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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael...
[GitHub/LineageOS/android_kernel_samsung_universal7580.git] / sound / core / pcm_native.c
1 /*
2 * Digital Audio (PCM) abstract layer
3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
22 #include <linux/mm.h>
23 #include <linux/file.h>
24 #include <linux/slab.h>
25 #include <linux/smp_lock.h>
26 #include <linux/time.h>
27 #include <linux/pm_qos_params.h>
28 #include <linux/uio.h>
29 #include <linux/dma-mapping.h>
30 #include <linux/math64.h>
31 #include <sound/core.h>
32 #include <sound/control.h>
33 #include <sound/info.h>
34 #include <sound/pcm.h>
35 #include <sound/pcm_params.h>
36 #include <sound/timer.h>
37 #include <sound/minors.h>
38 #include <asm/io.h>
39 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
40 #include <dma-coherence.h>
41 #endif
42
43 /*
44 * Compatibility
45 */
46
47 struct snd_pcm_hw_params_old {
48 unsigned int flags;
49 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
50 SNDRV_PCM_HW_PARAM_ACCESS + 1];
51 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
52 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
53 unsigned int rmask;
54 unsigned int cmask;
55 unsigned int info;
56 unsigned int msbits;
57 unsigned int rate_num;
58 unsigned int rate_den;
59 snd_pcm_uframes_t fifo_size;
60 unsigned char reserved[64];
61 };
62
63 #ifdef CONFIG_SND_SUPPORT_OLD_API
64 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
65 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
66
67 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
68 struct snd_pcm_hw_params_old __user * _oparams);
69 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
70 struct snd_pcm_hw_params_old __user * _oparams);
71 #endif
72 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
73
74 /*
75 *
76 */
77
78 DEFINE_RWLOCK(snd_pcm_link_rwlock);
79 EXPORT_SYMBOL(snd_pcm_link_rwlock);
80
81 static DECLARE_RWSEM(snd_pcm_link_rwsem);
82
83 static inline mm_segment_t snd_enter_user(void)
84 {
85 mm_segment_t fs = get_fs();
86 set_fs(get_ds());
87 return fs;
88 }
89
90 static inline void snd_leave_user(mm_segment_t fs)
91 {
92 set_fs(fs);
93 }
94
95
96
97 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
98 {
99 struct snd_pcm_runtime *runtime;
100 struct snd_pcm *pcm = substream->pcm;
101 struct snd_pcm_str *pstr = substream->pstr;
102
103 memset(info, 0, sizeof(*info));
104 info->card = pcm->card->number;
105 info->device = pcm->device;
106 info->stream = substream->stream;
107 info->subdevice = substream->number;
108 strlcpy(info->id, pcm->id, sizeof(info->id));
109 strlcpy(info->name, pcm->name, sizeof(info->name));
110 info->dev_class = pcm->dev_class;
111 info->dev_subclass = pcm->dev_subclass;
112 info->subdevices_count = pstr->substream_count;
113 info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
114 strlcpy(info->subname, substream->name, sizeof(info->subname));
115 runtime = substream->runtime;
116 /* AB: FIXME!!! This is definitely nonsense */
117 if (runtime) {
118 info->sync = runtime->sync;
119 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
120 }
121 return 0;
122 }
123
124 int snd_pcm_info_user(struct snd_pcm_substream *substream,
125 struct snd_pcm_info __user * _info)
126 {
127 struct snd_pcm_info *info;
128 int err;
129
130 info = kmalloc(sizeof(*info), GFP_KERNEL);
131 if (! info)
132 return -ENOMEM;
133 err = snd_pcm_info(substream, info);
134 if (err >= 0) {
135 if (copy_to_user(_info, info, sizeof(*info)))
136 err = -EFAULT;
137 }
138 kfree(info);
139 return err;
140 }
141
142 #undef RULES_DEBUG
143
144 #ifdef RULES_DEBUG
145 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
146 char *snd_pcm_hw_param_names[] = {
147 HW_PARAM(ACCESS),
148 HW_PARAM(FORMAT),
149 HW_PARAM(SUBFORMAT),
150 HW_PARAM(SAMPLE_BITS),
151 HW_PARAM(FRAME_BITS),
152 HW_PARAM(CHANNELS),
153 HW_PARAM(RATE),
154 HW_PARAM(PERIOD_TIME),
155 HW_PARAM(PERIOD_SIZE),
156 HW_PARAM(PERIOD_BYTES),
157 HW_PARAM(PERIODS),
158 HW_PARAM(BUFFER_TIME),
159 HW_PARAM(BUFFER_SIZE),
160 HW_PARAM(BUFFER_BYTES),
161 HW_PARAM(TICK_TIME),
162 };
163 #endif
164
165 int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
166 struct snd_pcm_hw_params *params)
167 {
168 unsigned int k;
169 struct snd_pcm_hardware *hw;
170 struct snd_interval *i = NULL;
171 struct snd_mask *m = NULL;
172 struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
173 unsigned int rstamps[constrs->rules_num];
174 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
175 unsigned int stamp = 2;
176 int changed, again;
177
178 params->info = 0;
179 params->fifo_size = 0;
180 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
181 params->msbits = 0;
182 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
183 params->rate_num = 0;
184 params->rate_den = 0;
185 }
186
187 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
188 m = hw_param_mask(params, k);
189 if (snd_mask_empty(m))
190 return -EINVAL;
191 if (!(params->rmask & (1 << k)))
192 continue;
193 #ifdef RULES_DEBUG
194 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
195 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
196 #endif
197 changed = snd_mask_refine(m, constrs_mask(constrs, k));
198 #ifdef RULES_DEBUG
199 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
200 #endif
201 if (changed)
202 params->cmask |= 1 << k;
203 if (changed < 0)
204 return changed;
205 }
206
207 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
208 i = hw_param_interval(params, k);
209 if (snd_interval_empty(i))
210 return -EINVAL;
211 if (!(params->rmask & (1 << k)))
212 continue;
213 #ifdef RULES_DEBUG
214 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
215 if (i->empty)
216 printk("empty");
217 else
218 printk("%c%u %u%c",
219 i->openmin ? '(' : '[', i->min,
220 i->max, i->openmax ? ')' : ']');
221 printk(" -> ");
222 #endif
223 changed = snd_interval_refine(i, constrs_interval(constrs, k));
224 #ifdef RULES_DEBUG
225 if (i->empty)
226 printk("empty\n");
227 else
228 printk("%c%u %u%c\n",
229 i->openmin ? '(' : '[', i->min,
230 i->max, i->openmax ? ')' : ']');
231 #endif
232 if (changed)
233 params->cmask |= 1 << k;
234 if (changed < 0)
235 return changed;
236 }
237
238 for (k = 0; k < constrs->rules_num; k++)
239 rstamps[k] = 0;
240 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
241 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
242 do {
243 again = 0;
244 for (k = 0; k < constrs->rules_num; k++) {
245 struct snd_pcm_hw_rule *r = &constrs->rules[k];
246 unsigned int d;
247 int doit = 0;
248 if (r->cond && !(r->cond & params->flags))
249 continue;
250 for (d = 0; r->deps[d] >= 0; d++) {
251 if (vstamps[r->deps[d]] > rstamps[k]) {
252 doit = 1;
253 break;
254 }
255 }
256 if (!doit)
257 continue;
258 #ifdef RULES_DEBUG
259 printk(KERN_DEBUG "Rule %d [%p]: ", k, r->func);
260 if (r->var >= 0) {
261 printk("%s = ", snd_pcm_hw_param_names[r->var]);
262 if (hw_is_mask(r->var)) {
263 m = hw_param_mask(params, r->var);
264 printk("%x", *m->bits);
265 } else {
266 i = hw_param_interval(params, r->var);
267 if (i->empty)
268 printk("empty");
269 else
270 printk("%c%u %u%c",
271 i->openmin ? '(' : '[', i->min,
272 i->max, i->openmax ? ')' : ']');
273 }
274 }
275 #endif
276 changed = r->func(params, r);
277 #ifdef RULES_DEBUG
278 if (r->var >= 0) {
279 printk(" -> ");
280 if (hw_is_mask(r->var))
281 printk("%x", *m->bits);
282 else {
283 if (i->empty)
284 printk("empty");
285 else
286 printk("%c%u %u%c",
287 i->openmin ? '(' : '[', i->min,
288 i->max, i->openmax ? ')' : ']');
289 }
290 }
291 printk("\n");
292 #endif
293 rstamps[k] = stamp;
294 if (changed && r->var >= 0) {
295 params->cmask |= (1 << r->var);
296 vstamps[r->var] = stamp;
297 again = 1;
298 }
299 if (changed < 0)
300 return changed;
301 stamp++;
302 }
303 } while (again);
304 if (!params->msbits) {
305 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
306 if (snd_interval_single(i))
307 params->msbits = snd_interval_value(i);
308 }
309
310 if (!params->rate_den) {
311 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
312 if (snd_interval_single(i)) {
313 params->rate_num = snd_interval_value(i);
314 params->rate_den = 1;
315 }
316 }
317
318 hw = &substream->runtime->hw;
319 if (!params->info)
320 params->info = hw->info & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES;
321 if (!params->fifo_size) {
322 m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
323 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
324 if (snd_mask_min(m) == snd_mask_max(m) &&
325 snd_interval_min(i) == snd_interval_max(i)) {
326 changed = substream->ops->ioctl(substream,
327 SNDRV_PCM_IOCTL1_FIFO_SIZE, params);
328 if (changed < 0)
329 return changed;
330 }
331 }
332 params->rmask = 0;
333 return 0;
334 }
335
336 EXPORT_SYMBOL(snd_pcm_hw_refine);
337
338 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
339 struct snd_pcm_hw_params __user * _params)
340 {
341 struct snd_pcm_hw_params *params;
342 int err;
343
344 params = memdup_user(_params, sizeof(*params));
345 if (IS_ERR(params))
346 return PTR_ERR(params);
347
348 err = snd_pcm_hw_refine(substream, params);
349 if (copy_to_user(_params, params, sizeof(*params))) {
350 if (!err)
351 err = -EFAULT;
352 }
353
354 kfree(params);
355 return err;
356 }
357
358 static int period_to_usecs(struct snd_pcm_runtime *runtime)
359 {
360 int usecs;
361
362 if (! runtime->rate)
363 return -1; /* invalid */
364
365 /* take 75% of period time as the deadline */
366 usecs = (750000 / runtime->rate) * runtime->period_size;
367 usecs += ((750000 % runtime->rate) * runtime->period_size) /
368 runtime->rate;
369
370 return usecs;
371 }
372
373 static int calc_boundary(struct snd_pcm_runtime *runtime)
374 {
375 u_int64_t boundary;
376
377 boundary = (u_int64_t)runtime->buffer_size *
378 (u_int64_t)runtime->period_size;
379 #if BITS_PER_LONG < 64
380 /* try to find lowest common multiple for buffer and period */
381 if (boundary > LONG_MAX - runtime->buffer_size) {
382 u_int32_t remainder = -1;
383 u_int32_t divident = runtime->buffer_size;
384 u_int32_t divisor = runtime->period_size;
385 while (remainder) {
386 remainder = divident % divisor;
387 if (remainder) {
388 divident = divisor;
389 divisor = remainder;
390 }
391 }
392 boundary = div_u64(boundary, divisor);
393 if (boundary > LONG_MAX - runtime->buffer_size)
394 return -ERANGE;
395 }
396 #endif
397 if (boundary == 0)
398 return -ERANGE;
399 runtime->boundary = boundary;
400 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
401 runtime->boundary *= 2;
402 return 0;
403 }
404
405 static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
406 struct snd_pcm_hw_params *params)
407 {
408 struct snd_pcm_runtime *runtime;
409 int err, usecs;
410 unsigned int bits;
411 snd_pcm_uframes_t frames;
412
413 if (PCM_RUNTIME_CHECK(substream))
414 return -ENXIO;
415 runtime = substream->runtime;
416 snd_pcm_stream_lock_irq(substream);
417 switch (runtime->status->state) {
418 case SNDRV_PCM_STATE_OPEN:
419 case SNDRV_PCM_STATE_SETUP:
420 case SNDRV_PCM_STATE_PREPARED:
421 break;
422 default:
423 snd_pcm_stream_unlock_irq(substream);
424 return -EBADFD;
425 }
426 snd_pcm_stream_unlock_irq(substream);
427 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
428 if (!substream->oss.oss)
429 #endif
430 if (atomic_read(&substream->mmap_count))
431 return -EBADFD;
432
433 params->rmask = ~0U;
434 err = snd_pcm_hw_refine(substream, params);
435 if (err < 0)
436 goto _error;
437
438 err = snd_pcm_hw_params_choose(substream, params);
439 if (err < 0)
440 goto _error;
441
442 if (substream->ops->hw_params != NULL) {
443 err = substream->ops->hw_params(substream, params);
444 if (err < 0)
445 goto _error;
446 }
447
448 runtime->access = params_access(params);
449 runtime->format = params_format(params);
450 runtime->subformat = params_subformat(params);
451 runtime->channels = params_channels(params);
452 runtime->rate = params_rate(params);
453 runtime->period_size = params_period_size(params);
454 runtime->periods = params_periods(params);
455 runtime->buffer_size = params_buffer_size(params);
456 runtime->info = params->info;
457 runtime->rate_num = params->rate_num;
458 runtime->rate_den = params->rate_den;
459
460 bits = snd_pcm_format_physical_width(runtime->format);
461 runtime->sample_bits = bits;
462 bits *= runtime->channels;
463 runtime->frame_bits = bits;
464 frames = 1;
465 while (bits % 8 != 0) {
466 bits *= 2;
467 frames *= 2;
468 }
469 runtime->byte_align = bits / 8;
470 runtime->min_align = frames;
471
472 /* Default sw params */
473 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
474 runtime->period_step = 1;
475 runtime->control->avail_min = runtime->period_size;
476 runtime->start_threshold = 1;
477 runtime->stop_threshold = runtime->buffer_size;
478 runtime->silence_threshold = 0;
479 runtime->silence_size = 0;
480 err = calc_boundary(runtime);
481 if (err < 0)
482 goto _error;
483
484 snd_pcm_timer_resolution_change(substream);
485 runtime->status->state = SNDRV_PCM_STATE_SETUP;
486
487 if (substream->latency_pm_qos_req) {
488 pm_qos_remove_request(substream->latency_pm_qos_req);
489 substream->latency_pm_qos_req = NULL;
490 }
491 if ((usecs = period_to_usecs(runtime)) >= 0)
492 substream->latency_pm_qos_req = pm_qos_add_request(
493 PM_QOS_CPU_DMA_LATENCY, usecs);
494 return 0;
495 _error:
496 /* hardware might be unuseable from this time,
497 so we force application to retry to set
498 the correct hardware parameter settings */
499 runtime->status->state = SNDRV_PCM_STATE_OPEN;
500 if (substream->ops->hw_free != NULL)
501 substream->ops->hw_free(substream);
502 return err;
503 }
504
505 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
506 struct snd_pcm_hw_params __user * _params)
507 {
508 struct snd_pcm_hw_params *params;
