
609 status->delay += runtime->delay;
610 } else
611 status->delay = 0;
612 } else {
613 status->avail = snd_pcm_capture_avail(runtime);
614 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
615 status->delay = status->avail + runtime->delay;
616 else
617 status->delay = 0;
618 }
619 status->avail_max = runtime->avail_max;
620 status->overrange = runtime->overrange;
621 runtime->avail_max = 0;
622 runtime->overrange = 0;
623 _end:
624 snd_pcm_stream_unlock_irq(substream);
625 return 0;
626 }
627
628 static int snd_pcm_status_user(struct snd_pcm_substream *substream,
629 struct snd_pcm_status __user * _status)
630 {
631 struct snd_pcm_status status;
632 int res;
633
634 memset(&status, 0, sizeof(status));
635 res = snd_pcm_status(substream, &status);
636 if (res < 0)
637 return res;
638 if (copy_to_user(_status, &status, sizeof(status)))
639 return -EFAULT;
640 return 0;
641 }
642
643 static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
644 struct snd_pcm_channel_info * info)
645 {
646 struct snd_pcm_runtime *runtime;
647 unsigned int channel;
648
649 channel = info->channel;
650 runtime = substream->runtime;
651 snd_pcm_stream_lock_irq(substream);
652 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
653 snd_pcm_stream_unlock_irq(substream);
654 return -EBADFD;
655 }
656 snd_pcm_stream_unlock_irq(substream);
657 if (channel >= runtime->channels)
658 return -EINVAL;
659 memset(info, 0, sizeof(*info));
660 info->channel = channel;
661 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
662 }
663
664 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
665 struct snd_pcm_channel_info __user * _info)
666 {
667 struct snd_pcm_channel_info info;
668 int res;
669
670 if (copy_from_user(&info, _info, sizeof(info)))
671 return -EFAULT;
672 res = snd_pcm_channel_info(substream, &info);
673 if (res < 0)
674 return res;
675 if (copy_to_user(_info, &info, sizeof(info)))
676 return -EFAULT;
677 return 0;
678 }
679
680 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
681 {
682 struct snd_pcm_runtime *runtime = substream->runtime;
683 if (runtime->trigger_master == NULL)
684 return;
685 if (runtime->trigger_master == substream) {
686 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
687 } else {
688 snd_pcm_trigger_tstamp(runtime->trigger_master);
689 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
690 }
691 runtime->trigger_master = NULL;
692 }
693
694 struct action_ops {
695 int (*pre_action)(struct snd_pcm_substream *substream, int state);
696 int (*do_action)(struct snd_pcm_substream *substream, int state);
697 void (*undo_action)(struct snd_pcm_substream *substream, int state);
698 void (*post_action)(struct snd_pcm_substream *substream, int state);
699 };
700
701 /*
702 * this functions is core for handling of linked stream
703 * Note: the stream state might be changed also on failure
704 * Note2: call with calling stream lock + link lock
705 */
706 static int snd_pcm_action_group(struct action_ops *ops,
707 struct snd_pcm_substream *substream,
708 int state, int do_lock)
709 {
710 struct snd_pcm_substream *s = NULL;
711 struct snd_pcm_substream *s1;
712 int res = 0;
713
714 snd_pcm_group_for_each_entry(s, substream) {
715 if (do_lock && s != substream)
716 spin_lock_nested(&s->self_group.lock,
717 SINGLE_DEPTH_NESTING);
718 res = ops->pre_action(s, state);
719 if (res < 0)
720 goto _unlock;
721 }
722 snd_pcm_group_for_each_entry(s, substream) {
723 res = ops->do_action(s, state);
724 if (res < 0) {
725 if (ops->undo_action) {
726 snd_pcm_group_for_each_entry(s1, substream) {
727 if (s1 == s) /* failed stream */
728 break;
729 ops->undo_action(s1, state);
730 }
731 }
732 s = NULL; /* unlock all */
733 goto _unlock;
734 }
735 }
736 snd_pcm_group_for_each_entry(s, substream) {
737 ops->post_action(s, state);
738 }
739 _unlock:
740 if (do_lock) {
741 /* unlock streams */
742 snd_pcm_group_for_each_entry(s1, substream) {
743 if (s1 != substream)
744 spin_unlock(&s1->self_group.lock);
745 if (s1 == s) /* end */
746 break;
747 }
748 }
749 return res;
750 }
751
752 /*
753 * Note: call with stream lock
754 */
755 static int snd_pcm_action_single(struct action_ops *ops,
756 struct snd_pcm_substream *substream,
757 int state)
758 {
759 int res;
760
761 res = ops->pre_action(substream, state);
762 if (res < 0)
763 return res;
764 res = ops->do_action(substream, state);
765 if (res == 0)
766 ops->post_action(substream, state);
767 else if (ops->undo_action)
768 ops->undo_action(substream, state);
769 return res;
770 }
771
772 /*
773 * Note: call with stream lock
774 */
775 static int snd_pcm_action(struct action_ops *ops,
776 struct snd_pcm_substream *substream,
777 int state)
778 {
779 int res;
780
781 if (snd_pcm_stream_linked(substream)) {
782 if (!spin_trylock(&substream->group->lock)) {
783 spin_unlock(&substream->self_group.lock);
784 spin_lock(&substream->group->lock);
785 spin_lock(&substream->self_group.lock);
786 }
787 res = snd_pcm_action_group(ops, substream, state, 1);
788 spin_unlock(&substream->group->lock);
789 } else {
790 res = snd_pcm_action_single(ops, substream, state);
791 }
792 return res;
793 }
794
795 /*
796 * Note: don't use any locks before
797 */
798 static int snd_pcm_action_lock_irq(struct action_ops *ops,
799 struct snd_pcm_substream *substream,
800 int state)
801 {
802 int res;
803
804 read_lock_irq(&snd_pcm_link_rwlock);
805 if (snd_pcm_stream_linked(substream)) {
806 spin_lock(&substream->group->lock);
807 spin_lock(&substream->self_group.lock);
808 res = snd_pcm_action_group(ops, substream, state, 1);
809 spin_unlock(&substream->self_group.lock);
810 spin_unlock(&substream->group->lock);
811 } else {
812 spin_lock(&substream->self_group.lock);
813 res = snd_pcm_action_single(ops, substream, state);
814 spin_unlock(&substream->self_group.lock);
815 }
816 read_unlock_irq(&snd_pcm_link_rwlock);
817 return res;
818 }
819
820 /*
821 */
822 static int snd_pcm_action_nonatomic(struct action_ops *ops,
823 struct snd_pcm_substream *substream,
824 int state)
825 {
826 int res;
827
828 down_read(&snd_pcm_link_rwsem);
829 if (snd_pcm_stream_linked(substream))
830 res = snd_pcm_action_group(ops, substream, state, 0);
831 else
832 res = snd_pcm_action_single(ops, substream, state);
833 up_read(&snd_pcm_link_rwsem);
834 return res;
835 }
836
837 /*
838 * start callbacks
839 */
840 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
841 {
842 struct snd_pcm_runtime *runtime = substream->runtime;
843 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
844 return -EBADFD;
845 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
846 !snd_pcm_playback_data(substream))
847 return -EPIPE;
848 runtime->trigger_master = substream;
849 return 0;
850 }
851
852 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
853 {
854 if (substream->runtime->trigger_master != substream)
855 return 0;
856 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
857 }
858
859 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
860 {
861 if (substream->runtime->trigger_master == substream)
862 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
863 }
864
865 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
866 {
867 struct snd_pcm_runtime *runtime = substream->runtime;
868 snd_pcm_trigger_tstamp(substream);
869 runtime->hw_ptr_jiffies = jiffies;
870 runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) /
871 runtime->rate;
872 runtime->status->state = state;
873 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
874 runtime->silence_size > 0)
875 snd_pcm_playback_silence(substream, ULONG_MAX);
876 if (substream->timer)
877 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
878 &runtime->trigger_tstamp);
879 }
880
881 static struct action_ops snd_pcm_action_start = {
882 .pre_action = snd_pcm_pre_start,
883 .do_action = snd_pcm_do_start,
884 .undo_action = snd_pcm_undo_start,
885 .post_action = snd_pcm_post_start
886 };
887
888 /**
889 * snd_pcm_start - start all linked streams
890 * @substream: the PCM substream instance
891 */
892 int snd_pcm_start(struct snd_pcm_substream *substream)
893 {
894 return snd_pcm_action(&snd_pcm_action_start, substream,
895 SNDRV_PCM_STATE_RUNNING);
896 }
897
898 /*
899 * stop callbacks
900 */
901 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
902 {
903 struct snd_pcm_runtime *runtime = substream->runtime;
904 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
905 return -EBADFD;
906 runtime->trigger_master = substream;
907 return 0;
908 }
909
910 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
911 {
912 if (substream->runtime->trigger_master == substream &&
913 snd_pcm_running(substream))
914 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
915 return 0; /* unconditonally stop all substreams */
916 }
917
918 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
919 {
920 struct snd_pcm_runtime *runtime = substream->runtime;
921 if (runtime->status->state != state) {
922 snd_pcm_trigger_tstamp(substream);
923 if (substream->timer)
924 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
925 &runtime->trigger_tstamp);
926 runtime->status->state = state;
927 }
928 wake_up(&runtime->sleep);
929 wake_up(&runtime->tsleep);
930 }
931
932 static struct action_ops snd_pcm_action_stop = {
933 .pre_action = snd_pcm_pre_stop,
934 .do_action = snd_pcm_do_stop,
935 .post_action = snd_pcm_post_stop
936 };
937
938 /**
939 * snd_pcm_stop - try to stop all running streams in the substream group
940 * @substream: the PCM substream instance
941 * @state: PCM state after stopping the stream
942 *
943 * The state of each stream is then changed to the given state unconditionally.
944 */
945 int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state)
946 {
947 return snd_pcm_action(&snd_pcm_action_stop, substream, state);
948 }
949
950 EXPORT_SYMBOL(snd_pcm_stop);
951
952 /**
953 * snd_pcm_drain_done - stop the DMA only when the given stream is playback
954 * @substream: the PCM substream
955 *
956 * After stopping, the state is changed to SETUP.
957 * Unlike snd_pcm_stop(), this affects only the given stream.
958 */
959 int snd_pcm_drain_done(struct snd_pcm_substream *substream)
960 {
961 return snd_pcm_action_single(&snd_pcm_action_stop, substream,
962 SNDRV_PCM_STATE_SETUP);
963 }
964
965 /*
966 * pause callbacks
967 */
968 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
969 {
970 struct snd_pcm_runtime *runtime = substream->runtime;
971 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
972 return -ENOSYS;
973 if (push) {
974 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
975 return -EBADFD;
976 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
977 return -EBADFD;
978 runtime->trigger_master = substream;
979 return 0;
980 }
981
982 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
983 {
984 if (substream->runtime->trigger_master != substream)
985 return 0;
986 /* some drivers might use hw_ptr to recover from the pause -
987 update the hw_ptr now */
988 if (push)
989 snd_pcm_update_hw_ptr(substream);
990 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
991 * a delta between the current jiffies, this gives a large enough
992 * delta, effectively to skip the check once.
