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USB: usb-storage: unusual_devs update for Super TOP SATA bridge
[linux/fpc-iii.git] / sound / core / pcm_native.c
blobd535b341aa8276a523b879c7f4960cb3c9a557fc
1 /*
2 * Digital Audio (PCM) abstract layer
3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
22 #include <linux/mm.h>
23 #include <linux/module.h>
24 #include <linux/file.h>
25 #include <linux/slab.h>
26 #include <linux/time.h>
27 #include <linux/pm_qos.h>
28 #include <linux/uio.h>
29 #include <linux/dma-mapping.h>
30 #include <sound/core.h>
31 #include <sound/control.h>
32 #include <sound/info.h>
33 #include <sound/pcm.h>
34 #include <sound/pcm_params.h>
35 #include <sound/timer.h>
36 #include <sound/minors.h>
37 #include <asm/io.h>
38 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
39 #include <dma-coherence.h>
40 #endif
41
42 /*
43 * Compatibility
44 */
45
46 struct snd_pcm_hw_params_old {
47 unsigned int flags;
48 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
49 SNDRV_PCM_HW_PARAM_ACCESS + 1];
50 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
51 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
52 unsigned int rmask;
53 unsigned int cmask;
54 unsigned int info;
55 unsigned int msbits;
56 unsigned int rate_num;
57 unsigned int rate_den;
58 snd_pcm_uframes_t fifo_size;
59 unsigned char reserved[64];
60 };
61
62 #ifdef CONFIG_SND_SUPPORT_OLD_API
63 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
64 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
65
66 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
67 struct snd_pcm_hw_params_old __user * _oparams);
68 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
69 struct snd_pcm_hw_params_old __user * _oparams);
70 #endif
71 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
72
73 /*
74 *
75 */
76
77 DEFINE_RWLOCK(snd_pcm_link_rwlock);
78 EXPORT_SYMBOL(snd_pcm_link_rwlock);
79
80 static DECLARE_RWSEM(snd_pcm_link_rwsem);
81
82 static inline mm_segment_t snd_enter_user(void)
83 {
84 mm_segment_t fs = get_fs();
85 set_fs(get_ds());
86 return fs;
87 }
88
89 static inline void snd_leave_user(mm_segment_t fs)
90 {
91 set_fs(fs);
92 }
93
94
95
96 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
97 {
98 struct snd_pcm_runtime *runtime;
99 struct snd_pcm *pcm = substream->pcm;
100 struct snd_pcm_str *pstr = substream->pstr;
101
102 memset(info, 0, sizeof(*info));
103 info->card = pcm->card->number;
104 info->device = pcm->device;
105 info->stream = substream->stream;
106 info->subdevice = substream->number;
107 strlcpy(info->id, pcm->id, sizeof(info->id));
108 strlcpy(info->name, pcm->name, sizeof(info->name));
109 info->dev_class = pcm->dev_class;
110 info->dev_subclass = pcm->dev_subclass;
111 info->subdevices_count = pstr->substream_count;
112 info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
113 strlcpy(info->subname, substream->name, sizeof(info->subname));
114 runtime = substream->runtime;
115 /* AB: FIXME!!! This is definitely nonsense */
116 if (runtime) {
117 info->sync = runtime->sync;
118 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
119 }
120 return 0;
121 }
122
123 int snd_pcm_info_user(struct snd_pcm_substream *substream,
124 struct snd_pcm_info __user * _info)
125 {
126 struct snd_pcm_info *info;
127 int err;
128
129 info = kmalloc(sizeof(*info), GFP_KERNEL);
130 if (! info)
131 return -ENOMEM;
132 err = snd_pcm_info(substream, info);
133 if (err >= 0) {
134 if (copy_to_user(_info, info, sizeof(*info)))
135 err = -EFAULT;
136 }
137 kfree(info);
138 return err;
139 }
140
141 #undef RULES_DEBUG
142
143 #ifdef RULES_DEBUG
144 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
145 static const char * const snd_pcm_hw_param_names[] = {
146 HW_PARAM(ACCESS),
147 HW_PARAM(FORMAT),
148 HW_PARAM(SUBFORMAT),
149 HW_PARAM(SAMPLE_BITS),
150 HW_PARAM(FRAME_BITS),
151 HW_PARAM(CHANNELS),
152 HW_PARAM(RATE),
153 HW_PARAM(PERIOD_TIME),
154 HW_PARAM(PERIOD_SIZE),
155 HW_PARAM(PERIOD_BYTES),
156 HW_PARAM(PERIODS),
157 HW_PARAM(BUFFER_TIME),
158 HW_PARAM(BUFFER_SIZE),
159 HW_PARAM(BUFFER_BYTES),
160 HW_PARAM(TICK_TIME),
161 };
162 #endif
163
164 int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
165 struct snd_pcm_hw_params *params)
166 {
167 unsigned int k;
168 struct snd_pcm_hardware *hw;
169 struct snd_interval *i = NULL;
170 struct snd_mask *m = NULL;
171 struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
172 unsigned int rstamps[constrs->rules_num];
173 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
174 unsigned int stamp = 2;
175 int changed, again;
176
177 params->info = 0;
178 params->fifo_size = 0;
179 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
180 params->msbits = 0;
181 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
182 params->rate_num = 0;
183 params->rate_den = 0;
184 }
185
186 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
187 m = hw_param_mask(params, k);
188 if (snd_mask_empty(m))
189 return -EINVAL;
190 if (!(params->rmask & (1 << k)))
191 continue;
192 #ifdef RULES_DEBUG
193 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
194 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
195 #endif
196 changed = snd_mask_refine(m, constrs_mask(constrs, k));
197 #ifdef RULES_DEBUG
198 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
199 #endif
200 if (changed)
201 params->cmask |= 1 << k;
202 if (changed < 0)
203 return changed;
204 }
205
206 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
207 i = hw_param_interval(params, k);
208 if (snd_interval_empty(i))
209 return -EINVAL;
210 if (!(params->rmask & (1 << k)))
211 continue;
212 #ifdef RULES_DEBUG
213 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
214 if (i->empty)
215 printk("empty");
216 else
217 printk("%c%u %u%c",
218 i->openmin ? '(' : '[', i->min,
219 i->max, i->openmax ? ')' : ']');
220 printk(" -> ");
221 #endif
222 changed = snd_interval_refine(i, constrs_interval(constrs, k));
223 #ifdef RULES_DEBUG
224 if (i->empty)
225 printk("empty\n");
226 else
227 printk("%c%u %u%c\n",
228 i->openmin ? '(' : '[', i->min,
229 i->max, i->openmax ? ')' : ']');
230 #endif
231 if (changed)
232 params->cmask |= 1 << k;
233 if (changed < 0)
234 return changed;
235 }
236
237 for (k = 0; k < constrs->rules_num; k++)
238 rstamps[k] = 0;
239 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
240 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
241 do {
242 again = 0;
243 for (k = 0; k < constrs->rules_num; k++) {
244 struct snd_pcm_hw_rule *r = &constrs->rules[k];
245 unsigned int d;
246 int doit = 0;
247 if (r->cond && !(r->cond & params->flags))
248 continue;
249 for (d = 0; r->deps[d] >= 0; d++) {
250 if (vstamps[r->deps[d]] > rstamps[k]) {
251 doit = 1;
252 break;
253 }
254 }
255 if (!doit)
256 continue;
257 #ifdef RULES_DEBUG
258 printk(KERN_DEBUG "Rule %d [%p]: ", k, r->func);
259 if (r->var >= 0) {
260 printk("%s = ", snd_pcm_hw_param_names[r->var]);
261 if (hw_is_mask(r->var)) {
262 m = hw_param_mask(params, r->var);
263 printk("%x", *m->bits);
264 } else {
265 i = hw_param_interval(params, r->var);
266 if (i->empty)
267 printk("empty");
268 else
269 printk("%c%u %u%c",
270 i->openmin ? '(' : '[', i->min,
271 i->max, i->openmax ? ')' : ']');
272 }
273 }
274 #endif
275 changed = r->func(params, r);
276 #ifdef RULES_DEBUG
277 if (r->var >= 0) {
278 printk(" -> ");
279 if (hw_is_mask(r->var))
280 printk("%x", *m->bits);
281 else {
282 if (i->empty)
283 printk("empty");
284 else
285 printk("%c%u %u%c",
286 i->openmin ? '(' : '[', i->min,
287 i->max, i->openmax ? ')' : ']');
288 }
289 }
290 printk("\n");
291 #endif
292 rstamps[k] = stamp;
293 if (changed && r->var >= 0) {
294 params->cmask |= (1 << r->var);
295 vstamps[r->var] = stamp;
296 again = 1;
297 }
298 if (changed < 0)
299 return changed;
300 stamp++;
301 }
302 } while (again);
303 if (!params->msbits) {
304 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
305 if (snd_interval_single(i))
306 params->msbits = snd_interval_value(i);
307 }
308
309 if (!params->rate_den) {
310 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
311 if (snd_interval_single(i)) {
312 params->rate_num = snd_interval_value(i);
313 params->rate_den = 1;
314 }
315 }
316
317 hw = &substream->runtime->hw;
318 if (!params->info)
319 params->info = hw->info & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES;
320 if (!params->fifo_size) {
321 m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
322 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
323 if (snd_mask_min(m) == snd_mask_max(m) &&
324 snd_interval_min(i) == snd_interval_max(i)) {
325 changed = substream->ops->ioctl(substream,
326 SNDRV_PCM_IOCTL1_FIFO_SIZE, params);
327 if (changed < 0)
328 return changed;
329 }
330 }
331 params->rmask = 0;
332 return 0;
333 }
334
335 EXPORT_SYMBOL(snd_pcm_hw_refine);
336
337 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
338 struct snd_pcm_hw_params __user * _params)
339 {
340 struct snd_pcm_hw_params *params;
341 int err;
342
343 params = memdup_user(_params, sizeof(*params));
344 if (IS_ERR(params))
345 return PTR_ERR(params);
346
347 err = snd_pcm_hw_refine(substream, params);
348 if (copy_to_user(_params, params, sizeof(*params))) {
349 if (!err)
350 err = -EFAULT;
351 }
352
353 kfree(params);
354 return err;
355 }
356
357 static int period_to_usecs(struct snd_pcm_runtime *runtime)
358 {
359 int usecs;
360
361 if (! runtime->rate)
362 return -1; /* invalid */
363
364 /* take 75% of period time as the deadline */
365 usecs = (750000 / runtime->rate) * runtime->period_size;
366 usecs += ((750000 % runtime->rate) * runtime->period_size) /
367 runtime->rate;
368
369 return usecs;
370 }
371
372 static void snd_pcm_set_state(struct snd_pcm_substream *substream, int state)
373 {
374 snd_pcm_stream_lock_irq(substream);
375 if (substream->runtime->status->state != SNDRV_PCM_STATE_DISCONNECTED)
376 substream->runtime->status->state = state;
377 snd_pcm_stream_unlock_irq(substream);
378 }
379
380 static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
381 struct snd_pcm_hw_params *params)
382 {
383 struct snd_pcm_runtime *runtime;
384 int err, usecs;
385 unsigned int bits;
386 snd_pcm_uframes_t frames;
387
388 if (PCM_RUNTIME_CHECK(substream))
389 return -ENXIO;
390 runtime = substream->runtime;
391 snd_pcm_stream_lock_irq(substream);
392 switch (runtime->status->state) {
393 case SNDRV_PCM_STATE_OPEN:
394 case SNDRV_PCM_STATE_SETUP:
395 case SNDRV_PCM_STATE_PREPARED:
396 break;
397 default:
398 snd_pcm_stream_unlock_irq(substream);
399 return -EBADFD;
400 }
401 snd_pcm_stream_unlock_irq(substream);
402 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
403 if (!substream->oss.oss)
404 #endif
405 if (atomic_read(&substream->mmap_count))
406 return -EBADFD;
407
408 params->rmask = ~0U;
409 err = snd_pcm_hw_refine(substream, params);
410 if (err < 0)
411 goto _error;
412
413 err = snd_pcm_hw_params_choose(substream, params);
414 if (err < 0)
415 goto _error;
416
417 if (substream->ops->hw_params != NULL) {
418 err = substream->ops->hw_params(substream, params);
419 if (err < 0)
420 goto _error;
421 }
422
423 runtime->access = params_access(params);
424 runtime->format = params_format(params);
425 runtime->subformat = params_subformat(params);
426 runtime->channels = params_channels(params);
427 runtime->rate = params_rate(params);
428 runtime->period_size = params_period_size(params);
429 runtime->periods = params_periods(params);
430 runtime->buffer_size = params_buffer_size(params);
431 runtime->info = params->info;
432 runtime->rate_num = params->rate_num;
433 runtime->rate_den = params->rate_den;
434 runtime->no_period_wakeup =
435 (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) &&
436 (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP);
437
438 bits = snd_pcm_format_physical_width(runtime->format);
439 runtime->sample_bits = bits;
440 bits *= runtime->channels;
441 runtime->frame_bits = bits;
442 frames = 1;
443 while (bits % 8 != 0) {
444 bits *= 2;
445 frames *= 2;
446 }
447 runtime->byte_align = bits / 8;
448 runtime->min_align = frames;
449
450 /* Default sw params */
451 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
452 runtime->period_step = 1;
453 runtime->control->avail_min = runtime->period_size;
454 runtime->start_threshold = 1;
455 runtime->stop_threshold = runtime->buffer_size;
456 runtime->silence_threshold = 0;
457 runtime->silence_size = 0;
458 runtime->boundary = runtime->buffer_size;
459 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
460 runtime->boundary *= 2;
461
462 snd_pcm_timer_resolution_change(substream);
463 snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP);
464
465 if (pm_qos_request_active(&substream->latency_pm_qos_req))
466 pm_qos_remove_request(&substream->latency_pm_qos_req);
467 if ((usecs = period_to_usecs(runtime)) >= 0)
468 pm_qos_add_request(&substream->latency_pm_qos_req,
469 PM_QOS_CPU_DMA_LATENCY, usecs);
470 return 0;
471 _error:
472 /* hardware might be unusable from this time,
473 so we force application to retry to set
474 the correct hardware parameter settings */
475 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
476 if (substream->ops->hw_free != NULL)
477 substream->ops->hw_free(substream);
478 return err;
479 }
480
481 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
482 struct snd_pcm_hw_params __user * _params)
483 {
484 struct snd_pcm_hw_params *params;
485 int err;
486
487 params = memdup_user(_params, sizeof(*params));
488 if (IS_ERR(params))
489 return PTR_ERR(params);
490
491 err = snd_pcm_hw_params(substream, params);
492 if (copy_to_user(_params, params, sizeof(*params))) {