509 int err;
510
511 params = memdup_user(_params, sizeof(*params));
512 if (IS_ERR(params))
513 return PTR_ERR(params);
514
515 err = snd_pcm_hw_params(substream, params);
516 if (copy_to_user(_params, params, sizeof(*params))) {
517 if (!err)
518 err = -EFAULT;
519 }
520
521 kfree(params);
522 return err;
523 }
524
525 static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
526 {
527 struct snd_pcm_runtime *runtime;
528 int result = 0;
529
530 if (PCM_RUNTIME_CHECK(substream))
531 return -ENXIO;
532 runtime = substream->runtime;
533 snd_pcm_stream_lock_irq(substream);
534 switch (runtime->status->state) {
535 case SNDRV_PCM_STATE_SETUP:
536 case SNDRV_PCM_STATE_PREPARED:
537 break;
538 default:
539 snd_pcm_stream_unlock_irq(substream);
540 return -EBADFD;
541 }
542 snd_pcm_stream_unlock_irq(substream);
543 if (atomic_read(&substream->mmap_count))
544 return -EBADFD;
545 if (substream->ops->hw_free)
546 result = substream->ops->hw_free(substream);
547 runtime->status->state = SNDRV_PCM_STATE_OPEN;
548 pm_qos_remove_request(substream->latency_pm_qos_req);
549 substream->latency_pm_qos_req = NULL;
550 return result;
551 }
552
553 static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
554 struct snd_pcm_sw_params *params)
555 {
556 struct snd_pcm_runtime *runtime;
557 int err;
558
559 if (PCM_RUNTIME_CHECK(substream))
560 return -ENXIO;
561 runtime = substream->runtime;
562 snd_pcm_stream_lock_irq(substream);
563 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
564 snd_pcm_stream_unlock_irq(substream);
565 return -EBADFD;
566 }
567 snd_pcm_stream_unlock_irq(substream);
568
569 if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
570 return -EINVAL;
571 if (params->avail_min == 0)
572 return -EINVAL;
573 if (params->silence_size >= runtime->boundary) {
574 if (params->silence_threshold != 0)
575 return -EINVAL;
576 } else {
577 if (params->silence_size > params->silence_threshold)
578 return -EINVAL;
579 if (params->silence_threshold > runtime->buffer_size)
580 return -EINVAL;
581 }
582 err = 0;
583 snd_pcm_stream_lock_irq(substream);
584 runtime->tstamp_mode = params->tstamp_mode;
585 runtime->period_step = params->period_step;
586 runtime->control->avail_min = params->avail_min;
587 runtime->start_threshold = params->start_threshold;
588 runtime->stop_threshold = params->stop_threshold;
589 runtime->silence_threshold = params->silence_threshold;
590 runtime->silence_size = params->silence_size;
591 params->boundary = runtime->boundary;
592 if (snd_pcm_running(substream)) {
593 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
594 runtime->silence_size > 0)
595 snd_pcm_playback_silence(substream, ULONG_MAX);
596 err = snd_pcm_update_state(substream, runtime);
597 }
598 snd_pcm_stream_unlock_irq(substream);
599 return err;
600 }
601
602 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
603 struct snd_pcm_sw_params __user * _params)
604 {
605 struct snd_pcm_sw_params params;
606 int err;
607 if (copy_from_user(&params, _params, sizeof(params)))
608 return -EFAULT;
609 err = snd_pcm_sw_params(substream, &params);
610 if (copy_to_user(_params, &params, sizeof(params)))
611 return -EFAULT;
612 return err;
613 }
614
615 int snd_pcm_status(struct snd_pcm_substream *substream,
616 struct snd_pcm_status *status)
617 {
618 struct snd_pcm_runtime *runtime = substream->runtime;
619
620 snd_pcm_stream_lock_irq(substream);
621 status->state = runtime->status->state;
622 status->suspended_state = runtime->status->suspended_state;
623 if (status->state == SNDRV_PCM_STATE_OPEN)
624 goto _end;
625 status->trigger_tstamp = runtime->trigger_tstamp;
626 if (snd_pcm_running(substream)) {
627 snd_pcm_update_hw_ptr(substream);
628 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
629 status->tstamp = runtime->status->tstamp;
630 goto _tstamp_end;
631 }
632 }
633 snd_pcm_gettime(runtime, &status->tstamp);
634 _tstamp_end:
635 status->appl_ptr = runtime->control->appl_ptr;
636 status->hw_ptr = runtime->status->hw_ptr;
637 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
638 status->avail = snd_pcm_playback_avail(runtime);
639 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
640 runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
641 status->delay = runtime->buffer_size - status->avail;
642 status->delay += runtime->delay;
643 } else
644 status->delay = 0;
645 } else {
646 status->avail = snd_pcm_capture_avail(runtime);
647 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
648 status->delay = status->avail + runtime->delay;
649 else
650 status->delay = 0;
651 }
652 status->avail_max = runtime->avail_max;
653 status->overrange = runtime->overrange;
654 runtime->avail_max = 0;
655 runtime->overrange = 0;
656 _end:
657 snd_pcm_stream_unlock_irq(substream);
658 return 0;
659 }
660
661 static int snd_pcm_status_user(struct snd_pcm_substream *substream,
662 struct snd_pcm_status __user * _status)
663 {
664 struct snd_pcm_status status;
665 int res;
666
667 memset(&status, 0, sizeof(status));
668 res = snd_pcm_status(substream, &status);
669 if (res < 0)
670 return res;
671 if (copy_to_user(_status, &status, sizeof(status)))
672 return -EFAULT;
673 return 0;
674 }
675
676 static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
677 struct snd_pcm_channel_info * info)
678 {
679 struct snd_pcm_runtime *runtime;
680 unsigned int channel;
681
682 channel = info->channel;
683 runtime = substream->runtime;
684 snd_pcm_stream_lock_irq(substream);
685 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
686 snd_pcm_stream_unlock_irq(substream);
687 return -EBADFD;
688 }
689 snd_pcm_stream_unlock_irq(substream);
690 if (channel >= runtime->channels)
691 return -EINVAL;
692 memset(info, 0, sizeof(*info));
693 info->channel = channel;
694 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
695 }
696
697 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
698 struct snd_pcm_channel_info __user * _info)
699 {
700 struct snd_pcm_channel_info info;
701 int res;
702
703 if (copy_from_user(&info, _info, sizeof(info)))
704 return -EFAULT;
705 res = snd_pcm_channel_info(substream, &info);
706 if (res < 0)
707 return res;
708 if (copy_to_user(_info, &info, sizeof(info)))
709 return -EFAULT;
710 return 0;
711 }
712
713 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
714 {
715 struct snd_pcm_runtime *runtime = substream->runtime;
716 if (runtime->trigger_master == NULL)
717 return;
718 if (runtime->trigger_master == substream) {
719 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
720 } else {
721 snd_pcm_trigger_tstamp(runtime->trigger_master);
722 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
723 }
724 runtime->trigger_master = NULL;
725 }
726
727 struct action_ops {
728 int (*pre_action)(struct snd_pcm_substream *substream, int state);
729 int (*do_action)(struct snd_pcm_substream *substream, int state);
730 void (*undo_action)(struct snd_pcm_substream *substream, int state);
731 void (*post_action)(struct snd_pcm_substream *substream, int state);
732 };
733
734 /*
735 * this functions is core for handling of linked stream
736 * Note: the stream state might be changed also on failure
737 * Note2: call with calling stream lock + link lock
738 */
739 static int snd_pcm_action_group(struct action_ops *ops,
740 struct snd_pcm_substream *substream,
741 int state, int do_lock)
742 {
743 struct snd_pcm_substream *s = NULL;
744 struct snd_pcm_substream *s1;
745 int res = 0;
746
747 snd_pcm_group_for_each_entry(s, substream) {
748 if (do_lock && s != substream)
749 spin_lock_nested(&s->self_group.lock,
750 SINGLE_DEPTH_NESTING);
751 res = ops->pre_action(s, state);
752 if (res < 0)
753 goto _unlock;
754 }
755 snd_pcm_group_for_each_entry(s, substream) {
756 res = ops->do_action(s, state);
757 if (res < 0) {
758 if (ops->undo_action) {
759 snd_pcm_group_for_each_entry(s1, substream) {
760 if (s1 == s) /* failed stream */
761 break;
762 ops->undo_action(s1, state);
763 }
764 }
765 s = NULL; /* unlock all */
766 goto _unlock;
767 }
768 }
769 snd_pcm_group_for_each_entry(s, substream) {
770 ops->post_action(s, state);
771 }
772 _unlock:
773 if (do_lock) {
774 /* unlock streams */
775 snd_pcm_group_for_each_entry(s1, substream) {
776 if (s1 != substream)
777 spin_unlock(&s1->self_group.lock);
778 if (s1 == s) /* end */
779 break;
780 }
781 }
782 return res;
783 }
784
785 /*
786 * Note: call with stream lock
787 */
788 static int snd_pcm_action_single(struct action_ops *ops,
789 struct snd_pcm_substream *substream,
790 int state)
791 {
792 int res;
793
794 res = ops->pre_action(substream, state);
795 if (res < 0)
796 return res;
797 res = ops->do_action(substream, state);
798 if (res == 0)
799 ops->post_action(substream, state);
800 else if (ops->undo_action)
801 ops->undo_action(substream, state);
802 return res;
803 }
804
805 /*
806 * Note: call with stream lock
807 */
808 static int snd_pcm_action(struct action_ops *ops,
809 struct snd_pcm_substream *substream,
810 int state)
811 {
812 int res;
813
814 if (snd_pcm_stream_linked(substream)) {
815 if (!spin_trylock(&substream->group->lock)) {
816 spin_unlock(&substream->self_group.lock);
817 spin_lock(&substream->group->lock);
818 spin_lock(&substream->self_group.lock);
819 }
820 res = snd_pcm_action_group(ops, substream, state, 1);
821 spin_unlock(&substream->group->lock);
822 } else {
823 res = snd_pcm_action_single(ops, substream, state);
824 }
825 return res;
826 }
827
828 /*
829 * Note: don't use any locks before
830 */
831 static int snd_pcm_action_lock_irq(struct action_ops *ops,
832 struct snd_pcm_substream *substream,
833 int state)
834 {
835 int res;
836
837 read_lock_irq(&snd_pcm_link_rwlock);
838 if (snd_pcm_stream_linked(substream)) {
839 spin_lock(&substream->group->lock);
840 spin_lock(&substream->self_group.lock);
841 res = snd_pcm_action_group(ops, substream, state, 1);
842 spin_unlock(&substream->self_group.lock);
843 spin_unlock(&substream->group->lock);
844 } else {
845 spin_lock(&substream->self_group.lock);
846 res = snd_pcm_action_single(ops, substream, state);
847 spin_unlock(&substream->self_group.lock);
848 }
849 read_unlock_irq(&snd_pcm_link_rwlock);
850 return res;
851 }
852
853 /*
854 */
855 static int snd_pcm_action_nonatomic(struct action_ops *ops,
856 struct snd_pcm_substream *substream,
857 int state)
858 {
859 int res;
860
861 down_read(&snd_pcm_link_rwsem);
862 if (snd_pcm_stream_linked(substream))
863 res = snd_pcm_action_group(ops, substream, state, 0);
864 else
865 res = snd_pcm_action_single(ops, substream, state);
866 up_read(&snd_pcm_link_rwsem);
867 return res;
868 }
869
870 /*
871 * start callbacks
872 */
873 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
874 {
875 struct snd_pcm_runtime *runtime = substream->runtime;
876 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
877 return -EBADFD;
878 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
879 !snd_pcm_playback_data(substream))
880 return -EPIPE;
881 runtime->trigger_master = substream;
882 return 0;
883 }
884
885 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
886 {
887 if (substream->runtime->trigger_master != substream)
888 return 0;
889 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
890 }
891
892 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
893 {
894 if (substream->runtime->trigger_master == substream)
895 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
896 }
897
898 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
899 {
900 struct snd_pcm_runtime *runtime = substream->runtime;
901 snd_pcm_trigger_tstamp(substream);
902 runtime->hw_ptr_jiffies = jiffies;
903 runtime->status->state = state;
904 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
905 runtime->silence_size > 0)
906 snd_pcm_playback_silence(substream, ULONG_MAX);
907 if (substream->timer)
908 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
909 &runtime->trigger_tstamp);
910 }
911
912 static struct action_ops snd_pcm_action_start = {
913 .pre_action = snd_pcm_pre_start,
914 .do_action = snd_pcm_do_start,
915 .undo_action = snd_pcm_undo_start,
916 .post_action = snd_pcm_post_start
917 };
918
919 /**
920 * snd_pcm_start - start all linked streams
921 * @substream: the PCM substream instance
922 */
923 int snd_pcm_start(struct snd_pcm_substream *substream)
924 {
925 return snd_pcm_action(&snd_pcm_action_start, substream,
926 SNDRV_PCM_STATE_RUNNING);
927 }
928
929 /*
930 * stop callbacks
931 */
932 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
933 {
934 struct snd_pcm_runtime *runtime = substream->runtime;
935 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
936 return -EBADFD;
937 runtime->trigger_master = substream;
938 return 0;
939 }
940
941 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
942 {
943 if (substream->runtime->trigger_master == substream &&
944 snd_pcm_running(substream))
945 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
946 return 0; /* unconditonally stop all substreams */
947 }
948
949 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
950 {
951 struct snd_pcm_runtime *runtime = substream->runtime;
952 if (runtime->status->state != state) {
953 snd_pcm_trigger_tstamp(substream);
954 if (substream->timer)
955 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
956 &runtime->trigger_tstamp);
957 runtime->status->state = state;
958 }
959 wake_up(&runtime->sleep);
960 wake_up(&runtime->tsleep);
961 }
962
963 static struct action_ops snd_pcm_action_stop = {
964 .pre_action = snd_pcm_pre_stop,
965 .do_action = snd_pcm_do_stop,
966 .post_action = snd_pcm_post_stop
967 };
968
969 /**
970 * snd_pcm_stop - try to stop all running streams in the substream group
971 * @substream: the PCM substream instance
972 * @state: PCM state after stopping the stream
973 *
974 * The state of each stream is then changed to the given state unconditionally.
