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/10.1/sys/dev/sound/pcm/dsp.c 249585 2013-04-17 11:45:15Z gabor $");
45
46 static int dsp_mmap_allow_prot_exec = 0;
47 SYSCTL_INT(_hw_snd, OID_AUTO, compat_linux_mmap, CTLFLAG_RW,
48 &dsp_mmap_allow_prot_exec, 0,
49 "linux mmap compatibility (-1=force disable 0=auto 1=force enable)");
50
51 struct dsp_cdevinfo {
52 struct pcm_channel *rdch, *wrch;
53 struct pcm_channel *volch;
54 int busy, simplex;
55 TAILQ_ENTRY(dsp_cdevinfo) link;
56 };
57
58 #define PCM_RDCH(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->rdch)
59 #define PCM_WRCH(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->wrch)
60 #define PCM_VOLCH(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->volch)
61 #define PCM_SIMPLEX(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->simplex)
62
63 #define DSP_CDEVINFO_CACHESIZE 8
64
65 #define DSP_REGISTERED(x, y) (PCM_REGISTERED(x) && \
66 (y) != NULL && (y)->si_drv1 != NULL)
67
68 #define OLDPCM_IOCTL
69
70 static d_open_t dsp_open;
71 static d_close_t dsp_close;
72 static d_read_t dsp_read;
73 static d_write_t dsp_write;
74 static d_ioctl_t dsp_ioctl;
75 static d_poll_t dsp_poll;
76 static d_mmap_t dsp_mmap;
77 static d_mmap_single_t dsp_mmap_single;
78
79 struct cdevsw dsp_cdevsw = {
80 .d_version = D_VERSION,
81 .d_open = dsp_open,
82 .d_close = dsp_close,
83 .d_read = dsp_read,
84 .d_write = dsp_write,
85 .d_ioctl = dsp_ioctl,
86 .d_poll = dsp_poll,
87 .d_mmap = dsp_mmap,
88 .d_mmap_single = dsp_mmap_single,
89 .d_name = "dsp",
90 };
91
92 static eventhandler_tag dsp_ehtag = NULL;
93 static int dsp_umax = -1;
94 static int dsp_cmax = -1;
95
96 static int dsp_oss_syncgroup(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_syncgroup *group);
97 static int dsp_oss_syncstart(int sg_id);
98 static int dsp_oss_policy(struct pcm_channel *wrch, struct pcm_channel *rdch, int policy);
99 static int dsp_oss_cookedmode(struct pcm_channel *wrch, struct pcm_channel *rdch, int enabled);
100 static int dsp_oss_getchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map);
101 static int dsp_oss_setchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map);
102 static int dsp_oss_getchannelmask(struct pcm_channel *wrch, struct pcm_channel *rdch, int *mask);
103 #ifdef OSSV4_EXPERIMENT
104 static int dsp_oss_getlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label);
105 static int dsp_oss_setlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label);
106 static int dsp_oss_getsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song);
107 static int dsp_oss_setsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song);
108 static int dsp_oss_setname(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *name);
109 #endif
110
111 static struct snddev_info *
112 dsp_get_info(struct cdev *dev)
113 {
114 return (devclass_get_softc(pcm_devclass, PCMUNIT(dev)));
115 }
116
117 static uint32_t
118 dsp_get_flags(struct cdev *dev)
119 {
120 device_t bdev;
121
122 bdev = devclass_get_device(pcm_devclass, PCMUNIT(dev));
123
124 return ((bdev != NULL) ? pcm_getflags(bdev) : 0xffffffff);
125 }
126
127 static void
128 dsp_set_flags(struct cdev *dev, uint32_t flags)
129 {
130 device_t bdev;
131
132 bdev = devclass_get_device(pcm_devclass, PCMUNIT(dev));
133
134 if (bdev != NULL)
135 pcm_setflags(bdev, flags);
136 }
137
138 /*
139 * return the channels associated with an open device instance.
140 * lock channels specified.
141 */
142 static int
143 getchns(struct cdev *dev, struct pcm_channel **rdch, struct pcm_channel **wrch,
144 uint32_t prio)
145 {
146 struct snddev_info *d;
147 struct pcm_channel *ch;
148 uint32_t flags;
149
150 if (PCM_SIMPLEX(dev) != 0) {
151 d = dsp_get_info(dev);
152 if (!PCM_REGISTERED(d))
153 return (ENXIO);
154 PCM_LOCK(d);
155 PCM_WAIT(d);
156 PCM_ACQUIRE(d);
157 /*
158 * Note: order is important -
159 * pcm flags -> prio query flags -> wild guess
160 */
161 ch = NULL;
162 flags = dsp_get_flags(dev);
163 if (flags & SD_F_PRIO_WR) {
164 ch = PCM_RDCH(dev);
165 PCM_RDCH(dev) = NULL;
166 } else if (flags & SD_F_PRIO_RD) {
167 ch = PCM_WRCH(dev);
168 PCM_WRCH(dev) = NULL;
169 } else if (prio & SD_F_PRIO_WR) {
170 ch = PCM_RDCH(dev);
171 PCM_RDCH(dev) = NULL;
172 flags |= SD_F_PRIO_WR;
173 } else if (prio & SD_F_PRIO_RD) {
174 ch = PCM_WRCH(dev);
175 PCM_WRCH(dev) = NULL;
176 flags |= SD_F_PRIO_RD;
177 } else if (PCM_WRCH(dev) != NULL) {
178 ch = PCM_RDCH(dev);
179 PCM_RDCH(dev) = NULL;
180 flags |= SD_F_PRIO_WR;
181 } else if (PCM_RDCH(dev) != NULL) {
182 ch = PCM_WRCH(dev);
183 PCM_WRCH(dev) = NULL;
184 flags |= SD_F_PRIO_RD;
185 }
186 PCM_SIMPLEX(dev) = 0;
187 dsp_set_flags(dev, flags);
188 if (ch != NULL) {
189 CHN_LOCK(ch);
190 pcm_chnref(ch, -1);
191 pcm_chnrelease(ch);
192 }
193 PCM_RELEASE(d);
194 PCM_UNLOCK(d);
195 }
196
197 *rdch = PCM_RDCH(dev);
198 *wrch = PCM_WRCH(dev);
199
200 if (*rdch != NULL && (prio & SD_F_PRIO_RD))
201 CHN_LOCK(*rdch);
202 if (*wrch != NULL && (prio & SD_F_PRIO_WR))
203 CHN_LOCK(*wrch);
204
205 return (0);
206 }
207
208 /* unlock specified channels */
209 static void
210 relchns(struct cdev *dev, struct pcm_channel *rdch, struct pcm_channel *wrch,
211 uint32_t prio)
212 {
213 if (wrch != NULL && (prio & SD_F_PRIO_WR))
214 CHN_UNLOCK(wrch);
215 if (rdch != NULL && (prio & SD_F_PRIO_RD))
216 CHN_UNLOCK(rdch);
217 }
218
219 static void
220 dsp_cdevinfo_alloc(struct cdev *dev,
221 struct pcm_channel *rdch, struct pcm_channel *wrch,
222 struct pcm_channel *volch)
223 {
224 struct snddev_info *d;
225 struct dsp_cdevinfo *cdi;
226 int simplex;
227
228 d = dsp_get_info(dev);
229
230 KASSERT(PCM_REGISTERED(d) && dev != NULL && dev->si_drv1 == NULL &&
231 ((rdch == NULL && wrch == NULL) || rdch != wrch),
232 ("bogus %s(), what are you trying to accomplish here?", __func__));
233 PCM_BUSYASSERT(d);
234 PCM_LOCKASSERT(d);
235
236 simplex = (dsp_get_flags(dev) & SD_F_SIMPLEX) ? 1 : 0;
237
238 /*
239 * Scan for free instance entry and put it into the end of list.
240 * Create new one if necessary.
241 */
242 TAILQ_FOREACH(cdi, &d->dsp_cdevinfo_pool, link) {
243 if (cdi->busy != 0)
244 break;
245 cdi->rdch = rdch;
246 cdi->wrch = wrch;
247 cdi->volch = volch;
248 cdi->simplex = simplex;
249 cdi->busy = 1;
250 TAILQ_REMOVE(&d->dsp_cdevinfo_pool, cdi, link);
251 TAILQ_INSERT_TAIL(&d->dsp_cdevinfo_pool, cdi, link);
252 dev->si_drv1 = cdi;
253 return;
254 }
255 PCM_UNLOCK(d);
256 cdi = malloc(sizeof(*cdi), M_DEVBUF, M_WAITOK | M_ZERO);
257 PCM_LOCK(d);
258 cdi->rdch = rdch;
259 cdi->wrch = wrch;
260 cdi->volch = volch;
261 cdi->simplex = simplex;
262 cdi->busy = 1;
263 TAILQ_INSERT_TAIL(&d->dsp_cdevinfo_pool, cdi, link);
264 dev->si_drv1 = cdi;
265 }
266
267 static void
268 dsp_cdevinfo_free(struct cdev *dev)
269 {
270 struct snddev_info *d;
271 struct dsp_cdevinfo *cdi, *tmp;
272 uint32_t flags;
273 int i;
274
275 d = dsp_get_info(dev);
276
277 KASSERT(PCM_REGISTERED(d) && dev != NULL && dev->si_drv1 != NULL &&
278 PCM_RDCH(dev) == NULL && PCM_WRCH(dev) == NULL &&
279 PCM_VOLCH(dev) == NULL,
280 ("bogus %s(), what are you trying to accomplish here?", __func__));
281 PCM_BUSYASSERT(d);
282 PCM_LOCKASSERT(d);
283
284 cdi = dev->si_drv1;
285 dev->si_drv1 = NULL;
286 cdi->rdch = NULL;
287 cdi->wrch = NULL;
288 cdi->volch = NULL;
289 cdi->simplex = 0;
290 cdi->busy = 0;
291
292 /*
293 * Once it is free, move it back to the beginning of list for
294 * faster new entry allocation.
295 */
296 TAILQ_REMOVE(&d->dsp_cdevinfo_pool, cdi, link);
297 TAILQ_INSERT_HEAD(&d->dsp_cdevinfo_pool, cdi, link);
298
299 /*
300 * Scan the list, cache free entries up to DSP_CDEVINFO_CACHESIZE.
301 * Reset simplex flags.
302 */
303 flags = dsp_get_flags(dev) & ~SD_F_PRIO_SET;
304 i = DSP_CDEVINFO_CACHESIZE;
305 TAILQ_FOREACH_SAFE(cdi, &d->dsp_cdevinfo_pool, link, tmp) {
306 if (cdi->busy != 0) {
307 if (cdi->simplex == 0) {
308 if (cdi->rdch != NULL)
309 flags |= SD_F_PRIO_RD;
310 if (cdi->wrch != NULL)
311 flags |= SD_F_PRIO_WR;
312 }
313 } else {
314 if (i == 0) {
315 TAILQ_REMOVE(&d->dsp_cdevinfo_pool, cdi, link);
316 free(cdi, M_DEVBUF);
317 } else
318 i--;
319 }
320 }
321 dsp_set_flags(dev, flags);
322 }
323
324 void
325 dsp_cdevinfo_init(struct snddev_info *d)
326 {
327 struct dsp_cdevinfo *cdi;
328 int i;
329
330 KASSERT(d != NULL, ("NULL snddev_info"));
331 PCM_BUSYASSERT(d);
332 PCM_UNLOCKASSERT(d);
333
334 TAILQ_INIT(&d->dsp_cdevinfo_pool);
335 for (i = 0; i < DSP_CDEVINFO_CACHESIZE; i++) {
336 cdi = malloc(sizeof(*cdi), M_DEVBUF, M_WAITOK | M_ZERO);
337 TAILQ_INSERT_HEAD(&d->dsp_cdevinfo_pool, cdi, link);
338 }
339 }
340
341 void
342 dsp_cdevinfo_flush(struct snddev_info *d)
343 {
344 struct dsp_cdevinfo *cdi, *tmp;
345
346 KASSERT(d != NULL, ("NULL snddev_info"));
347 PCM_BUSYASSERT(d);
348 PCM_UNLOCKASSERT(d);
349
350 cdi = TAILQ_FIRST(&d->dsp_cdevinfo_pool);
351 while (cdi != NULL) {
352 tmp = TAILQ_NEXT(cdi, link);
353 free(cdi, M_DEVBUF);
354 cdi = tmp;
355 }
356 TAILQ_INIT(&d->dsp_cdevinfo_pool);
357 }
358
359 /* duplex / simplex cdev type */
360 enum {
361 DSP_CDEV_TYPE_RDONLY, /* simplex read-only (record) */
362 DSP_CDEV_TYPE_WRONLY, /* simplex write-only (play) */
363 DSP_CDEV_TYPE_RDWR /* duplex read, write, or both */
364 };
365
366 enum {
367 DSP_CDEV_VOLCTL_NONE,
368 DSP_CDEV_VOLCTL_READ,
369 DSP_CDEV_VOLCTL_WRITE
370 };
371
372 #define DSP_F_VALID(x) ((x) & (FREAD | FWRITE))
373 #define DSP_F_DUPLEX(x) (((x) & (FREAD | FWRITE)) == (FREAD | FWRITE))
374 #define DSP_F_SIMPLEX(x) (!DSP_F_DUPLEX(x))
375 #define DSP_F_READ(x) ((x) & FREAD)
376 #define DSP_F_WRITE(x) ((x) & FWRITE)
377
378 static const struct {
379 int type;
380 char *name;
381 char *sep;
382 char *alias;
383 int use_sep;
384 int hw;
385 int max;
386 int volctl;
387 uint32_t fmt, spd;
388 int query;
389 } dsp_cdevs[] = {
390 { SND_DEV_DSP, "dsp", ".", NULL, 0, 0, 0, 0,
391 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
392 DSP_CDEV_TYPE_RDWR },
393 { SND_DEV_AUDIO, "audio", ".", NULL, 0, 0, 0, 0,
394 SND_FORMAT(AFMT_MU_LAW, 1, 0), DSP_DEFAULT_SPEED,
395 DSP_CDEV_TYPE_RDWR },
396 { SND_DEV_DSP16, "dspW", ".", NULL, 0, 0, 0, 0,
397 SND_FORMAT(AFMT_S16_LE, 1, 0), DSP_DEFAULT_SPEED,
398 DSP_CDEV_TYPE_RDWR },
399 { SND_DEV_DSPHW_PLAY, "dsp", ".p", NULL, 1, 1, SND_MAXHWCHAN, 1,
400 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_WRONLY },
401 { SND_DEV_DSPHW_VPLAY, "dsp", ".vp", NULL, 1, 1, SND_MAXVCHANS, 1,
402 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_WRONLY },
403 { SND_DEV_DSPHW_REC, "dsp", ".r", NULL, 1, 1, SND_MAXHWCHAN, 1,
404 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_RDONLY },
405 { SND_DEV_DSPHW_VREC, "dsp", ".vr", NULL, 1, 1, SND_MAXVCHANS, 1,
406 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_RDONLY },
407 { SND_DEV_DSPHW_CD, "dspcd", ".", NULL, 0, 0, 0, 0,
408 SND_FORMAT(AFMT_S16_LE, 2, 0), 44100, DSP_CDEV_TYPE_RDWR },
409 /* Low priority, OSSv4 aliases. */
410 { SND_DEV_DSP, "dsp_ac3", ".", "dsp", 0, 0, 0, 0,
411 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
412 DSP_CDEV_TYPE_RDWR },
413 { SND_DEV_DSP, "dsp_mmap", ".", "dsp", 0, 0, 0, 0,
414 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
415 DSP_CDEV_TYPE_RDWR },
416 { SND_DEV_DSP, "dsp_multich", ".", "dsp", 0, 0, 0, 0,
417 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
418 DSP_CDEV_TYPE_RDWR },
419 { SND_DEV_DSP, "dsp_spdifout", ".", "dsp", 0, 0, 0, 0,
420 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
421 DSP_CDEV_TYPE_RDWR },
422 { SND_DEV_DSP, "dsp_spdifin", ".", "dsp", 0, 0, 0, 0,
423 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
424 DSP_CDEV_TYPE_RDWR },
425 };
426
427 #define DSP_FIXUP_ERROR() do { \
428 prio = dsp_get_flags(i_dev); \
429 if (!DSP_F_VALID(flags)) \
430 error = EINVAL; \
431 if (!DSP_F_DUPLEX(flags) && \
432 ((DSP_F_READ(flags) && d->reccount == 0) || \
433 (DSP_F_WRITE(flags) && d->playcount == 0))) \
434 error = ENOTSUP; \
435 else if (!DSP_F_DUPLEX(flags) && (prio & SD_F_SIMPLEX) && \
436 ((DSP_F_READ(flags) && (prio & SD_F_PRIO_WR)) || \
437 (DSP_F_WRITE(flags) && (prio & SD_F_PRIO_RD)))) \
438 error = EBUSY; \
439 else if (DSP_REGISTERED(d, i_dev)) \
440 error = EBUSY; \
441 } while (0)
442
443 static int
444 dsp_open(struct cdev *i_dev, int flags, int mode, struct thread *td)
445 {
446 struct pcm_channel *rdch, *wrch;
447 struct snddev_info *d;
448 uint32_t fmt, spd, prio, volctl;
449 int i, error, rderror, wrerror, devtype, wdevunit, rdevunit;
450
451 /* Kind of impossible.. */
452 if (i_dev == NULL || td == NULL)
453 return (ENODEV);
454
455 d = dsp_get_info(i_dev);
456 if (!PCM_REGISTERED(d))
457 return (EBADF);
458
459 PCM_GIANT_ENTER(d);
460
461 /* Lock snddev so nobody else can monkey with it. */
462 PCM_LOCK(d);
463 PCM_WAIT(d);
464
465 /*
466 * Try to acquire cloned device before someone else pick it.