493 if (!err)
494 err = -EFAULT;
495 }
496
497 kfree(params);
498 return err;
499 }
500
501 static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
502 {
503 struct snd_pcm_runtime *runtime;
504 int result = 0;
505
506 if (PCM_RUNTIME_CHECK(substream))
507 return -ENXIO;
508 runtime = substream->runtime;
509 snd_pcm_stream_lock_irq(substream);
510 switch (runtime->status->state) {
511 case SNDRV_PCM_STATE_SETUP:
512 case SNDRV_PCM_STATE_PREPARED:
513 break;
514 default:
515 snd_pcm_stream_unlock_irq(substream);
516 return -EBADFD;
517 }
518 snd_pcm_stream_unlock_irq(substream);
519 if (atomic_read(&substream->mmap_count))
520 return -EBADFD;
521 if (substream->ops->hw_free)
522 result = substream->ops->hw_free(substream);
523 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
524 pm_qos_remove_request(&substream->latency_pm_qos_req);
525 return result;
526 }
527
528 static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
529 struct snd_pcm_sw_params *params)
530 {
531 struct snd_pcm_runtime *runtime;
532 int err;
533
534 if (PCM_RUNTIME_CHECK(substream))
535 return -ENXIO;
536 runtime = substream->runtime;
537 snd_pcm_stream_lock_irq(substream);
538 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
539 snd_pcm_stream_unlock_irq(substream);
540 return -EBADFD;
541 }
542 snd_pcm_stream_unlock_irq(substream);
543
544 if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
545 return -EINVAL;
546 if (params->avail_min == 0)
547 return -EINVAL;
548 if (params->silence_size >= runtime->boundary) {
549 if (params->silence_threshold != 0)
550 return -EINVAL;
551 } else {
552 if (params->silence_size > params->silence_threshold)
553 return -EINVAL;
554 if (params->silence_threshold > runtime->buffer_size)
555 return -EINVAL;
556 }
557 err = 0;
558 snd_pcm_stream_lock_irq(substream);
559 runtime->tstamp_mode = params->tstamp_mode;
560 runtime->period_step = params->period_step;
561 runtime->control->avail_min = params->avail_min;
562 runtime->start_threshold = params->start_threshold;
563 runtime->stop_threshold = params->stop_threshold;
564 runtime->silence_threshold = params->silence_threshold;
565 runtime->silence_size = params->silence_size;
566 params->boundary = runtime->boundary;
567 if (snd_pcm_running(substream)) {
568 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
569 runtime->silence_size > 0)
570 snd_pcm_playback_silence(substream, ULONG_MAX);
571 err = snd_pcm_update_state(substream, runtime);
572 }
573 snd_pcm_stream_unlock_irq(substream);
574 return err;
575 }
576
577 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
578 struct snd_pcm_sw_params __user * _params)
579 {
580 struct snd_pcm_sw_params params;
581 int err;
582 if (copy_from_user(&params, _params, sizeof(params)))
583 return -EFAULT;
584 err = snd_pcm_sw_params(substream, &params);
585 if (copy_to_user(_params, &params, sizeof(params)))
586 return -EFAULT;
587 return err;
588 }
589
590 int snd_pcm_status(struct snd_pcm_substream *substream,
591 struct snd_pcm_status *status)
592 {
593 struct snd_pcm_runtime *runtime = substream->runtime;
594
595 snd_pcm_stream_lock_irq(substream);
596 status->state = runtime->status->state;
597 status->suspended_state = runtime->status->suspended_state;
598 if (status->state == SNDRV_PCM_STATE_OPEN)
599 goto _end;
600 status->trigger_tstamp = runtime->trigger_tstamp;
601 if (snd_pcm_running(substream)) {
602 snd_pcm_update_hw_ptr(substream);
603 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
604 status->tstamp = runtime->status->tstamp;
605 goto _tstamp_end;
606 }
607 }
608 snd_pcm_gettime(runtime, &status->tstamp);
609 _tstamp_end:
610 status->appl_ptr = runtime->control->appl_ptr;
611 status->hw_ptr = runtime->status->hw_ptr;
612 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
613 status->avail = snd_pcm_playback_avail(runtime);
614 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
615 runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
616 status->delay = runtime->buffer_size - status->avail;
617 status->delay += runtime->delay;
618 } else
619 status->delay = 0;
620 } else {
621 status->avail = snd_pcm_capture_avail(runtime);
622 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
623 status->delay = status->avail + runtime->delay;
624 else
625 status->delay = 0;
626 }
627 status->avail_max = runtime->avail_max;
628 status->overrange = runtime->overrange;
629 runtime->avail_max = 0;
630 runtime->overrange = 0;
631 _end:
632 snd_pcm_stream_unlock_irq(substream);
633 return 0;
634 }
635
636 static int snd_pcm_status_user(struct snd_pcm_substream *substream,
637 struct snd_pcm_status __user * _status)
638 {
639 struct snd_pcm_status status;
640 int res;
641
642 memset(&status, 0, sizeof(status));
643 res = snd_pcm_status(substream, &status);
644 if (res < 0)
645 return res;
646 if (copy_to_user(_status, &status, sizeof(status)))
647 return -EFAULT;
648 return 0;
649 }
650
651 static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
652 struct snd_pcm_channel_info * info)
653 {
654 struct snd_pcm_runtime *runtime;
655 unsigned int channel;
656
657 channel = info->channel;
658 runtime = substream->runtime;
659 snd_pcm_stream_lock_irq(substream);
660 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
661 snd_pcm_stream_unlock_irq(substream);
662 return -EBADFD;
663 }
664 snd_pcm_stream_unlock_irq(substream);
665 if (channel >= runtime->channels)
666 return -EINVAL;
667 memset(info, 0, sizeof(*info));
668 info->channel = channel;
669 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
670 }
671
672 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
673 struct snd_pcm_channel_info __user * _info)
674 {
675 struct snd_pcm_channel_info info;
676 int res;
677
678 if (copy_from_user(&info, _info, sizeof(info)))
679 return -EFAULT;
680 res = snd_pcm_channel_info(substream, &info);
681 if (res < 0)
682 return res;
683 if (copy_to_user(_info, &info, sizeof(info)))
684 return -EFAULT;
685 return 0;
686 }
687
688 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
689 {
690 struct snd_pcm_runtime *runtime = substream->runtime;
691 if (runtime->trigger_master == NULL)
692 return;
693 if (runtime->trigger_master == substream) {
694 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
695 } else {
696 snd_pcm_trigger_tstamp(runtime->trigger_master);
697 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
698 }
699 runtime->trigger_master = NULL;
700 }
701
702 struct action_ops {
703 int (*pre_action)(struct snd_pcm_substream *substream, int state);
704 int (*do_action)(struct snd_pcm_substream *substream, int state);
705 void (*undo_action)(struct snd_pcm_substream *substream, int state);
706 void (*post_action)(struct snd_pcm_substream *substream, int state);
707 };
708
709 /*
710 * this functions is core for handling of linked stream
711 * Note: the stream state might be changed also on failure
712 * Note2: call with calling stream lock + link lock
713 */
714 static int snd_pcm_action_group(struct action_ops *ops,
715 struct snd_pcm_substream *substream,
716 int state, int do_lock)
717 {
718 struct snd_pcm_substream *s = NULL;
719 struct snd_pcm_substream *s1;
720 int res = 0;
721
722 snd_pcm_group_for_each_entry(s, substream) {
723 if (do_lock && s != substream)
724 spin_lock_nested(&s->self_group.lock,
725 SINGLE_DEPTH_NESTING);
726 res = ops->pre_action(s, state);
727 if (res < 0)
728 goto _unlock;
729 }
730 snd_pcm_group_for_each_entry(s, substream) {
731 res = ops->do_action(s, state);
732 if (res < 0) {
733 if (ops->undo_action) {
734 snd_pcm_group_for_each_entry(s1, substream) {
735 if (s1 == s) /* failed stream */
736 break;
737 ops->undo_action(s1, state);
738 }
739 }
740 s = NULL; /* unlock all */
741 goto _unlock;
742 }
743 }
744 snd_pcm_group_for_each_entry(s, substream) {
745 ops->post_action(s, state);
746 }
747 _unlock:
748 if (do_lock) {
749 /* unlock streams */
750 snd_pcm_group_for_each_entry(s1, substream) {
751 if (s1 != substream)
752 spin_unlock(&s1->self_group.lock);
753 if (s1 == s) /* end */
754 break;
755 }
756 }
757 return res;
758 }
759
760 /*
761 * Note: call with stream lock
762 */
763 static int snd_pcm_action_single(struct action_ops *ops,
764 struct snd_pcm_substream *substream,
765 int state)
766 {
767 int res;
768
769 res = ops->pre_action(substream, state);
770 if (res < 0)
771 return res;
772 res = ops->do_action(substream, state);
773 if (res == 0)
774 ops->post_action(substream, state);
775 else if (ops->undo_action)
776 ops->undo_action(substream, state);
777 return res;
778 }
779
780 /*
781 * Note: call with stream lock
782 */
783 static int snd_pcm_action(struct action_ops *ops,
784 struct snd_pcm_substream *substream,
785 int state)
786 {
787 int res;
788
789 if (snd_pcm_stream_linked(substream)) {
790 if (!spin_trylock(&substream->group->lock)) {
791 spin_unlock(&substream->self_group.lock);
792 spin_lock(&substream->group->lock);
793 spin_lock(&substream->self_group.lock);
794 }
795 res = snd_pcm_action_group(ops, substream, state, 1);
796 spin_unlock(&substream->group->lock);
797 } else {
798 res = snd_pcm_action_single(ops, substream, state);
799 }
800 return res;
801 }
802
803 /*
804 * Note: don't use any locks before
805 */
806 static int snd_pcm_action_lock_irq(struct action_ops *ops,
807 struct snd_pcm_substream *substream,
808 int state)
809 {
810 int res;
811
812 read_lock_irq(&snd_pcm_link_rwlock);
813 if (snd_pcm_stream_linked(substream)) {
814 spin_lock(&substream->group->lock);
815 spin_lock(&substream->self_group.lock);
816 res = snd_pcm_action_group(ops, substream, state, 1);
817 spin_unlock(&substream->self_group.lock);
818 spin_unlock(&substream->group->lock);
819 } else {
820 spin_lock(&substream->self_group.lock);
821 res = snd_pcm_action_single(ops, substream, state);
822 spin_unlock(&substream->self_group.lock);
823 }
824 read_unlock_irq(&snd_pcm_link_rwlock);
825 return res;
826 }
827
828 /*
829 */
830 static int snd_pcm_action_nonatomic(struct action_ops *ops,
831 struct snd_pcm_substream *substream,
832 int state)
833 {
834 int res;
835
836 down_read(&snd_pcm_link_rwsem);
837 if (snd_pcm_stream_linked(substream))
838 res = snd_pcm_action_group(ops, substream, state, 0);
839 else
840 res = snd_pcm_action_single(ops, substream, state);
841 up_read(&snd_pcm_link_rwsem);
842 return res;
843 }
844
845 /*
846 * start callbacks
847 */
848 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
849 {
850 struct snd_pcm_runtime *runtime = substream->runtime;
851 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
852 return -EBADFD;
853 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
854 !snd_pcm_playback_data(substream))
855 return -EPIPE;
856 runtime->trigger_master = substream;
857 return 0;
858 }
859
860 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
861 {
862 if (substream->runtime->trigger_master != substream)
863 return 0;
864 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
865 }
866
867 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
868 {
869 if (substream->runtime->trigger_master == substream)
870 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
871 }
872
873 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
874 {
875 struct snd_pcm_runtime *runtime = substream->runtime;
876 snd_pcm_trigger_tstamp(substream);
877 runtime->hw_ptr_jiffies = jiffies;
878 runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) /
879 runtime->rate;
880 runtime->status->state = state;
881 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
882 runtime->silence_size > 0)
883 snd_pcm_playback_silence(substream, ULONG_MAX);
884 if (substream->timer)
885 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
886 &runtime->trigger_tstamp);
887 }
888
889 static struct action_ops snd_pcm_action_start = {
890 .pre_action = snd_pcm_pre_start,
891 .do_action = snd_pcm_do_start,
892 .undo_action = snd_pcm_undo_start,
893 .post_action = snd_pcm_post_start
894 };
895
896 /**
897 * snd_pcm_start - start all linked streams
898 * @substream: the PCM substream instance
899 */
900 int snd_pcm_start(struct snd_pcm_substream *substream)
901 {
902 return snd_pcm_action(&snd_pcm_action_start, substream,
903 SNDRV_PCM_STATE_RUNNING);
904 }
905
906 /*
907 * stop callbacks
908 */
909 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
910 {
911 struct snd_pcm_runtime *runtime = substream->runtime;
912 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
913 return -EBADFD;
914 runtime->trigger_master = substream;
915 return 0;
916 }
917
918 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
919 {
920 if (substream->runtime->trigger_master == substream &&
921 snd_pcm_running(substream))
922 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
923 return 0; /* unconditonally stop all substreams */
924 }
925
926 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
927 {
928 struct snd_pcm_runtime *runtime = substream->runtime;
929 if (runtime->status->state != state) {
930 snd_pcm_trigger_tstamp(substream);
931 if (substream->timer)
932 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
933 &runtime->trigger_tstamp);
934 runtime->status->state = state;
935 }
936 wake_up(&runtime->sleep);
937 wake_up(&runtime->tsleep);
938 }
939
940 static struct action_ops snd_pcm_action_stop = {
941 .pre_action = snd_pcm_pre_stop,
942 .do_action = snd_pcm_do_stop,
943 .post_action = snd_pcm_post_stop
944 };
945
946 /**
947 * snd_pcm_stop - try to stop all running streams in the substream group
948 * @substream: the PCM substream instance
949 * @state: PCM state after stopping the stream
950 *
951 * The state of each stream is then changed to the given state unconditionally.
