38
39static int dsp_mmap_allow_prot_exec = 0;
40SYSCTL_INT(_hw_snd, OID_AUTO, compat_linux_mmap, CTLFLAG_RW,
41 &dsp_mmap_allow_prot_exec, 0,
42 "linux mmap compatibility (-1=force disable 0=auto 1=force enable)");
43
44struct dsp_cdevinfo {
45 struct pcm_channel *rdch, *wrch;
46 struct pcm_channel *volch;
47 int busy, simplex;
48 TAILQ_ENTRY(dsp_cdevinfo) link;
49};
50
51#define PCM_RDCH(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->rdch)
52#define PCM_WRCH(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->wrch)
53#define PCM_VOLCH(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->volch)
54#define PCM_SIMPLEX(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->simplex)
55
56#define DSP_CDEVINFO_CACHESIZE 8
57
58#define DSP_REGISTERED(x, y) (PCM_REGISTERED(x) && \
59 (y) != NULL && (y)->si_drv1 != NULL)
60
61#define OLDPCM_IOCTL
62
63static d_open_t dsp_open;
64static d_close_t dsp_close;
65static d_read_t dsp_read;
66static d_write_t dsp_write;
67static d_ioctl_t dsp_ioctl;
68static d_poll_t dsp_poll;
69static d_mmap_t dsp_mmap;
70
71struct cdevsw dsp_cdevsw = {
72 .d_version = D_VERSION,
73 .d_open = dsp_open,
74 .d_close = dsp_close,
75 .d_read = dsp_read,
76 .d_write = dsp_write,
77 .d_ioctl = dsp_ioctl,
78 .d_poll = dsp_poll,
79 .d_mmap = dsp_mmap,
80 .d_name = "dsp",
81};
82
83static eventhandler_tag dsp_ehtag = NULL;
84static int dsp_umax = -1;
85static int dsp_cmax = -1;
86
87static int dsp_oss_syncgroup(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_syncgroup *group);
88static int dsp_oss_syncstart(int sg_id);
89static int dsp_oss_policy(struct pcm_channel *wrch, struct pcm_channel *rdch, int policy);
90static int dsp_oss_cookedmode(struct pcm_channel *wrch, struct pcm_channel *rdch, int enabled);
91static int dsp_oss_getchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map);
92static int dsp_oss_setchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map);
93static int dsp_oss_getchannelmask(struct pcm_channel *wrch, struct pcm_channel *rdch, int *mask);
94#ifdef OSSV4_EXPERIMENT
95static int dsp_oss_getlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label);
96static int dsp_oss_setlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label);
97static int dsp_oss_getsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song);
98static int dsp_oss_setsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song);
99static int dsp_oss_setname(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *name);
100#endif
101
102static struct snddev_info *
103dsp_get_info(struct cdev *dev)
104{
105 return (devclass_get_softc(pcm_devclass, PCMUNIT(dev)));
106}
107
108static uint32_t
109dsp_get_flags(struct cdev *dev)
110{
111 device_t bdev;
112
113 bdev = devclass_get_device(pcm_devclass, PCMUNIT(dev));
114
115 return ((bdev != NULL) ? pcm_getflags(bdev) : 0xffffffff);
116}
117
118static void
119dsp_set_flags(struct cdev *dev, uint32_t flags)
120{
121 device_t bdev;
122
123 bdev = devclass_get_device(pcm_devclass, PCMUNIT(dev));
124
125 if (bdev != NULL)
126 pcm_setflags(bdev, flags);
127}
128
129/*
130 * return the channels associated with an open device instance.
131 * lock channels specified.
132 */
133static int
134getchns(struct cdev *dev, struct pcm_channel **rdch, struct pcm_channel **wrch,
135 uint32_t prio)
136{
137 struct snddev_info *d;
138 struct pcm_channel *ch;
139 uint32_t flags;
140
141 if (PCM_SIMPLEX(dev) != 0) {
142 d = dsp_get_info(dev);
143 if (!PCM_REGISTERED(d))
144 return (ENXIO);
145 PCM_LOCK(d);
146 PCM_WAIT(d);
147 PCM_ACQUIRE(d);
148 /*
149 * Note: order is important -
150 * pcm flags -> prio query flags -> wild guess
151 */
152 ch = NULL;
153 flags = dsp_get_flags(dev);
154 if (flags & SD_F_PRIO_WR) {
155 ch = PCM_RDCH(dev);
156 PCM_RDCH(dev) = NULL;
157 } else if (flags & SD_F_PRIO_RD) {
158 ch = PCM_WRCH(dev);
159 PCM_WRCH(dev) = NULL;
160 } else if (prio & SD_F_PRIO_WR) {
161 ch = PCM_RDCH(dev);
162 PCM_RDCH(dev) = NULL;
163 flags |= SD_F_PRIO_WR;
164 } else if (prio & SD_F_PRIO_RD) {
165 ch = PCM_WRCH(dev);
166 PCM_WRCH(dev) = NULL;
167 flags |= SD_F_PRIO_RD;
168 } else if (PCM_WRCH(dev) != NULL) {
169 ch = PCM_RDCH(dev);
170 PCM_RDCH(dev) = NULL;
171 flags |= SD_F_PRIO_WR;
172 } else if (PCM_RDCH(dev) != NULL) {
173 ch = PCM_WRCH(dev);
174 PCM_WRCH(dev) = NULL;
175 flags |= SD_F_PRIO_RD;
176 }
177 PCM_SIMPLEX(dev) = 0;
178 dsp_set_flags(dev, flags);
179 if (ch != NULL) {
180 CHN_LOCK(ch);
181 pcm_chnref(ch, -1);
182 pcm_chnrelease(ch);
183 }
184 PCM_RELEASE(d);
185 PCM_UNLOCK(d);
186 }
187
188 *rdch = PCM_RDCH(dev);
189 *wrch = PCM_WRCH(dev);
190
191 if (*rdch != NULL && (prio & SD_F_PRIO_RD))
192 CHN_LOCK(*rdch);
193 if (*wrch != NULL && (prio & SD_F_PRIO_WR))
194 CHN_LOCK(*wrch);
195
196 return (0);
197}
198
199/* unlock specified channels */
200static void
201relchns(struct cdev *dev, struct pcm_channel *rdch, struct pcm_channel *wrch,
202 uint32_t prio)
203{
204 if (wrch != NULL && (prio & SD_F_PRIO_WR))
205 CHN_UNLOCK(wrch);
206 if (rdch != NULL && (prio & SD_F_PRIO_RD))
207 CHN_UNLOCK(rdch);
208}
209
210static void
211dsp_cdevinfo_alloc(struct cdev *dev,
212 struct pcm_channel *rdch, struct pcm_channel *wrch,
213 struct pcm_channel *volch)
214{
215 struct snddev_info *d;
216 struct dsp_cdevinfo *cdi;
217 int simplex;
218
219 d = dsp_get_info(dev);
220
221 KASSERT(PCM_REGISTERED(d) && dev != NULL && dev->si_drv1 == NULL &&
222 ((rdch == NULL && wrch == NULL) || rdch != wrch),
223 ("bogus %s(), what are you trying to accomplish here?", __func__));
224 PCM_BUSYASSERT(d);
225 PCM_LOCKASSERT(d);
226
227 simplex = (dsp_get_flags(dev) & SD_F_SIMPLEX) ? 1 : 0;
228
229 /*
230 * Scan for free instance entry and put it into the end of list.
231 * Create new one if necessary.
232 */
233 TAILQ_FOREACH(cdi, &d->dsp_cdevinfo_pool, link) {
234 if (cdi->busy != 0)
235 break;
236 cdi->rdch = rdch;
237 cdi->wrch = wrch;
238 cdi->volch = volch;
239 cdi->simplex = simplex;
240 cdi->busy = 1;
241 TAILQ_REMOVE(&d->dsp_cdevinfo_pool, cdi, link);
242 TAILQ_INSERT_TAIL(&d->dsp_cdevinfo_pool, cdi, link);
243 dev->si_drv1 = cdi;
244 return;
245 }
246 PCM_UNLOCK(d);
247 cdi = malloc(sizeof(*cdi), M_DEVBUF, M_WAITOK | M_ZERO);
248 PCM_LOCK(d);
249 cdi->rdch = rdch;
250 cdi->wrch = wrch;
251 cdi->volch = volch;
252 cdi->simplex = simplex;
253 cdi->busy = 1;
254 TAILQ_INSERT_TAIL(&d->dsp_cdevinfo_pool, cdi, link);
255 dev->si_drv1 = cdi;
256}
257
258static void
259dsp_cdevinfo_free(struct cdev *dev)
260{
261 struct snddev_info *d;
262 struct dsp_cdevinfo *cdi, *tmp;
263 uint32_t flags;
264 int i;
265
266 d = dsp_get_info(dev);
267
268 KASSERT(PCM_REGISTERED(d) && dev != NULL && dev->si_drv1 != NULL &&
269 PCM_RDCH(dev) == NULL && PCM_WRCH(dev) == NULL &&
270 PCM_VOLCH(dev) == NULL,
271 ("bogus %s(), what are you trying to accomplish here?", __func__));
272 PCM_BUSYASSERT(d);
273 PCM_LOCKASSERT(d);
274
275 cdi = dev->si_drv1;
276 dev->si_drv1 = NULL;
277 cdi->rdch = NULL;
278 cdi->wrch = NULL;
279 cdi->volch = NULL;
280 cdi->simplex = 0;
281 cdi->busy = 0;
282
283 /*
284 * Once it is free, move it back to the beginning of list for
285 * faster new entry allocation.
286 */
287 TAILQ_REMOVE(&d->dsp_cdevinfo_pool, cdi, link);
288 TAILQ_INSERT_HEAD(&d->dsp_cdevinfo_pool, cdi, link);
289
290 /*
291 * Scan the list, cache free entries up to DSP_CDEVINFO_CACHESIZE.
292 * Reset simplex flags.
293 */
294 flags = dsp_get_flags(dev) & ~SD_F_PRIO_SET;
295 i = DSP_CDEVINFO_CACHESIZE;
296 TAILQ_FOREACH_SAFE(cdi, &d->dsp_cdevinfo_pool, link, tmp) {
297 if (cdi->busy != 0) {
298 if (cdi->simplex == 0) {
299 if (cdi->rdch != NULL)
300 flags |= SD_F_PRIO_RD;
301 if (cdi->wrch != NULL)
302 flags |= SD_F_PRIO_WR;
303 }
304 } else {
305 if (i == 0) {
306 TAILQ_REMOVE(&d->dsp_cdevinfo_pool, cdi, link);
307 free(cdi, M_DEVBUF);
308 } else
309 i--;
310 }
311 }
312 dsp_set_flags(dev, flags);
313}
314
315void
316dsp_cdevinfo_init(struct snddev_info *d)
317{
318 struct dsp_cdevinfo *cdi;
319 int i;
320
321 KASSERT(d != NULL, ("NULL snddev_info"));
322 PCM_BUSYASSERT(d);
323 PCM_UNLOCKASSERT(d);
324
325 TAILQ_INIT(&d->dsp_cdevinfo_pool);
326 for (i = 0; i < DSP_CDEVINFO_CACHESIZE; i++) {
327 cdi = malloc(sizeof(*cdi), M_DEVBUF, M_WAITOK | M_ZERO);
328 TAILQ_INSERT_HEAD(&d->dsp_cdevinfo_pool, cdi, link);
329 }
330}
331
332void
333dsp_cdevinfo_flush(struct snddev_info *d)
334{
335 struct dsp_cdevinfo *cdi, *tmp;
336
337 KASSERT(d != NULL, ("NULL snddev_info"));
338 PCM_BUSYASSERT(d);
339 PCM_UNLOCKASSERT(d);
340
341 cdi = TAILQ_FIRST(&d->dsp_cdevinfo_pool);
342 while (cdi != NULL) {
343 tmp = TAILQ_NEXT(cdi, link);
344 free(cdi, M_DEVBUF);
345 cdi = tmp;
346 }
347 TAILQ_INIT(&d->dsp_cdevinfo_pool);
348}
349
350/* duplex / simplex cdev type */
351enum {
352 DSP_CDEV_TYPE_RDONLY, /* simplex read-only (record) */
353 DSP_CDEV_TYPE_WRONLY, /* simplex write-only (play) */
354 DSP_CDEV_TYPE_RDWR /* duplex read, write, or both */
355};
356
357enum {
358 DSP_CDEV_VOLCTL_NONE,
359 DSP_CDEV_VOLCTL_READ,
360 DSP_CDEV_VOLCTL_WRITE
361};
362
363#define DSP_F_VALID(x) ((x) & (FREAD | FWRITE))
364#define DSP_F_DUPLEX(x) (((x) & (FREAD | FWRITE)) == (FREAD | FWRITE))
365#define DSP_F_SIMPLEX(x) (!DSP_F_DUPLEX(x))
366#define DSP_F_READ(x) ((x) & FREAD)
367#define DSP_F_WRITE(x) ((x) & FWRITE)
368
369static const struct {
370 int type;
371 char *name;
372 char *sep;
373 char *alias;
374 int use_sep;
375 int hw;
376 int max;
377 int volctl;
378 uint32_t fmt, spd;
379 int query;
380} dsp_cdevs[] = {
381 { SND_DEV_DSP, "dsp", ".", NULL, 0, 0, 0, 0,
382 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
383 DSP_CDEV_TYPE_RDWR },
384 { SND_DEV_AUDIO, "audio", ".", NULL, 0, 0, 0, 0,
385 SND_FORMAT(AFMT_MU_LAW, 1, 0), DSP_DEFAULT_SPEED,
386 DSP_CDEV_TYPE_RDWR },
387 { SND_DEV_DSP16, "dspW", ".", NULL, 0, 0, 0, 0,
388 SND_FORMAT(AFMT_S16_LE, 1, 0), DSP_DEFAULT_SPEED,
389 DSP_CDEV_TYPE_RDWR },
390 { SND_DEV_DSPHW_PLAY, "dsp", ".p", NULL, 1, 1, SND_MAXHWCHAN, 1,
391 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_WRONLY },
392 { SND_DEV_DSPHW_VPLAY, "dsp", ".vp", NULL, 1, 1, SND_MAXVCHANS, 1,
393 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_WRONLY },
394 { SND_DEV_DSPHW_REC, "dsp", ".r", NULL, 1, 1, SND_MAXHWCHAN, 1,
395 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_RDONLY },
396 { SND_DEV_DSPHW_VREC, "dsp", ".vr", NULL, 1, 1, SND_MAXVCHANS, 1,
397 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_RDONLY },
398 { SND_DEV_DSPHW_CD, "dspcd", ".", NULL, 0, 0, 0, 0,
399 SND_FORMAT(AFMT_S16_LE, 2, 0), 44100, DSP_CDEV_TYPE_RDWR },
400 /* Low priority, OSSv4 aliases. */
401 { SND_DEV_DSP, "dsp_ac3", ".", "dsp", 0, 0, 0, 0,
402 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
403 DSP_CDEV_TYPE_RDWR },
404 { SND_DEV_DSP, "dsp_mmap", ".", "dsp", 0, 0, 0, 0,
405 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
406 DSP_CDEV_TYPE_RDWR },
407 { SND_DEV_DSP, "dsp_multich", ".", "dsp", 0, 0, 0, 0,
408 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
409 DSP_CDEV_TYPE_RDWR },
410 { SND_DEV_DSP, "dsp_spdifout", ".", "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_spdifin", ".", "dsp", 0, 0, 0, 0,
414 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
415 DSP_CDEV_TYPE_RDWR },
416};
417
418#define DSP_FIXUP_ERROR() do { \
419 prio = dsp_get_flags(i_dev); \
420 if (!DSP_F_VALID(flags)) \
421 error = EINVAL; \
422 if (!DSP_F_DUPLEX(flags) && \
423 ((DSP_F_READ(flags) && d->reccount == 0) || \
424 (DSP_F_WRITE(flags) && d->playcount == 0))) \
425 error = ENOTSUP; \
426 else if (!DSP_F_DUPLEX(flags) && (prio & SD_F_SIMPLEX) && \
427 ((DSP_F_READ(flags) && (prio & SD_F_PRIO_WR)) || \
428 (DSP_F_WRITE(flags) && (prio & SD_F_PRIO_RD)))) \
429 error = EBUSY; \
430 else if (DSP_REGISTERED(d, i_dev)) \
431 error = EBUSY; \
432} while (0)
433
434static int
435dsp_open(struct cdev *i_dev, int flags, int mode, struct thread *td)
436{
437 struct pcm_channel *rdch, *wrch;
438 struct snddev_info *d;
439 uint32_t fmt, spd, prio, volctl;
440 int i, error, rderror, wrerror, devtype, wdevunit, rdevunit;
441
442 /* Kind of impossible.. */
443 if (i_dev == NULL || td == NULL)
444 return (ENODEV);
445
446 d = dsp_get_info(i_dev);
447 if (!PCM_REGISTERED(d))
448 return (EBADF);
449
450 PCM_GIANT_ENTER(d);
451
452 /* Lock snddev so nobody else can monkey with it. */
453 PCM_LOCK(d);
454 PCM_WAIT(d);
455
456 /*
457 * Try to acquire cloned device before someone else pick it.
458 * ENODEV means this is not a cloned droids.
459 */
460 error = snd_clone_acquire(i_dev);
461 if (!(error == 0 || error == ENODEV)) {
462 DSP_FIXUP_ERROR();
463 PCM_UNLOCK(d);
464 PCM_GIANT_EXIT(d);
465 return (error);
466 }
467
468 error = 0;
469 DSP_FIXUP_ERROR();
470
471 if (error != 0) {
472 (void)snd_clone_release(i_dev);
473 PCM_UNLOCK(d);
474 PCM_GIANT_EXIT(d);
475 return (error);
476 }
477
478 /*
479 * That is just enough. Acquire and unlock pcm lock so
480 * the other will just have to wait until we finish doing
481 * everything.
482 */
483 PCM_ACQUIRE(d);
484 PCM_UNLOCK(d);
485
486 devtype = PCMDEV(i_dev);
487 wdevunit = -1;
488 rdevunit = -1;
489 fmt = 0;
490 spd = 0;
491 volctl = DSP_CDEV_VOLCTL_NONE;
492
493 for (i = 0; i < (sizeof(dsp_cdevs) / sizeof(dsp_cdevs[0])); i++) {
494 if (devtype != dsp_cdevs[i].type || dsp_cdevs[i].alias != NULL)
495 continue;
496 /*
497 * Volume control only valid for DSPHW devices,
498 * and it must be opened in opposite direction be it
499 * simplex or duplex. Anything else will be handled
500 * as usual.
501 */
502 if (dsp_cdevs[i].query == DSP_CDEV_TYPE_WRONLY) {
503 if (dsp_cdevs[i].volctl != 0 &&
504 DSP_F_READ(flags)) {
505 volctl = DSP_CDEV_VOLCTL_WRITE;
506 flags &= ~FREAD;
507 flags |= FWRITE;
508 }
509 if (DSP_F_READ(flags)) {
510 (void)snd_clone_release(i_dev);
511 PCM_RELEASE_QUICK(d);
512 PCM_GIANT_EXIT(d);
513 return (ENOTSUP);
514 }
515 wdevunit = dev2unit(i_dev);
516 } else if (dsp_cdevs[i].query == DSP_CDEV_TYPE_RDONLY) {
517 if (dsp_cdevs[i].volctl != 0 &&
518 DSP_F_WRITE(flags)) {
519 volctl = DSP_CDEV_VOLCTL_READ;
520 flags &= ~FWRITE;
521 flags |= FREAD;
522 }
523 if (DSP_F_WRITE(flags)) {
524 (void)snd_clone_release(i_dev);
525 PCM_RELEASE_QUICK(d);
526 PCM_GIANT_EXIT(d);
527 return (ENOTSUP);
528 }
529 rdevunit = dev2unit(i_dev);
530 }
531 fmt = dsp_cdevs[i].fmt;
532 spd = dsp_cdevs[i].spd;
533 break;
534 }
535
536 /* No matching devtype? */
537 if (fmt == 0 || spd == 0)
538 panic("impossible devtype %d", devtype);
539
540 rdch = NULL;
541 wrch = NULL;
542 rderror = 0;
543 wrerror = 0;
544
545 /*
546 * if we get here, the open request is valid- either:
547 * * we were previously not open
548 * * we were open for play xor record and the opener wants
549 * the non-open direction
550 */
551 if (DSP_F_READ(flags)) {
552 /* open for read */
553 rderror = pcm_chnalloc(d, &rdch, PCMDIR_REC,
554 td->td_proc->p_pid, td->td_proc->p_comm, rdevunit);
555
556 if (rderror == 0 && chn_reset(rdch, fmt, spd) != 0)
557 rderror = ENXIO;
558
559 if (volctl == DSP_CDEV_VOLCTL_READ)
560 rderror = 0;
561
562 if (rderror != 0) {
563 if (rdch != NULL)
564 pcm_chnrelease(rdch);
565 if (!DSP_F_DUPLEX(flags)) {
566 (void)snd_clone_release(i_dev);
567 PCM_RELEASE_QUICK(d);
568 PCM_GIANT_EXIT(d);
569 return (rderror);
570 }
571 rdch = NULL;
572 } else if (volctl == DSP_CDEV_VOLCTL_READ) {
573 if (rdch != NULL) {
574 pcm_chnref(rdch, 1);
575 pcm_chnrelease(rdch);
576 }
577 } else {
578 if (flags & O_NONBLOCK)
579 rdch->flags |= CHN_F_NBIO;
580 if (flags & O_EXCL)
581 rdch->flags |= CHN_F_EXCLUSIVE;
582 pcm_chnref(rdch, 1);
583 if (volctl == DSP_CDEV_VOLCTL_NONE)
584 chn_vpc_reset(rdch, SND_VOL_C_PCM, 0);
585 CHN_UNLOCK(rdch);
586 }
587 }
588
589 if (DSP_F_WRITE(flags)) {
590 /* open for write */
591 wrerror = pcm_chnalloc(d, &wrch, PCMDIR_PLAY,
592 td->td_proc->p_pid, td->td_proc->p_comm, wdevunit);
593
594 if (wrerror == 0 && chn_reset(wrch, fmt, spd) != 0)
595 wrerror = ENXIO;
596
597 if (volctl == DSP_CDEV_VOLCTL_WRITE)
598 wrerror = 0;
599
600 if (wrerror != 0) {
601 if (wrch != NULL)
602 pcm_chnrelease(wrch);
603 if (!DSP_F_DUPLEX(flags)) {
604 if (rdch != NULL) {
605 /*
606 * Lock, deref and release previously
607 * created record channel
608 */
609 CHN_LOCK(rdch);
610 pcm_chnref(rdch, -1);
611 pcm_chnrelease(rdch);
612 }
613 (void)snd_clone_release(i_dev);
614 PCM_RELEASE_QUICK(d);
615 PCM_GIANT_EXIT(d);
616 return (wrerror);
617 }
618 wrch = NULL;
619 } else if (volctl == DSP_CDEV_VOLCTL_WRITE) {
620 if (wrch != NULL) {
621 pcm_chnref(wrch, 1);
622 pcm_chnrelease(wrch);
623 }
624 } else {
625 if (flags & O_NONBLOCK)
626 wrch->flags |= CHN_F_NBIO;
627 if (flags & O_EXCL)
628 wrch->flags |= CHN_F_EXCLUSIVE;
629 pcm_chnref(wrch, 1);
630 if (volctl == DSP_CDEV_VOLCTL_NONE)
631 chn_vpc_reset(wrch, SND_VOL_C_PCM, 0);
632 CHN_UNLOCK(wrch);
633 }
634 }
635
636
637 PCM_LOCK(d);
638
639 /*
640 * We're done. Allocate channels information for this cdev.
641 */
642 switch (volctl) {
643 case DSP_CDEV_VOLCTL_READ:
644 KASSERT(wrch == NULL, ("wrch=%p not null!", wrch));
645 dsp_cdevinfo_alloc(i_dev, NULL, NULL, rdch);
646 break;
647 case DSP_CDEV_VOLCTL_WRITE:
648 KASSERT(rdch == NULL, ("rdch=%p not null!", rdch));
649 dsp_cdevinfo_alloc(i_dev, NULL, NULL, wrch);
650 break;
651 case DSP_CDEV_VOLCTL_NONE:
652 default:
653 if (wrch == NULL && rdch == NULL) {
654 (void)snd_clone_release(i_dev);
655 PCM_RELEASE(d);
656 PCM_UNLOCK(d);
657 PCM_GIANT_EXIT(d);
658 if (wrerror != 0)
659 return (wrerror);
660 if (rderror != 0)
661 return (rderror);
662 return (EINVAL);
663 }
664 dsp_cdevinfo_alloc(i_dev, rdch, wrch, NULL);
665 if (rdch != NULL)
666 CHN_INSERT_HEAD(d, rdch, channels.pcm.opened);
667 if (wrch != NULL)
668 CHN_INSERT_HEAD(d, wrch, channels.pcm.opened);
669 break;
670 }
671
672 /*
673 * Increase clone refcount for its automatic garbage collector.
674 */
675 (void)snd_clone_ref(i_dev);
676
677 PCM_RELEASE(d);
678 PCM_UNLOCK(d);
679
680 PCM_GIANT_LEAVE(d);
681
682 return (0);
683}
684
685static int
686dsp_close(struct cdev *i_dev, int flags, int mode, struct thread *td)
687{
688 struct pcm_channel *rdch, *wrch, *volch;
689 struct snddev_info *d;
690 int sg_ids, rdref, wdref;
691
692 d = dsp_get_info(i_dev);
693 if (!DSP_REGISTERED(d, i_dev))
694 return (EBADF);
695
696 PCM_GIANT_ENTER(d);
697
698 PCM_LOCK(d);
699 PCM_WAIT(d);
700 PCM_ACQUIRE(d);
701
702 rdch = PCM_RDCH(i_dev);
703 wrch = PCM_WRCH(i_dev);
704 volch = PCM_VOLCH(i_dev);
705
706 PCM_RDCH(i_dev) = NULL;
707 PCM_WRCH(i_dev) = NULL;
708 PCM_VOLCH(i_dev) = NULL;
709
710 rdref = -1;
711 wdref = -1;
712
713 if (volch != NULL) {
714 if (volch == rdch)
715 rdref--;
716 else if (volch == wrch)
717 wdref--;
718 else {
719 CHN_LOCK(volch);
720 pcm_chnref(volch, -1);
721 CHN_UNLOCK(volch);
722 }
723 }
724
725 if (rdch != NULL)
726 CHN_REMOVE(d, rdch, channels.pcm.opened);
727 if (wrch != NULL)
728 CHN_REMOVE(d, wrch, channels.pcm.opened);
729
730 if (rdch != NULL || wrch != NULL) {
731 PCM_UNLOCK(d);
732 if (rdch != NULL) {
733 /*
734 * The channel itself need not be locked because:
735 * a) Adding a channel to a syncgroup happens only
736 * in dsp_ioctl(), which cannot run concurrently
737 * to dsp_close().
738 * b) The syncmember pointer (sm) is protected by
739 * the global syncgroup list lock.
740 * c) A channel can't just disappear, invalidating
741 * pointers, unless it's closed/dereferenced
742 * first.
743 */
744 PCM_SG_LOCK();
745 sg_ids = chn_syncdestroy(rdch);
746 PCM_SG_UNLOCK();
747 if (sg_ids != 0)
748 free_unr(pcmsg_unrhdr, sg_ids);
749
750 CHN_LOCK(rdch);
751 pcm_chnref(rdch, rdref);
752 chn_abort(rdch); /* won't sleep */
753 rdch->flags &= ~(CHN_F_RUNNING | CHN_F_MMAP |
754 CHN_F_DEAD | CHN_F_EXCLUSIVE);
755 chn_reset(rdch, 0, 0);
756 pcm_chnrelease(rdch);
757 }
758 if (wrch != NULL) {
759 /*
760 * Please see block above.
761 */
762 PCM_SG_LOCK();
763 sg_ids = chn_syncdestroy(wrch);
764 PCM_SG_UNLOCK();
765 if (sg_ids != 0)
766 free_unr(pcmsg_unrhdr, sg_ids);
767
768 CHN_LOCK(wrch);
769 pcm_chnref(wrch, wdref);
770 chn_flush(wrch); /* may sleep */
771 wrch->flags &= ~(CHN_F_RUNNING | CHN_F_MMAP |
772 CHN_F_DEAD | CHN_F_EXCLUSIVE);
773 chn_reset(wrch, 0, 0);
774 pcm_chnrelease(wrch);
775 }
776 PCM_LOCK(d);
777 }
778
779 dsp_cdevinfo_free(i_dev);
780 /*
781 * Release clone busy state and unref it so the automatic
782 * garbage collector will get the hint and do the remaining
783 * cleanup process.
784 */
785 (void)snd_clone_release(i_dev);
786
787 /*
788 * destroy_dev() might sleep, so release pcm lock
789 * here and rely on pcm cv serialization.
790 */
791 PCM_UNLOCK(d);
792 (void)snd_clone_unref(i_dev);
793 PCM_LOCK(d);
794
795 PCM_RELEASE(d);
796 PCM_UNLOCK(d);
797
798 PCM_GIANT_LEAVE(d);
799
800 return (0);
801}
802
803static __inline int
804dsp_io_ops(struct cdev *i_dev, struct uio *buf)
805{
806 struct snddev_info *d;
807 struct pcm_channel **ch, *rdch, *wrch;
808 int (*chn_io)(struct pcm_channel *, struct uio *);
809 int prio, ret;
810 pid_t runpid;
811
812 KASSERT(i_dev != NULL && buf != NULL &&
813 (buf->uio_rw == UIO_READ || buf->uio_rw == UIO_WRITE),
814 ("%s(): io train wreck!", __func__));
815
816 d = dsp_get_info(i_dev);
817 if (!DSP_REGISTERED(d, i_dev))
818 return (EBADF);
819
820 PCM_GIANT_ENTER(d);
821
822 switch (buf->uio_rw) {
823 case UIO_READ:
824 prio = SD_F_PRIO_RD;
825 ch = &rdch;
826 chn_io = chn_read;
827 break;
828 case UIO_WRITE:
829 prio = SD_F_PRIO_WR;
830 ch = &wrch;
831 chn_io = chn_write;
832 break;
833 default:
834 panic("invalid/corrupted uio direction: %d", buf->uio_rw);
835 break;
836 }
837
838 rdch = NULL;
839 wrch = NULL;
840 runpid = buf->uio_td->td_proc->p_pid;
841
842 getchns(i_dev, &rdch, &wrch, prio);
843
844 if (*ch == NULL || !((*ch)->flags & CHN_F_BUSY)) {
845 PCM_GIANT_EXIT(d);
846 return (EBADF);
847 }
848
849 if (((*ch)->flags & (CHN_F_MMAP | CHN_F_DEAD)) ||
850 (((*ch)->flags & CHN_F_RUNNING) && (*ch)->pid != runpid)) {
851 relchns(i_dev, rdch, wrch, prio);
852 PCM_GIANT_EXIT(d);
853 return (EINVAL);
854 } else if (!((*ch)->flags & CHN_F_RUNNING)) {
855 (*ch)->flags |= CHN_F_RUNNING;
856 (*ch)->pid = runpid;
857 }
858
859 /*
860 * chn_read/write must give up channel lock in order to copy bytes
861 * from/to userland, so up the "in progress" counter to make sure
862 * someone else doesn't come along and muss up the buffer.