993 */
994 substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
995 return substream->ops->trigger(substream,
996 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
997 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
998 }
999
1000 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
1001 {
1002 if (substream->runtime->trigger_master == substream)
1003 substream->ops->trigger(substream,
1004 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
1005 SNDRV_PCM_TRIGGER_PAUSE_PUSH);
1006 }
1007
1008 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
1009 {
1010 struct snd_pcm_runtime *runtime = substream->runtime;
1011 snd_pcm_trigger_tstamp(substream);
1012 if (push) {
1013 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1014 if (substream->timer)
1015 snd_timer_notify(substream->timer,
1016 SNDRV_TIMER_EVENT_MPAUSE,
1017 &runtime->trigger_tstamp);
1018 wake_up(&runtime->sleep);
1019 wake_up(&runtime->tsleep);
1020 } else {
1021 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1022 if (substream->timer)
1023 snd_timer_notify(substream->timer,
1024 SNDRV_TIMER_EVENT_MCONTINUE,
1025 &runtime->trigger_tstamp);
1026 }
1027 }
1028
1029 static struct action_ops snd_pcm_action_pause = {
1030 .pre_action = snd_pcm_pre_pause,
1031 .do_action = snd_pcm_do_pause,
1032 .undo_action = snd_pcm_undo_pause,
1033 .post_action = snd_pcm_post_pause
1034 };
1035
1036 /*
1037 * Push/release the pause for all linked streams.
1038 */
1039 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1040 {
1041 return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1042 }
1043
1044 #ifdef CONFIG_PM
1045 /* suspend */
1046
1047 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1048 {
1049 struct snd_pcm_runtime *runtime = substream->runtime;
1050 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1051 return -EBUSY;
1052 runtime->trigger_master = substream;
1053 return 0;
1054 }
1055
1056 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1057 {
1058 struct snd_pcm_runtime *runtime = substream->runtime;
1059 if (runtime->trigger_master != substream)
1060 return 0;
1061 if (! snd_pcm_running(substream))
1062 return 0;
1063 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1064 return 0; /* suspend unconditionally */
1065 }
1066
1067 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1068 {
1069 struct snd_pcm_runtime *runtime = substream->runtime;
1070 snd_pcm_trigger_tstamp(substream);
1071 if (substream->timer)
1072 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1073 &runtime->trigger_tstamp);
1074 runtime->status->suspended_state = runtime->status->state;
1075 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1076 wake_up(&runtime->sleep);
1077 wake_up(&runtime->tsleep);
1078 }
1079
1080 static struct action_ops snd_pcm_action_suspend = {
1081 .pre_action = snd_pcm_pre_suspend,
1082 .do_action = snd_pcm_do_suspend,
1083 .post_action = snd_pcm_post_suspend
1084 };
1085
1086 /**
1087 * snd_pcm_suspend - trigger SUSPEND to all linked streams
1088 * @substream: the PCM substream
1089 *
1090 * After this call, all streams are changed to SUSPENDED state.
1091 */
1092 int snd_pcm_suspend(struct snd_pcm_substream *substream)
1093 {
1094 int err;
1095 unsigned long flags;
1096
1097 if (! substream)
1098 return 0;
1099
1100 snd_pcm_stream_lock_irqsave(substream, flags);
1101 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1102 snd_pcm_stream_unlock_irqrestore(substream, flags);
1103 return err;
1104 }
1105
1106 EXPORT_SYMBOL(snd_pcm_suspend);
1107
1108 /**
1109 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
1110 * @pcm: the PCM instance
1111 *
1112 * After this call, all streams are changed to SUSPENDED state.
1113 */
1114 int snd_pcm_suspend_all(struct snd_pcm *pcm)
1115 {
1116 struct snd_pcm_substream *substream;
1117 int stream, err = 0;
1118
1119 if (! pcm)
1120 return 0;
1121
1122 for (stream = 0; stream < 2; stream++) {
1123 for (substream = pcm->streams[stream].substream;
1124 substream; substream = substream->next) {
1125 /* FIXME: the open/close code should lock this as well */
1126 if (substream->runtime == NULL)
1127 continue;
1128 err = snd_pcm_suspend(substream);
1129 if (err < 0 && err != -EBUSY)
1130 return err;
1131 }
1132 }
1133 return 0;
1134 }
1135
1136 EXPORT_SYMBOL(snd_pcm_suspend_all);
1137
1138 /* resume */
1139
1140 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1141 {
1142 struct snd_pcm_runtime *runtime = substream->runtime;
1143 if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1144 return -ENOSYS;
1145 runtime->trigger_master = substream;
1146 return 0;
1147 }
1148
1149 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1150 {
1151 struct snd_pcm_runtime *runtime = substream->runtime;
1152 if (runtime->trigger_master != substream)
1153 return 0;
1154 /* DMA not running previously? */
1155 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1156 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1157 substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1158 return 0;
1159 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1160 }
1161
1162 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1163 {
1164 if (substream->runtime->trigger_master == substream &&
1165 snd_pcm_running(substream))
1166 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1167 }
1168
1169 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1170 {
1171 struct snd_pcm_runtime *runtime = substream->runtime;
1172 snd_pcm_trigger_tstamp(substream);
1173 if (substream->timer)
1174 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1175 &runtime->trigger_tstamp);
1176 runtime->status->state = runtime->status->suspended_state;
1177 }
1178
1179 static struct action_ops snd_pcm_action_resume = {
1180 .pre_action = snd_pcm_pre_resume,
1181 .do_action = snd_pcm_do_resume,
1182 .undo_action = snd_pcm_undo_resume,
1183 .post_action = snd_pcm_post_resume
1184 };
1185
1186 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1187 {
1188 struct snd_card *card = substream->pcm->card;
1189 int res;
1190
1191 snd_power_lock(card);
1192 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1193 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1194 snd_power_unlock(card);
1195 return res;
1196 }
1197
1198 #else
1199
1200 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1201 {
1202 return -ENOSYS;
1203 }
1204
1205 #endif /* CONFIG_PM */
1206
1207 /*
1208 * xrun ioctl
1209 *
1210 * Change the RUNNING stream(s) to XRUN state.
1211 */
1212 static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1213 {
1214 struct snd_card *card = substream->pcm->card;
1215 struct snd_pcm_runtime *runtime = substream->runtime;
1216 int result;
1217
1218 snd_power_lock(card);
1219 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1220 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1221 if (result < 0)
1222 goto _unlock;
1223 }
1224
1225 snd_pcm_stream_lock_irq(substream);
1226 switch (runtime->status->state) {
1227 case SNDRV_PCM_STATE_XRUN:
1228 result = 0; /* already there */
1229 break;
1230 case SNDRV_PCM_STATE_RUNNING:
1231 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1232 break;
1233 default:
1234 result = -EBADFD;
1235 }
1236 snd_pcm_stream_unlock_irq(substream);
1237 _unlock:
1238 snd_power_unlock(card);
1239 return result;
1240 }
1241
1242 /*
1243 * reset ioctl
1244 */
1245 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1246 {
1247 struct snd_pcm_runtime *runtime = substream->runtime;
1248 switch (runtime->status->state) {
1249 case SNDRV_PCM_STATE_RUNNING:
1250 case SNDRV_PCM_STATE_PREPARED:
1251 case SNDRV_PCM_STATE_PAUSED:
1252 case SNDRV_PCM_STATE_SUSPENDED:
1253 return 0;
1254 default:
1255 return -EBADFD;
1256 }
1257 }
1258
1259 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1260 {
1261 struct snd_pcm_runtime *runtime = substream->runtime;
1262 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1263 if (err < 0)
1264 return err;
1265 runtime->hw_ptr_base = 0;
1266 runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1267 runtime->status->hw_ptr % runtime->period_size;
1268 runtime->silence_start = runtime->status->hw_ptr;
1269 runtime->silence_filled = 0;
1270 return 0;
1271 }
1272
1273 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1274 {
1275 struct snd_pcm_runtime *runtime = substream->runtime;
1276 runtime->control->appl_ptr = runtime->status->hw_ptr;
1277 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1278 runtime->silence_size > 0)
1279 snd_pcm_playback_silence(substream, ULONG_MAX);
1280 }
1281
1282 static struct action_ops snd_pcm_action_reset = {
1283 .pre_action = snd_pcm_pre_reset,
1284 .do_action = snd_pcm_do_reset,
1285 .post_action = snd_pcm_post_reset
1286 };
1287
1288 static int snd_pcm_reset(struct snd_pcm_substream *substream)
1289 {
1290 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1291 }
1292
1293 /*
1294 * prepare ioctl
1295 */
1296 /* we use the second argument for updating f_flags */
1297 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1298 int f_flags)
1299 {
1300 struct snd_pcm_runtime *runtime = substream->runtime;
1301 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1302 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1303 return -EBADFD;
1304 if (snd_pcm_running(substream))
1305 return -EBUSY;
1306 substream->f_flags = f_flags;
1307 return 0;
1308 }
1309
1310 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1311 {
1312 int err;
1313 err = substream->ops->prepare(substream);
1314 if (err < 0)
1315 return err;
1316 return snd_pcm_do_reset(substream, 0);
1317 }
1318
1319 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1320 {
1321 struct snd_pcm_runtime *runtime = substream->runtime;
1322 runtime->control->appl_ptr = runtime->status->hw_ptr;
1323 runtime->status->state = SNDRV_PCM_STATE_PREPARED;
1324 }
1325
1326 static struct action_ops snd_pcm_action_prepare = {
1327 .pre_action = snd_pcm_pre_prepare,
1328 .do_action = snd_pcm_do_prepare,
1329 .post_action = snd_pcm_post_prepare
1330 };
1331
1332 /**
1333 * snd_pcm_prepare - prepare the PCM substream to be triggerable
1334 * @substream: the PCM substream instance
1335 * @file: file to refer f_flags
1336 */
1337 static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1338 struct file *file)
1339 {
1340 int res;
1341 struct snd_card *card = substream->pcm->card;
1342 int f_flags;
1343
1344 if (file)
1345 f_flags = file->f_flags;
1346 else
1347 f_flags = substream->f_flags;
1348
1349 snd_power_lock(card);
1350 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1351 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1352 substream, f_flags);
1353 snd_power_unlock(card);
1354 return res;
1355 }
1356
1357 /*
1358 * drain ioctl
1359 */
1360
1361 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1362 {
1363 struct snd_pcm_runtime *runtime = substream->runtime;
1364 switch (runtime->status->state) {
1365 case SNDRV_PCM_STATE_OPEN:
1366 case SNDRV_PCM_STATE_DISCONNECTED:
1367 case SNDRV_PCM_STATE_SUSPENDED:
1368 return -EBADFD;
1369 }
1370 runtime->trigger_master = substream;
1371 return 0;
1372 }
1373
1374 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1375 {
1376 struct snd_pcm_runtime *runtime = substream->runtime;
1377 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1378 switch (runtime->status->state) {
1379 case SNDRV_PCM_STATE_PREPARED:
1380 /* start playback stream if possible */
1381 if (! snd_pcm_playback_empty(substream)) {
1382 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1383 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1384 }
1385 break;
1386 case SNDRV_PCM_STATE_RUNNING:
1387 runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1388 break;
1389 case SNDRV_PCM_STATE_XRUN:
1390 runtime->status->state = SNDRV_PCM_STATE_SETUP;
1391 break;
1392 default:
1393 break;
1394 }
1395 } else {
1396 /* stop running stream */
1397 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1398 int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1399 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1400 snd_pcm_do_stop(substream, new_state);
1401 snd_pcm_post_stop(substream, new_state);
1402 }
1403 }
1404 return 0;
1405 }
1406
1407 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1408 {
1409 }
1410
1411 static struct action_ops snd_pcm_action_drain_init = {
1412 .pre_action = snd_pcm_pre_drain_init,
1413 .do_action = snd_pcm_do_drain_init,
1414 .post_action = snd_pcm_post_drain_init
1415 };
1416
1417 static int snd_pcm_drop(struct snd_pcm_substream *substream);
1418
1419 /*
1420 * Drain the stream(s).