952 */
953 int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state)
954 {
955 return snd_pcm_action(&snd_pcm_action_stop, substream, state);
956 }
957
958 EXPORT_SYMBOL(snd_pcm_stop);
959
960 /**
961 * snd_pcm_drain_done - stop the DMA only when the given stream is playback
962 * @substream: the PCM substream
963 *
964 * After stopping, the state is changed to SETUP.
965 * Unlike snd_pcm_stop(), this affects only the given stream.
966 */
967 int snd_pcm_drain_done(struct snd_pcm_substream *substream)
968 {
969 return snd_pcm_action_single(&snd_pcm_action_stop, substream,
970 SNDRV_PCM_STATE_SETUP);
971 }
972
973 /*
974 * pause callbacks
975 */
976 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
977 {
978 struct snd_pcm_runtime *runtime = substream->runtime;
979 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
980 return -ENOSYS;
981 if (push) {
982 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
983 return -EBADFD;
984 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
985 return -EBADFD;
986 runtime->trigger_master = substream;
987 return 0;
988 }
989
990 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
991 {
992 if (substream->runtime->trigger_master != substream)
993 return 0;
994 /* some drivers might use hw_ptr to recover from the pause -
995 update the hw_ptr now */
996 if (push)
997 snd_pcm_update_hw_ptr(substream);
998 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
999 * a delta between the current jiffies, this gives a large enough
1000 * delta, effectively to skip the check once.
1001 */
1002 substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
1003 return substream->ops->trigger(substream,
1004 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
1005 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
1006 }
1007
1008 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
1009 {
1010 if (substream->runtime->trigger_master == substream)
1011 substream->ops->trigger(substream,
1012 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
1013 SNDRV_PCM_TRIGGER_PAUSE_PUSH);
1014 }
1015
1016 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
1017 {
1018 struct snd_pcm_runtime *runtime = substream->runtime;
1019 snd_pcm_trigger_tstamp(substream);
1020 if (push) {
1021 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1022 if (substream->timer)
1023 snd_timer_notify(substream->timer,
1024 SNDRV_TIMER_EVENT_MPAUSE,
1025 &runtime->trigger_tstamp);
1026 wake_up(&runtime->sleep);
1027 wake_up(&runtime->tsleep);
1028 } else {
1029 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1030 if (substream->timer)
1031 snd_timer_notify(substream->timer,
1032 SNDRV_TIMER_EVENT_MCONTINUE,
1033 &runtime->trigger_tstamp);
1034 }
1035 }
1036
1037 static struct action_ops snd_pcm_action_pause = {
1038 .pre_action = snd_pcm_pre_pause,
1039 .do_action = snd_pcm_do_pause,
1040 .undo_action = snd_pcm_undo_pause,
1041 .post_action = snd_pcm_post_pause
1042 };
1043
1044 /*
1045 * Push/release the pause for all linked streams.
1046 */
1047 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1048 {
1049 return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1050 }
1051
1052 #ifdef CONFIG_PM
1053 /* suspend */
1054
1055 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1056 {
1057 struct snd_pcm_runtime *runtime = substream->runtime;
1058 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1059 return -EBUSY;
1060 runtime->trigger_master = substream;
1061 return 0;
1062 }
1063
1064 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1065 {
1066 struct snd_pcm_runtime *runtime = substream->runtime;
1067 if (runtime->trigger_master != substream)
1068 return 0;
1069 if (! snd_pcm_running(substream))
1070 return 0;
1071 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1072 return 0; /* suspend unconditionally */
1073 }
1074
1075 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1076 {
1077 struct snd_pcm_runtime *runtime = substream->runtime;
1078 snd_pcm_trigger_tstamp(substream);
1079 if (substream->timer)
1080 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1081 &runtime->trigger_tstamp);
1082 runtime->status->suspended_state = runtime->status->state;
1083 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1084 wake_up(&runtime->sleep);
1085 wake_up(&runtime->tsleep);
1086 }
1087
1088 static struct action_ops snd_pcm_action_suspend = {
1089 .pre_action = snd_pcm_pre_suspend,
1090 .do_action = snd_pcm_do_suspend,
1091 .post_action = snd_pcm_post_suspend
1092 };
1093
1094 /**
1095 * snd_pcm_suspend - trigger SUSPEND to all linked streams
1096 * @substream: the PCM substream
1097 *
1098 * After this call, all streams are changed to SUSPENDED state.
1099 */
1100 int snd_pcm_suspend(struct snd_pcm_substream *substream)
1101 {
1102 int err;
1103 unsigned long flags;
1104
1105 if (! substream)
1106 return 0;
1107
1108 snd_pcm_stream_lock_irqsave(substream, flags);
1109 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1110 snd_pcm_stream_unlock_irqrestore(substream, flags);
1111 return err;
1112 }
1113
1114 EXPORT_SYMBOL(snd_pcm_suspend);
1115
1116 /**
1117 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
1118 * @pcm: the PCM instance
1119 *
1120 * After this call, all streams are changed to SUSPENDED state.
1121 */
1122 int snd_pcm_suspend_all(struct snd_pcm *pcm)
1123 {
1124 struct snd_pcm_substream *substream;
1125 int stream, err = 0;
1126
1127 if (! pcm)
1128 return 0;
1129
1130 for (stream = 0; stream < 2; stream++) {
1131 for (substream = pcm->streams[stream].substream;
1132 substream; substream = substream->next) {
1133 /* FIXME: the open/close code should lock this as well */
1134 if (substream->runtime == NULL)
1135 continue;
1136 err = snd_pcm_suspend(substream);
1137 if (err < 0 && err != -EBUSY)
1138 return err;
1139 }
1140 }
1141 return 0;
1142 }
1143
1144 EXPORT_SYMBOL(snd_pcm_suspend_all);
1145
1146 /* resume */
1147
1148 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1149 {
1150 struct snd_pcm_runtime *runtime = substream->runtime;
1151 if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1152 return -ENOSYS;
1153 runtime->trigger_master = substream;
1154 return 0;
1155 }
1156
1157 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1158 {
1159 struct snd_pcm_runtime *runtime = substream->runtime;
1160 if (runtime->trigger_master != substream)
1161 return 0;
1162 /* DMA not running previously? */
1163 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1164 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1165 substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1166 return 0;
1167 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1168 }
1169
1170 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1171 {
1172 if (substream->runtime->trigger_master == substream &&
1173 snd_pcm_running(substream))
1174 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1175 }
1176
1177 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1178 {
1179 struct snd_pcm_runtime *runtime = substream->runtime;
1180 snd_pcm_trigger_tstamp(substream);
1181 if (substream->timer)
1182 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1183 &runtime->trigger_tstamp);
1184 runtime->status->state = runtime->status->suspended_state;
1185 }
1186
1187 static struct action_ops snd_pcm_action_resume = {
1188 .pre_action = snd_pcm_pre_resume,
1189 .do_action = snd_pcm_do_resume,
1190 .undo_action = snd_pcm_undo_resume,
1191 .post_action = snd_pcm_post_resume
1192 };
1193
1194 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1195 {
1196 struct snd_card *card = substream->pcm->card;
1197 int res;
1198
1199 snd_power_lock(card);
1200 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1201 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1202 snd_power_unlock(card);
1203 return res;
1204 }
1205
1206 #else
1207
1208 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1209 {
1210 return -ENOSYS;
1211 }
1212
1213 #endif /* CONFIG_PM */
1214
1215 /*
1216 * xrun ioctl
1217 *
1218 * Change the RUNNING stream(s) to XRUN state.
1219 */
1220 static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1221 {
1222 struct snd_card *card = substream->pcm->card;
1223 struct snd_pcm_runtime *runtime = substream->runtime;
1224 int result;
1225
1226 snd_power_lock(card);
1227 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1228 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1229 if (result < 0)
1230 goto _unlock;
1231 }
1232
1233 snd_pcm_stream_lock_irq(substream);
1234 switch (runtime->status->state) {
1235 case SNDRV_PCM_STATE_XRUN:
1236 result = 0; /* already there */
1237 break;
1238 case SNDRV_PCM_STATE_RUNNING:
1239 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1240 break;
1241 default:
1242 result = -EBADFD;
1243 }
1244 snd_pcm_stream_unlock_irq(substream);
1245 _unlock:
1246 snd_power_unlock(card);
1247 return result;
1248 }
1249
1250 /*
1251 * reset ioctl
1252 */
1253 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1254 {
1255 struct snd_pcm_runtime *runtime = substream->runtime;
1256 switch (runtime->status->state) {
1257 case SNDRV_PCM_STATE_RUNNING:
1258 case SNDRV_PCM_STATE_PREPARED:
1259 case SNDRV_PCM_STATE_PAUSED:
1260 case SNDRV_PCM_STATE_SUSPENDED:
1261 return 0;
1262 default:
1263 return -EBADFD;
1264 }
1265 }
1266
1267 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1268 {
1269 struct snd_pcm_runtime *runtime = substream->runtime;
1270 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1271 if (err < 0)
1272 return err;
1273 runtime->hw_ptr_base = 0;
1274 runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1275 runtime->status->hw_ptr % runtime->period_size;
1276 runtime->silence_start = runtime->status->hw_ptr;
1277 runtime->silence_filled = 0;
1278 return 0;
1279 }
1280
1281 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1282 {
1283 struct snd_pcm_runtime *runtime = substream->runtime;
1284 runtime->control->appl_ptr = runtime->status->hw_ptr;
1285 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1286 runtime->silence_size > 0)
1287 snd_pcm_playback_silence(substream, ULONG_MAX);
1288 }
1289
1290 static struct action_ops snd_pcm_action_reset = {
1291 .pre_action = snd_pcm_pre_reset,
1292 .do_action = snd_pcm_do_reset,
1293 .post_action = snd_pcm_post_reset
1294 };
1295
1296 static int snd_pcm_reset(struct snd_pcm_substream *substream)
1297 {
1298 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1299 }
1300
1301 /*
1302 * prepare ioctl
1303 */
1304 /* we use the second argument for updating f_flags */
1305 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1306 int f_flags)
1307 {
1308 struct snd_pcm_runtime *runtime = substream->runtime;
1309 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1310 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1311 return -EBADFD;
1312 if (snd_pcm_running(substream))
1313 return -EBUSY;
1314 substream->f_flags = f_flags;
1315 return 0;
1316 }
1317
1318 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1319 {
1320 int err;
1321 err = substream->ops->prepare(substream);
1322 if (err < 0)
1323 return err;
1324 return snd_pcm_do_reset(substream, 0);
1325 }
1326
1327 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1328 {
1329 struct snd_pcm_runtime *runtime = substream->runtime;
1330 runtime->control->appl_ptr = runtime->status->hw_ptr;
1331 snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED);
1332 }
1333
1334 static struct action_ops snd_pcm_action_prepare = {
1335 .pre_action = snd_pcm_pre_prepare,
1336 .do_action = snd_pcm_do_prepare,
1337 .post_action = snd_pcm_post_prepare
1338 };
1339
1340 /**
1341 * snd_pcm_prepare - prepare the PCM substream to be triggerable
1342 * @substream: the PCM substream instance
1343 * @file: file to refer f_flags
1344 */
1345 static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1346 struct file *file)
1347 {
1348 int res;
1349 struct snd_card *card = substream->pcm->card;
1350 int f_flags;
1351
1352 if (file)
1353 f_flags = file->f_flags;
1354 else
1355 f_flags = substream->f_flags;
1356
1357 snd_power_lock(card);
1358 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1359 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1360 substream, f_flags);
1361 snd_power_unlock(card);
1362 return res;
1363 }
1364
1365 /*
1366 * drain ioctl
1367 */
1368
1369 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1370 {
1371 substream->runtime->trigger_master = substream;
1372 return 0;
1373 }
1374
1375 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1376 {
1377 struct snd_pcm_runtime *runtime = substream->runtime;
1378 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1379 switch (runtime->status->state) {
1380 case SNDRV_PCM_STATE_PREPARED:
1381 /* start playback stream if possible */
1382 if (! snd_pcm_playback_empty(substream)) {
1383 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1384 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1385 }
1386 break;
1387 case SNDRV_PCM_STATE_RUNNING:
1388 runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1389 break;
1390 default:
1391 break;
1392 }
1393 } else {
1394 /* stop running stream */
1395 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1396 int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1397 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1398 snd_pcm_do_stop(substream, new_state);
1399 snd_pcm_post_stop(substream, new_state);
1400 }
1401 }
1402 return 0;
1403 }
1404
1405 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1406 {
1407 }
1408
1409 static struct action_ops snd_pcm_action_drain_init = {
1410 .pre_action = snd_pcm_pre_drain_init,
1411 .do_action = snd_pcm_do_drain_init,
1412 .post_action = snd_pcm_post_drain_init
1413 };
1414
1415 static int snd_pcm_drop(struct snd_pcm_substream *substream);
1416
1417 /*
1418 * Drain the stream(s).