863 */
864 ++(*ch)->inprog;
865 ret = chn_io(*ch, buf);
866 --(*ch)->inprog;
867
868 CHN_BROADCAST(&(*ch)->cv);
869
870 relchns(i_dev, rdch, wrch, prio);
871
872 PCM_GIANT_LEAVE(d);
873
874 return (ret);
875}
876
877static int
878dsp_read(struct cdev *i_dev, struct uio *buf, int flag)
879{
880 return (dsp_io_ops(i_dev, buf));
881}
882
883static int
884dsp_write(struct cdev *i_dev, struct uio *buf, int flag)
885{
886 return (dsp_io_ops(i_dev, buf));
887}
888
889static int
890dsp_get_volume_channel(struct cdev *dev, struct pcm_channel **volch)
891{
892 struct snddev_info *d;
893 struct pcm_channel *c;
894 int unit;
895
896 KASSERT(dev != NULL && volch != NULL,
897 ("%s(): NULL query dev=%p volch=%p", __func__, dev, volch));
898
899 d = dsp_get_info(dev);
900 if (!PCM_REGISTERED(d)) {
901 *volch = NULL;
902 return (EINVAL);
903 }
904
905 PCM_UNLOCKASSERT(d);
906
907 *volch = NULL;
908
909 c = PCM_VOLCH(dev);
910 if (c != NULL) {
911 if (!(c->feederflags & (1 << FEEDER_VOLUME)))
912 return (-1);
913 *volch = c;
914 return (0);
915 }
916
917 PCM_LOCK(d);
918 PCM_WAIT(d);
919 PCM_ACQUIRE(d);
920
921 unit = dev2unit(dev);
922
923 CHN_FOREACH(c, d, channels.pcm) {
924 CHN_LOCK(c);
925 if (c->unit != unit) {
926 CHN_UNLOCK(c);
927 continue;
928 }
929 *volch = c;
930 pcm_chnref(c, 1);
931 PCM_VOLCH(dev) = c;
932 CHN_UNLOCK(c);
933 PCM_RELEASE(d);
934 PCM_UNLOCK(d);
935 return ((c->feederflags & (1 << FEEDER_VOLUME)) ? 0 : -1);
936 }
937
938 PCM_RELEASE(d);
939 PCM_UNLOCK(d);
940
941 return (EINVAL);
942}
943
944static int
945dsp_ioctl_channel(struct cdev *dev, struct pcm_channel *volch, u_long cmd,
946 caddr_t arg)
947{
948 struct snddev_info *d;
949 struct pcm_channel *rdch, *wrch;
950 int j, devtype, ret;
951
952 d = dsp_get_info(dev);
953 if (!PCM_REGISTERED(d) || !(dsp_get_flags(dev) & SD_F_VPC))
954 return (-1);
955
956 PCM_UNLOCKASSERT(d);
957
958 j = cmd & 0xff;
959
960 rdch = PCM_RDCH(dev);
961 wrch = PCM_WRCH(dev);
962
963 /* No specific channel, look into cache */
964 if (volch == NULL)
965 volch = PCM_VOLCH(dev);
966
967 /* Look harder */
968 if (volch == NULL) {
969 if (j == SOUND_MIXER_RECLEV && rdch != NULL)
970 volch = rdch;
971 else if (j == SOUND_MIXER_PCM && wrch != NULL)
972 volch = wrch;
973 }
974
975 devtype = PCMDEV(dev);
976
977 /* Look super harder */
978 if (volch == NULL &&
979 (devtype == SND_DEV_DSPHW_PLAY || devtype == SND_DEV_DSPHW_VPLAY ||
980 devtype == SND_DEV_DSPHW_REC || devtype == SND_DEV_DSPHW_VREC)) {
981 ret = dsp_get_volume_channel(dev, &volch);
982 if (ret != 0)
983 return (ret);
984 if (volch == NULL)
985 return (EINVAL);
986 }
987
988 /* Final validation */
989 if (volch != NULL) {
990 CHN_LOCK(volch);
991 if (!(volch->feederflags & (1 << FEEDER_VOLUME))) {
992 CHN_UNLOCK(volch);
993 return (-1);
994 }
995 if (volch->direction == PCMDIR_PLAY)
996 wrch = volch;
997 else
998 rdch = volch;
999 }
1000
1001 ret = EINVAL;
1002
1003 if (volch != NULL &&
1004 ((j == SOUND_MIXER_PCM && volch->direction == PCMDIR_PLAY) ||
1005 (j == SOUND_MIXER_RECLEV && volch->direction == PCMDIR_REC))) {
1006 if ((cmd & MIXER_WRITE(0)) == MIXER_WRITE(0)) {
1007 int left, right, center;
1008
1009 left = *(int *)arg & 0x7f;
1010 right = ((*(int *)arg) >> 8) & 0x7f;
1011 center = (left + right) >> 1;
1012 chn_setvolume_multi(volch, SND_VOL_C_PCM, left, right,
1013 center);
1014 } else if ((cmd & MIXER_READ(0)) == MIXER_READ(0)) {
1015 *(int *)arg = CHN_GETVOLUME(volch,
1016 SND_VOL_C_PCM, SND_CHN_T_FL);
1017 *(int *)arg |= CHN_GETVOLUME(volch,
1018 SND_VOL_C_PCM, SND_CHN_T_FR) << 8;
1019 }
1020 ret = 0;
1021 } else if (rdch != NULL || wrch != NULL) {
1022 switch (j) {
1023 case SOUND_MIXER_DEVMASK:
1024 case SOUND_MIXER_CAPS:
1025 case SOUND_MIXER_STEREODEVS:
1026 if ((cmd & MIXER_READ(0)) == MIXER_READ(0)) {
1027 *(int *)arg = 0;
1028 if (rdch != NULL)
1029 *(int *)arg |= SOUND_MASK_RECLEV;
1030 if (wrch != NULL)
1031 *(int *)arg |= SOUND_MASK_PCM;
1032 }
1033 ret = 0;
1034 break;
1035 case SOUND_MIXER_RECMASK:
1036 case SOUND_MIXER_RECSRC:
1037 if ((cmd & MIXER_READ(0)) == MIXER_READ(0))
1038 *(int *)arg = 0;
1039 ret = 0;
1040 break;
1041 default:
1042 break;
1043 }
1044 }
1045
1046 if (volch != NULL)
1047 CHN_UNLOCK(volch);
1048
1049 return (ret);
1050}
1051
1052static int
1053dsp_ioctl(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode,
1054 struct thread *td)
1055{
1056 struct pcm_channel *chn, *rdch, *wrch;
1057 struct snddev_info *d;
1058 int *arg_i, ret, tmp, xcmd;
1059
1060 d = dsp_get_info(i_dev);
1061 if (!DSP_REGISTERED(d, i_dev))
1062 return (EBADF);
1063
1064 PCM_GIANT_ENTER(d);
1065
1066 arg_i = (int *)arg;
1067 ret = 0;
1068 xcmd = 0;
1069 chn = NULL;
1070
1071 if (IOCGROUP(cmd) == 'M') {
1072 ret = dsp_ioctl_channel(i_dev, PCM_VOLCH(i_dev), cmd, arg);
1073 if (ret != -1) {
1074 PCM_GIANT_EXIT(d);
1075 return (ret);
1076 }
1077
1078 if (d->mixer_dev != NULL) {
1079 PCM_ACQUIRE_QUICK(d);
1080 ret = mixer_ioctl_cmd(d->mixer_dev, cmd, arg, -1, td,
1081 MIXER_CMD_DIRECT);
1082 PCM_RELEASE_QUICK(d);
1083 } else
1084 ret = EBADF;
1085
1086 PCM_GIANT_EXIT(d);
1087
1088 return (ret);
1089 }
1090
1091 /*
1092 * Certain ioctls may be made on any type of device (audio, mixer,
1093 * and MIDI). Handle those special cases here.
1094 */
1095 if (IOCGROUP(cmd) == 'X') {
1096 PCM_ACQUIRE_QUICK(d);
1097 switch(cmd) {
1098 case SNDCTL_SYSINFO:
1099 sound_oss_sysinfo((oss_sysinfo *)arg);
1100 break;
1101 case SNDCTL_CARDINFO:
1102 ret = sound_oss_card_info((oss_card_info *)arg);
1103 break;
1104 case SNDCTL_AUDIOINFO:
1105 case SNDCTL_AUDIOINFO_EX:
1106 case SNDCTL_ENGINEINFO:
1107 ret = dsp_oss_audioinfo(i_dev, (oss_audioinfo *)arg);
1108 break;
1109 case SNDCTL_MIXERINFO:
1110 ret = mixer_oss_mixerinfo(i_dev, (oss_mixerinfo *)arg);
1111 break;
1112 default:
1113 ret = EINVAL;
1114 }
1115 PCM_RELEASE_QUICK(d);
1116 PCM_GIANT_EXIT(d);
1117 return (ret);
1118 }
1119
1120 getchns(i_dev, &rdch, &wrch, 0);
1121
1122 if (wrch != NULL && (wrch->flags & CHN_F_DEAD))
1123 wrch = NULL;
1124 if (rdch != NULL && (rdch->flags & CHN_F_DEAD))
1125 rdch = NULL;
1126
1127 if (wrch == NULL && rdch == NULL) {
1128 PCM_GIANT_EXIT(d);
1129 return (EINVAL);
1130 }
1131
1132 switch(cmd) {
1133#ifdef OLDPCM_IOCTL
1134 /*
1135 * we start with the new ioctl interface.
1136 */
1137 case AIONWRITE: /* how many bytes can write ? */
1138 if (wrch) {
1139 CHN_LOCK(wrch);
1140/*
1141 if (wrch && wrch->bufhard.dl)
1142 while (chn_wrfeed(wrch) == 0);
1143*/
1144 *arg_i = sndbuf_getfree(wrch->bufsoft);
1145 CHN_UNLOCK(wrch);
1146 } else {
1147 *arg_i = 0;
1148 ret = EINVAL;
1149 }
1150 break;
1151
1152 case AIOSSIZE: /* set the current blocksize */
1153 {
1154 struct snd_size *p = (struct snd_size *)arg;
1155
1156 p->play_size = 0;
1157 p->rec_size = 0;
1158 PCM_ACQUIRE_QUICK(d);
1159 if (wrch) {
1160 CHN_LOCK(wrch);
1161 chn_setblocksize(wrch, 2, p->play_size);
1162 p->play_size = sndbuf_getblksz(wrch->bufsoft);
1163 CHN_UNLOCK(wrch);
1164 }
1165 if (rdch) {
1166 CHN_LOCK(rdch);
1167 chn_setblocksize(rdch, 2, p->rec_size);
1168 p->rec_size = sndbuf_getblksz(rdch->bufsoft);
1169 CHN_UNLOCK(rdch);
1170 }
1171 PCM_RELEASE_QUICK(d);
1172 }
1173 break;
1174 case AIOGSIZE: /* get the current blocksize */
1175 {
1176 struct snd_size *p = (struct snd_size *)arg;
1177
1178 if (wrch) {
1179 CHN_LOCK(wrch);
1180 p->play_size = sndbuf_getblksz(wrch->bufsoft);
1181 CHN_UNLOCK(wrch);
1182 }
1183 if (rdch) {
1184 CHN_LOCK(rdch);
1185 p->rec_size = sndbuf_getblksz(rdch->bufsoft);
1186 CHN_UNLOCK(rdch);
1187 }
1188 }
1189 break;
1190
1191 case AIOSFMT:
1192 case AIOGFMT:
1193 {
1194 snd_chan_param *p = (snd_chan_param *)arg;
1195
1196 if (cmd == AIOSFMT &&
1197 ((p->play_format != 0 && p->play_rate == 0) ||
1198 (p->rec_format != 0 && p->rec_rate == 0))) {
1199 ret = EINVAL;
1200 break;
1201 }
1202 PCM_ACQUIRE_QUICK(d);
1203 if (wrch) {
1204 CHN_LOCK(wrch);
1205 if (cmd == AIOSFMT && p->play_format != 0) {
1206 chn_setformat(wrch,
1207 SND_FORMAT(p->play_format,
1208 AFMT_CHANNEL(wrch->format),
1209 AFMT_EXTCHANNEL(wrch->format)));
1210 chn_setspeed(wrch, p->play_rate);
1211 }
1212 p->play_rate = wrch->speed;
1213 p->play_format = AFMT_ENCODING(wrch->format);
1214 CHN_UNLOCK(wrch);
1215 } else {
1216 p->play_rate = 0;
1217 p->play_format = 0;
1218 }
1219 if (rdch) {
1220 CHN_LOCK(rdch);
1221 if (cmd == AIOSFMT && p->rec_format != 0) {
1222 chn_setformat(rdch,
1223 SND_FORMAT(p->rec_format,
1224 AFMT_CHANNEL(rdch->format),
1225 AFMT_EXTCHANNEL(rdch->format)));
1226 chn_setspeed(rdch, p->rec_rate);
1227 }
1228 p->rec_rate = rdch->speed;
1229 p->rec_format = AFMT_ENCODING(rdch->format);
1230 CHN_UNLOCK(rdch);
1231 } else {
1232 p->rec_rate = 0;
1233 p->rec_format = 0;
1234 }
1235 PCM_RELEASE_QUICK(d);
1236 }
1237 break;
1238
1239 case AIOGCAP: /* get capabilities */
1240 {
1241 snd_capabilities *p = (snd_capabilities *)arg;
1242 struct pcmchan_caps *pcaps = NULL, *rcaps = NULL;
1243 struct cdev *pdev;
1244
1245 PCM_LOCK(d);
1246 if (rdch) {
1247 CHN_LOCK(rdch);
1248 rcaps = chn_getcaps(rdch);
1249 }
1250 if (wrch) {
1251 CHN_LOCK(wrch);
1252 pcaps = chn_getcaps(wrch);
1253 }
1254 p->rate_min = max(rcaps? rcaps->minspeed : 0,
1255 pcaps? pcaps->minspeed : 0);
1256 p->rate_max = min(rcaps? rcaps->maxspeed : 1000000,
1257 pcaps? pcaps->maxspeed : 1000000);
1258 p->bufsize = min(rdch? sndbuf_getsize(rdch->bufsoft) : 1000000,
1259 wrch? sndbuf_getsize(wrch->bufsoft) : 1000000);
1260 /* XXX bad on sb16 */
1261 p->formats = (rdch? chn_getformats(rdch) : 0xffffffff) &
1262 (wrch? chn_getformats(wrch) : 0xffffffff);
1263 if (rdch && wrch)
1264 p->formats |= (dsp_get_flags(i_dev) & SD_F_SIMPLEX)? 0 : AFMT_FULLDUPLEX;
1265 pdev = d->mixer_dev;
1266 p->mixers = 1; /* default: one mixer */
1267 p->inputs = pdev->si_drv1? mix_getdevs(pdev->si_drv1) : 0;
1268 p->left = p->right = 100;
1269 if (wrch)
1270 CHN_UNLOCK(wrch);
1271 if (rdch)
1272 CHN_UNLOCK(rdch);
1273 PCM_UNLOCK(d);
1274 }
1275 break;
1276
1277 case AIOSTOP:
1278 if (*arg_i == AIOSYNC_PLAY && wrch) {
1279 CHN_LOCK(wrch);
1280 *arg_i = chn_abort(wrch);
1281 CHN_UNLOCK(wrch);
1282 } else if (*arg_i == AIOSYNC_CAPTURE && rdch) {
1283 CHN_LOCK(rdch);
1284 *arg_i = chn_abort(rdch);
1285 CHN_UNLOCK(rdch);
1286 } else {
1287 printf("AIOSTOP: bad channel 0x%x\n", *arg_i);
1288 *arg_i = 0;
1289 }
1290 break;
1291
1292 case AIOSYNC:
1293 printf("AIOSYNC chan 0x%03lx pos %lu unimplemented\n",
1294 ((snd_sync_parm *)arg)->chan, ((snd_sync_parm *)arg)->pos);
1295 break;
1296#endif
1297 /*
1298 * here follow the standard ioctls (filio.h etc.)
1299 */
1300 case FIONREAD: /* get # bytes to read */
1301 if (rdch) {
1302 CHN_LOCK(rdch);
1303/* if (rdch && rdch->bufhard.dl)
1304 while (chn_rdfeed(rdch) == 0);
1305*/
1306 *arg_i = sndbuf_getready(rdch->bufsoft);
1307 CHN_UNLOCK(rdch);
1308 } else {
1309 *arg_i = 0;
1310 ret = EINVAL;
1311 }
1312 break;
1313
1314 case FIOASYNC: /*set/clear async i/o */
1315 DEB( printf("FIOASYNC\n") ; )
1316 break;
1317
1318 case SNDCTL_DSP_NONBLOCK: /* set non-blocking i/o */
1319 case FIONBIO: /* set/clear non-blocking i/o */
1320 if (rdch) {
1321 CHN_LOCK(rdch);
1322 if (cmd == SNDCTL_DSP_NONBLOCK || *arg_i)
1323 rdch->flags |= CHN_F_NBIO;
1324 else
1325 rdch->flags &= ~CHN_F_NBIO;
1326 CHN_UNLOCK(rdch);
1327 }
1328 if (wrch) {
1329 CHN_LOCK(wrch);
1330 if (cmd == SNDCTL_DSP_NONBLOCK || *arg_i)
1331 wrch->flags |= CHN_F_NBIO;
1332 else
1333 wrch->flags &= ~CHN_F_NBIO;
1334 CHN_UNLOCK(wrch);
1335 }
1336 break;
1337
1338 /*
1339 * Finally, here is the linux-compatible ioctl interface
1340 */
1341#define THE_REAL_SNDCTL_DSP_GETBLKSIZE _IOWR('P', 4, int)
1342 case THE_REAL_SNDCTL_DSP_GETBLKSIZE:
1343 case SNDCTL_DSP_GETBLKSIZE:
1344 chn = wrch ? wrch : rdch;
1345 if (chn) {
1346 CHN_LOCK(chn);
1347 *arg_i = sndbuf_getblksz(chn->bufsoft);
1348 CHN_UNLOCK(chn);
1349 } else {
1350 *arg_i = 0;
1351 ret = EINVAL;
1352 }
1353 break;
1354
1355 case SNDCTL_DSP_SETBLKSIZE:
1356 RANGE(*arg_i, 16, 65536);
1357 PCM_ACQUIRE_QUICK(d);
1358 if (wrch) {
1359 CHN_LOCK(wrch);
1360 chn_setblocksize(wrch, 2, *arg_i);
1361 CHN_UNLOCK(wrch);
1362 }
1363 if (rdch) {
1364 CHN_LOCK(rdch);
1365 chn_setblocksize(rdch, 2, *arg_i);
1366 CHN_UNLOCK(rdch);
1367 }
1368 PCM_RELEASE_QUICK(d);
1369 break;
1370
1371 case SNDCTL_DSP_RESET:
1372 DEB(printf("dsp reset\n"));
1373 if (wrch) {
1374 CHN_LOCK(wrch);
1375 chn_abort(wrch);
1376 chn_resetbuf(wrch);
1377 CHN_UNLOCK(wrch);
1378 }
1379 if (rdch) {
1380 CHN_LOCK(rdch);
1381 chn_abort(rdch);
1382 chn_resetbuf(rdch);
1383 CHN_UNLOCK(rdch);
1384 }
1385 break;
1386
1387 case SNDCTL_DSP_SYNC:
1388 DEB(printf("dsp sync\n"));
1389 /* chn_sync may sleep */
1390 if (wrch) {
1391 CHN_LOCK(wrch);
1392 chn_sync(wrch, 0);
1393 CHN_UNLOCK(wrch);
1394 }
1395 break;
1396
1397 case SNDCTL_DSP_SPEED:
1398 /* chn_setspeed may sleep */
1399 tmp = 0;
1400 PCM_ACQUIRE_QUICK(d);
1401 if (wrch) {
1402 CHN_LOCK(wrch);
1403 ret = chn_setspeed(wrch, *arg_i);
1404 tmp = wrch->speed;
1405 CHN_UNLOCK(wrch);
1406 }
1407 if (rdch && ret == 0) {
1408 CHN_LOCK(rdch);
1409 ret = chn_setspeed(rdch, *arg_i);
1410 if (tmp == 0)
1411 tmp = rdch->speed;
1412 CHN_UNLOCK(rdch);
1413 }
1414 PCM_RELEASE_QUICK(d);
1415 *arg_i = tmp;
1416 break;
1417
1418 case SOUND_PCM_READ_RATE:
1419 chn = wrch ? wrch : rdch;
1420 if (chn) {
1421 CHN_LOCK(chn);
1422 *arg_i = chn->speed;
1423 CHN_UNLOCK(chn);
1424 } else {
1425 *arg_i = 0;
1426 ret = EINVAL;
1427 }
1428 break;
1429
1430 case SNDCTL_DSP_STEREO:
1431 tmp = -1;
1432 *arg_i = (*arg_i)? 2 : 1;
1433 PCM_ACQUIRE_QUICK(d);
1434 if (wrch) {
1435 CHN_LOCK(wrch);
1436 ret = chn_setformat(wrch,
1437 SND_FORMAT(wrch->format, *arg_i, 0));
1438 tmp = (AFMT_CHANNEL(wrch->format) > 1)? 1 : 0;
1439 CHN_UNLOCK(wrch);
1440 }
1441 if (rdch && ret == 0) {
1442 CHN_LOCK(rdch);
1443 ret = chn_setformat(rdch,
1444 SND_FORMAT(rdch->format, *arg_i, 0));
1445 if (tmp == -1)
1446 tmp = (AFMT_CHANNEL(rdch->format) > 1)? 1 : 0;
1447 CHN_UNLOCK(rdch);
1448 }
1449 PCM_RELEASE_QUICK(d);
1450 *arg_i = tmp;
1451 break;
1452
1453 case SOUND_PCM_WRITE_CHANNELS:
1454/* case SNDCTL_DSP_CHANNELS: ( == SOUND_PCM_WRITE_CHANNELS) */
1455 if (*arg_i < 0) {
1456 *arg_i = 0;
1457 ret = EINVAL;
1458 break;
1459 }
1460 if (*arg_i != 0) {
1461 struct pcmchan_matrix *m;
1462 uint32_t ext;
1463
1464 tmp = 0;
1465 if (*arg_i > SND_CHN_MAX)
1466 *arg_i = SND_CHN_MAX;
1467
1468 m = feeder_matrix_default_channel_map(*arg_i);
1469 if (m != NULL)
1470 ext = m->ext;
1471 else
1472 ext = 0;
1473
1474 PCM_ACQUIRE_QUICK(d);
1475 if (wrch) {
1476 CHN_LOCK(wrch);
1477 ret = chn_setformat(wrch,
1478 SND_FORMAT(wrch->format, *arg_i, ext));
1479 tmp = AFMT_CHANNEL(wrch->format);
1480 CHN_UNLOCK(wrch);
1481 }
1482 if (rdch && ret == 0) {
1483 CHN_LOCK(rdch);
1484 ret = chn_setformat(rdch,
1485 SND_FORMAT(rdch->format, *arg_i, ext));
1486 if (tmp == 0)
1487 tmp = AFMT_CHANNEL(rdch->format);
1488 CHN_UNLOCK(rdch);
1489 }
1490 PCM_RELEASE_QUICK(d);
1491 *arg_i = tmp;
1492 } else {
1493 chn = wrch ? wrch : rdch;
1494 CHN_LOCK(chn);
1495 *arg_i = AFMT_CHANNEL(chn->format);
1496 CHN_UNLOCK(chn);
1497 }
1498 break;
1499
1500 case SOUND_PCM_READ_CHANNELS:
1501 chn = wrch ? wrch : rdch;
1502 if (chn) {
1503 CHN_LOCK(chn);
1504 *arg_i = AFMT_CHANNEL(chn->format);
1505 CHN_UNLOCK(chn);
1506 } else {
1507 *arg_i = 0;
1508 ret = EINVAL;
1509 }
1510 break;
1511
1512 case SNDCTL_DSP_GETFMTS: /* returns a mask of supported fmts */
1513 chn = wrch ? wrch : rdch;
1514 if (chn) {
1515 CHN_LOCK(chn);
1516 *arg_i = chn_getformats(chn);
1517 CHN_UNLOCK(chn);
1518 } else {
1519 *arg_i = 0;
1520 ret = EINVAL;
1521 }
1522 break;
1523
1524 case SNDCTL_DSP_SETFMT: /* sets _one_ format */
1525 if (*arg_i != AFMT_QUERY) {
1526 tmp = 0;
1527 PCM_ACQUIRE_QUICK(d);
1528 if (wrch) {
1529 CHN_LOCK(wrch);
1530 ret = chn_setformat(wrch, SND_FORMAT(*arg_i,
1531 AFMT_CHANNEL(wrch->format),
1532 AFMT_EXTCHANNEL(wrch->format)));
1533 tmp = wrch->format;
1534 CHN_UNLOCK(wrch);
1535 }
1536 if (rdch && ret == 0) {
1537 CHN_LOCK(rdch);
1538 ret = chn_setformat(rdch, SND_FORMAT(*arg_i,
1539 AFMT_CHANNEL(rdch->format),
1540 AFMT_EXTCHANNEL(rdch->format)));
1541 if (tmp == 0)
1542 tmp = rdch->format;
1543 CHN_UNLOCK(rdch);
1544 }
1545 PCM_RELEASE_QUICK(d);
1546 *arg_i = AFMT_ENCODING(tmp);
1547 } else {
1548 chn = wrch ? wrch : rdch;
1549 CHN_LOCK(chn);
1550 *arg_i = AFMT_ENCODING(chn->format);
1551 CHN_UNLOCK(chn);
1552 }
1553 break;
1554
1555 case SNDCTL_DSP_SETFRAGMENT:
1556 DEB(printf("SNDCTL_DSP_SETFRAGMENT 0x%08x\n", *(int *)arg));
1557 {
1558 uint32_t fragln = (*arg_i) & 0x0000ffff;
1559 uint32_t maxfrags = ((*arg_i) & 0xffff0000) >> 16;
1560 uint32_t fragsz;
1561 uint32_t r_maxfrags, r_fragsz;
1562
1563 RANGE(fragln, 4, 16);
1564 fragsz = 1 << fragln;
1565
1566 if (maxfrags == 0)
1567 maxfrags = CHN_2NDBUFMAXSIZE / fragsz;
1568 if (maxfrags < 2)
1569 maxfrags = 2;
1570 if (maxfrags * fragsz > CHN_2NDBUFMAXSIZE)
1571 maxfrags = CHN_2NDBUFMAXSIZE / fragsz;
1572
1573 DEB(printf("SNDCTL_DSP_SETFRAGMENT %d frags, %d sz\n", maxfrags, fragsz));
1574 PCM_ACQUIRE_QUICK(d);
1575 if (rdch) {
1576 CHN_LOCK(rdch);
1577 ret = chn_setblocksize(rdch, maxfrags, fragsz);
1578 r_maxfrags = sndbuf_getblkcnt(rdch->bufsoft);
1579 r_fragsz = sndbuf_getblksz(rdch->bufsoft);
1580 CHN_UNLOCK(rdch);
1581 } else {
1582 r_maxfrags = maxfrags;
1583 r_fragsz = fragsz;
1584 }
1585 if (wrch && ret == 0) {
1586 CHN_LOCK(wrch);
1587 ret = chn_setblocksize(wrch, maxfrags, fragsz);
1588 maxfrags = sndbuf_getblkcnt(wrch->bufsoft);
1589 fragsz = sndbuf_getblksz(wrch->bufsoft);
1590 CHN_UNLOCK(wrch);
1591 } else { /* use whatever came from the read channel */
1592 maxfrags = r_maxfrags;
1593 fragsz = r_fragsz;
1594 }
1595 PCM_RELEASE_QUICK(d);
1596
1597 fragln = 0;
1598 while (fragsz > 1) {
1599 fragln++;
1600 fragsz >>= 1;
1601 }
1602 *arg_i = (maxfrags << 16) | fragln;
1603 }
1604 break;
1605
1606 case SNDCTL_DSP_GETISPACE:
1607 /* return the size of data available in the input queue */
1608 {
1609 audio_buf_info *a = (audio_buf_info *)arg;
1610 if (rdch) {
1611 struct snd_dbuf *bs = rdch->bufsoft;
1612
1613 CHN_LOCK(rdch);
1614 a->bytes = sndbuf_getready(bs);
1615 a->fragments = a->bytes / sndbuf_getblksz(bs);
1616 a->fragstotal = sndbuf_getblkcnt(bs);
1617 a->fragsize = sndbuf_getblksz(bs);
1618 CHN_UNLOCK(rdch);
1619 } else
1620 ret = EINVAL;
1621 }
1622 break;
1623
1624 case SNDCTL_DSP_GETOSPACE:
1625 /* return space available in the output queue */
1626 {
1627 audio_buf_info *a = (audio_buf_info *)arg;
1628 if (wrch) {
1629 struct snd_dbuf *bs = wrch->bufsoft;
1630
1631 CHN_LOCK(wrch);
1632 /* XXX abusive DMA update: chn_wrupdate(wrch); */
1633 a->bytes = sndbuf_getfree(bs);
1634 a->fragments = a->bytes / sndbuf_getblksz(bs);
1635 a->fragstotal = sndbuf_getblkcnt(bs);
1636 a->fragsize = sndbuf_getblksz(bs);
1637 CHN_UNLOCK(wrch);
1638 } else
1639 ret = EINVAL;
1640 }
1641 break;
1642
1643 case SNDCTL_DSP_GETIPTR:
1644 {
1645 count_info *a = (count_info *)arg;
1646 if (rdch) {
1647 struct snd_dbuf *bs = rdch->bufsoft;
1648
1649 CHN_LOCK(rdch);
1650 /* XXX abusive DMA update: chn_rdupdate(rdch); */
1651 a->bytes = sndbuf_gettotal(bs);
1652 a->blocks = sndbuf_getblocks(bs) - rdch->blocks;
1653 a->ptr = sndbuf_getreadyptr(bs);
1654 rdch->blocks = sndbuf_getblocks(bs);
1655 CHN_UNLOCK(rdch);
1656 } else
1657 ret = EINVAL;
1658 }
1659 break;
1660
1661 case SNDCTL_DSP_GETOPTR:
1662 {
1663 count_info *a = (count_info *)arg;
1664 if (wrch) {
1665 struct snd_dbuf *bs = wrch->bufsoft;
1666
1667 CHN_LOCK(wrch);
1668 /* XXX abusive DMA update: chn_wrupdate(wrch); */
1669 a->bytes = sndbuf_gettotal(bs);
1670 a->blocks = sndbuf_getblocks(bs) - wrch->blocks;
1671 a->ptr = sndbuf_getreadyptr(bs);
1672 wrch->blocks = sndbuf_getblocks(bs);
1673 CHN_UNLOCK(wrch);
1674 } else
1675 ret = EINVAL;
1676 }
1677 break;
1678
1679 case SNDCTL_DSP_GETCAPS:
1680 PCM_LOCK(d);
1681 *arg_i = PCM_CAP_REALTIME | PCM_CAP_MMAP | PCM_CAP_TRIGGER;
1682 if (rdch && wrch && !(dsp_get_flags(i_dev) & SD_F_SIMPLEX))
1683 *arg_i |= PCM_CAP_DUPLEX;
1684 PCM_UNLOCK(d);
1685 break;
1686
1687 case SOUND_PCM_READ_BITS:
1688 chn = wrch ? wrch : rdch;
1689 if (chn) {
1690 CHN_LOCK(chn);
1691 if (chn->format & AFMT_8BIT)
1692 *arg_i = 8;
1693 else if (chn->format & AFMT_16BIT)
1694 *arg_i = 16;
1695 else if (chn->format & AFMT_24BIT)
1696 *arg_i = 24;
1697 else if (chn->format & AFMT_32BIT)
1698 *arg_i = 32;
1699 else
1700 ret = EINVAL;
1701 CHN_UNLOCK(chn);
1702 } else {
1703 *arg_i = 0;
1704 ret = EINVAL;
1705 }
1706 break;
1707
1708 case SNDCTL_DSP_SETTRIGGER:
1709 if (rdch) {
1710 CHN_LOCK(rdch);
1711 rdch->flags &= ~CHN_F_NOTRIGGER;
1712 if (*arg_i & PCM_ENABLE_INPUT)
1713 chn_start(rdch, 1);
1714 else {
1715 chn_abort(rdch);
1716 chn_resetbuf(rdch);
1717 rdch->flags |= CHN_F_NOTRIGGER;
1718 }
1719 CHN_UNLOCK(rdch);
1720 }
1721 if (wrch) {
1722 CHN_LOCK(wrch);
1723 wrch->flags &= ~CHN_F_NOTRIGGER;
1724 if (*arg_i & PCM_ENABLE_OUTPUT)
1725 chn_start(wrch, 1);
1726 else {
1727 chn_abort(wrch);
1728 chn_resetbuf(wrch);
1729 wrch->flags |= CHN_F_NOTRIGGER;
1730 }
1731 CHN_UNLOCK(wrch);
1732 }
1733 break;
1734
1735 case SNDCTL_DSP_GETTRIGGER:
1736 *arg_i = 0;
1737 if (wrch) {
1738 CHN_LOCK(wrch);
1739 if (wrch->flags & CHN_F_TRIGGERED)
1740 *arg_i |= PCM_ENABLE_OUTPUT;
1741 CHN_UNLOCK(wrch);
1742 }
1743 if (rdch) {
1744 CHN_LOCK(rdch);
1745 if (rdch->flags & CHN_F_TRIGGERED)
1746 *arg_i |= PCM_ENABLE_INPUT;
1747 CHN_UNLOCK(rdch);
1748 }
1749 break;
1750
1751 case SNDCTL_DSP_GETODELAY:
1752 if (wrch) {
1753 struct snd_dbuf *bs = wrch->bufsoft;
1754
1755 CHN_LOCK(wrch);
1756 /* XXX abusive DMA update: chn_wrupdate(wrch); */
1757 *arg_i = sndbuf_getready(bs);
1758 CHN_UNLOCK(wrch);
1759 } else
1760 ret = EINVAL;
1761 break;
1762
1763 case SNDCTL_DSP_POST:
1764 if (wrch) {
1765 CHN_LOCK(wrch);
1766 wrch->flags &= ~CHN_F_NOTRIGGER;
1767 chn_start(wrch, 1);
1768 CHN_UNLOCK(wrch);
1769 }
1770 break;
1771
1772 case SNDCTL_DSP_SETDUPLEX:
1773 /*
1774 * switch to full-duplex mode if card is in half-duplex
1775 * mode and is able to work in full-duplex mode
1776 */
1777 PCM_LOCK(d);
1778 if (rdch && wrch && (dsp_get_flags(i_dev) & SD_F_SIMPLEX))
1779 dsp_set_flags(i_dev, dsp_get_flags(i_dev)^SD_F_SIMPLEX);
1780 PCM_UNLOCK(d);
1781 break;
1782
1783 /*
1784 * The following four ioctls are simple wrappers around mixer_ioctl
1785 * with no further processing. xcmd is short for "translated
1786 * command".