467 * ENODEV means this is not a cloned droids.
468 */
469 error = snd_clone_acquire(i_dev);
470 if (!(error == 0 || error == ENODEV)) {
471 DSP_FIXUP_ERROR();
472 PCM_UNLOCK(d);
473 PCM_GIANT_EXIT(d);
474 return (error);
475 }
476
477 error = 0;
478 DSP_FIXUP_ERROR();
479
480 if (error != 0) {
481 (void)snd_clone_release(i_dev);
482 PCM_UNLOCK(d);
483 PCM_GIANT_EXIT(d);
484 return (error);
485 }
486
487 /*
488 * That is just enough. Acquire and unlock pcm lock so
489 * the other will just have to wait until we finish doing
490 * everything.
491 */
492 PCM_ACQUIRE(d);
493 PCM_UNLOCK(d);
494
495 devtype = PCMDEV(i_dev);
496 wdevunit = -1;
497 rdevunit = -1;
498 fmt = 0;
499 spd = 0;
500 volctl = DSP_CDEV_VOLCTL_NONE;
501
502 for (i = 0; i < (sizeof(dsp_cdevs) / sizeof(dsp_cdevs[0])); i++) {
503 if (devtype != dsp_cdevs[i].type || dsp_cdevs[i].alias != NULL)
504 continue;
505 /*
506 * Volume control only valid for DSPHW devices,
507 * and it must be opened in opposite direction be it
508 * simplex or duplex. Anything else will be handled
509 * as usual.
510 */
511 if (dsp_cdevs[i].query == DSP_CDEV_TYPE_WRONLY) {
512 if (dsp_cdevs[i].volctl != 0 &&
513 DSP_F_READ(flags)) {
514 volctl = DSP_CDEV_VOLCTL_WRITE;
515 flags &= ~FREAD;
516 flags |= FWRITE;
517 }
518 if (DSP_F_READ(flags)) {
519 (void)snd_clone_release(i_dev);
520 PCM_RELEASE_QUICK(d);
521 PCM_GIANT_EXIT(d);
522 return (ENOTSUP);
523 }
524 wdevunit = dev2unit(i_dev);
525 } else if (dsp_cdevs[i].query == DSP_CDEV_TYPE_RDONLY) {
526 if (dsp_cdevs[i].volctl != 0 &&
527 DSP_F_WRITE(flags)) {
528 volctl = DSP_CDEV_VOLCTL_READ;
529 flags &= ~FWRITE;
530 flags |= FREAD;
531 }
532 if (DSP_F_WRITE(flags)) {
533 (void)snd_clone_release(i_dev);
534 PCM_RELEASE_QUICK(d);
535 PCM_GIANT_EXIT(d);
536 return (ENOTSUP);
537 }
538 rdevunit = dev2unit(i_dev);
539 }
540 fmt = dsp_cdevs[i].fmt;
541 spd = dsp_cdevs[i].spd;
542 break;
543 }
544
545 /* No matching devtype? */
546 if (fmt == 0 || spd == 0)
547 panic("impossible devtype %d", devtype);
548
549 rdch = NULL;
550 wrch = NULL;
551 rderror = 0;
552 wrerror = 0;
553
554 /*
555 * if we get here, the open request is valid- either:
556 * * we were previously not open
557 * * we were open for play xor record and the opener wants
558 * the non-open direction
559 */
560 if (DSP_F_READ(flags)) {
561 /* open for read */
562 rderror = pcm_chnalloc(d, &rdch, PCMDIR_REC,
563 td->td_proc->p_pid, td->td_proc->p_comm, rdevunit);
564
565 if (rderror == 0 && chn_reset(rdch, fmt, spd) != 0)
566 rderror = ENXIO;
567
568 if (volctl == DSP_CDEV_VOLCTL_READ)
569 rderror = 0;
570
571 if (rderror != 0) {
572 if (rdch != NULL)
573 pcm_chnrelease(rdch);
574 if (!DSP_F_DUPLEX(flags)) {
575 (void)snd_clone_release(i_dev);
576 PCM_RELEASE_QUICK(d);
577 PCM_GIANT_EXIT(d);
578 return (rderror);
579 }
580 rdch = NULL;
581 } else if (volctl == DSP_CDEV_VOLCTL_READ) {
582 if (rdch != NULL) {
583 pcm_chnref(rdch, 1);
584 pcm_chnrelease(rdch);
585 }
586 } else {
587 if (flags & O_NONBLOCK)
588 rdch->flags |= CHN_F_NBIO;
589 if (flags & O_EXCL)
590 rdch->flags |= CHN_F_EXCLUSIVE;
591 pcm_chnref(rdch, 1);
592 if (volctl == DSP_CDEV_VOLCTL_NONE)
593 chn_vpc_reset(rdch, SND_VOL_C_PCM, 0);
594 CHN_UNLOCK(rdch);
595 }
596 }
597
598 if (DSP_F_WRITE(flags)) {
599 /* open for write */
600 wrerror = pcm_chnalloc(d, &wrch, PCMDIR_PLAY,
601 td->td_proc->p_pid, td->td_proc->p_comm, wdevunit);
602
603 if (wrerror == 0 && chn_reset(wrch, fmt, spd) != 0)
604 wrerror = ENXIO;
605
606 if (volctl == DSP_CDEV_VOLCTL_WRITE)
607 wrerror = 0;
608
609 if (wrerror != 0) {
610 if (wrch != NULL)
611 pcm_chnrelease(wrch);
612 if (!DSP_F_DUPLEX(flags)) {
613 if (rdch != NULL) {
614 /*
615 * Lock, deref and release previously
616 * created record channel
617 */
618 CHN_LOCK(rdch);
619 pcm_chnref(rdch, -1);
620 pcm_chnrelease(rdch);
621 }
622 (void)snd_clone_release(i_dev);
623 PCM_RELEASE_QUICK(d);
624 PCM_GIANT_EXIT(d);
625 return (wrerror);
626 }
627 wrch = NULL;
628 } else if (volctl == DSP_CDEV_VOLCTL_WRITE) {
629 if (wrch != NULL) {
630 pcm_chnref(wrch, 1);
631 pcm_chnrelease(wrch);
632 }
633 } else {
634 if (flags & O_NONBLOCK)
635 wrch->flags |= CHN_F_NBIO;
636 if (flags & O_EXCL)
637 wrch->flags |= CHN_F_EXCLUSIVE;
638 pcm_chnref(wrch, 1);
639 if (volctl == DSP_CDEV_VOLCTL_NONE)
640 chn_vpc_reset(wrch, SND_VOL_C_PCM, 0);
641 CHN_UNLOCK(wrch);
642 }
643 }
644
645
646 PCM_LOCK(d);
647
648 /*
649 * We're done. Allocate channels information for this cdev.
650 */
651 switch (volctl) {
652 case DSP_CDEV_VOLCTL_READ:
653 KASSERT(wrch == NULL, ("wrch=%p not null!", wrch));
654 dsp_cdevinfo_alloc(i_dev, NULL, NULL, rdch);
655 break;
656 case DSP_CDEV_VOLCTL_WRITE:
657 KASSERT(rdch == NULL, ("rdch=%p not null!", rdch));
658 dsp_cdevinfo_alloc(i_dev, NULL, NULL, wrch);
659 break;
660 case DSP_CDEV_VOLCTL_NONE:
661 default:
662 if (wrch == NULL && rdch == NULL) {
663 (void)snd_clone_release(i_dev);
664 PCM_RELEASE(d);
665 PCM_UNLOCK(d);
666 PCM_GIANT_EXIT(d);
667 if (wrerror != 0)
668 return (wrerror);
669 if (rderror != 0)
670 return (rderror);
671 return (EINVAL);
672 }
673 dsp_cdevinfo_alloc(i_dev, rdch, wrch, NULL);
674 if (rdch != NULL)
675 CHN_INSERT_HEAD(d, rdch, channels.pcm.opened);
676 if (wrch != NULL)
677 CHN_INSERT_HEAD(d, wrch, channels.pcm.opened);
678 break;
679 }
680
681 /*
682 * Increase clone refcount for its automatic garbage collector.
683 */
684 (void)snd_clone_ref(i_dev);
685
686 PCM_RELEASE(d);
687 PCM_UNLOCK(d);
688
689 PCM_GIANT_LEAVE(d);
690
691 return (0);
692 }
693
694 static int
695 dsp_close(struct cdev *i_dev, int flags, int mode, struct thread *td)
696 {
697 struct pcm_channel *rdch, *wrch, *volch;
698 struct snddev_info *d;
699 int sg_ids, rdref, wdref;
700
701 d = dsp_get_info(i_dev);
702 if (!DSP_REGISTERED(d, i_dev))
703 return (EBADF);
704
705 PCM_GIANT_ENTER(d);
706
707 PCM_LOCK(d);
708 PCM_WAIT(d);
709 PCM_ACQUIRE(d);
710
711 rdch = PCM_RDCH(i_dev);
712 wrch = PCM_WRCH(i_dev);
713 volch = PCM_VOLCH(i_dev);
714
715 PCM_RDCH(i_dev) = NULL;
716 PCM_WRCH(i_dev) = NULL;
717 PCM_VOLCH(i_dev) = NULL;
718
719 rdref = -1;
720 wdref = -1;
721
722 if (volch != NULL) {
723 if (volch == rdch)
724 rdref--;
725 else if (volch == wrch)
726 wdref--;
727 else {
728 CHN_LOCK(volch);
729 pcm_chnref(volch, -1);
730 CHN_UNLOCK(volch);
731 }
732 }
733
734 if (rdch != NULL)
735 CHN_REMOVE(d, rdch, channels.pcm.opened);
736 if (wrch != NULL)
737 CHN_REMOVE(d, wrch, channels.pcm.opened);
738
739 if (rdch != NULL || wrch != NULL) {
740 PCM_UNLOCK(d);
741 if (rdch != NULL) {
742 /*
743 * The channel itself need not be locked because:
744 * a) Adding a channel to a syncgroup happens only
745 * in dsp_ioctl(), which cannot run concurrently
746 * to dsp_close().
747 * b) The syncmember pointer (sm) is protected by
748 * the global syncgroup list lock.
749 * c) A channel can't just disappear, invalidating
750 * pointers, unless it's closed/dereferenced
751 * first.
752 */
753 PCM_SG_LOCK();
754 sg_ids = chn_syncdestroy(rdch);
755 PCM_SG_UNLOCK();
756 if (sg_ids != 0)
757 free_unr(pcmsg_unrhdr, sg_ids);
758
759 CHN_LOCK(rdch);
760 pcm_chnref(rdch, rdref);
761 chn_abort(rdch); /* won't sleep */
762 rdch->flags &= ~(CHN_F_RUNNING | CHN_F_MMAP |
763 CHN_F_DEAD | CHN_F_EXCLUSIVE);
764 chn_reset(rdch, 0, 0);
765 pcm_chnrelease(rdch);
766 }
767 if (wrch != NULL) {
768 /*
769 * Please see block above.
770 */
771 PCM_SG_LOCK();
772 sg_ids = chn_syncdestroy(wrch);
773 PCM_SG_UNLOCK();
774 if (sg_ids != 0)
775 free_unr(pcmsg_unrhdr, sg_ids);
776
777 CHN_LOCK(wrch);
778 pcm_chnref(wrch, wdref);
779 chn_flush(wrch); /* may sleep */
780 wrch->flags &= ~(CHN_F_RUNNING | CHN_F_MMAP |
781 CHN_F_DEAD | CHN_F_EXCLUSIVE);
782 chn_reset(wrch, 0, 0);
783 pcm_chnrelease(wrch);
784 }
785 PCM_LOCK(d);
786 }
787
788 dsp_cdevinfo_free(i_dev);
789 /*
790 * Release clone busy state and unref it so the automatic
791 * garbage collector will get the hint and do the remaining
792 * cleanup process.
793 */
794 (void)snd_clone_release(i_dev);
795
796 /*
797 * destroy_dev() might sleep, so release pcm lock
798 * here and rely on pcm cv serialization.
799 */
800 PCM_UNLOCK(d);
801 (void)snd_clone_unref(i_dev);
802 PCM_LOCK(d);
803
804 PCM_RELEASE(d);
805 PCM_UNLOCK(d);
806
807 PCM_GIANT_LEAVE(d);
808
809 return (0);
810 }
811
812 static __inline int
813 dsp_io_ops(struct cdev *i_dev, struct uio *buf)
814 {
815 struct snddev_info *d;
816 struct pcm_channel **ch, *rdch, *wrch;
817 int (*chn_io)(struct pcm_channel *, struct uio *);
818 int prio, ret;
819 pid_t runpid;
820
821 KASSERT(i_dev != NULL && buf != NULL &&
822 (buf->uio_rw == UIO_READ || buf->uio_rw == UIO_WRITE),
823 ("%s(): io train wreck!", __func__));
824
825 d = dsp_get_info(i_dev);
826 if (!DSP_REGISTERED(d, i_dev))
827 return (EBADF);
828
829 PCM_GIANT_ENTER(d);
830
831 switch (buf->uio_rw) {
832 case UIO_READ:
833 prio = SD_F_PRIO_RD;
834 ch = &rdch;
835 chn_io = chn_read;
836 break;
837 case UIO_WRITE:
838 prio = SD_F_PRIO_WR;
839 ch = &wrch;
840 chn_io = chn_write;
841 break;
842 default:
843 panic("invalid/corrupted uio direction: %d", buf->uio_rw);
844 break;
845 }
846
847 rdch = NULL;
848 wrch = NULL;
849 runpid = buf->uio_td->td_proc->p_pid;
850
851 getchns(i_dev, &rdch, &wrch, prio);
852
853 if (*ch == NULL || !((*ch)->flags & CHN_F_BUSY)) {
854 PCM_GIANT_EXIT(d);
855 return (EBADF);
856 }
857
858 if (((*ch)->flags & (CHN_F_MMAP | CHN_F_DEAD)) ||
859 (((*ch)->flags & CHN_F_RUNNING) && (*ch)->pid != runpid)) {
860 relchns(i_dev, rdch, wrch, prio);
861 PCM_GIANT_EXIT(d);
862 return (EINVAL);
863 } else if (!((*ch)->flags & CHN_F_RUNNING)) {
864 (*ch)->flags |= CHN_F_RUNNING;
865 (*ch)->pid = runpid;
866 }
867
868 /*
869 * chn_read/write must give up channel lock in order to copy bytes
870 * from/to userland, so up the "in progress" counter to make sure
871 * someone else doesn't come along and muss up the buffer.