1419 * When the substream is linked, sync until the draining of all playback streams
1420 * is finished.
1421 * After this call, all streams are supposed to be either SETUP or DRAINING
1422 * (capture only) state.
1423 */
1424 static int snd_pcm_drain(struct snd_pcm_substream *substream,
1425 struct file *file)
1426 {
1427 struct snd_card *card;
1428 struct snd_pcm_runtime *runtime;
1429 struct snd_pcm_substream *s;
1430 wait_queue_t wait;
1431 int result = 0;
1432 int nonblock = 0;
1433
1434 card = substream->pcm->card;
1435 runtime = substream->runtime;
1436
1437 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1438 return -EBADFD;
1439
1440 snd_power_lock(card);
1441 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1442 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1443 if (result < 0) {
1444 snd_power_unlock(card);
1445 return result;
1446 }
1447 }
1448
1449 if (file) {
1450 if (file->f_flags & O_NONBLOCK)
1451 nonblock = 1;
1452 } else if (substream->f_flags & O_NONBLOCK)
1453 nonblock = 1;
1454
1455 down_read(&snd_pcm_link_rwsem);
1456 snd_pcm_stream_lock_irq(substream);
1457 /* resume pause */
1458 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1459 snd_pcm_pause(substream, 0);
1460
1461 /* pre-start/stop - all running streams are changed to DRAINING state */
1462 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1463 if (result < 0)
1464 goto unlock;
1465 /* in non-blocking, we don't wait in ioctl but let caller poll */
1466 if (nonblock) {
1467 result = -EAGAIN;
1468 goto unlock;
1469 }
1470
1471 for (;;) {
1472 long tout;
1473 struct snd_pcm_runtime *to_check;
1474 if (signal_pending(current)) {
1475 result = -ERESTARTSYS;
1476 break;
1477 }
1478 /* find a substream to drain */
1479 to_check = NULL;
1480 snd_pcm_group_for_each_entry(s, substream) {
1481 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1482 continue;
1483 runtime = s->runtime;
1484 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1485 to_check = runtime;
1486 break;
1487 }
1488 }
1489 if (!to_check)
1490 break; /* all drained */
1491 init_waitqueue_entry(&wait, current);
1492 add_wait_queue(&to_check->sleep, &wait);
1493 snd_pcm_stream_unlock_irq(substream);
1494 up_read(&snd_pcm_link_rwsem);
1495 snd_power_unlock(card);
1496 if (runtime->no_period_wakeup)
1497 tout = MAX_SCHEDULE_TIMEOUT;
1498 else {
1499 tout = 10;
1500 if (runtime->rate) {
1501 long t = runtime->period_size * 2 / runtime->rate;
1502 tout = max(t, tout);
1503 }
1504 tout = msecs_to_jiffies(tout * 1000);
1505 }
1506 tout = schedule_timeout_interruptible(tout);
1507 snd_power_lock(card);
1508 down_read(&snd_pcm_link_rwsem);
1509 snd_pcm_stream_lock_irq(substream);
1510 remove_wait_queue(&to_check->sleep, &wait);
1511 if (card->shutdown) {
1512 result = -ENODEV;
1513 break;
1514 }
1515 if (tout == 0) {
1516 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1517 result = -ESTRPIPE;
1518 else {
1519 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1520 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1521 result = -EIO;
1522 }
1523 break;
1524 }
1525 }
1526
1527 unlock:
1528 snd_pcm_stream_unlock_irq(substream);
1529 up_read(&snd_pcm_link_rwsem);
1530 snd_power_unlock(card);
1531
1532 return result;
1533 }
1534
1535 /*
1536 * drop ioctl
1537 *
1538 * Immediately put all linked substreams into SETUP state.
1539 */
1540 static int snd_pcm_drop(struct snd_pcm_substream *substream)
1541 {
1542 struct snd_pcm_runtime *runtime;
1543 int result = 0;
1544
1545 if (PCM_RUNTIME_CHECK(substream))
1546 return -ENXIO;
1547 runtime = substream->runtime;
1548
1549 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1550 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1551 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1552 return -EBADFD;
1553
1554 snd_pcm_stream_lock_irq(substream);
1555 /* resume pause */
1556 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1557 snd_pcm_pause(substream, 0);
1558
1559 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1560 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1561 snd_pcm_stream_unlock_irq(substream);
1562
1563 return result;
1564 }
1565
1566
1567 /* WARNING: Don't forget to fput back the file */
1568 static struct file *snd_pcm_file_fd(int fd)
1569 {
1570 struct file *file;
1571 struct inode *inode;
1572 unsigned int minor;
1573
1574 file = fget(fd);
1575 if (!file)
1576 return NULL;
1577 inode = file->f_path.dentry->d_inode;
1578 if (!S_ISCHR(inode->i_mode) ||
1579 imajor(inode) != snd_major) {
1580 fput(file);
1581 return NULL;
1582 }
1583 minor = iminor(inode);
1584 if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) &&
1585 !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) {
1586 fput(file);
1587 return NULL;
1588 }
1589 return file;
1590 }
1591
1592 /*
1593 * PCM link handling
1594 */
1595 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1596 {
1597 int res = 0;
1598 struct file *file;
1599 struct snd_pcm_file *pcm_file;
1600 struct snd_pcm_substream *substream1;
1601 struct snd_pcm_group *group;
1602
1603 file = snd_pcm_file_fd(fd);
1604 if (!file)
1605 return -EBADFD;
1606 pcm_file = file->private_data;
1607 substream1 = pcm_file->substream;
1608 group = kmalloc(sizeof(*group), GFP_KERNEL);
1609 if (!group) {
1610 res = -ENOMEM;
1611 goto _nolock;
1612 }
1613 down_write(&snd_pcm_link_rwsem);
1614 write_lock_irq(&snd_pcm_link_rwlock);
1615 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1616 substream->runtime->status->state != substream1->runtime->status->state) {
1617 res = -EBADFD;
1618 goto _end;
1619 }
1620 if (snd_pcm_stream_linked(substream1)) {
1621 res = -EALREADY;
1622 goto _end;
1623 }
1624 if (!snd_pcm_stream_linked(substream)) {
1625 substream->group = group;
1626 spin_lock_init(&substream->group->lock);
1627 INIT_LIST_HEAD(&substream->group->substreams);
1628 list_add_tail(&substream->link_list, &substream->group->substreams);
1629 substream->group->count = 1;
1630 }
1631 list_add_tail(&substream1->link_list, &substream->group->substreams);
1632 substream->group->count++;
1633 substream1->group = substream->group;
1634 _end:
1635 write_unlock_irq(&snd_pcm_link_rwlock);
1636 up_write(&snd_pcm_link_rwsem);
1637 _nolock:
1638 snd_card_unref(substream1->pcm->card);
1639 fput(file);
1640 if (res < 0)
1641 kfree(group);
1642 return res;
1643 }
1644
1645 static void relink_to_local(struct snd_pcm_substream *substream)
1646 {
1647 substream->group = &substream->self_group;
1648 INIT_LIST_HEAD(&substream->self_group.substreams);
1649 list_add_tail(&substream->link_list, &substream->self_group.substreams);
1650 }
1651
1652 static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1653 {
1654 struct snd_pcm_substream *s;
1655 int res = 0;
1656
1657 down_write(&snd_pcm_link_rwsem);
1658 write_lock_irq(&snd_pcm_link_rwlock);
1659 if (!snd_pcm_stream_linked(substream)) {
1660 res = -EALREADY;
1661 goto _end;
1662 }
1663 list_del(&substream->link_list);
1664 substream->group->count--;
1665 if (substream->group->count == 1) { /* detach the last stream, too */
1666 snd_pcm_group_for_each_entry(s, substream) {
1667 relink_to_local(s);
1668 break;
1669 }
1670 kfree(substream->group);
1671 }
1672 relink_to_local(substream);
1673 _end:
1674 write_unlock_irq(&snd_pcm_link_rwlock);
1675 up_write(&snd_pcm_link_rwsem);
1676 return res;
1677 }
1678
1679 /*
1680 * hw configurator
1681 */
1682 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1683 struct snd_pcm_hw_rule *rule)
1684 {
1685 struct snd_interval t;
1686 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1687 hw_param_interval_c(params, rule->deps[1]), &t);
1688 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1689 }
1690
1691 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1692 struct snd_pcm_hw_rule *rule)
1693 {
1694 struct snd_interval t;
1695 snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1696 hw_param_interval_c(params, rule->deps[1]), &t);
1697 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1698 }
1699
1700 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1701 struct snd_pcm_hw_rule *rule)
1702 {
1703 struct snd_interval t;
1704 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1705 hw_param_interval_c(params, rule->deps[1]),
1706 (unsigned long) rule->private, &t);
1707 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1708 }
1709
1710 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1711 struct snd_pcm_hw_rule *rule)
1712 {
1713 struct snd_interval t;
1714 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1715 (unsigned long) rule->private,
1716 hw_param_interval_c(params, rule->deps[1]), &t);
1717 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1718 }
1719
1720 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1721 struct snd_pcm_hw_rule *rule)
1722 {
1723 unsigned int k;
1724 struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1725 struct snd_mask m;
1726 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1727 snd_mask_any(&m);
1728 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1729 int bits;
1730 if (! snd_mask_test(mask, k))
1731 continue;
1732 bits = snd_pcm_format_physical_width(k);
1733 if (bits <= 0)
1734 continue; /* ignore invalid formats */
1735 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1736 snd_mask_reset(&m, k);
1737 }
1738 return snd_mask_refine(mask, &m);
1739 }
1740
1741 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1742 struct snd_pcm_hw_rule *rule)
1743 {
1744 struct snd_interval t;
1745 unsigned int k;
1746 t.min = UINT_MAX;
1747 t.max = 0;
1748 t.openmin = 0;
1749 t.openmax = 0;
1750 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1751 int bits;
1752 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1753 continue;
1754 bits = snd_pcm_format_physical_width(k);
1755 if (bits <= 0)
1756 continue; /* ignore invalid formats */
1757 if (t.min > (unsigned)bits)
1758 t.min = bits;
1759 if (t.max < (unsigned)bits)
1760 t.max = bits;
1761 }
1762 t.integer = 1;
1763 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1764 }
1765
1766 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1767 #error "Change this table"
1768 #endif
1769
1770 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1771 48000, 64000, 88200, 96000, 176400, 192000 };
1772
1773 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1774 .count = ARRAY_SIZE(rates),
1775 .list = rates,
1776 };
1777
1778 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1779 struct snd_pcm_hw_rule *rule)
1780 {
1781 struct snd_pcm_hardware *hw = rule->private;
1782 return snd_interval_list(hw_param_interval(params, rule->var),
1783 snd_pcm_known_rates.count,
1784 snd_pcm_known_rates.list, hw->rates);
1785 }
1786
1787 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1788 struct snd_pcm_hw_rule *rule)
1789 {
1790 struct snd_interval t;
1791 struct snd_pcm_substream *substream = rule->private;
1792 t.min = 0;
1793 t.max = substream->buffer_bytes_max;
1794 t.openmin = 0;
1795 t.openmax = 0;
1796 t.integer = 1;
1797 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1798 }
1799
1800 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1801 {
1802 struct snd_pcm_runtime *runtime = substream->runtime;
1803 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1804 int k, err;
1805
1806 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1807 snd_mask_any(constrs_mask(constrs, k));
1808 }
1809
1810 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1811 snd_interval_any(constrs_interval(constrs, k));
1812 }
1813
1814 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1815 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1816 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1817 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1818 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1819
1820 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1821 snd_pcm_hw_rule_format, NULL,
1822 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1823 if (err < 0)
1824 return err;
1825 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1826 snd_pcm_hw_rule_sample_bits, NULL,
1827 SNDRV_PCM_HW_PARAM_FORMAT,
