Branch data Line data Source code
1 : : /*
2 : : * Digital Audio (PCM) abstract layer
3 : : * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
4 : : *
5 : : *
6 : : * This program is free software; you can redistribute it and/or modify
7 : : * it under the terms of the GNU General Public License as published by
8 : : * the Free Software Foundation; either version 2 of the License, or
9 : : * (at your option) any later version.
10 : : *
11 : : * This program is distributed in the hope that it will be useful,
12 : : * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 : : * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 : : * GNU General Public License for more details.
15 : : *
16 : : * You should have received a copy of the GNU General Public License
17 : : * along with this program; if not, write to the Free Software
18 : : * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 : : *
20 : : */
21 : :
22 : : #include <linux/mm.h>
23 : : #include <linux/module.h>
24 : : #include <linux/file.h>
25 : : #include <linux/slab.h>
26 : : #include <linux/time.h>
27 : : #include <linux/pm_qos.h>
28 : : #include <linux/aio.h>
29 : : #include <linux/dma-mapping.h>
30 : : #include <sound/core.h>
31 : : #include <sound/control.h>
32 : : #include <sound/info.h>
33 : : #include <sound/pcm.h>
34 : : #include <sound/pcm_params.h>
35 : : #include <sound/timer.h>
36 : : #include <sound/minors.h>
37 : : #include <asm/io.h>
38 : : #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
39 : : #include <dma-coherence.h>
40 : : #endif
41 : :
42 : : /*
43 : : * Compatibility
44 : : */
45 : :
46 : : struct snd_pcm_hw_params_old {
47 : : unsigned int flags;
48 : : unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
49 : : SNDRV_PCM_HW_PARAM_ACCESS + 1];
50 : : struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
51 : : SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
52 : : unsigned int rmask;
53 : : unsigned int cmask;
54 : : unsigned int info;
55 : : unsigned int msbits;
56 : : unsigned int rate_num;
57 : : unsigned int rate_den;
58 : : snd_pcm_uframes_t fifo_size;
59 : : unsigned char reserved[64];
60 : : };
61 : :
62 : : #ifdef CONFIG_SND_SUPPORT_OLD_API
63 : : #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
64 : : #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
65 : :
66 : : static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
67 : : struct snd_pcm_hw_params_old __user * _oparams);
68 : : static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
69 : : struct snd_pcm_hw_params_old __user * _oparams);
70 : : #endif
71 : : static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
72 : :
73 : : /*
74 : : *
75 : : */
76 : :
77 : : DEFINE_RWLOCK(snd_pcm_link_rwlock);
78 : : EXPORT_SYMBOL(snd_pcm_link_rwlock);
79 : :
80 : : static DECLARE_RWSEM(snd_pcm_link_rwsem);
81 : :
82 : : static inline mm_segment_t snd_enter_user(void)
83 : : {
84 : 0 : mm_segment_t fs = get_fs();
85 : : set_fs(get_ds());
86 : : return fs;
87 : : }
88 : :
89 : : static inline void snd_leave_user(mm_segment_t fs)
90 : : {
91 : : set_fs(fs);
92 : : }
93 : :
94 : :
95 : :
96 : 0 : int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
97 : : {
98 : : struct snd_pcm_runtime *runtime;
99 : 4 : struct snd_pcm *pcm = substream->pcm;
100 : 4 : struct snd_pcm_str *pstr = substream->pstr;
101 : :
102 : 4 : memset(info, 0, sizeof(*info));
103 : 4 : info->card = pcm->card->number;
104 : 4 : info->device = pcm->device;
105 : 4 : info->stream = substream->stream;
106 : 4 : info->subdevice = substream->number;
107 : 4 : strlcpy(info->id, pcm->id, sizeof(info->id));
108 : 4 : strlcpy(info->name, pcm->name, sizeof(info->name));
109 : 4 : info->dev_class = pcm->dev_class;
110 : 4 : info->dev_subclass = pcm->dev_subclass;
111 : 4 : info->subdevices_count = pstr->substream_count;
112 : 4 : info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
113 : 4 : strlcpy(info->subname, substream->name, sizeof(info->subname));
114 : 4 : runtime = substream->runtime;
115 : : /* AB: FIXME!!! This is definitely nonsense */
116 [ - + ]: 4 : if (runtime) {
117 : 0 : info->sync = runtime->sync;
118 : 0 : substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
119 : : }
120 : 0 : return 0;
121 : : }
122 : :
123 : 0 : int snd_pcm_info_user(struct snd_pcm_substream *substream,
124 : : struct snd_pcm_info __user * _info)
125 : : {
126 : : struct snd_pcm_info *info;
127 : : int err;
128 : :
129 : : info = kmalloc(sizeof(*info), GFP_KERNEL);
130 [ # # ]: 0 : if (! info)
131 : : return -ENOMEM;
132 : 0 : err = snd_pcm_info(substream, info);
133 [ # # ]: 0 : if (err >= 0) {
134 [ # # ]: 0 : if (copy_to_user(_info, info, sizeof(*info)))
135 : : err = -EFAULT;
136 : : }
137 : 0 : kfree(info);
138 : 0 : return err;
139 : : }
140 : :
141 : : #undef RULES_DEBUG
142 : :
143 : : #ifdef RULES_DEBUG
144 : : #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
145 : : static const char * const snd_pcm_hw_param_names[] = {
146 : : HW_PARAM(ACCESS),
147 : : HW_PARAM(FORMAT),
148 : : HW_PARAM(SUBFORMAT),
149 : : HW_PARAM(SAMPLE_BITS),
150 : : HW_PARAM(FRAME_BITS),
151 : : HW_PARAM(CHANNELS),
152 : : HW_PARAM(RATE),
153 : : HW_PARAM(PERIOD_TIME),
154 : : HW_PARAM(PERIOD_SIZE),
155 : : HW_PARAM(PERIOD_BYTES),
156 : : HW_PARAM(PERIODS),
157 : : HW_PARAM(BUFFER_TIME),
158 : : HW_PARAM(BUFFER_SIZE),
159 : : HW_PARAM(BUFFER_BYTES),
160 : : HW_PARAM(TICK_TIME),
161 : : };
162 : : #endif
163 : :
164 : 0 : int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
165 : : struct snd_pcm_hw_params *params)
166 : : {
167 : : unsigned int k;
168 : : struct snd_pcm_hardware *hw;
169 : 0 : struct snd_interval *i = NULL;
170 : : struct snd_mask *m = NULL;
171 : 0 : struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
172 : 0 : unsigned int rstamps[constrs->rules_num];
173 : : unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
174 : : unsigned int stamp = 2;
175 : : int changed, again;
176 : :
177 : 0 : params->info = 0;
178 : 0 : params->fifo_size = 0;
179 [ # # ]: 0 : if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
180 : 0 : params->msbits = 0;
181 [ # # ]: 0 : if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
182 : 0 : params->rate_num = 0;
183 : 0 : params->rate_den = 0;
184 : : }
185 : :
186 [ # # ]: 0 : for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
187 : 0 : m = hw_param_mask(params, k);
188 [ # # ]: 0 : if (snd_mask_empty(m))
189 : : return -EINVAL;
190 [ # # ]: 0 : if (!(params->rmask & (1 << k)))
191 : 0 : continue;
192 : : #ifdef RULES_DEBUG
193 : : printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
194 : : printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
195 : : #endif
196 : 0 : changed = snd_mask_refine(m, constrs_mask(constrs, k));
197 : : #ifdef RULES_DEBUG
198 : : printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
199 : : #endif
200 [ # # ]: 0 : if (changed)
201 : 0 : params->cmask |= 1 << k;
202 [ # # ]: 0 : if (changed < 0)
203 : : return changed;
204 : : }
205 : :
206 [ # # ]: 0 : for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
207 : 0 : i = hw_param_interval(params, k);
208 [ # # ]: 0 : if (snd_interval_empty(i))
209 : : return -EINVAL;
210 [ # # ]: 0 : if (!(params->rmask & (1 << k)))
211 : 0 : continue;
212 : : #ifdef RULES_DEBUG
213 : : printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
214 : : if (i->empty)
215 : : printk("empty");
216 : : else
217 : : printk("%c%u %u%c",
218 : : i->openmin ? '(' : '[', i->min,
219 : : i->max, i->openmax ? ')' : ']');
220 : : printk(" -> ");
221 : : #endif
222 : 0 : changed = snd_interval_refine(i, constrs_interval(constrs, k));
223 : : #ifdef RULES_DEBUG
224 : : if (i->empty)
225 : : printk("empty\n");
226 : : else
227 : : printk("%c%u %u%c\n",
228 : : i->openmin ? '(' : '[', i->min,
229 : : i->max, i->openmax ? ')' : ']');
230 : : #endif
231 [ # # ]: 0 : if (changed)
232 : 0 : params->cmask |= 1 << k;
233 [ # # ]: 0 : if (changed < 0)
234 : : return changed;
235 : : }
236 : :
237 [ # # ]: 0 : for (k = 0; k < constrs->rules_num; k++)
238 : 0 : rstamps[k] = 0;
239 [ # # ]: 0 : for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
240 : 0 : vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
241 : : do {
242 : : again = 0;
243 [ # # ]: 0 : for (k = 0; k < constrs->rules_num; k++) {
244 : 0 : struct snd_pcm_hw_rule *r = &constrs->rules[k];
245 : : unsigned int d;
246 : : int doit = 0;
247 [ # # ][ # # ]: 0 : if (r->cond && !(r->cond & params->flags))
248 : 0 : continue;
249 [ # # ]: 0 : for (d = 0; r->deps[d] >= 0; d++) {
250 [ # # ]: 0 : if (vstamps[r->deps[d]] > rstamps[k]) {
251 : : doit = 1;
252 : : break;
253 : : }
254 : : }
255 [ # # ]: 0 : if (!doit)
256 : 0 : continue;
257 : : #ifdef RULES_DEBUG
258 : : printk(KERN_DEBUG "Rule %d [%p]: ", k, r->func);
259 : : if (r->var >= 0) {
260 : : printk("%s = ", snd_pcm_hw_param_names[r->var]);
261 : : if (hw_is_mask(r->var)) {
262 : : m = hw_param_mask(params, r->var);
263 : : printk("%x", *m->bits);
264 : : } else {
265 : : i = hw_param_interval(params, r->var);
266 : : if (i->empty)
267 : : printk("empty");
268 : : else
269 : : printk("%c%u %u%c",
270 : : i->openmin ? '(' : '[', i->min,
271 : : i->max, i->openmax ? ')' : ']');
272 : : }
273 : : }
274 : : #endif
275 : 0 : changed = r->func(params, r);
276 : : #ifdef RULES_DEBUG
277 : : if (r->var >= 0) {
278 : : printk(" -> ");
279 : : if (hw_is_mask(r->var))
280 : : printk("%x", *m->bits);
281 : : else {
282 : : if (i->empty)
283 : : printk("empty");
284 : : else
285 : : printk("%c%u %u%c",
286 : : i->openmin ? '(' : '[', i->min,
287 : : i->max, i->openmax ? ')' : ']');
288 : : }
289 : : }
290 : : printk("\n");
291 : : #endif
292 : 0 : rstamps[k] = stamp;
293 [ # # ][ # # ]: 0 : if (changed && r->var >= 0) {
294 : 0 : params->cmask |= (1 << r->var);
295 : 0 : vstamps[r->var] = stamp;
296 : : again = 1;
297 : : }
298 [ # # ]: 0 : if (changed < 0)
299 : : return changed;
300 : 0 : stamp++;
301 : : }
302 [ # # ]: 0 : } while (again);
303 [ # # ]: 0 : if (!params->msbits) {
304 : : i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
305 [ # # ]: 0 : if (snd_interval_single(i))
306 : 0 : params->msbits = snd_interval_value(i);
307 : : }
308 : :
309 [ # # ]: 0 : if (!params->rate_den) {
310 : : i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
311 [ # # ]: 0 : if (snd_interval_single(i)) {
312 : 0 : params->rate_num = snd_interval_value(i);
313 : 0 : params->rate_den = 1;
314 : : }
315 : : }
316 : :
317 : 0 : hw = &substream->runtime->hw;
318 [ # # ]: 0 : if (!params->info)
319 : 0 : params->info = hw->info & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES;
320 [ # # ]: 0 : if (!params->fifo_size) {
321 : : m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
322 : : i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
323 [ # # ][ # # ]: 0 : if (snd_mask_min(m) == snd_mask_max(m) &&
324 : : snd_interval_min(i) == snd_interval_max(i)) {
325 : 0 : changed = substream->ops->ioctl(substream,
326 : : SNDRV_PCM_IOCTL1_FIFO_SIZE, params);
327 [ # # ]: 0 : if (changed < 0)
328 : : return changed;
329 : : }
330 : : }
331 : 0 : params->rmask = 0;
332 : 0 : return 0;
333 : : }
334 : :
335 : : EXPORT_SYMBOL(snd_pcm_hw_refine);
336 : :
337 : 0 : static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
338 : : struct snd_pcm_hw_params __user * _params)
339 : : {
340 : : struct snd_pcm_hw_params *params;
341 : : int err;
342 : :
343 : 0 : params = memdup_user(_params, sizeof(*params));
344 [ # # ]: 0 : if (IS_ERR(params))
345 : 0 : return PTR_ERR(params);
346 : :
347 : 0 : err = snd_pcm_hw_refine(substream, params);
348 [ # # ]: 0 : if (copy_to_user(_params, params, sizeof(*params))) {
349 [ # # ]: 0 : if (!err)
350 : : err = -EFAULT;
351 : : }
352 : :
353 : 0 : kfree(params);
354 : 0 : return err;
355 : : }
356 : :
357 : : static int period_to_usecs(struct snd_pcm_runtime *runtime)
358 : : {
359 : : int usecs;
360 : :
361 [ # # ]: 0 : if (! runtime->rate)
362 : : return -1; /* invalid */
363 : :
364 : : /* take 75% of period time as the deadline */
365 : 0 : usecs = (750000 / runtime->rate) * runtime->period_size;
366 : 0 : usecs += ((750000 % runtime->rate) * runtime->period_size) /
367 : : runtime->rate;
368 : :
369 : : return usecs;
370 : : }
371 : :
372 : 0 : static void snd_pcm_set_state(struct snd_pcm_substream *substream, int state)
373 : : {
374 : : snd_pcm_stream_lock_irq(substream);
375 [ # # ]: 0 : if (substream->runtime->status->state != SNDRV_PCM_STATE_DISCONNECTED)
376 : 0 : substream->runtime->status->state = state;
377 : : snd_pcm_stream_unlock_irq(substream);
378 : 0 : }
379 : :
380 : 0 : static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
381 : : struct snd_pcm_hw_params *params)
382 : : {
383 : 0 : struct snd_pcm_runtime *runtime;
384 : : int err, usecs;
385 : : unsigned int bits;
386 : : snd_pcm_uframes_t frames;
387 : :
388 [ # # ][ # # ]: 0 : if (PCM_RUNTIME_CHECK(substream))
[ # # ]
389 : : return -ENXIO;
390 : 0 : runtime = substream->runtime;
391 : : snd_pcm_stream_lock_irq(substream);
392 [ # # ]: 0 : switch (runtime->status->state) {
393 : : case SNDRV_PCM_STATE_OPEN:
394 : : case SNDRV_PCM_STATE_SETUP:
395 : : case SNDRV_PCM_STATE_PREPARED:
396 : : break;
397 : : default:
398 : : snd_pcm_stream_unlock_irq(substream);
399 : 0 : return -EBADFD;
400 : : }
401 : : snd_pcm_stream_unlock_irq(substream);
402 : : #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
403 : : if (!substream->oss.oss)
404 : : #endif
405 [ # # ]: 0 : if (atomic_read(&substream->mmap_count))
406 : : return -EBADFD;
407 : :
408 : 0 : params->rmask = ~0U;
409 : 0 : err = snd_pcm_hw_refine(substream, params);
410 [ # # ]: 0 : if (err < 0)
411 : : goto _error;
412 : :
413 : 0 : err = snd_pcm_hw_params_choose(substream, params);
414 [ # # ]: 0 : if (err < 0)
415 : : goto _error;
416 : :
417 [ # # ]: 0 : if (substream->ops->hw_params != NULL) {
418 : 0 : err = substream->ops->hw_params(substream, params);
419 [ # # ]: 0 : if (err < 0)
420 : : goto _error;
421 : : }
422 : :
423 : 0 : runtime->access = params_access(params);
424 : 0 : runtime->format = params_format(params);
425 : 0 : runtime->subformat = params_subformat(params);
426 : 0 : runtime->channels = params_channels(params);
427 : 0 : runtime->rate = params_rate(params);
428 : 0 : runtime->period_size = params_period_size(params);
429 : 0 : runtime->periods = params_periods(params);
430 : 0 : runtime->buffer_size = params_buffer_size(params);
431 : 0 : runtime->info = params->info;
432 : 0 : runtime->rate_num = params->rate_num;
433 : 0 : runtime->rate_den = params->rate_den;
434 : 0 : runtime->no_period_wakeup =
435 [ # # ][ # # ]: 0 : (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) &&
436 : 0 : (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP);
437 : :
438 : 0 : bits = snd_pcm_format_physical_width(runtime->format);
439 : 0 : runtime->sample_bits = bits;
440 : 0 : bits *= runtime->channels;
441 : 0 : runtime->frame_bits = bits;
442 : : frames = 1;
443 [ # # ]: 0 : while (bits % 8 != 0) {
444 : 0 : bits *= 2;
445 : 0 : frames *= 2;
446 : : }
447 : 0 : runtime->byte_align = bits / 8;
448 : 0 : runtime->min_align = frames;
449 : :
450 : : /* Default sw params */
451 : 0 : runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
452 : 0 : runtime->period_step = 1;
453 : 0 : runtime->control->avail_min = runtime->period_size;
454 : 0 : runtime->start_threshold = 1;
455 : 0 : runtime->stop_threshold = runtime->buffer_size;
456 : 0 : runtime->silence_threshold = 0;
457 : 0 : runtime->silence_size = 0;
458 : 0 : runtime->boundary = runtime->buffer_size;
459 [ # # ]: 0 : while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
460 : 0 : runtime->boundary *= 2;
461 : :
462 : 0 : snd_pcm_timer_resolution_change(substream);
463 : 0 : snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP);