1421 * When the substream is linked, sync until the draining of all playback streams
1422 * is finished.
1423 * After this call, all streams are supposed to be either SETUP or DRAINING
1424 * (capture only) state.
1425 */
1426 static int snd_pcm_drain(struct snd_pcm_substream *substream,
1427 struct file *file)
1428 {
1429 struct snd_card *card;
1430 struct snd_pcm_runtime *runtime;
1431 struct snd_pcm_substream *s;
1432 wait_queue_t wait;
1433 int result = 0;
1434 int nonblock = 0;
1435
1436 card = substream->pcm->card;
1437 runtime = substream->runtime;
1438
1439 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1440 return -EBADFD;
1441
1442 snd_power_lock(card);
1443 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1444 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1445 if (result < 0) {
1446 snd_power_unlock(card);
1447 return result;
1448 }
1449 }
1450
1451 if (file) {
1452 if (file->f_flags & O_NONBLOCK)
1453 nonblock = 1;
1454 } else if (substream->f_flags & O_NONBLOCK)
1455 nonblock = 1;
1456
1457 down_read(&snd_pcm_link_rwsem);
1458 snd_pcm_stream_lock_irq(substream);
1459 /* resume pause */
1460 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1461 snd_pcm_pause(substream, 0);
1462
1463 /* pre-start/stop - all running streams are changed to DRAINING state */
1464 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1465 if (result < 0)
1466 goto unlock;
1467 /* in non-blocking, we don't wait in ioctl but let caller poll */
1468 if (nonblock) {
1469 result = -EAGAIN;
1470 goto unlock;
1471 }
1472
1473 for (;;) {
1474 long tout;
1475 struct snd_pcm_runtime *to_check;
1476 if (signal_pending(current)) {
1477 result = -ERESTARTSYS;
1478 break;
1479 }
1480 /* find a substream to drain */
1481 to_check = NULL;
1482 snd_pcm_group_for_each_entry(s, substream) {
1483 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1484 continue;
1485 runtime = s->runtime;
1486 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1487 to_check = runtime;
1488 break;
1489 }
1490 }
1491 if (!to_check)
1492 break; /* all drained */
1493 init_waitqueue_entry(&wait, current);
1494 add_wait_queue(&to_check->sleep, &wait);
1495 snd_pcm_stream_unlock_irq(substream);
1496 up_read(&snd_pcm_link_rwsem);
1497 snd_power_unlock(card);
1498 if (runtime->no_period_wakeup)
1499 tout = MAX_SCHEDULE_TIMEOUT;
1500 else {
1501 tout = 10;
1502 if (runtime->rate) {
1503 long t = runtime->period_size * 2 / runtime->rate;
1504 tout = max(t, tout);
1505 }
1506 tout = msecs_to_jiffies(tout * 1000);
1507 }
1508 tout = schedule_timeout_interruptible(tout);
1509 snd_power_lock(card);
1510 down_read(&snd_pcm_link_rwsem);
1511 snd_pcm_stream_lock_irq(substream);
1512 remove_wait_queue(&to_check->sleep, &wait);
1513 if (tout == 0) {
1514 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1515 result = -ESTRPIPE;
1516 else {
1517 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1518 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1519 result = -EIO;
1520 }
1521 break;
1522 }
1523 }
1524
1525 unlock:
1526 snd_pcm_stream_unlock_irq(substream);
1527 up_read(&snd_pcm_link_rwsem);
1528 snd_power_unlock(card);
1529
1530 return result;
1531 }
1532
1533 /*
1534 * drop ioctl
1535 *
1536 * Immediately put all linked substreams into SETUP state.
1537 */
1538 static int snd_pcm_drop(struct snd_pcm_substream *substream)
1539 {
1540 struct snd_pcm_runtime *runtime;
1541 int result = 0;
1542
1543 if (PCM_RUNTIME_CHECK(substream))
1544 return -ENXIO;
1545 runtime = substream->runtime;
1546
1547 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1548 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1549 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1550 return -EBADFD;
1551
1552 snd_pcm_stream_lock_irq(substream);
1553 /* resume pause */
1554 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1555 snd_pcm_pause(substream, 0);
1556
1557 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1558 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1559 snd_pcm_stream_unlock_irq(substream);
1560
1561 return result;
1562 }
1563
1564
1565 /* WARNING: Don't forget to fput back the file */
1566 static struct file *snd_pcm_file_fd(int fd)
1567 {
1568 struct file *file;
1569 struct inode *inode;
1570 unsigned int minor;
1571
1572 file = fget(fd);
1573 if (!file)
1574 return NULL;
1575 inode = file->f_path.dentry->d_inode;
1576 if (!S_ISCHR(inode->i_mode) ||
1577 imajor(inode) != snd_major) {
1578 fput(file);
1579 return NULL;
1580 }
1581 minor = iminor(inode);
1582 if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) &&
1583 !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) {
1584 fput(file);
1585 return NULL;
1586 }
1587 return file;
1588 }
1589
1590 /*
1591 * PCM link handling
1592 */
1593 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1594 {
1595 int res = 0;
1596 struct file *file;
1597 struct snd_pcm_file *pcm_file;
1598 struct snd_pcm_substream *substream1;
1599 struct snd_pcm_group *group;
1600
1601 file = snd_pcm_file_fd(fd);
1602 if (!file)
1603 return -EBADFD;
1604 pcm_file = file->private_data;
1605 substream1 = pcm_file->substream;
1606 group = kmalloc(sizeof(*group), GFP_KERNEL);
1607 if (!group) {
1608 res = -ENOMEM;
1609 goto _nolock;
1610 }
1611 down_write(&snd_pcm_link_rwsem);
1612 write_lock_irq(&snd_pcm_link_rwlock);
1613 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1614 substream->runtime->status->state != substream1->runtime->status->state) {
1615 res = -EBADFD;
1616 goto _end;
1617 }
1618 if (snd_pcm_stream_linked(substream1)) {
1619 res = -EALREADY;
1620 goto _end;
1621 }
1622 if (!snd_pcm_stream_linked(substream)) {
1623 substream->group = group;
1624 spin_lock_init(&substream->group->lock);
1625 INIT_LIST_HEAD(&substream->group->substreams);
1626 list_add_tail(&substream->link_list, &substream->group->substreams);
1627 substream->group->count = 1;
1628 }
1629 list_add_tail(&substream1->link_list, &substream->group->substreams);
1630 substream->group->count++;
1631 substream1->group = substream->group;
1632 _end:
1633 write_unlock_irq(&snd_pcm_link_rwlock);
1634 up_write(&snd_pcm_link_rwsem);
1635 _nolock:
1636 fput(file);
1637 if (res < 0)
1638 kfree(group);
1639 return res;
1640 }
1641
1642 static void relink_to_local(struct snd_pcm_substream *substream)
1643 {
1644 substream->group = &substream->self_group;
1645 INIT_LIST_HEAD(&substream->self_group.substreams);
1646 list_add_tail(&substream->link_list, &substream->self_group.substreams);
1647 }
1648
1649 static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1650 {
1651 struct snd_pcm_substream *s;
1652 int res = 0;
1653
1654 down_write(&snd_pcm_link_rwsem);
1655 write_lock_irq(&snd_pcm_link_rwlock);
1656 if (!snd_pcm_stream_linked(substream)) {
1657 res = -EALREADY;
1658 goto _end;
1659 }
1660 list_del(&substream->link_list);
1661 substream->group->count--;
1662 if (substream->group->count == 1) { /* detach the last stream, too */
1663 snd_pcm_group_for_each_entry(s, substream) {
1664 relink_to_local(s);
1665 break;
1666 }
1667 kfree(substream->group);
1668 }
1669 relink_to_local(substream);
1670 _end:
1671 write_unlock_irq(&snd_pcm_link_rwlock);
1672 up_write(&snd_pcm_link_rwsem);
1673 return res;
1674 }
1675
1676 /*
1677 * hw configurator
1678 */
1679 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1680 struct snd_pcm_hw_rule *rule)
1681 {
1682 struct snd_interval t;
1683 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1684 hw_param_interval_c(params, rule->deps[1]), &t);
1685 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1686 }
1687
1688 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1689 struct snd_pcm_hw_rule *rule)
1690 {
1691 struct snd_interval t;
1692 snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1693 hw_param_interval_c(params, rule->deps[1]), &t);
1694 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1695 }
1696
1697 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1698 struct snd_pcm_hw_rule *rule)
1699 {
1700 struct snd_interval t;
1701 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1702 hw_param_interval_c(params, rule->deps[1]),
1703 (unsigned long) rule->private, &t);
1704 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1705 }
1706
1707 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1708 struct snd_pcm_hw_rule *rule)
1709 {
1710 struct snd_interval t;
1711 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1712 (unsigned long) rule->private,
1713 hw_param_interval_c(params, rule->deps[1]), &t);
1714 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1715 }
1716
1717 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1718 struct snd_pcm_hw_rule *rule)
1719 {
1720 unsigned int k;
1721 struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1722 struct snd_mask m;
1723 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1724 snd_mask_any(&m);
1725 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1726 int bits;
1727 if (! snd_mask_test(mask, k))
1728 continue;
1729 bits = snd_pcm_format_physical_width(k);
1730 if (bits <= 0)
1731 continue; /* ignore invalid formats */
1732 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1733 snd_mask_reset(&m, k);
1734 }
1735 return snd_mask_refine(mask, &m);
1736 }
1737
1738 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1739 struct snd_pcm_hw_rule *rule)
1740 {
1741 struct snd_interval t;
1742 unsigned int k;
1743 t.min = UINT_MAX;
1744 t.max = 0;
1745 t.openmin = 0;
1746 t.openmax = 0;
1747 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1748 int bits;
1749 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1750 continue;
1751 bits = snd_pcm_format_physical_width(k);
1752 if (bits <= 0)
1753 continue; /* ignore invalid formats */
1754 if (t.min > (unsigned)bits)
1755 t.min = bits;
1756 if (t.max < (unsigned)bits)
1757 t.max = bits;
1758 }
1759 t.integer = 1;
1760 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1761 }