1828 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1829 if (err < 0)
1830 return err;
1831 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1832 snd_pcm_hw_rule_div, NULL,
1833 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1834 if (err < 0)
1835 return err;
1836 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1837 snd_pcm_hw_rule_mul, NULL,
1838 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1839 if (err < 0)
1840 return err;
1841 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1842 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1843 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1844 if (err < 0)
1845 return err;
1846 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1847 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1848 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1849 if (err < 0)
1850 return err;
1851 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1852 snd_pcm_hw_rule_div, NULL,
1853 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1854 if (err < 0)
1855 return err;
1856 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1857 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1858 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1859 if (err < 0)
1860 return err;
1861 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1862 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1863 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1864 if (err < 0)
1865 return err;
1866 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
1867 snd_pcm_hw_rule_div, NULL,
1868 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1869 if (err < 0)
1870 return err;
1871 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1872 snd_pcm_hw_rule_div, NULL,
1873 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1874 if (err < 0)
1875 return err;
1876 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1877 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1878 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1879 if (err < 0)
1880 return err;
1881 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1882 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1883 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1884 if (err < 0)
1885 return err;
1886 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1887 snd_pcm_hw_rule_mul, NULL,
1888 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1889 if (err < 0)
1890 return err;
1891 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1892 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1893 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1894 if (err < 0)
1895 return err;
1896 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1897 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1898 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1899 if (err < 0)
1900 return err;
1901 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1902 snd_pcm_hw_rule_muldivk, (void*) 8,
1903 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1904 if (err < 0)
1905 return err;
1906 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1907 snd_pcm_hw_rule_muldivk, (void*) 8,
1908 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1909 if (err < 0)
1910 return err;
1911 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1912 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1913 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1914 if (err < 0)
1915 return err;
1916 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
1917 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1918 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1919 if (err < 0)
1920 return err;
1921 return 0;
1922 }
1923
1924 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1925 {
1926 struct snd_pcm_runtime *runtime = substream->runtime;
1927 struct snd_pcm_hardware *hw = &runtime->hw;
1928 int err;
1929 unsigned int mask = 0;
1930
1931 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1932 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1933 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1934 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1935 if (hw->info & SNDRV_PCM_INFO_MMAP) {
1936 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1937 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1938 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1939 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1940 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1941 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1942 }
1943 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
1944 if (err < 0)
1945 return err;
1946
1947 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
1948 if (err < 0)
1949 return err;
1950
1951 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
1952 if (err < 0)
1953 return err;
1954
1955 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1956 hw->channels_min, hw->channels_max);
1957 if (err < 0)
1958 return err;
1959
1960 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1961 hw->rate_min, hw->rate_max);
1962 if (err < 0)
1963 return err;
1964
1965 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1966 hw->period_bytes_min, hw->period_bytes_max);
1967 if (err < 0)
1968 return err;
1969
1970 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1971 hw->periods_min, hw->periods_max);
1972 if (err < 0)
1973 return err;
1974
1975 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1976 hw->period_bytes_min, hw->buffer_bytes_max);
1977 if (err < 0)
1978 return err;
1979
1980 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1981 snd_pcm_hw_rule_buffer_bytes_max, substream,
1982 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1983 if (err < 0)
1984 return err;
1985
1986 /* FIXME: remove */
1987 if (runtime->dma_bytes) {
1988 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
1989 if (err < 0)
1990 return -EINVAL;
1991 }
1992
1993 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
1994 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1995 snd_pcm_hw_rule_rate, hw,
1996 SNDRV_PCM_HW_PARAM_RATE, -1);
1997 if (err < 0)
1998 return err;
1999 }
2000
2001 /* FIXME: this belong to lowlevel */
2002 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
2003
2004 return 0;
2005 }
2006
2007 static void pcm_release_private(struct snd_pcm_substream *substream)
2008 {
2009 snd_pcm_unlink(substream);
2010 }
2011
2012 void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2013 {
2014 substream->ref_count--;
2015 if (substream->ref_count > 0)
2016 return;
2017
2018 snd_pcm_drop(substream);
2019 if (substream->hw_opened) {
2020 if (substream->ops->hw_free != NULL)
2021 substream->ops->hw_free(substream);
2022 substream->ops->close(substream);
2023 substream->hw_opened = 0;
2024 }
2025 if (pm_qos_request_active(&substream->latency_pm_qos_req))
2026 pm_qos_remove_request(&substream->latency_pm_qos_req);
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 {
2082 struct snd_pcm_file *pcm_file;
2083 struct snd_pcm_substream *substream;
2084 int err;
2085
2086 err = snd_pcm_open_substream(pcm, stream, file, &substream);
2087 if (err < 0)
2088 return err;
2089
2090 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2091 if (pcm_file == NULL) {
2092 snd_pcm_release_substream(substream);
2093 return -ENOMEM;
2094 }
2095 pcm_file->substream = substream;
2096 if (substream->ref_count == 1) {
2097 substream->file = pcm_file;
2098 substream->pcm_release = pcm_release_private;
2099 }
2100 file->private_data = pcm_file;
2101
2102 return 0;
2103 }
2104
2105 static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2106 {
2107 struct snd_pcm *pcm;
2108 int err = nonseekable_open(inode, file);
2109 if (err < 0)
2110 return err;
2111 pcm = snd_lookup_minor_data(iminor(inode),
2112 SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2113 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2114 if (pcm)
2115 snd_card_unref(pcm->card);
2116 return err;
2117 }
2118
2119 static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2120 {
2121 struct snd_pcm *pcm;
2122 int err = nonseekable_open(inode, file);
2123 if (err < 0)
2124 return err;
2125 pcm = snd_lookup_minor_data(iminor(inode),
2126 SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2127 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2128 if (pcm)
2129 snd_card_unref(pcm->card);
2130 return err;
2131 }
2132
2133 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2134 {
2135 int err;
2136 wait_queue_t wait;
2137
2138 if (pcm == NULL) {
2139 err = -ENODEV;
2140 goto __error1;
2141 }
2142 err = snd_card_file_add(pcm->card, file);
2143 if (err < 0)
2144 goto __error1;
2145 if (!try_module_get(pcm->card->module)) {
2146 err = -EFAULT;
2147 goto __error2;
2148 }
2149 init_waitqueue_entry(&wait, current);
2150 add_wait_queue(&pcm->open_wait, &wait);
2151 mutex_lock(&pcm->open_mutex);
2152 while (1) {
2153 err = snd_pcm_open_file(file, pcm, stream);
2154 if (err >= 0)
2155 break;
2156 if (err == -EAGAIN) {
2157 if (file->f_flags & O_NONBLOCK) {
2158 err = -EBUSY;
2159 break;
2160 }
2161 } else
2162 break;
2163 set_current_state(TASK_INTERRUPTIBLE);
2164 mutex_unlock(&pcm->open_mutex);
2165 schedule();
2166 mutex_lock(&pcm->open_mutex);
2167 if (pcm->card->shutdown) {
2168 err = -ENODEV;
2169 break;
2170 }
2171 if (signal_pending(current)) {
2172 err = -ERESTARTSYS;
2173 break;
2174 }
2175 }
2176 remove_wait_queue(&pcm->open_wait, &wait);
2177 mutex_unlock(&pcm->open_mutex);
2178 if (err < 0)
2179 goto __error;
2180 return err;
2181
2182 __error:
2183 module_put(pcm->card->module);
2184 __error2:
2185 snd_card_file_remove(pcm->card, file);
2186 __error1:
2187 return err;
2188 }
2189
2190 static int snd_pcm_release(struct inode *inode, struct file *file)
2191 {
2192 struct snd_pcm *pcm;
2193 struct snd_pcm_substream *substream;
2194 struct snd_pcm_file *pcm_file;
2195
2196 pcm_file = file->private_data;
2197 substream = pcm_file->substream;
2198 if (snd_BUG_ON(!substream))
2199 return -ENXIO;
2200 pcm = substream->pcm;
2201 mutex_lock(&pcm->open_mutex);
2202 snd_pcm_release_substream(substream);
2203 kfree(pcm_file);
2204 mutex_unlock(&pcm->open_mutex);
2205 wake_up(&pcm->open_wait);
2206 module_put(pcm->card->module);
2207 snd_card_file_remove(pcm->card, file);
2208 return 0;
2209 }
2210
2211 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2212 snd_pcm_uframes_t frames)
2213 {
2214 struct snd_pcm_runtime *runtime = substream->runtime;
2215 snd_pcm_sframes_t appl_ptr;
2216 snd_pcm_sframes_t ret;
2217 snd_pcm_sframes_t hw_avail;
2218
2219 if (frames == 0)
2220 return 0;
2221
2222 snd_pcm_stream_lock_irq(substream);
2223 switch (runtime->status->state) {
2224 case SNDRV_PCM_STATE_PREPARED:
2225 break;
2226 case SNDRV_PCM_STATE_DRAINING:
2227 case SNDRV_PCM_STATE_RUNNING:
2228 if (snd_pcm_update_hw_ptr(substream) >= 0)
2229 break;
2230 /* Fall through */
2231 case SNDRV_PCM_STATE_XRUN:
2232 ret = -EPIPE;
2233 goto __end;
2234 case SNDRV_PCM_STATE_SUSPENDED:
2235 ret = -ESTRPIPE;
2236 goto __end;
2237 default:
2238 ret = -EBADFD;
2239 goto __end;
2240 }
2241
2242 hw_avail = snd_pcm_playback_hw_avail(runtime);
2243 if (hw_avail <= 0) {
2244 ret = 0;
2245 goto __end;
2246 }
2247 if (frames > (snd_pcm_uframes_t)hw_avail)
2248 frames = hw_avail;
2249 appl_ptr = runtime->control->appl_ptr - frames;
2250 if (appl_ptr < 0)
2251 appl_ptr += runtime->boundary;
2252 runtime->control->appl_ptr = appl_ptr;
2253 ret = frames;
2254 __end:
2255 snd_pcm_stream_unlock_irq(substream);
2256 return ret;
2257 }
2258
2259 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2260 snd_pcm_uframes_t frames)
2261 {
2262 struct snd_pcm_runtime *runtime = substream->runtime;
2263 snd_pcm_sframes_t appl_ptr;
2264 snd_pcm_sframes_t ret;
2265 snd_pcm_sframes_t hw_avail;
2266
2267 if (frames == 0)
2268 return 0;
2269
2270 snd_pcm_stream_lock_irq(substream);
2271 switch (runtime->status->state) {
2272 case SNDRV_PCM_STATE_PREPARED:
2273 case SNDRV_PCM_STATE_DRAINING:
2274 break;
2275 case SNDRV_PCM_STATE_RUNNING:
2276 if (snd_pcm_update_hw_ptr(substream) >= 0)
2277 break;
2278 /* Fall through */
2279 case SNDRV_PCM_STATE_XRUN:
2280 ret = -EPIPE;