975 */
976 int snd_pcm_stop(struct snd_pcm_substream *substream, int state)
977 {
978 return snd_pcm_action(&snd_pcm_action_stop, substream, state);
979 }
980
981 EXPORT_SYMBOL(snd_pcm_stop);
982
983 /**
984 * snd_pcm_drain_done - stop the DMA only when the given stream is playback
985 * @substream: the PCM substream
986 *
987 * After stopping, the state is changed to SETUP.
988 * Unlike snd_pcm_stop(), this affects only the given stream.
989 */
990 int snd_pcm_drain_done(struct snd_pcm_substream *substream)
991 {
992 return snd_pcm_action_single(&snd_pcm_action_stop, substream,
993 SNDRV_PCM_STATE_SETUP);
994 }
995
996 /*
997 * pause callbacks
998 */
999 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
1000 {
1001 struct snd_pcm_runtime *runtime = substream->runtime;
1002 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
1003 return -ENOSYS;
1004 if (push) {
1005 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
1006 return -EBADFD;
1007 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
1008 return -EBADFD;
1009 runtime->trigger_master = substream;
1010 return 0;
1011 }
1012
1013 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
1014 {
1015 if (substream->runtime->trigger_master != substream)
1016 return 0;
1017 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
1018 * a delta betwen the current jiffies, this gives a large enough
1019 * delta, effectively to skip the check once.
1020 */
1021 substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
1022 return substream->ops->trigger(substream,
1023 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
1024 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
1025 }
1026
1027 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
1028 {
1029 if (substream->runtime->trigger_master == substream)
1030 substream->ops->trigger(substream,
1031 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
1032 SNDRV_PCM_TRIGGER_PAUSE_PUSH);
1033 }
1034
1035 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
1036 {
1037 struct snd_pcm_runtime *runtime = substream->runtime;
1038 snd_pcm_trigger_tstamp(substream);
1039 if (push) {
1040 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1041 if (substream->timer)
1042 snd_timer_notify(substream->timer,
1043 SNDRV_TIMER_EVENT_MPAUSE,
1044 &runtime->trigger_tstamp);
1045 wake_up(&runtime->sleep);
1046 wake_up(&runtime->tsleep);
1047 } else {
1048 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1049 if (substream->timer)
1050 snd_timer_notify(substream->timer,
1051 SNDRV_TIMER_EVENT_MCONTINUE,
1052 &runtime->trigger_tstamp);
1053 }
1054 }
1055
1056 static struct action_ops snd_pcm_action_pause = {
1057 .pre_action = snd_pcm_pre_pause,
1058 .do_action = snd_pcm_do_pause,
1059 .undo_action = snd_pcm_undo_pause,
1060 .post_action = snd_pcm_post_pause
1061 };
1062
1063 /*
1064 * Push/release the pause for all linked streams.
1065 */
1066 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1067 {
1068 return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1069 }
1070
1071 #ifdef CONFIG_PM
1072 /* suspend */
1073
1074 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1075 {
1076 struct snd_pcm_runtime *runtime = substream->runtime;
1077 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1078 return -EBUSY;
1079 runtime->trigger_master = substream;
1080 return 0;
1081 }
1082
1083 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1084 {
1085 struct snd_pcm_runtime *runtime = substream->runtime;
1086 if (runtime->trigger_master != substream)
1087 return 0;
1088 if (! snd_pcm_running(substream))
1089 return 0;
1090 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1091 return 0; /* suspend unconditionally */
1092 }
1093
1094 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1095 {
1096 struct snd_pcm_runtime *runtime = substream->runtime;
1097 snd_pcm_trigger_tstamp(substream);
1098 if (substream->timer)
1099 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1100 &runtime->trigger_tstamp);
1101 runtime->status->suspended_state = runtime->status->state;
1102 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1103 wake_up(&runtime->sleep);
1104 wake_up(&runtime->tsleep);
1105 }
1106
1107 static struct action_ops snd_pcm_action_suspend = {
1108 .pre_action = snd_pcm_pre_suspend,
1109 .do_action = snd_pcm_do_suspend,
1110 .post_action = snd_pcm_post_suspend
1111 };
1112
1113 /**
1114 * snd_pcm_suspend - trigger SUSPEND to all linked streams
1115 * @substream: the PCM substream
1116 *
1117 * After this call, all streams are changed to SUSPENDED state.
1118 */
1119 int snd_pcm_suspend(struct snd_pcm_substream *substream)
1120 {
1121 int err;
1122 unsigned long flags;
1123
1124 if (! substream)
1125 return 0;
1126
1127 snd_pcm_stream_lock_irqsave(substream, flags);
1128 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1129 snd_pcm_stream_unlock_irqrestore(substream, flags);
1130 return err;
1131 }
1132
1133 EXPORT_SYMBOL(snd_pcm_suspend);
1134
1135 /**
1136 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
1137 * @pcm: the PCM instance
1138 *
1139 * After this call, all streams are changed to SUSPENDED state.
1140 */
1141 int snd_pcm_suspend_all(struct snd_pcm *pcm)
1142 {
1143 struct snd_pcm_substream *substream;
1144 int stream, err = 0;
1145
1146 if (! pcm)
1147 return 0;
1148
1149 for (stream = 0; stream < 2; stream++) {
1150 for (substream = pcm->streams[stream].substream;
1151 substream; substream = substream->next) {
1152 /* FIXME: the open/close code should lock this as well */
1153 if (substream->runtime == NULL)
1154 continue;
1155 err = snd_pcm_suspend(substream);
1156 if (err < 0 && err != -EBUSY)
1157 return err;
1158 }
1159 }
1160 return 0;
1161 }
1162
1163 EXPORT_SYMBOL(snd_pcm_suspend_all);
1164
1165 /* resume */
1166
1167 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1168 {
1169 struct snd_pcm_runtime *runtime = substream->runtime;
1170 if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1171 return -ENOSYS;
1172 runtime->trigger_master = substream;
1173 return 0;
1174 }
1175
1176 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1177 {
1178 struct snd_pcm_runtime *runtime = substream->runtime;
1179 if (runtime->trigger_master != substream)
1180 return 0;
1181 /* DMA not running previously? */
1182 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1183 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1184 substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1185 return 0;
1186 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1187 }
1188
1189 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1190 {
1191 if (substream->runtime->trigger_master == substream &&
1192 snd_pcm_running(substream))
1193 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1194 }
1195
1196 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1197 {
1198 struct snd_pcm_runtime *runtime = substream->runtime;
1199 snd_pcm_trigger_tstamp(substream);
1200 if (substream->timer)
1201 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1202 &runtime->trigger_tstamp);
1203 runtime->status->state = runtime->status->suspended_state;
1204 }
1205
1206 static struct action_ops snd_pcm_action_resume = {
1207 .pre_action = snd_pcm_pre_resume,
1208 .do_action = snd_pcm_do_resume,
1209 .undo_action = snd_pcm_undo_resume,
1210 .post_action = snd_pcm_post_resume
1211 };
1212
1213 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1214 {
1215 struct snd_card *card = substream->pcm->card;
1216 int res;
1217
1218 snd_power_lock(card);
1219 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1220 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1221 snd_power_unlock(card);
1222 return res;
1223 }
1224
1225 #else
1226
1227 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1228 {
1229 return -ENOSYS;
1230 }
1231
1232 #endif /* CONFIG_PM */
1233
1234 /*
1235 * xrun ioctl
1236 *
1237 * Change the RUNNING stream(s) to XRUN state.
1238 */
1239 static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1240 {
1241 struct snd_card *card = substream->pcm->card;
1242 struct snd_pcm_runtime *runtime = substream->runtime;
1243 int result;
1244
1245 snd_power_lock(card);
1246 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1247 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1248 if (result < 0)
1249 goto _unlock;
1250 }
1251
1252 snd_pcm_stream_lock_irq(substream);
1253 switch (runtime->status->state) {
1254 case SNDRV_PCM_STATE_XRUN:
1255 result = 0; /* already there */
1256 break;
1257 case SNDRV_PCM_STATE_RUNNING:
1258 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1259 break;
1260 default:
1261 result = -EBADFD;
1262 }
1263 snd_pcm_stream_unlock_irq(substream);
1264 _unlock:
1265 snd_power_unlock(card);
1266 return result;
1267 }
1268
1269 /*
1270 * reset ioctl
1271 */
1272 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1273 {
1274 struct snd_pcm_runtime *runtime = substream->runtime;
1275 switch (runtime->status->state) {
1276 case SNDRV_PCM_STATE_RUNNING:
1277 case SNDRV_PCM_STATE_PREPARED:
1278 case SNDRV_PCM_STATE_PAUSED:
1279 case SNDRV_PCM_STATE_SUSPENDED:
1280 return 0;
1281 default:
1282 return -EBADFD;
1283 }
1284 }
1285
1286 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1287 {
1288 struct snd_pcm_runtime *runtime = substream->runtime;
1289 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1290 if (err < 0)
1291 return err;
1292 runtime->hw_ptr_base = 0;
1293 runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1294 runtime->status->hw_ptr % runtime->period_size;
1295 runtime->silence_start = runtime->status->hw_ptr;
1296 runtime->silence_filled = 0;
1297 return 0;
1298 }
1299
1300 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1301 {
1302 struct snd_pcm_runtime *runtime = substream->runtime;
1303 runtime->control->appl_ptr = runtime->status->hw_ptr;
1304 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1305 runtime->silence_size > 0)
1306 snd_pcm_playback_silence(substream, ULONG_MAX);
1307 }
1308
1309 static struct action_ops snd_pcm_action_reset = {
1310 .pre_action = snd_pcm_pre_reset,
1311 .do_action = snd_pcm_do_reset,
1312 .post_action = snd_pcm_post_reset
1313 };
1314
1315 static int snd_pcm_reset(struct snd_pcm_substream *substream)
1316 {
1317 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1318 }
1319
1320 /*
1321 * prepare ioctl
1322 */
1323 /* we use the second argument for updating f_flags */
1324 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1325 int f_flags)
1326 {
1327 struct snd_pcm_runtime *runtime = substream->runtime;
1328 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1329 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1330 return -EBADFD;
1331 if (snd_pcm_running(substream))
1332 return -EBUSY;
1333 substream->f_flags = f_flags;
1334 return 0;
1335 }
1336
1337 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1338 {
1339 int err;
1340 err = substream->ops->prepare(substream);
1341 if (err < 0)
1342 return err;
1343 return snd_pcm_do_reset(substream, 0);
1344 }
1345
1346 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1347 {
1348 struct snd_pcm_runtime *runtime = substream->runtime;
1349 runtime->control->appl_ptr = runtime->status->hw_ptr;
1350 runtime->status->state = SNDRV_PCM_STATE_PREPARED;
1351 }
1352
1353 static struct action_ops snd_pcm_action_prepare = {
1354 .pre_action = snd_pcm_pre_prepare,
1355 .do_action = snd_pcm_do_prepare,
1356 .post_action = snd_pcm_post_prepare
1357 };
1358
1359 /**
1360 * snd_pcm_prepare - prepare the PCM substream to be triggerable
1361 * @substream: the PCM substream instance
1362 * @file: file to refer f_flags
1363 */
1364 static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1365 struct file *file)
1366 {
1367 int res;
1368 struct snd_card *card = substream->pcm->card;
1369 int f_flags;
1370
1371 if (file)
1372 f_flags = file->f_flags;
1373 else
1374 f_flags = substream->f_flags;
1375
1376 snd_power_lock(card);
1377 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1378 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1379 substream, f_flags);
1380 snd_power_unlock(card);
1381 return res;
1382 }
1383
1384 /*
1385 * drain ioctl
1386 */
1387
1388 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1389 {
1390 substream->runtime->trigger_master = substream;
1391 return 0;
1392 }
1393
1394 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1395 {
1396 struct snd_pcm_runtime *runtime = substream->runtime;
1397 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1398 switch (runtime->status->state) {
1399 case SNDRV_PCM_STATE_PREPARED:
1400 /* start playback stream if possible */
1401 if (! snd_pcm_playback_empty(substream)) {
1402 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1403 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1404 }
1405 break;
1406 case SNDRV_PCM_STATE_RUNNING:
1407 runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1408 break;
1409 default:
1410 break;
1411 }
1412 } else {
1413 /* stop running stream */
1414 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1415 int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1416 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1417 snd_pcm_do_stop(substream, new_state);
1418 snd_pcm_post_stop(substream, new_state);
1419 }
1420 }
1421 return 0;
1422 }
1423
1424 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1425 {
1426 }
1427
1428 static struct action_ops snd_pcm_action_drain_init = {
1429 .pre_action = snd_pcm_pre_drain_init,
1430 .do_action = snd_pcm_do_drain_init,
1431 .post_action = snd_pcm_post_drain_init
1432 };
1433
1434 static int snd_pcm_drop(struct snd_pcm_substream *substream);
1435
1436 /*
1437 * Drain the stream(s).
