FreeBSD/Linux Kernel Cross Reference
sys/dev/sound/pcm/dsp.c
1 /*-
2 * Copyright (c) 2005-2009 Ariff Abdullah <ariff@FreeBSD.org>
3 * Portions Copyright (c) Ryan Beasley <ryan.beasley@gmail.com> - GSoC 2006
4 * Copyright (c) 1999 Cameron Grant <cg@FreeBSD.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #ifdef HAVE_KERNEL_OPTION_HEADERS
30 #include "opt_snd.h"
31 #endif
32
33 #include <dev/sound/pcm/sound.h>
34 #include <sys/ctype.h>
35 #include <sys/sysent.h>
36
37 #include <vm/vm.h>
38 #include <vm/vm_object.h>
39 #include <vm/vm_page.h>
40 #include <vm/vm_pager.h>
41
42 SND_DECLARE_FILE("$FreeBSD: releng/8.3/sys/dev/sound/pcm/dsp.c 227106 2011-11-05 11:04:25Z avg $");
43
44 static int dsp_mmap_allow_prot_exec = 0;
45 SYSCTL_INT(_hw_snd, OID_AUTO, compat_linux_mmap, CTLFLAG_RW,
46 &dsp_mmap_allow_prot_exec, 0,
47 "linux mmap compatibility (-1=force disable 0=auto 1=force enable)");
48
49 struct dsp_cdevinfo {
50 struct pcm_channel *rdch, *wrch;
51 struct pcm_channel *volch;
52 int busy, simplex;
53 TAILQ_ENTRY(dsp_cdevinfo) link;
54 };
55
56 #define PCM_RDCH(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->rdch)
57 #define PCM_WRCH(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->wrch)
58 #define PCM_VOLCH(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->volch)
59 #define PCM_SIMPLEX(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->simplex)
60
61 #define DSP_CDEVINFO_CACHESIZE 8
62
63 #define DSP_REGISTERED(x, y) (PCM_REGISTERED(x) && \
64 (y) != NULL && (y)->si_drv1 != NULL)
65
66 #define OLDPCM_IOCTL
67
68 static d_open_t dsp_open;
69 static d_close_t dsp_close;
70 static d_read_t dsp_read;
71 static d_write_t dsp_write;
72 static d_ioctl_t dsp_ioctl;
73 static d_poll_t dsp_poll;
74 static d_mmap_t dsp_mmap;
75 static d_mmap_single_t dsp_mmap_single;
76
77 struct cdevsw dsp_cdevsw = {
78 .d_version = D_VERSION,
79 .d_open = dsp_open,
80 .d_close = dsp_close,
81 .d_read = dsp_read,
82 .d_write = dsp_write,
83 .d_ioctl = dsp_ioctl,
84 .d_poll = dsp_poll,
85 .d_mmap = dsp_mmap,
86 .d_mmap_single = dsp_mmap_single,
87 .d_name = "dsp",
88 };
89
90 static eventhandler_tag dsp_ehtag = NULL;
91 static int dsp_umax = -1;
92 static int dsp_cmax = -1;
93
94 static int dsp_oss_syncgroup(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_syncgroup *group);
95 static int dsp_oss_syncstart(int sg_id);
96 static int dsp_oss_policy(struct pcm_channel *wrch, struct pcm_channel *rdch, int policy);
97 static int dsp_oss_cookedmode(struct pcm_channel *wrch, struct pcm_channel *rdch, int enabled);
98 static int dsp_oss_getchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map);
99 static int dsp_oss_setchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map);
100 static int dsp_oss_getchannelmask(struct pcm_channel *wrch, struct pcm_channel *rdch, int *mask);
101 #ifdef OSSV4_EXPERIMENT
102 static int dsp_oss_getlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label);
103 static int dsp_oss_setlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label);
104 static int dsp_oss_getsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song);
105 static int dsp_oss_setsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song);
106 static int dsp_oss_setname(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *name);
107 #endif
108
109 static struct snddev_info *
110 dsp_get_info(struct cdev *dev)
111 {
112 return (devclass_get_softc(pcm_devclass, PCMUNIT(dev)));
113 }
114
115 static uint32_t
116 dsp_get_flags(struct cdev *dev)
117 {
118 device_t bdev;
119
120 bdev = devclass_get_device(pcm_devclass, PCMUNIT(dev));
121
122 return ((bdev != NULL) ? pcm_getflags(bdev) : 0xffffffff);
123 }
124
125 static void
126 dsp_set_flags(struct cdev *dev, uint32_t flags)
127 {
128 device_t bdev;
129
130 bdev = devclass_get_device(pcm_devclass, PCMUNIT(dev));
131
132 if (bdev != NULL)
133 pcm_setflags(bdev, flags);
134 }
135
136 /*
137 * return the channels associated with an open device instance.
138 * lock channels specified.
139 */
140 static int
141 getchns(struct cdev *dev, struct pcm_channel **rdch, struct pcm_channel **wrch,
142 uint32_t prio)
143 {
144 struct snddev_info *d;
145 struct pcm_channel *ch;
146 uint32_t flags;
147
148 if (PCM_SIMPLEX(dev) != 0) {
149 d = dsp_get_info(dev);
150 if (!PCM_REGISTERED(d))
151 return (ENXIO);
152 PCM_LOCK(d);
153 PCM_WAIT(d);
154 PCM_ACQUIRE(d);
155 /*
156 * Note: order is important -
157 * pcm flags -> prio query flags -> wild guess
158 */
159 ch = NULL;
160 flags = dsp_get_flags(dev);
161 if (flags & SD_F_PRIO_WR) {
162 ch = PCM_RDCH(dev);
163 PCM_RDCH(dev) = NULL;
164 } else if (flags & SD_F_PRIO_RD) {
165 ch = PCM_WRCH(dev);
166 PCM_WRCH(dev) = NULL;
167 } else if (prio & SD_F_PRIO_WR) {
168 ch = PCM_RDCH(dev);
169 PCM_RDCH(dev) = NULL;
170 flags |= SD_F_PRIO_WR;
171 } else if (prio & SD_F_PRIO_RD) {
172 ch = PCM_WRCH(dev);
173 PCM_WRCH(dev) = NULL;
174 flags |= SD_F_PRIO_RD;
175 } else if (PCM_WRCH(dev) != NULL) {
176 ch = PCM_RDCH(dev);
177 PCM_RDCH(dev) = NULL;
178 flags |= SD_F_PRIO_WR;
179 } else if (PCM_RDCH(dev) != NULL) {
180 ch = PCM_WRCH(dev);
181 PCM_WRCH(dev) = NULL;
182 flags |= SD_F_PRIO_RD;
183 }
184 PCM_SIMPLEX(dev) = 0;
185 dsp_set_flags(dev, flags);
186 if (ch != NULL) {
187 CHN_LOCK(ch);
188 pcm_chnref(ch, -1);
189 pcm_chnrelease(ch);
190 }
191 PCM_RELEASE(d);
192 PCM_UNLOCK(d);
193 }
194
195 *rdch = PCM_RDCH(dev);
196 *wrch = PCM_WRCH(dev);
197
198 if (*rdch != NULL && (prio & SD_F_PRIO_RD))
199 CHN_LOCK(*rdch);
200 if (*wrch != NULL && (prio & SD_F_PRIO_WR))
201 CHN_LOCK(*wrch);
202
203 return (0);
204 }
205
206 /* unlock specified channels */
207 static void
208 relchns(struct cdev *dev, struct pcm_channel *rdch, struct pcm_channel *wrch,
209 uint32_t prio)
210 {
211 if (wrch != NULL && (prio & SD_F_PRIO_WR))
212 CHN_UNLOCK(wrch);
213 if (rdch != NULL && (prio & SD_F_PRIO_RD))
214 CHN_UNLOCK(rdch);
215 }
216
217 static void
218 dsp_cdevinfo_alloc(struct cdev *dev,
219 struct pcm_channel *rdch, struct pcm_channel *wrch,
220 struct pcm_channel *volch)
221 {
222 struct snddev_info *d;
223 struct dsp_cdevinfo *cdi;
224 int simplex;
225
226 d = dsp_get_info(dev);
227
228 KASSERT(PCM_REGISTERED(d) && dev != NULL && dev->si_drv1 == NULL &&
229 ((rdch == NULL && wrch == NULL) || rdch != wrch),
230 ("bogus %s(), what are you trying to accomplish here?", __func__));
231 PCM_BUSYASSERT(d);
232 PCM_LOCKASSERT(d);
233
234 simplex = (dsp_get_flags(dev) & SD_F_SIMPLEX) ? 1 : 0;
235
236 /*
237 * Scan for free instance entry and put it into the end of list.
238 * Create new one if necessary.
239 */
240 TAILQ_FOREACH(cdi, &d->dsp_cdevinfo_pool, link) {
241 if (cdi->busy != 0)
242 break;
243 cdi->rdch = rdch;
244 cdi->wrch = wrch;
245 cdi->volch = volch;
246 cdi->simplex = simplex;
247 cdi->busy = 1;
248 TAILQ_REMOVE(&d->dsp_cdevinfo_pool, cdi, link);
249 TAILQ_INSERT_TAIL(&d->dsp_cdevinfo_pool, cdi, link);
250 dev->si_drv1 = cdi;
251 return;
252 }
253 PCM_UNLOCK(d);
254 cdi = malloc(sizeof(*cdi), M_DEVBUF, M_WAITOK | M_ZERO);
255 PCM_LOCK(d);
256 cdi->rdch = rdch;
257 cdi->wrch = wrch;
258 cdi->volch = volch;
259 cdi->simplex = simplex;
260 cdi->busy = 1;
261 TAILQ_INSERT_TAIL(&d->dsp_cdevinfo_pool, cdi, link);
262 dev->si_drv1 = cdi;
263 }
264
265 static void
266 dsp_cdevinfo_free(struct cdev *dev)
267 {
268 struct snddev_info *d;
269 struct dsp_cdevinfo *cdi, *tmp;
270 uint32_t flags;
271 int i;
272
273 d = dsp_get_info(dev);
274
275 KASSERT(PCM_REGISTERED(d) && dev != NULL && dev->si_drv1 != NULL &&
276 PCM_RDCH(dev) == NULL && PCM_WRCH(dev) == NULL &&
277 PCM_VOLCH(dev) == NULL,
278 ("bogus %s(), what are you trying to accomplish here?", __func__));
279 PCM_BUSYASSERT(d);
280 PCM_LOCKASSERT(d);
281
282 cdi = dev->si_drv1;
283 dev->si_drv1 = NULL;
284 cdi->rdch = NULL;
285 cdi->wrch = NULL;
286 cdi->volch = NULL;
287 cdi->simplex = 0;
288 cdi->busy = 0;
289
290 /*
291 * Once it is free, move it back to the beginning of list for
292 * faster new entry allocation.
293 */
294 TAILQ_REMOVE(&d->dsp_cdevinfo_pool, cdi, link);
295 TAILQ_INSERT_HEAD(&d->dsp_cdevinfo_pool, cdi, link);
296
297 /*
298 * Scan the list, cache free entries up to DSP_CDEVINFO_CACHESIZE.
299 * Reset simplex flags.