2281 goto __end;
2282 case SNDRV_PCM_STATE_SUSPENDED:
2283 ret = -ESTRPIPE;
2284 goto __end;
2285 default:
2286 ret = -EBADFD;
2287 goto __end;
2288 }
2289
2290 hw_avail = snd_pcm_capture_hw_avail(runtime);
2291 if (hw_avail <= 0) {
2292 ret = 0;
2293 goto __end;
2294 }
2295 if (frames > (snd_pcm_uframes_t)hw_avail)
2296 frames = hw_avail;
2297 appl_ptr = runtime->control->appl_ptr - frames;
2298 if (appl_ptr < 0)
2299 appl_ptr += runtime->boundary;
2300 runtime->control->appl_ptr = appl_ptr;
2301 ret = frames;
2302 __end:
2303 snd_pcm_stream_unlock_irq(substream);
2304 return ret;
2305 }
2306
2307 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2308 snd_pcm_uframes_t frames)
2309 {
2310 struct snd_pcm_runtime *runtime = substream->runtime;
2311 snd_pcm_sframes_t appl_ptr;
2312 snd_pcm_sframes_t ret;
2313 snd_pcm_sframes_t avail;
2314
2315 if (frames == 0)
2316 return 0;
2317
2318 snd_pcm_stream_lock_irq(substream);
2319 switch (runtime->status->state) {
2320 case SNDRV_PCM_STATE_PREPARED:
2321 case SNDRV_PCM_STATE_PAUSED:
2322 break;
2323 case SNDRV_PCM_STATE_DRAINING:
2324 case SNDRV_PCM_STATE_RUNNING:
2325 if (snd_pcm_update_hw_ptr(substream) >= 0)
2326 break;
2327 /* Fall through */
2328 case SNDRV_PCM_STATE_XRUN:
2329 ret = -EPIPE;
2330 goto __end;
2331 case SNDRV_PCM_STATE_SUSPENDED:
2332 ret = -ESTRPIPE;
2333 goto __end;
2334 default:
2335 ret = -EBADFD;
2336 goto __end;
2337 }
2338
2339 avail = snd_pcm_playback_avail(runtime);
2340 if (avail <= 0) {
2341 ret = 0;
2342 goto __end;
2343 }
2344 if (frames > (snd_pcm_uframes_t)avail)
2345 frames = avail;
2346 appl_ptr = runtime->control->appl_ptr + frames;
2347 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2348 appl_ptr -= runtime->boundary;
2349 runtime->control->appl_ptr = appl_ptr;
2350 ret = frames;
2351 __end:
2352 snd_pcm_stream_unlock_irq(substream);
2353 return ret;
2354 }
2355
2356 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2357 snd_pcm_uframes_t frames)
2358 {
2359 struct snd_pcm_runtime *runtime = substream->runtime;
2360 snd_pcm_sframes_t appl_ptr;
2361 snd_pcm_sframes_t ret;
2362 snd_pcm_sframes_t avail;
2363
2364 if (frames == 0)
2365 return 0;
2366
2367 snd_pcm_stream_lock_irq(substream);
2368 switch (runtime->status->state) {
2369 case SNDRV_PCM_STATE_PREPARED:
2370 case SNDRV_PCM_STATE_DRAINING:
2371 case SNDRV_PCM_STATE_PAUSED:
2372 break;
2373 case SNDRV_PCM_STATE_RUNNING:
2374 if (snd_pcm_update_hw_ptr(substream) >= 0)
2375 break;
2376 /* Fall through */
2377 case SNDRV_PCM_STATE_XRUN:
2378 ret = -EPIPE;
2379 goto __end;
2380 case SNDRV_PCM_STATE_SUSPENDED:
2381 ret = -ESTRPIPE;
2382 goto __end;
2383 default:
2384 ret = -EBADFD;
2385 goto __end;
2386 }
2387
2388 avail = snd_pcm_capture_avail(runtime);
2389 if (avail <= 0) {
2390 ret = 0;
2391 goto __end;
2392 }
2393 if (frames > (snd_pcm_uframes_t)avail)
2394 frames = avail;
2395 appl_ptr = runtime->control->appl_ptr + frames;
2396 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2397 appl_ptr -= runtime->boundary;
2398 runtime->control->appl_ptr = appl_ptr;
2399 ret = frames;
2400 __end:
2401 snd_pcm_stream_unlock_irq(substream);
2402 return ret;
2403 }
2404
2405 static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2406 {
2407 struct snd_pcm_runtime *runtime = substream->runtime;
2408 int err;
2409
2410 snd_pcm_stream_lock_irq(substream);
2411 switch (runtime->status->state) {
2412 case SNDRV_PCM_STATE_DRAINING:
2413 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2414 goto __badfd;
2415 case SNDRV_PCM_STATE_RUNNING:
2416 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2417 break;
2418 /* Fall through */
2419 case SNDRV_PCM_STATE_PREPARED:
2420 case SNDRV_PCM_STATE_SUSPENDED:
2421 err = 0;
2422 break;
2423 case SNDRV_PCM_STATE_XRUN:
2424 err = -EPIPE;
2425 break;
2426 default:
2427 __badfd:
2428 err = -EBADFD;
2429 break;
2430 }
2431 snd_pcm_stream_unlock_irq(substream);
2432 return err;
2433 }
2434
2435 static int snd_pcm_delay(struct snd_pcm_substream *substream,
2436 snd_pcm_sframes_t __user *res)
2437 {
2438 struct snd_pcm_runtime *runtime = substream->runtime;
2439 int err;
2440 snd_pcm_sframes_t n = 0;
2441
2442 snd_pcm_stream_lock_irq(substream);
2443 switch (runtime->status->state) {
2444 case SNDRV_PCM_STATE_DRAINING:
2445 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2446 goto __badfd;
2447 case SNDRV_PCM_STATE_RUNNING:
2448 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2449 break;
2450 /* Fall through */
2451 case SNDRV_PCM_STATE_PREPARED:
2452 case SNDRV_PCM_STATE_SUSPENDED:
2453 err = 0;
2454 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2455 n = snd_pcm_playback_hw_avail(runtime);
2456 else
2457 n = snd_pcm_capture_avail(runtime);
2458 n += runtime->delay;
2459 break;
2460 case SNDRV_PCM_STATE_XRUN:
2461 err = -EPIPE;
2462 break;
2463 default:
2464 __badfd:
2465 err = -EBADFD;
2466 break;
2467 }
2468 snd_pcm_stream_unlock_irq(substream);
2469 if (!err)
2470 if (put_user(n, res))
2471 err = -EFAULT;
2472 return err;
2473 }
2474
2475 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2476 struct snd_pcm_sync_ptr __user *_sync_ptr)
2477 {
2478 struct snd_pcm_runtime *runtime = substream->runtime;
2479 struct snd_pcm_sync_ptr sync_ptr;
2480 volatile struct snd_pcm_mmap_status *status;
2481 volatile struct snd_pcm_mmap_control *control;
2482 int err;
2483
2484 memset(&sync_ptr, 0, sizeof(sync_ptr));
2485 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2486 return -EFAULT;
2487 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2488 return -EFAULT;
2489 status = runtime->status;
2490 control = runtime->control;
2491 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2492 err = snd_pcm_hwsync(substream);
2493 if (err < 0)
2494 return err;
2495 }
2496 snd_pcm_stream_lock_irq(substream);
2497 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2498 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2499 else
2500 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2501 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2502 control->avail_min = sync_ptr.c.control.avail_min;
2503 else
2504 sync_ptr.c.control.avail_min = control->avail_min;
2505 sync_ptr.s.status.state = status->state;
2506 sync_ptr.s.status.hw_ptr = status->hw_ptr;
2507 sync_ptr.s.status.tstamp = status->tstamp;
2508 sync_ptr.s.status.suspended_state = status->suspended_state;
2509 snd_pcm_stream_unlock_irq(substream);
2510 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2511 return -EFAULT;
2512 return 0;
2513 }
2514
2515 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2516 {
2517 struct snd_pcm_runtime *runtime = substream->runtime;
2518 int arg;
2519
2520 if (get_user(arg, _arg))
2521 return -EFAULT;
2522 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2523 return -EINVAL;
2524 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY;
2525 if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
2526 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC;
2527 return 0;
2528 }
2529
2530 static int snd_pcm_common_ioctl1(struct file *file,
2531 struct snd_pcm_substream *substream,
2532 unsigned int cmd, void __user *arg)
2533 {
2534 switch (cmd) {
2535 case SNDRV_PCM_IOCTL_PVERSION:
2536 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2537 case SNDRV_PCM_IOCTL_INFO:
2538 return snd_pcm_info_user(substream, arg);
2539 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
2540 return 0;
2541 case SNDRV_PCM_IOCTL_TTSTAMP:
2542 return snd_pcm_tstamp(substream, arg);
2543 case SNDRV_PCM_IOCTL_HW_REFINE:
2544 return snd_pcm_hw_refine_user(substream, arg);
2545 case SNDRV_PCM_IOCTL_HW_PARAMS:
2546 return snd_pcm_hw_params_user(substream, arg);
2547 case SNDRV_PCM_IOCTL_HW_FREE:
2548 return snd_pcm_hw_free(substream);
2549 case SNDRV_PCM_IOCTL_SW_PARAMS:
2550 return snd_pcm_sw_params_user(substream, arg);
2551 case SNDRV_PCM_IOCTL_STATUS:
2552 return snd_pcm_status_user(substream, arg);
2553 case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2554 return snd_pcm_channel_info_user(substream, arg);
2555 case SNDRV_PCM_IOCTL_PREPARE:
2556 return snd_pcm_prepare(substream, file);
2557 case SNDRV_PCM_IOCTL_RESET:
2558 return snd_pcm_reset(substream);
2559 case SNDRV_PCM_IOCTL_START:
2560 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2561 case SNDRV_PCM_IOCTL_LINK:
2562 return snd_pcm_link(substream, (int)(unsigned long) arg);
2563 case SNDRV_PCM_IOCTL_UNLINK:
2564 return snd_pcm_unlink(substream);
2565 case SNDRV_PCM_IOCTL_RESUME:
2566 return snd_pcm_resume(substream);
2567 case SNDRV_PCM_IOCTL_XRUN:
2568 return snd_pcm_xrun(substream);
2569 case SNDRV_PCM_IOCTL_HWSYNC:
2570 return snd_pcm_hwsync(substream);
2571 case SNDRV_PCM_IOCTL_DELAY:
2572 return snd_pcm_delay(substream, arg);
2573 case SNDRV_PCM_IOCTL_SYNC_PTR:
2574 return snd_pcm_sync_ptr(substream, arg);
2575 #ifdef CONFIG_SND_SUPPORT_OLD_API
2576 case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2577 return snd_pcm_hw_refine_old_user(substream, arg);
2578 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2579 return snd_pcm_hw_params_old_user(substream, arg);
2580 #endif
2581 case SNDRV_PCM_IOCTL_DRAIN:
2582 return snd_pcm_drain(substream, file);
2583 case SNDRV_PCM_IOCTL_DROP:
2584 return snd_pcm_drop(substream);
2585 case SNDRV_PCM_IOCTL_PAUSE:
2586 {
2587 int res;
2588 snd_pcm_stream_lock_irq(substream);
2589 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2590 snd_pcm_stream_unlock_irq(substream);
2591 return res;
2592 }
2593 }
2594 snd_printd("unknown ioctl = 0x%x\n", cmd);
2595 return -ENOTTY;
2596 }
2597
2598 static int snd_pcm_playback_ioctl1(struct file *file,
2599 struct snd_pcm_substream *substream,
2600 unsigned int cmd, void __user *arg)
2601 {
2602 if (snd_BUG_ON(!substream))
2603 return -ENXIO;
2604 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2605 return -EINVAL;
2606 switch (cmd) {
2607 case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2608 {
2609 struct snd_xferi xferi;
2610 struct snd_xferi __user *_xferi = arg;
2611 struct snd_pcm_runtime *runtime = substream->runtime;
2612 snd_pcm_sframes_t result;
2613 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2614 return -EBADFD;
2615 if (put_user(0, &_xferi->result))
2616 return -EFAULT;
2617 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2618 return -EFAULT;
2619 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2620 __put_user(result, &_xferi->result);
2621 return result < 0 ? result : 0;
2622 }
2623 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2624 {
2625 struct snd_xfern xfern;
2626 struct snd_xfern __user *_xfern = arg;
2627 struct snd_pcm_runtime *runtime = substream->runtime;
2628 void __user **bufs;
2629 snd_pcm_sframes_t result;
2630 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2631 return -EBADFD;
2632 if (runtime->channels > 128)
2633 return -EINVAL;
2634 if (put_user(0, &_xfern->result))
2635 return -EFAULT;
2636 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2637 return -EFAULT;
2638
2639 bufs = memdup_user(xfern.bufs,
2640 sizeof(void *) * runtime->channels);
2641 if (IS_ERR(bufs))
2642 return PTR_ERR(bufs);
2643 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2644 kfree(bufs);
2645 __put_user(result, &_xfern->result);
2646 return result < 0 ? result : 0;
2647 }
2648 case SNDRV_PCM_IOCTL_REWIND:
2649 {
2650 snd_pcm_uframes_t frames;
2651 snd_pcm_uframes_t __user *_frames = arg;
2652 snd_pcm_sframes_t result;
2653 if (get_user(frames, _frames))
2654 return -EFAULT;
2655 if (put_user(0, _frames))
2656 return -EFAULT;
2657 result = snd_pcm_playback_rewind(substream, frames);
2658 __put_user(result, _frames);
2659 return result < 0 ? result : 0;
2660 }
2661 case SNDRV_PCM_IOCTL_FORWARD:
2662 {
2663 snd_pcm_uframes_t frames;
2664 snd_pcm_uframes_t __user *_frames = arg;
2665 snd_pcm_sframes_t result;
2666 if (get_user(frames, _frames))
2667 return -EFAULT;
2668 if (put_user(0, _frames))
2669 return -EFAULT;
2670 result = snd_pcm_playback_forward(substream, frames);
2671 __put_user(result, _frames);
2672 return result < 0 ? result : 0;
2673 }
2674 }
2675 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2676 }
2677
