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("$FreeBSD$");
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 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 TUNABLE_INT("hw.snd.basename_clone", &dsp_basename_clone);
56
57 struct dsp_cdevinfo {
58 struct pcm_channel *rdch, *wrch;
59 struct pcm_channel *volch;
60 int busy, simplex;
61 TAILQ_ENTRY(dsp_cdevinfo) link;
62 };
63
64 #define PCM_RDCH(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->rdch)
65 #define PCM_WRCH(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->wrch)
66 #define PCM_VOLCH(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->volch)
67 #define PCM_SIMPLEX(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->simplex)
68
69 #define DSP_CDEVINFO_CACHESIZE 8
70
71 #define DSP_REGISTERED(x, y) (PCM_REGISTERED(x) && \
72 (y) != NULL && (y)->si_drv1 != NULL)
73
74 #define OLDPCM_IOCTL
75
76 static d_open_t dsp_open;
77 static d_close_t dsp_close;
78 static d_read_t dsp_read;
79 static d_write_t dsp_write;
80 static d_ioctl_t dsp_ioctl;
81 static d_poll_t dsp_poll;
82 static d_mmap_t dsp_mmap;
83 static d_mmap_single_t dsp_mmap_single;
84
85 struct cdevsw dsp_cdevsw = {
86 .d_version = D_VERSION,
87 .d_open = dsp_open,
88 .d_close = dsp_close,
89 .d_read = dsp_read,
90 .d_write = dsp_write,
91 .d_ioctl = dsp_ioctl,
92 .d_poll = dsp_poll,
93 .d_mmap = dsp_mmap,
94 .d_mmap_single = dsp_mmap_single,
95 .d_name = "dsp",
96 };
97
98 static eventhandler_tag dsp_ehtag = NULL;
99 static int dsp_umax = -1;
100 static int dsp_cmax = -1;
101
102 static int dsp_oss_syncgroup(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_syncgroup *group);
103 static int dsp_oss_syncstart(int sg_id);
104 static int dsp_oss_policy(struct pcm_channel *wrch, struct pcm_channel *rdch, int policy);
105 static int dsp_oss_cookedmode(struct pcm_channel *wrch, struct pcm_channel *rdch, int enabled);
106 static int dsp_oss_getchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map);
107 static int dsp_oss_setchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map);
108 static int dsp_oss_getchannelmask(struct pcm_channel *wrch, struct pcm_channel *rdch, int *mask);
109 #ifdef OSSV4_EXPERIMENT
110 static int dsp_oss_getlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label);
111 static int dsp_oss_setlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label);
112 static int dsp_oss_getsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song);
113 static int dsp_oss_setsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song);
114 static int dsp_oss_setname(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *name);
115 #endif
116
117 static struct snddev_info *
118 dsp_get_info(struct cdev *dev)
119 {
120 return (devclass_get_softc(pcm_devclass, PCMUNIT(dev)));
121 }
122
123 static uint32_t
124 dsp_get_flags(struct cdev *dev)
125 {
126 device_t bdev;
127
128 bdev = devclass_get_device(pcm_devclass, PCMUNIT(dev));
129
130 return ((bdev != NULL) ? pcm_getflags(bdev) : 0xffffffff);
131 }
132
133 static void
134 dsp_set_flags(struct cdev *dev, uint32_t flags)
135 {
136 device_t bdev;
137
138 bdev = devclass_get_device(pcm_devclass, PCMUNIT(dev));
139
140 if (bdev != NULL)
141 pcm_setflags(bdev, flags);
142 }
143
144 /*
145 * return the channels associated with an open device instance.
146 * lock channels specified.
147 */
148 static int
149 getchns(struct cdev *dev, struct pcm_channel **rdch, struct pcm_channel **wrch,
150 uint32_t prio)
151 {
152 struct snddev_info *d;
153 struct pcm_channel *ch;
154 uint32_t flags;
155
156 if (PCM_SIMPLEX(dev) != 0) {
157 d = dsp_get_info(dev);
158 if (!PCM_REGISTERED(d))
159 return (ENXIO);
160 PCM_LOCK(d);
161 PCM_WAIT(d);
162 PCM_ACQUIRE(d);
163 /*
164 * Note: order is important -
165 * pcm flags -> prio query flags -> wild guess
166 */
167 ch = NULL;
168 flags = dsp_get_flags(dev);
169 if (flags & SD_F_PRIO_WR) {
170 ch = PCM_RDCH(dev);
171 PCM_RDCH(dev) = NULL;
172 } else if (flags & SD_F_PRIO_RD) {
173 ch = PCM_WRCH(dev);
174 PCM_WRCH(dev) = NULL;
175 } else if (prio & SD_F_PRIO_WR) {
176 ch = PCM_RDCH(dev);
177 PCM_RDCH(dev) = NULL;
178 flags |= SD_F_PRIO_WR;
179 } else if (prio & SD_F_PRIO_RD) {
180 ch = PCM_WRCH(dev);
181 PCM_WRCH(dev) = NULL;
182 flags |= SD_F_PRIO_RD;
183 } else if (PCM_WRCH(dev) != NULL) {
184 ch = PCM_RDCH(dev);
185 PCM_RDCH(dev) = NULL;
186 flags |= SD_F_PRIO_WR;
187 } else if (PCM_RDCH(dev) != NULL) {
188 ch = PCM_WRCH(dev);
189 PCM_WRCH(dev) = NULL;
190 flags |= SD_F_PRIO_RD;
191 }
192 PCM_SIMPLEX(dev) = 0;
193 dsp_set_flags(dev, flags);
194 if (ch != NULL) {
195 CHN_LOCK(ch);
196 pcm_chnref(ch, -1);
197 pcm_chnrelease(ch);
198 }
199 PCM_RELEASE(d);
200 PCM_UNLOCK(d);
201 }
202
203 *rdch = PCM_RDCH(dev);
204 *wrch = PCM_WRCH(dev);
205
206 if (*rdch != NULL && (prio & SD_F_PRIO_RD))
207 CHN_LOCK(*rdch);
208 if (*wrch != NULL && (prio & SD_F_PRIO_WR))
209 CHN_LOCK(*wrch);
210
211 return (0);
212 }
213
214 /* unlock specified channels */
215 static void
216 relchns(struct cdev *dev, struct pcm_channel *rdch, struct pcm_channel *wrch,
217 uint32_t prio)
218 {
219 if (wrch != NULL && (prio & SD_F_PRIO_WR))
220 CHN_UNLOCK(wrch);
221 if (rdch != NULL && (prio & SD_F_PRIO_RD))
222 CHN_UNLOCK(rdch);
223 }
224
225 static void
226 dsp_cdevinfo_alloc(struct cdev *dev,
227 struct pcm_channel *rdch, struct pcm_channel *wrch,
228 struct pcm_channel *volch)
229 {
230 struct snddev_info *d;
231 struct dsp_cdevinfo *cdi;
232 int simplex;
233
234 d = dsp_get_info(dev);
235
236 KASSERT(PCM_REGISTERED(d) && dev != NULL && dev->si_drv1 == NULL &&
237 ((rdch == NULL && wrch == NULL) || rdch != wrch),
238 ("bogus %s(), what are you trying to accomplish here?", __func__));
239 PCM_BUSYASSERT(d);
240 PCM_LOCKASSERT(d);
241
242 simplex = (dsp_get_flags(dev) & SD_F_SIMPLEX) ? 1 : 0;
243
244 /*
245 * Scan for free instance entry and put it into the end of list.
246 * Create new one if necessary.
247 */
248 TAILQ_FOREACH(cdi, &d->dsp_cdevinfo_pool, link) {
249 if (cdi->busy != 0)
250 break;
251 cdi->rdch = rdch;
252 cdi->wrch = wrch;
253 cdi->volch = volch;
254 cdi->simplex = simplex;
255 cdi->busy = 1;
256 TAILQ_REMOVE(&d->dsp_cdevinfo_pool, cdi, link);
257 TAILQ_INSERT_TAIL(&d->dsp_cdevinfo_pool, cdi, link);
258 dev->si_drv1 = cdi;
259 return;
260 }
261 PCM_UNLOCK(d);
262 cdi = malloc(sizeof(*cdi), M_DEVBUF, M_WAITOK | M_ZERO);
263 PCM_LOCK(d);
264 cdi->rdch = rdch;
265 cdi->wrch = wrch;
266 cdi->volch = volch;
267 cdi->simplex = simplex;
268 cdi->busy = 1;
269 TAILQ_INSERT_TAIL(&d->dsp_cdevinfo_pool, cdi, link);
270 dev->si_drv1 = cdi;
271 }
272
273 static void
274 dsp_cdevinfo_free(struct cdev *dev)
275 {
276 struct snddev_info *d;
277 struct dsp_cdevinfo *cdi, *tmp;
278 uint32_t flags;
279 int i;
280
281 d = dsp_get_info(dev);
282
283 KASSERT(PCM_REGISTERED(d) && dev != NULL && dev->si_drv1 != NULL &&
284 PCM_RDCH(dev) == NULL && PCM_WRCH(dev) == NULL &&
285 PCM_VOLCH(dev) == NULL,
286 ("bogus %s(), what are you trying to accomplish here?", __func__));
287 PCM_BUSYASSERT(d);
288 PCM_LOCKASSERT(d);
289
290 cdi = dev->si_drv1;
291 dev->si_drv1 = NULL;
292 cdi->rdch = NULL;
293 cdi->wrch = NULL;
294 cdi->volch = NULL;
295 cdi->simplex = 0;
296 cdi->busy = 0;
297
298 /*
299 * Once it is free, move it back to the beginning of list for
300 * faster new entry allocation.
301 */
302 TAILQ_REMOVE(&d->dsp_cdevinfo_pool, cdi, link);
303 TAILQ_INSERT_HEAD(&d->dsp_cdevinfo_pool, cdi, link);
304
305 /*
306 * Scan the list, cache free entries up to DSP_CDEVINFO_CACHESIZE.
307 * Reset simplex flags.
308 */
309 flags = dsp_get_flags(dev) & ~SD_F_PRIO_SET;
310 i = DSP_CDEVINFO_CACHESIZE;
311 TAILQ_FOREACH_SAFE(cdi, &d->dsp_cdevinfo_pool, link, tmp) {
312 if (cdi->busy != 0) {
313 if (cdi->simplex == 0) {
314 if (cdi->rdch != NULL)
315 flags |= SD_F_PRIO_RD;
316 if (cdi->wrch != NULL)
317 flags |= SD_F_PRIO_WR;
318 }
319 } else {
320 if (i == 0) {
321 TAILQ_REMOVE(&d->dsp_cdevinfo_pool, cdi, link);
322 free(cdi, M_DEVBUF);
323 } else
324 i--;
325 }
326 }
327 dsp_set_flags(dev, flags);
328 }
329
330 void
331 dsp_cdevinfo_init(struct snddev_info *d)
332 {
333 struct dsp_cdevinfo *cdi;
334 int i;
335
336 KASSERT(d != NULL, ("NULL snddev_info"));
337 PCM_BUSYASSERT(d);
338 PCM_UNLOCKASSERT(d);
339
340 TAILQ_INIT(&d->dsp_cdevinfo_pool);
341 for (i = 0; i < DSP_CDEVINFO_CACHESIZE; i++) {
342 cdi = malloc(sizeof(*cdi), M_DEVBUF, M_WAITOK | M_ZERO);
343 TAILQ_INSERT_HEAD(&d->dsp_cdevinfo_pool, cdi, link);
344 }
345 }
346
347 void
348 dsp_cdevinfo_flush(struct snddev_info *d)
349 {
350 struct dsp_cdevinfo *cdi, *tmp;
351
352 KASSERT(d != NULL, ("NULL snddev_info"));
353 PCM_BUSYASSERT(d);
354 PCM_UNLOCKASSERT(d);
355
356 cdi = TAILQ_FIRST(&d->dsp_cdevinfo_pool);
357 while (cdi != NULL) {
358 tmp = TAILQ_NEXT(cdi, link);
359 free(cdi, M_DEVBUF);
360 cdi = tmp;
361 }
362 TAILQ_INIT(&d->dsp_cdevinfo_pool);
363 }
364
365 /* duplex / simplex cdev type */
366 enum {
367 DSP_CDEV_TYPE_RDONLY, /* simplex read-only (record) */
368 DSP_CDEV_TYPE_WRONLY, /* simplex write-only (play) */
369 DSP_CDEV_TYPE_RDWR /* duplex read, write, or both */
370 };
371
372 enum {
373 DSP_CDEV_VOLCTL_NONE,
374 DSP_CDEV_VOLCTL_READ,
375 DSP_CDEV_VOLCTL_WRITE
376 };
377
378 #define DSP_F_VALID(x) ((x) & (FREAD | FWRITE))
379 #define DSP_F_DUPLEX(x) (((x) & (FREAD | FWRITE)) == (FREAD | FWRITE))
380 #define DSP_F_SIMPLEX(x) (!DSP_F_DUPLEX(x))
381 #define DSP_F_READ(x) ((x) & FREAD)
382 #define DSP_F_WRITE(x) ((x) & FWRITE)
383
384 static const struct {
385 int type;
386 char *name;
387 char *sep;
388 char *alias;
389 int use_sep;
390 int hw;
391 int max;
392 int volctl;
393 uint32_t fmt, spd;
394 int query;
395 } dsp_cdevs[] = {
396 { SND_DEV_DSP, "dsp", ".", NULL, 0, 0, 0, 0,
397 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
398 DSP_CDEV_TYPE_RDWR },
399 { SND_DEV_AUDIO, "audio", ".", NULL, 0, 0, 0, 0,
400 SND_FORMAT(AFMT_MU_LAW, 1, 0), DSP_DEFAULT_SPEED,
401 DSP_CDEV_TYPE_RDWR },
402 { SND_DEV_DSP16, "dspW", ".", NULL, 0, 0, 0, 0,
403 SND_FORMAT(AFMT_S16_LE, 1, 0), DSP_DEFAULT_SPEED,
404 DSP_CDEV_TYPE_RDWR },
405 { SND_DEV_DSPHW_PLAY, "dsp", ".p", NULL, 1, 1, SND_MAXHWCHAN, 1,
406 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_WRONLY },
407 { SND_DEV_DSPHW_VPLAY, "dsp", ".vp", NULL, 1, 1, SND_MAXVCHANS, 1,
408 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_WRONLY },
409 { SND_DEV_DSPHW_REC, "dsp", ".r", NULL, 1, 1, SND_MAXHWCHAN, 1,
410 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_RDONLY },
411 { SND_DEV_DSPHW_VREC, "dsp", ".vr", NULL, 1, 1, SND_MAXVCHANS, 1,
412 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_RDONLY },
413 { SND_DEV_DSPHW_CD, "dspcd", ".", NULL, 0, 0, 0, 0,
414 SND_FORMAT(AFMT_S16_LE, 2, 0), 44100, DSP_CDEV_TYPE_RDWR },
415 /* Low priority, OSSv4 aliases. */
416 { SND_DEV_DSP, "dsp_ac3", ".", "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_mmap", ".", "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_multich", ".", "dsp", 0, 0, 0, 0,
423 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
424 DSP_CDEV_TYPE_RDWR },
425 { SND_DEV_DSP, "dsp_spdifout", ".", "dsp", 0, 0, 0, 0,
426 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
427 DSP_CDEV_TYPE_RDWR },
428 { SND_DEV_DSP, "dsp_spdifin", ".", "dsp", 0, 0, 0, 0,
429 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
430 DSP_CDEV_TYPE_RDWR },
431 };
432
433 #define DSP_FIXUP_ERROR() do { \
434 prio = dsp_get_flags(i_dev); \
435 if (!DSP_F_VALID(flags)) \
436 error = EINVAL; \
437 if (!DSP_F_DUPLEX(flags) && \
438 ((DSP_F_READ(flags) && d->reccount == 0) || \
439 (DSP_F_WRITE(flags) && d->playcount == 0))) \
440 error = ENOTSUP; \
441 else if (!DSP_F_DUPLEX(flags) && (prio & SD_F_SIMPLEX) && \
442 ((DSP_F_READ(flags) && (prio & SD_F_PRIO_WR)) || \
443 (DSP_F_WRITE(flags) && (prio & SD_F_PRIO_RD)))) \
444 error = EBUSY; \
445 else if (DSP_REGISTERED(d, i_dev)) \
446 error = EBUSY; \
447 } while (0)
448
449 static int
450 dsp_open(struct cdev *i_dev, int flags, int mode, struct thread *td)
451 {
452 struct pcm_channel *rdch, *wrch;
453 struct snddev_info *d;
454 uint32_t fmt, spd, prio, volctl;
455 int i, error, rderror, wrerror, devtype, wdevunit, rdevunit;
456
457 /* Kind of impossible.. */
458 if (i_dev == NULL || td == NULL)
459 return (ENODEV);
460
461 d = dsp_get_info(i_dev);
462 if (PCM_DETACHING(d) || !PCM_REGISTERED(d))
463 return (EBADF);
464
465 PCM_GIANT_ENTER(d);
466
467 /* Lock snddev so nobody else can monkey with it. */
468 PCM_LOCK(d);
469 PCM_WAIT(d);
470
471 /*
472 * Try to acquire cloned device before someone else pick it.
473 * ENODEV means this is not a cloned droids.
474 */
475 error = snd_clone_acquire(i_dev);
476 if (!(error == 0 || error == ENODEV)) {
477 DSP_FIXUP_ERROR();
478 PCM_UNLOCK(d);
479 PCM_GIANT_EXIT(d);
480 return (error);
481 }
482
483 error = 0;
484 DSP_FIXUP_ERROR();
485
486 if (error != 0) {
487 (void)snd_clone_release(i_dev);
488 PCM_UNLOCK(d);
489 PCM_GIANT_EXIT(d);
490 return (error);
491 }
492
493 /*
494 * That is just enough. Acquire and unlock pcm lock so
495 * the other will just have to wait until we finish doing
496 * everything.
497 */
498 PCM_ACQUIRE(d);
499 PCM_UNLOCK(d);
500
501 devtype = PCMDEV(i_dev);
502 wdevunit = -1;
503 rdevunit = -1;
504 fmt = 0;
505 spd = 0;
506 volctl = DSP_CDEV_VOLCTL_NONE;
507
508 for (i = 0; i < (sizeof(dsp_cdevs) / sizeof(dsp_cdevs[0])); i++) {
509 if (devtype != dsp_cdevs[i].type || dsp_cdevs[i].alias != NULL)
510 continue;
511 /*
512 * Volume control only valid for DSPHW devices,
513 * and it must be opened in opposite direction be it
514 * simplex or duplex. Anything else will be handled
515 * as usual.
516 */
517 if (dsp_cdevs[i].query == DSP_CDEV_TYPE_WRONLY) {
518 if (dsp_cdevs[i].volctl != 0 &&
519 DSP_F_READ(flags)) {
520 volctl = DSP_CDEV_VOLCTL_WRITE;
521 flags &= ~FREAD;
522 flags |= FWRITE;
523 }
524 if (DSP_F_READ(flags)) {
525 (void)snd_clone_release(i_dev);
526 PCM_RELEASE_QUICK(d);
527 PCM_GIANT_EXIT(d);
528 return (ENOTSUP);
529 }
530 wdevunit = dev2unit(i_dev);
531 } else if (dsp_cdevs[i].query == DSP_CDEV_TYPE_RDONLY) {
532 if (dsp_cdevs[i].volctl != 0 &&
533 DSP_F_WRITE(flags)) {
534 volctl = DSP_CDEV_VOLCTL_READ;
535 flags &= ~FWRITE;
536 flags |= FREAD;
537 }
538 if (DSP_F_WRITE(flags)) {
539 (void)snd_clone_release(i_dev);
540 PCM_RELEASE_QUICK(d);
541 PCM_GIANT_EXIT(d);
542 return (ENOTSUP);
543 }
544 rdevunit = dev2unit(i_dev);
545 }
546 fmt = dsp_cdevs[i].fmt;
547 spd = dsp_cdevs[i].spd;
548 break;
549 }
550
551 /* No matching devtype? */
552 if (fmt == 0 || spd == 0)
553 panic("impossible devtype %d", devtype);
554
555 rdch = NULL;
556 wrch = NULL;
557 rderror = 0;
558 wrerror = 0;
559
560 /*
561 * if we get here, the open request is valid- either:
562 * * we were previously not open
563 * * we were open for play xor record and the opener wants
564 * the non-open direction
565 */
566 if (DSP_F_READ(flags)) {
567 /* open for read */
568 rderror = pcm_chnalloc(d, &rdch, PCMDIR_REC,
569 td->td_proc->p_pid, td->td_proc->p_comm, rdevunit);
570
571 if (rderror == 0 && chn_reset(rdch, fmt, spd) != 0)
572 rderror = ENXIO;
573
574 if (volctl == DSP_CDEV_VOLCTL_READ)
575 rderror = 0;
576
577 if (rderror != 0) {
578 if (rdch != NULL)
579 pcm_chnrelease(rdch);
580 if (!DSP_F_DUPLEX(flags)) {
581 (void)snd_clone_release(i_dev);
582 PCM_RELEASE_QUICK(d);
583 PCM_GIANT_EXIT(d);
584 return (rderror);
585 }
586 rdch = NULL;
587 } else if (volctl == DSP_CDEV_VOLCTL_READ) {
588 if (rdch != NULL) {
589 pcm_chnref(rdch, 1);
590 pcm_chnrelease(rdch);
591 }
592 } else {
593 if (flags & O_NONBLOCK)
594 rdch->flags |= CHN_F_NBIO;
595 if (flags & O_EXCL)
596 rdch->flags |= CHN_F_EXCLUSIVE;
597 pcm_chnref(rdch, 1);
598 if (volctl == DSP_CDEV_VOLCTL_NONE)
599 chn_vpc_reset(rdch, SND_VOL_C_PCM, 0);
600 CHN_UNLOCK(rdch);
601 }
602 }
603
604 if (DSP_F_WRITE(flags)) {
605 /* open for write */
606 wrerror = pcm_chnalloc(d, &wrch, PCMDIR_PLAY,
607 td->td_proc->p_pid, td->td_proc->p_comm, wdevunit);
608
609 if (wrerror == 0 && chn_reset(wrch, fmt, spd) != 0)
610 wrerror = ENXIO;
611
612 if (volctl == DSP_CDEV_VOLCTL_WRITE)
613 wrerror = 0;
614
615 if (wrerror != 0) {
616 if (wrch != NULL)
617 pcm_chnrelease(wrch);
618 if (!DSP_F_DUPLEX(flags)) {
619 if (rdch != NULL) {
620 /*
621 * Lock, deref and release previously
622 * created record channel
623 */
624 CHN_LOCK(rdch);
625 pcm_chnref(rdch, -1);
626 pcm_chnrelease(rdch);
627 }
628 (void)snd_clone_release(i_dev);
629 PCM_RELEASE_QUICK(d);
630 PCM_GIANT_EXIT(d);
631 return (wrerror);
632 }
633 wrch = NULL;
634 } else if (volctl == DSP_CDEV_VOLCTL_WRITE) {
635 if (wrch != NULL) {
636 pcm_chnref(wrch, 1);
637 pcm_chnrelease(wrch);
638 }
639 } else {
640 if (flags & O_NONBLOCK)
641 wrch->flags |= CHN_F_NBIO;
642 if (flags & O_EXCL)
643 wrch->flags |= CHN_F_EXCLUSIVE;
644 pcm_chnref(wrch, 1);
645 if (volctl == DSP_CDEV_VOLCTL_NONE)
646 chn_vpc_reset(wrch, SND_VOL_C_PCM, 0);
647 CHN_UNLOCK(wrch);
648 }
649 }
650
651
652 PCM_LOCK(d);
653
654 /*
655 * We're done. Allocate channels information for this cdev.
656 */
657 switch (volctl) {
658 case DSP_CDEV_VOLCTL_READ:
659 KASSERT(wrch == NULL, ("wrch=%p not null!", wrch));
660 dsp_cdevinfo_alloc(i_dev, NULL, NULL, rdch);
661 break;
662 case DSP_CDEV_VOLCTL_WRITE:
663 KASSERT(rdch == NULL, ("rdch=%p not null!", rdch));
664 dsp_cdevinfo_alloc(i_dev, NULL, NULL, wrch);
665 break;
666 case DSP_CDEV_VOLCTL_NONE:
667 default:
668 if (wrch == NULL && rdch == NULL) {
669 (void)snd_clone_release(i_dev);
670 PCM_RELEASE(d);
671 PCM_UNLOCK(d);
672 PCM_GIANT_EXIT(d);
673 if (wrerror != 0)
674 return (wrerror);
675 if (rderror != 0)
676 return (rderror);
677 return (EINVAL);
678 }
679 dsp_cdevinfo_alloc(i_dev, rdch, wrch, NULL);
680 if (rdch != NULL)
681 CHN_INSERT_HEAD(d, rdch, channels.pcm.opened);
682 if (wrch != NULL)
683 CHN_INSERT_HEAD(d, wrch, channels.pcm.opened);
684 break;
685 }
686
687 /*
688 * Increase clone refcount for its automatic garbage collector.
689 */
690 (void)snd_clone_ref(i_dev);
691
692 PCM_RELEASE(d);
693 PCM_UNLOCK(d);
694
695 PCM_GIANT_LEAVE(d);
696
697 return (0);
698 }
699
700 static int
701 dsp_close(struct cdev *i_dev, int flags, int mode, struct thread *td)
702 {
703 struct pcm_channel *rdch, *wrch, *volch;
704 struct snddev_info *d;
705 int sg_ids, rdref, wdref;
706
707 d = dsp_get_info(i_dev);
708 if (!DSP_REGISTERED(d, i_dev))
709 return (EBADF);
710
711 PCM_GIANT_ENTER(d);
712
713 PCM_LOCK(d);
714 PCM_WAIT(d);
715 PCM_ACQUIRE(d);
716
717 rdch = PCM_RDCH(i_dev);
718 wrch = PCM_WRCH(i_dev);
719 volch = PCM_VOLCH(i_dev);
720
721 PCM_RDCH(i_dev) = NULL;
722 PCM_WRCH(i_dev) = NULL;
723 PCM_VOLCH(i_dev) = NULL;
724
725 rdref = -1;
726 wdref = -1;
727
728 if (volch != NULL) {
729 if (volch == rdch)
730 rdref--;
731 else if (volch == wrch)
732 wdref--;
733 else {
734 CHN_LOCK(volch);
735 pcm_chnref(volch, -1);
736 CHN_UNLOCK(volch);
737 }
738 }
739
740 if (rdch != NULL)
741 CHN_REMOVE(d, rdch, channels.pcm.opened);
742 if (wrch != NULL)
743 CHN_REMOVE(d, wrch, channels.pcm.opened);
744
745 if (rdch != NULL || wrch != NULL) {
746 PCM_UNLOCK(d);
747 if (rdch != NULL) {
748 /*
749 * The channel itself need not be locked because:
750 * a) Adding a channel to a syncgroup happens only
751 * in dsp_ioctl(), which cannot run concurrently
752 * to dsp_close().
753 * b) The syncmember pointer (sm) is protected by
754 * the global syncgroup list lock.
755 * c) A channel can't just disappear, invalidating
756 * pointers, unless it's closed/dereferenced
757 * first.
758 */
759 PCM_SG_LOCK();
760 sg_ids = chn_syncdestroy(rdch);
761 PCM_SG_UNLOCK();
762 if (sg_ids != 0)
763 free_unr(pcmsg_unrhdr, sg_ids);
764
765 CHN_LOCK(rdch);
766 pcm_chnref(rdch, rdref);
767 chn_abort(rdch); /* won't sleep */
768 rdch->flags &= ~(CHN_F_RUNNING | CHN_F_MMAP |
769 CHN_F_DEAD | CHN_F_EXCLUSIVE);
770 chn_reset(rdch, 0, 0);
771 pcm_chnrelease(rdch);
772 }
773 if (wrch != NULL) {
774 /*
775 * Please see block above.
776 */
777 PCM_SG_LOCK();
778 sg_ids = chn_syncdestroy(wrch);
779 PCM_SG_UNLOCK();
780 if (sg_ids != 0)
781 free_unr(pcmsg_unrhdr, sg_ids);
782
783 CHN_LOCK(wrch);
784 pcm_chnref(wrch, wdref);
785 chn_flush(wrch); /* may sleep */
786 wrch->flags &= ~(CHN_F_RUNNING | CHN_F_MMAP |
787 CHN_F_DEAD | CHN_F_EXCLUSIVE);
788 chn_reset(wrch, 0, 0);
789 pcm_chnrelease(wrch);
790 }
791 PCM_LOCK(d);
792 }
793
794 dsp_cdevinfo_free(i_dev);
795 /*
796 * Release clone busy state and unref it so the automatic
797 * garbage collector will get the hint and do the remaining
798 * cleanup process.
799 */
800 (void)snd_clone_release(i_dev);
801
802 /*
803 * destroy_dev() might sleep, so release pcm lock
804 * here and rely on pcm cv serialization.
805 */
806 PCM_UNLOCK(d);
807 (void)snd_clone_unref(i_dev);
808 PCM_LOCK(d);
809
810 PCM_RELEASE(d);
811 PCM_UNLOCK(d);
812
813 PCM_GIANT_LEAVE(d);
814
815 return (0);
816 }
817
818 static __inline int
819 dsp_io_ops(struct cdev *i_dev, struct uio *buf)
820 {
821 struct snddev_info *d;
822 struct pcm_channel **ch, *rdch, *wrch;
823 int (*chn_io)(struct pcm_channel *, struct uio *);
824 int prio, ret;
825 pid_t runpid;
826
827 KASSERT(i_dev != NULL && buf != NULL &&
828 (buf->uio_rw == UIO_READ || buf->uio_rw == UIO_WRITE),
829 ("%s(): io train wreck!", __func__));
830
831 d = dsp_get_info(i_dev);
832 if (PCM_DETACHING(d) || !DSP_REGISTERED(d, i_dev))
833 return (EBADF);
834
835 PCM_GIANT_ENTER(d);
836
837 switch (buf->uio_rw) {
838 case UIO_READ:
839 prio = SD_F_PRIO_RD;
840 ch = &rdch;
841 chn_io = chn_read;
842 break;
843 case UIO_WRITE:
844 prio = SD_F_PRIO_WR;
845 ch = &wrch;
846 chn_io = chn_write;
847 break;
848 default:
849 panic("invalid/corrupted uio direction: %d", buf->uio_rw);
850 break;
851 }
852
853 rdch = NULL;
854 wrch = NULL;
855 runpid = buf->uio_td->td_proc->p_pid;
856
857 getchns(i_dev, &rdch, &wrch, prio);
858
859 if (*ch == NULL || !((*ch)->flags & CHN_F_BUSY)) {
860 PCM_GIANT_EXIT(d);
861 return (EBADF);
862 }
863
864 if (((*ch)->flags & (CHN_F_MMAP | CHN_F_DEAD)) ||
865 (((*ch)->flags & CHN_F_RUNNING) && (*ch)->pid != runpid)) {
866 relchns(i_dev, rdch, wrch, prio);
867 PCM_GIANT_EXIT(d);
868 return (EINVAL);
869 } else if (!((*ch)->flags & CHN_F_RUNNING)) {
870 (*ch)->flags |= CHN_F_RUNNING;
871 (*ch)->pid = runpid;
872 }
873
874 /*
875 * chn_read/write must give up channel lock in order to copy bytes
876 * from/to userland, so up the "in progress" counter to make sure
877 * someone else doesn't come along and muss up the buffer.
878 */
879 ++(*ch)->inprog;
880 ret = chn_io(*ch, buf);
881 --(*ch)->inprog;
882
883 CHN_BROADCAST(&(*ch)->cv);
884
885 relchns(i_dev, rdch, wrch, prio);
886
887 PCM_GIANT_LEAVE(d);
888
889 return (ret);
890 }
891
892 static int
893 dsp_read(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_write(struct cdev *i_dev, struct uio *buf, int flag)
900 {
901 return (dsp_io_ops(i_dev, buf));
902 }
903
904 static int
905 dsp_get_volume_channel(struct cdev *dev, struct pcm_channel **volch)
906 {
907 struct snddev_info *d;
908 struct pcm_channel *c;
909 int unit;
910
911 KASSERT(dev != NULL && volch != NULL,
912 ("%s(): NULL query dev=%p volch=%p", __func__, dev, volch));
913
914 d = dsp_get_info(dev);
915 if (!PCM_REGISTERED(d)) {
916 *volch = NULL;
917 return (EINVAL);
918 }
919
920 PCM_UNLOCKASSERT(d);
921
922 *volch = NULL;
923
924 c = PCM_VOLCH(dev);
925 if (c != NULL) {
926 if (!(c->feederflags & (1 << FEEDER_VOLUME)))
927 return (-1);
928 *volch = c;
929 return (0);
930 }
931
932 PCM_LOCK(d);
933 PCM_WAIT(d);
934 PCM_ACQUIRE(d);
935
936 unit = dev2unit(dev);
937
938 CHN_FOREACH(c, d, channels.pcm) {
939 CHN_LOCK(c);
940 if (c->unit != unit) {
941 CHN_UNLOCK(c);
942 continue;
943 }
944 *volch = c;
945 pcm_chnref(c, 1);
946 PCM_VOLCH(dev) = c;
947 CHN_UNLOCK(c);
948 PCM_RELEASE(d);
949 PCM_UNLOCK(d);
950 return ((c->feederflags & (1 << FEEDER_VOLUME)) ? 0 : -1);
951 }
952
953 PCM_RELEASE(d);
954 PCM_UNLOCK(d);
955
956 return (EINVAL);
957 }
958
959 static int
960 dsp_ioctl_channel(struct cdev *dev, struct pcm_channel *volch, u_long cmd,
961 caddr_t arg)
962 {
963 struct snddev_info *d;
964 struct pcm_channel *rdch, *wrch;
965 int j, devtype, ret;
966
967 d = dsp_get_info(dev);
968 if (!PCM_REGISTERED(d) || !(dsp_get_flags(dev) & SD_F_VPC))
969 return (-1);
970
971 PCM_UNLOCKASSERT(d);
972
973 j = cmd & 0xff;
974
975 rdch = PCM_RDCH(dev);
976 wrch = PCM_WRCH(dev);
977
978 /* No specific channel, look into cache */
979 if (volch == NULL)
980 volch = PCM_VOLCH(dev);
981
982 /* Look harder */
983 if (volch == NULL) {
984 if (j == SOUND_MIXER_RECLEV && rdch != NULL)
985 volch = rdch;
986 else if (j == SOUND_MIXER_PCM && wrch != NULL)
987 volch = wrch;
988 }
989
990 devtype = PCMDEV(dev);
991
992 /* Look super harder */
993 if (volch == NULL &&
994 (devtype == SND_DEV_DSPHW_PLAY || devtype == SND_DEV_DSPHW_VPLAY ||
995 devtype == SND_DEV_DSPHW_REC || devtype == SND_DEV_DSPHW_VREC)) {
996 ret = dsp_get_volume_channel(dev, &volch);
997 if (ret != 0)
998 return (ret);
999 if (volch == NULL)
1000 return (EINVAL);
1001 }
1002
1003 /* Final validation */
1004 if (volch != NULL) {
1005 CHN_LOCK(volch);
1006 if (!(volch->feederflags & (1 << FEEDER_VOLUME))) {
1007 CHN_UNLOCK(volch);
1008 return (-1);
1009 }
1010 if (volch->direction == PCMDIR_PLAY)
1011 wrch = volch;
1012 else
1013 rdch = volch;
1014 }
1015
1016 ret = EINVAL;
1017
1018 if (volch != NULL &&
1019 ((j == SOUND_MIXER_PCM && volch->direction == PCMDIR_PLAY) ||
1020 (j == SOUND_MIXER_RECLEV && volch->direction == PCMDIR_REC))) {
1021 if ((cmd & ~0xff) == MIXER_WRITE(0)) {
1022 int left, right, center;
1023
1024 left = *(int *)arg & 0x7f;
1025 right = ((*(int *)arg) >> 8) & 0x7f;
1026 center = (left + right) >> 1;
1027 chn_setvolume_multi(volch, SND_VOL_C_PCM, left, right,
1028 center);
1029 } else if ((cmd & ~0xff) == MIXER_READ(0)) {
1030 *(int *)arg = CHN_GETVOLUME(volch,
1031 SND_VOL_C_PCM, SND_CHN_T_FL);
1032 *(int *)arg |= CHN_GETVOLUME(volch,
1033 SND_VOL_C_PCM, SND_CHN_T_FR) << 8;
1034 }
1035 ret = 0;
1036 } else if (rdch != NULL || wrch != NULL) {
1037 switch (j) {
1038 case SOUND_MIXER_DEVMASK:
1039 case SOUND_MIXER_CAPS:
1040 case SOUND_MIXER_STEREODEVS:
1041 if ((cmd & ~0xff) == MIXER_READ(0)) {
1042 *(int *)arg = 0;
1043 if (rdch != NULL)
1044 *(int *)arg |= SOUND_MASK_RECLEV;
1045 if (wrch != NULL)
1046 *(int *)arg |= SOUND_MASK_PCM;
1047 }
1048 ret = 0;
1049 break;
1050 case SOUND_MIXER_RECMASK:
1051 case SOUND_MIXER_RECSRC:
1052 if ((cmd & ~0xff) == MIXER_READ(0))
1053 *(int *)arg = 0;
1054 ret = 0;
1055 break;
1056 default:
1057 break;
1058 }
1059 }
1060
1061 if (volch != NULL)
1062 CHN_UNLOCK(volch);
1063
1064 return (ret);
1065 }
1066
1067 static int
1068 dsp_ioctl(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode,
1069 struct thread *td)
1070 {
1071 struct pcm_channel *chn, *rdch, *wrch;
1072 struct snddev_info *d;
1073 u_long xcmd;
1074 int *arg_i, ret, tmp;
1075
1076 d = dsp_get_info(i_dev);
1077 if (PCM_DETACHING(d) || !DSP_REGISTERED(d, i_dev))
1078 return (EBADF);
1079
1080 PCM_GIANT_ENTER(d);
1081
1082 arg_i = (int *)arg;
1083 ret = 0;
1084 xcmd = 0;
1085 chn = NULL;
1086
1087 if (IOCGROUP(cmd) == 'M') {
1088 if (cmd == OSS_GETVERSION) {
1089 *arg_i = SOUND_VERSION;
1090 PCM_GIANT_EXIT(d);
1091 return (0);
1092 }
1093 ret = dsp_ioctl_channel(i_dev, PCM_VOLCH(i_dev), cmd, arg);
1094 if (ret != -1) {
1095 PCM_GIANT_EXIT(d);
1096 return (ret);
1097 }
1098
1099 if (d->mixer_dev != NULL) {
1100 PCM_ACQUIRE_QUICK(d);
1101 ret = mixer_ioctl_cmd(d->mixer_dev, cmd, arg, -1, td,
1102 MIXER_CMD_DIRECT);
1103 PCM_RELEASE_QUICK(d);
1104 } else
1105 ret = EBADF;
1106
1107 PCM_GIANT_EXIT(d);
1108
1109 return (ret);
1110 }
1111
1112 /*
1113 * Certain ioctls may be made on any type of device (audio, mixer,
1114 * and MIDI). Handle those special cases here.
1115 */
1116 if (IOCGROUP(cmd) == 'X') {
1117 PCM_ACQUIRE_QUICK(d);
1118 switch(cmd) {
1119 case SNDCTL_SYSINFO:
1120 sound_oss_sysinfo((oss_sysinfo *)arg);
1121 break;
1122 case SNDCTL_CARDINFO:
1123 ret = sound_oss_card_info((oss_card_info *)arg);
1124 break;
1125 case SNDCTL_AUDIOINFO:
1126 case SNDCTL_AUDIOINFO_EX:
1127 case SNDCTL_ENGINEINFO:
1128 ret = dsp_oss_audioinfo(i_dev, (oss_audioinfo *)arg);
1129 break;
1130 case SNDCTL_MIXERINFO:
1131 ret = mixer_oss_mixerinfo(i_dev, (oss_mixerinfo *)arg);
1132 break;
1133 default:
1134 ret = EINVAL;
1135 }
1136 PCM_RELEASE_QUICK(d);
1137 PCM_GIANT_EXIT(d);
1138 return (ret);
1139 }
1140
1141 getchns(i_dev, &rdch, &wrch, 0);
1142
1143 if (wrch != NULL && (wrch->flags & CHN_F_DEAD))
1144 wrch = NULL;
1145 if (rdch != NULL && (rdch->flags & CHN_F_DEAD))
1146 rdch = NULL;
1147
1148 if (wrch == NULL && rdch == NULL) {
1149 PCM_GIANT_EXIT(d);
1150 return (EINVAL);
1151 }
1152
1153 switch(cmd) {
1154 #ifdef OLDPCM_IOCTL
1155 /*
1156 * we start with the new ioctl interface.
1157 */
1158 case AIONWRITE: /* how many bytes can write ? */
1159 if (wrch) {
1160 CHN_LOCK(wrch);
1161 /*
1162 if (wrch && wrch->bufhard.dl)
1163 while (chn_wrfeed(wrch) == 0);
1164 */
1165 *arg_i = sndbuf_getfree(wrch->bufsoft);
1166 CHN_UNLOCK(wrch);
1167 } else {
1168 *arg_i = 0;
1169 ret = EINVAL;
1170 }
1171 break;
1172
1173 case AIOSSIZE: /* set the current blocksize */
1174 {
1175 struct snd_size *p = (struct snd_size *)arg;
1176
1177 p->play_size = 0;
1178 p->rec_size = 0;
1179 PCM_ACQUIRE_QUICK(d);
1180 if (wrch) {
1181 CHN_LOCK(wrch);
1182 chn_setblocksize(wrch, 2, p->play_size);
1183 p->play_size = sndbuf_getblksz(wrch->bufsoft);
1184 CHN_UNLOCK(wrch);
1185 }
1186 if (rdch) {
1187 CHN_LOCK(rdch);
1188 chn_setblocksize(rdch, 2, p->rec_size);
1189 p->rec_size = sndbuf_getblksz(rdch->bufsoft);
1190 CHN_UNLOCK(rdch);
1191 }
1192 PCM_RELEASE_QUICK(d);
1193 }
1194 break;
1195 case AIOGSIZE: /* get the current blocksize */
1196 {
1197 struct snd_size *p = (struct snd_size *)arg;
1198
1199 if (wrch) {
1200 CHN_LOCK(wrch);
1201 p->play_size = sndbuf_getblksz(wrch->bufsoft);
1202 CHN_UNLOCK(wrch);
1203 }
1204 if (rdch) {
1205 CHN_LOCK(rdch);
1206 p->rec_size = sndbuf_getblksz(rdch->bufsoft);
1207 CHN_UNLOCK(rdch);
1208 }
1209 }
1210 break;
1211
1212 case AIOSFMT:
1213 case AIOGFMT:
1214 {
1215 snd_chan_param *p = (snd_chan_param *)arg;
1216
1217 if (cmd == AIOSFMT &&
1218 ((p->play_format != 0 && p->play_rate == 0) ||
1219 (p->rec_format != 0 && p->rec_rate == 0))) {
1220 ret = EINVAL;
1221 break;
1222 }
1223 PCM_ACQUIRE_QUICK(d);
1224 if (wrch) {
1225 CHN_LOCK(wrch);
1226 if (cmd == AIOSFMT && p->play_format != 0) {
1227 chn_setformat(wrch,
1228 SND_FORMAT(p->play_format,
1229 AFMT_CHANNEL(wrch->format),
1230 AFMT_EXTCHANNEL(wrch->format)));
1231 chn_setspeed(wrch, p->play_rate);
1232 }
1233 p->play_rate = wrch->speed;
1234 p->play_format = AFMT_ENCODING(wrch->format);
1235 CHN_UNLOCK(wrch);
1236 } else {
1237 p->play_rate = 0;
1238 p->play_format = 0;
1239 }
1240 if (rdch) {
1241 CHN_LOCK(rdch);
1242 if (cmd == AIOSFMT && p->rec_format != 0) {
1243 chn_setformat(rdch,
1244 SND_FORMAT(p->rec_format,
1245 AFMT_CHANNEL(rdch->format),
1246 AFMT_EXTCHANNEL(rdch->format)));
1247 chn_setspeed(rdch, p->rec_rate);
1248 }
1249 p->rec_rate = rdch->speed;
1250 p->rec_format = AFMT_ENCODING(rdch->format);
1251 CHN_UNLOCK(rdch);
1252 } else {
1253 p->rec_rate = 0;
1254 p->rec_format = 0;
1255 }
1256 PCM_RELEASE_QUICK(d);
1257 }
1258 break;
1259
1260 case AIOGCAP: /* get capabilities */
1261 {
1262 snd_capabilities *p = (snd_capabilities *)arg;
1263 struct pcmchan_caps *pcaps = NULL, *rcaps = NULL;
1264 struct cdev *pdev;
1265
1266 PCM_LOCK(d);
1267 if (rdch) {
1268 CHN_LOCK(rdch);
1269 rcaps = chn_getcaps(rdch);
1270 }
1271 if (wrch) {
1272 CHN_LOCK(wrch);
1273 pcaps = chn_getcaps(wrch);
1274 }
1275 p->rate_min = max(rcaps? rcaps->minspeed : 0,
1276 pcaps? pcaps->minspeed : 0);
1277 p->rate_max = min(rcaps? rcaps->maxspeed : 1000000,
1278 pcaps? pcaps->maxspeed : 1000000);
1279 p->bufsize = min(rdch? sndbuf_getsize(rdch->bufsoft) : 1000000,
1280 wrch? sndbuf_getsize(wrch->bufsoft) : 1000000);
1281 /* XXX bad on sb16 */
1282 p->formats = (rdch? chn_getformats(rdch) : 0xffffffff) &
1283 (wrch? chn_getformats(wrch) : 0xffffffff);
1284 if (rdch && wrch)
1285 p->formats |= (dsp_get_flags(i_dev) & SD_F_SIMPLEX)? 0 : AFMT_FULLDUPLEX;
1286 pdev = d->mixer_dev;
1287 p->mixers = 1; /* default: one mixer */
1288 p->inputs = pdev->si_drv1? mix_getdevs(pdev->si_drv1) : 0;
1289 p->left = p->right = 100;
1290 if (wrch)
1291 CHN_UNLOCK(wrch);
1292 if (rdch)
1293 CHN_UNLOCK(rdch);
1294 PCM_UNLOCK(d);
1295 }
1296 break;
1297
1298 case AIOSTOP:
1299 if (*arg_i == AIOSYNC_PLAY && wrch) {
1300 CHN_LOCK(wrch);
1301 *arg_i = chn_abort(wrch);
1302 CHN_UNLOCK(wrch);
1303 } else if (*arg_i == AIOSYNC_CAPTURE && rdch) {
1304 CHN_LOCK(rdch);
1305 *arg_i = chn_abort(rdch);
1306 CHN_UNLOCK(rdch);
1307 } else {
1308 printf("AIOSTOP: bad channel 0x%x\n", *arg_i);
1309 *arg_i = 0;
1310 }
1311 break;
1312
1313 case AIOSYNC:
1314 printf("AIOSYNC chan 0x%03lx pos %lu unimplemented\n",
1315 ((snd_sync_parm *)arg)->chan, ((snd_sync_parm *)arg)->pos);
1316 break;
1317 #endif
1318 /*
1319 * here follow the standard ioctls (filio.h etc.)
1320 */
1321 case FIONREAD: /* get # bytes to read */
1322 if (rdch) {
1323 CHN_LOCK(rdch);
1324 /* if (rdch && rdch->bufhard.dl)
1325 while (chn_rdfeed(rdch) == 0);
1326 */
1327 *arg_i = sndbuf_getready(rdch->bufsoft);
1328 CHN_UNLOCK(rdch);
1329 } else {
1330 *arg_i = 0;
1331 ret = EINVAL;
1332 }
1333 break;
1334
1335 case FIOASYNC: /*set/clear async i/o */
1336 DEB( printf("FIOASYNC\n") ; )
1337 break;
1338
1339 case SNDCTL_DSP_NONBLOCK: /* set non-blocking i/o */
1340 case FIONBIO: /* set/clear non-blocking i/o */
1341 if (rdch) {
1342 CHN_LOCK(rdch);
1343 if (cmd == SNDCTL_DSP_NONBLOCK || *arg_i)
1344 rdch->flags |= CHN_F_NBIO;
1345 else
1346 rdch->flags &= ~CHN_F_NBIO;
1347 CHN_UNLOCK(rdch);
1348 }
1349 if (wrch) {
1350 CHN_LOCK(wrch);
1351 if (cmd == SNDCTL_DSP_NONBLOCK || *arg_i)
1352 wrch->flags |= CHN_F_NBIO;
1353 else
1354 wrch->flags &= ~CHN_F_NBIO;
1355 CHN_UNLOCK(wrch);
1356 }
1357 break;
1358
1359 /*
1360 * Finally, here is the linux-compatible ioctl interface
1361 */
1362 #define THE_REAL_SNDCTL_DSP_GETBLKSIZE _IOWR('P', 4, int)
1363 case THE_REAL_SNDCTL_DSP_GETBLKSIZE:
1364 case SNDCTL_DSP_GETBLKSIZE:
1365 chn = wrch ? wrch : rdch;
1366 if (chn) {
1367 CHN_LOCK(chn);
1368 *arg_i = sndbuf_getblksz(chn->bufsoft);
1369 CHN_UNLOCK(chn);
1370 } else {
1371 *arg_i = 0;
1372 ret = EINVAL;
1373 }
1374 break;
1375
1376 case SNDCTL_DSP_SETBLKSIZE:
1377 RANGE(*arg_i, 16, 65536);
1378 PCM_ACQUIRE_QUICK(d);
1379 if (wrch) {
1380 CHN_LOCK(wrch);
1381 chn_setblocksize(wrch, 2, *arg_i);
1382 CHN_UNLOCK(wrch);
1383 }
1384 if (rdch) {
1385 CHN_LOCK(rdch);
1386 chn_setblocksize(rdch, 2, *arg_i);
1387 CHN_UNLOCK(rdch);
1388 }
1389 PCM_RELEASE_QUICK(d);
1390 break;
1391
1392 case SNDCTL_DSP_RESET:
1393 DEB(printf("dsp reset\n"));
1394 if (wrch) {
1395 CHN_LOCK(wrch);
1396 chn_abort(wrch);
1397 chn_resetbuf(wrch);
1398 CHN_UNLOCK(wrch);
1399 }
1400 if (rdch) {
1401 CHN_LOCK(rdch);
1402 chn_abort(rdch);
1403 chn_resetbuf(rdch);
1404 CHN_UNLOCK(rdch);
1405 }
1406 break;
1407
1408 case SNDCTL_DSP_SYNC:
1409 DEB(printf("dsp sync\n"));
1410 /* chn_sync may sleep */
1411 if (wrch) {
1412 CHN_LOCK(wrch);
1413 chn_sync(wrch, 0);
1414 CHN_UNLOCK(wrch);
1415 }
1416 break;
1417
1418 case SNDCTL_DSP_SPEED:
1419 /* chn_setspeed may sleep */
1420 tmp = 0;
1421 PCM_ACQUIRE_QUICK(d);
1422 if (wrch) {
1423 CHN_LOCK(wrch);
1424 ret = chn_setspeed(wrch, *arg_i);
1425 tmp = wrch->speed;
1426 CHN_UNLOCK(wrch);
1427 }
1428 if (rdch && ret == 0) {
1429 CHN_LOCK(rdch);
1430 ret = chn_setspeed(rdch, *arg_i);
1431 if (tmp == 0)
1432 tmp = rdch->speed;
1433 CHN_UNLOCK(rdch);
1434 }
1435 PCM_RELEASE_QUICK(d);
1436 *arg_i = tmp;
1437 break;
1438
1439 case SOUND_PCM_READ_RATE:
1440 chn = wrch ? wrch : rdch;
1441 if (chn) {
1442 CHN_LOCK(chn);
1443 *arg_i = chn->speed;
1444 CHN_UNLOCK(chn);
1445 } else {
1446 *arg_i = 0;
1447 ret = EINVAL;
1448 }
1449 break;
1450
1451 case SNDCTL_DSP_STEREO:
1452 tmp = -1;
1453 *arg_i = (*arg_i)? 2 : 1;
1454 PCM_ACQUIRE_QUICK(d);
1455 if (wrch) {
1456 CHN_LOCK(wrch);
1457 ret = chn_setformat(wrch,
1458 SND_FORMAT(wrch->format, *arg_i, 0));
1459 tmp = (AFMT_CHANNEL(wrch->format) > 1)? 1 : 0;
1460 CHN_UNLOCK(wrch);
1461 }
1462 if (rdch && ret == 0) {
1463 CHN_LOCK(rdch);
1464 ret = chn_setformat(rdch,
1465 SND_FORMAT(rdch->format, *arg_i, 0));
1466 if (tmp == -1)
1467 tmp = (AFMT_CHANNEL(rdch->format) > 1)? 1 : 0;
1468 CHN_UNLOCK(rdch);
1469 }
1470 PCM_RELEASE_QUICK(d);
1471 *arg_i = tmp;
1472 break;
1473
1474 case SOUND_PCM_WRITE_CHANNELS:
1475 /* case SNDCTL_DSP_CHANNELS: ( == SOUND_PCM_WRITE_CHANNELS) */
1476 if (*arg_i < 0) {
1477 *arg_i = 0;
1478 ret = EINVAL;
1479 break;
1480 }
1481 if (*arg_i != 0) {
1482 struct pcmchan_matrix *m;
1483 uint32_t ext;
1484
1485 tmp = 0;
1486 if (*arg_i > SND_CHN_MAX)
1487 *arg_i = SND_CHN_MAX;
1488
1489 m = feeder_matrix_default_channel_map(*arg_i);
1490 if (m != NULL)
1491 ext = m->ext;
1492 else
1493 ext = 0;
1494
1495 PCM_ACQUIRE_QUICK(d);
1496 if (wrch) {
1497 CHN_LOCK(wrch);
1498 ret = chn_setformat(wrch,
1499 SND_FORMAT(wrch->format, *arg_i, ext));
1500 tmp = AFMT_CHANNEL(wrch->format);
1501 CHN_UNLOCK(wrch);
1502 }
1503 if (rdch && ret == 0) {
1504 CHN_LOCK(rdch);
1505 ret = chn_setformat(rdch,
1506 SND_FORMAT(rdch->format, *arg_i, ext));
1507 if (tmp == 0)
1508 tmp = AFMT_CHANNEL(rdch->format);
1509 CHN_UNLOCK(rdch);
1510 }
1511 PCM_RELEASE_QUICK(d);
1512 *arg_i = tmp;
1513 } else {
1514 chn = wrch ? wrch : rdch;
1515 CHN_LOCK(chn);
1516 *arg_i = AFMT_CHANNEL(chn->format);
1517 CHN_UNLOCK(chn);
1518 }
1519 break;
1520
1521 case SOUND_PCM_READ_CHANNELS:
1522 chn = wrch ? wrch : rdch;
1523 if (chn) {
1524 CHN_LOCK(chn);
1525 *arg_i = AFMT_CHANNEL(chn->format);
1526 CHN_UNLOCK(chn);
1527 } else {
1528 *arg_i = 0;
1529 ret = EINVAL;
1530 }
1531 break;
1532
1533 case SNDCTL_DSP_GETFMTS: /* returns a mask of supported fmts */
1534 chn = wrch ? wrch : rdch;
1535 if (chn) {
1536 CHN_LOCK(chn);
1537 *arg_i = chn_getformats(chn);
1538 CHN_UNLOCK(chn);
1539 } else {
1540 *arg_i = 0;
1541 ret = EINVAL;
1542 }
1543 break;
1544
1545 case SNDCTL_DSP_SETFMT: /* sets _one_ format */
1546 if (*arg_i != AFMT_QUERY) {
1547 tmp = 0;
1548 PCM_ACQUIRE_QUICK(d);
1549 if (wrch) {
1550 CHN_LOCK(wrch);
1551 ret = chn_setformat(wrch, SND_FORMAT(*arg_i,
1552 AFMT_CHANNEL(wrch->format),
1553 AFMT_EXTCHANNEL(wrch->format)));
1554 tmp = wrch->format;
1555 CHN_UNLOCK(wrch);
1556 }
1557 if (rdch && ret == 0) {
1558 CHN_LOCK(rdch);
1559 ret = chn_setformat(rdch, SND_FORMAT(*arg_i,
1560 AFMT_CHANNEL(rdch->format),
1561 AFMT_EXTCHANNEL(rdch->format)));
1562 if (tmp == 0)
1563 tmp = rdch->format;
1564 CHN_UNLOCK(rdch);
1565 }
1566 PCM_RELEASE_QUICK(d);
1567 *arg_i = AFMT_ENCODING(tmp);
1568 } else {
1569 chn = wrch ? wrch : rdch;
1570 CHN_LOCK(chn);
1571 *arg_i = AFMT_ENCODING(chn->format);
1572 CHN_UNLOCK(chn);
1573 }
1574 break;
1575
1576 case SNDCTL_DSP_SETFRAGMENT:
1577 DEB(printf("SNDCTL_DSP_SETFRAGMENT 0x%08x\n", *(int *)arg));
1578 {
1579 uint32_t fragln = (*arg_i) & 0x0000ffff;
1580 uint32_t maxfrags = ((*arg_i) & 0xffff0000) >> 16;
1581 uint32_t fragsz;
1582 uint32_t r_maxfrags, r_fragsz;
1583
1584 RANGE(fragln, 4, 16);
1585 fragsz = 1 << fragln;
1586
1587 if (maxfrags == 0)
1588 maxfrags = CHN_2NDBUFMAXSIZE / fragsz;
1589 if (maxfrags < 2)
1590 maxfrags = 2;
1591 if (maxfrags * fragsz > CHN_2NDBUFMAXSIZE)
1592 maxfrags = CHN_2NDBUFMAXSIZE / fragsz;
1593
1594 DEB(printf("SNDCTL_DSP_SETFRAGMENT %d frags, %d sz\n", maxfrags, fragsz));
1595 PCM_ACQUIRE_QUICK(d);
1596 if (rdch) {
1597 CHN_LOCK(rdch);
1598 ret = chn_setblocksize(rdch, maxfrags, fragsz);
1599 r_maxfrags = sndbuf_getblkcnt(rdch->bufsoft);
1600 r_fragsz = sndbuf_getblksz(rdch->bufsoft);
1601 CHN_UNLOCK(rdch);
1602 } else {
1603 r_maxfrags = maxfrags;
1604 r_fragsz = fragsz;
1605 }
1606 if (wrch && ret == 0) {
1607 CHN_LOCK(wrch);
1608 ret = chn_setblocksize(wrch, maxfrags, fragsz);
1609 maxfrags = sndbuf_getblkcnt(wrch->bufsoft);
1610 fragsz = sndbuf_getblksz(wrch->bufsoft);
1611 CHN_UNLOCK(wrch);
1612 } else { /* use whatever came from the read channel */
1613 maxfrags = r_maxfrags;
1614 fragsz = r_fragsz;
1615 }
1616 PCM_RELEASE_QUICK(d);
1617
1618 fragln = 0;
1619 while (fragsz > 1) {
1620 fragln++;
1621 fragsz >>= 1;
1622 }
1623 *arg_i = (maxfrags << 16) | fragln;
1624 }
1625 break;
1626
1627 case SNDCTL_DSP_GETISPACE:
1628 /* return the size of data available in the input queue */
1629 {
1630 audio_buf_info *a = (audio_buf_info *)arg;
1631 if (rdch) {
1632 struct snd_dbuf *bs = rdch->bufsoft;
1633
1634 CHN_LOCK(rdch);
1635 a->bytes = sndbuf_getready(bs);
1636 a->fragments = a->bytes / sndbuf_getblksz(bs);
1637 a->fragstotal = sndbuf_getblkcnt(bs);
1638 a->fragsize = sndbuf_getblksz(bs);
1639 CHN_UNLOCK(rdch);
1640 } else
1641 ret = EINVAL;
1642 }
1643 break;
1644
1645 case SNDCTL_DSP_GETOSPACE:
1646 /* return space available in the output queue */
1647 {
1648 audio_buf_info *a = (audio_buf_info *)arg;
1649 if (wrch) {
1650 struct snd_dbuf *bs = wrch->bufsoft;
1651
1652 CHN_LOCK(wrch);
1653 /* XXX abusive DMA update: chn_wrupdate(wrch); */
1654 a->bytes = sndbuf_getfree(bs);
1655 a->fragments = a->bytes / sndbuf_getblksz(bs);
1656 a->fragstotal = sndbuf_getblkcnt(bs);
1657 a->fragsize = sndbuf_getblksz(bs);
1658 CHN_UNLOCK(wrch);
1659 } else
1660 ret = EINVAL;
1661 }
1662 break;
1663
1664 case SNDCTL_DSP_GETIPTR:
1665 {
1666 count_info *a = (count_info *)arg;
1667 if (rdch) {
1668 struct snd_dbuf *bs = rdch->bufsoft;
1669
1670 CHN_LOCK(rdch);
1671 /* XXX abusive DMA update: chn_rdupdate(rdch); */
1672 a->bytes = sndbuf_gettotal(bs);
1673 a->blocks = sndbuf_getblocks(bs) - rdch->blocks;
1674 a->ptr = sndbuf_getfreeptr(bs);
1675 rdch->blocks = sndbuf_getblocks(bs);
1676 CHN_UNLOCK(rdch);
1677 } else
1678 ret = EINVAL;
1679 }
1680 break;
1681
1682 case SNDCTL_DSP_GETOPTR:
1683 {
1684 count_info *a = (count_info *)arg;
1685 if (wrch) {
1686 struct snd_dbuf *bs = wrch->bufsoft;
1687
1688 CHN_LOCK(wrch);
1689 /* XXX abusive DMA update: chn_wrupdate(wrch); */
1690 a->bytes = sndbuf_gettotal(bs);
1691 a->blocks = sndbuf_getblocks(bs) - wrch->blocks;
1692 a->ptr = sndbuf_getreadyptr(bs);
1693 wrch->blocks = sndbuf_getblocks(bs);
1694 CHN_UNLOCK(wrch);
1695 } else
1696 ret = EINVAL;
1697 }
1698 break;
1699
1700 case SNDCTL_DSP_GETCAPS:
1701 PCM_LOCK(d);
1702 *arg_i = PCM_CAP_REALTIME | PCM_CAP_MMAP | PCM_CAP_TRIGGER;
1703 if (rdch && wrch && !(dsp_get_flags(i_dev) & SD_F_SIMPLEX))
1704 *arg_i |= PCM_CAP_DUPLEX;
1705 PCM_UNLOCK(d);
1706 break;
1707
1708 case SOUND_PCM_READ_BITS:
1709 chn = wrch ? wrch : rdch;
1710 if (chn) {
1711 CHN_LOCK(chn);
1712 if (chn->format & AFMT_8BIT)
1713 *arg_i = 8;
1714 else if (chn->format & AFMT_16BIT)
1715 *arg_i = 16;
1716 else if (chn->format & AFMT_24BIT)
1717 *arg_i = 24;
1718 else if (chn->format & AFMT_32BIT)
1719 *arg_i = 32;
1720 else
1721 ret = EINVAL;
1722 CHN_UNLOCK(chn);
1723 } else {
1724 *arg_i = 0;
1725 ret = EINVAL;
1726 }
1727 break;
1728
1729 case SNDCTL_DSP_SETTRIGGER:
1730 if (rdch) {
1731 CHN_LOCK(rdch);
1732 rdch->flags &= ~CHN_F_NOTRIGGER;
1733 if (*arg_i & PCM_ENABLE_INPUT)
1734 chn_start(rdch, 1);
1735 else {
1736 chn_abort(rdch);
1737 chn_resetbuf(rdch);
1738 rdch->flags |= CHN_F_NOTRIGGER;
1739 }
1740 CHN_UNLOCK(rdch);
1741 }
1742 if (wrch) {
1743 CHN_LOCK(wrch);
1744 wrch->flags &= ~CHN_F_NOTRIGGER;
1745 if (*arg_i & PCM_ENABLE_OUTPUT)
1746 chn_start(wrch, 1);
1747 else {
1748 chn_abort(wrch);
1749 chn_resetbuf(wrch);
1750 wrch->flags |= CHN_F_NOTRIGGER;
1751 }
1752 CHN_UNLOCK(wrch);
1753 }
1754 break;
1755
1756 case SNDCTL_DSP_GETTRIGGER:
1757 *arg_i = 0;
1758 if (wrch) {
1759 CHN_LOCK(wrch);
1760 if (wrch->flags & CHN_F_TRIGGERED)
1761 *arg_i |= PCM_ENABLE_OUTPUT;
1762 CHN_UNLOCK(wrch);
1763 }
1764 if (rdch) {
1765 CHN_LOCK(rdch);
1766 if (rdch->flags & CHN_F_TRIGGERED)
1767 *arg_i |= PCM_ENABLE_INPUT;
1768 CHN_UNLOCK(rdch);
1769 }
1770 break;
1771
1772 case SNDCTL_DSP_GETODELAY:
1773 if (wrch) {
1774 struct snd_dbuf *bs = wrch->bufsoft;
1775
1776 CHN_LOCK(wrch);
1777 /* XXX abusive DMA update: chn_wrupdate(wrch); */
1778 *arg_i = sndbuf_getready(bs);
1779 CHN_UNLOCK(wrch);
1780 } else
1781 ret = EINVAL;
1782 break;
1783
1784 case SNDCTL_DSP_POST:
1785 if (wrch) {
1786 CHN_LOCK(wrch);
1787 wrch->flags &= ~CHN_F_NOTRIGGER;
1788 chn_start(wrch, 1);
1789 CHN_UNLOCK(wrch);
1790 }
1791 break;
1792
1793 case SNDCTL_DSP_SETDUPLEX:
1794 /*
1795 * switch to full-duplex mode if card is in half-duplex
1796 * mode and is able to work in full-duplex mode
1797 */
1798 PCM_LOCK(d);
1799 if (rdch && wrch && (dsp_get_flags(i_dev) & SD_F_SIMPLEX))
1800 dsp_set_flags(i_dev, dsp_get_flags(i_dev)^SD_F_SIMPLEX);
1801 PCM_UNLOCK(d);
1802 break;
1803
1804 /*
1805 * The following four ioctls are simple wrappers around mixer_ioctl
1806 * with no further processing. xcmd is short for "translated
1807 * command".
1808 */
1809 case SNDCTL_DSP_GETRECVOL:
1810 if (xcmd == 0) {
1811 xcmd = SOUND_MIXER_READ_RECLEV;
1812 chn = rdch;
1813 }
1814 /* FALLTHROUGH */
1815 case SNDCTL_DSP_SETRECVOL:
1816 if (xcmd == 0) {
1817 xcmd = SOUND_MIXER_WRITE_RECLEV;
1818 chn = rdch;
1819 }
1820 /* FALLTHROUGH */
1821 case SNDCTL_DSP_GETPLAYVOL:
1822 if (xcmd == 0) {
1823 xcmd = SOUND_MIXER_READ_PCM;
1824 chn = wrch;
1825 }
1826 /* FALLTHROUGH */
1827 case SNDCTL_DSP_SETPLAYVOL:
1828 if (xcmd == 0) {
1829 xcmd = SOUND_MIXER_WRITE_PCM;
1830 chn = wrch;
1831 }
1832
1833 ret = dsp_ioctl_channel(i_dev, chn, xcmd, arg);
1834 if (ret != -1) {
1835 PCM_GIANT_EXIT(d);
1836 return (ret);
1837 }
1838
1839 if (d->mixer_dev != NULL) {
1840 PCM_ACQUIRE_QUICK(d);
1841 ret = mixer_ioctl_cmd(d->mixer_dev, xcmd, arg, -1, td,
1842 MIXER_CMD_DIRECT);
1843 PCM_RELEASE_QUICK(d);
1844 } else
1845 ret = ENOTSUP;
1846
1847 break;
1848
1849 case SNDCTL_DSP_GET_RECSRC_NAMES:
1850 case SNDCTL_DSP_GET_RECSRC:
1851 case SNDCTL_DSP_SET_RECSRC:
1852 if (d->mixer_dev != NULL) {
1853 PCM_ACQUIRE_QUICK(d);
1854 ret = mixer_ioctl_cmd(d->mixer_dev, cmd, arg, -1, td,
1855 MIXER_CMD_DIRECT);
1856 PCM_RELEASE_QUICK(d);
1857 } else
1858 ret = ENOTSUP;
1859 break;
1860
1861 /*
1862 * The following 3 ioctls aren't very useful at the moment. For
1863 * now, only a single channel is associated with a cdev (/dev/dspN
1864 * instance), so there's only a single output routing to use (i.e.,
1865 * the wrch bound to this cdev).
1866 */
1867 case SNDCTL_DSP_GET_PLAYTGT_NAMES:
1868 {
1869 oss_mixer_enuminfo *ei;
1870 ei = (oss_mixer_enuminfo *)arg;
1871 ei->dev = 0;
1872 ei->ctrl = 0;
1873 ei->version = 0; /* static for now */
1874 ei->strindex[0] = 0;
1875
1876 if (wrch != NULL) {
1877 ei->nvalues = 1;
1878 strlcpy(ei->strings, wrch->name,
1879 sizeof(ei->strings));
1880 } else {
1881 ei->nvalues = 0;
1882 ei->strings[0] = '\0';
1883 }
1884 }
1885 break;
1886 case SNDCTL_DSP_GET_PLAYTGT:
1887 case SNDCTL_DSP_SET_PLAYTGT: /* yes, they are the same for now */
1888 /*
1889 * Re: SET_PLAYTGT
1890 * OSSv4: "The value that was accepted by the device will
1891 * be returned back in the variable pointed by the
1892 * argument."
1893 */
1894 if (wrch != NULL)
1895 *arg_i = 0;
1896 else
1897 ret = EINVAL;
1898 break;
1899
1900 case SNDCTL_DSP_SILENCE:
1901 /*
1902 * Flush the software (pre-feed) buffer, but try to minimize playback
1903 * interruption. (I.e., record unplayed samples with intent to
1904 * restore by SNDCTL_DSP_SKIP.) Intended for application "pause"
1905 * functionality.
1906 */
1907 if (wrch == NULL)
1908 ret = EINVAL;
1909 else {
1910 struct snd_dbuf *bs;
1911 CHN_LOCK(wrch);
1912 while (wrch->inprog != 0)
1913 cv_wait(&wrch->cv, wrch->lock);
1914 bs = wrch->bufsoft;
1915 if ((bs->shadbuf != NULL) && (sndbuf_getready(bs) > 0)) {
1916 bs->sl = sndbuf_getready(bs);
1917 sndbuf_dispose(bs, bs->shadbuf, sndbuf_getready(bs));
1918 sndbuf_fillsilence(bs);
1919 chn_start(wrch, 0);
1920 }
1921 CHN_UNLOCK(wrch);
1922 }
1923 break;
1924
1925 case SNDCTL_DSP_SKIP:
1926 /*
1927 * OSSv4 docs: "This ioctl call discards all unplayed samples in the
1928 * playback buffer by moving the current write position immediately
1929 * before the point where the device is currently reading the samples."
1930 */
1931 if (wrch == NULL)
1932 ret = EINVAL;
1933 else {
1934 struct snd_dbuf *bs;
1935 CHN_LOCK(wrch);
1936 while (wrch->inprog != 0)
1937 cv_wait(&wrch->cv, wrch->lock);
1938 bs = wrch->bufsoft;
1939 if ((bs->shadbuf != NULL) && (bs->sl > 0)) {
1940 sndbuf_softreset(bs);
1941 sndbuf_acquire(bs, bs->shadbuf, bs->sl);
1942 bs->sl = 0;
1943 chn_start(wrch, 0);
1944 }
1945 CHN_UNLOCK(wrch);
1946 }
1947 break;
1948
1949 case SNDCTL_DSP_CURRENT_OPTR:
1950 case SNDCTL_DSP_CURRENT_IPTR:
1951 /**
1952 * @note Changing formats resets the buffer counters, which differs
1953 * from the 4Front drivers. However, I don't expect this to be
1954 * much of a problem.
1955 *
1956 * @note In a test where @c CURRENT_OPTR is called immediately after write
1957 * returns, this driver is about 32K samples behind whereas
1958 * 4Front's is about 8K samples behind. Should determine source
1959 * of discrepancy, even if only out of curiosity.
1960 *
1961 * @todo Actually test SNDCTL_DSP_CURRENT_IPTR.
1962 */
1963 chn = (cmd == SNDCTL_DSP_CURRENT_OPTR) ? wrch : rdch;
1964 if (chn == NULL)
1965 ret = EINVAL;
1966 else {
1967 struct snd_dbuf *bs;
1968 /* int tmp; */
1969
1970 oss_count_t *oc = (oss_count_t *)arg;
1971
1972 CHN_LOCK(chn);
1973 bs = chn->bufsoft;
1974 #if 0
1975 tmp = (sndbuf_getsize(b) + chn_getptr(chn) - sndbuf_gethwptr(b)) % sndbuf_getsize(b);
1976 oc->samples = (sndbuf_gettotal(b) + tmp) / sndbuf_getalign(b);
1977 oc->fifo_samples = (sndbuf_getready(b) - tmp) / sndbuf_getalign(b);
1978 #else
1979 oc->samples = sndbuf_gettotal(bs) / sndbuf_getalign(bs);
1980 oc->fifo_samples = sndbuf_getready(bs) / sndbuf_getalign(bs);
1981 #endif
1982 CHN_UNLOCK(chn);
1983 }
1984 break;
1985
1986 case SNDCTL_DSP_HALT_OUTPUT:
1987 case SNDCTL_DSP_HALT_INPUT:
1988 chn = (cmd == SNDCTL_DSP_HALT_OUTPUT) ? wrch : rdch;
1989 if (chn == NULL)
1990 ret = EINVAL;
1991 else {
1992 CHN_LOCK(chn);
1993 chn_abort(chn);
1994 CHN_UNLOCK(chn);
1995 }
1996 break;
1997
1998 case SNDCTL_DSP_LOW_WATER:
1999 /*
2000 * Set the number of bytes required to attract attention by
2001 * select/poll.
2002 */
2003 if (wrch != NULL) {
2004 CHN_LOCK(wrch);
2005 wrch->lw = (*arg_i > 1) ? *arg_i : 1;
2006 CHN_UNLOCK(wrch);
2007 }
2008 if (rdch != NULL) {
2009 CHN_LOCK(rdch);
2010 rdch->lw = (*arg_i > 1) ? *arg_i : 1;
2011 CHN_UNLOCK(rdch);
2012 }
2013 break;
2014
2015 case SNDCTL_DSP_GETERROR:
2016 /*
2017 * OSSv4 docs: "All errors and counters will automatically be
2018 * cleared to zeroes after the call so each call will return only
2019 * the errors that occurred after the previous invocation. ... The
2020 * play_underruns and rec_overrun fields are the only useful fields
2021 * returned by OSS 4.0."
2022 */
2023 {
2024 audio_errinfo *ei = (audio_errinfo *)arg;
2025
2026 bzero((void *)ei, sizeof(*ei));
2027
2028 if (wrch != NULL) {
2029 CHN_LOCK(wrch);
2030 ei->play_underruns = wrch->xruns;
2031 wrch->xruns = 0;
2032 CHN_UNLOCK(wrch);
2033 }
2034 if (rdch != NULL) {
2035 CHN_LOCK(rdch);
2036 ei->rec_overruns = rdch->xruns;
2037 rdch->xruns = 0;
2038 CHN_UNLOCK(rdch);
2039 }
2040 }
2041 break;
2042
2043 case SNDCTL_DSP_SYNCGROUP:
2044 PCM_ACQUIRE_QUICK(d);
2045 ret = dsp_oss_syncgroup(wrch, rdch, (oss_syncgroup *)arg);
2046 PCM_RELEASE_QUICK(d);
2047 break;
2048
2049 case SNDCTL_DSP_SYNCSTART:
2050 PCM_ACQUIRE_QUICK(d);
2051 ret = dsp_oss_syncstart(*arg_i);
2052 PCM_RELEASE_QUICK(d);
2053 break;
2054
2055 case SNDCTL_DSP_POLICY:
2056 PCM_ACQUIRE_QUICK(d);
2057 ret = dsp_oss_policy(wrch, rdch, *arg_i);
2058 PCM_RELEASE_QUICK(d);
2059 break;
2060
2061 case SNDCTL_DSP_COOKEDMODE:
2062 PCM_ACQUIRE_QUICK(d);
2063 if (!(dsp_get_flags(i_dev) & SD_F_BITPERFECT))
2064 ret = dsp_oss_cookedmode(wrch, rdch, *arg_i);
2065 PCM_RELEASE_QUICK(d);
2066 break;
2067 case SNDCTL_DSP_GET_CHNORDER:
2068 PCM_ACQUIRE_QUICK(d);
2069 ret = dsp_oss_getchnorder(wrch, rdch, (unsigned long long *)arg);
2070 PCM_RELEASE_QUICK(d);
2071 break;
2072 case SNDCTL_DSP_SET_CHNORDER:
2073 PCM_ACQUIRE_QUICK(d);
2074 ret = dsp_oss_setchnorder(wrch, rdch, (unsigned long long *)arg);
2075 PCM_RELEASE_QUICK(d);
2076 break;
2077 case SNDCTL_DSP_GETCHANNELMASK: /* XXX vlc */
2078 PCM_ACQUIRE_QUICK(d);
2079 ret = dsp_oss_getchannelmask(wrch, rdch, (int *)arg);
2080 PCM_RELEASE_QUICK(d);
2081 break;
2082 case SNDCTL_DSP_BIND_CHANNEL: /* XXX what?!? */
2083 ret = EINVAL;
2084 break;
2085 #ifdef OSSV4_EXPERIMENT
2086 /*
2087 * XXX The following ioctls are not yet supported and just return
2088 * EINVAL.
2089 */
2090 case SNDCTL_DSP_GETOPEAKS:
2091 case SNDCTL_DSP_GETIPEAKS:
2092 chn = (cmd == SNDCTL_DSP_GETOPEAKS) ? wrch : rdch;
2093 if (chn == NULL)
2094 ret = EINVAL;
2095 else {
2096 oss_peaks_t *op = (oss_peaks_t *)arg;
2097 int lpeak, rpeak;
2098
2099 CHN_LOCK(chn);
2100 ret = chn_getpeaks(chn, &lpeak, &rpeak);
2101 if (ret == -1)
2102 ret = EINVAL;
2103 else {
2104 (*op)[0] = lpeak;
2105 (*op)[1] = rpeak;
2106 }
2107 CHN_UNLOCK(chn);
2108 }
2109 break;
2110
2111 /*
2112 * XXX Once implemented, revisit this for proper cv protection
2113 * (if necessary).
2114 */
2115 case SNDCTL_GETLABEL:
2116 ret = dsp_oss_getlabel(wrch, rdch, (oss_label_t *)arg);
2117 break;
2118 case SNDCTL_SETLABEL:
2119 ret = dsp_oss_setlabel(wrch, rdch, (oss_label_t *)arg);
2120 break;
2121 case SNDCTL_GETSONG:
2122 ret = dsp_oss_getsong(wrch, rdch, (oss_longname_t *)arg);
2123 break;
2124 case SNDCTL_SETSONG:
2125 ret = dsp_oss_setsong(wrch, rdch, (oss_longname_t *)arg);
2126 break;
2127 case SNDCTL_SETNAME:
2128 ret = dsp_oss_setname(wrch, rdch, (oss_longname_t *)arg);
2129 break;
2130 #if 0
2131 /**
2132 * @note The S/PDIF interface ioctls, @c SNDCTL_DSP_READCTL and
2133 * @c SNDCTL_DSP_WRITECTL have been omitted at the suggestion of
2134 * 4Front Technologies.
2135 */
2136 case SNDCTL_DSP_READCTL:
2137 case SNDCTL_DSP_WRITECTL:
2138 ret = EINVAL;
2139 break;
2140 #endif /* !0 (explicitly omitted ioctls) */
2141
2142 #endif /* !OSSV4_EXPERIMENT */
2143 case SNDCTL_DSP_MAPINBUF:
2144 case SNDCTL_DSP_MAPOUTBUF:
2145 case SNDCTL_DSP_SETSYNCRO:
2146 /* undocumented */
2147
2148 case SNDCTL_DSP_SUBDIVIDE:
2149 case SOUND_PCM_WRITE_FILTER:
2150 case SOUND_PCM_READ_FILTER:
2151 /* dunno what these do, don't sound important */
2152
2153 default:
2154 DEB(printf("default ioctl fn 0x%08lx fail\n", cmd));
2155 ret = EINVAL;
2156 break;
2157 }
2158
2159 PCM_GIANT_LEAVE(d);
2160
2161 return (ret);
2162 }
2163
2164 static int
2165 dsp_poll(struct cdev *i_dev, int events, struct thread *td)
2166 {
2167 struct snddev_info *d;
2168 struct pcm_channel *wrch, *rdch;
2169 int ret, e;
2170
2171 d = dsp_get_info(i_dev);
2172 if (PCM_DETACHING(d) || !DSP_REGISTERED(d, i_dev)) {
2173 /* XXX many clients don't understand POLLNVAL */
2174 return (events & (POLLHUP | POLLPRI | POLLIN |
2175 POLLRDNORM | POLLOUT | POLLWRNORM));
2176 }
2177 PCM_GIANT_ENTER(d);
2178
2179 wrch = NULL;
2180 rdch = NULL;
2181 ret = 0;
2182
2183 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
2184
2185 if (wrch != NULL && !(wrch->flags & CHN_F_DEAD)) {
2186 e = (events & (POLLOUT | POLLWRNORM));
2187 if (e)
2188 ret |= chn_poll(wrch, e, td);
2189 }
2190
2191 if (rdch != NULL && !(rdch->flags & CHN_F_DEAD)) {
2192 e = (events & (POLLIN | POLLRDNORM));
2193 if (e)
2194 ret |= chn_poll(rdch, e, td);
2195 }
2196
2197 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
2198
2199 PCM_GIANT_LEAVE(d);
2200
2201 return (ret);
2202 }
2203
2204 static int
2205 dsp_mmap(struct cdev *i_dev, vm_ooffset_t offset, vm_paddr_t *paddr,
2206 int nprot, vm_memattr_t *memattr)
2207 {
2208
2209 /* XXX memattr is not honored */
2210 *paddr = vtophys(offset);
2211 return (0);
2212 }
2213
2214 static int
2215 dsp_mmap_single(struct cdev *i_dev, vm_ooffset_t *offset,
2216 vm_size_t size, struct vm_object **object, int nprot)
2217 {
2218 struct snddev_info *d;
2219 struct pcm_channel *wrch, *rdch, *c;
2220
2221 /*
2222 * Reject PROT_EXEC by default. It just doesn't makes sense.
2223 * Unfortunately, we have to give up this one due to linux_mmap
2224 * changes.
2225 *
2226 * http://lists.freebsd.org/pipermail/freebsd-emulation/2007-June/003698.html
2227 *
2228 */
2229 #ifdef SV_ABI_LINUX
2230 if ((nprot & PROT_EXEC) && (dsp_mmap_allow_prot_exec < 0 ||
2231 (dsp_mmap_allow_prot_exec == 0 &&
2232 SV_CURPROC_ABI() != SV_ABI_LINUX)))
2233 #else
2234 if ((nprot & PROT_EXEC) && dsp_mmap_allow_prot_exec < 1)
2235 #endif
2236 return (EINVAL);
2237
2238 /*
2239 * PROT_READ (alone) selects the input buffer.
2240 * PROT_WRITE (alone) selects the output buffer.
2241 * PROT_WRITE|PROT_READ together select the output buffer.
2242 */
2243 if ((nprot & (PROT_READ | PROT_WRITE)) == 0)
2244 return (EINVAL);
2245
2246 d = dsp_get_info(i_dev);
2247 if (PCM_DETACHING(d) || !DSP_REGISTERED(d, i_dev))
2248 return (EINVAL);
2249
2250 PCM_GIANT_ENTER(d);
2251
2252 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
2253
2254 c = ((nprot & PROT_WRITE) != 0) ? wrch : rdch;
2255 if (c == NULL || (c->flags & CHN_F_MMAP_INVALID) ||
2256 (*offset + size) > sndbuf_getsize(c->bufsoft) ||
2257 (wrch != NULL && (wrch->flags & CHN_F_MMAP_INVALID)) ||
2258 (rdch != NULL && (rdch->flags & CHN_F_MMAP_INVALID))) {
2259 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
2260 PCM_GIANT_EXIT(d);
2261 return (EINVAL);
2262 }
2263
2264 if (wrch != NULL)
2265 wrch->flags |= CHN_F_MMAP;
2266 if (rdch != NULL)
2267 rdch->flags |= CHN_F_MMAP;
2268
2269 *offset = (uintptr_t)sndbuf_getbufofs(c->bufsoft, *offset);
2270 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
2271 *object = vm_pager_allocate(OBJT_DEVICE, i_dev,
2272 size, nprot, *offset, curthread->td_ucred);
2273
2274 PCM_GIANT_LEAVE(d);
2275
2276 if (*object == NULL)
2277 return (EINVAL);
2278 return (0);
2279 }
2280
2281 /* So much for dev_stdclone() */
2282 static int
2283 dsp_stdclone(char *name, char *namep, char *sep, int use_sep, int *u, int *c)
2284 {
2285 size_t len;
2286
2287 len = strlen(namep);
2288
2289 if (bcmp(name, namep, len) != 0)
2290 return (ENODEV);
2291
2292 name += len;
2293
2294 if (isdigit(*name) == 0)
2295 return (ENODEV);
2296
2297 len = strlen(sep);
2298
2299 if (*name == '' && !(name[1] == '\0' || bcmp(name + 1, sep, len) == 0))
2300 return (ENODEV);
2301
2302 for (*u = 0; isdigit(*name) != 0; name++) {
2303 *u *= 10;
2304 *u += *name - '';
2305 if (*u > dsp_umax)
2306 return (ENODEV);
2307 }
2308
2309 if (*name == '\0')
2310 return ((use_sep == 0) ? 0 : ENODEV);
2311
2312 if (bcmp(name, sep, len) != 0 || isdigit(name[len]) == 0)
2313 return (ENODEV);
2314
2315 name += len;
2316
2317 if (*name == '' && name[1] != '\0')
2318 return (ENODEV);
2319
2320 for (*c = 0; isdigit(*name) != 0; name++) {
2321 *c *= 10;
2322 *c += *name - '';
2323 if (*c > dsp_cmax)
2324 return (ENODEV);
2325 }
2326
2327 if (*name != '\0')
2328 return (ENODEV);
2329
2330 return (0);
2331 }
2332
2333 static void
2334 dsp_clone(void *arg,
2335 #if __FreeBSD_version >= 600034
2336 struct ucred *cred,
2337 #endif
2338 char *name, int namelen, struct cdev **dev)
2339 {
2340 struct snddev_info *d;
2341 struct snd_clone_entry *ce;
2342 struct pcm_channel *c;
2343 int i, unit, udcmask, cunit, devtype, devhw, devcmax, tumax;
2344 char *devname, *devcmp, *devsep;
2345
2346 KASSERT(dsp_umax >= 0 && dsp_cmax >= 0, ("Uninitialized unit!"));
2347
2348 if (*dev != NULL)
2349 return;
2350
2351 unit = -1;
2352 cunit = -1;
2353 devtype = -1;
2354 devhw = 0;
2355 devcmax = -1;
2356 tumax = -1;
2357 devname = NULL;
2358 devsep = NULL;
2359
2360 for (i = 0; unit == -1 &&
2361 i < (sizeof(dsp_cdevs) / sizeof(dsp_cdevs[0])); i++) {
2362 devtype = dsp_cdevs[i].type;
2363 devcmp = dsp_cdevs[i].name;
2364 devsep = dsp_cdevs[i].sep;
2365 devname = dsp_cdevs[i].alias;
2366 if (devname == NULL)
2367 devname = devcmp;
2368 devhw = dsp_cdevs[i].hw;
2369 devcmax = dsp_cdevs[i].max - 1;
2370 if (strcmp(name, devcmp) == 0) {
2371 if (dsp_basename_clone != 0)
2372 unit = snd_unit;
2373 } else if (dsp_stdclone(name, devcmp, devsep,
2374 dsp_cdevs[i].use_sep, &unit, &cunit) != 0) {
2375 unit = -1;
2376 cunit = -1;
2377 }
2378 }
2379
2380 d = devclass_get_softc(pcm_devclass, unit);
2381 if (!PCM_REGISTERED(d) || d->clones == NULL)
2382 return;
2383
2384 /* XXX Need Giant magic entry ??? */
2385
2386 PCM_LOCK(d);
2387 if (snd_clone_disabled(d->clones)) {
2388 PCM_UNLOCK(d);
2389 return;
2390 }
2391
2392 PCM_WAIT(d);
2393 PCM_ACQUIRE(d);
2394 PCM_UNLOCK(d);
2395
2396 udcmask = snd_u2unit(unit) | snd_d2unit(devtype);
2397
2398 if (devhw != 0) {
2399 KASSERT(devcmax <= dsp_cmax,
2400 ("overflow: devcmax=%d, dsp_cmax=%d", devcmax, dsp_cmax));
2401 if (cunit > devcmax) {
2402 PCM_RELEASE_QUICK(d);
2403 return;
2404 }
2405 udcmask |= snd_c2unit(cunit);
2406 CHN_FOREACH(c, d, channels.pcm) {
2407 CHN_LOCK(c);
2408 if (c->unit != udcmask) {
2409 CHN_UNLOCK(c);
2410 continue;
2411 }
2412 CHN_UNLOCK(c);
2413 udcmask &= ~snd_c2unit(cunit);
2414 /*
2415 * Temporarily increase clone maxunit to overcome
2416 * vchan flexibility.
2417 *
2418 * # sysctl dev.pcm.0.play.vchans=256
2419 * dev.pcm.0.play.vchans: 1 -> 256
2420 * # cat /dev/zero > /dev/dsp0.vp255 &
2421 * [1] 17296
2422 * # sysctl dev.pcm.0.play.vchans=0
2423 * dev.pcm.0.play.vchans: 256 -> 1
2424 * # fg
2425 * [1] + running cat /dev/zero > /dev/dsp0.vp255
2426 * ^C
2427 * # cat /dev/zero > /dev/dsp0.vp255
2428 * zsh: operation not supported: /dev/dsp0.vp255
2429 */
2430 tumax = snd_clone_getmaxunit(d->clones);
2431 if (cunit > tumax)
2432 snd_clone_setmaxunit(d->clones, cunit);
2433 else
2434 tumax = -1;
2435 goto dsp_clone_alloc;
2436 }
2437 /*
2438 * Ok, so we're requesting unallocated vchan, but still
2439 * within maximum vchan limit.
2440 */
2441 if (((devtype == SND_DEV_DSPHW_VPLAY && d->pvchancount > 0) ||
2442 (devtype == SND_DEV_DSPHW_VREC && d->rvchancount > 0)) &&
2443 cunit < snd_maxautovchans) {
2444 udcmask &= ~snd_c2unit(cunit);
2445 tumax = snd_clone_getmaxunit(d->clones);
2446 if (cunit > tumax)
2447 snd_clone_setmaxunit(d->clones, cunit);
2448 else
2449 tumax = -1;
2450 goto dsp_clone_alloc;
2451 }
2452 PCM_RELEASE_QUICK(d);
2453 return;
2454 }
2455
2456 dsp_clone_alloc:
2457 ce = snd_clone_alloc(d->clones, dev, &cunit, udcmask);
2458 if (tumax != -1)
2459 snd_clone_setmaxunit(d->clones, tumax);
2460 if (ce != NULL) {
2461 udcmask |= snd_c2unit(cunit);
2462 *dev = make_dev(&dsp_cdevsw, PCMMINOR(udcmask),
2463 UID_ROOT, GID_WHEEL, 0666, "%s%d%s%d",
2464 devname, unit, devsep, cunit);
2465 snd_clone_register(ce, *dev);
2466 }
2467
2468 PCM_RELEASE_QUICK(d);
2469
2470 if (*dev != NULL)
2471 dev_ref(*dev);
2472 }
2473
2474 static void
2475 dsp_sysinit(void *p)
2476 {
2477 if (dsp_ehtag != NULL)
2478 return;
2479 /* initialize unit numbering */
2480 snd_unit_init();
2481 dsp_umax = PCMMAXUNIT;
2482 dsp_cmax = PCMMAXCHAN;
2483 dsp_ehtag = EVENTHANDLER_REGISTER(dev_clone, dsp_clone, 0, 1000);
2484 }
2485
2486 static void
2487 dsp_sysuninit(void *p)
2488 {
2489 if (dsp_ehtag == NULL)
2490 return;
2491 EVENTHANDLER_DEREGISTER(dev_clone, dsp_ehtag);
2492 dsp_ehtag = NULL;
2493 }
2494
2495 SYSINIT(dsp_sysinit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysinit, NULL);
2496 SYSUNINIT(dsp_sysuninit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysuninit, NULL);
2497
2498 char *
2499 dsp_unit2name(char *buf, size_t len, int unit)
2500 {
2501 int i, dtype;
2502
2503 KASSERT(buf != NULL && len != 0,
2504 ("bogus buf=%p len=%ju", buf, (uintmax_t)len));
2505
2506 dtype = snd_unit2d(unit);
2507
2508 for (i = 0; i < (sizeof(dsp_cdevs) / sizeof(dsp_cdevs[0])); i++) {
2509 if (dtype != dsp_cdevs[i].type || dsp_cdevs[i].alias != NULL)
2510 continue;
2511 snprintf(buf, len, "%s%d%s%d", dsp_cdevs[i].name,
2512 snd_unit2u(unit), dsp_cdevs[i].sep, snd_unit2c(unit));
2513 return (buf);
2514 }
2515
2516 return (NULL);
2517 }
2518
2519 /**
2520 * @brief Handler for SNDCTL_AUDIOINFO.
2521 *
2522 * Gathers information about the audio device specified in ai->dev. If
2523 * ai->dev == -1, then this function gathers information about the current
2524 * device. If the call comes in on a non-audio device and ai->dev == -1,
2525 * return EINVAL.
2526 *
2527 * This routine is supposed to go practically straight to the hardware,
2528 * getting capabilities directly from the sound card driver, side-stepping
2529 * the intermediate channel interface.
2530 *
2531 * Note, however, that the usefulness of this command is significantly
2532 * decreased when requesting info about any device other than the one serving
2533 * the request. While each snddev_channel refers to a specific device node,
2534 * the converse is *not* true. Currently, when a sound device node is opened,
2535 * the sound subsystem scans for an available audio channel (or channels, if
2536 * opened in read+write) and then assigns them to the si_drv[12] private
2537 * data fields. As a result, any information returned linking a channel to
2538 * a specific character device isn't necessarily accurate.
2539 *
2540 * @note
2541 * Calling threads must not hold any snddev_info or pcm_channel locks.
2542 *
2543 * @param dev device on which the ioctl was issued
2544 * @param ai ioctl request data container
2545 *
2546 * @retval 0 success
2547 * @retval EINVAL ai->dev specifies an invalid device
2548 *
2549 * @todo Verify correctness of Doxygen tags. ;)
2550 */
2551 int
2552 dsp_oss_audioinfo(struct cdev *i_dev, oss_audioinfo *ai)
2553 {
2554 struct pcmchan_caps *caps;
2555 struct pcm_channel *ch;
2556 struct snddev_info *d;
2557 uint32_t fmts;
2558 int i, nchan, *rates, minch, maxch;
2559 char *devname, buf[CHN_NAMELEN];
2560
2561 /*
2562 * If probing the device that received the ioctl, make sure it's a
2563 * DSP device. (Users may use this ioctl with /dev/mixer and
2564 * /dev/midi.)
2565 */
2566 if (ai->dev == -1 && i_dev->si_devsw != &dsp_cdevsw)
2567 return (EINVAL);
2568
2569 ch = NULL;
2570 devname = NULL;
2571 nchan = 0;
2572 bzero(buf, sizeof(buf));
2573
2574 /*
2575 * Search for the requested audio device (channel). Start by
2576 * iterating over pcm devices.
2577 */
2578 for (i = 0; pcm_devclass != NULL &&
2579 i < devclass_get_maxunit(pcm_devclass); i++) {
2580 d = devclass_get_softc(pcm_devclass, i);
2581 if (!PCM_REGISTERED(d))
2582 continue;
2583
2584 /* XXX Need Giant magic entry ??? */
2585
2586 /* See the note in function docblock */
2587 PCM_UNLOCKASSERT(d);
2588 PCM_LOCK(d);
2589
2590 CHN_FOREACH(ch, d, channels.pcm) {
2591 CHN_UNLOCKASSERT(ch);
2592 CHN_LOCK(ch);
2593 if (ai->dev == -1) {
2594 if (DSP_REGISTERED(d, i_dev) &&
2595 (ch == PCM_RDCH(i_dev) || /* record ch */
2596 ch == PCM_WRCH(i_dev))) { /* playback ch */
2597 devname = dsp_unit2name(buf,
2598 sizeof(buf), ch->unit);
2599 }
2600 } else if (ai->dev == nchan) {
2601 devname = dsp_unit2name(buf, sizeof(buf),
2602 ch->unit);
2603 }
2604 if (devname != NULL)
2605 break;
2606 CHN_UNLOCK(ch);
2607 ++nchan;
2608 }
2609
2610 if (devname != NULL) {
2611 /*
2612 * At this point, the following synchronization stuff
2613 * has happened:
2614 * - a specific PCM device is locked.
2615 * - a specific audio channel has been locked, so be
2616 * sure to unlock when exiting;
2617 */
2618
2619 caps = chn_getcaps(ch);
2620
2621 /*
2622 * With all handles collected, zero out the user's
2623 * container and begin filling in its fields.
2624 */
2625 bzero((void *)ai, sizeof(oss_audioinfo));
2626
2627 ai->dev = nchan;
2628 strlcpy(ai->name, ch->name, sizeof(ai->name));
2629
2630 if ((ch->flags & CHN_F_BUSY) == 0)
2631 ai->busy = 0;
2632 else
2633 ai->busy = (ch->direction == PCMDIR_PLAY) ? OPEN_WRITE : OPEN_READ;
2634
2635 /**
2636 * @note
2637 * @c cmd - OSSv4 docs: "Only supported under Linux at
2638 * this moment." Cop-out, I know, but I'll save
2639 * running around in the process table for later.
2640 * Is there a risk of leaking information?
2641 */
2642 ai->pid = ch->pid;
2643
2644 /*
2645 * These flags stolen from SNDCTL_DSP_GETCAPS handler.
2646 * Note, however, that a single channel operates in
2647 * only one direction, so PCM_CAP_DUPLEX is out.
2648 */
2649 /**
2650 * @todo @c SNDCTL_AUDIOINFO::caps - Make drivers keep
2651 * these in pcmchan::caps?
2652 */
2653 ai->caps = PCM_CAP_REALTIME | PCM_CAP_MMAP | PCM_CAP_TRIGGER |
2654 ((ch->direction == PCMDIR_PLAY) ? PCM_CAP_OUTPUT : PCM_CAP_INPUT);
2655
2656 /*
2657 * Collect formats supported @b natively by the
2658 * device. Also determine min/max channels. (I.e.,
2659 * mono, stereo, or both?)
2660 *
2661 * If any channel is stereo, maxch = 2;
2662 * if all channels are stereo, minch = 2, too;
2663 * if any channel is mono, minch = 1;
2664 * and if all channels are mono, maxch = 1.
2665 */
2666 minch = 0;
2667 maxch = 0;
2668 fmts = 0;
2669 for (i = 0; caps->fmtlist[i]; i++) {
2670 fmts |= caps->fmtlist[i];
2671 if (AFMT_CHANNEL(caps->fmtlist[i]) > 1) {
2672 minch = (minch == 0) ? 2 : minch;
2673 maxch = 2;
2674 } else {
2675 minch = 1;
2676 maxch = (maxch == 0) ? 1 : maxch;
2677 }
2678 }
2679
2680 if (ch->direction == PCMDIR_PLAY)
2681 ai->oformats = fmts;
2682 else
2683 ai->iformats = fmts;
2684
2685 /**
2686 * @note
2687 * @c magic - OSSv4 docs: "Reserved for internal use
2688 * by OSS."
2689 *
2690 * @par
2691 * @c card_number - OSSv4 docs: "Number of the sound
2692 * card where this device belongs or -1 if this
2693 * information is not available. Applications
2694 * should normally not use this field for any
2695 * purpose."
2696 */
2697 ai->card_number = -1;
2698 /**
2699 * @todo @c song_name - depends first on
2700 * SNDCTL_[GS]ETSONG @todo @c label - depends
2701 * on SNDCTL_[GS]ETLABEL
2702 * @todo @c port_number - routing information?
2703 */
2704 ai->port_number = -1;
2705 ai->mixer_dev = (d->mixer_dev != NULL) ? PCMUNIT(d->mixer_dev) : -1;
2706 /**
2707 * @note
2708 * @c real_device - OSSv4 docs: "Obsolete."
2709 */
2710 ai->real_device = -1;
2711 strlcpy(ai->devnode, "/dev/", sizeof(ai->devnode));
2712 strlcat(ai->devnode, devname, sizeof(ai->devnode));
2713 ai->enabled = device_is_attached(d->dev) ? 1 : 0;
2714 /**
2715 * @note
2716 * @c flags - OSSv4 docs: "Reserved for future use."
2717 *
2718 * @note
2719 * @c binding - OSSv4 docs: "Reserved for future use."
2720 *
2721 * @todo @c handle - haven't decided how to generate
2722 * this yet; bus, vendor, device IDs?
2723 */
2724 ai->min_rate = caps->minspeed;
2725 ai->max_rate = caps->maxspeed;
2726
2727 ai->min_channels = minch;
2728 ai->max_channels = maxch;
2729
2730 ai->nrates = chn_getrates(ch, &rates);
2731 if (ai->nrates > OSS_MAX_SAMPLE_RATES)
2732 ai->nrates = OSS_MAX_SAMPLE_RATES;
2733
2734 for (i = 0; i < ai->nrates; i++)
2735 ai->rates[i] = rates[i];
2736
2737 ai->next_play_engine = 0;
2738 ai->next_rec_engine = 0;
2739
2740 CHN_UNLOCK(ch);
2741 }
2742
2743 PCM_UNLOCK(d);
2744
2745 if (devname != NULL)
2746 return (0);
2747 }
2748
2749 /* Exhausted the search -- nothing is locked, so return. */
2750 return (EINVAL);
2751 }
2752
2753 /**
2754 * @brief Assigns a PCM channel to a sync group.
2755 *
2756 * Sync groups are used to enable audio operations on multiple devices
2757 * simultaneously. They may be used with any number of devices and may
2758 * span across applications. Devices are added to groups with
2759 * the SNDCTL_DSP_SYNCGROUP ioctl, and operations are triggered with the
2760 * SNDCTL_DSP_SYNCSTART ioctl.
2761 *
2762 * If the @c id field of the @c group parameter is set to zero, then a new
2763 * sync group is created. Otherwise, wrch and rdch (if set) are added to
2764 * the group specified.
2765 *
2766 * @todo As far as memory allocation, should we assume that things are
2767 * okay and allocate with M_WAITOK before acquiring channel locks,
2768 * freeing later if not?
2769 *
2770 * @param wrch output channel associated w/ device (if any)
2771 * @param rdch input channel associated w/ device (if any)
2772 * @param group Sync group parameters
2773 *
2774 * @retval 0 success
2775 * @retval non-zero error to be propagated upstream
2776 */
2777 static int
2778 dsp_oss_syncgroup(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_syncgroup *group)
2779 {
2780 struct pcmchan_syncmember *smrd, *smwr;
2781 struct pcmchan_syncgroup *sg;
2782 int ret, sg_ids[3];
2783
2784 smrd = NULL;
2785 smwr = NULL;
2786 sg = NULL;
2787 ret = 0;
2788
2789 /*
2790 * Free_unr() may sleep, so store released syncgroup IDs until after
2791 * all locks are released.
2792 */
2793 sg_ids[0] = sg_ids[1] = sg_ids[2] = 0;
2794
2795 PCM_SG_LOCK();
2796
2797 /*
2798 * - Insert channel(s) into group's member list.
2799 * - Set CHN_F_NOTRIGGER on channel(s).
2800 * - Stop channel(s).
2801 */
2802
2803 /*
2804 * If device's channels are already mapped to a group, unmap them.
2805 */
2806 if (wrch) {
2807 CHN_LOCK(wrch);
2808 sg_ids[0] = chn_syncdestroy(wrch);
2809 }
2810
2811 if (rdch) {
2812 CHN_LOCK(rdch);
2813 sg_ids[1] = chn_syncdestroy(rdch);
2814 }
2815
2816 /*
2817 * Verify that mode matches character device properites.
2818 * - Bail if PCM_ENABLE_OUTPUT && wrch == NULL.
2819 * - Bail if PCM_ENABLE_INPUT && rdch == NULL.
2820 */
2821 if (((wrch == NULL) && (group->mode & PCM_ENABLE_OUTPUT)) ||
2822 ((rdch == NULL) && (group->mode & PCM_ENABLE_INPUT))) {
2823 ret = EINVAL;
2824 goto out;
2825 }
2826
2827 /*
2828 * An id of zero indicates the user wants to create a new
2829 * syncgroup.
2830 */
2831 if (group->id == 0) {
2832 sg = (struct pcmchan_syncgroup *)malloc(sizeof(*sg), M_DEVBUF, M_NOWAIT);
2833 if (sg != NULL) {
2834 SLIST_INIT(&sg->members);
2835 sg->id = alloc_unr(pcmsg_unrhdr);
2836
2837 group->id = sg->id;
2838 SLIST_INSERT_HEAD(&snd_pcm_syncgroups, sg, link);
2839 } else
2840 ret = ENOMEM;
2841 } else {
2842 SLIST_FOREACH(sg, &snd_pcm_syncgroups, link) {
2843 if (sg->id == group->id)
2844 break;
2845 }
2846 if (sg == NULL)
2847 ret = EINVAL;
2848 }
2849
2850 /* Couldn't create or find a syncgroup. Fail. */
2851 if (sg == NULL)
2852 goto out;
2853
2854 /*
2855 * Allocate a syncmember, assign it and a channel together, and
2856 * insert into syncgroup.
2857 */
2858 if (group->mode & PCM_ENABLE_INPUT) {
2859 smrd = (struct pcmchan_syncmember *)malloc(sizeof(*smrd), M_DEVBUF, M_NOWAIT);
2860 if (smrd == NULL) {
2861 ret = ENOMEM;
2862 goto out;
2863 }
2864
2865 SLIST_INSERT_HEAD(&sg->members, smrd, link);
2866 smrd->parent = sg;
2867 smrd->ch = rdch;
2868
2869 chn_abort(rdch);
2870 rdch->flags |= CHN_F_NOTRIGGER;
2871 rdch->sm = smrd;
2872 }
2873
2874 if (group->mode & PCM_ENABLE_OUTPUT) {
2875 smwr = (struct pcmchan_syncmember *)malloc(sizeof(*smwr), M_DEVBUF, M_NOWAIT);
2876 if (smwr == NULL) {
2877 ret = ENOMEM;
2878 goto out;
2879 }
2880
2881 SLIST_INSERT_HEAD(&sg->members, smwr, link);
2882 smwr->parent = sg;
2883 smwr->ch = wrch;
2884
2885 chn_abort(wrch);
2886 wrch->flags |= CHN_F_NOTRIGGER;
2887 wrch->sm = smwr;
2888 }
2889
2890
2891 out:
2892 if (ret != 0) {
2893 if (smrd != NULL)
2894 free(smrd, M_DEVBUF);
2895 if ((sg != NULL) && SLIST_EMPTY(&sg->members)) {
2896 sg_ids[2] = sg->id;
2897 SLIST_REMOVE(&snd_pcm_syncgroups, sg, pcmchan_syncgroup, link);
2898 free(sg, M_DEVBUF);
2899 }
2900
2901 if (wrch)
2902 wrch->sm = NULL;
2903 if (rdch)
2904 rdch->sm = NULL;
2905 }
2906
2907 if (wrch)
2908 CHN_UNLOCK(wrch);
2909 if (rdch)
2910 CHN_UNLOCK(rdch);
2911
2912 PCM_SG_UNLOCK();
2913
2914 if (sg_ids[0])
2915 free_unr(pcmsg_unrhdr, sg_ids[0]);
2916 if (sg_ids[1])
2917 free_unr(pcmsg_unrhdr, sg_ids[1]);
2918 if (sg_ids[2])
2919 free_unr(pcmsg_unrhdr, sg_ids[2]);
2920
2921 return (ret);
2922 }
2923
2924 /**
2925 * @brief Launch a sync group into action
2926 *
2927 * Sync groups are established via SNDCTL_DSP_SYNCGROUP. This function
2928 * iterates over all members, triggering them along the way.
2929 *
2930 * @note Caller must not hold any channel locks.
