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[PATCH] Optimize PDA accesses slightly
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / sound / core / pcm_native.c
blob0224c70414f516a9666966f38c4b83aa0d5e44e4
1 /*
2 * Digital Audio (PCM) abstract layer
3 * Copyright (c) by Jaroslav Kysela <perex@suse.cz>
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
22 #include <sound/driver.h>
23 #include <linux/mm.h>
24 #include <linux/smp_lock.h>
25 #include <linux/file.h>
26 #include <linux/slab.h>
27 #include <linux/time.h>
28 #include <linux/uio.h>
29 #include <sound/core.h>
30 #include <sound/control.h>
31 #include <sound/info.h>
32 #include <sound/pcm.h>
33 #include <sound/pcm_params.h>
34 #include <sound/timer.h>
35 #include <sound/minors.h>
36 #include <asm/io.h>
37
38 /*
39 * Compatibility
40 */
41
42 struct snd_pcm_hw_params_old {
43 unsigned int flags;
44 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
45 SNDRV_PCM_HW_PARAM_ACCESS + 1];
46 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
47 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
48 unsigned int rmask;
49 unsigned int cmask;
50 unsigned int info;
51 unsigned int msbits;
52 unsigned int rate_num;
53 unsigned int rate_den;
54 snd_pcm_uframes_t fifo_size;
55 unsigned char reserved[64];
56 };
57
58 #ifdef CONFIG_SND_SUPPORT_OLD_API
59 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
60 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
61
62 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
63 struct snd_pcm_hw_params_old __user * _oparams);
64 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
65 struct snd_pcm_hw_params_old __user * _oparams);
66 #endif
67 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
68
69 /*
70 *
71 */
72
73 DEFINE_RWLOCK(snd_pcm_link_rwlock);
74 EXPORT_SYMBOL(snd_pcm_link_rwlock);
75
76 static DECLARE_RWSEM(snd_pcm_link_rwsem);
77
78 static inline mm_segment_t snd_enter_user(void)
79 {
80 mm_segment_t fs = get_fs();
81 set_fs(get_ds());
82 return fs;
83 }
84
85 static inline void snd_leave_user(mm_segment_t fs)
86 {
87 set_fs(fs);
88 }
89
90
91
92 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
93 {
94 struct snd_pcm_runtime *runtime;
95 struct snd_pcm *pcm = substream->pcm;
96 struct snd_pcm_str *pstr = substream->pstr;
97
98 snd_assert(substream != NULL, return -ENXIO);
99 memset(info, 0, sizeof(*info));
100 info->card = pcm->card->number;
101 info->device = pcm->device;
102 info->stream = substream->stream;
103 info->subdevice = substream->number;
104 strlcpy(info->id, pcm->id, sizeof(info->id));
105 strlcpy(info->name, pcm->name, sizeof(info->name));
106 info->dev_class = pcm->dev_class;
107 info->dev_subclass = pcm->dev_subclass;
108 info->subdevices_count = pstr->substream_count;
109 info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
110 strlcpy(info->subname, substream->name, sizeof(info->subname));
111 runtime = substream->runtime;
112 /* AB: FIXME!!! This is definitely nonsense */
113 if (runtime) {
114 info->sync = runtime->sync;
115 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
116 }
117 return 0;
118 }
119
120 int snd_pcm_info_user(struct snd_pcm_substream *substream,
121 struct snd_pcm_info __user * _info)
122 {
123 struct snd_pcm_info *info;
124 int err;
125
126 info = kmalloc(sizeof(*info), GFP_KERNEL);
127 if (! info)
128 return -ENOMEM;
129 err = snd_pcm_info(substream, info);
130 if (err >= 0) {
131 if (copy_to_user(_info, info, sizeof(*info)))
132 err = -EFAULT;
133 }
134 kfree(info);
135 return err;
136 }
137
138 #undef RULES_DEBUG
139
140 #ifdef RULES_DEBUG
141 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
142 char *snd_pcm_hw_param_names[] = {
143 HW_PARAM(ACCESS),
144 HW_PARAM(FORMAT),
145 HW_PARAM(SUBFORMAT),
146 HW_PARAM(SAMPLE_BITS),
147 HW_PARAM(FRAME_BITS),
148 HW_PARAM(CHANNELS),
149 HW_PARAM(RATE),
150 HW_PARAM(PERIOD_TIME),
151 HW_PARAM(PERIOD_SIZE),
152 HW_PARAM(PERIOD_BYTES),
153 HW_PARAM(PERIODS),
154 HW_PARAM(BUFFER_TIME),
155 HW_PARAM(BUFFER_SIZE),
156 HW_PARAM(BUFFER_BYTES),
157 HW_PARAM(TICK_TIME),
158 };
159 #endif
160
161 int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
162 struct snd_pcm_hw_params *params)
163 {
164 unsigned int k;
165 struct snd_pcm_hardware *hw;
166 struct snd_interval *i = NULL;
167 struct snd_mask *m = NULL;
168 struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
169 unsigned int rstamps[constrs->rules_num];
170 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
171 unsigned int stamp = 2;
172 int changed, again;
173
174 params->info = 0;
175 params->fifo_size = 0;
176 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
177 params->msbits = 0;
178 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
179 params->rate_num = 0;
180 params->rate_den = 0;
181 }
182
183 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
184 m = hw_param_mask(params, k);
185 if (snd_mask_empty(m))
186 return -EINVAL;
187 if (!(params->rmask & (1 << k)))
188 continue;
189 #ifdef RULES_DEBUG
190 printk("%s = ", snd_pcm_hw_param_names[k]);
191 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
192 #endif
193 changed = snd_mask_refine(m, constrs_mask(constrs, k));
194 #ifdef RULES_DEBUG
195 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
196 #endif
197 if (changed)
198 params->cmask |= 1 << k;
199 if (changed < 0)
200 return changed;
201 }
202
203 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
204 i = hw_param_interval(params, k);
205 if (snd_interval_empty(i))
206 return -EINVAL;
207 if (!(params->rmask & (1 << k)))
208 continue;
209 #ifdef RULES_DEBUG
210 printk("%s = ", snd_pcm_hw_param_names[k]);
211 if (i->empty)
212 printk("empty");
213 else
214 printk("%c%u %u%c",
215 i->openmin ? '(' : '[', i->min,
216 i->max, i->openmax ? ')' : ']');
217 printk(" -> ");
218 #endif
219 changed = snd_interval_refine(i, constrs_interval(constrs, k));
220 #ifdef RULES_DEBUG
221 if (i->empty)
222 printk("empty\n");
223 else
224 printk("%c%u %u%c\n",
225 i->openmin ? '(' : '[', i->min,
226 i->max, i->openmax ? ')' : ']');
227 #endif
228 if (changed)
229 params->cmask |= 1 << k;
230 if (changed < 0)
231 return changed;
232 }
233
234 for (k = 0; k < constrs->rules_num; k++)
235 rstamps[k] = 0;
236 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
237 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
238 do {
239 again = 0;
240 for (k = 0; k < constrs->rules_num; k++) {
241 struct snd_pcm_hw_rule *r = &constrs->rules[k];
242 unsigned int d;
243 int doit = 0;
244 if (r->cond && !(r->cond & params->flags))
245 continue;
246 for (d = 0; r->deps[d] >= 0; d++) {
247 if (vstamps[r->deps[d]] > rstamps[k]) {
248 doit = 1;
249 break;
250 }
251 }
252 if (!doit)
253 continue;
254 #ifdef RULES_DEBUG
255 printk("Rule %d [%p]: ", k, r->func);
256 if (r->var >= 0) {
257 printk("%s = ", snd_pcm_hw_param_names[r->var]);
258 if (hw_is_mask(r->var)) {
259 m = hw_param_mask(params, r->var);
260 printk("%x", *m->bits);
261 } else {
262 i = hw_param_interval(params, r->var);
263 if (i->empty)
264 printk("empty");
265 else
266 printk("%c%u %u%c",
267 i->openmin ? '(' : '[', i->min,
268 i->max, i->openmax ? ')' : ']');
269 }
270 }
271 #endif
272 changed = r->func(params, r);
273 #ifdef RULES_DEBUG
274 if (r->var >= 0) {
275 printk(" -> ");
276 if (hw_is_mask(r->var))
277 printk("%x", *m->bits);
278 else {
279 if (i->empty)
280 printk("empty");
281 else
282 printk("%c%u %u%c",
283 i->openmin ? '(' : '[', i->min,
284 i->max, i->openmax ? ')' : ']');
285 }
286 }
287 printk("\n");
288 #endif
289 rstamps[k] = stamp;
290 if (changed && r->var >= 0) {
291 params->cmask |= (1 << r->var);
292 vstamps[r->var] = stamp;
293 again = 1;
294 }
295 if (changed < 0)
296 return changed;
297 stamp++;
298 }
299 } while (again);
300 if (!params->msbits) {
301 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
302 if (snd_interval_single(i))
303 params->msbits = snd_interval_value(i);
304 }
305
306 if (!params->rate_den) {
307 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
308 if (snd_interval_single(i)) {
309 params->rate_num = snd_interval_value(i);
310 params->rate_den = 1;
311 }
312 }
313
314 hw = &substream->runtime->hw;
315 if (!params->info)
316 params->info = hw->info;
317 if (!params->fifo_size)
318 params->fifo_size = hw->fifo_size;
319 params->rmask = 0;
320 return 0;
321 }
322
323 EXPORT_SYMBOL(snd_pcm_hw_refine);
324
325 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
326 struct snd_pcm_hw_params __user * _params)
327 {
328 struct snd_pcm_hw_params *params;
329 int err;
330
331 params = kmalloc(sizeof(*params), GFP_KERNEL);
332 if (!params) {
333 err = -ENOMEM;
334 goto out;
335 }
336 if (copy_from_user(params, _params, sizeof(*params))) {
337 err = -EFAULT;
338 goto out;
339 }
340 err = snd_pcm_hw_refine(substream, params);
341 if (copy_to_user(_params, params, sizeof(*params))) {
342 if (!err)
343 err = -EFAULT;
344 }
345 out:
346 kfree(params);
347 return err;
348 }
349
350 static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
351 struct snd_pcm_hw_params *params)
352 {
353 struct snd_pcm_runtime *runtime;
354 int err;
355 unsigned int bits;
356 snd_pcm_uframes_t frames;
357
358 snd_assert(substream != NULL, return -ENXIO);
359 runtime = substream->runtime;
360 snd_assert(runtime != NULL, return -ENXIO);
361 snd_pcm_stream_lock_irq(substream);
362 switch (runtime->status->state) {
363 case SNDRV_PCM_STATE_OPEN:
364 case SNDRV_PCM_STATE_SETUP:
365 case SNDRV_PCM_STATE_PREPARED:
366 break;
367 default:
368 snd_pcm_stream_unlock_irq(substream);
369 return -EBADFD;
370 }
371 snd_pcm_stream_unlock_irq(substream);
372 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
373 if (!substream->oss.oss)
374 #endif
375 if (atomic_read(&substream->mmap_count))
376 return -EBADFD;
377
378 params->rmask = ~0U;
379 err = snd_pcm_hw_refine(substream, params);
380 if (err < 0)
381 goto _error;
382
383 err = snd_pcm_hw_params_choose(substream, params);
384 if (err < 0)
385 goto _error;
386
387 if (substream->ops->hw_params != NULL) {
388 err = substream->ops->hw_params(substream, params);
389 if (err < 0)
390 goto _error;
391 }
392
393 runtime->access = params_access(params);
394 runtime->format = params_format(params);
395 runtime->subformat = params_subformat(params);
396 runtime->channels = params_channels(params);
397 runtime->rate = params_rate(params);
398 runtime->period_size = params_period_size(params);
399 runtime->periods = params_periods(params);
400 runtime->buffer_size = params_buffer_size(params);
401 runtime->tick_time = params_tick_time(params);
402 runtime->info = params->info;
403 runtime->rate_num = params->rate_num;
404 runtime->rate_den = params->rate_den;
405
406 bits = snd_pcm_format_physical_width(runtime->format);
407 runtime->sample_bits = bits;
408 bits *= runtime->channels;
409 runtime->frame_bits = bits;
410 frames = 1;
411 while (bits % 8 != 0) {
412 bits *= 2;
413 frames *= 2;
414 }
415 runtime->byte_align = bits / 8;
416 runtime->min_align = frames;
417
418 /* Default sw params */
419 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
420 runtime->period_step = 1;
421 runtime->sleep_min = 0;
422 runtime->control->avail_min = runtime->period_size;
423 runtime->xfer_align = runtime->period_size;
424 runtime->start_threshold = 1;
425 runtime->stop_threshold = runtime->buffer_size;
426 runtime->silence_threshold = 0;
427 runtime->silence_size = 0;
428 runtime->boundary = runtime->buffer_size;
429 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
430 runtime->boundary *= 2;
431
432 snd_pcm_timer_resolution_change(substream);
433 runtime->status->state = SNDRV_PCM_STATE_SETUP;
434 return 0;
435 _error:
436 /* hardware might be unuseable from this time,
437 so we force application to retry to set
438 the correct hardware parameter settings */
439 runtime->status->state = SNDRV_PCM_STATE_OPEN;
440 if (substream->ops->hw_free != NULL)
441 substream->ops->hw_free(substream);
442 return err;
443 }
444
445 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
446 struct snd_pcm_hw_params __user * _params)
447 {
448 struct snd_pcm_hw_params *params;
449 int err;
450
451 params = kmalloc(sizeof(*params), GFP_KERNEL);
452 if (!params) {
453 err = -ENOMEM;
454 goto out;
455 }
456 if (copy_from_user(params, _params, sizeof(*params))) {
457 err = -EFAULT;
458 goto out;
459 }
460 err = snd_pcm_hw_params(substream, params);
461 if (copy_to_user(_params, params, sizeof(*params))) {
462 if (!err)
463 err = -EFAULT;
464 }
465 out:
466 kfree(params);
467 return err;
468 }
469
470 static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
471 {
472 struct snd_pcm_runtime *runtime;
473 int result = 0;
474
475 snd_assert(substream != NULL, return -ENXIO);
476 runtime = substream->runtime;
477 snd_assert(runtime != NULL, return -ENXIO);
478 snd_pcm_stream_lock_irq(substream);
479 switch (runtime->status->state) {
480 case SNDRV_PCM_STATE_SETUP:
481 case SNDRV_PCM_STATE_PREPARED:
482 break;
483 default:
484 snd_pcm_stream_unlock_irq(substream);
485 return -EBADFD;
486 }
487 snd_pcm_stream_unlock_irq(substream);
488 if (atomic_read(&substream->mmap_count))
489 return -EBADFD;
490 if (substream->ops->hw_free)
491 result = substream->ops->hw_free(substream);
492 runtime->status->state = SNDRV_PCM_STATE_OPEN;
493 return result;
494 }
495
496 static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
497 struct snd_pcm_sw_params *params)
498 {
499 struct snd_pcm_runtime *runtime;
500
501 snd_assert(substream != NULL, return -ENXIO);
502 runtime = substream->runtime;
503 snd_assert(runtime != NULL, return -ENXIO);
504 snd_pcm_stream_lock_irq(substream);
505 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
506 snd_pcm_stream_unlock_irq(substream);
507 return -EBADFD;
508 }
509 snd_pcm_stream_unlock_irq(substream);
510
511 if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
512 return -EINVAL;
513 if (params->avail_min == 0)
514 return -EINVAL;
515 if (params->xfer_align == 0 ||
516 params->xfer_align % runtime->min_align != 0)
517 return -EINVAL;
518 if (params->silence_size >= runtime->boundary) {
519 if (params->silence_threshold != 0)
520 return -EINVAL;
521 } else {
522 if (params->silence_size > params->silence_threshold)
523 return -EINVAL;
524 if (params->silence_threshold > runtime->buffer_size)
525 return -EINVAL;
526 }
527 snd_pcm_stream_lock_irq(substream);
528 runtime->tstamp_mode = params->tstamp_mode;
529 runtime->sleep_min = params->sleep_min;
530 runtime->period_step = params->period_step;
531 runtime->control->avail_min = params->avail_min;
532 runtime->start_threshold = params->start_threshold;
533 runtime->stop_threshold = params->stop_threshold;
534 runtime->silence_threshold = params->silence_threshold;
535 runtime->silence_size = params->silence_size;
536 runtime->xfer_align = params->xfer_align;
537 params->boundary = runtime->boundary;
538 if (snd_pcm_running(substream)) {
539 if (runtime->sleep_min)
540 snd_pcm_tick_prepare(substream);
541 else
542 snd_pcm_tick_set(substream, 0);
543 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
544 runtime->silence_size > 0)
545 snd_pcm_playback_silence(substream, ULONG_MAX);
546 wake_up(&runtime->sleep);
547 }
548 snd_pcm_stream_unlock_irq(substream);
549 return 0;
550 }
551
552 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
553 struct snd_pcm_sw_params __user * _params)
554 {
555 struct snd_pcm_sw_params params;
556 int err;
557 if (copy_from_user(&params, _params, sizeof(params)))
558 return -EFAULT;
559 err = snd_pcm_sw_params(substream, &params);
560 if (copy_to_user(_params, &params, sizeof(params)))
561 return -EFAULT;
562 return err;
563 }
564
565 int snd_pcm_status(struct snd_pcm_substream *substream,
566 struct snd_pcm_status *status)
567 {
568 struct snd_pcm_runtime *runtime = substream->runtime;
569
570 snd_pcm_stream_lock_irq(substream);
571 status->state = runtime->status->state;
572 status->suspended_state = runtime->status->suspended_state;
573 if (status->state == SNDRV_PCM_STATE_OPEN)
574 goto _end;
575 status->trigger_tstamp = runtime->trigger_tstamp;
576 if (snd_pcm_running(substream)) {
577 snd_pcm_update_hw_ptr(substream);
578 if (runtime->tstamp_mode & SNDRV_PCM_TSTAMP_MMAP)
579 status->tstamp = runtime->status->tstamp;
580 else
581 getnstimeofday(&status->tstamp);
582 } else
583 getnstimeofday(&status->tstamp);
584 status->appl_ptr = runtime->control->appl_ptr;
585 status->hw_ptr = runtime->status->hw_ptr;
586 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
587 status->avail = snd_pcm_playback_avail(runtime);
588 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
589 runtime->status->state == SNDRV_PCM_STATE_DRAINING)
590 status->delay = runtime->buffer_size - status->avail;
591 else
592 status->delay = 0;
593 } else {
594 status->avail = snd_pcm_capture_avail(runtime);
595 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
596 status->delay = status->avail;
597 else
598 status->delay = 0;
599 }
600 status->avail_max = runtime->avail_max;
601 status->overrange = runtime->overrange;
602 runtime->avail_max = 0;
603 runtime->overrange = 0;
604 _end:
605 snd_pcm_stream_unlock_irq(substream);
606 return 0;
607 }
608
609 static int snd_pcm_status_user(struct snd_pcm_substream *substream,
610 struct snd_pcm_status __user * _status)
611 {
612 struct snd_pcm_status status;
613 struct snd_pcm_runtime *runtime;
614 int res;
615
616 snd_assert(substream != NULL, return -ENXIO);
617 runtime = substream->runtime;
618 memset(&status, 0, sizeof(status));
619 res = snd_pcm_status(substream, &status);
620 if (res < 0)
621 return res;
622 if (copy_to_user(_status, &status, sizeof(status)))
623 return -EFAULT;
624 return 0;
625 }
626
627 static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
628 struct snd_pcm_channel_info * info)
629 {
630 struct snd_pcm_runtime *runtime;
631 unsigned int channel;
632
633 snd_assert(substream != NULL, return -ENXIO);
634 channel = info->channel;
635 runtime = substream->runtime;
636 snd_pcm_stream_lock_irq(substream);
637 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
638 snd_pcm_stream_unlock_irq(substream);
639 return -EBADFD;
640 }
641 snd_pcm_stream_unlock_irq(substream);
642 if (channel >= runtime->channels)
643 return -EINVAL;
644 memset(info, 0, sizeof(*info));
645 info->channel = channel;
646 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
647 }
648
649 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
650 struct snd_pcm_channel_info __user * _info)
651 {
652 struct snd_pcm_channel_info info;
653 int res;
654
655 if (copy_from_user(&info, _info, sizeof(info)))
656 return -EFAULT;
657 res = snd_pcm_channel_info(substream, &info);
658 if (res < 0)
659 return res;
660 if (copy_to_user(_info, &info, sizeof(info)))
661 return -EFAULT;
662 return 0;
663 }
664
665 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
666 {
667 struct snd_pcm_runtime *runtime = substream->runtime;
668 if (runtime->trigger_master == NULL)
669 return;
670 if (runtime->trigger_master == substream) {
671 getnstimeofday(&runtime->trigger_tstamp);
672 } else {
673 snd_pcm_trigger_tstamp(runtime->trigger_master);
674 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
675 }
676 runtime->trigger_master = NULL;
677 }
678
679 struct action_ops {
680 int (*pre_action)(struct snd_pcm_substream *substream, int state);
681 int (*do_action)(struct snd_pcm_substream *substream, int state);
682 void (*undo_action)(struct snd_pcm_substream *substream, int state);
683 void (*post_action)(struct snd_pcm_substream *substream, int state);
684 };
685
686 /*
687 * this functions is core for handling of linked stream
688 * Note: the stream state might be changed also on failure
689 * Note2: call with calling stream lock + link lock
690 */
691 static int snd_pcm_action_group(struct action_ops *ops,
692 struct snd_pcm_substream *substream,
693 int state, int do_lock)
694 {
695 struct list_head *pos;
696 struct snd_pcm_substream *s = NULL;
697 struct snd_pcm_substream *s1;
698 int res = 0;
699
700 snd_pcm_group_for_each(pos, substream) {
701 s = snd_pcm_group_substream_entry(pos);
702 if (do_lock && s != substream)
703 spin_lock(&s->self_group.lock);
704 res = ops->pre_action(s, state);
705 if (res < 0)
706 goto _unlock;
707 }
708 snd_pcm_group_for_each(pos, substream) {
709 s = snd_pcm_group_substream_entry(pos);
710 res = ops->do_action(s, state);
711 if (res < 0) {
712 if (ops->undo_action) {
713 snd_pcm_group_for_each(pos, substream) {
714 s1 = snd_pcm_group_substream_entry(pos);
715 if (s1 == s) /* failed stream */
716 break;
717 ops->undo_action(s1, state);
718 }
719 }
720 s = NULL; /* unlock all */
721 goto _unlock;
722 }
723 }
724 snd_pcm_group_for_each(pos, substream) {
725 s = snd_pcm_group_substream_entry(pos);
726 ops->post_action(s, state);
727 }
728 _unlock:
729 if (do_lock) {
730 /* unlock streams */
731 snd_pcm_group_for_each(pos, substream) {
732 s1 = snd_pcm_group_substream_entry(pos);
733 if (s1 != substream)
734 spin_unlock(&s1->self_group.lock);
735 if (s1 == s) /* end */
736 break;
737 }
738 }
739 return res;
740 }
741
742 /*
743 * Note: call with stream lock
744 */
745 static int snd_pcm_action_single(struct action_ops *ops,
746 struct snd_pcm_substream *substream,
747 int state)
748 {
749 int res;
750
751 res = ops->pre_action(substream, state);
752 if (res < 0)
753 return res;
754 res = ops->do_action(substream, state);
755 if (res == 0)
756 ops->post_action(substream, state);
757 else if (ops->undo_action)
758 ops->undo_action(substream, state);
759 return res;
760 }
761
762 /*
763 * Note: call with stream lock
764 */
765 static int snd_pcm_action(struct action_ops *ops,
766 struct snd_pcm_substream *substream,
767 int state)
768 {
769 int res;
770
771 if (snd_pcm_stream_linked(substream)) {
772 if (!spin_trylock(&substream->group->lock)) {
773 spin_unlock(&substream->self_group.lock);
774 spin_lock(&substream->group->lock);
775 spin_lock(&substream->self_group.lock);
776 }
777 res = snd_pcm_action_group(ops, substream, state, 1);
778 spin_unlock(&substream->group->lock);
779 } else {
780 res = snd_pcm_action_single(ops, substream, state);
781 }
782 return res;
783 }
784
785 /*
786 * Note: don't use any locks before
787 */
788 static int snd_pcm_action_lock_irq(struct action_ops *ops,
789 struct snd_pcm_substream *substream,
790 int state)
791 {
792 int res;
793
794 read_lock_irq(&snd_pcm_link_rwlock);
795 if (snd_pcm_stream_linked(substream)) {
796 spin_lock(&substream->group->lock);
797 spin_lock(&substream->self_group.lock);
798 res = snd_pcm_action_group(ops, substream, state, 1);
799 spin_unlock(&substream->self_group.lock);
800 spin_unlock(&substream->group->lock);
801 } else {
802 spin_lock(&substream->self_group.lock);
803 res = snd_pcm_action_single(ops, substream, state);
804 spin_unlock(&substream->self_group.lock);
805 }
806 read_unlock_irq(&snd_pcm_link_rwlock);
807 return res;
808 }
809
810 /*
811 */
812 static int snd_pcm_action_nonatomic(struct action_ops *ops,
813 struct snd_pcm_substream *substream,
814 int state)
815 {
816 int res;
817
818 down_read(&snd_pcm_link_rwsem);
819 if (snd_pcm_stream_linked(substream))
820 res = snd_pcm_action_group(ops, substream, state, 0);
821 else
822 res = snd_pcm_action_single(ops, substream, state);
823 up_read(&snd_pcm_link_rwsem);
824 return res;
825 }
826
827 /*
828 * start callbacks
829 */
830 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
831 {
832 struct snd_pcm_runtime *runtime = substream->runtime;
833 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
834 return -EBADFD;
835 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
836 !snd_pcm_playback_data(substream))
837 return -EPIPE;
838 runtime->trigger_master = substream;
839 return 0;
840 }
841
842 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
843 {
844 if (substream->runtime->trigger_master != substream)
845 return 0;
846 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
847 }
848
849 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
850 {
851 if (substream->runtime->trigger_master == substream)
852 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
853 }
854
855 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
856 {
857 struct snd_pcm_runtime *runtime = substream->runtime;
858 snd_pcm_trigger_tstamp(substream);
859 runtime->status->state = state;
860 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
861 runtime->silence_size > 0)
862 snd_pcm_playback_silence(substream, ULONG_MAX);
863 if (runtime->sleep_min)
864 snd_pcm_tick_prepare(substream);
865 if (substream->timer)
866 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
867 &runtime->trigger_tstamp);
868 }
869
870 static struct action_ops snd_pcm_action_start = {
871 .pre_action = snd_pcm_pre_start,
872 .do_action = snd_pcm_do_start,
873 .undo_action = snd_pcm_undo_start,
874 .post_action = snd_pcm_post_start
875 };
876
877 /**
878 * snd_pcm_start
879 * @substream: the PCM substream instance
880 *
881 * Start all linked streams.