872 */
873 ++(*ch)->inprog;
874 ret = chn_io(*ch, buf);
875 --(*ch)->inprog;
876
877 CHN_BROADCAST(&(*ch)->cv);
878
879 relchns(i_dev, rdch, wrch, prio);
880
881 PCM_GIANT_LEAVE(d);
882
883 return (ret);
884 }
885
886 static int
887 dsp_read(struct cdev *i_dev, struct uio *buf, int flag)
888 {
889 return (dsp_io_ops(i_dev, buf));
890 }
891
892 static int
893 dsp_write(struct cdev *i_dev, struct uio *buf, int flag)
894 {
895 return (dsp_io_ops(i_dev, buf));
896 }
897
898 static int
899 dsp_get_volume_channel(struct cdev *dev, struct pcm_channel **volch)
900 {
901 struct snddev_info *d;
902 struct pcm_channel *c;
903 int unit;
904
905 KASSERT(dev != NULL && volch != NULL,
906 ("%s(): NULL query dev=%p volch=%p", __func__, dev, volch));
907
908 d = dsp_get_info(dev);
909 if (!PCM_REGISTERED(d)) {
910 *volch = NULL;
911 return (EINVAL);
912 }
913
914 PCM_UNLOCKASSERT(d);
915
916 *volch = NULL;
917
918 c = PCM_VOLCH(dev);
919 if (c != NULL) {
920 if (!(c->feederflags & (1 << FEEDER_VOLUME)))
921 return (-1);
922 *volch = c;
923 return (0);
924 }
925
926 PCM_LOCK(d);
927 PCM_WAIT(d);
928 PCM_ACQUIRE(d);
929
930 unit = dev2unit(dev);
931
932 CHN_FOREACH(c, d, channels.pcm) {
933 CHN_LOCK(c);
934 if (c->unit != unit) {
935 CHN_UNLOCK(c);
936 continue;
937 }
938 *volch = c;
939 pcm_chnref(c, 1);
940 PCM_VOLCH(dev) = c;
941 CHN_UNLOCK(c);
942 PCM_RELEASE(d);
943 PCM_UNLOCK(d);
944 return ((c->feederflags & (1 << FEEDER_VOLUME)) ? 0 : -1);
945 }
946
947 PCM_RELEASE(d);
948 PCM_UNLOCK(d);
949
950 return (EINVAL);
951 }
952
953 static int
954 dsp_ioctl_channel(struct cdev *dev, struct pcm_channel *volch, u_long cmd,
955 caddr_t arg)
956 {
957 struct snddev_info *d;
958 struct pcm_channel *rdch, *wrch;
959 int j, devtype, ret;
960
961 d = dsp_get_info(dev);
962 if (!PCM_REGISTERED(d) || !(dsp_get_flags(dev) & SD_F_VPC))
963 return (-1);
964
965 PCM_UNLOCKASSERT(d);
966
967 j = cmd & 0xff;
968
969 rdch = PCM_RDCH(dev);
970 wrch = PCM_WRCH(dev);
971
972 /* No specific channel, look into cache */
973 if (volch == NULL)
974 volch = PCM_VOLCH(dev);
975
976 /* Look harder */
977 if (volch == NULL) {
978 if (j == SOUND_MIXER_RECLEV && rdch != NULL)
979 volch = rdch;
980 else if (j == SOUND_MIXER_PCM && wrch != NULL)
981 volch = wrch;
982 }
983
984 devtype = PCMDEV(dev);
985
986 /* Look super harder */
987 if (volch == NULL &&
988 (devtype == SND_DEV_DSPHW_PLAY || devtype == SND_DEV_DSPHW_VPLAY ||
989 devtype == SND_DEV_DSPHW_REC || devtype == SND_DEV_DSPHW_VREC)) {
990 ret = dsp_get_volume_channel(dev, &volch);
991 if (ret != 0)
992 return (ret);
993 if (volch == NULL)
994 return (EINVAL);
995 }
996
997 /* Final validation */
998 if (volch != NULL) {
999 CHN_LOCK(volch);
1000 if (!(volch->feederflags & (1 << FEEDER_VOLUME))) {
1001 CHN_UNLOCK(volch);
1002 return (-1);
1003 }
1004 if (volch->direction == PCMDIR_PLAY)
1005 wrch = volch;
1006 else
1007 rdch = volch;
1008 }
1009
1010 ret = EINVAL;
1011
1012 if (volch != NULL &&
1013 ((j == SOUND_MIXER_PCM && volch->direction == PCMDIR_PLAY) ||
1014 (j == SOUND_MIXER_RECLEV && volch->direction == PCMDIR_REC))) {
1015 if ((cmd & ~0xff) == MIXER_WRITE(0)) {
1016 int left, right, center;
1017
1018 left = *(int *)arg & 0x7f;
1019 right = ((*(int *)arg) >> 8) & 0x7f;
1020 center = (left + right) >> 1;
1021 chn_setvolume_multi(volch, SND_VOL_C_PCM, left, right,
1022 center);
1023 } else if ((cmd & ~0xff) == MIXER_READ(0)) {
1024 *(int *)arg = CHN_GETVOLUME(volch,
1025 SND_VOL_C_PCM, SND_CHN_T_FL);
1026 *(int *)arg |= CHN_GETVOLUME(volch,
1027 SND_VOL_C_PCM, SND_CHN_T_FR) << 8;
1028 }
1029 ret = 0;
1030 } else if (rdch != NULL || wrch != NULL) {
1031 switch (j) {
1032 case SOUND_MIXER_DEVMASK:
1033 case SOUND_MIXER_CAPS:
1034 case SOUND_MIXER_STEREODEVS:
1035 if ((cmd & ~0xff) == MIXER_READ(0)) {
1036 *(int *)arg = 0;
1037 if (rdch != NULL)
1038 *(int *)arg |= SOUND_MASK_RECLEV;
1039 if (wrch != NULL)
1040 *(int *)arg |= SOUND_MASK_PCM;
1041 }
1042 ret = 0;
1043 break;
1044 case SOUND_MIXER_RECMASK:
1045 case SOUND_MIXER_RECSRC:
1046 if ((cmd & ~0xff) == MIXER_READ(0))
1047 *(int *)arg = 0;
1048 ret = 0;
1049 break;
1050 default:
1051 break;
1052 }
1053 }
1054
1055 if (volch != NULL)
1056 CHN_UNLOCK(volch);
1057
1058 return (ret);
1059 }
1060
1061 static int
1062 dsp_ioctl(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode,
1063 struct thread *td)
1064 {
1065 struct pcm_channel *chn, *rdch, *wrch;
1066 struct snddev_info *d;
1067 u_long xcmd;
1068 int *arg_i, ret, tmp;
1069
1070 d = dsp_get_info(i_dev);
1071 if (!DSP_REGISTERED(d, i_dev))
1072 return (EBADF);
1073
1074 PCM_GIANT_ENTER(d);
1075
1076 arg_i = (int *)arg;
1077 ret = 0;
1078 xcmd = 0;
1079 chn = NULL;
1080
1081 if (IOCGROUP(cmd) == 'M') {
1082 if (cmd == OSS_GETVERSION) {
1083 *arg_i = SOUND_VERSION;
1084 PCM_GIANT_EXIT(d);
1085 return (0);
1086 }
1087 ret = dsp_ioctl_channel(i_dev, PCM_VOLCH(i_dev), cmd, arg);
1088 if (ret != -1) {
1089 PCM_GIANT_EXIT(d);
1090 return (ret);
1091 }
1092
1093 if (d->mixer_dev != NULL) {
1094 PCM_ACQUIRE_QUICK(d);
1095 ret = mixer_ioctl_cmd(d->mixer_dev, cmd, arg, -1, td,
1096 MIXER_CMD_DIRECT);
1097 PCM_RELEASE_QUICK(d);
1098 } else
1099 ret = EBADF;
1100
1101 PCM_GIANT_EXIT(d);
1102
1103 return (ret);
1104 }
1105
1106 /*
1107 * Certain ioctls may be made on any type of device (audio, mixer,
1108 * and MIDI). Handle those special cases here.
1109 */
1110 if (IOCGROUP(cmd) == 'X') {
1111 PCM_ACQUIRE_QUICK(d);
1112 switch(cmd) {
1113 case SNDCTL_SYSINFO:
1114 sound_oss_sysinfo((oss_sysinfo *)arg);
1115 break;
1116 case SNDCTL_CARDINFO:
1117 ret = sound_oss_card_info((oss_card_info *)arg);
1118 break;
1119 case SNDCTL_AUDIOINFO:
1120 case SNDCTL_AUDIOINFO_EX:
1121 case SNDCTL_ENGINEINFO:
1122 ret = dsp_oss_audioinfo(i_dev, (oss_audioinfo *)arg);
1123 break;
1124 case SNDCTL_MIXERINFO:
1125 ret = mixer_oss_mixerinfo(i_dev, (oss_mixerinfo *)arg);
1126 break;
1127 default:
1128 ret = EINVAL;
1129 }
1130 PCM_RELEASE_QUICK(d);
1131 PCM_GIANT_EXIT(d);
1132 return (ret);
1133 }
1134
1135 getchns(i_dev, &rdch, &wrch, 0);
1136
1137 if (wrch != NULL && (wrch->flags & CHN_F_DEAD))
1138 wrch = NULL;
1139 if (rdch != NULL && (rdch->flags & CHN_F_DEAD))
1140 rdch = NULL;
1141
1142 if (wrch == NULL && rdch == NULL) {
1143 PCM_GIANT_EXIT(d);
1144 return (EINVAL);
1145 }
1146
1147 switch(cmd) {
1148 #ifdef OLDPCM_IOCTL
1149 /*
1150 * we start with the new ioctl interface.
1151 */
1152 case AIONWRITE: /* how many bytes can write ? */
1153 if (wrch) {
1154 CHN_LOCK(wrch);
1155 /*
1156 if (wrch && wrch->bufhard.dl)
1157 while (chn_wrfeed(wrch) == 0);
1158 */
1159 *arg_i = sndbuf_getfree(wrch->bufsoft);
1160 CHN_UNLOCK(wrch);
1161 } else {
1162 *arg_i = 0;
1163 ret = EINVAL;
1164 }
1165 break;
1166
1167 case AIOSSIZE: /* set the current blocksize */
1168 {
1169 struct snd_size *p = (struct snd_size *)arg;
1170
1171 p->play_size = 0;
1172 p->rec_size = 0;
1173 PCM_ACQUIRE_QUICK(d);
1174 if (wrch) {
1175 CHN_LOCK(wrch);
1176 chn_setblocksize(wrch, 2, p->play_size);
1177 p->play_size = sndbuf_getblksz(wrch->bufsoft);
1178 CHN_UNLOCK(wrch);
1179 }
1180 if (rdch) {
1181 CHN_LOCK(rdch);
1182 chn_setblocksize(rdch, 2, p->rec_size);
1183 p->rec_size = sndbuf_getblksz(rdch->bufsoft);
1184 CHN_UNLOCK(rdch);
1185 }
1186 PCM_RELEASE_QUICK(d);
1187 }
1188 break;
1189 case AIOGSIZE: /* get the current blocksize */
1190 {
1191 struct snd_size *p = (struct snd_size *)arg;
1192
1193 if (wrch) {
1194 CHN_LOCK(wrch);
1195 p->play_size = sndbuf_getblksz(wrch->bufsoft);
1196 CHN_UNLOCK(wrch);
1197 }
1198 if (rdch) {
1199 CHN_LOCK(rdch);
1200 p->rec_size = sndbuf_getblksz(rdch->bufsoft);
1201 CHN_UNLOCK(rdch);
1202 }
1203 }
1204 break;
1205
1206 case AIOSFMT:
1207 case AIOGFMT:
1208 {
1209 snd_chan_param *p = (snd_chan_param *)arg;
1210
1211 if (cmd == AIOSFMT &&
1212 ((p->play_format != 0 && p->play_rate == 0) ||
1213 (p->rec_format != 0 && p->rec_rate == 0))) {
1214 ret = EINVAL;
1215 break;
1216 }
1217 PCM_ACQUIRE_QUICK(d);
1218 if (wrch) {
1219 CHN_LOCK(wrch);
1220 if (cmd == AIOSFMT && p->play_format != 0) {
1221 chn_setformat(wrch,
1222 SND_FORMAT(p->play_format,
1223 AFMT_CHANNEL(wrch->format),
1224 AFMT_EXTCHANNEL(wrch->format)));
1225 chn_setspeed(wrch, p->play_rate);
1226 }
1227 p->play_rate = wrch->speed;
1228 p->play_format = AFMT_ENCODING(wrch->format);
1229 CHN_UNLOCK(wrch);
1230 } else {
1231 p->play_rate = 0;
1232 p->play_format = 0;
1233 }
1234 if (rdch) {
1235 CHN_LOCK(rdch);
1236 if (cmd == AIOSFMT && p->rec_format != 0) {
1237 chn_setformat(rdch,
1238 SND_FORMAT(p->rec_format,
1239 AFMT_CHANNEL(rdch->format),
1240 AFMT_EXTCHANNEL(rdch->format)));
1241 chn_setspeed(rdch, p->rec_rate);
1242 }
1243 p->rec_rate = rdch->speed;
1244 p->rec_format = AFMT_ENCODING(rdch->format);
1245 CHN_UNLOCK(rdch);
1246 } else {
1247 p->rec_rate = 0;
1248 p->rec_format = 0;
1249 }
1250 PCM_RELEASE_QUICK(d);
1251 }
1252 break;
1253
1254 case AIOGCAP: /* get capabilities */
1255 {
1256 snd_capabilities *p = (snd_capabilities *)arg;
1257 struct pcmchan_caps *pcaps = NULL, *rcaps = NULL;
1258 struct cdev *pdev;
1259
1260 PCM_LOCK(d);
1261 if (rdch) {
1262 CHN_LOCK(rdch);
1263 rcaps = chn_getcaps(rdch);
1264 }
1265 if (wrch) {
1266 CHN_LOCK(wrch);
1267 pcaps = chn_getcaps(wrch);
1268 }
1269 p->rate_min = max(rcaps? rcaps->minspeed : 0,
1270 pcaps? pcaps->minspeed : 0);
1271 p->rate_max = min(rcaps? rcaps->maxspeed : 1000000,
1272 pcaps? pcaps->maxspeed : 1000000);
1273 p->bufsize = min(rdch? sndbuf_getsize(rdch->bufsoft) : 1000000,
1274 wrch? sndbuf_getsize(wrch->bufsoft) : 1000000);
1275 /* XXX bad on sb16 */
1276 p->formats = (rdch? chn_getformats(rdch) : 0xffffffff) &
1277 (wrch? chn_getformats(wrch) : 0xffffffff);
1278 if (rdch && wrch)
1279 p->formats |= (dsp_get_flags(i_dev) & SD_F_SIMPLEX)? 0 : AFMT_FULLDUPLEX;
1280 pdev = d->mixer_dev;
1281 p->mixers = 1; /* default: one mixer */
1282 p->inputs = pdev->si_drv1? mix_getdevs(pdev->si_drv1) : 0;
1283 p->left = p->right = 100;
1284 if (wrch)
1285 CHN_UNLOCK(wrch);
1286 if (rdch)
1287 CHN_UNLOCK(rdch);
1288 PCM_UNLOCK(d);
1289 }
1290 break;
1291
1292 case AIOSTOP:
1293 if (*arg_i == AIOSYNC_PLAY && wrch) {
1294 CHN_LOCK(wrch);
1295 *arg_i = chn_abort(wrch);
1296 CHN_UNLOCK(wrch);
1297 } else if (*arg_i == AIOSYNC_CAPTURE && rdch) {
1298 CHN_LOCK(rdch);
1299 *arg_i = chn_abort(rdch);
1300 CHN_UNLOCK(rdch);
1301 } else {
1302 printf("AIOSTOP: bad channel 0x%x\n", *arg_i);
1303 *arg_i = 0;
1304 }
1305 break;
1306
1307 case AIOSYNC:
1308 printf("AIOSYNC chan 0x%03lx pos %lu unimplemented\n",
1309 ((snd_sync_parm *)arg)->chan, ((snd_sync_parm *)arg)->pos);
1310 break;
1311 #endif
1312 /*
1313 * here follow the standard ioctls (filio.h etc.)