464 : :
465 [ # # ]: 0 : if (pm_qos_request_active(&substream->latency_pm_qos_req))
466 : 0 : pm_qos_remove_request(&substream->latency_pm_qos_req);
467 [ # # ]: 0 : if ((usecs = period_to_usecs(runtime)) >= 0)
468 : 0 : pm_qos_add_request(&substream->latency_pm_qos_req,
469 : : PM_QOS_CPU_DMA_LATENCY, usecs);
470 : : return 0;
471 : : _error:
472 : : /* hardware might be unusable from this time,
473 : : so we force application to retry to set
474 : : the correct hardware parameter settings */
475 : 0 : snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
476 [ # # ]: 0 : if (substream->ops->hw_free != NULL)
477 : 0 : substream->ops->hw_free(substream);
478 : 0 : return err;
479 : : }
480 : :
481 : 0 : static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
482 : : struct snd_pcm_hw_params __user * _params)
483 : : {
484 : : struct snd_pcm_hw_params *params;
485 : : int err;
486 : :
487 : 0 : params = memdup_user(_params, sizeof(*params));
488 [ # # ]: 0 : if (IS_ERR(params))
489 : 0 : return PTR_ERR(params);
490 : :
491 : 0 : err = snd_pcm_hw_params(substream, params);
492 [ # # ]: 0 : if (copy_to_user(_params, params, sizeof(*params))) {
493 [ # # ]: 0 : if (!err)
494 : : err = -EFAULT;
495 : : }
496 : :
497 : 0 : kfree(params);
498 : 0 : return err;
499 : : }
500 : :
501 : 0 : static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
502 : : {
503 : : struct snd_pcm_runtime *runtime;
504 : : int result = 0;
505 : :
506 [ # # ][ # # ]: 0 : if (PCM_RUNTIME_CHECK(substream))
[ # # ]
507 : : return -ENXIO;
508 : 0 : runtime = substream->runtime;
509 : : snd_pcm_stream_lock_irq(substream);
510 [ # # ]: 0 : switch (runtime->status->state) {
511 : : case SNDRV_PCM_STATE_SETUP:
512 : : case SNDRV_PCM_STATE_PREPARED:
513 : : break;
514 : : default:
515 : : snd_pcm_stream_unlock_irq(substream);
516 : 0 : return -EBADFD;
517 : : }
518 : : snd_pcm_stream_unlock_irq(substream);
519 [ # # ]: 0 : if (atomic_read(&substream->mmap_count))
520 : : return -EBADFD;
521 [ # # ]: 0 : if (substream->ops->hw_free)
522 : 0 : result = substream->ops->hw_free(substream);
523 : 0 : snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
524 : 0 : pm_qos_remove_request(&substream->latency_pm_qos_req);
525 : 0 : return result;
526 : : }
527 : :
528 : 0 : static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
529 : : struct snd_pcm_sw_params *params)
530 : : {
531 : : struct snd_pcm_runtime *runtime;
532 : : int err;
533 : :
534 [ # # ][ # # ]: 0 : if (PCM_RUNTIME_CHECK(substream))
[ # # ]
535 : : return -ENXIO;
536 : 0 : runtime = substream->runtime;
537 : : snd_pcm_stream_lock_irq(substream);
538 [ # # ]: 0 : if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
539 : : snd_pcm_stream_unlock_irq(substream);
540 : 0 : return -EBADFD;
541 : : }
542 : : snd_pcm_stream_unlock_irq(substream);
543 : :
544 [ # # ]: 0 : if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
545 : : return -EINVAL;
546 [ # # ]: 0 : if (params->avail_min == 0)
547 : : return -EINVAL;
548 [ # # ]: 0 : if (params->silence_size >= runtime->boundary) {
549 [ # # ]: 0 : if (params->silence_threshold != 0)
550 : : return -EINVAL;
551 : : } else {
552 [ # # ]: 0 : if (params->silence_size > params->silence_threshold)
553 : : return -EINVAL;
554 [ # # ]: 0 : if (params->silence_threshold > runtime->buffer_size)
555 : : return -EINVAL;
556 : : }
557 : : err = 0;
558 : : snd_pcm_stream_lock_irq(substream);
559 : 0 : runtime->tstamp_mode = params->tstamp_mode;
560 : 0 : runtime->period_step = params->period_step;
561 : 0 : runtime->control->avail_min = params->avail_min;
562 : 0 : runtime->start_threshold = params->start_threshold;
563 : 0 : runtime->stop_threshold = params->stop_threshold;
564 : 0 : runtime->silence_threshold = params->silence_threshold;
565 : 0 : runtime->silence_size = params->silence_size;
566 : 0 : params->boundary = runtime->boundary;
567 [ # # ]: 0 : if (snd_pcm_running(substream)) {
568 [ # # ][ # # ]: 0 : if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
569 : 0 : runtime->silence_size > 0)
570 : 0 : snd_pcm_playback_silence(substream, ULONG_MAX);
571 : 0 : err = snd_pcm_update_state(substream, runtime);
572 : : }
573 : : snd_pcm_stream_unlock_irq(substream);
574 : 0 : return err;
575 : : }
576 : :
577 : 0 : static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
578 : : struct snd_pcm_sw_params __user * _params)
579 : : {
580 : : struct snd_pcm_sw_params params;
581 : : int err;
582 [ # # ]: 0 : if (copy_from_user(¶ms, _params, sizeof(params)))
583 : : return -EFAULT;
584 : 0 : err = snd_pcm_sw_params(substream, ¶ms);
585 [ # # ]: 0 : if (copy_to_user(_params, ¶ms, sizeof(params)))
586 : : return -EFAULT;
587 : 0 : return err;
588 : : }
589 : :
590 : 0 : int snd_pcm_status(struct snd_pcm_substream *substream,
591 : : struct snd_pcm_status *status)
592 : : {
593 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
594 : :
595 : : snd_pcm_stream_lock_irq(substream);
596 : 0 : status->state = runtime->status->state;
597 : 0 : status->suspended_state = runtime->status->suspended_state;
598 [ # # ]: 0 : if (status->state == SNDRV_PCM_STATE_OPEN)
599 : : goto _end;
600 : 0 : status->trigger_tstamp = runtime->trigger_tstamp;
601 [ # # ]: 0 : if (snd_pcm_running(substream)) {
602 : 0 : snd_pcm_update_hw_ptr(substream);
603 [ # # ]: 0 : if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
604 : 0 : status->tstamp = runtime->status->tstamp;
605 : 0 : status->audio_tstamp =
606 : 0 : runtime->status->audio_tstamp;
607 : 0 : goto _tstamp_end;
608 : : }
609 : : }
610 : 0 : snd_pcm_gettime(runtime, &status->tstamp);
611 : : _tstamp_end:
612 : 0 : status->appl_ptr = runtime->control->appl_ptr;
613 : 0 : status->hw_ptr = runtime->status->hw_ptr;
614 [ # # ]: 0 : if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
615 : 0 : status->avail = snd_pcm_playback_avail(runtime);
616 [ # # ]: 0 : if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
617 : : runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
618 : 0 : status->delay = runtime->buffer_size - status->avail;
619 : 0 : status->delay += runtime->delay;
620 : : } else
621 : 0 : status->delay = 0;
622 : : } else {
623 : 0 : status->avail = snd_pcm_capture_avail(runtime);
624 [ # # ]: 0 : if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
625 : 0 : status->delay = status->avail + runtime->delay;
626 : : else
627 : 0 : status->delay = 0;
628 : : }
629 : 0 : status->avail_max = runtime->avail_max;
630 : 0 : status->overrange = runtime->overrange;
631 : 0 : runtime->avail_max = 0;
632 : 0 : runtime->overrange = 0;
633 : : _end:
634 : : snd_pcm_stream_unlock_irq(substream);
635 : 0 : return 0;
636 : : }
637 : :
638 : 0 : static int snd_pcm_status_user(struct snd_pcm_substream *substream,
639 : : struct snd_pcm_status __user * _status)
640 : : {
641 : : struct snd_pcm_status status;
642 : : int res;
643 : :
644 : 0 : memset(&status, 0, sizeof(status));
645 : 0 : res = snd_pcm_status(substream, &status);
646 [ # # ]: 0 : if (res < 0)
647 : : return res;
648 [ # # ]: 0 : if (copy_to_user(_status, &status, sizeof(status)))
649 : : return -EFAULT;
650 : 0 : return 0;
651 : : }
652 : :
653 : 0 : static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
654 : : struct snd_pcm_channel_info * info)
655 : : {
656 : : struct snd_pcm_runtime *runtime;
657 : : unsigned int channel;
658 : :
659 : 0 : channel = info->channel;
660 : 0 : runtime = substream->runtime;
661 : : snd_pcm_stream_lock_irq(substream);
662 [ # # ]: 0 : if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
663 : : snd_pcm_stream_unlock_irq(substream);
664 : 0 : return -EBADFD;
665 : : }
666 : : snd_pcm_stream_unlock_irq(substream);
667 [ # # ]: 0 : if (channel >= runtime->channels)
668 : : return -EINVAL;
669 : 0 : memset(info, 0, sizeof(*info));
670 : 0 : info->channel = channel;
671 : 0 : return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
672 : : }
673 : :
674 : 0 : static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
675 : : struct snd_pcm_channel_info __user * _info)
676 : : {
677 : : struct snd_pcm_channel_info info;
678 : : int res;
679 : :
680 [ # # ]: 0 : if (copy_from_user(&info, _info, sizeof(info)))
681 : : return -EFAULT;
682 : 0 : res = snd_pcm_channel_info(substream, &info);
683 [ # # ]: 0 : if (res < 0)
684 : : return res;
685 [ # # ]: 0 : if (copy_to_user(_info, &info, sizeof(info)))
686 : : return -EFAULT;
687 : 0 : return 0;
688 : : }
689 : :
690 : 0 : static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
691 : : {
692 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
693 [ # # ]: 0 : if (runtime->trigger_master == NULL)
694 : 0 : return;
695 [ # # ]: 0 : if (runtime->trigger_master == substream) {
696 : 0 : snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
697 : : } else {
698 : 0 : snd_pcm_trigger_tstamp(runtime->trigger_master);
699 : 0 : runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
700 : : }
701 : 0 : runtime->trigger_master = NULL;
702 : : }
703 : :
704 : : struct action_ops {
705 : : int (*pre_action)(struct snd_pcm_substream *substream, int state);
706 : : int (*do_action)(struct snd_pcm_substream *substream, int state);
707 : : void (*undo_action)(struct snd_pcm_substream *substream, int state);
708 : : void (*post_action)(struct snd_pcm_substream *substream, int state);
709 : : };
710 : :
711 : : /*
712 : : * this functions is core for handling of linked stream
713 : : * Note: the stream state might be changed also on failure
714 : : * Note2: call with calling stream lock + link lock
715 : : */
716 : 0 : static int snd_pcm_action_group(struct action_ops *ops,
717 : : struct snd_pcm_substream *substream,
718 : : int state, int do_lock)
719 : : {
720 : : struct snd_pcm_substream *s = NULL;
721 : : struct snd_pcm_substream *s1;
722 : : int res = 0;
723 : :
724 [ # # ]: 0 : snd_pcm_group_for_each_entry(s, substream) {
725 [ # # ]: 0 : if (do_lock && s != substream)
726 : 0 : spin_lock_nested(&s->self_group.lock,
727 : : SINGLE_DEPTH_NESTING);
728 : 0 : res = ops->pre_action(s, state);
729 [ # # ]: 0 : if (res < 0)
730 : : goto _unlock;
731 : : }
732 [ # # ]: 0 : snd_pcm_group_for_each_entry(s, substream) {
733 : 0 : res = ops->do_action(s, state);
734 [ # # ]: 0 : if (res < 0) {
735 [ # # ]: 0 : if (ops->undo_action) {
736 [ # # ]: 0 : snd_pcm_group_for_each_entry(s1, substream) {
737 [ # # ]: 0 : if (s1 == s) /* failed stream */
738 : : break;
739 : 0 : ops->undo_action(s1, state);
740 : : }
741 : : }
742 : : s = NULL; /* unlock all */
743 : : goto _unlock;
744 : : }
745 : : }
746 [ # # ]: 0 : snd_pcm_group_for_each_entry(s, substream) {
747 : 0 : ops->post_action(s, state);
748 : : }
749 : : _unlock:
750 [ # # ]: 0 : if (do_lock) {
751 : : /* unlock streams */
752 [ # # ]: 0 : snd_pcm_group_for_each_entry(s1, substream) {
753 [ # # ]: 0 : if (s1 != substream)
754 : : spin_unlock(&s1->self_group.lock);
755 [ # # ]: 0 : if (s1 == s) /* end */
756 : : break;
757 : : }
758 : : }
759 : 0 : return res;
760 : : }
761 : :
762 : : /*
763 : : * Note: call with stream lock
764 : : */
765 : 0 : static int snd_pcm_action_single(struct action_ops *ops,
766 : : struct snd_pcm_substream *substream,
767 : : int state)
768 : : {
769 : : int res;
770 : :
771 : 0 : res = ops->pre_action(substream, state);
772 [ # # ]: 0 : if (res < 0)
773 : : return res;
774 : 0 : res = ops->do_action(substream, state);
775 [ # # ]: 0 : if (res == 0)
776 : 0 : ops->post_action(substream, state);
777 [ # # ]: 0 : else if (ops->undo_action)
778 : 0 : ops->undo_action(substream, state);
779 : 0 : return res;
780 : : }
781 : :
782 : : /*
783 : : * Note: call with stream lock
784 : : */
785 : 0 : static int snd_pcm_action(struct action_ops *ops,
786 : : struct snd_pcm_substream *substream,
787 : : int state)
788 : : {
789 : : int res;
790 : :
791 [ # # ]: 0 : if (snd_pcm_stream_linked(substream)) {
792 [ # # ]: 0 : if (!spin_trylock(&substream->group->lock)) {
793 : : spin_unlock(&substream->self_group.lock);
794 : 0 : spin_lock(&substream->group->lock);
795 : : spin_lock(&substream->self_group.lock);
796 : : }
797 : 0 : res = snd_pcm_action_group(ops, substream, state, 1);
798 : 0 : spin_unlock(&substream->group->lock);
799 : : } else {
800 : 0 : res = snd_pcm_action_single(ops, substream, state);
801 : : }
802 : 0 : return res;
803 : : }
804 : :
805 : : /*
806 : : * Note: don't use any locks before
807 : : */
808 : 0 : static int snd_pcm_action_lock_irq(struct action_ops *ops,
809 : : struct snd_pcm_substream *substream,
810 : : int state)
811 : : {
812 : : int res;
813 : :
814 : 0 : read_lock_irq(&snd_pcm_link_rwlock);
815 [ # # ]: 0 : if (snd_pcm_stream_linked(substream)) {
816 : : spin_lock(&substream->group->lock);
817 : : spin_lock(&substream->self_group.lock);
818 : 0 : res = snd_pcm_action_group(ops, substream, state, 1);
819 : : spin_unlock(&substream->self_group.lock);
820 : 0 : spin_unlock(&substream->group->lock);
821 : : } else {
822 : : spin_lock(&substream->self_group.lock);
823 : 0 : res = snd_pcm_action_single(ops, substream, state);
824 : : spin_unlock(&substream->self_group.lock);
825 : : }
826 : : read_unlock_irq(&snd_pcm_link_rwlock);
827 : 0 : return res;
828 : : }
829 : :
830 : : /*
831 : : */
832 : 0 : static int snd_pcm_action_nonatomic(struct action_ops *ops,
833 : : struct snd_pcm_substream *substream,
834 : : int state)
835 : : {
836 : : int res;
837 : :
838 : 0 : down_read(&snd_pcm_link_rwsem);
839 [ # # ]: 0 : if (snd_pcm_stream_linked(substream))
840 : 0 : res = snd_pcm_action_group(ops, substream, state, 0);
841 : : else
842 : 0 : res = snd_pcm_action_single(ops, substream, state);
843 : 0 : up_read(&snd_pcm_link_rwsem);
844 : 0 : return res;
845 : : }
846 : :
847 : : /*
848 : : * start callbacks
849 : : */
850 : 0 : static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
851 : : {
852 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
853 [ # # ]: 0 : if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
854 : : return -EBADFD;
855 [ # # ][ # # ]: 0 : if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
856 : : !snd_pcm_playback_data(substream))
857 : : return -EPIPE;
858 : 0 : runtime->trigger_master = substream;
859 : 0 : return 0;
860 : : }
861 : :
862 : 0 : static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
863 : : {
864 [ # # ][ # # ]: 0 : if (substream->runtime->trigger_master != substream)
865 : : return 0;
866 : 0 : return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
867 : : }
868 : :
869 : 0 : static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
870 : : {
871 [ # # ]: 0 : if (substream->runtime->trigger_master == substream)
872 : 0 : substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
873 : 0 : }
874 : :
875 : 0 : static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
876 : : {
877 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
878 : 0 : snd_pcm_trigger_tstamp(substream);
879 : 0 : runtime->hw_ptr_jiffies = jiffies;
880 : 0 : runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) /
881 : 0 : runtime->rate;
882 : 0 : runtime->status->state = state;
883 [ # # ][ # # ]: 0 : if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
884 : 0 : runtime->silence_size > 0)
885 : 0 : snd_pcm_playback_silence(substream, ULONG_MAX);
886 [ # # ]: 0 : if (substream->timer)
887 : 0 : snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
888 : : &runtime->trigger_tstamp);
889 : 0 : }
890 : :
891 : : static struct action_ops snd_pcm_action_start = {
892 : : .pre_action = snd_pcm_pre_start,
893 : : .do_action = snd_pcm_do_start,
894 : : .undo_action = snd_pcm_undo_start,
895 : : .post_action = snd_pcm_post_start
896 : : };
897 : :
898 : : /**
899 : : * snd_pcm_start - start all linked streams
900 : : * @substream: the PCM substream instance
901 : : *
902 : : * Return: Zero if successful, or a negative error code.
