Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Digital Audio (PCM) abstract layer | |
c1017a4c | 3 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
1da177e4 LT |
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 | ||
1da177e4 | 22 | #include <linux/mm.h> |
da155d5b | 23 | #include <linux/module.h> |
1da177e4 LT |
24 | #include <linux/file.h> |
25 | #include <linux/slab.h> | |
174cd4b1 | 26 | #include <linux/sched/signal.h> |
1da177e4 | 27 | #include <linux/time.h> |
e8db0be1 | 28 | #include <linux/pm_qos.h> |
6cbbfe1c | 29 | #include <linux/io.h> |
657b1989 | 30 | #include <linux/dma-mapping.h> |
1da177e4 LT |
31 | #include <sound/core.h> |
32 | #include <sound/control.h> | |
33 | #include <sound/info.h> | |
34 | #include <sound/pcm.h> | |
35 | #include <sound/pcm_params.h> | |
36 | #include <sound/timer.h> | |
37 | #include <sound/minors.h> | |
e2e40f2c | 38 | #include <linux/uio.h> |
1da177e4 | 39 | |
2c4842d3 TS |
40 | #include "pcm_local.h" |
41 | ||
be4e31da TS |
42 | #define CREATE_TRACE_POINTS |
43 | #include "pcm_param_trace.h" | |
44 | ||
1da177e4 LT |
45 | /* |
46 | * Compatibility | |
47 | */ | |
48 | ||
877211f5 | 49 | struct snd_pcm_hw_params_old { |
1da177e4 LT |
50 | unsigned int flags; |
51 | unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT - | |
52 | SNDRV_PCM_HW_PARAM_ACCESS + 1]; | |
877211f5 | 53 | struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME - |
1da177e4 LT |
54 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1]; |
55 | unsigned int rmask; | |
56 | unsigned int cmask; | |
57 | unsigned int info; | |
58 | unsigned int msbits; | |
59 | unsigned int rate_num; | |
60 | unsigned int rate_den; | |
877211f5 | 61 | snd_pcm_uframes_t fifo_size; |
1da177e4 LT |
62 | unsigned char reserved[64]; |
63 | }; | |
64 | ||
59d48582 | 65 | #ifdef CONFIG_SND_SUPPORT_OLD_API |
877211f5 TI |
66 | #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old) |
67 | #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old) | |
1da177e4 | 68 | |
877211f5 TI |
69 | static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, |
70 | struct snd_pcm_hw_params_old __user * _oparams); | |
71 | static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, | |
72 | struct snd_pcm_hw_params_old __user * _oparams); | |
59d48582 | 73 | #endif |
f87135f5 | 74 | static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream); |
1da177e4 LT |
75 | |
76 | /* | |
77 | * | |
78 | */ | |
79 | ||
7af142f7 TI |
80 | static DEFINE_RWLOCK(snd_pcm_link_rwlock); |
81 | static DECLARE_RWSEM(snd_pcm_link_rwsem); | |
1da177e4 | 82 | |
67ec1072 TI |
83 | /* Writer in rwsem may block readers even during its waiting in queue, |
84 | * and this may lead to a deadlock when the code path takes read sem | |
85 | * twice (e.g. one in snd_pcm_action_nonatomic() and another in | |
86 | * snd_pcm_stream_lock()). As a (suboptimal) workaround, let writer to | |
87 | * spin until it gets the lock. | |
88 | */ | |
89 | static inline void down_write_nonblock(struct rw_semaphore *lock) | |
90 | { | |
91 | while (!down_write_trylock(lock)) | |
92 | cond_resched(); | |
93 | } | |
94 | ||
30b771cf TI |
95 | /** |
96 | * snd_pcm_stream_lock - Lock the PCM stream | |
97 | * @substream: PCM substream | |
98 | * | |
99 | * This locks the PCM stream's spinlock or mutex depending on the nonatomic | |
100 | * flag of the given substream. This also takes the global link rw lock | |
101 | * (or rw sem), too, for avoiding the race with linked streams. | |
102 | */ | |
7af142f7 TI |
103 | void snd_pcm_stream_lock(struct snd_pcm_substream *substream) |
104 | { | |
105 | if (substream->pcm->nonatomic) { | |
67756e31 | 106 | down_read_nested(&snd_pcm_link_rwsem, SINGLE_DEPTH_NESTING); |
7af142f7 TI |
107 | mutex_lock(&substream->self_group.mutex); |
108 | } else { | |
109 | read_lock(&snd_pcm_link_rwlock); | |
110 | spin_lock(&substream->self_group.lock); | |
111 | } | |
112 | } | |
113 | EXPORT_SYMBOL_GPL(snd_pcm_stream_lock); | |
114 | ||
30b771cf TI |
115 | /** |
116 | * snd_pcm_stream_lock - Unlock the PCM stream | |
117 | * @substream: PCM substream | |
118 | * | |
119 | * This unlocks the PCM stream that has been locked via snd_pcm_stream_lock(). | |
120 | */ | |
7af142f7 TI |
121 | void snd_pcm_stream_unlock(struct snd_pcm_substream *substream) |
122 | { | |
123 | if (substream->pcm->nonatomic) { | |
124 | mutex_unlock(&substream->self_group.mutex); | |
125 | up_read(&snd_pcm_link_rwsem); | |
126 | } else { | |
127 | spin_unlock(&substream->self_group.lock); | |
128 | read_unlock(&snd_pcm_link_rwlock); | |
129 | } | |
130 | } | |
131 | EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock); | |
132 | ||
30b771cf TI |
133 | /** |
134 | * snd_pcm_stream_lock_irq - Lock the PCM stream | |
135 | * @substream: PCM substream | |
136 | * | |
137 | * This locks the PCM stream like snd_pcm_stream_lock() and disables the local | |
138 | * IRQ (only when nonatomic is false). In nonatomic case, this is identical | |
139 | * as snd_pcm_stream_lock(). | |
140 | */ | |
7af142f7 TI |
141 | void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream) |
142 | { | |
143 | if (!substream->pcm->nonatomic) | |
144 | local_irq_disable(); | |
145 | snd_pcm_stream_lock(substream); | |
146 | } | |
147 | EXPORT_SYMBOL_GPL(snd_pcm_stream_lock_irq); | |
148 | ||
30b771cf TI |
149 | /** |
150 | * snd_pcm_stream_unlock_irq - Unlock the PCM stream | |
151 | * @substream: PCM substream | |
152 | * | |
153 | * This is a counter-part of snd_pcm_stream_lock_irq(). | |
154 | */ | |
7af142f7 TI |
155 | void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream) |
156 | { | |
157 | snd_pcm_stream_unlock(substream); | |
158 | if (!substream->pcm->nonatomic) | |
159 | local_irq_enable(); | |
160 | } | |
161 | EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irq); | |
162 | ||
163 | unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream) | |
164 | { | |
165 | unsigned long flags = 0; | |
166 | if (!substream->pcm->nonatomic) | |
167 | local_irq_save(flags); | |
168 | snd_pcm_stream_lock(substream); | |
169 | return flags; | |
170 | } | |
171 | EXPORT_SYMBOL_GPL(_snd_pcm_stream_lock_irqsave); | |
172 | ||
30b771cf TI |
173 | /** |
174 | * snd_pcm_stream_unlock_irqrestore - Unlock the PCM stream | |
175 | * @substream: PCM substream | |
176 | * @flags: irq flags | |
177 | * | |
178 | * This is a counter-part of snd_pcm_stream_lock_irqsave(). | |
179 | */ | |
7af142f7 TI |
180 | void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream, |
181 | unsigned long flags) | |
182 | { | |
183 | snd_pcm_stream_unlock(substream); | |
184 | if (!substream->pcm->nonatomic) | |
185 | local_irq_restore(flags); | |
186 | } | |
187 | EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irqrestore); | |
1da177e4 | 188 | |
877211f5 | 189 | int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info) |
1da177e4 | 190 | { |
877211f5 TI |
191 | struct snd_pcm_runtime *runtime; |
192 | struct snd_pcm *pcm = substream->pcm; | |
193 | struct snd_pcm_str *pstr = substream->pstr; | |
1da177e4 | 194 | |
1da177e4 LT |
195 | memset(info, 0, sizeof(*info)); |
196 | info->card = pcm->card->number; | |
197 | info->device = pcm->device; | |
198 | info->stream = substream->stream; | |
199 | info->subdevice = substream->number; | |
200 | strlcpy(info->id, pcm->id, sizeof(info->id)); | |
201 | strlcpy(info->name, pcm->name, sizeof(info->name)); | |
202 | info->dev_class = pcm->dev_class; | |
203 | info->dev_subclass = pcm->dev_subclass; | |
204 | info->subdevices_count = pstr->substream_count; | |
205 | info->subdevices_avail = pstr->substream_count - pstr->substream_opened; | |
206 | strlcpy(info->subname, substream->name, sizeof(info->subname)); | |
207 | runtime = substream->runtime; | |
208 | /* AB: FIXME!!! This is definitely nonsense */ | |
209 | if (runtime) { | |
210 | info->sync = runtime->sync; | |
211 | substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info); | |
212 | } | |
213 | return 0; | |
214 | } | |
215 | ||
877211f5 TI |
216 | int snd_pcm_info_user(struct snd_pcm_substream *substream, |
217 | struct snd_pcm_info __user * _info) | |
1da177e4 | 218 | { |
877211f5 | 219 | struct snd_pcm_info *info; |
1da177e4 LT |
220 | int err; |
221 | ||
222 | info = kmalloc(sizeof(*info), GFP_KERNEL); | |
223 | if (! info) | |
224 | return -ENOMEM; | |
225 | err = snd_pcm_info(substream, info); | |
226 | if (err >= 0) { | |
227 | if (copy_to_user(_info, info, sizeof(*info))) | |
228 | err = -EFAULT; | |
229 | } | |
230 | kfree(info); | |
231 | return err; | |
232 | } | |
233 | ||
63825f3a TI |
234 | static bool hw_support_mmap(struct snd_pcm_substream *substream) |
235 | { | |
236 | if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_MMAP)) | |
237 | return false; | |
238 | /* check architectures that return -EINVAL from dma_mmap_coherent() */ | |
239 | /* FIXME: this should be some global flag */ | |
240 | #if defined(CONFIG_C6X) || defined(CONFIG_FRV) || defined(CONFIG_MN10300) ||\ | |
241 | defined(CONFIG_PARISC) || defined(CONFIG_XTENSA) | |
242 | if (!substream->ops->mmap && | |
243 | substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) | |
244 | return false; | |
245 | #endif | |
246 | return true; | |
247 | } | |
248 | ||
1da177e4 LT |
249 | #undef RULES_DEBUG |
250 | ||
251 | #ifdef RULES_DEBUG | |
252 | #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v | |
47023ec7 | 253 | static const char * const snd_pcm_hw_param_names[] = { |
1da177e4 LT |
254 | HW_PARAM(ACCESS), |
255 | HW_PARAM(FORMAT), | |
256 | HW_PARAM(SUBFORMAT), | |
257 | HW_PARAM(SAMPLE_BITS), | |
258 | HW_PARAM(FRAME_BITS), | |
259 | HW_PARAM(CHANNELS), | |
260 | HW_PARAM(RATE), | |
261 | HW_PARAM(PERIOD_TIME), | |
262 | HW_PARAM(PERIOD_SIZE), | |
263 | HW_PARAM(PERIOD_BYTES), | |
264 | HW_PARAM(PERIODS), | |
265 | HW_PARAM(BUFFER_TIME), | |
266 | HW_PARAM(BUFFER_SIZE), | |
267 | HW_PARAM(BUFFER_BYTES), | |
268 | HW_PARAM(TICK_TIME), | |
269 | }; | |
270 | #endif | |
271 | ||
877211f5 TI |
272 | int snd_pcm_hw_refine(struct snd_pcm_substream *substream, |
273 | struct snd_pcm_hw_params *params) | |
1da177e4 LT |
274 | { |
275 | unsigned int k; | |
877211f5 TI |
276 | struct snd_pcm_hardware *hw; |
277 | struct snd_interval *i = NULL; | |
278 | struct snd_mask *m = NULL; | |
279 | struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints; | |
1da177e4 LT |
280 | unsigned int rstamps[constrs->rules_num]; |
281 | unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1]; | |
282 | unsigned int stamp = 2; | |
283 | int changed, again; | |
284 | ||
be4e31da TS |
285 | struct snd_mask __maybe_unused old_mask; |
286 | struct snd_interval __maybe_unused old_interval; | |
287 | ||
1da177e4 LT |
288 | params->info = 0; |
289 | params->fifo_size = 0; | |
290 | if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS)) | |
291 | params->msbits = 0; | |
292 | if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) { | |
293 | params->rate_num = 0; | |
294 | params->rate_den = 0; | |
295 | } | |
296 | ||
297 | for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { | |
298 | m = hw_param_mask(params, k); | |
299 | if (snd_mask_empty(m)) | |
300 | return -EINVAL; | |
301 | if (!(params->rmask & (1 << k))) | |
302 | continue; | |
be4e31da TS |
303 | |
304 | if (trace_hw_mask_param_enabled()) | |
305 | old_mask = *m; | |
1da177e4 | 306 | #ifdef RULES_DEBUG |
09e56df8 TI |
307 | pr_debug("%s = ", snd_pcm_hw_param_names[k]); |
308 | pr_cont("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); | |
1da177e4 LT |
309 | #endif |
310 | changed = snd_mask_refine(m, constrs_mask(constrs, k)); | |
311 | #ifdef RULES_DEBUG | |
09e56df8 | 312 | pr_cont("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); |
1da177e4 | 313 | #endif |
be4e31da TS |
314 | trace_hw_mask_param(substream, k, 0, &old_mask, m); |
315 | ||
1da177e4 LT |
316 | if (changed) |
317 | params->cmask |= 1 << k; | |
318 | if (changed < 0) | |
319 | return changed; | |
320 | } | |
321 | ||
322 | for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { | |
323 | i = hw_param_interval(params, k); | |
324 | if (snd_interval_empty(i)) | |
325 | return -EINVAL; | |
326 | if (!(params->rmask & (1 << k))) | |
327 | continue; | |
be4e31da TS |
328 | |
329 | if (trace_hw_interval_param_enabled()) | |
330 | old_interval = *i; | |
1da177e4 | 331 | #ifdef RULES_DEBUG |
09e56df8 | 332 | pr_debug("%s = ", snd_pcm_hw_param_names[k]); |
1da177e4 | 333 | if (i->empty) |
09e56df8 | 334 | pr_cont("empty"); |
1da177e4 | 335 | else |
09e56df8 | 336 | pr_cont("%c%u %u%c", |
1da177e4 LT |
337 | i->openmin ? '(' : '[', i->min, |
338 | i->max, i->openmax ? ')' : ']'); | |
09e56df8 | 339 | pr_cont(" -> "); |
1da177e4 LT |
340 | #endif |
341 | changed = snd_interval_refine(i, constrs_interval(constrs, k)); | |
342 | #ifdef RULES_DEBUG | |
343 | if (i->empty) | |
09e56df8 | 344 | pr_cont("empty\n"); |
1da177e4 | 345 | else |
09e56df8 | 346 | pr_cont("%c%u %u%c\n", |
1da177e4 LT |
347 | i->openmin ? '(' : '[', i->min, |
348 | i->max, i->openmax ? ')' : ']'); | |
349 | #endif | |
be4e31da TS |
350 | trace_hw_interval_param(substream, k, 0, &old_interval, i); |
351 | ||
1da177e4 LT |
352 | if (changed) |
353 | params->cmask |= 1 << k; | |
354 | if (changed < 0) | |
355 | return changed; | |
356 | } | |
357 | ||
358 | for (k = 0; k < constrs->rules_num; k++) | |
359 | rstamps[k] = 0; | |
360 | for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) | |
361 | vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0; | |
362 | do { | |
363 | again = 0; | |
364 | for (k = 0; k < constrs->rules_num; k++) { | |
877211f5 | 365 | struct snd_pcm_hw_rule *r = &constrs->rules[k]; |
1da177e4 LT |
366 | unsigned int d; |
367 | int doit = 0; | |
368 | if (r->cond && !(r->cond & params->flags)) | |
369 | continue; | |
370 | for (d = 0; r->deps[d] >= 0; d++) { | |
371 | if (vstamps[r->deps[d]] > rstamps[k]) { | |
372 | doit = 1; | |
373 | break; | |
374 | } | |
375 | } | |
376 | if (!doit) | |
377 | continue; | |
be4e31da TS |
378 | |
379 | if (trace_hw_mask_param_enabled()) { | |
380 | if (hw_is_mask(r->var)) | |
381 | old_mask = *hw_param_mask(params, r->var); | |
382 | } | |
383 | if (trace_hw_interval_param_enabled()) { | |
384 | if (hw_is_interval(r->var)) | |
385 | old_interval = *hw_param_interval(params, r->var); | |
386 | } | |
1da177e4 | 387 | #ifdef RULES_DEBUG |
09e56df8 | 388 | pr_debug("Rule %d [%p]: ", k, r->func); |
1da177e4 | 389 | if (r->var >= 0) { |
09e56df8 | 390 | pr_cont("%s = ", snd_pcm_hw_param_names[r->var]); |
1da177e4 LT |
391 | if (hw_is_mask(r->var)) { |
392 | m = hw_param_mask(params, r->var); | |
09e56df8 | 393 | pr_cont("%x", *m->bits); |
1da177e4 LT |
394 | } else { |
395 | i = hw_param_interval(params, r->var); | |
396 | if (i->empty) | |
09e56df8 | 397 | pr_cont("empty"); |
1da177e4 | 398 | else |
09e56df8 | 399 | pr_cont("%c%u %u%c", |
1da177e4 LT |
400 | i->openmin ? '(' : '[', i->min, |
401 | i->max, i->openmax ? ')' : ']'); | |
402 | } | |
403 | } | |
404 | #endif | |
405 | changed = r->func(params, r); | |
406 | #ifdef RULES_DEBUG | |
407 | if (r->var >= 0) { | |
09e56df8 | 408 | pr_cont(" -> "); |
1da177e4 | 409 | if (hw_is_mask(r->var)) |
09e56df8 | 410 | pr_cont("%x", *m->bits); |
1da177e4 LT |
411 | else { |
412 | if (i->empty) | |
09e56df8 | 413 | pr_cont("empty"); |
1da177e4 | 414 | else |
09e56df8 | 415 | pr_cont("%c%u %u%c", |
1da177e4 LT |
416 | i->openmin ? '(' : '[', i->min, |
417 | i->max, i->openmax ? ')' : ']'); | |
418 | } | |
419 | } | |
09e56df8 | 420 | pr_cont("\n"); |
1da177e4 | 421 | #endif |
be4e31da TS |
422 | if (hw_is_mask(r->var)) { |
423 | trace_hw_mask_param(substream, r->var, k + 1, | |
424 | &old_mask, hw_param_mask(params, r->var)); | |
425 | } | |
426 | if (hw_is_interval(r->var)) { | |
427 | trace_hw_interval_param(substream, r->var, k + 1, | |
428 | &old_interval, hw_param_interval(params, r->var)); | |
429 | } | |
1da177e4 LT |
430 | rstamps[k] = stamp; |
431 | if (changed && r->var >= 0) { | |
432 | params->cmask |= (1 << r->var); | |
433 | vstamps[r->var] = stamp; | |
434 | again = 1; | |
435 | } | |
436 | if (changed < 0) | |
437 | return changed; | |
438 | stamp++; | |
439 | } | |
440 | } while (again); | |
441 | if (!params->msbits) { | |
442 | i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); | |
443 | if (snd_interval_single(i)) | |
444 | params->msbits = snd_interval_value(i); | |
445 | } | |
446 | ||
447 | if (!params->rate_den) { | |
448 | i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); | |
449 | if (snd_interval_single(i)) { | |
450 | params->rate_num = snd_interval_value(i); | |
451 | params->rate_den = 1; | |
452 | } | |
453 | } | |
454 | ||
455 | hw = &substream->runtime->hw; | |
63825f3a | 456 | if (!params->info) { |
48d88297 LY |
457 | params->info = hw->info & ~(SNDRV_PCM_INFO_FIFO_IN_FRAMES | |
458 | SNDRV_PCM_INFO_DRAIN_TRIGGER); | |
63825f3a TI |
459 | if (!hw_support_mmap(substream)) |
460 | params->info &= ~(SNDRV_PCM_INFO_MMAP | | |
461 | SNDRV_PCM_INFO_MMAP_VALID); | |
462 | } | |
8bea869c | 463 | if (!params->fifo_size) { |
3be522a9 JK |
464 | m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); |
465 | i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); | |
466 | if (snd_mask_min(m) == snd_mask_max(m) && | |
467 | snd_interval_min(i) == snd_interval_max(i)) { | |
8bea869c JK |
468 | changed = substream->ops->ioctl(substream, |
469 | SNDRV_PCM_IOCTL1_FIFO_SIZE, params); | |
8bd9bca3 | 470 | if (changed < 0) |
8bea869c JK |
471 | return changed; |
472 | } | |
473 | } | |
1da177e4 LT |
474 | params->rmask = 0; |
475 | return 0; | |
476 | } | |
477 | ||
e88e8ae6 TI |
478 | EXPORT_SYMBOL(snd_pcm_hw_refine); |
479 | ||
877211f5 TI |
480 | static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream, |
481 | struct snd_pcm_hw_params __user * _params) | |
1da177e4 | 482 | { |
877211f5 | 483 | struct snd_pcm_hw_params *params; |
1da177e4 LT |
484 | int err; |
485 | ||
ef44a1ec LZ |
486 | params = memdup_user(_params, sizeof(*params)); |
487 | if (IS_ERR(params)) | |
488 | return PTR_ERR(params); | |
489 | ||
1da177e4 LT |
490 | err = snd_pcm_hw_refine(substream, params); |
491 | if (copy_to_user(_params, params, sizeof(*params))) { | |
492 | if (!err) | |
493 | err = -EFAULT; | |
494 | } | |
ef44a1ec | 495 | |
1da177e4 LT |
496 | kfree(params); |
497 | return err; | |
498 | } | |
499 | ||
9442e691 TI |
500 | static int period_to_usecs(struct snd_pcm_runtime *runtime) |
501 | { | |
502 | int usecs; | |
503 | ||
504 | if (! runtime->rate) | |
505 | return -1; /* invalid */ | |
506 | ||
507 | /* take 75% of period time as the deadline */ | |
508 | usecs = (750000 / runtime->rate) * runtime->period_size; | |
509 | usecs += ((750000 % runtime->rate) * runtime->period_size) / | |
510 | runtime->rate; | |
511 | ||
512 | return usecs; | |
513 | } | |
514 | ||
9b0573c0 TI |
515 | static void snd_pcm_set_state(struct snd_pcm_substream *substream, int state) |
516 | { | |
517 | snd_pcm_stream_lock_irq(substream); | |
518 | if (substream->runtime->status->state != SNDRV_PCM_STATE_DISCONNECTED) | |
519 | substream->runtime->status->state = state; | |
520 | snd_pcm_stream_unlock_irq(substream); | |
521 | } | |
522 | ||
90bbaf66 JY |
523 | static inline void snd_pcm_timer_notify(struct snd_pcm_substream *substream, |
524 | int event) | |
525 | { | |
526 | #ifdef CONFIG_SND_PCM_TIMER | |
527 | if (substream->timer) | |
528 | snd_timer_notify(substream->timer, event, | |
529 | &substream->runtime->trigger_tstamp); | |
530 | #endif | |
531 | } | |
532 | ||
877211f5 TI |
533 | static int snd_pcm_hw_params(struct snd_pcm_substream *substream, |
534 | struct snd_pcm_hw_params *params) | |
1da177e4 | 535 | { |
877211f5 | 536 | struct snd_pcm_runtime *runtime; |
9442e691 | 537 | int err, usecs; |
1da177e4 LT |
538 | unsigned int bits; |
539 | snd_pcm_uframes_t frames; | |
540 | ||
7eaa943c TI |
541 | if (PCM_RUNTIME_CHECK(substream)) |
542 | return -ENXIO; | |
1da177e4 | 543 | runtime = substream->runtime; |
1da177e4 LT |
544 | snd_pcm_stream_lock_irq(substream); |
545 | switch (runtime->status->state) { | |
546 | case SNDRV_PCM_STATE_OPEN: | |
547 | case SNDRV_PCM_STATE_SETUP: | |
548 | case SNDRV_PCM_STATE_PREPARED: | |
549 | break; | |
550 | default: | |
551 | snd_pcm_stream_unlock_irq(substream); | |
552 | return -EBADFD; | |
553 | } | |
554 | snd_pcm_stream_unlock_irq(substream); | |
8eeaa2f9 | 555 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
1da177e4 LT |
556 | if (!substream->oss.oss) |
557 | #endif | |
9c323fcb | 558 | if (atomic_read(&substream->mmap_count)) |
1da177e4 LT |
559 | return -EBADFD; |
560 | ||
561 | params->rmask = ~0U; | |
562 | err = snd_pcm_hw_refine(substream, params); | |
563 | if (err < 0) | |
564 | goto _error; | |
565 | ||
566 | err = snd_pcm_hw_params_choose(substream, params); | |
567 | if (err < 0) | |
568 | goto _error; | |
569 | ||
570 | if (substream->ops->hw_params != NULL) { | |
571 | err = substream->ops->hw_params(substream, params); | |
572 | if (err < 0) | |
573 | goto _error; | |
574 | } | |
575 | ||
576 | runtime->access = params_access(params); | |
577 | runtime->format = params_format(params); | |
578 | runtime->subformat = params_subformat(params); | |
579 | runtime->channels = params_channels(params); | |
580 | runtime->rate = params_rate(params); | |
581 | runtime->period_size = params_period_size(params); | |
582 | runtime->periods = params_periods(params); | |
583 | runtime->buffer_size = params_buffer_size(params); | |
1da177e4 LT |
584 | runtime->info = params->info; |
585 | runtime->rate_num = params->rate_num; | |
586 | runtime->rate_den = params->rate_den; | |
ab69a490 CL |
587 | runtime->no_period_wakeup = |
588 | (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) && | |
589 | (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP); | |
1da177e4 LT |
590 | |
591 | bits = snd_pcm_format_physical_width(runtime->format); | |
592 | runtime->sample_bits = bits; | |
593 | bits *= runtime->channels; | |
594 | runtime->frame_bits = bits; | |
595 | frames = 1; | |
596 | while (bits % 8 != 0) { | |
597 | bits *= 2; | |
598 | frames *= 2; | |
599 | } | |
600 | runtime->byte_align = bits / 8; | |
601 | runtime->min_align = frames; | |
602 | ||
603 | /* Default sw params */ | |
604 | runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; | |
605 | runtime->period_step = 1; | |
1da177e4 | 606 | runtime->control->avail_min = runtime->period_size; |
1da177e4 LT |
607 | runtime->start_threshold = 1; |
608 | runtime->stop_threshold = runtime->buffer_size; | |
609 | runtime->silence_threshold = 0; | |
610 | runtime->silence_size = 0; | |
ead4046b CL |
611 | runtime->boundary = runtime->buffer_size; |
612 | while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size) | |
613 | runtime->boundary *= 2; | |
1da177e4 LT |
614 | |
615 | snd_pcm_timer_resolution_change(substream); | |
9b0573c0 | 616 | snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP); |
9442e691 | 617 | |
82f68251 JB |
618 | if (pm_qos_request_active(&substream->latency_pm_qos_req)) |
619 | pm_qos_remove_request(&substream->latency_pm_qos_req); | |
9442e691 | 620 | if ((usecs = period_to_usecs(runtime)) >= 0) |
82f68251 JB |
621 | pm_qos_add_request(&substream->latency_pm_qos_req, |
622 | PM_QOS_CPU_DMA_LATENCY, usecs); | |
1da177e4 LT |
623 | return 0; |
624 | _error: | |
25985edc | 625 | /* hardware might be unusable from this time, |
1da177e4 LT |
626 | so we force application to retry to set |
627 | the correct hardware parameter settings */ | |
9b0573c0 | 628 | snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN); |
1da177e4 LT |
629 | if (substream->ops->hw_free != NULL) |
630 | substream->ops->hw_free(substream); | |
631 | return err; | |
632 | } | |
633 | ||
877211f5 TI |
634 | static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream, |
635 | struct snd_pcm_hw_params __user * _params) | |
1da177e4 | 636 | { |
877211f5 | 637 | struct snd_pcm_hw_params *params; |
1da177e4 LT |
638 | int err; |
639 | ||
ef44a1ec LZ |
640 | params = memdup_user(_params, sizeof(*params)); |
641 | if (IS_ERR(params)) | |
642 | return PTR_ERR(params); | |
643 | ||
1da177e4 LT |
644 | err = snd_pcm_hw_params(substream, params); |
645 | if (copy_to_user(_params, params, sizeof(*params))) { | |
646 | if (!err) | |
647 | err = -EFAULT; | |
648 | } | |
ef44a1ec | 649 | |
1da177e4 LT |
650 | kfree(params); |
651 | return err; | |
652 | } | |
653 | ||
877211f5 | 654 | static int snd_pcm_hw_free(struct snd_pcm_substream *substream) |
1da177e4 | 655 | { |
877211f5 | 656 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
657 | int result = 0; |
658 | ||
7eaa943c TI |
659 | if (PCM_RUNTIME_CHECK(substream)) |
660 | return -ENXIO; | |
1da177e4 | 661 | runtime = substream->runtime; |
1da177e4 LT |
662 | snd_pcm_stream_lock_irq(substream); |
663 | switch (runtime->status->state) { | |
664 | case SNDRV_PCM_STATE_SETUP: | |
665 | case SNDRV_PCM_STATE_PREPARED: | |
666 | break; | |
667 | default: | |
668 | snd_pcm_stream_unlock_irq(substream); | |
669 | return -EBADFD; | |
670 | } | |
671 | snd_pcm_stream_unlock_irq(substream); | |
9c323fcb | 672 | if (atomic_read(&substream->mmap_count)) |
1da177e4 LT |
673 | return -EBADFD; |
674 | if (substream->ops->hw_free) | |
675 | result = substream->ops->hw_free(substream); | |
9b0573c0 | 676 | snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN); |
82f68251 | 677 | pm_qos_remove_request(&substream->latency_pm_qos_req); |
1da177e4 LT |
678 | return result; |
679 | } | |
680 | ||
877211f5 TI |
681 | static int snd_pcm_sw_params(struct snd_pcm_substream *substream, |
682 | struct snd_pcm_sw_params *params) | |
1da177e4 | 683 | { |
877211f5 | 684 | struct snd_pcm_runtime *runtime; |
1250932e | 685 | int err; |
1da177e4 | 686 | |
7eaa943c TI |
687 | if (PCM_RUNTIME_CHECK(substream)) |
688 | return -ENXIO; | |
1da177e4 | 689 | runtime = substream->runtime; |
1da177e4 LT |
690 | snd_pcm_stream_lock_irq(substream); |
691 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { | |
692 | snd_pcm_stream_unlock_irq(substream); | |
693 | return -EBADFD; | |
694 | } | |
695 | snd_pcm_stream_unlock_irq(substream); | |
696 | ||
145d92e7 DC |
697 | if (params->tstamp_mode < 0 || |
698 | params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST) | |
1da177e4 | 699 | return -EINVAL; |
58900810 TI |
700 | if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12) && |
701 | params->tstamp_type > SNDRV_PCM_TSTAMP_TYPE_LAST) | |
5646eda5 | 702 | return -EINVAL; |
1da177e4 LT |
703 | if (params->avail_min == 0) |
704 | return -EINVAL; | |
1da177e4 LT |
705 | if (params->silence_size >= runtime->boundary) { |
706 | if (params->silence_threshold != 0) | |
707 | return -EINVAL; | |
708 | } else { | |
709 | if (params->silence_size > params->silence_threshold) | |
710 | return -EINVAL; | |
711 | if (params->silence_threshold > runtime->buffer_size) | |
712 | return -EINVAL; | |
713 | } | |
1250932e | 714 | err = 0; |
1da177e4 LT |
715 | snd_pcm_stream_lock_irq(substream); |
716 | runtime->tstamp_mode = params->tstamp_mode; | |
58900810 TI |
717 | if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12)) |
718 | runtime->tstamp_type = params->tstamp_type; | |
1da177e4 LT |
719 | runtime->period_step = params->period_step; |
720 | runtime->control->avail_min = params->avail_min; | |
721 | runtime->start_threshold = params->start_threshold; | |
722 | runtime->stop_threshold = params->stop_threshold; | |
723 | runtime->silence_threshold = params->silence_threshold; | |
724 | runtime->silence_size = params->silence_size; | |
1da177e4 LT |
725 | params->boundary = runtime->boundary; |
726 | if (snd_pcm_running(substream)) { | |
1da177e4 LT |
727 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && |
728 | runtime->silence_size > 0) | |
729 | snd_pcm_playback_silence(substream, ULONG_MAX); | |
1250932e | 730 | err = snd_pcm_update_state(substream, runtime); |
1da177e4 LT |
731 | } |
732 | snd_pcm_stream_unlock_irq(substream); | |
1250932e | 733 | return err; |
1da177e4 LT |
734 | } |
735 | ||
877211f5 TI |
736 | static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream, |
737 | struct snd_pcm_sw_params __user * _params) | |
1da177e4 | 738 | { |
877211f5 | 739 | struct snd_pcm_sw_params params; |
1da177e4 LT |
740 | int err; |
741 | if (copy_from_user(¶ms, _params, sizeof(params))) | |
742 | return -EFAULT; | |
743 | err = snd_pcm_sw_params(substream, ¶ms); | |
744 | if (copy_to_user(_params, ¶ms, sizeof(params))) | |
745 | return -EFAULT; | |
746 | return err; | |
747 | } | |
748 | ||
877211f5 TI |
749 | int snd_pcm_status(struct snd_pcm_substream *substream, |
750 | struct snd_pcm_status *status) | |
1da177e4 | 751 | { |
877211f5 | 752 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
753 | |
754 | snd_pcm_stream_lock_irq(substream); | |
3179f620 PLB |
755 | |
756 | snd_pcm_unpack_audio_tstamp_config(status->audio_tstamp_data, | |
757 | &runtime->audio_tstamp_config); | |
758 | ||
759 | /* backwards compatible behavior */ | |
760 | if (runtime->audio_tstamp_config.type_requested == | |
761 | SNDRV_PCM_AUDIO_TSTAMP_TYPE_COMPAT) { | |
762 | if (runtime->hw.info & SNDRV_PCM_INFO_HAS_WALL_CLOCK) | |
763 | runtime->audio_tstamp_config.type_requested = | |
764 | SNDRV_PCM_AUDIO_TSTAMP_TYPE_LINK; | |
765 | else | |
766 | runtime->audio_tstamp_config.type_requested = | |
767 | SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT; | |
768 | runtime->audio_tstamp_report.valid = 0; | |
769 | } else | |
770 | runtime->audio_tstamp_report.valid = 1; | |
771 | ||
1da177e4 LT |
772 | status->state = runtime->status->state; |
773 | status->suspended_state = runtime->status->suspended_state; | |
774 | if (status->state == SNDRV_PCM_STATE_OPEN) | |
775 | goto _end; | |
776 | status->trigger_tstamp = runtime->trigger_tstamp; | |
8c121586 | 777 | if (snd_pcm_running(substream)) { |
1da177e4 | 778 | snd_pcm_update_hw_ptr(substream); |
8c121586 JK |
779 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { |
780 | status->tstamp = runtime->status->tstamp; | |
3179f620 | 781 | status->driver_tstamp = runtime->driver_tstamp; |
4eeaaeae PLB |
782 | status->audio_tstamp = |
783 | runtime->status->audio_tstamp; | |
3179f620 PLB |
784 | if (runtime->audio_tstamp_report.valid == 1) |
785 | /* backwards compatibility, no report provided in COMPAT mode */ | |
786 | snd_pcm_pack_audio_tstamp_report(&status->audio_tstamp_data, | |
787 | &status->audio_tstamp_accuracy, | |
788 | &runtime->audio_tstamp_report); | |
789 | ||
8c121586 JK |
790 | goto _tstamp_end; |
791 | } | |
0d59b814 PLB |
792 | } else { |
793 | /* get tstamp only in fallback mode and only if enabled */ | |
794 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) | |
795 | snd_pcm_gettime(runtime, &status->tstamp); | |
8c121586 | 796 | } |
8c121586 | 797 | _tstamp_end: |
1da177e4 LT |
798 | status->appl_ptr = runtime->control->appl_ptr; |
799 | status->hw_ptr = runtime->status->hw_ptr; | |
800 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
801 | status->avail = snd_pcm_playback_avail(runtime); | |
802 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING || | |
4bbe1ddf | 803 | runtime->status->state == SNDRV_PCM_STATE_DRAINING) { |
1da177e4 | 804 | status->delay = runtime->buffer_size - status->avail; |
4bbe1ddf TI |
805 | status->delay += runtime->delay; |
806 | } else | |
1da177e4 LT |
807 | status->delay = 0; |
808 | } else { | |
809 | status->avail = snd_pcm_capture_avail(runtime); | |
810 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) | |
4bbe1ddf | 811 | status->delay = status->avail + runtime->delay; |
1da177e4 LT |
812 | else |
813 | status->delay = 0; | |
814 | } | |
815 | status->avail_max = runtime->avail_max; | |
816 | status->overrange = runtime->overrange; | |
817 | runtime->avail_max = 0; | |
818 | runtime->overrange = 0; | |
819 | _end: | |
820 | snd_pcm_stream_unlock_irq(substream); | |
821 | return 0; | |
822 | } | |
823 | ||
877211f5 | 824 | static int snd_pcm_status_user(struct snd_pcm_substream *substream, |
38ca2a4d PLB |
825 | struct snd_pcm_status __user * _status, |
826 | bool ext) | |
1da177e4 | 827 | { |
877211f5 | 828 | struct snd_pcm_status status; |
1da177e4 | 829 | int res; |
38ca2a4d | 830 | |
1da177e4 | 831 | memset(&status, 0, sizeof(status)); |
38ca2a4d PLB |
832 | /* |
833 | * with extension, parameters are read/write, | |
834 | * get audio_tstamp_data from user, | |
835 | * ignore rest of status structure | |
836 | */ | |
837 | if (ext && get_user(status.audio_tstamp_data, | |
838 | (u32 __user *)(&_status->audio_tstamp_data))) | |
839 | return -EFAULT; | |
1da177e4 LT |
840 | res = snd_pcm_status(substream, &status); |
841 | if (res < 0) | |
842 | return res; | |
843 | if (copy_to_user(_status, &status, sizeof(status))) | |
844 | return -EFAULT; | |
845 | return 0; | |
846 | } | |
847 | ||
877211f5 TI |
848 | static int snd_pcm_channel_info(struct snd_pcm_substream *substream, |
849 | struct snd_pcm_channel_info * info) | |
1da177e4 | 850 | { |
877211f5 | 851 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
852 | unsigned int channel; |
853 | ||
1da177e4 LT |
854 | channel = info->channel; |
855 | runtime = substream->runtime; | |
856 | snd_pcm_stream_lock_irq(substream); | |
857 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { | |
858 | snd_pcm_stream_unlock_irq(substream); | |
859 | return -EBADFD; | |
860 | } | |
861 | snd_pcm_stream_unlock_irq(substream); | |
862 | if (channel >= runtime->channels) | |
863 | return -EINVAL; | |
864 | memset(info, 0, sizeof(*info)); | |
865 | info->channel = channel; | |
866 | return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info); | |
867 | } | |
868 | ||
877211f5 TI |
869 | static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream, |
870 | struct snd_pcm_channel_info __user * _info) | |
1da177e4 | 871 | { |
877211f5 | 872 | struct snd_pcm_channel_info info; |
1da177e4 LT |
873 | int res; |
874 | ||
875 | if (copy_from_user(&info, _info, sizeof(info))) | |
876 | return -EFAULT; | |
877 | res = snd_pcm_channel_info(substream, &info); | |
878 | if (res < 0) | |
879 | return res; | |
880 | if (copy_to_user(_info, &info, sizeof(info))) | |
881 | return -EFAULT; | |
882 | return 0; | |
883 | } | |
884 | ||
877211f5 | 885 | static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream) |
1da177e4 | 886 | { |
877211f5 | 887 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
888 | if (runtime->trigger_master == NULL) |
889 | return; | |
890 | if (runtime->trigger_master == substream) { | |
2b79d7a6 PLB |
891 | if (!runtime->trigger_tstamp_latched) |
892 | snd_pcm_gettime(runtime, &runtime->trigger_tstamp); | |
1da177e4 LT |
893 | } else { |
894 | snd_pcm_trigger_tstamp(runtime->trigger_master); | |
895 | runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp; | |
896 | } | |
897 | runtime->trigger_master = NULL; | |
898 | } | |
899 | ||
900 | struct action_ops { | |
877211f5 TI |
901 | int (*pre_action)(struct snd_pcm_substream *substream, int state); |
902 | int (*do_action)(struct snd_pcm_substream *substream, int state); | |
903 | void (*undo_action)(struct snd_pcm_substream *substream, int state); | |
904 | void (*post_action)(struct snd_pcm_substream *substream, int state); | |
1da177e4 LT |
905 | }; |
906 | ||
907 | /* | |
908 | * this functions is core for handling of linked stream | |
909 | * Note: the stream state might be changed also on failure | |
910 | * Note2: call with calling stream lock + link lock | |
911 | */ | |
b17154cf | 912 | static int snd_pcm_action_group(const struct action_ops *ops, |
877211f5 | 913 | struct snd_pcm_substream *substream, |
1da177e4 LT |
914 | int state, int do_lock) |
915 | { | |
877211f5 TI |
916 | struct snd_pcm_substream *s = NULL; |
917 | struct snd_pcm_substream *s1; | |
dde1c652 | 918 | int res = 0, depth = 1; |
1da177e4 | 919 | |
ef991b95 | 920 | snd_pcm_group_for_each_entry(s, substream) { |
257f8cce TI |
921 | if (do_lock && s != substream) { |
922 | if (s->pcm->nonatomic) | |
dde1c652 | 923 | mutex_lock_nested(&s->self_group.mutex, depth); |
257f8cce | 924 | else |
dde1c652 TI |
925 | spin_lock_nested(&s->self_group.lock, depth); |
926 | depth++; | |
257f8cce | 927 | } |
1da177e4 LT |
928 | res = ops->pre_action(s, state); |
929 | if (res < 0) | |
930 | goto _unlock; | |
931 | } | |
ef991b95 | 932 | snd_pcm_group_for_each_entry(s, substream) { |
1da177e4 LT |
933 | res = ops->do_action(s, state); |
934 | if (res < 0) { | |
935 | if (ops->undo_action) { | |
ef991b95 | 936 | snd_pcm_group_for_each_entry(s1, substream) { |
1da177e4 LT |
937 | if (s1 == s) /* failed stream */ |
938 | break; | |
939 | ops->undo_action(s1, state); | |
940 | } | |
941 | } | |
942 | s = NULL; /* unlock all */ | |
943 | goto _unlock; | |
944 | } | |
945 | } | |
ef991b95 | 946 | snd_pcm_group_for_each_entry(s, substream) { |
1da177e4 LT |
947 | ops->post_action(s, state); |
948 | } | |
949 | _unlock: | |
950 | if (do_lock) { | |
951 | /* unlock streams */ | |
ef991b95 | 952 | snd_pcm_group_for_each_entry(s1, substream) { |
257f8cce | 953 | if (s1 != substream) { |
811deede | 954 | if (s1->pcm->nonatomic) |
257f8cce TI |
955 | mutex_unlock(&s1->self_group.mutex); |
956 | else | |
957 | spin_unlock(&s1->self_group.lock); | |
958 | } | |
1da177e4 LT |
959 | if (s1 == s) /* end */ |
960 | break; | |
961 | } | |
962 | } | |
963 | return res; | |
964 | } | |
965 | ||
966 | /* | |
967 | * Note: call with stream lock | |
968 | */ | |
b17154cf | 969 | static int snd_pcm_action_single(const struct action_ops *ops, |
877211f5 | 970 | struct snd_pcm_substream *substream, |
1da177e4 LT |
971 | int state) |
972 | { | |
973 | int res; | |
974 | ||
975 | res = ops->pre_action(substream, state); | |
976 | if (res < 0) | |
977 | return res; | |
978 | res = ops->do_action(substream, state); | |
979 | if (res == 0) | |
980 | ops->post_action(substream, state); | |
981 | else if (ops->undo_action) | |
982 | ops->undo_action(substream, state); | |
983 | return res; | |
984 | } | |
985 | ||
aa8edd8c TI |
986 | /* |
987 | * Note: call with stream lock | |
988 | */ | |
b17154cf | 989 | static int snd_pcm_action(const struct action_ops *ops, |
aa8edd8c TI |
990 | struct snd_pcm_substream *substream, |
991 | int state) | |
257f8cce TI |
992 | { |
993 | int res; | |
994 | ||
aa8edd8c TI |
995 | if (!snd_pcm_stream_linked(substream)) |
996 | return snd_pcm_action_single(ops, substream, state); | |
997 | ||
998 | if (substream->pcm->nonatomic) { | |
257f8cce TI |
999 | if (!mutex_trylock(&substream->group->mutex)) { |
1000 | mutex_unlock(&substream->self_group.mutex); | |
1001 | mutex_lock(&substream->group->mutex); | |
1002 | mutex_lock(&substream->self_group.mutex); | |
1003 | } | |
1004 | res = snd_pcm_action_group(ops, substream, state, 1); | |
1005 | mutex_unlock(&substream->group->mutex); | |
1006 | } else { | |
1da177e4 LT |
1007 | if (!spin_trylock(&substream->group->lock)) { |
1008 | spin_unlock(&substream->self_group.lock); | |
1009 | spin_lock(&substream->group->lock); | |
1010 | spin_lock(&substream->self_group.lock); | |
1011 | } | |
1012 | res = snd_pcm_action_group(ops, substream, state, 1); | |
1013 | spin_unlock(&substream->group->lock); | |
1da177e4 LT |
1014 | } |
1015 | return res; | |
1016 | } | |
1017 | ||
1018 | /* | |
1019 | * Note: don't use any locks before | |
1020 | */ | |
b17154cf | 1021 | static int snd_pcm_action_lock_irq(const struct action_ops *ops, |
877211f5 | 1022 | struct snd_pcm_substream *substream, |
1da177e4 LT |
1023 | int state) |
1024 | { | |
1025 | int res; | |
1026 | ||
e3a4bd5e TI |
1027 | snd_pcm_stream_lock_irq(substream); |
1028 | res = snd_pcm_action(ops, substream, state); | |
1029 | snd_pcm_stream_unlock_irq(substream); | |
1da177e4 LT |
1030 | return res; |
1031 | } | |
1032 | ||
1033 | /* | |
1034 | */ | |
b17154cf | 1035 | static int snd_pcm_action_nonatomic(const struct action_ops *ops, |
877211f5 | 1036 | struct snd_pcm_substream *substream, |
1da177e4 LT |
1037 | int state) |
1038 | { | |
1039 | int res; | |
1040 | ||
1041 | down_read(&snd_pcm_link_rwsem); | |
1042 | if (snd_pcm_stream_linked(substream)) | |
1043 | res = snd_pcm_action_group(ops, substream, state, 0); | |
1044 | else | |
1045 | res = snd_pcm_action_single(ops, substream, state); | |
1046 | up_read(&snd_pcm_link_rwsem); | |
1047 | return res; | |
1048 | } | |
1049 | ||
1050 | /* | |
1051 | * start callbacks | |
1052 | */ | |
877211f5 | 1053 | static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1054 | { |
877211f5 | 1055 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1056 | if (runtime->status->state != SNDRV_PCM_STATE_PREPARED) |
1057 | return -EBADFD; | |
1058 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && | |
1059 | !snd_pcm_playback_data(substream)) | |
1060 | return -EPIPE; | |
2b79d7a6 | 1061 | runtime->trigger_tstamp_latched = false; |
1da177e4 LT |
1062 | runtime->trigger_master = substream; |
1063 | return 0; | |
1064 | } | |
1065 | ||
877211f5 | 1066 | static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1067 | { |
1068 | if (substream->runtime->trigger_master != substream) | |
1069 | return 0; | |
1070 | return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START); | |
1071 | } | |
1072 | ||
877211f5 | 1073 | static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1074 | { |
1075 | if (substream->runtime->trigger_master == substream) | |
1076 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); | |
1077 | } | |
1078 | ||
877211f5 | 1079 | static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1080 | { |
877211f5 | 1081 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 1082 | snd_pcm_trigger_tstamp(substream); |
6af3fb72 | 1083 | runtime->hw_ptr_jiffies = jiffies; |
bd76af0f JK |
1084 | runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) / |
1085 | runtime->rate; | |
1da177e4 LT |
1086 | runtime->status->state = state; |
1087 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && | |
1088 | runtime->silence_size > 0) | |
1089 | snd_pcm_playback_silence(substream, ULONG_MAX); | |
90bbaf66 | 1090 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTART); |
1da177e4 LT |
1091 | } |
1092 | ||
b17154cf | 1093 | static const struct action_ops snd_pcm_action_start = { |
1da177e4 LT |
1094 | .pre_action = snd_pcm_pre_start, |
1095 | .do_action = snd_pcm_do_start, | |
1096 | .undo_action = snd_pcm_undo_start, | |
1097 | .post_action = snd_pcm_post_start | |
1098 | }; | |
1099 | ||
1100 | /** | |
1c85cc64 | 1101 | * snd_pcm_start - start all linked streams |
df8db936 | 1102 | * @substream: the PCM substream instance |
eb7c06e8 YB |
1103 | * |
1104 | * Return: Zero if successful, or a negative error code. | |
c2c86a97 | 1105 | * The stream lock must be acquired before calling this function. |
1da177e4 | 1106 | */ |
877211f5 | 1107 | int snd_pcm_start(struct snd_pcm_substream *substream) |
1da177e4 | 1108 | { |
877211f5 TI |
1109 | return snd_pcm_action(&snd_pcm_action_start, substream, |
1110 | SNDRV_PCM_STATE_RUNNING); | |
1da177e4 LT |
1111 | } |
1112 | ||
c2c86a97 TI |
1113 | /* take the stream lock and start the streams */ |
1114 | static int snd_pcm_start_lock_irq(struct snd_pcm_substream *substream) | |
1115 | { | |
1116 | return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, | |
1117 | SNDRV_PCM_STATE_RUNNING); | |
1118 | } | |
1119 | ||
1da177e4 LT |
1120 | /* |
1121 | * stop callbacks | |
1122 | */ | |
877211f5 | 1123 | static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1124 | { |
877211f5 | 1125 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1126 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
1127 | return -EBADFD; | |
1128 | runtime->trigger_master = substream; | |
1129 | return 0; | |
1130 | } | |
1131 | ||
877211f5 | 1132 | static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1133 | { |
1134 | if (substream->runtime->trigger_master == substream && | |
1135 | snd_pcm_running(substream)) | |
1136 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); | |
1137 | return 0; /* unconditonally stop all substreams */ | |
1138 | } | |
1139 | ||
877211f5 | 1140 | static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1141 | { |
877211f5 | 1142 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1143 | if (runtime->status->state != state) { |
1144 | snd_pcm_trigger_tstamp(substream); | |
9bc889b4 | 1145 | runtime->status->state = state; |
90bbaf66 | 1146 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTOP); |
1da177e4 LT |
1147 | } |
1148 | wake_up(&runtime->sleep); | |
c91a988d | 1149 | wake_up(&runtime->tsleep); |
1da177e4 LT |
1150 | } |
1151 | ||
b17154cf | 1152 | static const struct action_ops snd_pcm_action_stop = { |
1da177e4 LT |
1153 | .pre_action = snd_pcm_pre_stop, |
1154 | .do_action = snd_pcm_do_stop, | |
1155 | .post_action = snd_pcm_post_stop | |
1156 | }; | |
1157 | ||
1158 | /** | |
1c85cc64 | 1159 | * snd_pcm_stop - try to stop all running streams in the substream group |
df8db936 TI |
1160 | * @substream: the PCM substream instance |
1161 | * @state: PCM state after stopping the stream | |
1da177e4 | 1162 | * |
1c85cc64 | 1163 | * The state of each stream is then changed to the given state unconditionally. |
eb7c06e8 | 1164 | * |
0a11458c | 1165 | * Return: Zero if successful, or a negative error code. |
1da177e4 | 1166 | */ |
fea952e5 | 1167 | int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state) |
1da177e4 LT |
1168 | { |
1169 | return snd_pcm_action(&snd_pcm_action_stop, substream, state); | |
1170 | } | |
1171 | ||
e88e8ae6 TI |
1172 | EXPORT_SYMBOL(snd_pcm_stop); |
1173 | ||
1da177e4 | 1174 | /** |
1c85cc64 | 1175 | * snd_pcm_drain_done - stop the DMA only when the given stream is playback |
df8db936 | 1176 | * @substream: the PCM substream |
1da177e4 | 1177 | * |
1c85cc64 | 1178 | * After stopping, the state is changed to SETUP. |
1da177e4 | 1179 | * Unlike snd_pcm_stop(), this affects only the given stream. |
eb7c06e8 YB |
1180 | * |
1181 | * Return: Zero if succesful, or a negative error code. | |
1da177e4 | 1182 | */ |
877211f5 | 1183 | int snd_pcm_drain_done(struct snd_pcm_substream *substream) |
1da177e4 | 1184 | { |
877211f5 TI |
1185 | return snd_pcm_action_single(&snd_pcm_action_stop, substream, |
1186 | SNDRV_PCM_STATE_SETUP); | |
1da177e4 LT |
1187 | } |
1188 | ||
1fb8510c TI |
1189 | /** |
1190 | * snd_pcm_stop_xrun - stop the running streams as XRUN | |
1191 | * @substream: the PCM substream instance | |
1fb8510c TI |
1192 | * |
1193 | * This stops the given running substream (and all linked substreams) as XRUN. | |
1194 | * Unlike snd_pcm_stop(), this function takes the substream lock by itself. | |
1195 | * | |
1196 | * Return: Zero if successful, or a negative error code. | |
1197 | */ | |
1198 | int snd_pcm_stop_xrun(struct snd_pcm_substream *substream) | |
1199 | { | |
1200 | unsigned long flags; | |
1201 | int ret = 0; | |
1202 | ||
1203 | snd_pcm_stream_lock_irqsave(substream, flags); | |
1204 | if (snd_pcm_running(substream)) | |
1205 | ret = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); | |
1206 | snd_pcm_stream_unlock_irqrestore(substream, flags); | |
1207 | return ret; | |
1208 | } | |
1209 | EXPORT_SYMBOL_GPL(snd_pcm_stop_xrun); | |
1210 | ||
1da177e4 LT |
1211 | /* |
1212 | * pause callbacks | |
1213 | */ | |
877211f5 | 1214 | static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push) |
1da177e4 | 1215 | { |
877211f5 | 1216 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1217 | if (!(runtime->info & SNDRV_PCM_INFO_PAUSE)) |
1218 | return -ENOSYS; | |
1219 | if (push) { | |
1220 | if (runtime->status->state != SNDRV_PCM_STATE_RUNNING) | |
1221 | return -EBADFD; | |
1222 | } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED) | |
1223 | return -EBADFD; | |
1224 | runtime->trigger_master = substream; | |
1225 | return 0; | |
1226 | } | |
1227 | ||
877211f5 | 1228 | static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push) |
1da177e4 LT |
1229 | { |
1230 | if (substream->runtime->trigger_master != substream) | |
1231 | return 0; | |
56385a12 JK |
1232 | /* some drivers might use hw_ptr to recover from the pause - |
1233 | update the hw_ptr now */ | |
1234 | if (push) | |
1235 | snd_pcm_update_hw_ptr(substream); | |
6af3fb72 | 1236 | /* The jiffies check in snd_pcm_update_hw_ptr*() is done by |
b595076a | 1237 | * a delta between the current jiffies, this gives a large enough |
6af3fb72 TI |
1238 | * delta, effectively to skip the check once. |
1239 | */ | |
1240 | substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000; | |
1da177e4 LT |
1241 | return substream->ops->trigger(substream, |
1242 | push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH : | |
1243 | SNDRV_PCM_TRIGGER_PAUSE_RELEASE); | |
1244 | } | |
1245 | ||
877211f5 | 1246 | static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push) |
1da177e4 LT |
1247 | { |
1248 | if (substream->runtime->trigger_master == substream) | |
1249 | substream->ops->trigger(substream, | |
1250 | push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE : | |
1251 | SNDRV_PCM_TRIGGER_PAUSE_PUSH); | |
1252 | } | |
1253 | ||
877211f5 | 1254 | static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push) |
1da177e4 | 1255 | { |
877211f5 | 1256 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1257 | snd_pcm_trigger_tstamp(substream); |
1258 | if (push) { | |
1259 | runtime->status->state = SNDRV_PCM_STATE_PAUSED; | |
90bbaf66 | 1260 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MPAUSE); |
1da177e4 | 1261 | wake_up(&runtime->sleep); |
c91a988d | 1262 | wake_up(&runtime->tsleep); |
1da177e4 LT |
1263 | } else { |
1264 | runtime->status->state = SNDRV_PCM_STATE_RUNNING; | |
90bbaf66 | 1265 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MCONTINUE); |
1da177e4 LT |
1266 | } |
1267 | } | |
1268 | ||
b17154cf | 1269 | static const struct action_ops snd_pcm_action_pause = { |
1da177e4 LT |
1270 | .pre_action = snd_pcm_pre_pause, |
1271 | .do_action = snd_pcm_do_pause, | |
1272 | .undo_action = snd_pcm_undo_pause, | |
1273 | .post_action = snd_pcm_post_pause | |
1274 | }; | |
1275 | ||
1276 | /* | |
1277 | * Push/release the pause for all linked streams. | |
1278 | */ | |
877211f5 | 1279 | static int snd_pcm_pause(struct snd_pcm_substream *substream, int push) |
1da177e4 LT |
1280 | { |
1281 | return snd_pcm_action(&snd_pcm_action_pause, substream, push); | |
1282 | } | |
1283 | ||
1284 | #ifdef CONFIG_PM | |
1285 | /* suspend */ | |
1286 | ||
877211f5 | 1287 | static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1288 | { |
877211f5 | 1289 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1290 | if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) |
1291 | return -EBUSY; | |
1292 | runtime->trigger_master = substream; | |
1293 | return 0; | |
1294 | } | |
1295 | ||
877211f5 | 1296 | static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1297 | { |
877211f5 | 1298 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1299 | if (runtime->trigger_master != substream) |
1300 | return 0; | |
1301 | if (! snd_pcm_running(substream)) | |
1302 | return 0; | |
1303 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); | |
1304 | return 0; /* suspend unconditionally */ | |
1305 | } | |
1306 | ||
877211f5 | 1307 | static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1308 | { |
877211f5 | 1309 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 1310 | snd_pcm_trigger_tstamp(substream); |
9bc889b4 TI |
1311 | runtime->status->suspended_state = runtime->status->state; |
1312 | runtime->status->state = SNDRV_PCM_STATE_SUSPENDED; | |
90bbaf66 | 1313 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSUSPEND); |
1da177e4 | 1314 | wake_up(&runtime->sleep); |
c91a988d | 1315 | wake_up(&runtime->tsleep); |
1da177e4 LT |
1316 | } |
1317 | ||
b17154cf | 1318 | static const struct action_ops snd_pcm_action_suspend = { |
1da177e4 LT |
1319 | .pre_action = snd_pcm_pre_suspend, |
1320 | .do_action = snd_pcm_do_suspend, | |
1321 | .post_action = snd_pcm_post_suspend | |
1322 | }; | |
1323 | ||
1324 | /** | |
1c85cc64 | 1325 | * snd_pcm_suspend - trigger SUSPEND to all linked streams |
df8db936 | 1326 | * @substream: the PCM substream |
1da177e4 | 1327 | * |
1da177e4 | 1328 | * After this call, all streams are changed to SUSPENDED state. |
eb7c06e8 YB |
1329 | * |
1330 | * Return: Zero if successful (or @substream is %NULL), or a negative error | |
1331 | * code. | |
1da177e4 | 1332 | */ |
877211f5 | 1333 | int snd_pcm_suspend(struct snd_pcm_substream *substream) |
1da177e4 LT |
1334 | { |
1335 | int err; | |
1336 | unsigned long flags; | |
1337 | ||
603bf524 TI |
1338 | if (! substream) |
1339 | return 0; | |
1340 | ||
1da177e4 LT |
1341 | snd_pcm_stream_lock_irqsave(substream, flags); |
1342 | err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0); | |
1343 | snd_pcm_stream_unlock_irqrestore(substream, flags); | |
1344 | return err; | |
1345 | } | |
1346 | ||
e88e8ae6 TI |
1347 | EXPORT_SYMBOL(snd_pcm_suspend); |
1348 | ||
1da177e4 | 1349 | /** |
1c85cc64 | 1350 | * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm |
df8db936 | 1351 | * @pcm: the PCM instance |
1da177e4 | 1352 | * |
1da177e4 | 1353 | * After this call, all streams are changed to SUSPENDED state. |
eb7c06e8 YB |
1354 | * |
1355 | * Return: Zero if successful (or @pcm is %NULL), or a negative error code. | |
1da177e4 | 1356 | */ |
877211f5 | 1357 | int snd_pcm_suspend_all(struct snd_pcm *pcm) |
1da177e4 | 1358 | { |
877211f5 | 1359 | struct snd_pcm_substream *substream; |
1da177e4 LT |
1360 | int stream, err = 0; |
1361 | ||
603bf524 TI |
1362 | if (! pcm) |
1363 | return 0; | |
1364 | ||
1da177e4 | 1365 | for (stream = 0; stream < 2; stream++) { |
877211f5 TI |
1366 | for (substream = pcm->streams[stream].substream; |
1367 | substream; substream = substream->next) { | |
1da177e4 LT |
1368 | /* FIXME: the open/close code should lock this as well */ |
1369 | if (substream->runtime == NULL) | |
1370 | continue; | |
1371 | err = snd_pcm_suspend(substream); | |
1372 | if (err < 0 && err != -EBUSY) | |
1373 | return err; | |
1374 | } | |
1375 | } | |
1376 | return 0; | |
1377 | } | |
1378 | ||
e88e8ae6 TI |
1379 | EXPORT_SYMBOL(snd_pcm_suspend_all); |
1380 | ||
1da177e4 LT |
1381 | /* resume */ |
1382 | ||
877211f5 | 1383 | static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1384 | { |
877211f5 | 1385 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1386 | if (!(runtime->info & SNDRV_PCM_INFO_RESUME)) |
1387 | return -ENOSYS; | |
1388 | runtime->trigger_master = substream; | |
1389 | return 0; | |
1390 | } | |
1391 | ||
877211f5 | 1392 | static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1393 | { |
877211f5 | 1394 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1395 | if (runtime->trigger_master != substream) |
1396 | return 0; | |
1397 | /* DMA not running previously? */ | |
1398 | if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING && | |
1399 | (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING || | |
1400 | substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) | |
1401 | return 0; | |
1402 | return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME); | |
1403 | } | |
1404 | ||
877211f5 | 1405 | static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1406 | { |
1407 | if (substream->runtime->trigger_master == substream && | |
1408 | snd_pcm_running(substream)) | |
1409 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); | |
1410 | } | |
1411 | ||
877211f5 | 1412 | static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1413 | { |
877211f5 | 1414 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 1415 | snd_pcm_trigger_tstamp(substream); |
9bc889b4 | 1416 | runtime->status->state = runtime->status->suspended_state; |
90bbaf66 | 1417 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MRESUME); |
1da177e4 LT |
1418 | } |
1419 | ||
b17154cf | 1420 | static const struct action_ops snd_pcm_action_resume = { |
1da177e4 LT |
1421 | .pre_action = snd_pcm_pre_resume, |
1422 | .do_action = snd_pcm_do_resume, | |
1423 | .undo_action = snd_pcm_undo_resume, | |
1424 | .post_action = snd_pcm_post_resume | |
1425 | }; | |
1426 | ||
877211f5 | 1427 | static int snd_pcm_resume(struct snd_pcm_substream *substream) |
1da177e4 | 1428 | { |
877211f5 | 1429 | struct snd_card *card = substream->pcm->card; |
1da177e4 LT |
1430 | int res; |
1431 | ||
1432 | snd_power_lock(card); | |
cbac4b0c | 1433 | if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0) |
1da177e4 LT |
1434 | res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0); |
1435 | snd_power_unlock(card); | |
1436 | return res; | |
1437 | } | |
1438 | ||
1439 | #else | |
1440 | ||
877211f5 | 1441 | static int snd_pcm_resume(struct snd_pcm_substream *substream) |
1da177e4 LT |
1442 | { |
1443 | return -ENOSYS; | |
1444 | } | |
1445 | ||
1446 | #endif /* CONFIG_PM */ | |
1447 | ||
1448 | /* | |
1449 | * xrun ioctl | |
1450 | * | |
1451 | * Change the RUNNING stream(s) to XRUN state. | |
1452 | */ | |
877211f5 | 1453 | static int snd_pcm_xrun(struct snd_pcm_substream *substream) |
1da177e4 | 1454 | { |
877211f5 TI |
1455 | struct snd_card *card = substream->pcm->card; |
1456 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
1457 | int result; |
1458 | ||
1459 | snd_power_lock(card); | |
1460 | if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { | |
cbac4b0c | 1461 | result = snd_power_wait(card, SNDRV_CTL_POWER_D0); |
1da177e4 LT |
1462 | if (result < 0) |
1463 | goto _unlock; | |
1464 | } | |
1465 | ||
1466 | snd_pcm_stream_lock_irq(substream); | |
1467 | switch (runtime->status->state) { | |
1468 | case SNDRV_PCM_STATE_XRUN: | |
1469 | result = 0; /* already there */ | |
1470 | break; | |
1471 | case SNDRV_PCM_STATE_RUNNING: | |
1472 | result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); | |
1473 | break; | |
1474 | default: | |
1475 | result = -EBADFD; | |
1476 | } | |
1477 | snd_pcm_stream_unlock_irq(substream); | |
1478 | _unlock: | |
1479 | snd_power_unlock(card); | |
1480 | return result; | |
1481 | } | |
1482 | ||
1483 | /* | |
1484 | * reset ioctl | |
1485 | */ | |
877211f5 | 1486 | static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1487 | { |
877211f5 | 1488 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1489 | switch (runtime->status->state) { |
1490 | case SNDRV_PCM_STATE_RUNNING: | |
1491 | case SNDRV_PCM_STATE_PREPARED: | |
1492 | case SNDRV_PCM_STATE_PAUSED: | |
1493 | case SNDRV_PCM_STATE_SUSPENDED: | |
1494 | return 0; | |
1495 | default: | |
1496 | return -EBADFD; | |
1497 | } | |
1498 | } | |
1499 | ||
877211f5 | 1500 | static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1501 | { |
877211f5 | 1502 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1503 | int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL); |
1504 | if (err < 0) | |
1505 | return err; | |
1da177e4 | 1506 | runtime->hw_ptr_base = 0; |
e7636925 JK |
1507 | runtime->hw_ptr_interrupt = runtime->status->hw_ptr - |
1508 | runtime->status->hw_ptr % runtime->period_size; | |
1da177e4 LT |
1509 | runtime->silence_start = runtime->status->hw_ptr; |
1510 | runtime->silence_filled = 0; | |
1511 | return 0; | |
1512 | } | |
1513 | ||
877211f5 | 1514 | static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1515 | { |
877211f5 | 1516 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1517 | runtime->control->appl_ptr = runtime->status->hw_ptr; |
1518 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && | |
1519 | runtime->silence_size > 0) | |
1520 | snd_pcm_playback_silence(substream, ULONG_MAX); | |
1521 | } | |
1522 | ||
b17154cf | 1523 | static const struct action_ops snd_pcm_action_reset = { |
1da177e4 LT |
1524 | .pre_action = snd_pcm_pre_reset, |
1525 | .do_action = snd_pcm_do_reset, | |
1526 | .post_action = snd_pcm_post_reset | |
1527 | }; | |
1528 | ||
877211f5 | 1529 | static int snd_pcm_reset(struct snd_pcm_substream *substream) |
1da177e4 LT |
1530 | { |
1531 | return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0); | |
1532 | } | |
1533 | ||
1534 | /* | |
1535 | * prepare ioctl | |
1536 | */ | |
0df63e44 TI |
1537 | /* we use the second argument for updating f_flags */ |
1538 | static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream, | |
1539 | int f_flags) | |
1da177e4 | 1540 | { |
877211f5 | 1541 | struct snd_pcm_runtime *runtime = substream->runtime; |
de1b8b93 TI |
1542 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN || |
1543 | runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED) | |
1da177e4 LT |
1544 | return -EBADFD; |
1545 | if (snd_pcm_running(substream)) | |
1546 | return -EBUSY; | |
0df63e44 | 1547 | substream->f_flags = f_flags; |
1da177e4 LT |
1548 | return 0; |
1549 | } | |
1550 | ||
877211f5 | 1551 | static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1552 | { |
1553 | int err; | |
1554 | err = substream->ops->prepare(substream); | |
1555 | if (err < 0) | |
1556 | return err; | |
1557 | return snd_pcm_do_reset(substream, 0); | |
1558 | } | |
1559 | ||
877211f5 | 1560 | static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1561 | { |
877211f5 | 1562 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 1563 | runtime->control->appl_ptr = runtime->status->hw_ptr; |
9b0573c0 | 1564 | snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED); |
1da177e4 LT |
1565 | } |
1566 | ||
b17154cf | 1567 | static const struct action_ops snd_pcm_action_prepare = { |
1da177e4 LT |
1568 | .pre_action = snd_pcm_pre_prepare, |
1569 | .do_action = snd_pcm_do_prepare, | |
1570 | .post_action = snd_pcm_post_prepare | |
1571 | }; | |
1572 | ||
1573 | /** | |
1c85cc64 | 1574 | * snd_pcm_prepare - prepare the PCM substream to be triggerable |
df8db936 | 1575 | * @substream: the PCM substream instance |
0df63e44 | 1576 | * @file: file to refer f_flags |
eb7c06e8 YB |
1577 | * |
1578 | * Return: Zero if successful, or a negative error code. | |
1da177e4 | 1579 | */ |
0df63e44 TI |
1580 | static int snd_pcm_prepare(struct snd_pcm_substream *substream, |
1581 | struct file *file) | |
1da177e4 LT |
1582 | { |
1583 | int res; | |
877211f5 | 1584 | struct snd_card *card = substream->pcm->card; |
0df63e44 TI |
1585 | int f_flags; |
1586 | ||
1587 | if (file) | |
1588 | f_flags = file->f_flags; | |
1589 | else | |
1590 | f_flags = substream->f_flags; | |
1da177e4 LT |
1591 | |
1592 | snd_power_lock(card); | |
cbac4b0c | 1593 | if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0) |
0df63e44 TI |
1594 | res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare, |
1595 | substream, f_flags); | |
1da177e4 LT |
1596 | snd_power_unlock(card); |
1597 | return res; | |
1598 | } | |
1599 | ||
1600 | /* | |
1601 | * drain ioctl | |
1602 | */ | |
1603 | ||
877211f5 | 1604 | static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1605 | { |
4f7c39dc TI |
1606 | struct snd_pcm_runtime *runtime = substream->runtime; |
1607 | switch (runtime->status->state) { | |
1608 | case SNDRV_PCM_STATE_OPEN: | |
1609 | case SNDRV_PCM_STATE_DISCONNECTED: | |
1610 | case SNDRV_PCM_STATE_SUSPENDED: | |
1611 | return -EBADFD; | |
1612 | } | |
1613 | runtime->trigger_master = substream; | |
1da177e4 LT |
1614 | return 0; |
1615 | } | |
1616 | ||
877211f5 | 1617 | static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1618 | { |
877211f5 | 1619 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1620 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
1621 | switch (runtime->status->state) { | |
1622 | case SNDRV_PCM_STATE_PREPARED: | |
1623 | /* start playback stream if possible */ | |
1624 | if (! snd_pcm_playback_empty(substream)) { | |
1625 | snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING); | |
1626 | snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING); | |
70372a75 TI |
1627 | } else { |
1628 | runtime->status->state = SNDRV_PCM_STATE_SETUP; | |
1da177e4 LT |
1629 | } |
1630 | break; | |
1631 | case SNDRV_PCM_STATE_RUNNING: | |
1632 | runtime->status->state = SNDRV_PCM_STATE_DRAINING; | |
1633 | break; | |
4f7c39dc TI |
1634 | case SNDRV_PCM_STATE_XRUN: |
1635 | runtime->status->state = SNDRV_PCM_STATE_SETUP; | |
1636 | break; | |
1da177e4 LT |
1637 | default: |
1638 | break; | |
1639 | } | |
1640 | } else { | |
1641 | /* stop running stream */ | |
1642 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) { | |
b05e5787 | 1643 | int new_state = snd_pcm_capture_avail(runtime) > 0 ? |
1da177e4 | 1644 | SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP; |
b05e5787 MŚ |
1645 | snd_pcm_do_stop(substream, new_state); |
1646 | snd_pcm_post_stop(substream, new_state); | |
1da177e4 LT |
1647 | } |
1648 | } | |
48d88297 LY |
1649 | |
1650 | if (runtime->status->state == SNDRV_PCM_STATE_DRAINING && | |
1651 | runtime->trigger_master == substream && | |
1652 | (runtime->hw.info & SNDRV_PCM_INFO_DRAIN_TRIGGER)) | |
1653 | return substream->ops->trigger(substream, | |
1654 | SNDRV_PCM_TRIGGER_DRAIN); | |
1655 | ||
1da177e4 LT |
1656 | return 0; |
1657 | } | |
1658 | ||
877211f5 | 1659 | static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1660 | { |
1661 | } | |
1662 | ||
b17154cf | 1663 | static const struct action_ops snd_pcm_action_drain_init = { |
1da177e4 LT |
1664 | .pre_action = snd_pcm_pre_drain_init, |
1665 | .do_action = snd_pcm_do_drain_init, | |
1666 | .post_action = snd_pcm_post_drain_init | |
1667 | }; | |
1668 | ||
877211f5 | 1669 | static int snd_pcm_drop(struct snd_pcm_substream *substream); |
1da177e4 LT |
1670 | |
1671 | /* | |
1672 | * Drain the stream(s). | |
1673 | * When the substream is linked, sync until the draining of all playback streams | |
1674 | * is finished. | |
1675 | * After this call, all streams are supposed to be either SETUP or DRAINING | |
1676 | * (capture only) state. | |
1677 | */ | |
4cdc115f TI |
1678 | static int snd_pcm_drain(struct snd_pcm_substream *substream, |
1679 | struct file *file) | |
1da177e4 | 1680 | { |
877211f5 TI |
1681 | struct snd_card *card; |
1682 | struct snd_pcm_runtime *runtime; | |
ef991b95 | 1683 | struct snd_pcm_substream *s; |
d3a7dcfe | 1684 | wait_queue_t wait; |
1da177e4 | 1685 | int result = 0; |
4cdc115f | 1686 | int nonblock = 0; |
1da177e4 | 1687 | |
1da177e4 LT |
1688 | card = substream->pcm->card; |
1689 | runtime = substream->runtime; | |
1690 | ||
1691 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
1692 | return -EBADFD; | |
1693 | ||
1da177e4 LT |
1694 | snd_power_lock(card); |
1695 | if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { | |
cbac4b0c | 1696 | result = snd_power_wait(card, SNDRV_CTL_POWER_D0); |
21cb2a2e TI |
1697 | if (result < 0) { |
1698 | snd_power_unlock(card); | |
1699 | return result; | |
1700 | } | |
1da177e4 LT |
1701 | } |
1702 | ||
4cdc115f TI |
1703 | if (file) { |
1704 | if (file->f_flags & O_NONBLOCK) | |
1705 | nonblock = 1; | |
1706 | } else if (substream->f_flags & O_NONBLOCK) | |
1707 | nonblock = 1; | |
1708 | ||
21cb2a2e | 1709 | down_read(&snd_pcm_link_rwsem); |
21cb2a2e TI |
1710 | snd_pcm_stream_lock_irq(substream); |
1711 | /* resume pause */ | |
d3a7dcfe | 1712 | if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) |
21cb2a2e TI |
1713 | snd_pcm_pause(substream, 0); |
1714 | ||
1715 | /* pre-start/stop - all running streams are changed to DRAINING state */ | |
1716 | result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0); | |
4cdc115f TI |
1717 | if (result < 0) |
1718 | goto unlock; | |
1719 | /* in non-blocking, we don't wait in ioctl but let caller poll */ | |
1720 | if (nonblock) { | |
1721 | result = -EAGAIN; | |
1722 | goto unlock; | |
21cb2a2e | 1723 | } |
1da177e4 LT |
1724 | |
1725 | for (;;) { | |
1726 | long tout; | |
d3a7dcfe | 1727 | struct snd_pcm_runtime *to_check; |
1da177e4 LT |
1728 | if (signal_pending(current)) { |
1729 | result = -ERESTARTSYS; | |
1730 | break; | |
1731 | } | |
d3a7dcfe TI |
1732 | /* find a substream to drain */ |
1733 | to_check = NULL; | |
1734 | snd_pcm_group_for_each_entry(s, substream) { | |
1735 | if (s->stream != SNDRV_PCM_STREAM_PLAYBACK) | |
1736 | continue; | |
1737 | runtime = s->runtime; | |
1738 | if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { | |
1739 | to_check = runtime; | |
21cb2a2e | 1740 | break; |
d3a7dcfe | 1741 | } |
21cb2a2e | 1742 | } |
d3a7dcfe TI |
1743 | if (!to_check) |
1744 | break; /* all drained */ | |
1745 | init_waitqueue_entry(&wait, current); | |
1746 | add_wait_queue(&to_check->sleep, &wait); | |
1da177e4 | 1747 | snd_pcm_stream_unlock_irq(substream); |
d3a7dcfe | 1748 | up_read(&snd_pcm_link_rwsem); |
1da177e4 | 1749 | snd_power_unlock(card); |
f2b3614c TI |
1750 | if (runtime->no_period_wakeup) |
1751 | tout = MAX_SCHEDULE_TIMEOUT; | |
1752 | else { | |
1753 | tout = 10; | |
1754 | if (runtime->rate) { | |
1755 | long t = runtime->period_size * 2 / runtime->rate; | |
1756 | tout = max(t, tout); | |
1757 | } | |
1758 | tout = msecs_to_jiffies(tout * 1000); | |
1759 | } | |
1760 | tout = schedule_timeout_interruptible(tout); | |
1da177e4 | 1761 | snd_power_lock(card); |
d3a7dcfe | 1762 | down_read(&snd_pcm_link_rwsem); |
1da177e4 | 1763 | snd_pcm_stream_lock_irq(substream); |
d3a7dcfe | 1764 | remove_wait_queue(&to_check->sleep, &wait); |
0914f796 TI |
1765 | if (card->shutdown) { |
1766 | result = -ENODEV; | |
1767 | break; | |
1768 | } | |
1da177e4 LT |
1769 | if (tout == 0) { |
1770 | if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) | |
1771 | result = -ESTRPIPE; | |
1772 | else { | |
09e56df8 TI |
1773 | dev_dbg(substream->pcm->card->dev, |
1774 | "playback drain error (DMA or IRQ trouble?)\n"); | |
1da177e4 LT |
1775 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); |
1776 | result = -EIO; | |
1777 | } | |
1778 | break; | |
1779 | } | |
1da177e4 | 1780 | } |
21cb2a2e | 1781 | |
4cdc115f | 1782 | unlock: |
21cb2a2e | 1783 | snd_pcm_stream_unlock_irq(substream); |
d3a7dcfe | 1784 | up_read(&snd_pcm_link_rwsem); |
1da177e4 | 1785 | snd_power_unlock(card); |
1da177e4 LT |
1786 | |
1787 | return result; | |
1788 | } | |
1789 | ||
1790 | /* | |
1791 | * drop ioctl | |
1792 | * | |
1793 | * Immediately put all linked substreams into SETUP state. | |
1794 | */ | |
877211f5 | 1795 | static int snd_pcm_drop(struct snd_pcm_substream *substream) |
1da177e4 | 1796 | { |
877211f5 | 1797 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
1798 | int result = 0; |
1799 | ||
7eaa943c TI |
1800 | if (PCM_RUNTIME_CHECK(substream)) |
1801 | return -ENXIO; | |
1da177e4 | 1802 | runtime = substream->runtime; |
1da177e4 | 1803 | |
de1b8b93 | 1804 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN || |
24e8fc49 TI |
1805 | runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED || |
1806 | runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) | |
1da177e4 LT |
1807 | return -EBADFD; |
1808 | ||
1da177e4 LT |
1809 | snd_pcm_stream_lock_irq(substream); |
1810 | /* resume pause */ | |
1811 | if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) | |
1812 | snd_pcm_pause(substream, 0); | |
1813 | ||
1814 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); | |
1815 | /* runtime->control->appl_ptr = runtime->status->hw_ptr; */ | |
1816 | snd_pcm_stream_unlock_irq(substream); | |
24e8fc49 | 1817 | |
1da177e4 LT |
1818 | return result; |
1819 | } | |
1820 | ||
1821 | ||
0888c321 | 1822 | static bool is_pcm_file(struct file *file) |
1da177e4 | 1823 | { |
0888c321 | 1824 | struct inode *inode = file_inode(file); |
f87135f5 CL |
1825 | unsigned int minor; |
1826 | ||
0888c321 AV |
1827 | if (!S_ISCHR(inode->i_mode) || imajor(inode) != snd_major) |
1828 | return false; | |
1da177e4 | 1829 | minor = iminor(inode); |
0888c321 AV |
1830 | return snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) || |
1831 | snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE); | |
1da177e4 LT |
1832 | } |
1833 | ||
1834 | /* | |
1835 | * PCM link handling | |
1836 | */ | |
877211f5 | 1837 | static int snd_pcm_link(struct snd_pcm_substream *substream, int fd) |
1da177e4 LT |
1838 | { |
1839 | int res = 0; | |
877211f5 TI |
1840 | struct snd_pcm_file *pcm_file; |
1841 | struct snd_pcm_substream *substream1; | |
1662591b | 1842 | struct snd_pcm_group *group; |
0888c321 | 1843 | struct fd f = fdget(fd); |
1da177e4 | 1844 | |
0888c321 | 1845 | if (!f.file) |
1da177e4 | 1846 | return -EBADFD; |
0888c321 AV |
1847 | if (!is_pcm_file(f.file)) { |
1848 | res = -EBADFD; | |
1849 | goto _badf; | |
1850 | } | |
1851 | pcm_file = f.file->private_data; | |
1da177e4 | 1852 | substream1 = pcm_file->substream; |
1662591b TI |
1853 | group = kmalloc(sizeof(*group), GFP_KERNEL); |
1854 | if (!group) { | |
1855 | res = -ENOMEM; | |
1856 | goto _nolock; | |
1857 | } | |
67ec1072 | 1858 | down_write_nonblock(&snd_pcm_link_rwsem); |
1da177e4 LT |
1859 | write_lock_irq(&snd_pcm_link_rwlock); |
1860 | if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN || | |
257f8cce TI |
1861 | substream->runtime->status->state != substream1->runtime->status->state || |
1862 | substream->pcm->nonatomic != substream1->pcm->nonatomic) { | |
1da177e4 LT |
1863 | res = -EBADFD; |
1864 | goto _end; | |
1865 | } | |
1866 | if (snd_pcm_stream_linked(substream1)) { | |
1867 | res = -EALREADY; | |
1868 | goto _end; | |
1869 | } | |
1870 | if (!snd_pcm_stream_linked(substream)) { | |
1662591b | 1871 | substream->group = group; |
dd6c5cd8 | 1872 | group = NULL; |
1da177e4 | 1873 | spin_lock_init(&substream->group->lock); |
257f8cce | 1874 | mutex_init(&substream->group->mutex); |
1da177e4 LT |
1875 | INIT_LIST_HEAD(&substream->group->substreams); |
1876 | list_add_tail(&substream->link_list, &substream->group->substreams); | |
1877 | substream->group->count = 1; | |
1878 | } | |
1879 | list_add_tail(&substream1->link_list, &substream->group->substreams); | |
1880 | substream->group->count++; | |
1881 | substream1->group = substream->group; | |
1882 | _end: | |
1883 | write_unlock_irq(&snd_pcm_link_rwlock); | |
1884 | up_write(&snd_pcm_link_rwsem); | |
1662591b | 1885 | _nolock: |
a0830dbd | 1886 | snd_card_unref(substream1->pcm->card); |
dd6c5cd8 | 1887 | kfree(group); |
0888c321 AV |
1888 | _badf: |
1889 | fdput(f); | |
1da177e4 LT |
1890 | return res; |
1891 | } | |
1892 | ||
877211f5 | 1893 | static void relink_to_local(struct snd_pcm_substream *substream) |
1da177e4 LT |
1894 | { |
1895 | substream->group = &substream->self_group; | |
1896 | INIT_LIST_HEAD(&substream->self_group.substreams); | |
1897 | list_add_tail(&substream->link_list, &substream->self_group.substreams); | |
1898 | } | |
1899 | ||
877211f5 | 1900 | static int snd_pcm_unlink(struct snd_pcm_substream *substream) |
1da177e4 | 1901 | { |
ef991b95 | 1902 | struct snd_pcm_substream *s; |
1da177e4 LT |
1903 | int res = 0; |
1904 | ||
67ec1072 | 1905 | down_write_nonblock(&snd_pcm_link_rwsem); |
1da177e4 LT |
1906 | write_lock_irq(&snd_pcm_link_rwlock); |
1907 | if (!snd_pcm_stream_linked(substream)) { | |
1908 | res = -EALREADY; | |
1909 | goto _end; | |
1910 | } | |
1911 | list_del(&substream->link_list); | |
1912 | substream->group->count--; | |
1913 | if (substream->group->count == 1) { /* detach the last stream, too */ | |
ef991b95 TI |
1914 | snd_pcm_group_for_each_entry(s, substream) { |
1915 | relink_to_local(s); | |
1da177e4 LT |
1916 | break; |
1917 | } | |
1918 | kfree(substream->group); | |
1919 | } | |
1920 | relink_to_local(substream); | |
1921 | _end: | |
1922 | write_unlock_irq(&snd_pcm_link_rwlock); | |
1923 | up_write(&snd_pcm_link_rwsem); | |
1924 | return res; | |
1925 | } | |
1926 | ||
1927 | /* | |
1928 | * hw configurator | |
1929 | */ | |
877211f5 TI |
1930 | static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params, |
1931 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1932 | { |
877211f5 | 1933 | struct snd_interval t; |
1da177e4 LT |
1934 | snd_interval_mul(hw_param_interval_c(params, rule->deps[0]), |
1935 | hw_param_interval_c(params, rule->deps[1]), &t); | |
1936 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
1937 | } | |
1938 | ||
877211f5 TI |
1939 | static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params, |
1940 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1941 | { |
877211f5 | 1942 | struct snd_interval t; |
1da177e4 LT |
1943 | snd_interval_div(hw_param_interval_c(params, rule->deps[0]), |
1944 | hw_param_interval_c(params, rule->deps[1]), &t); | |
1945 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
1946 | } | |
1947 | ||
877211f5 TI |
1948 | static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params, |
1949 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1950 | { |
877211f5 | 1951 | struct snd_interval t; |
1da177e4 LT |
1952 | snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]), |
1953 | hw_param_interval_c(params, rule->deps[1]), | |
1954 | (unsigned long) rule->private, &t); | |
1955 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
1956 | } | |
1957 | ||
877211f5 TI |
1958 | static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params, |
1959 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1960 | { |
877211f5 | 1961 | struct snd_interval t; |
1da177e4 LT |
1962 | snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]), |
1963 | (unsigned long) rule->private, | |
1964 | hw_param_interval_c(params, rule->deps[1]), &t); | |
1965 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
1966 | } | |
1967 | ||
877211f5 TI |
1968 | static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params, |
1969 | struct snd_pcm_hw_rule *rule) | |
1da177e4 LT |
1970 | { |
1971 | unsigned int k; | |
b55f9fdc TS |
1972 | const struct snd_interval *i = |
1973 | hw_param_interval_c(params, rule->deps[0]); | |
877211f5 TI |
1974 | struct snd_mask m; |
1975 | struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); | |
1da177e4 LT |
1976 | snd_mask_any(&m); |
1977 | for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { | |
1978 | int bits; | |
1979 | if (! snd_mask_test(mask, k)) | |
1980 | continue; | |
1981 | bits = snd_pcm_format_physical_width(k); | |
1982 | if (bits <= 0) | |
1983 | continue; /* ignore invalid formats */ | |
1984 | if ((unsigned)bits < i->min || (unsigned)bits > i->max) | |
1985 | snd_mask_reset(&m, k); | |
1986 | } | |
1987 | return snd_mask_refine(mask, &m); | |
1988 | } | |
1989 | ||
877211f5 TI |
1990 | static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params, |
1991 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1992 | { |
877211f5 | 1993 | struct snd_interval t; |
1da177e4 LT |
1994 | unsigned int k; |
1995 | t.min = UINT_MAX; | |
1996 | t.max = 0; | |
1997 | t.openmin = 0; | |
1998 | t.openmax = 0; | |
1999 | for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { | |
2000 | int bits; | |
2001 | if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k)) | |
2002 | continue; | |
2003 | bits = snd_pcm_format_physical_width(k); | |
2004 | if (bits <= 0) | |
2005 | continue; /* ignore invalid formats */ | |
2006 | if (t.min > (unsigned)bits) | |
2007 | t.min = bits; | |
2008 | if (t.max < (unsigned)bits) | |
2009 | t.max = bits; | |
2010 | } | |
2011 | t.integer = 1; | |
2012 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
2013 | } | |
2014 | ||
2015 | #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12 | |
2016 | #error "Change this table" | |
2017 | #endif | |
2018 | ||
8b674308 TS |
2019 | static const unsigned int rates[] = { |
2020 | 5512, 8000, 11025, 16000, 22050, 32000, 44100, | |
2021 | 48000, 64000, 88200, 96000, 176400, 192000 | |
2022 | }; | |
1da177e4 | 2023 | |
7653d557 CL |
2024 | const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = { |
2025 | .count = ARRAY_SIZE(rates), | |
2026 | .list = rates, | |
2027 | }; | |
2028 | ||
877211f5 TI |
2029 | static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params, |
2030 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 2031 | { |
877211f5 | 2032 | struct snd_pcm_hardware *hw = rule->private; |
1da177e4 | 2033 | return snd_interval_list(hw_param_interval(params, rule->var), |
7653d557 CL |
2034 | snd_pcm_known_rates.count, |
2035 | snd_pcm_known_rates.list, hw->rates); | |
1da177e4 LT |
2036 | } |
2037 | ||
877211f5 TI |
2038 | static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params, |
2039 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 2040 | { |
877211f5 TI |
2041 | struct snd_interval t; |
2042 | struct snd_pcm_substream *substream = rule->private; | |
1da177e4 LT |
2043 | t.min = 0; |
2044 | t.max = substream->buffer_bytes_max; | |
2045 | t.openmin = 0; | |
2046 | t.openmax = 0; | |
2047 | t.integer = 1; | |
2048 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
2049 | } | |
2050 | ||
877211f5 | 2051 | int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream) |
1da177e4 | 2052 | { |
877211f5 TI |
2053 | struct snd_pcm_runtime *runtime = substream->runtime; |
2054 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; | |
1da177e4 LT |
2055 | int k, err; |
2056 | ||
2057 | for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { | |
2058 | snd_mask_any(constrs_mask(constrs, k)); | |
2059 | } | |
2060 | ||
2061 | for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { | |
2062 | snd_interval_any(constrs_interval(constrs, k)); | |
2063 | } | |
2064 | ||
2065 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS)); | |
2066 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)); | |
2067 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)); | |
2068 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)); | |
2069 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS)); | |
2070 | ||
2071 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, | |
2072 | snd_pcm_hw_rule_format, NULL, | |
2073 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
2074 | if (err < 0) | |
2075 | return err; | |
2076 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, | |
2077 | snd_pcm_hw_rule_sample_bits, NULL, | |
2078 | SNDRV_PCM_HW_PARAM_FORMAT, | |
2079 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
2080 | if (err < 0) | |
2081 | return err; | |
2082 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, | |
2083 | snd_pcm_hw_rule_div, NULL, | |
2084 | SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); | |
2085 | if (err < 0) | |
2086 | return err; | |
2087 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, | |
2088 | snd_pcm_hw_rule_mul, NULL, | |
2089 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); | |
2090 | if (err < 0) | |
2091 | return err; | |
2092 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, | |
2093 | snd_pcm_hw_rule_mulkdiv, (void*) 8, | |
2094 | SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); | |
2095 | if (err < 0) | |
2096 | return err; | |
2097 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, | |
2098 | snd_pcm_hw_rule_mulkdiv, (void*) 8, | |
2099 | SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1); | |
2100 | if (err < 0) | |
2101 | return err; | |
2102 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, | |
2103 | snd_pcm_hw_rule_div, NULL, | |
2104 | SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
2105 | if (err < 0) | |
2106 | return err; | |
2107 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, | |
2108 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, | |
2109 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1); | |
2110 | if (err < 0) | |
2111 | return err; | |
2112 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, | |
2113 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, | |
2114 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1); | |
2115 | if (err < 0) | |
2116 | return err; | |
2117 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, | |
2118 | snd_pcm_hw_rule_div, NULL, | |
2119 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); | |
2120 | if (err < 0) | |
2121 | return err; | |
2122 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, | |
2123 | snd_pcm_hw_rule_div, NULL, | |
2124 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); | |
2125 | if (err < 0) | |
2126 | return err; | |
2127 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, | |
2128 | snd_pcm_hw_rule_mulkdiv, (void*) 8, | |
2129 | SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); | |
2130 | if (err < 0) | |
2131 | return err; | |
2132 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, | |
2133 | snd_pcm_hw_rule_muldivk, (void*) 1000000, | |
2134 | SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); | |
2135 | if (err < 0) | |
2136 | return err; | |
2137 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
2138 | snd_pcm_hw_rule_mul, NULL, | |
2139 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); | |
2140 | if (err < 0) | |
2141 | return err; | |
2142 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
2143 | snd_pcm_hw_rule_mulkdiv, (void*) 8, | |
2144 | SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); | |
2145 | if (err < 0) | |
2146 | return err; | |
2147 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
2148 | snd_pcm_hw_rule_muldivk, (void*) 1000000, | |
2149 | SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); | |
2150 | if (err < 0) | |
2151 | return err; | |
2152 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, | |
2153 | snd_pcm_hw_rule_muldivk, (void*) 8, | |
2154 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); | |
2155 | if (err < 0) | |
2156 | return err; | |
2157 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, | |
2158 | snd_pcm_hw_rule_muldivk, (void*) 8, | |
2159 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); | |
2160 | if (err < 0) | |
2161 | return err; | |
2162 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME, | |
2163 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, | |
2164 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); | |
2165 | if (err < 0) | |
2166 | return err; | |
2167 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME, | |
2168 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, | |
2169 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); | |
2170 | if (err < 0) | |
2171 | return err; | |
2172 | return 0; | |
2173 | } | |
2174 | ||
877211f5 | 2175 | int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream) |
1da177e4 | 2176 | { |
877211f5 TI |
2177 | struct snd_pcm_runtime *runtime = substream->runtime; |
2178 | struct snd_pcm_hardware *hw = &runtime->hw; | |
1da177e4 LT |
2179 | int err; |
2180 | unsigned int mask = 0; | |
2181 | ||
2182 | if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) | |
2183 | mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED; | |
2184 | if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) | |
2185 | mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED; | |
63825f3a | 2186 | if (hw_support_mmap(substream)) { |
1da177e4 LT |
2187 | if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) |
2188 | mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; | |
2189 | if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) | |
2190 | mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED; | |
2191 | if (hw->info & SNDRV_PCM_INFO_COMPLEX) | |
2192 | mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX; | |
2193 | } | |
2194 | err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask); | |
7eaa943c TI |
2195 | if (err < 0) |
2196 | return err; | |
1da177e4 LT |
2197 | |
2198 | err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats); | |
7eaa943c TI |
2199 | if (err < 0) |
2200 | return err; | |
1da177e4 LT |
2201 | |
2202 | err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD); | |
7eaa943c TI |
2203 | if (err < 0) |
2204 | return err; | |
1da177e4 LT |
2205 | |
2206 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, | |
2207 | hw->channels_min, hw->channels_max); | |
7eaa943c TI |
2208 | if (err < 0) |
2209 | return err; | |
1da177e4 LT |
2210 | |
2211 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE, | |
2212 | hw->rate_min, hw->rate_max); | |
8b90ca08 GL |
2213 | if (err < 0) |
2214 | return err; | |
1da177e4 LT |
2215 | |
2216 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, | |
2217 | hw->period_bytes_min, hw->period_bytes_max); | |
8b90ca08 GL |
2218 | if (err < 0) |
2219 | return err; | |
1da177e4 LT |
2220 | |
2221 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS, | |
2222 | hw->periods_min, hw->periods_max); | |
7eaa943c TI |
2223 | if (err < 0) |
2224 | return err; | |
1da177e4 LT |
2225 | |
2226 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, | |
2227 | hw->period_bytes_min, hw->buffer_bytes_max); | |
7eaa943c TI |
2228 | if (err < 0) |
2229 | return err; | |
1da177e4 LT |
2230 | |
2231 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, | |
2232 | snd_pcm_hw_rule_buffer_bytes_max, substream, | |
2233 | SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1); | |
2234 | if (err < 0) | |
2235 | return err; | |
2236 | ||
2237 | /* FIXME: remove */ | |
2238 | if (runtime->dma_bytes) { | |
2239 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes); | |
7eaa943c | 2240 | if (err < 0) |
6cf95152 | 2241 | return err; |
1da177e4 LT |
2242 | } |
2243 | ||
2244 | if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) { | |
2245 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, | |
2246 | snd_pcm_hw_rule_rate, hw, | |
2247 | SNDRV_PCM_HW_PARAM_RATE, -1); | |
2248 | if (err < 0) | |
2249 | return err; | |
2250 | } | |
2251 | ||
2252 | /* FIXME: this belong to lowlevel */ | |
1da177e4 LT |
2253 | snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE); |
2254 | ||
2255 | return 0; | |
2256 | } | |
2257 | ||
3bf75f9b | 2258 | static void pcm_release_private(struct snd_pcm_substream *substream) |
1da177e4 | 2259 | { |
1da177e4 | 2260 | snd_pcm_unlink(substream); |
3bf75f9b TI |
2261 | } |
2262 | ||
2263 | void snd_pcm_release_substream(struct snd_pcm_substream *substream) | |
2264 | { | |
0df63e44 TI |
2265 | substream->ref_count--; |
2266 | if (substream->ref_count > 0) | |
2267 | return; | |
2268 | ||
3bf75f9b | 2269 | snd_pcm_drop(substream); |
3bf75f9b | 2270 | if (substream->hw_opened) { |
094435d4 TI |
2271 | if (substream->ops->hw_free && |
2272 | substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) | |
1da177e4 LT |
2273 | substream->ops->hw_free(substream); |
2274 | substream->ops->close(substream); | |
3bf75f9b | 2275 | substream->hw_opened = 0; |
1da177e4 | 2276 | } |
8699a0b6 TI |
2277 | if (pm_qos_request_active(&substream->latency_pm_qos_req)) |
2278 | pm_qos_remove_request(&substream->latency_pm_qos_req); | |
1576274d TI |
2279 | if (substream->pcm_release) { |
2280 | substream->pcm_release(substream); | |
2281 | substream->pcm_release = NULL; | |
2282 | } | |
3bf75f9b TI |
2283 | snd_pcm_detach_substream(substream); |
2284 | } | |
2285 | ||
e88e8ae6 TI |
2286 | EXPORT_SYMBOL(snd_pcm_release_substream); |
2287 | ||
3bf75f9b TI |
2288 | int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, |
2289 | struct file *file, | |
2290 | struct snd_pcm_substream **rsubstream) | |
2291 | { | |
2292 | struct snd_pcm_substream *substream; | |
2293 | int err; | |
2294 | ||
2295 | err = snd_pcm_attach_substream(pcm, stream, file, &substream); | |
2296 | if (err < 0) | |
2297 | return err; | |
0df63e44 TI |
2298 | if (substream->ref_count > 1) { |
2299 | *rsubstream = substream; | |
2300 | return 0; | |
2301 | } | |
2302 | ||
3bf75f9b TI |
2303 | err = snd_pcm_hw_constraints_init(substream); |
2304 | if (err < 0) { | |
09e56df8 | 2305 | pcm_dbg(pcm, "snd_pcm_hw_constraints_init failed\n"); |
3bf75f9b TI |
2306 | goto error; |
2307 | } | |
2308 | ||
2309 | if ((err = substream->ops->open(substream)) < 0) | |
2310 | goto error; | |
2311 | ||
2312 | substream->hw_opened = 1; | |
2313 | ||
2314 | err = snd_pcm_hw_constraints_complete(substream); | |
2315 | if (err < 0) { | |
09e56df8 | 2316 | pcm_dbg(pcm, "snd_pcm_hw_constraints_complete failed\n"); |
3bf75f9b TI |
2317 | goto error; |
2318 | } | |
2319 | ||
2320 | *rsubstream = substream; | |
1da177e4 | 2321 | return 0; |
3bf75f9b TI |
2322 | |
2323 | error: | |
2324 | snd_pcm_release_substream(substream); | |
2325 | return err; | |
1da177e4 LT |
2326 | } |
2327 | ||
e88e8ae6 TI |
2328 | EXPORT_SYMBOL(snd_pcm_open_substream); |
2329 | ||
1da177e4 | 2330 | static int snd_pcm_open_file(struct file *file, |
877211f5 | 2331 | struct snd_pcm *pcm, |
ffd3d5c6 | 2332 | int stream) |
1da177e4 | 2333 | { |
877211f5 TI |
2334 | struct snd_pcm_file *pcm_file; |
2335 | struct snd_pcm_substream *substream; | |
3bf75f9b | 2336 | int err; |
1da177e4 | 2337 | |
3bf75f9b TI |
2338 | err = snd_pcm_open_substream(pcm, stream, file, &substream); |
2339 | if (err < 0) | |
2340 | return err; | |
2341 | ||
548a648b TI |
2342 | pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL); |
2343 | if (pcm_file == NULL) { | |
2344 | snd_pcm_release_substream(substream); | |
2345 | return -ENOMEM; | |
2346 | } | |
2347 | pcm_file->substream = substream; | |
2348 | if (substream->ref_count == 1) { | |
0df63e44 TI |
2349 | substream->file = pcm_file; |
2350 | substream->pcm_release = pcm_release_private; | |
1da177e4 | 2351 | } |
1da177e4 | 2352 | file->private_data = pcm_file; |
ffd3d5c6 | 2353 | |
1da177e4 LT |
2354 | return 0; |
2355 | } | |
2356 | ||
f87135f5 CL |
2357 | static int snd_pcm_playback_open(struct inode *inode, struct file *file) |
2358 | { | |
2359 | struct snd_pcm *pcm; | |
02f4865f TI |
2360 | int err = nonseekable_open(inode, file); |
2361 | if (err < 0) | |
2362 | return err; | |
f87135f5 CL |
2363 | pcm = snd_lookup_minor_data(iminor(inode), |
2364 | SNDRV_DEVICE_TYPE_PCM_PLAYBACK); | |
a0830dbd | 2365 | err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK); |
8bb4d9ce TI |
2366 | if (pcm) |
2367 | snd_card_unref(pcm->card); | |
a0830dbd | 2368 | return err; |
f87135f5 CL |
2369 | } |
2370 | ||
2371 | static int snd_pcm_capture_open(struct inode *inode, struct file *file) | |
1da177e4 | 2372 | { |
877211f5 | 2373 | struct snd_pcm *pcm; |
02f4865f TI |
2374 | int err = nonseekable_open(inode, file); |
2375 | if (err < 0) | |
2376 | return err; | |
f87135f5 CL |
2377 | pcm = snd_lookup_minor_data(iminor(inode), |
2378 | SNDRV_DEVICE_TYPE_PCM_CAPTURE); | |
a0830dbd | 2379 | err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE); |
8bb4d9ce TI |
2380 | if (pcm) |
2381 | snd_card_unref(pcm->card); | |
a0830dbd | 2382 | return err; |
f87135f5 CL |
2383 | } |
2384 | ||
2385 | static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream) | |
2386 | { | |
2387 | int err; | |
1da177e4 LT |
2388 | wait_queue_t wait; |
2389 | ||
1da177e4 LT |
2390 | if (pcm == NULL) { |
2391 | err = -ENODEV; | |
2392 | goto __error1; | |
2393 | } | |
2394 | err = snd_card_file_add(pcm->card, file); | |
2395 | if (err < 0) | |
2396 | goto __error1; | |
2397 | if (!try_module_get(pcm->card->module)) { | |
2398 | err = -EFAULT; | |
2399 | goto __error2; | |
2400 | } | |
2401 | init_waitqueue_entry(&wait, current); | |
2402 | add_wait_queue(&pcm->open_wait, &wait); | |
1a60d4c5 | 2403 | mutex_lock(&pcm->open_mutex); |
1da177e4 | 2404 | while (1) { |
ffd3d5c6 | 2405 | err = snd_pcm_open_file(file, pcm, stream); |
1da177e4 LT |
2406 | if (err >= 0) |
2407 | break; | |
2408 | if (err == -EAGAIN) { | |
2409 | if (file->f_flags & O_NONBLOCK) { | |
2410 | err = -EBUSY; | |
2411 | break; | |
2412 | } | |
2413 | } else | |
2414 | break; | |
2415 | set_current_state(TASK_INTERRUPTIBLE); | |
1a60d4c5 | 2416 | mutex_unlock(&pcm->open_mutex); |
1da177e4 | 2417 | schedule(); |
1a60d4c5 | 2418 | mutex_lock(&pcm->open_mutex); |
0914f796 TI |
2419 | if (pcm->card->shutdown) { |
2420 | err = -ENODEV; | |
2421 | break; | |
2422 | } | |
1da177e4 LT |
2423 | if (signal_pending(current)) { |
2424 | err = -ERESTARTSYS; | |
2425 | break; | |
2426 | } | |
2427 | } | |
2428 | remove_wait_queue(&pcm->open_wait, &wait); | |
1a60d4c5 | 2429 | mutex_unlock(&pcm->open_mutex); |
1da177e4 LT |
2430 | if (err < 0) |
2431 | goto __error; | |
2432 | return err; | |
2433 | ||
2434 | __error: | |
2435 | module_put(pcm->card->module); | |
2436 | __error2: | |
2437 | snd_card_file_remove(pcm->card, file); | |
2438 | __error1: | |
2439 | return err; | |
2440 | } | |
2441 | ||
2442 | static int snd_pcm_release(struct inode *inode, struct file *file) | |
2443 | { | |
877211f5 TI |
2444 | struct snd_pcm *pcm; |
2445 | struct snd_pcm_substream *substream; | |
2446 | struct snd_pcm_file *pcm_file; | |
1da177e4 LT |
2447 | |
2448 | pcm_file = file->private_data; | |
2449 | substream = pcm_file->substream; | |
7eaa943c TI |
2450 | if (snd_BUG_ON(!substream)) |
2451 | return -ENXIO; | |
1da177e4 | 2452 | pcm = substream->pcm; |
1a60d4c5 | 2453 | mutex_lock(&pcm->open_mutex); |
3bf75f9b | 2454 | snd_pcm_release_substream(substream); |
548a648b | 2455 | kfree(pcm_file); |
1a60d4c5 | 2456 | mutex_unlock(&pcm->open_mutex); |
1da177e4 LT |
2457 | wake_up(&pcm->open_wait); |
2458 | module_put(pcm->card->module); | |
2459 | snd_card_file_remove(pcm->card, file); | |
2460 | return 0; | |
2461 | } | |
2462 | ||
f839cc1c TI |
2463 | /* check and update PCM state; return 0 or a negative error |
2464 | * call this inside PCM lock | |
2465 | */ | |
2466 | static int do_pcm_hwsync(struct snd_pcm_substream *substream) | |
2467 | { | |
2468 | switch (substream->runtime->status->state) { | |
2469 | case SNDRV_PCM_STATE_DRAINING: | |
2470 | if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) | |
2471 | return -EBADFD; | |
2472 | /* Fall through */ | |
2473 | case SNDRV_PCM_STATE_RUNNING: | |
2474 | return snd_pcm_update_hw_ptr(substream); | |
2475 | case SNDRV_PCM_STATE_PREPARED: | |
2476 | case SNDRV_PCM_STATE_PAUSED: | |
2477 | return 0; | |
2478 | case SNDRV_PCM_STATE_SUSPENDED: | |
2479 | return -ESTRPIPE; | |
2480 | case SNDRV_PCM_STATE_XRUN: | |
2481 | return -EPIPE; | |
2482 | default: | |
2483 | return -EBADFD; | |
2484 | } | |
2485 | } | |
2486 | ||
9027c463 TI |
2487 | /* update to the given appl_ptr and call ack callback if needed; |
2488 | * when an error is returned, take back to the original value | |
2489 | */ | |
2490 | static int apply_appl_ptr(struct snd_pcm_substream *substream, | |
2491 | snd_pcm_uframes_t appl_ptr) | |
2492 | { | |
2493 | struct snd_pcm_runtime *runtime = substream->runtime; | |
2494 | snd_pcm_uframes_t old_appl_ptr = runtime->control->appl_ptr; | |
2495 | int ret; | |
2496 | ||
2497 | runtime->control->appl_ptr = appl_ptr; | |
2498 | if (substream->ops->ack) { | |
2499 | ret = substream->ops->ack(substream); | |
2500 | if (ret < 0) { | |
2501 | runtime->control->appl_ptr = old_appl_ptr; | |
2502 | return ret; | |
2503 | } | |
2504 | } | |
2505 | return 0; | |
2506 | } | |
2507 | ||
2508 | /* increase the appl_ptr; returns the processed frames or a negative error */ | |
e0327a0f TI |
2509 | static snd_pcm_sframes_t forward_appl_ptr(struct snd_pcm_substream *substream, |
2510 | snd_pcm_uframes_t frames, | |
2511 | snd_pcm_sframes_t avail) | |
2512 | { | |
2513 | struct snd_pcm_runtime *runtime = substream->runtime; | |
2514 | snd_pcm_sframes_t appl_ptr; | |
9027c463 | 2515 | int ret; |
e0327a0f TI |
2516 | |
2517 | if (avail <= 0) | |
2518 | return 0; | |
2519 | if (frames > (snd_pcm_uframes_t)avail) | |
2520 | frames = avail; | |
2521 | appl_ptr = runtime->control->appl_ptr + frames; | |
2522 | if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) | |
2523 | appl_ptr -= runtime->boundary; | |
9027c463 TI |
2524 | ret = apply_appl_ptr(substream, appl_ptr); |
2525 | return ret < 0 ? ret : frames; | |
e0327a0f TI |
2526 | } |
2527 | ||
9027c463 | 2528 | /* decrease the appl_ptr; returns the processed frames or a negative error */ |
e0327a0f TI |
2529 | static snd_pcm_sframes_t rewind_appl_ptr(struct snd_pcm_substream *substream, |
2530 | snd_pcm_uframes_t frames, | |
2531 | snd_pcm_sframes_t avail) | |
2532 | { | |
2533 | struct snd_pcm_runtime *runtime = substream->runtime; | |
2534 | snd_pcm_sframes_t appl_ptr; | |
9027c463 | 2535 | int ret; |
e0327a0f TI |
2536 | |
2537 | if (avail <= 0) | |
2538 | return 0; | |
2539 | if (frames > (snd_pcm_uframes_t)avail) | |
2540 | frames = avail; | |
2541 | appl_ptr = runtime->control->appl_ptr - frames; | |
2542 | if (appl_ptr < 0) | |
2543 | appl_ptr += runtime->boundary; | |
9027c463 TI |
2544 | ret = apply_appl_ptr(substream, appl_ptr); |
2545 | return ret < 0 ? ret : frames; | |
e0327a0f TI |
2546 | } |
2547 | ||
877211f5 TI |
2548 | static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream, |
2549 | snd_pcm_uframes_t frames) | |
1da177e4 | 2550 | { |
877211f5 | 2551 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 2552 | snd_pcm_sframes_t ret; |
1da177e4 LT |
2553 | |
2554 | if (frames == 0) | |
2555 | return 0; | |
2556 | ||
2557 | snd_pcm_stream_lock_irq(substream); | |
f839cc1c | 2558 | ret = do_pcm_hwsync(substream); |
e0327a0f TI |
2559 | if (!ret) |
2560 | ret = rewind_appl_ptr(substream, frames, | |
2561 | snd_pcm_playback_hw_avail(runtime)); | |
1da177e4 LT |
2562 | snd_pcm_stream_unlock_irq(substream); |
2563 | return ret; | |
2564 | } | |
2565 | ||
877211f5 TI |
2566 | static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream, |
2567 | snd_pcm_uframes_t frames) | |
1da177e4 | 2568 | { |
877211f5 | 2569 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 2570 | snd_pcm_sframes_t ret; |
1da177e4 LT |
2571 | |
2572 | if (frames == 0) | |
2573 | return 0; | |
2574 | ||
2575 | snd_pcm_stream_lock_irq(substream); | |
f839cc1c | 2576 | ret = do_pcm_hwsync(substream); |
e0327a0f TI |
2577 | if (!ret) |
2578 | ret = rewind_appl_ptr(substream, frames, | |
2579 | snd_pcm_capture_hw_avail(runtime)); | |
1da177e4 LT |
2580 | snd_pcm_stream_unlock_irq(substream); |
2581 | return ret; | |
2582 | } | |
2583 | ||
877211f5 TI |
2584 | static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream, |
2585 | snd_pcm_uframes_t frames) | |
1da177e4 | 2586 | { |
877211f5 | 2587 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 2588 | snd_pcm_sframes_t ret; |
1da177e4 LT |
2589 | |
2590 | if (frames == 0) | |
2591 | return 0; | |
2592 | ||
2593 | snd_pcm_stream_lock_irq(substream); | |
f839cc1c | 2594 | ret = do_pcm_hwsync(substream); |
e0327a0f TI |
2595 | if (!ret) |
2596 | ret = forward_appl_ptr(substream, frames, | |
2597 | snd_pcm_playback_avail(runtime)); | |
1da177e4 LT |
2598 | snd_pcm_stream_unlock_irq(substream); |
2599 | return ret; | |
2600 | } | |
2601 | ||
877211f5 TI |
2602 | static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream, |
2603 | snd_pcm_uframes_t frames) | |
1da177e4 | 2604 | { |
877211f5 | 2605 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 2606 | snd_pcm_sframes_t ret; |
1da177e4 LT |
2607 | |
2608 | if (frames == 0) | |
2609 | return 0; | |
2610 | ||
2611 | snd_pcm_stream_lock_irq(substream); | |
f839cc1c | 2612 | ret = do_pcm_hwsync(substream); |
e0327a0f TI |
2613 | if (!ret) |
2614 | ret = forward_appl_ptr(substream, frames, | |
2615 | snd_pcm_capture_avail(runtime)); | |
1da177e4 LT |
2616 | snd_pcm_stream_unlock_irq(substream); |
2617 | return ret; | |
2618 | } | |
2619 | ||
877211f5 | 2620 | static int snd_pcm_hwsync(struct snd_pcm_substream *substream) |
1da177e4 | 2621 | { |
1da177e4 LT |
2622 | int err; |
2623 | ||
2624 | snd_pcm_stream_lock_irq(substream); | |
f839cc1c | 2625 | err = do_pcm_hwsync(substream); |
1da177e4 LT |
2626 | snd_pcm_stream_unlock_irq(substream); |
2627 | return err; | |
2628 | } | |
2629 | ||
c2c86a97 | 2630 | static snd_pcm_sframes_t snd_pcm_delay(struct snd_pcm_substream *substream) |
1da177e4 | 2631 | { |
877211f5 | 2632 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2633 | int err; |
2634 | snd_pcm_sframes_t n = 0; | |
2635 | ||
2636 | snd_pcm_stream_lock_irq(substream); | |
f839cc1c TI |
2637 | err = do_pcm_hwsync(substream); |
2638 | if (!err) { | |
1da177e4 LT |
2639 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
2640 | n = snd_pcm_playback_hw_avail(runtime); | |
2641 | else | |
2642 | n = snd_pcm_capture_avail(runtime); | |
4bbe1ddf | 2643 | n += runtime->delay; |
1da177e4 LT |
2644 | } |
2645 | snd_pcm_stream_unlock_irq(substream); | |
c2c86a97 | 2646 | return err < 0 ? err : n; |
1da177e4 LT |
2647 | } |
2648 | ||
877211f5 TI |
2649 | static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream, |
2650 | struct snd_pcm_sync_ptr __user *_sync_ptr) | |
1da177e4 | 2651 | { |
877211f5 TI |
2652 | struct snd_pcm_runtime *runtime = substream->runtime; |
2653 | struct snd_pcm_sync_ptr sync_ptr; | |
2654 | volatile struct snd_pcm_mmap_status *status; | |
2655 | volatile struct snd_pcm_mmap_control *control; | |
1da177e4 LT |
2656 | int err; |
2657 | ||
2658 | memset(&sync_ptr, 0, sizeof(sync_ptr)); | |
2659 | if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags))) | |
2660 | return -EFAULT; | |
877211f5 | 2661 | if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control))) |
1da177e4 LT |
2662 | return -EFAULT; |
2663 | status = runtime->status; | |
2664 | control = runtime->control; | |
2665 | if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) { | |
2666 | err = snd_pcm_hwsync(substream); | |
2667 | if (err < 0) | |
2668 | return err; | |
2669 | } | |
2670 | snd_pcm_stream_lock_irq(substream); | |
9027c463 TI |
2671 | if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) { |
2672 | err = apply_appl_ptr(substream, sync_ptr.c.control.appl_ptr); | |
2673 | if (err < 0) { | |
2674 | snd_pcm_stream_unlock_irq(substream); | |
2675 | return err; | |
2676 | } | |
2677 | } else { | |
1da177e4 | 2678 | sync_ptr.c.control.appl_ptr = control->appl_ptr; |
9027c463 | 2679 | } |
1da177e4 LT |
2680 | if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) |
2681 | control->avail_min = sync_ptr.c.control.avail_min; | |
2682 | else | |
2683 | sync_ptr.c.control.avail_min = control->avail_min; | |
2684 | sync_ptr.s.status.state = status->state; | |
2685 | sync_ptr.s.status.hw_ptr = status->hw_ptr; | |
2686 | sync_ptr.s.status.tstamp = status->tstamp; | |
2687 | sync_ptr.s.status.suspended_state = status->suspended_state; | |
2688 | snd_pcm_stream_unlock_irq(substream); | |
2689 | if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr))) | |
2690 | return -EFAULT; | |
2691 | return 0; | |
2692 | } | |
b751eef1 JK |
2693 | |
2694 | static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg) | |
2695 | { | |
2696 | struct snd_pcm_runtime *runtime = substream->runtime; | |
2697 | int arg; | |
2698 | ||
2699 | if (get_user(arg, _arg)) | |
2700 | return -EFAULT; | |
2701 | if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST) | |
2702 | return -EINVAL; | |
2408c219 | 2703 | runtime->tstamp_type = arg; |
b751eef1 JK |
2704 | return 0; |
2705 | } | |
1da177e4 | 2706 | |
0df63e44 TI |
2707 | static int snd_pcm_common_ioctl1(struct file *file, |
2708 | struct snd_pcm_substream *substream, | |
1da177e4 LT |
2709 | unsigned int cmd, void __user *arg) |
2710 | { | |
1da177e4 LT |
2711 | switch (cmd) { |
2712 | case SNDRV_PCM_IOCTL_PVERSION: | |
2713 | return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0; | |
2714 | case SNDRV_PCM_IOCTL_INFO: | |
2715 | return snd_pcm_info_user(substream, arg); | |
28e9e473 JK |
2716 | case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */ |
2717 | return 0; | |
b751eef1 JK |
2718 | case SNDRV_PCM_IOCTL_TTSTAMP: |
2719 | return snd_pcm_tstamp(substream, arg); | |
1da177e4 LT |
2720 | case SNDRV_PCM_IOCTL_HW_REFINE: |
2721 | return snd_pcm_hw_refine_user(substream, arg); | |
2722 | case SNDRV_PCM_IOCTL_HW_PARAMS: | |
2723 | return snd_pcm_hw_params_user(substream, arg); | |
2724 | case SNDRV_PCM_IOCTL_HW_FREE: | |
2725 | return snd_pcm_hw_free(substream); | |
2726 | case SNDRV_PCM_IOCTL_SW_PARAMS: | |
2727 | return snd_pcm_sw_params_user(substream, arg); | |
2728 | case SNDRV_PCM_IOCTL_STATUS: | |
38ca2a4d PLB |
2729 | return snd_pcm_status_user(substream, arg, false); |
2730 | case SNDRV_PCM_IOCTL_STATUS_EXT: | |
2731 | return snd_pcm_status_user(substream, arg, true); | |
1da177e4 LT |
2732 | case SNDRV_PCM_IOCTL_CHANNEL_INFO: |
2733 | return snd_pcm_channel_info_user(substream, arg); | |
2734 | case SNDRV_PCM_IOCTL_PREPARE: | |
0df63e44 | 2735 | return snd_pcm_prepare(substream, file); |
1da177e4 LT |
2736 | case SNDRV_PCM_IOCTL_RESET: |
2737 | return snd_pcm_reset(substream); | |
2738 | case SNDRV_PCM_IOCTL_START: | |
c2c86a97 | 2739 | return snd_pcm_start_lock_irq(substream); |
1da177e4 LT |
2740 | case SNDRV_PCM_IOCTL_LINK: |
2741 | return snd_pcm_link(substream, (int)(unsigned long) arg); | |
2742 | case SNDRV_PCM_IOCTL_UNLINK: | |
2743 | return snd_pcm_unlink(substream); | |
2744 | case SNDRV_PCM_IOCTL_RESUME: | |
2745 | return snd_pcm_resume(substream); | |
2746 | case SNDRV_PCM_IOCTL_XRUN: | |
2747 | return snd_pcm_xrun(substream); | |
2748 | case SNDRV_PCM_IOCTL_HWSYNC: | |
2749 | return snd_pcm_hwsync(substream); | |
2750 | case SNDRV_PCM_IOCTL_DELAY: | |
c2c86a97 TI |
2751 | { |
2752 | snd_pcm_sframes_t delay = snd_pcm_delay(substream); | |
2753 | snd_pcm_sframes_t __user *res = arg; | |
2754 | ||
2755 | if (delay < 0) | |
2756 | return delay; | |
2757 | if (put_user(delay, res)) | |
2758 | return -EFAULT; | |
2759 | return 0; | |
2760 | } | |
1da177e4 LT |
2761 | case SNDRV_PCM_IOCTL_SYNC_PTR: |
2762 | return snd_pcm_sync_ptr(substream, arg); | |
59d48582 | 2763 | #ifdef CONFIG_SND_SUPPORT_OLD_API |
1da177e4 LT |
2764 | case SNDRV_PCM_IOCTL_HW_REFINE_OLD: |
2765 | return snd_pcm_hw_refine_old_user(substream, arg); | |
2766 | case SNDRV_PCM_IOCTL_HW_PARAMS_OLD: | |
2767 | return snd_pcm_hw_params_old_user(substream, arg); | |
59d48582 | 2768 | #endif |
1da177e4 | 2769 | case SNDRV_PCM_IOCTL_DRAIN: |
4cdc115f | 2770 | return snd_pcm_drain(substream, file); |
1da177e4 LT |
2771 | case SNDRV_PCM_IOCTL_DROP: |
2772 | return snd_pcm_drop(substream); | |
e661d0dd TI |
2773 | case SNDRV_PCM_IOCTL_PAUSE: |
2774 | { | |
2775 | int res; | |
2776 | snd_pcm_stream_lock_irq(substream); | |
2777 | res = snd_pcm_pause(substream, (int)(unsigned long)arg); | |
2778 | snd_pcm_stream_unlock_irq(substream); | |
2779 | return res; | |
2780 | } | |
1da177e4 | 2781 | } |
09e56df8 | 2782 | pcm_dbg(substream->pcm, "unknown ioctl = 0x%x\n", cmd); |
1da177e4 LT |
2783 | return -ENOTTY; |
2784 | } | |
2785 | ||
0df63e44 TI |
2786 | static int snd_pcm_playback_ioctl1(struct file *file, |
2787 | struct snd_pcm_substream *substream, | |
1da177e4 LT |
2788 | unsigned int cmd, void __user *arg) |
2789 | { | |
7eaa943c TI |
2790 | if (snd_BUG_ON(!substream)) |
2791 | return -ENXIO; | |
2792 | if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) | |
2793 | return -EINVAL; | |
1da177e4 LT |
2794 | switch (cmd) { |
2795 | case SNDRV_PCM_IOCTL_WRITEI_FRAMES: | |
2796 | { | |
877211f5 TI |
2797 | struct snd_xferi xferi; |
2798 | struct snd_xferi __user *_xferi = arg; | |
2799 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
2800 | snd_pcm_sframes_t result; |
2801 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2802 | return -EBADFD; | |
2803 | if (put_user(0, &_xferi->result)) | |
2804 | return -EFAULT; | |
2805 | if (copy_from_user(&xferi, _xferi, sizeof(xferi))) | |
2806 | return -EFAULT; | |
2807 | result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames); | |
2808 | __put_user(result, &_xferi->result); | |
2809 | return result < 0 ? result : 0; | |
2810 | } | |
2811 | case SNDRV_PCM_IOCTL_WRITEN_FRAMES: | |
2812 | { | |
877211f5 TI |
2813 | struct snd_xfern xfern; |
2814 | struct snd_xfern __user *_xfern = arg; | |
2815 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
2816 | void __user **bufs; |
2817 | snd_pcm_sframes_t result; | |
2818 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2819 | return -EBADFD; | |
2820 | if (runtime->channels > 128) | |
2821 | return -EINVAL; | |
2822 | if (put_user(0, &_xfern->result)) | |
2823 | return -EFAULT; | |
2824 | if (copy_from_user(&xfern, _xfern, sizeof(xfern))) | |
2825 | return -EFAULT; | |
ef44a1ec LZ |
2826 | |
2827 | bufs = memdup_user(xfern.bufs, | |
2828 | sizeof(void *) * runtime->channels); | |
2829 | if (IS_ERR(bufs)) | |
2830 | return PTR_ERR(bufs); | |
1da177e4 LT |
2831 | result = snd_pcm_lib_writev(substream, bufs, xfern.frames); |
2832 | kfree(bufs); | |
2833 | __put_user(result, &_xfern->result); | |
2834 | return result < 0 ? result : 0; | |
2835 | } | |
2836 | case SNDRV_PCM_IOCTL_REWIND: | |
2837 | { | |
2838 | snd_pcm_uframes_t frames; | |
2839 | snd_pcm_uframes_t __user *_frames = arg; | |
2840 | snd_pcm_sframes_t result; | |
2841 | if (get_user(frames, _frames)) | |
2842 | return -EFAULT; | |
2843 | if (put_user(0, _frames)) | |
2844 | return -EFAULT; | |
2845 | result = snd_pcm_playback_rewind(substream, frames); | |
2846 | __put_user(result, _frames); | |
2847 | return result < 0 ? result : 0; | |
2848 | } | |
2849 | case SNDRV_PCM_IOCTL_FORWARD: | |
2850 | { | |
2851 | snd_pcm_uframes_t frames; | |
2852 | snd_pcm_uframes_t __user *_frames = arg; | |
2853 | snd_pcm_sframes_t result; | |
2854 | if (get_user(frames, _frames)) | |
2855 | return -EFAULT; | |
2856 | if (put_user(0, _frames)) | |
2857 | return -EFAULT; | |
2858 | result = snd_pcm_playback_forward(substream, frames); | |
2859 | __put_user(result, _frames); | |
2860 | return result < 0 ? result : 0; | |
2861 | } | |
1da177e4 | 2862 | } |
0df63e44 | 2863 | return snd_pcm_common_ioctl1(file, substream, cmd, arg); |
1da177e4 LT |
2864 | } |
2865 | ||
0df63e44 TI |
2866 | static int snd_pcm_capture_ioctl1(struct file *file, |
2867 | struct snd_pcm_substream *substream, | |
1da177e4 LT |
2868 | unsigned int cmd, void __user *arg) |
2869 | { | |
7eaa943c TI |
2870 | if (snd_BUG_ON(!substream)) |
2871 | return -ENXIO; | |
2872 | if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE)) | |
2873 | return -EINVAL; | |
1da177e4 LT |
2874 | switch (cmd) { |
2875 | case SNDRV_PCM_IOCTL_READI_FRAMES: | |
2876 | { | |
877211f5 TI |
2877 | struct snd_xferi xferi; |
2878 | struct snd_xferi __user *_xferi = arg; | |
2879 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
2880 | snd_pcm_sframes_t result; |
2881 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2882 | return -EBADFD; | |
2883 | if (put_user(0, &_xferi->result)) | |
2884 | return -EFAULT; | |
2885 | if (copy_from_user(&xferi, _xferi, sizeof(xferi))) | |
2886 | return -EFAULT; | |
2887 | result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames); | |
2888 | __put_user(result, &_xferi->result); | |
2889 | return result < 0 ? result : 0; | |
2890 | } | |
2891 | case SNDRV_PCM_IOCTL_READN_FRAMES: | |
2892 | { | |
877211f5 TI |
2893 | struct snd_xfern xfern; |
2894 | struct snd_xfern __user *_xfern = arg; | |
2895 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
2896 | void *bufs; |
2897 | snd_pcm_sframes_t result; | |
2898 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2899 | return -EBADFD; | |
2900 | if (runtime->channels > 128) | |
2901 | return -EINVAL; | |
2902 | if (put_user(0, &_xfern->result)) | |
2903 | return -EFAULT; | |
2904 | if (copy_from_user(&xfern, _xfern, sizeof(xfern))) | |
2905 | return -EFAULT; | |
ef44a1ec LZ |
2906 | |
2907 | bufs = memdup_user(xfern.bufs, | |
2908 | sizeof(void *) * runtime->channels); | |
2909 | if (IS_ERR(bufs)) | |
2910 | return PTR_ERR(bufs); | |
1da177e4 LT |
2911 | result = snd_pcm_lib_readv(substream, bufs, xfern.frames); |
2912 | kfree(bufs); | |
2913 | __put_user(result, &_xfern->result); | |
2914 | return result < 0 ? result : 0; | |
2915 | } | |
2916 | case SNDRV_PCM_IOCTL_REWIND: | |
2917 | { | |
2918 | snd_pcm_uframes_t frames; | |
2919 | snd_pcm_uframes_t __user *_frames = arg; | |
2920 | snd_pcm_sframes_t result; | |
2921 | if (get_user(frames, _frames)) | |
2922 | return -EFAULT; | |
2923 | if (put_user(0, _frames)) | |
2924 | return -EFAULT; | |
2925 | result = snd_pcm_capture_rewind(substream, frames); | |
2926 | __put_user(result, _frames); | |
2927 | return result < 0 ? result : 0; | |
2928 | } | |
2929 | case SNDRV_PCM_IOCTL_FORWARD: | |
2930 | { | |
2931 | snd_pcm_uframes_t frames; | |
2932 | snd_pcm_uframes_t __user *_frames = arg; | |
2933 | snd_pcm_sframes_t result; | |
2934 | if (get_user(frames, _frames)) | |
2935 | return -EFAULT; | |
2936 | if (put_user(0, _frames)) | |
2937 | return -EFAULT; | |
2938 | result = snd_pcm_capture_forward(substream, frames); | |
2939 | __put_user(result, _frames); | |
2940 | return result < 0 ? result : 0; | |
2941 | } | |
2942 | } | |
0df63e44 | 2943 | return snd_pcm_common_ioctl1(file, substream, cmd, arg); |
1da177e4 LT |
2944 | } |
2945 | ||
877211f5 TI |
2946 | static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd, |
2947 | unsigned long arg) | |
1da177e4 | 2948 | { |
877211f5 | 2949 | struct snd_pcm_file *pcm_file; |
1da177e4 LT |
2950 | |
2951 | pcm_file = file->private_data; | |
2952 | ||
2953 | if (((cmd >> 8) & 0xff) != 'A') | |
2954 | return -ENOTTY; | |
2955 | ||
0df63e44 TI |
2956 | return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd, |
2957 | (void __user *)arg); | |
1da177e4 LT |
2958 | } |
2959 | ||
877211f5 TI |
2960 | static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd, |
2961 | unsigned long arg) | |
1da177e4 | 2962 | { |
877211f5 | 2963 | struct snd_pcm_file *pcm_file; |
1da177e4 LT |
2964 | |
2965 | pcm_file = file->private_data; | |
2966 | ||
2967 | if (((cmd >> 8) & 0xff) != 'A') | |
2968 | return -ENOTTY; | |
2969 | ||
0df63e44 TI |
2970 | return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd, |
2971 | (void __user *)arg); | |
1da177e4 LT |
2972 | } |
2973 | ||
c2c86a97 TI |
2974 | /** |
2975 | * snd_pcm_kernel_ioctl - Execute PCM ioctl in the kernel-space | |
2976 | * @substream: PCM substream | |
2977 | * @cmd: IOCTL cmd | |
2978 | * @arg: IOCTL argument | |
2979 | * | |
2980 | * The function is provided primarily for OSS layer and USB gadget drivers, | |
2981 | * and it allows only the limited set of ioctls (hw_params, sw_params, | |
2982 | * prepare, start, drain, drop, forward). | |
2983 | */ | |
bf1bbb5a TI |
2984 | int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, |
2985 | unsigned int cmd, void *arg) | |
1da177e4 | 2986 | { |
c2c86a97 TI |
2987 | snd_pcm_uframes_t *frames = arg; |
2988 | snd_pcm_sframes_t result; | |
1da177e4 | 2989 | |
c2c86a97 TI |
2990 | switch (cmd) { |
2991 | case SNDRV_PCM_IOCTL_FORWARD: | |
2992 | { | |
2993 | /* provided only for OSS; capture-only and no value returned */ | |
2994 | if (substream->stream != SNDRV_PCM_STREAM_CAPTURE) | |
2995 | return -EINVAL; | |
2996 | result = snd_pcm_capture_forward(substream, *frames); | |
2997 | return result < 0 ? result : 0; | |
2998 | } | |
2999 | case SNDRV_PCM_IOCTL_HW_PARAMS: | |
3000 | return snd_pcm_hw_params(substream, arg); | |
3001 | case SNDRV_PCM_IOCTL_SW_PARAMS: | |
3002 | return snd_pcm_sw_params(substream, arg); | |
3003 | case SNDRV_PCM_IOCTL_PREPARE: | |
3004 | return snd_pcm_prepare(substream, NULL); | |
3005 | case SNDRV_PCM_IOCTL_START: | |
3006 | return snd_pcm_start_lock_irq(substream); | |
3007 | case SNDRV_PCM_IOCTL_DRAIN: | |
3008 | return snd_pcm_drain(substream, NULL); | |
3009 | case SNDRV_PCM_IOCTL_DROP: | |
3010 | return snd_pcm_drop(substream); | |
3011 | case SNDRV_PCM_IOCTL_DELAY: | |
3012 | { | |
3013 | result = snd_pcm_delay(substream); | |
3014 | if (result < 0) | |
3015 | return result; | |
3016 | *frames = result; | |
3017 | return 0; | |
3018 | } | |
1da177e4 | 3019 | default: |
c2c86a97 | 3020 | return -EINVAL; |
1da177e4 LT |
3021 | } |
3022 | } | |
e88e8ae6 TI |
3023 | EXPORT_SYMBOL(snd_pcm_kernel_ioctl); |
3024 | ||
877211f5 TI |
3025 | static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count, |
3026 | loff_t * offset) | |
1da177e4 | 3027 | { |
877211f5 TI |
3028 | struct snd_pcm_file *pcm_file; |
3029 | struct snd_pcm_substream *substream; | |
3030 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3031 | snd_pcm_sframes_t result; |
3032 | ||
3033 | pcm_file = file->private_data; | |
3034 | substream = pcm_file->substream; | |
7eaa943c TI |
3035 | if (PCM_RUNTIME_CHECK(substream)) |
3036 | return -ENXIO; | |
1da177e4 LT |
3037 | runtime = substream->runtime; |
3038 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
3039 | return -EBADFD; | |
3040 | if (!frame_aligned(runtime, count)) | |
3041 | return -EINVAL; | |
3042 | count = bytes_to_frames(runtime, count); | |
3043 | result = snd_pcm_lib_read(substream, buf, count); | |
3044 | if (result > 0) | |
3045 | result = frames_to_bytes(runtime, result); | |
3046 | return result; | |
3047 | } | |
3048 | ||
877211f5 TI |
3049 | static ssize_t snd_pcm_write(struct file *file, const char __user *buf, |
3050 | size_t count, loff_t * offset) | |
1da177e4 | 3051 | { |
877211f5 TI |
3052 | struct snd_pcm_file *pcm_file; |
3053 | struct snd_pcm_substream *substream; | |
3054 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3055 | snd_pcm_sframes_t result; |
3056 | ||
3057 | pcm_file = file->private_data; | |
3058 | substream = pcm_file->substream; | |
7eaa943c TI |
3059 | if (PCM_RUNTIME_CHECK(substream)) |
3060 | return -ENXIO; | |
1da177e4 | 3061 | runtime = substream->runtime; |
7eaa943c TI |
3062 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
3063 | return -EBADFD; | |
3064 | if (!frame_aligned(runtime, count)) | |
3065 | return -EINVAL; | |
1da177e4 LT |
3066 | count = bytes_to_frames(runtime, count); |
3067 | result = snd_pcm_lib_write(substream, buf, count); | |
3068 | if (result > 0) | |
3069 | result = frames_to_bytes(runtime, result); | |
1da177e4 LT |
3070 | return result; |
3071 | } | |
3072 | ||
1c65d986 | 3073 | static ssize_t snd_pcm_readv(struct kiocb *iocb, struct iov_iter *to) |
1da177e4 | 3074 | { |
877211f5 TI |
3075 | struct snd_pcm_file *pcm_file; |
3076 | struct snd_pcm_substream *substream; | |
3077 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3078 | snd_pcm_sframes_t result; |
3079 | unsigned long i; | |
3080 | void __user **bufs; | |
3081 | snd_pcm_uframes_t frames; | |
3082 | ||
ee0b3e67 | 3083 | pcm_file = iocb->ki_filp->private_data; |
1da177e4 | 3084 | substream = pcm_file->substream; |
7eaa943c TI |
3085 | if (PCM_RUNTIME_CHECK(substream)) |
3086 | return -ENXIO; | |
1da177e4 LT |
3087 | runtime = substream->runtime; |
3088 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
3089 | return -EBADFD; | |
1c65d986 AV |
3090 | if (!iter_is_iovec(to)) |
3091 | return -EINVAL; | |
3092 | if (to->nr_segs > 1024 || to->nr_segs != runtime->channels) | |
1da177e4 | 3093 | return -EINVAL; |
1c65d986 | 3094 | if (!frame_aligned(runtime, to->iov->iov_len)) |
1da177e4 | 3095 | return -EINVAL; |
1c65d986 AV |
3096 | frames = bytes_to_samples(runtime, to->iov->iov_len); |
3097 | bufs = kmalloc(sizeof(void *) * to->nr_segs, GFP_KERNEL); | |
1da177e4 LT |
3098 | if (bufs == NULL) |
3099 | return -ENOMEM; | |
1c65d986 AV |
3100 | for (i = 0; i < to->nr_segs; ++i) |
3101 | bufs[i] = to->iov[i].iov_base; | |
1da177e4 LT |
3102 | result = snd_pcm_lib_readv(substream, bufs, frames); |
3103 | if (result > 0) | |
3104 | result = frames_to_bytes(runtime, result); | |
3105 | kfree(bufs); | |
3106 | return result; | |
3107 | } | |
3108 | ||
1c65d986 | 3109 | static ssize_t snd_pcm_writev(struct kiocb *iocb, struct iov_iter *from) |
1da177e4 | 3110 | { |
877211f5 TI |
3111 | struct snd_pcm_file *pcm_file; |
3112 | struct snd_pcm_substream *substream; | |
3113 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3114 | snd_pcm_sframes_t result; |
3115 | unsigned long i; | |
3116 | void __user **bufs; | |
3117 | snd_pcm_uframes_t frames; | |
3118 | ||
ee0b3e67 | 3119 | pcm_file = iocb->ki_filp->private_data; |
1da177e4 | 3120 | substream = pcm_file->substream; |
7eaa943c TI |
3121 | if (PCM_RUNTIME_CHECK(substream)) |
3122 | return -ENXIO; | |
1da177e4 | 3123 | runtime = substream->runtime; |
7eaa943c TI |
3124 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
3125 | return -EBADFD; | |
1c65d986 AV |
3126 | if (!iter_is_iovec(from)) |
3127 | return -EINVAL; | |
3128 | if (from->nr_segs > 128 || from->nr_segs != runtime->channels || | |
3129 | !frame_aligned(runtime, from->iov->iov_len)) | |
7eaa943c | 3130 | return -EINVAL; |
1c65d986 AV |
3131 | frames = bytes_to_samples(runtime, from->iov->iov_len); |
3132 | bufs = kmalloc(sizeof(void *) * from->nr_segs, GFP_KERNEL); | |
1da177e4 LT |
3133 | if (bufs == NULL) |
3134 | return -ENOMEM; | |
1c65d986 AV |
3135 | for (i = 0; i < from->nr_segs; ++i) |
3136 | bufs[i] = from->iov[i].iov_base; | |
1da177e4 LT |
3137 | result = snd_pcm_lib_writev(substream, bufs, frames); |
3138 | if (result > 0) | |
3139 | result = frames_to_bytes(runtime, result); | |
3140 | kfree(bufs); | |
1da177e4 LT |
3141 | return result; |
3142 | } | |
3143 | ||
3144 | static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait) | |
3145 | { | |
877211f5 TI |
3146 | struct snd_pcm_file *pcm_file; |
3147 | struct snd_pcm_substream *substream; | |
3148 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3149 | unsigned int mask; |
3150 | snd_pcm_uframes_t avail; | |
3151 | ||
3152 | pcm_file = file->private_data; | |
3153 | ||
3154 | substream = pcm_file->substream; | |
7eaa943c | 3155 | if (PCM_RUNTIME_CHECK(substream)) |
e099aeea | 3156 | return POLLOUT | POLLWRNORM | POLLERR; |
1da177e4 LT |
3157 | runtime = substream->runtime; |
3158 | ||
3159 | poll_wait(file, &runtime->sleep, wait); | |
3160 | ||
3161 | snd_pcm_stream_lock_irq(substream); | |
3162 | avail = snd_pcm_playback_avail(runtime); | |
3163 | switch (runtime->status->state) { | |
3164 | case SNDRV_PCM_STATE_RUNNING: | |
3165 | case SNDRV_PCM_STATE_PREPARED: | |
3166 | case SNDRV_PCM_STATE_PAUSED: | |
3167 | if (avail >= runtime->control->avail_min) { | |
3168 | mask = POLLOUT | POLLWRNORM; | |
3169 | break; | |
3170 | } | |
3171 | /* Fall through */ | |
3172 | case SNDRV_PCM_STATE_DRAINING: | |
3173 | mask = 0; | |
3174 | break; | |
3175 | default: | |
3176 | mask = POLLOUT | POLLWRNORM | POLLERR; | |
3177 | break; | |
3178 | } | |
3179 | snd_pcm_stream_unlock_irq(substream); | |
3180 | return mask; | |
3181 | } | |
3182 | ||
3183 | static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait) | |
3184 | { | |
877211f5 TI |
3185 | struct snd_pcm_file *pcm_file; |
3186 | struct snd_pcm_substream *substream; | |
3187 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3188 | unsigned int mask; |
3189 | snd_pcm_uframes_t avail; | |
3190 | ||
3191 | pcm_file = file->private_data; | |
3192 | ||
3193 | substream = pcm_file->substream; | |
7eaa943c | 3194 | if (PCM_RUNTIME_CHECK(substream)) |
e099aeea | 3195 | return POLLIN | POLLRDNORM | POLLERR; |
1da177e4 LT |
3196 | runtime = substream->runtime; |
3197 | ||
3198 | poll_wait(file, &runtime->sleep, wait); | |
3199 | ||
3200 | snd_pcm_stream_lock_irq(substream); | |
3201 | avail = snd_pcm_capture_avail(runtime); | |
3202 | switch (runtime->status->state) { | |
3203 | case SNDRV_PCM_STATE_RUNNING: | |
3204 | case SNDRV_PCM_STATE_PREPARED: | |
3205 | case SNDRV_PCM_STATE_PAUSED: | |
3206 | if (avail >= runtime->control->avail_min) { | |
3207 | mask = POLLIN | POLLRDNORM; | |
3208 | break; | |
3209 | } | |
3210 | mask = 0; | |
3211 | break; | |
3212 | case SNDRV_PCM_STATE_DRAINING: | |
3213 | if (avail > 0) { | |
3214 | mask = POLLIN | POLLRDNORM; | |
3215 | break; | |
3216 | } | |
3217 | /* Fall through */ | |
3218 | default: | |
3219 | mask = POLLIN | POLLRDNORM | POLLERR; | |
3220 | break; | |
3221 | } | |
3222 | snd_pcm_stream_unlock_irq(substream); | |
3223 | return mask; | |
3224 | } | |
3225 | ||
3226 | /* | |
3227 | * mmap support | |
3228 | */ | |
3229 | ||
3230 | /* | |
3231 | * Only on coherent architectures, we can mmap the status and the control records | |
3232 | * for effcient data transfer. On others, we have to use HWSYNC ioctl... | |
3233 | */ | |
3234 | #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) | |
3235 | /* | |
3236 | * mmap status record | |
3237 | */ | |
11bac800 | 3238 | static int snd_pcm_mmap_status_fault(struct vm_fault *vmf) |
1da177e4 | 3239 | { |
11bac800 | 3240 | struct snd_pcm_substream *substream = vmf->vma->vm_private_data; |
877211f5 | 3241 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
3242 | |
3243 | if (substream == NULL) | |
3ad5afcd | 3244 | return VM_FAULT_SIGBUS; |
1da177e4 | 3245 | runtime = substream->runtime; |
3ad5afcd NP |
3246 | vmf->page = virt_to_page(runtime->status); |
3247 | get_page(vmf->page); | |
3248 | return 0; | |
1da177e4 LT |
3249 | } |
3250 | ||
f0f37e2f | 3251 | static const struct vm_operations_struct snd_pcm_vm_ops_status = |
1da177e4 | 3252 | { |
3ad5afcd | 3253 | .fault = snd_pcm_mmap_status_fault, |
1da177e4 LT |
3254 | }; |
3255 | ||
877211f5 | 3256 | static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, |
1da177e4 LT |
3257 | struct vm_area_struct *area) |
3258 | { | |
1da177e4 LT |
3259 | long size; |
3260 | if (!(area->vm_flags & VM_READ)) | |
3261 | return -EINVAL; | |
1da177e4 | 3262 | size = area->vm_end - area->vm_start; |
877211f5 | 3263 | if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))) |
1da177e4 LT |
3264 | return -EINVAL; |
3265 | area->vm_ops = &snd_pcm_vm_ops_status; | |
3266 | area->vm_private_data = substream; | |
314e51b9 | 3267 | area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; |
1da177e4 LT |
3268 | return 0; |
3269 | } | |
3270 | ||
3271 | /* | |
3272 | * mmap control record | |
3273 | */ | |
11bac800 | 3274 | static int snd_pcm_mmap_control_fault(struct vm_fault *vmf) |
1da177e4 | 3275 | { |
11bac800 | 3276 | struct snd_pcm_substream *substream = vmf->vma->vm_private_data; |
877211f5 | 3277 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
3278 | |
3279 | if (substream == NULL) | |
3ad5afcd | 3280 | return VM_FAULT_SIGBUS; |
1da177e4 | 3281 | runtime = substream->runtime; |
3ad5afcd NP |
3282 | vmf->page = virt_to_page(runtime->control); |
3283 | get_page(vmf->page); | |
3284 | return 0; | |
1da177e4 LT |
3285 | } |
3286 | ||
f0f37e2f | 3287 | static const struct vm_operations_struct snd_pcm_vm_ops_control = |
1da177e4 | 3288 | { |
3ad5afcd | 3289 | .fault = snd_pcm_mmap_control_fault, |
1da177e4 LT |
3290 | }; |
3291 | ||
877211f5 | 3292 | static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, |
1da177e4 LT |
3293 | struct vm_area_struct *area) |
3294 | { | |
1da177e4 LT |
3295 | long size; |
3296 | if (!(area->vm_flags & VM_READ)) | |
3297 | return -EINVAL; | |
1da177e4 | 3298 | size = area->vm_end - area->vm_start; |
877211f5 | 3299 | if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control))) |
1da177e4 LT |
3300 | return -EINVAL; |
3301 | area->vm_ops = &snd_pcm_vm_ops_control; | |
3302 | area->vm_private_data = substream; | |
314e51b9 | 3303 | area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; |
1da177e4 LT |
3304 | return 0; |
3305 | } | |
3306 | #else /* ! coherent mmap */ | |
3307 | /* | |
3308 | * don't support mmap for status and control records. | |
3309 | */ | |
877211f5 | 3310 | static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, |
1da177e4 LT |
3311 | struct vm_area_struct *area) |
3312 | { | |
3313 | return -ENXIO; | |
3314 | } | |
877211f5 | 3315 | static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, |
1da177e4 LT |
3316 | struct vm_area_struct *area) |
3317 | { | |
3318 | return -ENXIO; | |
3319 | } | |
3320 | #endif /* coherent mmap */ | |
3321 | ||
9eb4a067 TI |
3322 | static inline struct page * |
3323 | snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs) | |
3324 | { | |
3325 | void *vaddr = substream->runtime->dma_area + ofs; | |
3326 | return virt_to_page(vaddr); | |
3327 | } | |
3328 | ||
1da177e4 | 3329 | /* |
3ad5afcd | 3330 | * fault callback for mmapping a RAM page |
1da177e4 | 3331 | */ |
11bac800 | 3332 | static int snd_pcm_mmap_data_fault(struct vm_fault *vmf) |
1da177e4 | 3333 | { |
11bac800 | 3334 | struct snd_pcm_substream *substream = vmf->vma->vm_private_data; |
877211f5 | 3335 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
3336 | unsigned long offset; |
3337 | struct page * page; | |
1da177e4 LT |
3338 | size_t dma_bytes; |
3339 | ||
3340 | if (substream == NULL) | |
3ad5afcd | 3341 | return VM_FAULT_SIGBUS; |
1da177e4 | 3342 | runtime = substream->runtime; |
3ad5afcd | 3343 | offset = vmf->pgoff << PAGE_SHIFT; |
1da177e4 LT |
3344 | dma_bytes = PAGE_ALIGN(runtime->dma_bytes); |
3345 | if (offset > dma_bytes - PAGE_SIZE) | |
3ad5afcd | 3346 | return VM_FAULT_SIGBUS; |
9eb4a067 | 3347 | if (substream->ops->page) |
1da177e4 | 3348 | page = substream->ops->page(substream, offset); |
9eb4a067 TI |
3349 | else |
3350 | page = snd_pcm_default_page_ops(substream, offset); | |
3351 | if (!page) | |
3352 | return VM_FAULT_SIGBUS; | |
b5810039 | 3353 | get_page(page); |
3ad5afcd NP |
3354 | vmf->page = page; |
3355 | return 0; | |
1da177e4 LT |
3356 | } |
3357 | ||
657b1989 TI |
3358 | static const struct vm_operations_struct snd_pcm_vm_ops_data = { |
3359 | .open = snd_pcm_mmap_data_open, | |
3360 | .close = snd_pcm_mmap_data_close, | |
3361 | }; | |
3362 | ||
3363 | static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = { | |
1da177e4 LT |
3364 | .open = snd_pcm_mmap_data_open, |
3365 | .close = snd_pcm_mmap_data_close, | |
3ad5afcd | 3366 | .fault = snd_pcm_mmap_data_fault, |
1da177e4 LT |
3367 | }; |
3368 | ||
3369 | /* | |
3370 | * mmap the DMA buffer on RAM | |
3371 | */ | |
30b771cf TI |
3372 | |
3373 | /** | |
3374 | * snd_pcm_lib_default_mmap - Default PCM data mmap function | |
3375 | * @substream: PCM substream | |
3376 | * @area: VMA | |
3377 | * | |
3378 | * This is the default mmap handler for PCM data. When mmap pcm_ops is NULL, | |
3379 | * this function is invoked implicitly. | |
3380 | */ | |
18a2b962 TI |
3381 | int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream, |
3382 | struct vm_area_struct *area) | |
1da177e4 | 3383 | { |
314e51b9 | 3384 | area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; |
a5606f85 | 3385 | #ifdef CONFIG_GENERIC_ALLOCATOR |
05503214 NC |
3386 | if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_IRAM) { |
3387 | area->vm_page_prot = pgprot_writecombine(area->vm_page_prot); | |
3388 | return remap_pfn_range(area, area->vm_start, | |
3389 | substream->dma_buffer.addr >> PAGE_SHIFT, | |
3390 | area->vm_end - area->vm_start, area->vm_page_prot); | |
3391 | } | |
a5606f85 | 3392 | #endif /* CONFIG_GENERIC_ALLOCATOR */ |
49d776ff | 3393 | #ifndef CONFIG_X86 /* for avoiding warnings arch/x86/mm/pat.c */ |
657b1989 TI |
3394 | if (!substream->ops->page && |
3395 | substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) | |
3396 | return dma_mmap_coherent(substream->dma_buffer.dev.dev, | |
3397 | area, | |
3398 | substream->runtime->dma_area, | |
3399 | substream->runtime->dma_addr, | |
3400 | area->vm_end - area->vm_start); | |
49d776ff | 3401 | #endif /* CONFIG_X86 */ |
657b1989 TI |
3402 | /* mmap with fault handler */ |
3403 | area->vm_ops = &snd_pcm_vm_ops_data_fault; | |
1da177e4 LT |
3404 | return 0; |
3405 | } | |
18a2b962 | 3406 | EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap); |
1da177e4 LT |
3407 | |
3408 | /* | |
3409 | * mmap the DMA buffer on I/O memory area | |
3410 | */ | |
3411 | #if SNDRV_PCM_INFO_MMAP_IOMEM | |
30b771cf TI |
3412 | /** |
3413 | * snd_pcm_lib_mmap_iomem - Default PCM data mmap function for I/O mem | |
3414 | * @substream: PCM substream | |
3415 | * @area: VMA | |
3416 | * | |
3417 | * When your hardware uses the iomapped pages as the hardware buffer and | |
3418 | * wants to mmap it, pass this function as mmap pcm_ops. Note that this | |
3419 | * is supposed to work only on limited architectures. | |
3420 | */ | |
877211f5 TI |
3421 | int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, |
3422 | struct vm_area_struct *area) | |
1da177e4 | 3423 | { |
0fe09a45 | 3424 | struct snd_pcm_runtime *runtime = substream->runtime;; |
1da177e4 | 3425 | |
1da177e4 | 3426 | area->vm_page_prot = pgprot_noncached(area->vm_page_prot); |
0fe09a45 | 3427 | return vm_iomap_memory(area, runtime->dma_addr, runtime->dma_bytes); |
1da177e4 | 3428 | } |
e88e8ae6 TI |
3429 | |
3430 | EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem); | |
1da177e4 LT |
3431 | #endif /* SNDRV_PCM_INFO_MMAP */ |
3432 | ||
3433 | /* | |
3434 | * mmap DMA buffer | |
3435 | */ | |
877211f5 | 3436 | int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, |
1da177e4 LT |
3437 | struct vm_area_struct *area) |
3438 | { | |
877211f5 | 3439 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
3440 | long size; |
3441 | unsigned long offset; | |
3442 | size_t dma_bytes; | |
657b1989 | 3443 | int err; |
1da177e4 LT |
3444 | |
3445 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
3446 | if (!(area->vm_flags & (VM_WRITE|VM_READ))) | |
3447 | return -EINVAL; | |
3448 | } else { | |
3449 | if (!(area->vm_flags & VM_READ)) | |
3450 | return -EINVAL; | |
3451 | } | |
3452 | runtime = substream->runtime; | |
1da177e4 LT |
3453 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
3454 | return -EBADFD; | |
3455 | if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) | |
3456 | return -ENXIO; | |
3457 | if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || | |
3458 | runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) | |
3459 | return -EINVAL; | |
3460 | size = area->vm_end - area->vm_start; | |
3461 | offset = area->vm_pgoff << PAGE_SHIFT; | |
3462 | dma_bytes = PAGE_ALIGN(runtime->dma_bytes); | |
3463 | if ((size_t)size > dma_bytes) | |
3464 | return -EINVAL; | |
3465 | if (offset > dma_bytes - size) | |
3466 | return -EINVAL; | |
3467 | ||
657b1989 TI |
3468 | area->vm_ops = &snd_pcm_vm_ops_data; |
3469 | area->vm_private_data = substream; | |
1da177e4 | 3470 | if (substream->ops->mmap) |
657b1989 | 3471 | err = substream->ops->mmap(substream, area); |
1da177e4 | 3472 | else |
18a2b962 | 3473 | err = snd_pcm_lib_default_mmap(substream, area); |
657b1989 TI |
3474 | if (!err) |
3475 | atomic_inc(&substream->mmap_count); | |
3476 | return err; | |
1da177e4 LT |
3477 | } |
3478 | ||
e88e8ae6 TI |
3479 | EXPORT_SYMBOL(snd_pcm_mmap_data); |
3480 | ||
1da177e4 LT |
3481 | static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area) |
3482 | { | |
877211f5 TI |
3483 | struct snd_pcm_file * pcm_file; |
3484 | struct snd_pcm_substream *substream; | |
1da177e4 LT |
3485 | unsigned long offset; |
3486 | ||
3487 | pcm_file = file->private_data; | |
3488 | substream = pcm_file->substream; | |
7eaa943c TI |
3489 | if (PCM_RUNTIME_CHECK(substream)) |
3490 | return -ENXIO; | |
1da177e4 LT |
3491 | |
3492 | offset = area->vm_pgoff << PAGE_SHIFT; | |
3493 | switch (offset) { | |
3494 | case SNDRV_PCM_MMAP_OFFSET_STATUS: | |
548a648b | 3495 | if (pcm_file->no_compat_mmap) |
1da177e4 LT |
3496 | return -ENXIO; |
3497 | return snd_pcm_mmap_status(substream, file, area); | |
3498 | case SNDRV_PCM_MMAP_OFFSET_CONTROL: | |
548a648b | 3499 | if (pcm_file->no_compat_mmap) |
1da177e4 LT |
3500 | return -ENXIO; |
3501 | return snd_pcm_mmap_control(substream, file, area); | |
3502 | default: | |
3503 | return snd_pcm_mmap_data(substream, file, area); | |
3504 | } | |
3505 | return 0; | |
3506 | } | |
3507 | ||
3508 | static int snd_pcm_fasync(int fd, struct file * file, int on) | |
3509 | { | |
877211f5 TI |
3510 | struct snd_pcm_file * pcm_file; |
3511 | struct snd_pcm_substream *substream; | |
3512 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3513 | |
3514 | pcm_file = file->private_data; | |
3515 | substream = pcm_file->substream; | |
7eaa943c | 3516 | if (PCM_RUNTIME_CHECK(substream)) |
d05468b7 | 3517 | return -ENXIO; |
1da177e4 | 3518 | runtime = substream->runtime; |
d05468b7 | 3519 | return fasync_helper(fd, file, on, &runtime->fasync); |
1da177e4 LT |
3520 | } |
3521 | ||
3522 | /* | |
3523 | * ioctl32 compat | |
3524 | */ | |
3525 | #ifdef CONFIG_COMPAT | |
3526 | #include "pcm_compat.c" | |
3527 | #else | |
3528 | #define snd_pcm_ioctl_compat NULL | |
3529 | #endif | |
3530 | ||
3531 | /* | |
3532 | * To be removed helpers to keep binary compatibility | |
3533 | */ | |
3534 | ||
59d48582 | 3535 | #ifdef CONFIG_SND_SUPPORT_OLD_API |
1da177e4 LT |
3536 | #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5)) |
3537 | #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5)) | |
3538 | ||
877211f5 TI |
3539 | static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params, |
3540 | struct snd_pcm_hw_params_old *oparams) | |
1da177e4 LT |
3541 | { |
3542 | unsigned int i; | |
3543 | ||
3544 | memset(params, 0, sizeof(*params)); | |
3545 | params->flags = oparams->flags; | |
3546 | for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) | |
3547 | params->masks[i].bits[0] = oparams->masks[i]; | |
3548 | memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals)); | |
3549 | params->rmask = __OLD_TO_NEW_MASK(oparams->rmask); | |
3550 | params->cmask = __OLD_TO_NEW_MASK(oparams->cmask); | |
3551 | params->info = oparams->info; | |
3552 | params->msbits = oparams->msbits; | |
3553 | params->rate_num = oparams->rate_num; | |
3554 | params->rate_den = oparams->rate_den; | |
3555 | params->fifo_size = oparams->fifo_size; | |
3556 | } | |
3557 | ||
877211f5 TI |
3558 | static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams, |
3559 | struct snd_pcm_hw_params *params) | |
1da177e4 LT |
3560 | { |
3561 | unsigned int i; | |
3562 | ||
3563 | memset(oparams, 0, sizeof(*oparams)); | |
3564 | oparams->flags = params->flags; | |
3565 | for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) | |
3566 | oparams->masks[i] = params->masks[i].bits[0]; | |
3567 | memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals)); | |
3568 | oparams->rmask = __NEW_TO_OLD_MASK(params->rmask); | |
3569 | oparams->cmask = __NEW_TO_OLD_MASK(params->cmask); | |
3570 | oparams->info = params->info; | |
3571 | oparams->msbits = params->msbits; | |
3572 | oparams->rate_num = params->rate_num; | |
3573 | oparams->rate_den = params->rate_den; | |
3574 | oparams->fifo_size = params->fifo_size; | |
3575 | } | |
3576 | ||
877211f5 TI |
3577 | static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, |
3578 | struct snd_pcm_hw_params_old __user * _oparams) | |
1da177e4 | 3579 | { |
877211f5 TI |
3580 | struct snd_pcm_hw_params *params; |
3581 | struct snd_pcm_hw_params_old *oparams = NULL; | |
1da177e4 LT |
3582 | int err; |
3583 | ||
3584 | params = kmalloc(sizeof(*params), GFP_KERNEL); | |
ef44a1ec LZ |
3585 | if (!params) |
3586 | return -ENOMEM; | |
1da177e4 | 3587 | |
ef44a1ec LZ |
3588 | oparams = memdup_user(_oparams, sizeof(*oparams)); |
3589 | if (IS_ERR(oparams)) { | |
3590 | err = PTR_ERR(oparams); | |
1da177e4 LT |
3591 | goto out; |
3592 | } | |
3593 | snd_pcm_hw_convert_from_old_params(params, oparams); | |
3594 | err = snd_pcm_hw_refine(substream, params); | |
3595 | snd_pcm_hw_convert_to_old_params(oparams, params); | |
3596 | if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { | |
3597 | if (!err) | |
3598 | err = -EFAULT; | |
3599 | } | |
ef44a1ec LZ |
3600 | |
3601 | kfree(oparams); | |
1da177e4 LT |
3602 | out: |
3603 | kfree(params); | |
1da177e4 LT |
3604 | return err; |
3605 | } | |
3606 | ||
877211f5 TI |
3607 | static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, |
3608 | struct snd_pcm_hw_params_old __user * _oparams) | |
1da177e4 | 3609 | { |
877211f5 TI |
3610 | struct snd_pcm_hw_params *params; |
3611 | struct snd_pcm_hw_params_old *oparams = NULL; | |
1da177e4 LT |
3612 | int err; |
3613 | ||
3614 | params = kmalloc(sizeof(*params), GFP_KERNEL); | |
ef44a1ec LZ |
3615 | if (!params) |
3616 | return -ENOMEM; | |
3617 | ||
3618 | oparams = memdup_user(_oparams, sizeof(*oparams)); | |
3619 | if (IS_ERR(oparams)) { | |
3620 | err = PTR_ERR(oparams); | |
1da177e4 LT |
3621 | goto out; |
3622 | } | |
3623 | snd_pcm_hw_convert_from_old_params(params, oparams); | |
3624 | err = snd_pcm_hw_params(substream, params); | |
3625 | snd_pcm_hw_convert_to_old_params(oparams, params); | |
3626 | if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { | |
3627 | if (!err) | |
3628 | err = -EFAULT; | |
3629 | } | |
ef44a1ec LZ |
3630 | |
3631 | kfree(oparams); | |
1da177e4 LT |
3632 | out: |
3633 | kfree(params); | |
1da177e4 LT |
3634 | return err; |
3635 | } | |
59d48582 | 3636 | #endif /* CONFIG_SND_SUPPORT_OLD_API */ |
1da177e4 | 3637 | |
7003609b | 3638 | #ifndef CONFIG_MMU |
55c63bd2 DG |
3639 | static unsigned long snd_pcm_get_unmapped_area(struct file *file, |
3640 | unsigned long addr, | |
3641 | unsigned long len, | |
3642 | unsigned long pgoff, | |
3643 | unsigned long flags) | |
3644 | { | |
3645 | struct snd_pcm_file *pcm_file = file->private_data; | |
3646 | struct snd_pcm_substream *substream = pcm_file->substream; | |
3647 | struct snd_pcm_runtime *runtime = substream->runtime; | |
3648 | unsigned long offset = pgoff << PAGE_SHIFT; | |
3649 | ||
3650 | switch (offset) { | |
3651 | case SNDRV_PCM_MMAP_OFFSET_STATUS: | |
3652 | return (unsigned long)runtime->status; | |
3653 | case SNDRV_PCM_MMAP_OFFSET_CONTROL: | |
3654 | return (unsigned long)runtime->control; | |
3655 | default: | |
3656 | return (unsigned long)runtime->dma_area + offset; | |
3657 | } | |
7003609b CC |
3658 | } |
3659 | #else | |
55c63bd2 | 3660 | # define snd_pcm_get_unmapped_area NULL |
7003609b CC |
3661 | #endif |
3662 | ||
1da177e4 LT |
3663 | /* |
3664 | * Register section | |
3665 | */ | |
3666 | ||
9c2e08c5 | 3667 | const struct file_operations snd_pcm_f_ops[2] = { |
1da177e4 | 3668 | { |
2af677fc CL |
3669 | .owner = THIS_MODULE, |
3670 | .write = snd_pcm_write, | |
1c65d986 | 3671 | .write_iter = snd_pcm_writev, |
f87135f5 | 3672 | .open = snd_pcm_playback_open, |
2af677fc | 3673 | .release = snd_pcm_release, |
02f4865f | 3674 | .llseek = no_llseek, |
2af677fc CL |
3675 | .poll = snd_pcm_playback_poll, |
3676 | .unlocked_ioctl = snd_pcm_playback_ioctl, | |
3677 | .compat_ioctl = snd_pcm_ioctl_compat, | |
3678 | .mmap = snd_pcm_mmap, | |
3679 | .fasync = snd_pcm_fasync, | |
55c63bd2 | 3680 | .get_unmapped_area = snd_pcm_get_unmapped_area, |
1da177e4 LT |
3681 | }, |
3682 | { | |
2af677fc CL |
3683 | .owner = THIS_MODULE, |
3684 | .read = snd_pcm_read, | |
1c65d986 | 3685 | .read_iter = snd_pcm_readv, |
f87135f5 | 3686 | .open = snd_pcm_capture_open, |
2af677fc | 3687 | .release = snd_pcm_release, |
02f4865f | 3688 | .llseek = no_llseek, |
2af677fc CL |
3689 | .poll = snd_pcm_capture_poll, |
3690 | .unlocked_ioctl = snd_pcm_capture_ioctl, | |
3691 | .compat_ioctl = snd_pcm_ioctl_compat, | |
3692 | .mmap = snd_pcm_mmap, | |
3693 | .fasync = snd_pcm_fasync, | |
55c63bd2 | 3694 | .get_unmapped_area = snd_pcm_get_unmapped_area, |
1da177e4 LT |
3695 | } |
3696 | }; |