300 */
301 flags = dsp_get_flags(dev) & ~SD_F_PRIO_SET;
302 i = DSP_CDEVINFO_CACHESIZE;
303 TAILQ_FOREACH_SAFE(cdi, &d->dsp_cdevinfo_pool, link, tmp) {
304 if (cdi->busy != 0) {
305 if (cdi->simplex == 0) {
306 if (cdi->rdch != NULL)
307 flags |= SD_F_PRIO_RD;
308 if (cdi->wrch != NULL)
309 flags |= SD_F_PRIO_WR;
310 }
311 } else {
312 if (i == 0) {
313 TAILQ_REMOVE(&d->dsp_cdevinfo_pool, cdi, link);
314 free(cdi, M_DEVBUF);
315 } else
316 i--;
317 }
318 }
319 dsp_set_flags(dev, flags);
320 }
321
322 void
323 dsp_cdevinfo_init(struct snddev_info *d)
324 {
325 struct dsp_cdevinfo *cdi;
326 int i;
327
328 KASSERT(d != NULL, ("NULL snddev_info"));
329 PCM_BUSYASSERT(d);
330 PCM_UNLOCKASSERT(d);
331
332 TAILQ_INIT(&d->dsp_cdevinfo_pool);
333 for (i = 0; i < DSP_CDEVINFO_CACHESIZE; i++) {
334 cdi = malloc(sizeof(*cdi), M_DEVBUF, M_WAITOK | M_ZERO);
335 TAILQ_INSERT_HEAD(&d->dsp_cdevinfo_pool, cdi, link);
336 }
337 }
338
339 void
340 dsp_cdevinfo_flush(struct snddev_info *d)
341 {
342 struct dsp_cdevinfo *cdi, *tmp;
343
344 KASSERT(d != NULL, ("NULL snddev_info"));
345 PCM_BUSYASSERT(d);
346 PCM_UNLOCKASSERT(d);
347
348 cdi = TAILQ_FIRST(&d->dsp_cdevinfo_pool);
349 while (cdi != NULL) {
350 tmp = TAILQ_NEXT(cdi, link);
351 free(cdi, M_DEVBUF);
352 cdi = tmp;
353 }
354 TAILQ_INIT(&d->dsp_cdevinfo_pool);
355 }
356
357 /* duplex / simplex cdev type */
358 enum {
359 DSP_CDEV_TYPE_RDONLY, /* simplex read-only (record) */
360 DSP_CDEV_TYPE_WRONLY, /* simplex write-only (play) */
361 DSP_CDEV_TYPE_RDWR /* duplex read, write, or both */
362 };
363
364 enum {
365 DSP_CDEV_VOLCTL_NONE,
366 DSP_CDEV_VOLCTL_READ,
367 DSP_CDEV_VOLCTL_WRITE
368 };
369
370 #define DSP_F_VALID(x) ((x) & (FREAD | FWRITE))
371 #define DSP_F_DUPLEX(x) (((x) & (FREAD | FWRITE)) == (FREAD | FWRITE))
372 #define DSP_F_SIMPLEX(x) (!DSP_F_DUPLEX(x))
373 #define DSP_F_READ(x) ((x) & FREAD)
374 #define DSP_F_WRITE(x) ((x) & FWRITE)
375
376 static const struct {
377 int type;
378 char *name;
379 char *sep;
380 char *alias;
381 int use_sep;
382 int hw;
383 int max;
384 int volctl;
385 uint32_t fmt, spd;
386 int query;
387 } dsp_cdevs[] = {
388 { SND_DEV_DSP, "dsp", ".", NULL, 0, 0, 0, 0,
389 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
390 DSP_CDEV_TYPE_RDWR },
391 { SND_DEV_AUDIO, "audio", ".", NULL, 0, 0, 0, 0,
392 SND_FORMAT(AFMT_MU_LAW, 1, 0), DSP_DEFAULT_SPEED,
393 DSP_CDEV_TYPE_RDWR },
394 { SND_DEV_DSP16, "dspW", ".", NULL, 0, 0, 0, 0,
395 SND_FORMAT(AFMT_S16_LE, 1, 0), DSP_DEFAULT_SPEED,
396 DSP_CDEV_TYPE_RDWR },
397 { SND_DEV_DSPHW_PLAY, "dsp", ".p", NULL, 1, 1, SND_MAXHWCHAN, 1,
398 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_WRONLY },
399 { SND_DEV_DSPHW_VPLAY, "dsp", ".vp", NULL, 1, 1, SND_MAXVCHANS, 1,
400 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_WRONLY },
401 { SND_DEV_DSPHW_REC, "dsp", ".r", NULL, 1, 1, SND_MAXHWCHAN, 1,
402 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_RDONLY },
403 { SND_DEV_DSPHW_VREC, "dsp", ".vr", NULL, 1, 1, SND_MAXVCHANS, 1,
404 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_RDONLY },
405 { SND_DEV_DSPHW_CD, "dspcd", ".", NULL, 0, 0, 0, 0,
406 SND_FORMAT(AFMT_S16_LE, 2, 0), 44100, DSP_CDEV_TYPE_RDWR },
407 /* Low priority, OSSv4 aliases. */
408 { SND_DEV_DSP, "dsp_ac3", ".", "dsp", 0, 0, 0, 0,
409 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
410 DSP_CDEV_TYPE_RDWR },
411 { SND_DEV_DSP, "dsp_mmap", ".", "dsp", 0, 0, 0, 0,
412 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
413 DSP_CDEV_TYPE_RDWR },
414 { SND_DEV_DSP, "dsp_multich", ".", "dsp", 0, 0, 0, 0,
415 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
416 DSP_CDEV_TYPE_RDWR },
417 { SND_DEV_DSP, "dsp_spdifout", ".", "dsp", 0, 0, 0, 0,
418 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
419 DSP_CDEV_TYPE_RDWR },
420 { SND_DEV_DSP, "dsp_spdifin", ".", "dsp", 0, 0, 0, 0,
421 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
422 DSP_CDEV_TYPE_RDWR },
423 };
424
425 #define DSP_FIXUP_ERROR() do { \
426 prio = dsp_get_flags(i_dev); \
427 if (!DSP_F_VALID(flags)) \
428 error = EINVAL; \
429 if (!DSP_F_DUPLEX(flags) && \
430 ((DSP_F_READ(flags) && d->reccount == 0) || \
431 (DSP_F_WRITE(flags) && d->playcount == 0))) \
432 error = ENOTSUP; \
433 else if (!DSP_F_DUPLEX(flags) && (prio & SD_F_SIMPLEX) && \
434 ((DSP_F_READ(flags) && (prio & SD_F_PRIO_WR)) || \
435 (DSP_F_WRITE(flags) && (prio & SD_F_PRIO_RD)))) \
436 error = EBUSY; \
437 else if (DSP_REGISTERED(d, i_dev)) \
438 error = EBUSY; \
439 } while (0)
440
441 static int
442 dsp_open(struct cdev *i_dev, int flags, int mode, struct thread *td)
443 {
444 struct pcm_channel *rdch, *wrch;
445 struct snddev_info *d;
446 uint32_t fmt, spd, prio, volctl;
447 int i, error, rderror, wrerror, devtype, wdevunit, rdevunit;
448
449 /* Kind of impossible.. */
450 if (i_dev == NULL || td == NULL)
451 return (ENODEV);
452
453 d = dsp_get_info(i_dev);
454 if (!PCM_REGISTERED(d))
455 return (EBADF);
456
457 PCM_GIANT_ENTER(d);
458
459 /* Lock snddev so nobody else can monkey with it. */
460 PCM_LOCK(d);
461 PCM_WAIT(d);
462
463 /*
464 * Try to acquire cloned device before someone else pick it.
465 * ENODEV means this is not a cloned droids.
466 */
467 error = snd_clone_acquire(i_dev);
468 if (!(error == 0 || error == ENODEV)) {
469 DSP_FIXUP_ERROR();
470 PCM_UNLOCK(d);
471 PCM_GIANT_EXIT(d);
472 return (error);
473 }
474
475 error = 0;
476 DSP_FIXUP_ERROR();
477
478 if (error != 0) {
479 (void)snd_clone_release(i_dev);
480 PCM_UNLOCK(d);
481 PCM_GIANT_EXIT(d);
482 return (error);
483 }
484
485 /*
486 * That is just enough. Acquire and unlock pcm lock so
487 * the other will just have to wait until we finish doing
488 * everything.
489 */
490 PCM_ACQUIRE(d);
491 PCM_UNLOCK(d);
492
493 devtype = PCMDEV(i_dev);
494 wdevunit = -1;
495 rdevunit = -1;
496 fmt = 0;
497 spd = 0;
498 volctl = DSP_CDEV_VOLCTL_NONE;
499
500 for (i = 0; i < (sizeof(dsp_cdevs) / sizeof(dsp_cdevs[0])); i++) {
501 if (devtype != dsp_cdevs[i].type || dsp_cdevs[i].alias != NULL)
502 continue;
503 /*
504 * Volume control only valid for DSPHW devices,
505 * and it must be opened in opposite direction be it
506 * simplex or duplex. Anything else will be handled
507 * as usual.
508 */
509 if (dsp_cdevs[i].query == DSP_CDEV_TYPE_WRONLY) {
510 if (dsp_cdevs[i].volctl != 0 &&
511 DSP_F_READ(flags)) {
512 volctl = DSP_CDEV_VOLCTL_WRITE;
513 flags &= ~FREAD;
514 flags |= FWRITE;
515 }
516 if (DSP_F_READ(flags)) {
517 (void)snd_clone_release(i_dev);
518 PCM_RELEASE_QUICK(d);
519 PCM_GIANT_EXIT(d);
520 return (ENOTSUP);
521 }
522 wdevunit = dev2unit(i_dev);
523 } else if (dsp_cdevs[i].query == DSP_CDEV_TYPE_RDONLY) {
524 if (dsp_cdevs[i].volctl != 0 &&
525 DSP_F_WRITE(flags)) {
526 volctl = DSP_CDEV_VOLCTL_READ;
527 flags &= ~FWRITE;
528 flags |= FREAD;
529 }
530 if (DSP_F_WRITE(flags)) {
531 (void)snd_clone_release(i_dev);
532 PCM_RELEASE_QUICK(d);
533 PCM_GIANT_EXIT(d);
534 return (ENOTSUP);
535 }
536 rdevunit = dev2unit(i_dev);
537 }
538 fmt = dsp_cdevs[i].fmt;
539 spd = dsp_cdevs[i].spd;
540 break;
541 }
542
543 /* No matching devtype? */
544 if (fmt == 0 || spd == 0)
545 panic("impossible devtype %d", devtype);
546
547 rdch = NULL;
548 wrch = NULL;
549 rderror = 0;
550 wrerror = 0;
551
552 /*
553 * if we get here, the open request is valid- either:
554 * * we were previously not open
555 * * we were open for play xor record and the opener wants
556 * the non-open direction
557 */
558 if (DSP_F_READ(flags)) {
559 /* open for read */
560 rderror = pcm_chnalloc(d, &rdch, PCMDIR_REC,
561 td->td_proc->p_pid, td->td_proc->p_comm, rdevunit);
562
563 if (rderror == 0 && chn_reset(rdch, fmt, spd) != 0)
564 rderror = ENXIO;
565
566 if (volctl == DSP_CDEV_VOLCTL_READ)
567 rderror = 0;
568
569 if (rderror != 0) {
570 if (rdch != NULL)
571 pcm_chnrelease(rdch);
572 if (!DSP_F_DUPLEX(flags)) {
573 (void)snd_clone_release(i_dev);
574 PCM_RELEASE_QUICK(d);
575 PCM_GIANT_EXIT(d);
576 return (rderror);
577 }
578 rdch = NULL;
579 } else if (volctl == DSP_CDEV_VOLCTL_READ) {
580 if (rdch != NULL) {
581 pcm_chnref(rdch, 1);
582 pcm_chnrelease(rdch);
583 }
584 } else {
585 if (flags & O_NONBLOCK)
586 rdch->flags |= CHN_F_NBIO;
587 if (flags & O_EXCL)
588 rdch->flags |= CHN_F_EXCLUSIVE;
589 pcm_chnref(rdch, 1);
590 if (volctl == DSP_CDEV_VOLCTL_NONE)
591 chn_vpc_reset(rdch, SND_VOL_C_PCM, 0);
592 CHN_UNLOCK(rdch);
593 }
594 }
595
596 if (DSP_F_WRITE(flags)) {
597 /* open for write */
598 wrerror = pcm_chnalloc(d, &wrch, PCMDIR_PLAY,
599 td->td_proc->p_pid, td->td_proc->p_comm, wdevunit);
600
601 if (wrerror == 0 && chn_reset(wrch, fmt, spd) != 0)
602 wrerror = ENXIO;
603
604 if (volctl == DSP_CDEV_VOLCTL_WRITE)
605 wrerror = 0;
606
607 if (wrerror != 0) {
608 if (wrch != NULL)
609 pcm_chnrelease(wrch);
610 if (!DSP_F_DUPLEX(flags)) {
611 if (rdch != NULL) {
612 /*
613 * Lock, deref and release previously
614 * created record channel
615 */
616 CHN_LOCK(rdch);
617 pcm_chnref(rdch, -1);
618 pcm_chnrelease(rdch);
619 }
620 (void)snd_clone_release(i_dev);
621 PCM_RELEASE_QUICK(d);
622 PCM_GIANT_EXIT(d);
623 return (wrerror);
624 }
625 wrch = NULL;
626 } else if (volctl == DSP_CDEV_VOLCTL_WRITE) {
627 if (wrch != NULL) {
628 pcm_chnref(wrch, 1);
629 pcm_chnrelease(wrch);
630 }
631 } else {
632 if (flags & O_NONBLOCK)
633 wrch->flags |= CHN_F_NBIO;
634 if (flags & O_EXCL)
635 wrch->flags |= CHN_F_EXCLUSIVE;
636 pcm_chnref(wrch, 1);
637 if (volctl == DSP_CDEV_VOLCTL_NONE)
638 chn_vpc_reset(wrch, SND_VOL_C_PCM, 0);
639 CHN_UNLOCK(wrch);
640 }
641 }
642
643
644 PCM_LOCK(d);
645
646 /*
647 * We're done. Allocate channels information for this cdev.
648 */
649 switch (volctl) {
650 case DSP_CDEV_VOLCTL_READ:
651 KASSERT(wrch == NULL, ("wrch=%p not null!", wrch));
652 dsp_cdevinfo_alloc(i_dev, NULL, NULL, rdch);
653 break;
654 case DSP_CDEV_VOLCTL_WRITE:
655 KASSERT(rdch == NULL, ("rdch=%p not null!", rdch));
656 dsp_cdevinfo_alloc(i_dev, NULL, NULL, wrch);
657 break;
658 case DSP_CDEV_VOLCTL_NONE:
659 default:
660 if (wrch == NULL && rdch == NULL) {
661 (void)snd_clone_release(i_dev);
662 PCM_RELEASE(d);
663 PCM_UNLOCK(d);
664 PCM_GIANT_EXIT(d);
665 if (wrerror != 0)
666 return (wrerror);
667 if (rderror != 0)
668 return (rderror);
669 return (EINVAL);
670 }
671 dsp_cdevinfo_alloc(i_dev, rdch, wrch, NULL);
672 if (rdch != NULL)
673 CHN_INSERT_HEAD(d, rdch, channels.pcm.opened);
674 if (wrch != NULL)
675 CHN_INSERT_HEAD(d, wrch, channels.pcm.opened);
676 break;
677 }
678
679 /*
680 * Increase clone refcount for its automatic garbage collector.
681 */
682 (void)snd_clone_ref(i_dev);
683
684 PCM_RELEASE(d);
685 PCM_UNLOCK(d);
686
687 PCM_GIANT_LEAVE(d);
688
689 return (0);
690 }
691
692 static int
693 dsp_close(struct cdev *i_dev, int flags, int mode, struct thread *td)
694 {
695 struct pcm_channel *rdch, *wrch, *volch;
696 struct snddev_info *d;
697 int sg_ids, rdref, wdref;
698
699 d = dsp_get_info(i_dev);
700 if (!DSP_REGISTERED(d, i_dev))
701 return (EBADF);
702
703 PCM_GIANT_ENTER(d);
704
705 PCM_LOCK(d);
706 PCM_WAIT(d);
707 PCM_ACQUIRE(d);
708
709 rdch = PCM_RDCH(i_dev);
710 wrch = PCM_WRCH(i_dev);
711 volch = PCM_VOLCH(i_dev);
712
713 PCM_RDCH(i_dev) = NULL;
714 PCM_WRCH(i_dev) = NULL;
715 PCM_VOLCH(i_dev) = NULL;
716
717 rdref = -1;
718 wdref = -1;
719
720 if (volch != NULL) {
721 if (volch == rdch)
722 rdref--;
723 else if (volch == wrch)
724 wdref--;
725 else {
726 CHN_LOCK(volch);
727 pcm_chnref(volch, -1);
728 CHN_UNLOCK(volch);
729 }
730 }
731
732 if (rdch != NULL)
733 CHN_REMOVE(d, rdch, channels.pcm.opened);
734 if (wrch != NULL)
735 CHN_REMOVE(d, wrch, channels.pcm.opened);
736
737 if (rdch != NULL || wrch != NULL) {
738 PCM_UNLOCK(d);
739 if (rdch != NULL) {
740 /*
741 * The channel itself need not be locked because:
742 * a) Adding a channel to a syncgroup happens only
743 * in dsp_ioctl(), which cannot run concurrently
744 * to dsp_close().