1787 */
1788 case SNDCTL_DSP_GETRECVOL:
1789 if (xcmd == 0) {
1790 xcmd = SOUND_MIXER_READ_RECLEV;
1791 chn = rdch;
1792 }
1793 /* FALLTHROUGH */
1794 case SNDCTL_DSP_SETRECVOL:
1795 if (xcmd == 0) {
1796 xcmd = SOUND_MIXER_WRITE_RECLEV;
1797 chn = rdch;
1798 }
1799 /* FALLTHROUGH */
1800 case SNDCTL_DSP_GETPLAYVOL:
1801 if (xcmd == 0) {
1802 xcmd = SOUND_MIXER_READ_PCM;
1803 chn = wrch;
1804 }
1805 /* FALLTHROUGH */
1806 case SNDCTL_DSP_SETPLAYVOL:
1807 if (xcmd == 0) {
1808 xcmd = SOUND_MIXER_WRITE_PCM;
1809 chn = wrch;
1810 }
1811
1812 ret = dsp_ioctl_channel(i_dev, chn, xcmd, arg);
1813 if (ret != -1) {
1814 PCM_GIANT_EXIT(d);
1815 return (ret);
1816 }
1817
1818 if (d->mixer_dev != NULL) {
1819 PCM_ACQUIRE_QUICK(d);
1820 ret = mixer_ioctl_cmd(d->mixer_dev, xcmd, arg, -1, td,
1821 MIXER_CMD_DIRECT);
1822 PCM_RELEASE_QUICK(d);
1823 } else
1824 ret = ENOTSUP;
1825
1826 break;
1827
1828 case SNDCTL_DSP_GET_RECSRC_NAMES:
1829 case SNDCTL_DSP_GET_RECSRC:
1830 case SNDCTL_DSP_SET_RECSRC:
1831 if (d->mixer_dev != NULL) {
1832 PCM_ACQUIRE_QUICK(d);
1833 ret = mixer_ioctl_cmd(d->mixer_dev, cmd, arg, -1, td,
1834 MIXER_CMD_DIRECT);
1835 PCM_RELEASE_QUICK(d);
1836 } else
1837 ret = ENOTSUP;
1838 break;
1839
1840 /*
1841 * The following 3 ioctls aren't very useful at the moment. For
1842 * now, only a single channel is associated with a cdev (/dev/dspN
1843 * instance), so there's only a single output routing to use (i.e.,
1844 * the wrch bound to this cdev).
1845 */
1846 case SNDCTL_DSP_GET_PLAYTGT_NAMES:
1847 {
1848 oss_mixer_enuminfo *ei;
1849 ei = (oss_mixer_enuminfo *)arg;
1850 ei->dev = 0;
1851 ei->ctrl = 0;
1852 ei->version = 0; /* static for now */
1853 ei->strindex[0] = 0;
1854
1855 if (wrch != NULL) {
1856 ei->nvalues = 1;
1857 strlcpy(ei->strings, wrch->name,
1858 sizeof(ei->strings));
1859 } else {
1860 ei->nvalues = 0;
1861 ei->strings[0] = '\0';
1862 }
1863 }
1864 break;
1865 case SNDCTL_DSP_GET_PLAYTGT:
1866 case SNDCTL_DSP_SET_PLAYTGT: /* yes, they are the same for now */
1867 /*
1868 * Re: SET_PLAYTGT
1869 * OSSv4: "The value that was accepted by the device will
1870 * be returned back in the variable pointed by the
1871 * argument."
1872 */
1873 if (wrch != NULL)
1874 *arg_i = 0;
1875 else
1876 ret = EINVAL;
1877 break;
1878
1879 case SNDCTL_DSP_SILENCE:
1880 /*
1881 * Flush the software (pre-feed) buffer, but try to minimize playback
1882 * interruption. (I.e., record unplayed samples with intent to
1883 * restore by SNDCTL_DSP_SKIP.) Intended for application "pause"
1884 * functionality.
1885 */
1886 if (wrch == NULL)
1887 ret = EINVAL;
1888 else {
1889 struct snd_dbuf *bs;
1890 CHN_LOCK(wrch);
1891 while (wrch->inprog != 0)
1892 cv_wait(&wrch->cv, wrch->lock);
1893 bs = wrch->bufsoft;
1894 if ((bs->shadbuf != NULL) && (sndbuf_getready(bs) > 0)) {
1895 bs->sl = sndbuf_getready(bs);
1896 sndbuf_dispose(bs, bs->shadbuf, sndbuf_getready(bs));
1897 sndbuf_fillsilence(bs);
1898 chn_start(wrch, 0);
1899 }
1900 CHN_UNLOCK(wrch);
1901 }
1902 break;
1903
1904 case SNDCTL_DSP_SKIP:
1905 /*
1906 * OSSv4 docs: "This ioctl call discards all unplayed samples in the
1907 * playback buffer by moving the current write position immediately
1908 * before the point where the device is currently reading the samples."
1909 */
1910 if (wrch == NULL)
1911 ret = EINVAL;
1912 else {
1913 struct snd_dbuf *bs;
1914 CHN_LOCK(wrch);
1915 while (wrch->inprog != 0)
1916 cv_wait(&wrch->cv, wrch->lock);
1917 bs = wrch->bufsoft;
1918 if ((bs->shadbuf != NULL) && (bs->sl > 0)) {
1919 sndbuf_softreset(bs);
1920 sndbuf_acquire(bs, bs->shadbuf, bs->sl);
1921 bs->sl = 0;
1922 chn_start(wrch, 0);
1923 }
1924 CHN_UNLOCK(wrch);
1925 }
1926 break;
1927
1928 case SNDCTL_DSP_CURRENT_OPTR:
1929 case SNDCTL_DSP_CURRENT_IPTR:
1930 /**
1931 * @note Changing formats resets the buffer counters, which differs
1932 * from the 4Front drivers. However, I don't expect this to be
1933 * much of a problem.
1934 *
1935 * @note In a test where @c CURRENT_OPTR is called immediately after write
1936 * returns, this driver is about 32K samples behind whereas
1937 * 4Front's is about 8K samples behind. Should determine source
1938 * of discrepancy, even if only out of curiosity.
1939 *
1940 * @todo Actually test SNDCTL_DSP_CURRENT_IPTR.
1941 */
1942 chn = (cmd == SNDCTL_DSP_CURRENT_OPTR) ? wrch : rdch;
1943 if (chn == NULL)
1944 ret = EINVAL;
1945 else {
1946 struct snd_dbuf *bs;
1947 /* int tmp; */
1948
1949 oss_count_t *oc = (oss_count_t *)arg;
1950
1951 CHN_LOCK(chn);
1952 bs = chn->bufsoft;
1953#if 0
1954 tmp = (sndbuf_getsize(b) + chn_getptr(chn) - sndbuf_gethwptr(b)) % sndbuf_getsize(b);
1955 oc->samples = (sndbuf_gettotal(b) + tmp) / sndbuf_getalign(b);
1956 oc->fifo_samples = (sndbuf_getready(b) - tmp) / sndbuf_getalign(b);
1957#else
1958 oc->samples = sndbuf_gettotal(bs) / sndbuf_getalign(bs);
1959 oc->fifo_samples = sndbuf_getready(bs) / sndbuf_getalign(bs);
1960#endif
1961 CHN_UNLOCK(chn);
1962 }
1963 break;
1964
1965 case SNDCTL_DSP_HALT_OUTPUT:
1966 case SNDCTL_DSP_HALT_INPUT:
1967 chn = (cmd == SNDCTL_DSP_HALT_OUTPUT) ? wrch : rdch;
1968 if (chn == NULL)
1969 ret = EINVAL;
1970 else {
1971 CHN_LOCK(chn);
1972 chn_abort(chn);
1973 CHN_UNLOCK(chn);
1974 }
1975 break;
1976
1977 case SNDCTL_DSP_LOW_WATER:
1978 /*
1979 * Set the number of bytes required to attract attention by
1980 * select/poll.
1981 */
1982 if (wrch != NULL) {
1983 CHN_LOCK(wrch);
1984 wrch->lw = (*arg_i > 1) ? *arg_i : 1;
1985 CHN_UNLOCK(wrch);
1986 }
1987 if (rdch != NULL) {
1988 CHN_LOCK(rdch);
1989 rdch->lw = (*arg_i > 1) ? *arg_i : 1;
1990 CHN_UNLOCK(rdch);
1991 }
1992 break;
1993
1994 case SNDCTL_DSP_GETERROR:
1995 /*
1996 * OSSv4 docs: "All errors and counters will automatically be
1997 * cleared to zeroes after the call so each call will return only
1998 * the errors that occurred after the previous invocation. ... The
1999 * play_underruns and rec_overrun fields are the only usefull fields
2000 * returned by OSS 4.0."
2001 */
2002 {
2003 audio_errinfo *ei = (audio_errinfo *)arg;
2004
2005 bzero((void *)ei, sizeof(*ei));
2006
2007 if (wrch != NULL) {
2008 CHN_LOCK(wrch);
2009 ei->play_underruns = wrch->xruns;
2010 wrch->xruns = 0;
2011 CHN_UNLOCK(wrch);
2012 }
2013 if (rdch != NULL) {
2014 CHN_LOCK(rdch);
2015 ei->rec_overruns = rdch->xruns;
2016 rdch->xruns = 0;
2017 CHN_UNLOCK(rdch);
2018 }
2019 }
2020 break;
2021
2022 case SNDCTL_DSP_SYNCGROUP:
2023 PCM_ACQUIRE_QUICK(d);
2024 ret = dsp_oss_syncgroup(wrch, rdch, (oss_syncgroup *)arg);
2025 PCM_RELEASE_QUICK(d);
2026 break;
2027
2028 case SNDCTL_DSP_SYNCSTART:
2029 PCM_ACQUIRE_QUICK(d);
2030 ret = dsp_oss_syncstart(*arg_i);
2031 PCM_RELEASE_QUICK(d);
2032 break;
2033
2034 case SNDCTL_DSP_POLICY:
2035 PCM_ACQUIRE_QUICK(d);
2036 ret = dsp_oss_policy(wrch, rdch, *arg_i);
2037 PCM_RELEASE_QUICK(d);
2038 break;
2039
2040 case SNDCTL_DSP_COOKEDMODE:
2041 PCM_ACQUIRE_QUICK(d);
2042 if (!(dsp_get_flags(i_dev) & SD_F_BITPERFECT))
2043 ret = dsp_oss_cookedmode(wrch, rdch, *arg_i);
2044 PCM_RELEASE_QUICK(d);
2045 break;
2046 case SNDCTL_DSP_GET_CHNORDER:
2047 PCM_ACQUIRE_QUICK(d);
2048 ret = dsp_oss_getchnorder(wrch, rdch, (unsigned long long *)arg);
2049 PCM_RELEASE_QUICK(d);
2050 break;
2051 case SNDCTL_DSP_SET_CHNORDER:
2052 PCM_ACQUIRE_QUICK(d);
2053 ret = dsp_oss_setchnorder(wrch, rdch, (unsigned long long *)arg);
2054 PCM_RELEASE_QUICK(d);
2055 break;
2056 case SNDCTL_DSP_GETCHANNELMASK: /* XXX vlc */
2057 PCM_ACQUIRE_QUICK(d);
2058 ret = dsp_oss_getchannelmask(wrch, rdch, (int *)arg);
2059 PCM_RELEASE_QUICK(d);
2060 break;
2061 case SNDCTL_DSP_BIND_CHANNEL: /* XXX what?!? */
2062 ret = EINVAL;
2063 break;
2064#ifdef OSSV4_EXPERIMENT
2065 /*
2066 * XXX The following ioctls are not yet supported and just return
2067 * EINVAL.
2068 */
2069 case SNDCTL_DSP_GETOPEAKS:
2070 case SNDCTL_DSP_GETIPEAKS:
2071 chn = (cmd == SNDCTL_DSP_GETOPEAKS) ? wrch : rdch;
2072 if (chn == NULL)
2073 ret = EINVAL;
2074 else {
2075 oss_peaks_t *op = (oss_peaks_t *)arg;
2076 int lpeak, rpeak;
2077
2078 CHN_LOCK(chn);
2079 ret = chn_getpeaks(chn, &lpeak, &rpeak);
2080 if (ret == -1)
2081 ret = EINVAL;
2082 else {
2083 (*op)[0] = lpeak;
2084 (*op)[1] = rpeak;
2085 }
2086 CHN_UNLOCK(chn);
2087 }
2088 break;
2089
2090 /*
2091 * XXX Once implemented, revisit this for proper cv protection
2092 * (if necessary).
2093 */
2094 case SNDCTL_GETLABEL:
2095 ret = dsp_oss_getlabel(wrch, rdch, (oss_label_t *)arg);
2096 break;
2097 case SNDCTL_SETLABEL:
2098 ret = dsp_oss_setlabel(wrch, rdch, (oss_label_t *)arg);
2099 break;
2100 case SNDCTL_GETSONG:
2101 ret = dsp_oss_getsong(wrch, rdch, (oss_longname_t *)arg);
2102 break;
2103 case SNDCTL_SETSONG:
2104 ret = dsp_oss_setsong(wrch, rdch, (oss_longname_t *)arg);
2105 break;
2106 case SNDCTL_SETNAME:
2107 ret = dsp_oss_setname(wrch, rdch, (oss_longname_t *)arg);
2108 break;
2109#if 0
2110 /**
2111 * @note The S/PDIF interface ioctls, @c SNDCTL_DSP_READCTL and
2112 * @c SNDCTL_DSP_WRITECTL have been omitted at the suggestion of
2113 * 4Front Technologies.
2114 */
2115 case SNDCTL_DSP_READCTL:
2116 case SNDCTL_DSP_WRITECTL:
2117 ret = EINVAL;
2118 break;
2119#endif /* !0 (explicitly omitted ioctls) */
2120
2121#endif /* !OSSV4_EXPERIMENT */
2122 case SNDCTL_DSP_MAPINBUF:
2123 case SNDCTL_DSP_MAPOUTBUF:
2124 case SNDCTL_DSP_SETSYNCRO:
2125 /* undocumented */
2126
2127 case SNDCTL_DSP_SUBDIVIDE:
2128 case SOUND_PCM_WRITE_FILTER:
2129 case SOUND_PCM_READ_FILTER:
2130 /* dunno what these do, don't sound important */
2131
2132 default:
2133 DEB(printf("default ioctl fn 0x%08lx fail\n", cmd));
2134 ret = EINVAL;
2135 break;
2136 }
2137
2138 PCM_GIANT_LEAVE(d);
2139
2140 return (ret);
2141}
2142
2143static int
2144dsp_poll(struct cdev *i_dev, int events, struct thread *td)
2145{
2146 struct snddev_info *d;
2147 struct pcm_channel *wrch, *rdch;
2148 int ret, e;
2149
2150 d = dsp_get_info(i_dev);
2151 if (!DSP_REGISTERED(d, i_dev))
2152 return (EBADF);
2153
2154 PCM_GIANT_ENTER(d);
2155
2156 wrch = NULL;
2157 rdch = NULL;
2158 ret = 0;
2159
2160 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
2161
2162 if (wrch != NULL && !(wrch->flags & CHN_F_DEAD)) {
2163 e = (events & (POLLOUT | POLLWRNORM));
2164 if (e)
2165 ret |= chn_poll(wrch, e, td);
2166 }
2167
2168 if (rdch != NULL && !(rdch->flags & CHN_F_DEAD)) {
2169 e = (events & (POLLIN | POLLRDNORM));
2170 if (e)
2171 ret |= chn_poll(rdch, e, td);
2172 }
2173
2174 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
2175
2176 PCM_GIANT_LEAVE(d);
2177
2178 return (ret);
2179}
2180
2181static int
| 38
39static int dsp_mmap_allow_prot_exec = 0;
40SYSCTL_INT(_hw_snd, OID_AUTO, compat_linux_mmap, CTLFLAG_RW,
41 &dsp_mmap_allow_prot_exec, 0,
42 "linux mmap compatibility (-1=force disable 0=auto 1=force enable)");
43
44struct dsp_cdevinfo {
45 struct pcm_channel *rdch, *wrch;
46 struct pcm_channel *volch;
47 int busy, simplex;
48 TAILQ_ENTRY(dsp_cdevinfo) link;
49};
50
51#define PCM_RDCH(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->rdch)
52#define PCM_WRCH(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->wrch)
53#define PCM_VOLCH(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->volch)
54#define PCM_SIMPLEX(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->simplex)
55
56#define DSP_CDEVINFO_CACHESIZE 8
57
58#define DSP_REGISTERED(x, y) (PCM_REGISTERED(x) && \
59 (y) != NULL && (y)->si_drv1 != NULL)
60
61#define OLDPCM_IOCTL
62
63static d_open_t dsp_open;
64static d_close_t dsp_close;
65static d_read_t dsp_read;
66static d_write_t dsp_write;
67static d_ioctl_t dsp_ioctl;
68static d_poll_t dsp_poll;
69static d_mmap_t dsp_mmap;
70
71struct cdevsw dsp_cdevsw = {
72 .d_version = D_VERSION,
73 .d_open = dsp_open,
74 .d_close = dsp_close,
75 .d_read = dsp_read,
76 .d_write = dsp_write,
77 .d_ioctl = dsp_ioctl,
78 .d_poll = dsp_poll,
79 .d_mmap = dsp_mmap,
80 .d_name = "dsp",
81};
82
83static eventhandler_tag dsp_ehtag = NULL;
84static int dsp_umax = -1;
85static int dsp_cmax = -1;
86
87static int dsp_oss_syncgroup(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_syncgroup *group);
88static int dsp_oss_syncstart(int sg_id);
89static int dsp_oss_policy(struct pcm_channel *wrch, struct pcm_channel *rdch, int policy);
90static int dsp_oss_cookedmode(struct pcm_channel *wrch, struct pcm_channel *rdch, int enabled);
91static int dsp_oss_getchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map);
92static int dsp_oss_setchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map);
93static int dsp_oss_getchannelmask(struct pcm_channel *wrch, struct pcm_channel *rdch, int *mask);
94#ifdef OSSV4_EXPERIMENT
95static int dsp_oss_getlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label);
96static int dsp_oss_setlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label);
97static int dsp_oss_getsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song);
98static int dsp_oss_setsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song);
99static int dsp_oss_setname(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *name);
100#endif
101
102static struct snddev_info *
103dsp_get_info(struct cdev *dev)
104{
105 return (devclass_get_softc(pcm_devclass, PCMUNIT(dev)));
106}
107
108static uint32_t
109dsp_get_flags(struct cdev *dev)
110{
111 device_t bdev;
112
113 bdev = devclass_get_device(pcm_devclass, PCMUNIT(dev));
114
115 return ((bdev != NULL) ? pcm_getflags(bdev) : 0xffffffff);
116}
117
118static void
119dsp_set_flags(struct cdev *dev, uint32_t flags)
120{
121 device_t bdev;
122
123 bdev = devclass_get_device(pcm_devclass, PCMUNIT(dev));
124
125 if (bdev != NULL)
126 pcm_setflags(bdev, flags);
127}
128
129/*
130 * return the channels associated with an open device instance.
131 * lock channels specified.
132 */
133static int
134getchns(struct cdev *dev, struct pcm_channel **rdch, struct pcm_channel **wrch,
135 uint32_t prio)
136{
137 struct snddev_info *d;
138 struct pcm_channel *ch;
139 uint32_t flags;
140
141 if (PCM_SIMPLEX(dev) != 0) {
142 d = dsp_get_info(dev);
143 if (!PCM_REGISTERED(d))
144 return (ENXIO);
145 PCM_LOCK(d);
146 PCM_WAIT(d);
147 PCM_ACQUIRE(d);
148 /*
149 * Note: order is important -
150 * pcm flags -> prio query flags -> wild guess
151 */
152 ch = NULL;
153 flags = dsp_get_flags(dev);
154 if (flags & SD_F_PRIO_WR) {
155 ch = PCM_RDCH(dev);
156 PCM_RDCH(dev) = NULL;
157 } else if (flags & SD_F_PRIO_RD) {
158 ch = PCM_WRCH(dev);
159 PCM_WRCH(dev) = NULL;
160 } else if (prio & SD_F_PRIO_WR) {
161 ch = PCM_RDCH(dev);
162 PCM_RDCH(dev) = NULL;
163 flags |= SD_F_PRIO_WR;
164 } else if (prio & SD_F_PRIO_RD) {
165 ch = PCM_WRCH(dev);
166 PCM_WRCH(dev) = NULL;
167 flags |= SD_F_PRIO_RD;
168 } else if (PCM_WRCH(dev) != NULL) {
169 ch = PCM_RDCH(dev);
170 PCM_RDCH(dev) = NULL;
171 flags |= SD_F_PRIO_WR;
172 } else if (PCM_RDCH(dev) != NULL) {
173 ch = PCM_WRCH(dev);
174 PCM_WRCH(dev) = NULL;
175 flags |= SD_F_PRIO_RD;
176 }
177 PCM_SIMPLEX(dev) = 0;
178 dsp_set_flags(dev, flags);
179 if (ch != NULL) {
180 CHN_LOCK(ch);
181 pcm_chnref(ch, -1);
182 pcm_chnrelease(ch);
183 }
184 PCM_RELEASE(d);
185 PCM_UNLOCK(d);
186 }
187
188 *rdch = PCM_RDCH(dev);
189 *wrch = PCM_WRCH(dev);
190
191 if (*rdch != NULL && (prio & SD_F_PRIO_RD))
192 CHN_LOCK(*rdch);
193 if (*wrch != NULL && (prio & SD_F_PRIO_WR))
194 CHN_LOCK(*wrch);
195
196 return (0);
197}
198
199/* unlock specified channels */
200static void
201relchns(struct cdev *dev, struct pcm_channel *rdch, struct pcm_channel *wrch,
202 uint32_t prio)
203{
204 if (wrch != NULL && (prio & SD_F_PRIO_WR))
205 CHN_UNLOCK(wrch);
206 if (rdch != NULL && (prio & SD_F_PRIO_RD))
207 CHN_UNLOCK(rdch);
208}
209
210static void
211dsp_cdevinfo_alloc(struct cdev *dev,
212 struct pcm_channel *rdch, struct pcm_channel *wrch,
213 struct pcm_channel *volch)
214{
215 struct snddev_info *d;
216 struct dsp_cdevinfo *cdi;
217 int simplex;
218
219 d = dsp_get_info(dev);
220
221 KASSERT(PCM_REGISTERED(d) && dev != NULL && dev->si_drv1 == NULL &&
222 ((rdch == NULL && wrch == NULL) || rdch != wrch),
223 ("bogus %s(), what are you trying to accomplish here?", __func__));
224 PCM_BUSYASSERT(d);
225 PCM_LOCKASSERT(d);
226
227 simplex = (dsp_get_flags(dev) & SD_F_SIMPLEX) ? 1 : 0;
228
229 /*
230 * Scan for free instance entry and put it into the end of list.
231 * Create new one if necessary.
232 */
233 TAILQ_FOREACH(cdi, &d->dsp_cdevinfo_pool, link) {
234 if (cdi->busy != 0)
235 break;
236 cdi->rdch = rdch;
237 cdi->wrch = wrch;
238 cdi->volch = volch;
239 cdi->simplex = simplex;
240 cdi->busy = 1;
241 TAILQ_REMOVE(&d->dsp_cdevinfo_pool, cdi, link);
242 TAILQ_INSERT_TAIL(&d->dsp_cdevinfo_pool, cdi, link);
243 dev->si_drv1 = cdi;
244 return;
245 }
246 PCM_UNLOCK(d);
247 cdi = malloc(sizeof(*cdi), M_DEVBUF, M_WAITOK | M_ZERO);
248 PCM_LOCK(d);
249 cdi->rdch = rdch;
250 cdi->wrch = wrch;
251 cdi->volch = volch;
252 cdi->simplex = simplex;
253 cdi->busy = 1;
254 TAILQ_INSERT_TAIL(&d->dsp_cdevinfo_pool, cdi, link);
255 dev->si_drv1 = cdi;
256}
257
258static void
259dsp_cdevinfo_free(struct cdev *dev)
260{
261 struct snddev_info *d;
262 struct dsp_cdevinfo *cdi, *tmp;
263 uint32_t flags;
264 int i;
265
266 d = dsp_get_info(dev);
267
268 KASSERT(PCM_REGISTERED(d) && dev != NULL && dev->si_drv1 != NULL &&
269 PCM_RDCH(dev) == NULL && PCM_WRCH(dev) == NULL &&
270 PCM_VOLCH(dev) == NULL,
271 ("bogus %s(), what are you trying to accomplish here?", __func__));
272 PCM_BUSYASSERT(d);
273 PCM_LOCKASSERT(d);
274
275 cdi = dev->si_drv1;
276 dev->si_drv1 = NULL;
277 cdi->rdch = NULL;
278 cdi->wrch = NULL;
279 cdi->volch = NULL;
280 cdi->simplex = 0;
281 cdi->busy = 0;
282
283 /*
284 * Once it is free, move it back to the beginning of list for
285 * faster new entry allocation.
286 */
287 TAILQ_REMOVE(&d->dsp_cdevinfo_pool, cdi, link);
288 TAILQ_INSERT_HEAD(&d->dsp_cdevinfo_pool, cdi, link);
289
290 /*
291 * Scan the list, cache free entries up to DSP_CDEVINFO_CACHESIZE.
292 * Reset simplex flags.