882 */
883 int snd_pcm_start(struct snd_pcm_substream *substream)
884 {
885 return snd_pcm_action(&snd_pcm_action_start, substream,
886 SNDRV_PCM_STATE_RUNNING);
887 }
888
889 /*
890 * stop callbacks
891 */
892 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
893 {
894 struct snd_pcm_runtime *runtime = substream->runtime;
895 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
896 return -EBADFD;
897 runtime->trigger_master = substream;
898 return 0;
899 }
900
901 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
902 {
903 if (substream->runtime->trigger_master == substream &&
904 snd_pcm_running(substream))
905 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
906 return 0; /* unconditonally stop all substreams */
907 }
908
909 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
910 {
911 struct snd_pcm_runtime *runtime = substream->runtime;
912 if (runtime->status->state != state) {
913 snd_pcm_trigger_tstamp(substream);
914 if (substream->timer)
915 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
916 &runtime->trigger_tstamp);
917 runtime->status->state = state;
918 snd_pcm_tick_set(substream, 0);
919 }
920 wake_up(&runtime->sleep);
921 }
922
923 static struct action_ops snd_pcm_action_stop = {
924 .pre_action = snd_pcm_pre_stop,
925 .do_action = snd_pcm_do_stop,
926 .post_action = snd_pcm_post_stop
927 };
928
929 /**
930 * snd_pcm_stop
931 * @substream: the PCM substream instance
932 * @state: PCM state after stopping the stream
933 *
934 * Try to stop all running streams in the substream group.
935 * The state of each stream is changed to the given value after that unconditionally.
936 */
937 int snd_pcm_stop(struct snd_pcm_substream *substream, int state)
938 {
939 return snd_pcm_action(&snd_pcm_action_stop, substream, state);
940 }
941
942 EXPORT_SYMBOL(snd_pcm_stop);
943
944 /**
945 * snd_pcm_drain_done
946 * @substream: the PCM substream
947 *
948 * Stop the DMA only when the given stream is playback.
949 * The state is changed to SETUP.
950 * Unlike snd_pcm_stop(), this affects only the given stream.
951 */
952 int snd_pcm_drain_done(struct snd_pcm_substream *substream)
953 {
954 return snd_pcm_action_single(&snd_pcm_action_stop, substream,
955 SNDRV_PCM_STATE_SETUP);
956 }
957
958 /*
959 * pause callbacks
960 */
961 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
962 {
963 struct snd_pcm_runtime *runtime = substream->runtime;
964 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
965 return -ENOSYS;
966 if (push) {
967 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
968 return -EBADFD;
969 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
970 return -EBADFD;
971 runtime->trigger_master = substream;
972 return 0;
973 }
974
975 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
976 {
977 if (substream->runtime->trigger_master != substream)
978 return 0;
979 return substream->ops->trigger(substream,
980 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
981 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
982 }
983
984 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
985 {
986 if (substream->runtime->trigger_master == substream)
987 substream->ops->trigger(substream,
988 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
989 SNDRV_PCM_TRIGGER_PAUSE_PUSH);
990 }
991
992 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
993 {
994 struct snd_pcm_runtime *runtime = substream->runtime;
995 snd_pcm_trigger_tstamp(substream);
996 if (push) {
997 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
998 if (substream->timer)
999 snd_timer_notify(substream->timer,
1000 SNDRV_TIMER_EVENT_MPAUSE,
1001 &runtime->trigger_tstamp);
1002 snd_pcm_tick_set(substream, 0);
1003 wake_up(&runtime->sleep);
1004 } else {
1005 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1006 if (runtime->sleep_min)
1007 snd_pcm_tick_prepare(substream);
1008 if (substream->timer)
1009 snd_timer_notify(substream->timer,
1010 SNDRV_TIMER_EVENT_MCONTINUE,
1011 &runtime->trigger_tstamp);
1012 }
1013 }
1014
1015 static struct action_ops snd_pcm_action_pause = {
1016 .pre_action = snd_pcm_pre_pause,
1017 .do_action = snd_pcm_do_pause,
1018 .undo_action = snd_pcm_undo_pause,
1019 .post_action = snd_pcm_post_pause
1020 };
1021
1022 /*
1023 * Push/release the pause for all linked streams.
1024 */
1025 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1026 {
1027 return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1028 }
1029
1030 #ifdef CONFIG_PM
1031 /* suspend */
1032
1033 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1034 {
1035 struct snd_pcm_runtime *runtime = substream->runtime;
1036 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1037 return -EBUSY;
1038 runtime->trigger_master = substream;
1039 return 0;
1040 }
1041
1042 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1043 {
1044 struct snd_pcm_runtime *runtime = substream->runtime;
1045 if (runtime->trigger_master != substream)
1046 return 0;
1047 if (! snd_pcm_running(substream))
1048 return 0;
1049 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1050 return 0; /* suspend unconditionally */
1051 }
1052
1053 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1054 {
1055 struct snd_pcm_runtime *runtime = substream->runtime;
1056 snd_pcm_trigger_tstamp(substream);
1057 if (substream->timer)
1058 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1059 &runtime->trigger_tstamp);
1060 runtime->status->suspended_state = runtime->status->state;
1061 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1062 snd_pcm_tick_set(substream, 0);
1063 wake_up(&runtime->sleep);
1064 }
1065
1066 static struct action_ops snd_pcm_action_suspend = {
1067 .pre_action = snd_pcm_pre_suspend,
1068 .do_action = snd_pcm_do_suspend,
1069 .post_action = snd_pcm_post_suspend
1070 };
1071
1072 /**
1073 * snd_pcm_suspend
1074 * @substream: the PCM substream
1075 *
1076 * Trigger SUSPEND to all linked streams.
1077 * After this call, all streams are changed to SUSPENDED state.
1078 */
1079 int snd_pcm_suspend(struct snd_pcm_substream *substream)
1080 {
1081 int err;
1082 unsigned long flags;
1083
1084 if (! substream)
1085 return 0;
1086
1087 snd_pcm_stream_lock_irqsave(substream, flags);
1088 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1089 snd_pcm_stream_unlock_irqrestore(substream, flags);
1090 return err;
1091 }
1092
1093 EXPORT_SYMBOL(snd_pcm_suspend);
1094
1095 /**
1096 * snd_pcm_suspend_all
1097 * @pcm: the PCM instance
1098 *
1099 * Trigger SUSPEND to all substreams in the given pcm.
1100 * After this call, all streams are changed to SUSPENDED state.
1101 */
1102 int snd_pcm_suspend_all(struct snd_pcm *pcm)
1103 {
1104 struct snd_pcm_substream *substream;
1105 int stream, err = 0;
1106
1107 if (! pcm)
1108 return 0;
1109
1110 for (stream = 0; stream < 2; stream++) {
1111 for (substream = pcm->streams[stream].substream;
1112 substream; substream = substream->next) {
1113 /* FIXME: the open/close code should lock this as well */
1114 if (substream->runtime == NULL)
1115 continue;
1116 err = snd_pcm_suspend(substream);
1117 if (err < 0 && err != -EBUSY)
1118 return err;
1119 }
1120 }
1121 return 0;
1122 }
1123
1124 EXPORT_SYMBOL(snd_pcm_suspend_all);
1125
1126 /* resume */
1127
1128 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1129 {
1130 struct snd_pcm_runtime *runtime = substream->runtime;
1131 if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1132 return -ENOSYS;
1133 runtime->trigger_master = substream;
1134 return 0;
1135 }
1136
1137 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1138 {
1139 struct snd_pcm_runtime *runtime = substream->runtime;
1140 if (runtime->trigger_master != substream)
1141 return 0;
1142 /* DMA not running previously? */
1143 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1144 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1145 substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1146 return 0;
1147 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1148 }
1149
1150 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1151 {
1152 if (substream->runtime->trigger_master == substream &&
1153 snd_pcm_running(substream))
1154 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1155 }
1156
1157 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1158 {
1159 struct snd_pcm_runtime *runtime = substream->runtime;
1160 snd_pcm_trigger_tstamp(substream);
1161 if (substream->timer)
1162 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1163 &runtime->trigger_tstamp);
1164 runtime->status->state = runtime->status->suspended_state;
1165 if (runtime->sleep_min)
1166 snd_pcm_tick_prepare(substream);
1167 }
1168
1169 static struct action_ops snd_pcm_action_resume = {
1170 .pre_action = snd_pcm_pre_resume,
1171 .do_action = snd_pcm_do_resume,
1172 .undo_action = snd_pcm_undo_resume,
1173 .post_action = snd_pcm_post_resume
1174 };
1175
1176 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1177 {
1178 struct snd_card *card = substream->pcm->card;
1179 int res;
1180
1181 snd_power_lock(card);
1182 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1183 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1184 snd_power_unlock(card);
1185 return res;
1186 }
1187
1188 #else
1189
1190 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1191 {
1192 return -ENOSYS;
1193 }
1194
1195 #endif /* CONFIG_PM */
1196
1197 /*
1198 * xrun ioctl
1199 *
1200 * Change the RUNNING stream(s) to XRUN state.
1201 */
1202 static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1203 {
1204 struct snd_card *card = substream->pcm->card;
1205 struct snd_pcm_runtime *runtime = substream->runtime;
1206 int result;
1207
1208 snd_power_lock(card);
1209 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1210 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1211 if (result < 0)
1212 goto _unlock;
1213 }
1214
1215 snd_pcm_stream_lock_irq(substream);
1216 switch (runtime->status->state) {
1217 case SNDRV_PCM_STATE_XRUN:
1218 result = 0; /* already there */
1219 break;
1220 case SNDRV_PCM_STATE_RUNNING:
1221 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1222 break;
1223 default:
1224 result = -EBADFD;
1225 }
1226 snd_pcm_stream_unlock_irq(substream);
1227 _unlock:
1228 snd_power_unlock(card);
1229 return result;
1230 }
1231
1232 /*
1233 * reset ioctl
1234 */
1235 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1236 {
1237 struct snd_pcm_runtime *runtime = substream->runtime;
1238 switch (runtime->status->state) {
1239 case SNDRV_PCM_STATE_RUNNING:
1240 case SNDRV_PCM_STATE_PREPARED:
1241 case SNDRV_PCM_STATE_PAUSED:
1242 case SNDRV_PCM_STATE_SUSPENDED:
1243 return 0;
1244 default:
1245 return -EBADFD;
1246 }
1247 }
1248
1249 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1250 {
1251 struct snd_pcm_runtime *runtime = substream->runtime;
1252 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1253 if (err < 0)
1254 return err;
1255 // snd_assert(runtime->status->hw_ptr < runtime->buffer_size, );
1256 runtime->hw_ptr_base = 0;
1257 runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1258 runtime->status->hw_ptr % runtime->period_size;
1259 runtime->silence_start = runtime->status->hw_ptr;
1260 runtime->silence_filled = 0;
1261 return 0;
1262 }
1263
1264 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1265 {
1266 struct snd_pcm_runtime *runtime = substream->runtime;
1267 runtime->control->appl_ptr = runtime->status->hw_ptr;
1268 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1269 runtime->silence_size > 0)
1270 snd_pcm_playback_silence(substream, ULONG_MAX);
1271 }
1272
1273 static struct action_ops snd_pcm_action_reset = {
1274 .pre_action = snd_pcm_pre_reset,
1275 .do_action = snd_pcm_do_reset,
1276 .post_action = snd_pcm_post_reset
1277 };
1278
1279 static int snd_pcm_reset(struct snd_pcm_substream *substream)
1280 {
1281 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1282 }
1283
1284 /*
1285 * prepare ioctl
1286 */
1287 /* we use the second argument for updating f_flags */
1288 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1289 int f_flags)
1290 {
1291 struct snd_pcm_runtime *runtime = substream->runtime;
1292 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1293 return -EBADFD;
1294 if (snd_pcm_running(substream))
1295 return -EBUSY;
1296 substream->f_flags = f_flags;
1297 return 0;
1298 }
1299
1300 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1301 {
1302 int err;
1303 err = substream->ops->prepare(substream);
1304 if (err < 0)
1305 return err;
1306 return snd_pcm_do_reset(substream, 0);
1307 }
1308
1309 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1310 {
1311 struct snd_pcm_runtime *runtime = substream->runtime;
1312 runtime->control->appl_ptr = runtime->status->hw_ptr;
1313 runtime->status->state = SNDRV_PCM_STATE_PREPARED;
1314 }
1315
1316 static struct action_ops snd_pcm_action_prepare = {
1317 .pre_action = snd_pcm_pre_prepare,
1318 .do_action = snd_pcm_do_prepare,
1319 .post_action = snd_pcm_post_prepare
1320 };
1321
1322 /**
1323 * snd_pcm_prepare
1324 * @substream: the PCM substream instance
1325 * @file: file to refer f_flags
1326 *
1327 * Prepare the PCM substream to be triggerable.