903 : : */
904 : 0 : int snd_pcm_start(struct snd_pcm_substream *substream)
905 : : {
906 : 0 : return snd_pcm_action(&snd_pcm_action_start, substream,
907 : : SNDRV_PCM_STATE_RUNNING);
908 : : }
909 : :
910 : : /*
911 : : * stop callbacks
912 : : */
913 : 0 : static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
914 : : {
915 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
916 [ # # ]: 0 : if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
917 : : return -EBADFD;
918 : 0 : runtime->trigger_master = substream;
919 : 0 : return 0;
920 : : }
921 : :
922 : 0 : static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
923 : : {
924 [ # # ][ # # ]: 0 : if (substream->runtime->trigger_master == substream &&
925 : : snd_pcm_running(substream))
926 : 0 : substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
927 : 0 : return 0; /* unconditonally stop all substreams */
928 : : }
929 : :
930 : 0 : static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
931 : : {
932 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
933 [ # # ]: 0 : if (runtime->status->state != state) {
934 : 0 : snd_pcm_trigger_tstamp(substream);
935 [ # # ]: 0 : if (substream->timer)
936 : 0 : snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
937 : : &runtime->trigger_tstamp);
938 : 0 : runtime->status->state = state;
939 : : }
940 : 0 : wake_up(&runtime->sleep);
941 : 0 : wake_up(&runtime->tsleep);
942 : 0 : }
943 : :
944 : : static struct action_ops snd_pcm_action_stop = {
945 : : .pre_action = snd_pcm_pre_stop,
946 : : .do_action = snd_pcm_do_stop,
947 : : .post_action = snd_pcm_post_stop
948 : : };
949 : :
950 : : /**
951 : : * snd_pcm_stop - try to stop all running streams in the substream group
952 : : * @substream: the PCM substream instance
953 : : * @state: PCM state after stopping the stream
954 : : *
955 : : * The state of each stream is then changed to the given state unconditionally.
956 : : *
957 : : * Return: Zero if succesful, or a negative error code.
958 : : */
959 : 0 : int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state)
960 : : {
961 : 0 : return snd_pcm_action(&snd_pcm_action_stop, substream, state);
962 : : }
963 : :
964 : : EXPORT_SYMBOL(snd_pcm_stop);
965 : :
966 : : /**
967 : : * snd_pcm_drain_done - stop the DMA only when the given stream is playback
968 : : * @substream: the PCM substream
969 : : *
970 : : * After stopping, the state is changed to SETUP.
971 : : * Unlike snd_pcm_stop(), this affects only the given stream.
972 : : *
973 : : * Return: Zero if succesful, or a negative error code.
974 : : */
975 : 0 : int snd_pcm_drain_done(struct snd_pcm_substream *substream)
976 : : {
977 : 0 : return snd_pcm_action_single(&snd_pcm_action_stop, substream,
978 : : SNDRV_PCM_STATE_SETUP);
979 : : }
980 : :
981 : : /*
982 : : * pause callbacks
983 : : */
984 : 0 : static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
985 : : {
986 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
987 [ # # ]: 0 : if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
988 : : return -ENOSYS;
989 [ # # ]: 0 : if (push) {
990 [ # # ]: 0 : if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
991 : : return -EBADFD;
992 [ # # ]: 0 : } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
993 : : return -EBADFD;
994 : 0 : runtime->trigger_master = substream;
995 : 0 : return 0;
996 : : }
997 : :
998 : 0 : static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
999 : : {
1000 [ # # ]: 0 : if (substream->runtime->trigger_master != substream)
1001 : : return 0;
1002 : : /* some drivers might use hw_ptr to recover from the pause -
1003 : : update the hw_ptr now */
1004 [ # # ]: 0 : if (push)
1005 : 0 : snd_pcm_update_hw_ptr(substream);
1006 : : /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
1007 : : * a delta between the current jiffies, this gives a large enough
1008 : : * delta, effectively to skip the check once.
1009 : : */
1010 : 0 : substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
1011 [ # # ]: 0 : return substream->ops->trigger(substream,
1012 : : push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
1013 : : SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
1014 : : }
1015 : :
1016 : 0 : static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
1017 : : {
1018 [ # # ]: 0 : if (substream->runtime->trigger_master == substream)
1019 [ # # ]: 0 : substream->ops->trigger(substream,
1020 : : push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
1021 : : SNDRV_PCM_TRIGGER_PAUSE_PUSH);
1022 : 0 : }
1023 : :
1024 : 0 : static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
1025 : : {
1026 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
1027 : 0 : snd_pcm_trigger_tstamp(substream);
1028 [ # # ]: 0 : if (push) {
1029 : 0 : runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1030 [ # # ]: 0 : if (substream->timer)
1031 : 0 : snd_timer_notify(substream->timer,
1032 : : SNDRV_TIMER_EVENT_MPAUSE,
1033 : : &runtime->trigger_tstamp);
1034 : 0 : wake_up(&runtime->sleep);
1035 : 0 : wake_up(&runtime->tsleep);
1036 : : } else {
1037 : 0 : runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1038 [ # # ]: 0 : if (substream->timer)
1039 : 0 : snd_timer_notify(substream->timer,
1040 : : SNDRV_TIMER_EVENT_MCONTINUE,
1041 : : &runtime->trigger_tstamp);
1042 : : }
1043 : 0 : }
1044 : :
1045 : : static struct action_ops snd_pcm_action_pause = {
1046 : : .pre_action = snd_pcm_pre_pause,
1047 : : .do_action = snd_pcm_do_pause,
1048 : : .undo_action = snd_pcm_undo_pause,
1049 : : .post_action = snd_pcm_post_pause
1050 : : };
1051 : :
1052 : : /*
1053 : : * Push/release the pause for all linked streams.
1054 : : */
1055 : : static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1056 : : {
1057 : 0 : return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1058 : : }
1059 : :
1060 : : #ifdef CONFIG_PM
1061 : : /* suspend */
1062 : :
1063 : 0 : static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1064 : : {
1065 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
1066 [ # # ]: 0 : if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1067 : : return -EBUSY;
1068 : 0 : runtime->trigger_master = substream;
1069 : 0 : return 0;
1070 : : }
1071 : :
1072 : 0 : static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1073 : : {
1074 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
1075 [ # # ]: 0 : if (runtime->trigger_master != substream)
1076 : : return 0;
1077 [ # # ]: 0 : if (! snd_pcm_running(substream))
1078 : : return 0;
1079 : 0 : substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1080 : 0 : return 0; /* suspend unconditionally */
1081 : : }
1082 : :
1083 : 0 : static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1084 : : {
1085 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
1086 : 0 : snd_pcm_trigger_tstamp(substream);
1087 [ # # ]: 0 : if (substream->timer)
1088 : 0 : snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1089 : : &runtime->trigger_tstamp);
1090 : 0 : runtime->status->suspended_state = runtime->status->state;
1091 : 0 : runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1092 : 0 : wake_up(&runtime->sleep);
1093 : 0 : wake_up(&runtime->tsleep);
1094 : 0 : }
1095 : :
1096 : : static struct action_ops snd_pcm_action_suspend = {
1097 : : .pre_action = snd_pcm_pre_suspend,
1098 : : .do_action = snd_pcm_do_suspend,
1099 : : .post_action = snd_pcm_post_suspend
1100 : : };
1101 : :
1102 : : /**
1103 : : * snd_pcm_suspend - trigger SUSPEND to all linked streams
1104 : : * @substream: the PCM substream
1105 : : *
1106 : : * After this call, all streams are changed to SUSPENDED state.
1107 : : *
1108 : : * Return: Zero if successful (or @substream is %NULL), or a negative error
1109 : : * code.
1110 : : */
1111 : 0 : int snd_pcm_suspend(struct snd_pcm_substream *substream)
1112 : : {
1113 : : int err;
1114 : : unsigned long flags;
1115 : :
1116 [ # # ]: 0 : if (! substream)
1117 : : return 0;
1118 : :
1119 : 0 : snd_pcm_stream_lock_irqsave(substream, flags);
1120 : 0 : err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1121 : 0 : snd_pcm_stream_unlock_irqrestore(substream, flags);
1122 : 0 : return err;
1123 : : }
1124 : :
1125 : : EXPORT_SYMBOL(snd_pcm_suspend);
1126 : :
1127 : : /**
1128 : : * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
1129 : : * @pcm: the PCM instance
1130 : : *
1131 : : * After this call, all streams are changed to SUSPENDED state.
1132 : : *
1133 : : * Return: Zero if successful (or @pcm is %NULL), or a negative error code.
1134 : : */
1135 : 0 : int snd_pcm_suspend_all(struct snd_pcm *pcm)
1136 : : {
1137 : : struct snd_pcm_substream *substream;
1138 : : int stream, err = 0;
1139 : :
1140 [ # # ]: 0 : if (! pcm)
1141 : : return 0;
1142 : :
1143 [ # # ]: 0 : for (stream = 0; stream < 2; stream++) {
1144 [ # # ]: 0 : for (substream = pcm->streams[stream].substream;
1145 : 0 : substream; substream = substream->next) {
1146 : : /* FIXME: the open/close code should lock this as well */
1147 [ # # ]: 0 : if (substream->runtime == NULL)
1148 : 0 : continue;
1149 : 0 : err = snd_pcm_suspend(substream);
1150 [ # # ]: 0 : if (err < 0 && err != -EBUSY)
1151 : : return err;
1152 : : }
1153 : : }
1154 : : return 0;
1155 : : }
1156 : :
1157 : : EXPORT_SYMBOL(snd_pcm_suspend_all);
1158 : :
1159 : : /* resume */
1160 : :
1161 : 0 : static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1162 : : {
1163 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
1164 [ # # ]: 0 : if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1165 : : return -ENOSYS;
1166 : 0 : runtime->trigger_master = substream;
1167 : 0 : return 0;
1168 : : }
1169 : :
1170 : 0 : static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1171 : : {
1172 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
1173 [ # # ]: 0 : if (runtime->trigger_master != substream)
1174 : : return 0;
1175 : : /* DMA not running previously? */
1176 [ # # ][ # # ]: 0 : if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1177 [ # # ]: 0 : (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1178 : 0 : substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1179 : : return 0;
1180 : 0 : return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1181 : : }
1182 : :
1183 : 0 : static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1184 : : {
1185 [ # # ][ # # ]: 0 : if (substream->runtime->trigger_master == substream &&
1186 : : snd_pcm_running(substream))
1187 : 0 : substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1188 : 0 : }
1189 : :
1190 : 0 : static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1191 : : {
1192 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
1193 : 0 : snd_pcm_trigger_tstamp(substream);
1194 [ # # ]: 0 : if (substream->timer)
1195 : 0 : snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1196 : : &runtime->trigger_tstamp);
1197 : 0 : runtime->status->state = runtime->status->suspended_state;
1198 : 0 : }
1199 : :
1200 : : static struct action_ops snd_pcm_action_resume = {
1201 : : .pre_action = snd_pcm_pre_resume,
1202 : : .do_action = snd_pcm_do_resume,
1203 : : .undo_action = snd_pcm_undo_resume,
1204 : : .post_action = snd_pcm_post_resume
1205 : : };
1206 : :
1207 : 0 : static int snd_pcm_resume(struct snd_pcm_substream *substream)
1208 : : {
1209 : 0 : struct snd_card *card = substream->pcm->card;
1210 : : int res;
1211 : :
1212 : : snd_power_lock(card);
1213 [ # # ]: 0 : if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1214 : 0 : res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1215 : : snd_power_unlock(card);
1216 : 0 : return res;
1217 : : }
1218 : :
1219 : : #else
1220 : :
1221 : : static int snd_pcm_resume(struct snd_pcm_substream *substream)
1222 : : {
1223 : : return -ENOSYS;
1224 : : }
1225 : :
1226 : : #endif /* CONFIG_PM */
1227 : :
1228 : : /*
1229 : : * xrun ioctl
1230 : : *
1231 : : * Change the RUNNING stream(s) to XRUN state.
1232 : : */
1233 : 0 : static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1234 : : {
1235 : 0 : struct snd_card *card = substream->pcm->card;
1236 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
1237 : : int result;
1238 : :
1239 : : snd_power_lock(card);
1240 [ # # ]: 0 : if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1241 : 0 : result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1242 [ # # ]: 0 : if (result < 0)
1243 : : goto _unlock;
1244 : : }
1245 : :
1246 : : snd_pcm_stream_lock_irq(substream);
1247 [ # # # ]: 0 : switch (runtime->status->state) {
1248 : : case SNDRV_PCM_STATE_XRUN:
1249 : : result = 0; /* already there */
1250 : : break;
1251 : : case SNDRV_PCM_STATE_RUNNING:
1252 : : result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1253 : 0 : break;
1254 : : default:
1255 : : result = -EBADFD;
1256 : : }
1257 : : snd_pcm_stream_unlock_irq(substream);
1258 : : _unlock:
1259 : : snd_power_unlock(card);
1260 : 0 : return result;
1261 : : }
1262 : :
1263 : : /*
1264 : : * reset ioctl
1265 : : */
1266 : 0 : static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1267 : : {
1268 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
1269 [ # # ][ # # ]: 0 : switch (runtime->status->state) {
1270 : : case SNDRV_PCM_STATE_RUNNING:
1271 : : case SNDRV_PCM_STATE_PREPARED:
1272 : : case SNDRV_PCM_STATE_PAUSED:
1273 : : case SNDRV_PCM_STATE_SUSPENDED:
1274 : : return 0;
1275 : : default:
1276 : 0 : return -EBADFD;
1277 : : }
1278 : : }
1279 : :
1280 : 0 : static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1281 : : {
1282 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
1283 : 0 : int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1284 [ # # ]: 0 : if (err < 0)
1285 : : return err;
1286 : 0 : runtime->hw_ptr_base = 0;
1287 : 0 : runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1288 : 0 : runtime->status->hw_ptr % runtime->period_size;
1289 : 0 : runtime->silence_start = runtime->status->hw_ptr;
1290 : 0 : runtime->silence_filled = 0;
1291 : 0 : return 0;
1292 : : }
1293 : :
1294 : 0 : static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1295 : : {
1296 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
1297 : 0 : runtime->control->appl_ptr = runtime->status->hw_ptr;
1298 [ # # ][ # # ]: 0 : if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1299 : 0 : runtime->silence_size > 0)
1300 : 0 : snd_pcm_playback_silence(substream, ULONG_MAX);
1301 : 0 : }
1302 : :
1303 : : static struct action_ops snd_pcm_action_reset = {
1304 : : .pre_action = snd_pcm_pre_reset,
1305 : : .do_action = snd_pcm_do_reset,
1306 : : .post_action = snd_pcm_post_reset
1307 : : };
1308 : :
1309 : : static int snd_pcm_reset(struct snd_pcm_substream *substream)
1310 : : {
1311 : 0 : return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1312 : : }
1313 : :
1314 : : /*
1315 : : * prepare ioctl
1316 : : */
1317 : : /* we use the second argument for updating f_flags */
1318 : 0 : static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1319 : : int f_flags)
1320 : : {
1321 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
1322 [ # # ]: 0 : if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1323 : : runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1324 : : return -EBADFD;
1325 [ # # ]: 0 : if (snd_pcm_running(substream))
1326 : : return -EBUSY;
1327 : 0 : substream->f_flags = f_flags;
1328 : 0 : return 0;
1329 : : }
1330 : :
1331 : 0 : static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1332 : : {
1333 : : int err;
1334 : 0 : err = substream->ops->prepare(substream);
1335 [ # # ]: 0 : if (err < 0)
1336 : : return err;
1337 : 0 : return snd_pcm_do_reset(substream, 0);
1338 : : }
1339 : :
1340 : 0 : static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1341 : : {
1342 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
1343 : 0 : runtime->control->appl_ptr = runtime->status->hw_ptr;
1344 : 0 : snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED);
1345 : 0 : }
1346 : :
1347 : : static struct action_ops snd_pcm_action_prepare = {
1348 : : .pre_action = snd_pcm_pre_prepare,
1349 : : .do_action = snd_pcm_do_prepare,
1350 : : .post_action = snd_pcm_post_prepare
1351 : : };
1352 : :
1353 : : /**
1354 : : * snd_pcm_prepare - prepare the PCM substream to be triggerable
1355 : : * @substream: the PCM substream instance
1356 : : * @file: file to refer f_flags
1357 : : *
1358 : : * Return: Zero if successful, or a negative error code.