1438 * When the substream is linked, sync until the draining of all playback streams
1439 * is finished.
1440 * After this call, all streams are supposed to be either SETUP or DRAINING
1441 * (capture only) state.
1442 */
1443 static int snd_pcm_drain(struct snd_pcm_substream *substream,
1444 struct file *file)
1445 {
1446 struct snd_card *card;
1447 struct snd_pcm_runtime *runtime;
1448 struct snd_pcm_substream *s;
1449 wait_queue_t wait;
1450 int result = 0;
1451 int nonblock = 0;
1452
1453 card = substream->pcm->card;
1454 runtime = substream->runtime;
1455
1456 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1457 return -EBADFD;
1458
1459 snd_power_lock(card);
1460 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1461 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1462 if (result < 0) {
1463 snd_power_unlock(card);
1464 return result;
1465 }
1466 }
1467
1468 if (file) {
1469 if (file->f_flags & O_NONBLOCK)
1470 nonblock = 1;
1471 } else if (substream->f_flags & O_NONBLOCK)
1472 nonblock = 1;
1473
1474 down_read(&snd_pcm_link_rwsem);
1475 snd_pcm_stream_lock_irq(substream);
1476 /* resume pause */
1477 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1478 snd_pcm_pause(substream, 0);
1479
1480 /* pre-start/stop - all running streams are changed to DRAINING state */
1481 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1482 if (result < 0)
1483 goto unlock;
1484 /* in non-blocking, we don't wait in ioctl but let caller poll */
1485 if (nonblock) {
1486 result = -EAGAIN;
1487 goto unlock;
1488 }
1489
1490 for (;;) {
1491 long tout;
1492 struct snd_pcm_runtime *to_check;
1493 if (signal_pending(current)) {
1494 result = -ERESTARTSYS;
1495 break;
1496 }
1497 /* find a substream to drain */
1498 to_check = NULL;
1499 snd_pcm_group_for_each_entry(s, substream) {
1500 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1501 continue;
1502 runtime = s->runtime;
1503 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1504 to_check = runtime;
1505 break;
1506 }
1507 }
1508 if (!to_check)
1509 break; /* all drained */
1510 init_waitqueue_entry(&wait, current);
1511 add_wait_queue(&to_check->sleep, &wait);
1512 set_current_state(TASK_INTERRUPTIBLE);
1513 snd_pcm_stream_unlock_irq(substream);
1514 up_read(&snd_pcm_link_rwsem);
1515 snd_power_unlock(card);
1516 tout = schedule_timeout(10 * HZ);
1517 snd_power_lock(card);
1518 down_read(&snd_pcm_link_rwsem);
1519 snd_pcm_stream_lock_irq(substream);
1520 remove_wait_queue(&to_check->sleep, &wait);
1521 if (tout == 0) {
1522 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1523 result = -ESTRPIPE;
1524 else {
1525 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1526 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1527 result = -EIO;
1528 }
1529 break;
1530 }
1531 }
1532
1533 unlock:
1534 snd_pcm_stream_unlock_irq(substream);
1535 up_read(&snd_pcm_link_rwsem);
1536 snd_power_unlock(card);
1537
1538 return result;
1539 }
1540
1541 /*
1542 * drop ioctl
1543 *
1544 * Immediately put all linked substreams into SETUP state.
1545 */
1546 static int snd_pcm_drop(struct snd_pcm_substream *substream)
1547 {
1548 struct snd_pcm_runtime *runtime;
1549 struct snd_card *card;
1550 int result = 0;
1551
1552 if (PCM_RUNTIME_CHECK(substream))
1553 return -ENXIO;
1554 runtime = substream->runtime;
1555 card = substream->pcm->card;
1556
1557 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1558 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1559 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1560 return -EBADFD;
1561
1562 snd_pcm_stream_lock_irq(substream);
1563 /* resume pause */
1564 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1565 snd_pcm_pause(substream, 0);
1566
1567 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1568 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1569 snd_pcm_stream_unlock_irq(substream);
1570
1571 return result;
1572 }
1573
1574
1575 /* WARNING: Don't forget to fput back the file */
1576 static struct file *snd_pcm_file_fd(int fd)
1577 {
1578 struct file *file;
1579 struct inode *inode;
1580 unsigned int minor;
1581
1582 file = fget(fd);
1583 if (!file)
1584 return NULL;
1585 inode = file->f_path.dentry->d_inode;
1586 if (!S_ISCHR(inode->i_mode) ||
1587 imajor(inode) != snd_major) {
1588 fput(file);
1589 return NULL;
1590 }
1591 minor = iminor(inode);
1592 if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) &&
1593 !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) {
1594 fput(file);
1595 return NULL;
1596 }
1597 return file;
1598 }
1599
1600 /*
1601 * PCM link handling
1602 */
1603 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1604 {
1605 int res = 0;
1606 struct file *file;
1607 struct snd_pcm_file *pcm_file;
1608 struct snd_pcm_substream *substream1;
1609
1610 file = snd_pcm_file_fd(fd);
1611 if (!file)
1612 return -EBADFD;
1613 pcm_file = file->private_data;
1614 substream1 = pcm_file->substream;
1615 down_write(&snd_pcm_link_rwsem);
1616 write_lock_irq(&snd_pcm_link_rwlock);
1617 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1618 substream->runtime->status->state != substream1->runtime->status->state) {
1619 res = -EBADFD;
1620 goto _end;
1621 }
1622 if (snd_pcm_stream_linked(substream1)) {
1623 res = -EALREADY;
1624 goto _end;
1625 }
1626 if (!snd_pcm_stream_linked(substream)) {
1627 substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC);
1628 if (substream->group == NULL) {
1629 res = -ENOMEM;
1630 goto _end;
1631 }
1632 spin_lock_init(&substream->group->lock);
1633 INIT_LIST_HEAD(&substream->group->substreams);
1634 list_add_tail(&substream->link_list, &substream->group->substreams);
1635 substream->group->count = 1;
1636 }
1637 list_add_tail(&substream1->link_list, &substream->group->substreams);
1638 substream->group->count++;
1639 substream1->group = substream->group;
1640 _end:
1641 write_unlock_irq(&snd_pcm_link_rwlock);
1642 up_write(&snd_pcm_link_rwsem);
1643 fput(file);
1644 return res;
1645 }
1646
1647 static void relink_to_local(struct snd_pcm_substream *substream)
1648 {
1649 substream->group = &substream->self_group;
1650 INIT_LIST_HEAD(&substream->self_group.substreams);
1651 list_add_tail(&substream->link_list, &substream->self_group.substreams);
1652 }
1653
1654 static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1655 {
1656 struct snd_pcm_substream *s;
1657 int res = 0;
1658
1659 down_write(&snd_pcm_link_rwsem);
1660 write_lock_irq(&snd_pcm_link_rwlock);
1661 if (!snd_pcm_stream_linked(substream)) {
1662 res = -EALREADY;
1663 goto _end;
1664 }
1665 list_del(&substream->link_list);
1666 substream->group->count--;
1667 if (substream->group->count == 1) { /* detach the last stream, too */
1668 snd_pcm_group_for_each_entry(s, substream) {
1669 relink_to_local(s);
1670 break;
1671 }
1672 kfree(substream->group);
1673 }
1674 relink_to_local(substream);
1675 _end:
1676 write_unlock_irq(&snd_pcm_link_rwlock);
1677 up_write(&snd_pcm_link_rwsem);
1678 return res;
1679 }
1680
1681 /*
1682 * hw configurator
1683 */
1684 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1685 struct snd_pcm_hw_rule *rule)
1686 {
1687 struct snd_interval t;
1688 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1689 hw_param_interval_c(params, rule->deps[1]), &t);
1690 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1691 }
1692
1693 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1694 struct snd_pcm_hw_rule *rule)
1695 {
1696 struct snd_interval t;
1697 snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1698 hw_param_interval_c(params, rule->deps[1]), &t);
1699 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1700 }
1701
1702 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1703 struct snd_pcm_hw_rule *rule)
1704 {
1705 struct snd_interval t;
1706 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1707 hw_param_interval_c(params, rule->deps[1]),
1708 (unsigned long) rule->private, &t);
1709 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1710 }
1711
1712 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1713 struct snd_pcm_hw_rule *rule)
1714 {
1715 struct snd_interval t;
1716 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1717 (unsigned long) rule->private,
1718 hw_param_interval_c(params, rule->deps[1]), &t);
1719 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1720 }
1721
1722 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1723 struct snd_pcm_hw_rule *rule)
1724 {
1725 unsigned int k;
1726 struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1727 struct snd_mask m;
1728 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1729 snd_mask_any(&m);
1730 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1731 int bits;
1732 if (! snd_mask_test(mask, k))
1733 continue;
1734 bits = snd_pcm_format_physical_width(k);
1735 if (bits <= 0)
1736 continue; /* ignore invalid formats */
1737 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1738 snd_mask_reset(&m, k);
1739 }
1740 return snd_mask_refine(mask, &m);
1741 }
1742
1743 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1744 struct snd_pcm_hw_rule *rule)
1745 {
1746 struct snd_interval t;
1747 unsigned int k;
1748 t.min = UINT_MAX;
1749 t.max = 0;
1750 t.openmin = 0;
1751 t.openmax = 0;
1752 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1753 int bits;
1754 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1755 continue;
1756 bits = snd_pcm_format_physical_width(k);
1757 if (bits <= 0)
1758 continue; /* ignore invalid formats */
1759 if (t.min > (unsigned)bits)
1760 t.min = bits;
1761 if (t.max < (unsigned)bits)
1762 t.max = bits;
1763 }
1764 t.integer = 1;
1765 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1766 }
1767
1768 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1769 #error "Change this table"
1770 #endif
1771
1772 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1773 48000, 64000, 88200, 96000, 176400, 192000 };
1774
1775 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1776 .count = ARRAY_SIZE(rates),
1777 .list = rates,
1778 };
1779
1780 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1781 struct snd_pcm_hw_rule *rule)
1782 {
1783 struct snd_pcm_hardware *hw = rule->private;
1784 return snd_interval_list(hw_param_interval(params, rule->var),
1785 snd_pcm_known_rates.count,
1786 snd_pcm_known_rates.list, hw->rates);
1787 }
1788
1789 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1790 struct snd_pcm_hw_rule *rule)
1791 {
1792 struct snd_interval t;
1793 struct snd_pcm_substream *substream = rule->private;
1794 t.min = 0;
1795 t.max = substream->buffer_bytes_max;
1796 t.openmin = 0;
1797 t.openmax = 0;
1798 t.integer = 1;
1799 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1800 }
1801
1802 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1803 {
1804 struct snd_pcm_runtime *runtime = substream->runtime;
1805 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1806 int k, err;
1807
1808 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1809 snd_mask_any(constrs_mask(constrs, k));
1810 }
1811
1812 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1813 snd_interval_any(constrs_interval(constrs, k));
1814 }
1815
1816 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1817 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1818 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1819 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1820 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1821
1822 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1823 snd_pcm_hw_rule_format, NULL,
1824 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1825 if (err < 0)
1826 return err;
1827 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1828 snd_pcm_hw_rule_sample_bits, NULL,
1829 SNDRV_PCM_HW_PARAM_FORMAT,
1830 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1831 if (err < 0)
1832 return err;
1833 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1834 snd_pcm_hw_rule_div, NULL,
1835 SNDRV_PCM_HW_PARAM_FRAME_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_mul, NULL,
1840 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -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_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1846 if (err < 0)