1328 */
1329 static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1330 struct file *file)
1331 {
1332 int res;
1333 struct snd_card *card = substream->pcm->card;
1334 int f_flags;
1335
1336 if (file)
1337 f_flags = file->f_flags;
1338 else
1339 f_flags = substream->f_flags;
1340
1341 snd_power_lock(card);
1342 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1343 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1344 substream, f_flags);
1345 snd_power_unlock(card);
1346 return res;
1347 }
1348
1349 /*
1350 * drain ioctl
1351 */
1352
1353 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1354 {
1355 if (substream->f_flags & O_NONBLOCK)
1356 return -EAGAIN;
1357 substream->runtime->trigger_master = substream;
1358 return 0;
1359 }
1360
1361 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1362 {
1363 struct snd_pcm_runtime *runtime = substream->runtime;
1364 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1365 switch (runtime->status->state) {
1366 case SNDRV_PCM_STATE_PREPARED:
1367 /* start playback stream if possible */
1368 if (! snd_pcm_playback_empty(substream)) {
1369 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1370 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1371 }
1372 break;
1373 case SNDRV_PCM_STATE_RUNNING:
1374 runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1375 break;
1376 default:
1377 break;
1378 }
1379 } else {
1380 /* stop running stream */
1381 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1382 int state = snd_pcm_capture_avail(runtime) > 0 ?
1383 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1384 snd_pcm_do_stop(substream, state);
1385 snd_pcm_post_stop(substream, state);
1386 }
1387 }
1388 return 0;
1389 }
1390
1391 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1392 {
1393 }
1394
1395 static struct action_ops snd_pcm_action_drain_init = {
1396 .pre_action = snd_pcm_pre_drain_init,
1397 .do_action = snd_pcm_do_drain_init,
1398 .post_action = snd_pcm_post_drain_init
1399 };
1400
1401 struct drain_rec {
1402 struct snd_pcm_substream *substream;
1403 wait_queue_t wait;
1404 snd_pcm_uframes_t stop_threshold;
1405 };
1406
1407 static int snd_pcm_drop(struct snd_pcm_substream *substream);
1408
1409 /*
1410 * Drain the stream(s).
1411 * When the substream is linked, sync until the draining of all playback streams
1412 * is finished.
1413 * After this call, all streams are supposed to be either SETUP or DRAINING
1414 * (capture only) state.
1415 */
1416 static int snd_pcm_drain(struct snd_pcm_substream *substream)
1417 {
1418 struct snd_card *card;
1419 struct snd_pcm_runtime *runtime;
1420 struct list_head *pos;
1421 int result = 0;
1422 int i, num_drecs;
1423 struct drain_rec *drec, drec_tmp, *d;
1424
1425 snd_assert(substream != NULL, return -ENXIO);
1426 card = substream->pcm->card;
1427 runtime = substream->runtime;
1428
1429 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1430 return -EBADFD;
1431
1432 snd_power_lock(card);
1433 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1434 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1435 if (result < 0) {
1436 snd_power_unlock(card);
1437 return result;
1438 }
1439 }
1440
1441 /* allocate temporary record for drain sync */
1442 down_read(&snd_pcm_link_rwsem);
1443 if (snd_pcm_stream_linked(substream)) {
1444 drec = kmalloc(substream->group->count * sizeof(*drec), GFP_KERNEL);
1445 if (! drec) {
1446 up_read(&snd_pcm_link_rwsem);
1447 snd_power_unlock(card);
1448 return -ENOMEM;
1449 }
1450 } else
1451 drec = &drec_tmp;
1452
1453 /* count only playback streams */
1454 num_drecs = 0;
1455 snd_pcm_group_for_each(pos, substream) {
1456 struct snd_pcm_substream *s = snd_pcm_group_substream_entry(pos);
1457 runtime = s->runtime;
1458 if (s->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1459 d = &drec[num_drecs++];
1460 d->substream = s;
1461 init_waitqueue_entry(&d->wait, current);
1462 add_wait_queue(&runtime->sleep, &d->wait);
1463 /* stop_threshold fixup to avoid endless loop when
1464 * stop_threshold > buffer_size
1465 */
1466 d->stop_threshold = runtime->stop_threshold;
1467 if (runtime->stop_threshold > runtime->buffer_size)
1468 runtime->stop_threshold = runtime->buffer_size;
1469 }
1470 }
1471 up_read(&snd_pcm_link_rwsem);
1472
1473 snd_pcm_stream_lock_irq(substream);
1474 /* resume pause */
1475 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1476 snd_pcm_pause(substream, 0);
1477
1478 /* pre-start/stop - all running streams are changed to DRAINING state */
1479 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1480 if (result < 0) {
1481 snd_pcm_stream_unlock_irq(substream);
1482 goto _error;
1483 }
1484
1485 for (;;) {
1486 long tout;
1487 if (signal_pending(current)) {
1488 result = -ERESTARTSYS;
1489 break;
1490 }
1491 /* all finished? */
1492 for (i = 0; i < num_drecs; i++) {
1493 runtime = drec[i].substream->runtime;
1494 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING)
1495 break;
1496 }
1497 if (i == num_drecs)
1498 break; /* yes, all drained */
1499
1500 set_current_state(TASK_INTERRUPTIBLE);
1501 snd_pcm_stream_unlock_irq(substream);
1502 snd_power_unlock(card);
1503 tout = schedule_timeout(10 * HZ);
1504 snd_power_lock(card);
1505 snd_pcm_stream_lock_irq(substream);
1506 if (tout == 0) {
1507 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1508 result = -ESTRPIPE;
1509 else {
1510 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1511 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1512 result = -EIO;
1513 }
1514 break;
1515 }
1516 }
1517
1518 snd_pcm_stream_unlock_irq(substream);
1519
1520 _error:
1521 for (i = 0; i < num_drecs; i++) {
1522 d = &drec[i];
1523 runtime = d->substream->runtime;
1524 remove_wait_queue(&runtime->sleep, &d->wait);
1525 runtime->stop_threshold = d->stop_threshold;
1526 }
1527
1528 if (drec != &drec_tmp)
1529 kfree(drec);
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 struct snd_card *card;
1544 int result = 0;
1545
1546 snd_assert(substream != NULL, return -ENXIO);
1547 runtime = substream->runtime;
1548 card = substream->pcm->card;
1549
1550 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1551 return -EBADFD;
1552
1553 snd_power_lock(card);
1554 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1555 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1556 if (result < 0)
1557 goto _unlock;
1558 }
1559
1560 snd_pcm_stream_lock_irq(substream);
1561 /* resume pause */
1562 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1563 snd_pcm_pause(substream, 0);
1564
1565 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1566 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1567 snd_pcm_stream_unlock_irq(substream);
1568 _unlock:
1569 snd_power_unlock(card);
1570 return result;
1571 }
1572
1573
1574 /* WARNING: Don't forget to fput back the file */
1575 static struct file *snd_pcm_file_fd(int fd)
1576 {
1577 struct file *file;
1578 struct inode *inode;
1579 unsigned int minor;
1580
1581 file = fget(fd);
1582 if (!file)
1583 return NULL;
1584 inode = file->f_dentry->d_inode;
1585 if (!S_ISCHR(inode->i_mode) ||
1586 imajor(inode) != snd_major) {
1587 fput(file);
1588 return NULL;
1589 }
1590 minor = iminor(inode);
1591 if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) &&
1592 !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) {
1593 fput(file);
1594 return NULL;
1595 }
1596 return file;
1597 }
1598
1599 /*
1600 * PCM link handling
1601 */
1602 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1603 {
1604 int res = 0;
1605 struct file *file;
1606 struct snd_pcm_file *pcm_file;
1607 struct snd_pcm_substream *substream1;
1608
1609 file = snd_pcm_file_fd(fd);
1610 if (!file)
1611 return -EBADFD;
1612 pcm_file = file->private_data;
1613 substream1 = pcm_file->substream;
1614 down_write(&snd_pcm_link_rwsem);
1615 write_lock_irq(&snd_pcm_link_rwlock);
1616 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1617 substream->runtime->status->state != substream1->runtime->status->state) {
1618 res = -EBADFD;
1619 goto _end;
1620 }
1621 if (snd_pcm_stream_linked(substream1)) {
1622 res = -EALREADY;
1623 goto _end;
1624 }
1625 if (!snd_pcm_stream_linked(substream)) {
1626 substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC);
1627 if (substream->group == NULL) {
1628 res = -ENOMEM;
1629 goto _end;
1630 }
1631 spin_lock_init(&substream->group->lock);
1632 INIT_LIST_HEAD(&substream->group->substreams);
1633 list_add_tail(&substream->link_list, &substream->group->substreams);
1634 substream->group->count = 1;
1635 }
1636 list_add_tail(&substream1->link_list, &substream->group->substreams);
1637 substream->group->count++;
1638 substream1->group = substream->group;
1639 _end:
1640 write_unlock_irq(&snd_pcm_link_rwlock);
1641 up_write(&snd_pcm_link_rwsem);
1642 fput(file);
1643 return res;
1644 }
1645
1646 static void relink_to_local(struct snd_pcm_substream *substream)
1647 {
1648 substream->group = &substream->self_group;
1649 INIT_LIST_HEAD(&substream->self_group.substreams);
1650 list_add_tail(&substream->link_list, &substream->self_group.substreams);
1651 }
1652
1653 static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1654 {
1655 struct list_head *pos;
1656 int res = 0;
1657
1658 down_write(&snd_pcm_link_rwsem);
1659 write_lock_irq(&snd_pcm_link_rwlock);
1660 if (!snd_pcm_stream_linked(substream)) {
1661 res = -EALREADY;
1662 goto _end;
1663 }
1664 list_del(&substream->link_list);
1665 substream->group->count--;
1666 if (substream->group->count == 1) { /* detach the last stream, too */
1667 snd_pcm_group_for_each(pos, substream) {
1668 relink_to_local(snd_pcm_group_substream_entry(pos));
1669 break;
1670 }
1671 kfree(substream->group);
1672 }
1673 relink_to_local(substream);
1674 _end:
1675 write_unlock_irq(&snd_pcm_link_rwlock);
1676 up_write(&snd_pcm_link_rwsem);
1677 return res;
1678 }
1679
1680 /*
1681 * hw configurator
1682 */
1683 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1684 struct snd_pcm_hw_rule *rule)
1685 {
1686 struct snd_interval t;
1687 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1688 hw_param_interval_c(params, rule->deps[1]), &t);
1689 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1690 }
1691
1692 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1693 struct snd_pcm_hw_rule *rule)
1694 {
1695 struct snd_interval t;
1696 snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1697 hw_param_interval_c(params, rule->deps[1]), &t);
1698 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1699 }
1700
1701 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1702 struct snd_pcm_hw_rule *rule)
1703 {
1704 struct snd_interval t;
1705 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1706 hw_param_interval_c(params, rule->deps[1]),
1707 (unsigned long) rule->private, &t);
1708 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1709 }
1710
1711 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1712 struct snd_pcm_hw_rule *rule)
1713 {
1714 struct snd_interval t;
1715 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1716 (unsigned long) rule->private,
1717 hw_param_interval_c(params, rule->deps[1]), &t);
1718 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1719 }
1720
1721 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1722 struct snd_pcm_hw_rule *rule)
1723 {
1724 unsigned int k;
1725 struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1726 struct snd_mask m;
1727 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1728 snd_mask_any(&m);
1729 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1730 int bits;
1731 if (! snd_mask_test(mask, k))
1732 continue;
1733 bits = snd_pcm_format_physical_width(k);
1734 if (bits <= 0)
1735 continue; /* ignore invalid formats */
1736 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1737 snd_mask_reset(&m, k);
1738 }
1739 return snd_mask_refine(mask, &m);
1740 }
1741
1742 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1743 struct snd_pcm_hw_rule *rule)
1744 {
1745 struct snd_interval t;
1746 unsigned int k;
1747 t.min = UINT_MAX;
1748 t.max = 0;
1749 t.openmin = 0;
1750 t.openmax = 0;
1751 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1752 int bits;
1753 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1754 continue;
1755 bits = snd_pcm_format_physical_width(k);
1756 if (bits <= 0)
1757 continue; /* ignore invalid formats */
1758 if (t.min > (unsigned)bits)
1759 t.min = bits;
1760 if (t.max < (unsigned)bits)
1761 t.max = bits;
1762 }
1763 t.integer = 1;
1764 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1765 }
1766
1767 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1768 #error "Change this table"
1769 #endif
1770
1771 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1772 48000, 64000, 88200, 96000, 176400, 192000 };
1773
1774 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1775 struct snd_pcm_hw_rule *rule)
1776 {
1777 struct snd_pcm_hardware *hw = rule->private;
1778 return snd_interval_list(hw_param_interval(params, rule->var),
1779 ARRAY_SIZE(rates), rates, hw->rates);
1780 }