293 */
294 flags = dsp_get_flags(dev) & ~SD_F_PRIO_SET;
295 i = DSP_CDEVINFO_CACHESIZE;
296 TAILQ_FOREACH_SAFE(cdi, &d->dsp_cdevinfo_pool, link, tmp) {
297 if (cdi->busy != 0) {
298 if (cdi->simplex == 0) {
299 if (cdi->rdch != NULL)
300 flags |= SD_F_PRIO_RD;
301 if (cdi->wrch != NULL)
302 flags |= SD_F_PRIO_WR;
303 }
304 } else {
305 if (i == 0) {
306 TAILQ_REMOVE(&d->dsp_cdevinfo_pool, cdi, link);
307 free(cdi, M_DEVBUF);
308 } else
309 i--;
310 }
311 }
312 dsp_set_flags(dev, flags);
313}
314
315void
316dsp_cdevinfo_init(struct snddev_info *d)
317{
318 struct dsp_cdevinfo *cdi;
319 int i;
320
321 KASSERT(d != NULL, ("NULL snddev_info"));
322 PCM_BUSYASSERT(d);
323 PCM_UNLOCKASSERT(d);
324
325 TAILQ_INIT(&d->dsp_cdevinfo_pool);
326 for (i = 0; i < DSP_CDEVINFO_CACHESIZE; i++) {
327 cdi = malloc(sizeof(*cdi), M_DEVBUF, M_WAITOK | M_ZERO);
328 TAILQ_INSERT_HEAD(&d->dsp_cdevinfo_pool, cdi, link);
329 }
330}
331
332void
333dsp_cdevinfo_flush(struct snddev_info *d)
334{
335 struct dsp_cdevinfo *cdi, *tmp;
336
337 KASSERT(d != NULL, ("NULL snddev_info"));
338 PCM_BUSYASSERT(d);
339 PCM_UNLOCKASSERT(d);
340
341 cdi = TAILQ_FIRST(&d->dsp_cdevinfo_pool);
342 while (cdi != NULL) {
343 tmp = TAILQ_NEXT(cdi, link);
344 free(cdi, M_DEVBUF);
345 cdi = tmp;
346 }
347 TAILQ_INIT(&d->dsp_cdevinfo_pool);
348}
349
350/* duplex / simplex cdev type */
351enum {
352 DSP_CDEV_TYPE_RDONLY, /* simplex read-only (record) */
353 DSP_CDEV_TYPE_WRONLY, /* simplex write-only (play) */
354 DSP_CDEV_TYPE_RDWR /* duplex read, write, or both */
355};
356
357enum {
358 DSP_CDEV_VOLCTL_NONE,
359 DSP_CDEV_VOLCTL_READ,
360 DSP_CDEV_VOLCTL_WRITE
361};
362
363#define DSP_F_VALID(x) ((x) & (FREAD | FWRITE))
364#define DSP_F_DUPLEX(x) (((x) & (FREAD | FWRITE)) == (FREAD | FWRITE))
365#define DSP_F_SIMPLEX(x) (!DSP_F_DUPLEX(x))
366#define DSP_F_READ(x) ((x) & FREAD)
367#define DSP_F_WRITE(x) ((x) & FWRITE)
368
369static const struct {
370 int type;
371 char *name;
372 char *sep;
373 char *alias;
374 int use_sep;
375 int hw;
376 int max;
377 int volctl;
378 uint32_t fmt, spd;
379 int query;
380} dsp_cdevs[] = {
381 { SND_DEV_DSP, "dsp", ".", NULL, 0, 0, 0, 0,
382 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
383 DSP_CDEV_TYPE_RDWR },
384 { SND_DEV_AUDIO, "audio", ".", NULL, 0, 0, 0, 0,
385 SND_FORMAT(AFMT_MU_LAW, 1, 0), DSP_DEFAULT_SPEED,
386 DSP_CDEV_TYPE_RDWR },
387 { SND_DEV_DSP16, "dspW", ".", NULL, 0, 0, 0, 0,
388 SND_FORMAT(AFMT_S16_LE, 1, 0), DSP_DEFAULT_SPEED,
389 DSP_CDEV_TYPE_RDWR },
390 { SND_DEV_DSPHW_PLAY, "dsp", ".p", NULL, 1, 1, SND_MAXHWCHAN, 1,
391 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_WRONLY },
392 { SND_DEV_DSPHW_VPLAY, "dsp", ".vp", NULL, 1, 1, SND_MAXVCHANS, 1,
393 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_WRONLY },
394 { SND_DEV_DSPHW_REC, "dsp", ".r", NULL, 1, 1, SND_MAXHWCHAN, 1,
395 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_RDONLY },
396 { SND_DEV_DSPHW_VREC, "dsp", ".vr", NULL, 1, 1, SND_MAXVCHANS, 1,
397 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_RDONLY },
398 { SND_DEV_DSPHW_CD, "dspcd", ".", NULL, 0, 0, 0, 0,
399 SND_FORMAT(AFMT_S16_LE, 2, 0), 44100, DSP_CDEV_TYPE_RDWR },
400 /* Low priority, OSSv4 aliases. */
401 { SND_DEV_DSP, "dsp_ac3", ".", "dsp", 0, 0, 0, 0,
402 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
403 DSP_CDEV_TYPE_RDWR },
404 { SND_DEV_DSP, "dsp_mmap", ".", "dsp", 0, 0, 0, 0,
405 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
406 DSP_CDEV_TYPE_RDWR },
407 { SND_DEV_DSP, "dsp_multich", ".", "dsp", 0, 0, 0, 0,
408 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
409 DSP_CDEV_TYPE_RDWR },
410 { SND_DEV_DSP, "dsp_spdifout", ".", "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_spdifin", ".", "dsp", 0, 0, 0, 0,
414 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
415 DSP_CDEV_TYPE_RDWR },
416};
417
418#define DSP_FIXUP_ERROR() do { \
419 prio = dsp_get_flags(i_dev); \
420 if (!DSP_F_VALID(flags)) \
421 error = EINVAL; \
422 if (!DSP_F_DUPLEX(flags) && \
423 ((DSP_F_READ(flags) && d->reccount == 0) || \
424 (DSP_F_WRITE(flags) && d->playcount == 0))) \
425 error = ENOTSUP; \
426 else if (!DSP_F_DUPLEX(flags) && (prio & SD_F_SIMPLEX) && \
427 ((DSP_F_READ(flags) && (prio & SD_F_PRIO_WR)) || \
428 (DSP_F_WRITE(flags) && (prio & SD_F_PRIO_RD)))) \
429 error = EBUSY; \
430 else if (DSP_REGISTERED(d, i_dev)) \
431 error = EBUSY; \
432} while (0)
433
434static int
435dsp_open(struct cdev *i_dev, int flags, int mode, struct thread *td)
436{
437 struct pcm_channel *rdch, *wrch;
438 struct snddev_info *d;
439 uint32_t fmt, spd, prio, volctl;
440 int i, error, rderror, wrerror, devtype, wdevunit, rdevunit;
441
442 /* Kind of impossible.. */
443 if (i_dev == NULL || td == NULL)
444 return (ENODEV);
445
446 d = dsp_get_info(i_dev);
447 if (!PCM_REGISTERED(d))
448 return (EBADF);
449
450 PCM_GIANT_ENTER(d);
451
452 /* Lock snddev so nobody else can monkey with it. */
453 PCM_LOCK(d);
454 PCM_WAIT(d);
455
456 /*
457 * Try to acquire cloned device before someone else pick it.
458 * ENODEV means this is not a cloned droids.
459 */
460 error = snd_clone_acquire(i_dev);
461 if (!(error == 0 || error == ENODEV)) {
462 DSP_FIXUP_ERROR();
463 PCM_UNLOCK(d);
464 PCM_GIANT_EXIT(d);
465 return (error);
466 }
467
468 error = 0;
469 DSP_FIXUP_ERROR();
470
471 if (error != 0) {
472 (void)snd_clone_release(i_dev);
473 PCM_UNLOCK(d);
474 PCM_GIANT_EXIT(d);
475 return (error);
476 }
477
478 /*
479 * That is just enough. Acquire and unlock pcm lock so
480 * the other will just have to wait until we finish doing
481 * everything.
482 */
483 PCM_ACQUIRE(d);
484 PCM_UNLOCK(d);
485
486 devtype = PCMDEV(i_dev);
487 wdevunit = -1;
488 rdevunit = -1;
489 fmt = 0;
490 spd = 0;
491 volctl = DSP_CDEV_VOLCTL_NONE;
492
493 for (i = 0; i < (sizeof(dsp_cdevs) / sizeof(dsp_cdevs[0])); i++) {
494 if (devtype != dsp_cdevs[i].type || dsp_cdevs[i].alias != NULL)
495 continue;
496 /*
497 * Volume control only valid for DSPHW devices,
498 * and it must be opened in opposite direction be it
499 * simplex or duplex. Anything else will be handled
500 * as usual.
501 */
502 if (dsp_cdevs[i].query == DSP_CDEV_TYPE_WRONLY) {
503 if (dsp_cdevs[i].volctl != 0 &&
504 DSP_F_READ(flags)) {
505 volctl = DSP_CDEV_VOLCTL_WRITE;
506 flags &= ~FREAD;
507 flags |= FWRITE;
508 }
509 if (DSP_F_READ(flags)) {
510 (void)snd_clone_release(i_dev);
511 PCM_RELEASE_QUICK(d);
512 PCM_GIANT_EXIT(d);
513 return (ENOTSUP);
514 }
515 wdevunit = dev2unit(i_dev);
516 } else if (dsp_cdevs[i].query == DSP_CDEV_TYPE_RDONLY) {
517 if (dsp_cdevs[i].volctl != 0 &&
518 DSP_F_WRITE(flags)) {
519 volctl = DSP_CDEV_VOLCTL_READ;
520 flags &= ~FWRITE;
521 flags |= FREAD;
522 }
523 if (DSP_F_WRITE(flags)) {
524 (void)snd_clone_release(i_dev);
525 PCM_RELEASE_QUICK(d);
526 PCM_GIANT_EXIT(d);
527 return (ENOTSUP);
528 }
529 rdevunit = dev2unit(i_dev);
530 }
531 fmt = dsp_cdevs[i].fmt;
532 spd = dsp_cdevs[i].spd;
533 break;
534 }
535
536 /* No matching devtype? */
537 if (fmt == 0 || spd == 0)
538 panic("impossible devtype %d", devtype);
539
540 rdch = NULL;
541 wrch = NULL;
542 rderror = 0;
543 wrerror = 0;
544
545 /*
546 * if we get here, the open request is valid- either:
547 * * we were previously not open
548 * * we were open for play xor record and the opener wants
549 * the non-open direction
550 */
551 if (DSP_F_READ(flags)) {
552 /* open for read */
553 rderror = pcm_chnalloc(d, &rdch, PCMDIR_REC,
554 td->td_proc->p_pid, td->td_proc->p_comm, rdevunit);
555
556 if (rderror == 0 && chn_reset(rdch, fmt, spd) != 0)
557 rderror = ENXIO;
558
559 if (volctl == DSP_CDEV_VOLCTL_READ)
560 rderror = 0;
561
562 if (rderror != 0) {
563 if (rdch != NULL)
564 pcm_chnrelease(rdch);
565 if (!DSP_F_DUPLEX(flags)) {
566 (void)snd_clone_release(i_dev);
567 PCM_RELEASE_QUICK(d);
568 PCM_GIANT_EXIT(d);
569 return (rderror);
570 }
571 rdch = NULL;
572 } else if (volctl == DSP_CDEV_VOLCTL_READ) {
573 if (rdch != NULL) {
574 pcm_chnref(rdch, 1);
575 pcm_chnrelease(rdch);
576 }
577 } else {
578 if (flags & O_NONBLOCK)
579 rdch->flags |= CHN_F_NBIO;
580 if (flags & O_EXCL)
581 rdch->flags |= CHN_F_EXCLUSIVE;
582 pcm_chnref(rdch, 1);
583 if (volctl == DSP_CDEV_VOLCTL_NONE)
584 chn_vpc_reset(rdch, SND_VOL_C_PCM, 0);
585 CHN_UNLOCK(rdch);
586 }
587 }
588
589 if (DSP_F_WRITE(flags)) {
590 /* open for write */
591 wrerror = pcm_chnalloc(d, &wrch, PCMDIR_PLAY,
592 td->td_proc->p_pid, td->td_proc->p_comm, wdevunit);
593
594 if (wrerror == 0 && chn_reset(wrch, fmt, spd) != 0)
595 wrerror = ENXIO;
596
597 if (volctl == DSP_CDEV_VOLCTL_WRITE)
598 wrerror = 0;
599
600 if (wrerror != 0) {
601 if (wrch != NULL)
602 pcm_chnrelease(wrch);
603 if (!DSP_F_DUPLEX(flags)) {
604 if (rdch != NULL) {
605 /*
606 * Lock, deref and release previously
607 * created record channel
608 */
609 CHN_LOCK(rdch);
610 pcm_chnref(rdch, -1);
611 pcm_chnrelease(rdch);
612 }
613 (void)snd_clone_release(i_dev);
614 PCM_RELEASE_QUICK(d);
615 PCM_GIANT_EXIT(d);
616 return (wrerror);
617 }
618 wrch = NULL;
619 } else if (volctl == DSP_CDEV_VOLCTL_WRITE) {
620 if (wrch != NULL) {
621 pcm_chnref(wrch, 1);
622 pcm_chnrelease(wrch);
623 }
624 } else {
625 if (flags & O_NONBLOCK)
626 wrch->flags |= CHN_F_NBIO;
627 if (flags & O_EXCL)
628 wrch->flags |= CHN_F_EXCLUSIVE;
629 pcm_chnref(wrch, 1);
630 if (volctl == DSP_CDEV_VOLCTL_NONE)
631 chn_vpc_reset(wrch, SND_VOL_C_PCM, 0);
632 CHN_UNLOCK(wrch);
633 }
634 }
635
636
637 PCM_LOCK(d);
638
639 /*
640 * We're done. Allocate channels information for this cdev.
641 */
642 switch (volctl) {
643 case DSP_CDEV_VOLCTL_READ:
644 KASSERT(wrch == NULL, ("wrch=%p not null!", wrch));
645 dsp_cdevinfo_alloc(i_dev, NULL, NULL, rdch);
646 break;
647 case DSP_CDEV_VOLCTL_WRITE:
648 KASSERT(rdch == NULL, ("rdch=%p not null!", rdch));
649 dsp_cdevinfo_alloc(i_dev, NULL, NULL, wrch);
650 break;
651 case DSP_CDEV_VOLCTL_NONE:
652 default:
653 if (wrch == NULL && rdch == NULL) {
654 (void)snd_clone_release(i_dev);
655 PCM_RELEASE(d);
656 PCM_UNLOCK(d);
657 PCM_GIANT_EXIT(d);
658 if (wrerror != 0)
659 return (wrerror);
660 if (rderror != 0)
661 return (rderror);
662 return (EINVAL);
663 }
664 dsp_cdevinfo_alloc(i_dev, rdch, wrch, NULL);
665 if (rdch != NULL)
666 CHN_INSERT_HEAD(d, rdch, channels.pcm.opened);
667 if (wrch != NULL)
668 CHN_INSERT_HEAD(d, wrch, channels.pcm.opened);
669 break;
670 }
671
672 /*
673 * Increase clone refcount for its automatic garbage collector.
674 */
675 (void)snd_clone_ref(i_dev);
676
677 PCM_RELEASE(d);
678 PCM_UNLOCK(d);
679
680 PCM_GIANT_LEAVE(d);
681
682 return (0);
683}
684
685static int
686dsp_close(struct cdev *i_dev, int flags, int mode, struct thread *td)
687{
688 struct pcm_channel *rdch, *wrch, *volch;
689 struct snddev_info *d;
690 int sg_ids, rdref, wdref;
691
692 d = dsp_get_info(i_dev);
693 if (!DSP_REGISTERED(d, i_dev))
694 return (EBADF);
695
696 PCM_GIANT_ENTER(d);
697
698 PCM_LOCK(d);
699 PCM_WAIT(d);
700 PCM_ACQUIRE(d);
701
702 rdch = PCM_RDCH(i_dev);
703 wrch = PCM_WRCH(i_dev);
704 volch = PCM_VOLCH(i_dev);
705
706 PCM_RDCH(i_dev) = NULL;
707 PCM_WRCH(i_dev) = NULL;
708 PCM_VOLCH(i_dev) = NULL;
709
710 rdref = -1;
711 wdref = -1;
712
713 if (volch != NULL) {
714 if (volch == rdch)
715 rdref--;
716 else if (volch == wrch)
717 wdref--;
718 else {
719 CHN_LOCK(volch);
720 pcm_chnref(volch, -1);
721 CHN_UNLOCK(volch);
722 }
723 }
724
725 if (rdch != NULL)
726 CHN_REMOVE(d, rdch, channels.pcm.opened);
727 if (wrch != NULL)
728 CHN_REMOVE(d, wrch, channels.pcm.opened);
729
730 if (rdch != NULL || wrch != NULL) {
731 PCM_UNLOCK(d);
732 if (rdch != NULL) {
733 /*
734 * The channel itself need not be locked because:
735 * a) Adding a channel to a syncgroup happens only
736 * in dsp_ioctl(), which cannot run concurrently
737 * to dsp_close().
738 * b) The syncmember pointer (sm) is protected by
739 * the global syncgroup list lock.
740 * c) A channel can't just disappear, invalidating
741 * pointers, unless it's closed/dereferenced
742 * first.
743 */
744 PCM_SG_LOCK();
745 sg_ids = chn_syncdestroy(rdch);
746 PCM_SG_UNLOCK();
747 if (sg_ids != 0)
748 free_unr(pcmsg_unrhdr, sg_ids);
749
750 CHN_LOCK(rdch);
751 pcm_chnref(rdch, rdref);
752 chn_abort(rdch); /* won't sleep */
753 rdch->flags &= ~(CHN_F_RUNNING | CHN_F_MMAP |
754 CHN_F_DEAD | CHN_F_EXCLUSIVE);
755 chn_reset(rdch, 0, 0);
756 pcm_chnrelease(rdch);
757 }
758 if (wrch != NULL) {
759 /*
760 * Please see block above.
761 */
762 PCM_SG_LOCK();
763 sg_ids = chn_syncdestroy(wrch);
764 PCM_SG_UNLOCK();
765 if (sg_ids != 0)
766 free_unr(pcmsg_unrhdr, sg_ids);
767
768 CHN_LOCK(wrch);
769 pcm_chnref(wrch, wdref);
770 chn_flush(wrch); /* may sleep */
771 wrch->flags &= ~(CHN_F_RUNNING | CHN_F_MMAP |
772 CHN_F_DEAD | CHN_F_EXCLUSIVE);
773 chn_reset(wrch, 0, 0);
774 pcm_chnrelease(wrch);
775 }
776 PCM_LOCK(d);
777 }
778
779 dsp_cdevinfo_free(i_dev);
780 /*
781 * Release clone busy state and unref it so the automatic
782 * garbage collector will get the hint and do the remaining
783 * cleanup process.
784 */
785 (void)snd_clone_release(i_dev);
786
787 /*
788 * destroy_dev() might sleep, so release pcm lock
789 * here and rely on pcm cv serialization.
790 */
791 PCM_UNLOCK(d);
792 (void)snd_clone_unref(i_dev);
793 PCM_LOCK(d);
794
795 PCM_RELEASE(d);
796 PCM_UNLOCK(d);
797
798 PCM_GIANT_LEAVE(d);
799
800 return (0);
801}
802
803static __inline int
804dsp_io_ops(struct cdev *i_dev, struct uio *buf)
805{
806 struct snddev_info *d;
807 struct pcm_channel **ch, *rdch, *wrch;
808 int (*chn_io)(struct pcm_channel *, struct uio *);
809 int prio, ret;
810 pid_t runpid;
811
812 KASSERT(i_dev != NULL && buf != NULL &&
813 (buf->uio_rw == UIO_READ || buf->uio_rw == UIO_WRITE),
814 ("%s(): io train wreck!", __func__));
815
816 d = dsp_get_info(i_dev);
817 if (!DSP_REGISTERED(d, i_dev))
818 return (EBADF);
819
820 PCM_GIANT_ENTER(d);
821
822 switch (buf->uio_rw) {
823 case UIO_READ:
824 prio = SD_F_PRIO_RD;
825 ch = &rdch;
826 chn_io = chn_read;
827 break;
828 case UIO_WRITE:
829 prio = SD_F_PRIO_WR;
830 ch = &wrch;
831 chn_io = chn_write;
832 break;
833 default:
834 panic("invalid/corrupted uio direction: %d", buf->uio_rw);
835 break;
836 }
837
838 rdch = NULL;
839 wrch = NULL;
840 runpid = buf->uio_td->td_proc->p_pid;
841
842 getchns(i_dev, &rdch, &wrch, prio);
843
844 if (*ch == NULL || !((*ch)->flags & CHN_F_BUSY)) {
845 PCM_GIANT_EXIT(d);
846 return (EBADF);
847 }
848
849 if (((*ch)->flags & (CHN_F_MMAP | CHN_F_DEAD)) ||
850 (((*ch)->flags & CHN_F_RUNNING) && (*ch)->pid != runpid)) {
851 relchns(i_dev, rdch, wrch, prio);
852 PCM_GIANT_EXIT(d);
853 return (EINVAL);
854 } else if (!((*ch)->flags & CHN_F_RUNNING)) {
855 (*ch)->flags |= CHN_F_RUNNING;
856 (*ch)->pid = runpid;
857 }
858
859 /*
860 * chn_read/write must give up channel lock in order to copy bytes
861 * from/to userland, so up the "in progress" counter to make sure
862 * someone else doesn't come along and muss up the buffer.
863 */
864 ++(*ch)->inprog;
865 ret = chn_io(*ch, buf);
866 --(*ch)->inprog;
867
868 CHN_BROADCAST(&(*ch)->cv);
869
870 relchns(i_dev, rdch, wrch, prio);
871
872 PCM_GIANT_LEAVE(d);
873
874 return (ret);
875}
876
877static int
878dsp_read(struct cdev *i_dev, struct uio *buf, int flag)
879{
880 return (dsp_io_ops(i_dev, buf));
881}
882
883static int
884dsp_write(struct cdev *i_dev, struct uio *buf, int flag)
885{
886 return (dsp_io_ops(i_dev, buf));
887}
888
889static int
890dsp_get_volume_channel(struct cdev *dev, struct pcm_channel **volch)
891{
892 struct snddev_info *d;
893 struct pcm_channel *c;
894 int unit;
895
896 KASSERT(dev != NULL && volch != NULL,
897 ("%s(): NULL query dev=%p volch=%p", __func__, dev, volch));
898
899 d = dsp_get_info(dev);
900 if (!PCM_REGISTERED(d)) {
901 *volch = NULL;
902 return (EINVAL);
903 }
904
905 PCM_UNLOCKASSERT(d);
906
907 *volch = NULL;
908
909 c = PCM_VOLCH(dev);
910 if (c != NULL) {
911 if (!(c->feederflags & (1 << FEEDER_VOLUME)))
912 return (-1);
913 *volch = c;
914 return (0);
915 }
916
917 PCM_LOCK(d);
918 PCM_WAIT(d);
919 PCM_ACQUIRE(d);
920
921 unit = dev2unit(dev);
922
923 CHN_FOREACH(c, d, channels.pcm) {
924 CHN_LOCK(c);
925 if (c->unit != unit) {
926 CHN_UNLOCK(c);
927 continue;
928 }
929 *volch = c;
930 pcm_chnref(c, 1);
931 PCM_VOLCH(dev) = c;
932 CHN_UNLOCK(c);
933 PCM_RELEASE(d);
934 PCM_UNLOCK(d);
935 return ((c->feederflags & (1 << FEEDER_VOLUME)) ? 0 : -1);
936 }
937
938 PCM_RELEASE(d);
939 PCM_UNLOCK(d);
940
941 return (EINVAL);
942}
943
944static int
945dsp_ioctl_channel(struct cdev *dev, struct pcm_channel *volch, u_long cmd,
946 caddr_t arg)
947{
948 struct snddev_info *d;
949 struct pcm_channel *rdch, *wrch;
950 int j, devtype, ret;
951
952 d = dsp_get_info(dev);
953 if (!PCM_REGISTERED(d) || !(dsp_get_flags(dev) & SD_F_VPC))
954 return (-1);
955
956 PCM_UNLOCKASSERT(d);
957
958 j = cmd & 0xff;
959
960 rdch = PCM_RDCH(dev);
961 wrch = PCM_WRCH(dev);
962
963 /* No specific channel, look into cache */
964 if (volch == NULL)
965 volch = PCM_VOLCH(dev);
966
967 /* Look harder */
968 if (volch == NULL) {
969 if (j == SOUND_MIXER_RECLEV && rdch != NULL)
970 volch = rdch;
971 else if (j == SOUND_MIXER_PCM && wrch != NULL)
972 volch = wrch;
973 }
974
975 devtype = PCMDEV(dev);
976
977 /* Look super harder */
978 if (volch == NULL &&
979 (devtype == SND_DEV_DSPHW_PLAY || devtype == SND_DEV_DSPHW_VPLAY ||
980 devtype == SND_DEV_DSPHW_REC || devtype == SND_DEV_DSPHW_VREC)) {
981 ret = dsp_get_volume_channel(dev, &volch);
982 if (ret != 0)
983 return (ret);
984 if (volch == NULL)
985 return (EINVAL);
986 }
987
988 /* Final validation */
989 if (volch != NULL) {
990 CHN_LOCK(volch);
991 if (!(volch->feederflags & (1 << FEEDER_VOLUME))) {
992 CHN_UNLOCK(volch);
993 return (-1);
994 }
995 if (volch->direction == PCMDIR_PLAY)
996 wrch = volch;
997 else
998 rdch = volch;
999 }
1000
1001 ret = EINVAL;
1002
1003 if (volch != NULL &&
1004 ((j == SOUND_MIXER_PCM && volch->direction == PCMDIR_PLAY) ||
1005 (j == SOUND_MIXER_RECLEV && volch->direction == PCMDIR_REC))) {
1006 if ((cmd & MIXER_WRITE(0)) == MIXER_WRITE(0)) {
1007 int left, right, center;
1008
1009 left = *(int *)arg & 0x7f;
1010 right = ((*(int *)arg) >> 8) & 0x7f;
1011 center = (left + right) >> 1;
1012 chn_setvolume_multi(volch, SND_VOL_C_PCM, left, right,
1013 center);
1014 } else if ((cmd & MIXER_READ(0)) == MIXER_READ(0)) {
1015 *(int *)arg = CHN_GETVOLUME(volch,
1016 SND_VOL_C_PCM, SND_CHN_T_FL);
1017 *(int *)arg |= CHN_GETVOLUME(volch,
1018 SND_VOL_C_PCM, SND_CHN_T_FR) << 8;
1019 }
1020 ret = 0;
1021 } else if (rdch != NULL || wrch != NULL) {
1022 switch (j) {
1023 case SOUND_MIXER_DEVMASK:
1024 case SOUND_MIXER_CAPS:
1025 case SOUND_MIXER_STEREODEVS:
1026 if ((cmd & MIXER_READ(0)) == MIXER_READ(0)) {
1027 *(int *)arg = 0;
1028 if (rdch != NULL)
1029 *(int *)arg |= SOUND_MASK_RECLEV;
1030 if (wrch != NULL)
1031 *(int *)arg |= SOUND_MASK_PCM;
1032 }
1033 ret = 0;
1034 break;
1035 case SOUND_MIXER_RECMASK:
1036 case SOUND_MIXER_RECSRC:
1037 if ((cmd & MIXER_READ(0)) == MIXER_READ(0))
1038 *(int *)arg = 0;
1039 ret = 0;
1040 break;
1041 default:
1042 break;
1043 }
1044 }
1045
1046 if (volch != NULL)
1047 CHN_UNLOCK(volch);
1048
1049 return (ret);
1050}
1051
1052static int
1053dsp_ioctl(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode,
1054 struct thread *td)
1055{
1056 struct pcm_channel *chn, *rdch, *wrch;
1057 struct snddev_info *d;
1058 int *arg_i, ret, tmp, xcmd;
1059
1060 d = dsp_get_info(i_dev);
1061 if (!DSP_REGISTERED(d, i_dev))
1062 return (EBADF);
1063
1064 PCM_GIANT_ENTER(d);
1065
1066 arg_i = (int *)arg;
1067 ret = 0;
1068 xcmd = 0;
1069 chn = NULL;
1070
1071 if (IOCGROUP(cmd) == 'M') {
1072 ret = dsp_ioctl_channel(i_dev, PCM_VOLCH(i_dev), cmd, arg);
1073 if (ret != -1) {
1074 PCM_GIANT_EXIT(d);
1075 return (ret);
1076 }
1077
1078 if (d->mixer_dev != NULL) {
1079 PCM_ACQUIRE_QUICK(d);
1080 ret = mixer_ioctl_cmd(d->mixer_dev, cmd, arg, -1, td,
1081 MIXER_CMD_DIRECT);
1082 PCM_RELEASE_QUICK(d);
1083 } else
1084 ret = EBADF;
1085
1086 PCM_GIANT_EXIT(d);
1087
1088 return (ret);
1089 }
1090
1091 /*
1092 * Certain ioctls may be made on any type of device (audio, mixer,
1093 * and MIDI). Handle those special cases here.
1094 */
1095 if (IOCGROUP(cmd) == 'X') {
1096 PCM_ACQUIRE_QUICK(d);
1097 switch(cmd) {
1098 case SNDCTL_SYSINFO:
1099 sound_oss_sysinfo((oss_sysinfo *)arg);
1100 break;
1101 case SNDCTL_CARDINFO:
1102 ret = sound_oss_card_info((oss_card_info *)arg);
1103 break;
1104 case SNDCTL_AUDIOINFO:
1105 case SNDCTL_AUDIOINFO_EX:
1106 case SNDCTL_ENGINEINFO:
1107 ret = dsp_oss_audioinfo(i_dev, (oss_audioinfo *)arg);
1108 break;
1109 case SNDCTL_MIXERINFO:
1110 ret = mixer_oss_mixerinfo(i_dev, (oss_mixerinfo *)arg);
1111 break;
1112 default:
1113 ret = EINVAL;
1114 }
1115 PCM_RELEASE_QUICK(d);
1116 PCM_GIANT_EXIT(d);
1117 return (ret);
1118 }
1119
1120 getchns(i_dev, &rdch, &wrch, 0);
1121
1122 if (wrch != NULL && (wrch->flags & CHN_F_DEAD))
1123 wrch = NULL;
1124 if (rdch != NULL && (rdch->flags & CHN_F_DEAD))
1125 rdch = NULL;
1126
1127 if (wrch == NULL && rdch == NULL) {
1128 PCM_GIANT_EXIT(d);
1129 return (EINVAL);
1130 }
1131
1132 switch(cmd) {
1133#ifdef OLDPCM_IOCTL
1134 /*
1135 * we start with the new ioctl interface.
