FreeBSD/Linux Kernel Cross Reference
sys/dev/sound/pcm/dsp.c
1 /*-
2 * Copyright (c) 2005-2009 Ariff Abdullah <ariff@FreeBSD.org>
3 * Portions Copyright (c) Ryan Beasley <ryan.beasley@gmail.com> - GSoC 2006
4 * Copyright (c) 1999 Cameron Grant <cg@FreeBSD.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #ifdef HAVE_KERNEL_OPTION_HEADERS
30 #include "opt_snd.h"
31 #endif
32
33 #include <dev/sound/pcm/sound.h>
34 #include <sys/ctype.h>
35 #include <sys/lock.h>
36 #include <sys/rwlock.h>
37 #include <sys/sysent.h>
38
39 #include <vm/vm.h>
40 #include <vm/vm_object.h>
41 #include <vm/vm_page.h>
42 #include <vm/vm_pager.h>
43
44 SND_DECLARE_FILE("$FreeBSD: releng/11.2/sys/dev/sound/pcm/dsp.c 331722 2018-03-29 02:50:57Z eadler $");
45
46 static int dsp_mmap_allow_prot_exec = 0;
47 SYSCTL_INT(_hw_snd, OID_AUTO, compat_linux_mmap, CTLFLAG_RWTUN,
48 &dsp_mmap_allow_prot_exec, 0,
49 "linux mmap compatibility (-1=force disable 0=auto 1=force enable)");
50
51 static int dsp_basename_clone = 1;
52 SYSCTL_INT(_hw_snd, OID_AUTO, basename_clone, CTLFLAG_RWTUN,
53 &dsp_basename_clone, 0,
54 "DSP basename cloning (0: Disable; 1: Enabled)");
55
56 struct dsp_cdevinfo {
57 struct pcm_channel *rdch, *wrch;
58 struct pcm_channel *volch;
59 int busy, simplex;
60 TAILQ_ENTRY(dsp_cdevinfo) link;
61 };
62
63 #define PCM_RDCH(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->rdch)
64 #define PCM_WRCH(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->wrch)
65 #define PCM_VOLCH(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->volch)
66 #define PCM_SIMPLEX(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->simplex)
67
68 #define DSP_CDEVINFO_CACHESIZE 8
69
70 #define DSP_REGISTERED(x, y) (PCM_REGISTERED(x) && \
71 (y) != NULL && (y)->si_drv1 != NULL)
72
73 #define OLDPCM_IOCTL
74
75 static d_open_t dsp_open;
76 static d_close_t dsp_close;
77 static d_read_t dsp_read;
78 static d_write_t dsp_write;
79 static d_ioctl_t dsp_ioctl;
80 static d_poll_t dsp_poll;
81 static d_mmap_t dsp_mmap;
82 static d_mmap_single_t dsp_mmap_single;
83
84 struct cdevsw dsp_cdevsw = {
85 .d_version = D_VERSION,
86 .d_open = dsp_open,
87 .d_close = dsp_close,
88 .d_read = dsp_read,
89 .d_write = dsp_write,
90 .d_ioctl = dsp_ioctl,
91 .d_poll = dsp_poll,
92 .d_mmap = dsp_mmap,
93 .d_mmap_single = dsp_mmap_single,
94 .d_name = "dsp",
95 };
96
97 static eventhandler_tag dsp_ehtag = NULL;
98 static int dsp_umax = -1;
99 static int dsp_cmax = -1;
100
101 static int dsp_oss_syncgroup(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_syncgroup *group);
102 static int dsp_oss_syncstart(int sg_id);
103 static int dsp_oss_policy(struct pcm_channel *wrch, struct pcm_channel *rdch, int policy);
104 static int dsp_oss_cookedmode(struct pcm_channel *wrch, struct pcm_channel *rdch, int enabled);
105 static int dsp_oss_getchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map);
106 static int dsp_oss_setchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map);
107 static int dsp_oss_getchannelmask(struct pcm_channel *wrch, struct pcm_channel *rdch, int *mask);
108 #ifdef OSSV4_EXPERIMENT
109 static int dsp_oss_getlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label);
110 static int dsp_oss_setlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label);
111 static int dsp_oss_getsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song);
112 static int dsp_oss_setsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song);
113 static int dsp_oss_setname(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *name);
114 #endif
115
116 static struct snddev_info *
117 dsp_get_info(struct cdev *dev)
118 {
119 return (devclass_get_softc(pcm_devclass, PCMUNIT(dev)));
120 }
121
122 static uint32_t
123 dsp_get_flags(struct cdev *dev)
124 {
125 device_t bdev;
126
127 bdev = devclass_get_device(pcm_devclass, PCMUNIT(dev));
128
129 return ((bdev != NULL) ? pcm_getflags(bdev) : 0xffffffff);
130 }
131
132 static void
133 dsp_set_flags(struct cdev *dev, uint32_t flags)
134 {
135 device_t bdev;
136
137 bdev = devclass_get_device(pcm_devclass, PCMUNIT(dev));
138
139 if (bdev != NULL)
140 pcm_setflags(bdev, flags);
141 }
142
143 /*
144 * return the channels associated with an open device instance.
145 * lock channels specified.
146 */
147 static int
148 getchns(struct cdev *dev, struct pcm_channel **rdch, struct pcm_channel **wrch,
149 uint32_t prio)
150 {
151 struct snddev_info *d;
152 struct pcm_channel *ch;
153 uint32_t flags;
154
155 if (PCM_SIMPLEX(dev) != 0) {
156 d = dsp_get_info(dev);
157 if (!PCM_REGISTERED(d))
158 return (ENXIO);
159 PCM_LOCK(d);
160 PCM_WAIT(d);
161 PCM_ACQUIRE(d);
162 /*
163 * Note: order is important -
164 * pcm flags -> prio query flags -> wild guess
165 */
166 ch = NULL;
167 flags = dsp_get_flags(dev);
168 if (flags & SD_F_PRIO_WR) {
169 ch = PCM_RDCH(dev);
170 PCM_RDCH(dev) = NULL;
171 } else if (flags & SD_F_PRIO_RD) {
172 ch = PCM_WRCH(dev);
173 PCM_WRCH(dev) = NULL;
174 } else if (prio & SD_F_PRIO_WR) {
175 ch = PCM_RDCH(dev);
176 PCM_RDCH(dev) = NULL;
177 flags |= SD_F_PRIO_WR;
178 } else if (prio & SD_F_PRIO_RD) {
179 ch = PCM_WRCH(dev);
180 PCM_WRCH(dev) = NULL;
181 flags |= SD_F_PRIO_RD;
182 } else if (PCM_WRCH(dev) != NULL) {
183 ch = PCM_RDCH(dev);
184 PCM_RDCH(dev) = NULL;
185 flags |= SD_F_PRIO_WR;
186 } else if (PCM_RDCH(dev) != NULL) {
187 ch = PCM_WRCH(dev);
188 PCM_WRCH(dev) = NULL;
189 flags |= SD_F_PRIO_RD;
190 }
191 PCM_SIMPLEX(dev) = 0;
192 dsp_set_flags(dev, flags);
193 if (ch != NULL) {
194 CHN_LOCK(ch);
195 pcm_chnref(ch, -1);
196 pcm_chnrelease(ch);
197 }
198 PCM_RELEASE(d);
199 PCM_UNLOCK(d);
200 }
201
202 *rdch = PCM_RDCH(dev);
203 *wrch = PCM_WRCH(dev);
204
205 if (*rdch != NULL && (prio & SD_F_PRIO_RD))
206 CHN_LOCK(*rdch);
207 if (*wrch != NULL && (prio & SD_F_PRIO_WR))
208 CHN_LOCK(*wrch);
209
210 return (0);
211 }
212
213 /* unlock specified channels */
214 static void
215 relchns(struct cdev *dev, struct pcm_channel *rdch, struct pcm_channel *wrch,
216 uint32_t prio)
217 {
218 if (wrch != NULL && (prio & SD_F_PRIO_WR))
219 CHN_UNLOCK(wrch);
220 if (rdch != NULL && (prio & SD_F_PRIO_RD))
221 CHN_UNLOCK(rdch);
222 }
223
224 static void
225 dsp_cdevinfo_alloc(struct cdev *dev,
226 struct pcm_channel *rdch, struct pcm_channel *wrch,
227 struct pcm_channel *volch)
228 {
229 struct snddev_info *d;
230 struct dsp_cdevinfo *cdi;
231 int simplex;
232
233 d = dsp_get_info(dev);
234
235 KASSERT(PCM_REGISTERED(d) && dev != NULL && dev->si_drv1 == NULL &&
236 ((rdch == NULL && wrch == NULL) || rdch != wrch),
237 ("bogus %s(), what are you trying to accomplish here?", __func__));
238 PCM_BUSYASSERT(d);
239 PCM_LOCKASSERT(d);
240
241 simplex = (dsp_get_flags(dev) & SD_F_SIMPLEX) ? 1 : 0;
242
243 /*
244 * Scan for free instance entry and put it into the end of list.
245 * Create new one if necessary.
246 */
247 TAILQ_FOREACH(cdi, &d->dsp_cdevinfo_pool, link) {
248 if (cdi->busy != 0)
249 break;
250 cdi->rdch = rdch;
251 cdi->wrch = wrch;
252 cdi->volch = volch;
253 cdi->simplex = simplex;
254 cdi->busy = 1;
255 TAILQ_REMOVE(&d->dsp_cdevinfo_pool, cdi, link);
256 TAILQ_INSERT_TAIL(&d->dsp_cdevinfo_pool, cdi, link);
257 dev->si_drv1 = cdi;
258 return;
259 }
260 PCM_UNLOCK(d);
261 cdi = malloc(sizeof(*cdi), M_DEVBUF, M_WAITOK | M_ZERO);
262 PCM_LOCK(d);
263 cdi->rdch = rdch;
264 cdi->wrch = wrch;
265 cdi->volch = volch;
266 cdi->simplex = simplex;
267 cdi->busy = 1;
268 TAILQ_INSERT_TAIL(&d->dsp_cdevinfo_pool, cdi, link);
269 dev->si_drv1 = cdi;
270 }
271
272 static void
273 dsp_cdevinfo_free(struct cdev *dev)
274 {
275 struct snddev_info *d;
276 struct dsp_cdevinfo *cdi, *tmp;
277 uint32_t flags;
278 int i;
279
280 d = dsp_get_info(dev);
281
282 KASSERT(PCM_REGISTERED(d) && dev != NULL && dev->si_drv1 != NULL &&
283 PCM_RDCH(dev) == NULL && PCM_WRCH(dev) == NULL &&
284 PCM_VOLCH(dev) == NULL,
285 ("bogus %s(), what are you trying to accomplish here?", __func__));
286 PCM_BUSYASSERT(d);
287 PCM_LOCKASSERT(d);
288
289 cdi = dev->si_drv1;
290 dev->si_drv1 = NULL;
291 cdi->rdch = NULL;
292 cdi->wrch = NULL;
293 cdi->volch = NULL;
294 cdi->simplex = 0;
295 cdi->busy = 0;
296
297 /*
298 * Once it is free, move it back to the beginning of list for
299 * faster new entry allocation.
300 */
301 TAILQ_REMOVE(&d->dsp_cdevinfo_pool, cdi, link);
302 TAILQ_INSERT_HEAD(&d->dsp_cdevinfo_pool, cdi, link);
303
304 /*
305 * Scan the list, cache free entries up to DSP_CDEVINFO_CACHESIZE.
306 * Reset simplex flags.
307 */
308 flags = dsp_get_flags(dev) & ~SD_F_PRIO_SET;
309 i = DSP_CDEVINFO_CACHESIZE;
310 TAILQ_FOREACH_SAFE(cdi, &d->dsp_cdevinfo_pool, link, tmp) {
311 if (cdi->busy != 0) {
312 if (cdi->simplex == 0) {
313 if (cdi->rdch != NULL)
314 flags |= SD_F_PRIO_RD;
315 if (cdi->wrch != NULL)
316 flags |= SD_F_PRIO_WR;
317 }
318 } else {
319 if (i == 0) {
320 TAILQ_REMOVE(&d->dsp_cdevinfo_pool, cdi, link);
321 free(cdi, M_DEVBUF);
322 } else
323 i--;
324 }
325 }
326 dsp_set_flags(dev, flags);
327 }
328
329 void
330 dsp_cdevinfo_init(struct snddev_info *d)
331 {
332 struct dsp_cdevinfo *cdi;
333 int i;
334
335 KASSERT(d != NULL, ("NULL snddev_info"));
336 PCM_BUSYASSERT(d);
337 PCM_UNLOCKASSERT(d);
338
339 TAILQ_INIT(&d->dsp_cdevinfo_pool);
340 for (i = 0; i < DSP_CDEVINFO_CACHESIZE; i++) {
341 cdi = malloc(sizeof(*cdi), M_DEVBUF, M_WAITOK | M_ZERO);
342 TAILQ_INSERT_HEAD(&d->dsp_cdevinfo_pool, cdi, link);
343 }
344 }
345
346 void
347 dsp_cdevinfo_flush(struct snddev_info *d)
348 {
349 struct dsp_cdevinfo *cdi, *tmp;
350
351 KASSERT(d != NULL, ("NULL snddev_info"));
352 PCM_BUSYASSERT(d);
353 PCM_UNLOCKASSERT(d);
354
355 cdi = TAILQ_FIRST(&d->dsp_cdevinfo_pool);
356 while (cdi != NULL) {
357 tmp = TAILQ_NEXT(cdi, link);
358 free(cdi, M_DEVBUF);
359 cdi = tmp;
360 }
361 TAILQ_INIT(&d->dsp_cdevinfo_pool);
362 }
363
364 /* duplex / simplex cdev type */
365 enum {
366 DSP_CDEV_TYPE_RDONLY, /* simplex read-only (record) */
367 DSP_CDEV_TYPE_WRONLY, /* simplex write-only (play) */
368 DSP_CDEV_TYPE_RDWR /* duplex read, write, or both */
369 };
370
371 enum {
372 DSP_CDEV_VOLCTL_NONE,
373 DSP_CDEV_VOLCTL_READ,
374 DSP_CDEV_VOLCTL_WRITE
375 };
376
377 #define DSP_F_VALID(x) ((x) & (FREAD | FWRITE))
378 #define DSP_F_DUPLEX(x) (((x) & (FREAD | FWRITE)) == (FREAD | FWRITE))
379 #define DSP_F_SIMPLEX(x) (!DSP_F_DUPLEX(x))
380 #define DSP_F_READ(x) ((x) & FREAD)
381 #define DSP_F_WRITE(x) ((x) & FWRITE)
382
383 static const struct {
384 int type;
385 char *name;
386 char *sep;
387 char *alias;
388 int use_sep;
389 int hw;
390 int max;
391 int volctl;
392 uint32_t fmt, spd;
393 int query;
394 } dsp_cdevs[] = {
395 { SND_DEV_DSP, "dsp", ".", NULL, 0, 0, 0, 0,
396 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
397 DSP_CDEV_TYPE_RDWR },
398 { SND_DEV_AUDIO, "audio", ".", NULL, 0, 0, 0, 0,
399 SND_FORMAT(AFMT_MU_LAW, 1, 0), DSP_DEFAULT_SPEED,
400 DSP_CDEV_TYPE_RDWR },
401 { SND_DEV_DSP16, "dspW", ".", NULL, 0, 0, 0, 0,
402 SND_FORMAT(AFMT_S16_LE, 1, 0), DSP_DEFAULT_SPEED,
403 DSP_CDEV_TYPE_RDWR },
404 { SND_DEV_DSPHW_PLAY, "dsp", ".p", NULL, 1, 1, SND_MAXHWCHAN, 1,
405 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_WRONLY },
406 { SND_DEV_DSPHW_VPLAY, "dsp", ".vp", NULL, 1, 1, SND_MAXVCHANS, 1,
407 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_WRONLY },
408 { SND_DEV_DSPHW_REC, "dsp", ".r", NULL, 1, 1, SND_MAXHWCHAN, 1,
409 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_RDONLY },
410 { SND_DEV_DSPHW_VREC, "dsp", ".vr", NULL, 1, 1, SND_MAXVCHANS, 1,
411 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_RDONLY },
412 { SND_DEV_DSPHW_CD, "dspcd", ".", NULL, 0, 0, 0, 0,
413 SND_FORMAT(AFMT_S16_LE, 2, 0), 44100, DSP_CDEV_TYPE_RDWR },
414 /* Low priority, OSSv4 aliases. */
415 { SND_DEV_DSP, "dsp_ac3", ".", "dsp", 0, 0, 0, 0,
416 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
417 DSP_CDEV_TYPE_RDWR },
418 { SND_DEV_DSP, "dsp_mmap", ".", "dsp", 0, 0, 0, 0,
419 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
420 DSP_CDEV_TYPE_RDWR },
421 { SND_DEV_DSP, "dsp_multich", ".", "dsp", 0, 0, 0, 0,
422 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
423 DSP_CDEV_TYPE_RDWR },
424 { SND_DEV_DSP, "dsp_spdifout", ".", "dsp", 0, 0, 0, 0,
425 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
426 DSP_CDEV_TYPE_RDWR },
427 { SND_DEV_DSP, "dsp_spdifin", ".", "dsp", 0, 0, 0, 0,
428 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
429 DSP_CDEV_TYPE_RDWR },
430 };
431
432 #define DSP_FIXUP_ERROR() do { \
433 prio = dsp_get_flags(i_dev); \
434 if (!DSP_F_VALID(flags)) \
435 error = EINVAL; \
436 if (!DSP_F_DUPLEX(flags) && \
437 ((DSP_F_READ(flags) && d->reccount == 0) || \
438 (DSP_F_WRITE(flags) && d->playcount == 0))) \
439 error = ENOTSUP; \
440 else if (!DSP_F_DUPLEX(flags) && (prio & SD_F_SIMPLEX) && \
441 ((DSP_F_READ(flags) && (prio & SD_F_PRIO_WR)) || \
442 (DSP_F_WRITE(flags) && (prio & SD_F_PRIO_RD)))) \
443 error = EBUSY; \
444 else if (DSP_REGISTERED(d, i_dev)) \
445 error = EBUSY; \
446 } while (0)
447
448 static int
449 dsp_open(struct cdev *i_dev, int flags, int mode, struct thread *td)
450 {
451 struct pcm_channel *rdch, *wrch;
452 struct snddev_info *d;
453 uint32_t fmt, spd, prio, volctl;
454 int i, error, rderror, wrerror, devtype, wdevunit, rdevunit;
455
456 /* Kind of impossible.. */
457 if (i_dev == NULL || td == NULL)
458 return (ENODEV);
459
460 d = dsp_get_info(i_dev);
461 if (!PCM_REGISTERED(d))
462 return (EBADF);
463
464 PCM_GIANT_ENTER(d);
465
466 /* Lock snddev so nobody else can monkey with it. */
467 PCM_LOCK(d);
468 PCM_WAIT(d);
469
470 /*
471 * Try to acquire cloned device before someone else pick it.
472 * ENODEV means this is not a cloned droids.
473 */
474 error = snd_clone_acquire(i_dev);
475 if (!(error == 0 || error == ENODEV)) {
476 DSP_FIXUP_ERROR();
477 PCM_UNLOCK(d);
478 PCM_GIANT_EXIT(d);
479 return (error);
480 }
481
482 error = 0;
483 DSP_FIXUP_ERROR();
484
485 if (error != 0) {
486 (void)snd_clone_release(i_dev);
487 PCM_UNLOCK(d);
488 PCM_GIANT_EXIT(d);
489 return (error);
490 }
491
492 /*
493 * That is just enough. Acquire and unlock pcm lock so
494 * the other will just have to wait until we finish doing
495 * everything.
496 */
497 PCM_ACQUIRE(d);
498 PCM_UNLOCK(d);
499
500 devtype = PCMDEV(i_dev);
501 wdevunit = -1;
502 rdevunit = -1;
503 fmt = 0;
504 spd = 0;
505 volctl = DSP_CDEV_VOLCTL_NONE;
506
507 for (i = 0; i < (sizeof(dsp_cdevs) / sizeof(dsp_cdevs[0])); i++) {
508 if (devtype != dsp_cdevs[i].type || dsp_cdevs[i].alias != NULL)
509 continue;
510 /*
511 * Volume control only valid for DSPHW devices,
512 * and it must be opened in opposite direction be it
513 * simplex or duplex. Anything else will be handled
514 * as usual.
515 */
516 if (dsp_cdevs[i].query == DSP_CDEV_TYPE_WRONLY) {
517 if (dsp_cdevs[i].volctl != 0 &&
518 DSP_F_READ(flags)) {
519 volctl = DSP_CDEV_VOLCTL_WRITE;
520 flags &= ~FREAD;
521 flags |= FWRITE;
522 }
523 if (DSP_F_READ(flags)) {
524 (void)snd_clone_release(i_dev);
525 PCM_RELEASE_QUICK(d);
526 PCM_GIANT_EXIT(d);
527 return (ENOTSUP);
528 }
529 wdevunit = dev2unit(i_dev);
530 } else if (dsp_cdevs[i].query == DSP_CDEV_TYPE_RDONLY) {
531 if (dsp_cdevs[i].volctl != 0 &&
532 DSP_F_WRITE(flags)) {
533 volctl = DSP_CDEV_VOLCTL_READ;
534 flags &= ~FWRITE;
535 flags |= FREAD;
536 }
537 if (DSP_F_WRITE(flags)) {
538 (void)snd_clone_release(i_dev);
539 PCM_RELEASE_QUICK(d);
540 PCM_GIANT_EXIT(d);
541 return (ENOTSUP);
542 }
543 rdevunit = dev2unit(i_dev);
544 }
545 fmt = dsp_cdevs[i].fmt;
546 spd = dsp_cdevs[i].spd;
547 break;
548 }
549
550 /* No matching devtype? */
551 if (fmt == 0 || spd == 0)
552 panic("impossible devtype %d", devtype);
553
554 rdch = NULL;
555 wrch = NULL;
556 rderror = 0;
557 wrerror = 0;
558
559 /*
560 * if we get here, the open request is valid- either:
561 * * we were previously not open
562 * * we were open for play xor record and the opener wants
563 * the non-open direction
564 */
565 if (DSP_F_READ(flags)) {
566 /* open for read */
567 rderror = pcm_chnalloc(d, &rdch, PCMDIR_REC,
568 td->td_proc->p_pid, td->td_proc->p_comm, rdevunit);
569
570 if (rderror == 0 && chn_reset(rdch, fmt, spd) != 0)
571 rderror = ENXIO;
572
573 if (volctl == DSP_CDEV_VOLCTL_READ)
574 rderror = 0;
575
576 if (rderror != 0) {
577 if (rdch != NULL)
578 pcm_chnrelease(rdch);
579 if (!DSP_F_DUPLEX(flags)) {
580 (void)snd_clone_release(i_dev);
581 PCM_RELEASE_QUICK(d);
582 PCM_GIANT_EXIT(d);
583 return (rderror);
584 }
585 rdch = NULL;
586 } else if (volctl == DSP_CDEV_VOLCTL_READ) {
587 if (rdch != NULL) {
588 pcm_chnref(rdch, 1);
589 pcm_chnrelease(rdch);
590 }
591 } else {
592 if (flags & O_NONBLOCK)
593 rdch->flags |= CHN_F_NBIO;
594 if (flags & O_EXCL)
595 rdch->flags |= CHN_F_EXCLUSIVE;
596 pcm_chnref(rdch, 1);
597 if (volctl == DSP_CDEV_VOLCTL_NONE)
598 chn_vpc_reset(rdch, SND_VOL_C_PCM, 0);
599 CHN_UNLOCK(rdch);
600 }
601 }
602
603 if (DSP_F_WRITE(flags)) {
604 /* open for write */
605 wrerror = pcm_chnalloc(d, &wrch, PCMDIR_PLAY,
606 td->td_proc->p_pid, td->td_proc->p_comm, wdevunit);
607
608 if (wrerror == 0 && chn_reset(wrch, fmt, spd) != 0)
609 wrerror = ENXIO;
610
611 if (volctl == DSP_CDEV_VOLCTL_WRITE)
612 wrerror = 0;
613
614 if (wrerror != 0) {
615 if (wrch != NULL)
616 pcm_chnrelease(wrch);
617 if (!DSP_F_DUPLEX(flags)) {
618 if (rdch != NULL) {
619 /*
620 * Lock, deref and release previously
621 * created record channel
622 */
623 CHN_LOCK(rdch);
624 pcm_chnref(rdch, -1);
625 pcm_chnrelease(rdch);
626 }
627 (void)snd_clone_release(i_dev);
628 PCM_RELEASE_QUICK(d);
629 PCM_GIANT_EXIT(d);
630 return (wrerror);
631 }
632 wrch = NULL;
633 } else if (volctl == DSP_CDEV_VOLCTL_WRITE) {
634 if (wrch != NULL) {
635 pcm_chnref(wrch, 1);
636 pcm_chnrelease(wrch);
637 }
638 } else {
639 if (flags & O_NONBLOCK)
640 wrch->flags |= CHN_F_NBIO;
641 if (flags & O_EXCL)
642 wrch->flags |= CHN_F_EXCLUSIVE;
643 pcm_chnref(wrch, 1);
644 if (volctl == DSP_CDEV_VOLCTL_NONE)
645 chn_vpc_reset(wrch, SND_VOL_C_PCM, 0);
646 CHN_UNLOCK(wrch);
647 }
648 }
649
650
651 PCM_LOCK(d);
652
653 /*
654 * We're done. Allocate channels information for this cdev.
655 */
656 switch (volctl) {
657 case DSP_CDEV_VOLCTL_READ:
658 KASSERT(wrch == NULL, ("wrch=%p not null!", wrch));
659 dsp_cdevinfo_alloc(i_dev, NULL, NULL, rdch);
660 break;
661 case DSP_CDEV_VOLCTL_WRITE:
662 KASSERT(rdch == NULL, ("rdch=%p not null!", rdch));
663 dsp_cdevinfo_alloc(i_dev, NULL, NULL, wrch);
664 break;
665 case DSP_CDEV_VOLCTL_NONE:
666 default:
667 if (wrch == NULL && rdch == NULL) {
668 (void)snd_clone_release(i_dev);
669 PCM_RELEASE(d);
670 PCM_UNLOCK(d);
671 PCM_GIANT_EXIT(d);
672 if (wrerror != 0)
673 return (wrerror);
674 if (rderror != 0)
675 return (rderror);
676 return (EINVAL);
677 }
678 dsp_cdevinfo_alloc(i_dev, rdch, wrch, NULL);
679 if (rdch != NULL)
680 CHN_INSERT_HEAD(d, rdch, channels.pcm.opened);
681 if (wrch != NULL)
682 CHN_INSERT_HEAD(d, wrch, channels.pcm.opened);
683 break;
684 }
685
686 /*
687 * Increase clone refcount for its automatic garbage collector.
688 */
689 (void)snd_clone_ref(i_dev);
690
691 PCM_RELEASE(d);
692 PCM_UNLOCK(d);
693
694 PCM_GIANT_LEAVE(d);
695
696 return (0);
697 }
698
699 static int
700 dsp_close(struct cdev *i_dev, int flags, int mode, struct thread *td)
701 {
702 struct pcm_channel *rdch, *wrch, *volch;
703 struct snddev_info *d;
704 int sg_ids, rdref, wdref;
705
706 d = dsp_get_info(i_dev);
707 if (!DSP_REGISTERED(d, i_dev))
708 return (EBADF);
709
710 PCM_GIANT_ENTER(d);
711
712 PCM_LOCK(d);
713 PCM_WAIT(d);
714 PCM_ACQUIRE(d);
715
716 rdch = PCM_RDCH(i_dev);
717 wrch = PCM_WRCH(i_dev);
718 volch = PCM_VOLCH(i_dev);
719
720 PCM_RDCH(i_dev) = NULL;
721 PCM_WRCH(i_dev) = NULL;
722 PCM_VOLCH(i_dev) = NULL;
723
724 rdref = -1;
725 wdref = -1;
726
727 if (volch != NULL) {
728 if (volch == rdch)
729 rdref--;
730 else if (volch == wrch)
731 wdref--;
732 else {
733 CHN_LOCK(volch);
734 pcm_chnref(volch, -1);
735 CHN_UNLOCK(volch);
736 }
737 }
738
739 if (rdch != NULL)
740 CHN_REMOVE(d, rdch, channels.pcm.opened);
741 if (wrch != NULL)
742 CHN_REMOVE(d, wrch, channels.pcm.opened);
743
744 if (rdch != NULL || wrch != NULL) {
745 PCM_UNLOCK(d);
746 if (rdch != NULL) {
747 /*
748 * The channel itself need not be locked because:
749 * a) Adding a channel to a syncgroup happens only
750 * in dsp_ioctl(), which cannot run concurrently
751 * to dsp_close().
752 * b) The syncmember pointer (sm) is protected by
753 * the global syncgroup list lock.
754 * c) A channel can't just disappear, invalidating
755 * pointers, unless it's closed/dereferenced
756 * first.
757 */
758 PCM_SG_LOCK();
759 sg_ids = chn_syncdestroy(rdch);
760 PCM_SG_UNLOCK();
761 if (sg_ids != 0)
762 free_unr(pcmsg_unrhdr, sg_ids);
763
764 CHN_LOCK(rdch);
765 pcm_chnref(rdch, rdref);
766 chn_abort(rdch); /* won't sleep */
767 rdch->flags &= ~(CHN_F_RUNNING | CHN_F_MMAP |
768 CHN_F_DEAD | CHN_F_EXCLUSIVE);
769 chn_reset(rdch, 0, 0);
770 pcm_chnrelease(rdch);
771 }
772 if (wrch != NULL) {
773 /*
774 * Please see block above.
775 */
776 PCM_SG_LOCK();
777 sg_ids = chn_syncdestroy(wrch);
778 PCM_SG_UNLOCK();
779 if (sg_ids != 0)
780 free_unr(pcmsg_unrhdr, sg_ids);
781
782 CHN_LOCK(wrch);
783 pcm_chnref(wrch, wdref);
784 chn_flush(wrch); /* may sleep */
785 wrch->flags &= ~(CHN_F_RUNNING | CHN_F_MMAP |
786 CHN_F_DEAD | CHN_F_EXCLUSIVE);
787 chn_reset(wrch, 0, 0);
788 pcm_chnrelease(wrch);
789 }
790 PCM_LOCK(d);
791 }
792
793 dsp_cdevinfo_free(i_dev);
794 /*
795 * Release clone busy state and unref it so the automatic
796 * garbage collector will get the hint and do the remaining
797 * cleanup process.
798 */
799 (void)snd_clone_release(i_dev);
800
801 /*
802 * destroy_dev() might sleep, so release pcm lock
803 * here and rely on pcm cv serialization.
804 */
805 PCM_UNLOCK(d);
806 (void)snd_clone_unref(i_dev);
807 PCM_LOCK(d);
808
809 PCM_RELEASE(d);
810 PCM_UNLOCK(d);
811
812 PCM_GIANT_LEAVE(d);
813
814 return (0);
815 }
816
817 static __inline int
818 dsp_io_ops(struct cdev *i_dev, struct uio *buf)
819 {
820 struct snddev_info *d;
821 struct pcm_channel **ch, *rdch, *wrch;
822 int (*chn_io)(struct pcm_channel *, struct uio *);
823 int prio, ret;
824 pid_t runpid;
825
826 KASSERT(i_dev != NULL && buf != NULL &&
827 (buf->uio_rw == UIO_READ || buf->uio_rw == UIO_WRITE),
828 ("%s(): io train wreck!", __func__));
829
830 d = dsp_get_info(i_dev);
831 if (!DSP_REGISTERED(d, i_dev))
832 return (EBADF);
833
834 PCM_GIANT_ENTER(d);
835
836 switch (buf->uio_rw) {
837 case UIO_READ:
838 prio = SD_F_PRIO_RD;
839 ch = &rdch;
840 chn_io = chn_read;
841 break;
842 case UIO_WRITE:
843 prio = SD_F_PRIO_WR;
844 ch = &wrch;
845 chn_io = chn_write;
846 break;
847 default:
848 panic("invalid/corrupted uio direction: %d", buf->uio_rw);
849 break;
850 }
851
852 rdch = NULL;
853 wrch = NULL;
854 runpid = buf->uio_td->td_proc->p_pid;
855
856 getchns(i_dev, &rdch, &wrch, prio);
857
858 if (*ch == NULL || !((*ch)->flags & CHN_F_BUSY)) {
859 PCM_GIANT_EXIT(d);
860 return (EBADF);
861 }
862
863 if (((*ch)->flags & (CHN_F_MMAP | CHN_F_DEAD)) ||
864 (((*ch)->flags & CHN_F_RUNNING) && (*ch)->pid != runpid)) {
865 relchns(i_dev, rdch, wrch, prio);
866 PCM_GIANT_EXIT(d);
867 return (EINVAL);
868 } else if (!((*ch)->flags & CHN_F_RUNNING)) {
869 (*ch)->flags |= CHN_F_RUNNING;
870 (*ch)->pid = runpid;
871 }
872
873 /*
874 * chn_read/write must give up channel lock in order to copy bytes
875 * from/to userland, so up the "in progress" counter to make sure
876 * someone else doesn't come along and muss up the buffer.
877 */
878 ++(*ch)->inprog;
879 ret = chn_io(*ch, buf);
880 --(*ch)->inprog;
881
882 CHN_BROADCAST(&(*ch)->cv);
883
884 relchns(i_dev, rdch, wrch, prio);
885
886 PCM_GIANT_LEAVE(d);
887
888 return (ret);
889 }
890
891 static int
892 dsp_read(struct cdev *i_dev, struct uio *buf, int flag)
893 {
894 return (dsp_io_ops(i_dev, buf));
895 }
896
897 static int
898 dsp_write(struct cdev *i_dev, struct uio *buf, int flag)
899 {
900 return (dsp_io_ops(i_dev, buf));
901 }
902
903 static int
904 dsp_get_volume_channel(struct cdev *dev, struct pcm_channel **volch)
905 {
906 struct snddev_info *d;
907 struct pcm_channel *c;
908 int unit;
909
910 KASSERT(dev != NULL && volch != NULL,
911 ("%s(): NULL query dev=%p volch=%p", __func__, dev, volch));
912
913 d = dsp_get_info(dev);
914 if (!PCM_REGISTERED(d)) {
915 *volch = NULL;
916 return (EINVAL);
917 }
918
919 PCM_UNLOCKASSERT(d);
920
921 *volch = NULL;
922
923 c = PCM_VOLCH(dev);
924 if (c != NULL) {
925 if (!(c->feederflags & (1 << FEEDER_VOLUME)))
926 return (-1);
927 *volch = c;
928 return (0);
929 }
930
931 PCM_LOCK(d);
932 PCM_WAIT(d);
933 PCM_ACQUIRE(d);
934
935 unit = dev2unit(dev);
936
937 CHN_FOREACH(c, d, channels.pcm) {
938 CHN_LOCK(c);
939 if (c->unit != unit) {
940 CHN_UNLOCK(c);
941 continue;
942 }
943 *volch = c;
944 pcm_chnref(c, 1);
945 PCM_VOLCH(dev) = c;
946 CHN_UNLOCK(c);
947 PCM_RELEASE(d);
948 PCM_UNLOCK(d);
949 return ((c->feederflags & (1 << FEEDER_VOLUME)) ? 0 : -1);
950 }
951
952 PCM_RELEASE(d);
953 PCM_UNLOCK(d);
954
955 return (EINVAL);
956 }
957
958 static int
959 dsp_ioctl_channel(struct cdev *dev, struct pcm_channel *volch, u_long cmd,
960 caddr_t arg)
961 {
962 struct snddev_info *d;
963 struct pcm_channel *rdch, *wrch;
964 int j, devtype, ret;
965
966 d = dsp_get_info(dev);
967 if (!PCM_REGISTERED(d) || !(dsp_get_flags(dev) & SD_F_VPC))
968 return (-1);
969
970 PCM_UNLOCKASSERT(d);
971
972 j = cmd & 0xff;
973
974 rdch = PCM_RDCH(dev);
975 wrch = PCM_WRCH(dev);
976
977 /* No specific channel, look into cache */
978 if (volch == NULL)
979 volch = PCM_VOLCH(dev);
980
981 /* Look harder */
982 if (volch == NULL) {
983 if (j == SOUND_MIXER_RECLEV && rdch != NULL)
984 volch = rdch;
985 else if (j == SOUND_MIXER_PCM && wrch != NULL)
986 volch = wrch;
987 }
988
989 devtype = PCMDEV(dev);
990
991 /* Look super harder */
992 if (volch == NULL &&
993 (devtype == SND_DEV_DSPHW_PLAY || devtype == SND_DEV_DSPHW_VPLAY ||
994 devtype == SND_DEV_DSPHW_REC || devtype == SND_DEV_DSPHW_VREC)) {
995 ret = dsp_get_volume_channel(dev, &volch);
996 if (ret != 0)
997 return (ret);
998 if (volch == NULL)
999 return (EINVAL);
1000 }
1001
1002 /* Final validation */
1003 if (volch != NULL) {
1004 CHN_LOCK(volch);
1005 if (!(volch->feederflags & (1 << FEEDER_VOLUME))) {
1006 CHN_UNLOCK(volch);
1007 return (-1);
1008 }
1009 if (volch->direction == PCMDIR_PLAY)
1010 wrch = volch;
1011 else
1012 rdch = volch;
1013 }
1014
1015 ret = EINVAL;
1016
1017 if (volch != NULL &&
1018 ((j == SOUND_MIXER_PCM && volch->direction == PCMDIR_PLAY) ||
1019 (j == SOUND_MIXER_RECLEV && volch->direction == PCMDIR_REC))) {
1020 if ((cmd & ~0xff) == MIXER_WRITE(0)) {
1021 int left, right, center;
1022
1023 left = *(int *)arg & 0x7f;
1024 right = ((*(int *)arg) >> 8) & 0x7f;
1025 center = (left + right) >> 1;
1026 chn_setvolume_multi(volch, SND_VOL_C_PCM, left, right,
1027 center);
1028 } else if ((cmd & ~0xff) == MIXER_READ(0)) {
1029 *(int *)arg = CHN_GETVOLUME(volch,
1030 SND_VOL_C_PCM, SND_CHN_T_FL);
1031 *(int *)arg |= CHN_GETVOLUME(volch,
1032 SND_VOL_C_PCM, SND_CHN_T_FR) << 8;
1033 }
1034 ret = 0;
1035 } else if (rdch != NULL || wrch != NULL) {
1036 switch (j) {
1037 case SOUND_MIXER_DEVMASK:
1038 case SOUND_MIXER_CAPS:
1039 case SOUND_MIXER_STEREODEVS:
1040 if ((cmd & ~0xff) == MIXER_READ(0)) {
1041 *(int *)arg = 0;
1042 if (rdch != NULL)
1043 *(int *)arg |= SOUND_MASK_RECLEV;
1044 if (wrch != NULL)
1045 *(int *)arg |= SOUND_MASK_PCM;
1046 }
1047 ret = 0;
1048 break;
1049 case SOUND_MIXER_RECMASK:
1050 case SOUND_MIXER_RECSRC:
1051 if ((cmd & ~0xff) == MIXER_READ(0))
1052 *(int *)arg = 0;
1053 ret = 0;
1054 break;
1055 default:
1056 break;
1057 }
1058 }
1059
1060 if (volch != NULL)
1061 CHN_UNLOCK(volch);
1062
1063 return (ret);
1064 }
1065
1066 static int
1067 dsp_ioctl(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode,
1068 struct thread *td)
1069 {
1070 struct pcm_channel *chn, *rdch, *wrch;
1071 struct snddev_info *d;
1072 u_long xcmd;
1073 int *arg_i, ret, tmp;
1074
1075 d = dsp_get_info(i_dev);
1076 if (!DSP_REGISTERED(d, i_dev))
1077 return (EBADF);
1078
1079 PCM_GIANT_ENTER(d);
1080
1081 arg_i = (int *)arg;
1082 ret = 0;
1083 xcmd = 0;
1084 chn = NULL;
1085
1086 if (IOCGROUP(cmd) == 'M') {
1087 if (cmd == OSS_GETVERSION) {
1088 *arg_i = SOUND_VERSION;
1089 PCM_GIANT_EXIT(d);
1090 return (0);
1091 }
1092 ret = dsp_ioctl_channel(i_dev, PCM_VOLCH(i_dev), cmd, arg);
1093 if (ret != -1) {
1094 PCM_GIANT_EXIT(d);
1095 return (ret);
1096 }
1097
1098 if (d->mixer_dev != NULL) {
1099 PCM_ACQUIRE_QUICK(d);
1100 ret = mixer_ioctl_cmd(d->mixer_dev, cmd, arg, -1, td,
1101 MIXER_CMD_DIRECT);
1102 PCM_RELEASE_QUICK(d);
1103 } else
1104 ret = EBADF;
1105
1106 PCM_GIANT_EXIT(d);
1107
1108 return (ret);
1109 }
1110
1111 /*
1112 * Certain ioctls may be made on any type of device (audio, mixer,
1113 * and MIDI). Handle those special cases here.
1114 */
1115 if (IOCGROUP(cmd) == 'X') {
1116 PCM_ACQUIRE_QUICK(d);
1117 switch(cmd) {
1118 case SNDCTL_SYSINFO:
1119 sound_oss_sysinfo((oss_sysinfo *)arg);
1120 break;
1121 case SNDCTL_CARDINFO:
1122 ret = sound_oss_card_info((oss_card_info *)arg);
1123 break;
1124 case SNDCTL_AUDIOINFO:
1125 case SNDCTL_AUDIOINFO_EX:
1126 case SNDCTL_ENGINEINFO:
1127 ret = dsp_oss_audioinfo(i_dev, (oss_audioinfo *)arg);
1128 break;
1129 case SNDCTL_MIXERINFO:
1130 ret = mixer_oss_mixerinfo(i_dev, (oss_mixerinfo *)arg);
1131 break;
1132 default:
1133 ret = EINVAL;
1134 }
1135 PCM_RELEASE_QUICK(d);
1136 PCM_GIANT_EXIT(d);
1137 return (ret);
1138 }
1139
1140 getchns(i_dev, &rdch, &wrch, 0);
1141
1142 if (wrch != NULL && (wrch->flags & CHN_F_DEAD))
1143 wrch = NULL;
1144 if (rdch != NULL && (rdch->flags & CHN_F_DEAD))
1145 rdch = NULL;
1146
1147 if (wrch == NULL && rdch == NULL) {
1148 PCM_GIANT_EXIT(d);
1149 return (EINVAL);
1150 }
1151
1152 switch(cmd) {
1153 #ifdef OLDPCM_IOCTL
1154 /*
1155 * we start with the new ioctl interface.
1156 */
1157 case AIONWRITE: /* how many bytes can write ? */
1158 if (wrch) {
1159 CHN_LOCK(wrch);
1160 /*
1161 if (wrch && wrch->bufhard.dl)
1162 while (chn_wrfeed(wrch) == 0);
1163 */
1164 *arg_i = sndbuf_getfree(wrch->bufsoft);
1165 CHN_UNLOCK(wrch);
1166 } else {
1167 *arg_i = 0;
1168 ret = EINVAL;
1169 }
1170 break;
1171
1172 case AIOSSIZE: /* set the current blocksize */
1173 {
1174 struct snd_size *p = (struct snd_size *)arg;
1175
1176 p->play_size = 0;
1177 p->rec_size = 0;
1178 PCM_ACQUIRE_QUICK(d);
1179 if (wrch) {
1180 CHN_LOCK(wrch);
1181 chn_setblocksize(wrch, 2, p->play_size);
1182 p->play_size = sndbuf_getblksz(wrch->bufsoft);
1183 CHN_UNLOCK(wrch);
1184 }
1185 if (rdch) {
1186 CHN_LOCK(rdch);
1187 chn_setblocksize(rdch, 2, p->rec_size);
1188 p->rec_size = sndbuf_getblksz(rdch->bufsoft);
1189 CHN_UNLOCK(rdch);
1190 }
1191 PCM_RELEASE_QUICK(d);
1192 }
1193 break;
1194 case AIOGSIZE: /* get the current blocksize */
1195 {
1196 struct snd_size *p = (struct snd_size *)arg;
1197
1198 if (wrch) {
1199 CHN_LOCK(wrch);
1200 p->play_size = sndbuf_getblksz(wrch->bufsoft);
1201 CHN_UNLOCK(wrch);
1202 }
1203 if (rdch) {
1204 CHN_LOCK(rdch);
1205 p->rec_size = sndbuf_getblksz(rdch->bufsoft);
1206 CHN_UNLOCK(rdch);
1207 }
1208 }
1209 break;
1210
1211 case AIOSFMT:
1212 case AIOGFMT:
1213 {
1214 snd_chan_param *p = (snd_chan_param *)arg;
1215
1216 if (cmd == AIOSFMT &&
1217 ((p->play_format != 0 && p->play_rate == 0) ||
1218 (p->rec_format != 0 && p->rec_rate == 0))) {
1219 ret = EINVAL;
1220 break;
1221 }
1222 PCM_ACQUIRE_QUICK(d);
1223 if (wrch) {
1224 CHN_LOCK(wrch);
1225 if (cmd == AIOSFMT && p->play_format != 0) {
1226 chn_setformat(wrch,
1227 SND_FORMAT(p->play_format,
1228 AFMT_CHANNEL(wrch->format),
1229 AFMT_EXTCHANNEL(wrch->format)));
1230 chn_setspeed(wrch, p->play_rate);
1231 }
1232 p->play_rate = wrch->speed;
1233 p->play_format = AFMT_ENCODING(wrch->format);
1234 CHN_UNLOCK(wrch);
1235 } else {
1236 p->play_rate = 0;
1237 p->play_format = 0;
1238 }
1239 if (rdch) {
1240 CHN_LOCK(rdch);
1241 if (cmd == AIOSFMT && p->rec_format != 0) {
1242 chn_setformat(rdch,
1243 SND_FORMAT(p->rec_format,
1244 AFMT_CHANNEL(rdch->format),
1245 AFMT_EXTCHANNEL(rdch->format)));
1246 chn_setspeed(rdch, p->rec_rate);
1247 }
1248 p->rec_rate = rdch->speed;
1249 p->rec_format = AFMT_ENCODING(rdch->format);
1250 CHN_UNLOCK(rdch);
1251 } else {
1252 p->rec_rate = 0;
1253 p->rec_format = 0;
1254 }
1255 PCM_RELEASE_QUICK(d);
1256 }
1257 break;
1258
1259 case AIOGCAP: /* get capabilities */
1260 {
1261 snd_capabilities *p = (snd_capabilities *)arg;
1262 struct pcmchan_caps *pcaps = NULL, *rcaps = NULL;
1263 struct cdev *pdev;
1264
1265 PCM_LOCK(d);
1266 if (rdch) {
1267 CHN_LOCK(rdch);
1268 rcaps = chn_getcaps(rdch);
1269 }
1270 if (wrch) {
1271 CHN_LOCK(wrch);
1272 pcaps = chn_getcaps(wrch);
1273 }
1274 p->rate_min = max(rcaps? rcaps->minspeed : 0,
1275 pcaps? pcaps->minspeed : 0);
1276 p->rate_max = min(rcaps? rcaps->maxspeed : 1000000,
1277 pcaps? pcaps->maxspeed : 1000000);
1278 p->bufsize = min(rdch? sndbuf_getsize(rdch->bufsoft) : 1000000,
1279 wrch? sndbuf_getsize(wrch->bufsoft) : 1000000);
1280 /* XXX bad on sb16 */
1281 p->formats = (rdch? chn_getformats(rdch) : 0xffffffff) &
1282 (wrch? chn_getformats(wrch) : 0xffffffff);
1283 if (rdch && wrch)
1284 p->formats |= (dsp_get_flags(i_dev) & SD_F_SIMPLEX)? 0 : AFMT_FULLDUPLEX;
1285 pdev = d->mixer_dev;
1286 p->mixers = 1; /* default: one mixer */
1287 p->inputs = pdev->si_drv1? mix_getdevs(pdev->si_drv1) : 0;
1288 p->left = p->right = 100;
1289 if (wrch)
1290 CHN_UNLOCK(wrch);
1291 if (rdch)
1292 CHN_UNLOCK(rdch);
1293 PCM_UNLOCK(d);
1294 }
1295 break;
1296
1297 case AIOSTOP:
1298 if (*arg_i == AIOSYNC_PLAY && wrch) {
1299 CHN_LOCK(wrch);
1300 *arg_i = chn_abort(wrch);
1301 CHN_UNLOCK(wrch);
1302 } else if (*arg_i == AIOSYNC_CAPTURE && rdch) {
1303 CHN_LOCK(rdch);
1304 *arg_i = chn_abort(rdch);
1305 CHN_UNLOCK(rdch);
1306 } else {
1307 printf("AIOSTOP: bad channel 0x%x\n", *arg_i);
1308 *arg_i = 0;
1309 }
1310 break;
1311
1312 case AIOSYNC:
1313 printf("AIOSYNC chan 0x%03lx pos %lu unimplemented\n",
1314 ((snd_sync_parm *)arg)->chan, ((snd_sync_parm *)arg)->pos);
1315 break;
1316 #endif
1317 /*
1318 * here follow the standard ioctls (filio.h etc.)
1319 */
1320 case FIONREAD: /* get # bytes to read */
1321 if (rdch) {
1322 CHN_LOCK(rdch);
1323 /* if (rdch && rdch->bufhard.dl)
1324 while (chn_rdfeed(rdch) == 0);
1325 */
1326 *arg_i = sndbuf_getready(rdch->bufsoft);
1327 CHN_UNLOCK(rdch);
1328 } else {
1329 *arg_i = 0;
1330 ret = EINVAL;
1331 }
1332 break;
1333
1334 case FIOASYNC: /*set/clear async i/o */
1335 DEB( printf("FIOASYNC\n") ; )
1336 break;
1337
1338 case SNDCTL_DSP_NONBLOCK: /* set non-blocking i/o */
1339 case FIONBIO: /* set/clear non-blocking i/o */
1340 if (rdch) {
1341 CHN_LOCK(rdch);
1342 if (cmd == SNDCTL_DSP_NONBLOCK || *arg_i)
1343 rdch->flags |= CHN_F_NBIO;
1344 else
1345 rdch->flags &= ~CHN_F_NBIO;
1346 CHN_UNLOCK(rdch);
1347 }
1348 if (wrch) {
1349 CHN_LOCK(wrch);
1350 if (cmd == SNDCTL_DSP_NONBLOCK || *arg_i)
1351 wrch->flags |= CHN_F_NBIO;
1352 else
1353 wrch->flags &= ~CHN_F_NBIO;
1354 CHN_UNLOCK(wrch);
1355 }
1356 break;
1357
1358 /*
1359 * Finally, here is the linux-compatible ioctl interface
1360 */
1361 #define THE_REAL_SNDCTL_DSP_GETBLKSIZE _IOWR('P', 4, int)
1362 case THE_REAL_SNDCTL_DSP_GETBLKSIZE:
1363 case SNDCTL_DSP_GETBLKSIZE:
1364 chn = wrch ? wrch : rdch;
1365 if (chn) {
1366 CHN_LOCK(chn);
1367 *arg_i = sndbuf_getblksz(chn->bufsoft);
1368 CHN_UNLOCK(chn);
1369 } else {
1370 *arg_i = 0;
1371 ret = EINVAL;
1372 }
1373 break;
1374
1375 case SNDCTL_DSP_SETBLKSIZE:
1376 RANGE(*arg_i, 16, 65536);
1377 PCM_ACQUIRE_QUICK(d);
1378 if (wrch) {
1379 CHN_LOCK(wrch);
1380 chn_setblocksize(wrch, 2, *arg_i);
1381 CHN_UNLOCK(wrch);
1382 }
1383 if (rdch) {
1384 CHN_LOCK(rdch);
1385 chn_setblocksize(rdch, 2, *arg_i);
1386 CHN_UNLOCK(rdch);
1387 }
1388 PCM_RELEASE_QUICK(d);
1389 break;
1390
1391 case SNDCTL_DSP_RESET:
1392 DEB(printf("dsp reset\n"));
1393 if (wrch) {
1394 CHN_LOCK(wrch);
1395 chn_abort(wrch);
1396 chn_resetbuf(wrch);
1397 CHN_UNLOCK(wrch);
1398 }
1399 if (rdch) {
1400 CHN_LOCK(rdch);
1401 chn_abort(rdch);
1402 chn_resetbuf(rdch);
1403 CHN_UNLOCK(rdch);
1404 }
1405 break;
1406
1407 case SNDCTL_DSP_SYNC:
1408 DEB(printf("dsp sync\n"));
1409 /* chn_sync may sleep */
1410 if (wrch) {
1411 CHN_LOCK(wrch);
1412 chn_sync(wrch, 0);
1413 CHN_UNLOCK(wrch);
1414 }
1415 break;
1416
1417 case SNDCTL_DSP_SPEED:
1418 /* chn_setspeed may sleep */
1419 tmp = 0;
1420 PCM_ACQUIRE_QUICK(d);
1421 if (wrch) {
1422 CHN_LOCK(wrch);
1423 ret = chn_setspeed(wrch, *arg_i);
1424 tmp = wrch->speed;
1425 CHN_UNLOCK(wrch);
1426 }
1427 if (rdch && ret == 0) {
1428 CHN_LOCK(rdch);
1429 ret = chn_setspeed(rdch, *arg_i);
1430 if (tmp == 0)
1431 tmp = rdch->speed;
1432 CHN_UNLOCK(rdch);
1433 }
1434 PCM_RELEASE_QUICK(d);
1435 *arg_i = tmp;
1436 break;
1437
1438 case SOUND_PCM_READ_RATE:
1439 chn = wrch ? wrch : rdch;
1440 if (chn) {
1441 CHN_LOCK(chn);
1442 *arg_i = chn->speed;
1443 CHN_UNLOCK(chn);
1444 } else {
1445 *arg_i = 0;
1446 ret = EINVAL;
1447 }
1448 break;
1449
1450 case SNDCTL_DSP_STEREO:
1451 tmp = -1;
1452 *arg_i = (*arg_i)? 2 : 1;
1453 PCM_ACQUIRE_QUICK(d);
1454 if (wrch) {
1455 CHN_LOCK(wrch);
1456 ret = chn_setformat(wrch,
1457 SND_FORMAT(wrch->format, *arg_i, 0));
1458 tmp = (AFMT_CHANNEL(wrch->format) > 1)? 1 : 0;
1459 CHN_UNLOCK(wrch);
1460 }
1461 if (rdch && ret == 0) {
1462 CHN_LOCK(rdch);
1463 ret = chn_setformat(rdch,
1464 SND_FORMAT(rdch->format, *arg_i, 0));
1465 if (tmp == -1)
1466 tmp = (AFMT_CHANNEL(rdch->format) > 1)? 1 : 0;
1467 CHN_UNLOCK(rdch);
1468 }
1469 PCM_RELEASE_QUICK(d);
1470 *arg_i = tmp;
1471 break;
1472
1473 case SOUND_PCM_WRITE_CHANNELS:
1474 /* case SNDCTL_DSP_CHANNELS: ( == SOUND_PCM_WRITE_CHANNELS) */
1475 if (*arg_i < 0) {
1476 *arg_i = 0;
1477 ret = EINVAL;
1478 break;
1479 }
1480 if (*arg_i != 0) {
1481 struct pcmchan_matrix *m;
1482 uint32_t ext;
1483
1484 tmp = 0;
1485 if (*arg_i > SND_CHN_MAX)
1486 *arg_i = SND_CHN_MAX;
1487
1488 m = feeder_matrix_default_channel_map(*arg_i);
1489 if (m != NULL)
1490 ext = m->ext;
1491 else
1492 ext = 0;
1493
1494 PCM_ACQUIRE_QUICK(d);
1495 if (wrch) {
1496 CHN_LOCK(wrch);
1497 ret = chn_setformat(wrch,
1498 SND_FORMAT(wrch->format, *arg_i, ext));
1499 tmp = AFMT_CHANNEL(wrch->format);
1500 CHN_UNLOCK(wrch);
1501 }
1502 if (rdch && ret == 0) {
1503 CHN_LOCK(rdch);
1504 ret = chn_setformat(rdch,
1505 SND_FORMAT(rdch->format, *arg_i, ext));
1506 if (tmp == 0)
1507 tmp = AFMT_CHANNEL(rdch->format);
1508 CHN_UNLOCK(rdch);
1509 }
1510 PCM_RELEASE_QUICK(d);
1511 *arg_i = tmp;
1512 } else {
1513 chn = wrch ? wrch : rdch;
1514 CHN_LOCK(chn);
1515 *arg_i = AFMT_CHANNEL(chn->format);
1516 CHN_UNLOCK(chn);
1517 }
1518 break;
1519
1520 case SOUND_PCM_READ_CHANNELS:
1521 chn = wrch ? wrch : rdch;
1522 if (chn) {
1523 CHN_LOCK(chn);
1524 *arg_i = AFMT_CHANNEL(chn->format);
1525 CHN_UNLOCK(chn);
1526 } else {
1527 *arg_i = 0;
1528 ret = EINVAL;
1529 }
1530 break;
1531
1532 case SNDCTL_DSP_GETFMTS: /* returns a mask of supported fmts */
1533 chn = wrch ? wrch : rdch;
1534 if (chn) {
1535 CHN_LOCK(chn);
1536 *arg_i = chn_getformats(chn);
1537 CHN_UNLOCK(chn);
1538 } else {
1539 *arg_i = 0;
1540 ret = EINVAL;
1541 }
1542 break;
1543
1544 case SNDCTL_DSP_SETFMT: /* sets _one_ format */
1545 if (*arg_i != AFMT_QUERY) {
1546 tmp = 0;
1547 PCM_ACQUIRE_QUICK(d);
1548 if (wrch) {
1549 CHN_LOCK(wrch);
1550 ret = chn_setformat(wrch, SND_FORMAT(*arg_i,
1551 AFMT_CHANNEL(wrch->format),
1552 AFMT_EXTCHANNEL(wrch->format)));
1553 tmp = wrch->format;
1554 CHN_UNLOCK(wrch);
1555 }
1556 if (rdch && ret == 0) {
1557 CHN_LOCK(rdch);
1558 ret = chn_setformat(rdch, SND_FORMAT(*arg_i,
1559 AFMT_CHANNEL(rdch->format),
1560 AFMT_EXTCHANNEL(rdch->format)));
1561 if (tmp == 0)
1562 tmp = rdch->format;
1563 CHN_UNLOCK(rdch);
1564 }
1565 PCM_RELEASE_QUICK(d);
1566 *arg_i = AFMT_ENCODING(tmp);
1567 } else {
1568 chn = wrch ? wrch : rdch;
1569 CHN_LOCK(chn);
1570 *arg_i = AFMT_ENCODING(chn->format);
1571 CHN_UNLOCK(chn);
1572 }
1573 break;
1574
1575 case SNDCTL_DSP_SETFRAGMENT:
1576 DEB(printf("SNDCTL_DSP_SETFRAGMENT 0x%08x\n", *(int *)arg));
1577 {
1578 uint32_t fragln = (*arg_i) & 0x0000ffff;
1579 uint32_t maxfrags = ((*arg_i) & 0xffff0000) >> 16;
1580 uint32_t fragsz;
1581 uint32_t r_maxfrags, r_fragsz;
1582
1583 RANGE(fragln, 4, 16);
1584 fragsz = 1 << fragln;
1585
1586 if (maxfrags == 0)
1587 maxfrags = CHN_2NDBUFMAXSIZE / fragsz;
1588 if (maxfrags < 2)
1589 maxfrags = 2;
1590 if (maxfrags * fragsz > CHN_2NDBUFMAXSIZE)
1591 maxfrags = CHN_2NDBUFMAXSIZE / fragsz;
1592
1593 DEB(printf("SNDCTL_DSP_SETFRAGMENT %d frags, %d sz\n", maxfrags, fragsz));
1594 PCM_ACQUIRE_QUICK(d);
1595 if (rdch) {
1596 CHN_LOCK(rdch);
1597 ret = chn_setblocksize(rdch, maxfrags, fragsz);
1598 r_maxfrags = sndbuf_getblkcnt(rdch->bufsoft);
1599 r_fragsz = sndbuf_getblksz(rdch->bufsoft);
1600 CHN_UNLOCK(rdch);
1601 } else {
1602 r_maxfrags = maxfrags;
1603 r_fragsz = fragsz;
1604 }
1605 if (wrch && ret == 0) {
1606 CHN_LOCK(wrch);
1607 ret = chn_setblocksize(wrch, maxfrags, fragsz);
1608 maxfrags = sndbuf_getblkcnt(wrch->bufsoft);
1609 fragsz = sndbuf_getblksz(wrch->bufsoft);
1610 CHN_UNLOCK(wrch);
1611 } else { /* use whatever came from the read channel */
1612 maxfrags = r_maxfrags;
1613 fragsz = r_fragsz;
1614 }
1615 PCM_RELEASE_QUICK(d);
1616
1617 fragln = 0;
1618 while (fragsz > 1) {
1619 fragln++;
1620 fragsz >>= 1;
1621 }
1622 *arg_i = (maxfrags << 16) | fragln;
1623 }
1624 break;
1625
1626 case SNDCTL_DSP_GETISPACE:
1627 /* return the size of data available in the input queue */
1628 {
1629 audio_buf_info *a = (audio_buf_info *)arg;
1630 if (rdch) {
1631 struct snd_dbuf *bs = rdch->bufsoft;
1632
1633 CHN_LOCK(rdch);
1634 a->bytes = sndbuf_getready(bs);
1635 a->fragments = a->bytes / sndbuf_getblksz(bs);
1636 a->fragstotal = sndbuf_getblkcnt(bs);
1637 a->fragsize = sndbuf_getblksz(bs);
1638 CHN_UNLOCK(rdch);
1639 } else
1640 ret = EINVAL;
1641 }
1642 break;
1643
1644 case SNDCTL_DSP_GETOSPACE:
1645 /* return space available in the output queue */
1646 {
1647 audio_buf_info *a = (audio_buf_info *)arg;
1648 if (wrch) {
1649 struct snd_dbuf *bs = wrch->bufsoft;
1650
1651 CHN_LOCK(wrch);
1652 /* XXX abusive DMA update: chn_wrupdate(wrch); */
1653 a->bytes = sndbuf_getfree(bs);
1654 a->fragments = a->bytes / sndbuf_getblksz(bs);
1655 a->fragstotal = sndbuf_getblkcnt(bs);
1656 a->fragsize = sndbuf_getblksz(bs);
1657 CHN_UNLOCK(wrch);
1658 } else
1659 ret = EINVAL;
1660 }
1661 break;
1662
1663 case SNDCTL_DSP_GETIPTR:
1664 {
1665 count_info *a = (count_info *)arg;
1666 if (rdch) {
1667 struct snd_dbuf *bs = rdch->bufsoft;
1668
1669 CHN_LOCK(rdch);
1670 /* XXX abusive DMA update: chn_rdupdate(rdch); */
1671 a->bytes = sndbuf_gettotal(bs);
1672 a->blocks = sndbuf_getblocks(bs) - rdch->blocks;
1673 a->ptr = sndbuf_getfreeptr(bs);
1674 rdch->blocks = sndbuf_getblocks(bs);
1675 CHN_UNLOCK(rdch);
1676 } else
1677 ret = EINVAL;
1678 }
1679 break;
1680
1681 case SNDCTL_DSP_GETOPTR:
1682 {
1683 count_info *a = (count_info *)arg;
1684 if (wrch) {
1685 struct snd_dbuf *bs = wrch->bufsoft;
1686
1687 CHN_LOCK(wrch);
1688 /* XXX abusive DMA update: chn_wrupdate(wrch); */
1689 a->bytes = sndbuf_gettotal(bs);
1690 a->blocks = sndbuf_getblocks(bs) - wrch->blocks;
1691 a->ptr = sndbuf_getreadyptr(bs);
1692 wrch->blocks = sndbuf_getblocks(bs);
1693 CHN_UNLOCK(wrch);
1694 } else
1695 ret = EINVAL;
1696 }
1697 break;
1698
1699 case SNDCTL_DSP_GETCAPS:
1700 PCM_LOCK(d);
1701 *arg_i = PCM_CAP_REALTIME | PCM_CAP_MMAP | PCM_CAP_TRIGGER;
1702 if (rdch && wrch && !(dsp_get_flags(i_dev) & SD_F_SIMPLEX))
1703 *arg_i |= PCM_CAP_DUPLEX;
1704 PCM_UNLOCK(d);
1705 break;
1706
1707 case SOUND_PCM_READ_BITS:
1708 chn = wrch ? wrch : rdch;
1709 if (chn) {
1710 CHN_LOCK(chn);
1711 if (chn->format & AFMT_8BIT)
1712 *arg_i = 8;
1713 else if (chn->format & AFMT_16BIT)
1714 *arg_i = 16;
1715 else if (chn->format & AFMT_24BIT)
1716 *arg_i = 24;
1717 else if (chn->format & AFMT_32BIT)
1718 *arg_i = 32;
1719 else
1720 ret = EINVAL;
1721 CHN_UNLOCK(chn);
1722 } else {
1723 *arg_i = 0;
1724 ret = EINVAL;
1725 }
1726 break;
1727
1728 case SNDCTL_DSP_SETTRIGGER:
1729 if (rdch) {
1730 CHN_LOCK(rdch);
1731 rdch->flags &= ~CHN_F_NOTRIGGER;
1732 if (*arg_i & PCM_ENABLE_INPUT)
1733 chn_start(rdch, 1);
1734 else {
1735 chn_abort(rdch);
1736 chn_resetbuf(rdch);
1737 rdch->flags |= CHN_F_NOTRIGGER;
1738 }
1739 CHN_UNLOCK(rdch);
1740 }
1741 if (wrch) {
1742 CHN_LOCK(wrch);
1743 wrch->flags &= ~CHN_F_NOTRIGGER;
1744 if (*arg_i & PCM_ENABLE_OUTPUT)
1745 chn_start(wrch, 1);
1746 else {
1747 chn_abort(wrch);
1748 chn_resetbuf(wrch);
1749 wrch->flags |= CHN_F_NOTRIGGER;
1750 }
1751 CHN_UNLOCK(wrch);
1752 }
1753 break;
1754
1755 case SNDCTL_DSP_GETTRIGGER:
1756 *arg_i = 0;
1757 if (wrch) {
1758 CHN_LOCK(wrch);
1759 if (wrch->flags & CHN_F_TRIGGERED)
1760 *arg_i |= PCM_ENABLE_OUTPUT;
1761 CHN_UNLOCK(wrch);
1762 }
1763 if (rdch) {
1764 CHN_LOCK(rdch);
1765 if (rdch->flags & CHN_F_TRIGGERED)
1766 *arg_i |= PCM_ENABLE_INPUT;
1767 CHN_UNLOCK(rdch);
1768 }
1769 break;
1770
1771 case SNDCTL_DSP_GETODELAY:
1772 if (wrch) {
1773 struct snd_dbuf *bs = wrch->bufsoft;
1774
1775 CHN_LOCK(wrch);
1776 /* XXX abusive DMA update: chn_wrupdate(wrch); */
1777 *arg_i = sndbuf_getready(bs);
1778 CHN_UNLOCK(wrch);
1779 } else
1780 ret = EINVAL;
1781 break;
1782
1783 case SNDCTL_DSP_POST:
1784 if (wrch) {
1785 CHN_LOCK(wrch);
1786 wrch->flags &= ~CHN_F_NOTRIGGER;
1787 chn_start(wrch, 1);
1788 CHN_UNLOCK(wrch);
1789 }
1790 break;
1791
1792 case SNDCTL_DSP_SETDUPLEX:
1793 /*
1794 * switch to full-duplex mode if card is in half-duplex
1795 * mode and is able to work in full-duplex mode
1796 */
1797 PCM_LOCK(d);
1798 if (rdch && wrch && (dsp_get_flags(i_dev) & SD_F_SIMPLEX))
1799 dsp_set_flags(i_dev, dsp_get_flags(i_dev)^SD_F_SIMPLEX);
1800 PCM_UNLOCK(d);
1801 break;
1802
1803 /*
1804 * The following four ioctls are simple wrappers around mixer_ioctl
1805 * with no further processing. xcmd is short for "translated
1806 * command".
1807 */
1808 case SNDCTL_DSP_GETRECVOL:
1809 if (xcmd == 0) {
1810 xcmd = SOUND_MIXER_READ_RECLEV;
1811 chn = rdch;
1812 }
1813 /* FALLTHROUGH */
1814 case SNDCTL_DSP_SETRECVOL:
1815 if (xcmd == 0) {
1816 xcmd = SOUND_MIXER_WRITE_RECLEV;
1817 chn = rdch;
1818 }
1819 /* FALLTHROUGH */
1820 case SNDCTL_DSP_GETPLAYVOL:
1821 if (xcmd == 0) {
1822 xcmd = SOUND_MIXER_READ_PCM;
1823 chn = wrch;
1824 }
1825 /* FALLTHROUGH */
1826 case SNDCTL_DSP_SETPLAYVOL:
1827 if (xcmd == 0) {
1828 xcmd = SOUND_MIXER_WRITE_PCM;
1829 chn = wrch;
1830 }
1831
1832 ret = dsp_ioctl_channel(i_dev, chn, xcmd, arg);
1833 if (ret != -1) {
1834 PCM_GIANT_EXIT(d);
1835 return (ret);
1836 }
1837
1838 if (d->mixer_dev != NULL) {
1839 PCM_ACQUIRE_QUICK(d);
1840 ret = mixer_ioctl_cmd(d->mixer_dev, xcmd, arg, -1, td,
1841 MIXER_CMD_DIRECT);
1842 PCM_RELEASE_QUICK(d);
1843 } else
1844 ret = ENOTSUP;
1845
1846 break;
1847
1848 case SNDCTL_DSP_GET_RECSRC_NAMES:
1849 case SNDCTL_DSP_GET_RECSRC:
1850 case SNDCTL_DSP_SET_RECSRC:
1851 if (d->mixer_dev != NULL) {
1852 PCM_ACQUIRE_QUICK(d);
1853 ret = mixer_ioctl_cmd(d->mixer_dev, cmd, arg, -1, td,
1854 MIXER_CMD_DIRECT);
1855 PCM_RELEASE_QUICK(d);
1856 } else
1857 ret = ENOTSUP;
1858 break;
1859
1860 /*
1861 * The following 3 ioctls aren't very useful at the moment. For
1862 * now, only a single channel is associated with a cdev (/dev/dspN
1863 * instance), so there's only a single output routing to use (i.e.,
1864 * the wrch bound to this cdev).
1865 */
1866 case SNDCTL_DSP_GET_PLAYTGT_NAMES:
1867 {
1868 oss_mixer_enuminfo *ei;
1869 ei = (oss_mixer_enuminfo *)arg;
1870 ei->dev = 0;
1871 ei->ctrl = 0;
1872 ei->version = 0; /* static for now */
1873 ei->strindex[0] = 0;
1874
1875 if (wrch != NULL) {
1876 ei->nvalues = 1;
1877 strlcpy(ei->strings, wrch->name,
1878 sizeof(ei->strings));
1879 } else {
1880 ei->nvalues = 0;
1881 ei->strings[0] = '\0';
1882 }
1883 }
1884 break;
1885 case SNDCTL_DSP_GET_PLAYTGT:
1886 case SNDCTL_DSP_SET_PLAYTGT: /* yes, they are the same for now */
1887 /*
1888 * Re: SET_PLAYTGT
1889 * OSSv4: "The value that was accepted by the device will
1890 * be returned back in the variable pointed by the
1891 * argument."
1892 */
1893 if (wrch != NULL)
1894 *arg_i = 0;
1895 else
1896 ret = EINVAL;
1897 break;
1898
1899 case SNDCTL_DSP_SILENCE:
1900 /*
1901 * Flush the software (pre-feed) buffer, but try to minimize playback
1902 * interruption. (I.e., record unplayed samples with intent to
1903 * restore by SNDCTL_DSP_SKIP.) Intended for application "pause"
1904 * functionality.
1905 */
1906 if (wrch == NULL)
1907 ret = EINVAL;
1908 else {
1909 struct snd_dbuf *bs;
1910 CHN_LOCK(wrch);
1911 while (wrch->inprog != 0)
1912 cv_wait(&wrch->cv, wrch->lock);
1913 bs = wrch->bufsoft;
1914 if ((bs->shadbuf != NULL) && (sndbuf_getready(bs) > 0)) {
1915 bs->sl = sndbuf_getready(bs);
1916 sndbuf_dispose(bs, bs->shadbuf, sndbuf_getready(bs));
1917 sndbuf_fillsilence(bs);
1918 chn_start(wrch, 0);
1919 }
1920 CHN_UNLOCK(wrch);
1921 }
1922 break;
1923
1924 case SNDCTL_DSP_SKIP:
1925 /*
1926 * OSSv4 docs: "This ioctl call discards all unplayed samples in the
1927 * playback buffer by moving the current write position immediately
1928 * before the point where the device is currently reading the samples."
1929 */
1930 if (wrch == NULL)
1931 ret = EINVAL;
1932 else {
1933 struct snd_dbuf *bs;
1934 CHN_LOCK(wrch);
1935 while (wrch->inprog != 0)
1936 cv_wait(&wrch->cv, wrch->lock);
1937 bs = wrch->bufsoft;
1938 if ((bs->shadbuf != NULL) && (bs->sl > 0)) {
1939 sndbuf_softreset(bs);
1940 sndbuf_acquire(bs, bs->shadbuf, bs->sl);
1941 bs->sl = 0;
1942 chn_start(wrch, 0);
1943 }
1944 CHN_UNLOCK(wrch);
1945 }
1946 break;
1947
1948 case SNDCTL_DSP_CURRENT_OPTR:
1949 case SNDCTL_DSP_CURRENT_IPTR:
1950 /**
1951 * @note Changing formats resets the buffer counters, which differs
1952 * from the 4Front drivers. However, I don't expect this to be
1953 * much of a problem.
1954 *
1955 * @note In a test where @c CURRENT_OPTR is called immediately after write
1956 * returns, this driver is about 32K samples behind whereas
1957 * 4Front's is about 8K samples behind. Should determine source
1958 * of discrepancy, even if only out of curiosity.
1959 *
1960 * @todo Actually test SNDCTL_DSP_CURRENT_IPTR.
1961 */
1962 chn = (cmd == SNDCTL_DSP_CURRENT_OPTR) ? wrch : rdch;
1963 if (chn == NULL)
1964 ret = EINVAL;
1965 else {
1966 struct snd_dbuf *bs;
1967 /* int tmp; */
1968
1969 oss_count_t *oc = (oss_count_t *)arg;
1970
1971 CHN_LOCK(chn);
1972 bs = chn->bufsoft;
1973 #if 0
1974 tmp = (sndbuf_getsize(b) + chn_getptr(chn) - sndbuf_gethwptr(b)) % sndbuf_getsize(b);
1975 oc->samples = (sndbuf_gettotal(b) + tmp) / sndbuf_getalign(b);
1976 oc->fifo_samples = (sndbuf_getready(b) - tmp) / sndbuf_getalign(b);
1977 #else
1978 oc->samples = sndbuf_gettotal(bs) / sndbuf_getalign(bs);
1979 oc->fifo_samples = sndbuf_getready(bs) / sndbuf_getalign(bs);
1980 #endif
1981 CHN_UNLOCK(chn);
1982 }
1983 break;
1984
1985 case SNDCTL_DSP_HALT_OUTPUT:
1986 case SNDCTL_DSP_HALT_INPUT:
1987 chn = (cmd == SNDCTL_DSP_HALT_OUTPUT) ? wrch : rdch;
1988 if (chn == NULL)
1989 ret = EINVAL;
1990 else {
1991 CHN_LOCK(chn);
1992 chn_abort(chn);
1993 CHN_UNLOCK(chn);
1994 }
1995 break;
1996
1997 case SNDCTL_DSP_LOW_WATER:
1998 /*
1999 * Set the number of bytes required to attract attention by
2000 * select/poll.
2001 */
2002 if (wrch != NULL) {
2003 CHN_LOCK(wrch);
2004 wrch->lw = (*arg_i > 1) ? *arg_i : 1;
2005 CHN_UNLOCK(wrch);
2006 }
2007 if (rdch != NULL) {
2008 CHN_LOCK(rdch);
2009 rdch->lw = (*arg_i > 1) ? *arg_i : 1;
2010 CHN_UNLOCK(rdch);
2011 }
2012 break;
2013
2014 case SNDCTL_DSP_GETERROR:
2015 /*
2016 * OSSv4 docs: "All errors and counters will automatically be
2017 * cleared to zeroes after the call so each call will return only
2018 * the errors that occurred after the previous invocation. ... The
2019 * play_underruns and rec_overrun fields are the only useful fields
2020 * returned by OSS 4.0."
2021 */
2022 {
2023 audio_errinfo *ei = (audio_errinfo *)arg;
2024
2025 bzero((void *)ei, sizeof(*ei));
2026
2027 if (wrch != NULL) {
2028 CHN_LOCK(wrch);
2029 ei->play_underruns = wrch->xruns;
2030 wrch->xruns = 0;
2031 CHN_UNLOCK(wrch);
2032 }
2033 if (rdch != NULL) {
2034 CHN_LOCK(rdch);
2035 ei->rec_overruns = rdch->xruns;
2036 rdch->xruns = 0;
2037 CHN_UNLOCK(rdch);
2038 }
2039 }
2040 break;
2041
2042 case SNDCTL_DSP_SYNCGROUP:
2043 PCM_ACQUIRE_QUICK(d);
2044 ret = dsp_oss_syncgroup(wrch, rdch, (oss_syncgroup *)arg);
2045 PCM_RELEASE_QUICK(d);
2046 break;
2047
2048 case SNDCTL_DSP_SYNCSTART:
2049 PCM_ACQUIRE_QUICK(d);
2050 ret = dsp_oss_syncstart(*arg_i);
2051 PCM_RELEASE_QUICK(d);
2052 break;
2053
2054 case SNDCTL_DSP_POLICY:
2055 PCM_ACQUIRE_QUICK(d);
2056 ret = dsp_oss_policy(wrch, rdch, *arg_i);
2057 PCM_RELEASE_QUICK(d);
2058 break;
2059
2060 case SNDCTL_DSP_COOKEDMODE:
2061 PCM_ACQUIRE_QUICK(d);
2062 if (!(dsp_get_flags(i_dev) & SD_F_BITPERFECT))
2063 ret = dsp_oss_cookedmode(wrch, rdch, *arg_i);
2064 PCM_RELEASE_QUICK(d);
2065 break;
2066 case SNDCTL_DSP_GET_CHNORDER:
2067 PCM_ACQUIRE_QUICK(d);
2068 ret = dsp_oss_getchnorder(wrch, rdch, (unsigned long long *)arg);
2069 PCM_RELEASE_QUICK(d);
2070 break;
2071 case SNDCTL_DSP_SET_CHNORDER:
2072 PCM_ACQUIRE_QUICK(d);
2073 ret = dsp_oss_setchnorder(wrch, rdch, (unsigned long long *)arg);
2074 PCM_RELEASE_QUICK(d);
2075 break;
2076 case SNDCTL_DSP_GETCHANNELMASK: /* XXX vlc */
2077 PCM_ACQUIRE_QUICK(d);
2078 ret = dsp_oss_getchannelmask(wrch, rdch, (int *)arg);
2079 PCM_RELEASE_QUICK(d);
2080 break;
2081 case SNDCTL_DSP_BIND_CHANNEL: /* XXX what?!? */
2082 ret = EINVAL;
2083 break;
2084 #ifdef OSSV4_EXPERIMENT
2085 /*
2086 * XXX The following ioctls are not yet supported and just return
2087 * EINVAL.
2088 */
2089 case SNDCTL_DSP_GETOPEAKS:
2090 case SNDCTL_DSP_GETIPEAKS:
2091 chn = (cmd == SNDCTL_DSP_GETOPEAKS) ? wrch : rdch;
2092 if (chn == NULL)
2093 ret = EINVAL;
2094 else {
2095 oss_peaks_t *op = (oss_peaks_t *)arg;
2096 int lpeak, rpeak;
2097
2098 CHN_LOCK(chn);
2099 ret = chn_getpeaks(chn, &lpeak, &rpeak);
2100 if (ret == -1)
2101 ret = EINVAL;
2102 else {
2103 (*op)[0] = lpeak;
2104 (*op)[1] = rpeak;
2105 }
2106 CHN_UNLOCK(chn);
2107 }
2108 break;
2109
2110 /*
2111 * XXX Once implemented, revisit this for proper cv protection
2112 * (if necessary).
2113 */
2114 case SNDCTL_GETLABEL:
2115 ret = dsp_oss_getlabel(wrch, rdch, (oss_label_t *)arg);
2116 break;
2117 case SNDCTL_SETLABEL:
2118 ret = dsp_oss_setlabel(wrch, rdch, (oss_label_t *)arg);
2119 break;
2120 case SNDCTL_GETSONG:
2121 ret = dsp_oss_getsong(wrch, rdch, (oss_longname_t *)arg);
2122 break;
2123 case SNDCTL_SETSONG:
2124 ret = dsp_oss_setsong(wrch, rdch, (oss_longname_t *)arg);
2125 break;
2126 case SNDCTL_SETNAME:
2127 ret = dsp_oss_setname(wrch, rdch, (oss_longname_t *)arg);
2128 break;
2129 #if 0
2130 /**
2131 * @note The S/PDIF interface ioctls, @c SNDCTL_DSP_READCTL and
2132 * @c SNDCTL_DSP_WRITECTL have been omitted at the suggestion of
2133 * 4Front Technologies.
2134 */
2135 case SNDCTL_DSP_READCTL:
2136 case SNDCTL_DSP_WRITECTL:
2137 ret = EINVAL;
2138 break;
2139 #endif /* !0 (explicitly omitted ioctls) */
2140
2141 #endif /* !OSSV4_EXPERIMENT */
2142 case SNDCTL_DSP_MAPINBUF:
2143 case SNDCTL_DSP_MAPOUTBUF:
2144 case SNDCTL_DSP_SETSYNCRO:
2145 /* undocumented */
2146
2147 case SNDCTL_DSP_SUBDIVIDE:
2148 case SOUND_PCM_WRITE_FILTER:
2149 case SOUND_PCM_READ_FILTER:
2150 /* dunno what these do, don't sound important */
2151
2152 default:
2153 DEB(printf("default ioctl fn 0x%08lx fail\n", cmd));
2154 ret = EINVAL;
2155 break;
2156 }
2157
2158 PCM_GIANT_LEAVE(d);
2159
2160 return (ret);
2161 }
2162
2163 static int
2164 dsp_poll(struct cdev *i_dev, int events, struct thread *td)
2165 {
2166 struct snddev_info *d;
2167 struct pcm_channel *wrch, *rdch;
2168 int ret, e;
2169
2170 d = dsp_get_info(i_dev);
2171 if (!DSP_REGISTERED(d, i_dev))
2172 return (EBADF);
2173
2174 PCM_GIANT_ENTER(d);
2175
2176 wrch = NULL;
2177 rdch = NULL;
2178 ret = 0;
2179
2180 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
2181
2182 if (wrch != NULL && !(wrch->flags & CHN_F_DEAD)) {
2183 e = (events & (POLLOUT | POLLWRNORM));
2184 if (e)
2185 ret |= chn_poll(wrch, e, td);
2186 }
2187
2188 if (rdch != NULL && !(rdch->flags & CHN_F_DEAD)) {
2189 e = (events & (POLLIN | POLLRDNORM));
2190 if (e)
2191 ret |= chn_poll(rdch, e, td);
2192 }
2193
2194 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
2195
2196 PCM_GIANT_LEAVE(d);
2197
2198 return (ret);
2199 }
2200
2201 static int
2202 dsp_mmap(struct cdev *i_dev, vm_ooffset_t offset, vm_paddr_t *paddr,
2203 int nprot, vm_memattr_t *memattr)
2204 {
2205
2206 /* XXX memattr is not honored */
2207 *paddr = vtophys(offset);
2208 return (0);
2209 }
2210
2211 static int
2212 dsp_mmap_single(struct cdev *i_dev, vm_ooffset_t *offset,
2213 vm_size_t size, struct vm_object **object, int nprot)
2214 {
2215 struct snddev_info *d;
2216 struct pcm_channel *wrch, *rdch, *c;
2217
2218 /*
2219 * Reject PROT_EXEC by default. It just doesn't makes sense.
2220 * Unfortunately, we have to give up this one due to linux_mmap
2221 * changes.
2222 *
2223 * http://lists.freebsd.org/pipermail/freebsd-emulation/2007-June/003698.html
2224 *
2225 */
2226 #ifdef SV_ABI_LINUX
2227 if ((nprot & PROT_EXEC) && (dsp_mmap_allow_prot_exec < 0 ||
2228 (dsp_mmap_allow_prot_exec == 0 &&
2229 SV_CURPROC_ABI() != SV_ABI_LINUX)))
2230 #else
2231 if ((nprot & PROT_EXEC) && dsp_mmap_allow_prot_exec < 1)
2232 #endif
2233 return (EINVAL);
2234
2235 /*
2236 * PROT_READ (alone) selects the input buffer.
2237 * PROT_WRITE (alone) selects the output buffer.
2238 * PROT_WRITE|PROT_READ together select the output buffer.
2239 */
2240 if ((nprot & (PROT_READ | PROT_WRITE)) == 0)
2241 return (EINVAL);
2242
2243 d = dsp_get_info(i_dev);
2244 if (!DSP_REGISTERED(d, i_dev))
2245 return (EINVAL);
2246
2247 PCM_GIANT_ENTER(d);
2248
2249 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
2250
2251 c = ((nprot & PROT_WRITE) != 0) ? wrch : rdch;
2252 if (c == NULL || (c->flags & CHN_F_MMAP_INVALID) ||
2253 (*offset + size) > sndbuf_getsize(c->bufsoft) ||
2254 (wrch != NULL && (wrch->flags & CHN_F_MMAP_INVALID)) ||
2255 (rdch != NULL && (rdch->flags & CHN_F_MMAP_INVALID))) {
2256 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
2257 PCM_GIANT_EXIT(d);
2258 return (EINVAL);
2259 }
2260
2261 if (wrch != NULL)
2262 wrch->flags |= CHN_F_MMAP;
2263 if (rdch != NULL)
2264 rdch->flags |= CHN_F_MMAP;
2265
2266 *offset = (uintptr_t)sndbuf_getbufofs(c->bufsoft, *offset);
2267 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
2268 *object = vm_pager_allocate(OBJT_DEVICE, i_dev,
2269 size, nprot, *offset, curthread->td_ucred);
2270
2271 PCM_GIANT_LEAVE(d);
2272
2273 if (*object == NULL)
2274 return (EINVAL);
2275 return (0);
2276 }
2277
2278 /* So much for dev_stdclone() */
2279 static int
2280 dsp_stdclone(char *name, char *namep, char *sep, int use_sep, int *u, int *c)
2281 {
2282 size_t len;
2283
2284 len = strlen(namep);
2285
2286 if (bcmp(name, namep, len) != 0)
2287 return (ENODEV);
2288
2289 name += len;
2290
2291 if (isdigit(*name) == 0)
2292 return (ENODEV);
2293
2294 len = strlen(sep);
2295
2296 if (*name == '' && !(name[1] == '\0' || bcmp(name + 1, sep, len) == 0))
2297 return (ENODEV);
2298
2299 for (*u = 0; isdigit(*name) != 0; name++) {
2300 *u *= 10;
2301 *u += *name - '';
2302 if (*u > dsp_umax)
2303 return (ENODEV);
2304 }
2305
2306 if (*name == '\0')
2307 return ((use_sep == 0) ? 0 : ENODEV);
2308
2309 if (bcmp(name, sep, len) != 0 || isdigit(name[len]) == 0)
2310 return (ENODEV);
2311
2312 name += len;
2313
2314 if (*name == '' && name[1] != '\0')
2315 return (ENODEV);
2316
2317 for (*c = 0; isdigit(*name) != 0; name++) {
2318 *c *= 10;
2319 *c += *name - '';
2320 if (*c > dsp_cmax)
2321 return (ENODEV);
2322 }
2323
2324 if (*name != '\0')
2325 return (ENODEV);
2326
2327 return (0);
2328 }
2329
2330 static void
2331 dsp_clone(void *arg,
2332 struct ucred *cred,
2333 char *name, int namelen, struct cdev **dev)
2334 {
2335 struct snddev_info *d;
2336 struct snd_clone_entry *ce;
2337 struct pcm_channel *c;
2338 int i, unit, udcmask, cunit, devtype, devhw, devcmax, tumax;
2339 char *devname, *devcmp, *devsep;
2340
2341 KASSERT(dsp_umax >= 0 && dsp_cmax >= 0, ("Uninitialized unit!"));
2342
2343 if (*dev != NULL)
2344 return;
2345
2346 unit = -1;
2347 cunit = -1;
2348 devtype = -1;
2349 devhw = 0;
2350 devcmax = -1;
2351 tumax = -1;
2352 devname = NULL;
2353 devsep = NULL;
2354
2355 for (i = 0; unit == -1 &&
2356 i < (sizeof(dsp_cdevs) / sizeof(dsp_cdevs[0])); i++) {
2357 devtype = dsp_cdevs[i].type;
2358 devcmp = dsp_cdevs[i].name;
2359 devsep = dsp_cdevs[i].sep;
2360 devname = dsp_cdevs[i].alias;
2361 if (devname == NULL)
2362 devname = devcmp;
2363 devhw = dsp_cdevs[i].hw;
2364 devcmax = dsp_cdevs[i].max - 1;
2365 if (strcmp(name, devcmp) == 0) {
2366 if (dsp_basename_clone != 0)
2367 unit = snd_unit;
2368 } else if (dsp_stdclone(name, devcmp, devsep,
2369 dsp_cdevs[i].use_sep, &unit, &cunit) != 0) {
2370 unit = -1;
2371 cunit = -1;
2372 }
2373 }
2374
2375 d = devclass_get_softc(pcm_devclass, unit);
2376 if (!PCM_REGISTERED(d) || d->clones == NULL)
2377 return;
2378
2379 /* XXX Need Giant magic entry ??? */
2380
2381 PCM_LOCK(d);
2382 if (snd_clone_disabled(d->clones)) {
2383 PCM_UNLOCK(d);
2384 return;
2385 }
2386
2387 PCM_WAIT(d);
2388 PCM_ACQUIRE(d);
2389 PCM_UNLOCK(d);
2390
2391 udcmask = snd_u2unit(unit) | snd_d2unit(devtype);
2392
2393 if (devhw != 0) {
2394 KASSERT(devcmax <= dsp_cmax,
2395 ("overflow: devcmax=%d, dsp_cmax=%d", devcmax, dsp_cmax));
2396 if (cunit > devcmax) {
2397 PCM_RELEASE_QUICK(d);
2398 return;
2399 }
2400 udcmask |= snd_c2unit(cunit);
2401 CHN_FOREACH(c, d, channels.pcm) {
2402 CHN_LOCK(c);
2403 if (c->unit != udcmask) {
2404 CHN_UNLOCK(c);
2405 continue;
2406 }
2407 CHN_UNLOCK(c);
2408 udcmask &= ~snd_c2unit(cunit);
2409 /*
2410 * Temporarily increase clone maxunit to overcome
2411 * vchan flexibility.
2412 *
2413 * # sysctl dev.pcm.0.play.vchans=256
2414 * dev.pcm.0.play.vchans: 1 -> 256
2415 * # cat /dev/zero > /dev/dsp0.vp255 &
2416 * [1] 17296
2417 * # sysctl dev.pcm.0.play.vchans=0
2418 * dev.pcm.0.play.vchans: 256 -> 1
2419 * # fg
2420 * [1] + running cat /dev/zero > /dev/dsp0.vp255
2421 * ^C
2422 * # cat /dev/zero > /dev/dsp0.vp255
2423 * zsh: operation not supported: /dev/dsp0.vp255
2424 */
2425 tumax = snd_clone_getmaxunit(d->clones);
2426 if (cunit > tumax)
2427 snd_clone_setmaxunit(d->clones, cunit);
2428 else
2429 tumax = -1;
2430 goto dsp_clone_alloc;
2431 }
2432 /*
2433 * Ok, so we're requesting unallocated vchan, but still
2434 * within maximum vchan limit.
2435 */
2436 if (((devtype == SND_DEV_DSPHW_VPLAY && d->pvchancount > 0) ||
2437 (devtype == SND_DEV_DSPHW_VREC && d->rvchancount > 0)) &&
2438 cunit < snd_maxautovchans) {
2439 udcmask &= ~snd_c2unit(cunit);
2440 tumax = snd_clone_getmaxunit(d->clones);
2441 if (cunit > tumax)
2442 snd_clone_setmaxunit(d->clones, cunit);
2443 else
2444 tumax = -1;
2445 goto dsp_clone_alloc;
2446 }
2447 PCM_RELEASE_QUICK(d);
2448 return;
2449 }
2450
2451 dsp_clone_alloc:
2452 ce = snd_clone_alloc(d->clones, dev, &cunit, udcmask);
2453 if (tumax != -1)
2454 snd_clone_setmaxunit(d->clones, tumax);
2455 if (ce != NULL) {
2456 udcmask |= snd_c2unit(cunit);
2457 *dev = make_dev(&dsp_cdevsw, PCMMINOR(udcmask),
2458 UID_ROOT, GID_WHEEL, 0666, "%s%d%s%d",
2459 devname, unit, devsep, cunit);
2460 snd_clone_register(ce, *dev);
2461 }
2462
2463 PCM_RELEASE_QUICK(d);
2464
2465 if (*dev != NULL)
2466 dev_ref(*dev);
2467 }
2468
2469 static void
2470 dsp_sysinit(void *p)
2471 {
2472 if (dsp_ehtag != NULL)
2473 return;
2474 /* initialize unit numbering */
2475 snd_unit_init();
2476 dsp_umax = PCMMAXUNIT;
2477 dsp_cmax = PCMMAXCHAN;
2478 dsp_ehtag = EVENTHANDLER_REGISTER(dev_clone, dsp_clone, 0, 1000);
2479 }
2480
2481 static void
2482 dsp_sysuninit(void *p)
2483 {
2484 if (dsp_ehtag == NULL)
2485 return;
2486 EVENTHANDLER_DEREGISTER(dev_clone, dsp_ehtag);
2487 dsp_ehtag = NULL;
2488 }
2489
2490 SYSINIT(dsp_sysinit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysinit, NULL);
2491 SYSUNINIT(dsp_sysuninit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysuninit, NULL);
2492
2493 char *
2494 dsp_unit2name(char *buf, size_t len, int unit)
2495 {
2496 int i, dtype;
2497
2498 KASSERT(buf != NULL && len != 0,
2499 ("bogus buf=%p len=%ju", buf, (uintmax_t)len));
2500
2501 dtype = snd_unit2d(unit);
2502
2503 for (i = 0; i < (sizeof(dsp_cdevs) / sizeof(dsp_cdevs[0])); i++) {
2504 if (dtype != dsp_cdevs[i].type || dsp_cdevs[i].alias != NULL)
2505 continue;
2506 snprintf(buf, len, "%s%d%s%d", dsp_cdevs[i].name,
2507 snd_unit2u(unit), dsp_cdevs[i].sep, snd_unit2c(unit));
2508 return (buf);
2509 }
2510
2511 return (NULL);
2512 }
2513
2514 /**
2515 * @brief Handler for SNDCTL_AUDIOINFO.
2516 *
2517 * Gathers information about the audio device specified in ai->dev. If
2518 * ai->dev == -1, then this function gathers information about the current
2519 * device. If the call comes in on a non-audio device and ai->dev == -1,
2520 * return EINVAL.
2521 *
2522 * This routine is supposed to go practically straight to the hardware,
2523 * getting capabilities directly from the sound card driver, side-stepping
2524 * the intermediate channel interface.
2525 *
2526 * Note, however, that the usefulness of this command is significantly
2527 * decreased when requesting info about any device other than the one serving
2528 * the request. While each snddev_channel refers to a specific device node,
2529 * the converse is *not* true. Currently, when a sound device node is opened,
2530 * the sound subsystem scans for an available audio channel (or channels, if
2531 * opened in read+write) and then assigns them to the si_drv[12] private
2532 * data fields. As a result, any information returned linking a channel to
2533 * a specific character device isn't necessarily accurate.
2534 *
2535 * @note
2536 * Calling threads must not hold any snddev_info or pcm_channel locks.
2537 *
2538 * @param dev device on which the ioctl was issued
2539 * @param ai ioctl request data container
2540 *
2541 * @retval 0 success
2542 * @retval EINVAL ai->dev specifies an invalid device
2543 *
2544 * @todo Verify correctness of Doxygen tags. ;)
2545 */
2546 int
2547 dsp_oss_audioinfo(struct cdev *i_dev, oss_audioinfo *ai)
2548 {
2549 struct pcmchan_caps *caps;
2550 struct pcm_channel *ch;
2551 struct snddev_info *d;
2552 uint32_t fmts;
2553 int i, nchan, *rates, minch, maxch;
2554 char *devname, buf[CHN_NAMELEN];
2555
2556 /*
2557 * If probing the device that received the ioctl, make sure it's a
2558 * DSP device. (Users may use this ioctl with /dev/mixer and
2559 * /dev/midi.)
2560 */
2561 if (ai->dev == -1 && i_dev->si_devsw != &dsp_cdevsw)
2562 return (EINVAL);
2563
2564 ch = NULL;
2565 devname = NULL;
2566 nchan = 0;
2567 bzero(buf, sizeof(buf));
2568
2569 /*
2570 * Search for the requested audio device (channel). Start by
2571 * iterating over pcm devices.
2572 */
2573 for (i = 0; pcm_devclass != NULL &&
2574 i < devclass_get_maxunit(pcm_devclass); i++) {
2575 d = devclass_get_softc(pcm_devclass, i);
2576 if (!PCM_REGISTERED(d))
2577 continue;
2578
2579 /* XXX Need Giant magic entry ??? */
2580
2581 /* See the note in function docblock */
2582 PCM_UNLOCKASSERT(d);
2583 PCM_LOCK(d);
2584
2585 CHN_FOREACH(ch, d, channels.pcm) {
2586 CHN_UNLOCKASSERT(ch);
2587 CHN_LOCK(ch);
2588 if (ai->dev == -1) {
2589 if (DSP_REGISTERED(d, i_dev) &&
2590 (ch == PCM_RDCH(i_dev) || /* record ch */
2591 ch == PCM_WRCH(i_dev))) { /* playback ch */
2592 devname = dsp_unit2name(buf,
2593 sizeof(buf), ch->unit);
2594 }
2595 } else if (ai->dev == nchan) {
2596 devname = dsp_unit2name(buf, sizeof(buf),
2597 ch->unit);
2598 }
2599 if (devname != NULL)
2600 break;
2601 CHN_UNLOCK(ch);
2602 ++nchan;
2603 }
2604
2605 if (devname != NULL) {
2606 /*
2607 * At this point, the following synchronization stuff
2608 * has happened:
2609 * - a specific PCM device is locked.
2610 * - a specific audio channel has been locked, so be
2611 * sure to unlock when exiting;
2612 */
2613
2614 caps = chn_getcaps(ch);
2615
2616 /*
2617 * With all handles collected, zero out the user's
2618 * container and begin filling in its fields.
2619 */
2620 bzero((void *)ai, sizeof(oss_audioinfo));
2621
2622 ai->dev = nchan;
2623 strlcpy(ai->name, ch->name, sizeof(ai->name));
2624
2625 if ((ch->flags & CHN_F_BUSY) == 0)
2626 ai->busy = 0;
2627 else
2628 ai->busy = (ch->direction == PCMDIR_PLAY) ? OPEN_WRITE : OPEN_READ;
2629
2630 /**
2631 * @note
2632 * @c cmd - OSSv4 docs: "Only supported under Linux at
2633 * this moment." Cop-out, I know, but I'll save
2634 * running around in the process table for later.
2635 * Is there a risk of leaking information?
2636 */
2637 ai->pid = ch->pid;
2638
2639 /*
2640 * These flags stolen from SNDCTL_DSP_GETCAPS handler.
2641 * Note, however, that a single channel operates in
2642 * only one direction, so PCM_CAP_DUPLEX is out.
2643 */
2644 /**
2645 * @todo @c SNDCTL_AUDIOINFO::caps - Make drivers keep
2646 * these in pcmchan::caps?
2647 */
2648 ai->caps = PCM_CAP_REALTIME | PCM_CAP_MMAP | PCM_CAP_TRIGGER |
2649 ((ch->direction == PCMDIR_PLAY) ? PCM_CAP_OUTPUT : PCM_CAP_INPUT);
2650
2651 /*
2652 * Collect formats supported @b natively by the
2653 * device. Also determine min/max channels. (I.e.,
2654 * mono, stereo, or both?)
2655 *
2656 * If any channel is stereo, maxch = 2;
2657 * if all channels are stereo, minch = 2, too;
2658 * if any channel is mono, minch = 1;
2659 * and if all channels are mono, maxch = 1.
2660 */
2661 minch = 0;
2662 maxch = 0;
2663 fmts = 0;
2664 for (i = 0; caps->fmtlist[i]; i++) {
2665 fmts |= caps->fmtlist[i];
2666 if (AFMT_CHANNEL(caps->fmtlist[i]) > 1) {
2667 minch = (minch == 0) ? 2 : minch;
2668 maxch = 2;
2669 } else {
2670 minch = 1;
2671 maxch = (maxch == 0) ? 1 : maxch;
2672 }
2673 }
2674
2675 if (ch->direction == PCMDIR_PLAY)
2676 ai->oformats = fmts;
2677 else
2678 ai->iformats = fmts;
2679
2680 /**
2681 * @note
2682 * @c magic - OSSv4 docs: "Reserved for internal use
2683 * by OSS."
2684 *
2685 * @par
2686 * @c card_number - OSSv4 docs: "Number of the sound
2687 * card where this device belongs or -1 if this
2688 * information is not available. Applications
2689 * should normally not use this field for any
2690 * purpose."
2691 */
2692 ai->card_number = -1;
2693 /**
2694 * @todo @c song_name - depends first on
2695 * SNDCTL_[GS]ETSONG @todo @c label - depends
2696 * on SNDCTL_[GS]ETLABEL
2697 * @todo @c port_number - routing information?
2698 */
2699 ai->port_number = -1;
2700 ai->mixer_dev = (d->mixer_dev != NULL) ? PCMUNIT(d->mixer_dev) : -1;
2701 /**
2702 * @note
2703 * @c real_device - OSSv4 docs: "Obsolete."
2704 */
2705 ai->real_device = -1;
2706 strlcpy(ai->devnode, "/dev/", sizeof(ai->devnode));
2707 strlcat(ai->devnode, devname, sizeof(ai->devnode));
2708 ai->enabled = device_is_attached(d->dev) ? 1 : 0;
2709 /**
2710 * @note
2711 * @c flags - OSSv4 docs: "Reserved for future use."
2712 *
2713 * @note
2714 * @c binding - OSSv4 docs: "Reserved for future use."
2715 *
2716 * @todo @c handle - haven't decided how to generate
2717 * this yet; bus, vendor, device IDs?
2718 */
2719 ai->min_rate = caps->minspeed;
2720 ai->max_rate = caps->maxspeed;
2721
2722 ai->min_channels = minch;
2723 ai->max_channels = maxch;
2724
2725 ai->nrates = chn_getrates(ch, &rates);
2726 if (ai->nrates > OSS_MAX_SAMPLE_RATES)
2727 ai->nrates = OSS_MAX_SAMPLE_RATES;
2728
2729 for (i = 0; i < ai->nrates; i++)
2730 ai->rates[i] = rates[i];
2731
2732 ai->next_play_engine = 0;
2733 ai->next_rec_engine = 0;
2734
2735 CHN_UNLOCK(ch);
2736 }
2737
2738 PCM_UNLOCK(d);
2739
2740 if (devname != NULL)
2741 return (0);
2742 }
2743
2744 /* Exhausted the search -- nothing is locked, so return. */
2745 return (EINVAL);
2746 }
2747
2748 /**
2749 * @brief Assigns a PCM channel to a sync group.
2750 *
2751 * Sync groups are used to enable audio operations on multiple devices
2752 * simultaneously. They may be used with any number of devices and may
2753 * span across applications. Devices are added to groups with
2754 * the SNDCTL_DSP_SYNCGROUP ioctl, and operations are triggered with the
2755 * SNDCTL_DSP_SYNCSTART ioctl.
2756 *
2757 * If the @c id field of the @c group parameter is set to zero, then a new
2758 * sync group is created. Otherwise, wrch and rdch (if set) are added to
2759 * the group specified.
2760 *
2761 * @todo As far as memory allocation, should we assume that things are
2762 * okay and allocate with M_WAITOK before acquiring channel locks,
2763 * freeing later if not?
2764 *
2765 * @param wrch output channel associated w/ device (if any)
2766 * @param rdch input channel associated w/ device (if any)
2767 * @param group Sync group parameters
2768 *
2769 * @retval 0 success
2770 * @retval non-zero error to be propagated upstream
2771 */
2772 static int
2773 dsp_oss_syncgroup(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_syncgroup *group)
2774 {
2775 struct pcmchan_syncmember *smrd, *smwr;
2776 struct pcmchan_syncgroup *sg;
2777 int ret, sg_ids[3];
2778
2779 smrd = NULL;
2780 smwr = NULL;
2781 sg = NULL;
2782 ret = 0;
2783
2784 /*
2785 * Free_unr() may sleep, so store released syncgroup IDs until after
2786 * all locks are released.
2787 */
2788 sg_ids[0] = sg_ids[1] = sg_ids[2] = 0;
2789
2790 PCM_SG_LOCK();
2791
2792 /*
2793 * - Insert channel(s) into group's member list.
2794 * - Set CHN_F_NOTRIGGER on channel(s).
2795 * - Stop channel(s).
2796 */
2797
2798 /*
2799 * If device's channels are already mapped to a group, unmap them.
2800 */
2801 if (wrch) {
2802 CHN_LOCK(wrch);
2803 sg_ids[0] = chn_syncdestroy(wrch);
2804 }
2805
2806 if (rdch) {
2807 CHN_LOCK(rdch);
2808 sg_ids[1] = chn_syncdestroy(rdch);
2809 }
2810
2811 /*
2812 * Verify that mode matches character device properites.
2813 * - Bail if PCM_ENABLE_OUTPUT && wrch == NULL.
2814 * - Bail if PCM_ENABLE_INPUT && rdch == NULL.
2815 */
2816 if (((wrch == NULL) && (group->mode & PCM_ENABLE_OUTPUT)) ||
2817 ((rdch == NULL) && (group->mode & PCM_ENABLE_INPUT))) {
2818 ret = EINVAL;
2819 goto out;
2820 }
2821
2822 /*
2823 * An id of zero indicates the user wants to create a new
2824 * syncgroup.
2825 */
2826 if (group->id == 0) {
2827 sg = (struct pcmchan_syncgroup *)malloc(sizeof(*sg), M_DEVBUF, M_NOWAIT);
2828 if (sg != NULL) {
2829 SLIST_INIT(&sg->members);
2830 sg->id = alloc_unr(pcmsg_unrhdr);
2831
2832 group->id = sg->id;
2833 SLIST_INSERT_HEAD(&snd_pcm_syncgroups, sg, link);
2834 } else
2835 ret = ENOMEM;
2836 } else {
2837 SLIST_FOREACH(sg, &snd_pcm_syncgroups, link) {
2838 if (sg->id == group->id)
2839 break;
2840 }
2841 if (sg == NULL)
2842 ret = EINVAL;
2843 }
2844
2845 /* Couldn't create or find a syncgroup. Fail. */
2846 if (sg == NULL)
2847 goto out;
2848
2849 /*
2850 * Allocate a syncmember, assign it and a channel together, and
2851 * insert into syncgroup.
2852 */
2853 if (group->mode & PCM_ENABLE_INPUT) {
2854 smrd = (struct pcmchan_syncmember *)malloc(sizeof(*smrd), M_DEVBUF, M_NOWAIT);
2855 if (smrd == NULL) {
2856 ret = ENOMEM;
2857 goto out;
2858 }
2859
2860 SLIST_INSERT_HEAD(&sg->members, smrd, link);
2861 smrd->parent = sg;
2862 smrd->ch = rdch;
2863
2864 chn_abort(rdch);
2865 rdch->flags |= CHN_F_NOTRIGGER;
2866 rdch->sm = smrd;
2867 }
2868
2869 if (group->mode & PCM_ENABLE_OUTPUT) {
2870 smwr = (struct pcmchan_syncmember *)malloc(sizeof(*smwr), M_DEVBUF, M_NOWAIT);
2871 if (smwr == NULL) {
2872 ret = ENOMEM;
2873 goto out;
2874 }
2875
2876 SLIST_INSERT_HEAD(&sg->members, smwr, link);
2877 smwr->parent = sg;
2878 smwr->ch = wrch;
2879
2880 chn_abort(wrch);
2881 wrch->flags |= CHN_F_NOTRIGGER;
2882 wrch->sm = smwr;
2883 }
2884
2885
2886 out:
2887 if (ret != 0) {
2888 if (smrd != NULL)
2889 free(smrd, M_DEVBUF);
2890 if ((sg != NULL) && SLIST_EMPTY(&sg->members)) {
2891 sg_ids[2] = sg->id;
2892 SLIST_REMOVE(&snd_pcm_syncgroups, sg, pcmchan_syncgroup, link);
2893 free(sg, M_DEVBUF);
2894 }
2895
2896 if (wrch)
2897 wrch->sm = NULL;
2898 if (rdch)
2899 rdch->sm = NULL;
2900 }
2901
2902 if (wrch)
2903 CHN_UNLOCK(wrch);
2904 if (rdch)
2905 CHN_UNLOCK(rdch);
2906
2907 PCM_SG_UNLOCK();
2908
2909 if (sg_ids[0])
2910 free_unr(pcmsg_unrhdr, sg_ids[0]);
2911 if (sg_ids[1])
2912 free_unr(pcmsg_unrhdr, sg_ids[1]);
2913 if (sg_ids[2])
2914 free_unr(pcmsg_unrhdr, sg_ids[2]);
2915
2916 return (ret);
2917 }
2918
2919 /**
2920 * @brief Launch a sync group into action
2921 *
2922 * Sync groups are established via SNDCTL_DSP_SYNCGROUP. This function
2923 * iterates over all members, triggering them along the way.
2924 *
2925 * @note Caller must not hold any channel locks.
2926 *
2927 * @param sg_id sync group identifier
2928 *
2929 * @retval 0 success
2930 * @retval non-zero error worthy of propagating upstream to user
2931 */
2932 static int
2933 dsp_oss_syncstart(int sg_id)
2934 {
2935 struct pcmchan_syncmember *sm, *sm_tmp;
2936 struct pcmchan_syncgroup *sg;
2937 struct pcm_channel *c;
2938 int ret, needlocks;
2939
2940 /* Get the synclists lock */
2941 PCM_SG_LOCK();
2942
2943 do {
2944 ret = 0;
2945 needlocks = 0;
2946
2947 /* Search for syncgroup by ID */
2948 SLIST_FOREACH(sg, &snd_pcm_syncgroups, link) {
2949 if (sg->id == sg_id)
2950 break;
2951 }
2952
2953 /* Return EINVAL if not found */
2954 if (sg == NULL) {
2955 ret = EINVAL;
2956 break;
2957 }
2958
2959 /* Any removals resulting in an empty group should've handled this */
2960 KASSERT(!SLIST_EMPTY(&sg->members), ("found empty syncgroup"));
2961
2962 /*
2963 * Attempt to lock all member channels - if any are already
2964 * locked, unlock those acquired, sleep for a bit, and try
2965 * again.
2966 */
2967 SLIST_FOREACH(sm, &sg->members, link) {
2968 if (CHN_TRYLOCK(sm->ch) == 0) {
2969 int timo = hz * 5/1000;
2970 if (timo < 1)
2971 timo = 1;
2972
2973 /* Release all locked channels so far, retry */
2974 SLIST_FOREACH(sm_tmp, &sg->members, link) {
2975 /* sm is the member already locked */
2976 if (sm == sm_tmp)
2977 break;
2978 CHN_UNLOCK(sm_tmp->ch);
2979 }
2980
2981 /** @todo Is PRIBIO correct/ */
2982 ret = msleep(sm, &snd_pcm_syncgroups_mtx,
2983 PRIBIO | PCATCH, "pcmsg", timo);
2984 if (ret == EINTR || ret == ERESTART)
2985 break;
2986
2987 needlocks = 1;
2988 ret = 0; /* Assumes ret == EAGAIN... */
2989 }
2990 }
2991 } while (needlocks && ret == 0);
2992
2993 /* Proceed only if no errors encountered. */
2994 if (ret == 0) {
2995 /* Launch channels */
2996 while ((sm = SLIST_FIRST(&sg->members)) != NULL) {
2997 SLIST_REMOVE_HEAD(&sg->members, link);
2998
2999 c = sm->ch;
3000 c->sm = NULL;
3001 chn_start(c, 1);
3002 c->flags &= ~CHN_F_NOTRIGGER;
3003 CHN_UNLOCK(c);
3004
3005 free(sm, M_DEVBUF);
3006 }
3007
3008 SLIST_REMOVE(&snd_pcm_syncgroups, sg, pcmchan_syncgroup, link);
3009 free(sg, M_DEVBUF);
3010 }
3011
3012 PCM_SG_UNLOCK();
3013
3014 /*
3015 * Free_unr() may sleep, so be sure to give up the syncgroup lock
3016 * first.
3017 */
3018 if (ret == 0)
3019 free_unr(pcmsg_unrhdr, sg_id);
3020
3021 return (ret);
3022 }
3023
3024 /**
3025 * @brief Handler for SNDCTL_DSP_POLICY
3026 *
3027 * The SNDCTL_DSP_POLICY ioctl is a simpler interface to control fragment
3028 * size and count like with SNDCTL_DSP_SETFRAGMENT. Instead of the user
3029 * specifying those two parameters, s/he simply selects a number from 0..10
3030 * which corresponds to a buffer size. Smaller numbers request smaller
3031 * buffers with lower latencies (at greater overhead from more frequent
3032 * interrupts), while greater numbers behave in the opposite manner.
3033 *
3034 * The 4Front spec states that a value of 5 should be the default. However,
3035 * this implementation deviates slightly by using a linear scale without
3036 * consulting drivers. I.e., even though drivers may have different default
3037 * buffer sizes, a policy argument of 5 will have the same result across
3038 * all drivers.
3039 *
3040 * See http://manuals.opensound.com/developer/SNDCTL_DSP_POLICY.html for
3041 * more information.
3042 *
3043 * @todo When SNDCTL_DSP_COOKEDMODE is supported, it'll be necessary to
3044 * work with hardware drivers directly.
3045 *
3046 * @note PCM channel arguments must not be locked by caller.
3047 *
3048 * @param wrch Pointer to opened playback channel (optional; may be NULL)
3049 * @param rdch " recording channel (optional; may be NULL)
3050 * @param policy Integer from [0:10]
3051 *
3052 * @retval 0 constant (for now)
3053 */
3054 static int
3055 dsp_oss_policy(struct pcm_channel *wrch, struct pcm_channel *rdch, int policy)
3056 {
3057 int ret;
3058
3059 if (policy < CHN_POLICY_MIN || policy > CHN_POLICY_MAX)
3060 return (EIO);
3061
3062 /* Default: success */
3063 ret = 0;
3064
3065 if (rdch) {
3066 CHN_LOCK(rdch);
3067 ret = chn_setlatency(rdch, policy);
3068 CHN_UNLOCK(rdch);
3069 }
3070
3071 if (wrch && ret == 0) {
3072 CHN_LOCK(wrch);
3073 ret = chn_setlatency(wrch, policy);
3074 CHN_UNLOCK(wrch);
3075 }
3076
3077 if (ret)
3078 ret = EIO;
3079
3080 return (ret);
3081 }
3082
3083 /**
3084 * @brief Enable or disable "cooked" mode
3085 *
3086 * This is a handler for @c SNDCTL_DSP_COOKEDMODE. When in cooked mode, which
3087 * is the default, the sound system handles rate and format conversions
3088 * automatically (ex: user writing 11025Hz/8 bit/unsigned but card only
3089 * operates with 44100Hz/16bit/signed samples).
3090 *
3091 * Disabling cooked mode is intended for applications wanting to mmap()
3092 * a sound card's buffer space directly, bypassing the FreeBSD 2-stage
3093 * feeder architecture, presumably to gain as much control over audio
3094 * hardware as possible.
3095 *
3096 * See @c http://manuals.opensound.com/developer/SNDCTL_DSP_COOKEDMODE.html
3097 * for more details.
3098 *
3099 * @param wrch playback channel (optional; may be NULL)
3100 * @param rdch recording channel (optional; may be NULL)
3101 * @param enabled 0 = raw mode, 1 = cooked mode
3102 *
3103 * @retval EINVAL Operation not yet supported.
3104 */
3105 static int
3106 dsp_oss_cookedmode(struct pcm_channel *wrch, struct pcm_channel *rdch, int enabled)
3107 {
3108
3109 /*
3110 * XXX I just don't get it. Why don't they call it
3111 * "BITPERFECT" ~ SNDCTL_DSP_BITPERFECT !?!?.
3112 * This is just plain so confusing, incoherent,
3113 * <insert any non-printable characters here>.
3114 */
3115 if (!(enabled == 1 || enabled == 0))
3116 return (EINVAL);
3117
3118 /*
3119 * I won't give in. I'm inverting its logic here and now.
3120 * Brag all you want, but "BITPERFECT" should be the better
3121 * term here.
3122 */
3123 enabled ^= 0x00000001;
3124
3125 if (wrch != NULL) {
3126 CHN_LOCK(wrch);
3127 wrch->flags &= ~CHN_F_BITPERFECT;
3128 wrch->flags |= (enabled != 0) ? CHN_F_BITPERFECT : 0x00000000;
3129 CHN_UNLOCK(wrch);
3130 }
3131
3132 if (rdch != NULL) {
3133 CHN_LOCK(rdch);
3134 rdch->flags &= ~CHN_F_BITPERFECT;
3135 rdch->flags |= (enabled != 0) ? CHN_F_BITPERFECT : 0x00000000;
3136 CHN_UNLOCK(rdch);
3137 }
3138
3139 return (0);
3140 }
3141
3142 /**
3143 * @brief Retrieve channel interleaving order
3144 *
3145 * This is the handler for @c SNDCTL_DSP_GET_CHNORDER.
3146 *
3147 * See @c http://manuals.opensound.com/developer/SNDCTL_DSP_GET_CHNORDER.html
3148 * for more details.
3149 *
3150 * @note As the ioctl definition is still under construction, FreeBSD
3151 * does not currently support SNDCTL_DSP_GET_CHNORDER.
3152 *
3153 * @param wrch playback channel (optional; may be NULL)
3154 * @param rdch recording channel (optional; may be NULL)
3155 * @param map channel map (result will be stored there)
3156 *
3157 * @retval EINVAL Operation not yet supported.
3158 */
3159 static int
3160 dsp_oss_getchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map)
3161 {
3162 struct pcm_channel *ch;
3163 int ret;
3164
3165 ch = (wrch != NULL) ? wrch : rdch;
3166 if (ch != NULL) {
3167 CHN_LOCK(ch);
3168 ret = chn_oss_getorder(ch, map);
3169 CHN_UNLOCK(ch);
3170 } else
3171 ret = EINVAL;
3172
3173 return (ret);
3174 }
3175
3176 /**
3177 * @brief Specify channel interleaving order
3178 *
3179 * This is the handler for @c SNDCTL_DSP_SET_CHNORDER.
3180 *
3181 * @note As the ioctl definition is still under construction, FreeBSD
3182 * does not currently support @c SNDCTL_DSP_SET_CHNORDER.
3183 *
3184 * @param wrch playback channel (optional; may be NULL)
3185 * @param rdch recording channel (optional; may be NULL)
3186 * @param map channel map
3187 *
3188 * @retval EINVAL Operation not yet supported.
3189 */
3190 static int
3191 dsp_oss_setchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map)
3192 {
3193 int ret;
3194
3195 ret = 0;
3196
3197 if (wrch != NULL) {
3198 CHN_LOCK(wrch);
3199 ret = chn_oss_setorder(wrch, map);
3200 CHN_UNLOCK(wrch);
3201 }
3202
3203 if (ret == 0 && rdch != NULL) {
3204 CHN_LOCK(rdch);
3205 ret = chn_oss_setorder(rdch, map);
3206 CHN_UNLOCK(rdch);
3207 }
3208
3209 return (ret);
3210 }
3211
3212 static int
3213 dsp_oss_getchannelmask(struct pcm_channel *wrch, struct pcm_channel *rdch,
3214 int *mask)
3215 {
3216 struct pcm_channel *ch;
3217 uint32_t chnmask;
3218 int ret;
3219
3220 chnmask = 0;
3221 ch = (wrch != NULL) ? wrch : rdch;
3222
3223 if (ch != NULL) {
3224 CHN_LOCK(ch);
3225 ret = chn_oss_getmask(ch, &chnmask);
3226 CHN_UNLOCK(ch);
3227 } else
3228 ret = EINVAL;
3229
3230 if (ret == 0)
3231 *mask = chnmask;
3232
3233 return (ret);
3234 }
3235
3236 #ifdef OSSV4_EXPERIMENT
3237 /**
3238 * @brief Retrieve an audio device's label
3239 *
3240 * This is a handler for the @c SNDCTL_GETLABEL ioctl.
3241 *
3242 * See @c http://manuals.opensound.com/developer/SNDCTL_GETLABEL.html
3243 * for more details.
3244 *
3245 * From Hannu@4Front: "For example ossxmix (just like some HW mixer
3246 * consoles) can show variable "labels" for certain controls. By default
3247 * the application name (say quake) is shown as the label but
3248 * applications may change the labels themselves."
3249 *
3250 * @note As the ioctl definition is still under construction, FreeBSD
3251 * does not currently support @c SNDCTL_GETLABEL.
3252 *
3253 * @param wrch playback channel (optional; may be NULL)
3254 * @param rdch recording channel (optional; may be NULL)
3255 * @param label label gets copied here
3256 *
3257 * @retval EINVAL Operation not yet supported.
3258 */
3259 static int
3260 dsp_oss_getlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label)
3261 {
3262 return (EINVAL);
3263 }
3264
3265 /**
3266 * @brief Specify an audio device's label
3267 *
3268 * This is a handler for the @c SNDCTL_SETLABEL ioctl. Please see the
3269 * comments for @c dsp_oss_getlabel immediately above.
3270 *
3271 * See @c http://manuals.opensound.com/developer/SNDCTL_GETLABEL.html
3272 * for more details.
3273 *
3274 * @note As the ioctl definition is still under construction, FreeBSD
3275 * does not currently support SNDCTL_SETLABEL.
3276 *
3277 * @param wrch playback channel (optional; may be NULL)
3278 * @param rdch recording channel (optional; may be NULL)
3279 * @param label label gets copied from here
3280 *
3281 * @retval EINVAL Operation not yet supported.
3282 */
3283 static int
3284 dsp_oss_setlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label)
3285 {
3286 return (EINVAL);
3287 }
3288
3289 /**
3290 * @brief Retrieve name of currently played song
3291 *
3292 * This is a handler for the @c SNDCTL_GETSONG ioctl. Audio players could
3293 * tell the system the name of the currently playing song, which would be
3294 * visible in @c /dev/sndstat.
3295 *
3296 * See @c http://manuals.opensound.com/developer/SNDCTL_GETSONG.html
3297 * for more details.
3298 *
3299 * @note As the ioctl definition is still under construction, FreeBSD
3300 * does not currently support SNDCTL_GETSONG.
3301 *
3302 * @param wrch playback channel (optional; may be NULL)
3303 * @param rdch recording channel (optional; may be NULL)
3304 * @param song song name gets copied here
3305 *
3306 * @retval EINVAL Operation not yet supported.
3307 */
3308 static int
3309 dsp_oss_getsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song)
3310 {
3311 return (EINVAL);
3312 }
3313
3314 /**
3315 * @brief Retrieve name of currently played song
3316 *
3317 * This is a handler for the @c SNDCTL_SETSONG ioctl. Audio players could
3318 * tell the system the name of the currently playing song, which would be
3319 * visible in @c /dev/sndstat.
3320 *
3321 * See @c http://manuals.opensound.com/developer/SNDCTL_SETSONG.html
3322 * for more details.
3323 *
3324 * @note As the ioctl definition is still under construction, FreeBSD
3325 * does not currently support SNDCTL_SETSONG.
3326 *
3327 * @param wrch playback channel (optional; may be NULL)
3328 * @param rdch recording channel (optional; may be NULL)
3329 * @param song song name gets copied from here
3330 *
3331 * @retval EINVAL Operation not yet supported.
3332 */
3333 static int
3334 dsp_oss_setsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song)
3335 {
3336 return (EINVAL);
3337 }
3338
3339 /**
3340 * @brief Rename a device
3341 *
3342 * This is a handler for the @c SNDCTL_SETNAME ioctl.
3343 *
3344 * See @c http://manuals.opensound.com/developer/SNDCTL_SETNAME.html for
3345 * more details.
3346 *
3347 * From Hannu@4Front: "This call is used to change the device name
3348 * reported in /dev/sndstat and ossinfo. So instead of using some generic
3349 * 'OSS loopback audio (MIDI) driver' the device may be given a meaningfull
3350 * name depending on the current context (for example 'OSS virtual wave table
3351 * synth' or 'VoIP link to London')."
3352 *
3353 * @note As the ioctl definition is still under construction, FreeBSD
3354 * does not currently support SNDCTL_SETNAME.
3355 *
3356 * @param wrch playback channel (optional; may be NULL)
3357 * @param rdch recording channel (optional; may be NULL)
3358 * @param name new device name gets copied from here
3359 *
3360 * @retval EINVAL Operation not yet supported.
3361 */
3362 static int
3363 dsp_oss_setname(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *name)
3364 {
3365 return (EINVAL);
3366 }
3367 #endif /* !OSSV4_EXPERIMENT */
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