1781
1782 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1783 struct snd_pcm_hw_rule *rule)
1784 {
1785 struct snd_interval t;
1786 struct snd_pcm_substream *substream = rule->private;
1787 t.min = 0;
1788 t.max = substream->buffer_bytes_max;
1789 t.openmin = 0;
1790 t.openmax = 0;
1791 t.integer = 1;
1792 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1793 }
1794
1795 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1796 {
1797 struct snd_pcm_runtime *runtime = substream->runtime;
1798 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1799 int k, err;
1800
1801 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1802 snd_mask_any(constrs_mask(constrs, k));
1803 }
1804
1805 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1806 snd_interval_any(constrs_interval(constrs, k));
1807 }
1808
1809 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1810 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1811 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1812 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1813 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1814
1815 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1816 snd_pcm_hw_rule_format, NULL,
1817 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1818 if (err < 0)
1819 return err;
1820 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1821 snd_pcm_hw_rule_sample_bits, NULL,
1822 SNDRV_PCM_HW_PARAM_FORMAT,
1823 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1824 if (err < 0)
1825 return err;
1826 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1827 snd_pcm_hw_rule_div, NULL,
1828 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1829 if (err < 0)
1830 return err;
1831 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1832 snd_pcm_hw_rule_mul, NULL,
1833 SNDRV_PCM_HW_PARAM_SAMPLE_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_mulkdiv, (void*) 8,
1838 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -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_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1844 if (err < 0)
1845 return err;
1846 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1847 snd_pcm_hw_rule_div, NULL,
1848 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1849 if (err < 0)
1850 return err;
1851 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1852 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1853 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -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_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1859 if (err < 0)
1860 return err;
1861 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
1862 snd_pcm_hw_rule_div, NULL,
1863 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1864 if (err < 0)
1865 return err;
1866 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1867 snd_pcm_hw_rule_div, NULL,
1868 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -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_mulkdiv, (void*) 8,
1873 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -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_muldivk, (void*) 1000000,
1878 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1879 if (err < 0)
1880 return err;
1881 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1882 snd_pcm_hw_rule_mul, NULL,
1883 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -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_mulkdiv, (void*) 8,
1888 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -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_muldivk, (void*) 1000000,
1893 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1894 if (err < 0)
1895 return err;
1896 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1897 snd_pcm_hw_rule_muldivk, (void*) 8,
1898 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1899 if (err < 0)
1900 return err;
1901 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1902 snd_pcm_hw_rule_muldivk, (void*) 8,
1903 SNDRV_PCM_HW_PARAM_BUFFER_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_PERIOD_TIME,
1907 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1908 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1909 if (err < 0)
1910 return err;
1911 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
1912 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1913 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1914 if (err < 0)
1915 return err;
1916 return 0;
1917 }
1918
1919 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1920 {
1921 struct snd_pcm_runtime *runtime = substream->runtime;
1922 struct snd_pcm_hardware *hw = &runtime->hw;
1923 int err;
1924 unsigned int mask = 0;
1925
1926 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1927 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1928 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1929 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1930 if (hw->info & SNDRV_PCM_INFO_MMAP) {
1931 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1932 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1933 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1934 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1935 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1936 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1937 }
1938 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
1939 snd_assert(err >= 0, return -EINVAL);
1940
1941 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
1942 snd_assert(err >= 0, return -EINVAL);
1943
1944 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
1945 snd_assert(err >= 0, return -EINVAL);
1946
1947 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1948 hw->channels_min, hw->channels_max);
1949 snd_assert(err >= 0, return -EINVAL);
1950
1951 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1952 hw->rate_min, hw->rate_max);
1953 snd_assert(err >= 0, return -EINVAL);
1954
1955 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1956 hw->period_bytes_min, hw->period_bytes_max);
1957 snd_assert(err >= 0, return -EINVAL);
1958
1959 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1960 hw->periods_min, hw->periods_max);
1961 snd_assert(err >= 0, return -EINVAL);
1962
1963 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1964 hw->period_bytes_min, hw->buffer_bytes_max);
1965 snd_assert(err >= 0, return -EINVAL);
1966
1967 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1968 snd_pcm_hw_rule_buffer_bytes_max, substream,
1969 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1970 if (err < 0)
1971 return err;
1972
1973 /* FIXME: remove */
1974 if (runtime->dma_bytes) {
1975 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
1976 snd_assert(err >= 0, return -EINVAL);
1977 }
1978
1979 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
1980 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1981 snd_pcm_hw_rule_rate, hw,
1982 SNDRV_PCM_HW_PARAM_RATE, -1);
1983 if (err < 0)
1984 return err;
1985 }
1986
1987 /* FIXME: this belong to lowlevel */
1988 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_TICK_TIME,
1989 1000000 / HZ, 1000000 / HZ);
1990 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
1991
1992 return 0;
1993 }
1994
1995 static void pcm_release_private(struct snd_pcm_substream *substream)
1996 {
1997 snd_pcm_unlink(substream);
1998 }
1999
2000 void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2001 {
2002 substream->ref_count--;
2003 if (substream->ref_count > 0)
2004 return;
2005
2006 snd_pcm_drop(substream);
2007 if (substream->hw_opened) {
2008 if (substream->ops->hw_free != NULL)
2009 substream->ops->hw_free(substream);
2010 substream->ops->close(substream);
2011 substream->hw_opened = 0;
2012 }
2013 if (substream->pcm_release) {
2014 substream->pcm_release(substream);
2015 substream->pcm_release = NULL;
2016 }
2017 snd_pcm_detach_substream(substream);
2018 }
2019
2020 EXPORT_SYMBOL(snd_pcm_release_substream);
2021
2022 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2023 struct file *file,
2024 struct snd_pcm_substream **rsubstream)
2025 {
2026 struct snd_pcm_substream *substream;
2027 int err;
2028
2029 err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2030 if (err < 0)
2031 return err;
2032 if (substream->ref_count > 1) {
2033 *rsubstream = substream;
2034 return 0;
2035 }
2036
2037 err = snd_pcm_hw_constraints_init(substream);
2038 if (err < 0) {
2039 snd_printd("snd_pcm_hw_constraints_init failed\n");
2040 goto error;
2041 }
2042
2043 if ((err = substream->ops->open(substream)) < 0)
2044 goto error;
2045
2046 substream->hw_opened = 1;
2047
2048 err = snd_pcm_hw_constraints_complete(substream);
2049 if (err < 0) {
2050 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2051 goto error;
2052 }
2053
2054 *rsubstream = substream;
2055 return 0;
2056
2057 error:
2058 snd_pcm_release_substream(substream);
2059 return err;
2060 }
2061
2062 EXPORT_SYMBOL(snd_pcm_open_substream);
2063
2064 static int snd_pcm_open_file(struct file *file,
2065 struct snd_pcm *pcm,
2066 int stream,
2067 struct snd_pcm_file **rpcm_file)
2068 {
2069 struct snd_pcm_file *pcm_file;
2070 struct snd_pcm_substream *substream;
2071 struct snd_pcm_str *str;
2072 int err;
2073
2074 snd_assert(rpcm_file != NULL, return -EINVAL);
2075 *rpcm_file = NULL;
2076
2077 err = snd_pcm_open_substream(pcm, stream, file, &substream);
2078 if (err < 0)
2079 return err;
2080
2081 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2082 if (pcm_file == NULL) {
2083 snd_pcm_release_substream(substream);
2084 return -ENOMEM;
2085 }
2086 pcm_file->substream = substream;
2087 if (substream->ref_count == 1) {
2088 str = substream->pstr;
2089 substream->file = pcm_file;
2090 substream->pcm_release = pcm_release_private;
2091 }
2092 file->private_data = pcm_file;
2093 *rpcm_file = pcm_file;
2094 return 0;
2095 }
2096
2097 static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2098 {
2099 struct snd_pcm *pcm;
2100
2101 pcm = snd_lookup_minor_data(iminor(inode),
2102 SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2103 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2104 }
2105
2106 static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2107 {
2108 struct snd_pcm *pcm;
2109
2110 pcm = snd_lookup_minor_data(iminor(inode),
2111 SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2112 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2113 }
2114
2115 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2116 {
2117 int err;
2118 struct snd_pcm_file *pcm_file;
2119 wait_queue_t wait;
2120
2121 if (pcm == NULL) {
2122 err = -ENODEV;
2123 goto __error1;
2124 }
2125 err = snd_card_file_add(pcm->card, file);
2126 if (err < 0)
2127 goto __error1;
2128 if (!try_module_get(pcm->card->module)) {
2129 err = -EFAULT;
2130 goto __error2;
2131 }
2132 init_waitqueue_entry(&wait, current);
2133 add_wait_queue(&pcm->open_wait, &wait);
2134 mutex_lock(&pcm->open_mutex);
2135 while (1) {
2136 err = snd_pcm_open_file(file, pcm, stream, &pcm_file);
2137 if (err >= 0)
2138 break;
2139 if (err == -EAGAIN) {
2140 if (file->f_flags & O_NONBLOCK) {
2141 err = -EBUSY;
2142 break;
2143 }
2144 } else
2145 break;
2146 set_current_state(TASK_INTERRUPTIBLE);
2147 mutex_unlock(&pcm->open_mutex);
2148 schedule();
2149 mutex_lock(&pcm->open_mutex);
2150 if (signal_pending(current)) {
2151 err = -ERESTARTSYS;
2152 break;
2153 }
2154 }
2155 remove_wait_queue(&pcm->open_wait, &wait);
2156 mutex_unlock(&pcm->open_mutex);
2157 if (err < 0)
2158 goto __error;
2159 return err;
2160
2161 __error:
2162 module_put(pcm->card->module);
2163 __error2:
2164 snd_card_file_remove(pcm->card, file);
2165 __error1:
2166 return err;
2167 }
2168
2169 static int snd_pcm_release(struct inode *inode, struct file *file)
2170 {
2171 struct snd_pcm *pcm;
2172 struct snd_pcm_substream *substream;
2173 struct snd_pcm_file *pcm_file;
2174
2175 pcm_file = file->private_data;
2176 substream = pcm_file->substream;
2177 snd_assert(substream != NULL, return -ENXIO);
2178 pcm = substream->pcm;
2179 fasync_helper(-1, file, 0, &substream->runtime->fasync);
2180 mutex_lock(&pcm->open_mutex);
2181 snd_pcm_release_substream(substream);
2182 kfree(pcm_file);
2183 mutex_unlock(&pcm->open_mutex);
2184 wake_up(&pcm->open_wait);
2185 module_put(pcm->card->module);
2186 snd_card_file_remove(pcm->card, file);
2187 return 0;
2188 }
2189
2190 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2191 snd_pcm_uframes_t frames)
2192 {
2193 struct snd_pcm_runtime *runtime = substream->runtime;
2194 snd_pcm_sframes_t appl_ptr;
2195 snd_pcm_sframes_t ret;
2196 snd_pcm_sframes_t hw_avail;
2197
2198 if (frames == 0)
2199 return 0;
2200
2201 snd_pcm_stream_lock_irq(substream);
2202 switch (runtime->status->state) {
2203 case SNDRV_PCM_STATE_PREPARED:
2204 break;
2205 case SNDRV_PCM_STATE_DRAINING:
2206 case SNDRV_PCM_STATE_RUNNING:
2207 if (snd_pcm_update_hw_ptr(substream) >= 0)
2208 break;
2209 /* Fall through */
2210 case SNDRV_PCM_STATE_XRUN:
2211 ret = -EPIPE;
2212 goto __end;
2213 default:
2214 ret = -EBADFD;