1136 */
1137 case AIONWRITE: /* how many bytes can write ? */
1138 if (wrch) {
1139 CHN_LOCK(wrch);
1140/*
1141 if (wrch && wrch->bufhard.dl)
1142 while (chn_wrfeed(wrch) == 0);
1143*/
1144 *arg_i = sndbuf_getfree(wrch->bufsoft);
1145 CHN_UNLOCK(wrch);
1146 } else {
1147 *arg_i = 0;
1148 ret = EINVAL;
1149 }
1150 break;
1151
1152 case AIOSSIZE: /* set the current blocksize */
1153 {
1154 struct snd_size *p = (struct snd_size *)arg;
1155
1156 p->play_size = 0;
1157 p->rec_size = 0;
1158 PCM_ACQUIRE_QUICK(d);
1159 if (wrch) {
1160 CHN_LOCK(wrch);
1161 chn_setblocksize(wrch, 2, p->play_size);
1162 p->play_size = sndbuf_getblksz(wrch->bufsoft);
1163 CHN_UNLOCK(wrch);
1164 }
1165 if (rdch) {
1166 CHN_LOCK(rdch);
1167 chn_setblocksize(rdch, 2, p->rec_size);
1168 p->rec_size = sndbuf_getblksz(rdch->bufsoft);
1169 CHN_UNLOCK(rdch);
1170 }
1171 PCM_RELEASE_QUICK(d);
1172 }
1173 break;
1174 case AIOGSIZE: /* get the current blocksize */
1175 {
1176 struct snd_size *p = (struct snd_size *)arg;
1177
1178 if (wrch) {
1179 CHN_LOCK(wrch);
1180 p->play_size = sndbuf_getblksz(wrch->bufsoft);
1181 CHN_UNLOCK(wrch);
1182 }
1183 if (rdch) {
1184 CHN_LOCK(rdch);
1185 p->rec_size = sndbuf_getblksz(rdch->bufsoft);
1186 CHN_UNLOCK(rdch);
1187 }
1188 }
1189 break;
1190
1191 case AIOSFMT:
1192 case AIOGFMT:
1193 {
1194 snd_chan_param *p = (snd_chan_param *)arg;
1195
1196 if (cmd == AIOSFMT &&
1197 ((p->play_format != 0 && p->play_rate == 0) ||
1198 (p->rec_format != 0 && p->rec_rate == 0))) {
1199 ret = EINVAL;
1200 break;
1201 }
1202 PCM_ACQUIRE_QUICK(d);
1203 if (wrch) {
1204 CHN_LOCK(wrch);
1205 if (cmd == AIOSFMT && p->play_format != 0) {
1206 chn_setformat(wrch,
1207 SND_FORMAT(p->play_format,
1208 AFMT_CHANNEL(wrch->format),
1209 AFMT_EXTCHANNEL(wrch->format)));
1210 chn_setspeed(wrch, p->play_rate);
1211 }
1212 p->play_rate = wrch->speed;
1213 p->play_format = AFMT_ENCODING(wrch->format);
1214 CHN_UNLOCK(wrch);
1215 } else {
1216 p->play_rate = 0;
1217 p->play_format = 0;
1218 }
1219 if (rdch) {
1220 CHN_LOCK(rdch);
1221 if (cmd == AIOSFMT && p->rec_format != 0) {
1222 chn_setformat(rdch,
1223 SND_FORMAT(p->rec_format,
1224 AFMT_CHANNEL(rdch->format),
1225 AFMT_EXTCHANNEL(rdch->format)));
1226 chn_setspeed(rdch, p->rec_rate);
1227 }
1228 p->rec_rate = rdch->speed;
1229 p->rec_format = AFMT_ENCODING(rdch->format);
1230 CHN_UNLOCK(rdch);
1231 } else {
1232 p->rec_rate = 0;
1233 p->rec_format = 0;
1234 }
1235 PCM_RELEASE_QUICK(d);
1236 }
1237 break;
1238
1239 case AIOGCAP: /* get capabilities */
1240 {
1241 snd_capabilities *p = (snd_capabilities *)arg;
1242 struct pcmchan_caps *pcaps = NULL, *rcaps = NULL;
1243 struct cdev *pdev;
1244
1245 PCM_LOCK(d);
1246 if (rdch) {
1247 CHN_LOCK(rdch);
1248 rcaps = chn_getcaps(rdch);
1249 }
1250 if (wrch) {
1251 CHN_LOCK(wrch);
1252 pcaps = chn_getcaps(wrch);
1253 }
1254 p->rate_min = max(rcaps? rcaps->minspeed : 0,
1255 pcaps? pcaps->minspeed : 0);
1256 p->rate_max = min(rcaps? rcaps->maxspeed : 1000000,
1257 pcaps? pcaps->maxspeed : 1000000);
1258 p->bufsize = min(rdch? sndbuf_getsize(rdch->bufsoft) : 1000000,
1259 wrch? sndbuf_getsize(wrch->bufsoft) : 1000000);
1260 /* XXX bad on sb16 */
1261 p->formats = (rdch? chn_getformats(rdch) : 0xffffffff) &
1262 (wrch? chn_getformats(wrch) : 0xffffffff);
1263 if (rdch && wrch)
1264 p->formats |= (dsp_get_flags(i_dev) & SD_F_SIMPLEX)? 0 : AFMT_FULLDUPLEX;
1265 pdev = d->mixer_dev;
1266 p->mixers = 1; /* default: one mixer */
1267 p->inputs = pdev->si_drv1? mix_getdevs(pdev->si_drv1) : 0;
1268 p->left = p->right = 100;
1269 if (wrch)
1270 CHN_UNLOCK(wrch);
1271 if (rdch)
1272 CHN_UNLOCK(rdch);
1273 PCM_UNLOCK(d);
1274 }
1275 break;
1276
1277 case AIOSTOP:
1278 if (*arg_i == AIOSYNC_PLAY && wrch) {
1279 CHN_LOCK(wrch);
1280 *arg_i = chn_abort(wrch);
1281 CHN_UNLOCK(wrch);
1282 } else if (*arg_i == AIOSYNC_CAPTURE && rdch) {
1283 CHN_LOCK(rdch);
1284 *arg_i = chn_abort(rdch);
1285 CHN_UNLOCK(rdch);
1286 } else {
1287 printf("AIOSTOP: bad channel 0x%x\n", *arg_i);
1288 *arg_i = 0;
1289 }
1290 break;
1291
1292 case AIOSYNC:
1293 printf("AIOSYNC chan 0x%03lx pos %lu unimplemented\n",
1294 ((snd_sync_parm *)arg)->chan, ((snd_sync_parm *)arg)->pos);
1295 break;
1296#endif
1297 /*
1298 * here follow the standard ioctls (filio.h etc.)
1299 */
1300 case FIONREAD: /* get # bytes to read */
1301 if (rdch) {
1302 CHN_LOCK(rdch);
1303/* if (rdch && rdch->bufhard.dl)
1304 while (chn_rdfeed(rdch) == 0);
1305*/
1306 *arg_i = sndbuf_getready(rdch->bufsoft);
1307 CHN_UNLOCK(rdch);
1308 } else {
1309 *arg_i = 0;
1310 ret = EINVAL;
1311 }
1312 break;
1313
1314 case FIOASYNC: /*set/clear async i/o */
1315 DEB( printf("FIOASYNC\n") ; )
1316 break;
1317
1318 case SNDCTL_DSP_NONBLOCK: /* set non-blocking i/o */
1319 case FIONBIO: /* set/clear non-blocking i/o */
1320 if (rdch) {
1321 CHN_LOCK(rdch);
1322 if (cmd == SNDCTL_DSP_NONBLOCK || *arg_i)
1323 rdch->flags |= CHN_F_NBIO;
1324 else
1325 rdch->flags &= ~CHN_F_NBIO;
1326 CHN_UNLOCK(rdch);
1327 }
1328 if (wrch) {
1329 CHN_LOCK(wrch);
1330 if (cmd == SNDCTL_DSP_NONBLOCK || *arg_i)
1331 wrch->flags |= CHN_F_NBIO;
1332 else
1333 wrch->flags &= ~CHN_F_NBIO;
1334 CHN_UNLOCK(wrch);
1335 }
1336 break;
1337
1338 /*
1339 * Finally, here is the linux-compatible ioctl interface
1340 */
1341#define THE_REAL_SNDCTL_DSP_GETBLKSIZE _IOWR('P', 4, int)
1342 case THE_REAL_SNDCTL_DSP_GETBLKSIZE:
1343 case SNDCTL_DSP_GETBLKSIZE:
1344 chn = wrch ? wrch : rdch;
1345 if (chn) {
1346 CHN_LOCK(chn);
1347 *arg_i = sndbuf_getblksz(chn->bufsoft);
1348 CHN_UNLOCK(chn);
1349 } else {
1350 *arg_i = 0;
1351 ret = EINVAL;
1352 }
1353 break;
1354
1355 case SNDCTL_DSP_SETBLKSIZE:
1356 RANGE(*arg_i, 16, 65536);
1357 PCM_ACQUIRE_QUICK(d);
1358 if (wrch) {
1359 CHN_LOCK(wrch);
1360 chn_setblocksize(wrch, 2, *arg_i);
1361 CHN_UNLOCK(wrch);
1362 }
1363 if (rdch) {
1364 CHN_LOCK(rdch);
1365 chn_setblocksize(rdch, 2, *arg_i);
1366 CHN_UNLOCK(rdch);
1367 }
1368 PCM_RELEASE_QUICK(d);
1369 break;
1370
1371 case SNDCTL_DSP_RESET:
1372 DEB(printf("dsp reset\n"));
1373 if (wrch) {
1374 CHN_LOCK(wrch);
1375 chn_abort(wrch);
1376 chn_resetbuf(wrch);
1377 CHN_UNLOCK(wrch);
1378 }
1379 if (rdch) {
1380 CHN_LOCK(rdch);
1381 chn_abort(rdch);
1382 chn_resetbuf(rdch);
1383 CHN_UNLOCK(rdch);
1384 }
1385 break;
1386
1387 case SNDCTL_DSP_SYNC:
1388 DEB(printf("dsp sync\n"));
1389 /* chn_sync may sleep */
1390 if (wrch) {
1391 CHN_LOCK(wrch);
1392 chn_sync(wrch, 0);
1393 CHN_UNLOCK(wrch);
1394 }
1395 break;
1396
1397 case SNDCTL_DSP_SPEED:
1398 /* chn_setspeed may sleep */
1399 tmp = 0;
1400 PCM_ACQUIRE_QUICK(d);
1401 if (wrch) {
1402 CHN_LOCK(wrch);
1403 ret = chn_setspeed(wrch, *arg_i);
1404 tmp = wrch->speed;
1405 CHN_UNLOCK(wrch);
1406 }
1407 if (rdch && ret == 0) {
1408 CHN_LOCK(rdch);
1409 ret = chn_setspeed(rdch, *arg_i);
1410 if (tmp == 0)
1411 tmp = rdch->speed;
1412 CHN_UNLOCK(rdch);
1413 }
1414 PCM_RELEASE_QUICK(d);
1415 *arg_i = tmp;
1416 break;
1417
1418 case SOUND_PCM_READ_RATE:
1419 chn = wrch ? wrch : rdch;
1420 if (chn) {
1421 CHN_LOCK(chn);
1422 *arg_i = chn->speed;
1423 CHN_UNLOCK(chn);
1424 } else {
1425 *arg_i = 0;
1426 ret = EINVAL;
1427 }
1428 break;
1429
1430 case SNDCTL_DSP_STEREO:
1431 tmp = -1;
1432 *arg_i = (*arg_i)? 2 : 1;
1433 PCM_ACQUIRE_QUICK(d);
1434 if (wrch) {
1435 CHN_LOCK(wrch);
1436 ret = chn_setformat(wrch,
1437 SND_FORMAT(wrch->format, *arg_i, 0));
1438 tmp = (AFMT_CHANNEL(wrch->format) > 1)? 1 : 0;
1439 CHN_UNLOCK(wrch);
1440 }
1441 if (rdch && ret == 0) {
1442 CHN_LOCK(rdch);
1443 ret = chn_setformat(rdch,
1444 SND_FORMAT(rdch->format, *arg_i, 0));
1445 if (tmp == -1)
1446 tmp = (AFMT_CHANNEL(rdch->format) > 1)? 1 : 0;
1447 CHN_UNLOCK(rdch);
1448 }
1449 PCM_RELEASE_QUICK(d);
1450 *arg_i = tmp;
1451 break;
1452
1453 case SOUND_PCM_WRITE_CHANNELS:
1454/* case SNDCTL_DSP_CHANNELS: ( == SOUND_PCM_WRITE_CHANNELS) */
1455 if (*arg_i < 0) {
1456 *arg_i = 0;
1457 ret = EINVAL;
1458 break;
1459 }
1460 if (*arg_i != 0) {
1461 struct pcmchan_matrix *m;
1462 uint32_t ext;
1463
1464 tmp = 0;
1465 if (*arg_i > SND_CHN_MAX)
1466 *arg_i = SND_CHN_MAX;
1467
1468 m = feeder_matrix_default_channel_map(*arg_i);
1469 if (m != NULL)
1470 ext = m->ext;
1471 else
1472 ext = 0;
1473
1474 PCM_ACQUIRE_QUICK(d);
1475 if (wrch) {
1476 CHN_LOCK(wrch);
1477 ret = chn_setformat(wrch,
1478 SND_FORMAT(wrch->format, *arg_i, ext));
1479 tmp = AFMT_CHANNEL(wrch->format);
1480 CHN_UNLOCK(wrch);
1481 }
1482 if (rdch && ret == 0) {
1483 CHN_LOCK(rdch);
1484 ret = chn_setformat(rdch,
1485 SND_FORMAT(rdch->format, *arg_i, ext));
1486 if (tmp == 0)
1487 tmp = AFMT_CHANNEL(rdch->format);
1488 CHN_UNLOCK(rdch);
1489 }
1490 PCM_RELEASE_QUICK(d);
1491 *arg_i = tmp;
1492 } else {
1493 chn = wrch ? wrch : rdch;
1494 CHN_LOCK(chn);
1495 *arg_i = AFMT_CHANNEL(chn->format);
1496 CHN_UNLOCK(chn);
1497 }
1498 break;
1499
1500 case SOUND_PCM_READ_CHANNELS:
1501 chn = wrch ? wrch : rdch;
1502 if (chn) {
1503 CHN_LOCK(chn);
1504 *arg_i = AFMT_CHANNEL(chn->format);
1505 CHN_UNLOCK(chn);
1506 } else {
1507 *arg_i = 0;
1508 ret = EINVAL;
1509 }
1510 break;
1511
1512 case SNDCTL_DSP_GETFMTS: /* returns a mask of supported fmts */
1513 chn = wrch ? wrch : rdch;
1514 if (chn) {
1515 CHN_LOCK(chn);
1516 *arg_i = chn_getformats(chn);
1517 CHN_UNLOCK(chn);
1518 } else {
1519 *arg_i = 0;
1520 ret = EINVAL;
1521 }
1522 break;
1523
1524 case SNDCTL_DSP_SETFMT: /* sets _one_ format */
1525 if (*arg_i != AFMT_QUERY) {
1526 tmp = 0;
1527 PCM_ACQUIRE_QUICK(d);
1528 if (wrch) {
1529 CHN_LOCK(wrch);
1530 ret = chn_setformat(wrch, SND_FORMAT(*arg_i,
1531 AFMT_CHANNEL(wrch->format),
1532 AFMT_EXTCHANNEL(wrch->format)));
1533 tmp = wrch->format;
1534 CHN_UNLOCK(wrch);
1535 }
1536 if (rdch && ret == 0) {
1537 CHN_LOCK(rdch);
1538 ret = chn_setformat(rdch, SND_FORMAT(*arg_i,
1539 AFMT_CHANNEL(rdch->format),
1540 AFMT_EXTCHANNEL(rdch->format)));
1541 if (tmp == 0)
1542 tmp = rdch->format;
1543 CHN_UNLOCK(rdch);
1544 }
1545 PCM_RELEASE_QUICK(d);
1546 *arg_i = AFMT_ENCODING(tmp);
1547 } else {
1548 chn = wrch ? wrch : rdch;
1549 CHN_LOCK(chn);
1550 *arg_i = AFMT_ENCODING(chn->format);
1551 CHN_UNLOCK(chn);
1552 }
1553 break;
1554
1555 case SNDCTL_DSP_SETFRAGMENT:
1556 DEB(printf("SNDCTL_DSP_SETFRAGMENT 0x%08x\n", *(int *)arg));
1557 {
1558 uint32_t fragln = (*arg_i) & 0x0000ffff;
1559 uint32_t maxfrags = ((*arg_i) & 0xffff0000) >> 16;
1560 uint32_t fragsz;
1561 uint32_t r_maxfrags, r_fragsz;
1562
1563 RANGE(fragln, 4, 16);
1564 fragsz = 1 << fragln;
1565
1566 if (maxfrags == 0)
1567 maxfrags = CHN_2NDBUFMAXSIZE / fragsz;
1568 if (maxfrags < 2)
1569 maxfrags = 2;
1570 if (maxfrags * fragsz > CHN_2NDBUFMAXSIZE)
1571 maxfrags = CHN_2NDBUFMAXSIZE / fragsz;
1572
1573 DEB(printf("SNDCTL_DSP_SETFRAGMENT %d frags, %d sz\n", maxfrags, fragsz));
1574 PCM_ACQUIRE_QUICK(d);
1575 if (rdch) {
1576 CHN_LOCK(rdch);
1577 ret = chn_setblocksize(rdch, maxfrags, fragsz);
1578 r_maxfrags = sndbuf_getblkcnt(rdch->bufsoft);
1579 r_fragsz = sndbuf_getblksz(rdch->bufsoft);
1580 CHN_UNLOCK(rdch);
1581 } else {
1582 r_maxfrags = maxfrags;
1583 r_fragsz = fragsz;
1584 }
1585 if (wrch && ret == 0) {
1586 CHN_LOCK(wrch);
1587 ret = chn_setblocksize(wrch, maxfrags, fragsz);
1588 maxfrags = sndbuf_getblkcnt(wrch->bufsoft);
1589 fragsz = sndbuf_getblksz(wrch->bufsoft);
1590 CHN_UNLOCK(wrch);
1591 } else { /* use whatever came from the read channel */
1592 maxfrags = r_maxfrags;
1593 fragsz = r_fragsz;
1594 }
1595 PCM_RELEASE_QUICK(d);
1596
1597 fragln = 0;
1598 while (fragsz > 1) {
1599 fragln++;
1600 fragsz >>= 1;
1601 }
1602 *arg_i = (maxfrags << 16) | fragln;
1603 }
1604 break;
1605
1606 case SNDCTL_DSP_GETISPACE:
1607 /* return the size of data available in the input queue */
1608 {
1609 audio_buf_info *a = (audio_buf_info *)arg;
1610 if (rdch) {
1611 struct snd_dbuf *bs = rdch->bufsoft;
1612
1613 CHN_LOCK(rdch);
1614 a->bytes = sndbuf_getready(bs);
1615 a->fragments = a->bytes / sndbuf_getblksz(bs);
1616 a->fragstotal = sndbuf_getblkcnt(bs);
1617 a->fragsize = sndbuf_getblksz(bs);
1618 CHN_UNLOCK(rdch);
1619 } else
1620 ret = EINVAL;
1621 }
1622 break;
1623
1624 case SNDCTL_DSP_GETOSPACE:
1625 /* return space available in the output queue */
1626 {
1627 audio_buf_info *a = (audio_buf_info *)arg;
1628 if (wrch) {
1629 struct snd_dbuf *bs = wrch->bufsoft;
1630
1631 CHN_LOCK(wrch);
1632 /* XXX abusive DMA update: chn_wrupdate(wrch); */
1633 a->bytes = sndbuf_getfree(bs);
1634 a->fragments = a->bytes / sndbuf_getblksz(bs);
1635 a->fragstotal = sndbuf_getblkcnt(bs);
1636 a->fragsize = sndbuf_getblksz(bs);
1637 CHN_UNLOCK(wrch);
1638 } else
1639 ret = EINVAL;
1640 }
1641 break;
1642
1643 case SNDCTL_DSP_GETIPTR:
1644 {
1645 count_info *a = (count_info *)arg;
1646 if (rdch) {
1647 struct snd_dbuf *bs = rdch->bufsoft;
1648
1649 CHN_LOCK(rdch);
1650 /* XXX abusive DMA update: chn_rdupdate(rdch); */
1651 a->bytes = sndbuf_gettotal(bs);
1652 a->blocks = sndbuf_getblocks(bs) - rdch->blocks;
1653 a->ptr = sndbuf_getreadyptr(bs);
1654 rdch->blocks = sndbuf_getblocks(bs);
1655 CHN_UNLOCK(rdch);
1656 } else
1657 ret = EINVAL;
1658 }
1659 break;
1660
1661 case SNDCTL_DSP_GETOPTR:
1662 {
1663 count_info *a = (count_info *)arg;
1664 if (wrch) {
1665 struct snd_dbuf *bs = wrch->bufsoft;
1666
1667 CHN_LOCK(wrch);
1668 /* XXX abusive DMA update: chn_wrupdate(wrch); */
1669 a->bytes = sndbuf_gettotal(bs);
1670 a->blocks = sndbuf_getblocks(bs) - wrch->blocks;
1671 a->ptr = sndbuf_getreadyptr(bs);
1672 wrch->blocks = sndbuf_getblocks(bs);
1673 CHN_UNLOCK(wrch);
1674 } else
1675 ret = EINVAL;
1676 }
1677 break;
1678
1679 case SNDCTL_DSP_GETCAPS:
1680 PCM_LOCK(d);
1681 *arg_i = PCM_CAP_REALTIME | PCM_CAP_MMAP | PCM_CAP_TRIGGER;
1682 if (rdch && wrch && !(dsp_get_flags(i_dev) & SD_F_SIMPLEX))
1683 *arg_i |= PCM_CAP_DUPLEX;
1684 PCM_UNLOCK(d);
1685 break;
1686
1687 case SOUND_PCM_READ_BITS:
1688 chn = wrch ? wrch : rdch;
1689 if (chn) {
1690 CHN_LOCK(chn);
1691 if (chn->format & AFMT_8BIT)
1692 *arg_i = 8;
1693 else if (chn->format & AFMT_16BIT)
1694 *arg_i = 16;
1695 else if (chn->format & AFMT_24BIT)
1696 *arg_i = 24;
1697 else if (chn->format & AFMT_32BIT)
1698 *arg_i = 32;
1699 else
1700 ret = EINVAL;
1701 CHN_UNLOCK(chn);
1702 } else {
1703 *arg_i = 0;
1704 ret = EINVAL;
1705 }
1706 break;
1707
1708 case SNDCTL_DSP_SETTRIGGER:
1709 if (rdch) {
1710 CHN_LOCK(rdch);
1711 rdch->flags &= ~CHN_F_NOTRIGGER;
1712 if (*arg_i & PCM_ENABLE_INPUT)
1713 chn_start(rdch, 1);
1714 else {
1715 chn_abort(rdch);
1716 chn_resetbuf(rdch);
1717 rdch->flags |= CHN_F_NOTRIGGER;
1718 }
1719 CHN_UNLOCK(rdch);
1720 }
1721 if (wrch) {
1722 CHN_LOCK(wrch);
1723 wrch->flags &= ~CHN_F_NOTRIGGER;
1724 if (*arg_i & PCM_ENABLE_OUTPUT)
1725 chn_start(wrch, 1);
1726 else {
1727 chn_abort(wrch);
1728 chn_resetbuf(wrch);
1729 wrch->flags |= CHN_F_NOTRIGGER;
1730 }
1731 CHN_UNLOCK(wrch);
1732 }
1733 break;
1734
1735 case SNDCTL_DSP_GETTRIGGER:
1736 *arg_i = 0;
1737 if (wrch) {
1738 CHN_LOCK(wrch);
1739 if (wrch->flags & CHN_F_TRIGGERED)
1740 *arg_i |= PCM_ENABLE_OUTPUT;
1741 CHN_UNLOCK(wrch);
1742 }
1743 if (rdch) {
1744 CHN_LOCK(rdch);
1745 if (rdch->flags & CHN_F_TRIGGERED)
1746 *arg_i |= PCM_ENABLE_INPUT;
1747 CHN_UNLOCK(rdch);
1748 }
1749 break;
1750
1751 case SNDCTL_DSP_GETODELAY:
1752 if (wrch) {
1753 struct snd_dbuf *bs = wrch->bufsoft;
1754
1755 CHN_LOCK(wrch);
1756 /* XXX abusive DMA update: chn_wrupdate(wrch); */
1757 *arg_i = sndbuf_getready(bs);
1758 CHN_UNLOCK(wrch);
1759 } else
1760 ret = EINVAL;
1761 break;
1762
1763 case SNDCTL_DSP_POST:
1764 if (wrch) {
1765 CHN_LOCK(wrch);
1766 wrch->flags &= ~CHN_F_NOTRIGGER;
1767 chn_start(wrch, 1);
1768 CHN_UNLOCK(wrch);
1769 }
1770 break;
1771
1772 case SNDCTL_DSP_SETDUPLEX:
1773 /*
1774 * switch to full-duplex mode if card is in half-duplex
1775 * mode and is able to work in full-duplex mode
1776 */
1777 PCM_LOCK(d);
1778 if (rdch && wrch && (dsp_get_flags(i_dev) & SD_F_SIMPLEX))
1779 dsp_set_flags(i_dev, dsp_get_flags(i_dev)^SD_F_SIMPLEX);
1780 PCM_UNLOCK(d);
1781 break;
1782
1783 /*
1784 * The following four ioctls are simple wrappers around mixer_ioctl
1785 * with no further processing. xcmd is short for "translated
1786 * command".
1787 */
1788 case SNDCTL_DSP_GETRECVOL:
1789 if (xcmd == 0) {
1790 xcmd = SOUND_MIXER_READ_RECLEV;
1791 chn = rdch;
1792 }
1793 /* FALLTHROUGH */
1794 case SNDCTL_DSP_SETRECVOL:
1795 if (xcmd == 0) {
1796 xcmd = SOUND_MIXER_WRITE_RECLEV;
1797 chn = rdch;
1798 }
1799 /* FALLTHROUGH */
1800 case SNDCTL_DSP_GETPLAYVOL:
1801 if (xcmd == 0) {
1802 xcmd = SOUND_MIXER_READ_PCM;
1803 chn = wrch;
1804 }
1805 /* FALLTHROUGH */
1806 case SNDCTL_DSP_SETPLAYVOL:
1807 if (xcmd == 0) {
1808 xcmd = SOUND_MIXER_WRITE_PCM;
1809 chn = wrch;
1810 }
1811
1812 ret = dsp_ioctl_channel(i_dev, chn, xcmd, arg);
1813 if (ret != -1) {
1814 PCM_GIANT_EXIT(d);
1815 return (ret);
1816 }
1817
1818 if (d->mixer_dev != NULL) {
1819 PCM_ACQUIRE_QUICK(d);
1820 ret = mixer_ioctl_cmd(d->mixer_dev, xcmd, arg, -1, td,
1821 MIXER_CMD_DIRECT);
1822 PCM_RELEASE_QUICK(d);
1823 } else
1824 ret = ENOTSUP;
1825
1826 break;
1827
1828 case SNDCTL_DSP_GET_RECSRC_NAMES:
1829 case SNDCTL_DSP_GET_RECSRC:
1830 case SNDCTL_DSP_SET_RECSRC:
1831 if (d->mixer_dev != NULL) {
1832 PCM_ACQUIRE_QUICK(d);
1833 ret = mixer_ioctl_cmd(d->mixer_dev, cmd, arg, -1, td,
1834 MIXER_CMD_DIRECT);
1835 PCM_RELEASE_QUICK(d);
1836 } else
1837 ret = ENOTSUP;
1838 break;
1839
1840 /*
1841 * The following 3 ioctls aren't very useful at the moment. For
1842 * now, only a single channel is associated with a cdev (/dev/dspN
1843 * instance), so there's only a single output routing to use (i.e.,
1844 * the wrch bound to this cdev).
1845 */
1846 case SNDCTL_DSP_GET_PLAYTGT_NAMES:
1847 {
1848 oss_mixer_enuminfo *ei;
1849 ei = (oss_mixer_enuminfo *)arg;
1850 ei->dev = 0;
1851 ei->ctrl = 0;
1852 ei->version = 0; /* static for now */
1853 ei->strindex[0] = 0;
1854
1855 if (wrch != NULL) {
1856 ei->nvalues = 1;
1857 strlcpy(ei->strings, wrch->name,
1858 sizeof(ei->strings));
1859 } else {
1860 ei->nvalues = 0;
1861 ei->strings[0] = '\0';
1862 }
1863 }
1864 break;
1865 case SNDCTL_DSP_GET_PLAYTGT:
1866 case SNDCTL_DSP_SET_PLAYTGT: /* yes, they are the same for now */
1867 /*
1868 * Re: SET_PLAYTGT
1869 * OSSv4: "The value that was accepted by the device will
1870 * be returned back in the variable pointed by the
1871 * argument."
1872 */
1873 if (wrch != NULL)
1874 *arg_i = 0;
1875 else
1876 ret = EINVAL;
1877 break;
1878
1879 case SNDCTL_DSP_SILENCE:
1880 /*
1881 * Flush the software (pre-feed) buffer, but try to minimize playback
1882 * interruption. (I.e., record unplayed samples with intent to
1883 * restore by SNDCTL_DSP_SKIP.) Intended for application "pause"
1884 * functionality.
1885 */
1886 if (wrch == NULL)
1887 ret = EINVAL;
1888 else {
1889 struct snd_dbuf *bs;
1890 CHN_LOCK(wrch);
1891 while (wrch->inprog != 0)
1892 cv_wait(&wrch->cv, wrch->lock);
1893 bs = wrch->bufsoft;
1894 if ((bs->shadbuf != NULL) && (sndbuf_getready(bs) > 0)) {
1895 bs->sl = sndbuf_getready(bs);
1896 sndbuf_dispose(bs, bs->shadbuf, sndbuf_getready(bs));
1897 sndbuf_fillsilence(bs);
1898 chn_start(wrch, 0);
1899 }
1900 CHN_UNLOCK(wrch);
1901 }
1902 break;
1903
1904 case SNDCTL_DSP_SKIP:
1905 /*
1906 * OSSv4 docs: "This ioctl call discards all unplayed samples in the
1907 * playback buffer by moving the current write position immediately
1908 * before the point where the device is currently reading the samples."
1909 */
1910 if (wrch == NULL)
1911 ret = EINVAL;
1912 else {
1913 struct snd_dbuf *bs;
1914 CHN_LOCK(wrch);
1915 while (wrch->inprog != 0)
1916 cv_wait(&wrch->cv, wrch->lock);
1917 bs = wrch->bufsoft;
1918 if ((bs->shadbuf != NULL) && (bs->sl > 0)) {
1919 sndbuf_softreset(bs);
1920 sndbuf_acquire(bs, bs->shadbuf, bs->sl);
1921 bs->sl = 0;
1922 chn_start(wrch, 0);
1923 }
1924 CHN_UNLOCK(wrch);
1925 }
1926 break;
1927
1928 case SNDCTL_DSP_CURRENT_OPTR:
1929 case SNDCTL_DSP_CURRENT_IPTR:
1930 /**
1931 * @note Changing formats resets the buffer counters, which differs
1932 * from the 4Front drivers. However, I don't expect this to be
1933 * much of a problem.
1934 *
1935 * @note In a test where @c CURRENT_OPTR is called immediately after write
1936 * returns, this driver is about 32K samples behind whereas
1937 * 4Front's is about 8K samples behind. Should determine source
1938 * of discrepancy, even if only out of curiosity.
1939 *
1940 * @todo Actually test SNDCTL_DSP_CURRENT_IPTR.