1314 */
1315 case FIONREAD: /* get # bytes to read */
1316 if (rdch) {
1317 CHN_LOCK(rdch);
1318 /* if (rdch && rdch->bufhard.dl)
1319 while (chn_rdfeed(rdch) == 0);
1320 */
1321 *arg_i = sndbuf_getready(rdch->bufsoft);
1322 CHN_UNLOCK(rdch);
1323 } else {
1324 *arg_i = 0;
1325 ret = EINVAL;
1326 }
1327 break;
1328
1329 case FIOASYNC: /*set/clear async i/o */
1330 DEB( printf("FIOASYNC\n") ; )
1331 break;
1332
1333 case SNDCTL_DSP_NONBLOCK: /* set non-blocking i/o */
1334 case FIONBIO: /* set/clear non-blocking i/o */
1335 if (rdch) {
1336 CHN_LOCK(rdch);
1337 if (cmd == SNDCTL_DSP_NONBLOCK || *arg_i)
1338 rdch->flags |= CHN_F_NBIO;
1339 else
1340 rdch->flags &= ~CHN_F_NBIO;
1341 CHN_UNLOCK(rdch);
1342 }
1343 if (wrch) {
1344 CHN_LOCK(wrch);
1345 if (cmd == SNDCTL_DSP_NONBLOCK || *arg_i)
1346 wrch->flags |= CHN_F_NBIO;
1347 else
1348 wrch->flags &= ~CHN_F_NBIO;
1349 CHN_UNLOCK(wrch);
1350 }
1351 break;
1352
1353 /*
1354 * Finally, here is the linux-compatible ioctl interface
1355 */
1356 #define THE_REAL_SNDCTL_DSP_GETBLKSIZE _IOWR('P', 4, int)
1357 case THE_REAL_SNDCTL_DSP_GETBLKSIZE:
1358 case SNDCTL_DSP_GETBLKSIZE:
1359 chn = wrch ? wrch : rdch;
1360 if (chn) {
1361 CHN_LOCK(chn);
1362 *arg_i = sndbuf_getblksz(chn->bufsoft);
1363 CHN_UNLOCK(chn);
1364 } else {
1365 *arg_i = 0;
1366 ret = EINVAL;
1367 }
1368 break;
1369
1370 case SNDCTL_DSP_SETBLKSIZE:
1371 RANGE(*arg_i, 16, 65536);
1372 PCM_ACQUIRE_QUICK(d);
1373 if (wrch) {
1374 CHN_LOCK(wrch);
1375 chn_setblocksize(wrch, 2, *arg_i);
1376 CHN_UNLOCK(wrch);
1377 }
1378 if (rdch) {
1379 CHN_LOCK(rdch);
1380 chn_setblocksize(rdch, 2, *arg_i);
1381 CHN_UNLOCK(rdch);
1382 }
1383 PCM_RELEASE_QUICK(d);
1384 break;
1385
1386 case SNDCTL_DSP_RESET:
1387 DEB(printf("dsp reset\n"));
1388 if (wrch) {
1389 CHN_LOCK(wrch);
1390 chn_abort(wrch);
1391 chn_resetbuf(wrch);
1392 CHN_UNLOCK(wrch);
1393 }
1394 if (rdch) {
1395 CHN_LOCK(rdch);
1396 chn_abort(rdch);
1397 chn_resetbuf(rdch);
1398 CHN_UNLOCK(rdch);
1399 }
1400 break;
1401
1402 case SNDCTL_DSP_SYNC:
1403 DEB(printf("dsp sync\n"));
1404 /* chn_sync may sleep */
1405 if (wrch) {
1406 CHN_LOCK(wrch);
1407 chn_sync(wrch, 0);
1408 CHN_UNLOCK(wrch);
1409 }
1410 break;
1411
1412 case SNDCTL_DSP_SPEED:
1413 /* chn_setspeed may sleep */
1414 tmp = 0;
1415 PCM_ACQUIRE_QUICK(d);
1416 if (wrch) {
1417 CHN_LOCK(wrch);
1418 ret = chn_setspeed(wrch, *arg_i);
1419 tmp = wrch->speed;
1420 CHN_UNLOCK(wrch);
1421 }
1422 if (rdch && ret == 0) {
1423 CHN_LOCK(rdch);
1424 ret = chn_setspeed(rdch, *arg_i);
1425 if (tmp == 0)
1426 tmp = rdch->speed;
1427 CHN_UNLOCK(rdch);
1428 }
1429 PCM_RELEASE_QUICK(d);
1430 *arg_i = tmp;
1431 break;
1432
1433 case SOUND_PCM_READ_RATE:
1434 chn = wrch ? wrch : rdch;
1435 if (chn) {
1436 CHN_LOCK(chn);
1437 *arg_i = chn->speed;
1438 CHN_UNLOCK(chn);
1439 } else {
1440 *arg_i = 0;
1441 ret = EINVAL;
1442 }
1443 break;
1444
1445 case SNDCTL_DSP_STEREO:
1446 tmp = -1;
1447 *arg_i = (*arg_i)? 2 : 1;
1448 PCM_ACQUIRE_QUICK(d);
1449 if (wrch) {
1450 CHN_LOCK(wrch);
1451 ret = chn_setformat(wrch,
1452 SND_FORMAT(wrch->format, *arg_i, 0));
1453 tmp = (AFMT_CHANNEL(wrch->format) > 1)? 1 : 0;
1454 CHN_UNLOCK(wrch);
1455 }
1456 if (rdch && ret == 0) {
1457 CHN_LOCK(rdch);
1458 ret = chn_setformat(rdch,
1459 SND_FORMAT(rdch->format, *arg_i, 0));
1460 if (tmp == -1)
1461 tmp = (AFMT_CHANNEL(rdch->format) > 1)? 1 : 0;
1462 CHN_UNLOCK(rdch);
1463 }
1464 PCM_RELEASE_QUICK(d);
1465 *arg_i = tmp;
1466 break;
1467
1468 case SOUND_PCM_WRITE_CHANNELS:
1469 /* case SNDCTL_DSP_CHANNELS: ( == SOUND_PCM_WRITE_CHANNELS) */
1470 if (*arg_i < 0) {
1471 *arg_i = 0;
1472 ret = EINVAL;
1473 break;
1474 }
1475 if (*arg_i != 0) {
1476 struct pcmchan_matrix *m;
1477 uint32_t ext;
1478
1479 tmp = 0;
1480 if (*arg_i > SND_CHN_MAX)
1481 *arg_i = SND_CHN_MAX;
1482
1483 m = feeder_matrix_default_channel_map(*arg_i);
1484 if (m != NULL)
1485 ext = m->ext;
1486 else
1487 ext = 0;
1488
1489 PCM_ACQUIRE_QUICK(d);
1490 if (wrch) {
1491 CHN_LOCK(wrch);
1492 ret = chn_setformat(wrch,
1493 SND_FORMAT(wrch->format, *arg_i, ext));
1494 tmp = AFMT_CHANNEL(wrch->format);
1495 CHN_UNLOCK(wrch);
1496 }
1497 if (rdch && ret == 0) {
1498 CHN_LOCK(rdch);
1499 ret = chn_setformat(rdch,
1500 SND_FORMAT(rdch->format, *arg_i, ext));
1501 if (tmp == 0)
1502 tmp = AFMT_CHANNEL(rdch->format);
1503 CHN_UNLOCK(rdch);
1504 }
1505 PCM_RELEASE_QUICK(d);
1506 *arg_i = tmp;
1507 } else {
1508 chn = wrch ? wrch : rdch;
1509 CHN_LOCK(chn);
1510 *arg_i = AFMT_CHANNEL(chn->format);
1511 CHN_UNLOCK(chn);
1512 }
1513 break;
1514
1515 case SOUND_PCM_READ_CHANNELS:
1516 chn = wrch ? wrch : rdch;
1517 if (chn) {
1518 CHN_LOCK(chn);
1519 *arg_i = AFMT_CHANNEL(chn->format);
1520 CHN_UNLOCK(chn);
1521 } else {
1522 *arg_i = 0;
1523 ret = EINVAL;
1524 }
1525 break;
1526
1527 case SNDCTL_DSP_GETFMTS: /* returns a mask of supported fmts */
1528 chn = wrch ? wrch : rdch;
1529 if (chn) {
1530 CHN_LOCK(chn);
1531 *arg_i = chn_getformats(chn);
1532 CHN_UNLOCK(chn);
1533 } else {
1534 *arg_i = 0;
1535 ret = EINVAL;
1536 }
1537 break;
1538
1539 case SNDCTL_DSP_SETFMT: /* sets _one_ format */
1540 if (*arg_i != AFMT_QUERY) {
1541 tmp = 0;
1542 PCM_ACQUIRE_QUICK(d);
1543 if (wrch) {
1544 CHN_LOCK(wrch);
1545 ret = chn_setformat(wrch, SND_FORMAT(*arg_i,
1546 AFMT_CHANNEL(wrch->format),
1547 AFMT_EXTCHANNEL(wrch->format)));
1548 tmp = wrch->format;
1549 CHN_UNLOCK(wrch);
1550 }
1551 if (rdch && ret == 0) {
1552 CHN_LOCK(rdch);
1553 ret = chn_setformat(rdch, SND_FORMAT(*arg_i,
1554 AFMT_CHANNEL(rdch->format),
1555 AFMT_EXTCHANNEL(rdch->format)));
1556 if (tmp == 0)
1557 tmp = rdch->format;
1558 CHN_UNLOCK(rdch);
1559 }
1560 PCM_RELEASE_QUICK(d);
1561 *arg_i = AFMT_ENCODING(tmp);
1562 } else {
1563 chn = wrch ? wrch : rdch;
1564 CHN_LOCK(chn);
1565 *arg_i = AFMT_ENCODING(chn->format);
1566 CHN_UNLOCK(chn);
1567 }
1568 break;
1569
1570 case SNDCTL_DSP_SETFRAGMENT:
1571 DEB(printf("SNDCTL_DSP_SETFRAGMENT 0x%08x\n", *(int *)arg));
1572 {
1573 uint32_t fragln = (*arg_i) & 0x0000ffff;
1574 uint32_t maxfrags = ((*arg_i) & 0xffff0000) >> 16;
1575 uint32_t fragsz;
1576 uint32_t r_maxfrags, r_fragsz;
1577
1578 RANGE(fragln, 4, 16);
1579 fragsz = 1 << fragln;
1580
1581 if (maxfrags == 0)
1582 maxfrags = CHN_2NDBUFMAXSIZE / fragsz;
1583 if (maxfrags < 2)
1584 maxfrags = 2;
1585 if (maxfrags * fragsz > CHN_2NDBUFMAXSIZE)
1586 maxfrags = CHN_2NDBUFMAXSIZE / fragsz;
1587
1588 DEB(printf("SNDCTL_DSP_SETFRAGMENT %d frags, %d sz\n", maxfrags, fragsz));
1589 PCM_ACQUIRE_QUICK(d);
1590 if (rdch) {
1591 CHN_LOCK(rdch);
1592 ret = chn_setblocksize(rdch, maxfrags, fragsz);
1593 r_maxfrags = sndbuf_getblkcnt(rdch->bufsoft);
1594 r_fragsz = sndbuf_getblksz(rdch->bufsoft);
1595 CHN_UNLOCK(rdch);
1596 } else {
1597 r_maxfrags = maxfrags;
1598 r_fragsz = fragsz;
1599 }
1600 if (wrch && ret == 0) {
1601 CHN_LOCK(wrch);
1602 ret = chn_setblocksize(wrch, maxfrags, fragsz);
1603 maxfrags = sndbuf_getblkcnt(wrch->bufsoft);
1604 fragsz = sndbuf_getblksz(wrch->bufsoft);
1605 CHN_UNLOCK(wrch);
1606 } else { /* use whatever came from the read channel */
1607 maxfrags = r_maxfrags;
1608 fragsz = r_fragsz;
1609 }
1610 PCM_RELEASE_QUICK(d);
1611
1612 fragln = 0;
1613 while (fragsz > 1) {
1614 fragln++;
1615 fragsz >>= 1;
1616 }
1617 *arg_i = (maxfrags << 16) | fragln;
1618 }
1619 break;
1620
1621 case SNDCTL_DSP_GETISPACE:
1622 /* return the size of data available in the input queue */
1623 {
1624 audio_buf_info *a = (audio_buf_info *)arg;
1625 if (rdch) {
1626 struct snd_dbuf *bs = rdch->bufsoft;
1627
1628 CHN_LOCK(rdch);
1629 a->bytes = sndbuf_getready(bs);
1630 a->fragments = a->bytes / sndbuf_getblksz(bs);
1631 a->fragstotal = sndbuf_getblkcnt(bs);
1632 a->fragsize = sndbuf_getblksz(bs);
1633 CHN_UNLOCK(rdch);
1634 } else
1635 ret = EINVAL;
1636 }
1637 break;
1638
1639 case SNDCTL_DSP_GETOSPACE:
1640 /* return space available in the output queue */
1641 {
1642 audio_buf_info *a = (audio_buf_info *)arg;
1643 if (wrch) {
1644 struct snd_dbuf *bs = wrch->bufsoft;
1645
1646 CHN_LOCK(wrch);
1647 /* XXX abusive DMA update: chn_wrupdate(wrch); */
1648 a->bytes = sndbuf_getfree(bs);
1649 a->fragments = a->bytes / sndbuf_getblksz(bs);
1650 a->fragstotal = sndbuf_getblkcnt(bs);
1651 a->fragsize = sndbuf_getblksz(bs);
1652 CHN_UNLOCK(wrch);
1653 } else
1654 ret = EINVAL;
1655 }
1656 break;
1657
1658 case SNDCTL_DSP_GETIPTR:
1659 {
1660 count_info *a = (count_info *)arg;
1661 if (rdch) {
1662 struct snd_dbuf *bs = rdch->bufsoft;
1663
1664 CHN_LOCK(rdch);
1665 /* XXX abusive DMA update: chn_rdupdate(rdch); */
1666 a->bytes = sndbuf_gettotal(bs);
1667 a->blocks = sndbuf_getblocks(bs) - rdch->blocks;
1668 a->ptr = sndbuf_getfreeptr(bs);
1669 rdch->blocks = sndbuf_getblocks(bs);
1670 CHN_UNLOCK(rdch);
1671 } else
1672 ret = EINVAL;
1673 }
1674 break;
1675
1676 case SNDCTL_DSP_GETOPTR:
1677 {
1678 count_info *a = (count_info *)arg;
1679 if (wrch) {
1680 struct snd_dbuf *bs = wrch->bufsoft;
1681
1682 CHN_LOCK(wrch);
1683 /* XXX abusive DMA update: chn_wrupdate(wrch); */
1684 a->bytes = sndbuf_gettotal(bs);
1685 a->blocks = sndbuf_getblocks(bs) - wrch->blocks;
1686 a->ptr = sndbuf_getreadyptr(bs);
1687 wrch->blocks = sndbuf_getblocks(bs);
1688 CHN_UNLOCK(wrch);
1689 } else
1690 ret = EINVAL;
1691 }
1692 break;
1693
1694 case SNDCTL_DSP_GETCAPS:
1695 PCM_LOCK(d);
1696 *arg_i = PCM_CAP_REALTIME | PCM_CAP_MMAP | PCM_CAP_TRIGGER;
1697 if (rdch && wrch && !(dsp_get_flags(i_dev) & SD_F_SIMPLEX))
1698 *arg_i |= PCM_CAP_DUPLEX;
1699 PCM_UNLOCK(d);
1700 break;
1701
1702 case SOUND_PCM_READ_BITS:
1703 chn = wrch ? wrch : rdch;
1704 if (chn) {
1705 CHN_LOCK(chn);
1706 if (chn->format & AFMT_8BIT)
1707 *arg_i = 8;
1708 else if (chn->format & AFMT_16BIT)
1709 *arg_i = 16;
1710 else if (chn->format & AFMT_24BIT)
1711 *arg_i = 24;
1712 else if (chn->format & AFMT_32BIT)
1713 *arg_i = 32;
1714 else
1715 ret = EINVAL;
1716 CHN_UNLOCK(chn);
1717 } else {
1718 *arg_i = 0;
1719 ret = EINVAL;
1720 }
1721 break;
1722
1723 case SNDCTL_DSP_SETTRIGGER:
1724 if (rdch) {
1725 CHN_LOCK(rdch);
1726 rdch->flags &= ~CHN_F_NOTRIGGER;
1727 if (*arg_i & PCM_ENABLE_INPUT)
1728 chn_start(rdch, 1);
1729 else {
1730 chn_abort(rdch);
1731 chn_resetbuf(rdch);
1732 rdch->flags |= CHN_F_NOTRIGGER;
1733 }
1734 CHN_UNLOCK(rdch);
1735 }
1736 if (wrch) {
1737 CHN_LOCK(wrch);
1738 wrch->flags &= ~CHN_F_NOTRIGGER;
1739 if (*arg_i & PCM_ENABLE_OUTPUT)
1740 chn_start(wrch, 1);
1741 else {
1742 chn_abort(wrch);
1743 chn_resetbuf(wrch);
1744 wrch->flags |= CHN_F_NOTRIGGER;
1745 }
1746 CHN_UNLOCK(wrch);
1747 }
1748 break;
1749
1750 case SNDCTL_DSP_GETTRIGGER:
1751 *arg_i = 0;
1752 if (wrch) {
1753 CHN_LOCK(wrch);
1754 if (wrch->flags & CHN_F_TRIGGERED)
1755 *arg_i |= PCM_ENABLE_OUTPUT;
1756 CHN_UNLOCK(wrch);
1757 }
1758 if (rdch) {
1759 CHN_LOCK(rdch);
1760 if (rdch->flags & CHN_F_TRIGGERED)
1761 *arg_i |= PCM_ENABLE_INPUT;
1762 CHN_UNLOCK(rdch);
1763 }
1764 break;
1765
1766 case SNDCTL_DSP_GETODELAY:
1767 if (wrch) {
1768 struct snd_dbuf *bs = wrch->bufsoft;
1769
1770 CHN_LOCK(wrch);
1771 /* XXX abusive DMA update: chn_wrupdate(wrch); */
1772 *arg_i = sndbuf_getready(bs);
1773 CHN_UNLOCK(wrch);
1774 } else
1775 ret = EINVAL;
1776 break;
1777
1778 case SNDCTL_DSP_POST:
1779 if (wrch) {
1780 CHN_LOCK(wrch);
1781 wrch->flags &= ~CHN_F_NOTRIGGER;
1782 chn_start(wrch, 1);
1783 CHN_UNLOCK(wrch);
1784 }
1785 break;
1786
1787 case SNDCTL_DSP_SETDUPLEX:
1788 /*
1789 * switch to full-duplex mode if card is in half-duplex
1790 * mode and is able to work in full-duplex mode
1791 */
1792 PCM_LOCK(d);
1793 if (rdch && wrch && (dsp_get_flags(i_dev) & SD_F_SIMPLEX))
1794 dsp_set_flags(i_dev, dsp_get_flags(i_dev)^SD_F_SIMPLEX);
1795 PCM_UNLOCK(d);
1796 break;
1797
1798 /*
1799 * The following four ioctls are simple wrappers around mixer_ioctl
1800 * with no further processing. xcmd is short for "translated
1801 * command".
1802 */
1803 case SNDCTL_DSP_GETRECVOL:
1804 if (xcmd == 0) {
1805 xcmd = SOUND_MIXER_READ_RECLEV;
1806 chn = rdch;
1807 }
1808 /* FALLTHROUGH */
1809 case SNDCTL_DSP_SETRECVOL:
1810 if (xcmd == 0) {
1811 xcmd = SOUND_MIXER_WRITE_RECLEV;
1812 chn = rdch;
1813 }
1814 /* FALLTHROUGH */
1815 case SNDCTL_DSP_GETPLAYVOL:
1816 if (xcmd == 0) {
1817 xcmd = SOUND_MIXER_READ_PCM;
1818 chn = wrch;
1819 }
1820 /* FALLTHROUGH */
1821 case SNDCTL_DSP_SETPLAYVOL:
1822 if (xcmd == 0) {
1823 xcmd = SOUND_MIXER_WRITE_PCM;
1824 chn = wrch;
1825 }
1826
1827 ret = dsp_ioctl_channel(i_dev, chn, xcmd, arg);
1828 if (ret != -1) {
1829 PCM_GIANT_EXIT(d);
1830 return (ret);
1831 }
1832
1833 if (d->mixer_dev != NULL) {
1834 PCM_ACQUIRE_QUICK(d);
1835 ret = mixer_ioctl_cmd(d->mixer_dev, xcmd, arg, -1, td,
1836 MIXER_CMD_DIRECT);
1837 PCM_RELEASE_QUICK(d);
1838 } else
1839 ret = ENOTSUP;
1840
1841 break;
1842
1843 case SNDCTL_DSP_GET_RECSRC_NAMES:
1844 case SNDCTL_DSP_GET_RECSRC:
1845 case SNDCTL_DSP_SET_RECSRC:
1846 if (d->mixer_dev != NULL) {
1847 PCM_ACQUIRE_QUICK(d);
1848 ret = mixer_ioctl_cmd(d->mixer_dev, cmd, arg, -1, td,
1849 MIXER_CMD_DIRECT);
1850 PCM_RELEASE_QUICK(d);
1851 } else
1852 ret = ENOTSUP;
1853 break;
1854
1855 /*
1856 * The following 3 ioctls aren't very useful at the moment. For
1857 * now, only a single channel is associated with a cdev (/dev/dspN
1858 * instance), so there's only a single output routing to use (i.e.,
1859 * the wrch bound to this cdev).
1860 */
1861 case SNDCTL_DSP_GET_PLAYTGT_NAMES:
1862 {
1863 oss_mixer_enuminfo *ei;
1864 ei = (oss_mixer_enuminfo *)arg;
1865 ei->dev = 0;
1866 ei->ctrl = 0;
1867 ei->version = 0; /* static for now */
1868 ei->strindex[0] = 0;
1869
1870 if (wrch != NULL) {
1871 ei->nvalues = 1;
1872 strlcpy(ei->strings, wrch->name,
1873 sizeof(ei->strings));
1874 } else {
1875 ei->nvalues = 0;
1876 ei->strings[0] = '\0';
1877 }
1878 }
1879 break;
1880 case SNDCTL_DSP_GET_PLAYTGT:
1881 case SNDCTL_DSP_SET_PLAYTGT: /* yes, they are the same for now */
1882 /*
1883 * Re: SET_PLAYTGT
1884 * OSSv4: "The value that was accepted by the device will
1885 * be returned back in the variable pointed by the
1886 * argument."
1887 */
1888 if (wrch != NULL)
1889 *arg_i = 0;
1890 else
1891 ret = EINVAL;
1892 break;
1893
1894 case SNDCTL_DSP_SILENCE:
1895 /*
1896 * Flush the software (pre-feed) buffer, but try to minimize playback
1897 * interruption. (I.e., record unplayed samples with intent to
1898 * restore by SNDCTL_DSP_SKIP.) Intended for application "pause"
1899 * functionality.
1900 */
1901 if (wrch == NULL)
1902 ret = EINVAL;
1903 else {
1904 struct snd_dbuf *bs;
1905 CHN_LOCK(wrch);
1906 while (wrch->inprog != 0)
1907 cv_wait(&wrch->cv, wrch->lock);
1908 bs = wrch->bufsoft;
1909 if ((bs->shadbuf != NULL) && (sndbuf_getready(bs) > 0)) {
1910 bs->sl = sndbuf_getready(bs);
1911 sndbuf_dispose(bs, bs->shadbuf, sndbuf_getready(bs));
1912 sndbuf_fillsilence(bs);
1913 chn_start(wrch, 0);
1914 }
1915 CHN_UNLOCK(wrch);
1916 }
1917 break;
1918
1919 case SNDCTL_DSP_SKIP:
1920 /*
1921 * OSSv4 docs: "This ioctl call discards all unplayed samples in the
1922 * playback buffer by moving the current write position immediately
1923 * before the point where the device is currently reading the samples."
1924 */
1925 if (wrch == NULL)
1926 ret = EINVAL;
1927 else {
1928 struct snd_dbuf *bs;
1929 CHN_LOCK(wrch);
1930 while (wrch->inprog != 0)
1931 cv_wait(&wrch->cv, wrch->lock);
1932 bs = wrch->bufsoft;
1933 if ((bs->shadbuf != NULL) && (bs->sl > 0)) {
1934 sndbuf_softreset(bs);
1935 sndbuf_acquire(bs, bs->shadbuf, bs->sl);
1936 bs->sl = 0;
1937 chn_start(wrch, 0);
1938 }
1939 CHN_UNLOCK(wrch);
1940 }
1941 break;
1942
1943 case SNDCTL_DSP_CURRENT_OPTR:
1944 case SNDCTL_DSP_CURRENT_IPTR:
1945 /**
1946 * @note Changing formats resets the buffer counters, which differs
1947 * from the 4Front drivers. However, I don't expect this to be
1948 * much of a problem.
1949 *
1950 * @note In a test where @c CURRENT_OPTR is called immediately after write
1951 * returns, this driver is about 32K samples behind whereas
1952 * 4Front's is about 8K samples behind. Should determine source
1953 * of discrepancy, even if only out of curiosity.
1954 *
1955 * @todo Actually test SNDCTL_DSP_CURRENT_IPTR.
1956 */
1957 chn = (cmd == SNDCTL_DSP_CURRENT_OPTR) ? wrch : rdch;
1958 if (chn == NULL)
1959 ret = EINVAL;
1960 else {
1961 struct snd_dbuf *bs;
1962 /* int tmp; */
1963
1964 oss_count_t *oc = (oss_count_t *)arg;
1965
1966 CHN_LOCK(chn);
1967 bs = chn->bufsoft;
1968 #if 0
1969 tmp = (sndbuf_getsize(b) + chn_getptr(chn) - sndbuf_gethwptr(b)) % sndbuf_getsize(b);
1970 oc->samples = (sndbuf_gettotal(b) + tmp) / sndbuf_getalign(b);
1971 oc->fifo_samples = (sndbuf_getready(b) - tmp) / sndbuf_getalign(b);
1972 #else
1973 oc->samples = sndbuf_gettotal(bs) / sndbuf_getalign(bs);
1974 oc->fifo_samples = sndbuf_getready(bs) / sndbuf_getalign(bs);
1975 #endif
1976 CHN_UNLOCK(chn);
1977 }
1978 break;
1979
1980 case SNDCTL_DSP_HALT_OUTPUT:
1981 case SNDCTL_DSP_HALT_INPUT:
1982 chn = (cmd == SNDCTL_DSP_HALT_OUTPUT) ? wrch : rdch;
1983 if (chn == NULL)
1984 ret = EINVAL;
1985 else {
1986 CHN_LOCK(chn);
1987 chn_abort(chn);
1988 CHN_UNLOCK(chn);
1989 }
1990 break;
1991
1992 case SNDCTL_DSP_LOW_WATER:
1993 /*
1994 * Set the number of bytes required to attract attention by
1995 * select/poll.
1996 */
1997 if (wrch != NULL) {
1998 CHN_LOCK(wrch);
1999 wrch->lw = (*arg_i > 1) ? *arg_i : 1;
2000 CHN_UNLOCK(wrch);
2001 }
2002 if (rdch != NULL) {
2003 CHN_LOCK(rdch);
2004 rdch->lw = (*arg_i > 1) ? *arg_i : 1;
2005 CHN_UNLOCK(rdch);
2006 }
2007 break;
2008
2009 case SNDCTL_DSP_GETERROR:
2010 /*
2011 * OSSv4 docs: "All errors and counters will automatically be
2012 * cleared to zeroes after the call so each call will return only
2013 * the errors that occurred after the previous invocation. ... The
2014 * play_underruns and rec_overrun fields are the only useful fields
2015 * returned by OSS 4.0."
2016 */
2017 {
2018 audio_errinfo *ei = (audio_errinfo *)arg;
2019
2020 bzero((void *)ei, sizeof(*ei));
2021
2022 if (wrch != NULL) {
2023 CHN_LOCK(wrch);
2024 ei->play_underruns = wrch->xruns;
2025 wrch->xruns = 0;
2026 CHN_UNLOCK(wrch);
2027 }
2028 if (rdch != NULL) {
2029 CHN_LOCK(rdch);
2030 ei->rec_overruns = rdch->xruns;
2031 rdch->xruns = 0;
2032 CHN_UNLOCK(rdch);
2033 }
2034 }
2035 break;
2036
2037 case SNDCTL_DSP_SYNCGROUP:
2038 PCM_ACQUIRE_QUICK(d);
2039 ret = dsp_oss_syncgroup(wrch, rdch, (oss_syncgroup *)arg);
2040 PCM_RELEASE_QUICK(d);
2041 break;
2042
2043 case SNDCTL_DSP_SYNCSTART:
2044 PCM_ACQUIRE_QUICK(d);
2045 ret = dsp_oss_syncstart(*arg_i);
2046 PCM_RELEASE_QUICK(d);
2047 break;
2048
2049 case SNDCTL_DSP_POLICY:
2050 PCM_ACQUIRE_QUICK(d);
2051 ret = dsp_oss_policy(wrch, rdch, *arg_i);
2052 PCM_RELEASE_QUICK(d);
2053 break;
2054
2055 case SNDCTL_DSP_COOKEDMODE:
2056 PCM_ACQUIRE_QUICK(d);
2057 if (!(dsp_get_flags(i_dev) & SD_F_BITPERFECT))
2058 ret = dsp_oss_cookedmode(wrch, rdch, *arg_i);
2059 PCM_RELEASE_QUICK(d);
2060 break;
2061 case SNDCTL_DSP_GET_CHNORDER:
2062 PCM_ACQUIRE_QUICK(d);
2063 ret = dsp_oss_getchnorder(wrch, rdch, (unsigned long long *)arg);
2064 PCM_RELEASE_QUICK(d);
2065 break;
2066 case SNDCTL_DSP_SET_CHNORDER:
2067 PCM_ACQUIRE_QUICK(d);
2068 ret = dsp_oss_setchnorder(wrch, rdch, (unsigned long long *)arg);
2069 PCM_RELEASE_QUICK(d);
2070 break;
2071 case SNDCTL_DSP_GETCHANNELMASK: /* XXX vlc */
2072 PCM_ACQUIRE_QUICK(d);
2073 ret = dsp_oss_getchannelmask(wrch, rdch, (int *)arg);
2074 PCM_RELEASE_QUICK(d);
2075 break;
2076 case SNDCTL_DSP_BIND_CHANNEL: /* XXX what?!? */
2077 ret = EINVAL;
2078 break;
2079 #ifdef OSSV4_EXPERIMENT
2080 /*
2081 * XXX The following ioctls are not yet supported and just return
2082 * EINVAL.
2083 */
2084 case SNDCTL_DSP_GETOPEAKS:
2085 case SNDCTL_DSP_GETIPEAKS:
2086 chn = (cmd == SNDCTL_DSP_GETOPEAKS) ? wrch : rdch;
2087 if (chn == NULL)
2088 ret = EINVAL;
2089 else {
2090 oss_peaks_t *op = (oss_peaks_t *)arg;
2091 int lpeak, rpeak;
2092
2093 CHN_LOCK(chn);
2094 ret = chn_getpeaks(chn, &lpeak, &rpeak);
2095 if (ret == -1)
2096 ret = EINVAL;
2097 else {
2098 (*op)[0] = lpeak;
2099 (*op)[1] = rpeak;
2100 }
2101 CHN_UNLOCK(chn);
2102 }
2103 break;
2104
2105 /*
2106 * XXX Once implemented, revisit this for proper cv protection
2107 * (if necessary).
2108 */
2109 case SNDCTL_GETLABEL:
2110 ret = dsp_oss_getlabel(wrch, rdch, (oss_label_t *)arg);
2111 break;
2112 case SNDCTL_SETLABEL:
2113 ret = dsp_oss_setlabel(wrch, rdch, (oss_label_t *)arg);
2114 break;
2115 case SNDCTL_GETSONG:
2116 ret = dsp_oss_getsong(wrch, rdch, (oss_longname_t *)arg);
2117 break;
2118 case SNDCTL_SETSONG:
2119 ret = dsp_oss_setsong(wrch, rdch, (oss_longname_t *)arg);
2120 break;
2121 case SNDCTL_SETNAME:
2122 ret = dsp_oss_setname(wrch, rdch, (oss_longname_t *)arg);
2123 break;
2124 #if 0
2125 /**
2126 * @note The S/PDIF interface ioctls, @c SNDCTL_DSP_READCTL and
2127 * @c SNDCTL_DSP_WRITECTL have been omitted at the suggestion of
2128 * 4Front Technologies.
2129 */
2130 case SNDCTL_DSP_READCTL:
2131 case SNDCTL_DSP_WRITECTL:
2132 ret = EINVAL;
2133 break;
2134 #endif /* !0 (explicitly omitted ioctls) */
2135
2136 #endif /* !OSSV4_EXPERIMENT */
2137 case SNDCTL_DSP_MAPINBUF:
2138 case SNDCTL_DSP_MAPOUTBUF:
2139 case SNDCTL_DSP_SETSYNCRO:
2140 /* undocumented */
2141
2142 case SNDCTL_DSP_SUBDIVIDE:
2143 case SOUND_PCM_WRITE_FILTER:
2144 case SOUND_PCM_READ_FILTER:
2145 /* dunno what these do, don't sound important */
2146
2147 default:
2148 DEB(printf("default ioctl fn 0x%08lx fail\n", cmd));
2149 ret = EINVAL;
2150 break;
2151 }
2152
2153 PCM_GIANT_LEAVE(d);
2154
2155 return (ret);
2156 }
2157
2158 static int
2159 dsp_poll(struct cdev *i_dev, int events, struct thread *td)
2160 {
2161 struct snddev_info *d;
2162 struct pcm_channel *wrch, *rdch;
2163 int ret, e;
2164
2165 d = dsp_get_info(i_dev);
2166 if (!DSP_REGISTERED(d, i_dev))
2167 return (EBADF);
2168
2169 PCM_GIANT_ENTER(d);
2170
2171 wrch = NULL;
2172 rdch = NULL;
2173 ret = 0;
2174
2175 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
2176
2177 if (wrch != NULL && !(wrch->flags & CHN_F_DEAD)) {
2178 e = (events & (POLLOUT | POLLWRNORM));
2179 if (e)
2180 ret |= chn_poll(wrch, e, td);
2181 }
2182
2183 if (rdch != NULL && !(rdch->flags & CHN_F_DEAD)) {
2184 e = (events & (POLLIN | POLLRDNORM));
2185 if (e)
2186 ret |= chn_poll(rdch, e, td);
2187 }
2188
2189 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
2190
2191 PCM_GIANT_LEAVE(d);
2192
2193 return (ret);
2194 }
2195
2196 static int
2197 dsp_mmap(struct cdev *i_dev, vm_ooffset_t offset, vm_paddr_t *paddr,
2198 int nprot, vm_memattr_t *memattr)
2199 {
2200
2201 /* XXX memattr is not honored */
2202 *paddr = vtophys(offset);
2203 return (0);
2204 }
2205
2206 static int
2207 dsp_mmap_single(struct cdev *i_dev, vm_ooffset_t *offset,
2208 vm_size_t size, struct vm_object **object, int nprot)
2209 {
2210 struct snddev_info *d;
2211 struct pcm_channel *wrch, *rdch, *c;
2212
2213 /*
2214 * Reject PROT_EXEC by default. It just doesn't makes sense.
2215 * Unfortunately, we have to give up this one due to linux_mmap
2216 * changes.
2217 *
2218 * http://lists.freebsd.org/pipermail/freebsd-emulation/2007-June/003698.html
2219 *
2220 */
2221 #ifdef SV_ABI_LINUX
2222 if ((nprot & PROT_EXEC) && (dsp_mmap_allow_prot_exec < 0 ||
2223 (dsp_mmap_allow_prot_exec == 0 &&
2224 SV_CURPROC_ABI() != SV_ABI_LINUX)))
2225 #else
2226 if ((nprot & PROT_EXEC) && dsp_mmap_allow_prot_exec < 1)
2227 #endif
2228 return (EINVAL);
2229
2230 /*
2231 * PROT_READ (alone) selects the input buffer.
2232 * PROT_WRITE (alone) selects the output buffer.
2233 * PROT_WRITE|PROT_READ together select the output buffer.
2234 */
2235 if ((nprot & (PROT_READ | PROT_WRITE)) == 0)
2236 return (EINVAL);
2237
2238 d = dsp_get_info(i_dev);
2239 if (!DSP_REGISTERED(d, i_dev))
2240 return (EINVAL);
2241
2242 PCM_GIANT_ENTER(d);
2243
2244 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
2245
2246 c = ((nprot & PROT_WRITE) != 0) ? wrch : rdch;
2247 if (c == NULL || (c->flags & CHN_F_MMAP_INVALID) ||
2248 (*offset + size) > sndbuf_getsize(c->bufsoft) ||
2249 (wrch != NULL && (wrch->flags & CHN_F_MMAP_INVALID)) ||
2250 (rdch != NULL && (rdch->flags & CHN_F_MMAP_INVALID))) {
2251 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
2252 PCM_GIANT_EXIT(d);
2253 return (EINVAL);
2254 }
2255
2256 if (wrch != NULL)
2257 wrch->flags |= CHN_F_MMAP;
2258 if (rdch != NULL)
2259 rdch->flags |= CHN_F_MMAP;
2260
2261 *offset = (uintptr_t)sndbuf_getbufofs(c->bufsoft, *offset);
2262 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
2263 *object = vm_pager_allocate(OBJT_DEVICE, i_dev,
2264 size, nprot, *offset, curthread->td_ucred);
2265
2266 PCM_GIANT_LEAVE(d);
2267
2268 if (*object == NULL)
2269 return (EINVAL);
2270 return (0);
2271 }
2272
2273 /* So much for dev_stdclone() */
2274 static int
2275 dsp_stdclone(char *name, char *namep, char *sep, int use_sep, int *u, int *c)
2276 {
2277 size_t len;
2278
2279 len = strlen(namep);
2280
2281 if (bcmp(name, namep, len) != 0)
2282 return (ENODEV);
2283
2284 name += len;
2285
2286 if (isdigit(*name) == 0)
2287 return (ENODEV);
2288
2289 len = strlen(sep);
2290
2291 if (*name == '' && !(name[1] == '\0' || bcmp(name + 1, sep, len) == 0))
2292 return (ENODEV);
2293
2294 for (*u = 0; isdigit(*name) != 0; name++) {
2295 *u *= 10;
2296 *u += *name - '';
2297 if (*u > dsp_umax)
2298 return (ENODEV);
2299 }
2300
2301 if (*name == '\0')
2302 return ((use_sep == 0) ? 0 : ENODEV);
2303
2304 if (bcmp(name, sep, len) != 0 || isdigit(name[len]) == 0)
2305 return (ENODEV);
2306
2307 name += len;
2308
2309 if (*name == '' && name[1] != '\0')
2310 return (ENODEV);
2311
2312 for (*c = 0; isdigit(*name) != 0; name++) {
2313 *c *= 10;
2314 *c += *name - '';
2315 if (*c > dsp_cmax)
2316 return (ENODEV);
2317 }
2318
2319 if (*name != '\0')
2320 return (ENODEV);
2321
2322 return (0);
2323 }
2324
2325 static void
2326 dsp_clone(void *arg,
2327 #if __FreeBSD_version >= 600034
2328 struct ucred *cred,
2329 #endif
2330 char *name, int namelen, struct cdev **dev)
2331 {
2332 struct snddev_info *d;
2333 struct snd_clone_entry *ce;
2334 struct pcm_channel *c;
2335 int i, unit, udcmask, cunit, devtype, devhw, devcmax, tumax;
2336 char *devname, *devcmp, *devsep;
2337
2338 KASSERT(dsp_umax >= 0 && dsp_cmax >= 0, ("Uninitialized unit!"));
2339
2340 if (*dev != NULL)
2341 return;
2342
2343 unit = -1;
2344 cunit = -1;
2345 devtype = -1;
2346 devhw = 0;
2347 devcmax = -1;
2348 tumax = -1;
2349 devname = NULL;
2350 devsep = NULL;
2351
2352 for (i = 0; unit == -1 &&
2353 i < (sizeof(dsp_cdevs) / sizeof(dsp_cdevs[0])); i++) {
2354 devtype = dsp_cdevs[i].type;
2355 devcmp = dsp_cdevs[i].name;
2356 devsep = dsp_cdevs[i].sep;
2357 devname = dsp_cdevs[i].alias;
2358 if (devname == NULL)
2359 devname = devcmp;
2360 devhw = dsp_cdevs[i].hw;
2361 devcmax = dsp_cdevs[i].max - 1;
2362 if (strcmp(name, devcmp) == 0)
2363 unit = snd_unit;
2364 else if (dsp_stdclone(name, devcmp, devsep,
2365 dsp_cdevs[i].use_sep, &unit, &cunit) != 0) {
2366 unit = -1;
2367 cunit = -1;
2368 }
2369 }
2370
2371 d = devclass_get_softc(pcm_devclass, unit);
2372 if (!PCM_REGISTERED(d) || d->clones == NULL)
2373 return;
2374
2375 /* XXX Need Giant magic entry ??? */
2376
2377 PCM_LOCK(d);
2378 if (snd_clone_disabled(d->clones)) {
2379 PCM_UNLOCK(d);
2380 return;
2381 }
2382
2383 PCM_WAIT(d);
2384 PCM_ACQUIRE(d);
2385 PCM_UNLOCK(d);
2386
2387 udcmask = snd_u2unit(unit) | snd_d2unit(devtype);
2388
2389 if (devhw != 0) {
2390 KASSERT(devcmax <= dsp_cmax,
2391 ("overflow: devcmax=%d, dsp_cmax=%d", devcmax, dsp_cmax));
2392 if (cunit > devcmax) {
2393 PCM_RELEASE_QUICK(d);
2394 return;
2395 }
2396 udcmask |= snd_c2unit(cunit);
2397 CHN_FOREACH(c, d, channels.pcm) {
2398 CHN_LOCK(c);
2399 if (c->unit != udcmask) {
2400 CHN_UNLOCK(c);
2401 continue;
2402 }
2403 CHN_UNLOCK(c);
2404 udcmask &= ~snd_c2unit(cunit);
2405 /*
2406 * Temporarily increase clone maxunit to overcome
2407 * vchan flexibility.
2408 *
2409 * # sysctl dev.pcm.0.play.vchans=256
2410 * dev.pcm.0.play.vchans: 1 -> 256
2411 * # cat /dev/zero > /dev/dsp0.vp255 &
2412 * [1] 17296
2413 * # sysctl dev.pcm.0.play.vchans=0
2414 * dev.pcm.0.play.vchans: 256 -> 1
2415 * # fg
2416 * [1] + running cat /dev/zero > /dev/dsp0.vp255
2417 * ^C
2418 * # cat /dev/zero > /dev/dsp0.vp255
2419 * zsh: operation not supported: /dev/dsp0.vp255
2420 */
2421 tumax = snd_clone_getmaxunit(d->clones);
2422 if (cunit > tumax)
2423 snd_clone_setmaxunit(d->clones, cunit);
2424 else
2425 tumax = -1;
2426 goto dsp_clone_alloc;
2427 }
2428 /*
2429 * Ok, so we're requesting unallocated vchan, but still
2430 * within maximum vchan limit.
2431 */
2432 if (((devtype == SND_DEV_DSPHW_VPLAY && d->pvchancount > 0) ||
2433 (devtype == SND_DEV_DSPHW_VREC && d->rvchancount > 0)) &&
2434 cunit < snd_maxautovchans) {
2435 udcmask &= ~snd_c2unit(cunit);
2436 tumax = snd_clone_getmaxunit(d->clones);
2437 if (cunit > tumax)
2438 snd_clone_setmaxunit(d->clones, cunit);
2439 else
2440 tumax = -1;
2441 goto dsp_clone_alloc;
2442 }
2443 PCM_RELEASE_QUICK(d);
2444 return;
2445 }
2446
2447 dsp_clone_alloc:
2448 ce = snd_clone_alloc(d->clones, dev, &cunit, udcmask);
2449 if (tumax != -1)
2450 snd_clone_setmaxunit(d->clones, tumax);
2451 if (ce != NULL) {
2452 udcmask |= snd_c2unit(cunit);
2453 *dev = make_dev(&dsp_cdevsw, PCMMINOR(udcmask),
2454 UID_ROOT, GID_WHEEL, 0666, "%s%d%s%d",
2455 devname, unit, devsep, cunit);
2456 snd_clone_register(ce, *dev);
2457 }
2458
2459 PCM_RELEASE_QUICK(d);
2460
2461 if (*dev != NULL)
2462 dev_ref(*dev);
2463 }
2464
2465 static void
2466 dsp_sysinit(void *p)
2467 {
2468 if (dsp_ehtag != NULL)
2469 return;
2470 /* initialize unit numbering */
2471 snd_unit_init();
2472 dsp_umax = PCMMAXUNIT;
2473 dsp_cmax = PCMMAXCHAN;
2474 dsp_ehtag = EVENTHANDLER_REGISTER(dev_clone, dsp_clone, 0, 1000);
2475 }
2476
2477 static void
2478 dsp_sysuninit(void *p)
2479 {
2480 if (dsp_ehtag == NULL)
2481 return;
2482 EVENTHANDLER_DEREGISTER(dev_clone, dsp_ehtag);
2483 dsp_ehtag = NULL;
2484 }
2485
2486 SYSINIT(dsp_sysinit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysinit, NULL);
2487 SYSUNINIT(dsp_sysuninit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysuninit, NULL);
2488
2489 char *
2490 dsp_unit2name(char *buf, size_t len, int unit)
2491 {
2492 int i, dtype;
2493
2494 KASSERT(buf != NULL && len != 0,
2495 ("bogus buf=%p len=%ju", buf, (uintmax_t)len));
2496
2497 dtype = snd_unit2d(unit);
2498
2499 for (i = 0; i < (sizeof(dsp_cdevs) / sizeof(dsp_cdevs[0])); i++) {
2500 if (dtype != dsp_cdevs[i].type || dsp_cdevs[i].alias != NULL)
2501 continue;
2502 snprintf(buf, len, "%s%d%s%d", dsp_cdevs[i].name,
2503 snd_unit2u(unit), dsp_cdevs[i].sep, snd_unit2c(unit));
2504 return (buf);
2505 }
2506
2507 return (NULL);
2508 }
2509
2510 /**
2511 * @brief Handler for SNDCTL_AUDIOINFO.
2512 *
2513 * Gathers information about the audio device specified in ai->dev. If
2514 * ai->dev == -1, then this function gathers information about the current
2515 * device. If the call comes in on a non-audio device and ai->dev == -1,
2516 * return EINVAL.
2517 *
2518 * This routine is supposed to go practically straight to the hardware,
2519 * getting capabilities directly from the sound card driver, side-stepping
2520 * the intermediate channel interface.
2521 *
2522 * Note, however, that the usefulness of this command is significantly
2523 * decreased when requesting info about any device other than the one serving
2524 * the request. While each snddev_channel refers to a specific device node,
2525 * the converse is *not* true. Currently, when a sound device node is opened,
2526 * the sound subsystem scans for an available audio channel (or channels, if
2527 * opened in read+write) and then assigns them to the si_drv[12] private
2528 * data fields. As a result, any information returned linking a channel to
2529 * a specific character device isn't necessarily accurate.
2530 *
2531 * @note
2532 * Calling threads must not hold any snddev_info or pcm_channel locks.
2533 *
2534 * @param dev device on which the ioctl was issued
2535 * @param ai ioctl request data container
2536 *
2537 * @retval 0 success
2538 * @retval EINVAL ai->dev specifies an invalid device
2539 *
2540 * @todo Verify correctness of Doxygen tags. ;)
2541 */
2542 int
2543 dsp_oss_audioinfo(struct cdev *i_dev, oss_audioinfo *ai)
2544 {
2545 struct pcmchan_caps *caps;
2546 struct pcm_channel *ch;
2547 struct snddev_info *d;
2548 uint32_t fmts;
2549 int i, nchan, *rates, minch, maxch;
2550 char *devname, buf[CHN_NAMELEN];
2551
2552 /*
2553 * If probing the device that received the ioctl, make sure it's a
2554 * DSP device. (Users may use this ioctl with /dev/mixer and
2555 * /dev/midi.)
2556 */
2557 if (ai->dev == -1 && i_dev->si_devsw != &dsp_cdevsw)
2558 return (EINVAL);
2559
2560 ch = NULL;
2561 devname = NULL;
2562 nchan = 0;
2563 bzero(buf, sizeof(buf));
2564
2565 /*
2566 * Search for the requested audio device (channel). Start by
2567 * iterating over pcm devices.
2568 */
2569 for (i = 0; pcm_devclass != NULL &&
2570 i < devclass_get_maxunit(pcm_devclass); i++) {
2571 d = devclass_get_softc(pcm_devclass, i);
2572 if (!PCM_REGISTERED(d))
2573 continue;
2574
2575 /* XXX Need Giant magic entry ??? */
2576
2577 /* See the note in function docblock */
2578 PCM_UNLOCKASSERT(d);
2579 PCM_LOCK(d);
2580
2581 CHN_FOREACH(ch, d, channels.pcm) {
2582 CHN_UNLOCKASSERT(ch);
2583 CHN_LOCK(ch);
2584 if (ai->dev == -1) {
2585 if (DSP_REGISTERED(d, i_dev) &&
2586 (ch == PCM_RDCH(i_dev) || /* record ch */
2587 ch == PCM_WRCH(i_dev))) { /* playback ch */
2588 devname = dsp_unit2name(buf,
2589 sizeof(buf), ch->unit);
2590 }
2591 } else if (ai->dev == nchan) {
2592 devname = dsp_unit2name(buf, sizeof(buf),
2593 ch->unit);
2594 }
2595 if (devname != NULL)
2596 break;
2597 CHN_UNLOCK(ch);
2598 ++nchan;
2599 }
2600
2601 if (devname != NULL) {
2602 /*
2603 * At this point, the following synchronization stuff
2604 * has happened:
2605 * - a specific PCM device is locked.
2606 * - a specific audio channel has been locked, so be
2607 * sure to unlock when exiting;
2608 */
2609
2610 caps = chn_getcaps(ch);
2611
2612 /*
2613 * With all handles collected, zero out the user's
2614 * container and begin filling in its fields.
2615 */
2616 bzero((void *)ai, sizeof(oss_audioinfo));
2617
2618 ai->dev = nchan;
2619 strlcpy(ai->name, ch->name, sizeof(ai->name));
2620
2621 if ((ch->flags & CHN_F_BUSY) == 0)
2622 ai->busy = 0;
2623 else
2624 ai->busy = (ch->direction == PCMDIR_PLAY) ? OPEN_WRITE : OPEN_READ;
2625
2626 /**
2627 * @note
2628 * @c cmd - OSSv4 docs: "Only supported under Linux at
2629 * this moment." Cop-out, I know, but I'll save
2630 * running around in the process table for later.
2631 * Is there a risk of leaking information?
2632 */
2633 ai->pid = ch->pid;
2634
2635 /*
2636 * These flags stolen from SNDCTL_DSP_GETCAPS handler.
2637 * Note, however, that a single channel operates in
2638 * only one direction, so PCM_CAP_DUPLEX is out.
2639 */
2640 /**
2641 * @todo @c SNDCTL_AUDIOINFO::caps - Make drivers keep
2642 * these in pcmchan::caps?
2643 */
2644 ai->caps = PCM_CAP_REALTIME | PCM_CAP_MMAP | PCM_CAP_TRIGGER |
2645 ((ch->direction == PCMDIR_PLAY) ? PCM_CAP_OUTPUT : PCM_CAP_INPUT);
2646
2647 /*
2648 * Collect formats supported @b natively by the
2649 * device. Also determine min/max channels. (I.e.,
2650 * mono, stereo, or both?)
2651 *
2652 * If any channel is stereo, maxch = 2;
2653 * if all channels are stereo, minch = 2, too;
2654 * if any channel is mono, minch = 1;
2655 * and if all channels are mono, maxch = 1.
2656 */
2657 minch = 0;
2658 maxch = 0;
2659 fmts = 0;
2660 for (i = 0; caps->fmtlist[i]; i++) {
2661 fmts |= caps->fmtlist[i];
2662 if (AFMT_CHANNEL(caps->fmtlist[i]) > 1) {
2663 minch = (minch == 0) ? 2 : minch;
2664 maxch = 2;
2665 } else {
2666 minch = 1;
2667 maxch = (maxch == 0) ? 1 : maxch;
2668 }
2669 }
2670
2671 if (ch->direction == PCMDIR_PLAY)
2672 ai->oformats = fmts;
2673 else
2674 ai->iformats = fmts;
2675
2676 /**
2677 * @note
2678 * @c magic - OSSv4 docs: "Reserved for internal use
2679 * by OSS."
2680 *
2681 * @par
2682 * @c card_number - OSSv4 docs: "Number of the sound
2683 * card where this device belongs or -1 if this
2684 * information is not available. Applications
2685 * should normally not use this field for any
2686 * purpose."
2687 */
2688 ai->card_number = -1;
2689 /**
2690 * @todo @c song_name - depends first on
2691 * SNDCTL_[GS]ETSONG @todo @c label - depends
2692 * on SNDCTL_[GS]ETLABEL
2693 * @todo @c port_number - routing information?
2694 */
2695 ai->port_number = -1;
2696 ai->mixer_dev = (d->mixer_dev != NULL) ? PCMUNIT(d->mixer_dev) : -1;
2697 /**
2698 * @note
2699 * @c real_device - OSSv4 docs: "Obsolete."
2700 */
2701 ai->real_device = -1;
2702 strlcpy(ai->devnode, "/dev/", sizeof(ai->devnode));
2703 strlcat(ai->devnode, devname, sizeof(ai->devnode));
2704 ai->enabled = device_is_attached(d->dev) ? 1 : 0;
2705 /**
2706 * @note
2707 * @c flags - OSSv4 docs: "Reserved for future use."
2708 *
2709 * @note
2710 * @c binding - OSSv4 docs: "Reserved for future use."
2711 *
2712 * @todo @c handle - haven't decided how to generate
2713 * this yet; bus, vendor, device IDs?
2714 */
2715 ai->min_rate = caps->minspeed;
2716 ai->max_rate = caps->maxspeed;
2717
2718 ai->min_channels = minch;
2719 ai->max_channels = maxch;
2720
2721 ai->nrates = chn_getrates(ch, &rates);
2722 if (ai->nrates > OSS_MAX_SAMPLE_RATES)
2723 ai->nrates = OSS_MAX_SAMPLE_RATES;
2724
2725 for (i = 0; i < ai->nrates; i++)
2726 ai->rates[i] = rates[i];
2727
2728 ai->next_play_engine = 0;
2729 ai->next_rec_engine = 0;
2730
2731 CHN_UNLOCK(ch);
2732 }
2733
2734 PCM_UNLOCK(d);
2735
2736 if (devname != NULL)
2737 return (0);
2738 }
2739
2740 /* Exhausted the search -- nothing is locked, so return. */
2741 return (EINVAL);
2742 }
2743
2744 /**
2745 * @brief Assigns a PCM channel to a sync group.
2746 *
2747 * Sync groups are used to enable audio operations on multiple devices
2748 * simultaneously. They may be used with any number of devices and may
2749 * span across applications. Devices are added to groups with
2750 * the SNDCTL_DSP_SYNCGROUP ioctl, and operations are triggered with the
2751 * SNDCTL_DSP_SYNCSTART ioctl.
2752 *
2753 * If the @c id field of the @c group parameter is set to zero, then a new
2754 * sync group is created. Otherwise, wrch and rdch (if set) are added to
2755 * the group specified.
2756 *
2757 * @todo As far as memory allocation, should we assume that things are
2758 * okay and allocate with M_WAITOK before acquiring channel locks,
2759 * freeing later if not?
2760 *
2761 * @param wrch output channel associated w/ device (if any)
2762 * @param rdch input channel associated w/ device (if any)
2763 * @param group Sync group parameters
2764 *
2765 * @retval 0 success
2766 * @retval non-zero error to be propagated upstream
2767 */
2768 static int
2769 dsp_oss_syncgroup(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_syncgroup *group)
2770 {
2771 struct pcmchan_syncmember *smrd, *smwr;
2772 struct pcmchan_syncgroup *sg;
2773 int ret, sg_ids[3];
2774
2775 smrd = NULL;
2776 smwr = NULL;
2777 sg = NULL;
2778 ret = 0;
2779
2780 /*
2781 * Free_unr() may sleep, so store released syncgroup IDs until after
2782 * all locks are released.
2783 */
2784 sg_ids[0] = sg_ids[1] = sg_ids[2] = 0;
2785
2786 PCM_SG_LOCK();
2787
2788 /*
2789 * - Insert channel(s) into group's member list.
2790 * - Set CHN_F_NOTRIGGER on channel(s).
2791 * - Stop channel(s).
2792 */
2793
2794 /*
2795 * If device's channels are already mapped to a group, unmap them.
2796 */
2797 if (wrch) {
2798 CHN_LOCK(wrch);
2799 sg_ids[0] = chn_syncdestroy(wrch);
2800 }
2801
2802 if (rdch) {
2803 CHN_LOCK(rdch);
2804 sg_ids[1] = chn_syncdestroy(rdch);
2805 }
2806
2807 /*
2808 * Verify that mode matches character device properites.
2809 * - Bail if PCM_ENABLE_OUTPUT && wrch == NULL.
2810 * - Bail if PCM_ENABLE_INPUT && rdch == NULL.
2811 */
2812 if (((wrch == NULL) && (group->mode & PCM_ENABLE_OUTPUT)) ||
2813 ((rdch == NULL) && (group->mode & PCM_ENABLE_INPUT))) {
2814 ret = EINVAL;
2815 goto out;
2816 }
2817
2818 /*
2819 * An id of zero indicates the user wants to create a new
2820 * syncgroup.
2821 */
2822 if (group->id == 0) {
2823 sg = (struct pcmchan_syncgroup *)malloc(sizeof(*sg), M_DEVBUF, M_NOWAIT);
2824 if (sg != NULL) {
2825 SLIST_INIT(&sg->members);
2826 sg->id = alloc_unr(pcmsg_unrhdr);
2827
2828 group->id = sg->id;
2829 SLIST_INSERT_HEAD(&snd_pcm_syncgroups, sg, link);
2830 } else
2831 ret = ENOMEM;
2832 } else {
2833 SLIST_FOREACH(sg, &snd_pcm_syncgroups, link) {
2834 if (sg->id == group->id)
2835 break;
2836 }
2837 if (sg == NULL)
2838 ret = EINVAL;
2839 }
2840
2841 /* Couldn't create or find a syncgroup. Fail. */
2842 if (sg == NULL)
2843 goto out;
2844
2845 /*
2846 * Allocate a syncmember, assign it and a channel together, and
2847 * insert into syncgroup.
2848 */
2849 if (group->mode & PCM_ENABLE_INPUT) {
2850 smrd = (struct pcmchan_syncmember *)malloc(sizeof(*smrd), M_DEVBUF, M_NOWAIT);
2851 if (smrd == NULL) {
2852 ret = ENOMEM;
2853 goto out;
2854 }
2855
2856 SLIST_INSERT_HEAD(&sg->members, smrd, link);
2857 smrd->parent = sg;
2858 smrd->ch = rdch;
2859
2860 chn_abort(rdch);
2861 rdch->flags |= CHN_F_NOTRIGGER;
2862 rdch->sm = smrd;
2863 }
2864
2865 if (group->mode & PCM_ENABLE_OUTPUT) {
2866 smwr = (struct pcmchan_syncmember *)malloc(sizeof(*smwr), M_DEVBUF, M_NOWAIT);
2867 if (smwr == NULL) {
2868 ret = ENOMEM;
2869 goto out;
2870 }
2871
2872 SLIST_INSERT_HEAD(&sg->members, smwr, link);
2873 smwr->parent = sg;
2874 smwr->ch = wrch;
2875
2876 chn_abort(wrch);
2877 wrch->flags |= CHN_F_NOTRIGGER;
2878 wrch->sm = smwr;
2879 }
2880
2881
2882 out:
2883 if (ret != 0) {
2884 if (smrd != NULL)
2885 free(smrd, M_DEVBUF);
2886 if ((sg != NULL) && SLIST_EMPTY(&sg->members)) {
2887 sg_ids[2] = sg->id;
2888 SLIST_REMOVE(&snd_pcm_syncgroups, sg, pcmchan_syncgroup, link);
2889 free(sg, M_DEVBUF);
2890 }
2891
2892 if (wrch)
2893 wrch->sm = NULL;
2894 if (rdch)
2895 rdch->sm = NULL;
2896 }
2897
2898 if (wrch)
2899 CHN_UNLOCK(wrch);
2900 if (rdch)
2901 CHN_UNLOCK(rdch);
2902
2903 PCM_SG_UNLOCK();
2904
2905 if (sg_ids[0])
2906 free_unr(pcmsg_unrhdr, sg_ids[0]);
2907 if (sg_ids[1])
2908 free_unr(pcmsg_unrhdr, sg_ids[1]);
2909 if (sg_ids[2])
2910 free_unr(pcmsg_unrhdr, sg_ids[2]);
2911
2912 return (ret);
2913 }
2914
2915 /**
2916 * @brief Launch a sync group into action
2917 *
2918 * Sync groups are established via SNDCTL_DSP_SYNCGROUP. This function
2919 * iterates over all members, triggering them along the way.
2920 *
2921 * @note Caller must not hold any channel locks.