2215 goto __end;
2216 }
2217
2218 hw_avail = snd_pcm_playback_hw_avail(runtime);
2219 if (hw_avail <= 0) {
2220 ret = 0;
2221 goto __end;
2222 }
2223 if (frames > (snd_pcm_uframes_t)hw_avail)
2224 frames = hw_avail;
2225 else
2226 frames -= frames % runtime->xfer_align;
2227 appl_ptr = runtime->control->appl_ptr - frames;
2228 if (appl_ptr < 0)
2229 appl_ptr += runtime->boundary;
2230 runtime->control->appl_ptr = appl_ptr;
2231 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2232 runtime->sleep_min)
2233 snd_pcm_tick_prepare(substream);
2234 ret = frames;
2235 __end:
2236 snd_pcm_stream_unlock_irq(substream);
2237 return ret;
2238 }
2239
2240 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2241 snd_pcm_uframes_t frames)
2242 {
2243 struct snd_pcm_runtime *runtime = substream->runtime;
2244 snd_pcm_sframes_t appl_ptr;
2245 snd_pcm_sframes_t ret;
2246 snd_pcm_sframes_t hw_avail;
2247
2248 if (frames == 0)
2249 return 0;
2250
2251 snd_pcm_stream_lock_irq(substream);
2252 switch (runtime->status->state) {
2253 case SNDRV_PCM_STATE_PREPARED:
2254 case SNDRV_PCM_STATE_DRAINING:
2255 break;
2256 case SNDRV_PCM_STATE_RUNNING:
2257 if (snd_pcm_update_hw_ptr(substream) >= 0)
2258 break;
2259 /* Fall through */
2260 case SNDRV_PCM_STATE_XRUN:
2261 ret = -EPIPE;
2262 goto __end;
2263 default:
2264 ret = -EBADFD;
2265 goto __end;
2266 }
2267
2268 hw_avail = snd_pcm_capture_hw_avail(runtime);
2269 if (hw_avail <= 0) {
2270 ret = 0;
2271 goto __end;
2272 }
2273 if (frames > (snd_pcm_uframes_t)hw_avail)
2274 frames = hw_avail;
2275 else
2276 frames -= frames % runtime->xfer_align;
2277 appl_ptr = runtime->control->appl_ptr - frames;
2278 if (appl_ptr < 0)
2279 appl_ptr += runtime->boundary;
2280 runtime->control->appl_ptr = appl_ptr;
2281 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2282 runtime->sleep_min)
2283 snd_pcm_tick_prepare(substream);
2284 ret = frames;
2285 __end:
2286 snd_pcm_stream_unlock_irq(substream);
2287 return ret;
2288 }
2289
2290 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2291 snd_pcm_uframes_t frames)
2292 {
2293 struct snd_pcm_runtime *runtime = substream->runtime;
2294 snd_pcm_sframes_t appl_ptr;
2295 snd_pcm_sframes_t ret;
2296 snd_pcm_sframes_t avail;
2297
2298 if (frames == 0)
2299 return 0;
2300
2301 snd_pcm_stream_lock_irq(substream);
2302 switch (runtime->status->state) {
2303 case SNDRV_PCM_STATE_PREPARED:
2304 case SNDRV_PCM_STATE_PAUSED:
2305 break;
2306 case SNDRV_PCM_STATE_DRAINING:
2307 case SNDRV_PCM_STATE_RUNNING:
2308 if (snd_pcm_update_hw_ptr(substream) >= 0)
2309 break;
2310 /* Fall through */
2311 case SNDRV_PCM_STATE_XRUN:
2312 ret = -EPIPE;
2313 goto __end;
2314 default:
2315 ret = -EBADFD;
2316 goto __end;
2317 }
2318
2319 avail = snd_pcm_playback_avail(runtime);
2320 if (avail <= 0) {
2321 ret = 0;
2322 goto __end;
2323 }
2324 if (frames > (snd_pcm_uframes_t)avail)
2325 frames = avail;
2326 else
2327 frames -= frames % runtime->xfer_align;
2328 appl_ptr = runtime->control->appl_ptr + frames;
2329 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2330 appl_ptr -= runtime->boundary;
2331 runtime->control->appl_ptr = appl_ptr;
2332 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2333 runtime->sleep_min)
2334 snd_pcm_tick_prepare(substream);
2335 ret = frames;
2336 __end:
2337 snd_pcm_stream_unlock_irq(substream);
2338 return ret;
2339 }
2340
2341 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2342 snd_pcm_uframes_t frames)
2343 {
2344 struct snd_pcm_runtime *runtime = substream->runtime;
2345 snd_pcm_sframes_t appl_ptr;
2346 snd_pcm_sframes_t ret;
2347 snd_pcm_sframes_t avail;
2348
2349 if (frames == 0)
2350 return 0;
2351
2352 snd_pcm_stream_lock_irq(substream);
2353 switch (runtime->status->state) {
2354 case SNDRV_PCM_STATE_PREPARED:
2355 case SNDRV_PCM_STATE_DRAINING:
2356 case SNDRV_PCM_STATE_PAUSED:
2357 break;
2358 case SNDRV_PCM_STATE_RUNNING:
2359 if (snd_pcm_update_hw_ptr(substream) >= 0)
2360 break;
2361 /* Fall through */
2362 case SNDRV_PCM_STATE_XRUN:
2363 ret = -EPIPE;
2364 goto __end;
2365 default:
2366 ret = -EBADFD;
2367 goto __end;
2368 }
2369
2370 avail = snd_pcm_capture_avail(runtime);
2371 if (avail <= 0) {
2372 ret = 0;
2373 goto __end;
2374 }
2375 if (frames > (snd_pcm_uframes_t)avail)
2376 frames = avail;
2377 else
2378 frames -= frames % runtime->xfer_align;
2379 appl_ptr = runtime->control->appl_ptr + frames;
2380 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2381 appl_ptr -= runtime->boundary;
2382 runtime->control->appl_ptr = appl_ptr;
2383 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2384 runtime->sleep_min)
2385 snd_pcm_tick_prepare(substream);
2386 ret = frames;
2387 __end:
2388 snd_pcm_stream_unlock_irq(substream);
2389 return ret;
2390 }
2391
2392 static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2393 {
2394 struct snd_pcm_runtime *runtime = substream->runtime;
2395 int err;
2396
2397 snd_pcm_stream_lock_irq(substream);
2398 switch (runtime->status->state) {
2399 case SNDRV_PCM_STATE_DRAINING:
2400 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2401 goto __badfd;
2402 case SNDRV_PCM_STATE_RUNNING:
2403 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2404 break;
2405 /* Fall through */
2406 case SNDRV_PCM_STATE_PREPARED:
2407 case SNDRV_PCM_STATE_SUSPENDED:
2408 err = 0;
2409 break;
2410 case SNDRV_PCM_STATE_XRUN:
2411 err = -EPIPE;
2412 break;
2413 default:
2414 __badfd:
2415 err = -EBADFD;
2416 break;
2417 }
2418 snd_pcm_stream_unlock_irq(substream);
2419 return err;
2420 }
2421
2422 static int snd_pcm_delay(struct snd_pcm_substream *substream,
2423 snd_pcm_sframes_t __user *res)
2424 {
2425 struct snd_pcm_runtime *runtime = substream->runtime;
2426 int err;
2427 snd_pcm_sframes_t n = 0;
2428
2429 snd_pcm_stream_lock_irq(substream);
2430 switch (runtime->status->state) {
2431 case SNDRV_PCM_STATE_DRAINING:
2432 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2433 goto __badfd;
2434 case SNDRV_PCM_STATE_RUNNING:
2435 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2436 break;
2437 /* Fall through */
2438 case SNDRV_PCM_STATE_PREPARED:
2439 case SNDRV_PCM_STATE_SUSPENDED:
2440 err = 0;
2441 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2442 n = snd_pcm_playback_hw_avail(runtime);
2443 else
2444 n = snd_pcm_capture_avail(runtime);
2445 break;
2446 case SNDRV_PCM_STATE_XRUN:
2447 err = -EPIPE;
2448 break;
2449 default:
2450 __badfd:
2451 err = -EBADFD;
2452 break;
2453 }
2454 snd_pcm_stream_unlock_irq(substream);
2455 if (!err)
2456 if (put_user(n, res))
2457 err = -EFAULT;
2458 return err;
2459 }
2460
2461 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2462 struct snd_pcm_sync_ptr __user *_sync_ptr)
2463 {
2464 struct snd_pcm_runtime *runtime = substream->runtime;
2465 struct snd_pcm_sync_ptr sync_ptr;
2466 volatile struct snd_pcm_mmap_status *status;
2467 volatile struct snd_pcm_mmap_control *control;
2468 int err;
2469
2470 memset(&sync_ptr, 0, sizeof(sync_ptr));
2471 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2472 return -EFAULT;
2473 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2474 return -EFAULT;
2475 status = runtime->status;
2476 control = runtime->control;
2477 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2478 err = snd_pcm_hwsync(substream);
2479 if (err < 0)
2480 return err;
2481 }
2482 snd_pcm_stream_lock_irq(substream);
2483 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2484 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2485 else
2486 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2487 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2488 control->avail_min = sync_ptr.c.control.avail_min;
2489 else
2490 sync_ptr.c.control.avail_min = control->avail_min;
2491 sync_ptr.s.status.state = status->state;
2492 sync_ptr.s.status.hw_ptr = status->hw_ptr;
2493 sync_ptr.s.status.tstamp = status->tstamp;
2494 sync_ptr.s.status.suspended_state = status->suspended_state;
2495 snd_pcm_stream_unlock_irq(substream);
2496 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2497 return -EFAULT;
2498 return 0;
2499 }
2500
2501 static int snd_pcm_common_ioctl1(struct file *file,
2502 struct snd_pcm_substream *substream,
2503 unsigned int cmd, void __user *arg)
2504 {
2505 snd_assert(substream != NULL, return -ENXIO);
2506
2507 switch (cmd) {
2508 case SNDRV_PCM_IOCTL_PVERSION:
2509 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2510 case SNDRV_PCM_IOCTL_INFO:
2511 return snd_pcm_info_user(substream, arg);
2512 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
2513 return 0;
2514 case SNDRV_PCM_IOCTL_HW_REFINE:
2515 return snd_pcm_hw_refine_user(substream, arg);
2516 case SNDRV_PCM_IOCTL_HW_PARAMS:
2517 return snd_pcm_hw_params_user(substream, arg);
2518 case SNDRV_PCM_IOCTL_HW_FREE:
2519 return snd_pcm_hw_free(substream);
2520 case SNDRV_PCM_IOCTL_SW_PARAMS:
2521 return snd_pcm_sw_params_user(substream, arg);
2522 case SNDRV_PCM_IOCTL_STATUS:
2523 return snd_pcm_status_user(substream, arg);
2524 case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2525 return snd_pcm_channel_info_user(substream, arg);
2526 case SNDRV_PCM_IOCTL_PREPARE:
2527 return snd_pcm_prepare(substream, file);
2528 case SNDRV_PCM_IOCTL_RESET:
2529 return snd_pcm_reset(substream);
2530 case SNDRV_PCM_IOCTL_START:
2531 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2532 case SNDRV_PCM_IOCTL_LINK:
2533 return snd_pcm_link(substream, (int)(unsigned long) arg);
2534 case SNDRV_PCM_IOCTL_UNLINK:
2535 return snd_pcm_unlink(substream);
2536 case SNDRV_PCM_IOCTL_RESUME:
2537 return snd_pcm_resume(substream);
2538 case SNDRV_PCM_IOCTL_XRUN:
2539 return snd_pcm_xrun(substream);
2540 case SNDRV_PCM_IOCTL_HWSYNC:
2541 return snd_pcm_hwsync(substream);
2542 case SNDRV_PCM_IOCTL_DELAY:
2543 return snd_pcm_delay(substream, arg);
2544 case SNDRV_PCM_IOCTL_SYNC_PTR:
2545 return snd_pcm_sync_ptr(substream, arg);
2546 #ifdef CONFIG_SND_SUPPORT_OLD_API
2547 case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2548 return snd_pcm_hw_refine_old_user(substream, arg);
2549 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2550 return snd_pcm_hw_params_old_user(substream, arg);
2551 #endif
2552 case SNDRV_PCM_IOCTL_DRAIN:
2553 return snd_pcm_drain(substream);
2554 case SNDRV_PCM_IOCTL_DROP:
2555 return snd_pcm_drop(substream);
2556 case SNDRV_PCM_IOCTL_PAUSE:
2557 {
2558 int res;
2559 snd_pcm_stream_lock_irq(substream);
2560 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2561 snd_pcm_stream_unlock_irq(substream);
2562 return res;
2563 }
2564 }
2565 snd_printd("unknown ioctl = 0x%x\n", cmd);
2566 return -ENOTTY;
2567 }
2568
2569 static int snd_pcm_playback_ioctl1(struct file *file,
2570 struct snd_pcm_substream *substream,
2571 unsigned int cmd, void __user *arg)
2572 {
2573 snd_assert(substream != NULL, return -ENXIO);
2574 snd_assert(substream->stream == SNDRV_PCM_STREAM_PLAYBACK, return -EINVAL);
2575 switch (cmd) {
2576 case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2577 {
2578 struct snd_xferi xferi;
2579 struct snd_xferi __user *_xferi = arg;
2580 struct snd_pcm_runtime *runtime = substream->runtime;
2581 snd_pcm_sframes_t result;
2582 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2583 return -EBADFD;
2584 if (put_user(0, &_xferi->result))
2585 return -EFAULT;
2586 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2587 return -EFAULT;
2588 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2589 __put_user(result, &_xferi->result);
2590 return result < 0 ? result : 0;
2591 }
2592 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2593 {
2594 struct snd_xfern xfern;
2595 struct snd_xfern __user *_xfern = arg;
2596 struct snd_pcm_runtime *runtime = substream->runtime;
2597 void __user **bufs;
2598 snd_pcm_sframes_t result;
2599 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2600 return -EBADFD;
2601 if (runtime->channels > 128)
2602 return -EINVAL;
2603 if (put_user(0, &_xfern->result))
2604 return -EFAULT;
2605 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2606 return -EFAULT;
2607 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL);
2608 if (bufs == NULL)
2609 return -ENOMEM;
2610 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) {
2611 kfree(bufs);
2612 return -EFAULT;
2613 }
2614 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2615 kfree(bufs);
2616 __put_user(result, &_xfern->result);
2617 return result < 0 ? result : 0;
2618 }
2619 case SNDRV_PCM_IOCTL_REWIND:
2620 {
2621 snd_pcm_uframes_t frames;
2622 snd_pcm_uframes_t __user *_frames = arg;
2623 snd_pcm_sframes_t result;
2624 if (get_user(frames, _frames))
2625 return -EFAULT;
2626 if (put_user(0, _frames))
2627 return -EFAULT;
2628 result = snd_pcm_playback_rewind(substream, frames);
2629 __put_user(result, _frames);
2630 return result < 0 ? result : 0;
2631 }
2632 case SNDRV_PCM_IOCTL_FORWARD:
2633 {
2634 snd_pcm_uframes_t frames;
2635 snd_pcm_uframes_t __user *_frames = arg;
2636 snd_pcm_sframes_t result;
2637 if (get_user(frames, _frames))
2638 return -EFAULT;
2639 if (put_user(0, _frames))