745 * b) The syncmember pointer (sm) is protected by
746 * the global syncgroup list lock.
747 * c) A channel can't just disappear, invalidating
748 * pointers, unless it's closed/dereferenced
749 * first.
750 */
751 PCM_SG_LOCK();
752 sg_ids = chn_syncdestroy(rdch);
753 PCM_SG_UNLOCK();
754 if (sg_ids != 0)
755 free_unr(pcmsg_unrhdr, sg_ids);
756
757 CHN_LOCK(rdch);
758 pcm_chnref(rdch, rdref);
759 chn_abort(rdch); /* won't sleep */
760 rdch->flags &= ~(CHN_F_RUNNING | CHN_F_MMAP |
761 CHN_F_DEAD | CHN_F_EXCLUSIVE);
762 chn_reset(rdch, 0, 0);
763 pcm_chnrelease(rdch);
764 }
765 if (wrch != NULL) {
766 /*
767 * Please see block above.
768 */
769 PCM_SG_LOCK();
770 sg_ids = chn_syncdestroy(wrch);
771 PCM_SG_UNLOCK();
772 if (sg_ids != 0)
773 free_unr(pcmsg_unrhdr, sg_ids);
774
775 CHN_LOCK(wrch);
776 pcm_chnref(wrch, wdref);
777 chn_flush(wrch); /* may sleep */
778 wrch->flags &= ~(CHN_F_RUNNING | CHN_F_MMAP |
779 CHN_F_DEAD | CHN_F_EXCLUSIVE);
780 chn_reset(wrch, 0, 0);
781 pcm_chnrelease(wrch);
782 }
783 PCM_LOCK(d);
784 }
785
786 dsp_cdevinfo_free(i_dev);
787 /*
788 * Release clone busy state and unref it so the automatic
789 * garbage collector will get the hint and do the remaining
790 * cleanup process.
791 */
792 (void)snd_clone_release(i_dev);
793
794 /*
795 * destroy_dev() might sleep, so release pcm lock
796 * here and rely on pcm cv serialization.
797 */
798 PCM_UNLOCK(d);
799 (void)snd_clone_unref(i_dev);
800 PCM_LOCK(d);
801
802 PCM_RELEASE(d);
803 PCM_UNLOCK(d);
804
805 PCM_GIANT_LEAVE(d);
806
807 return (0);
808 }
809
810 static __inline int
811 dsp_io_ops(struct cdev *i_dev, struct uio *buf)
812 {
813 struct snddev_info *d;
814 struct pcm_channel **ch, *rdch, *wrch;
815 int (*chn_io)(struct pcm_channel *, struct uio *);
816 int prio, ret;
817 pid_t runpid;
818
819 KASSERT(i_dev != NULL && buf != NULL &&
820 (buf->uio_rw == UIO_READ || buf->uio_rw == UIO_WRITE),
821 ("%s(): io train wreck!", __func__));
822
823 d = dsp_get_info(i_dev);
824 if (!DSP_REGISTERED(d, i_dev))
825 return (EBADF);
826
827 PCM_GIANT_ENTER(d);
828
829 switch (buf->uio_rw) {
830 case UIO_READ:
831 prio = SD_F_PRIO_RD;
832 ch = &rdch;
833 chn_io = chn_read;
834 break;
835 case UIO_WRITE:
836 prio = SD_F_PRIO_WR;
837 ch = &wrch;
838 chn_io = chn_write;
839 break;
840 default:
841 panic("invalid/corrupted uio direction: %d", buf->uio_rw);
842 break;
843 }
844
845 rdch = NULL;
846 wrch = NULL;
847 runpid = buf->uio_td->td_proc->p_pid;
848
849 getchns(i_dev, &rdch, &wrch, prio);
850
851 if (*ch == NULL || !((*ch)->flags & CHN_F_BUSY)) {
852 PCM_GIANT_EXIT(d);
853 return (EBADF);
854 }
855
856 if (((*ch)->flags & (CHN_F_MMAP | CHN_F_DEAD)) ||
857 (((*ch)->flags & CHN_F_RUNNING) && (*ch)->pid != runpid)) {
858 relchns(i_dev, rdch, wrch, prio);
859 PCM_GIANT_EXIT(d);
860 return (EINVAL);
861 } else if (!((*ch)->flags & CHN_F_RUNNING)) {
862 (*ch)->flags |= CHN_F_RUNNING;
863 (*ch)->pid = runpid;
864 }
865
866 /*
867 * chn_read/write must give up channel lock in order to copy bytes
868 * from/to userland, so up the "in progress" counter to make sure
869 * someone else doesn't come along and muss up the buffer.
870 */
871 ++(*ch)->inprog;
872 ret = chn_io(*ch, buf);
873 --(*ch)->inprog;
874
875 CHN_BROADCAST(&(*ch)->cv);
876
877 relchns(i_dev, rdch, wrch, prio);
878
879 PCM_GIANT_LEAVE(d);
880
881 return (ret);
882 }
883
884 static int
885 dsp_read(struct cdev *i_dev, struct uio *buf, int flag)
886 {
887 return (dsp_io_ops(i_dev, buf));
888 }
889
890 static int
891 dsp_write(struct cdev *i_dev, struct uio *buf, int flag)
892 {
893 return (dsp_io_ops(i_dev, buf));
894 }
895
896 static int
897 dsp_get_volume_channel(struct cdev *dev, struct pcm_channel **volch)
898 {
899 struct snddev_info *d;
900 struct pcm_channel *c;
901 int unit;
902
903 KASSERT(dev != NULL && volch != NULL,
904 ("%s(): NULL query dev=%p volch=%p", __func__, dev, volch));
905
906 d = dsp_get_info(dev);
907 if (!PCM_REGISTERED(d)) {
908 *volch = NULL;
909 return (EINVAL);
910 }
911
912 PCM_UNLOCKASSERT(d);
913
914 *volch = NULL;
915
916 c = PCM_VOLCH(dev);
917 if (c != NULL) {
918 if (!(c->feederflags & (1 << FEEDER_VOLUME)))
919 return (-1);
920 *volch = c;
921 return (0);
922 }
923
924 PCM_LOCK(d);
925 PCM_WAIT(d);
926 PCM_ACQUIRE(d);
927
928 unit = dev2unit(dev);
929
930 CHN_FOREACH(c, d, channels.pcm) {
931 CHN_LOCK(c);
932 if (c->unit != unit) {
933 CHN_UNLOCK(c);
934 continue;
935 }
936 *volch = c;
937 pcm_chnref(c, 1);
938 PCM_VOLCH(dev) = c;
939 CHN_UNLOCK(c);
940 PCM_RELEASE(d);
941 PCM_UNLOCK(d);
942 return ((c->feederflags & (1 << FEEDER_VOLUME)) ? 0 : -1);
943 }
944
945 PCM_RELEASE(d);
946 PCM_UNLOCK(d);
947
948 return (EINVAL);
949 }
950
951 static int
952 dsp_ioctl_channel(struct cdev *dev, struct pcm_channel *volch, u_long cmd,
953 caddr_t arg)
954 {
955 struct snddev_info *d;
956 struct pcm_channel *rdch, *wrch;
957 int j, devtype, ret;
958
959 d = dsp_get_info(dev);
960 if (!PCM_REGISTERED(d) || !(dsp_get_flags(dev) & SD_F_VPC))
961 return (-1);
962
963 PCM_UNLOCKASSERT(d);
964
965 j = cmd & 0xff;
966
967 rdch = PCM_RDCH(dev);
968 wrch = PCM_WRCH(dev);
969
970 /* No specific channel, look into cache */
971 if (volch == NULL)
972 volch = PCM_VOLCH(dev);
973
974 /* Look harder */
975 if (volch == NULL) {
976 if (j == SOUND_MIXER_RECLEV && rdch != NULL)
977 volch = rdch;
978 else if (j == SOUND_MIXER_PCM && wrch != NULL)
979 volch = wrch;
980 }
981
982 devtype = PCMDEV(dev);
983
984 /* Look super harder */
985 if (volch == NULL &&
986 (devtype == SND_DEV_DSPHW_PLAY || devtype == SND_DEV_DSPHW_VPLAY ||
987 devtype == SND_DEV_DSPHW_REC || devtype == SND_DEV_DSPHW_VREC)) {
988 ret = dsp_get_volume_channel(dev, &volch);
989 if (ret != 0)
990 return (ret);
991 if (volch == NULL)
992 return (EINVAL);
993 }
994
995 /* Final validation */
996 if (volch != NULL) {
997 CHN_LOCK(volch);
998 if (!(volch->feederflags & (1 << FEEDER_VOLUME))) {
999 CHN_UNLOCK(volch);
1000 return (-1);
1001 }
1002 if (volch->direction == PCMDIR_PLAY)
1003 wrch = volch;
1004 else
1005 rdch = volch;
1006 }
1007
1008 ret = EINVAL;
1009
1010 if (volch != NULL &&
1011 ((j == SOUND_MIXER_PCM && volch->direction == PCMDIR_PLAY) ||
1012 (j == SOUND_MIXER_RECLEV && volch->direction == PCMDIR_REC))) {
1013 if ((cmd & ~0xff) == MIXER_WRITE(0)) {
1014 int left, right, center;
1015
1016 left = *(int *)arg & 0x7f;
1017 right = ((*(int *)arg) >> 8) & 0x7f;
1018 center = (left + right) >> 1;
1019 chn_setvolume_multi(volch, SND_VOL_C_PCM, left, right,
1020 center);
1021 } else if ((cmd & ~0xff) == MIXER_READ(0)) {
1022 *(int *)arg = CHN_GETVOLUME(volch,
1023 SND_VOL_C_PCM, SND_CHN_T_FL);
1024 *(int *)arg |= CHN_GETVOLUME(volch,
1025 SND_VOL_C_PCM, SND_CHN_T_FR) << 8;
1026 }
1027 ret = 0;
1028 } else if (rdch != NULL || wrch != NULL) {
1029 switch (j) {
1030 case SOUND_MIXER_DEVMASK:
1031 case SOUND_MIXER_CAPS:
1032 case SOUND_MIXER_STEREODEVS:
1033 if ((cmd & ~0xff) == MIXER_READ(0)) {
1034 *(int *)arg = 0;
1035 if (rdch != NULL)
1036 *(int *)arg |= SOUND_MASK_RECLEV;
1037 if (wrch != NULL)
1038 *(int *)arg |= SOUND_MASK_PCM;
1039 }
1040 ret = 0;
1041 break;
1042 case SOUND_MIXER_RECMASK:
1043 case SOUND_MIXER_RECSRC:
1044 if ((cmd & ~0xff) == MIXER_READ(0))
1045 *(int *)arg = 0;
1046 ret = 0;
1047 break;
1048 default:
1049 break;
1050 }
1051 }
1052
1053 if (volch != NULL)
1054 CHN_UNLOCK(volch);
1055
1056 return (ret);
1057 }
1058
1059 static int
1060 dsp_ioctl(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode,
1061 struct thread *td)
1062 {
1063 struct pcm_channel *chn, *rdch, *wrch;
1064 struct snddev_info *d;
1065 u_long xcmd;
1066 int *arg_i, ret, tmp;
1067
1068 d = dsp_get_info(i_dev);
1069 if (!DSP_REGISTERED(d, i_dev))
1070 return (EBADF);
1071
1072 PCM_GIANT_ENTER(d);
1073
1074 arg_i = (int *)arg;
1075 ret = 0;
1076 xcmd = 0;
1077 chn = NULL;
1078
1079 if (IOCGROUP(cmd) == 'M') {
1080 if (cmd == OSS_GETVERSION) {
1081 *arg_i = SOUND_VERSION;
1082 PCM_GIANT_EXIT(d);
1083 return (0);
1084 }
1085 ret = dsp_ioctl_channel(i_dev, PCM_VOLCH(i_dev), cmd, arg);
1086 if (ret != -1) {
1087 PCM_GIANT_EXIT(d);
1088 return (ret);
1089 }
1090
1091 if (d->mixer_dev != NULL) {
1092 PCM_ACQUIRE_QUICK(d);
1093 ret = mixer_ioctl_cmd(d->mixer_dev, cmd, arg, -1, td,
1094 MIXER_CMD_DIRECT);
1095 PCM_RELEASE_QUICK(d);
1096 } else
1097 ret = EBADF;
1098
1099 PCM_GIANT_EXIT(d);
1100
1101 return (ret);
1102 }
1103
1104 /*
1105 * Certain ioctls may be made on any type of device (audio, mixer,
1106 * and MIDI). Handle those special cases here.
1107 */
1108 if (IOCGROUP(cmd) == 'X') {
1109 PCM_ACQUIRE_QUICK(d);
1110 switch(cmd) {
1111 case SNDCTL_SYSINFO:
1112 sound_oss_sysinfo((oss_sysinfo *)arg);
1113 break;
1114 case SNDCTL_CARDINFO:
1115 ret = sound_oss_card_info((oss_card_info *)arg);
1116 break;
1117 case SNDCTL_AUDIOINFO:
1118 case SNDCTL_AUDIOINFO_EX:
1119 case SNDCTL_ENGINEINFO:
1120 ret = dsp_oss_audioinfo(i_dev, (oss_audioinfo *)arg);
1121 break;
1122 case SNDCTL_MIXERINFO:
1123 ret = mixer_oss_mixerinfo(i_dev, (oss_mixerinfo *)arg);
1124 break;
1125 default:
1126 ret = EINVAL;
1127 }
1128 PCM_RELEASE_QUICK(d);
1129 PCM_GIANT_EXIT(d);
1130 return (ret);
1131 }
1132
1133 getchns(i_dev, &rdch, &wrch, 0);
1134
1135 if (wrch != NULL && (wrch->flags & CHN_F_DEAD))
1136 wrch = NULL;
1137 if (rdch != NULL && (rdch->flags & CHN_F_DEAD))
1138 rdch = NULL;
1139
1140 if (wrch == NULL && rdch == NULL) {
1141 PCM_GIANT_EXIT(d);
1142 return (EINVAL);
1143 }
1144
1145 switch(cmd) {
1146 #ifdef OLDPCM_IOCTL
1147 /*
1148 * we start with the new ioctl interface.