2931 *
2932 * @param sg_id sync group identifier
2933 *
2934 * @retval 0 success
2935 * @retval non-zero error worthy of propagating upstream to user
2936 */
2937 static int
2938 dsp_oss_syncstart(int sg_id)
2939 {
2940 struct pcmchan_syncmember *sm, *sm_tmp;
2941 struct pcmchan_syncgroup *sg;
2942 struct pcm_channel *c;
2943 int ret, needlocks;
2944
2945 /* Get the synclists lock */
2946 PCM_SG_LOCK();
2947
2948 do {
2949 ret = 0;
2950 needlocks = 0;
2951
2952 /* Search for syncgroup by ID */
2953 SLIST_FOREACH(sg, &snd_pcm_syncgroups, link) {
2954 if (sg->id == sg_id)
2955 break;
2956 }
2957
2958 /* Return EINVAL if not found */
2959 if (sg == NULL) {
2960 ret = EINVAL;
2961 break;
2962 }
2963
2964 /* Any removals resulting in an empty group should've handled this */
2965 KASSERT(!SLIST_EMPTY(&sg->members), ("found empty syncgroup"));
2966
2967 /*
2968 * Attempt to lock all member channels - if any are already
2969 * locked, unlock those acquired, sleep for a bit, and try
2970 * again.
2971 */
2972 SLIST_FOREACH(sm, &sg->members, link) {
2973 if (CHN_TRYLOCK(sm->ch) == 0) {
2974 int timo = hz * 5/1000;
2975 if (timo < 1)
2976 timo = 1;
2977
2978 /* Release all locked channels so far, retry */
2979 SLIST_FOREACH(sm_tmp, &sg->members, link) {
2980 /* sm is the member already locked */
2981 if (sm == sm_tmp)
2982 break;
2983 CHN_UNLOCK(sm_tmp->ch);
2984 }
2985
2986 /** @todo Is PRIBIO correct/ */
2987 ret = msleep(sm, &snd_pcm_syncgroups_mtx,
2988 PRIBIO | PCATCH, "pcmsg", timo);
2989 if (ret == EINTR || ret == ERESTART)
2990 break;
2991
2992 needlocks = 1;
2993 ret = 0; /* Assumes ret == EAGAIN... */
2994 }
2995 }
2996 } while (needlocks && ret == 0);
2997
2998 /* Proceed only if no errors encountered. */
2999 if (ret == 0) {
3000 /* Launch channels */
3001 while ((sm = SLIST_FIRST(&sg->members)) != NULL) {
3002 SLIST_REMOVE_HEAD(&sg->members, link);
3003
3004 c = sm->ch;
3005 c->sm = NULL;
3006 chn_start(c, 1);
3007 c->flags &= ~CHN_F_NOTRIGGER;
3008 CHN_UNLOCK(c);
3009
3010 free(sm, M_DEVBUF);
3011 }
3012
3013 SLIST_REMOVE(&snd_pcm_syncgroups, sg, pcmchan_syncgroup, link);
3014 free(sg, M_DEVBUF);
3015 }
3016
3017 PCM_SG_UNLOCK();
3018
3019 /*
3020 * Free_unr() may sleep, so be sure to give up the syncgroup lock
3021 * first.
3022 */
3023 if (ret == 0)
3024 free_unr(pcmsg_unrhdr, sg_id);
3025
3026 return (ret);
3027 }
3028
3029 /**
3030 * @brief Handler for SNDCTL_DSP_POLICY
3031 *
3032 * The SNDCTL_DSP_POLICY ioctl is a simpler interface to control fragment
3033 * size and count like with SNDCTL_DSP_SETFRAGMENT. Instead of the user
3034 * specifying those two parameters, s/he simply selects a number from 0..10
3035 * which corresponds to a buffer size. Smaller numbers request smaller
3036 * buffers with lower latencies (at greater overhead from more frequent
3037 * interrupts), while greater numbers behave in the opposite manner.
3038 *
3039 * The 4Front spec states that a value of 5 should be the default. However,
3040 * this implementation deviates slightly by using a linear scale without
3041 * consulting drivers. I.e., even though drivers may have different default
3042 * buffer sizes, a policy argument of 5 will have the same result across
3043 * all drivers.
3044 *
3045 * See http://manuals.opensound.com/developer/SNDCTL_DSP_POLICY.html for
3046 * more information.
3047 *
3048 * @todo When SNDCTL_DSP_COOKEDMODE is supported, it'll be necessary to
3049 * work with hardware drivers directly.
3050 *
3051 * @note PCM channel arguments must not be locked by caller.
3052 *
3053 * @param wrch Pointer to opened playback channel (optional; may be NULL)
3054 * @param rdch " recording channel (optional; may be NULL)
3055 * @param policy Integer from [0:10]
3056 *
3057 * @retval 0 constant (for now)
3058 */
3059 static int
3060 dsp_oss_policy(struct pcm_channel *wrch, struct pcm_channel *rdch, int policy)
3061 {
3062 int ret;
3063
3064 if (policy < CHN_POLICY_MIN || policy > CHN_POLICY_MAX)
3065 return (EIO);
3066
3067 /* Default: success */
3068 ret = 0;
3069
3070 if (rdch) {
3071 CHN_LOCK(rdch);
3072 ret = chn_setlatency(rdch, policy);
3073 CHN_UNLOCK(rdch);
3074 }
3075
3076 if (wrch && ret == 0) {
3077 CHN_LOCK(wrch);
3078 ret = chn_setlatency(wrch, policy);
3079 CHN_UNLOCK(wrch);
3080 }
3081
3082 if (ret)
3083 ret = EIO;
3084
3085 return (ret);
3086 }
3087
3088 /**
3089 * @brief Enable or disable "cooked" mode
3090 *
3091 * This is a handler for @c SNDCTL_DSP_COOKEDMODE. When in cooked mode, which
3092 * is the default, the sound system handles rate and format conversions
3093 * automatically (ex: user writing 11025Hz/8 bit/unsigned but card only
3094 * operates with 44100Hz/16bit/signed samples).
3095 *
3096 * Disabling cooked mode is intended for applications wanting to mmap()
3097 * a sound card's buffer space directly, bypassing the FreeBSD 2-stage
3098 * feeder architecture, presumably to gain as much control over audio
3099 * hardware as possible.
3100 *
3101 * See @c http://manuals.opensound.com/developer/SNDCTL_DSP_COOKEDMODE.html
3102 * for more details.
3103 *
3104 * @param wrch playback channel (optional; may be NULL)
3105 * @param rdch recording channel (optional; may be NULL)
3106 * @param enabled 0 = raw mode, 1 = cooked mode
3107 *
3108 * @retval EINVAL Operation not yet supported.
3109 */
3110 static int
3111 dsp_oss_cookedmode(struct pcm_channel *wrch, struct pcm_channel *rdch, int enabled)
3112 {
3113
3114 /*
3115 * XXX I just don't get it. Why don't they call it
3116 * "BITPERFECT" ~ SNDCTL_DSP_BITPERFECT !?!?.
3117 * This is just plain so confusing, incoherent,
3118 * <insert any non-printable characters here>.
3119 */
3120 if (!(enabled == 1 || enabled == 0))
3121 return (EINVAL);
3122
3123 /*
3124 * I won't give in. I'm inverting its logic here and now.
3125 * Brag all you want, but "BITPERFECT" should be the better
3126 * term here.
3127 */
3128 enabled ^= 0x00000001;
3129
3130 if (wrch != NULL) {
3131 CHN_LOCK(wrch);
3132 wrch->flags &= ~CHN_F_BITPERFECT;
3133 wrch->flags |= (enabled != 0) ? CHN_F_BITPERFECT : 0x00000000;
3134 CHN_UNLOCK(wrch);
3135 }
3136
3137 if (rdch != NULL) {
3138 CHN_LOCK(rdch);
3139 rdch->flags &= ~CHN_F_BITPERFECT;
3140 rdch->flags |= (enabled != 0) ? CHN_F_BITPERFECT : 0x00000000;
3141 CHN_UNLOCK(rdch);
3142 }
3143
3144 return (0);
3145 }
3146
3147 /**
3148 * @brief Retrieve channel interleaving order
3149 *
3150 * This is the handler for @c SNDCTL_DSP_GET_CHNORDER.
3151 *
3152 * See @c http://manuals.opensound.com/developer/SNDCTL_DSP_GET_CHNORDER.html
3153 * for more details.
3154 *
3155 * @note As the ioctl definition is still under construction, FreeBSD
3156 * does not currently support SNDCTL_DSP_GET_CHNORDER.
3157 *
3158 * @param wrch playback channel (optional; may be NULL)
3159 * @param rdch recording channel (optional; may be NULL)
3160 * @param map channel map (result will be stored there)
3161 *
3162 * @retval EINVAL Operation not yet supported.
3163 */
3164 static int
3165 dsp_oss_getchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map)
3166 {
3167 struct pcm_channel *ch;
3168 int ret;
3169
3170 ch = (wrch != NULL) ? wrch : rdch;
3171 if (ch != NULL) {
3172 CHN_LOCK(ch);
3173 ret = chn_oss_getorder(ch, map);
3174 CHN_UNLOCK(ch);
3175 } else
3176 ret = EINVAL;
3177
3178 return (ret);
3179 }
3180
3181 /**
3182 * @brief Specify channel interleaving order
3183 *
3184 * This is the handler for @c SNDCTL_DSP_SET_CHNORDER.
3185 *
3186 * @note As the ioctl definition is still under construction, FreeBSD
3187 * does not currently support @c SNDCTL_DSP_SET_CHNORDER.
3188 *
3189 * @param wrch playback channel (optional; may be NULL)
3190 * @param rdch recording channel (optional; may be NULL)
3191 * @param map channel map
3192 *
3193 * @retval EINVAL Operation not yet supported.
3194 */
3195 static int
3196 dsp_oss_setchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map)
3197 {
3198 int ret;
3199
3200 ret = 0;
3201
3202 if (wrch != NULL) {
3203 CHN_LOCK(wrch);
3204 ret = chn_oss_setorder(wrch, map);
3205 CHN_UNLOCK(wrch);
3206 }
3207
3208 if (ret == 0 && rdch != NULL) {
3209 CHN_LOCK(rdch);
3210 ret = chn_oss_setorder(rdch, map);
3211 CHN_UNLOCK(rdch);
3212 }
3213
3214 return (ret);
3215 }
3216
3217 static int
3218 dsp_oss_getchannelmask(struct pcm_channel *wrch, struct pcm_channel *rdch,
3219 int *mask)
3220 {
3221 struct pcm_channel *ch;
3222 uint32_t chnmask;
3223 int ret;
3224
3225 chnmask = 0;
3226 ch = (wrch != NULL) ? wrch : rdch;
3227
3228 if (ch != NULL) {
3229 CHN_LOCK(ch);
3230 ret = chn_oss_getmask(ch, &chnmask);
3231 CHN_UNLOCK(ch);
3232 } else
3233 ret = EINVAL;
3234
3235 if (ret == 0)
3236 *mask = chnmask;
3237
3238 return (ret);
3239 }
3240
3241 #ifdef OSSV4_EXPERIMENT
3242 /**
3243 * @brief Retrieve an audio device's label
3244 *
3245 * This is a handler for the @c SNDCTL_GETLABEL ioctl.
3246 *
3247 * See @c http://manuals.opensound.com/developer/SNDCTL_GETLABEL.html
3248 * for more details.
3249 *
3250 * From Hannu@4Front: "For example ossxmix (just like some HW mixer
3251 * consoles) can show variable "labels" for certain controls. By default
3252 * the application name (say quake) is shown as the label but
3253 * applications may change the labels themselves."
3254 *
3255 * @note As the ioctl definition is still under construction, FreeBSD
3256 * does not currently support @c SNDCTL_GETLABEL.
3257 *
3258 * @param wrch playback channel (optional; may be NULL)
3259 * @param rdch recording channel (optional; may be NULL)
3260 * @param label label gets copied here
3261 *
3262 * @retval EINVAL Operation not yet supported.
3263 */
3264 static int
3265 dsp_oss_getlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label)
3266 {
3267 return (EINVAL);
3268 }
3269
3270 /**
3271 * @brief Specify an audio device's label
3272 *
3273 * This is a handler for the @c SNDCTL_SETLABEL ioctl. Please see the
3274 * comments for @c dsp_oss_getlabel immediately above.
3275 *
3276 * See @c http://manuals.opensound.com/developer/SNDCTL_GETLABEL.html
3277 * for more details.
3278 *
3279 * @note As the ioctl definition is still under construction, FreeBSD
3280 * does not currently support SNDCTL_SETLABEL.
3281 *
3282 * @param wrch playback channel (optional; may be NULL)
3283 * @param rdch recording channel (optional; may be NULL)
3284 * @param label label gets copied from here
3285 *
3286 * @retval EINVAL Operation not yet supported.
3287 */
3288 static int
3289 dsp_oss_setlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label)
3290 {
3291 return (EINVAL);
3292 }
3293
3294 /**
3295 * @brief Retrieve name of currently played song
3296 *
3297 * This is a handler for the @c SNDCTL_GETSONG ioctl. Audio players could
3298 * tell the system the name of the currently playing song, which would be
3299 * visible in @c /dev/sndstat.
3300 *
3301 * See @c http://manuals.opensound.com/developer/SNDCTL_GETSONG.html
3302 * for more details.
3303 *
3304 * @note As the ioctl definition is still under construction, FreeBSD
3305 * does not currently support SNDCTL_GETSONG.
3306 *
3307 * @param wrch playback channel (optional; may be NULL)
3308 * @param rdch recording channel (optional; may be NULL)
3309 * @param song song name gets copied here
3310 *
3311 * @retval EINVAL Operation not yet supported.
3312 */
3313 static int
3314 dsp_oss_getsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song)
3315 {
3316 return (EINVAL);
3317 }
3318
3319 /**
3320 * @brief Retrieve name of currently played song
3321 *
3322 * This is a handler for the @c SNDCTL_SETSONG ioctl. Audio players could
3323 * tell the system the name of the currently playing song, which would be
3324 * visible in @c /dev/sndstat.
3325 *
3326 * See @c http://manuals.opensound.com/developer/SNDCTL_SETSONG.html
3327 * for more details.
3328 *
3329 * @note As the ioctl definition is still under construction, FreeBSD
3330 * does not currently support SNDCTL_SETSONG.
3331 *
3332 * @param wrch playback channel (optional; may be NULL)
3333 * @param rdch recording channel (optional; may be NULL)
3334 * @param song song name gets copied from here
3335 *
3336 * @retval EINVAL Operation not yet supported.
3337 */
3338 static int
3339 dsp_oss_setsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song)
3340 {
3341 return (EINVAL);
3342 }
3343
3344 /**
3345 * @brief Rename a device
3346 *
3347 * This is a handler for the @c SNDCTL_SETNAME ioctl.
3348 *
3349 * See @c http://manuals.opensound.com/developer/SNDCTL_SETNAME.html for
3350 * more details.
3351 *
3352 * From Hannu@4Front: "This call is used to change the device name
3353 * reported in /dev/sndstat and ossinfo. So instead of using some generic
3354 * 'OSS loopback audio (MIDI) driver' the device may be given a meaningfull
3355 * name depending on the current context (for example 'OSS virtual wave table
3356 * synth' or 'VoIP link to London')."
3357 *
3358 * @note As the ioctl definition is still under construction, FreeBSD
3359 * does not currently support SNDCTL_SETNAME.
3360 *
3361 * @param wrch playback channel (optional; may be NULL)
3362 * @param rdch recording channel (optional; may be NULL)
3363 * @param name new device name gets copied from here
3364 *
3365 * @retval EINVAL Operation not yet supported.
3366 */
3367 static int
3368 dsp_oss_setname(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *name)
3369 {
3370 return (EINVAL);
3371 }
3372 #endif /* !OSSV4_EXPERIMENT */
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