2640 return -EFAULT;
2641 result = snd_pcm_playback_forward(substream, frames);
2642 __put_user(result, _frames);
2643 return result < 0 ? result : 0;
2644 }
2645 }
2646 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2647 }
2648
2649 static int snd_pcm_capture_ioctl1(struct file *file,
2650 struct snd_pcm_substream *substream,
2651 unsigned int cmd, void __user *arg)
2652 {
2653 snd_assert(substream != NULL, return -ENXIO);
2654 snd_assert(substream->stream == SNDRV_PCM_STREAM_CAPTURE, return -EINVAL);
2655 switch (cmd) {
2656 case SNDRV_PCM_IOCTL_READI_FRAMES:
2657 {
2658 struct snd_xferi xferi;
2659 struct snd_xferi __user *_xferi = arg;
2660 struct snd_pcm_runtime *runtime = substream->runtime;
2661 snd_pcm_sframes_t result;
2662 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2663 return -EBADFD;
2664 if (put_user(0, &_xferi->result))
2665 return -EFAULT;
2666 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2667 return -EFAULT;
2668 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2669 __put_user(result, &_xferi->result);
2670 return result < 0 ? result : 0;
2671 }
2672 case SNDRV_PCM_IOCTL_READN_FRAMES:
2673 {
2674 struct snd_xfern xfern;
2675 struct snd_xfern __user *_xfern = arg;
2676 struct snd_pcm_runtime *runtime = substream->runtime;
2677 void *bufs;
2678 snd_pcm_sframes_t result;
2679 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2680 return -EBADFD;
2681 if (runtime->channels > 128)
2682 return -EINVAL;
2683 if (put_user(0, &_xfern->result))
2684 return -EFAULT;
2685 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2686 return -EFAULT;
2687 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL);
2688 if (bufs == NULL)
2689 return -ENOMEM;
2690 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) {
2691 kfree(bufs);
2692 return -EFAULT;
2693 }
2694 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2695 kfree(bufs);
2696 __put_user(result, &_xfern->result);
2697 return result < 0 ? result : 0;
2698 }
2699 case SNDRV_PCM_IOCTL_REWIND:
2700 {
2701 snd_pcm_uframes_t frames;
2702 snd_pcm_uframes_t __user *_frames = arg;
2703 snd_pcm_sframes_t result;
2704 if (get_user(frames, _frames))
2705 return -EFAULT;
2706 if (put_user(0, _frames))
2707 return -EFAULT;
2708 result = snd_pcm_capture_rewind(substream, frames);
2709 __put_user(result, _frames);
2710 return result < 0 ? result : 0;
2711 }
2712 case SNDRV_PCM_IOCTL_FORWARD:
2713 {
2714 snd_pcm_uframes_t frames;
2715 snd_pcm_uframes_t __user *_frames = arg;
2716 snd_pcm_sframes_t result;
2717 if (get_user(frames, _frames))
2718 return -EFAULT;
2719 if (put_user(0, _frames))
2720 return -EFAULT;
2721 result = snd_pcm_capture_forward(substream, frames);
2722 __put_user(result, _frames);
2723 return result < 0 ? result : 0;
2724 }
2725 }
2726 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2727 }
2728
2729 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2730 unsigned long arg)
2731 {
2732 struct snd_pcm_file *pcm_file;
2733
2734 pcm_file = file->private_data;
2735
2736 if (((cmd >> 8) & 0xff) != 'A')
2737 return -ENOTTY;
2738
2739 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2740 (void __user *)arg);
2741 }
2742
2743 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2744 unsigned long arg)
2745 {
2746 struct snd_pcm_file *pcm_file;
2747
2748 pcm_file = file->private_data;
2749
2750 if (((cmd >> 8) & 0xff) != 'A')
2751 return -ENOTTY;
2752
2753 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2754 (void __user *)arg);
2755 }
2756
2757 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2758 unsigned int cmd, void *arg)
2759 {
2760 mm_segment_t fs;
2761 int result;
2762
2763 fs = snd_enter_user();
2764 switch (substream->stream) {
2765 case SNDRV_PCM_STREAM_PLAYBACK:
2766 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2767 (void __user *)arg);
2768 break;
2769 case SNDRV_PCM_STREAM_CAPTURE:
2770 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2771 (void __user *)arg);
2772 break;
2773 default:
2774 result = -EINVAL;
2775 break;
2776 }
2777 snd_leave_user(fs);
2778 return result;
2779 }
2780
2781 EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2782
2783 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2784 loff_t * offset)
2785 {
2786 struct snd_pcm_file *pcm_file;
2787 struct snd_pcm_substream *substream;
2788 struct snd_pcm_runtime *runtime;
2789 snd_pcm_sframes_t result;
2790
2791 pcm_file = file->private_data;
2792 substream = pcm_file->substream;
2793 snd_assert(substream != NULL, return -ENXIO);
2794 runtime = substream->runtime;
2795 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2796 return -EBADFD;
2797 if (!frame_aligned(runtime, count))
2798 return -EINVAL;
2799 count = bytes_to_frames(runtime, count);
2800 result = snd_pcm_lib_read(substream, buf, count);
2801 if (result > 0)
2802 result = frames_to_bytes(runtime, result);
2803 return result;
2804 }
2805
2806 static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2807 size_t count, loff_t * offset)
2808 {
2809 struct snd_pcm_file *pcm_file;
2810 struct snd_pcm_substream *substream;
2811 struct snd_pcm_runtime *runtime;
2812 snd_pcm_sframes_t result;
2813
2814 pcm_file = file->private_data;
2815 substream = pcm_file->substream;
2816 snd_assert(substream != NULL, result = -ENXIO; goto end);
2817 runtime = substream->runtime;
2818 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
2819 result = -EBADFD;
2820 goto end;
2821 }
2822 if (!frame_aligned(runtime, count)) {
2823 result = -EINVAL;
2824 goto end;
2825 }
2826 count = bytes_to_frames(runtime, count);
2827 result = snd_pcm_lib_write(substream, buf, count);
2828 if (result > 0)
2829 result = frames_to_bytes(runtime, result);
2830 end:
2831 return result;
2832 }
2833
2834 static ssize_t snd_pcm_readv(struct file *file, const struct iovec *_vector,
2835 unsigned long count, loff_t * offset)
2836
2837 {
2838 struct snd_pcm_file *pcm_file;
2839 struct snd_pcm_substream *substream;
2840 struct snd_pcm_runtime *runtime;
2841 snd_pcm_sframes_t result;
2842 unsigned long i;
2843 void __user **bufs;
2844 snd_pcm_uframes_t frames;
2845
2846 pcm_file = file->private_data;
2847 substream = pcm_file->substream;
2848 snd_assert(substream != NULL, return -ENXIO);
2849 runtime = substream->runtime;
2850 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2851 return -EBADFD;
2852 if (count > 1024 || count != runtime->channels)
2853 return -EINVAL;
2854 if (!frame_aligned(runtime, _vector->iov_len))
2855 return -EINVAL;
2856 frames = bytes_to_samples(runtime, _vector->iov_len);
2857 bufs = kmalloc(sizeof(void *) * count, GFP_KERNEL);
2858 if (bufs == NULL)
2859 return -ENOMEM;
2860 for (i = 0; i < count; ++i)
2861 bufs[i] = _vector[i].iov_base;
2862 result = snd_pcm_lib_readv(substream, bufs, frames);
2863 if (result > 0)
2864 result = frames_to_bytes(runtime, result);
2865 kfree(bufs);
2866 return result;
2867 }
2868
2869 static ssize_t snd_pcm_writev(struct file *file, const struct iovec *_vector,
2870 unsigned long count, loff_t * offset)
2871 {
2872 struct snd_pcm_file *pcm_file;
2873 struct snd_pcm_substream *substream;
2874 struct snd_pcm_runtime *runtime;
2875 snd_pcm_sframes_t result;
2876 unsigned long i;
2877 void __user **bufs;
2878 snd_pcm_uframes_t frames;
2879
2880 pcm_file = file->private_data;
2881 substream = pcm_file->substream;
2882 snd_assert(substream != NULL, result = -ENXIO; goto end);
2883 runtime = substream->runtime;
2884 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
2885 result = -EBADFD;
2886 goto end;
2887 }
2888 if (count > 128 || count != runtime->channels ||
2889 !frame_aligned(runtime, _vector->iov_len)) {
2890 result = -EINVAL;
2891 goto end;
2892 }
2893 frames = bytes_to_samples(runtime, _vector->iov_len);
2894 bufs = kmalloc(sizeof(void *) * count, GFP_KERNEL);
2895 if (bufs == NULL)
2896 return -ENOMEM;
2897 for (i = 0; i < count; ++i)
2898 bufs[i] = _vector[i].iov_base;
2899 result = snd_pcm_lib_writev(substream, bufs, frames);
2900 if (result > 0)
2901 result = frames_to_bytes(runtime, result);
2902 kfree(bufs);
2903 end:
2904 return result;
2905 }
2906
2907 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2908 {
2909 struct snd_pcm_file *pcm_file;
2910 struct snd_pcm_substream *substream;
2911 struct snd_pcm_runtime *runtime;
2912 unsigned int mask;
2913 snd_pcm_uframes_t avail;
2914
2915 pcm_file = file->private_data;
2916
2917 substream = pcm_file->substream;
2918 snd_assert(substream != NULL, return -ENXIO);
2919 runtime = substream->runtime;
2920
2921 poll_wait(file, &runtime->sleep, wait);
2922
2923 snd_pcm_stream_lock_irq(substream);
2924 avail = snd_pcm_playback_avail(runtime);
2925 switch (runtime->status->state) {
2926 case SNDRV_PCM_STATE_RUNNING:
2927 case SNDRV_PCM_STATE_PREPARED:
2928 case SNDRV_PCM_STATE_PAUSED:
2929 if (avail >= runtime->control->avail_min) {
2930 mask = POLLOUT | POLLWRNORM;
2931 break;
2932 }
2933 /* Fall through */
2934 case SNDRV_PCM_STATE_DRAINING:
2935 mask = 0;
2936 break;
2937 default:
2938 mask = POLLOUT | POLLWRNORM | POLLERR;
2939 break;
2940 }
2941 snd_pcm_stream_unlock_irq(substream);
2942 return mask;
2943 }
2944
2945 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2946 {
2947 struct snd_pcm_file *pcm_file;
2948 struct snd_pcm_substream *substream;
2949 struct snd_pcm_runtime *runtime;
2950 unsigned int mask;
2951 snd_pcm_uframes_t avail;
2952
2953 pcm_file = file->private_data;
2954
2955 substream = pcm_file->substream;
2956 snd_assert(substream != NULL, return -ENXIO);
2957 runtime = substream->runtime;
2958
2959 poll_wait(file, &runtime->sleep, wait);
2960
2961 snd_pcm_stream_lock_irq(substream);
2962 avail = snd_pcm_capture_avail(runtime);
2963 switch (runtime->status->state) {
2964 case SNDRV_PCM_STATE_RUNNING:
2965 case SNDRV_PCM_STATE_PREPARED:
2966 case SNDRV_PCM_STATE_PAUSED:
2967 if (avail >= runtime->control->avail_min) {
2968 mask = POLLIN | POLLRDNORM;
2969 break;
2970 }
2971 mask = 0;
2972 break;
2973 case SNDRV_PCM_STATE_DRAINING:
2974 if (avail > 0) {
2975 mask = POLLIN | POLLRDNORM;
2976 break;
2977 }
2978 /* Fall through */
2979 default:
2980 mask = POLLIN | POLLRDNORM | POLLERR;
2981 break;
2982 }
2983 snd_pcm_stream_unlock_irq(substream);
2984 return mask;
2985 }
2986
2987 /*
2988 * mmap support
2989 */
2990
2991 /*
2992 * Only on coherent architectures, we can mmap the status and the control records
2993 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
2994 */
2995 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
2996 /*
2997 * mmap status record
2998 */
2999 static struct page * snd_pcm_mmap_status_nopage(struct vm_area_struct *area,
3000 unsigned long address, int *type)
3001 {
3002 struct snd_pcm_substream *substream = area->vm_private_data;
3003 struct snd_pcm_runtime *runtime;
3004 struct page * page;
3005
3006 if (substream == NULL)
3007 return NOPAGE_OOM;
3008 runtime = substream->runtime;
3009 page = virt_to_page(runtime->status);
3010 get_page(page);
3011 if (type)
3012 *type = VM_FAULT_MINOR;
3013 return page;
3014 }
3015
3016 static struct vm_operations_struct snd_pcm_vm_ops_status =
3017 {
3018 .nopage = snd_pcm_mmap_status_nopage,
3019 };
3020
3021 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3022 struct vm_area_struct *area)
3023 {
3024 struct snd_pcm_runtime *runtime;
3025 long size;
3026 if (!(area->vm_flags & VM_READ))
3027 return -EINVAL;
3028 runtime = substream->runtime;
3029 snd_assert(runtime != NULL, return -EAGAIN);
3030 size = area->vm_end - area->vm_start;
3031 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3032 return -EINVAL;
3033 area->vm_ops = &snd_pcm_vm_ops_status;
3034 area->vm_private_data = substream;
3035 area->vm_flags |= VM_RESERVED;
3036 return 0;
3037 }
3038
3039 /*
3040 * mmap control record
3041 */
3042 static struct page * snd_pcm_mmap_control_nopage(struct vm_area_struct *area,
3043 unsigned long address, int *type)
3044 {
3045 struct snd_pcm_substream *substream = area->vm_private_data;
3046 struct snd_pcm_runtime *runtime;
3047 struct page * page;
3048
3049 if (substream == NULL)
3050 return NOPAGE_OOM;
3051 runtime = substream->runtime;
3052 page = virt_to_page(runtime->control);
3053 get_page(page);
3054 if (type)
3055 *type = VM_FAULT_MINOR;
3056 return page;
3057 }
3058
3059 static struct vm_operations_struct snd_pcm_vm_ops_control =
3060 {
3061 .nopage = snd_pcm_mmap_control_nopage,
3062 };
3063
3064 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3065 struct vm_area_struct *area)
3066 {
3067 struct snd_pcm_runtime *runtime;
3068 long size;
3069 if (!(area->vm_flags & VM_READ))
3070 return -EINVAL;
3071 runtime = substream->runtime;
3072 snd_assert(runtime != NULL, return -EAGAIN);
3073 size = area->vm_end - area->vm_start;
3074 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3075 return -EINVAL;
3076 area->vm_ops = &snd_pcm_vm_ops_control;
3077 area->vm_private_data = substream;
3078 area->vm_flags |= VM_RESERVED;
3079 return 0;
3080 }
3081 #else /* ! coherent mmap */
3082 /*
3083 * don't support mmap for status and control records.