1149 */
1150 case AIONWRITE: /* how many bytes can write ? */
1151 if (wrch) {
1152 CHN_LOCK(wrch);
1153 /*
1154 if (wrch && wrch->bufhard.dl)
1155 while (chn_wrfeed(wrch) == 0);
1156 */
1157 *arg_i = sndbuf_getfree(wrch->bufsoft);
1158 CHN_UNLOCK(wrch);
1159 } else {
1160 *arg_i = 0;
1161 ret = EINVAL;
1162 }
1163 break;
1164
1165 case AIOSSIZE: /* set the current blocksize */
1166 {
1167 struct snd_size *p = (struct snd_size *)arg;
1168
1169 p->play_size = 0;
1170 p->rec_size = 0;
1171 PCM_ACQUIRE_QUICK(d);
1172 if (wrch) {
1173 CHN_LOCK(wrch);
1174 chn_setblocksize(wrch, 2, p->play_size);
1175 p->play_size = sndbuf_getblksz(wrch->bufsoft);
1176 CHN_UNLOCK(wrch);
1177 }
1178 if (rdch) {
1179 CHN_LOCK(rdch);
1180 chn_setblocksize(rdch, 2, p->rec_size);
1181 p->rec_size = sndbuf_getblksz(rdch->bufsoft);
1182 CHN_UNLOCK(rdch);
1183 }
1184 PCM_RELEASE_QUICK(d);
1185 }
1186 break;
1187 case AIOGSIZE: /* get the current blocksize */
1188 {
1189 struct snd_size *p = (struct snd_size *)arg;
1190
1191 if (wrch) {
1192 CHN_LOCK(wrch);
1193 p->play_size = sndbuf_getblksz(wrch->bufsoft);
1194 CHN_UNLOCK(wrch);
1195 }
1196 if (rdch) {
1197 CHN_LOCK(rdch);
1198 p->rec_size = sndbuf_getblksz(rdch->bufsoft);
1199 CHN_UNLOCK(rdch);
1200 }
1201 }
1202 break;
1203
1204 case AIOSFMT:
1205 case AIOGFMT:
1206 {
1207 snd_chan_param *p = (snd_chan_param *)arg;
1208
1209 if (cmd == AIOSFMT &&
1210 ((p->play_format != 0 && p->play_rate == 0) ||
1211 (p->rec_format != 0 && p->rec_rate == 0))) {
1212 ret = EINVAL;
1213 break;
1214 }
1215 PCM_ACQUIRE_QUICK(d);
1216 if (wrch) {
1217 CHN_LOCK(wrch);
1218 if (cmd == AIOSFMT && p->play_format != 0) {
1219 chn_setformat(wrch,
1220 SND_FORMAT(p->play_format,
1221 AFMT_CHANNEL(wrch->format),
1222 AFMT_EXTCHANNEL(wrch->format)));
1223 chn_setspeed(wrch, p->play_rate);
1224 }
1225 p->play_rate = wrch->speed;
1226 p->play_format = AFMT_ENCODING(wrch->format);
1227 CHN_UNLOCK(wrch);
1228 } else {
1229 p->play_rate = 0;
1230 p->play_format = 0;
1231 }
1232 if (rdch) {
1233 CHN_LOCK(rdch);
1234 if (cmd == AIOSFMT && p->rec_format != 0) {
1235 chn_setformat(rdch,
1236 SND_FORMAT(p->rec_format,
1237 AFMT_CHANNEL(rdch->format),
1238 AFMT_EXTCHANNEL(rdch->format)));
1239 chn_setspeed(rdch, p->rec_rate);
1240 }
1241 p->rec_rate = rdch->speed;
1242 p->rec_format = AFMT_ENCODING(rdch->format);
1243 CHN_UNLOCK(rdch);
1244 } else {
1245 p->rec_rate = 0;
1246 p->rec_format = 0;
1247 }
1248 PCM_RELEASE_QUICK(d);
1249 }
1250 break;
1251
1252 case AIOGCAP: /* get capabilities */
1253 {
1254 snd_capabilities *p = (snd_capabilities *)arg;
1255 struct pcmchan_caps *pcaps = NULL, *rcaps = NULL;
1256 struct cdev *pdev;
1257
1258 PCM_LOCK(d);
1259 if (rdch) {
1260 CHN_LOCK(rdch);
1261 rcaps = chn_getcaps(rdch);
1262 }
1263 if (wrch) {
1264 CHN_LOCK(wrch);
1265 pcaps = chn_getcaps(wrch);
1266 }
1267 p->rate_min = max(rcaps? rcaps->minspeed : 0,
1268 pcaps? pcaps->minspeed : 0);
1269 p->rate_max = min(rcaps? rcaps->maxspeed : 1000000,
1270 pcaps? pcaps->maxspeed : 1000000);
1271 p->bufsize = min(rdch? sndbuf_getsize(rdch->bufsoft) : 1000000,
1272 wrch? sndbuf_getsize(wrch->bufsoft) : 1000000);
1273 /* XXX bad on sb16 */
1274 p->formats = (rdch? chn_getformats(rdch) : 0xffffffff) &
1275 (wrch? chn_getformats(wrch) : 0xffffffff);
1276 if (rdch && wrch)
1277 p->formats |= (dsp_get_flags(i_dev) & SD_F_SIMPLEX)? 0 : AFMT_FULLDUPLEX;
1278 pdev = d->mixer_dev;
1279 p->mixers = 1; /* default: one mixer */
1280 p->inputs = pdev->si_drv1? mix_getdevs(pdev->si_drv1) : 0;
1281 p->left = p->right = 100;
1282 if (wrch)
1283 CHN_UNLOCK(wrch);
1284 if (rdch)
1285 CHN_UNLOCK(rdch);
1286 PCM_UNLOCK(d);
1287 }
1288 break;
1289
1290 case AIOSTOP:
1291 if (*arg_i == AIOSYNC_PLAY && wrch) {
1292 CHN_LOCK(wrch);
1293 *arg_i = chn_abort(wrch);
1294 CHN_UNLOCK(wrch);
1295 } else if (*arg_i == AIOSYNC_CAPTURE && rdch) {
1296 CHN_LOCK(rdch);
1297 *arg_i = chn_abort(rdch);
1298 CHN_UNLOCK(rdch);
1299 } else {
1300 printf("AIOSTOP: bad channel 0x%x\n", *arg_i);
1301 *arg_i = 0;
1302 }
1303 break;
1304
1305 case AIOSYNC:
1306 printf("AIOSYNC chan 0x%03lx pos %lu unimplemented\n",
1307 ((snd_sync_parm *)arg)->chan, ((snd_sync_parm *)arg)->pos);
1308 break;
1309 #endif
1310 /*
1311 * here follow the standard ioctls (filio.h etc.)
1312 */
1313 case FIONREAD: /* get # bytes to read */
1314 if (rdch) {
1315 CHN_LOCK(rdch);
1316 /* if (rdch && rdch->bufhard.dl)
1317 while (chn_rdfeed(rdch) == 0);
1318 */
1319 *arg_i = sndbuf_getready(rdch->bufsoft);
1320 CHN_UNLOCK(rdch);
1321 } else {
1322 *arg_i = 0;
1323 ret = EINVAL;
1324 }
1325 break;
1326
1327 case FIOASYNC: /*set/clear async i/o */
1328 DEB( printf("FIOASYNC\n") ; )
1329 break;
1330
1331 case SNDCTL_DSP_NONBLOCK: /* set non-blocking i/o */
1332 case FIONBIO: /* set/clear non-blocking i/o */
1333 if (rdch) {
1334 CHN_LOCK(rdch);
1335 if (cmd == SNDCTL_DSP_NONBLOCK || *arg_i)
1336 rdch->flags |= CHN_F_NBIO;
1337 else
1338 rdch->flags &= ~CHN_F_NBIO;
1339 CHN_UNLOCK(rdch);
1340 }
1341 if (wrch) {
1342 CHN_LOCK(wrch);
1343 if (cmd == SNDCTL_DSP_NONBLOCK || *arg_i)
1344 wrch->flags |= CHN_F_NBIO;
1345 else
1346 wrch->flags &= ~CHN_F_NBIO;
1347 CHN_UNLOCK(wrch);
1348 }
1349 break;
1350
1351 /*
1352 * Finally, here is the linux-compatible ioctl interface
1353 */
1354 #define THE_REAL_SNDCTL_DSP_GETBLKSIZE _IOWR('P', 4, int)
1355 case THE_REAL_SNDCTL_DSP_GETBLKSIZE:
1356 case SNDCTL_DSP_GETBLKSIZE:
1357 chn = wrch ? wrch : rdch;
1358 if (chn) {
1359 CHN_LOCK(chn);
1360 *arg_i = sndbuf_getblksz(chn->bufsoft);
1361 CHN_UNLOCK(chn);
1362 } else {
1363 *arg_i = 0;
1364 ret = EINVAL;
1365 }
1366 break;
1367
1368 case SNDCTL_DSP_SETBLKSIZE:
1369 RANGE(*arg_i, 16, 65536);
1370 PCM_ACQUIRE_QUICK(d);
1371 if (wrch) {
1372 CHN_LOCK(wrch);
1373 chn_setblocksize(wrch, 2, *arg_i);
1374 CHN_UNLOCK(wrch);
1375 }
1376 if (rdch) {
1377 CHN_LOCK(rdch);
1378 chn_setblocksize(rdch, 2, *arg_i);
1379 CHN_UNLOCK(rdch);
1380 }
1381 PCM_RELEASE_QUICK(d);
1382 break;
1383
1384 case SNDCTL_DSP_RESET:
1385 DEB(printf("dsp reset\n"));
1386 if (wrch) {
1387 CHN_LOCK(wrch);
1388 chn_abort(wrch);
1389 chn_resetbuf(wrch);
1390 CHN_UNLOCK(wrch);
1391 }
1392 if (rdch) {
1393 CHN_LOCK(rdch);
1394 chn_abort(rdch);
1395 chn_resetbuf(rdch);
1396 CHN_UNLOCK(rdch);
1397 }
1398 break;
1399
1400 case SNDCTL_DSP_SYNC:
1401 DEB(printf("dsp sync\n"));
1402 /* chn_sync may sleep */
1403 if (wrch) {
1404 CHN_LOCK(wrch);
1405 chn_sync(wrch, 0);
1406 CHN_UNLOCK(wrch);
1407 }
1408 break;
1409
1410 case SNDCTL_DSP_SPEED:
1411 /* chn_setspeed may sleep */
1412 tmp = 0;
1413 PCM_ACQUIRE_QUICK(d);
1414 if (wrch) {
1415 CHN_LOCK(wrch);
1416 ret = chn_setspeed(wrch, *arg_i);
1417 tmp = wrch->speed;
1418 CHN_UNLOCK(wrch);
1419 }
1420 if (rdch && ret == 0) {
1421 CHN_LOCK(rdch);
1422 ret = chn_setspeed(rdch, *arg_i);
1423 if (tmp == 0)
1424 tmp = rdch->speed;
1425 CHN_UNLOCK(rdch);
1426 }
1427 PCM_RELEASE_QUICK(d);
1428 *arg_i = tmp;
1429 break;
1430
1431 case SOUND_PCM_READ_RATE:
1432 chn = wrch ? wrch : rdch;
1433 if (chn) {
1434 CHN_LOCK(chn);
1435 *arg_i = chn->speed;
1436 CHN_UNLOCK(chn);
1437 } else {
1438 *arg_i = 0;
1439 ret = EINVAL;
1440 }
1441 break;
1442
1443 case SNDCTL_DSP_STEREO:
1444 tmp = -1;
1445 *arg_i = (*arg_i)? 2 : 1;
1446 PCM_ACQUIRE_QUICK(d);
1447 if (wrch) {
1448 CHN_LOCK(wrch);
1449 ret = chn_setformat(wrch,
1450 SND_FORMAT(wrch->format, *arg_i, 0));
1451 tmp = (AFMT_CHANNEL(wrch->format) > 1)? 1 : 0;
1452 CHN_UNLOCK(wrch);
1453 }
1454 if (rdch && ret == 0) {
1455 CHN_LOCK(rdch);
1456 ret = chn_setformat(rdch,
1457 SND_FORMAT(rdch->format, *arg_i, 0));
1458 if (tmp == -1)
1459 tmp = (AFMT_CHANNEL(rdch->format) > 1)? 1 : 0;
1460 CHN_UNLOCK(rdch);
1461 }
1462 PCM_RELEASE_QUICK(d);
1463 *arg_i = tmp;
1464 break;
1465
1466 case SOUND_PCM_WRITE_CHANNELS:
1467 /* case SNDCTL_DSP_CHANNELS: ( == SOUND_PCM_WRITE_CHANNELS) */
1468 if (*arg_i < 0) {
1469 *arg_i = 0;
1470 ret = EINVAL;
1471 break;
1472 }
1473 if (*arg_i != 0) {
1474 struct pcmchan_matrix *m;
1475 uint32_t ext;
1476
1477 tmp = 0;
1478 if (*arg_i > SND_CHN_MAX)
1479 *arg_i = SND_CHN_MAX;
1480
1481 m = feeder_matrix_default_channel_map(*arg_i);
1482 if (m != NULL)
1483 ext = m->ext;
1484 else
1485 ext = 0;
1486
1487 PCM_ACQUIRE_QUICK(d);
1488 if (wrch) {
1489 CHN_LOCK(wrch);
1490 ret = chn_setformat(wrch,
1491 SND_FORMAT(wrch->format, *arg_i, ext));
1492 tmp = AFMT_CHANNEL(wrch->format);
1493 CHN_UNLOCK(wrch);
1494 }
1495 if (rdch && ret == 0) {
1496 CHN_LOCK(rdch);
1497 ret = chn_setformat(rdch,
1498 SND_FORMAT(rdch->format, *arg_i, ext));
1499 if (tmp == 0)
1500 tmp = AFMT_CHANNEL(rdch->format);
1501 CHN_UNLOCK(rdch);
1502 }
1503 PCM_RELEASE_QUICK(d);
1504 *arg_i = tmp;
1505 } else {
1506 chn = wrch ? wrch : rdch;
1507 CHN_LOCK(chn);
1508 *arg_i = AFMT_CHANNEL(chn->format);
1509 CHN_UNLOCK(chn);
1510 }
1511 break;
1512
1513 case SOUND_PCM_READ_CHANNELS:
1514 chn = wrch ? wrch : rdch;
1515 if (chn) {
1516 CHN_LOCK(chn);
1517 *arg_i = AFMT_CHANNEL(chn->format);
1518 CHN_UNLOCK(chn);
1519 } else {
1520 *arg_i = 0;
1521 ret = EINVAL;
1522 }
1523 break;
1524
1525 case SNDCTL_DSP_GETFMTS: /* returns a mask of supported fmts */
1526 chn = wrch ? wrch : rdch;
1527 if (chn) {
1528 CHN_LOCK(chn);
1529 *arg_i = chn_getformats(chn);
1530 CHN_UNLOCK(chn);
1531 } else {
1532 *arg_i = 0;
1533 ret = EINVAL;
1534 }
1535 break;
1536
1537 case SNDCTL_DSP_SETFMT: /* sets _one_ format */
1538 if (*arg_i != AFMT_QUERY) {
1539 tmp = 0;
1540 PCM_ACQUIRE_QUICK(d);
1541 if (wrch) {
1542 CHN_LOCK(wrch);
1543 ret = chn_setformat(wrch, SND_FORMAT(*arg_i,
1544 AFMT_CHANNEL(wrch->format),
1545 AFMT_EXTCHANNEL(wrch->format)));
1546 tmp = wrch->format;
1547 CHN_UNLOCK(wrch);
1548 }
1549 if (rdch && ret == 0) {
1550 CHN_LOCK(rdch);
1551 ret = chn_setformat(rdch, SND_FORMAT(*arg_i,
1552 AFMT_CHANNEL(rdch->format),
1553 AFMT_EXTCHANNEL(rdch->format)));
1554 if (tmp == 0)
1555 tmp = rdch->format;
1556 CHN_UNLOCK(rdch);
1557 }
1558 PCM_RELEASE_QUICK(d);
1559 *arg_i = AFMT_ENCODING(tmp);
1560 } else {
1561 chn = wrch ? wrch : rdch;
1562 CHN_LOCK(chn);
1563 *arg_i = AFMT_ENCODING(chn->format);
1564 CHN_UNLOCK(chn);
1565 }
1566 break;
1567
1568 case SNDCTL_DSP_SETFRAGMENT:
1569 DEB(printf("SNDCTL_DSP_SETFRAGMENT 0x%08x\n", *(int *)arg));
1570 {
1571 uint32_t fragln = (*arg_i) & 0x0000ffff;
1572 uint32_t maxfrags = ((*arg_i) & 0xffff0000) >> 16;
1573 uint32_t fragsz;
1574 uint32_t r_maxfrags, r_fragsz;
1575
1576 RANGE(fragln, 4, 16);
1577 fragsz = 1 << fragln;
1578
1579 if (maxfrags == 0)
1580 maxfrags = CHN_2NDBUFMAXSIZE / fragsz;
1581 if (maxfrags < 2)
1582 maxfrags = 2;
1583 if (maxfrags * fragsz > CHN_2NDBUFMAXSIZE)
1584 maxfrags = CHN_2NDBUFMAXSIZE / fragsz;
1585
1586 DEB(printf("SNDCTL_DSP_SETFRAGMENT %d frags, %d sz\n", maxfrags, fragsz));
1587 PCM_ACQUIRE_QUICK(d);
1588 if (rdch) {
1589 CHN_LOCK(rdch);
1590 ret = chn_setblocksize(rdch, maxfrags, fragsz);
1591 r_maxfrags = sndbuf_getblkcnt(rdch->bufsoft);
1592 r_fragsz = sndbuf_getblksz(rdch->bufsoft);
1593 CHN_UNLOCK(rdch);
1594 } else {
1595 r_maxfrags = maxfrags;
1596 r_fragsz = fragsz;
1597 }
1598 if (wrch && ret == 0) {
1599 CHN_LOCK(wrch);
1600 ret = chn_setblocksize(wrch, maxfrags, fragsz);
1601 maxfrags = sndbuf_getblkcnt(wrch->bufsoft);
1602 fragsz = sndbuf_getblksz(wrch->bufsoft);
1603 CHN_UNLOCK(wrch);
1604 } else { /* use whatever came from the read channel */
1605 maxfrags = r_maxfrags;
1606 fragsz = r_fragsz;
1607 }
1608 PCM_RELEASE_QUICK(d);
1609
1610 fragln = 0;
1611 while (fragsz > 1) {
1612 fragln++;
1613 fragsz >>= 1;
1614 }
1615 *arg_i = (maxfrags << 16) | fragln;
1616 }
1617 break;
1618
1619 case SNDCTL_DSP_GETISPACE:
1620 /* return the size of data available in the input queue */
1621 {
1622 audio_buf_info *a = (audio_buf_info *)arg;
1623 if (rdch) {
1624 struct snd_dbuf *bs = rdch->bufsoft;
1625
1626 CHN_LOCK(rdch);
1627 a->bytes = sndbuf_getready(bs);
1628 a->fragments = a->bytes / sndbuf_getblksz(bs);
1629 a->fragstotal = sndbuf_getblkcnt(bs);
1630 a->fragsize = sndbuf_getblksz(bs);
1631 CHN_UNLOCK(rdch);
1632 } else
1633 ret = EINVAL;
1634 }
1635 break;
1636
1637 case SNDCTL_DSP_GETOSPACE:
1638 /* return space available in the output queue */
1639 {
1640 audio_buf_info *a = (audio_buf_info *)arg;
1641 if (wrch) {
1642 struct snd_dbuf *bs = wrch->bufsoft;
1643
1644 CHN_LOCK(wrch);
1645 /* XXX abusive DMA update: chn_wrupdate(wrch); */
1646 a->bytes = sndbuf_getfree(bs);
1647 a->fragments = a->bytes / sndbuf_getblksz(bs);
1648 a->fragstotal = sndbuf_getblkcnt(bs);
1649 a->fragsize = sndbuf_getblksz(bs);
1650 CHN_UNLOCK(wrch);
1651 } else
1652 ret = EINVAL;
1653 }
1654 break;
1655
1656 case SNDCTL_DSP_GETIPTR:
1657 {
1658 count_info *a = (count_info *)arg;
1659 if (rdch) {
1660 struct snd_dbuf *bs = rdch->bufsoft;
1661
1662 CHN_LOCK(rdch);
1663 /* XXX abusive DMA update: chn_rdupdate(rdch); */
1664 a->bytes = sndbuf_gettotal(bs);
1665 a->blocks = sndbuf_getblocks(bs) - rdch->blocks;
1666 a->ptr = sndbuf_getfreeptr(bs);
1667 rdch->blocks = sndbuf_getblocks(bs);
1668 CHN_UNLOCK(rdch);
1669 } else
1670 ret = EINVAL;
1671 }
1672 break;
1673
1674 case SNDCTL_DSP_GETOPTR:
1675 {
1676 count_info *a = (count_info *)arg;
1677 if (wrch) {
1678 struct snd_dbuf *bs = wrch->bufsoft;
1679
1680 CHN_LOCK(wrch);
1681 /* XXX abusive DMA update: chn_wrupdate(wrch); */
1682 a->bytes = sndbuf_gettotal(bs);
1683 a->blocks = sndbuf_getblocks(bs) - wrch->blocks;
1684 a->ptr = sndbuf_getreadyptr(bs);
1685 wrch->blocks = sndbuf_getblocks(bs);
1686 CHN_UNLOCK(wrch);
1687 } else
1688 ret = EINVAL;
1689 }
1690 break;
1691
1692 case SNDCTL_DSP_GETCAPS:
1693 PCM_LOCK(d);
1694 *arg_i = PCM_CAP_REALTIME | PCM_CAP_MMAP | PCM_CAP_TRIGGER;
1695 if (rdch && wrch && !(dsp_get_flags(i_dev) & SD_F_SIMPLEX))
1696 *arg_i |= PCM_CAP_DUPLEX;
1697 PCM_UNLOCK(d);
1698 break;
1699
1700 case SOUND_PCM_READ_BITS:
1701 chn = wrch ? wrch : rdch;
1702 if (chn) {
1703 CHN_LOCK(chn);
1704 if (chn->format & AFMT_8BIT)
1705 *arg_i = 8;
1706 else if (chn->format & AFMT_16BIT)
1707 *arg_i = 16;
1708 else if (chn->format & AFMT_24BIT)
1709 *arg_i = 24;
1710 else if (chn->format & AFMT_32BIT)
1711 *arg_i = 32;
1712 else
1713 ret = EINVAL;
1714 CHN_UNLOCK(chn);
1715 } else {
1716 *arg_i = 0;
1717 ret = EINVAL;
1718 }
1719 break;
1720
1721 case SNDCTL_DSP_SETTRIGGER:
1722 if (rdch) {
1723 CHN_LOCK(rdch);
1724 rdch->flags &= ~CHN_F_NOTRIGGER;
1725 if (*arg_i & PCM_ENABLE_INPUT)
1726 chn_start(rdch, 1);
1727 else {
1728 chn_abort(rdch);
1729 chn_resetbuf(rdch);
1730 rdch->flags |= CHN_F_NOTRIGGER;
1731 }
1732 CHN_UNLOCK(rdch);
1733 }
1734 if (wrch) {
1735 CHN_LOCK(wrch);
1736 wrch->flags &= ~CHN_F_NOTRIGGER;
1737 if (*arg_i & PCM_ENABLE_OUTPUT)
1738 chn_start(wrch, 1);
1739 else {
1740 chn_abort(wrch);
1741 chn_resetbuf(wrch);
1742 wrch->flags |= CHN_F_NOTRIGGER;
1743 }
1744 CHN_UNLOCK(wrch);
1745 }
1746 break;
1747
1748 case SNDCTL_DSP_GETTRIGGER:
1749 *arg_i = 0;
1750 if (wrch) {
1751 CHN_LOCK(wrch);
1752 if (wrch->flags & CHN_F_TRIGGERED)
1753 *arg_i |= PCM_ENABLE_OUTPUT;
1754 CHN_UNLOCK(wrch);
1755 }
1756 if (rdch) {
1757 CHN_LOCK(rdch);
1758 if (rdch->flags & CHN_F_TRIGGERED)
1759 *arg_i |= PCM_ENABLE_INPUT;
1760 CHN_UNLOCK(rdch);
1761 }
1762 break;
1763
1764 case SNDCTL_DSP_GETODELAY:
1765 if (wrch) {
1766 struct snd_dbuf *bs = wrch->bufsoft;
1767
1768 CHN_LOCK(wrch);
1769 /* XXX abusive DMA update: chn_wrupdate(wrch); */
1770 *arg_i = sndbuf_getready(bs);
1771 CHN_UNLOCK(wrch);
1772 } else
1773 ret = EINVAL;
1774 break;
1775
1776 case SNDCTL_DSP_POST:
1777 if (wrch) {
1778 CHN_LOCK(wrch);
1779 wrch->flags &= ~CHN_F_NOTRIGGER;
1780 chn_start(wrch, 1);
1781 CHN_UNLOCK(wrch);
1782 }
1783 break;
1784
1785 case SNDCTL_DSP_SETDUPLEX:
1786 /*
1787 * switch to full-duplex mode if card is in half-duplex
1788 * mode and is able to work in full-duplex mode
1789 */
1790 PCM_LOCK(d);
1791 if (rdch && wrch && (dsp_get_flags(i_dev) & SD_F_SIMPLEX))
1792 dsp_set_flags(i_dev, dsp_get_flags(i_dev)^SD_F_SIMPLEX);
1793 PCM_UNLOCK(d);
1794 break;
1795
1796 /*
1797 * The following four ioctls are simple wrappers around mixer_ioctl
1798 * with no further processing. xcmd is short for "translated
1799 * command".
1800 */
1801 case SNDCTL_DSP_GETRECVOL:
1802 if (xcmd == 0) {
1803 xcmd = SOUND_MIXER_READ_RECLEV;
1804 chn = rdch;
1805 }
1806 /* FALLTHROUGH */
1807 case SNDCTL_DSP_SETRECVOL:
1808 if (xcmd == 0) {
1809 xcmd = SOUND_MIXER_WRITE_RECLEV;
1810 chn = rdch;
1811 }
1812 /* FALLTHROUGH */
1813 case SNDCTL_DSP_GETPLAYVOL:
1814 if (xcmd == 0) {
1815 xcmd = SOUND_MIXER_READ_PCM;
1816 chn = wrch;
1817 }
1818 /* FALLTHROUGH */
1819 case SNDCTL_DSP_SETPLAYVOL:
1820 if (xcmd == 0) {
1821 xcmd = SOUND_MIXER_WRITE_PCM;
1822 chn = wrch;
1823 }
1824
1825 ret = dsp_ioctl_channel(i_dev, chn, xcmd, arg);
1826 if (ret != -1) {
1827 PCM_GIANT_EXIT(d);
1828 return (ret);
1829 }
1830
1831 if (d->mixer_dev != NULL) {
1832 PCM_ACQUIRE_QUICK(d);
1833 ret = mixer_ioctl_cmd(d->mixer_dev, xcmd, arg, -1, td,
1834 MIXER_CMD_DIRECT);
1835 PCM_RELEASE_QUICK(d);
1836 } else
1837 ret = ENOTSUP;
1838
1839 break;
1840
1841 case SNDCTL_DSP_GET_RECSRC_NAMES:
1842 case SNDCTL_DSP_GET_RECSRC:
1843 case SNDCTL_DSP_SET_RECSRC:
1844 if (d->mixer_dev != NULL) {
1845 PCM_ACQUIRE_QUICK(d);
1846 ret = mixer_ioctl_cmd(d->mixer_dev, cmd, arg, -1, td,
1847 MIXER_CMD_DIRECT);
1848 PCM_RELEASE_QUICK(d);
1849 } else
1850 ret = ENOTSUP;
1851 break;
1852
1853 /*
1854 * The following 3 ioctls aren't very useful at the moment. For
1855 * now, only a single channel is associated with a cdev (/dev/dspN
1856 * instance), so there's only a single output routing to use (i.e.,
1857 * the wrch bound to this cdev).
1858 */
1859 case SNDCTL_DSP_GET_PLAYTGT_NAMES:
1860 {
1861 oss_mixer_enuminfo *ei;
1862 ei = (oss_mixer_enuminfo *)arg;
1863 ei->dev = 0;
1864 ei->ctrl = 0;
1865 ei->version = 0; /* static for now */
1866 ei->strindex[0] = 0;
1867
1868 if (wrch != NULL) {
1869 ei->nvalues = 1;
1870 strlcpy(ei->strings, wrch->name,
1871 sizeof(ei->strings));
1872 } else {
1873 ei->nvalues = 0;
1874 ei->strings[0] = '\0';
1875 }
1876 }
1877 break;
1878 case SNDCTL_DSP_GET_PLAYTGT:
1879 case SNDCTL_DSP_SET_PLAYTGT: /* yes, they are the same for now */
1880 /*
1881 * Re: SET_PLAYTGT
1882 * OSSv4: "The value that was accepted by the device will
1883 * be returned back in the variable pointed by the
1884 * argument."
1885 */
1886 if (wrch != NULL)
1887 *arg_i = 0;
1888 else
1889 ret = EINVAL;
1890 break;
1891
1892 case SNDCTL_DSP_SILENCE:
1893 /*
1894 * Flush the software (pre-feed) buffer, but try to minimize playback
1895 * interruption. (I.e., record unplayed samples with intent to
1896 * restore by SNDCTL_DSP_SKIP.) Intended for application "pause"
1897 * functionality.
1898 */
1899 if (wrch == NULL)
1900 ret = EINVAL;
1901 else {
1902 struct snd_dbuf *bs;
1903 CHN_LOCK(wrch);
1904 while (wrch->inprog != 0)
1905 cv_wait(&wrch->cv, wrch->lock);
1906 bs = wrch->bufsoft;
1907 if ((bs->shadbuf != NULL) && (sndbuf_getready(bs) > 0)) {
1908 bs->sl = sndbuf_getready(bs);
1909 sndbuf_dispose(bs, bs->shadbuf, sndbuf_getready(bs));
1910 sndbuf_fillsilence(bs);
1911 chn_start(wrch, 0);
1912 }
1913 CHN_UNLOCK(wrch);
1914 }
1915 break;
1916
1917 case SNDCTL_DSP_SKIP:
1918 /*
1919 * OSSv4 docs: "This ioctl call discards all unplayed samples in the
1920 * playback buffer by moving the current write position immediately
1921 * before the point where the device is currently reading the samples."
1922 */
1923 if (wrch == NULL)
1924 ret = EINVAL;
1925 else {
1926 struct snd_dbuf *bs;
1927 CHN_LOCK(wrch);
1928 while (wrch->inprog != 0)
1929 cv_wait(&wrch->cv, wrch->lock);
1930 bs = wrch->bufsoft;
1931 if ((bs->shadbuf != NULL) && (bs->sl > 0)) {
1932 sndbuf_softreset(bs);
1933 sndbuf_acquire(bs, bs->shadbuf, bs->sl);
1934 bs->sl = 0;
1935 chn_start(wrch, 0);
1936 }
1937 CHN_UNLOCK(wrch);
1938 }
1939 break;
1940
1941 case SNDCTL_DSP_CURRENT_OPTR:
1942 case SNDCTL_DSP_CURRENT_IPTR:
1943 /**
1944 * @note Changing formats resets the buffer counters, which differs
1945 * from the 4Front drivers. However, I don't expect this to be
1946 * much of a problem.
1947 *
1948 * @note In a test where @c CURRENT_OPTR is called immediately after write
1949 * returns, this driver is about 32K samples behind whereas
1950 * 4Front's is about 8K samples behind. Should determine source
1951 * of discrepancy, even if only out of curiosity.
1952 *
1953 * @todo Actually test SNDCTL_DSP_CURRENT_IPTR.
1954 */
1955 chn = (cmd == SNDCTL_DSP_CURRENT_OPTR) ? wrch : rdch;
1956 if (chn == NULL)
1957 ret = EINVAL;
1958 else {
1959 struct snd_dbuf *bs;
1960 /* int tmp; */
1961
1962 oss_count_t *oc = (oss_count_t *)arg;
1963
1964 CHN_LOCK(chn);
1965 bs = chn->bufsoft;
1966 #if 0
1967 tmp = (sndbuf_getsize(b) + chn_getptr(chn) - sndbuf_gethwptr(b)) % sndbuf_getsize(b);
1968 oc->samples = (sndbuf_gettotal(b) + tmp) / sndbuf_getalign(b);
1969 oc->fifo_samples = (sndbuf_getready(b) - tmp) / sndbuf_getalign(b);
1970 #else
1971 oc->samples = sndbuf_gettotal(bs) / sndbuf_getalign(bs);
1972 oc->fifo_samples = sndbuf_getready(bs) / sndbuf_getalign(bs);
1973 #endif
1974 CHN_UNLOCK(chn);
1975 }
1976 break;
1977
1978 case SNDCTL_DSP_HALT_OUTPUT:
1979 case SNDCTL_DSP_HALT_INPUT:
1980 chn = (cmd == SNDCTL_DSP_HALT_OUTPUT) ? wrch : rdch;
1981 if (chn == NULL)
1982 ret = EINVAL;
1983 else {
1984 CHN_LOCK(chn);
1985 chn_abort(chn);
1986 CHN_UNLOCK(chn);
1987 }
1988 break;
1989
1990 case SNDCTL_DSP_LOW_WATER:
1991 /*
1992 * Set the number of bytes required to attract attention by
1993 * select/poll.
1994 */
1995 if (wrch != NULL) {
1996 CHN_LOCK(wrch);
1997 wrch->lw = (*arg_i > 1) ? *arg_i : 1;
1998 CHN_UNLOCK(wrch);
1999 }
2000 if (rdch != NULL) {
2001 CHN_LOCK(rdch);
2002 rdch->lw = (*arg_i > 1) ? *arg_i : 1;
2003 CHN_UNLOCK(rdch);
2004 }
2005 break;
2006
2007 case SNDCTL_DSP_GETERROR:
2008 /*
2009 * OSSv4 docs: "All errors and counters will automatically be
2010 * cleared to zeroes after the call so each call will return only
2011 * the errors that occurred after the previous invocation. ... The
2012 * play_underruns and rec_overrun fields are the only usefull fields
2013 * returned by OSS 4.0."
2014 */
2015 {
2016 audio_errinfo *ei = (audio_errinfo *)arg;
2017
2018 bzero((void *)ei, sizeof(*ei));
2019
2020 if (wrch != NULL) {
2021 CHN_LOCK(wrch);
2022 ei->play_underruns = wrch->xruns;
2023 wrch->xruns = 0;
2024 CHN_UNLOCK(wrch);
2025 }
2026 if (rdch != NULL) {
2027 CHN_LOCK(rdch);
2028 ei->rec_overruns = rdch->xruns;
2029 rdch->xruns = 0;
2030 CHN_UNLOCK(rdch);
2031 }
2032 }
2033 break;
2034
2035 case SNDCTL_DSP_SYNCGROUP:
2036 PCM_ACQUIRE_QUICK(d);
2037 ret = dsp_oss_syncgroup(wrch, rdch, (oss_syncgroup *)arg);
2038 PCM_RELEASE_QUICK(d);
2039 break;
2040
2041 case SNDCTL_DSP_SYNCSTART:
2042 PCM_ACQUIRE_QUICK(d);
2043 ret = dsp_oss_syncstart(*arg_i);
2044 PCM_RELEASE_QUICK(d);
2045 break;
2046
2047 case SNDCTL_DSP_POLICY:
2048 PCM_ACQUIRE_QUICK(d);
2049 ret = dsp_oss_policy(wrch, rdch, *arg_i);
2050 PCM_RELEASE_QUICK(d);
2051 break;
2052
2053 case SNDCTL_DSP_COOKEDMODE:
2054 PCM_ACQUIRE_QUICK(d);
2055 if (!(dsp_get_flags(i_dev) & SD_F_BITPERFECT))
2056 ret = dsp_oss_cookedmode(wrch, rdch, *arg_i);
2057 PCM_RELEASE_QUICK(d);
2058 break;
2059 case SNDCTL_DSP_GET_CHNORDER:
2060 PCM_ACQUIRE_QUICK(d);
2061 ret = dsp_oss_getchnorder(wrch, rdch, (unsigned long long *)arg);
2062 PCM_RELEASE_QUICK(d);
2063 break;
2064 case SNDCTL_DSP_SET_CHNORDER:
2065 PCM_ACQUIRE_QUICK(d);
2066 ret = dsp_oss_setchnorder(wrch, rdch, (unsigned long long *)arg);
2067 PCM_RELEASE_QUICK(d);
2068 break;
2069 case SNDCTL_DSP_GETCHANNELMASK: /* XXX vlc */
2070 PCM_ACQUIRE_QUICK(d);
2071 ret = dsp_oss_getchannelmask(wrch, rdch, (int *)arg);
2072 PCM_RELEASE_QUICK(d);
2073 break;
2074 case SNDCTL_DSP_BIND_CHANNEL: /* XXX what?!? */
2075 ret = EINVAL;
2076 break;
2077 #ifdef OSSV4_EXPERIMENT
2078 /*
2079 * XXX The following ioctls are not yet supported and just return
2080 * EINVAL.
2081 */
2082 case SNDCTL_DSP_GETOPEAKS:
2083 case SNDCTL_DSP_GETIPEAKS:
2084 chn = (cmd == SNDCTL_DSP_GETOPEAKS) ? wrch : rdch;
2085 if (chn == NULL)
2086 ret = EINVAL;
2087 else {
2088 oss_peaks_t *op = (oss_peaks_t *)arg;
2089 int lpeak, rpeak;
2090
2091 CHN_LOCK(chn);
2092 ret = chn_getpeaks(chn, &lpeak, &rpeak);
2093 if (ret == -1)
2094 ret = EINVAL;
2095 else {
2096 (*op)[0] = lpeak;
2097 (*op)[1] = rpeak;
2098 }
2099 CHN_UNLOCK(chn);
2100 }
2101 break;
2102
2103 /*
2104 * XXX Once implemented, revisit this for proper cv protection
2105 * (if necessary).
2106 */
2107 case SNDCTL_GETLABEL:
2108 ret = dsp_oss_getlabel(wrch, rdch, (oss_label_t *)arg);
2109 break;
2110 case SNDCTL_SETLABEL:
2111 ret = dsp_oss_setlabel(wrch, rdch, (oss_label_t *)arg);
2112 break;
2113 case SNDCTL_GETSONG:
2114 ret = dsp_oss_getsong(wrch, rdch, (oss_longname_t *)arg);
2115 break;
2116 case SNDCTL_SETSONG:
2117 ret = dsp_oss_setsong(wrch, rdch, (oss_longname_t *)arg);
2118 break;
2119 case SNDCTL_SETNAME:
2120 ret = dsp_oss_setname(wrch, rdch, (oss_longname_t *)arg);
2121 break;
2122 #if 0
2123 /**
2124 * @note The S/PDIF interface ioctls, @c SNDCTL_DSP_READCTL and
2125 * @c SNDCTL_DSP_WRITECTL have been omitted at the suggestion of
2126 * 4Front Technologies.
2127 */
2128 case SNDCTL_DSP_READCTL:
2129 case SNDCTL_DSP_WRITECTL:
2130 ret = EINVAL;
2131 break;
2132 #endif /* !0 (explicitly omitted ioctls) */
2133
2134 #endif /* !OSSV4_EXPERIMENT */
2135 case SNDCTL_DSP_MAPINBUF:
2136 case SNDCTL_DSP_MAPOUTBUF:
2137 case SNDCTL_DSP_SETSYNCRO:
2138 /* undocumented */
2139
2140 case SNDCTL_DSP_SUBDIVIDE:
2141 case SOUND_PCM_WRITE_FILTER:
2142 case SOUND_PCM_READ_FILTER:
2143 /* dunno what these do, don't sound important */
2144
2145 default:
2146 DEB(printf("default ioctl fn 0x%08lx fail\n", cmd));
2147 ret = EINVAL;
2148 break;
2149 }
2150
2151 PCM_GIANT_LEAVE(d);
2152
2153 return (ret);
2154 }
2155
2156 static int
2157 dsp_poll(struct cdev *i_dev, int events, struct thread *td)
2158 {
2159 struct snddev_info *d;
2160 struct pcm_channel *wrch, *rdch;
2161 int ret, e;
2162
2163 d = dsp_get_info(i_dev);
2164 if (!DSP_REGISTERED(d, i_dev))
2165 return (EBADF);
2166
2167 PCM_GIANT_ENTER(d);
2168
2169 wrch = NULL;
2170 rdch = NULL;
2171 ret = 0;
2172
2173 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
2174
2175 if (wrch != NULL && !(wrch->flags & CHN_F_DEAD)) {
2176 e = (events & (POLLOUT | POLLWRNORM));
2177 if (e)
2178 ret |= chn_poll(wrch, e, td);
2179 }
2180
2181 if (rdch != NULL && !(rdch->flags & CHN_F_DEAD)) {
2182 e = (events & (POLLIN | POLLRDNORM));
2183 if (e)
2184 ret |= chn_poll(rdch, e, td);
2185 }
2186
2187 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
2188
2189 PCM_GIANT_LEAVE(d);
2190
2191 return (ret);
2192 }
2193
2194 static int
2195 dsp_mmap(struct cdev *i_dev, vm_offset_t offset, vm_paddr_t *paddr, int nprot)
2196 {
2197
2198 /* XXX memattr is not honored */
2199 *paddr = vtophys(offset);
2200 return (0);
2201 }
2202
2203 static int
2204 dsp_mmap_single(struct cdev *i_dev, vm_ooffset_t *offset,
2205 vm_size_t size, struct vm_object **object, int nprot)
2206 {
2207 struct snddev_info *d;
2208 struct pcm_channel *wrch, *rdch, *c;
2209
2210 /*
2211 * Reject PROT_EXEC by default. It just doesn't makes sense.
2212 * Unfortunately, we have to give up this one due to linux_mmap
2213 * changes.
2214 *
2215 * http://lists.freebsd.org/pipermail/freebsd-emulation/2007-June/003698.html
2216 *
2217 */
2218 #ifdef SV_ABI_LINUX
2219 if ((nprot & PROT_EXEC) && (dsp_mmap_allow_prot_exec < 0 ||
2220 (dsp_mmap_allow_prot_exec == 0 &&
2221 SV_CURPROC_ABI() != SV_ABI_LINUX)))
2222 #else
2223 if ((nprot & PROT_EXEC) && dsp_mmap_allow_prot_exec < 1)
2224 #endif
2225 return (EINVAL);
2226
2227 /*
2228 * PROT_READ (alone) selects the input buffer.
2229 * PROT_WRITE (alone) selects the output buffer.
2230 * PROT_WRITE|PROT_READ together select the output buffer.
2231 */
2232 if ((nprot & (PROT_READ | PROT_WRITE)) == 0)
2233 return (EINVAL);
2234
2235 d = dsp_get_info(i_dev);
2236 if (!DSP_REGISTERED(d, i_dev))
2237 return (EINVAL);
2238
2239 PCM_GIANT_ENTER(d);
2240
2241 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
2242
2243 c = ((nprot & PROT_WRITE) != 0) ? wrch : rdch;
2244 if (c == NULL || (c->flags & CHN_F_MMAP_INVALID) ||
2245 (*offset + size) > sndbuf_getsize(c->bufsoft) ||
2246 (wrch != NULL && (wrch->flags & CHN_F_MMAP_INVALID)) ||
2247 (rdch != NULL && (rdch->flags & CHN_F_MMAP_INVALID))) {
2248 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
2249 PCM_GIANT_EXIT(d);
2250 return (EINVAL);
2251 }
2252
2253 if (wrch != NULL)
2254 wrch->flags |= CHN_F_MMAP;
2255 if (rdch != NULL)
2256 rdch->flags |= CHN_F_MMAP;
2257
2258 *offset = (uintptr_t)sndbuf_getbufofs(c->bufsoft, *offset);
2259 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
2260 *object = vm_pager_allocate(OBJT_DEVICE, i_dev,
2261 size, nprot, *offset, curthread->td_ucred);
2262
2263 PCM_GIANT_LEAVE(d);
2264
2265 if (*object == NULL)
2266 return (EINVAL);
2267 return (0);
2268 }
2269
2270 /* So much for dev_stdclone() */
2271 static int
2272 dsp_stdclone(char *name, char *namep, char *sep, int use_sep, int *u, int *c)
2273 {
2274 size_t len;
2275
2276 len = strlen(namep);
2277
2278 if (bcmp(name, namep, len) != 0)
2279 return (ENODEV);
2280
2281 name += len;
2282
2283 if (isdigit(*name) == 0)
2284 return (ENODEV);
2285
2286 len = strlen(sep);
2287
2288 if (*name == '' && !(name[1] == '\0' || bcmp(name + 1, sep, len) == 0))
2289 return (ENODEV);
2290
2291 for (*u = 0; isdigit(*name) != 0; name++) {
2292 *u *= 10;
2293 *u += *name - '';
2294 if (*u > dsp_umax)
2295 return (ENODEV);
2296 }
2297
2298 if (*name == '\0')
2299 return ((use_sep == 0) ? 0 : ENODEV);
2300
2301 if (bcmp(name, sep, len) != 0 || isdigit(name[len]) == 0)
2302 return (ENODEV);
2303
2304 name += len;
2305
2306 if (*name == '' && name[1] != '\0')
2307 return (ENODEV);
2308
2309 for (*c = 0; isdigit(*name) != 0; name++) {
2310 *c *= 10;
2311 *c += *name - '';
2312 if (*c > dsp_cmax)
2313 return (ENODEV);
2314 }
2315
2316 if (*name != '\0')
2317 return (ENODEV);
2318
2319 return (0);
2320 }
2321
2322 static void
2323 dsp_clone(void *arg,
2324 #if __FreeBSD_version >= 600034
2325 struct ucred *cred,
2326 #endif
2327 char *name, int namelen, struct cdev **dev)
2328 {
2329 struct snddev_info *d;
2330 struct snd_clone_entry *ce;
2331 struct pcm_channel *c;
2332 int i, unit, udcmask, cunit, devtype, devhw, devcmax, tumax;
2333 char *devname, *devcmp, *devsep;
2334
2335 KASSERT(dsp_umax >= 0 && dsp_cmax >= 0, ("Uninitialized unit!"));
2336
2337 if (*dev != NULL)
2338 return;
2339
2340 unit = -1;
2341 cunit = -1;
2342 devtype = -1;
2343 devhw = 0;
2344 devcmax = -1;
2345 tumax = -1;
2346 devname = NULL;
2347 devsep = NULL;
2348
2349 for (i = 0; unit == -1 &&
2350 i < (sizeof(dsp_cdevs) / sizeof(dsp_cdevs[0])); i++) {
2351 devtype = dsp_cdevs[i].type;
2352 devcmp = dsp_cdevs[i].name;
2353 devsep = dsp_cdevs[i].sep;
2354 devname = dsp_cdevs[i].alias;
2355 if (devname == NULL)
2356 devname = devcmp;
2357 devhw = dsp_cdevs[i].hw;
2358 devcmax = dsp_cdevs[i].max - 1;
2359 if (strcmp(name, devcmp) == 0)
2360 unit = snd_unit;
2361 else if (dsp_stdclone(name, devcmp, devsep,
2362 dsp_cdevs[i].use_sep, &unit, &cunit) != 0) {
2363 unit = -1;
2364 cunit = -1;
2365 }
2366 }
2367
2368 d = devclass_get_softc(pcm_devclass, unit);
2369 if (!PCM_REGISTERED(d) || d->clones == NULL)
2370 return;
2371
2372 /* XXX Need Giant magic entry ??? */
2373
2374 PCM_LOCK(d);
2375 if (snd_clone_disabled(d->clones)) {
2376 PCM_UNLOCK(d);
2377 return;
2378 }
2379
2380 PCM_WAIT(d);
2381 PCM_ACQUIRE(d);
2382 PCM_UNLOCK(d);
2383
2384 udcmask = snd_u2unit(unit) | snd_d2unit(devtype);
2385
2386 if (devhw != 0) {
2387 KASSERT(devcmax <= dsp_cmax,
2388 ("overflow: devcmax=%d, dsp_cmax=%d", devcmax, dsp_cmax));
2389 if (cunit > devcmax) {
2390 PCM_RELEASE_QUICK(d);
2391 return;
2392 }
2393 udcmask |= snd_c2unit(cunit);
2394 CHN_FOREACH(c, d, channels.pcm) {
2395 CHN_LOCK(c);
2396 if (c->unit != udcmask) {
2397 CHN_UNLOCK(c);
2398 continue;
2399 }
2400 CHN_UNLOCK(c);
2401 udcmask &= ~snd_c2unit(cunit);
2402 /*
2403 * Temporarily increase clone maxunit to overcome
2404 * vchan flexibility.
2405 *
2406 * # sysctl dev.pcm.0.play.vchans=256
2407 * dev.pcm.0.play.vchans: 1 -> 256
2408 * # cat /dev/zero > /dev/dsp0.vp255 &
2409 * [1] 17296
2410 * # sysctl dev.pcm.0.play.vchans=0
2411 * dev.pcm.0.play.vchans: 256 -> 1
2412 * # fg
2413 * [1] + running cat /dev/zero > /dev/dsp0.vp255
2414 * ^C
2415 * # cat /dev/zero > /dev/dsp0.vp255
2416 * zsh: operation not supported: /dev/dsp0.vp255
2417 */
2418 tumax = snd_clone_getmaxunit(d->clones);
2419 if (cunit > tumax)
2420 snd_clone_setmaxunit(d->clones, cunit);
2421 else
2422 tumax = -1;
2423 goto dsp_clone_alloc;
2424 }
2425 /*
2426 * Ok, so we're requesting unallocated vchan, but still
2427 * within maximum vchan limit.
2428 */
2429 if (((devtype == SND_DEV_DSPHW_VPLAY && d->pvchancount > 0) ||
2430 (devtype == SND_DEV_DSPHW_VREC && d->rvchancount > 0)) &&
2431 cunit < snd_maxautovchans) {
2432 udcmask &= ~snd_c2unit(cunit);
2433 tumax = snd_clone_getmaxunit(d->clones);
2434 if (cunit > tumax)
2435 snd_clone_setmaxunit(d->clones, cunit);
2436 else
2437 tumax = -1;
2438 goto dsp_clone_alloc;
2439 }
2440 PCM_RELEASE_QUICK(d);
2441 return;
2442 }
2443
2444 dsp_clone_alloc:
2445 ce = snd_clone_alloc(d->clones, dev, &cunit, udcmask);
2446 if (tumax != -1)
2447 snd_clone_setmaxunit(d->clones, tumax);
2448 if (ce != NULL) {
2449 udcmask |= snd_c2unit(cunit);
2450 *dev = make_dev(&dsp_cdevsw, PCMMINOR(udcmask),
2451 UID_ROOT, GID_WHEEL, 0666, "%s%d%s%d",
2452 devname, unit, devsep, cunit);
2453 snd_clone_register(ce, *dev);
2454 }
2455
2456 PCM_RELEASE_QUICK(d);
2457
2458 if (*dev != NULL)
2459 dev_ref(*dev);
2460 }
2461
2462 static void
2463 dsp_sysinit(void *p)
2464 {
2465 if (dsp_ehtag != NULL)
2466 return;
2467 /* initialize unit numbering */
2468 snd_unit_init();
2469 dsp_umax = PCMMAXUNIT;
2470 dsp_cmax = PCMMAXCHAN;
2471 dsp_ehtag = EVENTHANDLER_REGISTER(dev_clone, dsp_clone, 0, 1000);
2472 }
2473
2474 static void
2475 dsp_sysuninit(void *p)
2476 {
2477 if (dsp_ehtag == NULL)
2478 return;
2479 EVENTHANDLER_DEREGISTER(dev_clone, dsp_ehtag);
2480 dsp_ehtag = NULL;
2481 }
2482
2483 SYSINIT(dsp_sysinit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysinit, NULL);
2484 SYSUNINIT(dsp_sysuninit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysuninit, NULL);
2485
2486 char *
2487 dsp_unit2name(char *buf, size_t len, int unit)
2488 {
2489 int i, dtype;
2490
2491 KASSERT(buf != NULL && len != 0,
2492 ("bogus buf=%p len=%ju", buf, (uintmax_t)len));
2493
2494 dtype = snd_unit2d(unit);
2495
2496 for (i = 0; i < (sizeof(dsp_cdevs) / sizeof(dsp_cdevs[0])); i++) {
2497 if (dtype != dsp_cdevs[i].type || dsp_cdevs[i].alias != NULL)
2498 continue;
2499 snprintf(buf, len, "%s%d%s%d", dsp_cdevs[i].name,
2500 snd_unit2u(unit), dsp_cdevs[i].sep, snd_unit2c(unit));
2501 return (buf);
2502 }
2503
2504 return (NULL);
2505 }
2506
2507 /**
2508 * @brief Handler for SNDCTL_AUDIOINFO.
2509 *
2510 * Gathers information about the audio device specified in ai->dev. If
2511 * ai->dev == -1, then this function gathers information about the current
2512 * device. If the call comes in on a non-audio device and ai->dev == -1,
2513 * return EINVAL.
2514 *
2515 * This routine is supposed to go practically straight to the hardware,
2516 * getting capabilities directly from the sound card driver, side-stepping
2517 * the intermediate channel interface.
2518 *
2519 * Note, however, that the usefulness of this command is significantly
2520 * decreased when requesting info about any device other than the one serving
2521 * the request. While each snddev_channel refers to a specific device node,
2522 * the converse is *not* true. Currently, when a sound device node is opened,
2523 * the sound subsystem scans for an available audio channel (or channels, if
2524 * opened in read+write) and then assigns them to the si_drv[12] private
2525 * data fields. As a result, any information returned linking a channel to
2526 * a specific character device isn't necessarily accurate.
2527 *
2528 * @note
2529 * Calling threads must not hold any snddev_info or pcm_channel locks.
2530 *
2531 * @param dev device on which the ioctl was issued
2532 * @param ai ioctl request data container
2533 *
2534 * @retval 0 success
2535 * @retval EINVAL ai->dev specifies an invalid device
2536 *
2537 * @todo Verify correctness of Doxygen tags. ;)
2538 */
2539 int
2540 dsp_oss_audioinfo(struct cdev *i_dev, oss_audioinfo *ai)
2541 {
2542 struct pcmchan_caps *caps;
2543 struct pcm_channel *ch;
2544 struct snddev_info *d;
2545 uint32_t fmts;
2546 int i, nchan, *rates, minch, maxch;
2547 char *devname, buf[CHN_NAMELEN];
2548
2549 /*
2550 * If probing the device that received the ioctl, make sure it's a
2551 * DSP device. (Users may use this ioctl with /dev/mixer and
2552 * /dev/midi.)
2553 */
2554 if (ai->dev == -1 && i_dev->si_devsw != &dsp_cdevsw)
2555 return (EINVAL);
2556
2557 ch = NULL;
2558 devname = NULL;
2559 nchan = 0;
2560 bzero(buf, sizeof(buf));
2561
2562 /*
2563 * Search for the requested audio device (channel). Start by
2564 * iterating over pcm devices.