1941 */
1942 chn = (cmd == SNDCTL_DSP_CURRENT_OPTR) ? wrch : rdch;
1943 if (chn == NULL)
1944 ret = EINVAL;
1945 else {
1946 struct snd_dbuf *bs;
1947 /* int tmp; */
1948
1949 oss_count_t *oc = (oss_count_t *)arg;
1950
1951 CHN_LOCK(chn);
1952 bs = chn->bufsoft;
1953#if 0
1954 tmp = (sndbuf_getsize(b) + chn_getptr(chn) - sndbuf_gethwptr(b)) % sndbuf_getsize(b);
1955 oc->samples = (sndbuf_gettotal(b) + tmp) / sndbuf_getalign(b);
1956 oc->fifo_samples = (sndbuf_getready(b) - tmp) / sndbuf_getalign(b);
1957#else
1958 oc->samples = sndbuf_gettotal(bs) / sndbuf_getalign(bs);
1959 oc->fifo_samples = sndbuf_getready(bs) / sndbuf_getalign(bs);
1960#endif
1961 CHN_UNLOCK(chn);
1962 }
1963 break;
1964
1965 case SNDCTL_DSP_HALT_OUTPUT:
1966 case SNDCTL_DSP_HALT_INPUT:
1967 chn = (cmd == SNDCTL_DSP_HALT_OUTPUT) ? wrch : rdch;
1968 if (chn == NULL)
1969 ret = EINVAL;
1970 else {
1971 CHN_LOCK(chn);
1972 chn_abort(chn);
1973 CHN_UNLOCK(chn);
1974 }
1975 break;
1976
1977 case SNDCTL_DSP_LOW_WATER:
1978 /*
1979 * Set the number of bytes required to attract attention by
1980 * select/poll.
1981 */
1982 if (wrch != NULL) {
1983 CHN_LOCK(wrch);
1984 wrch->lw = (*arg_i > 1) ? *arg_i : 1;
1985 CHN_UNLOCK(wrch);
1986 }
1987 if (rdch != NULL) {
1988 CHN_LOCK(rdch);
1989 rdch->lw = (*arg_i > 1) ? *arg_i : 1;
1990 CHN_UNLOCK(rdch);
1991 }
1992 break;
1993
1994 case SNDCTL_DSP_GETERROR:
1995 /*
1996 * OSSv4 docs: "All errors and counters will automatically be
1997 * cleared to zeroes after the call so each call will return only
1998 * the errors that occurred after the previous invocation. ... The
1999 * play_underruns and rec_overrun fields are the only usefull fields
2000 * returned by OSS 4.0."
2001 */
2002 {
2003 audio_errinfo *ei = (audio_errinfo *)arg;
2004
2005 bzero((void *)ei, sizeof(*ei));
2006
2007 if (wrch != NULL) {
2008 CHN_LOCK(wrch);
2009 ei->play_underruns = wrch->xruns;
2010 wrch->xruns = 0;
2011 CHN_UNLOCK(wrch);
2012 }
2013 if (rdch != NULL) {
2014 CHN_LOCK(rdch);
2015 ei->rec_overruns = rdch->xruns;
2016 rdch->xruns = 0;
2017 CHN_UNLOCK(rdch);
2018 }
2019 }
2020 break;
2021
2022 case SNDCTL_DSP_SYNCGROUP:
2023 PCM_ACQUIRE_QUICK(d);
2024 ret = dsp_oss_syncgroup(wrch, rdch, (oss_syncgroup *)arg);
2025 PCM_RELEASE_QUICK(d);
2026 break;
2027
2028 case SNDCTL_DSP_SYNCSTART:
2029 PCM_ACQUIRE_QUICK(d);
2030 ret = dsp_oss_syncstart(*arg_i);
2031 PCM_RELEASE_QUICK(d);
2032 break;
2033
2034 case SNDCTL_DSP_POLICY:
2035 PCM_ACQUIRE_QUICK(d);
2036 ret = dsp_oss_policy(wrch, rdch, *arg_i);
2037 PCM_RELEASE_QUICK(d);
2038 break;
2039
2040 case SNDCTL_DSP_COOKEDMODE:
2041 PCM_ACQUIRE_QUICK(d);
2042 if (!(dsp_get_flags(i_dev) & SD_F_BITPERFECT))
2043 ret = dsp_oss_cookedmode(wrch, rdch, *arg_i);
2044 PCM_RELEASE_QUICK(d);
2045 break;
2046 case SNDCTL_DSP_GET_CHNORDER:
2047 PCM_ACQUIRE_QUICK(d);
2048 ret = dsp_oss_getchnorder(wrch, rdch, (unsigned long long *)arg);
2049 PCM_RELEASE_QUICK(d);
2050 break;
2051 case SNDCTL_DSP_SET_CHNORDER:
2052 PCM_ACQUIRE_QUICK(d);
2053 ret = dsp_oss_setchnorder(wrch, rdch, (unsigned long long *)arg);
2054 PCM_RELEASE_QUICK(d);
2055 break;
2056 case SNDCTL_DSP_GETCHANNELMASK: /* XXX vlc */
2057 PCM_ACQUIRE_QUICK(d);
2058 ret = dsp_oss_getchannelmask(wrch, rdch, (int *)arg);
2059 PCM_RELEASE_QUICK(d);
2060 break;
2061 case SNDCTL_DSP_BIND_CHANNEL: /* XXX what?!? */
2062 ret = EINVAL;
2063 break;
2064#ifdef OSSV4_EXPERIMENT
2065 /*
2066 * XXX The following ioctls are not yet supported and just return
2067 * EINVAL.
2068 */
2069 case SNDCTL_DSP_GETOPEAKS:
2070 case SNDCTL_DSP_GETIPEAKS:
2071 chn = (cmd == SNDCTL_DSP_GETOPEAKS) ? wrch : rdch;
2072 if (chn == NULL)
2073 ret = EINVAL;
2074 else {
2075 oss_peaks_t *op = (oss_peaks_t *)arg;
2076 int lpeak, rpeak;
2077
2078 CHN_LOCK(chn);
2079 ret = chn_getpeaks(chn, &lpeak, &rpeak);
2080 if (ret == -1)
2081 ret = EINVAL;
2082 else {
2083 (*op)[0] = lpeak;
2084 (*op)[1] = rpeak;
2085 }
2086 CHN_UNLOCK(chn);
2087 }
2088 break;
2089
2090 /*
2091 * XXX Once implemented, revisit this for proper cv protection
2092 * (if necessary).
2093 */
2094 case SNDCTL_GETLABEL:
2095 ret = dsp_oss_getlabel(wrch, rdch, (oss_label_t *)arg);
2096 break;
2097 case SNDCTL_SETLABEL:
2098 ret = dsp_oss_setlabel(wrch, rdch, (oss_label_t *)arg);
2099 break;
2100 case SNDCTL_GETSONG:
2101 ret = dsp_oss_getsong(wrch, rdch, (oss_longname_t *)arg);
2102 break;
2103 case SNDCTL_SETSONG:
2104 ret = dsp_oss_setsong(wrch, rdch, (oss_longname_t *)arg);
2105 break;
2106 case SNDCTL_SETNAME:
2107 ret = dsp_oss_setname(wrch, rdch, (oss_longname_t *)arg);
2108 break;
2109#if 0
2110 /**
2111 * @note The S/PDIF interface ioctls, @c SNDCTL_DSP_READCTL and
2112 * @c SNDCTL_DSP_WRITECTL have been omitted at the suggestion of
2113 * 4Front Technologies.
2114 */
2115 case SNDCTL_DSP_READCTL:
2116 case SNDCTL_DSP_WRITECTL:
2117 ret = EINVAL;
2118 break;
2119#endif /* !0 (explicitly omitted ioctls) */
2120
2121#endif /* !OSSV4_EXPERIMENT */
2122 case SNDCTL_DSP_MAPINBUF:
2123 case SNDCTL_DSP_MAPOUTBUF:
2124 case SNDCTL_DSP_SETSYNCRO:
2125 /* undocumented */
2126
2127 case SNDCTL_DSP_SUBDIVIDE:
2128 case SOUND_PCM_WRITE_FILTER:
2129 case SOUND_PCM_READ_FILTER:
2130 /* dunno what these do, don't sound important */
2131
2132 default:
2133 DEB(printf("default ioctl fn 0x%08lx fail\n", cmd));
2134 ret = EINVAL;
2135 break;
2136 }
2137
2138 PCM_GIANT_LEAVE(d);
2139
2140 return (ret);
2141}
2142
2143static int
2144dsp_poll(struct cdev *i_dev, int events, struct thread *td)
2145{
2146 struct snddev_info *d;
2147 struct pcm_channel *wrch, *rdch;
2148 int ret, e;
2149
2150 d = dsp_get_info(i_dev);
2151 if (!DSP_REGISTERED(d, i_dev))
2152 return (EBADF);
2153
2154 PCM_GIANT_ENTER(d);
2155
2156 wrch = NULL;
2157 rdch = NULL;
2158 ret = 0;
2159
2160 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
2161
2162 if (wrch != NULL && !(wrch->flags & CHN_F_DEAD)) {
2163 e = (events & (POLLOUT | POLLWRNORM));
2164 if (e)
2165 ret |= chn_poll(wrch, e, td);
2166 }
2167
2168 if (rdch != NULL && !(rdch->flags & CHN_F_DEAD)) {
2169 e = (events & (POLLIN | POLLRDNORM));
2170 if (e)
2171 ret |= chn_poll(rdch, e, td);
2172 }
2173
2174 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
2175
2176 PCM_GIANT_LEAVE(d);
2177
2178 return (ret);
2179}
2180
2181static int
|
2183{
2184 struct snddev_info *d;
2185 struct pcm_channel *wrch, *rdch, *c;
2186
2187 /*
2188 * Reject PROT_EXEC by default. It just doesn't makes sense.
2189 * Unfortunately, we have to give up this one due to linux_mmap
2190 * changes.
2191 *
2192 * http://lists.freebsd.org/pipermail/freebsd-emulation/2007-June/003698.html
2193 *
2194 */
2195#ifdef SV_ABI_LINUX
2196 if ((nprot & PROT_EXEC) && (dsp_mmap_allow_prot_exec < 0 ||
2197 (dsp_mmap_allow_prot_exec == 0 &&
2198 SV_CURPROC_ABI() != SV_ABI_LINUX)))
2199#else
2200 if ((nprot & PROT_EXEC) && dsp_mmap_allow_prot_exec < 1)
2201#endif
2202 return (-1);
2203
2204 d = dsp_get_info(i_dev);
2205 if (!DSP_REGISTERED(d, i_dev))
2206 return (-1);
2207
2208 PCM_GIANT_ENTER(d);
2209
2210 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
2211
2212 /*
2213 * XXX The linux api uses the nprot to select read/write buffer
2214 * our vm system doesn't allow this, so force write buffer.
2215 *
2216 * This is just a quack to fool full-duplex mmap, so that at
2217 * least playback _or_ recording works. If you really got the
2218 * urge to make _both_ work at the same time, avoid O_RDWR.
2219 * Just open each direction separately and mmap() it.
2220 *
2221 * Failure is not an option due to INVARIANTS check within
2222 * device_pager.c, which means, we have to give up one over
2223 * another.
2224 */
2225 c = (wrch != NULL) ? wrch : rdch;
2226
2227 if (c == NULL || (c->flags & CHN_F_MMAP_INVALID) ||
2228 offset >= sndbuf_getsize(c->bufsoft) ||
2229 (wrch != NULL && (wrch->flags & CHN_F_MMAP_INVALID)) ||
2230 (rdch != NULL && (rdch->flags & CHN_F_MMAP_INVALID))) {
2231 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
2232 PCM_GIANT_EXIT(d);
2233 return (-1);
2234 }
2235
2236 /* XXX full-duplex quack. */
2237 if (wrch != NULL)
2238 wrch->flags |= CHN_F_MMAP;
2239 if (rdch != NULL)
2240 rdch->flags |= CHN_F_MMAP;
2241
2242 *paddr = vtophys(sndbuf_getbufofs(c->bufsoft, offset));
2243 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
2244
2245 PCM_GIANT_LEAVE(d);
2246
2247 return (0);
2248}
2249
2250/* So much for dev_stdclone() */
2251static int
2252dsp_stdclone(char *name, char *namep, char *sep, int use_sep, int *u, int *c)
2253{
2254 size_t len;
2255
2256 len = strlen(namep);
2257
2258 if (bcmp(name, namep, len) != 0)
2259 return (ENODEV);
2260
2261 name += len;
2262
2263 if (isdigit(*name) == 0)
2264 return (ENODEV);
2265
2266 len = strlen(sep);
2267
2268 if (*name == '0' && !(name[1] == '\0' || bcmp(name + 1, sep, len) == 0))
2269 return (ENODEV);
2270
2271 for (*u = 0; isdigit(*name) != 0; name++) {
2272 *u *= 10;
2273 *u += *name - '0';
2274 if (*u > dsp_umax)
2275 return (ENODEV);
2276 }
2277
2278 if (*name == '\0')
2279 return ((use_sep == 0) ? 0 : ENODEV);
2280
2281 if (bcmp(name, sep, len) != 0 || isdigit(name[len]) == 0)
2282 return (ENODEV);
2283
2284 name += len;
2285
2286 if (*name == '0' && name[1] != '\0')
2287 return (ENODEV);
2288
2289 for (*c = 0; isdigit(*name) != 0; name++) {
2290 *c *= 10;
2291 *c += *name - '0';
2292 if (*c > dsp_cmax)
2293 return (ENODEV);
2294 }
2295
2296 if (*name != '\0')
2297 return (ENODEV);
2298
2299 return (0);
2300}
2301
2302static void
2303dsp_clone(void *arg,
2304#if __FreeBSD_version >= 600034
2305 struct ucred *cred,
2306#endif
2307 char *name, int namelen, struct cdev **dev)
2308{
2309 struct snddev_info *d;
2310 struct snd_clone_entry *ce;
2311 struct pcm_channel *c;
2312 int i, unit, udcmask, cunit, devtype, devhw, devcmax, tumax;
2313 char *devname, *devcmp, *devsep;
2314
2315 KASSERT(dsp_umax >= 0 && dsp_cmax >= 0, ("Uninitialized unit!"));
2316
2317 if (*dev != NULL)
2318 return;
2319
2320 unit = -1;
2321 cunit = -1;
2322 devtype = -1;
2323 devhw = 0;
2324 devcmax = -1;
2325 tumax = -1;
2326 devname = NULL;
2327 devsep = NULL;
2328
2329 for (i = 0; unit == -1 &&
2330 i < (sizeof(dsp_cdevs) / sizeof(dsp_cdevs[0])); i++) {
2331 devtype = dsp_cdevs[i].type;
2332 devcmp = dsp_cdevs[i].name;
2333 devsep = dsp_cdevs[i].sep;
2334 devname = dsp_cdevs[i].alias;
2335 if (devname == NULL)
2336 devname = devcmp;
2337 devhw = dsp_cdevs[i].hw;
2338 devcmax = dsp_cdevs[i].max - 1;
2339 if (strcmp(name, devcmp) == 0)
2340 unit = snd_unit;
2341 else if (dsp_stdclone(name, devcmp, devsep,
2342 dsp_cdevs[i].use_sep, &unit, &cunit) != 0) {
2343 unit = -1;
2344 cunit = -1;
2345 }
2346 }
2347
2348 d = devclass_get_softc(pcm_devclass, unit);
2349 if (!PCM_REGISTERED(d) || d->clones == NULL)
2350 return;
2351
2352 /* XXX Need Giant magic entry ??? */
2353
2354 PCM_LOCK(d);
2355 if (snd_clone_disabled(d->clones)) {
2356 PCM_UNLOCK(d);
2357 return;
2358 }
2359
2360 PCM_WAIT(d);
2361 PCM_ACQUIRE(d);
2362 PCM_UNLOCK(d);
2363
2364 udcmask = snd_u2unit(unit) | snd_d2unit(devtype);
2365
2366 if (devhw != 0) {
2367 KASSERT(devcmax <= dsp_cmax,
2368 ("overflow: devcmax=%d, dsp_cmax=%d", devcmax, dsp_cmax));
2369 if (cunit > devcmax) {
2370 PCM_RELEASE_QUICK(d);
2371 return;
2372 }
2373 udcmask |= snd_c2unit(cunit);
2374 CHN_FOREACH(c, d, channels.pcm) {
2375 CHN_LOCK(c);
2376 if (c->unit != udcmask) {
2377 CHN_UNLOCK(c);
2378 continue;
2379 }
2380 CHN_UNLOCK(c);
2381 udcmask &= ~snd_c2unit(cunit);
2382 /*
2383 * Temporarily increase clone maxunit to overcome
2384 * vchan flexibility.
2385 *
2386 * # sysctl dev.pcm.0.play.vchans=256
2387 * dev.pcm.0.play.vchans: 1 -> 256
2388 * # cat /dev/zero > /dev/dsp0.vp255 &
2389 * [1] 17296
2390 * # sysctl dev.pcm.0.play.vchans=0
2391 * dev.pcm.0.play.vchans: 256 -> 1
2392 * # fg
2393 * [1] + running cat /dev/zero > /dev/dsp0.vp255
2394 * ^C
2395 * # cat /dev/zero > /dev/dsp0.vp255
2396 * zsh: operation not supported: /dev/dsp0.vp255
2397 */
2398 tumax = snd_clone_getmaxunit(d->clones);
2399 if (cunit > tumax)
2400 snd_clone_setmaxunit(d->clones, cunit);
2401 else
2402 tumax = -1;
2403 goto dsp_clone_alloc;
2404 }
2405 /*
2406 * Ok, so we're requesting unallocated vchan, but still
2407 * within maximum vchan limit.
2408 */
2409 if (((devtype == SND_DEV_DSPHW_VPLAY && d->pvchancount > 0) ||
2410 (devtype == SND_DEV_DSPHW_VREC && d->rvchancount > 0)) &&
2411 cunit < snd_maxautovchans) {
2412 udcmask &= ~snd_c2unit(cunit);
2413 tumax = snd_clone_getmaxunit(d->clones);
2414 if (cunit > tumax)
2415 snd_clone_setmaxunit(d->clones, cunit);
2416 else
2417 tumax = -1;
2418 goto dsp_clone_alloc;
2419 }
2420 PCM_RELEASE_QUICK(d);
2421 return;
2422 }
2423
2424dsp_clone_alloc:
2425 ce = snd_clone_alloc(d->clones, dev, &cunit, udcmask);
2426 if (tumax != -1)
2427 snd_clone_setmaxunit(d->clones, tumax);
2428 if (ce != NULL) {
2429 udcmask |= snd_c2unit(cunit);
2430 *dev = make_dev(&dsp_cdevsw, PCMMINOR(udcmask),
2431 UID_ROOT, GID_WHEEL, 0666, "%s%d%s%d",
2432 devname, unit, devsep, cunit);
2433 snd_clone_register(ce, *dev);
2434 }
2435
2436 PCM_RELEASE_QUICK(d);
2437
2438 if (*dev != NULL)
2439 dev_ref(*dev);
2440}
2441
2442static void
2443dsp_sysinit(void *p)
2444{
2445 if (dsp_ehtag != NULL)
2446 return;
2447 /* initialize unit numbering */
2448 snd_unit_init();
2449 dsp_umax = PCMMAXUNIT;
2450 dsp_cmax = PCMMAXCHAN;
2451 dsp_ehtag = EVENTHANDLER_REGISTER(dev_clone, dsp_clone, 0, 1000);
2452}
2453
2454static void
2455dsp_sysuninit(void *p)
2456{
2457 if (dsp_ehtag == NULL)
2458 return;
2459 EVENTHANDLER_DEREGISTER(dev_clone, dsp_ehtag);
2460 dsp_ehtag = NULL;
2461}
2462
2463SYSINIT(dsp_sysinit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysinit, NULL);
2464SYSUNINIT(dsp_sysuninit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysuninit, NULL);
2465
2466char *
2467dsp_unit2name(char *buf, size_t len, int unit)
2468{
2469 int i, dtype;
2470
2471 KASSERT(buf != NULL && len != 0,
2472 ("bogus buf=%p len=%ju", buf, (uintmax_t)len));
2473
2474 dtype = snd_unit2d(unit);
2475
2476 for (i = 0; i < (sizeof(dsp_cdevs) / sizeof(dsp_cdevs[0])); i++) {
2477 if (dtype != dsp_cdevs[i].type || dsp_cdevs[i].alias != NULL)
2478 continue;
2479 snprintf(buf, len, "%s%d%s%d", dsp_cdevs[i].name,
2480 snd_unit2u(unit), dsp_cdevs[i].sep, snd_unit2c(unit));
2481 return (buf);
2482 }
2483
2484 return (NULL);
2485}
2486
2487/**
2488 * @brief Handler for SNDCTL_AUDIOINFO.
2489 *
2490 * Gathers information about the audio device specified in ai->dev. If
2491 * ai->dev == -1, then this function gathers information about the current
2492 * device. If the call comes in on a non-audio device and ai->dev == -1,
2493 * return EINVAL.
2494 *
2495 * This routine is supposed to go practically straight to the hardware,
2496 * getting capabilities directly from the sound card driver, side-stepping
2497 * the intermediate channel interface.
2498 *
2499 * Note, however, that the usefulness of this command is significantly
2500 * decreased when requesting info about any device other than the one serving
2501 * the request. While each snddev_channel refers to a specific device node,
2502 * the converse is *not* true. Currently, when a sound device node is opened,
2503 * the sound subsystem scans for an available audio channel (or channels, if
2504 * opened in read+write) and then assigns them to the si_drv[12] private
2505 * data fields. As a result, any information returned linking a channel to
2506 * a specific character device isn't necessarily accurate.
2507 *
2508 * @note
2509 * Calling threads must not hold any snddev_info or pcm_channel locks.
2510 *
2511 * @param dev device on which the ioctl was issued
2512 * @param ai ioctl request data container
2513 *
2514 * @retval 0 success
2515 * @retval EINVAL ai->dev specifies an invalid device
2516 *
2517 * @todo Verify correctness of Doxygen tags. ;)
2518 */
2519int
2520dsp_oss_audioinfo(struct cdev *i_dev, oss_audioinfo *ai)
2521{
2522 struct pcmchan_caps *caps;
2523 struct pcm_channel *ch;
2524 struct snddev_info *d;
2525 uint32_t fmts;
2526 int i, nchan, *rates, minch, maxch;
2527 char *devname, buf[CHN_NAMELEN];
2528
2529 /*
2530 * If probing the device that received the ioctl, make sure it's a
2531 * DSP device. (Users may use this ioctl with /dev/mixer and
2532 * /dev/midi.)
2533 */
2534 if (ai->dev == -1 && i_dev->si_devsw != &dsp_cdevsw)
2535 return (EINVAL);
2536
2537 ch = NULL;
2538 devname = NULL;
2539 nchan = 0;
2540 bzero(buf, sizeof(buf));
2541
2542 /*
2543 * Search for the requested audio device (channel). Start by
2544 * iterating over pcm devices.
2545 */
2546 for (i = 0; pcm_devclass != NULL &&
2547 i < devclass_get_maxunit(pcm_devclass); i++) {
2548 d = devclass_get_softc(pcm_devclass, i);
2549 if (!PCM_REGISTERED(d))
2550 continue;
2551
2552 /* XXX Need Giant magic entry ??? */
2553
2554 /* See the note in function docblock */
2555 PCM_UNLOCKASSERT(d);
2556 PCM_LOCK(d);
2557
2558 CHN_FOREACH(ch, d, channels.pcm) {
2559 CHN_UNLOCKASSERT(ch);
2560 CHN_LOCK(ch);
2561 if (ai->dev == -1) {
2562 if (DSP_REGISTERED(d, i_dev) &&
2563 (ch == PCM_RDCH(i_dev) || /* record ch */
2564 ch == PCM_WRCH(i_dev))) { /* playback ch */
2565 devname = dsp_unit2name(buf,
2566 sizeof(buf), ch->unit);
2567 }
2568 } else if (ai->dev == nchan) {
2569 devname = dsp_unit2name(buf, sizeof(buf),
2570 ch->unit);
2571 }
2572 if (devname != NULL)
2573 break;
2574 CHN_UNLOCK(ch);
2575 ++nchan;
2576 }
2577
2578 if (devname != NULL) {
2579 /*
2580 * At this point, the following synchronization stuff
2581 * has happened:
2582 * - a specific PCM device is locked.
2583 * - a specific audio channel has been locked, so be
2584 * sure to unlock when exiting;
2585 */
2586
2587 caps = chn_getcaps(ch);
2588
2589 /*
2590 * With all handles collected, zero out the user's
2591 * container and begin filling in its fields.
2592 */
2593 bzero((void *)ai, sizeof(oss_audioinfo));
2594
2595 ai->dev = nchan;
2596 strlcpy(ai->name, ch->name, sizeof(ai->name));
2597
2598 if ((ch->flags & CHN_F_BUSY) == 0)
2599 ai->busy = 0;
2600 else
2601 ai->busy = (ch->direction == PCMDIR_PLAY) ? OPEN_WRITE : OPEN_READ;
2602
2603 /**
2604 * @note
2605 * @c cmd - OSSv4 docs: "Only supported under Linux at
2606 * this moment." Cop-out, I know, but I'll save
2607 * running around in the process table for later.
2608 * Is there a risk of leaking information?
2609 */
2610 ai->pid = ch->pid;
2611
2612 /*
2613 * These flags stolen from SNDCTL_DSP_GETCAPS handler.
2614 * Note, however, that a single channel operates in
2615 * only one direction, so PCM_CAP_DUPLEX is out.
2616 */
2617 /**
2618 * @todo @c SNDCTL_AUDIOINFO::caps - Make drivers keep
2619 * these in pcmchan::caps?
2620 */
2621 ai->caps = PCM_CAP_REALTIME | PCM_CAP_MMAP | PCM_CAP_TRIGGER |
2622 ((ch->direction == PCMDIR_PLAY) ? PCM_CAP_OUTPUT : PCM_CAP_INPUT);
2623
2624 /*
2625 * Collect formats supported @b natively by the
2626 * device. Also determine min/max channels. (I.e.,
2627 * mono, stereo, or both?)
2628 *
2629 * If any channel is stereo, maxch = 2;
2630 * if all channels are stereo, minch = 2, too;
2631 * if any channel is mono, minch = 1;
2632 * and if all channels are mono, maxch = 1.
2633 */
2634 minch = 0;
2635 maxch = 0;
2636 fmts = 0;
2637 for (i = 0; caps->fmtlist[i]; i++) {
2638 fmts |= caps->fmtlist[i];
2639 if (AFMT_CHANNEL(caps->fmtlist[i]) > 1) {
2640 minch = (minch == 0) ? 2 : minch;
2641 maxch = 2;
2642 } else {
2643 minch = 1;
2644 maxch = (maxch == 0) ? 1 : maxch;
2645 }
2646 }
2647
2648 if (ch->direction == PCMDIR_PLAY)
2649 ai->oformats = fmts;
2650 else
2651 ai->iformats = fmts;
2652
2653 /**
2654 * @note
2655 * @c magic - OSSv4 docs: "Reserved for internal use
2656 * by OSS."
2657 *
2658 * @par
2659 * @c card_number - OSSv4 docs: "Number of the sound
2660 * card where this device belongs or -1 if this
2661 * information is not available. Applications
2662 * should normally not use this field for any
2663 * purpose."
2664 */
2665 ai->card_number = -1;
2666 /**
2667 * @todo @c song_name - depends first on
2668 * SNDCTL_[GS]ETSONG @todo @c label - depends
2669 * on SNDCTL_[GS]ETLABEL
2670 * @todo @c port_number - routing information?
2671 */
2672 ai->port_number = -1;
2673 ai->mixer_dev = (d->mixer_dev != NULL) ? PCMUNIT(d->mixer_dev) : -1;
2674 /**
2675 * @note
2676 * @c real_device - OSSv4 docs: "Obsolete."
2677 */
2678 ai->real_device = -1;
2679 strlcpy(ai->devnode, "/dev/", sizeof(ai->devnode));
2680 strlcat(ai->devnode, devname, sizeof(ai->devnode));
2681 ai->enabled = device_is_attached(d->dev) ? 1 : 0;
2682 /**
2683 * @note
2684 * @c flags - OSSv4 docs: "Reserved for future use."
2685 *
2686 * @note
2687 * @c binding - OSSv4 docs: "Reserved for future use."
2688 *
2689 * @todo @c handle - haven't decided how to generate
2690 * this yet; bus, vendor, device IDs?
2691 */
2692 ai->min_rate = caps->minspeed;
2693 ai->max_rate = caps->maxspeed;
2694
2695 ai->min_channels = minch;
2696 ai->max_channels = maxch;
2697
2698 ai->nrates = chn_getrates(ch, &rates);
2699 if (ai->nrates > OSS_MAX_SAMPLE_RATES)
2700 ai->nrates = OSS_MAX_SAMPLE_RATES;
2701
2702 for (i = 0; i < ai->nrates; i++)
2703 ai->rates[i] = rates[i];
2704
2705 ai->next_play_engine = 0;
2706 ai->next_rec_engine = 0;
2707
2708 CHN_UNLOCK(ch);
2709 }
2710
2711 PCM_UNLOCK(d);
2712
2713 if (devname != NULL)
2714 return (0);
2715 }
2716
2717 /* Exhausted the search -- nothing is locked, so return. */
2718 return (EINVAL);
2719}
2720
2721/**
2722 * @brief Assigns a PCM channel to a sync group.
2723 *
2724 * Sync groups are used to enable audio operations on multiple devices
2725 * simultaneously. They may be used with any number of devices and may
2726 * span across applications. Devices are added to groups with
2727 * the SNDCTL_DSP_SYNCGROUP ioctl, and operations are triggered with the
2728 * SNDCTL_DSP_SYNCSTART ioctl.
2729 *
2730 * If the @c id field of the @c group parameter is set to zero, then a new
2731 * sync group is created. Otherwise, wrch and rdch (if set) are added to
2732 * the group specified.
2733 *
2734 * @todo As far as memory allocation, should we assume that things are
2735 * okay and allocate with M_WAITOK before acquiring channel locks,
2736 * freeing later if not?
2737 *
2738 * @param wrch output channel associated w/ device (if any)
2739 * @param rdch input channel associated w/ device (if any)
2740 * @param group Sync group parameters
2741 *
2742 * @retval 0 success
2743 * @retval non-zero error to be propagated upstream
2744 */
2745static int
2746dsp_oss_syncgroup(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_syncgroup *group)
2747{
2748 struct pcmchan_syncmember *smrd, *smwr;
2749 struct pcmchan_syncgroup *sg;
2750 int ret, sg_ids[3];
2751
2752 smrd = NULL;
2753 smwr = NULL;
2754 sg = NULL;
2755 ret = 0;
2756
2757 /*
2758 * Free_unr() may sleep, so store released syncgroup IDs until after
2759 * all locks are released.
2760 */
2761 sg_ids[0] = sg_ids[1] = sg_ids[2] = 0;
2762
2763 PCM_SG_LOCK();
2764
2765 /*
2766 * - Insert channel(s) into group's member list.
2767 * - Set CHN_F_NOTRIGGER on channel(s).
2768 * - Stop channel(s).
2769 */
2770
2771 /*
2772 * If device's channels are already mapped to a group, unmap them.