3084 */
3085 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3086 struct vm_area_struct *area)
3087 {
3088 return -ENXIO;
3089 }
3090 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3091 struct vm_area_struct *area)
3092 {
3093 return -ENXIO;
3094 }
3095 #endif /* coherent mmap */
3096
3097 /*
3098 * nopage callback for mmapping a RAM page
3099 */
3100 static struct page *snd_pcm_mmap_data_nopage(struct vm_area_struct *area,
3101 unsigned long address, int *type)
3102 {
3103 struct snd_pcm_substream *substream = area->vm_private_data;
3104 struct snd_pcm_runtime *runtime;
3105 unsigned long offset;
3106 struct page * page;
3107 void *vaddr;
3108 size_t dma_bytes;
3109
3110 if (substream == NULL)
3111 return NOPAGE_OOM;
3112 runtime = substream->runtime;
3113 offset = area->vm_pgoff << PAGE_SHIFT;
3114 offset += address - area->vm_start;
3115 snd_assert((offset % PAGE_SIZE) == 0, return NOPAGE_OOM);
3116 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3117 if (offset > dma_bytes - PAGE_SIZE)
3118 return NOPAGE_SIGBUS;
3119 if (substream->ops->page) {
3120 page = substream->ops->page(substream, offset);
3121 if (! page)
3122 return NOPAGE_OOM;
3123 } else {
3124 vaddr = runtime->dma_area + offset;
3125 page = virt_to_page(vaddr);
3126 }
3127 get_page(page);
3128 if (type)
3129 *type = VM_FAULT_MINOR;
3130 return page;
3131 }
3132
3133 static struct vm_operations_struct snd_pcm_vm_ops_data =
3134 {
3135 .open = snd_pcm_mmap_data_open,
3136 .close = snd_pcm_mmap_data_close,
3137 .nopage = snd_pcm_mmap_data_nopage,
3138 };
3139
3140 /*
3141 * mmap the DMA buffer on RAM
3142 */
3143 static int snd_pcm_default_mmap(struct snd_pcm_substream *substream,
3144 struct vm_area_struct *area)
3145 {
3146 area->vm_ops = &snd_pcm_vm_ops_data;
3147 area->vm_private_data = substream;
3148 area->vm_flags |= VM_RESERVED;
3149 atomic_inc(&substream->mmap_count);
3150 return 0;
3151 }
3152
3153 /*
3154 * mmap the DMA buffer on I/O memory area
3155 */
3156 #if SNDRV_PCM_INFO_MMAP_IOMEM
3157 static struct vm_operations_struct snd_pcm_vm_ops_data_mmio =
3158 {
3159 .open = snd_pcm_mmap_data_open,
3160 .close = snd_pcm_mmap_data_close,
3161 };
3162
3163 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3164 struct vm_area_struct *area)
3165 {
3166 long size;
3167 unsigned long offset;
3168
3169 #ifdef pgprot_noncached
3170 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3171 #endif
3172 area->vm_ops = &snd_pcm_vm_ops_data_mmio;
3173 area->vm_private_data = substream;
3174 area->vm_flags |= VM_IO;
3175 size = area->vm_end - area->vm_start;
3176 offset = area->vm_pgoff << PAGE_SHIFT;
3177 if (io_remap_pfn_range(area, area->vm_start,
3178 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3179 size, area->vm_page_prot))
3180 return -EAGAIN;
3181 atomic_inc(&substream->mmap_count);
3182 return 0;
3183 }
3184
3185 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3186 #endif /* SNDRV_PCM_INFO_MMAP */
3187
3188 /*
3189 * mmap DMA buffer
3190 */
3191 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3192 struct vm_area_struct *area)
3193 {
3194 struct snd_pcm_runtime *runtime;
3195 long size;
3196 unsigned long offset;
3197 size_t dma_bytes;
3198
3199 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3200 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3201 return -EINVAL;
3202 } else {
3203 if (!(area->vm_flags & VM_READ))
3204 return -EINVAL;
3205 }
3206 runtime = substream->runtime;
3207 snd_assert(runtime != NULL, return -EAGAIN);
3208 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3209 return -EBADFD;
3210 if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3211 return -ENXIO;
3212 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3213 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3214 return -EINVAL;
3215 size = area->vm_end - area->vm_start;
3216 offset = area->vm_pgoff << PAGE_SHIFT;
3217 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3218 if ((size_t)size > dma_bytes)
3219 return -EINVAL;
3220 if (offset > dma_bytes - size)
3221 return -EINVAL;
3222
3223 if (substream->ops->mmap)
3224 return substream->ops->mmap(substream, area);
3225 else
3226 return snd_pcm_default_mmap(substream, area);
3227 }
3228
3229 EXPORT_SYMBOL(snd_pcm_mmap_data);
3230
3231 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3232 {
3233 struct snd_pcm_file * pcm_file;
3234 struct snd_pcm_substream *substream;
3235 unsigned long offset;
3236
3237 pcm_file = file->private_data;
3238 substream = pcm_file->substream;
3239 snd_assert(substream != NULL, return -ENXIO);
3240
3241 offset = area->vm_pgoff << PAGE_SHIFT;
3242 switch (offset) {
3243 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3244 if (pcm_file->no_compat_mmap)
3245 return -ENXIO;
3246 return snd_pcm_mmap_status(substream, file, area);
3247 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3248 if (pcm_file->no_compat_mmap)
3249 return -ENXIO;
3250 return snd_pcm_mmap_control(substream, file, area);
3251 default:
3252 return snd_pcm_mmap_data(substream, file, area);
3253 }
3254 return 0;
3255 }
3256
3257 static int snd_pcm_fasync(int fd, struct file * file, int on)
3258 {
3259 struct snd_pcm_file * pcm_file;
3260 struct snd_pcm_substream *substream;
3261 struct snd_pcm_runtime *runtime;
3262 int err;
3263
3264 pcm_file = file->private_data;
3265 substream = pcm_file->substream;
3266 snd_assert(substream != NULL, return -ENXIO);
3267 runtime = substream->runtime;
3268
3269 err = fasync_helper(fd, file, on, &runtime->fasync);
3270 if (err < 0)
3271 return err;
3272 return 0;
3273 }
3274
3275 /*
3276 * ioctl32 compat
3277 */
3278 #ifdef CONFIG_COMPAT
3279 #include "pcm_compat.c"
3280 #else
3281 #define snd_pcm_ioctl_compat NULL
3282 #endif
3283
3284 /*
3285 * To be removed helpers to keep binary compatibility
3286 */
3287
3288 #ifdef CONFIG_SND_SUPPORT_OLD_API
3289 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3290 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3291
3292 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3293 struct snd_pcm_hw_params_old *oparams)
3294 {
3295 unsigned int i;
3296
3297 memset(params, 0, sizeof(*params));
3298 params->flags = oparams->flags;
3299 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3300 params->masks[i].bits[0] = oparams->masks[i];
3301 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3302 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3303 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3304 params->info = oparams->info;
3305 params->msbits = oparams->msbits;
3306 params->rate_num = oparams->rate_num;
3307 params->rate_den = oparams->rate_den;
3308 params->fifo_size = oparams->fifo_size;
3309 }
3310
3311 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3312 struct snd_pcm_hw_params *params)
3313 {
3314 unsigned int i;
3315
3316 memset(oparams, 0, sizeof(*oparams));
3317 oparams->flags = params->flags;
3318 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3319 oparams->masks[i] = params->masks[i].bits[0];
3320 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3321 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3322 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3323 oparams->info = params->info;
3324 oparams->msbits = params->msbits;
3325 oparams->rate_num = params->rate_num;
3326 oparams->rate_den = params->rate_den;
3327 oparams->fifo_size = params->fifo_size;
3328 }
3329
3330 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3331 struct snd_pcm_hw_params_old __user * _oparams)
3332 {
3333 struct snd_pcm_hw_params *params;
3334 struct snd_pcm_hw_params_old *oparams = NULL;
3335 int err;
3336
3337 params = kmalloc(sizeof(*params), GFP_KERNEL);
3338 if (!params) {
3339 err = -ENOMEM;
3340 goto out;
3341 }
3342 oparams = kmalloc(sizeof(*oparams), GFP_KERNEL);
3343 if (!oparams) {
3344 err = -ENOMEM;
3345 goto out;
3346 }
3347
3348 if (copy_from_user(oparams, _oparams, sizeof(*oparams))) {
3349 err = -EFAULT;
3350 goto out;
3351 }
3352 snd_pcm_hw_convert_from_old_params(params, oparams);
3353 err = snd_pcm_hw_refine(substream, params);
3354 snd_pcm_hw_convert_to_old_params(oparams, params);
3355 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3356 if (!err)
3357 err = -EFAULT;
3358 }
3359 out:
3360 kfree(params);
3361 kfree(oparams);
3362 return err;
3363 }
3364
3365 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3366 struct snd_pcm_hw_params_old __user * _oparams)
3367 {
3368 struct snd_pcm_hw_params *params;
3369 struct snd_pcm_hw_params_old *oparams = NULL;
3370 int err;
3371
3372 params = kmalloc(sizeof(*params), GFP_KERNEL);
3373 if (!params) {
3374 err = -ENOMEM;
3375 goto out;
3376 }
3377 oparams = kmalloc(sizeof(*oparams), GFP_KERNEL);
3378 if (!oparams) {
3379 err = -ENOMEM;
3380 goto out;
3381 }
3382 if (copy_from_user(oparams, _oparams, sizeof(*oparams))) {
3383 err = -EFAULT;
3384 goto out;
3385 }
3386 snd_pcm_hw_convert_from_old_params(params, oparams);
3387 err = snd_pcm_hw_params(substream, params);
3388 snd_pcm_hw_convert_to_old_params(oparams, params);
3389 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3390 if (!err)
3391 err = -EFAULT;
3392 }
3393 out:
3394 kfree(params);
3395 kfree(oparams);
3396 return err;
3397 }
3398 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3399
3400 /*
3401 * Register section
3402 */
3403
3404 struct file_operations snd_pcm_f_ops[2] = {
3405 {
3406 .owner = THIS_MODULE,
3407 .write = snd_pcm_write,
3408 .writev = snd_pcm_writev,
3409 .open = snd_pcm_playback_open,
3410 .release = snd_pcm_release,
3411 .poll = snd_pcm_playback_poll,
3412 .unlocked_ioctl = snd_pcm_playback_ioctl,
3413 .compat_ioctl = snd_pcm_ioctl_compat,
3414 .mmap = snd_pcm_mmap,
3415 .fasync = snd_pcm_fasync,
3416 },
3417 {
3418 .owner = THIS_MODULE,
3419 .read = snd_pcm_read,
3420 .readv = snd_pcm_readv,
3421 .open = snd_pcm_capture_open,
3422 .release = snd_pcm_release,
3423 .poll = snd_pcm_capture_poll,
3424 .unlocked_ioctl = snd_pcm_capture_ioctl,
3425 .compat_ioctl = snd_pcm_ioctl_compat,
3426 .mmap = snd_pcm_mmap,
3427 .fasync = snd_pcm_fasync,
3428 }
3429 };
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree