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> |
108ab9ea | 39 | #include <linux/delay.h> |
1da177e4 | 40 | |
2c4842d3 TS |
41 | #include "pcm_local.h" |
42 | ||
37567c55 | 43 | #ifdef CONFIG_SND_DEBUG |
be4e31da TS |
44 | #define CREATE_TRACE_POINTS |
45 | #include "pcm_param_trace.h" | |
37567c55 TS |
46 | #else |
47 | #define trace_hw_mask_param_enabled() 0 | |
48 | #define trace_hw_interval_param_enabled() 0 | |
49 | #define trace_hw_mask_param(substream, type, index, prev, curr) | |
50 | #define trace_hw_interval_param(substream, type, index, prev, curr) | |
51 | #endif | |
be4e31da | 52 | |
1da177e4 LT |
53 | /* |
54 | * Compatibility | |
55 | */ | |
56 | ||
877211f5 | 57 | struct snd_pcm_hw_params_old { |
1da177e4 LT |
58 | unsigned int flags; |
59 | unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT - | |
60 | SNDRV_PCM_HW_PARAM_ACCESS + 1]; | |
877211f5 | 61 | struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME - |
1da177e4 LT |
62 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1]; |
63 | unsigned int rmask; | |
64 | unsigned int cmask; | |
65 | unsigned int info; | |
66 | unsigned int msbits; | |
67 | unsigned int rate_num; | |
68 | unsigned int rate_den; | |
877211f5 | 69 | snd_pcm_uframes_t fifo_size; |
1da177e4 LT |
70 | unsigned char reserved[64]; |
71 | }; | |
72 | ||
59d48582 | 73 | #ifdef CONFIG_SND_SUPPORT_OLD_API |
877211f5 TI |
74 | #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old) |
75 | #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old) | |
1da177e4 | 76 | |
877211f5 TI |
77 | static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, |
78 | struct snd_pcm_hw_params_old __user * _oparams); | |
79 | static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, | |
80 | struct snd_pcm_hw_params_old __user * _oparams); | |
59d48582 | 81 | #endif |
f87135f5 | 82 | static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream); |
1da177e4 LT |
83 | |
84 | /* | |
85 | * | |
86 | */ | |
87 | ||
7af142f7 TI |
88 | static DEFINE_RWLOCK(snd_pcm_link_rwlock); |
89 | static DECLARE_RWSEM(snd_pcm_link_rwsem); | |
1da177e4 | 90 | |
67ec1072 TI |
91 | /* Writer in rwsem may block readers even during its waiting in queue, |
92 | * and this may lead to a deadlock when the code path takes read sem | |
93 | * twice (e.g. one in snd_pcm_action_nonatomic() and another in | |
94 | * snd_pcm_stream_lock()). As a (suboptimal) workaround, let writer to | |
108ab9ea | 95 | * sleep until all the readers are completed without blocking by writer. |
67ec1072 | 96 | */ |
108ab9ea | 97 | static inline void down_write_nonfifo(struct rw_semaphore *lock) |
67ec1072 TI |
98 | { |
99 | while (!down_write_trylock(lock)) | |
108ab9ea | 100 | msleep(1); |
67ec1072 TI |
101 | } |
102 | ||
30b771cf TI |
103 | /** |
104 | * snd_pcm_stream_lock - Lock the PCM stream | |
105 | * @substream: PCM substream | |
106 | * | |
107 | * This locks the PCM stream's spinlock or mutex depending on the nonatomic | |
108 | * flag of the given substream. This also takes the global link rw lock | |
109 | * (or rw sem), too, for avoiding the race with linked streams. | |
110 | */ | |
7af142f7 TI |
111 | void snd_pcm_stream_lock(struct snd_pcm_substream *substream) |
112 | { | |
113 | if (substream->pcm->nonatomic) { | |
67756e31 | 114 | down_read_nested(&snd_pcm_link_rwsem, SINGLE_DEPTH_NESTING); |
7af142f7 TI |
115 | mutex_lock(&substream->self_group.mutex); |
116 | } else { | |
117 | read_lock(&snd_pcm_link_rwlock); | |
118 | spin_lock(&substream->self_group.lock); | |
119 | } | |
120 | } | |
121 | EXPORT_SYMBOL_GPL(snd_pcm_stream_lock); | |
122 | ||
30b771cf TI |
123 | /** |
124 | * snd_pcm_stream_lock - Unlock the PCM stream | |
125 | * @substream: PCM substream | |
126 | * | |
127 | * This unlocks the PCM stream that has been locked via snd_pcm_stream_lock(). | |
128 | */ | |
7af142f7 TI |
129 | void snd_pcm_stream_unlock(struct snd_pcm_substream *substream) |
130 | { | |
131 | if (substream->pcm->nonatomic) { | |
132 | mutex_unlock(&substream->self_group.mutex); | |
133 | up_read(&snd_pcm_link_rwsem); | |
134 | } else { | |
135 | spin_unlock(&substream->self_group.lock); | |
136 | read_unlock(&snd_pcm_link_rwlock); | |
137 | } | |
138 | } | |
139 | EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock); | |
140 | ||
30b771cf TI |
141 | /** |
142 | * snd_pcm_stream_lock_irq - Lock the PCM stream | |
143 | * @substream: PCM substream | |
144 | * | |
145 | * This locks the PCM stream like snd_pcm_stream_lock() and disables the local | |
146 | * IRQ (only when nonatomic is false). In nonatomic case, this is identical | |
147 | * as snd_pcm_stream_lock(). | |
148 | */ | |
7af142f7 TI |
149 | void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream) |
150 | { | |
151 | if (!substream->pcm->nonatomic) | |
152 | local_irq_disable(); | |
153 | snd_pcm_stream_lock(substream); | |
154 | } | |
155 | EXPORT_SYMBOL_GPL(snd_pcm_stream_lock_irq); | |
156 | ||
30b771cf TI |
157 | /** |
158 | * snd_pcm_stream_unlock_irq - Unlock the PCM stream | |
159 | * @substream: PCM substream | |
160 | * | |
161 | * This is a counter-part of snd_pcm_stream_lock_irq(). | |
162 | */ | |
7af142f7 TI |
163 | void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream) |
164 | { | |
165 | snd_pcm_stream_unlock(substream); | |
166 | if (!substream->pcm->nonatomic) | |
167 | local_irq_enable(); | |
168 | } | |
169 | EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irq); | |
170 | ||
171 | unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream) | |
172 | { | |
173 | unsigned long flags = 0; | |
174 | if (!substream->pcm->nonatomic) | |
175 | local_irq_save(flags); | |
176 | snd_pcm_stream_lock(substream); | |
177 | return flags; | |
178 | } | |
179 | EXPORT_SYMBOL_GPL(_snd_pcm_stream_lock_irqsave); | |
180 | ||
30b771cf TI |
181 | /** |
182 | * snd_pcm_stream_unlock_irqrestore - Unlock the PCM stream | |
183 | * @substream: PCM substream | |
184 | * @flags: irq flags | |
185 | * | |
186 | * This is a counter-part of snd_pcm_stream_lock_irqsave(). | |
187 | */ | |
7af142f7 TI |
188 | void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream, |
189 | unsigned long flags) | |
190 | { | |
191 | snd_pcm_stream_unlock(substream); | |
192 | if (!substream->pcm->nonatomic) | |
193 | local_irq_restore(flags); | |
194 | } | |
195 | EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irqrestore); | |
1da177e4 | 196 | |
877211f5 | 197 | int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info) |
1da177e4 | 198 | { |
877211f5 TI |
199 | struct snd_pcm_runtime *runtime; |
200 | struct snd_pcm *pcm = substream->pcm; | |
201 | struct snd_pcm_str *pstr = substream->pstr; | |
1da177e4 | 202 | |
1da177e4 LT |
203 | memset(info, 0, sizeof(*info)); |
204 | info->card = pcm->card->number; | |
205 | info->device = pcm->device; | |
206 | info->stream = substream->stream; | |
207 | info->subdevice = substream->number; | |
208 | strlcpy(info->id, pcm->id, sizeof(info->id)); | |
209 | strlcpy(info->name, pcm->name, sizeof(info->name)); | |
210 | info->dev_class = pcm->dev_class; | |
211 | info->dev_subclass = pcm->dev_subclass; | |
212 | info->subdevices_count = pstr->substream_count; | |
213 | info->subdevices_avail = pstr->substream_count - pstr->substream_opened; | |
214 | strlcpy(info->subname, substream->name, sizeof(info->subname)); | |
215 | runtime = substream->runtime; | |
e11f0f90 | 216 | |
1da177e4 LT |
217 | return 0; |
218 | } | |
219 | ||
877211f5 TI |
220 | int snd_pcm_info_user(struct snd_pcm_substream *substream, |
221 | struct snd_pcm_info __user * _info) | |
1da177e4 | 222 | { |
877211f5 | 223 | struct snd_pcm_info *info; |
1da177e4 LT |
224 | int err; |
225 | ||
226 | info = kmalloc(sizeof(*info), GFP_KERNEL); | |
227 | if (! info) | |
228 | return -ENOMEM; | |
229 | err = snd_pcm_info(substream, info); | |
230 | if (err >= 0) { | |
231 | if (copy_to_user(_info, info, sizeof(*info))) | |
232 | err = -EFAULT; | |
233 | } | |
234 | kfree(info); | |
235 | return err; | |
236 | } | |
237 | ||
63825f3a TI |
238 | static bool hw_support_mmap(struct snd_pcm_substream *substream) |
239 | { | |
240 | if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_MMAP)) | |
241 | return false; | |
85dc0f85 TI |
242 | /* architecture supports dma_mmap_coherent()? */ |
243 | #if defined(CONFIG_ARCH_NO_COHERENT_DMA_MMAP) || !defined(CONFIG_HAS_DMA) | |
63825f3a TI |
244 | if (!substream->ops->mmap && |
245 | substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) | |
246 | return false; | |
247 | #endif | |
248 | return true; | |
249 | } | |
250 | ||
561e1cad TS |
251 | static int constrain_mask_params(struct snd_pcm_substream *substream, |
252 | struct snd_pcm_hw_params *params) | |
1da177e4 | 253 | { |
561e1cad TS |
254 | struct snd_pcm_hw_constraints *constrs = |
255 | &substream->runtime->hw_constraints; | |
256 | struct snd_mask *m; | |
1da177e4 | 257 | unsigned int k; |
561e1cad TS |
258 | struct snd_mask old_mask; |
259 | int changed; | |
1da177e4 LT |
260 | |
261 | for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { | |
262 | m = hw_param_mask(params, k); | |
263 | if (snd_mask_empty(m)) | |
264 | return -EINVAL; | |
d81052f9 TS |
265 | |
266 | /* This parameter is not requested to change by a caller. */ | |
1da177e4 LT |
267 | if (!(params->rmask & (1 << k))) |
268 | continue; | |
561e1cad TS |
269 | |
270 | if (trace_hw_mask_param_enabled()) | |
271 | old_mask = *m; | |
272 | ||
1da177e4 | 273 | changed = snd_mask_refine(m, constrs_mask(constrs, k)); |
1da177e4 LT |
274 | if (changed < 0) |
275 | return changed; | |
82e7d501 TS |
276 | if (changed == 0) |
277 | continue; | |
561e1cad | 278 | |
d81052f9 | 279 | /* Set corresponding flag so that the caller gets it. */ |
82e7d501 TS |
280 | trace_hw_mask_param(substream, k, 0, &old_mask, m); |
281 | params->cmask |= 1 << k; | |
1da177e4 LT |
282 | } |
283 | ||
561e1cad TS |
284 | return 0; |
285 | } | |
286 | ||
3432fa04 TS |
287 | static int constrain_interval_params(struct snd_pcm_substream *substream, |
288 | struct snd_pcm_hw_params *params) | |
289 | { | |
290 | struct snd_pcm_hw_constraints *constrs = | |
291 | &substream->runtime->hw_constraints; | |
292 | struct snd_interval *i; | |
293 | unsigned int k; | |
294 | struct snd_interval old_interval; | |
295 | int changed; | |
296 | ||
1da177e4 LT |
297 | for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { |
298 | i = hw_param_interval(params, k); | |
299 | if (snd_interval_empty(i)) | |
300 | return -EINVAL; | |
d81052f9 TS |
301 | |
302 | /* This parameter is not requested to change by a caller. */ | |
1da177e4 LT |
303 | if (!(params->rmask & (1 << k))) |
304 | continue; | |
3432fa04 TS |
305 | |
306 | if (trace_hw_interval_param_enabled()) | |
307 | old_interval = *i; | |
308 | ||
1da177e4 | 309 | changed = snd_interval_refine(i, constrs_interval(constrs, k)); |
1da177e4 LT |
310 | if (changed < 0) |
311 | return changed; | |
82e7d501 TS |
312 | if (changed == 0) |
313 | continue; | |
3432fa04 | 314 | |
d81052f9 | 315 | /* Set corresponding flag so that the caller gets it. */ |
82e7d501 TS |
316 | trace_hw_interval_param(substream, k, 0, &old_interval, i); |
317 | params->cmask |= 1 << k; | |
1da177e4 LT |
318 | } |
319 | ||
3432fa04 TS |
320 | return 0; |
321 | } | |
322 | ||
9cc07f55 TS |
323 | static int constrain_params_by_rules(struct snd_pcm_substream *substream, |
324 | struct snd_pcm_hw_params *params) | |
1da177e4 | 325 | { |
9cc07f55 TS |
326 | struct snd_pcm_hw_constraints *constrs = |
327 | &substream->runtime->hw_constraints; | |
1da177e4 | 328 | unsigned int k; |
1da177e4 LT |
329 | unsigned int rstamps[constrs->rules_num]; |
330 | unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1]; | |
d81052f9 | 331 | unsigned int stamp; |
a1c06e39 TS |
332 | struct snd_pcm_hw_rule *r; |
333 | unsigned int d; | |
9cc07f55 TS |
334 | struct snd_mask old_mask; |
335 | struct snd_interval old_interval; | |
a1c06e39 | 336 | bool again; |
9cc07f55 | 337 | int changed; |
1da177e4 | 338 | |
d81052f9 TS |
339 | /* |
340 | * Each application of rule has own sequence number. | |
341 | * | |
342 | * Each member of 'rstamps' array represents the sequence number of | |
343 | * recent application of corresponding rule. | |
344 | */ | |
1da177e4 LT |
345 | for (k = 0; k < constrs->rules_num; k++) |
346 | rstamps[k] = 0; | |
d81052f9 TS |
347 | |
348 | /* | |
349 | * Each member of 'vstamps' array represents the sequence number of | |
350 | * recent application of rule in which corresponding parameters were | |
351 | * changed. | |
352 | * | |
353 | * In initial state, elements corresponding to parameters requested by | |
354 | * a caller is 1. For unrequested parameters, corresponding members | |
355 | * have 0 so that the parameters are never changed anymore. | |
356 | */ | |
9cc07f55 | 357 | for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) |
1da177e4 | 358 | vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0; |
d81052f9 TS |
359 | |
360 | /* Due to the above design, actual sequence number starts at 2. */ | |
361 | stamp = 2; | |
0d4e3999 | 362 | retry: |
d81052f9 | 363 | /* Apply all rules in order. */ |
a1c06e39 | 364 | again = false; |
0d4e3999 | 365 | for (k = 0; k < constrs->rules_num; k++) { |
a1c06e39 | 366 | r = &constrs->rules[k]; |
d81052f9 TS |
367 | |
368 | /* | |
369 | * Check condition bits of this rule. When the rule has | |
370 | * some condition bits, parameter without the bits is | |
371 | * never processed. SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP | |
372 | * is an example of the condition bits. | |
373 | */ | |
0d4e3999 TS |
374 | if (r->cond && !(r->cond & params->flags)) |
375 | continue; | |
d81052f9 TS |
376 | |
377 | /* | |
378 | * The 'deps' array includes maximum three dependencies | |
379 | * to SNDRV_PCM_HW_PARAM_XXXs for this rule. The fourth | |
380 | * member of this array is a sentinel and should be | |
381 | * negative value. | |
382 | * | |
383 | * This rule should be processed in this time when dependent | |
384 | * parameters were changed at former applications of the other | |
385 | * rules. | |
386 | */ | |
0d4e3999 | 387 | for (d = 0; r->deps[d] >= 0; d++) { |
d656b4a6 | 388 | if (vstamps[r->deps[d]] > rstamps[k]) |
0d4e3999 | 389 | break; |
0d4e3999 | 390 | } |
d656b4a6 | 391 | if (r->deps[d] < 0) |
0d4e3999 | 392 | continue; |
be4e31da | 393 | |
0d4e3999 TS |
394 | if (trace_hw_mask_param_enabled()) { |
395 | if (hw_is_mask(r->var)) | |
396 | old_mask = *hw_param_mask(params, r->var); | |
397 | } | |
398 | if (trace_hw_interval_param_enabled()) { | |
399 | if (hw_is_interval(r->var)) | |
400 | old_interval = *hw_param_interval(params, r->var); | |
401 | } | |
c6706de0 | 402 | |
0d4e3999 | 403 | changed = r->func(params, r); |
f74ae15f TS |
404 | if (changed < 0) |
405 | return changed; | |
c6706de0 | 406 | |
d81052f9 | 407 | /* |
82e7d501 | 408 | * When the parameter is changed, notify it to the caller |
d81052f9 TS |
409 | * by corresponding returned bit, then preparing for next |
410 | * iteration. | |
411 | */ | |
0d4e3999 | 412 | if (changed && r->var >= 0) { |
82e7d501 TS |
413 | if (hw_is_mask(r->var)) { |
414 | trace_hw_mask_param(substream, r->var, | |
415 | k + 1, &old_mask, | |
416 | hw_param_mask(params, r->var)); | |
1da177e4 | 417 | } |
82e7d501 TS |
418 | if (hw_is_interval(r->var)) { |
419 | trace_hw_interval_param(substream, r->var, | |
420 | k + 1, &old_interval, | |
421 | hw_param_interval(params, r->var)); | |
1da177e4 | 422 | } |
82e7d501 | 423 | |
0d4e3999 TS |
424 | params->cmask |= (1 << r->var); |
425 | vstamps[r->var] = stamp; | |
a1c06e39 | 426 | again = true; |
1da177e4 | 427 | } |
f74ae15f | 428 | |
82e7d501 | 429 | rstamps[k] = stamp++; |
0d4e3999 TS |
430 | } |
431 | ||
d81052f9 | 432 | /* Iterate to evaluate all rules till no parameters are changed. */ |
0d4e3999 TS |
433 | if (again) |
434 | goto retry; | |
9cc07f55 TS |
435 | |
436 | return 0; | |
437 | } | |
438 | ||
f9a076bf TS |
439 | static int fixup_unreferenced_params(struct snd_pcm_substream *substream, |
440 | struct snd_pcm_hw_params *params) | |
441 | { | |
442 | const struct snd_interval *i; | |
443 | const struct snd_mask *m; | |
444 | int err; | |
445 | ||
1da177e4 | 446 | if (!params->msbits) { |
f9a076bf | 447 | i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); |
1da177e4 LT |
448 | if (snd_interval_single(i)) |
449 | params->msbits = snd_interval_value(i); | |
450 | } | |
451 | ||
452 | if (!params->rate_den) { | |
f9a076bf | 453 | i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE); |
1da177e4 LT |
454 | if (snd_interval_single(i)) { |
455 | params->rate_num = snd_interval_value(i); | |
456 | params->rate_den = 1; | |
457 | } | |
458 | } | |
459 | ||
f9a076bf TS |
460 | if (!params->fifo_size) { |
461 | m = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT); | |
462 | i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS); | |
463 | if (snd_mask_single(m) && snd_interval_single(i)) { | |
464 | err = substream->ops->ioctl(substream, | |
465 | SNDRV_PCM_IOCTL1_FIFO_SIZE, params); | |
466 | if (err < 0) | |
467 | return err; | |
468 | } | |
469 | } | |
470 | ||
63825f3a | 471 | if (!params->info) { |
7802fb52 TS |
472 | params->info = substream->runtime->hw.info; |
473 | params->info &= ~(SNDRV_PCM_INFO_FIFO_IN_FRAMES | | |
474 | SNDRV_PCM_INFO_DRAIN_TRIGGER); | |
63825f3a TI |
475 | if (!hw_support_mmap(substream)) |
476 | params->info &= ~(SNDRV_PCM_INFO_MMAP | | |
477 | SNDRV_PCM_INFO_MMAP_VALID); | |
478 | } | |
7802fb52 | 479 | |
f9a076bf TS |
480 | return 0; |
481 | } | |
482 | ||
9cc07f55 TS |
483 | int snd_pcm_hw_refine(struct snd_pcm_substream *substream, |
484 | struct snd_pcm_hw_params *params) | |
485 | { | |
9cc07f55 TS |
486 | int err; |
487 | ||
488 | params->info = 0; | |
489 | params->fifo_size = 0; | |
490 | if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS)) | |
491 | params->msbits = 0; | |
492 | if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) { | |
493 | params->rate_num = 0; | |
494 | params->rate_den = 0; | |
8bea869c | 495 | } |
9cc07f55 TS |
496 | |
497 | err = constrain_mask_params(substream, params); | |
498 | if (err < 0) | |
499 | return err; | |
500 | ||
501 | err = constrain_interval_params(substream, params); | |
502 | if (err < 0) | |
503 | return err; | |
504 | ||
505 | err = constrain_params_by_rules(substream, params); | |
506 | if (err < 0) | |
507 | return err; | |
508 | ||
1da177e4 | 509 | params->rmask = 0; |
7802fb52 | 510 | |
1da177e4 LT |
511 | return 0; |
512 | } | |
e88e8ae6 TI |
513 | EXPORT_SYMBOL(snd_pcm_hw_refine); |
514 | ||
877211f5 TI |