1847 return err;
1848 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1849 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1850 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1851 if (err < 0)
1852 return err;
1853 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1854 snd_pcm_hw_rule_div, NULL,
1855 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -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_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1861 if (err < 0)
1862 return err;
1863 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1864 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1865 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1866 if (err < 0)
1867 return err;
1868 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
1869 snd_pcm_hw_rule_div, NULL,
1870 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -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_div, NULL,
1875 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -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_mulkdiv, (void*) 8,
1880 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1881 if (err < 0)
1882 return err;
1883 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1884 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1885 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -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_mul, NULL,
1890 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -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_mulkdiv, (void*) 8,
1895 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1896 if (err < 0)
1897 return err;
1898 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1899 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1900 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1901 if (err < 0)
1902 return err;
1903 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1904 snd_pcm_hw_rule_muldivk, (void*) 8,
1905 SNDRV_PCM_HW_PARAM_PERIOD_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_BUFFER_BYTES,
1909 snd_pcm_hw_rule_muldivk, (void*) 8,
1910 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1911 if (err < 0)
1912 return err;
1913 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1914 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1915 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1916 if (err < 0)
1917 return err;
1918 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
1919 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1920 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1921 if (err < 0)
1922 return err;
1923 return 0;
1924 }
1925
1926 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1927 {
1928 struct snd_pcm_runtime *runtime = substream->runtime;
1929 struct snd_pcm_hardware *hw = &runtime->hw;
1930 int err;
1931 unsigned int mask = 0;
1932
1933 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1934 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1935 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1936 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1937 if (hw->info & SNDRV_PCM_INFO_MMAP) {
1938 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1939 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1940 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1941 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1942 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1943 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1944 }
1945 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
1946 if (err < 0)
1947 return err;
1948
1949 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
1950 if (err < 0)
1951 return err;
1952
1953 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
1954 if (err < 0)
1955 return err;
1956
1957 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1958 hw->channels_min, hw->channels_max);
1959 if (err < 0)
1960 return err;
1961
1962 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1963 hw->rate_min, hw->rate_max);
1964 if (err < 0)
1965 return err;
1966
1967 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1968 hw->period_bytes_min, hw->period_bytes_max);
1969 if (err < 0)
1970 return err;
1971
1972 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1973 hw->periods_min, hw->periods_max);
1974 if (err < 0)
1975 return err;
1976
1977 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1978 hw->period_bytes_min, hw->buffer_bytes_max);
1979 if (err < 0)
1980 return err;
1981
1982 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1983 snd_pcm_hw_rule_buffer_bytes_max, substream,
1984 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1985 if (err < 0)
1986 return err;
1987
1988 /* FIXME: remove */
1989 if (runtime->dma_bytes) {
1990 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
1991 if (err < 0)
1992 return -EINVAL;
1993 }
1994
1995 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
1996 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1997 snd_pcm_hw_rule_rate, hw,
1998 SNDRV_PCM_HW_PARAM_RATE, -1);
1999 if (err < 0)
2000 return err;
2001 }
2002
2003 /* FIXME: this belong to lowlevel */
2004 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
2005
2006 return 0;
2007 }
2008
2009 static void pcm_release_private(struct snd_pcm_substream *substream)
2010 {
2011 snd_pcm_unlink(substream);
2012 }
2013
2014 void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2015 {
2016 substream->ref_count--;
2017 if (substream->ref_count > 0)
2018 return;
2019
2020 snd_pcm_drop(substream);
2021 if (substream->hw_opened) {
2022 if (substream->ops->hw_free != NULL)
2023 substream->ops->hw_free(substream);
2024 substream->ops->close(substream);
2025 substream->hw_opened = 0;
2026 }
2027 if (substream->pcm_release) {
2028 substream->pcm_release(substream);
2029 substream->pcm_release = NULL;
2030 }
2031 snd_pcm_detach_substream(substream);
2032 }
2033
2034 EXPORT_SYMBOL(snd_pcm_release_substream);
2035
2036 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2037 struct file *file,
2038 struct snd_pcm_substream **rsubstream)
2039 {
2040 struct snd_pcm_substream *substream;
2041 int err;
2042
2043 err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2044 if (err < 0)
2045 return err;
2046 if (substream->ref_count > 1) {
2047 *rsubstream = substream;
2048 return 0;
2049 }
2050
2051 err = snd_pcm_hw_constraints_init(substream);
2052 if (err < 0) {
2053 snd_printd("snd_pcm_hw_constraints_init failed\n");
2054 goto error;
2055 }
2056
2057 if ((err = substream->ops->open(substream)) < 0)
2058 goto error;
2059
2060 substream->hw_opened = 1;
2061
2062 err = snd_pcm_hw_constraints_complete(substream);
2063 if (err < 0) {
2064 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2065 goto error;
2066 }
2067
2068 *rsubstream = substream;
2069 return 0;
2070
2071 error:
2072 snd_pcm_release_substream(substream);
2073 return err;
2074 }
2075
2076 EXPORT_SYMBOL(snd_pcm_open_substream);
2077
2078 static int snd_pcm_open_file(struct file *file,
2079 struct snd_pcm *pcm,
2080 int stream,
2081 struct snd_pcm_file **rpcm_file)
2082 {
2083 struct snd_pcm_file *pcm_file;
2084 struct snd_pcm_substream *substream;
2085 struct snd_pcm_str *str;
2086 int err;
2087
2088 if (rpcm_file)
2089 *rpcm_file = NULL;
2090
2091 err = snd_pcm_open_substream(pcm, stream, file, &substream);
2092 if (err < 0)
2093 return err;
2094
2095 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2096 if (pcm_file == NULL) {
2097 snd_pcm_release_substream(substream);
2098 return -ENOMEM;
2099 }
2100 pcm_file->substream = substream;
2101 if (substream->ref_count == 1) {
2102 str = substream->pstr;
2103 substream->file = pcm_file;
2104 substream->pcm_release = pcm_release_private;
2105 }
2106 file->private_data = pcm_file;
2107 if (rpcm_file)
2108 *rpcm_file = pcm_file;
2109 return 0;
2110 }
2111
2112 static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2113 {
2114 struct snd_pcm *pcm;
2115
2116 pcm = snd_lookup_minor_data(iminor(inode),
2117 SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2118 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2119 }
2120
2121 static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2122 {
2123 struct snd_pcm *pcm;
2124
2125 pcm = snd_lookup_minor_data(iminor(inode),
2126 SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2127 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2128 }
2129
2130 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2131 {
2132 int err;
2133 struct snd_pcm_file *pcm_file;
2134 wait_queue_t wait;
2135
2136 if (pcm == NULL) {
2137 err = -ENODEV;
2138 goto __error1;
2139 }
2140 err = snd_card_file_add(pcm->card, file);
2141 if (err < 0)
2142 goto __error1;
2143 if (!try_module_get(pcm->card->module)) {
2144 err = -EFAULT;
2145 goto __error2;
2146 }
2147 init_waitqueue_entry(&wait, current);
2148 add_wait_queue(&pcm->open_wait, &wait);
2149 mutex_lock(&pcm->open_mutex);
2150 while (1) {
2151 err = snd_pcm_open_file(file, pcm, stream, &pcm_file);
2152 if (err >= 0)
2153 break;
2154 if (err == -EAGAIN) {
2155 if (file->f_flags & O_NONBLOCK) {
2156 err = -EBUSY;
2157 break;
2158 }
2159 } else
2160 break;
2161 set_current_state(TASK_INTERRUPTIBLE);
2162 mutex_unlock(&pcm->open_mutex);
2163 schedule();
2164 mutex_lock(&pcm->open_mutex);
2165 if (signal_pending(current)) {
2166 err = -ERESTARTSYS;
2167 break;
2168 }
2169 }
2170 remove_wait_queue(&pcm->open_wait, &wait);
2171 mutex_unlock(&pcm->open_mutex);
2172 if (err < 0)
2173 goto __error;
2174 return err;
2175
2176 __error:
2177 module_put(pcm->card->module);
2178 __error2:
2179 snd_card_file_remove(pcm->card, file);
2180 __error1:
2181 return err;
2182 }
2183
2184 static int snd_pcm_release(struct inode *inode, struct file *file)
2185 {
2186 struct snd_pcm *pcm;
2187 struct snd_pcm_substream *substream;
2188 struct snd_pcm_file *pcm_file;
2189
2190 pcm_file = file->private_data;
2191 substream = pcm_file->substream;
2192 if (snd_BUG_ON(!substream))
2193 return -ENXIO;
2194 pcm = substream->pcm;
2195 mutex_lock(&pcm->open_mutex);
2196 snd_pcm_release_substream(substream);
2197 kfree(pcm_file);
2198 mutex_unlock(&pcm->open_mutex);
2199 wake_up(&pcm->open_wait);
2200 module_put(pcm->card->module);
2201 snd_card_file_remove(pcm->card, file);
2202 return 0;
2203 }
2204
2205 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2206 snd_pcm_uframes_t frames)
2207 {
2208 struct snd_pcm_runtime *runtime = substream->runtime;
2209 snd_pcm_sframes_t appl_ptr;
2210 snd_pcm_sframes_t ret;
2211 snd_pcm_sframes_t hw_avail;
2212
2213 if (frames == 0)
2214 return 0;
2215
2216 snd_pcm_stream_lock_irq(substream);
2217 switch (runtime->status->state) {
2218 case SNDRV_PCM_STATE_PREPARED:
2219 break;
2220 case SNDRV_PCM_STATE_DRAINING:
2221 case SNDRV_PCM_STATE_RUNNING:
2222 if (snd_pcm_update_hw_ptr(substream) >= 0)
2223 break;
2224 /* Fall through */
2225 case SNDRV_PCM_STATE_XRUN:
2226 ret = -EPIPE;
2227 goto __end;
2228 case SNDRV_PCM_STATE_SUSPENDED:
2229 ret = -ESTRPIPE;
2230 goto __end;
2231 default:
2232 ret = -EBADFD;
2233 goto __end;
2234 }
2235
2236 hw_avail = snd_pcm_playback_hw_avail(runtime);
2237 if (hw_avail <= 0) {
2238 ret = 0;
2239 goto __end;
2240 }
2241 if (frames > (snd_pcm_uframes_t)hw_avail)
2242 frames = hw_avail;
2243 appl_ptr = runtime->control->appl_ptr - frames;
2244 if (appl_ptr < 0)
2245 appl_ptr += runtime->boundary;
2246 runtime->control->appl_ptr = appl_ptr;
2247 ret = frames;
2248 __end:
2249 snd_pcm_stream_unlock_irq(substream);
2250 return ret;
2251 }
2252
2253 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2254 snd_pcm_uframes_t frames)
2255 {
2256 struct snd_pcm_runtime *runtime = substream->runtime;
2257 snd_pcm_sframes_t appl_ptr;
2258 snd_pcm_sframes_t ret;
2259 snd_pcm_sframes_t hw_avail;
2260
2261 if (frames == 0)
2262 return 0;
2263
2264 snd_pcm_stream_lock_irq(substream);
2265 switch (runtime->status->state) {
2266 case SNDRV_PCM_STATE_PREPARED:
2267 case SNDRV_PCM_STATE_DRAINING:
2268 break;
2269 case SNDRV_PCM_STATE_RUNNING:
2270 if (snd_pcm_update_hw_ptr(substream) >= 0)
2271 break;
2272 /* Fall through */
2273 case SNDRV_PCM_STATE_XRUN:
2274 ret = -EPIPE;
2275 goto __end;
2276 case SNDRV_PCM_STATE_SUSPENDED:
2277 ret = -ESTRPIPE;
2278 goto __end;
2279 default:
2280 ret = -EBADFD;
2281 goto __end;
2282 }
2283
2284 hw_avail = snd_pcm_capture_hw_avail(runtime);
2285 if (hw_avail <= 0) {
2286 ret = 0;
2287 goto __end;
2288 }
2289 if (frames > (snd_pcm_uframes_t)hw_avail)
2290 frames = hw_avail;
2291 appl_ptr = runtime->control->appl_ptr - frames;
2292 if (appl_ptr < 0)
2293 appl_ptr += runtime->boundary;
2294 runtime->control->appl_ptr = appl_ptr;
2295 ret = frames;
2296 __end:
2297 snd_pcm_stream_unlock_irq(substream);
2298 return ret;
2299 }
2300
2301 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2302 snd_pcm_uframes_t frames)
2303 {
2304 struct snd_pcm_runtime *runtime = substream->runtime;
2305 snd_pcm_sframes_t appl_ptr;
2306 snd_pcm_sframes_t ret;
2307 snd_pcm_sframes_t avail;
2308
2309 if (frames == 0)
2310 return 0;
2311
2312 snd_pcm_stream_lock_irq(substream);
2313 switch (runtime->status->state) {
2314 case SNDRV_PCM_STATE_PREPARED:
2315 case SNDRV_PCM_STATE_PAUSED:
2316 break;
2317 case SNDRV_PCM_STATE_DRAINING:
2318 case SNDRV_PCM_STATE_RUNNING:
2319 if (snd_pcm_update_hw_ptr(substream) >= 0)
2320 break;
2321 /* Fall through */
2322 case SNDRV_PCM_STATE_XRUN:
2323 ret = -EPIPE;
2324 goto __end;
2325 case SNDRV_PCM_STATE_SUSPENDED:
2326 ret = -ESTRPIPE;
2327 goto __end;
2328 default:
2329 ret = -EBADFD;
2330 goto __end;
2331 }
2332
2333 avail = snd_pcm_playback_avail(runtime);
2334 if (avail <= 0) {
2335 ret = 0;
2336 goto __end;
2337 }
2338 if (frames > (snd_pcm_uframes_t)avail)
2339 frames = avail;
2340 appl_ptr = runtime->control->appl_ptr + frames;
2341 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2342 appl_ptr -= runtime->boundary;
2343 runtime->control->appl_ptr = appl_ptr;
2344 ret = frames;
2345 __end:
2346 snd_pcm_stream_unlock_irq(substream);
2347 return ret;
2348 }
2349
2350 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2351 snd_pcm_uframes_t frames)
2352 {
2353 struct snd_pcm_runtime *runtime = substream->runtime;
2354 snd_pcm_sframes_t appl_ptr;
2355 snd_pcm_sframes_t ret;
2356 snd_pcm_sframes_t avail;
2357
2358 if (frames == 0)
2359 return 0;
2360
2361 snd_pcm_stream_lock_irq(substream);
2362 switch (runtime->status->state) {
2363 case SNDRV_PCM_STATE_PREPARED:
2364 case SNDRV_PCM_STATE_DRAINING:
2365 case SNDRV_PCM_STATE_PAUSED:
2366 break;
2367 case SNDRV_PCM_STATE_RUNNING:
2368 if (snd_pcm_update_hw_ptr(substream) >= 0)
2369 break;
2370 /* Fall through */
2371 case SNDRV_PCM_STATE_XRUN:
2372 ret = -EPIPE;
2373 goto __end;
2374 case SNDRV_PCM_STATE_SUSPENDED:
2375 ret = -ESTRPIPE;
2376 goto __end;
2377 default:
2378 ret = -EBADFD;
2379 goto __end;
2380 }
2381
2382 avail = snd_pcm_capture_avail(runtime);
2383 if (avail <= 0) {
2384 ret = 0;
2385 goto __end;
2386 }
2387 if (frames > (snd_pcm_uframes_t)avail)
2388 frames = avail;
2389 appl_ptr = runtime->control->appl_ptr + frames;
2390 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2391 appl_ptr -= runtime->boundary;
2392 runtime->control->appl_ptr = appl_ptr;
2393 ret = frames;
2394 __end:
2395 snd_pcm_stream_unlock_irq(substream);
2396 return ret;
2397 }
2398
2399 static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2400 {
2401 struct snd_pcm_runtime *runtime = substream->runtime;
2402 int err;
2403
2404 snd_pcm_stream_lock_irq(substream);
2405 switch (runtime->status->state) {
2406 case SNDRV_PCM_STATE_DRAINING:
2407 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2408 goto __badfd;
2409 case SNDRV_PCM_STATE_RUNNING:
2410 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2411 break;
2412 /* Fall through */
2413 case SNDRV_PCM_STATE_PREPARED:
2414 case SNDRV_PCM_STATE_SUSPENDED:
2415 err = 0;
2416 break;
2417 case SNDRV_PCM_STATE_XRUN:
2418 err = -EPIPE;
2419 break;
2420 default:
2421 __badfd:
2422 err = -EBADFD;
2423 break;
2424 }
2425 snd_pcm_stream_unlock_irq(substream);
2426 return err;
2427 }
2428
2429 static int snd_pcm_delay(struct snd_pcm_substream *substream,
2430 snd_pcm_sframes_t __user *res)
2431 {
2432 struct snd_pcm_runtime *runtime = substream->runtime;
2433 int err;
2434 snd_pcm_sframes_t n = 0;
2435
2436 snd_pcm_stream_lock_irq(substream);
2437 switch (runtime->status->state) {
2438 case SNDRV_PCM_STATE_DRAINING:
2439 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2440 goto __badfd;
2441 case SNDRV_PCM_STATE_RUNNING:
2442 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2443 break;
2444 /* Fall through */
2445 case SNDRV_PCM_STATE_PREPARED:
2446 case SNDRV_PCM_STATE_SUSPENDED:
2447 err = 0;
2448 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2449 n = snd_pcm_playback_hw_avail(runtime);
2450 else
2451 n = snd_pcm_capture_avail(runtime);
2452 n += runtime->delay;
2453 break;
2454 case SNDRV_PCM_STATE_XRUN:
2455 err = -EPIPE;
2456 break;
2457 default:
2458 __badfd:
2459 err = -EBADFD;
2460 break;
2461 }
2462 snd_pcm_stream_unlock_irq(substream);
2463 if (!err)
2464 if (put_user(n, res))
2465 err = -EFAULT;
2466 return err;
2467 }
2468
2469 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2470 struct snd_pcm_sync_ptr __user *_sync_ptr)
2471 {
2472 struct snd_pcm_runtime *runtime = substream->runtime;
2473 struct snd_pcm_sync_ptr sync_ptr;
2474 volatile struct snd_pcm_mmap_status *status;
2475 volatile struct snd_pcm_mmap_control *control;
2476 int err;
2477
2478 memset(&sync_ptr, 0, sizeof(sync_ptr));
2479 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2480 return -EFAULT;
2481 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2482 return -EFAULT;
2483 status = runtime->status;
2484 control = runtime->control;
2485 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2486 err = snd_pcm_hwsync(substream);
2487 if (err < 0)
2488 return err;
2489 }
2490 snd_pcm_stream_lock_irq(substream);
2491 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2492 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2493 else
2494 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2495 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2496 control->avail_min = sync_ptr.c.control.avail_min;
2497 else
2498 sync_ptr.c.control.avail_min = control->avail_min;
2499 sync_ptr.s.status.state = status->state;
2500 sync_ptr.s.status.hw_ptr = status->hw_ptr;
2501 sync_ptr.s.status.tstamp = status->tstamp;
2502 sync_ptr.s.status.suspended_state = status->suspended_state;
2503 snd_pcm_stream_unlock_irq(substream);
2504 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2505 return -EFAULT;
2506 return 0;
2507 }
2508
2509 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2510 {
2511 struct snd_pcm_runtime *runtime = substream->runtime;
2512 int arg;
2513
2514 if (get_user(arg, _arg))
2515 return -EFAULT;
2516 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2517 return -EINVAL;
2518 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY;
2519 if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
2520 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC;
2521 return 0;
2522 }
2523
2524 static int snd_pcm_common_ioctl1(struct file *file,
2525 struct snd_pcm_substream *substream,
2526 unsigned int cmd, void __user *arg)
2527 {
2528 switch (cmd) {
2529 case SNDRV_PCM_IOCTL_PVERSION:
2530 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2531 case SNDRV_PCM_IOCTL_INFO:
2532 return snd_pcm_info_user(substream, arg);
2533 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
2534 return 0;
2535 case SNDRV_PCM_IOCTL_TTSTAMP:
2536 return snd_pcm_tstamp(substream, arg);
2537 case SNDRV_PCM_IOCTL_HW_REFINE:
2538 return snd_pcm_hw_refine_user(substream, arg);
2539 case SNDRV_PCM_IOCTL_HW_PARAMS:
2540 return snd_pcm_hw_params_user(substream, arg);
2541 case SNDRV_PCM_IOCTL_HW_FREE:
2542 return snd_pcm_hw_free(substream);
2543 case SNDRV_PCM_IOCTL_SW_PARAMS:
2544 return snd_pcm_sw_params_user(substream, arg);
2545 case SNDRV_PCM_IOCTL_STATUS:
2546 return snd_pcm_status_user(substream, arg);
2547 case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2548 return snd_pcm_channel_info_user(substream, arg);
2549 case SNDRV_PCM_IOCTL_PREPARE:
2550 return snd_pcm_prepare(substream, file);
2551 case SNDRV_PCM_IOCTL_RESET:
2552 return snd_pcm_reset(substream);
2553 case SNDRV_PCM_IOCTL_START:
2554 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2555 case SNDRV_PCM_IOCTL_LINK:
2556 return snd_pcm_link(substream, (int)(unsigned long) arg);
2557 case SNDRV_PCM_IOCTL_UNLINK:
2558 return snd_pcm_unlink(substream);
2559 case SNDRV_PCM_IOCTL_RESUME:
2560 return snd_pcm_resume(substream);
2561 case SNDRV_PCM_IOCTL_XRUN:
2562 return snd_pcm_xrun(substream);
2563 case SNDRV_PCM_IOCTL_HWSYNC:
2564 return snd_pcm_hwsync(substream);
2565 case SNDRV_PCM_IOCTL_DELAY:
2566 return snd_pcm_delay(substream, arg);
2567 case SNDRV_PCM_IOCTL_SYNC_PTR:
2568 return snd_pcm_sync_ptr(substream, arg);
2569 #ifdef CONFIG_SND_SUPPORT_OLD_API
2570 case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2571 return snd_pcm_hw_refine_old_user(substream, arg);
2572 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2573 return snd_pcm_hw_params_old_user(substream, arg);
2574 #endif
2575 case SNDRV_PCM_IOCTL_DRAIN:
2576 return snd_pcm_drain(substream, file);
2577 case SNDRV_PCM_IOCTL_DROP:
2578 return snd_pcm_drop(substream);
2579 case SNDRV_PCM_IOCTL_PAUSE:
2580 {
2581 int res;
2582 snd_pcm_stream_lock_irq(substream);
2583 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2584 snd_pcm_stream_unlock_irq(substream);
2585 return res;
2586 }
2587 }
2588 snd_printd("unknown ioctl = 0x%x\n", cmd);
2589 return -ENOTTY;
2590 }
2591
2592 static int snd_pcm_playback_ioctl1(struct file *file,
2593 struct snd_pcm_substream *substream,
2594 unsigned int cmd, void __user *arg)
2595 {
2596 if (snd_BUG_ON(!substream))
2597 return -ENXIO;
2598 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2599 return -EINVAL;
2600 switch (cmd) {
2601 case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2602 {
2603 struct snd_xferi xferi;
2604 struct snd_xferi __user *_xferi = arg;
2605 struct snd_pcm_runtime *runtime = substream->runtime;
2606 snd_pcm_sframes_t result;
2607 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2608 return -EBADFD;
2609 if (put_user(0, &_xferi->result))
2610 return -EFAULT;
2611 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2612 return -EFAULT;
2613 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2614 __put_user(result, &_xferi->result);
2615 return result < 0 ? result : 0;
2616 }
2617 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2618 {
2619 struct snd_xfern xfern;
2620 struct snd_xfern __user *_xfern = arg;
2621 struct snd_pcm_runtime *runtime = substream->runtime;
2622 void __user **bufs;
2623 snd_pcm_sframes_t result;
2624 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2625 return -EBADFD;
2626 if (runtime->channels > 128)
2627 return -EINVAL;
2628 if (put_user(0, &_xfern->result))
2629 return -EFAULT;
2630 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2631 return -EFAULT;
2632
2633 bufs = memdup_user(xfern.bufs,
2634 sizeof(void *) * runtime->channels);
2635 if (IS_ERR(bufs))
2636 return PTR_ERR(bufs);
2637 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2638 kfree(bufs);
2639 __put_user(result, &_xfern->result);
2640 return result < 0 ? result : 0;
2641 }
2642 case SNDRV_PCM_IOCTL_REWIND:
2643 {
2644 snd_pcm_uframes_t frames;
2645 snd_pcm_uframes_t __user *_frames = arg;
2646 snd_pcm_sframes_t result;
2647 if (get_user(frames, _frames))
2648 return -EFAULT;
2649 if (put_user(0, _frames))
2650 return -EFAULT;
2651 result = snd_pcm_playback_rewind(substream, frames);
2652 __put_user(result, _frames);
2653 return result < 0 ? result : 0;
2654 }
2655 case SNDRV_PCM_IOCTL_FORWARD:
2656 {
2657 snd_pcm_uframes_t frames;
2658 snd_pcm_uframes_t __user *_frames = arg;
2659 snd_pcm_sframes_t result;
2660 if (get_user(frames, _frames))
2661 return -EFAULT;
2662 if (put_user(0, _frames))
2663 return -EFAULT;
2664 result = snd_pcm_playback_forward(substream, frames);
2665 __put_user(result, _frames);
2666 return result < 0 ? result : 0;
2667 }
2668 }
2669 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2670 }
2671
2672 static int snd_pcm_capture_ioctl1(struct file *file,
2673 struct snd_pcm_substream *substream,