2678 static int snd_pcm_capture_ioctl1(struct file *file,
2679 struct snd_pcm_substream *substream,
2680 unsigned int cmd, void __user *arg)
2681 {
2682 if (snd_BUG_ON(!substream))
2683 return -ENXIO;
2684 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2685 return -EINVAL;
2686 switch (cmd) {
2687 case SNDRV_PCM_IOCTL_READI_FRAMES:
2688 {
2689 struct snd_xferi xferi;
2690 struct snd_xferi __user *_xferi = arg;
2691 struct snd_pcm_runtime *runtime = substream->runtime;
2692 snd_pcm_sframes_t result;
2693 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2694 return -EBADFD;
2695 if (put_user(0, &_xferi->result))
2696 return -EFAULT;
2697 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2698 return -EFAULT;
2699 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2700 __put_user(result, &_xferi->result);
2701 return result < 0 ? result : 0;
2702 }
2703 case SNDRV_PCM_IOCTL_READN_FRAMES:
2704 {
2705 struct snd_xfern xfern;
2706 struct snd_xfern __user *_xfern = arg;
2707 struct snd_pcm_runtime *runtime = substream->runtime;
2708 void *bufs;
2709 snd_pcm_sframes_t result;
2710 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2711 return -EBADFD;
2712 if (runtime->channels > 128)
2713 return -EINVAL;
2714 if (put_user(0, &_xfern->result))
2715 return -EFAULT;
2716 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2717 return -EFAULT;
2718
2719 bufs = memdup_user(xfern.bufs,
2720 sizeof(void *) * runtime->channels);
2721 if (IS_ERR(bufs))
2722 return PTR_ERR(bufs);
2723 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2724 kfree(bufs);
2725 __put_user(result, &_xfern->result);
2726 return result < 0 ? result : 0;
2727 }
2728 case SNDRV_PCM_IOCTL_REWIND:
2729 {
2730 snd_pcm_uframes_t frames;
2731 snd_pcm_uframes_t __user *_frames = arg;
2732 snd_pcm_sframes_t result;
2733 if (get_user(frames, _frames))
2734 return -EFAULT;
2735 if (put_user(0, _frames))
2736 return -EFAULT;
2737 result = snd_pcm_capture_rewind(substream, frames);
2738 __put_user(result, _frames);
2739 return result < 0 ? result : 0;
2740 }
2741 case SNDRV_PCM_IOCTL_FORWARD:
2742 {
2743 snd_pcm_uframes_t frames;
2744 snd_pcm_uframes_t __user *_frames = arg;
2745 snd_pcm_sframes_t result;
2746 if (get_user(frames, _frames))
2747 return -EFAULT;
2748 if (put_user(0, _frames))
2749 return -EFAULT;
2750 result = snd_pcm_capture_forward(substream, frames);
2751 __put_user(result, _frames);
2752 return result < 0 ? result : 0;
2753 }
2754 }
2755 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2756 }
2757
2758 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2759 unsigned long arg)
2760 {
2761 struct snd_pcm_file *pcm_file;
2762
2763 pcm_file = file->private_data;
2764
2765 if (((cmd >> 8) & 0xff) != 'A')
2766 return -ENOTTY;
2767
2768 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2769 (void __user *)arg);
2770 }
2771
2772 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2773 unsigned long arg)
2774 {
2775 struct snd_pcm_file *pcm_file;
2776
2777 pcm_file = file->private_data;
2778
2779 if (((cmd >> 8) & 0xff) != 'A')
2780 return -ENOTTY;
2781
2782 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2783 (void __user *)arg);
2784 }
2785
2786 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2787 unsigned int cmd, void *arg)
2788 {
2789 mm_segment_t fs;
2790 int result;
2791
2792 fs = snd_enter_user();
2793 switch (substream->stream) {
2794 case SNDRV_PCM_STREAM_PLAYBACK:
2795 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2796 (void __user *)arg);
2797 break;
2798 case SNDRV_PCM_STREAM_CAPTURE:
2799 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2800 (void __user *)arg);
2801 break;
2802 default:
2803 result = -EINVAL;
2804 break;
2805 }
2806 snd_leave_user(fs);
2807 return result;
2808 }
2809
2810 EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2811
2812 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2813 loff_t * offset)
2814 {
2815 struct snd_pcm_file *pcm_file;
2816 struct snd_pcm_substream *substream;
2817 struct snd_pcm_runtime *runtime;
2818 snd_pcm_sframes_t result;
2819
2820 pcm_file = file->private_data;
2821 substream = pcm_file->substream;
2822 if (PCM_RUNTIME_CHECK(substream))
2823 return -ENXIO;
2824 runtime = substream->runtime;
2825 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2826 return -EBADFD;
2827 if (!frame_aligned(runtime, count))
2828 return -EINVAL;
2829 count = bytes_to_frames(runtime, count);
2830 result = snd_pcm_lib_read(substream, buf, count);
2831 if (result > 0)
2832 result = frames_to_bytes(runtime, result);
2833 return result;
2834 }
2835
2836 static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2837 size_t count, loff_t * offset)
2838 {
2839 struct snd_pcm_file *pcm_file;
2840 struct snd_pcm_substream *substream;
2841 struct snd_pcm_runtime *runtime;
2842 snd_pcm_sframes_t result;
2843
2844 pcm_file = file->private_data;
2845 substream = pcm_file->substream;
2846 if (PCM_RUNTIME_CHECK(substream))
2847 return -ENXIO;
2848 runtime = substream->runtime;
2849 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2850 return -EBADFD;
2851 if (!frame_aligned(runtime, count))
2852 return -EINVAL;
2853 count = bytes_to_frames(runtime, count);
2854 result = snd_pcm_lib_write(substream, buf, count);
2855 if (result > 0)
2856 result = frames_to_bytes(runtime, result);
2857 return result;
2858 }
2859
2860 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
2861 unsigned long nr_segs, loff_t pos)
2862
2863 {
2864 struct snd_pcm_file *pcm_file;
2865 struct snd_pcm_substream *substream;
2866 struct snd_pcm_runtime *runtime;
2867 snd_pcm_sframes_t result;
2868 unsigned long i;
2869 void __user **bufs;
2870 snd_pcm_uframes_t frames;
2871
2872 pcm_file = iocb->ki_filp->private_data;
2873 substream = pcm_file->substream;
2874 if (PCM_RUNTIME_CHECK(substream))
2875 return -ENXIO;
2876 runtime = substream->runtime;
2877 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2878 return -EBADFD;
2879 if (nr_segs > 1024 || nr_segs != runtime->channels)
2880 return -EINVAL;
2881 if (!frame_aligned(runtime, iov->iov_len))
2882 return -EINVAL;
2883 frames = bytes_to_samples(runtime, iov->iov_len);
2884 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2885 if (bufs == NULL)
2886 return -ENOMEM;
2887 for (i = 0; i < nr_segs; ++i)
2888 bufs[i] = iov[i].iov_base;
2889 result = snd_pcm_lib_readv(substream, bufs, frames);
2890 if (result > 0)
2891 result = frames_to_bytes(runtime, result);
2892 kfree(bufs);
2893 return result;
2894 }
2895
2896 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
2897 unsigned long nr_segs, loff_t pos)
2898 {
2899 struct snd_pcm_file *pcm_file;
2900 struct snd_pcm_substream *substream;
2901 struct snd_pcm_runtime *runtime;
2902 snd_pcm_sframes_t result;
2903 unsigned long i;
2904 void __user **bufs;
2905 snd_pcm_uframes_t frames;
2906
2907 pcm_file = iocb->ki_filp->private_data;
2908 substream = pcm_file->substream;
2909 if (PCM_RUNTIME_CHECK(substream))
2910 return -ENXIO;
2911 runtime = substream->runtime;
2912 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2913 return -EBADFD;
2914 if (nr_segs > 128 || nr_segs != runtime->channels ||
2915 !frame_aligned(runtime, iov->iov_len))
2916 return -EINVAL;
2917 frames = bytes_to_samples(runtime, iov->iov_len);
2918 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2919 if (bufs == NULL)
2920 return -ENOMEM;
2921 for (i = 0; i < nr_segs; ++i)
2922 bufs[i] = iov[i].iov_base;
2923 result = snd_pcm_lib_writev(substream, bufs, frames);
2924 if (result > 0)
2925 result = frames_to_bytes(runtime, result);
2926 kfree(bufs);
2927 return result;
2928 }
2929
2930 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2931 {
2932 struct snd_pcm_file *pcm_file;
2933 struct snd_pcm_substream *substream;
2934 struct snd_pcm_runtime *runtime;
2935 unsigned int mask;
2936 snd_pcm_uframes_t avail;
2937
2938 pcm_file = file->private_data;
2939
2940 substream = pcm_file->substream;
2941 if (PCM_RUNTIME_CHECK(substream))
2942 return -ENXIO;
2943 runtime = substream->runtime;
2944
2945 poll_wait(file, &runtime->sleep, wait);
2946
2947 snd_pcm_stream_lock_irq(substream);
2948 avail = snd_pcm_playback_avail(runtime);
2949 switch (runtime->status->state) {
2950 case SNDRV_PCM_STATE_RUNNING:
2951 case SNDRV_PCM_STATE_PREPARED:
2952 case SNDRV_PCM_STATE_PAUSED:
2953 if (avail >= runtime->control->avail_min) {
2954 mask = POLLOUT | POLLWRNORM;
2955 break;
2956 }
2957 /* Fall through */
2958 case SNDRV_PCM_STATE_DRAINING:
2959 mask = 0;
2960 break;
2961 default:
2962 mask = POLLOUT | POLLWRNORM | POLLERR;
2963 break;
2964 }
2965 snd_pcm_stream_unlock_irq(substream);
2966 return mask;
2967 }
2968
2969 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2970 {
2971 struct snd_pcm_file *pcm_file;
2972 struct snd_pcm_substream *substream;
2973 struct snd_pcm_runtime *runtime;
2974 unsigned int mask;
2975 snd_pcm_uframes_t avail;
2976
2977 pcm_file = file->private_data;
2978
2979 substream = pcm_file->substream;
2980 if (PCM_RUNTIME_CHECK(substream))
2981 return -ENXIO;
2982 runtime = substream->runtime;
2983
2984 poll_wait(file, &runtime->sleep, wait);
2985
2986 snd_pcm_stream_lock_irq(substream);
2987 avail = snd_pcm_capture_avail(runtime);
2988 switch (runtime->status->state) {
2989 case SNDRV_PCM_STATE_RUNNING:
2990 case SNDRV_PCM_STATE_PREPARED:
2991 case SNDRV_PCM_STATE_PAUSED:
2992 if (avail >= runtime->control->avail_min) {
2993 mask = POLLIN | POLLRDNORM;
2994 break;
2995 }
2996 mask = 0;
2997 break;
2998 case SNDRV_PCM_STATE_DRAINING:
2999 if (avail > 0) {
3000 mask = POLLIN | POLLRDNORM;
3001 break;
3002 }
3003 /* Fall through */
3004 default:
3005 mask = POLLIN | POLLRDNORM | POLLERR;
3006 break;
3007 }
3008 snd_pcm_stream_unlock_irq(substream);
3009 return mask;
3010 }
3011
3012 /*
3013 * mmap support
3014 */
3015
3016 /*
3017 * Only on coherent architectures, we can mmap the status and the control records
3018 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
3019 */
3020 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3021 /*
3022 * mmap status record
3023 */
3024 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
3025 struct vm_fault *vmf)
3026 {
3027 struct snd_pcm_substream *substream = area->vm_private_data;
3028 struct snd_pcm_runtime *runtime;
3029
3030 if (substream == NULL)
3031 return VM_FAULT_SIGBUS;
3032 runtime = substream->runtime;
3033 vmf->page = virt_to_page(runtime->status);
3034 get_page(vmf->page);
3035 return 0;
3036 }
3037
3038 static const struct vm_operations_struct snd_pcm_vm_ops_status =
3039 {
3040 .fault = snd_pcm_mmap_status_fault,
3041 };
3042
3043 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3044 struct vm_area_struct *area)
3045 {
3046 long size;
3047 if (!(area->vm_flags & VM_READ))
3048 return -EINVAL;
3049 size = area->vm_end - area->vm_start;
3050 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3051 return -EINVAL;
3052 area->vm_ops = &snd_pcm_vm_ops_status;
3053 area->vm_private_data = substream;
3054 area->vm_flags |= VM_RESERVED;
3055 return 0;
3056 }
3057
3058 /*
3059 * mmap control record
3060 */
3061 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3062 struct vm_fault *vmf)
3063 {
3064 struct snd_pcm_substream *substream = area->vm_private_data;
3065 struct snd_pcm_runtime *runtime;
3066
3067 if (substream == NULL)
3068 return VM_FAULT_SIGBUS;
3069 runtime = substream->runtime;
3070 vmf->page = virt_to_page(runtime->control);
3071 get_page(vmf->page);
3072 return 0;
3073 }
3074
3075 static const struct vm_operations_struct snd_pcm_vm_ops_control =
3076 {
3077 .fault = snd_pcm_mmap_control_fault,
3078 };
3079
3080 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3081 struct vm_area_struct *area)
3082 {
3083 long size;
3084 if (!(area->vm_flags & VM_READ))
3085 return -EINVAL;
3086 size = area->vm_end - area->vm_start;
3087 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3088 return -EINVAL;
3089 area->vm_ops = &snd_pcm_vm_ops_control;
3090 area->vm_private_data = substream;
3091 area->vm_flags |= VM_RESERVED;
3092 return 0;
3093 }
3094 #else /* ! coherent mmap */
3095 /*
3096 * don't support mmap for status and control records.