1359 : : */
1360 : 0 : static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1361 : : struct file *file)
1362 : : {
1363 : : int res;
1364 : 0 : struct snd_card *card = substream->pcm->card;
1365 : : int f_flags;
1366 : :
1367 [ # # ]: 0 : if (file)
1368 : 0 : f_flags = file->f_flags;
1369 : : else
1370 : 0 : f_flags = substream->f_flags;
1371 : :
1372 : : snd_power_lock(card);
1373 [ # # ]: 0 : if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1374 : 0 : res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1375 : : substream, f_flags);
1376 : : snd_power_unlock(card);
1377 : 0 : return res;
1378 : : }
1379 : :
1380 : : /*
1381 : : * drain ioctl
1382 : : */
1383 : :
1384 : 0 : static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1385 : : {
1386 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
1387 [ # # ][ # # ]: 0 : switch (runtime->status->state) {
1388 : : case SNDRV_PCM_STATE_OPEN:
1389 : : case SNDRV_PCM_STATE_DISCONNECTED:
1390 : : case SNDRV_PCM_STATE_SUSPENDED:
1391 : : return -EBADFD;
1392 : : }
1393 : 0 : runtime->trigger_master = substream;
1394 : 0 : return 0;
1395 : : }
1396 : :
1397 : 0 : static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1398 : : {
1399 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
1400 [ # # ]: 0 : if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1401 [ # # # # ]: 0 : switch (runtime->status->state) {
1402 : : case SNDRV_PCM_STATE_PREPARED:
1403 : : /* start playback stream if possible */
1404 [ # # ]: 0 : if (! snd_pcm_playback_empty(substream)) {
1405 : : snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1406 : 0 : snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1407 : : }
1408 : : break;
1409 : : case SNDRV_PCM_STATE_RUNNING:
1410 : 0 : runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1411 : 0 : break;
1412 : : case SNDRV_PCM_STATE_XRUN:
1413 : 0 : runtime->status->state = SNDRV_PCM_STATE_SETUP;
1414 : 0 : break;
1415 : : default:
1416 : : break;
1417 : : }
1418 : : } else {
1419 : : /* stop running stream */
1420 [ # # ]: 0 : if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1421 : : int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1422 [ # # ]: 0 : SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1423 : 0 : snd_pcm_do_stop(substream, new_state);
1424 : 0 : snd_pcm_post_stop(substream, new_state);
1425 : : }
1426 : : }
1427 : 0 : return 0;
1428 : : }
1429 : :
1430 : 0 : static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1431 : : {
1432 : 0 : }
1433 : :
1434 : : static struct action_ops snd_pcm_action_drain_init = {
1435 : : .pre_action = snd_pcm_pre_drain_init,
1436 : : .do_action = snd_pcm_do_drain_init,
1437 : : .post_action = snd_pcm_post_drain_init
1438 : : };
1439 : :
1440 : : static int snd_pcm_drop(struct snd_pcm_substream *substream);
1441 : :
1442 : : /*
1443 : : * Drain the stream(s).
1444 : : * When the substream is linked, sync until the draining of all playback streams
1445 : : * is finished.
1446 : : * After this call, all streams are supposed to be either SETUP or DRAINING
1447 : : * (capture only) state.
1448 : : */
1449 : 0 : static int snd_pcm_drain(struct snd_pcm_substream *substream,
1450 : : struct file *file)
1451 : : {
1452 : : struct snd_card *card;
1453 : : struct snd_pcm_runtime *runtime;
1454 : : struct snd_pcm_substream *s;
1455 : : wait_queue_t wait;
1456 : : int result = 0;
1457 : : int nonblock = 0;
1458 : :
1459 : 0 : card = substream->pcm->card;
1460 : 0 : runtime = substream->runtime;
1461 : :
1462 [ # # ]: 0 : if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1463 : : return -EBADFD;
1464 : :
1465 : : snd_power_lock(card);
1466 [ # # ]: 0 : if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1467 : 0 : result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1468 [ # # ]: 0 : if (result < 0) {
1469 : : snd_power_unlock(card);
1470 : 0 : return result;
1471 : : }
1472 : : }
1473 : :
1474 [ # # ]: 0 : if (file) {
1475 [ # # ]: 0 : if (file->f_flags & O_NONBLOCK)
1476 : : nonblock = 1;
1477 [ # # ]: 0 : } else if (substream->f_flags & O_NONBLOCK)
1478 : : nonblock = 1;
1479 : :
1480 : 0 : down_read(&snd_pcm_link_rwsem);
1481 : : snd_pcm_stream_lock_irq(substream);
1482 : : /* resume pause */
1483 [ # # ]: 0 : if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1484 : : snd_pcm_pause(substream, 0);
1485 : :
1486 : : /* pre-start/stop - all running streams are changed to DRAINING state */
1487 : 0 : result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1488 [ # # ]: 0 : if (result < 0)
1489 : : goto unlock;
1490 : : /* in non-blocking, we don't wait in ioctl but let caller poll */
1491 [ # # ]: 0 : if (nonblock) {
1492 : : result = -EAGAIN;
1493 : : goto unlock;
1494 : : }
1495 : :
1496 : : for (;;) {
1497 : : long tout;
1498 : : struct snd_pcm_runtime *to_check;
1499 [ # # ]: 0 : if (signal_pending(current)) {
1500 : : result = -ERESTARTSYS;
1501 : : break;
1502 : : }
1503 : : /* find a substream to drain */
1504 : : to_check = NULL;
1505 [ # # ]: 0 : snd_pcm_group_for_each_entry(s, substream) {
1506 [ # # ]: 0 : if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1507 : 0 : continue;
1508 : 0 : runtime = s->runtime;
1509 [ # # ]: 0 : if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1510 : : to_check = runtime;
1511 : : break;
1512 : : }
1513 : : }
1514 [ # # ]: 0 : if (!to_check)
1515 : : break; /* all drained */
1516 : 0 : init_waitqueue_entry(&wait, current);
1517 : 0 : add_wait_queue(&to_check->sleep, &wait);
1518 : : snd_pcm_stream_unlock_irq(substream);
1519 : 0 : up_read(&snd_pcm_link_rwsem);
1520 : : snd_power_unlock(card);
1521 [ # # ]: 0 : if (runtime->no_period_wakeup)
1522 : : tout = MAX_SCHEDULE_TIMEOUT;
1523 : : else {
1524 : : tout = 10;
1525 [ # # ]: 0 : if (runtime->rate) {
1526 : 0 : long t = runtime->period_size * 2 / runtime->rate;
1527 : 0 : tout = max(t, tout);
1528 : : }
1529 : 0 : tout = msecs_to_jiffies(tout * 1000);
1530 : : }
1531 : 0 : tout = schedule_timeout_interruptible(tout);
1532 : : snd_power_lock(card);
1533 : 0 : down_read(&snd_pcm_link_rwsem);
1534 : : snd_pcm_stream_lock_irq(substream);
1535 : 0 : remove_wait_queue(&to_check->sleep, &wait);
1536 [ # # ]: 0 : if (card->shutdown) {
1537 : : result = -ENODEV;
1538 : : break;
1539 : : }
1540 [ # # ]: 0 : if (tout == 0) {
1541 [ # # ]: 0 : if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1542 : : result = -ESTRPIPE;
1543 : : else {
1544 : : snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1545 : : snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1546 : : result = -EIO;
1547 : : }
1548 : : break;
1549 : : }
1550 : : }
1551 : :
1552 : : unlock:
1553 : : snd_pcm_stream_unlock_irq(substream);
1554 : 0 : up_read(&snd_pcm_link_rwsem);
1555 : : snd_power_unlock(card);
1556 : :
1557 : 0 : return result;
1558 : : }
1559 : :
1560 : : /*
1561 : : * drop ioctl
1562 : : *
1563 : : * Immediately put all linked substreams into SETUP state.
1564 : : */
1565 : 0 : static int snd_pcm_drop(struct snd_pcm_substream *substream)
1566 : : {
1567 : : struct snd_pcm_runtime *runtime;
1568 : : int result = 0;
1569 : :
1570 [ # # ][ # # ]: 0 : if (PCM_RUNTIME_CHECK(substream))
[ # # ]
1571 : : return -ENXIO;
1572 : 0 : runtime = substream->runtime;
1573 : :
1574 [ # # ]: 0 : if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1575 [ # # ]: 0 : runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1576 : : runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1577 : : return -EBADFD;
1578 : :
1579 : : snd_pcm_stream_lock_irq(substream);
1580 : : /* resume pause */
1581 [ # # ]: 0 : if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1582 : : snd_pcm_pause(substream, 0);
1583 : :
1584 : : snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1585 : : /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1586 : : snd_pcm_stream_unlock_irq(substream);
1587 : :
1588 : 0 : return result;
1589 : : }
1590 : :
1591 : :
1592 : 0 : static bool is_pcm_file(struct file *file)
1593 : : {
1594 : 0 : struct inode *inode = file_inode(file);
1595 : : unsigned int minor;
1596 : :
1597 [ # # ][ # # ]: 0 : if (!S_ISCHR(inode->i_mode) || imajor(inode) != snd_major)
1598 : : return false;
1599 : : minor = iminor(inode);
1600 [ # # # # ]: 0 : return snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) ||
1601 : 0 : snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE);
1602 : : }
1603 : :
1604 : : /*
1605 : : * PCM link handling
1606 : : */
1607 : 0 : static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1608 : : {
1609 : : int res = 0;
1610 : : struct snd_pcm_file *pcm_file;
1611 : : struct snd_pcm_substream *substream1;
1612 : : struct snd_pcm_group *group;
1613 : 0 : struct fd f = fdget(fd);
1614 : :
1615 [ # # ]: 0 : if (!f.file)
1616 : : return -EBADFD;
1617 [ # # ]: 0 : if (!is_pcm_file(f.file)) {
1618 : : res = -EBADFD;
1619 : : goto _badf;
1620 : : }
1621 : 0 : pcm_file = f.file->private_data;
1622 : 0 : substream1 = pcm_file->substream;
1623 : : group = kmalloc(sizeof(*group), GFP_KERNEL);
1624 [ # # ]: 0 : if (!group) {
1625 : : res = -ENOMEM;
1626 : : goto _nolock;
1627 : : }
1628 : 0 : down_write(&snd_pcm_link_rwsem);
1629 : 0 : write_lock_irq(&snd_pcm_link_rwlock);
1630 [ # # ][ # # ]: 0 : if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1631 : 0 : substream->runtime->status->state != substream1->runtime->status->state) {
1632 : : res = -EBADFD;
1633 : : goto _end;
1634 : : }
1635 [ # # ]: 0 : if (snd_pcm_stream_linked(substream1)) {
1636 : : res = -EALREADY;
1637 : : goto _end;
1638 : : }
1639 [ # # ]: 0 : if (!snd_pcm_stream_linked(substream)) {
1640 : 0 : substream->group = group;
1641 : : group = NULL;
1642 : 0 : spin_lock_init(&substream->group->lock);
1643 : 0 : INIT_LIST_HEAD(&substream->group->substreams);
1644 : 0 : list_add_tail(&substream->link_list, &substream->group->substreams);
1645 : 0 : substream->group->count = 1;
1646 : : }
1647 : 0 : list_add_tail(&substream1->link_list, &substream->group->substreams);
1648 : 0 : substream->group->count++;
1649 : 0 : substream1->group = substream->group;
1650 : : _end:
1651 : : write_unlock_irq(&snd_pcm_link_rwlock);
1652 : 0 : up_write(&snd_pcm_link_rwsem);
1653 : : _nolock:
1654 : 0 : snd_card_unref(substream1->pcm->card);
1655 : 0 : kfree(group);
1656 : : _badf:
1657 : : fdput(f);
1658 : 0 : return res;
1659 : : }
1660 : :
1661 : : static void relink_to_local(struct snd_pcm_substream *substream)
1662 : : {
1663 : 0 : substream->group = &substream->self_group;
1664 : 0 : INIT_LIST_HEAD(&substream->self_group.substreams);
1665 : 0 : list_add_tail(&substream->link_list, &substream->self_group.substreams);
1666 : : }
1667 : :
1668 : 0 : static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1669 : : {
1670 : : struct snd_pcm_substream *s;
1671 : : int res = 0;
1672 : :
1673 : 0 : down_write(&snd_pcm_link_rwsem);
1674 : 0 : write_lock_irq(&snd_pcm_link_rwlock);
1675 [ # # ]: 0 : if (!snd_pcm_stream_linked(substream)) {
1676 : : res = -EALREADY;
1677 : : goto _end;
1678 : : }
1679 : : list_del(&substream->link_list);
1680 : 0 : substream->group->count--;
1681 [ # # ]: 0 : if (substream->group->count == 1) { /* detach the last stream, too */
1682 [ # # ]: 0 : snd_pcm_group_for_each_entry(s, substream) {
1683 : : relink_to_local(s);
1684 : : break;
1685 : : }
1686 : 0 : kfree(substream->group);
1687 : : }
1688 : : relink_to_local(substream);
1689 : : _end:
1690 : : write_unlock_irq(&snd_pcm_link_rwlock);
1691 : 0 : up_write(&snd_pcm_link_rwsem);
1692 : 0 : return res;
1693 : : }
1694 : :
1695 : : /*
1696 : : * hw configurator
1697 : : */
1698 : 0 : static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1699 : : struct snd_pcm_hw_rule *rule)
1700 : : {
1701 : : struct snd_interval t;
1702 : 0 : snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1703 : : hw_param_interval_c(params, rule->deps[1]), &t);
1704 : 0 : return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1705 : : }
1706 : :
1707 : 0 : static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1708 : : struct snd_pcm_hw_rule *rule)
1709 : : {
1710 : : struct snd_interval t;
1711 : 0 : snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1712 : : hw_param_interval_c(params, rule->deps[1]), &t);
1713 : 0 : return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1714 : : }
1715 : :
1716 : 0 : static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1717 : : struct snd_pcm_hw_rule *rule)
1718 : : {
1719 : : struct snd_interval t;
1720 : 0 : snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1721 : : hw_param_interval_c(params, rule->deps[1]),
1722 : 0 : (unsigned long) rule->private, &t);
1723 : 0 : return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1724 : : }
1725 : :
1726 : 0 : static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1727 : : struct snd_pcm_hw_rule *rule)
1728 : : {
1729 : : struct snd_interval t;
1730 : 0 : snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1731 : 0 : (unsigned long) rule->private,
1732 : : hw_param_interval_c(params, rule->deps[1]), &t);
1733 : 0 : return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1734 : : }
1735 : :
1736 : 0 : static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1737 : : struct snd_pcm_hw_rule *rule)
1738 : : {
1739 : : unsigned int k;
1740 : 0 : struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1741 : : struct snd_mask m;
1742 : 0 : struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1743 : : snd_mask_any(&m);
1744 [ # # ]: 0 : for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1745 : : int bits;
1746 [ # # ]: 0 : if (! snd_mask_test(mask, k))
1747 : 0 : continue;
1748 : 0 : bits = snd_pcm_format_physical_width(k);
1749 [ # # ]: 0 : if (bits <= 0)
1750 : 0 : continue; /* ignore invalid formats */
1751 [ # # ][ # # ]: 0 : if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1752 : : snd_mask_reset(&m, k);
1753 : : }
1754 : 0 : return snd_mask_refine(mask, &m);
1755 : : }
1756 : :
1757 : 0 : static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1758 : : struct snd_pcm_hw_rule *rule)
1759 : : {
1760 : : struct snd_interval t;
1761 : : unsigned int k;
1762 : 0 : t.min = UINT_MAX;
1763 : 0 : t.max = 0;
1764 : 0 : t.openmin = 0;
1765 : 0 : t.openmax = 0;
1766 [ # # ]: 0 : for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1767 : : int bits;
1768 [ # # ]: 0 : if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1769 : 0 : continue;
1770 : 0 : bits = snd_pcm_format_physical_width(k);
1771 [ # # ]: 0 : if (bits <= 0)
1772 : 0 : continue; /* ignore invalid formats */
1773 [ # # ]: 0 : if (t.min > (unsigned)bits)
1774 : 0 : t.min = bits;
1775 [ # # ]: 0 : if (t.max < (unsigned)bits)
1776 : 0 : t.max = bits;
1777 : : }
1778 : 0 : t.integer = 1;
1779 : 0 : return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1780 : : }
1781 : :
1782 : : #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1783 : : #error "Change this table"
1784 : : #endif
1785 : :
1786 : : static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1787 : : 48000, 64000, 88200, 96000, 176400, 192000 };
1788 : :
1789 : : const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1790 : : .count = ARRAY_SIZE(rates),
1791 : : .list = rates,
1792 : : };
1793 : :
1794 : 0 : static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1795 : : struct snd_pcm_hw_rule *rule)
1796 : : {
1797 : 0 : struct snd_pcm_hardware *hw = rule->private;
1798 : 0 : return snd_interval_list(hw_param_interval(params, rule->var),
1799 : : snd_pcm_known_rates.count,
1800 : : snd_pcm_known_rates.list, hw->rates);
1801 : : }
1802 : :
1803 : 0 : static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1804 : : struct snd_pcm_hw_rule *rule)
1805 : : {