2674 unsigned int cmd, void __user *arg)
2675 {
2676 if (snd_BUG_ON(!substream))
2677 return -ENXIO;
2678 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2679 return -EINVAL;
2680 switch (cmd) {
2681 case SNDRV_PCM_IOCTL_READI_FRAMES:
2682 {
2683 struct snd_xferi xferi;
2684 struct snd_xferi __user *_xferi = arg;
2685 struct snd_pcm_runtime *runtime = substream->runtime;
2686 snd_pcm_sframes_t result;
2687 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2688 return -EBADFD;
2689 if (put_user(0, &_xferi->result))
2690 return -EFAULT;
2691 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2692 return -EFAULT;
2693 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2694 __put_user(result, &_xferi->result);
2695 return result < 0 ? result : 0;
2696 }
2697 case SNDRV_PCM_IOCTL_READN_FRAMES:
2698 {
2699 struct snd_xfern xfern;
2700 struct snd_xfern __user *_xfern = arg;
2701 struct snd_pcm_runtime *runtime = substream->runtime;
2702 void *bufs;
2703 snd_pcm_sframes_t result;
2704 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2705 return -EBADFD;
2706 if (runtime->channels > 128)
2707 return -EINVAL;
2708 if (put_user(0, &_xfern->result))
2709 return -EFAULT;
2710 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2711 return -EFAULT;
2712
2713 bufs = memdup_user(xfern.bufs,
2714 sizeof(void *) * runtime->channels);
2715 if (IS_ERR(bufs))
2716 return PTR_ERR(bufs);
2717 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2718 kfree(bufs);
2719 __put_user(result, &_xfern->result);
2720 return result < 0 ? result : 0;
2721 }
2722 case SNDRV_PCM_IOCTL_REWIND:
2723 {
2724 snd_pcm_uframes_t frames;
2725 snd_pcm_uframes_t __user *_frames = arg;
2726 snd_pcm_sframes_t result;
2727 if (get_user(frames, _frames))
2728 return -EFAULT;
2729 if (put_user(0, _frames))
2730 return -EFAULT;
2731 result = snd_pcm_capture_rewind(substream, frames);
2732 __put_user(result, _frames);
2733 return result < 0 ? result : 0;
2734 }
2735 case SNDRV_PCM_IOCTL_FORWARD:
2736 {
2737 snd_pcm_uframes_t frames;
2738 snd_pcm_uframes_t __user *_frames = arg;
2739 snd_pcm_sframes_t result;
2740 if (get_user(frames, _frames))
2741 return -EFAULT;
2742 if (put_user(0, _frames))
2743 return -EFAULT;
2744 result = snd_pcm_capture_forward(substream, frames);
2745 __put_user(result, _frames);
2746 return result < 0 ? result : 0;
2747 }
2748 }
2749 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2750 }
2751
2752 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2753 unsigned long arg)
2754 {
2755 struct snd_pcm_file *pcm_file;
2756
2757 pcm_file = file->private_data;
2758
2759 if (((cmd >> 8) & 0xff) != 'A')
2760 return -ENOTTY;
2761
2762 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2763 (void __user *)arg);
2764 }
2765
2766 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2767 unsigned long arg)
2768 {
2769 struct snd_pcm_file *pcm_file;
2770
2771 pcm_file = file->private_data;
2772
2773 if (((cmd >> 8) & 0xff) != 'A')
2774 return -ENOTTY;
2775
2776 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2777 (void __user *)arg);
2778 }
2779
2780 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2781 unsigned int cmd, void *arg)
2782 {
2783 mm_segment_t fs;
2784 int result;
2785
2786 fs = snd_enter_user();
2787 switch (substream->stream) {
2788 case SNDRV_PCM_STREAM_PLAYBACK:
2789 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2790 (void __user *)arg);
2791 break;
2792 case SNDRV_PCM_STREAM_CAPTURE:
2793 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2794 (void __user *)arg);
2795 break;
2796 default:
2797 result = -EINVAL;
2798 break;
2799 }
2800 snd_leave_user(fs);
2801 return result;
2802 }
2803
2804 EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2805
2806 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2807 loff_t * offset)
2808 {
2809 struct snd_pcm_file *pcm_file;
2810 struct snd_pcm_substream *substream;
2811 struct snd_pcm_runtime *runtime;
2812 snd_pcm_sframes_t result;
2813
2814 pcm_file = file->private_data;
2815 substream = pcm_file->substream;
2816 if (PCM_RUNTIME_CHECK(substream))
2817 return -ENXIO;
2818 runtime = substream->runtime;
2819 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2820 return -EBADFD;
2821 if (!frame_aligned(runtime, count))
2822 return -EINVAL;
2823 count = bytes_to_frames(runtime, count);
2824 result = snd_pcm_lib_read(substream, buf, count);
2825 if (result > 0)
2826 result = frames_to_bytes(runtime, result);
2827 return result;
2828 }
2829
2830 static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2831 size_t count, loff_t * offset)
2832 {
2833 struct snd_pcm_file *pcm_file;
2834 struct snd_pcm_substream *substream;
2835 struct snd_pcm_runtime *runtime;
2836 snd_pcm_sframes_t result;
2837
2838 pcm_file = file->private_data;
2839 substream = pcm_file->substream;
2840 if (PCM_RUNTIME_CHECK(substream))
2841 return -ENXIO;
2842 runtime = substream->runtime;
2843 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2844 return -EBADFD;
2845 if (!frame_aligned(runtime, count))
2846 return -EINVAL;
2847 count = bytes_to_frames(runtime, count);
2848 result = snd_pcm_lib_write(substream, buf, count);
2849 if (result > 0)
2850 result = frames_to_bytes(runtime, result);
2851 return result;
2852 }
2853
2854 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
2855 unsigned long nr_segs, loff_t pos)
2856
2857 {
2858 struct snd_pcm_file *pcm_file;
2859 struct snd_pcm_substream *substream;
2860 struct snd_pcm_runtime *runtime;
2861 snd_pcm_sframes_t result;
2862 unsigned long i;
2863 void __user **bufs;
2864 snd_pcm_uframes_t frames;
2865
2866 pcm_file = iocb->ki_filp->private_data;
2867 substream = pcm_file->substream;
2868 if (PCM_RUNTIME_CHECK(substream))
2869 return -ENXIO;
2870 runtime = substream->runtime;
2871 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2872 return -EBADFD;
2873 if (nr_segs > 1024 || nr_segs != runtime->channels)
2874 return -EINVAL;
2875 if (!frame_aligned(runtime, iov->iov_len))
2876 return -EINVAL;
2877 frames = bytes_to_samples(runtime, iov->iov_len);
2878 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2879 if (bufs == NULL)
2880 return -ENOMEM;
2881 for (i = 0; i < nr_segs; ++i)
2882 bufs[i] = iov[i].iov_base;
2883 result = snd_pcm_lib_readv(substream, bufs, frames);
2884 if (result > 0)
2885 result = frames_to_bytes(runtime, result);
2886 kfree(bufs);
2887 return result;
2888 }
2889
2890 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
2891 unsigned long nr_segs, loff_t pos)
2892 {
2893 struct snd_pcm_file *pcm_file;
2894 struct snd_pcm_substream *substream;
2895 struct snd_pcm_runtime *runtime;
2896 snd_pcm_sframes_t result;
2897 unsigned long i;
2898 void __user **bufs;
2899 snd_pcm_uframes_t frames;
2900
2901 pcm_file = iocb->ki_filp->private_data;
2902 substream = pcm_file->substream;
2903 if (PCM_RUNTIME_CHECK(substream))
2904 return -ENXIO;
2905 runtime = substream->runtime;
2906 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2907 return -EBADFD;
2908 if (nr_segs > 128 || nr_segs != runtime->channels ||
2909 !frame_aligned(runtime, iov->iov_len))
2910 return -EINVAL;
2911 frames = bytes_to_samples(runtime, iov->iov_len);
2912 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2913 if (bufs == NULL)
2914 return -ENOMEM;
2915 for (i = 0; i < nr_segs; ++i)
2916 bufs[i] = iov[i].iov_base;
2917 result = snd_pcm_lib_writev(substream, bufs, frames);
2918 if (result > 0)
2919 result = frames_to_bytes(runtime, result);
2920 kfree(bufs);
2921 return result;
2922 }
2923
2924 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2925 {
2926 struct snd_pcm_file *pcm_file;
2927 struct snd_pcm_substream *substream;
2928 struct snd_pcm_runtime *runtime;
2929 unsigned int mask;
2930 snd_pcm_uframes_t avail;
2931
2932 pcm_file = file->private_data;
2933
2934 substream = pcm_file->substream;
2935 if (PCM_RUNTIME_CHECK(substream))
2936 return -ENXIO;
2937 runtime = substream->runtime;
2938
2939 poll_wait(file, &runtime->sleep, wait);
2940
2941 snd_pcm_stream_lock_irq(substream);
2942 avail = snd_pcm_playback_avail(runtime);
2943 switch (runtime->status->state) {
2944 case SNDRV_PCM_STATE_RUNNING:
2945 case SNDRV_PCM_STATE_PREPARED:
2946 case SNDRV_PCM_STATE_PAUSED:
2947 if (avail >= runtime->control->avail_min) {
2948 mask = POLLOUT | POLLWRNORM;
2949 break;
2950 }
2951 /* Fall through */
2952 case SNDRV_PCM_STATE_DRAINING:
2953 mask = 0;
2954 break;
2955 default:
2956 mask = POLLOUT | POLLWRNORM | POLLERR;
2957 break;
2958 }
2959 snd_pcm_stream_unlock_irq(substream);
2960 return mask;
2961 }
2962
2963 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2964 {
2965 struct snd_pcm_file *pcm_file;
2966 struct snd_pcm_substream *substream;
2967 struct snd_pcm_runtime *runtime;
2968 unsigned int mask;
2969 snd_pcm_uframes_t avail;
2970
2971 pcm_file = file->private_data;
2972
2973 substream = pcm_file->substream;
2974 if (PCM_RUNTIME_CHECK(substream))
2975 return -ENXIO;
2976 runtime = substream->runtime;
2977
2978 poll_wait(file, &runtime->sleep, wait);
2979
2980 snd_pcm_stream_lock_irq(substream);
2981 avail = snd_pcm_capture_avail(runtime);
2982 switch (runtime->status->state) {
2983 case SNDRV_PCM_STATE_RUNNING:
2984 case SNDRV_PCM_STATE_PREPARED:
2985 case SNDRV_PCM_STATE_PAUSED:
2986 if (avail >= runtime->control->avail_min) {
2987 mask = POLLIN | POLLRDNORM;
2988 break;
2989 }
2990 mask = 0;
2991 break;
2992 case SNDRV_PCM_STATE_DRAINING:
2993 if (avail > 0) {
2994 mask = POLLIN | POLLRDNORM;
2995 break;
2996 }
2997 /* Fall through */
2998 default:
2999 mask = POLLIN | POLLRDNORM | POLLERR;
3000 break;
3001 }
3002 snd_pcm_stream_unlock_irq(substream);
3003 return mask;
3004 }
3005
3006 /*
3007 * mmap support
3008 */
3009
3010 /*
3011 * Only on coherent architectures, we can mmap the status and the control records
3012 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
3013 */
3014 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3015 /*
3016 * mmap status record
3017 */
3018 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
3019 struct vm_fault *vmf)
3020 {
3021 struct snd_pcm_substream *substream = area->vm_private_data;
3022 struct snd_pcm_runtime *runtime;
3023
3024 if (substream == NULL)
3025 return VM_FAULT_SIGBUS;
3026 runtime = substream->runtime;
3027 vmf->page = virt_to_page(runtime->status);
3028 get_page(vmf->page);
3029 return 0;
3030 }
3031
3032 static const struct vm_operations_struct snd_pcm_vm_ops_status =
3033 {
3034 .fault = snd_pcm_mmap_status_fault,
3035 };
3036
3037 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3038 struct vm_area_struct *area)
3039 {
3040 struct snd_pcm_runtime *runtime;
3041 long size;
3042 if (!(area->vm_flags & VM_READ))
3043 return -EINVAL;
3044 runtime = substream->runtime;
3045 size = area->vm_end - area->vm_start;
3046 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3047 return -EINVAL;
3048 area->vm_ops = &snd_pcm_vm_ops_status;
3049 area->vm_private_data = substream;
3050 area->vm_flags |= VM_RESERVED;
3051 return 0;
3052 }
3053
3054 /*
3055 * mmap control record
3056 */
3057 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3058 struct vm_fault *vmf)
3059 {
3060 struct snd_pcm_substream *substream = area->vm_private_data;
3061 struct snd_pcm_runtime *runtime;
3062
3063 if (substream == NULL)
3064 return VM_FAULT_SIGBUS;
3065 runtime = substream->runtime;
3066 vmf->page = virt_to_page(runtime->control);
3067 get_page(vmf->page);
3068 return 0;
3069 }
3070
3071 static const struct vm_operations_struct snd_pcm_vm_ops_control =
3072 {
3073 .fault = snd_pcm_mmap_control_fault,
3074 };
3075
3076 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3077 struct vm_area_struct *area)
3078 {
3079 struct snd_pcm_runtime *runtime;
3080 long size;
3081 if (!(area->vm_flags & VM_READ))
3082 return -EINVAL;
3083 runtime = substream->runtime;
3084 size = area->vm_end - area->vm_start;
3085 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3086 return -EINVAL;
3087 area->vm_ops = &snd_pcm_vm_ops_control;
3088 area->vm_private_data = substream;
3089 area->vm_flags |= VM_RESERVED;
3090 return 0;
3091 }
3092 #else /* ! coherent mmap */
3093 /*
3094 * don't support mmap for status and control records.
3095 */
3096 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3097 struct vm_area_struct *area)
3098 {
3099 return -ENXIO;
3100 }
3101 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3102 struct vm_area_struct *area)
3103 {
3104 return -ENXIO;
3105 }
3106 #endif /* coherent mmap */
3107
3108 static inline struct page *
3109 snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3110 {
3111 void *vaddr = substream->runtime->dma_area + ofs;
3112 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3113 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3114 return virt_to_page(CAC_ADDR(vaddr));
3115 #endif
3116 #if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE)
3117 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) {
3118 dma_addr_t addr = substream->runtime->dma_addr + ofs;
3119 addr -= get_dma_offset(substream->dma_buffer.dev.dev);
3120 /* assume dma_handle set via pfn_to_phys() in
3121 * mm/dma-noncoherent.c
3122 */
3123 return pfn_to_page(addr >> PAGE_SHIFT);
3124 }
3125 #endif
3126 return virt_to_page(vaddr);
3127 }
3128
3129 /*
3130 * fault callback for mmapping a RAM page
3131 */
3132 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3133 struct vm_fault *vmf)
3134 {
3135 struct snd_pcm_substream *substream = area->vm_private_data;
3136 struct snd_pcm_runtime *runtime;
3137 unsigned long offset;
3138 struct page * page;
3139 size_t dma_bytes;
3140
3141 if (substream == NULL)
3142 return VM_FAULT_SIGBUS;
3143 runtime = substream->runtime;
3144 offset = vmf->pgoff << PAGE_SHIFT;
3145 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3146 if (offset > dma_bytes - PAGE_SIZE)
3147 return VM_FAULT_SIGBUS;
3148 if (substream->ops->page)
3149 page = substream->ops->page(substream, offset);
3150 else
3151 page = snd_pcm_default_page_ops(substream, offset);
3152 if (!page)
3153 return VM_FAULT_SIGBUS;
3154 get_page(page);
3155 vmf->page = page;
3156 return 0;
3157 }
3158
3159 static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3160 .open = snd_pcm_mmap_data_open,
3161 .close = snd_pcm_mmap_data_close,
3162 };
3163
3164 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
3165 .open = snd_pcm_mmap_data_open,
3166 .close = snd_pcm_mmap_data_close,
3167 .fault = snd_pcm_mmap_data_fault,
3168 };
3169
3170 #ifndef ARCH_HAS_DMA_MMAP_COHERENT
3171 /* This should be defined / handled globally! */
3172 #ifdef CONFIG_ARM
3173 #define ARCH_HAS_DMA_MMAP_COHERENT
3174 #endif
3175 #endif
3176
3177 /*
3178 * mmap the DMA buffer on RAM
3179 */
3180 static int snd_pcm_default_mmap(struct snd_pcm_substream *substream,
3181 struct vm_area_struct *area)
3182 {
3183 area->vm_flags |= VM_RESERVED;
3184 #ifdef ARCH_HAS_DMA_MMAP_COHERENT
3185 if (!substream->ops->page &&
3186 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3187 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3188 area,
3189 substream->runtime->dma_area,
3190 substream->runtime->dma_addr,
3191 area->vm_end - area->vm_start);
3192 #elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3193 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV &&
3194 !plat_device_is_coherent(substream->dma_buffer.dev.dev))
3195 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3196 #endif /* ARCH_HAS_DMA_MMAP_COHERENT */
3197 /* mmap with fault handler */
3198 area->vm_ops = &snd_pcm_vm_ops_data_fault;
3199 return 0;
3200 }
3201
3202 /*
3203 * mmap the DMA buffer on I/O memory area
3204 */
3205 #if SNDRV_PCM_INFO_MMAP_IOMEM
3206 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3207 struct vm_area_struct *area)
3208 {
3209 long size;
3210 unsigned long offset;
3211
3212 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3213 area->vm_flags |= VM_IO;
3214 size = area->vm_end - area->vm_start;
3215 offset = area->vm_pgoff << PAGE_SHIFT;
3216 if (io_remap_pfn_range(area, area->vm_start,
3217 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3218 size, area->vm_page_prot))
3219 return -EAGAIN;
3220 return 0;
3221 }
3222
3223 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3224 #endif /* SNDRV_PCM_INFO_MMAP */
3225
3226 /* mmap callback with pgprot_noncached */
3227 int snd_pcm_lib_mmap_noncached(struct snd_pcm_substream *substream,
3228 struct vm_area_struct *area)
3229 {
3230 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3231 return snd_pcm_default_mmap(substream, area);
3232 }
3233 EXPORT_SYMBOL(snd_pcm_lib_mmap_noncached);
3234
3235 /*
3236 * mmap DMA buffer
3237 */
3238 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3239 struct vm_area_struct *area)
3240 {
3241 struct snd_pcm_runtime *runtime;
3242 long size;
3243 unsigned long offset;
3244 size_t dma_bytes;
3245 int err;
3246
3247 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3248 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3249 return -EINVAL;
3250 } else {
3251 if (!(area->vm_flags & VM_READ))
3252 return -EINVAL;
3253 }
3254 runtime = substream->runtime;
3255 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3256 return -EBADFD;
3257 if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3258 return -ENXIO;
3259 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3260 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3261 return -EINVAL;
3262 size = area->vm_end - area->vm_start;
3263 offset = area->vm_pgoff << PAGE_SHIFT;
3264 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3265 if ((size_t)size > dma_bytes)
3266 return -EINVAL;
3267 if (offset > dma_bytes - size)
3268 return -EINVAL;
3269
3270 area->vm_ops = &snd_pcm_vm_ops_data;
3271 area->vm_private_data = substream;
3272 if (substream->ops->mmap)
3273 err = substream->ops->mmap(substream, area);
3274 else
3275 err = snd_pcm_default_mmap(substream, area);
3276 if (!err)
3277 atomic_inc(&substream->mmap_count);
3278 return err;
3279 }
3280
3281 EXPORT_SYMBOL(snd_pcm_mmap_data);
3282
3283 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3284 {
3285 struct snd_pcm_file * pcm_file;
3286 struct snd_pcm_substream *substream;
3287 unsigned long offset;
3288
3289 pcm_file = file->private_data;
3290 substream = pcm_file->substream;
3291 if (PCM_RUNTIME_CHECK(substream))
3292 return -ENXIO;
3293
3294 offset = area->vm_pgoff << PAGE_SHIFT;
3295 switch (offset) {
3296 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3297 if (pcm_file->no_compat_mmap)
3298 return -ENXIO;
3299 return snd_pcm_mmap_status(substream, file, area);
3300 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3301 if (pcm_file->no_compat_mmap)
3302 return -ENXIO;
3303 return snd_pcm_mmap_control(substream, file, area);
3304 default:
3305 return snd_pcm_mmap_data(substream, file, area);
3306 }
3307 return 0;
3308 }
3309
3310 static int snd_pcm_fasync(int fd, struct file * file, int on)
3311 {
3312 struct snd_pcm_file * pcm_file;
3313 struct snd_pcm_substream *substream;
3314 struct snd_pcm_runtime *runtime;
3315 int err = -ENXIO;
3316
3317 lock_kernel();
3318 pcm_file = file->private_data;
3319 substream = pcm_file->substream;
3320 if (PCM_RUNTIME_CHECK(substream))
3321 goto out;
3322 runtime = substream->runtime;
3323 err = fasync_helper(fd, file, on, &runtime->fasync);
3324 out:
3325 unlock_kernel();
3326 return err;
3327 }
3328
3329 /*
3330 * ioctl32 compat
3331 */
3332 #ifdef CONFIG_COMPAT
3333 #include "pcm_compat.c"
3334 #else
3335 #define snd_pcm_ioctl_compat NULL
3336 #endif
3337
3338 /*
3339 * To be removed helpers to keep binary compatibility
3340 */
3341
3342 #ifdef CONFIG_SND_SUPPORT_OLD_API
3343 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3344 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3345
3346 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3347 struct snd_pcm_hw_params_old *oparams)
3348 {
3349 unsigned int i;
3350
3351 memset(params, 0, sizeof(*params));
3352 params->flags = oparams->flags;
3353 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3354 params->masks[i].bits[0] = oparams->masks[i];
3355 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3356 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3357 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3358 params->info = oparams->info;
3359 params->msbits = oparams->msbits;
3360 params->rate_num = oparams->rate_num;
3361 params->rate_den = oparams->rate_den;
3362 params->fifo_size = oparams->fifo_size;
3363 }
3364
3365 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3366 struct snd_pcm_hw_params *params)
3367 {
3368 unsigned int i;
3369
3370 memset(oparams, 0, sizeof(*oparams));
3371 oparams->flags = params->flags;
3372 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3373 oparams->masks[i] = params->masks[i].bits[0];
3374 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3375 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3376 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3377 oparams->info = params->info;
3378 oparams->msbits = params->msbits;
3379 oparams->rate_num = params->rate_num;
3380 oparams->rate_den = params->rate_den;
3381 oparams->fifo_size = params->fifo_size;
3382 }
3383
3384 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3385 struct snd_pcm_hw_params_old __user * _oparams)
3386 {
3387 struct snd_pcm_hw_params *params;
3388 struct snd_pcm_hw_params_old *oparams = NULL;
3389 int err;
3390
3391 params = kmalloc(sizeof(*params), GFP_KERNEL);
3392 if (!params)
3393 return -ENOMEM;
3394
3395 oparams = memdup_user(_oparams, sizeof(*oparams));
3396 if (IS_ERR(oparams)) {
3397 err = PTR_ERR(oparams);
3398 goto out;
3399 }
3400 snd_pcm_hw_convert_from_old_params(params, oparams);
3401 err = snd_pcm_hw_refine(substream, params);
3402 snd_pcm_hw_convert_to_old_params(oparams, params);
3403 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3404 if (!err)
3405 err = -EFAULT;
3406 }
3407
3408 kfree(oparams);
3409 out:
3410 kfree(params);
3411 return err;
3412 }
3413
3414 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3415 struct snd_pcm_hw_params_old __user * _oparams)
3416 {
3417 struct snd_pcm_hw_params *params;
3418 struct snd_pcm_hw_params_old *oparams = NULL;
3419 int err;
3420
3421 params = kmalloc(sizeof(*params), GFP_KERNEL);
3422 if (!params)
3423 return -ENOMEM;
3424
3425 oparams = memdup_user(_oparams, sizeof(*oparams));
3426 if (IS_ERR(oparams)) {
3427 err = PTR_ERR(oparams);
3428 goto out;
3429 }
3430 snd_pcm_hw_convert_from_old_params(params, oparams);
3431 err = snd_pcm_hw_params(substream, params);
3432 snd_pcm_hw_convert_to_old_params(oparams, params);
3433 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3434 if (!err)
3435 err = -EFAULT;
3436 }
3437
3438 kfree(oparams);
3439 out:
3440 kfree(params);
3441 return err;
3442 }
3443 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3444
3445 #ifndef CONFIG_MMU
3446 unsigned long dummy_get_unmapped_area(struct file *file, unsigned long addr,
3447 unsigned long len, unsigned long pgoff,
3448 unsigned long flags)
3449 {
3450 return 0;
3451 }
3452 #else
3453 # define dummy_get_unmapped_area NULL
3454 #endif
3455
3456 /*
3457 * Register section
3458 */
3459
3460 const struct file_operations snd_pcm_f_ops[2] = {
3461 {
3462 .owner = THIS_MODULE,
3463 .write = snd_pcm_write,
3464 .aio_write = snd_pcm_aio_write,
3465 .open = snd_pcm_playback_open,
3466 .release = snd_pcm_release,
3467 .poll = snd_pcm_playback_poll,
3468 .unlocked_ioctl = snd_pcm_playback_ioctl,
3469 .compat_ioctl = snd_pcm_ioctl_compat,
3470 .mmap = snd_pcm_mmap,
3471 .fasync = snd_pcm_fasync,
3472 .get_unmapped_area = dummy_get_unmapped_area,
3473 },
3474 {
3475 .owner = THIS_MODULE,
3476 .read = snd_pcm_read,
3477 .aio_read = snd_pcm_aio_read,
3478 .open = snd_pcm_capture_open,
3479 .release = snd_pcm_release,
3480 .poll = snd_pcm_capture_poll,
3481 .unlocked_ioctl = snd_pcm_capture_ioctl,
3482 .compat_ioctl = snd_pcm_ioctl_compat,
3483 .mmap = snd_pcm_mmap,
3484 .fasync = snd_pcm_fasync,
3485 .get_unmapped_area = dummy_get_unmapped_area,
3486 }
3487 };