515 | static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream, |
516 | struct snd_pcm_hw_params __user * _params) | |
1da177e4 | 517 | { |
877211f5 | 518 | struct snd_pcm_hw_params *params; |
1da177e4 LT |
519 | int err; |
520 | ||
ef44a1ec LZ |
521 | params = memdup_user(_params, sizeof(*params)); |
522 | if (IS_ERR(params)) | |
523 | return PTR_ERR(params); | |
524 | ||
1da177e4 | 525 | err = snd_pcm_hw_refine(substream, params); |
f74ae15f TS |
526 | if (err < 0) |
527 | goto end; | |
ef44a1ec | 528 | |
f74ae15f TS |
529 | err = fixup_unreferenced_params(substream, params); |
530 | if (err < 0) | |
531 | goto end; | |
ef44a1ec | 532 | |
f74ae15f TS |
533 | if (copy_to_user(_params, params, sizeof(*params))) |
534 | err = -EFAULT; | |
535 | end: | |
1da177e4 LT |
536 | kfree(params); |
537 | return err; | |
538 | } | |
539 | ||
9442e691 TI |
540 | static int period_to_usecs(struct snd_pcm_runtime *runtime) |
541 | { | |
542 | int usecs; | |
543 | ||
544 | if (! runtime->rate) | |
545 | return -1; /* invalid */ | |
546 | ||
547 | /* take 75% of period time as the deadline */ | |
548 | usecs = (750000 / runtime->rate) * runtime->period_size; | |
549 | usecs += ((750000 % runtime->rate) * runtime->period_size) / | |
550 | runtime->rate; | |
551 | ||
552 | return usecs; | |
553 | } | |
554 | ||
9b0573c0 TI |
555 | static void snd_pcm_set_state(struct snd_pcm_substream *substream, int state) |
556 | { | |
557 | snd_pcm_stream_lock_irq(substream); | |
558 | if (substream->runtime->status->state != SNDRV_PCM_STATE_DISCONNECTED) | |
559 | substream->runtime->status->state = state; | |
560 | snd_pcm_stream_unlock_irq(substream); | |
561 | } | |
562 | ||
90bbaf66 JY |
563 | static inline void snd_pcm_timer_notify(struct snd_pcm_substream *substream, |
564 | int event) | |
565 | { | |
566 | #ifdef CONFIG_SND_PCM_TIMER | |
567 | if (substream->timer) | |
568 | snd_timer_notify(substream->timer, event, | |
569 | &substream->runtime->trigger_tstamp); | |
570 | #endif | |
571 | } | |
572 | ||
60f96aae TS |
573 | /** |
574 | * snd_pcm_hw_param_choose - choose a configuration defined by @params | |
575 | * @pcm: PCM instance | |
576 | * @params: the hw_params instance | |
577 | * | |
578 | * Choose one configuration from configuration space defined by @params. | |
579 | * The configuration chosen is that obtained fixing in this order: | |
580 | * first access, first format, first subformat, min channels, | |
581 | * min rate, min period time, max buffer size, min tick time | |
582 | * | |
583 | * Return: Zero if successful, or a negative error code on failure. | |
584 | */ | |
585 | static int snd_pcm_hw_params_choose(struct snd_pcm_substream *pcm, | |
586 | struct snd_pcm_hw_params *params) | |
587 | { | |
588 | static const int vars[] = { | |
589 | SNDRV_PCM_HW_PARAM_ACCESS, | |
590 | SNDRV_PCM_HW_PARAM_FORMAT, | |
591 | SNDRV_PCM_HW_PARAM_SUBFORMAT, | |
592 | SNDRV_PCM_HW_PARAM_CHANNELS, | |
593 | SNDRV_PCM_HW_PARAM_RATE, | |
594 | SNDRV_PCM_HW_PARAM_PERIOD_TIME, | |
595 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
596 | SNDRV_PCM_HW_PARAM_TICK_TIME, | |
597 | -1 | |
598 | }; | |
599 | const int *v; | |
7b8a54af TS |
600 | struct snd_mask old_mask; |
601 | struct snd_interval old_interval; | |
82e7d501 | 602 | int changed; |
60f96aae TS |
603 | |
604 | for (v = vars; *v != -1; v++) { | |
7b8a54af TS |
605 | /* Keep old parameter to trace. */ |
606 | if (trace_hw_mask_param_enabled()) { | |
607 | if (hw_is_mask(*v)) | |
608 | old_mask = *hw_param_mask(params, *v); | |
609 | } | |
610 | if (trace_hw_interval_param_enabled()) { | |
611 | if (hw_is_interval(*v)) | |
612 | old_interval = *hw_param_interval(params, *v); | |
613 | } | |
60f96aae | 614 | if (*v != SNDRV_PCM_HW_PARAM_BUFFER_SIZE) |
82e7d501 | 615 | changed = snd_pcm_hw_param_first(pcm, params, *v, NULL); |
60f96aae | 616 | else |
82e7d501 TS |
617 | changed = snd_pcm_hw_param_last(pcm, params, *v, NULL); |
618 | if (snd_BUG_ON(changed < 0)) | |
619 | return changed; | |
620 | if (changed == 0) | |
621 | continue; | |
7b8a54af | 622 | |
82e7d501 | 623 | /* Trace the changed parameter. */ |
7b8a54af TS |
624 | if (hw_is_mask(*v)) { |
625 | trace_hw_mask_param(pcm, *v, 0, &old_mask, | |
626 | hw_param_mask(params, *v)); | |
627 | } | |
628 | if (hw_is_interval(*v)) { | |
629 | trace_hw_interval_param(pcm, *v, 0, &old_interval, | |
630 | hw_param_interval(params, *v)); | |
631 | } | |
60f96aae | 632 | } |
7b8a54af | 633 | |
60f96aae TS |
634 | return 0; |
635 | } | |
636 | ||
877211f5 TI |
637 | static int snd_pcm_hw_params(struct snd_pcm_substream *substream, |
638 | struct snd_pcm_hw_params *params) | |
1da177e4 | 639 | { |
877211f5 | 640 | struct snd_pcm_runtime *runtime; |
9442e691 | 641 | int err, usecs; |
1da177e4 LT |
642 | unsigned int bits; |
643 | snd_pcm_uframes_t frames; | |
644 | ||
7eaa943c TI |
645 | if (PCM_RUNTIME_CHECK(substream)) |
646 | return -ENXIO; | |
1da177e4 | 647 | runtime = substream->runtime; |
1da177e4 LT |
648 | snd_pcm_stream_lock_irq(substream); |
649 | switch (runtime->status->state) { | |
650 | case SNDRV_PCM_STATE_OPEN: | |
651 | case SNDRV_PCM_STATE_SETUP: | |
652 | case SNDRV_PCM_STATE_PREPARED: | |
653 | break; | |
654 | default: | |
655 | snd_pcm_stream_unlock_irq(substream); | |
656 | return -EBADFD; | |
657 | } | |
658 | snd_pcm_stream_unlock_irq(substream); | |
8eeaa2f9 | 659 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
1da177e4 LT |
660 | if (!substream->oss.oss) |
661 | #endif | |
9c323fcb | 662 | if (atomic_read(&substream->mmap_count)) |
1da177e4 LT |
663 | return -EBADFD; |
664 | ||
665 | params->rmask = ~0U; | |
666 | err = snd_pcm_hw_refine(substream, params); | |
667 | if (err < 0) | |
668 | goto _error; | |
669 | ||
670 | err = snd_pcm_hw_params_choose(substream, params); | |
671 | if (err < 0) | |
672 | goto _error; | |
673 | ||
f9a076bf TS |
674 | err = fixup_unreferenced_params(substream, params); |
675 | if (err < 0) | |
676 | goto _error; | |
677 | ||
1da177e4 LT |
678 | if (substream->ops->hw_params != NULL) { |
679 | err = substream->ops->hw_params(substream, params); | |
680 | if (err < 0) | |
681 | goto _error; | |
682 | } | |
683 | ||
684 | runtime->access = params_access(params); | |
685 | runtime->format = params_format(params); | |
686 | runtime->subformat = params_subformat(params); | |
687 | runtime->channels = params_channels(params); | |
688 | runtime->rate = params_rate(params); | |
689 | runtime->period_size = params_period_size(params); | |
690 | runtime->periods = params_periods(params); | |
691 | runtime->buffer_size = params_buffer_size(params); | |
1da177e4 LT |
692 | runtime->info = params->info; |
693 | runtime->rate_num = params->rate_num; | |
694 | runtime->rate_den = params->rate_den; | |
ab69a490 CL |
695 | runtime->no_period_wakeup = |
696 | (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) && | |
697 | (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP); | |
1da177e4 LT |
698 | |
699 | bits = snd_pcm_format_physical_width(runtime->format); | |
700 | runtime->sample_bits = bits; | |
701 | bits *= runtime->channels; | |
702 | runtime->frame_bits = bits; | |
703 | frames = 1; | |
704 | while (bits % 8 != 0) { | |
705 | bits *= 2; | |
706 | frames *= 2; | |
707 | } | |
708 | runtime->byte_align = bits / 8; | |
709 | runtime->min_align = frames; | |
710 | ||
711 | /* Default sw params */ | |
712 | runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; | |
713 | runtime->period_step = 1; | |
1da177e4 | 714 | runtime->control->avail_min = runtime->period_size; |
1da177e4 LT |
715 | runtime->start_threshold = 1; |
716 | runtime->stop_threshold = runtime->buffer_size; | |
717 | runtime->silence_threshold = 0; | |
718 | runtime->silence_size = 0; | |
ead4046b CL |
719 | runtime->boundary = runtime->buffer_size; |
720 | while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size) | |
721 | runtime->boundary *= 2; | |
1da177e4 LT |
722 | |
723 | snd_pcm_timer_resolution_change(substream); | |
9b0573c0 | 724 | snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP); |
9442e691 | 725 | |
82f68251 JB |
726 | if (pm_qos_request_active(&substream->latency_pm_qos_req)) |
727 | pm_qos_remove_request(&substream->latency_pm_qos_req); | |
9442e691 | 728 | if ((usecs = period_to_usecs(runtime)) >= 0) |
82f68251 JB |
729 | pm_qos_add_request(&substream->latency_pm_qos_req, |
730 | PM_QOS_CPU_DMA_LATENCY, usecs); | |
1da177e4 LT |
731 | return 0; |
732 | _error: | |
25985edc | 733 | /* hardware might be unusable from this time, |
1da177e4 LT |
734 | so we force application to retry to set |
735 | the correct hardware parameter settings */ | |
9b0573c0 | 736 | snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN); |
1da177e4 LT |
737 | if (substream->ops->hw_free != NULL) |
738 | substream->ops->hw_free(substream); | |
739 | return err; | |
740 | } | |
741 | ||
877211f5 TI |
742 | static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream, |
743 | struct snd_pcm_hw_params __user * _params) | |
1da177e4 | 744 | { |
877211f5 | 745 | struct snd_pcm_hw_params *params; |
1da177e4 LT |
746 | int err; |
747 | ||
ef44a1ec LZ |
748 | params = memdup_user(_params, sizeof(*params)); |
749 | if (IS_ERR(params)) | |
750 | return PTR_ERR(params); | |
751 | ||
1da177e4 | 752 | err = snd_pcm_hw_params(substream, params); |
f74ae15f TS |
753 | if (err < 0) |
754 | goto end; | |
ef44a1ec | 755 | |
f74ae15f TS |
756 | if (copy_to_user(_params, params, sizeof(*params))) |
757 | err = -EFAULT; | |
758 | end: | |
1da177e4 LT |
759 | kfree(params); |
760 | return err; | |
761 | } | |
762 | ||
877211f5 | 763 | static int snd_pcm_hw_free(struct snd_pcm_substream *substream) |
1da177e4 | 764 | { |
877211f5 | 765 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
766 | int result = 0; |
767 | ||
7eaa943c TI |
768 | if (PCM_RUNTIME_CHECK(substream)) |
769 | return -ENXIO; | |
1da177e4 | 770 | runtime = substream->runtime; |
1da177e4 LT |
771 | snd_pcm_stream_lock_irq(substream); |
772 | switch (runtime->status->state) { | |
773 | case SNDRV_PCM_STATE_SETUP: | |
774 | case SNDRV_PCM_STATE_PREPARED: | |
775 | break; | |
776 | default: | |
777 | snd_pcm_stream_unlock_irq(substream); | |
778 | return -EBADFD; | |
779 | } | |
780 | snd_pcm_stream_unlock_irq(substream); | |
9c323fcb | 781 | if (atomic_read(&substream->mmap_count)) |
1da177e4 LT |
782 | return -EBADFD; |
783 | if (substream->ops->hw_free) | |
784 | result = substream->ops->hw_free(substream); | |
9b0573c0 | 785 | snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN); |
82f68251 | 786 | pm_qos_remove_request(&substream->latency_pm_qos_req); |
1da177e4 LT |
787 | return result; |
788 | } | |
789 | ||
877211f5 TI |
790 | static int snd_pcm_sw_params(struct snd_pcm_substream *substream, |
791 | struct snd_pcm_sw_params *params) | |
1da177e4 | 792 | { |
877211f5 | 793 | struct snd_pcm_runtime *runtime; |
1250932e | 794 | int err; |
1da177e4 | 795 | |
7eaa943c TI |
796 | if (PCM_RUNTIME_CHECK(substream)) |
797 | return -ENXIO; | |
1da177e4 | 798 | runtime = substream->runtime; |
1da177e4 LT |
799 | snd_pcm_stream_lock_irq(substream); |
800 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { | |
801 | snd_pcm_stream_unlock_irq(substream); | |
802 | return -EBADFD; | |
803 | } | |
804 | snd_pcm_stream_unlock_irq(substream); | |
805 | ||
145d92e7 DC |
806 | if (params->tstamp_mode < 0 || |
807 | params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST) | |
1da177e4 | 808 | return -EINVAL; |
58900810 TI |
809 | if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12) && |
810 | params->tstamp_type > SNDRV_PCM_TSTAMP_TYPE_LAST) | |
5646eda5 | 811 | return -EINVAL; |
1da177e4 LT |
812 | if (params->avail_min == 0) |
813 | return -EINVAL; | |
1da177e4 LT |
814 | if (params->silence_size >= runtime->boundary) { |
815 | if (params->silence_threshold != 0) | |
816 | return -EINVAL; | |
817 | } else { | |
818 | if (params->silence_size > params->silence_threshold) | |
819 | return -EINVAL; | |
820 | if (params->silence_threshold > runtime->buffer_size) | |
821 | return -EINVAL; | |
822 | } | |
1250932e | 823 | err = 0; |
1da177e4 LT |
824 | snd_pcm_stream_lock_irq(substream); |
825 | runtime->tstamp_mode = params->tstamp_mode; | |
58900810 TI |
826 | if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12)) |
827 | runtime->tstamp_type = params->tstamp_type; | |
1da177e4 LT |
828 | runtime->period_step = params->period_step; |
829 | runtime->control->avail_min = params->avail_min; | |
830 | runtime->start_threshold = params->start_threshold; | |
831 | runtime->stop_threshold = params->stop_threshold; | |
832 | runtime->silence_threshold = params->silence_threshold; | |
833 | runtime->silence_size = params->silence_size; | |
1da177e4 LT |
834 | params->boundary = runtime->boundary; |
835 | if (snd_pcm_running(substream)) { | |
1da177e4 LT |
836 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && |
837 | runtime->silence_size > 0) | |
838 | snd_pcm_playback_silence(substream, ULONG_MAX); | |
1250932e | 839 | err = snd_pcm_update_state(substream, runtime); |
1da177e4 LT |
840 | } |
841 | snd_pcm_stream_unlock_irq(substream); | |
1250932e | 842 | return err; |
1da177e4 LT |
843 | } |
844 | ||
877211f5 TI |
845 | static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream, |
846 | struct snd_pcm_sw_params __user * _params) | |
1da177e4 | 847 | { |
877211f5 | 848 | struct snd_pcm_sw_params params; |
1da177e4 LT |
849 | int err; |
850 | if (copy_from_user(¶ms, _params, sizeof(params))) | |
851 | return -EFAULT; | |
852 | err = snd_pcm_sw_params(substream, ¶ms); | |
853 | if (copy_to_user(_params, ¶ms, sizeof(params))) | |
854 | return -EFAULT; | |
855 | return err; | |
856 | } | |
857 | ||
877211f5 TI |
858 | int snd_pcm_status(struct snd_pcm_substream *substream, |
859 | struct snd_pcm_status *status) | |
1da177e4 | 860 | { |
877211f5 | 861 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
862 | |
863 | snd_pcm_stream_lock_irq(substream); | |
3179f620 PLB |
864 | |
865 | snd_pcm_unpack_audio_tstamp_config(status->audio_tstamp_data, | |
866 | &runtime->audio_tstamp_config); | |
867 | ||
868 | /* backwards compatible behavior */ | |
869 | if (runtime->audio_tstamp_config.type_requested == | |
870 | SNDRV_PCM_AUDIO_TSTAMP_TYPE_COMPAT) { | |
871 | if (runtime->hw.info & SNDRV_PCM_INFO_HAS_WALL_CLOCK) | |
872 | runtime->audio_tstamp_config.type_requested = | |
873 | SNDRV_PCM_AUDIO_TSTAMP_TYPE_LINK; | |
874 | else | |
875 | runtime->audio_tstamp_config.type_requested = | |
876 | SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT; | |
877 | runtime->audio_tstamp_report.valid = 0; | |
878 | } else | |
879 | runtime->audio_tstamp_report.valid = 1; | |
880 | ||
1da177e4 LT |
881 | status->state = runtime->status->state; |
882 | status->suspended_state = runtime->status->suspended_state; | |
883 | if (status->state == SNDRV_PCM_STATE_OPEN) | |
884 | goto _end; | |
885 | status->trigger_tstamp = runtime->trigger_tstamp; | |
8c121586 | 886 | if (snd_pcm_running(substream)) { |
1da177e4 | 887 | snd_pcm_update_hw_ptr(substream); |
8c121586 JK |
888 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { |
889 | status->tstamp = runtime->status->tstamp; | |
3179f620 | 890 | status->driver_tstamp = runtime->driver_tstamp; |
4eeaaeae PLB |
891 | status->audio_tstamp = |
892 | runtime->status->audio_tstamp; | |
3179f620 PLB |
893 | if (runtime->audio_tstamp_report.valid == 1) |
894 | /* backwards compatibility, no report provided in COMPAT mode */ | |
895 | snd_pcm_pack_audio_tstamp_report(&status->audio_tstamp_data, | |
896 | &status->audio_tstamp_accuracy, | |
897 | &runtime->audio_tstamp_report); | |
898 | ||
8c121586 JK |
899 | goto _tstamp_end; |
900 | } | |
0d59b814 PLB |
901 | } else { |
902 | /* get tstamp only in fallback mode and only if enabled */ | |
903 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) | |
904 | snd_pcm_gettime(runtime, &status->tstamp); | |
8c121586 | 905 | } |
8c121586 | 906 | _tstamp_end: |
1da177e4 LT |
907 | status->appl_ptr = runtime->control->appl_ptr; |
908 | status->hw_ptr = runtime->status->hw_ptr; | |
909 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
910 | status->avail = snd_pcm_playback_avail(runtime); | |
911 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING || | |
4bbe1ddf | 912 | runtime->status->state == SNDRV_PCM_STATE_DRAINING) { |
1da177e4 | 913 | status->delay = runtime->buffer_size - status->avail; |
4bbe1ddf TI |
914 | status->delay += runtime->delay; |
915 | } else | |
1da177e4 LT |
916 | status->delay = 0; |
917 | } else { | |
918 | status->avail = snd_pcm_capture_avail(runtime); | |
919 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) | |
4bbe1ddf | 920 | status->delay = status->avail + runtime->delay; |
1da177e4 LT |
921 | else |
922 | status->delay = 0; | |
923 | } | |
924 | status->avail_max = runtime->avail_max; | |
925 | status->overrange = runtime->overrange; | |
926 | runtime->avail_max = 0; | |
927 | runtime->overrange = 0; | |
928 | _end: | |
929 | snd_pcm_stream_unlock_irq(substream); | |
930 | return 0; | |
931 | } | |
932 | ||
877211f5 | 933 | static int snd_pcm_status_user(struct snd_pcm_substream *substream, |
38ca2a4d PLB |
934 | struct snd_pcm_status __user * _status, |
935 | bool ext) | |
1da177e4 | 936 | { |
877211f5 | 937 | struct snd_pcm_status status; |
1da177e4 | 938 | int res; |
38ca2a4d | 939 | |
1da177e4 | 940 | memset(&status, 0, sizeof(status)); |
38ca2a4d PLB |
941 | /* |
942 | * with extension, parameters are read/write, | |
943 | * get audio_tstamp_data from user, | |
944 | * ignore rest of status structure | |
945 | */ | |
946 | if (ext && get_user(status.audio_tstamp_data, | |
947 | (u32 __user *)(&_status->audio_tstamp_data))) | |
948 | return -EFAULT; | |
1da177e4 LT |
949 | res = snd_pcm_status(substream, &status); |
950 | if (res < 0) | |
951 | return res; | |
952 | if (copy_to_user(_status, &status, sizeof(status))) | |
953 | return -EFAULT; | |
954 | return 0; | |
955 | } | |
956 | ||
877211f5 TI |
957 | static int snd_pcm_channel_info(struct snd_pcm_substream *substream, |
958 | struct snd_pcm_channel_info * info) | |
1da177e4 | 959 | { |
877211f5 | 960 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
961 | unsigned int channel; |
962 | ||
1da177e4 LT |
963 | channel = info->channel; |
964 | runtime = substream->runtime; | |
965 | snd_pcm_stream_lock_irq(substream); | |
966 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { | |
967 | snd_pcm_stream_unlock_irq(substream); | |
968 | return -EBADFD; | |
969 | } | |
970 | snd_pcm_stream_unlock_irq(substream); | |
971 | if (channel >= runtime->channels) | |
972 | return -EINVAL; | |
973 | memset(info, 0, sizeof(*info)); | |
974 | info->channel = channel; | |
975 | return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info); | |
976 | } | |
977 | ||
877211f5 TI |
978 | static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream, |
979 | struct snd_pcm_channel_info __user * _info) | |
1da177e4 | 980 | { |
877211f5 | 981 | struct snd_pcm_channel_info info; |
1da177e4 LT |
982 | int res; |
983 | ||
984 | if (copy_from_user(&info, _info, sizeof(info))) | |
985 | return -EFAULT; | |
986 | res = snd_pcm_channel_info(substream, &info); | |
987 | if (res < 0) | |
988 | return res; | |
989 | if (copy_to_user(_info, &info, sizeof(info))) | |
990 | return -EFAULT; | |
991 | return 0; | |
992 | } | |
993 | ||
877211f5 | 994 | static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream) |
1da177e4 | 995 | { |
877211f5 | 996 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
997 | if (runtime->trigger_master == NULL) |
998 | return; | |
999 | if (runtime->trigger_master == substream) { | |
2b79d7a6 PLB |
1000 | if (!runtime->trigger_tstamp_latched) |
1001 | snd_pcm_gettime(runtime, &runtime->trigger_tstamp); | |
1da177e4 LT |
1002 | } else { |
1003 | snd_pcm_trigger_tstamp(runtime->trigger_master); | |
1004 | runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp; | |
1005 | } | |
1006 | runtime->trigger_master = NULL; | |
1007 | } | |
1008 | ||
1009 | struct action_ops { | |
877211f5 TI |
1010 | int (*pre_action)(struct snd_pcm_substream *substream, int state); |
1011 | int (*do_action)(struct snd_pcm_substream *substream, int state); | |
1012 | void (*undo_action)(struct snd_pcm_substream *substream, int state); | |
1013 | void (*post_action)(struct snd_pcm_substream *substream, int state); | |
1da177e4 LT |
1014 | }; |
1015 | ||
1016 | /* | |
1017 | * this functions is core for handling of linked stream | |
1018 | * Note: the stream state might be changed also on failure | |
1019 | * Note2: call with calling stream lock + link lock | |
1020 | */ | |
b17154cf | 1021 | static int snd_pcm_action_group(const struct action_ops *ops, |
877211f5 | 1022 | struct snd_pcm_substream *substream, |
1da177e4 LT |
1023 | int state, int do_lock) |
1024 | { | |
877211f5 TI |
1025 | struct snd_pcm_substream *s = NULL; |
1026 | struct snd_pcm_substream *s1; | |
dde1c652 | 1027 | int res = 0, depth = 1; |
1da177e4 | 1028 | |
ef991b95 | 1029 | snd_pcm_group_for_each_entry(s, substream) { |
257f8cce TI |
1030 | if (do_lock && s != substream) { |
1031 | if (s->pcm->nonatomic) | |
dde1c652 | 1032 | mutex_lock_nested(&s->self_group.mutex, depth); |
257f8cce | 1033 | else |
dde1c652 TI |
1034 | spin_lock_nested(&s->self_group.lock, depth); |
1035 | depth++; | |
257f8cce | 1036 | } |
1da177e4 LT |
1037 | res = ops->pre_action(s, state); |
1038 | if (res < 0) | |
1039 | goto _unlock; | |
1040 | } | |
ef991b95 | 1041 | snd_pcm_group_for_each_entry(s, substream) { |
1da177e4 LT |
1042 | res = ops->do_action(s, state); |
1043 | if (res < 0) { | |
1044 | if (ops->undo_action) { | |
ef991b95 | 1045 | snd_pcm_group_for_each_entry(s1, substream) { |
1da177e4 LT |
1046 | if (s1 == s) /* failed stream */ |
1047 | break; | |
1048 | ops->undo_action(s1, state); | |
1049 | } | |
1050 | } | |
1051 | s = NULL; /* unlock all */ | |
1052 | goto _unlock; | |
1053 | } | |
1054 | } | |
ef991b95 | 1055 | snd_pcm_group_for_each_entry(s, substream) { |
1da177e4 LT |
1056 | ops->post_action(s, state); |
1057 | } | |
1058 | _unlock: | |
1059 | if (do_lock) { | |
1060 | /* unlock streams */ | |
ef991b95 | 1061 | snd_pcm_group_for_each_entry(s1, substream) { |
257f8cce | 1062 | if (s1 != substream) { |
811deede | 1063 | if (s1->pcm->nonatomic) |
257f8cce TI |
1064 | mutex_unlock(&s1->self_group.mutex); |
1065 | else | |
1066 | spin_unlock(&s1->self_group.lock); | |
1067 | } | |
1da177e4 LT |
1068 | if (s1 == s) /* end */ |
1069 | break; | |
1070 | } | |
1071 | } | |
1072 | return res; | |
1073 | } | |
1074 | ||
1075 | /* | |
1076 | * Note: call with stream lock | |
1077 | */ | |
b17154cf | 1078 | static int snd_pcm_action_single(const struct action_ops *ops, |
877211f5 | 1079 | struct snd_pcm_substream *substream, |
1da177e4 LT |
1080 | int state) |
1081 | { | |
1082 | int res; | |
1083 | ||
1084 | res = ops->pre_action(substream, state); | |
1085 | if (res < 0) | |
1086 | return res; | |
1087 | res = ops->do_action(substream, state); | |
1088 | if (res == 0) | |
1089 | ops->post_action(substream, state); | |
1090 | else if (ops->undo_action) | |
1091 | ops->undo_action(substream, state); | |
1092 | return res; | |
1093 | } | |
1094 | ||
aa8edd8c TI |
1095 | /* |
1096 | * Note: call with stream lock | |
1097 | */ | |
b17154cf | 1098 | static int snd_pcm_action(const struct action_ops *ops, |
aa8edd8c TI |
1099 | struct snd_pcm_substream *substream, |
1100 | int state) | |
257f8cce TI |
1101 | { |
1102 | int res; | |
1103 | ||
aa8edd8c TI |
1104 | if (!snd_pcm_stream_linked(substream)) |
1105 | return snd_pcm_action_single(ops, substream, state); | |
1106 | ||
1107 | if (substream->pcm->nonatomic) { | |
257f8cce TI |
1108 | if (!mutex_trylock(&substream->group->mutex)) { |
1109 | mutex_unlock(&substream->self_group.mutex); | |
1110 | mutex_lock(&substream->group->mutex); | |
1111 | mutex_lock(&substream->self_group.mutex); | |
1112 | } | |
1113 | res = snd_pcm_action_group(ops, substream, state, 1); | |
1114 | mutex_unlock(&substream->group->mutex); | |
1115 | } else { | |
1da177e4 LT |
1116 | if (!spin_trylock(&substream->group->lock)) { |
1117 | spin_unlock(&substream->self_group.lock); | |
1118 | spin_lock(&substream->group->lock); | |
1119 | spin_lock(&substream->self_group.lock); | |
1120 | } | |
1121 | res = snd_pcm_action_group(ops, substream, state, 1); | |
1122 | spin_unlock(&substream->group->lock); | |
1da177e4 LT |
1123 | } |
1124 | return res; | |
1125 | } | |
1126 | ||
1127 | /* | |
1128 | * Note: don't use any locks before | |
1129 | */ | |
b17154cf | 1130 | static int snd_pcm_action_lock_irq(const struct action_ops *ops, |
877211f5 | 1131 | struct snd_pcm_substream *substream, |
1da177e4 LT |
1132 | int state) |
1133 | { | |
1134 | int res; | |
1135 | ||
e3a4bd5e TI |
1136 | snd_pcm_stream_lock_irq(substream); |
1137 | res = snd_pcm_action(ops, substream, state); | |
1138 | snd_pcm_stream_unlock_irq(substream); | |
1da177e4 LT |
1139 | return res; |
1140 | } | |
1141 | ||
1142 | /* | |
1143 | */ | |
b17154cf | 1144 | static int snd_pcm_action_nonatomic(const struct action_ops *ops, |
877211f5 | 1145 | struct snd_pcm_substream *substream, |
1da177e4 LT |
1146 | int state) |
1147 | { | |
1148 | int res; | |
1149 | ||
1150 | down_read(&snd_pcm_link_rwsem); | |
1151 | if (snd_pcm_stream_linked(substream)) | |
1152 | res = snd_pcm_action_group(ops, substream, state, 0); | |
1153 | else | |
1154 | res = snd_pcm_action_single(ops, substream, state); | |
1155 | up_read(&snd_pcm_link_rwsem); | |
1156 | return res; | |
1157 | } | |
1158 | ||
1159 | /* | |
1160 | * start callbacks | |
1161 | */ | |
877211f5 | 1162 | static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1163 | { |
877211f5 | 1164 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1165 | if (runtime->status->state != SNDRV_PCM_STATE_PREPARED) |
1166 | return -EBADFD; | |
1167 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && | |
1168 | !snd_pcm_playback_data(substream)) | |
1169 | return -EPIPE; | |
2b79d7a6 | 1170 | runtime->trigger_tstamp_latched = false; |
1da177e4 LT |
1171 | runtime->trigger_master = substream; |
1172 | return 0; | |
1173 | } | |
1174 | ||
877211f5 | 1175 | static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1176 | { |
1177 | if (substream->runtime->trigger_master != substream) | |
1178 | return 0; | |
1179 | return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START); | |
1180 | } | |
1181 | ||
877211f5 | 1182 | static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1183 | { |
1184 | if (substream->runtime->trigger_master == substream) | |
1185 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); | |
1186 | } | |
1187 | ||
877211f5 | 1188 | static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1189 | { |
877211f5 | 1190 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 1191 | snd_pcm_trigger_tstamp(substream); |
6af3fb72 | 1192 | runtime->hw_ptr_jiffies = jiffies; |
bd76af0f JK |
1193 | runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) / |
1194 | runtime->rate; | |
1da177e4 LT |
1195 | runtime->status->state = state; |
1196 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && | |
1197 | runtime->silence_size > 0) | |
1198 | snd_pcm_playback_silence(substream, ULONG_MAX); | |
90bbaf66 | 1199 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTART); |
1da177e4 LT |
1200 | } |
1201 | ||
b17154cf | 1202 | static const struct action_ops snd_pcm_action_start = { |
1da177e4 LT |
1203 | .pre_action = snd_pcm_pre_start, |
1204 | .do_action = snd_pcm_do_start, | |
1205 | .undo_action = snd_pcm_undo_start, | |
1206 | .post_action = snd_pcm_post_start | |
1207 | }; | |
1208 | ||
1209 | /** | |
1c85cc64 | 1210 | * snd_pcm_start - start all linked streams |
df8db936 | 1211 | * @substream: the PCM substream instance |
eb7c06e8 YB |
1212 | * |
1213 | * Return: Zero if successful, or a negative error code. | |
c2c86a97 | 1214 | * The stream lock must be acquired before calling this function. |
1da177e4 | 1215 | */ |
877211f5 | 1216 | int snd_pcm_start(struct snd_pcm_substream *substream) |
1da177e4 | 1217 | { |
877211f5 TI |
1218 | return snd_pcm_action(&snd_pcm_action_start, substream, |
1219 | SNDRV_PCM_STATE_RUNNING); | |
1da177e4 LT |
1220 | } |
1221 | ||
c2c86a97 TI |
1222 | /* take the stream lock and start the streams */ |
1223 | static int snd_pcm_start_lock_irq(struct snd_pcm_substream *substream) | |
1224 | { | |
1225 | return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, | |
1226 | SNDRV_PCM_STATE_RUNNING); | |
1227 | } | |
1228 | ||
1da177e4 LT |
1229 | /* |
1230 | * stop callbacks | |
1231 | */ | |
877211f5 | 1232 | static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1233 | { |
877211f5 | 1234 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1235 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
1236 | return -EBADFD; | |
1237 | runtime->trigger_master = substream; | |
1238 | return 0; | |
1239 | } | |
1240 | ||
877211f5 | 1241 | static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1242 | { |
1243 | if (substream->runtime->trigger_master == substream && | |
1244 | snd_pcm_running(substream)) | |
1245 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); | |
1246 | return 0; /* unconditonally stop all substreams */ | |
1247 | } | |
1248 | ||
877211f5 | 1249 | static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1250 | { |
877211f5 | 1251 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1252 | if (runtime->status->state != state) { |
1253 | snd_pcm_trigger_tstamp(substream); | |
9bc889b4 | 1254 | runtime->status->state = state; |
90bbaf66 | 1255 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTOP); |
1da177e4 LT |
1256 | } |
1257 | wake_up(&runtime->sleep); | |
c91a988d | 1258 | wake_up(&runtime->tsleep); |
1da177e4 LT |
1259 | } |
1260 | ||
b17154cf | 1261 | static const struct action_ops snd_pcm_action_stop = { |
1da177e4 LT |
1262 | .pre_action = snd_pcm_pre_stop, |
1263 | .do_action = snd_pcm_do_stop, | |
1264 | .post_action = snd_pcm_post_stop | |
1265 | }; | |
1266 | ||
1267 | /** | |
1c85cc64 | 1268 | * snd_pcm_stop - try to stop all running streams in the substream group |
df8db936 TI |
1269 | * @substream: the PCM substream instance |
1270 | * @state: PCM state after stopping the stream | |
1da177e4 | 1271 | * |
1c85cc64 | 1272 | * The state of each stream is then changed to the given state unconditionally. |
eb7c06e8 | 1273 | * |
0a11458c | 1274 | * Return: Zero if successful, or a negative error code. |
1da177e4 | 1275 | */ |
fea952e5 | 1276 | int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state) |
1da177e4 LT |
1277 | { |
1278 | return snd_pcm_action(&snd_pcm_action_stop, substream, state); | |
1279 | } | |
e88e8ae6 TI |
1280 | EXPORT_SYMBOL(snd_pcm_stop); |
1281 | ||
1da177e4 | 1282 | /** |
1c85cc64 | 1283 | * snd_pcm_drain_done - stop the DMA only when the given stream is playback |
df8db936 | 1284 | * @substream: the PCM substream |
1da177e4 | 1285 | * |
1c85cc64 | 1286 | * After stopping, the state is changed to SETUP. |
1da177e4 | 1287 | * Unlike snd_pcm_stop(), this affects only the given stream. |
eb7c06e8 YB |
1288 | * |
1289 | * Return: Zero if succesful, or a negative error code. | |
1da177e4 | 1290 | */ |
877211f5 | 1291 | int snd_pcm_drain_done(struct snd_pcm_substream *substream) |
1da177e4 | 1292 | { |
877211f5 TI |
1293 | return snd_pcm_action_single(&snd_pcm_action_stop, substream, |
1294 | SNDRV_PCM_STATE_SETUP); | |
1da177e4 LT |
1295 | } |
1296 | ||
1fb8510c TI |
1297 | /** |
1298 | * snd_pcm_stop_xrun - stop the running streams as XRUN | |
1299 | * @substream: the PCM substream instance | |
1fb8510c TI |
1300 | * |
1301 | * This stops the given running substream (and all linked substreams) as XRUN. | |
1302 | * Unlike snd_pcm_stop(), this function takes the substream lock by itself. | |
1303 | * | |
1304 | * Return: Zero if successful, or a negative error code. | |
1305 | */ | |
1306 | int snd_pcm_stop_xrun(struct snd_pcm_substream *substream) | |
1307 | { | |
1308 | unsigned long flags; | |
1309 | int ret = 0; | |
1310 | ||
1311 | snd_pcm_stream_lock_irqsave(substream, flags); | |
1312 | if (snd_pcm_running(substream)) | |
1313 | ret = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); | |
1314 | snd_pcm_stream_unlock_irqrestore(substream, flags); | |
1315 | return ret; | |
1316 | } | |
1317 | EXPORT_SYMBOL_GPL(snd_pcm_stop_xrun); | |
1318 | ||
1da177e4 LT |
1319 | /* |
1320 | * pause callbacks | |
1321 | */ | |
877211f5 | 1322 | static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push) |
1da177e4 | 1323 | { |
877211f5 | 1324 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1325 | if (!(runtime->info & SNDRV_PCM_INFO_PAUSE)) |
1326 | return -ENOSYS; | |
1327 | if (push) { | |
1328 | if (runtime->status->state != SNDRV_PCM_STATE_RUNNING) | |
1329 | return -EBADFD; | |
1330 | } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED) | |
1331 | return -EBADFD; | |
1332 | runtime->trigger_master = substream; | |
1333 | return 0; | |
1334 | } | |
1335 | ||
877211f5 | 1336 | static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push) |
1da177e4 LT |
1337 | { |
1338 | if (substream->runtime->trigger_master != substream) | |
1339 | return 0; | |
56385a12 JK |
1340 | /* some drivers might use hw_ptr to recover from the pause - |
1341 | update the hw_ptr now */ | |
1342 | if (push) | |
1343 | snd_pcm_update_hw_ptr(substream); | |
6af3fb72 | 1344 | /* The jiffies check in snd_pcm_update_hw_ptr*() is done by |
b595076a | 1345 | * a delta between the current jiffies, this gives a large enough |
6af3fb72 TI |
1346 | * delta, effectively to skip the check once. |
1347 | */ | |
1348 | substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000; | |
1da177e4 LT |
1349 | return substream->ops->trigger(substream, |
1350 | push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH : | |
1351 | SNDRV_PCM_TRIGGER_PAUSE_RELEASE); | |
1352 | } | |
1353 | ||
877211f5 | 1354 | static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push) |
1da177e4 LT |
1355 | { |
1356 | if (substream->runtime->trigger_master == substream) | |
1357 | substream->ops->trigger(substream, | |
1358 | push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE : | |
1359 | SNDRV_PCM_TRIGGER_PAUSE_PUSH); | |
1360 | } | |
1361 | ||
877211f5 | 1362 | static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push) |
1da177e4 | 1363 | { |
877211f5 | 1364 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1365 | snd_pcm_trigger_tstamp(substream); |
1366 | if (push) { | |
1367 | runtime->status->state = SNDRV_PCM_STATE_PAUSED; | |
90bbaf66 | 1368 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MPAUSE); |
1da177e4 | 1369 | wake_up(&runtime->sleep); |
c91a988d | 1370 | wake_up(&runtime->tsleep); |
1da177e4 LT |
1371 | } else { |
1372 | runtime->status->state = SNDRV_PCM_STATE_RUNNING; | |
90bbaf66 | 1373 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MCONTINUE); |
1da177e4 LT |
1374 | } |
1375 | } | |
1376 | ||
b17154cf | 1377 | static const struct action_ops snd_pcm_action_pause = { |
1da177e4 LT |
1378 | .pre_action = snd_pcm_pre_pause, |
1379 | .do_action = snd_pcm_do_pause, | |
1380 | .undo_action = snd_pcm_undo_pause, | |
1381 | .post_action = snd_pcm_post_pause | |
1382 | }; | |
1383 | ||
1384 | /* | |
1385 | * Push/release the pause for all linked streams. | |
1386 | */ | |
877211f5 | 1387 | static int snd_pcm_pause(struct snd_pcm_substream *substream, int push) |
1da177e4 LT |
1388 | { |
1389 | return snd_pcm_action(&snd_pcm_action_pause, substream, push); | |
1390 | } | |
1391 | ||
1392 | #ifdef CONFIG_PM | |
1393 | /* suspend */ | |
1394 | ||
877211f5 | 1395 | static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1396 | { |
877211f5 | 1397 | struct snd_pcm_runtime *runtime = substream->runtime; |
6182bdf0 TI |
1398 | switch (runtime->status->state) { |
1399 | case SNDRV_PCM_STATE_SUSPENDED: | |
1da177e4 | 1400 | return -EBUSY; |
6182bdf0 TI |
1401 | /* unresumable PCM state; return -EBUSY for skipping suspend */ |
1402 | case SNDRV_PCM_STATE_OPEN: | |
1403 | case SNDRV_PCM_STATE_SETUP: | |
1404 | case SNDRV_PCM_STATE_DISCONNECTED: | |
1405 | return -EBUSY; | |
1406 | } | |
1da177e4 LT |
1407 | runtime->trigger_master = substream; |
1408 | return 0; | |
1409 | } | |
1410 | ||
877211f5 | 1411 | static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1412 | { |
877211f5 | 1413 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1414 | if (runtime->trigger_master != substream) |
1415 | return 0; | |
1416 | if (! snd_pcm_running(substream)) | |
1417 | return 0; | |
1418 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); | |
1419 | return 0; /* suspend unconditionally */ | |
1420 | } | |
1421 | ||
877211f5 | 1422 | static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1423 | { |
877211f5 | 1424 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 1425 | snd_pcm_trigger_tstamp(substream); |
9bc889b4 TI |
1426 | runtime->status->suspended_state = runtime->status->state; |
1427 | runtime->status->state = SNDRV_PCM_STATE_SUSPENDED; | |
90bbaf66 | 1428 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSUSPEND); |
1da177e4 | 1429 | wake_up(&runtime->sleep); |
c91a988d | 1430 | wake_up(&runtime->tsleep); |
1da177e4 LT |
1431 | } |
1432 | ||
b17154cf | 1433 | static const struct action_ops snd_pcm_action_suspend = { |
1da177e4 LT |
1434 | .pre_action = snd_pcm_pre_suspend, |
1435 | .do_action = snd_pcm_do_suspend, | |
1436 | .post_action = snd_pcm_post_suspend | |
1437 | }; | |
1438 | ||
1439 | /** | |
1c85cc64 | 1440 | * snd_pcm_suspend - trigger SUSPEND to all linked streams |
df8db936 | 1441 | * @substream: the PCM substream |
1da177e4 | 1442 | * |
1da177e4 | 1443 | * After this call, all streams are changed to SUSPENDED state. |
eb7c06e8 YB |
1444 | * |
1445 | * Return: Zero if successful (or @substream is %NULL), or a negative error | |
1446 | * code. | |
1da177e4 | 1447 | */ |
877211f5 | 1448 | int snd_pcm_suspend(struct snd_pcm_substream *substream) |
1da177e4 LT |
1449 | { |
1450 | int err; | |
1451 | unsigned long flags; | |
1452 | ||
603bf524 TI |
1453 | if (! substream) |
1454 | return 0; | |
1455 | ||
1da177e4 LT |
1456 | snd_pcm_stream_lock_irqsave(substream, flags); |
1457 | err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0); | |
1458 | snd_pcm_stream_unlock_irqrestore(substream, flags); | |
1459 | return err; | |
1460 | } | |
e88e8ae6 TI |
1461 | EXPORT_SYMBOL(snd_pcm_suspend); |
1462 | ||
1da177e4 | 1463 | /** |
1c85cc64 | 1464 | * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm |
df8db936 | 1465 | * @pcm: the PCM instance |
1da177e4 | 1466 | * |
1da177e4 | 1467 | * After this call, all streams are changed to SUSPENDED state. |
eb7c06e8 YB |
1468 | * |
1469 | * Return: Zero if successful (or @pcm is %NULL), or a negative error code. | |
1da177e4 | 1470 | */ |
877211f5 | 1471 | int snd_pcm_suspend_all(struct snd_pcm *pcm) |
1da177e4 | 1472 | { |
877211f5 | 1473 | struct snd_pcm_substream *substream; |
1da177e4 LT |
1474 | int stream, err = 0; |
1475 | ||
603bf524 TI |
1476 | if (! pcm) |
1477 | return 0; | |
1478 | ||
1da177e4 | 1479 | for (stream = 0; stream < 2; stream++) { |
877211f5 TI |
1480 | for (substream = pcm->streams[stream].substream; |
1481 | substream; substream = substream->next) { | |
1da177e4 LT |
1482 | /* FIXME: the open/close code should lock this as well */ |
1483 | if (substream->runtime == NULL) | |
1484 | continue; | |
62ecc64c RS |
1485 | |
1486 | /* | |
1487 | * Skip BE dai link PCM's that are internal and may | |
1488 | * not have their substream ops set. | |
1489 | */ | |
1490 | if (!substream->ops) | |
1491 | continue; | |
1492 | ||
1da177e4 LT |
1493 | err = snd_pcm_suspend(substream); |
1494 | if (err < 0 && err != -EBUSY) | |
1495 | return err; | |
1496 | } | |
1497 | } | |
1498 | return 0; | |
1499 | } | |
e88e8ae6 TI |
1500 | EXPORT_SYMBOL(snd_pcm_suspend_all); |
1501 | ||
1da177e4 LT |
1502 | /* resume */ |
1503 | ||
877211f5 | 1504 | static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1505 | { |
877211f5 | 1506 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1507 | if (!(runtime->info & SNDRV_PCM_INFO_RESUME)) |
1508 | return -ENOSYS; | |
1509 | runtime->trigger_master = substream; | |
1510 | return 0; | |
1511 | } | |
1512 | ||
877211f5 | 1513 | static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1514 | { |
877211f5 | 1515 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1516 | if (runtime->trigger_master != substream) |
1517 | return 0; | |
1518 | /* DMA not running previously? */ | |
1519 | if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING && | |
1520 | (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING || | |
1521 | substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) | |
1522 | return 0; | |
1523 | return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME); | |
1524 | } | |
1525 | ||
877211f5 | 1526 | static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1527 | { |
1528 | if (substream->runtime->trigger_master == substream && | |
1529 | snd_pcm_running(substream)) | |
1530 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); | |
1531 | } | |
1532 | ||
877211f5 | 1533 | static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1534 | { |
877211f5 | 1535 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 1536 | snd_pcm_trigger_tstamp(substream); |
9bc889b4 | 1537 | runtime->status->state = runtime->status->suspended_state; |
90bbaf66 | 1538 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MRESUME); |
1da177e4 LT |
1539 | } |
1540 | ||
b17154cf | 1541 | static const struct action_ops snd_pcm_action_resume = { |
1da177e4 LT |
1542 | .pre_action = snd_pcm_pre_resume, |
1543 | .do_action = snd_pcm_do_resume, | |
1544 | .undo_action = snd_pcm_undo_resume, | |
1545 | .post_action = snd_pcm_post_resume | |
1546 | }; | |
1547 | ||
877211f5 | 1548 | static int snd_pcm_resume(struct snd_pcm_substream *substream) |
1da177e4 | 1549 | { |
68b4acd3 | 1550 | return snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0); |
1da177e4 LT |
1551 | } |
1552 | ||
1553 | #else | |
1554 | ||
877211f5 | 1555 | static int snd_pcm_resume(struct snd_pcm_substream *substream) |
1da177e4 LT |
1556 | { |
1557 | return -ENOSYS; | |
1558 | } | |
1559 | ||
1560 | #endif /* CONFIG_PM */ | |
1561 | ||
1562 | /* | |
1563 | * xrun ioctl | |
1564 | * | |
1565 | * Change the RUNNING stream(s) to XRUN state. | |
1566 | */ | |
877211f5 | 1567 | static int snd_pcm_xrun(struct snd_pcm_substream *substream) |
1da177e4 | 1568 | { |
877211f5 | 1569 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1570 | int result; |
1571 | ||
1da177e4 LT |
1572 | snd_pcm_stream_lock_irq(substream); |
1573 | switch (runtime->status->state) { | |
1574 | case SNDRV_PCM_STATE_XRUN: | |
1575 | result = 0; /* already there */ | |
1576 | break; | |
1577 | case SNDRV_PCM_STATE_RUNNING: | |
1578 | result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); | |
1579 | break; | |
1580 | default: | |
1581 | result = -EBADFD; | |
1582 | } | |
1583 | snd_pcm_stream_unlock_irq(substream); | |
1da177e4 LT |
1584 | return result; |
1585 | } | |
1586 | ||
1587 | /* | |
1588 | * reset ioctl | |
1589 | */ | |
877211f5 | 1590 | static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1591 | { |
877211f5 | 1592 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1593 | switch (runtime->status->state) { |
1594 | case SNDRV_PCM_STATE_RUNNING: | |
1595 | case SNDRV_PCM_STATE_PREPARED: | |
1596 | case SNDRV_PCM_STATE_PAUSED: | |
1597 | case SNDRV_PCM_STATE_SUSPENDED: | |
1598 | return 0; | |
1599 | default: | |
1600 | return -EBADFD; | |
1601 | } | |
1602 | } | |
1603 | ||
877211f5 | 1604 | static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1605 | { |
877211f5 | 1606 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1607 | int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL); |
1608 | if (err < 0) | |
1609 | return err; | |
1da177e4 | 1610 | runtime->hw_ptr_base = 0; |
e7636925 JK |
1611 | runtime->hw_ptr_interrupt = runtime->status->hw_ptr - |
1612 | runtime->status->hw_ptr % runtime->period_size; | |
1da177e4 LT |
1613 | runtime->silence_start = runtime->status->hw_ptr; |
1614 | runtime->silence_filled = 0; | |
1615 | return 0; | |
1616 | } | |
1617 | ||
877211f5 | 1618 | static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1619 | { |
877211f5 | 1620 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1621 | runtime->control->appl_ptr = runtime->status->hw_ptr; |
1622 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && | |
1623 | runtime->silence_size > 0) | |
1624 | snd_pcm_playback_silence(substream, ULONG_MAX); | |
1625 | } | |
1626 | ||
b17154cf | 1627 | static const struct action_ops snd_pcm_action_reset = { |
1da177e4 LT |
1628 | .pre_action = snd_pcm_pre_reset, |
1629 | .do_action = snd_pcm_do_reset, | |
1630 | .post_action = snd_pcm_post_reset | |
1631 | }; | |
1632 | ||
877211f5 | 1633 | static int snd_pcm_reset(struct snd_pcm_substream *substream) |
1da177e4 LT |
1634 | { |
1635 | return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0); | |
1636 | } | |
1637 | ||
1638 | /* | |
1639 | * prepare ioctl | |
1640 | */ | |
0df63e44 TI |
1641 | /* we use the second argument for updating f_flags */ |
1642 | static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream, | |
1643 | int f_flags) | |
1da177e4 | 1644 | { |
877211f5 | 1645 | struct snd_pcm_runtime *runtime = substream->runtime; |
de1b8b93 TI |
1646 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN || |
1647 | runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED) | |
1da177e4 LT |
1648 | return -EBADFD; |
1649 | if (snd_pcm_running(substream)) | |
1650 | return -EBUSY; | |
0df63e44 | 1651 | substream->f_flags = f_flags; |
1da177e4 LT |
1652 | return 0; |
1653 | } | |
1654 | ||
877211f5 | 1655 | static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1656 | { |
1657 | int err; | |
1658 | err = substream->ops->prepare(substream); | |
1659 | if (err < 0) | |
1660 | return err; | |
1661 | return snd_pcm_do_reset(substream, 0); | |
1662 | } | |
1663 | ||
877211f5 | 1664 | static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1665 | { |
877211f5 | 1666 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 1667 | runtime->control->appl_ptr = runtime->status->hw_ptr; |
9b0573c0 | 1668 | snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED); |
1da177e4 LT |
1669 | } |
1670 | ||
b17154cf | 1671 | static const struct action_ops snd_pcm_action_prepare = { |
1da177e4 LT |
1672 | .pre_action = snd_pcm_pre_prepare, |
1673 | .do_action = snd_pcm_do_prepare, | |
1674 | .post_action = snd_pcm_post_prepare | |
1675 | }; | |
1676 | ||
1677 | /** | |
1c85cc64 | 1678 | * snd_pcm_prepare - prepare the PCM substream to be triggerable |
df8db936 | 1679 | * @substream: the PCM substream instance |
0df63e44 | 1680 | * @file: file to refer f_flags |
eb7c06e8 YB |
1681 | * |
1682 | * Return: Zero if successful, or a negative error code. | |
1da177e4 | 1683 | */ |
0df63e44 TI |
1684 | static int snd_pcm_prepare(struct snd_pcm_substream *substream, |
1685 | struct file *file) | |
1da177e4 | 1686 | { |
0df63e44 TI |
1687 | int f_flags; |
1688 | ||
1689 | if (file) | |
1690 | f_flags = file->f_flags; | |
1691 | else | |
1692 | f_flags = substream->f_flags; | |
1da177e4 | 1693 | |
1b745cd9 TI |
1694 | snd_pcm_stream_lock_irq(substream); |
1695 | switch (substream->runtime->status->state) { | |
1696 | case SNDRV_PCM_STATE_PAUSED: | |
1697 | snd_pcm_pause(substream, 0); | |
1698 | /* fallthru */ | |
1699 | case SNDRV_PCM_STATE_SUSPENDED: | |
1700 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); | |
1701 | break; | |
1702 | } | |
1703 | snd_pcm_stream_unlock_irq(substream); | |
1704 | ||
68b4acd3 TI |
1705 | return snd_pcm_action_nonatomic(&snd_pcm_action_prepare, |
1706 | substream, f_flags); | |
1da177e4 LT |
1707 | } |
1708 | ||
1709 | /* | |
1710 | * drain ioctl | |
1711 | */ | |
1712 | ||
877211f5 | 1713 | static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1714 | { |
4f7c39dc TI |
1715 | struct snd_pcm_runtime *runtime = substream->runtime; |
1716 | switch (runtime->status->state) { | |
1717 | case SNDRV_PCM_STATE_OPEN: | |
1718 | case SNDRV_PCM_STATE_DISCONNECTED: | |
1719 | case SNDRV_PCM_STATE_SUSPENDED: | |
1720 | return -EBADFD; | |
1721 | } | |
1722 | runtime->trigger_master = substream; | |
1da177e4 LT |
1723 | return 0; |
1724 | } | |
1725 | ||
877211f5 | 1726 | static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1727 | { |
877211f5 | 1728 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1729 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
1730 | switch (runtime->status->state) { | |
1731 | case SNDRV_PCM_STATE_PREPARED: | |
1732 | /* start playback stream if possible */ | |
1733 | if (! snd_pcm_playback_empty(substream)) { | |
1734 | snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING); | |
1735 | snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING); | |
70372a75 TI |
1736 | } else { |
1737 | runtime->status->state = SNDRV_PCM_STATE_SETUP; | |
1da177e4 LT |
1738 | } |
1739 | break; | |
1740 | case SNDRV_PCM_STATE_RUNNING: | |
1741 | runtime->status->state = SNDRV_PCM_STATE_DRAINING; | |
1742 | break; | |
4f7c39dc TI |
1743 | case SNDRV_PCM_STATE_XRUN: |
1744 | runtime->status->state = SNDRV_PCM_STATE_SETUP; | |
1745 | break; | |
1da177e4 LT |
1746 | default: |
1747 | break; | |
1748 | } | |
1749 | } else { | |
1750 | /* stop running stream */ | |
1751 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) { | |
b05e5787 | 1752 | int new_state = snd_pcm_capture_avail(runtime) > 0 ? |
1da177e4 | 1753 | SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP; |
b05e5787 MŚ |
1754 | snd_pcm_do_stop(substream, new_state); |
1755 | snd_pcm_post_stop(substream, new_state); | |
1da177e4 LT |
1756 | } |
1757 | } | |
48d88297 LY |
1758 | |
1759 | if (runtime->status->state == SNDRV_PCM_STATE_DRAINING && | |
1760 | runtime->trigger_master == substream && | |
1761 | (runtime->hw.info & SNDRV_PCM_INFO_DRAIN_TRIGGER)) | |
1762 | return substream->ops->trigger(substream, | |
1763 | SNDRV_PCM_TRIGGER_DRAIN); | |
1764 | ||
1da177e4 LT |
1765 | return 0; |
1766 | } | |
1767 | ||
877211f5 | 1768 | static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1769 | { |
1770 | } | |
1771 | ||
b17154cf | 1772 | static const struct action_ops snd_pcm_action_drain_init = { |
1da177e4 LT |
1773 | .pre_action = snd_pcm_pre_drain_init, |
1774 | .do_action = snd_pcm_do_drain_init, | |
1775 | .post_action = snd_pcm_post_drain_init | |
1776 | }; | |
1777 | ||
877211f5 | 1778 | static int snd_pcm_drop(struct snd_pcm_substream *substream); |
1da177e4 LT |
1779 | |
1780 | /* | |
1781 | * Drain the stream(s). | |
1782 | * When the substream is linked, sync until the draining of all playback streams | |
1783 | * is finished. | |
1784 | * After this call, all streams are supposed to be either SETUP or DRAINING | |
1785 | * (capture only) state. | |
1786 | */ | |
4cdc115f TI |
1787 | static int snd_pcm_drain(struct snd_pcm_substream *substream, |
1788 | struct file *file) | |
1da177e4 | 1789 | { |
877211f5 TI |
1790 | struct snd_card *card; |
1791 | struct snd_pcm_runtime *runtime; | |
ef991b95 | 1792 | struct snd_pcm_substream *s; |
ac6424b9 | 1793 | wait_queue_entry_t wait; |
1da177e4 | 1794 | int result = 0; |
4cdc115f | 1795 | int nonblock = 0; |
1da177e4 | 1796 | |
1da177e4 LT |
1797 | card = substream->pcm->card; |
1798 | runtime = substream->runtime; | |
1799 | ||
1800 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
1801 | return -EBADFD; | |
1802 | ||
4cdc115f TI |
1803 | if (file) { |
1804 | if (file->f_flags & O_NONBLOCK) | |
1805 | nonblock = 1; | |
1806 | } else if (substream->f_flags & O_NONBLOCK) | |
1807 | nonblock = 1; | |
1808 | ||
21cb2a2e | 1809 | down_read(&snd_pcm_link_rwsem); |
21cb2a2e TI |
1810 | snd_pcm_stream_lock_irq(substream); |
1811 | /* resume pause */ | |
d3a7dcfe | 1812 | if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) |
21cb2a2e TI |
1813 | snd_pcm_pause(substream, 0); |
1814 | ||
1815 | /* pre-start/stop - all running streams are changed to DRAINING state */ | |
1816 | result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0); | |
4cdc115f TI |
1817 | if (result < 0) |
1818 | goto unlock; | |
1819 | /* in non-blocking, we don't wait in ioctl but let caller poll */ | |
1820 | if (nonblock) { | |
1821 | result = -EAGAIN; | |
1822 | goto unlock; | |
21cb2a2e | 1823 | } |
1da177e4 LT |
1824 | |
1825 | for (;;) { | |
1826 | long tout; | |
d3a7dcfe | 1827 | struct snd_pcm_runtime *to_check; |
1da177e4 LT |
1828 | if (signal_pending(current)) { |
1829 | result = -ERESTARTSYS; | |
1830 | break; | |
1831 | } | |
d3a7dcfe TI |
1832 | /* find a substream to drain */ |
1833 | to_check = NULL; | |
1834 | snd_pcm_group_for_each_entry(s, substream) { | |
1835 | if (s->stream != SNDRV_PCM_STREAM_PLAYBACK) | |
1836 | continue; | |
1837 | runtime = s->runtime; | |
1838 | if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { | |
1839 | to_check = runtime; | |
21cb2a2e | 1840 | break; |
d3a7dcfe | 1841 | } |
21cb2a2e | 1842 | } |
d3a7dcfe TI |
1843 | if (!to_check) |
1844 | break; /* all drained */ | |
1845 | init_waitqueue_entry(&wait, current); | |
1846 | add_wait_queue(&to_check->sleep, &wait); | |
1da177e4 | 1847 | snd_pcm_stream_unlock_irq(substream); |
d3a7dcfe | 1848 | up_read(&snd_pcm_link_rwsem); |
f2b3614c TI |
1849 | if (runtime->no_period_wakeup) |
1850 | tout = MAX_SCHEDULE_TIMEOUT; | |
1851 | else { | |
1852 | tout = 10; | |
1853 | if (runtime->rate) { | |
1854 | long t = runtime->period_size * 2 / runtime->rate; | |
1855 | tout = max(t, tout); | |
1856 | } | |
1857 | tout = msecs_to_jiffies(tout * 1000); | |
1858 | } | |
1859 | tout = schedule_timeout_interruptible(tout); | |
d3a7dcfe | 1860 | down_read(&snd_pcm_link_rwsem); |
1da177e4 | 1861 | snd_pcm_stream_lock_irq(substream); |
d3a7dcfe | 1862 | remove_wait_queue(&to_check->sleep, &wait); |
0914f796 TI |
1863 | if (card->shutdown) { |
1864 | result = -ENODEV; | |
1865 | break; | |
1866 | } | |
1da177e4 LT |
1867 | if (tout == 0) { |
1868 | if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) | |
1869 | result = -ESTRPIPE; | |
1870 | else { | |
09e56df8 TI |
1871 | dev_dbg(substream->pcm->card->dev, |
1872 | "playback drain error (DMA or IRQ trouble?)\n"); | |
1da177e4 LT |
1873 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); |
1874 | result = -EIO; | |
1875 | } | |
1876 | break; | |
1877 | } | |
1da177e4 | 1878 | } |
21cb2a2e | 1879 | |
4cdc115f | 1880 | unlock: |
21cb2a2e | 1881 | snd_pcm_stream_unlock_irq(substream); |
d3a7dcfe | 1882 | up_read(&snd_pcm_link_rwsem); |
1da177e4 LT |
1883 | |
1884 | return result; | |
1885 | } | |
1886 | ||
1887 | /* | |
1888 | * drop ioctl | |
1889 | * | |
1890 | * Immediately put all linked substreams into SETUP state. | |
1891 | */ | |
877211f5 | 1892 | static int snd_pcm_drop(struct snd_pcm_substream *substream) |
1da177e4 | 1893 | { |
877211f5 | 1894 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
1895 | int result = 0; |
1896 | ||
7eaa943c TI |
1897 | if (PCM_RUNTIME_CHECK(substream)) |
1898 | return -ENXIO; | |
1da177e4 | 1899 | runtime = substream->runtime; |
1da177e4 | 1900 | |
de1b8b93 | 1901 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN || |
4b95ff78 | 1902 | runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED) |
1da177e4 LT |
1903 | return -EBADFD; |
1904 | ||
1da177e4 LT |
1905 | snd_pcm_stream_lock_irq(substream); |
1906 | /* resume pause */ | |
1907 | if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) | |
1908 | snd_pcm_pause(substream, 0); | |
1909 | ||
1910 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); | |
1911 | /* runtime->control->appl_ptr = runtime->status->hw_ptr; */ | |
1912 | snd_pcm_stream_unlock_irq(substream); | |
24e8fc49 | 1913 | |
1da177e4 LT |
1914 | return result; |
1915 | } | |
1916 | ||
1917 | ||
0888c321 | 1918 | static bool is_pcm_file(struct file *file) |
1da177e4 | 1919 | { |
0888c321 | 1920 | struct inode *inode = file_inode(file); |
f87135f5 CL |
1921 | unsigned int minor; |
1922 | ||
0888c321 AV |
1923 | if (!S_ISCHR(inode->i_mode) || imajor(inode) != snd_major) |
1924 | return false; | |
1da177e4 | 1925 | minor = iminor(inode); |
0888c321 AV |
1926 | return snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) || |
1927 | snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE); | |
1da177e4 LT |
1928 | } |
1929 | ||
1930 | /* | |
1931 | * PCM link handling | |
1932 | */ | |
877211f5 | 1933 | static int snd_pcm_link(struct snd_pcm_substream *substream, int fd) |
1da177e4 LT |
1934 | { |
1935 | int res = 0; | |
877211f5 TI |
1936 | struct snd_pcm_file *pcm_file; |
1937 | struct snd_pcm_substream *substream1; | |
1662591b | 1938 | struct snd_pcm_group *group; |
0888c321 | 1939 | struct fd f = fdget(fd); |
1da177e4 | 1940 | |
0888c321 | 1941 | if (!f.file) |
1da177e4 | 1942 | return -EBADFD; |
0888c321 AV |
1943 | if (!is_pcm_file(f.file)) { |
1944 | res = -EBADFD; | |
1945 | goto _badf; | |
1946 | } | |
1947 | pcm_file = f.file->private_data; | |
1da177e4 | 1948 | substream1 = pcm_file->substream; |
1662591b TI |
1949 | group = kmalloc(sizeof(*group), GFP_KERNEL); |
1950 | if (!group) { | |
1951 | res = -ENOMEM; | |
1952 | goto _nolock; | |
1953 | } | |
108ab9ea | 1954 | down_write_nonfifo(&snd_pcm_link_rwsem); |
1da177e4 LT |
1955 | write_lock_irq(&snd_pcm_link_rwlock); |
1956 | if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN || | |
257f8cce TI |
1957 | substream->runtime->status->state != substream1->runtime->status->state || |
1958 | substream->pcm->nonatomic != substream1->pcm->nonatomic) { | |
1da177e4 LT |
1959 | res = -EBADFD; |
1960 | goto _end; | |
1961 | } | |
1962 | if (snd_pcm_stream_linked(substream1)) { | |
1963 | res = -EALREADY; | |
1964 | goto _end; | |
1965 | } | |
1966 | if (!snd_pcm_stream_linked(substream)) { | |
1662591b | 1967 | substream->group = group; |
dd6c5cd8 | 1968 | group = NULL; |
1da177e4 | 1969 | spin_lock_init(&substream->group->lock); |
257f8cce | 1970 | mutex_init(&substream->group->mutex); |
1da177e4 LT |
1971 | INIT_LIST_HEAD(&substream->group->substreams); |
1972 | list_add_tail(&substream->link_list, &substream->group->substreams); | |
1973 | substream->group->count = 1; | |
1974 | } | |
1975 | list_add_tail(&substream1->link_list, &substream->group->substreams); | |
1976 | substream->group->count++; | |
1977 | substream1->group = substream->group; | |
1978 | _end: | |
1979 | write_unlock_irq(&snd_pcm_link_rwlock); | |
1980 | up_write(&snd_pcm_link_rwsem); | |
1662591b | 1981 | _nolock: |
a0830dbd | 1982 | snd_card_unref(substream1->pcm->card); |
dd6c5cd8 | 1983 | kfree(group); |
0888c321 AV |
1984 | _badf: |
1985 | fdput(f); | |
1da177e4 LT |
1986 | return res; |
1987 | } | |
1988 | ||
877211f5 | 1989 | static void relink_to_local(struct snd_pcm_substream *substream) |
1da177e4 LT |
1990 | { |
1991 | substream->group = &substream->self_group; | |
1992 | INIT_LIST_HEAD(&substream->self_group.substreams); | |
1993 | list_add_tail(&substream->link_list, &substream->self_group.substreams); | |
1994 | } | |
1995 | ||
877211f5 | 1996 | static int snd_pcm_unlink(struct snd_pcm_substream *substream) |
1da177e4 | 1997 | { |
ef991b95 | 1998 | struct snd_pcm_substream *s; |
1da177e4 LT |
1999 | int res = 0; |
2000 | ||
108ab9ea | 2001 | down_write_nonfifo(&snd_pcm_link_rwsem); |
1da177e4 LT |
2002 | write_lock_irq(&snd_pcm_link_rwlock); |
2003 | if (!snd_pcm_stream_linked(substream)) { | |
2004 | res = -EALREADY; | |
2005 | goto _end; | |
2006 | } | |
2007 | list_del(&substream->link_list); | |
2008 | substream->group->count--; | |
2009 | if (substream->group->count == 1) { /* detach the last stream, too */ | |
ef991b95 TI |
2010 | snd_pcm_group_for_each_entry(s, substream) { |
2011 | relink_to_local(s); | |
1da177e4 LT |
2012 | break; |
2013 | } | |
2014 | kfree(substream->group); | |
2015 | } | |
2016 | relink_to_local(substream); | |
2017 | _end: | |
2018 | write_unlock_irq(&snd_pcm_link_rwlock); | |
2019 | up_write(&snd_pcm_link_rwsem); | |
2020 | return res; | |
2021 | } | |
2022 | ||
2023 | /* | |
2024 | * hw configurator | |
2025 | */ | |
877211f5 TI |
2026 | static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params, |
2027 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 2028 | { |
877211f5 | 2029 | struct snd_interval t; |
1da177e4 LT |
2030 | snd_interval_mul(hw_param_interval_c(params, rule->deps[0]), |
2031 | hw_param_interval_c(params, rule->deps[1]), &t); | |
2032 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
2033 | } | |
2034 | ||
877211f5 TI |
2035 | static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params, |
2036 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 2037 | { |
877211f5 | 2038 | struct snd_interval t; |
1da177e4 LT |
2039 | snd_interval_div(hw_param_interval_c(params, rule->deps[0]), |
2040 | hw_param_interval_c(params, rule->deps[1]), &t); | |
2041 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
2042 | } | |
2043 | ||
877211f5 TI |
2044 | static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params, |
2045 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 2046 | { |
877211f5 | 2047 | struct snd_interval t; |
1da177e4 LT |
2048 | snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]), |
2049 | hw_param_interval_c(params, rule->deps[1]), | |
2050 | (unsigned long) rule->private, &t); | |
2051 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
2052 | } | |
2053 | ||
877211f5 TI |
2054 | static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params, |
2055 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 2056 | { |
877211f5 | 2057 | struct snd_interval t; |
1da177e4 LT |
2058 | snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]), |
2059 | (unsigned long) rule->private, | |
2060 | hw_param_interval_c(params, rule->deps[1]), &t); | |
2061 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
2062 | } | |
2063 | ||
877211f5 TI |
2064 | static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params, |
2065 | struct snd_pcm_hw_rule *rule) | |
1da177e4 LT |
2066 | { |
2067 | unsigned int k; | |
b55f9fdc TS |
2068 | const struct snd_interval *i = |
2069 | hw_param_interval_c(params, rule->deps[0]); | |
877211f5 TI |
2070 | struct snd_mask m; |
2071 | struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); | |
1da177e4 LT |
2072 | snd_mask_any(&m); |
2073 | for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { | |
2074 | int bits; | |
2075 | if (! snd_mask_test(mask, k)) | |
2076 | continue; | |
2077 | bits = snd_pcm_format_physical_width(k); | |
2078 | if (bits <= 0) | |
2079 | continue; /* ignore invalid formats */ | |
2080 | if ((unsigned)bits < i->min || (unsigned)bits > i->max) | |
2081 | snd_mask_reset(&m, k); | |
2082 | } | |
2083 | return snd_mask_refine(mask, &m); | |
2084 | } | |
2085 | ||
877211f5 TI |
2086 | static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params, |
2087 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 2088 | { |
877211f5 | 2089 | struct snd_interval t; |
1da177e4 LT |
2090 | unsigned int k; |
2091 | t.min = UINT_MAX; | |
2092 | t.max = 0; | |
2093 | t.openmin = 0; | |
2094 | t.openmax = 0; | |
2095 | for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { | |
2096 | int bits; | |
2097 | if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k)) | |
2098 | continue; | |
2099 | bits = snd_pcm_format_physical_width(k); | |
2100 | if (bits <= 0) | |
2101 | continue; /* ignore invalid formats */ | |
2102 | if (t.min > (unsigned)bits) | |
2103 | t.min = bits; | |
2104 | if (t.max < (unsigned)bits) | |
2105 | t.max = bits; | |
2106 | } | |
2107 | t.integer = 1; | |
2108 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
2109 | } | |
2110 | ||
2111 | #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12 | |
2112 | #error "Change this table" | |
2113 | #endif | |
2114 | ||
8b674308 TS |
2115 | static const unsigned int rates[] = { |
2116 | 5512, 8000, 11025, 16000, 22050, 32000, 44100, | |
2117 | 48000, 64000, 88200, 96000, 176400, 192000 | |
2118 | }; | |
1da177e4 | 2119 | |
7653d557 CL |
2120 | const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = { |
2121 | .count = ARRAY_SIZE(rates), | |
2122 | .list = rates, | |
2123 | }; | |
2124 | ||
877211f5 TI |
2125 | static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params, |
2126 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 2127 | { |
877211f5 | 2128 | struct snd_pcm_hardware *hw = rule->private; |
1da177e4 | 2129 | return snd_interval_list(hw_param_interval(params, rule->var), |
7653d557 CL |
2130 | snd_pcm_known_rates.count, |
2131 | snd_pcm_known_rates.list, hw->rates); | |
1da177e4 LT |
2132 | } |
2133 | ||
877211f5 TI |
2134 | static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params, |
2135 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 2136 | { |
877211f5 TI |
2137 | struct snd_interval t; |
2138 | struct snd_pcm_substream *substream = rule->private; | |
1da177e4 LT |
2139 | t.min = 0; |
2140 | t.max = substream->buffer_bytes_max; | |
2141 | t.openmin = 0; | |
2142 | t.openmax = 0; | |
2143 | t.integer = 1; | |
2144 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
2145 | } | |
2146 | ||
877211f5 | 2147 | int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream) |
1da177e4 | 2148 | { |
877211f5 TI |
2149 | struct snd_pcm_runtime *runtime = substream->runtime; |
2150 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; | |
1da177e4 LT |
2151 | int k, err; |
2152 | ||
2153 | for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { | |
2154 | snd_mask_any(constrs_mask(constrs, k)); | |
2155 | } | |
2156 | ||
2157 | for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { | |
2158 | snd_interval_any(constrs_interval(constrs, k)); | |
2159 | } | |
2160 | ||
2161 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS)); | |
2162 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)); | |
2163 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)); | |
2164 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)); | |
2165 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS)); | |
2166 | ||
2167 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, | |
2168 | snd_pcm_hw_rule_format, NULL, | |
2169 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
2170 | if (err < 0) | |
2171 | return err; | |
2172 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, | |
2173 | snd_pcm_hw_rule_sample_bits, NULL, | |
2174 | SNDRV_PCM_HW_PARAM_FORMAT, | |
2175 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
2176 | if (err < 0) | |
2177 | return err; | |
2178 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, | |
2179 | snd_pcm_hw_rule_div, NULL, | |
2180 | SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); | |
2181 | if (err < 0) | |
2182 | return err; | |
2183 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, | |
2184 | snd_pcm_hw_rule_mul, NULL, | |
2185 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); | |
2186 | if (err < 0) | |
2187 | return err; | |
2188 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, | |
2189 | snd_pcm_hw_rule_mulkdiv, (void*) 8, | |
2190 | SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); | |
2191 | if (err < 0) | |
2192 | return err; | |
2193 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, | |
2194 | snd_pcm_hw_rule_mulkdiv, (void*) 8, | |
2195 | SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1); | |
2196 | if (err < 0) | |
2197 | return err; | |
2198 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, | |
2199 | snd_pcm_hw_rule_div, NULL, | |
2200 | SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
2201 | if (err < 0) | |
2202 | return err; | |
2203 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, | |
2204 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, | |
2205 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1); | |
2206 | if (err < 0) | |
2207 | return err; | |
2208 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, | |
2209 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, | |
2210 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1); | |
2211 | if (err < 0) | |
2212 | return err; | |
2213 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, | |
2214 | snd_pcm_hw_rule_div, NULL, | |
2215 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); | |
2216 | if (err < 0) | |
2217 | return err; | |
2218 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, | |
2219 | snd_pcm_hw_rule_div, NULL, | |
2220 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); | |
2221 | if (err < 0) | |
2222 | return err; | |
2223 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, | |
2224 | snd_pcm_hw_rule_mulkdiv, (void*) 8, | |
2225 | SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); | |
2226 | if (err < 0) | |
2227 | return err; | |
2228 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, | |
2229 | snd_pcm_hw_rule_muldivk, (void*) 1000000, | |
2230 | SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); | |
2231 | if (err < 0) | |
2232 | return err; | |
2233 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
2234 | snd_pcm_hw_rule_mul, NULL, | |
2235 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); | |
2236 | if (err < 0) | |
2237 | return err; | |
2238 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
2239 | snd_pcm_hw_rule_mulkdiv, (void*) 8, | |
2240 | SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); | |
2241 | if (err < 0) | |
2242 | return err; | |
2243 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
2244 | snd_pcm_hw_rule_muldivk, (void*) 1000000, | |
2245 | SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); | |
2246 | if (err < 0) | |
2247 | return err; | |
2248 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, | |
2249 | snd_pcm_hw_rule_muldivk, (void*) 8, | |
2250 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); | |
2251 | if (err < 0) | |
2252 | return err; | |
2253 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, | |
2254 | snd_pcm_hw_rule_muldivk, (void*) 8, | |
2255 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); | |
2256 | if (err < 0) | |
2257 | return err; | |
2258 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME, | |
2259 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, | |
2260 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); | |
2261 | if (err < 0) | |
2262 | return err; | |
2263 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME, | |
2264 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, | |
2265 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); | |
2266 | if (err < 0) | |
2267 | return err; | |
2268 | return 0; | |
2269 | } | |
2270 | ||
877211f5 | 2271 | int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream) |
1da177e4 | 2272 | { |
877211f5 TI |
2273 | struct snd_pcm_runtime *runtime = substream->runtime; |
2274 | struct snd_pcm_hardware *hw = &runtime->hw; | |
1da177e4 LT |
2275 | int err; |
2276 | unsigned int mask = 0; | |
2277 | ||
2278 | if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) | |
2279 | mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED; | |
2280 | if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) | |
2281 | mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED; | |
63825f3a | 2282 | if (hw_support_mmap(substream)) { |
1da177e4 LT |
2283 | if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) |
2284 | mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; | |
2285 | if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) | |
2286 | mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED; | |
2287 | if (hw->info & SNDRV_PCM_INFO_COMPLEX) | |
2288 | mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX; | |
2289 | } | |
2290 | err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask); | |
7eaa943c TI |
2291 | if (err < 0) |
2292 | return err; | |
1da177e4 LT |
2293 | |
2294 | err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats); | |
7eaa943c TI |
2295 | if (err < 0) |
2296 | return err; | |
1da177e4 LT |
2297 | |
2298 | err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD); | |
7eaa943c TI |
2299 | if (err < 0) |
2300 | return err; | |
1da177e4 LT |
2301 | |
2302 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, | |
2303 | hw->channels_min, hw->channels_max); | |
7eaa943c TI |
2304 | if (err < 0) |
2305 | return err; | |
1da177e4 LT |
2306 | |
2307 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE, | |
2308 | hw->rate_min, hw->rate_max); | |
8b90ca08 GL |
2309 | if (err < 0) |
2310 | return err; | |
1da177e4 LT |
2311 | |
2312 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, | |
2313 | hw->period_bytes_min, hw->period_bytes_max); | |
8b90ca08 GL |
2314 | if (err < 0) |
2315 | return err; | |
1da177e4 LT |
2316 | |
2317 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS, | |
2318 | hw->periods_min, hw->periods_max); | |
7eaa943c TI |
2319 | if (err < 0) |
2320 | return err; | |
1da177e4 LT |
2321 | |
2322 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, | |
2323 | hw->period_bytes_min, hw->buffer_bytes_max); | |
7eaa943c TI |
2324 | if (err < 0) |
2325 | return err; | |
1da177e4 LT |
2326 | |
2327 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, | |
2328 | snd_pcm_hw_rule_buffer_bytes_max, substream, | |
2329 | SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1); | |
2330 | if (err < 0) | |
2331 | return err; | |
2332 | ||
2333 | /* FIXME: remove */ | |
2334 | if (runtime->dma_bytes) { | |
2335 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes); | |
7eaa943c | 2336 | if (err < 0) |
6cf95152 | 2337 | return err; |
1da177e4 LT |
2338 | } |
2339 | ||
2340 | if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) { | |
2341 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, | |
2342 | snd_pcm_hw_rule_rate, hw, | |
2343 | SNDRV_PCM_HW_PARAM_RATE, -1); | |
2344 | if (err < 0) | |
2345 | return err; | |
2346 | } | |
2347 | ||
2348 | /* FIXME: this belong to lowlevel */ | |
1da177e4 LT |
2349 | snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE); |
2350 | ||
2351 | return 0; | |
2352 | } | |
2353 | ||
3bf75f9b | 2354 | static void pcm_release_private(struct snd_pcm_substream *substream) |
1da177e4 | 2355 | { |
cabb9539 TI |
2356 | if (snd_pcm_stream_linked(substream)) |
2357 | snd_pcm_unlink(substream); | |
3bf75f9b TI |
2358 | } |
2359 | ||
2360 | void snd_pcm_release_substream(struct snd_pcm_substream *substream) | |
2361 | { | |
0df63e44 TI |
2362 | substream->ref_count--; |
2363 | if (substream->ref_count > 0) | |
2364 | return; | |
2365 | ||
3bf75f9b | 2366 | snd_pcm_drop(substream); |
3bf75f9b | 2367 | if (substream->hw_opened) { |
094435d4 TI |
2368 | if (substream->ops->hw_free && |
2369 | substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) | |
1da177e4 LT |
2370 | substream->ops->hw_free(substream); |
2371 | substream->ops->close(substream); | |
3bf75f9b | 2372 | substream->hw_opened = 0; |
1da177e4 | 2373 | } |
8699a0b6 TI |
2374 | if (pm_qos_request_active(&substream->latency_pm_qos_req)) |
2375 | pm_qos_remove_request(&substream->latency_pm_qos_req); | |
1576274d TI |
2376 | if (substream->pcm_release) { |
2377 | substream->pcm_release(substream); | |
2378 | substream->pcm_release = NULL; | |
2379 | } | |
3bf75f9b TI |
2380 | snd_pcm_detach_substream(substream); |
2381 | } | |
e88e8ae6 TI |
2382 | EXPORT_SYMBOL(snd_pcm_release_substream); |
2383 | ||
3bf75f9b TI |
2384 | int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, |
2385 | struct file *file, | |
2386 | struct snd_pcm_substream **rsubstream) | |
2387 | { | |
2388 | struct snd_pcm_substream *substream; | |
2389 | int err; | |
2390 | ||
2391 | err = snd_pcm_attach_substream(pcm, stream, file, &substream); | |
2392 | if (err < 0) | |
2393 | return err; | |
0df63e44 TI |
2394 | if (substream->ref_count > 1) { |
2395 | *rsubstream = substream; | |
2396 | return 0; | |
2397 | } | |
2398 | ||
3bf75f9b TI |
2399 | err = snd_pcm_hw_constraints_init(substream); |
2400 | if (err < 0) { | |
09e56df8 | 2401 | pcm_dbg(pcm, "snd_pcm_hw_constraints_init failed\n"); |
3bf75f9b TI |
2402 | goto error; |
2403 | } | |
2404 | ||
2405 | if ((err = substream->ops->open(substream)) < 0) | |
2406 | goto error; | |
2407 | ||
2408 | substream->hw_opened = 1; | |
2409 | ||
2410 | err = snd_pcm_hw_constraints_complete(substream); | |
2411 | if (err < 0) { | |
09e56df8 | 2412 | pcm_dbg(pcm, "snd_pcm_hw_constraints_complete failed\n"); |
3bf75f9b TI |
2413 | goto error; |
2414 | } | |
2415 | ||
2416 | *rsubstream = substream; | |
1da177e4 | 2417 | return 0; |
3bf75f9b TI |
2418 | |
2419 | error: | |
2420 | snd_pcm_release_substream(substream); | |
2421 | return err; | |
1da177e4 | 2422 | } |
e88e8ae6 TI |
2423 | EXPORT_SYMBOL(snd_pcm_open_substream); |
2424 | ||
1da177e4 | 2425 | static int snd_pcm_open_file(struct file *file, |
877211f5 | 2426 | struct snd_pcm *pcm, |
ffd3d5c6 | 2427 | int stream) |
1da177e4 | 2428 | { |
877211f5 TI |
2429 | struct snd_pcm_file *pcm_file; |
2430 | struct snd_pcm_substream *substream; | |
3bf75f9b | 2431 | int err; |
1da177e4 | 2432 | |
3bf75f9b TI |
2433 | err = snd_pcm_open_substream(pcm, stream, file, &substream); |
2434 | if (err < 0) | |
2435 | return err; | |
2436 | ||
548a648b TI |
2437 | pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL); |
2438 | if (pcm_file == NULL) { | |
2439 | snd_pcm_release_substream(substream); | |
2440 | return -ENOMEM; | |
2441 | } | |
2442 | pcm_file->substream = substream; | |
2443 | if (substream->ref_count == 1) { | |
0df63e44 TI |
2444 | substream->file = pcm_file; |
2445 | substream->pcm_release = pcm_release_private; | |
1da177e4 | 2446 | } |
1da177e4 | 2447 | file->private_data = pcm_file; |
ffd3d5c6 | 2448 | |
1da177e4 LT |
2449 | return 0; |
2450 | } | |
2451 | ||
f87135f5 CL |
2452 | static int snd_pcm_playback_open(struct inode *inode, struct file *file) |
2453 | { | |
2454 | struct snd_pcm *pcm; | |
02f4865f TI |
2455 | int err = nonseekable_open(inode, file); |
2456 | if (err < 0) | |
2457 | return err; | |
f87135f5 CL |
2458 | pcm = snd_lookup_minor_data(iminor(inode), |
2459 | SNDRV_DEVICE_TYPE_PCM_PLAYBACK); | |
a0830dbd | 2460 | err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK); |
8bb4d9ce TI |
2461 | if (pcm) |
2462 | snd_card_unref(pcm->card); | |
a0830dbd | 2463 | return err; |
f87135f5 CL |
2464 | } |
2465 | ||
2466 | static int snd_pcm_capture_open(struct inode *inode, struct file *file) | |
1da177e4 | 2467 | { |
877211f5 | 2468 | struct snd_pcm *pcm; |
02f4865f TI |
2469 | int err = nonseekable_open(inode, file); |
2470 | if (err < 0) | |
2471 | return err; | |
f87135f5 CL |
2472 | pcm = snd_lookup_minor_data(iminor(inode), |
2473 | SNDRV_DEVICE_TYPE_PCM_CAPTURE); | |
a0830dbd | 2474 | err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE); |
8bb4d9ce TI |
2475 | if (pcm) |
2476 | snd_card_unref(pcm->card); | |
a0830dbd | 2477 | return err; |
f87135f5 CL |
2478 | } |
2479 | ||
2480 | static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream) | |
2481 | { | |
2482 | int err; | |
ac6424b9 | 2483 | wait_queue_entry_t wait; |
1da177e4 | 2484 | |
1da177e4 LT |
2485 | if (pcm == NULL) { |
2486 | err = -ENODEV; | |
2487 | goto __error1; | |
2488 | } | |
2489 | err = snd_card_file_add(pcm->card, file); | |
2490 | if (err < 0) | |
2491 | goto __error1; | |
2492 | if (!try_module_get(pcm->card->module)) { | |
2493 | err = -EFAULT; | |
2494 | goto __error2; | |
2495 | } | |
2496 | init_waitqueue_entry(&wait, current); | |
2497 | add_wait_queue(&pcm->open_wait, &wait); | |
1a60d4c5 | 2498 | mutex_lock(&pcm->open_mutex); |
1da177e4 | 2499 | while (1) { |
ffd3d5c6 | 2500 | err = snd_pcm_open_file(file, pcm, stream); |
1da177e4 LT |
2501 | if (err >= 0) |
2502 | break; | |
2503 | if (err == -EAGAIN) { | |
2504 | if (file->f_flags & O_NONBLOCK) { | |
2505 | err = -EBUSY; | |
2506 | break; | |
2507 | } | |
2508 | } else | |
2509 | break; | |
2510 | set_current_state(TASK_INTERRUPTIBLE); | |
1a60d4c5 | 2511 | mutex_unlock(&pcm->open_mutex); |
1da177e4 | 2512 | schedule(); |
1a60d4c5 | 2513 | mutex_lock(&pcm->open_mutex); |
0914f796 TI |
2514 | if (pcm->card->shutdown) { |
2515 | err = -ENODEV; | |
2516 | break; | |
2517 | } | |
1da177e4 LT |
2518 | if (signal_pending(current)) { |
2519 | err = -ERESTARTSYS; | |
2520 | break; | |
2521 | } | |
2522 | } | |
2523 | remove_wait_queue(&pcm->open_wait, &wait); | |
1a60d4c5 | 2524 | mutex_unlock(&pcm->open_mutex); |
1da177e4 LT |
2525 | if (err < 0) |
2526 | goto __error; | |
2527 | return err; | |
2528 | ||
2529 | __error: | |
2530 | module_put(pcm->card->module); | |
2531 | __error2: | |
2532 | snd_card_file_remove(pcm->card, file); | |
2533 | __error1: | |
2534 | return err; | |
2535 | } | |
2536 | ||
2537 | static int snd_pcm_release(struct inode *inode, struct file *file) | |
2538 | { | |
877211f5 TI |
2539 | struct snd_pcm *pcm; |
2540 | struct snd_pcm_substream *substream; | |
2541 | struct snd_pcm_file *pcm_file; | |
1da177e4 LT |
2542 | |
2543 | pcm_file = file->private_data; | |
2544 | substream = pcm_file->substream; | |
7eaa943c TI |
2545 | if (snd_BUG_ON(!substream)) |
2546 | return -ENXIO; | |
1da177e4 | 2547 | pcm = substream->pcm; |
1a60d4c5 | 2548 | mutex_lock(&pcm->open_mutex); |
3bf75f9b | 2549 | snd_pcm_release_substream(substream); |
548a648b | 2550 | kfree(pcm_file); |
1a60d4c5 | 2551 | mutex_unlock(&pcm->open_mutex); |
1da177e4 LT |
2552 | wake_up(&pcm->open_wait); |
2553 | module_put(pcm->card->module); | |
2554 | snd_card_file_remove(pcm->card, file); | |
2555 | return 0; | |
2556 | } | |
2557 | ||
f839cc1c TI |
2558 | /* check and update PCM state; return 0 or a negative error |
2559 | * call this inside PCM lock | |
2560 | */ | |
2561 | static int do_pcm_hwsync(struct snd_pcm_substream *substream) | |
1da177e4 | 2562 | { |
f839cc1c | 2563 | switch (substream->runtime->status->state) { |
1da177e4 | 2564 | case SNDRV_PCM_STATE_DRAINING: |
f839cc1c TI |
2565 | if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) |
2566 | return -EBADFD; | |
1da177e4 | 2567 | /* Fall through */ |
f839cc1c TI |
2568 | case SNDRV_PCM_STATE_RUNNING: |
2569 | return snd_pcm_update_hw_ptr(substream); | |
2570 | case SNDRV_PCM_STATE_PREPARED: | |
2571 | case SNDRV_PCM_STATE_PAUSED: | |
2572 | return 0; | |
51840409 | 2573 | case SNDRV_PCM_STATE_SUSPENDED: |
f839cc1c TI |
2574 | return -ESTRPIPE; |
2575 | case SNDRV_PCM_STATE_XRUN: | |
2576 | return -EPIPE; | |
1da177e4 | 2577 | default: |
f839cc1c | 2578 | return -EBADFD; |
1da177e4 | 2579 | } |
f839cc1c | 2580 | } |
1da177e4 | 2581 | |
9027c463 | 2582 | /* increase the appl_ptr; returns the processed frames or a negative error */ |
e0327a0f TI |
2583 | static snd_pcm_sframes_t forward_appl_ptr(struct snd_pcm_substream *substream, |
2584 | snd_pcm_uframes_t frames, | |
2585 | snd_pcm_sframes_t avail) | |
2586 | { | |
2587 | struct snd_pcm_runtime *runtime = substream->runtime; | |
2588 | snd_pcm_sframes_t appl_ptr; | |
9027c463 | 2589 | int ret; |
e0327a0f TI |
2590 | |
2591 | if (avail <= 0) | |
2592 | return 0; | |
2593 | if (frames > (snd_pcm_uframes_t)avail) | |
2594 | frames = avail; | |
2595 | appl_ptr = runtime->control->appl_ptr + frames; | |
2596 | if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) | |
2597 | appl_ptr -= runtime->boundary; | |
66e01a5c | 2598 | ret = pcm_lib_apply_appl_ptr(substream, appl_ptr); |
9027c463 | 2599 | return ret < 0 ? ret : frames; |
e0327a0f TI |
2600 | } |
2601 | ||
ef810a3d | 2602 | /* decrease the appl_ptr; returns the processed frames or zero for error */ |
e0327a0f TI |
2603 | static snd_pcm_sframes_t rewind_appl_ptr(struct snd_pcm_substream *substream, |
2604 | snd_pcm_uframes_t frames, | |
2605 | snd_pcm_sframes_t avail) | |
2606 | { | |
2607 | struct snd_pcm_runtime *runtime = substream->runtime; | |
2608 | snd_pcm_sframes_t appl_ptr; | |
9027c463 | 2609 | int ret; |
e0327a0f TI |
2610 | |
2611 | if (avail <= 0) | |
2612 | return 0; | |
2613 | if (frames > (snd_pcm_uframes_t)avail) | |
2614 | frames = avail; | |
1da177e4 LT |
2615 | appl_ptr = runtime->control->appl_ptr - frames; |
2616 | if (appl_ptr < 0) | |
2617 | appl_ptr += runtime->boundary; | |
66e01a5c | 2618 | ret = pcm_lib_apply_appl_ptr(substream, appl_ptr); |
ef810a3d TI |
2619 | /* NOTE: we return zero for errors because PulseAudio gets depressed |
2620 | * upon receiving an error from rewind ioctl and stops processing | |
2621 | * any longer. Returning zero means that no rewind is done, so | |
2622 | * it's not absolutely wrong to answer like that. | |
2623 | */ | |
2624 | return ret < 0 ? 0 : frames; | |
e0327a0f TI |
2625 | } |
2626 | ||
877211f5 TI |
2627 | static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream, |
2628 | snd_pcm_uframes_t frames) | |
1da177e4 | 2629 | { |
877211f5 | 2630 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 2631 | snd_pcm_sframes_t ret; |
1da177e4 LT |
2632 | |
2633 | if (frames == 0) | |
2634 | return 0; | |
2635 | ||
2636 | snd_pcm_stream_lock_irq(substream); | |
f839cc1c | 2637 | ret = do_pcm_hwsync(substream); |
e0327a0f TI |
2638 | if (!ret) |
2639 | ret = rewind_appl_ptr(substream, frames, | |
2640 | snd_pcm_playback_hw_avail(runtime)); | |
1da177e4 LT |
2641 | snd_pcm_stream_unlock_irq(substream); |
2642 | return ret; | |
2643 | } | |
2644 | ||
877211f5 TI |
2645 | static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream, |
2646 | snd_pcm_uframes_t frames) | |
1da177e4 | 2647 | { |
877211f5 | 2648 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 2649 | snd_pcm_sframes_t ret; |
1da177e4 LT |
2650 | |
2651 | if (frames == 0) | |
2652 | return 0; | |
2653 | ||
2654 | snd_pcm_stream_lock_irq(substream); | |
f839cc1c | 2655 | ret = do_pcm_hwsync(substream); |
e0327a0f TI |
2656 | if (!ret) |
2657 | ret = rewind_appl_ptr(substream, frames, | |
2658 | snd_pcm_capture_hw_avail(runtime)); | |
1da177e4 LT |
2659 | snd_pcm_stream_unlock_irq(substream); |
2660 | return ret; | |
2661 | } | |
2662 | ||
877211f5 TI |
2663 | static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream, |
2664 | snd_pcm_uframes_t frames) | |
1da177e4 | 2665 | { |
877211f5 | 2666 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 2667 | snd_pcm_sframes_t ret; |
1da177e4 LT |
2668 | |
2669 | if (frames == 0) | |
2670 | return 0; | |
2671 | ||
2672 | snd_pcm_stream_lock_irq(substream); | |
f839cc1c | 2673 | ret = do_pcm_hwsync(substream); |
e0327a0f TI |
2674 | if (!ret) |
2675 | ret = forward_appl_ptr(substream, frames, | |
2676 | snd_pcm_playback_avail(runtime)); | |
1da177e4 LT |
2677 | snd_pcm_stream_unlock_irq(substream); |
2678 | return ret; | |
2679 | } | |
2680 | ||
877211f5 TI |
2681 | static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream, |
2682 | snd_pcm_uframes_t frames) | |
1da177e4 | 2683 | { |
877211f5 | 2684 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 2685 | snd_pcm_sframes_t ret; |
1da177e4 LT |
2686 | |
2687 | if (frames == 0) | |
2688 | return 0; | |
2689 | ||
2690 | snd_pcm_stream_lock_irq(substream); | |
f839cc1c | 2691 | ret = do_pcm_hwsync(substream); |
e0327a0f TI |
2692 | if (!ret) |
2693 | ret = forward_appl_ptr(substream, frames, | |
2694 | snd_pcm_capture_avail(runtime)); | |
1da177e4 LT |
2695 | snd_pcm_stream_unlock_irq(substream); |
2696 | return ret; | |
2697 | } | |
2698 | ||
877211f5 | 2699 | static int snd_pcm_hwsync(struct snd_pcm_substream *substream) |
1da177e4 | 2700 | { |
1da177e4 LT |
2701 | int err; |
2702 | ||
2703 | snd_pcm_stream_lock_irq(substream); | |
f839cc1c | 2704 | err = do_pcm_hwsync(substream); |
1da177e4 LT |
2705 | snd_pcm_stream_unlock_irq(substream); |
2706 | return err; | |
2707 | } | |
2708 | ||
00e0495d JM |
2709 | static int snd_pcm_delay(struct snd_pcm_substream *substream, |
2710 | snd_pcm_sframes_t *delay) | |
1da177e4 | 2711 | { |
877211f5 | 2712 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2713 | int err; |
2714 | snd_pcm_sframes_t n = 0; | |
2715 | ||
2716 | snd_pcm_stream_lock_irq(substream); | |
f839cc1c TI |
2717 | err = do_pcm_hwsync(substream); |
2718 | if (!err) { | |
1da177e4 LT |
2719 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
2720 | n = snd_pcm_playback_hw_avail(runtime); | |
2721 | else | |
2722 | n = snd_pcm_capture_avail(runtime); | |
4bbe1ddf | 2723 | n += runtime->delay; |
1da177e4 LT |
2724 | } |
2725 | snd_pcm_stream_unlock_irq(substream); | |
00e0495d JM |
2726 | if (!err) |
2727 | *delay = n; | |
2728 | return err; | |
1da177e4 LT |
2729 | } |
2730 | ||
877211f5 TI |
2731 | static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream, |
2732 | struct snd_pcm_sync_ptr __user *_sync_ptr) | |
1da177e4 | 2733 | { |
877211f5 TI |
2734 | struct snd_pcm_runtime *runtime = substream->runtime; |
2735 | struct snd_pcm_sync_ptr sync_ptr; | |
2736 | volatile struct snd_pcm_mmap_status *status; | |
2737 | volatile struct snd_pcm_mmap_control *control; | |
1da177e4 LT |
2738 | int err; |
2739 | ||
2740 | memset(&sync_ptr, 0, sizeof(sync_ptr)); | |
2741 | if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags))) | |
2742 | return -EFAULT; | |
877211f5 | 2743 | if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control))) |
1da177e4 LT |
2744 | return -EFAULT; |
2745 | status = runtime->status; | |
2746 | control = runtime->control; | |
2747 | if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) { | |
2748 | err = snd_pcm_hwsync(substream); | |
2749 | if (err < 0) | |
2750 | return err; | |
2751 | } | |
2752 | snd_pcm_stream_lock_irq(substream); | |
9027c463 | 2753 | if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) { |
66e01a5c TS |
2754 | err = pcm_lib_apply_appl_ptr(substream, |
2755 | sync_ptr.c.control.appl_ptr); | |
9027c463 TI |
2756 | if (err < 0) { |
2757 | snd_pcm_stream_unlock_irq(substream); | |
2758 | return err; | |
2759 | } | |
2760 | } else { | |
1da177e4 | 2761 | sync_ptr.c.control.appl_ptr = control->appl_ptr; |
9027c463 | 2762 | } |
1da177e4 LT |
2763 | if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) |
2764 | control->avail_min = sync_ptr.c.control.avail_min; | |
2765 | else | |
2766 | sync_ptr.c.control.avail_min = control->avail_min; | |
2767 | sync_ptr.s.status.state = status->state; | |
2768 | sync_ptr.s.status.hw_ptr = status->hw_ptr; | |
2769 | sync_ptr.s.status.tstamp = status->tstamp; | |
2770 | sync_ptr.s.status.suspended_state = status->suspended_state; | |
30ddc329 | 2771 | sync_ptr.s.status.audio_tstamp = status->audio_tstamp; |
1da177e4 LT |
2772 | snd_pcm_stream_unlock_irq(substream); |
2773 | if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr))) | |
2774 | return -EFAULT; | |
2775 | return 0; | |
2776 | } | |
b751eef1 JK |
2777 | |
2778 | static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg) | |
2779 | { | |
2780 | struct snd_pcm_runtime *runtime = substream->runtime; | |
2781 | int arg; | |
2782 | ||
2783 | if (get_user(arg, _arg)) | |
2784 | return -EFAULT; | |
2785 | if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST) | |
2786 | return -EINVAL; | |
2408c219 | 2787 | runtime->tstamp_type = arg; |
b751eef1 JK |
2788 | return 0; |
2789 | } | |
67616fed TI |
2790 | |
2791 | static int snd_pcm_xferi_frames_ioctl(struct snd_pcm_substream *substream, | |
2792 | struct snd_xferi __user *_xferi) | |
2793 | { | |
2794 | struct snd_xferi xferi; | |
2795 | struct snd_pcm_runtime *runtime = substream->runtime; | |
2796 | snd_pcm_sframes_t result; | |
2797 | ||
2798 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2799 | return -EBADFD; | |
2800 | if (put_user(0, &_xferi->result)) | |
2801 | return -EFAULT; | |
2802 | if (copy_from_user(&xferi, _xferi, sizeof(xferi))) | |
2803 | return -EFAULT; | |
2804 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
2805 | result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames); | |
2806 | else | |
2807 | result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames); | |
2808 | __put_user(result, &_xferi->result); | |
2809 | return result < 0 ? result : 0; | |
2810 | } | |
2811 | ||
2812 | static int snd_pcm_xfern_frames_ioctl(struct snd_pcm_substream *substream, | |
2813 | struct snd_xfern __user *_xfern) | |
2814 | { | |
2815 | struct snd_xfern xfern; | |
2816 | struct snd_pcm_runtime *runtime = substream->runtime; | |
2817 | void *bufs; | |
2818 | snd_pcm_sframes_t result; | |
2819 | ||
2820 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2821 | return -EBADFD; | |
2822 | if (runtime->channels > 128) | |
2823 | return -EINVAL; | |
2824 | if (put_user(0, &_xfern->result)) | |
2825 | return -EFAULT; | |
2826 | if (copy_from_user(&xfern, _xfern, sizeof(xfern))) | |
2827 | return -EFAULT; | |
2828 | ||
2829 | bufs = memdup_user(xfern.bufs, sizeof(void *) * runtime->channels); | |
2830 | if (IS_ERR(bufs)) | |
2831 | return PTR_ERR(bufs); | |
2832 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
2833 | result = snd_pcm_lib_writev(substream, bufs, xfern.frames); | |
2834 | else | |
2835 | result = snd_pcm_lib_readv(substream, bufs, xfern.frames); | |
2836 | kfree(bufs); | |
2837 | __put_user(result, &_xfern->result); | |
2838 | return result < 0 ? result : 0; | |
2839 | } | |
2840 | ||
2841 | static int snd_pcm_rewind_ioctl(struct snd_pcm_substream *substream, | |
2842 | snd_pcm_uframes_t __user *_frames) | |
2843 | { | |
2844 | snd_pcm_uframes_t frames; | |
2845 | snd_pcm_sframes_t result; | |
2846 | ||
2847 | if (get_user(frames, _frames)) | |
2848 | return -EFAULT; | |
2849 | if (put_user(0, _frames)) | |
2850 | return -EFAULT; | |
2851 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
2852 | result = snd_pcm_playback_rewind(substream, frames); | |
2853 | else | |
2854 | result = snd_pcm_capture_rewind(substream, frames); | |
2855 | __put_user(result, _frames); | |
2856 | return result < 0 ? result : 0; | |
2857 | } | |
2858 | ||
2859 | static int snd_pcm_forward_ioctl(struct snd_pcm_substream *substream, | |
2860 | snd_pcm_uframes_t __user *_frames) | |
2861 | { | |
2862 | snd_pcm_uframes_t frames; | |
2863 | snd_pcm_sframes_t result; | |
2864 | ||
2865 | if (get_user(frames, _frames)) | |
2866 | return -EFAULT; | |
2867 | if (put_user(0, _frames)) | |
2868 | return -EFAULT; | |
2869 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
2870 | result = snd_pcm_playback_forward(substream, frames); | |
2871 | else | |
2872 | result = snd_pcm_capture_forward(substream, frames); | |
2873 | __put_user(result, _frames); | |
2874 | return result < 0 ? result : 0; | |
2875 | } | |
2876 | ||
2877 | static int snd_pcm_common_ioctl(struct file *file, | |
0df63e44 | 2878 | struct snd_pcm_substream *substream, |
1da177e4 LT |
2879 | unsigned int cmd, void __user *arg) |
2880 | { | |
4b671f57 | 2881 | struct snd_pcm_file *pcm_file = file->private_data; |
7d8e8292 TI |
2882 | int res; |
2883 | ||
67616fed TI |
2884 | if (PCM_RUNTIME_CHECK(substream)) |
2885 | return -ENXIO; | |
2886 | ||
7d8e8292 TI |
2887 | res = snd_power_wait(substream->pcm->card, SNDRV_CTL_POWER_D0); |
2888 | if (res < 0) | |
2889 | return res; | |
4b671f57 | 2890 | |
1da177e4 LT |
2891 | switch (cmd) { |
2892 | case SNDRV_PCM_IOCTL_PVERSION: | |
2893 | return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0; | |
2894 | case SNDRV_PCM_IOCTL_INFO: | |
2895 | return snd_pcm_info_user(substream, arg); | |
28e9e473 JK |
2896 | case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */ |
2897 | return 0; | |
b751eef1 JK |
2898 | case SNDRV_PCM_IOCTL_TTSTAMP: |
2899 | return snd_pcm_tstamp(substream, arg); | |
4b671f57 TI |
2900 | case SNDRV_PCM_IOCTL_USER_PVERSION: |
2901 | if (get_user(pcm_file->user_pversion, | |
2902 | (unsigned int __user *)arg)) | |
2903 | return -EFAULT; | |
2904 | return 0; | |
1da177e4 LT |
2905 | case SNDRV_PCM_IOCTL_HW_REFINE: |
2906 | return snd_pcm_hw_refine_user(substream, arg); | |
2907 | case SNDRV_PCM_IOCTL_HW_PARAMS: | |
2908 | return snd_pcm_hw_params_user(substream, arg); | |
2909 | case SNDRV_PCM_IOCTL_HW_FREE: | |
2910 | return snd_pcm_hw_free(substream); | |
2911 | case SNDRV_PCM_IOCTL_SW_PARAMS: | |
2912 | return snd_pcm_sw_params_user(substream, arg); | |
2913 | case SNDRV_PCM_IOCTL_STATUS: | |
38ca2a4d PLB |
2914 | return snd_pcm_status_user(substream, arg, false); |
2915 | case SNDRV_PCM_IOCTL_STATUS_EXT: | |
2916 | return snd_pcm_status_user(substream, arg, true); | |
1da177e4 LT |
2917 | case SNDRV_PCM_IOCTL_CHANNEL_INFO: |
2918 | return snd_pcm_channel_info_user(substream, arg); | |
2919 | case SNDRV_PCM_IOCTL_PREPARE: | |
0df63e44 | 2920 | return snd_pcm_prepare(substream, file); |
1da177e4 LT |
2921 | case SNDRV_PCM_IOCTL_RESET: |
2922 | return snd_pcm_reset(substream); | |
2923 | case SNDRV_PCM_IOCTL_START: | |
c2c86a97 | 2924 | return snd_pcm_start_lock_irq(substream); |
1da177e4 LT |
2925 | case SNDRV_PCM_IOCTL_LINK: |
2926 | return snd_pcm_link(substream, (int)(unsigned long) arg); | |
2927 | case SNDRV_PCM_IOCTL_UNLINK: | |
2928 | return snd_pcm_unlink(substream); | |
2929 | case SNDRV_PCM_IOCTL_RESUME: | |
2930 | return snd_pcm_resume(substream); | |
2931 | case SNDRV_PCM_IOCTL_XRUN: | |
2932 | return snd_pcm_xrun(substream); | |
2933 | case SNDRV_PCM_IOCTL_HWSYNC: | |
2934 | return snd_pcm_hwsync(substream); | |
2935 | case SNDRV_PCM_IOCTL_DELAY: | |
c2c86a97 | 2936 | { |
00e0495d | 2937 | snd_pcm_sframes_t delay; |
c2c86a97 | 2938 | snd_pcm_sframes_t __user *res = arg; |
00e0495d | 2939 | int err; |
c2c86a97 | 2940 | |
00e0495d JM |
2941 | err = snd_pcm_delay(substream, &delay); |
2942 | if (err) | |
2943 | return err; | |
c2c86a97 TI |
2944 | if (put_user(delay, res)) |
2945 | return -EFAULT; | |
2946 | return 0; | |
2947 | } | |
1da177e4 LT |
2948 | case SNDRV_PCM_IOCTL_SYNC_PTR: |
2949 | return snd_pcm_sync_ptr(substream, arg); | |
59d48582 | 2950 | #ifdef CONFIG_SND_SUPPORT_OLD_API |
1da177e4 LT |
2951 | case SNDRV_PCM_IOCTL_HW_REFINE_OLD: |
2952 | return snd_pcm_hw_refine_old_user(substream, arg); | |
2953 | case SNDRV_PCM_IOCTL_HW_PARAMS_OLD: | |
2954 | return snd_pcm_hw_params_old_user(substream, arg); | |
59d48582 | 2955 | #endif |
1da177e4 | 2956 | case SNDRV_PCM_IOCTL_DRAIN: |
4cdc115f | 2957 | return snd_pcm_drain(substream, file); |
1da177e4 LT |
2958 | case SNDRV_PCM_IOCTL_DROP: |
2959 | return snd_pcm_drop(substream); | |
e661d0dd | 2960 | case SNDRV_PCM_IOCTL_PAUSE: |
34bcc44a TI |
2961 | return snd_pcm_action_lock_irq(&snd_pcm_action_pause, |
2962 | substream, | |
2963 | (int)(unsigned long)arg); | |
1da177e4 | 2964 | case SNDRV_PCM_IOCTL_WRITEI_FRAMES: |
1da177e4 | 2965 | case SNDRV_PCM_IOCTL_READI_FRAMES: |
67616fed TI |
2966 | return snd_pcm_xferi_frames_ioctl(substream, arg); |
2967 | case SNDRV_PCM_IOCTL_WRITEN_FRAMES: | |
1da177e4 | 2968 | case SNDRV_PCM_IOCTL_READN_FRAMES: |
67616fed | 2969 | return snd_pcm_xfern_frames_ioctl(substream, arg); |
1da177e4 | 2970 | case SNDRV_PCM_IOCTL_REWIND: |
67616fed | 2971 | return snd_pcm_rewind_ioctl(substream, arg); |
1da177e4 | 2972 | case SNDRV_PCM_IOCTL_FORWARD: |
67616fed | 2973 | return snd_pcm_forward_ioctl(substream, arg); |
1da177e4 | 2974 | } |
67616fed TI |
2975 | pcm_dbg(substream->pcm, "unknown ioctl = 0x%x\n", cmd); |
2976 | return -ENOTTY; | |
1da177e4 LT |
2977 | } |
2978 | ||
67616fed TI |
2979 | static long snd_pcm_ioctl(struct file *file, unsigned int cmd, |
2980 | unsigned long arg) | |
1da177e4 | 2981 | { |
877211f5 | 2982 | struct snd_pcm_file *pcm_file; |
1da177e4 LT |
2983 | |
2984 | pcm_file = file->private_data; | |
2985 | ||
2986 | if (((cmd >> 8) & 0xff) != 'A') | |
2987 | return -ENOTTY; | |
2988 | ||
67616fed TI |
2989 | return snd_pcm_common_ioctl(file, pcm_file->substream, cmd, |
2990 | (void __user *)arg); | |
1da177e4 LT |
2991 | } |
2992 | ||
c2c86a97 TI |
2993 | /** |
2994 | * snd_pcm_kernel_ioctl - Execute PCM ioctl in the kernel-space | |
2995 | * @substream: PCM substream | |
2996 | * @cmd: IOCTL cmd | |
2997 | * @arg: IOCTL argument | |
2998 | * | |
2999 | * The function is provided primarily for OSS layer and USB gadget drivers, | |
3000 | * and it allows only the limited set of ioctls (hw_params, sw_params, | |
3001 | * prepare, start, drain, drop, forward). | |
3002 | */ | |
bf1bbb5a TI |
3003 | int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, |
3004 | unsigned int cmd, void *arg) | |
1da177e4 | 3005 | { |
c2c86a97 TI |
3006 | snd_pcm_uframes_t *frames = arg; |
3007 | snd_pcm_sframes_t result; | |
1da177e4 | 3008 | |
c2c86a97 TI |
3009 | switch (cmd) { |
3010 | case SNDRV_PCM_IOCTL_FORWARD: | |
3011 | { | |
3012 | /* provided only for OSS; capture-only and no value returned */ | |
3013 | if (substream->stream != SNDRV_PCM_STREAM_CAPTURE) | |
3014 | return -EINVAL; | |
3015 | result = snd_pcm_capture_forward(substream, *frames); | |
3016 | return result < 0 ? result : 0; | |
3017 | } | |
3018 | case SNDRV_PCM_IOCTL_HW_PARAMS: | |
3019 | return snd_pcm_hw_params(substream, arg); | |
3020 | case SNDRV_PCM_IOCTL_SW_PARAMS: | |
3021 | return snd_pcm_sw_params(substream, arg); | |
3022 | case SNDRV_PCM_IOCTL_PREPARE: | |
3023 | return snd_pcm_prepare(substream, NULL); | |
3024 | case SNDRV_PCM_IOCTL_START: | |
3025 | return snd_pcm_start_lock_irq(substream); | |
3026 | case SNDRV_PCM_IOCTL_DRAIN: | |
7d8e8292 | 3027 | return snd_pcm_drain(substream, NULL); |
c2c86a97 TI |
3028 | case SNDRV_PCM_IOCTL_DROP: |
3029 | return snd_pcm_drop(substream); | |
3030 | case SNDRV_PCM_IOCTL_DELAY: | |
00e0495d | 3031 | return snd_pcm_delay(substream, frames); |
1da177e4 | 3032 | default: |
c2c86a97 | 3033 | return -EINVAL; |
1da177e4 LT |
3034 | } |
3035 | } | |
e88e8ae6 TI |
3036 | EXPORT_SYMBOL(snd_pcm_kernel_ioctl); |
3037 | ||
877211f5 TI |
3038 | static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count, |
3039 | loff_t * offset) | |
1da177e4 | 3040 | { |
877211f5 TI |
3041 | struct snd_pcm_file *pcm_file; |
3042 | struct snd_pcm_substream *substream; | |
3043 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3044 | snd_pcm_sframes_t result; |
3045 | ||
3046 | pcm_file = file->private_data; | |
3047 | substream = pcm_file->substream; | |
7eaa943c TI |
3048 | if (PCM_RUNTIME_CHECK(substream)) |
3049 | return -ENXIO; | |
1da177e4 LT |
3050 | runtime = substream->runtime; |
3051 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
3052 | return -EBADFD; | |
3053 | if (!frame_aligned(runtime, count)) | |
3054 | return -EINVAL; | |
3055 | count = bytes_to_frames(runtime, count); | |
3056 | result = snd_pcm_lib_read(substream, buf, count); | |
3057 | if (result > 0) | |
3058 | result = frames_to_bytes(runtime, result); | |
3059 | return result; | |
3060 | } | |
3061 | ||
877211f5 TI |
3062 | static ssize_t snd_pcm_write(struct file *file, const char __user *buf, |
3063 | size_t count, loff_t * offset) | |
1da177e4 | 3064 | { |
877211f5 TI |
3065 | struct snd_pcm_file *pcm_file; |
3066 | struct snd_pcm_substream *substream; | |
3067 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3068 | snd_pcm_sframes_t result; |
3069 | ||
3070 | pcm_file = file->private_data; | |
3071 | substream = pcm_file->substream; | |
7eaa943c TI |
3072 | if (PCM_RUNTIME_CHECK(substream)) |
3073 | return -ENXIO; | |
1da177e4 | 3074 | runtime = substream->runtime; |
7eaa943c TI |
3075 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
3076 | return -EBADFD; | |
3077 | if (!frame_aligned(runtime, count)) | |
3078 | return -EINVAL; | |
1da177e4 LT |
3079 | count = bytes_to_frames(runtime, count); |
3080 | result = snd_pcm_lib_write(substream, buf, count); | |
3081 | if (result > 0) | |
3082 | result = frames_to_bytes(runtime, result); | |
1da177e4 LT |
3083 | return result; |
3084 | } | |
3085 | ||
1c65d986 | 3086 | static ssize_t snd_pcm_readv(struct kiocb *iocb, struct iov_iter *to) |
1da177e4 | 3087 | { |
877211f5 TI |
3088 | struct snd_pcm_file *pcm_file; |
3089 | struct snd_pcm_substream *substream; | |
3090 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3091 | snd_pcm_sframes_t result; |
3092 | unsigned long i; | |
3093 | void __user **bufs; | |
3094 | snd_pcm_uframes_t frames; | |
3095 | ||
ee0b3e67 | 3096 | pcm_file = iocb->ki_filp->private_data; |
1da177e4 | 3097 | substream = pcm_file->substream; |
7eaa943c TI |
3098 | if (PCM_RUNTIME_CHECK(substream)) |
3099 | return -ENXIO; | |
1da177e4 LT |
3100 | runtime = substream->runtime; |
3101 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
3102 | return -EBADFD; | |
1c65d986 AV |
3103 | if (!iter_is_iovec(to)) |
3104 | return -EINVAL; | |
3105 | if (to->nr_segs > 1024 || to->nr_segs != runtime->channels) | |
1da177e4 | 3106 | return -EINVAL; |
1c65d986 | 3107 | if (!frame_aligned(runtime, to->iov->iov_len)) |
1da177e4 | 3108 | return -EINVAL; |
1c65d986 AV |
3109 | frames = bytes_to_samples(runtime, to->iov->iov_len); |
3110 | bufs = kmalloc(sizeof(void *) * to->nr_segs, GFP_KERNEL); | |
1da177e4 LT |
3111 | if (bufs == NULL) |
3112 | return -ENOMEM; | |
1c65d986 AV |
3113 | for (i = 0; i < to->nr_segs; ++i) |
3114 | bufs[i] = to->iov[i].iov_base; | |
1da177e4 LT |
3115 | result = snd_pcm_lib_readv(substream, bufs, frames); |
3116 | if (result > 0) | |
3117 | result = frames_to_bytes(runtime, result); | |
3118 | kfree(bufs); | |
3119 | return result; | |
3120 | } | |
3121 | ||
1c65d986 | 3122 | static ssize_t snd_pcm_writev(struct kiocb *iocb, struct iov_iter *from) |
1da177e4 | 3123 | { |
877211f5 TI |
3124 | struct snd_pcm_file *pcm_file; |
3125 | struct snd_pcm_substream *substream; | |
3126 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3127 | snd_pcm_sframes_t result; |
3128 | unsigned long i; | |
3129 | void __user **bufs; | |
3130 | snd_pcm_uframes_t frames; | |
3131 | ||
ee0b3e67 | 3132 | pcm_file = iocb->ki_filp->private_data; |
1da177e4 | 3133 | substream = pcm_file->substream; |
7eaa943c TI |
3134 | if (PCM_RUNTIME_CHECK(substream)) |
3135 | return -ENXIO; | |
1da177e4 | 3136 | runtime = substream->runtime; |
7eaa943c TI |
3137 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
3138 | return -EBADFD; | |
1c65d986 AV |
3139 | if (!iter_is_iovec(from)) |
3140 | return -EINVAL; | |
3141 | if (from->nr_segs > 128 || from->nr_segs != runtime->channels || | |
3142 | !frame_aligned(runtime, from->iov->iov_len)) | |
7eaa943c | 3143 | return -EINVAL; |
1c65d986 AV |
3144 | frames = bytes_to_samples(runtime, from->iov->iov_len); |
3145 | bufs = kmalloc(sizeof(void *) * from->nr_segs, GFP_KERNEL); | |
1da177e4 LT |
3146 | if (bufs == NULL) |
3147 | return -ENOMEM; | |
1c65d986 AV |
3148 | for (i = 0; i < from->nr_segs; ++i) |
3149 | bufs[i] = from->iov[i].iov_base; | |
1da177e4 LT |
3150 | result = snd_pcm_lib_writev(substream, bufs, frames); |
3151 | if (result > 0) | |
3152 | result = frames_to_bytes(runtime, result); | |
3153 | kfree(bufs); | |
1da177e4 LT |
3154 | return result; |
3155 | } | |
3156 | ||
3157 | static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait) | |
3158 | { | |
877211f5 TI |
3159 | struct snd_pcm_file *pcm_file; |
3160 | struct snd_pcm_substream *substream; | |
3161 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3162 | unsigned int mask; |
3163 | snd_pcm_uframes_t avail; | |
3164 | ||
3165 | pcm_file = file->private_data; | |
3166 | ||
3167 | substream = pcm_file->substream; | |
7eaa943c | 3168 | if (PCM_RUNTIME_CHECK(substream)) |
e099aeea | 3169 | return POLLOUT | POLLWRNORM | POLLERR; |
1da177e4 LT |
3170 | runtime = substream->runtime; |
3171 | ||
3172 | poll_wait(file, &runtime->sleep, wait); | |
3173 | ||
3174 | snd_pcm_stream_lock_irq(substream); | |
3175 | avail = snd_pcm_playback_avail(runtime); | |
3176 | switch (runtime->status->state) { | |
3177 | case SNDRV_PCM_STATE_RUNNING: | |
3178 | case SNDRV_PCM_STATE_PREPARED: | |
3179 | case SNDRV_PCM_STATE_PAUSED: | |
3180 | if (avail >= runtime->control->avail_min) { | |
3181 | mask = POLLOUT | POLLWRNORM; | |
3182 | break; | |
3183 | } | |
3184 | /* Fall through */ | |
3185 | case SNDRV_PCM_STATE_DRAINING: | |
3186 | mask = 0; | |
3187 | break; | |
3188 | default: | |
3189 | mask = POLLOUT | POLLWRNORM | POLLERR; | |
3190 | break; | |
3191 | } | |
3192 | snd_pcm_stream_unlock_irq(substream); | |
3193 | return mask; | |
3194 | } | |
3195 | ||
3196 | static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait) | |
3197 | { | |
877211f5 TI |
3198 | struct snd_pcm_file *pcm_file; |
3199 | struct snd_pcm_substream *substream; | |
3200 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3201 | unsigned int mask; |
3202 | snd_pcm_uframes_t avail; | |
3203 | ||
3204 | pcm_file = file->private_data; | |
3205 | ||
3206 | substream = pcm_file->substream; | |
7eaa943c | 3207 | if (PCM_RUNTIME_CHECK(substream)) |
e099aeea | 3208 | return POLLIN | POLLRDNORM | POLLERR; |
1da177e4 LT |
3209 | runtime = substream->runtime; |
3210 | ||
3211 | poll_wait(file, &runtime->sleep, wait); | |
3212 | ||
3213 | snd_pcm_stream_lock_irq(substream); | |
3214 | avail = snd_pcm_capture_avail(runtime); | |
3215 | switch (runtime->status->state) { | |
3216 | case SNDRV_PCM_STATE_RUNNING: | |
3217 | case SNDRV_PCM_STATE_PREPARED: | |
3218 | case SNDRV_PCM_STATE_PAUSED: | |
3219 | if (avail >= runtime->control->avail_min) { | |
3220 | mask = POLLIN | POLLRDNORM; | |
3221 | break; | |
3222 | } | |
3223 | mask = 0; | |
3224 | break; | |
3225 | case SNDRV_PCM_STATE_DRAINING: | |
3226 | if (avail > 0) { | |
3227 | mask = POLLIN | POLLRDNORM; | |
3228 | break; | |
3229 | } | |
3230 | /* Fall through */ | |
3231 | default: | |
3232 | mask = POLLIN | POLLRDNORM | POLLERR; | |
3233 | break; | |
3234 | } | |
3235 | snd_pcm_stream_unlock_irq(substream); | |
3236 | return mask; | |
3237 | } | |
3238 | ||
3239 | /* | |
3240 | * mmap support | |
3241 | */ | |
3242 | ||
3243 | /* | |
3244 | * Only on coherent architectures, we can mmap the status and the control records | |
3245 | * for effcient data transfer. On others, we have to use HWSYNC ioctl... | |
3246 | */ | |
3247 | #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) | |
3248 | /* | |
3249 | * mmap status record | |
3250 | */ | |
11bac800 | 3251 | static int snd_pcm_mmap_status_fault(struct vm_fault *vmf) |
1da177e4 | 3252 | { |
11bac800 | 3253 | struct snd_pcm_substream *substream = vmf->vma->vm_private_data; |
877211f5 | 3254 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
3255 | |
3256 | if (substream == NULL) | |
3ad5afcd | 3257 | return VM_FAULT_SIGBUS; |
1da177e4 | 3258 | runtime = substream->runtime; |
3ad5afcd NP |
3259 | vmf->page = virt_to_page(runtime->status); |
3260 | get_page(vmf->page); | |
3261 | return 0; | |
1da177e4 LT |
3262 | } |
3263 | ||
f0f37e2f | 3264 | static const struct vm_operations_struct snd_pcm_vm_ops_status = |
1da177e4 | 3265 | { |
3ad5afcd | 3266 | .fault = snd_pcm_mmap_status_fault, |
1da177e4 LT |
3267 | }; |
3268 | ||
877211f5 | 3269 | static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, |
1da177e4 LT |
3270 | struct vm_area_struct *area) |
3271 | { | |
1da177e4 LT |
3272 | long size; |
3273 | if (!(area->vm_flags & VM_READ)) | |
3274 | return -EINVAL; | |
1da177e4 | 3275 | size = area->vm_end - area->vm_start; |
877211f5 | 3276 | if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))) |
1da177e4 LT |
3277 | return -EINVAL; |
3278 | area->vm_ops = &snd_pcm_vm_ops_status; | |
3279 | area->vm_private_data = substream; | |
314e51b9 | 3280 | area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; |
1da177e4 LT |
3281 | return 0; |
3282 | } | |
3283 | ||
3284 | /* | |
3285 | * mmap control record | |
3286 | */ | |
11bac800 | 3287 | static int snd_pcm_mmap_control_fault(struct vm_fault *vmf) |
1da177e4 | 3288 | { |
11bac800 | 3289 | struct snd_pcm_substream *substream = vmf->vma->vm_private_data; |
877211f5 | 3290 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
3291 | |
3292 | if (substream == NULL) | |
3ad5afcd | 3293 | return VM_FAULT_SIGBUS; |
1da177e4 | 3294 | runtime = substream->runtime; |
3ad5afcd NP |
3295 | vmf->page = virt_to_page(runtime->control); |
3296 | get_page(vmf->page); | |
3297 | return 0; | |
1da177e4 LT |
3298 | } |
3299 | ||
f0f37e2f | 3300 | static const struct vm_operations_struct snd_pcm_vm_ops_control = |
1da177e4 | 3301 | { |
3ad5afcd | 3302 | .fault = snd_pcm_mmap_control_fault, |
1da177e4 LT |
3303 | }; |
3304 | ||
877211f5 | 3305 | static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, |
1da177e4 LT |
3306 | struct vm_area_struct *area) |
3307 | { | |
1da177e4 LT |
3308 | long size; |
3309 | if (!(area->vm_flags & VM_READ)) | |
3310 | return -EINVAL; | |
1da177e4 | 3311 | size = area->vm_end - area->vm_start; |
877211f5 | 3312 | if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control))) |
1da177e4 LT |
3313 | return -EINVAL; |
3314 | area->vm_ops = &snd_pcm_vm_ops_control; | |
3315 | area->vm_private_data = substream; | |
314e51b9 | 3316 | area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; |
1da177e4 LT |
3317 | return 0; |
3318 | } | |
42f94597 TI |
3319 | |
3320 | static bool pcm_status_mmap_allowed(struct snd_pcm_file *pcm_file) | |
3321 | { | |
3322 | if (pcm_file->no_compat_mmap) | |
3323 | return false; | |
b602aa8e TI |
3324 | /* See pcm_control_mmap_allowed() below. |
3325 | * Since older alsa-lib requires both status and control mmaps to be | |
3326 | * coupled, we have to disable the status mmap for old alsa-lib, too. | |
3327 | */ | |
3328 | if (pcm_file->user_pversion < SNDRV_PROTOCOL_VERSION(2, 0, 14) && | |
3329 | (pcm_file->substream->runtime->hw.info & SNDRV_PCM_INFO_SYNC_APPLPTR)) | |
3330 | return false; | |
3331 | return true; | |
3332 | } | |
3333 | ||
3334 | static bool pcm_control_mmap_allowed(struct snd_pcm_file *pcm_file) | |
3335 | { | |
3336 | if (pcm_file->no_compat_mmap) | |
3337 | return false; | |
3338 | /* Disallow the control mmap when SYNC_APPLPTR flag is set; | |
42f94597 TI |
3339 | * it enforces the user-space to fall back to snd_pcm_sync_ptr(), |
3340 | * thus it effectively assures the manual update of appl_ptr. | |
42f94597 TI |
3341 | */ |
3342 | if (pcm_file->substream->runtime->hw.info & SNDRV_PCM_INFO_SYNC_APPLPTR) | |
3343 | return false; | |
3344 | return true; | |
3345 | } | |
3346 | ||
1da177e4 LT |
3347 | #else /* ! coherent mmap */ |
3348 | /* | |
3349 | * don't support mmap for status and control records. | |
3350 | */ | |
42f94597 | 3351 | #define pcm_status_mmap_allowed(pcm_file) false |
b602aa8e | 3352 | #define pcm_control_mmap_allowed(pcm_file) false |
42f94597 | 3353 | |
877211f5 | 3354 | static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, |
1da177e4 LT |
3355 | struct vm_area_struct *area) |
3356 | { | |
3357 | return -ENXIO; | |
3358 | } | |
877211f5 | 3359 | static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, |
1da177e4 LT |
3360 | struct vm_area_struct *area) |
3361 | { | |
3362 | return -ENXIO; | |
3363 | } | |
3364 | #endif /* coherent mmap */ | |
3365 | ||
9eb4a067 TI |
3366 | static inline struct page * |
3367 | snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs) | |
3368 | { | |
3369 | void *vaddr = substream->runtime->dma_area + ofs; | |
3370 | return virt_to_page(vaddr); | |
3371 | } | |
3372 | ||
1da177e4 | 3373 | /* |
3ad5afcd | 3374 | * fault callback for mmapping a RAM page |
1da177e4 | 3375 | */ |
11bac800 | 3376 | static int snd_pcm_mmap_data_fault(struct vm_fault *vmf) |
1da177e4 | 3377 | { |
11bac800 | 3378 | struct snd_pcm_substream *substream = vmf->vma->vm_private_data; |
877211f5 | 3379 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
3380 | unsigned long offset; |
3381 | struct page * page; | |
1da177e4 LT |
3382 | size_t dma_bytes; |
3383 | ||
3384 | if (substream == NULL) | |
3ad5afcd | 3385 | return VM_FAULT_SIGBUS; |
1da177e4 | 3386 | runtime = substream->runtime; |
3ad5afcd | 3387 | offset = vmf->pgoff << PAGE_SHIFT; |
1da177e4 LT |
3388 | dma_bytes = PAGE_ALIGN(runtime->dma_bytes); |
3389 | if (offset > dma_bytes - PAGE_SIZE) | |
3ad5afcd | 3390 | return VM_FAULT_SIGBUS; |
9eb4a067 | 3391 | if (substream->ops->page) |
1da177e4 | 3392 | page = substream->ops->page(substream, offset); |
9eb4a067 TI |
3393 | else |
3394 | page = snd_pcm_default_page_ops(substream, offset); | |
3395 | if (!page) | |
3396 | return VM_FAULT_SIGBUS; | |
b5810039 | 3397 | get_page(page); |
3ad5afcd NP |
3398 | vmf->page = page; |
3399 | return 0; | |
1da177e4 LT |
3400 | } |
3401 | ||
657b1989 TI |
3402 | static const struct vm_operations_struct snd_pcm_vm_ops_data = { |
3403 | .open = snd_pcm_mmap_data_open, | |
3404 | .close = snd_pcm_mmap_data_close, | |
3405 | }; | |
3406 | ||
3407 | static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = { | |
1da177e4 LT |
3408 | .open = snd_pcm_mmap_data_open, |
3409 | .close = snd_pcm_mmap_data_close, | |
3ad5afcd | 3410 | .fault = snd_pcm_mmap_data_fault, |
1da177e4 LT |
3411 | }; |
3412 | ||
3413 | /* | |
3414 | * mmap the DMA buffer on RAM | |
3415 | */ | |
30b771cf TI |
3416 | |
3417 | /** | |
3418 | * snd_pcm_lib_default_mmap - Default PCM data mmap function | |
3419 | * @substream: PCM substream | |
3420 | * @area: VMA | |
3421 | * | |
3422 | * This is the default mmap handler for PCM data. When mmap pcm_ops is NULL, | |
3423 | * this function is invoked implicitly. | |
3424 | */ | |
18a2b962 TI |
3425 | int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream, |
3426 | struct vm_area_struct *area) | |
1da177e4 | 3427 | { |
314e51b9 | 3428 | area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; |
a5606f85 | 3429 | #ifdef CONFIG_GENERIC_ALLOCATOR |
05503214 NC |
3430 | if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_IRAM) { |
3431 | area->vm_page_prot = pgprot_writecombine(area->vm_page_prot); | |
3432 | return remap_pfn_range(area, area->vm_start, | |
3433 | substream->dma_buffer.addr >> PAGE_SHIFT, | |
3434 | area->vm_end - area->vm_start, area->vm_page_prot); | |
3435 | } | |
a5606f85 | 3436 | #endif /* CONFIG_GENERIC_ALLOCATOR */ |
49d776ff | 3437 | #ifndef CONFIG_X86 /* for avoiding warnings arch/x86/mm/pat.c */ |
abe594c2 | 3438 | if (IS_ENABLED(CONFIG_HAS_DMA) && !substream->ops->page && |
657b1989 TI |
3439 | substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) |
3440 | return dma_mmap_coherent(substream->dma_buffer.dev.dev, | |
3441 | area, | |
3442 | substream->runtime->dma_area, | |
3443 | substream->runtime->dma_addr, | |
17c9ea37 | 3444 | substream->runtime->dma_bytes); |
49d776ff | 3445 | #endif /* CONFIG_X86 */ |
657b1989 TI |
3446 | /* mmap with fault handler */ |
3447 | area->vm_ops = &snd_pcm_vm_ops_data_fault; | |
1da177e4 LT |
3448 | return 0; |
3449 | } | |
18a2b962 | 3450 | EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap); |
1da177e4 LT |
3451 | |
3452 | /* | |
3453 | * mmap the DMA buffer on I/O memory area | |
3454 | */ | |
3455 | #if SNDRV_PCM_INFO_MMAP_IOMEM | |
30b771cf TI |
3456 | /** |
3457 | * snd_pcm_lib_mmap_iomem - Default PCM data mmap function for I/O mem | |
3458 | * @substream: PCM substream | |
3459 | * @area: VMA | |
3460 | * | |
3461 | * When your hardware uses the iomapped pages as the hardware buffer and | |
3462 | * wants to mmap it, pass this function as mmap pcm_ops. Note that this | |
3463 | * is supposed to work only on limited architectures. | |
3464 | */ | |
877211f5 TI |
3465 | int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, |
3466 | struct vm_area_struct *area) | |
1da177e4 | 3467 | { |
0fe09a45 | 3468 | struct snd_pcm_runtime *runtime = substream->runtime;; |
1da177e4 | 3469 | |
1da177e4 | 3470 | area->vm_page_prot = pgprot_noncached(area->vm_page_prot); |
0fe09a45 | 3471 | return vm_iomap_memory(area, runtime->dma_addr, runtime->dma_bytes); |
1da177e4 | 3472 | } |
e88e8ae6 | 3473 | EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem); |
1da177e4 LT |
3474 | #endif /* SNDRV_PCM_INFO_MMAP */ |
3475 | ||
3476 | /* | |
3477 | * mmap DMA buffer | |
3478 | */ | |
877211f5 | 3479 | int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, |
1da177e4 LT |
3480 | struct vm_area_struct *area) |
3481 | { | |
877211f5 | 3482 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
3483 | long size; |
3484 | unsigned long offset; | |
3485 | size_t dma_bytes; | |
657b1989 | 3486 | int err; |
1da177e4 LT |
3487 | |
3488 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
3489 | if (!(area->vm_flags & (VM_WRITE|VM_READ))) | |
3490 | return -EINVAL; | |
3491 | } else { | |
3492 | if (!(area->vm_flags & VM_READ)) | |
3493 | return -EINVAL; | |
3494 | } | |
3495 | runtime = substream->runtime; | |
1da177e4 LT |
3496 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
3497 | return -EBADFD; | |
3498 | if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) | |
3499 | return -ENXIO; | |
3500 | if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || | |
3501 | runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) | |
3502 | return -EINVAL; | |
3503 | size = area->vm_end - area->vm_start; | |
3504 | offset = area->vm_pgoff << PAGE_SHIFT; | |
3505 | dma_bytes = PAGE_ALIGN(runtime->dma_bytes); | |
3506 | if ((size_t)size > dma_bytes) | |
3507 | return -EINVAL; | |
3508 | if (offset > dma_bytes - size) | |
3509 | return -EINVAL; | |
3510 | ||
657b1989 TI |
3511 | area->vm_ops = &snd_pcm_vm_ops_data; |
3512 | area->vm_private_data = substream; | |
1da177e4 | 3513 | if (substream->ops->mmap) |
657b1989 | 3514 | err = substream->ops->mmap(substream, area); |
1da177e4 | 3515 | else |
18a2b962 | 3516 | err = snd_pcm_lib_default_mmap(substream, area); |
657b1989 TI |
3517 | if (!err) |
3518 | atomic_inc(&substream->mmap_count); | |
3519 | return err; | |
1da177e4 | 3520 | } |
e88e8ae6 TI |
3521 | EXPORT_SYMBOL(snd_pcm_mmap_data); |
3522 | ||
1da177e4 LT |
3523 | static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area) |
3524 | { | |
877211f5 TI |
3525 | struct snd_pcm_file * pcm_file; |
3526 | struct snd_pcm_substream *substream; | |
1da177e4 LT |
3527 | unsigned long offset; |
3528 | ||
3529 | pcm_file = file->private_data; | |
3530 | substream = pcm_file->substream; | |
7eaa943c TI |
3531 | if (PCM_RUNTIME_CHECK(substream)) |
3532 | return -ENXIO; | |
1da177e4 LT |
3533 | |
3534 | offset = area->vm_pgoff << PAGE_SHIFT; | |
3535 | switch (offset) { | |
3536 | case SNDRV_PCM_MMAP_OFFSET_STATUS: | |
42f94597 | 3537 | if (!pcm_status_mmap_allowed(pcm_file)) |
1da177e4 LT |
3538 | return -ENXIO; |
3539 | return snd_pcm_mmap_status(substream, file, area); | |
3540 | case SNDRV_PCM_MMAP_OFFSET_CONTROL: | |
b602aa8e | 3541 | if (!pcm_control_mmap_allowed(pcm_file)) |
1da177e4 LT |
3542 | return -ENXIO; |
3543 | return snd_pcm_mmap_control(substream, file, area); | |
3544 | default: | |
3545 | return snd_pcm_mmap_data(substream, file, area); | |
3546 | } | |
3547 | return 0; | |
3548 | } | |
3549 | ||
3550 | static int snd_pcm_fasync(int fd, struct file * file, int on) | |
3551 | { | |
877211f5 TI |
3552 | struct snd_pcm_file * pcm_file; |
3553 | struct snd_pcm_substream *substream; | |
3554 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3555 | |
3556 | pcm_file = file->private_data; | |
3557 | substream = pcm_file->substream; | |
7eaa943c | 3558 | if (PCM_RUNTIME_CHECK(substream)) |
d05468b7 | 3559 | return -ENXIO; |
1da177e4 | 3560 | runtime = substream->runtime; |
d05468b7 | 3561 | return fasync_helper(fd, file, on, &runtime->fasync); |
1da177e4 LT |
3562 | } |
3563 | ||
3564 | /* | |
3565 | * ioctl32 compat | |
3566 | */ | |
3567 | #ifdef CONFIG_COMPAT | |
3568 | #include "pcm_compat.c" | |
3569 | #else | |
3570 | #define snd_pcm_ioctl_compat NULL | |
3571 | #endif | |
3572 | ||
3573 | /* | |
3574 | * To be removed helpers to keep binary compatibility | |
3575 | */ | |
3576 | ||
59d48582 | 3577 | #ifdef CONFIG_SND_SUPPORT_OLD_API |
1da177e4 LT |
3578 | #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5)) |
3579 | #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5)) | |
3580 | ||
877211f5 TI |
3581 | static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params, |
3582 | struct snd_pcm_hw_params_old *oparams) | |
1da177e4 LT |
3583 | { |
3584 | unsigned int i; | |
3585 | ||
3586 | memset(params, 0, sizeof(*params)); | |
3587 | params->flags = oparams->flags; | |
3588 | for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) | |
3589 | params->masks[i].bits[0] = oparams->masks[i]; | |
3590 | memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals)); | |
3591 | params->rmask = __OLD_TO_NEW_MASK(oparams->rmask); | |
3592 | params->cmask = __OLD_TO_NEW_MASK(oparams->cmask); | |
3593 | params->info = oparams->info; | |
3594 | params->msbits = oparams->msbits; | |
3595 | params->rate_num = oparams->rate_num; | |
3596 | params->rate_den = oparams->rate_den; | |
3597 | params->fifo_size = oparams->fifo_size; | |
3598 | } | |
3599 | ||
877211f5 TI |
3600 | static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams, |
3601 | struct snd_pcm_hw_params *params) | |
1da177e4 LT |
3602 | { |
3603 | unsigned int i; | |
3604 | ||
3605 | memset(oparams, 0, sizeof(*oparams)); | |
3606 | oparams->flags = params->flags; | |
3607 | for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) | |
3608 | oparams->masks[i] = params->masks[i].bits[0]; | |
3609 | memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals)); | |
3610 | oparams->rmask = __NEW_TO_OLD_MASK(params->rmask); | |
3611 | oparams->cmask = __NEW_TO_OLD_MASK(params->cmask); | |
3612 | oparams->info = params->info; | |
3613 | oparams->msbits = params->msbits; | |
3614 | oparams->rate_num = params->rate_num; | |
3615 | oparams->rate_den = params->rate_den; | |
3616 | oparams->fifo_size = params->fifo_size; | |
3617 | } | |
3618 | ||
877211f5 TI |
3619 | static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, |
3620 | struct snd_pcm_hw_params_old __user * _oparams) | |
1da177e4 | 3621 | { |
877211f5 TI |
3622 | struct snd_pcm_hw_params *params; |
3623 | struct snd_pcm_hw_params_old *oparams = NULL; | |
1da177e4 LT |
3624 | int err; |
3625 | ||
3626 | params = kmalloc(sizeof(*params), GFP_KERNEL); | |
ef44a1ec LZ |
3627 | if (!params) |
3628 | return -ENOMEM; | |
1da177e4 | 3629 | |
ef44a1ec LZ |
3630 | oparams = memdup_user(_oparams, sizeof(*oparams)); |
3631 | if (IS_ERR(oparams)) { | |
3632 | err = PTR_ERR(oparams); | |
1da177e4 LT |
3633 | goto out; |
3634 | } | |
3635 | snd_pcm_hw_convert_from_old_params(params, oparams); | |
3636 | err = snd_pcm_hw_refine(substream, params); | |
f74ae15f TS |
3637 | if (err < 0) |
3638 | goto out_old; | |
ef44a1ec | 3639 | |
f74ae15f TS |
3640 | err = fixup_unreferenced_params(substream, params); |
3641 | if (err < 0) | |
3642 | goto out_old; | |
ef44a1ec | 3643 | |
f74ae15f TS |
3644 | snd_pcm_hw_convert_to_old_params(oparams, params); |
3645 | if (copy_to_user(_oparams, oparams, sizeof(*oparams))) | |
3646 | err = -EFAULT; | |
3647 | out_old: | |
ef44a1ec | 3648 | kfree(oparams); |
1da177e4 LT |
3649 | out: |
3650 | kfree(params); | |
1da177e4 LT |
3651 | return err; |
3652 | } | |
3653 | ||
877211f5 TI |
3654 | static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, |
3655 | struct snd_pcm_hw_params_old __user * _oparams) | |
1da177e4 | 3656 | { |
877211f5 TI |
3657 | struct snd_pcm_hw_params *params; |
3658 | struct snd_pcm_hw_params_old *oparams = NULL; | |
1da177e4 LT |
3659 | int err; |
3660 | ||
3661 | params = kmalloc(sizeof(*params), GFP_KERNEL); | |
ef44a1ec LZ |
3662 | if (!params) |
3663 | return -ENOMEM; | |
3664 | ||
3665 | oparams = memdup_user(_oparams, sizeof(*oparams)); | |
3666 | if (IS_ERR(oparams)) { | |
3667 | err = PTR_ERR(oparams); | |
1da177e4 LT |
3668 | goto out; |
3669 | } | |
f74ae15f | 3670 | |
1da177e4 LT |
3671 | snd_pcm_hw_convert_from_old_params(params, oparams); |
3672 | err = snd_pcm_hw_params(substream, params); | |
f74ae15f TS |
3673 | if (err < 0) |
3674 | goto out_old; | |
ef44a1ec | 3675 | |
f74ae15f TS |
3676 | snd_pcm_hw_convert_to_old_params(oparams, params); |
3677 | if (copy_to_user(_oparams, oparams, sizeof(*oparams))) | |
3678 | err = -EFAULT; | |
3679 | out_old: | |
ef44a1ec | 3680 | kfree(oparams); |
1da177e4 LT |
3681 | out: |
3682 | kfree(params); | |
1da177e4 LT |
3683 | return err; |
3684 | } | |
59d48582 | 3685 | #endif /* CONFIG_SND_SUPPORT_OLD_API */ |
1da177e4 | 3686 | |
7003609b | 3687 | #ifndef CONFIG_MMU |
55c63bd2 DG |
3688 | static unsigned long snd_pcm_get_unmapped_area(struct file *file, |
3689 | unsigned long addr, | |
3690 | unsigned long len, | |
3691 | unsigned long pgoff, | |
3692 | unsigned long flags) | |
3693 | { | |
3694 | struct snd_pcm_file *pcm_file = file->private_data; | |
3695 | struct snd_pcm_substream *substream = pcm_file->substream; | |
3696 | struct snd_pcm_runtime *runtime = substream->runtime; | |
3697 | unsigned long offset = pgoff << PAGE_SHIFT; | |
3698 | ||
3699 | switch (offset) { | |
3700 | case SNDRV_PCM_MMAP_OFFSET_STATUS: | |
3701 | return (unsigned long)runtime->status; | |
3702 | case SNDRV_PCM_MMAP_OFFSET_CONTROL: | |
3703 | return (unsigned long)runtime->control; | |
3704 | default: | |
3705 | return (unsigned long)runtime->dma_area + offset; | |
3706 | } | |
7003609b CC |
3707 | } |
3708 | #else | |
55c63bd2 | 3709 | # define snd_pcm_get_unmapped_area NULL |
7003609b CC |
3710 | #endif |
3711 | ||
1da177e4 LT |
3712 | /* |
3713 | * Register section | |
3714 | */ | |
3715 | ||
9c2e08c5 | 3716 | const struct file_operations snd_pcm_f_ops[2] = { |
1da177e4 | 3717 | { |
2af677fc CL |
3718 | .owner = THIS_MODULE, |
3719 | .write = snd_pcm_write, | |
1c65d986 | 3720 | .write_iter = snd_pcm_writev, |
f87135f5 | 3721 | .open = snd_pcm_playback_open, |
2af677fc | 3722 | .release = snd_pcm_release, |
02f4865f | 3723 | .llseek = no_llseek, |
2af677fc | 3724 | .poll = snd_pcm_playback_poll, |
67616fed | 3725 | .unlocked_ioctl = snd_pcm_ioctl, |
2af677fc CL |
3726 | .compat_ioctl = snd_pcm_ioctl_compat, |
3727 | .mmap = snd_pcm_mmap, | |
3728 | .fasync = snd_pcm_fasync, | |
55c63bd2 | 3729 | .get_unmapped_area = snd_pcm_get_unmapped_area, |
1da177e4 LT |
3730 | }, |
3731 | { | |
2af677fc CL |
3732 | .owner = THIS_MODULE, |
3733 | .read = snd_pcm_read, | |
1c65d986 | 3734 | .read_iter = snd_pcm_readv, |
f87135f5 | 3735 | .open = snd_pcm_capture_open, |
2af677fc | 3736 | .release = snd_pcm_release, |
02f4865f | 3737 | .llseek = no_llseek, |
2af677fc | 3738 | .poll = snd_pcm_capture_poll, |
67616fed | 3739 | .unlocked_ioctl = snd_pcm_ioctl, |
2af677fc CL |
3740 | .compat_ioctl = snd_pcm_ioctl_compat, |
3741 | .mmap = snd_pcm_mmap, | |
3742 | .fasync = snd_pcm_fasync, | |
55c63bd2 | 3743 | .get_unmapped_area = snd_pcm_get_unmapped_area, |
1da177e4 LT |
3744 | } |
3745 | }; |