2773 */
2774 if (wrch) {
2775 CHN_LOCK(wrch);
2776 sg_ids[0] = chn_syncdestroy(wrch);
2777 }
2778
2779 if (rdch) {
2780 CHN_LOCK(rdch);
2781 sg_ids[1] = chn_syncdestroy(rdch);
2782 }
2783
2784 /*
2785 * Verify that mode matches character device properites.
2786 * - Bail if PCM_ENABLE_OUTPUT && wrch == NULL.
2787 * - Bail if PCM_ENABLE_INPUT && rdch == NULL.
2788 */
2789 if (((wrch == NULL) && (group->mode & PCM_ENABLE_OUTPUT)) ||
2790 ((rdch == NULL) && (group->mode & PCM_ENABLE_INPUT))) {
2791 ret = EINVAL;
2792 goto out;
2793 }
2794
2795 /*
2796 * An id of zero indicates the user wants to create a new
2797 * syncgroup.
2798 */
2799 if (group->id == 0) {
2800 sg = (struct pcmchan_syncgroup *)malloc(sizeof(*sg), M_DEVBUF, M_NOWAIT);
2801 if (sg != NULL) {
2802 SLIST_INIT(&sg->members);
2803 sg->id = alloc_unr(pcmsg_unrhdr);
2804
2805 group->id = sg->id;
2806 SLIST_INSERT_HEAD(&snd_pcm_syncgroups, sg, link);
2807 } else
2808 ret = ENOMEM;
2809 } else {
2810 SLIST_FOREACH(sg, &snd_pcm_syncgroups, link) {
2811 if (sg->id == group->id)
2812 break;
2813 }
2814 if (sg == NULL)
2815 ret = EINVAL;
2816 }
2817
2818 /* Couldn't create or find a syncgroup. Fail. */
2819 if (sg == NULL)
2820 goto out;
2821
2822 /*
2823 * Allocate a syncmember, assign it and a channel together, and
2824 * insert into syncgroup.
2825 */
2826 if (group->mode & PCM_ENABLE_INPUT) {
2827 smrd = (struct pcmchan_syncmember *)malloc(sizeof(*smrd), M_DEVBUF, M_NOWAIT);
2828 if (smrd == NULL) {
2829 ret = ENOMEM;
2830 goto out;
2831 }
2832
2833 SLIST_INSERT_HEAD(&sg->members, smrd, link);
2834 smrd->parent = sg;
2835 smrd->ch = rdch;
2836
2837 chn_abort(rdch);
2838 rdch->flags |= CHN_F_NOTRIGGER;
2839 rdch->sm = smrd;
2840 }
2841
2842 if (group->mode & PCM_ENABLE_OUTPUT) {
2843 smwr = (struct pcmchan_syncmember *)malloc(sizeof(*smwr), M_DEVBUF, M_NOWAIT);
2844 if (smwr == NULL) {
2845 ret = ENOMEM;
2846 goto out;
2847 }
2848
2849 SLIST_INSERT_HEAD(&sg->members, smwr, link);
2850 smwr->parent = sg;
2851 smwr->ch = wrch;
2852
2853 chn_abort(wrch);
2854 wrch->flags |= CHN_F_NOTRIGGER;
2855 wrch->sm = smwr;
2856 }
2857
2858
2859out:
2860 if (ret != 0) {
2861 if (smrd != NULL)
2862 free(smrd, M_DEVBUF);
2863 if ((sg != NULL) && SLIST_EMPTY(&sg->members)) {
2864 sg_ids[2] = sg->id;
2865 SLIST_REMOVE(&snd_pcm_syncgroups, sg, pcmchan_syncgroup, link);
2866 free(sg, M_DEVBUF);
2867 }
2868
2869 if (wrch)
2870 wrch->sm = NULL;
2871 if (rdch)
2872 rdch->sm = NULL;
2873 }
2874
2875 if (wrch)
2876 CHN_UNLOCK(wrch);
2877 if (rdch)
2878 CHN_UNLOCK(rdch);
2879
2880 PCM_SG_UNLOCK();
2881
2882 if (sg_ids[0])
2883 free_unr(pcmsg_unrhdr, sg_ids[0]);
2884 if (sg_ids[1])
2885 free_unr(pcmsg_unrhdr, sg_ids[1]);
2886 if (sg_ids[2])
2887 free_unr(pcmsg_unrhdr, sg_ids[2]);
2888
2889 return (ret);
2890}
2891
2892/**
2893 * @brief Launch a sync group into action
2894 *
2895 * Sync groups are established via SNDCTL_DSP_SYNCGROUP. This function
2896 * iterates over all members, triggering them along the way.
2897 *
2898 * @note Caller must not hold any channel locks.
2899 *
2900 * @param sg_id sync group identifier
2901 *
2902 * @retval 0 success
2903 * @retval non-zero error worthy of propagating upstream to user
2904 */
2905static int
2906dsp_oss_syncstart(int sg_id)
2907{
2908 struct pcmchan_syncmember *sm, *sm_tmp;
2909 struct pcmchan_syncgroup *sg;
2910 struct pcm_channel *c;
2911 int ret, needlocks;
2912
2913 /* Get the synclists lock */
2914 PCM_SG_LOCK();
2915
2916 do {
2917 ret = 0;
2918 needlocks = 0;
2919
2920 /* Search for syncgroup by ID */
2921 SLIST_FOREACH(sg, &snd_pcm_syncgroups, link) {
2922 if (sg->id == sg_id)
2923 break;
2924 }
2925
2926 /* Return EINVAL if not found */
2927 if (sg == NULL) {
2928 ret = EINVAL;
2929 break;
2930 }
2931
2932 /* Any removals resulting in an empty group should've handled this */
2933 KASSERT(!SLIST_EMPTY(&sg->members), ("found empty syncgroup"));
2934
2935 /*
2936 * Attempt to lock all member channels - if any are already
2937 * locked, unlock those acquired, sleep for a bit, and try
2938 * again.
2939 */
2940 SLIST_FOREACH(sm, &sg->members, link) {
2941 if (CHN_TRYLOCK(sm->ch) == 0) {
2942 int timo = hz * 5/1000;
2943 if (timo < 1)
2944 timo = 1;
2945
2946 /* Release all locked channels so far, retry */
2947 SLIST_FOREACH(sm_tmp, &sg->members, link) {
2948 /* sm is the member already locked */
2949 if (sm == sm_tmp)
2950 break;
2951 CHN_UNLOCK(sm_tmp->ch);
2952 }
2953
2954 /** @todo Is PRIBIO correct/ */
2955 ret = msleep(sm, &snd_pcm_syncgroups_mtx,
2956 PRIBIO | PCATCH, "pcmsg", timo);
2957 if (ret == EINTR || ret == ERESTART)
2958 break;
2959
2960 needlocks = 1;
2961 ret = 0; /* Assumes ret == EAGAIN... */
2962 }
2963 }
2964 } while (needlocks && ret == 0);
2965
2966 /* Proceed only if no errors encountered. */
2967 if (ret == 0) {
2968 /* Launch channels */
2969 while ((sm = SLIST_FIRST(&sg->members)) != NULL) {
2970 SLIST_REMOVE_HEAD(&sg->members, link);
2971
2972 c = sm->ch;
2973 c->sm = NULL;
2974 chn_start(c, 1);
2975 c->flags &= ~CHN_F_NOTRIGGER;
2976 CHN_UNLOCK(c);
2977
2978 free(sm, M_DEVBUF);
2979 }
2980
2981 SLIST_REMOVE(&snd_pcm_syncgroups, sg, pcmchan_syncgroup, link);
2982 free(sg, M_DEVBUF);
2983 }
2984
2985 PCM_SG_UNLOCK();
2986
2987 /*
2988 * Free_unr() may sleep, so be sure to give up the syncgroup lock
2989 * first.
2990 */
2991 if (ret == 0)
2992 free_unr(pcmsg_unrhdr, sg_id);
2993
2994 return (ret);
2995}
2996
2997/**
2998 * @brief Handler for SNDCTL_DSP_POLICY
2999 *
3000 * The SNDCTL_DSP_POLICY ioctl is a simpler interface to control fragment
3001 * size and count like with SNDCTL_DSP_SETFRAGMENT. Instead of the user
3002 * specifying those two parameters, s/he simply selects a number from 0..10
3003 * which corresponds to a buffer size. Smaller numbers request smaller
3004 * buffers with lower latencies (at greater overhead from more frequent
3005 * interrupts), while greater numbers behave in the opposite manner.
3006 *
3007 * The 4Front spec states that a value of 5 should be the default. However,
3008 * this implementation deviates slightly by using a linear scale without
3009 * consulting drivers. I.e., even though drivers may have different default
3010 * buffer sizes, a policy argument of 5 will have the same result across
3011 * all drivers.
3012 *
3013 * See http://manuals.opensound.com/developer/SNDCTL_DSP_POLICY.html for
3014 * more information.
3015 *
3016 * @todo When SNDCTL_DSP_COOKEDMODE is supported, it'll be necessary to
3017 * work with hardware drivers directly.
3018 *
3019 * @note PCM channel arguments must not be locked by caller.
3020 *
3021 * @param wrch Pointer to opened playback channel (optional; may be NULL)
3022 * @param rdch " recording channel (optional; may be NULL)
3023 * @param policy Integer from [0:10]
3024 *
3025 * @retval 0 constant (for now)
3026 */
3027static int
3028dsp_oss_policy(struct pcm_channel *wrch, struct pcm_channel *rdch, int policy)
3029{
3030 int ret;
3031
3032 if (policy < CHN_POLICY_MIN || policy > CHN_POLICY_MAX)
3033 return (EIO);
3034
3035 /* Default: success */
3036 ret = 0;
3037
3038 if (rdch) {
3039 CHN_LOCK(rdch);
3040 ret = chn_setlatency(rdch, policy);
3041 CHN_UNLOCK(rdch);
3042 }
3043
3044 if (wrch && ret == 0) {
3045 CHN_LOCK(wrch);
3046 ret = chn_setlatency(wrch, policy);
3047 CHN_UNLOCK(wrch);
3048 }
3049
3050 if (ret)
3051 ret = EIO;
3052
3053 return (ret);
3054}
3055
3056/**
3057 * @brief Enable or disable "cooked" mode
3058 *
3059 * This is a handler for @c SNDCTL_DSP_COOKEDMODE. When in cooked mode, which
3060 * is the default, the sound system handles rate and format conversions
3061 * automatically (ex: user writing 11025Hz/8 bit/unsigned but card only
3062 * operates with 44100Hz/16bit/signed samples).
3063 *
3064 * Disabling cooked mode is intended for applications wanting to mmap()
3065 * a sound card's buffer space directly, bypassing the FreeBSD 2-stage
3066 * feeder architecture, presumably to gain as much control over audio
3067 * hardware as possible.
3068 *
3069 * See @c http://manuals.opensound.com/developer/SNDCTL_DSP_COOKEDMODE.html
3070 * for more details.
3071 *
3072 * @param wrch playback channel (optional; may be NULL)
3073 * @param rdch recording channel (optional; may be NULL)
3074 * @param enabled 0 = raw mode, 1 = cooked mode
3075 *
3076 * @retval EINVAL Operation not yet supported.
3077 */
3078static int
3079dsp_oss_cookedmode(struct pcm_channel *wrch, struct pcm_channel *rdch, int enabled)
3080{
3081
3082 /*
3083 * XXX I just don't get it. Why don't they call it
3084 * "BITPERFECT" ~ SNDCTL_DSP_BITPERFECT !?!?.
3085 * This is just plain so confusing, incoherent,
3086 * <insert any non-printable characters here>.
3087 */
3088 if (!(enabled == 1 || enabled == 0))
3089 return (EINVAL);
3090
3091 /*
3092 * I won't give in. I'm inverting its logic here and now.
3093 * Brag all you want, but "BITPERFECT" should be the better
3094 * term here.
3095 */
3096 enabled ^= 0x00000001;
3097
3098 if (wrch != NULL) {
3099 CHN_LOCK(wrch);
3100 wrch->flags &= ~CHN_F_BITPERFECT;
3101 wrch->flags |= (enabled != 0) ? CHN_F_BITPERFECT : 0x00000000;
3102 CHN_UNLOCK(wrch);
3103 }
3104
3105 if (rdch != NULL) {
3106 CHN_LOCK(rdch);
3107 rdch->flags &= ~CHN_F_BITPERFECT;
3108 rdch->flags |= (enabled != 0) ? CHN_F_BITPERFECT : 0x00000000;
3109 CHN_UNLOCK(rdch);
3110 }
3111
3112 return (0);
3113}
3114
3115/**
3116 * @brief Retrieve channel interleaving order
3117 *
3118 * This is the handler for @c SNDCTL_DSP_GET_CHNORDER.
3119 *
3120 * See @c http://manuals.opensound.com/developer/SNDCTL_DSP_GET_CHNORDER.html
3121 * for more details.
3122 *
3123 * @note As the ioctl definition is still under construction, FreeBSD
3124 * does not currently support SNDCTL_DSP_GET_CHNORDER.
3125 *
3126 * @param wrch playback channel (optional; may be NULL)
3127 * @param rdch recording channel (optional; may be NULL)
3128 * @param map channel map (result will be stored there)
3129 *
3130 * @retval EINVAL Operation not yet supported.
3131 */
3132static int
3133dsp_oss_getchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map)
3134{
3135 struct pcm_channel *ch;
3136 int ret;
3137
3138 ch = (wrch != NULL) ? wrch : rdch;
3139 if (ch != NULL) {
3140 CHN_LOCK(ch);
3141 ret = chn_oss_getorder(ch, map);
3142 CHN_UNLOCK(ch);
3143 } else
3144 ret = EINVAL;
3145
3146 return (ret);
3147}
3148
3149/**
3150 * @brief Specify channel interleaving order
3151 *
3152 * This is the handler for @c SNDCTL_DSP_SET_CHNORDER.
3153 *
3154 * @note As the ioctl definition is still under construction, FreeBSD
3155 * does not currently support @c SNDCTL_DSP_SET_CHNORDER.
3156 *
3157 * @param wrch playback channel (optional; may be NULL)
3158 * @param rdch recording channel (optional; may be NULL)
3159 * @param map channel map
3160 *
3161 * @retval EINVAL Operation not yet supported.
3162 */
3163static int
3164dsp_oss_setchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map)
3165{
3166 int ret;
3167
3168 ret = 0;
3169
3170 if (wrch != NULL) {
3171 CHN_LOCK(wrch);
3172 ret = chn_oss_setorder(wrch, map);
3173 CHN_UNLOCK(wrch);
3174 }
3175
3176 if (ret == 0 && rdch != NULL) {
3177 CHN_LOCK(rdch);
3178 ret = chn_oss_setorder(rdch, map);
3179 CHN_UNLOCK(rdch);
3180 }
3181
3182 return (ret);
3183}
3184
3185static int
3186dsp_oss_getchannelmask(struct pcm_channel *wrch, struct pcm_channel *rdch,
3187 int *mask)
3188{
3189 struct pcm_channel *ch;
3190 uint32_t chnmask;
3191 int ret;
3192
3193 chnmask = 0;
3194 ch = (wrch != NULL) ? wrch : rdch;
3195
3196 if (ch != NULL) {
3197 CHN_LOCK(ch);
3198 ret = chn_oss_getmask(ch, &chnmask);
3199 CHN_UNLOCK(ch);
3200 } else
3201 ret = EINVAL;
3202
3203 if (ret == 0)
3204 *mask = chnmask;
3205
3206 return (ret);
3207}
3208
3209#ifdef OSSV4_EXPERIMENT
3210/**
3211 * @brief Retrieve an audio device's label
3212 *
3213 * This is a handler for the @c SNDCTL_GETLABEL ioctl.
3214 *
3215 * See @c http://manuals.opensound.com/developer/SNDCTL_GETLABEL.html
3216 * for more details.
3217 *
3218 * From Hannu@4Front: "For example ossxmix (just like some HW mixer
3219 * consoles) can show variable "labels" for certain controls. By default
3220 * the application name (say quake) is shown as the label but
3221 * applications may change the labels themselves."
3222 *
3223 * @note As the ioctl definition is still under construction, FreeBSD
3224 * does not currently support @c SNDCTL_GETLABEL.
3225 *
3226 * @param wrch playback channel (optional; may be NULL)
3227 * @param rdch recording channel (optional; may be NULL)
3228 * @param label label gets copied here
3229 *
3230 * @retval EINVAL Operation not yet supported.
3231 */
3232static int
3233dsp_oss_getlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label)
3234{
3235 return (EINVAL);
3236}
3237
3238/**
3239 * @brief Specify an audio device's label
3240 *
3241 * This is a handler for the @c SNDCTL_SETLABEL ioctl. Please see the
3242 * comments for @c dsp_oss_getlabel immediately above.
3243 *
3244 * See @c http://manuals.opensound.com/developer/SNDCTL_GETLABEL.html
3245 * for more details.
3246 *
3247 * @note As the ioctl definition is still under construction, FreeBSD
3248 * does not currently support SNDCTL_SETLABEL.
3249 *
3250 * @param wrch playback channel (optional; may be NULL)
3251 * @param rdch recording channel (optional; may be NULL)
3252 * @param label label gets copied from here
3253 *
3254 * @retval EINVAL Operation not yet supported.
3255 */
3256static int
3257dsp_oss_setlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label)
3258{
3259 return (EINVAL);
3260}
3261
3262/**
3263 * @brief Retrieve name of currently played song
3264 *
3265 * This is a handler for the @c SNDCTL_GETSONG ioctl. Audio players could
3266 * tell the system the name of the currently playing song, which would be
3267 * visible in @c /dev/sndstat.
3268 *
3269 * See @c http://manuals.opensound.com/developer/SNDCTL_GETSONG.html
3270 * for more details.
3271 *
3272 * @note As the ioctl definition is still under construction, FreeBSD
3273 * does not currently support SNDCTL_GETSONG.
3274 *
3275 * @param wrch playback channel (optional; may be NULL)
3276 * @param rdch recording channel (optional; may be NULL)
3277 * @param song song name gets copied here
3278 *
3279 * @retval EINVAL Operation not yet supported.
3280 */
3281static int
3282dsp_oss_getsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song)
3283{
3284 return (EINVAL);
3285}
3286
3287/**
3288 * @brief Retrieve name of currently played song
3289 *
3290 * This is a handler for the @c SNDCTL_SETSONG ioctl. Audio players could
3291 * tell the system the name of the currently playing song, which would be
3292 * visible in @c /dev/sndstat.
3293 *
3294 * See @c http://manuals.opensound.com/developer/SNDCTL_SETSONG.html
3295 * for more details.
3296 *
3297 * @note As the ioctl definition is still under construction, FreeBSD
3298 * does not currently support SNDCTL_SETSONG.
3299 *
3300 * @param wrch playback channel (optional; may be NULL)
3301 * @param rdch recording channel (optional; may be NULL)
3302 * @param song song name gets copied from here
3303 *
3304 * @retval EINVAL Operation not yet supported.
3305 */
3306static int
3307dsp_oss_setsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song)
3308{
3309 return (EINVAL);
3310}
3311
3312/**
3313 * @brief Rename a device
3314 *
3315 * This is a handler for the @c SNDCTL_SETNAME ioctl.
3316 *
3317 * See @c http://manuals.opensound.com/developer/SNDCTL_SETNAME.html for
3318 * more details.
3319 *
3320 * From Hannu@4Front: "This call is used to change the device name
3321 * reported in /dev/sndstat and ossinfo. So instead of using some generic
3322 * 'OSS loopback audio (MIDI) driver' the device may be given a meaningfull
3323 * name depending on the current context (for example 'OSS virtual wave table
3324 * synth' or 'VoIP link to London')."
3325 *
3326 * @note As the ioctl definition is still under construction, FreeBSD
3327 * does not currently support SNDCTL_SETNAME.
3328 *
3329 * @param wrch playback channel (optional; may be NULL)
3330 * @param rdch recording channel (optional; may be NULL)
3331 * @param name new device name gets copied from here
3332 *
3333 * @retval EINVAL Operation not yet supported.
3334 */
3335static int
3336dsp_oss_setname(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *name)
3337{
3338 return (EINVAL);
3339}
3340#endif /* !OSSV4_EXPERIMENT */
| 2184{
2185 struct snddev_info *d;
2186 struct pcm_channel *wrch, *rdch, *c;
2187
2188 /*
2189 * Reject PROT_EXEC by default. It just doesn't makes sense.
2190 * Unfortunately, we have to give up this one due to linux_mmap
2191 * changes.
2192 *
2193 * http://lists.freebsd.org/pipermail/freebsd-emulation/2007-June/003698.html
2194 *
2195 */
2196#ifdef SV_ABI_LINUX
2197 if ((nprot & PROT_EXEC) && (dsp_mmap_allow_prot_exec < 0 ||
2198 (dsp_mmap_allow_prot_exec == 0 &&
2199 SV_CURPROC_ABI() != SV_ABI_LINUX)))
2200#else
2201 if ((nprot & PROT_EXEC) && dsp_mmap_allow_prot_exec < 1)
2202#endif
2203 return (-1);
2204
2205 d = dsp_get_info(i_dev);
2206 if (!DSP_REGISTERED(d, i_dev))
2207 return (-1);
2208
2209 PCM_GIANT_ENTER(d);
2210
2211 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
2212
2213 /*
2214 * XXX The linux api uses the nprot to select read/write buffer
2215 * our vm system doesn't allow this, so force write buffer.
2216 *
2217 * This is just a quack to fool full-duplex mmap, so that at
2218 * least playback _or_ recording works. If you really got the
2219 * urge to make _both_ work at the same time, avoid O_RDWR.
2220 * Just open each direction separately and mmap() it.
2221 *
2222 * Failure is not an option due to INVARIANTS check within
2223 * device_pager.c, which means, we have to give up one over
2224 * another.
2225 */
2226 c = (wrch != NULL) ? wrch : rdch;
2227
2228 if (c == NULL || (c->flags & CHN_F_MMAP_INVALID) ||
2229 offset >= sndbuf_getsize(c->bufsoft) ||
2230 (wrch != NULL && (wrch->flags & CHN_F_MMAP_INVALID)) ||
2231 (rdch != NULL && (rdch->flags & CHN_F_MMAP_INVALID))) {
2232 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
2233 PCM_GIANT_EXIT(d);
2234 return (-1);
2235 }
2236
2237 /* XXX full-duplex quack. */
2238 if (wrch != NULL)
2239 wrch->flags |= CHN_F_MMAP;
2240 if (rdch != NULL)
2241 rdch->flags |= CHN_F_MMAP;
2242
2243 *paddr = vtophys(sndbuf_getbufofs(c->bufsoft, offset));
2244 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
2245
2246 PCM_GIANT_LEAVE(d);
2247
2248 return (0);
2249}
2250
2251/* So much for dev_stdclone() */
2252static int
2253dsp_stdclone(char *name, char *namep, char *sep, int use_sep, int *u, int *c)
2254{
2255 size_t len;
2256
2257 len = strlen(namep);
2258
2259 if (bcmp(name, namep, len) != 0)
2260 return (ENODEV);
2261
2262 name += len;
2263
2264 if (isdigit(*name) == 0)
2265 return (ENODEV);
2266
2267 len = strlen(sep);
2268
2269 if (*name == '0' && !(name[1] == '\0' || bcmp(name + 1, sep, len) == 0))
2270 return (ENODEV);
2271
2272 for (*u = 0; isdigit(*name) != 0; name++) {
2273 *u *= 10;
2274 *u += *name - '0';
2275 if (*u > dsp_umax)
2276 return (ENODEV);
2277 }
2278
2279 if (*name == '\0')
2280 return ((use_sep == 0) ? 0 : ENODEV);
2281
2282 if (bcmp(name, sep, len) != 0 || isdigit(name[len]) == 0)
2283 return (ENODEV);
2284
2285 name += len;
2286
2287 if (*name == '0' && name[1] != '\0')
2288 return (ENODEV);
2289
2290 for (*c = 0; isdigit(*name) != 0; name++) {
2291 *c *= 10;
2292 *c += *name - '0';
2293 if (*c > dsp_cmax)
2294 return (ENODEV);
2295 }
2296
2297 if (*name != '\0')
2298 return (ENODEV);
2299
2300 return (0);
2301}
2302
2303static void
2304dsp_clone(void *arg,
2305#if __FreeBSD_version >= 600034
2306 struct ucred *cred,
2307#endif
2308 char *name, int namelen, struct cdev **dev)
2309{
2310 struct snddev_info *d;
2311 struct snd_clone_entry *ce;
2312 struct pcm_channel *c;
2313 int i, unit, udcmask, cunit, devtype, devhw, devcmax, tumax;
2314 char *devname, *devcmp, *devsep;
2315
2316 KASSERT(dsp_umax >= 0 && dsp_cmax >= 0, ("Uninitialized unit!"));
2317
2318 if (*dev != NULL)
2319 return;
2320
2321 unit = -1;
2322 cunit = -1;
2323 devtype = -1;
2324 devhw = 0;
2325 devcmax = -1;
2326 tumax = -1;
2327 devname = NULL;
2328 devsep = NULL;
2329
2330 for (i = 0; unit == -1 &&
2331 i < (sizeof(dsp_cdevs) / sizeof(dsp_cdevs[0])); i++) {
2332 devtype = dsp_cdevs[i].type;
2333 devcmp = dsp_cdevs[i].name;
2334 devsep = dsp_cdevs[i].sep;
2335 devname = dsp_cdevs[i].alias;
2336 if (devname == NULL)
2337 devname = devcmp;
2338 devhw = dsp_cdevs[i].hw;
2339 devcmax = dsp_cdevs[i].max - 1;
2340 if (strcmp(name, devcmp) == 0)
2341 unit = snd_unit;
2342 else if (dsp_stdclone(name, devcmp, devsep,
2343 dsp_cdevs[i].use_sep, &unit, &cunit) != 0) {
2344 unit = -1;
2345 cunit = -1;
2346 }
2347 }
2348
2349 d = devclass_get_softc(pcm_devclass, unit);
2350 if (!PCM_REGISTERED(d) || d->clones == NULL)
2351 return;
2352
2353 /* XXX Need Giant magic entry ??? */
2354
2355 PCM_LOCK(d);
2356 if (snd_clone_disabled(d->clones)) {
2357 PCM_UNLOCK(d);
2358 return;
2359 }
2360
2361 PCM_WAIT(d);
2362 PCM_ACQUIRE(d);
2363 PCM_UNLOCK(d);
2364
2365 udcmask = snd_u2unit(unit) | snd_d2unit(devtype);
2366
2367 if (devhw != 0) {
2368 KASSERT(devcmax <= dsp_cmax,
2369 ("overflow: devcmax=%d, dsp_cmax=%d", devcmax, dsp_cmax));
2370 if (cunit > devcmax) {
2371 PCM_RELEASE_QUICK(d);
2372 return;
2373 }
2374 udcmask |= snd_c2unit(cunit);
2375 CHN_FOREACH(c, d, channels.pcm) {
2376 CHN_LOCK(c);
2377 if (c->unit != udcmask) {
2378 CHN_UNLOCK(c);
2379 continue;
2380 }
2381 CHN_UNLOCK(c);
2382 udcmask &= ~snd_c2unit(cunit);
2383 /*
2384 * Temporarily increase clone maxunit to overcome
2385 * vchan flexibility.
2386 *
2387 * # sysctl dev.pcm.0.play.vchans=256
2388 * dev.pcm.0.play.vchans: 1 -> 256
2389 * # cat /dev/zero > /dev/dsp0.vp255 &
2390 * [1] 17296
2391 * # sysctl dev.pcm.0.play.vchans=0
2392 * dev.pcm.0.play.vchans: 256 -> 1
2393 * # fg
2394 * [1] + running cat /dev/zero > /dev/dsp0.vp255
2395 * ^C
2396 * # cat /dev/zero > /dev/dsp0.vp255
2397 * zsh: operation not supported: /dev/dsp0.vp255
2398 */
2399 tumax = snd_clone_getmaxunit(d->clones);
2400 if (cunit > tumax)
2401 snd_clone_setmaxunit(d->clones, cunit);
2402 else
2403 tumax = -1;
2404 goto dsp_clone_alloc;
2405 }
2406 /*
2407 * Ok, so we're requesting unallocated vchan, but still
2408 * within maximum vchan limit.
2409 */
2410 if (((devtype == SND_DEV_DSPHW_VPLAY && d->pvchancount > 0) ||
2411 (devtype == SND_DEV_DSPHW_VREC && d->rvchancount > 0)) &&
2412 cunit < snd_maxautovchans) {
2413 udcmask &= ~snd_c2unit(cunit);
2414 tumax = snd_clone_getmaxunit(d->clones);
2415 if (cunit > tumax)
2416 snd_clone_setmaxunit(d->clones, cunit);
2417 else
2418 tumax = -1;
2419 goto dsp_clone_alloc;
2420 }
2421 PCM_RELEASE_QUICK(d);
2422 return;
2423 }
2424
2425dsp_clone_alloc:
2426 ce = snd_clone_alloc(d->clones, dev, &cunit, udcmask);
2427 if (tumax != -1)
2428 snd_clone_setmaxunit(d->clones, tumax);
2429 if (ce != NULL) {
2430 udcmask |= snd_c2unit(cunit);
2431 *dev = make_dev(&dsp_cdevsw, PCMMINOR(udcmask),
2432 UID_ROOT, GID_WHEEL, 0666, "%s%d%s%d",
2433 devname, unit, devsep, cunit);
2434 snd_clone_register(ce, *dev);
2435 }
2436
2437 PCM_RELEASE_QUICK(d);
2438
2439 if (*dev != NULL)
2440 dev_ref(*dev);
2441}
2442
2443static void
2444dsp_sysinit(void *p)
2445{
2446 if (dsp_ehtag != NULL)
2447 return;
2448 /* initialize unit numbering */
2449 snd_unit_init();
2450 dsp_umax = PCMMAXUNIT;
2451 dsp_cmax = PCMMAXCHAN;
2452 dsp_ehtag = EVENTHANDLER_REGISTER(dev_clone, dsp_clone, 0, 1000);
2453}
2454
2455static void
2456dsp_sysuninit(void *p)
2457{
2458 if (dsp_ehtag == NULL)
2459 return;
2460 EVENTHANDLER_DEREGISTER(dev_clone, dsp_ehtag);
2461 dsp_ehtag = NULL;
2462}
2463
2464SYSINIT(dsp_sysinit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysinit, NULL);
2465SYSUNINIT(dsp_sysuninit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysuninit, NULL);
2466
2467char *
2468dsp_unit2name(char *buf, size_t len, int unit)
2469{
2470 int i, dtype;
2471
2472 KASSERT(buf != NULL && len != 0,
2473 ("bogus buf=%p len=%ju", buf, (uintmax_t)len));
2474
2475 dtype = snd_unit2d(unit);
2476
2477 for (i = 0; i < (sizeof(dsp_cdevs) / sizeof(dsp_cdevs[0])); i++) {
2478 if (dtype != dsp_cdevs[i].type || dsp_cdevs[i].alias != NULL)
2479 continue;
2480 snprintf(buf, len, "%s%d%s%d", dsp_cdevs[i].name,
2481 snd_unit2u(unit), dsp_cdevs[i].sep, snd_unit2c(unit));
2482 return (buf);
2483 }
2484
2485 return (NULL);
2486}
2487
2488/**
2489 * @brief Handler for SNDCTL_AUDIOINFO.