1762
1763 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1764 #error "Change this table"
1765 #endif
1766
1767 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1768 48000, 64000, 88200, 96000, 176400, 192000 };
1769
1770 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1771 .count = ARRAY_SIZE(rates),
1772 .list = rates,
1773 };
1774
1775 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1776 struct snd_pcm_hw_rule *rule)
1777 {
1778 struct snd_pcm_hardware *hw = rule->private;
1779 return snd_interval_list(hw_param_interval(params, rule->var),
1780 snd_pcm_known_rates.count,
1781 snd_pcm_known_rates.list, hw->rates);
1782 }
1783
1784 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1785 struct snd_pcm_hw_rule *rule)
1786 {
1787 struct snd_interval t;
1788 struct snd_pcm_substream *substream = rule->private;
1789 t.min = 0;
1790 t.max = substream->buffer_bytes_max;
1791 t.openmin = 0;
1792 t.openmax = 0;
1793 t.integer = 1;
1794 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1795 }
1796
1797 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1798 {
1799 struct snd_pcm_runtime *runtime = substream->runtime;
1800 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1801 int k, err;
1802
1803 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1804 snd_mask_any(constrs_mask(constrs, k));
1805 }
1806
1807 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1808 snd_interval_any(constrs_interval(constrs, k));
1809 }
1810
1811 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1812 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1813 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1814 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1815 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1816
1817 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1818 snd_pcm_hw_rule_format, NULL,
1819 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1820 if (err < 0)
1821 return err;
1822 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1823 snd_pcm_hw_rule_sample_bits, NULL,
1824 SNDRV_PCM_HW_PARAM_FORMAT,
1825 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1826 if (err < 0)
1827 return err;
1828 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1829 snd_pcm_hw_rule_div, NULL,
1830 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1831 if (err < 0)
1832 return err;
1833 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1834 snd_pcm_hw_rule_mul, NULL,
1835 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1836 if (err < 0)
1837 return err;
1838 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1839 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1840 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1841 if (err < 0)
1842 return err;
1843 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1844 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1845 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1846 if (err < 0)
1847 return err;
1848 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1849 snd_pcm_hw_rule_div, NULL,
1850 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1851 if (err < 0)
1852 return err;
1853 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1854 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1855 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1856 if (err < 0)
1857 return err;
1858 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1859 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1860 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1861 if (err < 0)
1862 return err;
1863 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
1864 snd_pcm_hw_rule_div, NULL,
1865 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1866 if (err < 0)
1867 return err;
1868 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1869 snd_pcm_hw_rule_div, NULL,
1870 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1871 if (err < 0)
1872 return err;
1873 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1874 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1875 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1876 if (err < 0)
1877 return err;
1878 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1879 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1880 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1881 if (err < 0)
1882 return err;
1883 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1884 snd_pcm_hw_rule_mul, NULL,
1885 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1886 if (err < 0)
1887 return err;
1888 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1889 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1890 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1891 if (err < 0)
1892 return err;
1893 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1894 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1895 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1896 if (err < 0)
1897 return err;
1898 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1899 snd_pcm_hw_rule_muldivk, (void*) 8,
1900 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1901 if (err < 0)
1902 return err;
1903 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1904 snd_pcm_hw_rule_muldivk, (void*) 8,
1905 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1906 if (err < 0)
1907 return err;
1908 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1909 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1910 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1911 if (err < 0)
1912 return err;
1913 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
1914 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1915 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1916 if (err < 0)
1917 return err;
1918 return 0;
1919 }
1920
1921 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1922 {
1923 struct snd_pcm_runtime *runtime = substream->runtime;
1924 struct snd_pcm_hardware *hw = &runtime->hw;
1925 int err;
1926 unsigned int mask = 0;
1927
1928 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1929 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1930 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1931 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1932 if (hw->info & SNDRV_PCM_INFO_MMAP) {
1933 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1934 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1935 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1936 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1937 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1938 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1939 }
1940 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
1941 if (err < 0)
1942 return err;
1943
1944 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
1945 if (err < 0)
1946 return err;
1947
1948 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
1949 if (err < 0)
1950 return err;
1951
1952 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1953 hw->channels_min, hw->channels_max);
1954 if (err < 0)
1955 return err;
1956
1957 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1958 hw->rate_min, hw->rate_max);
1959 if (err < 0)
1960 return err;
1961
1962 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1963 hw->period_bytes_min, hw->period_bytes_max);
1964 if (err < 0)
1965 return err;
1966
1967 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1968 hw->periods_min, hw->periods_max);
1969 if (err < 0)
1970 return err;
1971
1972 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1973 hw->period_bytes_min, hw->buffer_bytes_max);
1974 if (err < 0)
1975 return err;
1976
1977 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1978 snd_pcm_hw_rule_buffer_bytes_max, substream,
1979 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1980 if (err < 0)
1981 return err;
1982
1983 /* FIXME: remove */
1984 if (runtime->dma_bytes) {
1985 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
1986 if (err < 0)
1987 return -EINVAL;
1988 }
1989
1990 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
1991 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1992 snd_pcm_hw_rule_rate, hw,
1993 SNDRV_PCM_HW_PARAM_RATE, -1);
1994 if (err < 0)
1995 return err;
1996 }
1997
1998 /* FIXME: this belong to lowlevel */
1999 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
2000
2001 return 0;
2002 }
2003
2004 static void pcm_release_private(struct snd_pcm_substream *substream)
2005 {
2006 snd_pcm_unlink(substream);
2007 }
2008
2009 void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2010 {
2011 substream->ref_count--;
2012 if (substream->ref_count > 0)
2013 return;
2014
2015 snd_pcm_drop(substream);
2016 if (substream->hw_opened) {
2017 if (substream->ops->hw_free != NULL)
2018 substream->ops->hw_free(substream);
2019 substream->ops->close(substream);
2020 substream->hw_opened = 0;
2021 }
2022 if (pm_qos_request_active(&substream->latency_pm_qos_req))
2023 pm_qos_remove_request(&substream->latency_pm_qos_req);
2024 if (substream->pcm_release) {
2025 substream->pcm_release(substream);
2026 substream->pcm_release = NULL;
2027 }
2028 snd_pcm_detach_substream(substream);
2029 }
2030
2031 EXPORT_SYMBOL(snd_pcm_release_substream);
2032
2033 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2034 struct file *file,
2035 struct snd_pcm_substream **rsubstream)
2036 {
2037 struct snd_pcm_substream *substream;
2038 int err;
2039
2040 err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2041 if (err < 0)
2042 return err;
2043 if (substream->ref_count > 1) {
2044 *rsubstream = substream;
2045 return 0;
2046 }
2047
2048 err = snd_pcm_hw_constraints_init(substream);
2049 if (err < 0) {
2050 snd_printd("snd_pcm_hw_constraints_init failed\n");
2051 goto error;
2052 }
2053
2054 if ((err = substream->ops->open(substream)) < 0)
2055 goto error;
2056
2057 substream->hw_opened = 1;
2058