2922 *
2923 * @param sg_id sync group identifier
2924 *
2925 * @retval 0 success
2926 * @retval non-zero error worthy of propagating upstream to user
2927 */
2928 static int
2929 dsp_oss_syncstart(int sg_id)
2930 {
2931 struct pcmchan_syncmember *sm, *sm_tmp;
2932 struct pcmchan_syncgroup *sg;
2933 struct pcm_channel *c;
2934 int ret, needlocks;
2935
2936 /* Get the synclists lock */
2937 PCM_SG_LOCK();
2938
2939 do {
2940 ret = 0;
2941 needlocks = 0;
2942
2943 /* Search for syncgroup by ID */
2944 SLIST_FOREACH(sg, &snd_pcm_syncgroups, link) {
2945 if (sg->id == sg_id)
2946 break;
2947 }
2948
2949 /* Return EINVAL if not found */
2950 if (sg == NULL) {
2951 ret = EINVAL;
2952 break;
2953 }
2954
2955 /* Any removals resulting in an empty group should've handled this */
2956 KASSERT(!SLIST_EMPTY(&sg->members), ("found empty syncgroup"));
2957
2958 /*
2959 * Attempt to lock all member channels - if any are already
2960 * locked, unlock those acquired, sleep for a bit, and try
2961 * again.
2962 */
2963 SLIST_FOREACH(sm, &sg->members, link) {
2964 if (CHN_TRYLOCK(sm->ch) == 0) {
2965 int timo = hz * 5/1000;
2966 if (timo < 1)
2967 timo = 1;
2968
2969 /* Release all locked channels so far, retry */
2970 SLIST_FOREACH(sm_tmp, &sg->members, link) {
2971 /* sm is the member already locked */
2972 if (sm == sm_tmp)
2973 break;
2974 CHN_UNLOCK(sm_tmp->ch);
2975 }
2976
2977 /** @todo Is PRIBIO correct/ */
2978 ret = msleep(sm, &snd_pcm_syncgroups_mtx,
2979 PRIBIO | PCATCH, "pcmsg", timo);
2980 if (ret == EINTR || ret == ERESTART)
2981 break;
2982
2983 needlocks = 1;
2984 ret = 0; /* Assumes ret == EAGAIN... */
2985 }
2986 }
2987 } while (needlocks && ret == 0);
2988
2989 /* Proceed only if no errors encountered. */
2990 if (ret == 0) {
2991 /* Launch channels */
2992 while ((sm = SLIST_FIRST(&sg->members)) != NULL) {
2993 SLIST_REMOVE_HEAD(&sg->members, link);
2994
2995 c = sm->ch;
2996 c->sm = NULL;
2997 chn_start(c, 1);
2998 c->flags &= ~CHN_F_NOTRIGGER;
2999 CHN_UNLOCK(c);
3000
3001 free(sm, M_DEVBUF);
3002 }
3003
3004 SLIST_REMOVE(&snd_pcm_syncgroups, sg, pcmchan_syncgroup, link);
3005 free(sg, M_DEVBUF);
3006 }
3007
3008 PCM_SG_UNLOCK();
3009
3010 /*
3011 * Free_unr() may sleep, so be sure to give up the syncgroup lock
3012 * first.
3013 */
3014 if (ret == 0)
3015 free_unr(pcmsg_unrhdr, sg_id);
3016
3017 return (ret);
3018 }
3019
3020 /**
3021 * @brief Handler for SNDCTL_DSP_POLICY
3022 *
3023 * The SNDCTL_DSP_POLICY ioctl is a simpler interface to control fragment
3024 * size and count like with SNDCTL_DSP_SETFRAGMENT. Instead of the user
3025 * specifying those two parameters, s/he simply selects a number from 0..10
3026 * which corresponds to a buffer size. Smaller numbers request smaller
3027 * buffers with lower latencies (at greater overhead from more frequent
3028 * interrupts), while greater numbers behave in the opposite manner.
3029 *
3030 * The 4Front spec states that a value of 5 should be the default. However,
3031 * this implementation deviates slightly by using a linear scale without
3032 * consulting drivers. I.e., even though drivers may have different default
3033 * buffer sizes, a policy argument of 5 will have the same result across
3034 * all drivers.
3035 *
3036 * See http://manuals.opensound.com/developer/SNDCTL_DSP_POLICY.html for
3037 * more information.
3038 *
3039 * @todo When SNDCTL_DSP_COOKEDMODE is supported, it'll be necessary to
3040 * work with hardware drivers directly.
3041 *
3042 * @note PCM channel arguments must not be locked by caller.
3043 *
3044 * @param wrch Pointer to opened playback channel (optional; may be NULL)
3045 * @param rdch " recording channel (optional; may be NULL)
3046 * @param policy Integer from [0:10]
3047 *
3048 * @retval 0 constant (for now)
3049 */
3050 static int
3051 dsp_oss_policy(struct pcm_channel *wrch, struct pcm_channel *rdch, int policy)
3052 {
3053 int ret;
3054
3055 if (policy < CHN_POLICY_MIN || policy > CHN_POLICY_MAX)
3056 return (EIO);
3057
3058 /* Default: success */
3059 ret = 0;
3060
3061 if (rdch) {
3062 CHN_LOCK(rdch);
3063 ret = chn_setlatency(rdch, policy);
3064 CHN_UNLOCK(rdch);
3065 }
3066
3067 if (wrch && ret == 0) {
3068 CHN_LOCK(wrch);
3069 ret = chn_setlatency(wrch, policy);
3070 CHN_UNLOCK(wrch);
3071 }
3072
3073 if (ret)
3074 ret = EIO;
3075
3076 return (ret);
3077 }
3078
3079 /**
3080 * @brief Enable or disable "cooked" mode
3081 *
3082 * This is a handler for @c SNDCTL_DSP_COOKEDMODE. When in cooked mode, which
3083 * is the default, the sound system handles rate and format conversions
3084 * automatically (ex: user writing 11025Hz/8 bit/unsigned but card only
3085 * operates with 44100Hz/16bit/signed samples).
3086 *
3087 * Disabling cooked mode is intended for applications wanting to mmap()
3088 * a sound card's buffer space directly, bypassing the FreeBSD 2-stage
3089 * feeder architecture, presumably to gain as much control over audio
3090 * hardware as possible.
3091 *
3092 * See @c http://manuals.opensound.com/developer/SNDCTL_DSP_COOKEDMODE.html
3093 * for more details.
3094 *
3095 * @param wrch playback channel (optional; may be NULL)
3096 * @param rdch recording channel (optional; may be NULL)
3097 * @param enabled 0 = raw mode, 1 = cooked mode
3098 *
3099 * @retval EINVAL Operation not yet supported.
3100 */
3101 static int
3102 dsp_oss_cookedmode(struct pcm_channel *wrch, struct pcm_channel *rdch, int enabled)
3103 {
3104
3105 /*
3106 * XXX I just don't get it. Why don't they call it
3107 * "BITPERFECT" ~ SNDCTL_DSP_BITPERFECT !?!?.
3108 * This is just plain so confusing, incoherent,
3109 * <insert any non-printable characters here>.
3110 */
3111 if (!(enabled == 1 || enabled == 0))
3112 return (EINVAL);
3113
3114 /*
3115 * I won't give in. I'm inverting its logic here and now.
3116 * Brag all you want, but "BITPERFECT" should be the better
3117 * term here.
3118 */
3119 enabled ^= 0x00000001;
3120
3121 if (wrch != NULL) {
3122 CHN_LOCK(wrch);
3123 wrch->flags &= ~CHN_F_BITPERFECT;
3124 wrch->flags |= (enabled != 0) ? CHN_F_BITPERFECT : 0x00000000;
3125 CHN_UNLOCK(wrch);
3126 }
3127
3128 if (rdch != NULL) {
3129 CHN_LOCK(rdch);
3130 rdch->flags &= ~CHN_F_BITPERFECT;
3131 rdch->flags |= (enabled != 0) ? CHN_F_BITPERFECT : 0x00000000;
3132 CHN_UNLOCK(rdch);
3133 }
3134
3135 return (0);
3136 }
3137
3138 /**
3139 * @brief Retrieve channel interleaving order
3140 *
3141 * This is the handler for @c SNDCTL_DSP_GET_CHNORDER.
3142 *
3143 * See @c http://manuals.opensound.com/developer/SNDCTL_DSP_GET_CHNORDER.html
3144 * for more details.
3145 *
3146 * @note As the ioctl definition is still under construction, FreeBSD
3147 * does not currently support SNDCTL_DSP_GET_CHNORDER.
3148 *
3149 * @param wrch playback channel (optional; may be NULL)
3150 * @param rdch recording channel (optional; may be NULL)
3151 * @param map channel map (result will be stored there)
3152 *
3153 * @retval EINVAL Operation not yet supported.
3154 */
3155 static int
3156 dsp_oss_getchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map)
3157 {
3158 struct pcm_channel *ch;
3159 int ret;
3160
3161 ch = (wrch != NULL) ? wrch : rdch;
3162 if (ch != NULL) {
3163 CHN_LOCK(ch);
3164 ret = chn_oss_getorder(ch, map);
3165 CHN_UNLOCK(ch);
3166 } else
3167 ret = EINVAL;
3168
3169 return (ret);
3170 }
3171
3172 /**
3173 * @brief Specify channel interleaving order
3174 *
3175 * This is the handler for @c SNDCTL_DSP_SET_CHNORDER.
3176 *
3177 * @note As the ioctl definition is still under construction, FreeBSD
3178 * does not currently support @c SNDCTL_DSP_SET_CHNORDER.
3179 *
3180 * @param wrch playback channel (optional; may be NULL)
3181 * @param rdch recording channel (optional; may be NULL)
3182 * @param map channel map
3183 *
3184 * @retval EINVAL Operation not yet supported.
3185 */
3186 static int
3187 dsp_oss_setchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map)
3188 {
3189 int ret;
3190
3191 ret = 0;
3192
3193 if (wrch != NULL) {
3194 CHN_LOCK(wrch);
3195 ret = chn_oss_setorder(wrch, map);
3196 CHN_UNLOCK(wrch);
3197 }
3198
3199 if (ret == 0 && rdch != NULL) {
3200 CHN_LOCK(rdch);
3201 ret = chn_oss_setorder(rdch, map);
3202 CHN_UNLOCK(rdch);
3203 }
3204
3205 return (ret);
3206 }
3207
3208 static int
3209 dsp_oss_getchannelmask(struct pcm_channel *wrch, struct pcm_channel *rdch,
3210 int *mask)
3211 {
3212 struct pcm_channel *ch;
3213 uint32_t chnmask;
3214 int ret;
3215
3216 chnmask = 0;
3217 ch = (wrch != NULL) ? wrch : rdch;
3218
3219 if (ch != NULL) {
3220 CHN_LOCK(ch);
3221 ret = chn_oss_getmask(ch, &chnmask);
3222 CHN_UNLOCK(ch);
3223 } else
3224 ret = EINVAL;
3225
3226 if (ret == 0)
3227 *mask = chnmask;
3228
3229 return (ret);
3230 }
3231
3232 #ifdef OSSV4_EXPERIMENT
3233 /**
3234 * @brief Retrieve an audio device's label
3235 *
3236 * This is a handler for the @c SNDCTL_GETLABEL ioctl.
3237 *
3238 * See @c http://manuals.opensound.com/developer/SNDCTL_GETLABEL.html
3239 * for more details.
3240 *
3241 * From Hannu@4Front: "For example ossxmix (just like some HW mixer
3242 * consoles) can show variable "labels" for certain controls. By default
3243 * the application name (say quake) is shown as the label but
3244 * applications may change the labels themselves."
3245 *
3246 * @note As the ioctl definition is still under construction, FreeBSD
3247 * does not currently support @c SNDCTL_GETLABEL.
3248 *
3249 * @param wrch playback channel (optional; may be NULL)
3250 * @param rdch recording channel (optional; may be NULL)
3251 * @param label label gets copied here
3252 *
3253 * @retval EINVAL Operation not yet supported.
3254 */
3255 static int
3256 dsp_oss_getlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label)
3257 {
3258 return (EINVAL);
3259 }
3260
3261 /**
3262 * @brief Specify an audio device's label
3263 *
3264 * This is a handler for the @c SNDCTL_SETLABEL ioctl. Please see the
3265 * comments for @c dsp_oss_getlabel immediately above.
3266 *
3267 * See @c http://manuals.opensound.com/developer/SNDCTL_GETLABEL.html
3268 * for more details.
3269 *
3270 * @note As the ioctl definition is still under construction, FreeBSD
3271 * does not currently support SNDCTL_SETLABEL.
3272 *
3273 * @param wrch playback channel (optional; may be NULL)
3274 * @param rdch recording channel (optional; may be NULL)
3275 * @param label label gets copied from here
3276 *
3277 * @retval EINVAL Operation not yet supported.
3278 */
3279 static int
3280 dsp_oss_setlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label)
3281 {
3282 return (EINVAL);
3283 }
3284
3285 /**
3286 * @brief Retrieve name of currently played song
3287 *
3288 * This is a handler for the @c SNDCTL_GETSONG ioctl. Audio players could
3289 * tell the system the name of the currently playing song, which would be
3290 * visible in @c /dev/sndstat.
3291 *
3292 * See @c http://manuals.opensound.com/developer/SNDCTL_GETSONG.html
3293 * for more details.
3294 *
3295 * @note As the ioctl definition is still under construction, FreeBSD
3296 * does not currently support SNDCTL_GETSONG.
3297 *
3298 * @param wrch playback channel (optional; may be NULL)
3299 * @param rdch recording channel (optional; may be NULL)
3300 * @param song song name gets copied here
3301 *
3302 * @retval EINVAL Operation not yet supported.
3303 */
3304 static int
3305 dsp_oss_getsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song)
3306 {
3307 return (EINVAL);
3308 }
3309
3310 /**
3311 * @brief Retrieve name of currently played song
3312 *
3313 * This is a handler for the @c SNDCTL_SETSONG ioctl. Audio players could
3314 * tell the system the name of the currently playing song, which would be
3315 * visible in @c /dev/sndstat.
3316 *
3317 * See @c http://manuals.opensound.com/developer/SNDCTL_SETSONG.html
3318 * for more details.
3319 *
3320 * @note As the ioctl definition is still under construction, FreeBSD
3321 * does not currently support SNDCTL_SETSONG.
3322 *
3323 * @param wrch playback channel (optional; may be NULL)
3324 * @param rdch recording channel (optional; may be NULL)
3325 * @param song song name gets copied from here
3326 *
3327 * @retval EINVAL Operation not yet supported.
3328 */
3329 static int
3330 dsp_oss_setsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song)
3331 {
3332 return (EINVAL);
3333 }
3334
3335 /**
3336 * @brief Rename a device
3337 *
3338 * This is a handler for the @c SNDCTL_SETNAME ioctl.
3339 *
3340 * See @c http://manuals.opensound.com/developer/SNDCTL_SETNAME.html for
3341 * more details.
3342 *
3343 * From Hannu@4Front: "This call is used to change the device name
3344 * reported in /dev/sndstat and ossinfo. So instead of using some generic
3345 * 'OSS loopback audio (MIDI) driver' the device may be given a meaningfull
3346 * name depending on the current context (for example 'OSS virtual wave table
3347 * synth' or 'VoIP link to London')."
3348 *
3349 * @note As the ioctl definition is still under construction, FreeBSD
3350 * does not currently support SNDCTL_SETNAME.
3351 *
3352 * @param wrch playback channel (optional; may be NULL)
3353 * @param rdch recording channel (optional; may be NULL)
3354 * @param name new device name gets copied from here
3355 *
3356 * @retval EINVAL Operation not yet supported.
3357 */
3358 static int
3359 dsp_oss_setname(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *name)
3360 {
3361 return (EINVAL);
3362 }
3363 #endif /* !OSSV4_EXPERIMENT */
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