2490 *
2491 * Gathers information about the audio device specified in ai->dev. If
2492 * ai->dev == -1, then this function gathers information about the current
2493 * device. If the call comes in on a non-audio device and ai->dev == -1,
2494 * return EINVAL.
2495 *
2496 * This routine is supposed to go practically straight to the hardware,
2497 * getting capabilities directly from the sound card driver, side-stepping
2498 * the intermediate channel interface.
2499 *
2500 * Note, however, that the usefulness of this command is significantly
2501 * decreased when requesting info about any device other than the one serving
2502 * the request. While each snddev_channel refers to a specific device node,
2503 * the converse is *not* true. Currently, when a sound device node is opened,
2504 * the sound subsystem scans for an available audio channel (or channels, if
2505 * opened in read+write) and then assigns them to the si_drv[12] private
2506 * data fields. As a result, any information returned linking a channel to
2507 * a specific character device isn't necessarily accurate.
2508 *
2509 * @note
2510 * Calling threads must not hold any snddev_info or pcm_channel locks.
2511 *
2512 * @param dev device on which the ioctl was issued
2513 * @param ai ioctl request data container
2514 *
2515 * @retval 0 success
2516 * @retval EINVAL ai->dev specifies an invalid device
2517 *
2518 * @todo Verify correctness of Doxygen tags. ;)
2519 */
2520int
2521dsp_oss_audioinfo(struct cdev *i_dev, oss_audioinfo *ai)
2522{
2523 struct pcmchan_caps *caps;
2524 struct pcm_channel *ch;
2525 struct snddev_info *d;
2526 uint32_t fmts;
2527 int i, nchan, *rates, minch, maxch;
2528 char *devname, buf[CHN_NAMELEN];
2529
2530 /*
2531 * If probing the device that received the ioctl, make sure it's a
2532 * DSP device. (Users may use this ioctl with /dev/mixer and
2533 * /dev/midi.)
2534 */
2535 if (ai->dev == -1 && i_dev->si_devsw != &dsp_cdevsw)
2536 return (EINVAL);
2537
2538 ch = NULL;
2539 devname = NULL;
2540 nchan = 0;
2541 bzero(buf, sizeof(buf));
2542
2543 /*
2544 * Search for the requested audio device (channel). Start by
2545 * iterating over pcm devices.
2546 */
2547 for (i = 0; pcm_devclass != NULL &&
2548 i < devclass_get_maxunit(pcm_devclass); i++) {
2549 d = devclass_get_softc(pcm_devclass, i);
2550 if (!PCM_REGISTERED(d))
2551 continue;
2552
2553 /* XXX Need Giant magic entry ??? */
2554
2555 /* See the note in function docblock */
2556 PCM_UNLOCKASSERT(d);
2557 PCM_LOCK(d);
2558
2559 CHN_FOREACH(ch, d, channels.pcm) {
2560 CHN_UNLOCKASSERT(ch);
2561 CHN_LOCK(ch);
2562 if (ai->dev == -1) {
2563 if (DSP_REGISTERED(d, i_dev) &&
2564 (ch == PCM_RDCH(i_dev) || /* record ch */
2565 ch == PCM_WRCH(i_dev))) { /* playback ch */
2566 devname = dsp_unit2name(buf,
2567 sizeof(buf), ch->unit);
2568 }
2569 } else if (ai->dev == nchan) {
2570 devname = dsp_unit2name(buf, sizeof(buf),
2571 ch->unit);
2572 }
2573 if (devname != NULL)
2574 break;
2575 CHN_UNLOCK(ch);
2576 ++nchan;
2577 }
2578
2579 if (devname != NULL) {
2580 /*
2581 * At this point, the following synchronization stuff
2582 * has happened:
2583 * - a specific PCM device is locked.
2584 * - a specific audio channel has been locked, so be
2585 * sure to unlock when exiting;
2586 */
2587
2588 caps = chn_getcaps(ch);
2589
2590 /*
2591 * With all handles collected, zero out the user's
2592 * container and begin filling in its fields.
2593 */
2594 bzero((void *)ai, sizeof(oss_audioinfo));
2595
2596 ai->dev = nchan;
2597 strlcpy(ai->name, ch->name, sizeof(ai->name));
2598
2599 if ((ch->flags & CHN_F_BUSY) == 0)
2600 ai->busy = 0;
2601 else
2602 ai->busy = (ch->direction == PCMDIR_PLAY) ? OPEN_WRITE : OPEN_READ;
2603
2604 /**
2605 * @note
2606 * @c cmd - OSSv4 docs: "Only supported under Linux at
2607 * this moment." Cop-out, I know, but I'll save
2608 * running around in the process table for later.
2609 * Is there a risk of leaking information?
2610 */
2611 ai->pid = ch->pid;
2612
2613 /*
2614 * These flags stolen from SNDCTL_DSP_GETCAPS handler.
2615 * Note, however, that a single channel operates in
2616 * only one direction, so PCM_CAP_DUPLEX is out.
2617 */
2618 /**
2619 * @todo @c SNDCTL_AUDIOINFO::caps - Make drivers keep
2620 * these in pcmchan::caps?
2621 */
2622 ai->caps = PCM_CAP_REALTIME | PCM_CAP_MMAP | PCM_CAP_TRIGGER |
2623 ((ch->direction == PCMDIR_PLAY) ? PCM_CAP_OUTPUT : PCM_CAP_INPUT);
2624
2625 /*
2626 * Collect formats supported @b natively by the
2627 * device. Also determine min/max channels. (I.e.,
2628 * mono, stereo, or both?)
2629 *
2630 * If any channel is stereo, maxch = 2;
2631 * if all channels are stereo, minch = 2, too;
2632 * if any channel is mono, minch = 1;
2633 * and if all channels are mono, maxch = 1.
2634 */
2635 minch = 0;
2636 maxch = 0;
2637 fmts = 0;
2638 for (i = 0; caps->fmtlist[i]; i++) {
2639 fmts |= caps->fmtlist[i];
2640 if (AFMT_CHANNEL(caps->fmtlist[i]) > 1) {
2641 minch = (minch == 0) ? 2 : minch;
2642 maxch = 2;
2643 } else {
2644 minch = 1;
2645 maxch = (maxch == 0) ? 1 : maxch;
2646 }
2647 }
2648
2649 if (ch->direction == PCMDIR_PLAY)
2650 ai->oformats = fmts;
2651 else
2652 ai->iformats = fmts;
2653
2654 /**
2655 * @note
2656 * @c magic - OSSv4 docs: "Reserved for internal use
2657 * by OSS."
2658 *
2659 * @par
2660 * @c card_number - OSSv4 docs: "Number of the sound
2661 * card where this device belongs or -1 if this
2662 * information is not available. Applications
2663 * should normally not use this field for any
2664 * purpose."
2665 */
2666 ai->card_number = -1;
2667 /**
2668 * @todo @c song_name - depends first on
2669 * SNDCTL_[GS]ETSONG @todo @c label - depends
2670 * on SNDCTL_[GS]ETLABEL
2671 * @todo @c port_number - routing information?
2672 */
2673 ai->port_number = -1;
2674 ai->mixer_dev = (d->mixer_dev != NULL) ? PCMUNIT(d->mixer_dev) : -1;
2675 /**
2676 * @note
2677 * @c real_device - OSSv4 docs: "Obsolete."
2678 */
2679 ai->real_device = -1;
2680 strlcpy(ai->devnode, "/dev/", sizeof(ai->devnode));
2681 strlcat(ai->devnode, devname, sizeof(ai->devnode));
2682 ai->enabled = device_is_attached(d->dev) ? 1 : 0;
2683 /**
2684 * @note
2685 * @c flags - OSSv4 docs: "Reserved for future use."
2686 *
2687 * @note
2688 * @c binding - OSSv4 docs: "Reserved for future use."
2689 *
2690 * @todo @c handle - haven't decided how to generate
2691 * this yet; bus, vendor, device IDs?
2692 */
2693 ai->min_rate = caps->minspeed;
2694 ai->max_rate = caps->maxspeed;
2695
2696 ai->min_channels = minch;
2697 ai->max_channels = maxch;
2698
2699 ai->nrates = chn_getrates(ch, &rates);
2700 if (ai->nrates > OSS_MAX_SAMPLE_RATES)
2701 ai->nrates = OSS_MAX_SAMPLE_RATES;
2702
2703 for (i = 0; i < ai->nrates; i++)
2704 ai->rates[i] = rates[i];
2705
2706 ai->next_play_engine = 0;
2707 ai->next_rec_engine = 0;
2708
2709 CHN_UNLOCK(ch);
2710 }
2711
2712 PCM_UNLOCK(d);
2713
2714 if (devname != NULL)
2715 return (0);
2716 }
2717
2718 /* Exhausted the search -- nothing is locked, so return. */
2719 return (EINVAL);
2720}
2721
2722/**
2723 * @brief Assigns a PCM channel to a sync group.
2724 *
2725 * Sync groups are used to enable audio operations on multiple devices
2726 * simultaneously. They may be used with any number of devices and may
2727 * span across applications. Devices are added to groups with
2728 * the SNDCTL_DSP_SYNCGROUP ioctl, and operations are triggered with the
2729 * SNDCTL_DSP_SYNCSTART ioctl.
2730 *
2731 * If the @c id field of the @c group parameter is set to zero, then a new
2732 * sync group is created. Otherwise, wrch and rdch (if set) are added to
2733 * the group specified.
2734 *
2735 * @todo As far as memory allocation, should we assume that things are
2736 * okay and allocate with M_WAITOK before acquiring channel locks,
2737 * freeing later if not?
2738 *
2739 * @param wrch output channel associated w/ device (if any)
2740 * @param rdch input channel associated w/ device (if any)
2741 * @param group Sync group parameters
2742 *
2743 * @retval 0 success
2744 * @retval non-zero error to be propagated upstream
2745 */
2746static int
2747dsp_oss_syncgroup(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_syncgroup *group)
2748{
2749 struct pcmchan_syncmember *smrd, *smwr;
2750 struct pcmchan_syncgroup *sg;
2751 int ret, sg_ids[3];
2752
2753 smrd = NULL;
2754 smwr = NULL;
2755 sg = NULL;
2756 ret = 0;
2757
2758 /*
2759 * Free_unr() may sleep, so store released syncgroup IDs until after
2760 * all locks are released.
2761 */
2762 sg_ids[0] = sg_ids[1] = sg_ids[2] = 0;
2763
2764 PCM_SG_LOCK();
2765
2766 /*
2767 * - Insert channel(s) into group's member list.
2768 * - Set CHN_F_NOTRIGGER on channel(s).
2769 * - Stop channel(s).
2770 */
2771
2772 /*
2773 * If device's channels are already mapped to a group, unmap them.
2774 */
2775 if (wrch) {
2776 CHN_LOCK(wrch);
2777 sg_ids[0] = chn_syncdestroy(wrch);
2778 }
2779
2780 if (rdch) {
2781 CHN_LOCK(rdch);
2782 sg_ids[1] = chn_syncdestroy(rdch);
2783 }
2784
2785 /*
2786 * Verify that mode matches character device properites.
2787 * - Bail if PCM_ENABLE_OUTPUT && wrch == NULL.
2788 * - Bail if PCM_ENABLE_INPUT && rdch == NULL.
2789 */
2790 if (((wrch == NULL) && (group->mode & PCM_ENABLE_OUTPUT)) ||
2791 ((rdch == NULL) && (group->mode & PCM_ENABLE_INPUT))) {
2792 ret = EINVAL;
2793 goto out;
2794 }
2795
2796 /*
2797 * An id of zero indicates the user wants to create a new
2798 * syncgroup.
2799 */
2800 if (group->id == 0) {
2801 sg = (struct pcmchan_syncgroup *)malloc(sizeof(*sg), M_DEVBUF, M_NOWAIT);
2802 if (sg != NULL) {
2803 SLIST_INIT(&sg->members);
2804 sg->id = alloc_unr(pcmsg_unrhdr);
2805
2806 group->id = sg->id;
2807 SLIST_INSERT_HEAD(&snd_pcm_syncgroups, sg, link);
2808 } else
2809 ret = ENOMEM;
2810 } else {
2811 SLIST_FOREACH(sg, &snd_pcm_syncgroups, link) {
2812 if (sg->id == group->id)
2813 break;
2814 }
2815 if (sg == NULL)
2816 ret = EINVAL;
2817 }
2818
2819 /* Couldn't create or find a syncgroup. Fail. */
2820 if (sg == NULL)
2821 goto out;
2822
2823 /*
2824 * Allocate a syncmember, assign it and a channel together, and
2825 * insert into syncgroup.
2826 */
2827 if (group->mode & PCM_ENABLE_INPUT) {
2828 smrd = (struct pcmchan_syncmember *)malloc(sizeof(*smrd), M_DEVBUF, M_NOWAIT);
2829 if (smrd == NULL) {
2830 ret = ENOMEM;
2831 goto out;
2832 }
2833
2834 SLIST_INSERT_HEAD(&sg->members, smrd, link);
2835 smrd->parent = sg;
2836 smrd->ch = rdch;
2837
2838 chn_abort(rdch);
2839 rdch->flags |= CHN_F_NOTRIGGER;
2840 rdch->sm = smrd;
2841 }
2842
2843 if (group->mode & PCM_ENABLE_OUTPUT) {
2844 smwr = (struct pcmchan_syncmember *)malloc(sizeof(*smwr), M_DEVBUF, M_NOWAIT);
2845 if (smwr == NULL) {
2846 ret = ENOMEM;
2847 goto out;
2848 }
2849
2850 SLIST_INSERT_HEAD(&sg->members, smwr, link);
2851 smwr->parent = sg;
2852 smwr->ch = wrch;
2853
2854 chn_abort(wrch);
2855 wrch->flags |= CHN_F_NOTRIGGER;
2856 wrch->sm = smwr;
2857 }
2858
2859
2860out:
2861 if (ret != 0) {
2862 if (smrd != NULL)
2863 free(smrd, M_DEVBUF);
2864 if ((sg != NULL) && SLIST_EMPTY(&sg->members)) {
2865 sg_ids[2] = sg->id;
2866 SLIST_REMOVE(&snd_pcm_syncgroups, sg, pcmchan_syncgroup, link);
2867 free(sg, M_DEVBUF);
2868 }
2869
2870 if (wrch)
2871 wrch->sm = NULL;
2872 if (rdch)
2873 rdch->sm = NULL;
2874 }
2875
2876 if (wrch)
2877 CHN_UNLOCK(wrch);
2878 if (rdch)
2879 CHN_UNLOCK(rdch);
2880
2881 PCM_SG_UNLOCK();
2882
2883 if (sg_ids[0])
2884 free_unr(pcmsg_unrhdr, sg_ids[0]);
2885 if (sg_ids[1])
2886 free_unr(pcmsg_unrhdr, sg_ids[1]);
2887 if (sg_ids[2])
2888 free_unr(pcmsg_unrhdr, sg_ids[2]);
2889
2890 return (ret);
2891}
2892
2893/**
2894 * @brief Launch a sync group into action
2895 *
2896 * Sync groups are established via SNDCTL_DSP_SYNCGROUP. This function
2897 * iterates over all members, triggering them along the way.
2898 *
2899 * @note Caller must not hold any channel locks.
2900 *
2901 * @param sg_id sync group identifier
2902 *
2903 * @retval 0 success
2904 * @retval non-zero error worthy of propagating upstream to user
2905 */
2906static int
2907dsp_oss_syncstart(int sg_id)
2908{
2909 struct pcmchan_syncmember *sm, *sm_tmp;
2910 struct pcmchan_syncgroup *sg;
2911 struct pcm_channel *c;
2912 int ret, needlocks;
2913
2914 /* Get the synclists lock */
2915 PCM_SG_LOCK();
2916
2917 do {
2918 ret = 0;
2919 needlocks = 0;
2920
2921 /* Search for syncgroup by ID */
2922 SLIST_FOREACH(sg, &snd_pcm_syncgroups, link) {
2923 if (sg->id == sg_id)
2924 break;
2925 }
2926
2927 /* Return EINVAL if not found */
2928 if (sg == NULL) {
2929 ret = EINVAL;
2930 break;
2931 }
2932
2933 /* Any removals resulting in an empty group should've handled this */
2934 KASSERT(!SLIST_EMPTY(&sg->members), ("found empty syncgroup"));
2935
2936 /*
2937 * Attempt to lock all member channels - if any are already
2938 * locked, unlock those acquired, sleep for a bit, and try
2939 * again.
2940 */
2941 SLIST_FOREACH(sm, &sg->members, link) {
2942 if (CHN_TRYLOCK(sm->ch) == 0) {
2943 int timo = hz * 5/1000;
2944 if (timo < 1)
2945 timo = 1;
2946
2947 /* Release all locked channels so far, retry */
2948 SLIST_FOREACH(sm_tmp, &sg->members, link) {
2949 /* sm is the member already locked */
2950 if (sm == sm_tmp)
2951 break;
2952 CHN_UNLOCK(sm_tmp->ch);
2953 }
2954
2955 /** @todo Is PRIBIO correct/ */
2956 ret = msleep(sm, &snd_pcm_syncgroups_mtx,
2957 PRIBIO | PCATCH, "pcmsg", timo);
2958 if (ret == EINTR || ret == ERESTART)
2959 break;
2960
2961 needlocks = 1;
2962 ret = 0; /* Assumes ret == EAGAIN... */
2963 }
2964 }
2965 } while (needlocks && ret == 0);
2966
2967 /* Proceed only if no errors encountered. */
2968 if (ret == 0) {
2969 /* Launch channels */
2970 while ((sm = SLIST_FIRST(&sg->members)) != NULL) {
2971 SLIST_REMOVE_HEAD(&sg->members, link);
2972
2973 c = sm->ch;
2974 c->sm = NULL;
2975 chn_start(c, 1);
2976 c->flags &= ~CHN_F_NOTRIGGER;
2977 CHN_UNLOCK(c);
2978
2979 free(sm, M_DEVBUF);
2980 }
2981
2982 SLIST_REMOVE(&snd_pcm_syncgroups, sg, pcmchan_syncgroup, link);
2983 free(sg, M_DEVBUF);
2984 }
2985
2986 PCM_SG_UNLOCK();
2987
2988 /*
2989 * Free_unr() may sleep, so be sure to give up the syncgroup lock
2990 * first.
2991 */
2992 if (ret == 0)
2993 free_unr(pcmsg_unrhdr, sg_id);
2994
2995 return (ret);
2996}
2997
2998/**
2999 * @brief Handler for SNDCTL_DSP_POLICY
3000 *
3001 * The SNDCTL_DSP_POLICY ioctl is a simpler interface to control fragment
3002 * size and count like with SNDCTL_DSP_SETFRAGMENT. Instead of the user
3003 * specifying those two parameters, s/he simply selects a number from 0..10
3004 * which corresponds to a buffer size. Smaller numbers request smaller
3005 * buffers with lower latencies (at greater overhead from more frequent
3006 * interrupts), while greater numbers behave in the opposite manner.
3007 *
3008 * The 4Front spec states that a value of 5 should be the default. However,
3009 * this implementation deviates slightly by using a linear scale without
3010 * consulting drivers. I.e., even though drivers may have different default
3011 * buffer sizes, a policy argument of 5 will have the same result across
3012 * all drivers.
3013 *
3014 * See http://manuals.opensound.com/developer/SNDCTL_DSP_POLICY.html for
3015 * more information.
3016 *
3017 * @todo When SNDCTL_DSP_COOKEDMODE is supported, it'll be necessary to
3018 * work with hardware drivers directly.
3019 *
3020 * @note PCM channel arguments must not be locked by caller.
3021 *
3022 * @param wrch Pointer to opened playback channel (optional; may be NULL)
3023 * @param rdch " recording channel (optional; may be NULL)
3024 * @param policy Integer from [0:10]
3025 *
3026 * @retval 0 constant (for now)
3027 */
3028static int
3029dsp_oss_policy(struct pcm_channel *wrch, struct pcm_channel *rdch, int policy)
3030{
3031 int ret;
3032
3033 if (policy < CHN_POLICY_MIN || policy > CHN_POLICY_MAX)
3034 return (EIO);
3035
3036 /* Default: success */
3037 ret = 0;
3038
3039 if (rdch) {
3040 CHN_LOCK(rdch);
3041 ret = chn_setlatency(rdch, policy);
3042 CHN_UNLOCK(rdch);
3043 }
3044
3045 if (wrch && ret == 0) {
3046 CHN_LOCK(wrch);
3047 ret = chn_setlatency(wrch, policy);
3048 CHN_UNLOCK(wrch);
3049 }
3050
3051 if (ret)
3052 ret = EIO;
3053
3054 return (ret);
3055}
3056
3057/**
3058 * @brief Enable or disable "cooked" mode
3059 *
3060 * This is a handler for @c SNDCTL_DSP_COOKEDMODE. When in cooked mode, which
3061 * is the default, the sound system handles rate and format conversions
3062 * automatically (ex: user writing 11025Hz/8 bit/unsigned but card only
3063 * operates with 44100Hz/16bit/signed samples).
3064 *
3065 * Disabling cooked mode is intended for applications wanting to mmap()
3066 * a sound card's buffer space directly, bypassing the FreeBSD 2-stage
3067 * feeder architecture, presumably to gain as much control over audio
3068 * hardware as possible.
3069 *
3070 * See @c http://manuals.opensound.com/developer/SNDCTL_DSP_COOKEDMODE.html
3071 * for more details.
3072 *
3073 * @param wrch playback channel (optional; may be NULL)
3074 * @param rdch recording channel (optional; may be NULL)
3075 * @param enabled 0 = raw mode, 1 = cooked mode
3076 *
3077 * @retval EINVAL Operation not yet supported.
3078 */
3079static int
3080dsp_oss_cookedmode(struct pcm_channel *wrch, struct pcm_channel *rdch, int enabled)
3081{
3082
3083 /*
3084 * XXX I just don't get it. Why don't they call it
3085 * "BITPERFECT" ~ SNDCTL_DSP_BITPERFECT !?!?.
3086 * This is just plain so confusing, incoherent,
3087 * <insert any non-printable characters here>.
3088 */
3089 if (!(enabled == 1 || enabled == 0))
3090 return (EINVAL);
3091
3092 /*
3093 * I won't give in. I'm inverting its logic here and now.
3094 * Brag all you want, but "BITPERFECT" should be the better
3095 * term here.
3096 */
3097 enabled ^= 0x00000001;
3098
3099 if (wrch != NULL) {
3100 CHN_LOCK(wrch);
3101 wrch->flags &= ~CHN_F_BITPERFECT;
3102 wrch->flags |= (enabled != 0) ? CHN_F_BITPERFECT : 0x00000000;
3103 CHN_UNLOCK(wrch);
3104 }
3105
3106 if (rdch != NULL) {
3107 CHN_LOCK(rdch);
3108 rdch->flags &= ~CHN_F_BITPERFECT;
3109 rdch->flags |= (enabled != 0) ? CHN_F_BITPERFECT : 0x00000000;
3110 CHN_UNLOCK(rdch);
3111 }
3112
3113 return (0);
3114}
3115
3116/**
3117 * @brief Retrieve channel interleaving order
3118 *
3119 * This is the handler for @c SNDCTL_DSP_GET_CHNORDER.
3120 *
3121 * See @c http://manuals.opensound.com/developer/SNDCTL_DSP_GET_CHNORDER.html
3122 * for more details.
3123 *
3124 * @note As the ioctl definition is still under construction, FreeBSD
3125 * does not currently support SNDCTL_DSP_GET_CHNORDER.
3126 *
3127 * @param wrch playback channel (optional; may be NULL)
3128 * @param rdch recording channel (optional; may be NULL)
3129 * @param map channel map (result will be stored there)
3130 *
3131 * @retval EINVAL Operation not yet supported.
3132 */
3133static int
3134dsp_oss_getchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map)
3135{
3136 struct pcm_channel *ch;
3137 int ret;
3138
3139 ch = (wrch != NULL) ? wrch : rdch;
3140 if (ch != NULL) {
3141 CHN_LOCK(ch);
3142 ret = chn_oss_getorder(ch, map);
3143 CHN_UNLOCK(ch);
3144 } else
3145 ret = EINVAL;
3146
3147 return (ret);
3148}
3149
3150/**
3151 * @brief Specify channel interleaving order
3152 *
3153 * This is the handler for @c SNDCTL_DSP_SET_CHNORDER.
3154 *
3155 * @note As the ioctl definition is still under construction, FreeBSD
3156 * does not currently support @c SNDCTL_DSP_SET_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
3161 *
3162 * @retval EINVAL Operation not yet supported.
3163 */
3164static int
3165dsp_oss_setchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map)
3166{
3167 int ret;
3168
3169 ret = 0;
3170
3171 if (wrch != NULL) {
3172 CHN_LOCK(wrch);
3173 ret = chn_oss_setorder(wrch, map);
3174 CHN_UNLOCK(wrch);
3175 }
3176
3177 if (ret == 0 && rdch != NULL) {
3178 CHN_LOCK(rdch);
3179 ret = chn_oss_setorder(rdch, map);
3180 CHN_UNLOCK(rdch);
3181 }
3182
3183 return (ret);
3184}
3185
3186static int
3187dsp_oss_getchannelmask(struct pcm_channel *wrch, struct pcm_channel *rdch,
3188 int *mask)
3189{
3190 struct pcm_channel *ch;
3191 uint32_t chnmask;
3192 int ret;
3193
3194 chnmask = 0;
3195 ch = (wrch != NULL) ? wrch : rdch;
3196
3197 if (ch != NULL) {
3198 CHN_LOCK(ch);
3199 ret = chn_oss_getmask(ch, &chnmask);
3200 CHN_UNLOCK(ch);
3201 } else
3202 ret = EINVAL;
3203
3204 if (ret == 0)
3205 *mask = chnmask;
3206
3207 return (ret);
3208}
3209
3210#ifdef OSSV4_EXPERIMENT
3211/**
3212 * @brief Retrieve an audio device's label
3213 *
3214 * This is a handler for the @c SNDCTL_GETLABEL ioctl.
3215 *
3216 * See @c http://manuals.opensound.com/developer/SNDCTL_GETLABEL.html
3217 * for more details.
3218 *
3219 * From Hannu@4Front: "For example ossxmix (just like some HW mixer
3220 * consoles) can show variable "labels" for certain controls. By default
3221 * the application name (say quake) is shown as the label but
3222 * applications may change the labels themselves."
3223 *
3224 * @note As the ioctl definition is still under construction, FreeBSD
3225 * does not currently support @c SNDCTL_GETLABEL.
3226 *
3227 * @param wrch playback channel (optional; may be NULL)
3228 * @param rdch recording channel (optional; may be NULL)
3229 * @param label label gets copied here
3230 *
3231 * @retval EINVAL Operation not yet supported.
3232 */
3233static int
3234dsp_oss_getlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label)
3235{
3236 return (EINVAL);
3237}
3238
3239/**
3240 * @brief Specify an audio device's label
3241 *
3242 * This is a handler for the @c SNDCTL_SETLABEL ioctl. Please see the
3243 * comments for @c dsp_oss_getlabel immediately above.
3244 *
3245 * See @c http://manuals.opensound.com/developer/SNDCTL_GETLABEL.html
3246 * for more details.
3247 *
3248 * @note As the ioctl definition is still under construction, FreeBSD
3249 * does not currently support SNDCTL_SETLABEL.
3250 *
3251 * @param wrch playback channel (optional; may be NULL)
3252 * @param rdch recording channel (optional; may be NULL)
3253 * @param label label gets copied from here
3254 *
3255 * @retval EINVAL Operation not yet supported.
3256 */
3257static int
3258dsp_oss_setlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label)
3259{
3260 return (EINVAL);
3261}
3262
3263/**
3264 * @brief Retrieve name of currently played song
3265 *
3266 * This is a handler for the @c SNDCTL_GETSONG ioctl. Audio players could
3267 * tell the system the name of the currently playing song, which would be
3268 * visible in @c /dev/sndstat.
3269 *
3270 * See @c http://manuals.opensound.com/developer/SNDCTL_GETSONG.html
3271 * for more details.
3272 *
3273 * @note As the ioctl definition is still under construction, FreeBSD
3274 * does not currently support SNDCTL_GETSONG.
3275 *
3276 * @param wrch playback channel (optional; may be NULL)
3277 * @param rdch recording channel (optional; may be NULL)
3278 * @param song song name gets copied here
3279 *
3280 * @retval EINVAL Operation not yet supported.
3281 */
3282static int
3283dsp_oss_getsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song)
3284{
3285 return (EINVAL);
3286}
3287
3288/**
3289 * @brief Retrieve name of currently played song
3290 *
3291 * This is a handler for the @c SNDCTL_SETSONG ioctl. Audio players could
3292 * tell the system the name of the currently playing song, which would be
3293 * visible in @c /dev/sndstat.
3294 *
3295 * See @c http://manuals.opensound.com/developer/SNDCTL_SETSONG.html
3296 * for more details.
3297 *
3298 * @note As the ioctl definition is still under construction, FreeBSD
3299 * does not currently support SNDCTL_SETSONG.
3300 *
3301 * @param wrch playback channel (optional; may be NULL)
3302 * @param rdch recording channel (optional; may be NULL)
3303 * @param song song name gets copied from here
3304 *
3305 * @retval EINVAL Operation not yet supported.
3306 */
3307static int
3308dsp_oss_setsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song)
3309{
3310 return (EINVAL);
3311}
3312
3313/**
3314 * @brief Rename a device
3315 *
3316 * This is a handler for the @c SNDCTL_SETNAME ioctl.
3317 *
3318 * See @c http://manuals.opensound.com/developer/SNDCTL_SETNAME.html for
3319 * more details.
3320 *
3321 * From Hannu@4Front: "This call is used to change the device name
3322 * reported in /dev/sndstat and ossinfo. So instead of using some generic
3323 * 'OSS loopback audio (MIDI) driver' the device may be given a meaningfull
3324 * name depending on the current context (for example 'OSS virtual wave table
3325 * synth' or 'VoIP link to London')."
3326 *
3327 * @note As the ioctl definition is still under construction, FreeBSD
3328 * does not currently support SNDCTL_SETNAME.
3329 *
3330 * @param wrch playback channel (optional; may be NULL)
3331 * @param rdch recording channel (optional; may be NULL)
3332 * @param name new device name gets copied from here
3333 *
3334 * @retval EINVAL Operation not yet supported.
3335 */
3336static int
3337dsp_oss_setname(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *name)
3338{
3339 return (EINVAL);
3340}
3341#endif /* !OSSV4_EXPERIMENT */
|