1806 : : struct snd_interval t;
1807 : 0 : struct snd_pcm_substream *substream = rule->private;
1808 : 0 : t.min = 0;
1809 : 0 : t.max = substream->buffer_bytes_max;
1810 : 0 : t.openmin = 0;
1811 : 0 : t.openmax = 0;
1812 : 0 : t.integer = 1;
1813 : 0 : return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1814 : : }
1815 : :
1816 : 0 : int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1817 : : {
1818 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
1819 : : struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1820 : : int k, err;
1821 : :
1822 [ # # ]: 0 : for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1823 : 0 : snd_mask_any(constrs_mask(constrs, k));
1824 : : }
1825 : :
1826 [ # # ]: 0 : for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1827 : 0 : snd_interval_any(constrs_interval(constrs, k));
1828 : : }
1829 : :
1830 : : snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1831 : : snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1832 : : snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1833 : : snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1834 : : snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1835 : :
1836 : 0 : err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1837 : : snd_pcm_hw_rule_format, NULL,
1838 : : SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1839 [ # # ]: 0 : if (err < 0)
1840 : : return err;
1841 : 0 : err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1842 : : snd_pcm_hw_rule_sample_bits, NULL,
1843 : : SNDRV_PCM_HW_PARAM_FORMAT,
1844 : : SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1845 [ # # ]: 0 : if (err < 0)
1846 : : return err;
1847 : 0 : err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1848 : : snd_pcm_hw_rule_div, NULL,
1849 : : SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1850 [ # # ]: 0 : if (err < 0)
1851 : : return err;
1852 : 0 : err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1853 : : snd_pcm_hw_rule_mul, NULL,
1854 : : SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1855 [ # # ]: 0 : if (err < 0)
1856 : : return err;
1857 : 0 : err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1858 : : snd_pcm_hw_rule_mulkdiv, (void*) 8,
1859 : : SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1860 [ # # ]: 0 : if (err < 0)
1861 : : return err;
1862 : 0 : err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1863 : : snd_pcm_hw_rule_mulkdiv, (void*) 8,
1864 : : SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1865 [ # # ]: 0 : if (err < 0)
1866 : : return err;
1867 : 0 : err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1868 : : snd_pcm_hw_rule_div, NULL,
1869 : : SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1870 [ # # ]: 0 : if (err < 0)
1871 : : return err;
1872 : 0 : err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1873 : : snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1874 : : SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1875 [ # # ]: 0 : if (err < 0)
1876 : : return err;
1877 : 0 : err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1878 : : snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1879 : : SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1880 [ # # ]: 0 : if (err < 0)
1881 : : return err;
1882 : 0 : err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
1883 : : snd_pcm_hw_rule_div, NULL,
1884 : : SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1885 [ # # ]: 0 : if (err < 0)
1886 : : return err;
1887 : 0 : err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1888 : : snd_pcm_hw_rule_div, NULL,
1889 : : SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1890 [ # # ]: 0 : if (err < 0)
1891 : : return err;
1892 : 0 : err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1893 : : snd_pcm_hw_rule_mulkdiv, (void*) 8,
1894 : : SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1895 [ # # ]: 0 : if (err < 0)
1896 : : return err;
1897 : 0 : err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1898 : : snd_pcm_hw_rule_muldivk, (void*) 1000000,
1899 : : SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1900 [ # # ]: 0 : if (err < 0)
1901 : : return err;
1902 : 0 : err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1903 : : snd_pcm_hw_rule_mul, NULL,
1904 : : SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1905 [ # # ]: 0 : if (err < 0)
1906 : : return err;
1907 : 0 : err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1908 : : snd_pcm_hw_rule_mulkdiv, (void*) 8,
1909 : : SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1910 [ # # ]: 0 : if (err < 0)
1911 : : return err;
1912 : 0 : err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1913 : : snd_pcm_hw_rule_muldivk, (void*) 1000000,
1914 : : SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1915 [ # # ]: 0 : if (err < 0)
1916 : : return err;
1917 : 0 : err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1918 : : snd_pcm_hw_rule_muldivk, (void*) 8,
1919 : : SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1920 [ # # ]: 0 : if (err < 0)
1921 : : return err;
1922 : 0 : err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1923 : : snd_pcm_hw_rule_muldivk, (void*) 8,
1924 : : SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1925 [ # # ]: 0 : if (err < 0)
1926 : : return err;
1927 : 0 : err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1928 : : snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1929 : : SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1930 [ # # ]: 0 : if (err < 0)
1931 : : return err;
1932 : 0 : err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
1933 : : snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1934 : : SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1935 [ # # ]: 0 : if (err < 0)
1936 : 0 : return err;
1937 : : return 0;
1938 : : }
1939 : :
1940 : 0 : int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1941 : : {
1942 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
1943 : 0 : struct snd_pcm_hardware *hw = &runtime->hw;
1944 : : int err;
1945 : : unsigned int mask = 0;
1946 : :
1947 [ # # ]: 0 : if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1948 : : mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1949 [ # # ]: 0 : if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1950 : 0 : mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1951 [ # # ]: 0 : if (hw->info & SNDRV_PCM_INFO_MMAP) {
1952 [ # # ]: 0 : if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1953 : 0 : mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1954 [ # # ]: 0 : if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1955 : 0 : mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1956 [ # # ]: 0 : if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1957 : 0 : mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1958 : : }
1959 : 0 : err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
1960 [ # # ]: 0 : if (err < 0)
1961 : : return err;
1962 : :
1963 : 0 : err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
1964 [ # # ]: 0 : if (err < 0)
1965 : : return err;
1966 : :
1967 : 0 : err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
1968 [ # # ]: 0 : if (err < 0)
1969 : : return err;
1970 : :
1971 : 0 : err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1972 : : hw->channels_min, hw->channels_max);
1973 [ # # ]: 0 : if (err < 0)
1974 : : return err;
1975 : :
1976 : 0 : err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1977 : : hw->rate_min, hw->rate_max);
1978 [ # # ]: 0 : if (err < 0)
1979 : : return err;
1980 : :
1981 : 0 : err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1982 : : hw->period_bytes_min, hw->period_bytes_max);
1983 [ # # ]: 0 : if (err < 0)
1984 : : return err;
1985 : :
1986 : 0 : err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1987 : : hw->periods_min, hw->periods_max);
1988 [ # # ]: 0 : if (err < 0)
1989 : : return err;
1990 : :
1991 : 0 : err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1992 : : hw->period_bytes_min, hw->buffer_bytes_max);
1993 [ # # ]: 0 : if (err < 0)
1994 : : return err;
1995 : :
1996 : 0 : err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1997 : : snd_pcm_hw_rule_buffer_bytes_max, substream,
1998 : : SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1999 [ # # ]: 0 : if (err < 0)
2000 : : return err;
2001 : :
2002 : : /* FIXME: remove */
2003 [ # # ]: 0 : if (runtime->dma_bytes) {
2004 : 0 : err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
2005 [ # # ]: 0 : if (err < 0)
2006 : : return err;
2007 : : }
2008 : :
2009 [ # # ]: 0 : if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
2010 : 0 : err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2011 : : snd_pcm_hw_rule_rate, hw,
2012 : : SNDRV_PCM_HW_PARAM_RATE, -1);
2013 [ # # ]: 0 : if (err < 0)
2014 : : return err;
2015 : : }
2016 : :
2017 : : /* FIXME: this belong to lowlevel */
2018 : 0 : snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
2019 : :
2020 : 0 : return 0;
2021 : : }
2022 : :
2023 : 0 : static void pcm_release_private(struct snd_pcm_substream *substream)
2024 : : {
2025 : 0 : snd_pcm_unlink(substream);
2026 : 0 : }
2027 : :
2028 : 0 : void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2029 : : {
2030 : 0 : substream->ref_count--;
2031 [ # # ]: 0 : if (substream->ref_count > 0)
2032 : 0 : return;
2033 : :
2034 : 0 : snd_pcm_drop(substream);
2035 [ # # ]: 0 : if (substream->hw_opened) {
2036 [ # # ]: 0 : if (substream->ops->hw_free != NULL)
2037 : 0 : substream->ops->hw_free(substream);
2038 : 0 : substream->ops->close(substream);
2039 : 0 : substream->hw_opened = 0;
2040 : : }
2041 [ # # ]: 0 : if (pm_qos_request_active(&substream->latency_pm_qos_req))
2042 : 0 : pm_qos_remove_request(&substream->latency_pm_qos_req);
2043 [ # # ]: 0 : if (substream->pcm_release) {
2044 : 0 : substream->pcm_release(substream);
2045 : 0 : substream->pcm_release = NULL;
2046 : : }
2047 : 0 : snd_pcm_detach_substream(substream);
2048 : : }
2049 : :
2050 : : EXPORT_SYMBOL(snd_pcm_release_substream);
2051 : :
2052 : 0 : int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2053 : : struct file *file,
2054 : : struct snd_pcm_substream **rsubstream)
2055 : : {
2056 : : struct snd_pcm_substream *substream;
2057 : : int err;
2058 : :
2059 : 0 : err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2060 [ # # ]: 0 : if (err < 0)
2061 : : return err;
2062 [ # # ]: 0 : if (substream->ref_count > 1) {
2063 : 0 : *rsubstream = substream;
2064 : 0 : return 0;
2065 : : }
2066 : :
2067 : 0 : err = snd_pcm_hw_constraints_init(substream);
2068 [ # # ]: 0 : if (err < 0) {
2069 : : snd_printd("snd_pcm_hw_constraints_init failed\n");
2070 : : goto error;
2071 : : }
2072 : :
2073 [ # # ]: 0 : if ((err = substream->ops->open(substream)) < 0)
2074 : : goto error;
2075 : :
2076 : 0 : substream->hw_opened = 1;
2077 : :
2078 : 0 : err = snd_pcm_hw_constraints_complete(substream);
2079 [ # # ]: 0 : if (err < 0) {
2080 : : snd_printd("snd_pcm_hw_constraints_complete failed\n");
2081 : : goto error;
2082 : : }
2083 : :
2084 : 0 : *rsubstream = substream;
2085 : 0 : return 0;
2086 : :
2087 : : error:
2088 : 0 : snd_pcm_release_substream(substream);
2089 : 0 : return err;
2090 : : }
2091 : :
2092 : : EXPORT_SYMBOL(snd_pcm_open_substream);
2093 : :
2094 : 0 : static int snd_pcm_open_file(struct file *file,
2095 : : struct snd_pcm *pcm,
2096 : : int stream)
2097 : : {
2098 : : struct snd_pcm_file *pcm_file;
2099 : : struct snd_pcm_substream *substream;
2100 : : int err;
2101 : :
2102 : 0 : err = snd_pcm_open_substream(pcm, stream, file, &substream);
2103 [ # # ]: 0 : if (err < 0)
2104 : : return err;
2105 : :
2106 : : pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2107 [ # # ]: 0 : if (pcm_file == NULL) {
2108 : 0 : snd_pcm_release_substream(substream);
2109 : 0 : return -ENOMEM;
2110 : : }
2111 : 0 : pcm_file->substream = substream;
2112 [ # # ]: 0 : if (substream->ref_count == 1) {
2113 : 0 : substream->file = pcm_file;
2114 : 0 : substream->pcm_release = pcm_release_private;
2115 : : }
2116 : 0 : file->private_data = pcm_file;
2117 : :
2118 : 0 : return 0;
2119 : : }
2120 : :
2121 : 0 : static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2122 : : {
2123 : : struct snd_pcm *pcm;
2124 : 0 : int err = nonseekable_open(inode, file);
2125 [ # # ]: 0 : if (err < 0)
2126 : : return err;
2127 : 0 : pcm = snd_lookup_minor_data(iminor(inode),
2128 : : SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2129 : 0 : err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2130 [ # # ]: 0 : if (pcm)
2131 : 0 : snd_card_unref(pcm->card);
2132 : 0 : return err;
2133 : : }
2134 : :
2135 : 0 : static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2136 : : {
2137 : : struct snd_pcm *pcm;
2138 : 0 : int err = nonseekable_open(inode, file);
2139 [ # # ]: 0 : if (err < 0)
2140 : : return err;
2141 : 0 : pcm = snd_lookup_minor_data(iminor(inode),
2142 : : SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2143 : 0 : err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2144 [ # # ]: 0 : if (pcm)
2145 : 0 : snd_card_unref(pcm->card);
2146 : 0 : return err;
2147 : : }
2148 : :
2149 : 0 : static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2150 : : {
2151 : : int err;
2152 : : wait_queue_t wait;
2153 : :
2154 [ # # ]: 0 : if (pcm == NULL) {
2155 : : err = -ENODEV;
2156 : : goto __error1;
2157 : : }
2158 : 0 : err = snd_card_file_add(pcm->card, file);
2159 [ # # ]: 0 : if (err < 0)
2160 : : goto __error1;
2161 [ # # ]: 0 : if (!try_module_get(pcm->card->module)) {
2162 : : err = -EFAULT;
2163 : : goto __error2;
2164 : : }
2165 : 0 : init_waitqueue_entry(&wait, current);
2166 : 0 : add_wait_queue(&pcm->open_wait, &wait);
2167 : 0 : mutex_lock(&pcm->open_mutex);
2168 : : while (1) {
2169 : 0 : err = snd_pcm_open_file(file, pcm, stream);
2170 [ # # ]: 0 : if (err >= 0)
2171 : : break;
2172 [ # # ]: 0 : if (err == -EAGAIN) {
2173 [ # # ]: 0 : if (file->f_flags & O_NONBLOCK) {
2174 : : err = -EBUSY;
2175 : : break;
2176 : : }
2177 : : } else
2178 : : break;
2179 : 0 : set_current_state(TASK_INTERRUPTIBLE);
2180 : 0 : mutex_unlock(&pcm->open_mutex);
2181 : 0 : schedule();
2182 : 0 : mutex_lock(&pcm->open_mutex);
2183 [ # # ]: 0 : if (pcm->card->shutdown) {
2184 : : err = -ENODEV;
2185 : : break;
2186 : : }
2187 [ # # ]: 0 : if (signal_pending(current)) {
2188 : : err = -ERESTARTSYS;
2189 : : break;
2190 : : }
2191 : : }
2192 : 0 : remove_wait_queue(&pcm->open_wait, &wait);
2193 : 0 : mutex_unlock(&pcm->open_mutex);
2194 [ # # ]: 0 : if (err < 0)
2195 : : goto __error;
2196 : : return err;
2197 : :
2198 : : __error:
2199 : 0 : module_put(pcm->card->module);
2200 : : __error2:
2201 : 0 : snd_card_file_remove(pcm->card, file);
2202 : : __error1:
2203 : 0 : return err;
2204 : : }
2205 : :
2206 : 0 : static int snd_pcm_release(struct inode *inode, struct file *file)
2207 : : {
2208 : : struct snd_pcm *pcm;
2209 : : struct snd_pcm_substream *substream;
2210 : : struct snd_pcm_file *pcm_file;
2211 : :
2212 : 0 : pcm_file = file->private_data;
2213 : 0 : substream = pcm_file->substream;
2214 [ # # ]: 0 : if (snd_BUG_ON(!substream))
2215 : : return -ENXIO;
2216 : 0 : pcm = substream->pcm;
2217 : 0 : mutex_lock(&pcm->open_mutex);
2218 : 0 : snd_pcm_release_substream(substream);
2219 : 0 : kfree(pcm_file);
2220 : 0 : mutex_unlock(&pcm->open_mutex);
2221 : 0 : wake_up(&pcm->open_wait);
2222 : 0 : module_put(pcm->card->module);
2223 : 0 : snd_card_file_remove(pcm->card, file);
2224 : 0 : return 0;
2225 : : }
2226 : :
2227 : 0 : static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2228 : : snd_pcm_uframes_t frames)
2229 : : {
2230 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
2231 : : snd_pcm_sframes_t appl_ptr;
2232 : : snd_pcm_sframes_t ret;
2233 : : snd_pcm_sframes_t hw_avail;
2234 : :
2235 [ # # ]: 0 : if (frames == 0)
2236 : : return 0;
2237 : :
2238 : : snd_pcm_stream_lock_irq(substream);
2239 [ # # # # : 0 : switch (runtime->status->state) {
# ]
2240 : : case SNDRV_PCM_STATE_PREPARED:
2241 : : break;
2242 : : case SNDRV_PCM_STATE_DRAINING:
2243 : : case SNDRV_PCM_STATE_RUNNING:
2244 [ # # ]: 0 : if (snd_pcm_update_hw_ptr(substream) >= 0)
2245 : : break;
2246 : : /* Fall through */
2247 : : case SNDRV_PCM_STATE_XRUN:
2248 : : ret = -EPIPE;
2249 : : goto __end;
2250 : : case SNDRV_PCM_STATE_SUSPENDED:
2251 : : ret = -ESTRPIPE;
2252 : : goto __end;
2253 : : default:
2254 : : ret = -EBADFD;
2255 : 0 : goto __end;
2256 : : }
2257 : :
2258 : : hw_avail = snd_pcm_playback_hw_avail(runtime);
2259 [ # # ]: 0 : if (hw_avail <= 0) {
2260 : : ret = 0;
2261 : : goto __end;
2262 : : }
2263 [ # # ]: 0 : if (frames > (snd_pcm_uframes_t)hw_avail)
2264 : : frames = hw_avail;
2265 : 0 : appl_ptr = runtime->control->appl_ptr - frames;
2266 [ # # ]: 0 : if (appl_ptr < 0)
2267 : 0 : appl_ptr += runtime->boundary;
2268 : 0 : runtime->control->appl_ptr = appl_ptr;
2269 : 0 : ret = frames;
2270 : : __end:
2271 : : snd_pcm_stream_unlock_irq(substream);
2272 : 0 : return ret;
2273 : : }
2274 : :
2275 : 0 : static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2276 : : snd_pcm_uframes_t frames)
2277 : : {
2278 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
2279 : : snd_pcm_sframes_t appl_ptr;
2280 : : snd_pcm_sframes_t ret;
2281 : : snd_pcm_sframes_t hw_avail;
2282 : :
2283 [ # # ]: 0 : if (frames == 0)
2284 : : return 0;
2285 : :
2286 : : snd_pcm_stream_lock_irq(substream);
2287 [ # # # # : 0 : switch (runtime->status->state) {
# ]
2288 : : case SNDRV_PCM_STATE_PREPARED:
2289 : : case SNDRV_PCM_STATE_DRAINING:
2290 : : break;
2291 : : case SNDRV_PCM_STATE_RUNNING:
2292 [ # # ]: 0 : if (snd_pcm_update_hw_ptr(substream) >= 0)
2293 : : break;
2294 : : /* Fall through */
2295 : : case SNDRV_PCM_STATE_XRUN:
2296 : : ret = -EPIPE;
2297 : : goto __end;
2298 : : case SNDRV_PCM_STATE_SUSPENDED:
2299 : : ret = -ESTRPIPE;
2300 : : goto __end;
2301 : : default:
2302 : : ret = -EBADFD;
2303 : 0 : goto __end;
2304 : : }
2305 : :
2306 : : hw_avail = snd_pcm_capture_hw_avail(runtime);
2307 [ # # ]: 0 : if (hw_avail <= 0) {
2308 : : ret = 0;
2309 : : goto __end;
2310 : : }
2311 [ # # ]: 0 : if (frames > (snd_pcm_uframes_t)hw_avail)
2312 : : frames = hw_avail;
2313 : 0 : appl_ptr = runtime->control->appl_ptr - frames;
2314 [ # # ]: 0 : if (appl_ptr < 0)
2315 : 0 : appl_ptr += runtime->boundary;
2316 : 0 : runtime->control->appl_ptr = appl_ptr;
2317 : 0 : ret = frames;
2318 : : __end:
2319 : : snd_pcm_stream_unlock_irq(substream);
2320 : 0 : return ret;
2321 : : }
2322 : :
2323 : 0 : static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2324 : : snd_pcm_uframes_t frames)
2325 : : {
2326 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
2327 : : snd_pcm_sframes_t appl_ptr;
2328 : : snd_pcm_sframes_t ret;
2329 : : snd_pcm_sframes_t avail;
2330 : :
2331 [ # # ]: 0 : if (frames == 0)
2332 : : return 0;
2333 : :
2334 : : snd_pcm_stream_lock_irq(substream);
2335 [ # # # # : 0 : switch (runtime->status->state) {
# ]
2336 : : case SNDRV_PCM_STATE_PREPARED:
2337 : : case SNDRV_PCM_STATE_PAUSED:
2338 : : break;
2339 : : case SNDRV_PCM_STATE_DRAINING:
2340 : : case SNDRV_PCM_STATE_RUNNING:
2341 [ # # ]: 0 : if (snd_pcm_update_hw_ptr(substream) >= 0)
2342 : : break;
2343 : : /* Fall through */
2344 : : case SNDRV_PCM_STATE_XRUN:
2345 : : ret = -EPIPE;
2346 : : goto __end;
2347 : : case SNDRV_PCM_STATE_SUSPENDED:
2348 : : ret = -ESTRPIPE;
2349 : : goto __end;
2350 : : default:
2351 : : ret = -EBADFD;
2352 : 0 : goto __end;
2353 : : }
2354 : :
2355 : : avail = snd_pcm_playback_avail(runtime);
2356 [ # # ]: 0 : if (avail <= 0) {
2357 : : ret = 0;
2358 : : goto __end;
2359 : : }
2360 [ # # ]: 0 : if (frames > (snd_pcm_uframes_t)avail)
2361 : : frames = avail;
2362 : 0 : appl_ptr = runtime->control->appl_ptr + frames;
2363 [ # # ]: 0 : if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2364 : 0 : appl_ptr -= runtime->boundary;
2365 : 0 : runtime->control->appl_ptr = appl_ptr;
2366 : 0 : ret = frames;
2367 : : __end:
2368 : : snd_pcm_stream_unlock_irq(substream);
2369 : 0 : return ret;
2370 : : }
2371 : :
2372 : 0 : static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2373 : : snd_pcm_uframes_t frames)
2374 : : {
2375 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
2376 : : snd_pcm_sframes_t appl_ptr;
2377 : : snd_pcm_sframes_t ret;
2378 : : snd_pcm_sframes_t avail;
2379 : :
2380 [ # # ]: 0 : if (frames == 0)
2381 : : return 0;
2382 : :
2383 : : snd_pcm_stream_lock_irq(substream);
2384 [ # # # # : 0 : switch (runtime->status->state) {
# ]
2385 : : case SNDRV_PCM_STATE_PREPARED:
2386 : : case SNDRV_PCM_STATE_DRAINING:
2387 : : case SNDRV_PCM_STATE_PAUSED:
2388 : : break;
2389 : : case SNDRV_PCM_STATE_RUNNING:
2390 [ # # ]: 0 : if (snd_pcm_update_hw_ptr(substream) >= 0)
2391 : : break;
2392 : : /* Fall through */
2393 : : case SNDRV_PCM_STATE_XRUN:
2394 : : ret = -EPIPE;
2395 : : goto __end;
2396 : : case SNDRV_PCM_STATE_SUSPENDED:
2397 : : ret = -ESTRPIPE;
2398 : : goto __end;
2399 : : default:
2400 : : ret = -EBADFD;
2401 : 0 : goto __end;
2402 : : }
2403 : :
2404 : : avail = snd_pcm_capture_avail(runtime);
2405 [ # # ]: 0 : if (avail <= 0) {
2406 : : ret = 0;
2407 : : goto __end;
2408 : : }
2409 [ # # ]: 0 : if (frames > (snd_pcm_uframes_t)avail)
2410 : : frames = avail;
2411 : 0 : appl_ptr = runtime->control->appl_ptr + frames;
2412 [ # # ]: 0 : if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2413 : 0 : appl_ptr -= runtime->boundary;
2414 : 0 : runtime->control->appl_ptr = appl_ptr;
2415 : 0 : ret = frames;
2416 : : __end:
2417 : : snd_pcm_stream_unlock_irq(substream);
2418 : 0 : return ret;
2419 : : }
2420 : :
2421 : 0 : static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2422 : : {
2423 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
2424 : : int err;
2425 : :
2426 : : snd_pcm_stream_lock_irq(substream);
2427 [ # # # # : 0 : switch (runtime->status->state) {
# ]
2428 : : case SNDRV_PCM_STATE_DRAINING:
2429 [ # # ]: 0 : if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2430 : : goto __badfd;
2431 : : /* Fall through */
2432 : : case SNDRV_PCM_STATE_RUNNING:
2433 [ # # ]: 0 : if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2434 : : break;
2435 : : /* Fall through */
2436 : : case SNDRV_PCM_STATE_PREPARED:
2437 : : case SNDRV_PCM_STATE_SUSPENDED:
2438 : : err = 0;
2439 : : break;
2440 : : case SNDRV_PCM_STATE_XRUN:
2441 : : err = -EPIPE;
2442 : : break;
2443 : : default:
2444 : : __badfd:
2445 : : err = -EBADFD;
2446 : 0 : break;
2447 : : }
2448 : : snd_pcm_stream_unlock_irq(substream);
2449 : 0 : return err;
2450 : : }
2451 : :
2452 : 0 : static int snd_pcm_delay(struct snd_pcm_substream *substream,
2453 : : snd_pcm_sframes_t __user *res)
2454 : : {
2455 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
2456 : : int err;
2457 : : snd_pcm_sframes_t n = 0;
2458 : :
2459 : : snd_pcm_stream_lock_irq(substream);
2460 [ # # # # : 0 : switch (runtime->status->state) {
# ]
2461 : : case SNDRV_PCM_STATE_DRAINING:
2462 [ # # ]: 0 : if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2463 : : goto __badfd;
2464 : : /* Fall through */
2465 : : case SNDRV_PCM_STATE_RUNNING:
2466 [ # # ]: 0 : if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2467 : : break;
2468 : : /* Fall through */
2469 : : case SNDRV_PCM_STATE_PREPARED:
2470 : : case SNDRV_PCM_STATE_SUSPENDED:
2471 : : err = 0;
2472 [ # # ]: 0 : if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2473 : : n = snd_pcm_playback_hw_avail(runtime);
2474 : : else
2475 : : n = snd_pcm_capture_avail(runtime);
2476 : 0 : n += runtime->delay;
2477 : 0 : break;
2478 : : case SNDRV_PCM_STATE_XRUN:
2479 : : err = -EPIPE;
2480 : : break;
2481 : : default:
2482 : : __badfd:
2483 : : err = -EBADFD;
2484 : 0 : break;
2485 : : }
2486 : : snd_pcm_stream_unlock_irq(substream);
2487 [ # # ]: 0 : if (!err)
2488 [ # # ]: 0 : if (put_user(n, res))
2489 : : err = -EFAULT;
2490 : 0 : return err;
2491 : : }
2492 : :
2493 : 0 : static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2494 : : struct snd_pcm_sync_ptr __user *_sync_ptr)
2495 : : {
2496 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
2497 : : struct snd_pcm_sync_ptr sync_ptr;
2498 : : volatile struct snd_pcm_mmap_status *status;
2499 : : volatile struct snd_pcm_mmap_control *control;
2500 : : int err;
2501 : :
2502 : 0 : memset(&sync_ptr, 0, sizeof(sync_ptr));
2503 [ # # ]: 0 : if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2504 : : return -EFAULT;
2505 [ # # ]: 0 : if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2506 : : return -EFAULT;
2507 : 0 : status = runtime->status;
2508 : 0 : control = runtime->control;
2509 [ # # ]: 0 : if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2510 : 0 : err = snd_pcm_hwsync(substream);
2511 [ # # ]: 0 : if (err < 0)
2512 : : return err;
2513 : : }
2514 : : snd_pcm_stream_lock_irq(substream);
2515 [ # # ]: 0 : if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2516 : 0 : control->appl_ptr = sync_ptr.c.control.appl_ptr;
2517 : : else
2518 : 0 : sync_ptr.c.control.appl_ptr = control->appl_ptr;
2519 [ # # ]: 0 : if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2520 : 0 : control->avail_min = sync_ptr.c.control.avail_min;
2521 : : else
2522 : 0 : sync_ptr.c.control.avail_min = control->avail_min;
2523 : 0 : sync_ptr.s.status.state = status->state;
2524 : 0 : sync_ptr.s.status.hw_ptr = status->hw_ptr;
2525 : 0 : sync_ptr.s.status.tstamp = status->tstamp;
2526 : 0 : sync_ptr.s.status.suspended_state = status->suspended_state;
2527 : : snd_pcm_stream_unlock_irq(substream);
2528 [ # # ]: 0 : if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2529 : : return -EFAULT;
2530 : 0 : return 0;
2531 : : }
2532 : :
2533 : 0 : static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2534 : : {
2535 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
2536 : : int arg;
2537 : :
2538 [ # # ]: 0 : if (get_user(arg, _arg))
2539 : : return -EFAULT;
2540 [ # # ]: 0 : if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2541 : : return -EINVAL;
2542 : 0 : runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY;
2543 [ # # ]: 0 : if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
2544 : 0 : runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC;
2545 : : return 0;
2546 : : }
2547 : :
2548 : 0 : static int snd_pcm_common_ioctl1(struct file *file,
2549 : 0 : struct snd_pcm_substream *substream,
2550 : : unsigned int cmd, void __user *arg)
2551 : : {
2552 [ # # # # : 0 : switch (cmd) {
# # # # #
# # # # #
# # # # #
# # # # #
# # ]
2553 : : case SNDRV_PCM_IOCTL_PVERSION:
2554 [ # # ]: 0 : return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2555 : : case SNDRV_PCM_IOCTL_INFO:
2556 : 0 : return snd_pcm_info_user(substream, arg);
2557 : : case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
2558 : : return 0;
2559 : : case SNDRV_PCM_IOCTL_TTSTAMP:
2560 : 0 : return snd_pcm_tstamp(substream, arg);
2561 : : case SNDRV_PCM_IOCTL_HW_REFINE:
2562 : 0 : return snd_pcm_hw_refine_user(substream, arg);
2563 : : case SNDRV_PCM_IOCTL_HW_PARAMS:
2564 : 0 : return snd_pcm_hw_params_user(substream, arg);
2565 : : case SNDRV_PCM_IOCTL_HW_FREE:
2566 : 0 : return snd_pcm_hw_free(substream);
2567 : : case SNDRV_PCM_IOCTL_SW_PARAMS:
2568 : 0 : return snd_pcm_sw_params_user(substream, arg);
2569 : : case SNDRV_PCM_IOCTL_STATUS:
2570 : 0 : return snd_pcm_status_user(substream, arg);
2571 : : case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2572 : 0 : return snd_pcm_channel_info_user(substream, arg);
2573 : : case SNDRV_PCM_IOCTL_PREPARE:
2574 : 0 : return snd_pcm_prepare(substream, file);
2575 : : case SNDRV_PCM_IOCTL_RESET:
2576 : 0 : return snd_pcm_reset(substream);
2577 : : case SNDRV_PCM_IOCTL_START:
2578 : 0 : return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2579 : : case SNDRV_PCM_IOCTL_LINK:
2580 : 0 : return snd_pcm_link(substream, (int)(unsigned long) arg);
2581 : : case SNDRV_PCM_IOCTL_UNLINK:
2582 : 0 : return snd_pcm_unlink(substream);
2583 : : case SNDRV_PCM_IOCTL_RESUME:
2584 : 0 : return snd_pcm_resume(substream);
2585 : : case SNDRV_PCM_IOCTL_XRUN:
2586 : 0 : return snd_pcm_xrun(substream);
2587 : : case SNDRV_PCM_IOCTL_HWSYNC:
2588 : 0 : return snd_pcm_hwsync(substream);
2589 : : case SNDRV_PCM_IOCTL_DELAY:
2590 : 0 : return snd_pcm_delay(substream, arg);
2591 : : case SNDRV_PCM_IOCTL_SYNC_PTR:
2592 : 0 : return snd_pcm_sync_ptr(substream, arg);
2593 : : #ifdef CONFIG_SND_SUPPORT_OLD_API
2594 : : case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2595 : 0 : return snd_pcm_hw_refine_old_user(substream, arg);
2596 : : case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2597 : 0 : return snd_pcm_hw_params_old_user(substream, arg);
2598 : : #endif
2599 : : case SNDRV_PCM_IOCTL_DRAIN:
2600 : 0 : return snd_pcm_drain(substream, file);
2601 : : case SNDRV_PCM_IOCTL_DROP:
2602 : 0 : return snd_pcm_drop(substream);
2603 : : case SNDRV_PCM_IOCTL_PAUSE:
2604 : : {
2605 : : int res;
2606 : : snd_pcm_stream_lock_irq(substream);
2607 : 0 : res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2608 : : snd_pcm_stream_unlock_irq(substream);
2609 : 0 : return res;
2610 : : }
2611 : : }
2612 : : snd_printd("unknown ioctl = 0x%x\n", cmd);
2613 : 0 : return -ENOTTY;
2614 : : }
2615 : :
2616 : 0 : static int snd_pcm_playback_ioctl1(struct file *file,
2617 : : struct snd_pcm_substream *substream,
2618 : : unsigned int cmd, void __user *arg)
2619 : : {
2620 [ # # ]: 0 : if (snd_BUG_ON(!substream))
2621 : : return -ENXIO;
2622 [ # # ]: 0 : if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2623 : : return -EINVAL;
2624 [ # # # # : 0 : switch (cmd) {
# ]
2625 : : case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2626 : : {
2627 : : struct snd_xferi xferi;
2628 : : struct snd_xferi __user *_xferi = arg;
2629 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
2630 : : snd_pcm_sframes_t result;
2631 [ # # ]: 0 : if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2632 : : return -EBADFD;
2633 [ # # ]: 0 : if (put_user(0, &_xferi->result))
2634 : : return -EFAULT;
2635 [ # # ]: 0 : if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2636 : : return -EFAULT;
2637 : 0 : result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2638 : 0 : __put_user(result, &_xferi->result);
2639 : 0 : return result < 0 ? result : 0;
2640 : : }
2641 : : case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2642 : : {
2643 : : struct snd_xfern xfern;
2644 : : struct snd_xfern __user *_xfern = arg;
2645 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
2646 : : void __user **bufs;
2647 : : snd_pcm_sframes_t result;
2648 [ # # ]: 0 : if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2649 : : return -EBADFD;
2650 [ # # ]: 0 : if (runtime->channels > 128)
2651 : : return -EINVAL;
2652 [ # # ]: 0 : if (put_user(0, &_xfern->result))
2653 : : return -EFAULT;
2654 [ # # ]: 0 : if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2655 : : return -EFAULT;
2656 : :
2657 : 0 : bufs = memdup_user(xfern.bufs,
2658 : 0 : sizeof(void *) * runtime->channels);
2659 [ # # ]: 0 : if (IS_ERR(bufs))
2660 : 0 : return PTR_ERR(bufs);
2661 : 0 : result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2662 : 0 : kfree(bufs);
2663 : 0 : __put_user(result, &_xfern->result);
2664 : 0 : return result < 0 ? result : 0;
2665 : : }
2666 : : case SNDRV_PCM_IOCTL_REWIND:
2667 : : {
2668 : : snd_pcm_uframes_t frames;
2669 : : snd_pcm_uframes_t __user *_frames = arg;
2670 : : snd_pcm_sframes_t result;
2671 [ # # ]: 0 : if (get_user(frames, _frames))
2672 : : return -EFAULT;
2673 [ # # ]: 0 : if (put_user(0, _frames))
2674 : : return -EFAULT;
2675 : 0 : result = snd_pcm_playback_rewind(substream, frames);
2676 : 0 : __put_user(result, _frames);
2677 : 0 : return result < 0 ? result : 0;
2678 : : }
2679 : : case SNDRV_PCM_IOCTL_FORWARD:
2680 : : {
2681 : : snd_pcm_uframes_t frames;
2682 : : snd_pcm_uframes_t __user *_frames = arg;
2683 : : snd_pcm_sframes_t result;
2684 [ # # ]: 0 : if (get_user(frames, _frames))
2685 : : return -EFAULT;
2686 [ # # ]: 0 : if (put_user(0, _frames))
2687 : : return -EFAULT;
2688 : 0 : result = snd_pcm_playback_forward(substream, frames);
2689 : 0 : __put_user(result, _frames);
2690 : 0 : return result < 0 ? result : 0;
2691 : : }
2692 : : }
2693 : 0 : return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2694 : : }
2695 : :
2696 : 0 : static int snd_pcm_capture_ioctl1(struct file *file,
2697 : : struct snd_pcm_substream *substream,
2698 : : unsigned int cmd, void __user *arg)
2699 : : {
2700 [ # # ]: 0 : if (snd_BUG_ON(!substream))
2701 : : return -ENXIO;
2702 [ # # ]: 0 : if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2703 : : return -EINVAL;
2704 [ # # # # : 0 : switch (cmd) {
# ]
2705 : : case SNDRV_PCM_IOCTL_READI_FRAMES:
2706 : : {
2707 : : struct snd_xferi xferi;
2708 : : struct snd_xferi __user *_xferi = arg;
2709 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
2710 : : snd_pcm_sframes_t result;
2711 [ # # ]: 0 : if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2712 : : return -EBADFD;
2713 [ # # ]: 0 : if (put_user(0, &_xferi->result))
2714 : : return -EFAULT;
2715 [ # # ]: 0 : if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2716 : : return -EFAULT;
2717 : 0 : result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2718 : 0 : __put_user(result, &_xferi->result);
2719 : 0 : return result < 0 ? result : 0;
2720 : : }
2721 : : case SNDRV_PCM_IOCTL_READN_FRAMES:
2722 : : {
2723 : : struct snd_xfern xfern;
2724 : : struct snd_xfern __user *_xfern = arg;
2725 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
2726 : : void *bufs;
2727 : : snd_pcm_sframes_t result;
2728 [ # # ]: 0 : if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2729 : : return -EBADFD;
2730 [ # # ]: 0 : if (runtime->channels > 128)
2731 : : return -EINVAL;
2732 [ # # ]: 0 : if (put_user(0, &_xfern->result))
2733 : : return -EFAULT;
2734 [ # # ]: 0 : if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2735 : : return -EFAULT;
2736 : :
2737 : 0 : bufs = memdup_user(xfern.bufs,
2738 : 0 : sizeof(void *) * runtime->channels);
2739 [ # # ]: 0 : if (IS_ERR(bufs))
2740 : 0 : return PTR_ERR(bufs);
2741 : 0 : result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2742 : 0 : kfree(bufs);
2743 : 0 : __put_user(result, &_xfern->result);
2744 : 0 : return result < 0 ? result : 0;
2745 : : }
2746 : : case SNDRV_PCM_IOCTL_REWIND:
2747 : : {
2748 : : snd_pcm_uframes_t frames;
2749 : : snd_pcm_uframes_t __user *_frames = arg;
2750 : : snd_pcm_sframes_t result;
2751 [ # # ]: 0 : if (get_user(frames, _frames))
2752 : : return -EFAULT;
2753 [ # # ]: 0 : if (put_user(0, _frames))
2754 : : return -EFAULT;
2755 : 0 : result = snd_pcm_capture_rewind(substream, frames);
2756 : 0 : __put_user(result, _frames);
2757 : 0 : return result < 0 ? result : 0;
2758 : : }
2759 : : case SNDRV_PCM_IOCTL_FORWARD:
2760 : : {
2761 : : snd_pcm_uframes_t frames;
2762 : : snd_pcm_uframes_t __user *_frames = arg;
2763 : : snd_pcm_sframes_t result;
2764 [ # # ]: 0 : if (get_user(frames, _frames))
2765 : : return -EFAULT;
2766 [ # # ]: 0 : if (put_user(0, _frames))
2767 : : return -EFAULT;
2768 : 0 : result = snd_pcm_capture_forward(substream, frames);
2769 : 0 : __put_user(result, _frames);
2770 : 0 : return result < 0 ? result : 0;
2771 : : }
2772 : : }
2773 : 0 : return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2774 : : }
2775 : :
2776 : 0 : static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2777 : : unsigned long arg)
2778 : : {
2779 : : struct snd_pcm_file *pcm_file;
2780 : :
2781 : 0 : pcm_file = file->private_data;
2782 : :
2783 [ # # ]: 0 : if (((cmd >> 8) & 0xff) != 'A')
2784 : : return -ENOTTY;
2785 : :
2786 : 0 : return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2787 : : (void __user *)arg);
2788 : : }
2789 : :
2790 : 0 : static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2791 : : unsigned long arg)
2792 : : {
2793 : : struct snd_pcm_file *pcm_file;
2794 : :
2795 : 0 : pcm_file = file->private_data;
2796 : :
2797 [ # # ]: 0 : if (((cmd >> 8) & 0xff) != 'A')
2798 : : return -ENOTTY;
2799 : :
2800 : 0 : return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2801 : : (void __user *)arg);
2802 : : }
2803 : :
2804 : 0 : int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2805 : : unsigned int cmd, void *arg)
2806 : : {
2807 : : mm_segment_t fs;
2808 : : int result;
2809 : :
2810 : : fs = snd_enter_user();
2811 [ # # # ]: 0 : switch (substream->stream) {
2812 : : case SNDRV_PCM_STREAM_PLAYBACK:
2813 : 0 : result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2814 : : (void __user *)arg);
2815 : 0 : break;
2816 : : case SNDRV_PCM_STREAM_CAPTURE:
2817 : 0 : result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2818 : : (void __user *)arg);
2819 : 0 : break;
2820 : : default:
2821 : : result = -EINVAL;
2822 : : break;
2823 : : }
2824 : : snd_leave_user(fs);
2825 : 0 : return result;
2826 : : }
2827 : :
2828 : : EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2829 : :
2830 : 0 : static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2831 : : loff_t * offset)
2832 : : {
2833 : : struct snd_pcm_file *pcm_file;
2834 : : struct snd_pcm_substream *substream;
2835 : 0 : struct snd_pcm_runtime *runtime;
2836 : : snd_pcm_sframes_t result;
2837 : :
2838 : 0 : pcm_file = file->private_data;
2839 : 0 : substream = pcm_file->substream;
2840 [ # # ][ # # ]: 0 : if (PCM_RUNTIME_CHECK(substream))
[ # # ]
2841 : : return -ENXIO;
2842 : 0 : runtime = substream->runtime;
2843 [ # # ]: 0 : if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2844 : : return -EBADFD;
2845 [ # # ]: 0 : if (!frame_aligned(runtime, count))
2846 : : return -EINVAL;
2847 : 0 : count = bytes_to_frames(runtime, count);
2848 : 0 : result = snd_pcm_lib_read(substream, buf, count);
2849 [ # # ]: 0 : if (result > 0)
2850 : : result = frames_to_bytes(runtime, result);
2851 : 0 : return result;
2852 : : }
2853 : :
2854 : 0 : static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2855 : : size_t count, loff_t * offset)
2856 : : {
2857 : : struct snd_pcm_file *pcm_file;
2858 : : struct snd_pcm_substream *substream;
2859 : 0 : struct snd_pcm_runtime *runtime;
2860 : : snd_pcm_sframes_t result;
2861 : :
2862 : 0 : pcm_file = file->private_data;
2863 : 0 : substream = pcm_file->substream;
2864 [ # # ][ # # ]: 0 : if (PCM_RUNTIME_CHECK(substream))
[ # # ]
2865 : : return -ENXIO;
2866 : 0 : runtime = substream->runtime;
2867 [ # # ]: 0 : if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2868 : : return -EBADFD;
2869 [ # # ]: 0 : if (!frame_aligned(runtime, count))
2870 : : return -EINVAL;
2871 : 0 : count = bytes_to_frames(runtime, count);
2872 : 0 : result = snd_pcm_lib_write(substream, buf, count);
2873 [ # # ]: 0 : if (result > 0)
2874 : : result = frames_to_bytes(runtime, result);
2875 : 0 : return result;
2876 : : }
2877 : :
2878 : 0 : static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
2879 : : unsigned long nr_segs, loff_t pos)
2880 : :
2881 : : {
2882 : : struct snd_pcm_file *pcm_file;
2883 : : struct snd_pcm_substream *substream;
2884 : 0 : struct snd_pcm_runtime *runtime;
2885 : : snd_pcm_sframes_t result;
2886 : : unsigned long i;
2887 : : void __user **bufs;
2888 : : snd_pcm_uframes_t frames;
2889 : :
2890 : 0 : pcm_file = iocb->ki_filp->private_data;
2891 : 0 : substream = pcm_file->substream;
2892 [ # # ][ # # ]: 0 : if (PCM_RUNTIME_CHECK(substream))
[ # # ]
2893 : : return -ENXIO;
2894 : 0 : runtime = substream->runtime;
2895 [ # # ]: 0 : if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2896 : : return -EBADFD;
2897 [ # # ][ # # ]: 0 : if (nr_segs > 1024 || nr_segs != runtime->channels)
2898 : : return -EINVAL;
2899 [ # # ]: 0 : if (!frame_aligned(runtime, iov->iov_len))
2900 : : return -EINVAL;
2901 : 0 : frames = bytes_to_samples(runtime, iov->iov_len);
2902 : 0 : bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2903 [ # # ]: 0 : if (bufs == NULL)
2904 : : return -ENOMEM;
2905 [ # # ]: 0 : for (i = 0; i < nr_segs; ++i)
2906 : 0 : bufs[i] = iov[i].iov_base;
2907 : 0 : result = snd_pcm_lib_readv(substream, bufs, frames);
2908 [ # # ]: 0 : if (result > 0)
2909 : : result = frames_to_bytes(runtime, result);
2910 : 0 : kfree(bufs);
2911 : 0 : return result;
2912 : : }
2913 : :
2914 : 0 : static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
2915 : : unsigned long nr_segs, loff_t pos)
2916 : : {
2917 : : struct snd_pcm_file *pcm_file;
2918 : : struct snd_pcm_substream *substream;
2919 : 0 : struct snd_pcm_runtime *runtime;
2920 : : snd_pcm_sframes_t result;
2921 : : unsigned long i;
2922 : : void __user **bufs;
2923 : : snd_pcm_uframes_t frames;
2924 : :
2925 : 0 : pcm_file = iocb->ki_filp->private_data;
2926 : 0 : substream = pcm_file->substream;
2927 [ # # ][ # # ]: 0 : if (PCM_RUNTIME_CHECK(substream))
[ # # ]
2928 : : return -ENXIO;
2929 : 0 : runtime = substream->runtime;
2930 [ # # ]: 0 : if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2931 : : return -EBADFD;
2932 [ # # ][ # # ]: 0 : if (nr_segs > 128 || nr_segs != runtime->channels ||
[ # # ]
2933 : 0 : !frame_aligned(runtime, iov->iov_len))
2934 : : return -EINVAL;
2935 : 0 : frames = bytes_to_samples(runtime, iov->iov_len);
2936 : 0 : bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2937 [ # # ]: 0 : if (bufs == NULL)
2938 : : return -ENOMEM;
2939 [ # # ]: 0 : for (i = 0; i < nr_segs; ++i)
2940 : 0 : bufs[i] = iov[i].iov_base;
2941 : 0 : result = snd_pcm_lib_writev(substream, bufs, frames);
2942 [ # # ]: 0 : if (result > 0)
2943 : : result = frames_to_bytes(runtime, result);
2944 : 0 : kfree(bufs);
2945 : 0 : return result;
2946 : : }
2947 : :
2948 : 0 : static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2949 : : {
2950 : : struct snd_pcm_file *pcm_file;
2951 : : struct snd_pcm_substream *substream;
2952 : : struct snd_pcm_runtime *runtime;
2953 : : unsigned int mask;
2954 : : snd_pcm_uframes_t avail;
2955 : :
2956 : 0 : pcm_file = file->private_data;
2957 : :
2958 : 0 : substream = pcm_file->substream;
2959 [ # # ][ # # ]: 0 : if (PCM_RUNTIME_CHECK(substream))
[ # # ]
2960 : : return -ENXIO;
2961 : 0 : runtime = substream->runtime;
2962 : :
2963 : 0 : poll_wait(file, &runtime->sleep, wait);
2964 : :
2965 : : snd_pcm_stream_lock_irq(substream);
2966 : : avail = snd_pcm_playback_avail(runtime);
2967 [ # # # ]: 0 : switch (runtime->status->state) {
2968 : : case SNDRV_PCM_STATE_RUNNING:
2969 : : case SNDRV_PCM_STATE_PREPARED:
2970 : : case SNDRV_PCM_STATE_PAUSED:
2971 [ # # ]: 0 : if (avail >= runtime->control->avail_min) {
2972 : : mask = POLLOUT | POLLWRNORM;
2973 : : break;
2974 : : }
2975 : : /* Fall through */
2976 : : case SNDRV_PCM_STATE_DRAINING:
2977 : : mask = 0;
2978 : 0 : break;
2979 : : default:
2980 : : mask = POLLOUT | POLLWRNORM | POLLERR;
2981 : : break;
2982 : : }
2983 : : snd_pcm_stream_unlock_irq(substream);
2984 : 0 : return mask;
2985 : : }
2986 : :
2987 : 0 : static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2988 : : {
2989 : : struct snd_pcm_file *pcm_file;
2990 : : struct snd_pcm_substream *substream;
2991 : : struct snd_pcm_runtime *runtime;
2992 : : unsigned int mask;
2993 : : snd_pcm_uframes_t avail;
2994 : :
2995 : 0 : pcm_file = file->private_data;
2996 : :
2997 : 0 : substream = pcm_file->substream;
2998 [ # # ][ # # ]: 0 : if (PCM_RUNTIME_CHECK(substream))
[ # # ]
2999 : : return -ENXIO;
3000 : 0 : runtime = substream->runtime;
3001 : :
3002 : 0 : poll_wait(file, &runtime->sleep, wait);
3003 : :
3004 : : snd_pcm_stream_lock_irq(substream);
3005 : : avail = snd_pcm_capture_avail(runtime);
3006 [ # # # ]: 0 : switch (runtime->status->state) {
3007 : : case SNDRV_PCM_STATE_RUNNING:
3008 : : case SNDRV_PCM_STATE_PREPARED:
3009 : : case SNDRV_PCM_STATE_PAUSED:
3010 [ # # ]: 0 : if (avail >= runtime->control->avail_min) {
3011 : : mask = POLLIN | POLLRDNORM;
3012 : : break;
3013 : : }
3014 : : mask = 0;
3015 : 0 : break;
3016 : : case SNDRV_PCM_STATE_DRAINING:
3017 [ # # ]: 0 : if (avail > 0) {
3018 : : mask = POLLIN | POLLRDNORM;
3019 : : break;
3020 : : }
3021 : : /* Fall through */
3022 : : default:
3023 : : mask = POLLIN | POLLRDNORM | POLLERR;
3024 : 0 : break;
3025 : : }
3026 : : snd_pcm_stream_unlock_irq(substream);
3027 : 0 : return mask;
3028 : : }
3029 : :
3030 : : /*
3031 : : * mmap support
3032 : : */
3033 : :
3034 : : /*
3035 : : * Only on coherent architectures, we can mmap the status and the control records
3036 : : * for effcient data transfer. On others, we have to use HWSYNC ioctl...
3037 : : */
3038 : : #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3039 : : /*
3040 : : * mmap status record
3041 : : */
3042 : : static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
3043 : : struct vm_fault *vmf)
3044 : : {
3045 : : struct snd_pcm_substream *substream = area->vm_private_data;
3046 : : struct snd_pcm_runtime *runtime;
3047 : :
3048 : : if (substream == NULL)
3049 : : return VM_FAULT_SIGBUS;
3050 : : runtime = substream->runtime;
3051 : : vmf->page = virt_to_page(runtime->status);
3052 : : get_page(vmf->page);
3053 : : return 0;
3054 : : }
3055 : :
3056 : : static const struct vm_operations_struct snd_pcm_vm_ops_status =
3057 : : {
3058 : : .fault = snd_pcm_mmap_status_fault,
3059 : : };
3060 : :
3061 : : static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3062 : : struct vm_area_struct *area)
3063 : : {
3064 : : long size;
3065 : : if (!(area->vm_flags & VM_READ))
3066 : : return -EINVAL;
3067 : : size = area->vm_end - area->vm_start;
3068 : : if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3069 : : return -EINVAL;
3070 : : area->vm_ops = &snd_pcm_vm_ops_status;
3071 : : area->vm_private_data = substream;
3072 : : area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3073 : : return 0;
3074 : : }
3075 : :
3076 : : /*
3077 : : * mmap control record
3078 : : */
3079 : : static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3080 : : struct vm_fault *vmf)
3081 : : {
3082 : : struct snd_pcm_substream *substream = area->vm_private_data;
3083 : : struct snd_pcm_runtime *runtime;
3084 : :
3085 : : if (substream == NULL)
3086 : : return VM_FAULT_SIGBUS;
3087 : : runtime = substream->runtime;
3088 : : vmf->page = virt_to_page(runtime->control);
3089 : : get_page(vmf->page);
3090 : : return 0;
3091 : : }
3092 : :
3093 : : static const struct vm_operations_struct snd_pcm_vm_ops_control =
3094 : : {
3095 : : .fault = snd_pcm_mmap_control_fault,
3096 : : };
3097 : :
3098 : : static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3099 : : struct vm_area_struct *area)
3100 : : {
3101 : : long size;
3102 : : if (!(area->vm_flags & VM_READ))
3103 : : return -EINVAL;
3104 : : size = area->vm_end - area->vm_start;
3105 : : if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3106 : : return -EINVAL;
3107 : : area->vm_ops = &snd_pcm_vm_ops_control;
3108 : : area->vm_private_data = substream;
3109 : : area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3110 : : return 0;
3111 : : }
3112 : : #else /* ! coherent mmap */
3113 : : /*
3114 : : * don't support mmap for status and control records.