2059 err = snd_pcm_hw_constraints_complete(substream);
2060 if (err < 0) {
2061 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2062 goto error;
2063 }
2064
2065 *rsubstream = substream;
2066 return 0;
2067
2068 error:
2069 snd_pcm_release_substream(substream);
2070 return err;
2071 }
2072
2073 EXPORT_SYMBOL(snd_pcm_open_substream);
2074
2075 static int snd_pcm_open_file(struct file *file,
2076 struct snd_pcm *pcm,
2077 int stream)
2078 {
2079 struct snd_pcm_file *pcm_file;
2080 struct snd_pcm_substream *substream;
2081 int err;
2082
2083 err = snd_pcm_open_substream(pcm, stream, file, &substream);
2084 if (err < 0)
2085 return err;
2086
2087 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2088 if (pcm_file == NULL) {
2089 snd_pcm_release_substream(substream);
2090 return -ENOMEM;
2091 }
2092 pcm_file->substream = substream;
2093 if (substream->ref_count == 1) {
2094 substream->file = pcm_file;
2095 substream->pcm_release = pcm_release_private;
2096 }
2097 file->private_data = pcm_file;
2098
2099 return 0;
2100 }
2101
2102 static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2103 {
2104 struct snd_pcm *pcm;
2105 int err = nonseekable_open(inode, file);
2106 if (err < 0)
2107 return err;
2108 pcm = snd_lookup_minor_data(iminor(inode),
2109 SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2110 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2111 }
2112
2113 static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2114 {
2115 struct snd_pcm *pcm;
2116 int err = nonseekable_open(inode, file);
2117 if (err < 0)
2118 return err;
2119 pcm = snd_lookup_minor_data(iminor(inode),
2120 SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2121 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2122 }
2123
2124 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2125 {
2126 int err;
2127 wait_queue_t wait;
2128
2129 if (pcm == NULL) {
2130 err = -ENODEV;
2131 goto __error1;
2132 }
2133 err = snd_card_file_add(pcm->card, file);
2134 if (err < 0)
2135 goto __error1;
2136 if (!try_module_get(pcm->card->module)) {
2137 err = -EFAULT;
2138 goto __error2;
2139 }
2140 init_waitqueue_entry(&wait, current);
2141 add_wait_queue(&pcm->open_wait, &wait);
2142 mutex_lock(&pcm->open_mutex);
2143 while (1) {
2144 err = snd_pcm_open_file(file, pcm, stream);
2145 if (err >= 0)
2146 break;
2147 if (err == -EAGAIN) {
2148 if (file->f_flags & O_NONBLOCK) {
2149 err = -EBUSY;
2150 break;
2151 }
2152 } else
2153 break;
2154 set_current_state(TASK_INTERRUPTIBLE);
2155 mutex_unlock(&pcm->open_mutex);
2156 schedule();
2157 mutex_lock(&pcm->open_mutex);
2158 if (signal_pending(current)) {
2159 err = -ERESTARTSYS;
2160 break;
2161 }
2162 }
2163 remove_wait_queue(&pcm->open_wait, &wait);
2164 mutex_unlock(&pcm->open_mutex);
2165 if (err < 0)
2166 goto __error;
2167 return err;
2168
2169 __error:
2170 module_put(pcm->card->module);
2171 __error2:
2172 snd_card_file_remove(pcm->card, file);
2173 __error1:
2174 return err;
2175 }
2176
2177 static int snd_pcm_release(struct inode *inode, struct file *file)
2178 {
2179 struct snd_pcm *pcm;
2180 struct snd_pcm_substream *substream;
2181 struct snd_pcm_file *pcm_file;
2182
2183 pcm_file = file->private_data;
2184 substream = pcm_file->substream;
2185 if (snd_BUG_ON(!substream))
2186 return -ENXIO;
2187 pcm = substream->pcm;
2188 mutex_lock(&pcm->open_mutex);
2189 snd_pcm_release_substream(substream);
2190 kfree(pcm_file);
2191 mutex_unlock(&pcm->open_mutex);
2192 wake_up(&pcm->open_wait);
2193 module_put(pcm->card->module);
2194 snd_card_file_remove(pcm->card, file);
2195 return 0;
2196 }
2197
2198 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2199 snd_pcm_uframes_t frames)
2200 {
2201 struct snd_pcm_runtime *runtime = substream->runtime;
2202 snd_pcm_sframes_t appl_ptr;
2203 snd_pcm_sframes_t ret;
2204 snd_pcm_sframes_t hw_avail;
2205
2206 if (frames == 0)
2207 return 0;
2208
2209 snd_pcm_stream_lock_irq(substream);
2210 switch (runtime->status->state) {
2211 case SNDRV_PCM_STATE_PREPARED:
2212 break;
2213 case SNDRV_PCM_STATE_DRAINING:
2214 case SNDRV_PCM_STATE_RUNNING:
2215 if (snd_pcm_update_hw_ptr(substream) >= 0)
2216 break;
2217 /* Fall through */
2218 case SNDRV_PCM_STATE_XRUN:
2219 ret = -EPIPE;
2220 goto __end;
2221 case SNDRV_PCM_STATE_SUSPENDED:
2222 ret = -ESTRPIPE;
2223 goto __end;
2224 default:
2225 ret = -EBADFD;
2226 goto __end;
2227 }
2228
2229 hw_avail = snd_pcm_playback_hw_avail(runtime);
2230 if (hw_avail <= 0) {
2231 ret = 0;
2232 goto __end;
2233 }
2234 if (frames > (snd_pcm_uframes_t)hw_avail)
2235 frames = hw_avail;
2236 appl_ptr = runtime->control->appl_ptr - frames;
2237 if (appl_ptr < 0)
2238 appl_ptr += runtime->boundary;
2239 runtime->control->appl_ptr = appl_ptr;
2240 ret = frames;
2241 __end:
2242 snd_pcm_stream_unlock_irq(substream);
2243 return ret;
2244 }
2245
2246 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2247 snd_pcm_uframes_t frames)
2248 {
2249 struct snd_pcm_runtime *runtime = substream->runtime;
2250 snd_pcm_sframes_t appl_ptr;
2251 snd_pcm_sframes_t ret;
2252 snd_pcm_sframes_t hw_avail;
2253
2254 if (frames == 0)
2255 return 0;
2256
2257 snd_pcm_stream_lock_irq(substream);
2258 switch (runtime->status->state) {
2259 case SNDRV_PCM_STATE_PREPARED:
2260 case SNDRV_PCM_STATE_DRAINING:
2261 break;
2262 case SNDRV_PCM_STATE_RUNNING:
2263 if (snd_pcm_update_hw_ptr(substream) >= 0)
2264 break;
2265 /* Fall through */
2266 case SNDRV_PCM_STATE_XRUN:
2267 ret = -EPIPE;
2268 goto __end;
2269 case SNDRV_PCM_STATE_SUSPENDED:
2270 ret = -ESTRPIPE;
2271 goto __end;
2272 default:
2273 ret = -EBADFD;
2274 goto __end;
2275 }
2276
2277 hw_avail = snd_pcm_capture_hw_avail(runtime);
2278 if (hw_avail <= 0) {
2279 ret = 0;
2280 goto __end;
2281 }
2282 if (frames > (snd_pcm_uframes_t)hw_avail)
2283 frames = hw_avail;
2284 appl_ptr = runtime->control->appl_ptr - frames;
2285 if (appl_ptr < 0)
2286 appl_ptr += runtime->boundary;
2287 runtime->control->appl_ptr = appl_ptr;
2288 ret = frames;
2289 __end:
2290 snd_pcm_stream_unlock_irq(substream);
2291 return ret;
2292 }
2293
2294 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2295 snd_pcm_uframes_t frames)
2296 {
2297 struct snd_pcm_runtime *runtime = substream->runtime;
2298 snd_pcm_sframes_t appl_ptr;
2299 snd_pcm_sframes_t ret;
2300 snd_pcm_sframes_t avail;
2301
2302 if (frames == 0)
2303 return 0;
2304
2305 snd_pcm_stream_lock_irq(substream);
2306 switch (runtime->status->state) {
2307 case SNDRV_PCM_STATE_PREPARED:
2308 case SNDRV_PCM_STATE_PAUSED:
2309 break;
2310 case SNDRV_PCM_STATE_DRAINING:
2311 case SNDRV_PCM_STATE_RUNNING:
2312 if (snd_pcm_update_hw_ptr(substream) >= 0)
2313 break;
2314 /* Fall through */
2315 case SNDRV_PCM_STATE_XRUN:
2316 ret = -EPIPE;
2317 goto __end;
2318 case SNDRV_PCM_STATE_SUSPENDED:
2319 ret = -ESTRPIPE;
2320 goto __end;
2321 default:
2322 ret = -EBADFD;
2323 goto __end;
2324 }
2325
2326 avail = snd_pcm_playback_avail(runtime);
2327 if (avail <= 0) {
2328 ret = 0;
2329 goto __end;
2330 }
2331 if (frames > (snd_pcm_uframes_t)avail)
2332 frames = avail;
2333 appl_ptr = runtime->control->appl_ptr + frames;
2334 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2335 appl_ptr -= runtime->boundary;
2336 runtime->control->appl_ptr = appl_ptr;
2337 ret = frames;
2338 __end:
2339 snd_pcm_stream_unlock_irq(substream);
2340 return ret;
2341 }
2342
2343 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2344 snd_pcm_uframes_t frames)
2345 {
2346 struct snd_pcm_runtime *runtime = substream->runtime;
2347 snd_pcm_sframes_t appl_ptr;
2348 snd_pcm_sframes_t ret;
2349 snd_pcm_sframes_t avail;
2350
2351 if (frames == 0)
2352 return 0;
2353
2354 snd_pcm_stream_lock_irq(substream);
2355 switch (runtime->status->state) {
2356 case SNDRV_PCM_STATE_PREPARED:
2357 case SNDRV_PCM_STATE_DRAINING:
2358 case SNDRV_PCM_STATE_PAUSED:
2359 break;
2360 case SNDRV_PCM_STATE_RUNNING:
2361 if (snd_pcm_update_hw_ptr(substream) >= 0)
2362 break;
2363 /* Fall through */
2364 case SNDRV_PCM_STATE_XRUN:
2365 ret = -EPIPE;
2366 goto __end;
2367 case SNDRV_PCM_STATE_SUSPENDED:
2368 ret = -ESTRPIPE;
2369 goto __end;
2370 default:
2371 ret = -EBADFD;
2372 goto __end;
2373 }
2374
2375 avail = snd_pcm_capture_avail(runtime);
2376 if (avail <= 0) {
2377 ret = 0;
2378 goto __end;
2379 }
2380 if (frames > (snd_pcm_uframes_t)avail)
2381 frames = avail;
2382 appl_ptr = runtime->control->appl_ptr + frames;
2383 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2384 appl_ptr -= runtime->boundary;
2385 runtime->control->appl_ptr = appl_ptr;
2386 ret = frames;
2387 __end:
2388 snd_pcm_stream_unlock_irq(substream);
2389 return ret;
2390 }
2391
2392 static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2393 {
2394 struct snd_pcm_runtime *runtime = substream->runtime;
2395 int err;
2396
2397 snd_pcm_stream_lock_irq(substream);
2398 switch (runtime->status->state) {
2399 case SNDRV_PCM_STATE_DRAINING:
2400 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2401 goto __badfd;
2402 case SNDRV_PCM_STATE_RUNNING:
2403 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2404 break;
2405 /* Fall through */
2406 case SNDRV_PCM_STATE_PREPARED:
2407 case SNDRV_PCM_STATE_SUSPENDED:
2408 err = 0;
2409 break;
2410 case SNDRV_PCM_STATE_XRUN:
2411 err = -EPIPE;
2412 break;
2413 default:
2414 __badfd:
2415 err = -EBADFD;
2416 break;
2417 }
2418 snd_pcm_stream_unlock_irq(substream);
2419 return err;
2420 }
2421
2422 static int snd_pcm_delay(struct snd_pcm_substream *substream,
2423 snd_pcm_sframes_t __user *res)
2424 {
2425 struct snd_pcm_runtime *runtime = substream->runtime;
2426 int err;
2427 snd_pcm_sframes_t n = 0;
2428
2429 snd_pcm_stream_lock_irq(substream);
2430 switch (runtime->status->state) {
2431 case SNDRV_PCM_STATE_DRAINING:
2432 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2433 goto __badfd;
2434 case SNDRV_PCM_STATE_RUNNING:
2435 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2436 break;
2437 /* Fall through */
2438 case SNDRV_PCM_STATE_PREPARED:
2439 case SNDRV_PCM_STATE_SUSPENDED:
2440 err = 0;
2441 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2442 n = snd_pcm_playback_hw_avail(runtime);
2443 else
2444 n = snd_pcm_capture_avail(runtime);
2445 n += runtime->delay;
2446 break;
2447 case SNDRV_PCM_STATE_XRUN:
2448 err = -EPIPE;
2449 break;
2450 default:
2451 __badfd:
2452 err = -EBADFD;
2453 break;
2454 }
2455 snd_pcm_stream_unlock_irq(substream);
2456 if (!err)
2457 if (put_user(n, res))
2458 err = -EFAULT;
2459 return err;
2460 }
2461
2462 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2463 struct snd_pcm_sync_ptr __user *_sync_ptr)
2464 {
2465 struct snd_pcm_runtime *runtime = substream->runtime;
2466 struct snd_pcm_sync_ptr sync_ptr;
2467 volatile struct snd_pcm_mmap_status *status;
2468 volatile struct snd_pcm_mmap_control *control;
2469 int err;
2470
2471 memset(&sync_ptr, 0, sizeof(sync_ptr));
2472 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2473 return -EFAULT;
2474 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2475 return -EFAULT;
2476 status = runtime->status;
2477 control = runtime->control;
2478 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2479 err = snd_pcm_hwsync(substream);
2480 if (err < 0)
2481 return err;
2482 }
2483 snd_pcm_stream_lock_irq(substream);
2484 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2485 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2486 else
2487 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2488 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2489 control->avail_min = sync_ptr.c.control.avail_min;
2490 else
2491 sync_ptr.c.control.avail_min = control->avail_min;
2492 sync_ptr.s.status.state = status->state;
2493 sync_ptr.s.status.hw_ptr = status->hw_ptr;
2494 sync_ptr.s.status.tstamp = status->tstamp;
2495 sync_ptr.s.status.suspended_state = status->suspended_state;
2496 snd_pcm_stream_unlock_irq(substream);
2497 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2498 return -EFAULT;
2499 return 0;
2500 }
2501
2502 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2503 {
2504 struct snd_pcm_runtime *runtime = substream->runtime;
2505 int arg;
2506
2507 if (get_user(arg, _arg))
2508 return -EFAULT;
2509 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2510 return -EINVAL;
2511 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY;
2512 if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
2513 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC;
2514 return 0;
2515 }
2516
2517 static int snd_pcm_common_ioctl1(struct file *file,
2518 struct snd_pcm_substream *substream,
2519 unsigned int cmd, void __user *arg)
2520 {
2521 switch (cmd) {
2522 case SNDRV_PCM_IOCTL_PVERSION:
2523 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2524 case SNDRV_PCM_IOCTL_INFO:
2525 return snd_pcm_info_user(substream, arg);
2526 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
2527 return 0;
2528 case SNDRV_PCM_IOCTL_TTSTAMP:
2529 return snd_pcm_tstamp(substream, arg);
2530 case SNDRV_PCM_IOCTL_HW_REFINE:
2531 return snd_pcm_hw_refine_user(substream, arg);
2532 case SNDRV_PCM_IOCTL_HW_PARAMS:
2533 return snd_pcm_hw_params_user(substream, arg);
2534 case SNDRV_PCM_IOCTL_HW_FREE:
2535 return snd_pcm_hw_free(substream);
2536 case SNDRV_PCM_IOCTL_SW_PARAMS:
2537 return snd_pcm_sw_params_user(substream, arg);
2538 case SNDRV_PCM_IOCTL_STATUS:
2539 return snd_pcm_status_user(substream, arg);
2540 case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2541 return snd_pcm_channel_info_user(substream, arg);
2542 case SNDRV_PCM_IOCTL_PREPARE:
2543 return snd_pcm_prepare(substream, file);
2544 case SNDRV_PCM_IOCTL_RESET:
2545 return snd_pcm_reset(substream);
2546 case SNDRV_PCM_IOCTL_START:
2547 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2548 case SNDRV_PCM_IOCTL_LINK:
2549 return snd_pcm_link(substream, (int)(unsigned long) arg);
2550 case SNDRV_PCM_IOCTL_UNLINK:
2551 return snd_pcm_unlink(substream);
2552 case SNDRV_PCM_IOCTL_RESUME:
2553 return snd_pcm_resume(substream);
2554 case SNDRV_PCM_IOCTL_XRUN:
2555 return snd_pcm_xrun(substream);
2556 case SNDRV_PCM_IOCTL_HWSYNC:
2557 return snd_pcm_hwsync(substream);
2558 case SNDRV_PCM_IOCTL_DELAY:
2559 return snd_pcm_delay(substream, arg);
2560 case SNDRV_PCM_IOCTL_SYNC_PTR:
2561 return snd_pcm_sync_ptr(substream, arg);
2562 #ifdef CONFIG_SND_SUPPORT_OLD_API
2563 case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2564 return snd_pcm_hw_refine_old_user(substream, arg);
2565 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2566 return snd_pcm_hw_params_old_user(substream, arg);
2567 #endif
2568 case SNDRV_PCM_IOCTL_DRAIN:
2569 return snd_pcm_drain(substream, file);
2570 case SNDRV_PCM_IOCTL_DROP:
2571 return snd_pcm_drop(substream);
2572 case SNDRV_PCM_IOCTL_PAUSE:
2573 {
2574 int res;
2575 snd_pcm_stream_lock_irq(substream);
2576 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2577 snd_pcm_stream_unlock_irq(substream);
2578 return res;
2579 }
2580 }
2581 snd_printd("unknown ioctl = 0x%x\n", cmd);
2582 return -ENOTTY;
2583 }
2584
2585 static int snd_pcm_playback_ioctl1(struct file *file,
2586 struct snd_pcm_substream *substream,
2587 unsigned int cmd, void __user *arg)
2588 {
2589 if (snd_BUG_ON(!substream))
2590 return -ENXIO;
2591 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2592 return -EINVAL;
2593 switch (cmd) {
2594 case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2595 {
2596 struct snd_xferi xferi;
2597 struct snd_xferi __user *_xferi = arg;
2598 struct snd_pcm_runtime *runtime = substream->runtime;
2599 snd_pcm_sframes_t result;
2600 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2601 return -EBADFD;
2602 if (put_user(0, &_xferi->result))
2603 return -EFAULT;
2604 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2605 return -EFAULT;
2606 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2607 __put_user(result, &_xferi->result);
2608 return result < 0 ? result : 0;
2609 }
2610 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2611 {
2612 struct snd_xfern xfern;
2613 struct snd_xfern __user *_xfern = arg;
2614 struct snd_pcm_runtime *runtime = substream->runtime;
2615 void __user **bufs;
2616 snd_pcm_sframes_t result;
2617 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2618 return -EBADFD;
2619 if (runtime->channels > 128)
2620 return -EINVAL;
2621 if (put_user(0, &_xfern->result))
2622 return -EFAULT;
2623 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2624 return -EFAULT;
2625
2626 bufs = memdup_user(xfern.bufs,
2627 sizeof(void *) * runtime->channels);
2628 if (IS_ERR(bufs))
2629 return PTR_ERR(bufs);
2630 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2631 kfree(bufs);
2632 __put_user(result, &_xfern->result);
2633 return result < 0 ? result : 0;
2634 }
2635 case SNDRV_PCM_IOCTL_REWIND:
2636 {
2637 snd_pcm_uframes_t frames;
2638 snd_pcm_uframes_t __user *_frames = arg;
2639 snd_pcm_sframes_t result;
2640 if (get_user(frames, _frames))
2641 return -EFAULT;
2642 if (put_user(0, _frames))
2643 return -EFAULT;
2644 result = snd_pcm_playback_rewind(substream, frames);
2645 __put_user(result, _frames);
2646 return result < 0 ? result : 0;
2647 }
2648 case SNDRV_PCM_IOCTL_FORWARD:
2649 {
2650 snd_pcm_uframes_t frames;
2651 snd_pcm_uframes_t __user *_frames = arg;
2652 snd_pcm_sframes_t result;
2653 if (get_user(frames, _frames))
2654 return -EFAULT;
2655 if (put_user(0, _frames))
2656 return -EFAULT;
2657 result = snd_pcm_playback_forward(substream, frames);
2658 __put_user(result, _frames);
2659 return result < 0 ? result : 0;
2660 }
2661 }
2662 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2663 }
2664
2665 static int snd_pcm_capture_ioctl1(struct file *file,
2666 struct snd_pcm_substream *substream,
2667 unsigned int cmd, void __user *arg)
2668 {
2669 if (snd_BUG_ON(!substream))
2670 return -ENXIO;
2671 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2672 return -EINVAL;
2673 switch (cmd) {
2674 case SNDRV_PCM_IOCTL_READI_FRAMES:
2675 {
2676 struct snd_xferi xferi;
2677 struct snd_xferi __user *_xferi = arg;
2678 struct snd_pcm_runtime *runtime = substream->runtime;
2679 snd_pcm_sframes_t result;
2680 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2681 return -EBADFD;
2682 if (put_user(0, &_xferi->result))
2683 return -EFAULT;
2684 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2685 return -EFAULT;
2686 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2687 __put_user(result, &_xferi->result);
2688 return result < 0 ? result : 0;
2689 }
2690 case SNDRV_PCM_IOCTL_READN_FRAMES:
2691 {
2692 struct snd_xfern xfern;
2693 struct snd_xfern __user *_xfern = arg;
2694 struct snd_pcm_runtime *runtime = substream->runtime;
2695 void *bufs;
2696 snd_pcm_sframes_t result;
2697 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2698 return -EBADFD;
2699 if (runtime->channels > 128)
2700 return -EINVAL;
2701 if (put_user(0, &_xfern->result))
2702 return -EFAULT;
2703 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2704 return -EFAULT;
2705
2706 bufs = memdup_user(xfern.bufs,
2707 sizeof(void *) * runtime->channels);
2708 if (IS_ERR(bufs))
2709 return PTR_ERR(bufs);
2710 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2711 kfree(bufs);
2712 __put_user(result, &_xfern->result);
2713 return result < 0 ? result : 0;
2714 }
2715 case SNDRV_PCM_IOCTL_REWIND:
2716 {
2717 snd_pcm_uframes_t frames;
2718 snd_pcm_uframes_t __user *_frames = arg;
2719 snd_pcm_sframes_t result;
2720 if (get_user(frames, _frames))
2721 return -EFAULT;
2722 if (put_user(0, _frames))
2723 return -EFAULT;
2724 result = snd_pcm_capture_rewind(substream, frames);
2725 __put_user(result, _frames);
2726 return result < 0 ? result : 0;
2727 }
2728 case SNDRV_PCM_IOCTL_FORWARD:
2729 {
2730 snd_pcm_uframes_t frames;
2731 snd_pcm_uframes_t __user *_frames = arg;
2732 snd_pcm_sframes_t result;
2733 if (get_user(frames, _frames))
2734 return -EFAULT;
2735 if (put_user(0, _frames))
2736 return -EFAULT;
2737 result = snd_pcm_capture_forward(substream, frames);
2738 __put_user(result, _frames);
2739 return result < 0 ? result : 0;
2740 }
2741 }
2742 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2743 }
2744
2745 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2746 unsigned long arg)
2747 {
2748 struct snd_pcm_file *pcm_file;
2749
2750 pcm_file = file->private_data;
2751
2752 if (((cmd >> 8) & 0xff) != 'A')
2753 return -ENOTTY;
2754
2755 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2756 (void __user *)arg);
2757 }
2758
2759 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2760 unsigned long arg)
2761 {
2762 struct snd_pcm_file *pcm_file;
2763
2764 pcm_file = file->private_data;
2765
2766 if (((cmd >> 8) & 0xff) != 'A')
2767 return -ENOTTY;
2768
2769 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2770 (void __user *)arg);
2771 }
2772
2773 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2774 unsigned int cmd, void *arg)
2775 {
2776 mm_segment_t fs;
2777 int result;
2778
2779 fs = snd_enter_user();
2780 switch (substream->stream) {
2781 case SNDRV_PCM_STREAM_PLAYBACK:
2782 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2783 (void __user *)arg);
2784 break;
2785 case SNDRV_PCM_STREAM_CAPTURE:
2786 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2787 (void __user *)arg);
2788 break;
2789 default:
2790 result = -EINVAL;
2791 break;
2792 }
2793 snd_leave_user(fs);
2794 return result;
2795 }
2796
2797 EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2798
2799 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2800 loff_t * offset)
2801 {
2802 struct snd_pcm_file *pcm_file;
2803 struct snd_pcm_substream *substream;
2804 struct snd_pcm_runtime *runtime;
2805 snd_pcm_sframes_t result;
2806
2807 pcm_file = file->private_data;
2808 substream = pcm_file->substream;
2809 if (PCM_RUNTIME_CHECK(substream))
2810 return -ENXIO;
2811 runtime = substream->runtime;
2812 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2813 return -EBADFD;
2814 if (!frame_aligned(runtime, count))
2815 return -EINVAL;
2816 count = bytes_to_frames(runtime, count);
2817 result = snd_pcm_lib_read(substream, buf, count);
2818 if (result > 0)
2819 result = frames_to_bytes(runtime, result);
2820 return result;
2821 }
2822
2823 static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2824 size_t count, loff_t * offset)
2825 {
2826 struct snd_pcm_file *pcm_file;
2827 struct snd_pcm_substream *substream;
2828 struct snd_pcm_runtime *runtime;
2829 snd_pcm_sframes_t result;
2830
2831 pcm_file = file->private_data;
2832 substream = pcm_file->substream;
2833 if (PCM_RUNTIME_CHECK(substream))
2834 return -ENXIO;
2835 runtime = substream->runtime;
2836 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2837 return -EBADFD;
2838 if (!frame_aligned(runtime, count))
2839 return -EINVAL;
2840 count = bytes_to_frames(runtime, count);
2841 result = snd_pcm_lib_write(substream, buf, count);
2842 if (result > 0)
2843 result = frames_to_bytes(runtime, result);
2844 return result;
2845 }
2846
2847 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
2848 unsigned long nr_segs, loff_t pos)
2849
2850 {
2851 struct snd_pcm_file *pcm_file;
2852 struct snd_pcm_substream *substream;
2853 struct snd_pcm_runtime *runtime;
2854 snd_pcm_sframes_t result;
2855 unsigned long i;
2856 void __user **bufs;
2857 snd_pcm_uframes_t frames;
2858
2859 pcm_file = iocb->ki_filp->private_data;
2860 substream = pcm_file->substream;
2861 if (PCM_RUNTIME_CHECK(substream))
2862 return -ENXIO;
2863 runtime = substream->runtime;
2864 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2865 return -EBADFD;
2866 if (nr_segs > 1024 || nr_segs != runtime->channels)
2867 return -EINVAL;
2868 if (!frame_aligned(runtime, iov->iov_len))
2869 return -EINVAL;
2870 frames = bytes_to_samples(runtime, iov->iov_len);
2871 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2872 if (bufs == NULL)
2873 return -ENOMEM;
2874 for (i = 0; i < nr_segs; ++i)
2875 bufs[i] = iov[i].iov_base;
2876 result = snd_pcm_lib_readv(substream, bufs, frames);
2877 if (result > 0)
2878 result = frames_to_bytes(runtime, result);
2879 kfree(bufs);
2880 return result;
2881 }
2882
2883 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
2884 unsigned long nr_segs, loff_t pos)
2885 {
2886 struct snd_pcm_file *pcm_file;
2887 struct snd_pcm_substream *substream;
2888 struct snd_pcm_runtime *runtime;
2889 snd_pcm_sframes_t result;
2890 unsigned long i;
2891 void __user **bufs;
2892 snd_pcm_uframes_t frames;
2893
2894 pcm_file = iocb->ki_filp->private_data;
2895 substream = pcm_file->substream;
2896 if (PCM_RUNTIME_CHECK(substream))
2897 return -ENXIO;
2898 runtime = substream->runtime;
2899 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2900 return -EBADFD;
2901 if (nr_segs > 128 || nr_segs != runtime->channels ||
2902 !frame_aligned(runtime, iov->iov_len))
2903 return -EINVAL;
2904 frames = bytes_to_samples(runtime, iov->iov_len);
2905 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2906 if (bufs == NULL)
2907 return -ENOMEM;
2908 for (i = 0; i < nr_segs; ++i)
2909 bufs[i] = iov[i].iov_base;
2910 result = snd_pcm_lib_writev(substream, bufs, frames);
2911 if (result > 0)
2912 result = frames_to_bytes(runtime, result);
2913 kfree(bufs);
2914 return result;
2915 }
2916
2917 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2918 {
2919 struct snd_pcm_file *pcm_file;
2920 struct snd_pcm_substream *substream;
2921 struct snd_pcm_runtime *runtime;
2922 unsigned int mask;
2923 snd_pcm_uframes_t avail;
2924
2925 pcm_file = file->private_data;
2926
2927 substream = pcm_file->substream;
2928 if (PCM_RUNTIME_CHECK(substream))
2929 return -ENXIO;
2930 runtime = substream->runtime;
2931
2932 poll_wait(file, &runtime->sleep, wait);
2933
2934 snd_pcm_stream_lock_irq(substream);
2935 avail = snd_pcm_playback_avail(runtime);
2936 switch (runtime->status->state) {
2937 case SNDRV_PCM_STATE_RUNNING:
2938 case SNDRV_PCM_STATE_PREPARED:
2939 case SNDRV_PCM_STATE_PAUSED:
2940 if (avail >= runtime->control->avail_min) {
2941 mask = POLLOUT | POLLWRNORM;
2942 break;
2943 }
2944 /* Fall through */
2945 case SNDRV_PCM_STATE_DRAINING:
2946 mask = 0;
2947 break;
2948 default:
2949 mask = POLLOUT | POLLWRNORM | POLLERR;
2950 break;
2951 }
2952 snd_pcm_stream_unlock_irq(substream);
2953 return mask;
2954 }
2955
2956 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2957 {
2958 struct snd_pcm_file *pcm_file;
2959 struct snd_pcm_substream *substream;
2960 struct snd_pcm_runtime *runtime;
2961 unsigned int mask;
2962 snd_pcm_uframes_t avail;
2963
2964 pcm_file = file->private_data;
2965
2966 substream = pcm_file->substream;
2967 if (PCM_RUNTIME_CHECK(substream))
2968 return -ENXIO;
2969 runtime = substream->runtime;
2970
2971 poll_wait(file, &runtime->sleep, wait);
2972
2973 snd_pcm_stream_lock_irq(substream);
2974 avail = snd_pcm_capture_avail(runtime);
2975 switch (runtime->status->state) {
2976 case SNDRV_PCM_STATE_RUNNING:
2977 case SNDRV_PCM_STATE_PREPARED:
2978 case SNDRV_PCM_STATE_PAUSED:
2979 if (avail >= runtime->control->avail_min) {
2980 mask = POLLIN | POLLRDNORM;
2981 break;
2982 }
2983 mask = 0;
2984 break;
2985 case SNDRV_PCM_STATE_DRAINING:
2986 if (avail > 0) {
2987 mask = POLLIN | POLLRDNORM;
2988 break;
2989 }
2990 /* Fall through */
2991 default:
2992 mask = POLLIN | POLLRDNORM | POLLERR;
2993 break;
2994 }
2995 snd_pcm_stream_unlock_irq(substream);
2996 return mask;
2997 }
2998
2999 /*
3000 * mmap support
3001 */
3002
3003 /*
3004 * Only on coherent architectures, we can mmap the status and the control records
3005 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
3006 */
3007 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3008 /*
3009 * mmap status record
3010 */
3011 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
3012 struct vm_fault *vmf)
3013 {
3014 struct snd_pcm_substream *substream = area->vm_private_data;
3015 struct snd_pcm_runtime *runtime;
3016
3017 if (substream == NULL)
3018 return VM_FAULT_SIGBUS;
3019 runtime = substream->runtime;
3020 vmf->page = virt_to_page(runtime->status);
3021 get_page(vmf->page);
3022 return 0;
3023 }
3024
3025 static const struct vm_operations_struct snd_pcm_vm_ops_status =
3026 {
3027 .fault = snd_pcm_mmap_status_fault,
3028 };
3029
3030 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3031 struct vm_area_struct *area)
3032 {
3033 long size;
3034 if (!(area->vm_flags & VM_READ))
3035 return -EINVAL;
3036 size = area->vm_end - area->vm_start;
3037 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3038 return -EINVAL;
3039 area->vm_ops = &snd_pcm_vm_ops_status;
3040 area->vm_private_data = substream;
3041 area->vm_flags |= VM_RESERVED;
3042 return 0;
3043 }
3044
3045 /*
3046 * mmap control record
3047 */
3048 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3049 struct vm_fault *vmf)
3050 {
3051 struct snd_pcm_substream *substream = area->vm_private_data;
3052 struct snd_pcm_runtime *runtime;
3053
3054 if (substream == NULL)
3055 return VM_FAULT_SIGBUS;
3056 runtime = substream->runtime;
3057 vmf->page = virt_to_page(runtime->control);
3058 get_page(vmf->page);
3059 return 0;
3060 }
3061
3062 static const struct vm_operations_struct snd_pcm_vm_ops_control =
3063 {
3064 .fault = snd_pcm_mmap_control_fault,
3065 };
3066
3067 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3068 struct vm_area_struct *area)
3069 {
3070 long size;
3071 if (!(area->vm_flags & VM_READ))
3072 return -EINVAL;
3073 size = area->vm_end - area->vm_start;
3074 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3075 return -EINVAL;
3076 area->vm_ops = &snd_pcm_vm_ops_control;
3077 area->vm_private_data = substream;
3078 area->vm_flags |= VM_RESERVED;
3079 return 0;
3080 }
3081 #else /* ! coherent mmap */
3082 /*
3083 * don't support mmap for status and control records.
3084 */
3085 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3086 struct vm_area_struct *area)
3087 {
3088 return -ENXIO;
3089 }
3090 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3091 struct vm_area_struct *area)
3092 {
3093 return -ENXIO;
3094 }
3095 #endif /* coherent mmap */
3096
3097 static inline struct page *
3098 snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3099 {
3100 void *vaddr = substream->runtime->dma_area + ofs;
3101 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3102 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3103 return virt_to_page(CAC_ADDR(vaddr));
3104 #endif
3105 #if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE)
3106 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) {
3107 dma_addr_t addr = substream->runtime->dma_addr + ofs;
3108 addr -= get_dma_offset(substream->dma_buffer.dev.dev);
3109 /* assume dma_handle set via pfn_to_phys() in
3110 * mm/dma-noncoherent.c
3111 */
3112 return pfn_to_page(addr >> PAGE_SHIFT);
3113 }
3114 #endif
3115 return virt_to_page(vaddr);
3116 }
3117
3118 /*
3119 * fault callback for mmapping a RAM page
3120 */
3121 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3122 struct vm_fault *vmf)
3123 {
3124 struct snd_pcm_substream *substream = area->vm_private_data;
3125 struct snd_pcm_runtime *runtime;
3126 unsigned long offset;
3127 struct page * page;
3128 size_t dma_bytes;
3129
3130 if (substream == NULL)
3131 return VM_FAULT_SIGBUS;
3132 runtime = substream->runtime;
3133 offset = vmf->pgoff << PAGE_SHIFT;
3134 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3135 if (offset > dma_bytes - PAGE_SIZE)
3136 return VM_FAULT_SIGBUS;
3137 if (substream->ops->page)
3138 page = substream->ops->page(substream, offset);
3139 else
3140 page = snd_pcm_default_page_ops(substream, offset);
3141 if (!page)
3142 return VM_FAULT_SIGBUS;
3143 get_page(page);
3144 vmf->page = page;
3145 return 0;
3146 }
3147
3148 static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3149 .open = snd_pcm_mmap_data_open,
3150 .close = snd_pcm_mmap_data_close,
3151 };
3152
3153 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
3154 .open = snd_pcm_mmap_data_open,
3155 .close = snd_pcm_mmap_data_close,
3156 .fault = snd_pcm_mmap_data_fault,
3157 };
3158
3159 #ifndef ARCH_HAS_DMA_MMAP_COHERENT
3160 /* This should be defined / handled globally! */
3161 #ifdef CONFIG_ARM
3162 #define ARCH_HAS_DMA_MMAP_COHERENT
3163 #endif
3164 #endif
3165
3166 /*
3167 * mmap the DMA buffer on RAM
3168 */
3169 int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
3170 struct vm_area_struct *area)
3171 {
3172 area->vm_flags |= VM_RESERVED;
3173 #ifdef ARCH_HAS_DMA_MMAP_COHERENT
3174 if (!substream->ops->page &&
3175 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3176 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3177 area,
3178 substream->runtime->dma_area,
3179 substream->runtime->dma_addr,
3180 area->vm_end - area->vm_start);
3181 #elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3182 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV &&
3183 !plat_device_is_coherent(substream->dma_buffer.dev.dev))
3184 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3185 #endif /* ARCH_HAS_DMA_MMAP_COHERENT */
3186 /* mmap with fault handler */
3187 area->vm_ops = &snd_pcm_vm_ops_data_fault;
3188 return 0;
3189 }
3190 EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap);
3191
3192 /*
3193 * mmap the DMA buffer on I/O memory area
3194 */
3195 #if SNDRV_PCM_INFO_MMAP_IOMEM
3196 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3197 struct vm_area_struct *area)
3198 {
3199 long size;
3200 unsigned long offset;
3201
3202 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3203 area->vm_flags |= VM_IO;
3204 size = area->vm_end - area->vm_start;
3205 offset = area->vm_pgoff << PAGE_SHIFT;
3206 if (io_remap_pfn_range(area, area->vm_start,
3207 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3208 size, area->vm_page_prot))
3209 return -EAGAIN;
3210 return 0;
3211 }
3212
3213 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3214 #endif /* SNDRV_PCM_INFO_MMAP */
3215
3216 /*
3217 * mmap DMA buffer
3218 */
3219 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3220 struct vm_area_struct *area)
3221 {
3222 struct snd_pcm_runtime *runtime;
3223 long size;
3224 unsigned long offset;
3225 size_t dma_bytes;
3226 int err;
3227
3228 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3229 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3230 return -EINVAL;
3231 } else {
3232 if (!(area->vm_flags & VM_READ))
3233 return -EINVAL;
3234 }
3235 runtime = substream->runtime;
3236 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3237 return -EBADFD;
3238 if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3239 return -ENXIO;
3240 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3241 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3242 return -EINVAL;
3243 size = area->vm_end - area->vm_start;
3244 offset = area->vm_pgoff << PAGE_SHIFT;
3245 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3246 if ((size_t)size > dma_bytes)
3247 return -EINVAL;
3248 if (offset > dma_bytes - size)
3249 return -EINVAL;
3250
3251 area->vm_ops = &snd_pcm_vm_ops_data;
3252 area->vm_private_data = substream;
3253 if (substream->ops->mmap)
3254 err = substream->ops->mmap(substream, area);
3255 else
3256 err = snd_pcm_lib_default_mmap(substream, area);
3257 if (!err)
3258 atomic_inc(&substream->mmap_count);
3259 return err;
3260 }
3261
3262 EXPORT_SYMBOL(snd_pcm_mmap_data);
3263
3264 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3265 {
3266 struct snd_pcm_file * pcm_file;
3267 struct snd_pcm_substream *substream;
3268 unsigned long offset;
3269
3270 pcm_file = file->private_data;
3271 substream = pcm_file->substream;
3272 if (PCM_RUNTIME_CHECK(substream))
3273 return -ENXIO;
3274
3275 offset = area->vm_pgoff << PAGE_SHIFT;
3276 switch (offset) {
3277 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3278 if (pcm_file->no_compat_mmap)
3279 return -ENXIO;
3280 return snd_pcm_mmap_status(substream, file, area);
3281 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3282 if (pcm_file->no_compat_mmap)
3283 return -ENXIO;
3284 return snd_pcm_mmap_control(substream, file, area);
3285 default:
3286 return snd_pcm_mmap_data(substream, file, area);
3287 }
3288 return 0;
3289 }
3290
3291 static int snd_pcm_fasync(int fd, struct file * file, int on)
3292 {
3293 struct snd_pcm_file * pcm_file;
3294 struct snd_pcm_substream *substream;
3295 struct snd_pcm_runtime *runtime;
3296
3297 pcm_file = file->private_data;
3298 substream = pcm_file->substream;
3299 if (PCM_RUNTIME_CHECK(substream))
3300 return -ENXIO;
3301 runtime = substream->runtime;
3302 return fasync_helper(fd, file, on, &runtime->fasync);
3303 }
3304
3305 /*
3306 * ioctl32 compat
3307 */
3308 #ifdef CONFIG_COMPAT
3309 #include "pcm_compat.c"
3310 #else
3311 #define snd_pcm_ioctl_compat NULL
3312 #endif
3313
3314 /*
3315 * To be removed helpers to keep binary compatibility
3316 */
3317
3318 #ifdef CONFIG_SND_SUPPORT_OLD_API
3319 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3320 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3321
3322 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3323 struct snd_pcm_hw_params_old *oparams)
3324 {
3325 unsigned int i;
3326
3327 memset(params, 0, sizeof(*params));
3328 params->flags = oparams->flags;
3329 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3330 params->masks[i].bits[0] = oparams->masks[i];
3331 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3332 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3333 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3334 params->info = oparams->info;
3335 params->msbits = oparams->msbits;
3336 params->rate_num = oparams->rate_num;
3337 params->rate_den = oparams->rate_den;
3338 params->fifo_size = oparams->fifo_size;
3339 }
3340
3341 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3342 struct snd_pcm_hw_params *params)
3343 {
3344 unsigned int i;
3345
3346 memset(oparams, 0, sizeof(*oparams));
3347 oparams->flags = params->flags;
3348 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3349 oparams->masks[i] = params->masks[i].bits[0];
3350 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3351 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3352 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3353 oparams->info = params->info;
3354 oparams->msbits = params->msbits;
3355 oparams->rate_num = params->rate_num;
3356 oparams->rate_den = params->rate_den;
3357 oparams->fifo_size = params->fifo_size;
3358 }
3359
3360 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3361 struct snd_pcm_hw_params_old __user * _oparams)
3362 {
3363 struct snd_pcm_hw_params *params;
3364 struct snd_pcm_hw_params_old *oparams = NULL;
3365 int err;
3366
3367 params = kmalloc(sizeof(*params), GFP_KERNEL);
3368 if (!params)
3369 return -ENOMEM;
3370
3371 oparams = memdup_user(_oparams, sizeof(*oparams));
3372 if (IS_ERR(oparams)) {
3373 err = PTR_ERR(oparams);
3374 goto out;
3375 }
3376 snd_pcm_hw_convert_from_old_params(params, oparams);
3377 err = snd_pcm_hw_refine(substream, params);
3378 snd_pcm_hw_convert_to_old_params(oparams, params);
3379 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3380 if (!err)
3381 err = -EFAULT;
3382 }
3383
3384 kfree(oparams);
3385 out:
3386 kfree(params);
3387 return err;
3388 }
3389
3390 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3391 struct snd_pcm_hw_params_old __user * _oparams)
3392 {
3393 struct snd_pcm_hw_params *params;
3394 struct snd_pcm_hw_params_old *oparams = NULL;
3395 int err;
3396
3397 params = kmalloc(sizeof(*params), GFP_KERNEL);
3398 if (!params)
3399 return -ENOMEM;
3400
3401 oparams = memdup_user(_oparams, sizeof(*oparams));
3402 if (IS_ERR(oparams)) {
3403 err = PTR_ERR(oparams);
3404 goto out;
3405 }
3406 snd_pcm_hw_convert_from_old_params(params, oparams);
3407 err = snd_pcm_hw_params(substream, params);
3408 snd_pcm_hw_convert_to_old_params(oparams, params);
3409 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3410 if (!err)
3411 err = -EFAULT;
3412 }
3413
3414 kfree(oparams);
3415 out:
3416 kfree(params);
3417 return err;
3418 }
3419 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3420
3421 #ifndef CONFIG_MMU
3422 static unsigned long snd_pcm_get_unmapped_area(struct file *file,
3423 unsigned long addr,
3424 unsigned long len,
3425 unsigned long pgoff,
3426 unsigned long flags)
3427 {
3428 struct snd_pcm_file *pcm_file = file->private_data;
3429 struct snd_pcm_substream *substream = pcm_file->substream;
3430 struct snd_pcm_runtime *runtime = substream->runtime;
3431 unsigned long offset = pgoff << PAGE_SHIFT;
3432
3433 switch (offset) {
3434 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3435 return (unsigned long)runtime->status;
3436 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3437 return (unsigned long)runtime->control;
3438 default:
3439 return (unsigned long)runtime->dma_area + offset;
3440 }
3441 }
3442 #else
3443 # define snd_pcm_get_unmapped_area NULL
3444 #endif
3445
3446 /*
3447 * Register section
3448 */
3449
3450 const struct file_operations snd_pcm_f_ops[2] = {
3451 {
3452 .owner = THIS_MODULE,
3453 .write = snd_pcm_write,
3454 .aio_write = snd_pcm_aio_write,
3455 .open = snd_pcm_playback_open,
3456 .release = snd_pcm_release,
3457 .llseek = no_llseek,
3458 .poll = snd_pcm_playback_poll,
3459 .unlocked_ioctl = snd_pcm_playback_ioctl,
3460 .compat_ioctl = snd_pcm_ioctl_compat,
3461 .mmap = snd_pcm_mmap,
3462 .fasync = snd_pcm_fasync,
3463 .get_unmapped_area = snd_pcm_get_unmapped_area,
3464 },
3465 {
3466 .owner = THIS_MODULE,
3467 .read = snd_pcm_read,
3468 .aio_read = snd_pcm_aio_read,
3469 .open = snd_pcm_capture_open,
3470 .release = snd_pcm_release,
3471 .llseek = no_llseek,
3472 .poll = snd_pcm_capture_poll,
3473 .unlocked_ioctl = snd_pcm_capture_ioctl,
3474 .compat_ioctl = snd_pcm_ioctl_compat,
3475 .mmap = snd_pcm_mmap,
3476 .fasync = snd_pcm_fasync,
3477 .get_unmapped_area = snd_pcm_get_unmapped_area,
3478 }
3479 };
Linux 2.6 libata-dev (mirror)