3097 */
3098 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3099 struct vm_area_struct *area)
3100 {
3101 return -ENXIO;
3102 }
3103 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3104 struct vm_area_struct *area)
3105 {
3106 return -ENXIO;
3107 }
3108 #endif /* coherent mmap */
3109
3110 static inline struct page *
3111 snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3112 {
3113 void *vaddr = substream->runtime->dma_area + ofs;
3114 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3115 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3116 return virt_to_page(CAC_ADDR(vaddr));
3117 #endif
3118 #if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE)
3119 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) {
3120 dma_addr_t addr = substream->runtime->dma_addr + ofs;
3121 addr -= get_dma_offset(substream->dma_buffer.dev.dev);
3122 /* assume dma_handle set via pfn_to_phys() in
3123 * mm/dma-noncoherent.c
3124 */
3125 return pfn_to_page(addr >> PAGE_SHIFT);
3126 }
3127 #endif
3128 return virt_to_page(vaddr);
3129 }
3130
3131 /*
3132 * fault callback for mmapping a RAM page
3133 */
3134 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3135 struct vm_fault *vmf)
3136 {
3137 struct snd_pcm_substream *substream = area->vm_private_data;
3138 struct snd_pcm_runtime *runtime;
3139 unsigned long offset;
3140 struct page * page;
3141 size_t dma_bytes;
3142
3143 if (substream == NULL)
3144 return VM_FAULT_SIGBUS;
3145 runtime = substream->runtime;
3146 offset = vmf->pgoff << PAGE_SHIFT;
3147 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3148 if (offset > dma_bytes - PAGE_SIZE)
3149 return VM_FAULT_SIGBUS;
3150 if (substream->ops->page)
3151 page = substream->ops->page(substream, offset);
3152 else
3153 page = snd_pcm_default_page_ops(substream, offset);
3154 if (!page)
3155 return VM_FAULT_SIGBUS;
3156 get_page(page);
3157 vmf->page = page;
3158 return 0;
3159 }
3160
3161 static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3162 .open = snd_pcm_mmap_data_open,
3163 .close = snd_pcm_mmap_data_close,
3164 };
3165
3166 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
3167 .open = snd_pcm_mmap_data_open,
3168 .close = snd_pcm_mmap_data_close,
3169 .fault = snd_pcm_mmap_data_fault,
3170 };
3171
3172 #ifndef ARCH_HAS_DMA_MMAP_COHERENT
3173 /* This should be defined / handled globally! */
3174 #ifdef CONFIG_ARM
3175 #define ARCH_HAS_DMA_MMAP_COHERENT
3176 #endif
3177 #endif
3178
3179 /*
3180 * mmap the DMA buffer on RAM
3181 */
3182 int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
3183 struct vm_area_struct *area)
3184 {
3185 area->vm_flags |= VM_RESERVED;
3186 #ifdef ARCH_HAS_DMA_MMAP_COHERENT
3187 if (!substream->ops->page &&
3188 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3189 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3190 area,
3191 substream->runtime->dma_area,
3192 substream->runtime->dma_addr,
3193 area->vm_end - area->vm_start);
3194 #elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3195 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV &&
3196 !plat_device_is_coherent(substream->dma_buffer.dev.dev))
3197 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3198 #endif /* ARCH_HAS_DMA_MMAP_COHERENT */
3199 /* mmap with fault handler */
3200 area->vm_ops = &snd_pcm_vm_ops_data_fault;
3201 return 0;
3202 }
3203 EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap);
3204
3205 /*
3206 * mmap the DMA buffer on I/O memory area
3207 */
3208 #if SNDRV_PCM_INFO_MMAP_IOMEM
3209 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3210 struct vm_area_struct *area)
3211 {
3212 long size;
3213 unsigned long offset;
3214
3215 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3216 area->vm_flags |= VM_IO;
3217 size = area->vm_end - area->vm_start;
3218 offset = area->vm_pgoff << PAGE_SHIFT;
3219 if (io_remap_pfn_range(area, area->vm_start,
3220 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3221 size, area->vm_page_prot))
3222 return -EAGAIN;
3223 return 0;
3224 }
3225
3226 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3227 #endif /* SNDRV_PCM_INFO_MMAP */
3228
3229 /*
3230 * mmap DMA buffer
3231 */
3232 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3233 struct vm_area_struct *area)
3234 {
3235 struct snd_pcm_runtime *runtime;
3236 long size;
3237 unsigned long offset;
3238 size_t dma_bytes;
3239 int err;
3240
3241 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3242 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3243 return -EINVAL;
3244 } else {
3245 if (!(area->vm_flags & VM_READ))
3246 return -EINVAL;
3247 }
3248 runtime = substream->runtime;
3249 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3250 return -EBADFD;
3251 if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3252 return -ENXIO;
3253 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3254 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3255 return -EINVAL;
3256 size = area->vm_end - area->vm_start;
3257 offset = area->vm_pgoff << PAGE_SHIFT;
3258 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3259 if ((size_t)size > dma_bytes)
3260 return -EINVAL;
3261 if (offset > dma_bytes - size)
3262 return -EINVAL;
3263
3264 area->vm_ops = &snd_pcm_vm_ops_data;
3265 area->vm_private_data = substream;
3266 if (substream->ops->mmap)
3267 err = substream->ops->mmap(substream, area);
3268 else
3269 err = snd_pcm_lib_default_mmap(substream, area);
3270 if (!err)
3271 atomic_inc(&substream->mmap_count);
3272 return err;
3273 }
3274
3275 EXPORT_SYMBOL(snd_pcm_mmap_data);
3276
3277 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3278 {
3279 struct snd_pcm_file * pcm_file;
3280 struct snd_pcm_substream *substream;
3281 unsigned long offset;
3282
3283 pcm_file = file->private_data;
3284 substream = pcm_file->substream;
3285 if (PCM_RUNTIME_CHECK(substream))
3286 return -ENXIO;
3287
3288 offset = area->vm_pgoff << PAGE_SHIFT;
3289 switch (offset) {
3290 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3291 if (pcm_file->no_compat_mmap)
3292 return -ENXIO;
3293 return snd_pcm_mmap_status(substream, file, area);
3294 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3295 if (pcm_file->no_compat_mmap)
3296 return -ENXIO;
3297 return snd_pcm_mmap_control(substream, file, area);
3298 default:
3299 return snd_pcm_mmap_data(substream, file, area);
3300 }
3301 return 0;
3302 }
3303
3304 static int snd_pcm_fasync(int fd, struct file * file, int on)
3305 {
3306 struct snd_pcm_file * pcm_file;
3307 struct snd_pcm_substream *substream;
3308 struct snd_pcm_runtime *runtime;
3309
3310 pcm_file = file->private_data;
3311 substream = pcm_file->substream;
3312 if (PCM_RUNTIME_CHECK(substream))
3313 return -ENXIO;
3314 runtime = substream->runtime;
3315 return fasync_helper(fd, file, on, &runtime->fasync);
3316 }
3317
3318 /*
3319 * ioctl32 compat
3320 */
3321 #ifdef CONFIG_COMPAT
3322 #include "pcm_compat.c"
3323 #else
3324 #define snd_pcm_ioctl_compat NULL
3325 #endif
3326
3327 /*
3328 * To be removed helpers to keep binary compatibility
3329 */
3330
3331 #ifdef CONFIG_SND_SUPPORT_OLD_API
3332 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3333 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3334
3335 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3336 struct snd_pcm_hw_params_old *oparams)
3337 {
3338 unsigned int i;
3339
3340 memset(params, 0, sizeof(*params));
3341 params->flags = oparams->flags;
3342 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3343 params->masks[i].bits[0] = oparams->masks[i];
3344 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3345 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3346 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3347 params->info = oparams->info;
3348 params->msbits = oparams->msbits;
3349 params->rate_num = oparams->rate_num;
3350 params->rate_den = oparams->rate_den;
3351 params->fifo_size = oparams->fifo_size;
3352 }
3353
3354 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3355 struct snd_pcm_hw_params *params)
3356 {
3357 unsigned int i;
3358
3359 memset(oparams, 0, sizeof(*oparams));
3360 oparams->flags = params->flags;
3361 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3362 oparams->masks[i] = params->masks[i].bits[0];
3363 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3364 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3365 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3366 oparams->info = params->info;
3367 oparams->msbits = params->msbits;
3368 oparams->rate_num = params->rate_num;
3369 oparams->rate_den = params->rate_den;
3370 oparams->fifo_size = params->fifo_size;
3371 }
3372
3373 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3374 struct snd_pcm_hw_params_old __user * _oparams)
3375 {
3376 struct snd_pcm_hw_params *params;
3377 struct snd_pcm_hw_params_old *oparams = NULL;
3378 int err;
3379
3380 params = kmalloc(sizeof(*params), GFP_KERNEL);
3381 if (!params)
3382 return -ENOMEM;
3383
3384 oparams = memdup_user(_oparams, sizeof(*oparams));
3385 if (IS_ERR(oparams)) {
3386 err = PTR_ERR(oparams);
3387 goto out;
3388 }
3389 snd_pcm_hw_convert_from_old_params(params, oparams);
3390 err = snd_pcm_hw_refine(substream, params);
3391 snd_pcm_hw_convert_to_old_params(oparams, params);
3392 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3393 if (!err)
3394 err = -EFAULT;
3395 }
3396
3397 kfree(oparams);
3398 out:
3399 kfree(params);
3400 return err;
3401 }
3402
3403 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3404 struct snd_pcm_hw_params_old __user * _oparams)
3405 {
3406 struct snd_pcm_hw_params *params;
3407 struct snd_pcm_hw_params_old *oparams = NULL;
3408 int err;
3409
3410 params = kmalloc(sizeof(*params), GFP_KERNEL);
3411 if (!params)
3412 return -ENOMEM;
3413
3414 oparams = memdup_user(_oparams, sizeof(*oparams));
3415 if (IS_ERR(oparams)) {
3416 err = PTR_ERR(oparams);
3417 goto out;
3418 }
3419 snd_pcm_hw_convert_from_old_params(params, oparams);
3420 err = snd_pcm_hw_params(substream, params);
3421 snd_pcm_hw_convert_to_old_params(oparams, params);
3422 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3423 if (!err)
3424 err = -EFAULT;
3425 }
3426
3427 kfree(oparams);
3428 out:
3429 kfree(params);
3430 return err;
3431 }
3432 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3433
3434 #ifndef CONFIG_MMU
3435 static unsigned long snd_pcm_get_unmapped_area(struct file *file,
3436 unsigned long addr,
3437 unsigned long len,
3438 unsigned long pgoff,
3439 unsigned long flags)
3440 {
3441 struct snd_pcm_file *pcm_file = file->private_data;
3442 struct snd_pcm_substream *substream = pcm_file->substream;
3443 struct snd_pcm_runtime *runtime = substream->runtime;
3444 unsigned long offset = pgoff << PAGE_SHIFT;
3445
3446 switch (offset) {
3447 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3448 return (unsigned long)runtime->status;
3449 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3450 return (unsigned long)runtime->control;
3451 default:
3452 return (unsigned long)runtime->dma_area + offset;
3453 }
3454 }
3455 #else
3456 # define snd_pcm_get_unmapped_area NULL
3457 #endif
3458
3459 /*
3460 * Register section
3461 */
3462
3463 const struct file_operations snd_pcm_f_ops[2] = {
3464 {
3465 .owner = THIS_MODULE,
3466 .write = snd_pcm_write,
3467 .aio_write = snd_pcm_aio_write,
3468 .open = snd_pcm_playback_open,
3469 .release = snd_pcm_release,
3470 .llseek = no_llseek,
3471 .poll = snd_pcm_playback_poll,
3472 .unlocked_ioctl = snd_pcm_playback_ioctl,
3473 .compat_ioctl = snd_pcm_ioctl_compat,
3474 .mmap = snd_pcm_mmap,
3475 .fasync = snd_pcm_fasync,
3476 .get_unmapped_area = snd_pcm_get_unmapped_area,
3477 },
3478 {
3479 .owner = THIS_MODULE,
3480 .read = snd_pcm_read,
3481 .aio_read = snd_pcm_aio_read,
3482 .open = snd_pcm_capture_open,
3483 .release = snd_pcm_release,
3484 .llseek = no_llseek,
3485 .poll = snd_pcm_capture_poll,
3486 .unlocked_ioctl = snd_pcm_capture_ioctl,
3487 .compat_ioctl = snd_pcm_ioctl_compat,
3488 .mmap = snd_pcm_mmap,
3489 .fasync = snd_pcm_fasync,
3490 .get_unmapped_area = snd_pcm_get_unmapped_area,
3491 }
3492 };
Linux with added FPC-III support