3115 : : */
3116 : : static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3117 : : struct vm_area_struct *area)
3118 : : {
3119 : : return -ENXIO;
3120 : : }
3121 : : static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3122 : : struct vm_area_struct *area)
3123 : : {
3124 : : return -ENXIO;
3125 : : }
3126 : : #endif /* coherent mmap */
3127 : :
3128 : : static inline struct page *
3129 : : snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3130 : : {
3131 : 0 : void *vaddr = substream->runtime->dma_area + ofs;
3132 : : #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3133 : : if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3134 : : return virt_to_page(CAC_ADDR(vaddr));
3135 : : #endif
3136 : : #if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE)
3137 : : if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) {
3138 : : dma_addr_t addr = substream->runtime->dma_addr + ofs;
3139 : : addr -= get_dma_offset(substream->dma_buffer.dev.dev);
3140 : : /* assume dma_handle set via pfn_to_phys() in
3141 : : * mm/dma-noncoherent.c
3142 : : */
3143 : : return pfn_to_page(addr >> PAGE_SHIFT);
3144 : : }
3145 : : #endif
3146 : 0 : return virt_to_page(vaddr);
3147 : : }
3148 : :
3149 : : /*
3150 : : * fault callback for mmapping a RAM page
3151 : : */
3152 : 0 : static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3153 : : struct vm_fault *vmf)
3154 : : {
3155 : 0 : struct snd_pcm_substream *substream = area->vm_private_data;
3156 : : struct snd_pcm_runtime *runtime;
3157 : : unsigned long offset;
3158 : : struct page * page;
3159 : : size_t dma_bytes;
3160 : :
3161 [ # # ]: 0 : if (substream == NULL)
3162 : : return VM_FAULT_SIGBUS;
3163 : 0 : runtime = substream->runtime;
3164 : 0 : offset = vmf->pgoff << PAGE_SHIFT;
3165 : 0 : dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3166 [ # # ]: 0 : if (offset > dma_bytes - PAGE_SIZE)
3167 : : return VM_FAULT_SIGBUS;
3168 [ # # ]: 0 : if (substream->ops->page)
3169 : 0 : page = substream->ops->page(substream, offset);
3170 : : else
3171 : : page = snd_pcm_default_page_ops(substream, offset);
3172 [ # # ]: 0 : if (!page)
3173 : : return VM_FAULT_SIGBUS;
3174 : : get_page(page);
3175 : 0 : vmf->page = page;
3176 : 0 : return 0;
3177 : : }
3178 : :
3179 : : static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3180 : : .open = snd_pcm_mmap_data_open,
3181 : : .close = snd_pcm_mmap_data_close,
3182 : : };
3183 : :
3184 : : static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
3185 : : .open = snd_pcm_mmap_data_open,
3186 : : .close = snd_pcm_mmap_data_close,
3187 : : .fault = snd_pcm_mmap_data_fault,
3188 : : };
3189 : :
3190 : : #ifndef ARCH_HAS_DMA_MMAP_COHERENT
3191 : : /* This should be defined / handled globally! */
3192 : : #ifdef CONFIG_ARM
3193 : : #define ARCH_HAS_DMA_MMAP_COHERENT
3194 : : #endif
3195 : : #endif
3196 : :
3197 : : /*
3198 : : * mmap the DMA buffer on RAM
3199 : : */
3200 : 0 : int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
3201 : : struct vm_area_struct *area)
3202 : : {
3203 : 0 : area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3204 : : #ifdef CONFIG_GENERIC_ALLOCATOR
3205 : : if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_IRAM) {
3206 : : area->vm_page_prot = pgprot_writecombine(area->vm_page_prot);
3207 : : return remap_pfn_range(area, area->vm_start,
3208 : : substream->dma_buffer.addr >> PAGE_SHIFT,
3209 : : area->vm_end - area->vm_start, area->vm_page_prot);
3210 : : }
3211 : : #endif /* CONFIG_GENERIC_ALLOCATOR */
3212 : : #ifdef ARCH_HAS_DMA_MMAP_COHERENT
3213 [ # # ][ # # ]: 0 : if (!substream->ops->page &&
3214 : 0 : substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3215 : 0 : return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3216 : : area,
3217 : : substream->runtime->dma_area,
3218 : : substream->runtime->dma_addr,
3219 : : area->vm_end - area->vm_start);
3220 : : #elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3221 : : if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV &&
3222 : : !plat_device_is_coherent(substream->dma_buffer.dev.dev))
3223 : : area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3224 : : #endif /* ARCH_HAS_DMA_MMAP_COHERENT */
3225 : : /* mmap with fault handler */
3226 : 0 : area->vm_ops = &snd_pcm_vm_ops_data_fault;
3227 : 0 : return 0;
3228 : : }
3229 : : EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap);
3230 : :
3231 : : /*
3232 : : * mmap the DMA buffer on I/O memory area
3233 : : */
3234 : : #if SNDRV_PCM_INFO_MMAP_IOMEM
3235 : : int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3236 : : struct vm_area_struct *area)
3237 : : {
3238 : : struct snd_pcm_runtime *runtime = substream->runtime;;
3239 : :
3240 : : area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3241 : : return vm_iomap_memory(area, runtime->dma_addr, runtime->dma_bytes);
3242 : : }
3243 : :
3244 : : EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3245 : : #endif /* SNDRV_PCM_INFO_MMAP */
3246 : :
3247 : : /*
3248 : : * mmap DMA buffer
3249 : : */
3250 : 0 : int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3251 : : struct vm_area_struct *area)
3252 : : {
3253 : : struct snd_pcm_runtime *runtime;
3254 : : long size;
3255 : : unsigned long offset;
3256 : : size_t dma_bytes;
3257 : : int err;
3258 : :
3259 [ # # ]: 0 : if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3260 [ # # ]: 0 : if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3261 : : return -EINVAL;
3262 : : } else {
3263 [ # # ]: 0 : if (!(area->vm_flags & VM_READ))
3264 : : return -EINVAL;
3265 : : }
3266 : 0 : runtime = substream->runtime;
3267 [ # # ]: 0 : if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3268 : : return -EBADFD;
3269 [ # # ]: 0 : if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3270 : : return -ENXIO;
3271 [ # # ]: 0 : if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3272 : : runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3273 : : return -EINVAL;
3274 : 0 : size = area->vm_end - area->vm_start;
3275 : 0 : offset = area->vm_pgoff << PAGE_SHIFT;
3276 : 0 : dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3277 [ # # ]: 0 : if ((size_t)size > dma_bytes)
3278 : : return -EINVAL;
3279 [ # # ]: 0 : if (offset > dma_bytes - size)
3280 : : return -EINVAL;
3281 : :
3282 : 0 : area->vm_ops = &snd_pcm_vm_ops_data;
3283 : 0 : area->vm_private_data = substream;
3284 [ # # ]: 0 : if (substream->ops->mmap)
3285 : 0 : err = substream->ops->mmap(substream, area);
3286 : : else
3287 : 0 : err = snd_pcm_lib_default_mmap(substream, area);
3288 [ # # ]: 0 : if (!err)
3289 : 0 : atomic_inc(&substream->mmap_count);
3290 : 0 : return err;
3291 : : }
3292 : :
3293 : : EXPORT_SYMBOL(snd_pcm_mmap_data);
3294 : :
3295 : 0 : static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3296 : : {
3297 : : struct snd_pcm_file * pcm_file;
3298 : : struct snd_pcm_substream *substream;
3299 : : unsigned long offset;
3300 : :
3301 : 0 : pcm_file = file->private_data;
3302 : 0 : substream = pcm_file->substream;
3303 [ # # ][ # # ]: 0 : if (PCM_RUNTIME_CHECK(substream))
[ # # ]
3304 : : return -ENXIO;
3305 : :
3306 : 0 : offset = area->vm_pgoff << PAGE_SHIFT;
3307 [ # # ]: 0 : switch (offset) {
3308 : : case SNDRV_PCM_MMAP_OFFSET_STATUS:
3309 : : if (pcm_file->no_compat_mmap)
3310 : : return -ENXIO;
3311 : : return snd_pcm_mmap_status(substream, file, area);
3312 : : case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3313 : : if (pcm_file->no_compat_mmap)
3314 : : return -ENXIO;
3315 : : return snd_pcm_mmap_control(substream, file, area);
3316 : : default:
3317 : 0 : return snd_pcm_mmap_data(substream, file, area);
3318 : : }
3319 : : return 0;
3320 : : }
3321 : :
3322 : 0 : static int snd_pcm_fasync(int fd, struct file * file, int on)
3323 : : {
3324 : : struct snd_pcm_file * pcm_file;
3325 : : struct snd_pcm_substream *substream;
3326 : : struct snd_pcm_runtime *runtime;
3327 : :
3328 : 0 : pcm_file = file->private_data;
3329 : 0 : substream = pcm_file->substream;
3330 [ # # ][ # # ]: 0 : if (PCM_RUNTIME_CHECK(substream))
[ # # ]
3331 : : return -ENXIO;
3332 : 0 : runtime = substream->runtime;
3333 : 0 : return fasync_helper(fd, file, on, &runtime->fasync);
3334 : : }
3335 : :
3336 : : /*
3337 : : * ioctl32 compat
3338 : : */
3339 : : #ifdef CONFIG_COMPAT
3340 : : #include "pcm_compat.c"
3341 : : #else
3342 : : #define snd_pcm_ioctl_compat NULL
3343 : : #endif
3344 : :
3345 : : /*
3346 : : * To be removed helpers to keep binary compatibility
3347 : : */
3348 : :
3349 : : #ifdef CONFIG_SND_SUPPORT_OLD_API
3350 : : #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3351 : : #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3352 : :
3353 : 0 : static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3354 : : struct snd_pcm_hw_params_old *oparams)
3355 : : {
3356 : : unsigned int i;
3357 : :
3358 : 0 : memset(params, 0, sizeof(*params));
3359 : 0 : params->flags = oparams->flags;
3360 [ # # ]: 0 : for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3361 : 0 : params->masks[i].bits[0] = oparams->masks[i];
3362 : 0 : memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3363 : 0 : params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3364 : 0 : params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3365 : 0 : params->info = oparams->info;
3366 : 0 : params->msbits = oparams->msbits;
3367 : 0 : params->rate_num = oparams->rate_num;
3368 : 0 : params->rate_den = oparams->rate_den;
3369 : 0 : params->fifo_size = oparams->fifo_size;
3370 : 0 : }
3371 : :
3372 : 0 : static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3373 : : struct snd_pcm_hw_params *params)
3374 : : {
3375 : : unsigned int i;
3376 : :
3377 : 0 : memset(oparams, 0, sizeof(*oparams));
3378 : 0 : oparams->flags = params->flags;
3379 [ # # ]: 0 : for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3380 : 0 : oparams->masks[i] = params->masks[i].bits[0];
3381 : 0 : memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3382 : 0 : oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3383 : 0 : oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3384 : 0 : oparams->info = params->info;
3385 : 0 : oparams->msbits = params->msbits;
3386 : 0 : oparams->rate_num = params->rate_num;
3387 : 0 : oparams->rate_den = params->rate_den;
3388 : 0 : oparams->fifo_size = params->fifo_size;
3389 : 0 : }
3390 : :
3391 : 0 : static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3392 : : struct snd_pcm_hw_params_old __user * _oparams)
3393 : : {
3394 : : struct snd_pcm_hw_params *params;
3395 : : struct snd_pcm_hw_params_old *oparams = NULL;
3396 : : int err;
3397 : :
3398 : : params = kmalloc(sizeof(*params), GFP_KERNEL);
3399 [ # # ]: 0 : if (!params)
3400 : : return -ENOMEM;
3401 : :
3402 : 0 : oparams = memdup_user(_oparams, sizeof(*oparams));
3403 [ # # ]: 0 : if (IS_ERR(oparams)) {
3404 : : err = PTR_ERR(oparams);
3405 : 0 : goto out;
3406 : : }
3407 : 0 : snd_pcm_hw_convert_from_old_params(params, oparams);
3408 : 0 : err = snd_pcm_hw_refine(substream, params);
3409 : 0 : snd_pcm_hw_convert_to_old_params(oparams, params);
3410 [ # # ]: 0 : if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3411 [ # # ]: 0 : if (!err)
3412 : : err = -EFAULT;
3413 : : }
3414 : :
3415 : 0 : kfree(oparams);
3416 : : out:
3417 : 0 : kfree(params);
3418 : 0 : return err;
3419 : : }
3420 : :
3421 : 0 : static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3422 : : struct snd_pcm_hw_params_old __user * _oparams)
3423 : : {
3424 : : struct snd_pcm_hw_params *params;
3425 : : struct snd_pcm_hw_params_old *oparams = NULL;
3426 : : int err;
3427 : :
3428 : : params = kmalloc(sizeof(*params), GFP_KERNEL);
3429 [ # # ]: 0 : if (!params)
3430 : : return -ENOMEM;
3431 : :
3432 : 0 : oparams = memdup_user(_oparams, sizeof(*oparams));
3433 [ # # ]: 0 : if (IS_ERR(oparams)) {
3434 : : err = PTR_ERR(oparams);
3435 : 0 : goto out;
3436 : : }
3437 : 0 : snd_pcm_hw_convert_from_old_params(params, oparams);
3438 : 0 : err = snd_pcm_hw_params(substream, params);
3439 : 0 : snd_pcm_hw_convert_to_old_params(oparams, params);
3440 [ # # ]: 0 : if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3441 [ # # ]: 0 : if (!err)
3442 : : err = -EFAULT;
3443 : : }
3444 : :
3445 : 0 : kfree(oparams);
3446 : : out:
3447 : 0 : kfree(params);
3448 : 0 : return err;
3449 : : }
3450 : : #endif /* CONFIG_SND_SUPPORT_OLD_API */
3451 : :
3452 : : #ifndef CONFIG_MMU
3453 : : static unsigned long snd_pcm_get_unmapped_area(struct file *file,
3454 : : unsigned long addr,
3455 : : unsigned long len,
3456 : : unsigned long pgoff,
3457 : : unsigned long flags)
3458 : : {
3459 : : struct snd_pcm_file *pcm_file = file->private_data;
3460 : : struct snd_pcm_substream *substream = pcm_file->substream;
3461 : : struct snd_pcm_runtime *runtime = substream->runtime;
3462 : : unsigned long offset = pgoff << PAGE_SHIFT;
3463 : :
3464 : : switch (offset) {
3465 : : case SNDRV_PCM_MMAP_OFFSET_STATUS:
3466 : : return (unsigned long)runtime->status;
3467 : : case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3468 : : return (unsigned long)runtime->control;
3469 : : default:
3470 : : return (unsigned long)runtime->dma_area + offset;
3471 : : }
3472 : : }
3473 : : #else
3474 : : # define snd_pcm_get_unmapped_area NULL
3475 : : #endif
3476 : :
3477 : : /*
3478 : : * Register section
3479 : : */
3480 : :
3481 : : const struct file_operations snd_pcm_f_ops[2] = {
3482 : : {
3483 : : .owner = THIS_MODULE,
3484 : : .write = snd_pcm_write,
3485 : : .aio_write = snd_pcm_aio_write,
3486 : : .open = snd_pcm_playback_open,
3487 : : .release = snd_pcm_release,
3488 : : .llseek = no_llseek,
3489 : : .poll = snd_pcm_playback_poll,
3490 : : .unlocked_ioctl = snd_pcm_playback_ioctl,
3491 : : .compat_ioctl = snd_pcm_ioctl_compat,
3492 : : .mmap = snd_pcm_mmap,
3493 : : .fasync = snd_pcm_fasync,
3494 : : .get_unmapped_area = snd_pcm_get_unmapped_area,
3495 : : },
3496 : : {
3497 : : .owner = THIS_MODULE,
3498 : : .read = snd_pcm_read,
3499 : : .aio_read = snd_pcm_aio_read,
3500 : : .open = snd_pcm_capture_open,
3501 : : .release = snd_pcm_release,
3502 : : .llseek = no_llseek,
3503 : : .poll = snd_pcm_capture_poll,
3504 : : .unlocked_ioctl = snd_pcm_capture_ioctl,
3505 : : .compat_ioctl = snd_pcm_ioctl_compat,
3506 : : .mmap = snd_pcm_mmap,
3507 : : .fasync = snd_pcm_fasync,
3508 : : .get_unmapped_area = snd_pcm_get_unmapped_area,
3509 : : }
3510 : : };
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