2565 */
2566 for (i = 0; pcm_devclass != NULL &&
2567 i < devclass_get_maxunit(pcm_devclass); i++) {
2568 d = devclass_get_softc(pcm_devclass, i);
2569 if (!PCM_REGISTERED(d))
2570 continue;
2571
2572 /* XXX Need Giant magic entry ??? */
2573
2574 /* See the note in function docblock */
2575 PCM_UNLOCKASSERT(d);
2576 PCM_LOCK(d);
2577
2578 CHN_FOREACH(ch, d, channels.pcm) {
2579 CHN_UNLOCKASSERT(ch);
2580 CHN_LOCK(ch);
2581 if (ai->dev == -1) {
2582 if (DSP_REGISTERED(d, i_dev) &&
2583 (ch == PCM_RDCH(i_dev) || /* record ch */
2584 ch == PCM_WRCH(i_dev))) { /* playback ch */
2585 devname = dsp_unit2name(buf,
2586 sizeof(buf), ch->unit);
2587 }
2588 } else if (ai->dev == nchan) {
2589 devname = dsp_unit2name(buf, sizeof(buf),
2590 ch->unit);
2591 }
2592 if (devname != NULL)
2593 break;
2594 CHN_UNLOCK(ch);
2595 ++nchan;
2596 }
2597
2598 if (devname != NULL) {
2599 /*
2600 * At this point, the following synchronization stuff
2601 * has happened:
2602 * - a specific PCM device is locked.
2603 * - a specific audio channel has been locked, so be
2604 * sure to unlock when exiting;
2605 */
2606
2607 caps = chn_getcaps(ch);
2608
2609 /*
2610 * With all handles collected, zero out the user's
2611 * container and begin filling in its fields.
2612 */
2613 bzero((void *)ai, sizeof(oss_audioinfo));
2614
2615 ai->dev = nchan;
2616 strlcpy(ai->name, ch->name, sizeof(ai->name));
2617
2618 if ((ch->flags & CHN_F_BUSY) == 0)
2619 ai->busy = 0;
2620 else
2621 ai->busy = (ch->direction == PCMDIR_PLAY) ? OPEN_WRITE : OPEN_READ;
2622
2623 /**
2624 * @note
2625 * @c cmd - OSSv4 docs: "Only supported under Linux at
2626 * this moment." Cop-out, I know, but I'll save
2627 * running around in the process table for later.
2628 * Is there a risk of leaking information?
2629 */
2630 ai->pid = ch->pid;
2631
2632 /*
2633 * These flags stolen from SNDCTL_DSP_GETCAPS handler.
2634 * Note, however, that a single channel operates in
2635 * only one direction, so PCM_CAP_DUPLEX is out.
2636 */
2637 /**
2638 * @todo @c SNDCTL_AUDIOINFO::caps - Make drivers keep
2639 * these in pcmchan::caps?
2640 */
2641 ai->caps = PCM_CAP_REALTIME | PCM_CAP_MMAP | PCM_CAP_TRIGGER |
2642 ((ch->direction == PCMDIR_PLAY) ? PCM_CAP_OUTPUT : PCM_CAP_INPUT);
2643
2644 /*
2645 * Collect formats supported @b natively by the
2646 * device. Also determine min/max channels. (I.e.,
2647 * mono, stereo, or both?)
2648 *
2649 * If any channel is stereo, maxch = 2;
2650 * if all channels are stereo, minch = 2, too;
2651 * if any channel is mono, minch = 1;
2652 * and if all channels are mono, maxch = 1.
2653 */
2654 minch = 0;
2655 maxch = 0;
2656 fmts = 0;
2657 for (i = 0; caps->fmtlist[i]; i++) {
2658 fmts |= caps->fmtlist[i];
2659 if (AFMT_CHANNEL(caps->fmtlist[i]) > 1) {
2660 minch = (minch == 0) ? 2 : minch;
2661 maxch = 2;
2662 } else {
2663 minch = 1;
2664 maxch = (maxch == 0) ? 1 : maxch;
2665 }
2666 }
2667
2668 if (ch->direction == PCMDIR_PLAY)
2669 ai->oformats = fmts;
2670 else
2671 ai->iformats = fmts;
2672
2673 /**
2674 * @note
2675 * @c magic - OSSv4 docs: "Reserved for internal use
2676 * by OSS."
2677 *
2678 * @par
2679 * @c card_number - OSSv4 docs: "Number of the sound
2680 * card where this device belongs or -1 if this
2681 * information is not available. Applications
2682 * should normally not use this field for any
2683 * purpose."
2684 */
2685 ai->card_number = -1;
2686 /**
2687 * @todo @c song_name - depends first on
2688 * SNDCTL_[GS]ETSONG @todo @c label - depends
2689 * on SNDCTL_[GS]ETLABEL
2690 * @todo @c port_number - routing information?
2691 */
2692 ai->port_number = -1;
2693 ai->mixer_dev = (d->mixer_dev != NULL) ? PCMUNIT(d->mixer_dev) : -1;
2694 /**
2695 * @note
2696 * @c real_device - OSSv4 docs: "Obsolete."
2697 */
2698 ai->real_device = -1;
2699 strlcpy(ai->devnode, "/dev/", sizeof(ai->devnode));
2700 strlcat(ai->devnode, devname, sizeof(ai->devnode));
2701 ai->enabled = device_is_attached(d->dev) ? 1 : 0;
2702 /**
2703 * @note
2704 * @c flags - OSSv4 docs: "Reserved for future use."
2705 *
2706 * @note
2707 * @c binding - OSSv4 docs: "Reserved for future use."
2708 *
2709 * @todo @c handle - haven't decided how to generate
2710 * this yet; bus, vendor, device IDs?
2711 */
2712 ai->min_rate = caps->minspeed;
2713 ai->max_rate = caps->maxspeed;
2714
2715 ai->min_channels = minch;
2716 ai->max_channels = maxch;
2717
2718 ai->nrates = chn_getrates(ch, &rates);
2719 if (ai->nrates > OSS_MAX_SAMPLE_RATES)
2720 ai->nrates = OSS_MAX_SAMPLE_RATES;
2721
2722 for (i = 0; i < ai->nrates; i++)
2723 ai->rates[i] = rates[i];
2724
2725 ai->next_play_engine = 0;
2726 ai->next_rec_engine = 0;
2727
2728 CHN_UNLOCK(ch);
2729 }
2730
2731 PCM_UNLOCK(d);
2732
2733 if (devname != NULL)
2734 return (0);
2735 }
2736
2737 /* Exhausted the search -- nothing is locked, so return. */
2738 return (EINVAL);
2739 }
2740
2741 /**
2742 * @brief Assigns a PCM channel to a sync group.
2743 *
2744 * Sync groups are used to enable audio operations on multiple devices
2745 * simultaneously. They may be used with any number of devices and may
2746 * span across applications. Devices are added to groups with
2747 * the SNDCTL_DSP_SYNCGROUP ioctl, and operations are triggered with the
2748 * SNDCTL_DSP_SYNCSTART ioctl.
2749 *
2750 * If the @c id field of the @c group parameter is set to zero, then a new
2751 * sync group is created. Otherwise, wrch and rdch (if set) are added to
2752 * the group specified.
2753 *
2754 * @todo As far as memory allocation, should we assume that things are
2755 * okay and allocate with M_WAITOK before acquiring channel locks,
2756 * freeing later if not?
2757 *
2758 * @param wrch output channel associated w/ device (if any)
2759 * @param rdch input channel associated w/ device (if any)
2760 * @param group Sync group parameters
2761 *
2762 * @retval 0 success
2763 * @retval non-zero error to be propagated upstream
2764 */
2765 static int
2766 dsp_oss_syncgroup(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_syncgroup *group)
2767 {
2768 struct pcmchan_syncmember *smrd, *smwr;
2769 struct pcmchan_syncgroup *sg;
2770 int ret, sg_ids[3];
2771
2772 smrd = NULL;
2773 smwr = NULL;
2774 sg = NULL;
2775 ret = 0;
2776
2777 /*
2778 * Free_unr() may sleep, so store released syncgroup IDs until after
2779 * all locks are released.
2780 */
2781 sg_ids[0] = sg_ids[1] = sg_ids[2] = 0;
2782
2783 PCM_SG_LOCK();
2784
2785 /*
2786 * - Insert channel(s) into group's member list.
2787 * - Set CHN_F_NOTRIGGER on channel(s).
2788 * - Stop channel(s).
2789 */
2790
2791 /*
2792 * If device's channels are already mapped to a group, unmap them.
2793 */
2794 if (wrch) {
2795 CHN_LOCK(wrch);
2796 sg_ids[0] = chn_syncdestroy(wrch);
2797 }
2798
2799 if (rdch) {
2800 CHN_LOCK(rdch);
2801 sg_ids[1] = chn_syncdestroy(rdch);
2802 }
2803
2804 /*
2805 * Verify that mode matches character device properites.
2806 * - Bail if PCM_ENABLE_OUTPUT && wrch == NULL.
2807 * - Bail if PCM_ENABLE_INPUT && rdch == NULL.
2808 */
2809 if (((wrch == NULL) && (group->mode & PCM_ENABLE_OUTPUT)) ||
2810 ((rdch == NULL) && (group->mode & PCM_ENABLE_INPUT))) {
2811 ret = EINVAL;
2812 goto out;
2813 }
2814
2815 /*
2816 * An id of zero indicates the user wants to create a new
2817 * syncgroup.
2818 */
2819 if (group->id == 0) {
2820 sg = (struct pcmchan_syncgroup *)malloc(sizeof(*sg), M_DEVBUF, M_NOWAIT);
2821 if (sg != NULL) {
2822 SLIST_INIT(&sg->members);
2823 sg->id = alloc_unr(pcmsg_unrhdr);
2824
2825 group->id = sg->id;
2826 SLIST_INSERT_HEAD(&snd_pcm_syncgroups, sg, link);
2827 } else
2828 ret = ENOMEM;
2829 } else {
2830 SLIST_FOREACH(sg, &snd_pcm_syncgroups, link) {
2831 if (sg->id == group->id)
2832 break;
2833 }
2834 if (sg == NULL)
2835 ret = EINVAL;
2836 }
2837
2838 /* Couldn't create or find a syncgroup. Fail. */
2839 if (sg == NULL)
2840 goto out;
2841
2842 /*
2843 * Allocate a syncmember, assign it and a channel together, and
2844 * insert into syncgroup.
2845 */
2846 if (group->mode & PCM_ENABLE_INPUT) {
2847 smrd = (struct pcmchan_syncmember *)malloc(sizeof(*smrd), M_DEVBUF, M_NOWAIT);
2848 if (smrd == NULL) {
2849 ret = ENOMEM;
2850 goto out;
2851 }
2852
2853 SLIST_INSERT_HEAD(&sg->members, smrd, link);
2854 smrd->parent = sg;
2855 smrd->ch = rdch;
2856
2857 chn_abort(rdch);
2858 rdch->flags |= CHN_F_NOTRIGGER;
2859 rdch->sm = smrd;
2860 }
2861
2862 if (group->mode & PCM_ENABLE_OUTPUT) {
2863 smwr = (struct pcmchan_syncmember *)malloc(sizeof(*smwr), M_DEVBUF, M_NOWAIT);
2864 if (smwr == NULL) {
2865 ret = ENOMEM;
2866 goto out;
2867 }
2868
2869 SLIST_INSERT_HEAD(&sg->members, smwr, link);
2870 smwr->parent = sg;
2871 smwr->ch = wrch;
2872
2873 chn_abort(wrch);
2874 wrch->flags |= CHN_F_NOTRIGGER;
2875 wrch->sm = smwr;
2876 }
2877
2878
2879 out:
2880 if (ret != 0) {
2881 if (smrd != NULL)
2882 free(smrd, M_DEVBUF);
2883 if ((sg != NULL) && SLIST_EMPTY(&sg->members)) {
2884 sg_ids[2] = sg->id;
2885 SLIST_REMOVE(&snd_pcm_syncgroups, sg, pcmchan_syncgroup, link);
2886 free(sg, M_DEVBUF);
2887 }
2888
2889 if (wrch)
2890 wrch->sm = NULL;
2891 if (rdch)
2892 rdch->sm = NULL;
2893 }
2894
2895 if (wrch)
2896 CHN_UNLOCK(wrch);
2897 if (rdch)
2898 CHN_UNLOCK(rdch);
2899
2900 PCM_SG_UNLOCK();
2901
2902 if (sg_ids[0])
2903 free_unr(pcmsg_unrhdr, sg_ids[0]);
2904 if (sg_ids[1])
2905 free_unr(pcmsg_unrhdr, sg_ids[1]);
2906 if (sg_ids[2])
2907 free_unr(pcmsg_unrhdr, sg_ids[2]);
2908
2909 return (ret);
2910 }
2911
2912 /**
2913 * @brief Launch a sync group into action
2914 *
2915 * Sync groups are established via SNDCTL_DSP_SYNCGROUP. This function
2916 * iterates over all members, triggering them along the way.
2917 *
2918 * @note Caller must not hold any channel locks.
2919 *
2920 * @param sg_id sync group identifier
2921 *
2922 * @retval 0 success
2923 * @retval non-zero error worthy of propagating upstream to user
2924 */
2925 static int
2926 dsp_oss_syncstart(int sg_id)
2927 {
2928 struct pcmchan_syncmember *sm, *sm_tmp;
2929 struct pcmchan_syncgroup *sg;
2930 struct pcm_channel *c;
2931 int ret, needlocks;
2932
2933 /* Get the synclists lock */
2934 PCM_SG_LOCK();
2935
2936 do {
2937 ret = 0;
2938 needlocks = 0;
2939
2940 /* Search for syncgroup by ID */
2941 SLIST_FOREACH(sg, &snd_pcm_syncgroups, link) {
2942 if (sg->id == sg_id)
2943 break;
2944 }
2945
2946 /* Return EINVAL if not found */
2947 if (sg == NULL) {
2948 ret = EINVAL;
2949 break;
2950 }
2951
2952 /* Any removals resulting in an empty group should've handled this */
2953 KASSERT(!SLIST_EMPTY(&sg->members), ("found empty syncgroup"));
2954
2955 /*
2956 * Attempt to lock all member channels - if any are already
2957 * locked, unlock those acquired, sleep for a bit, and try
2958 * again.
2959 */
2960 SLIST_FOREACH(sm, &sg->members, link) {
2961 if (CHN_TRYLOCK(sm->ch) == 0) {
2962 int timo = hz * 5/1000;
2963 if (timo < 1)
2964 timo = 1;
2965
2966 /* Release all locked channels so far, retry */
2967 SLIST_FOREACH(sm_tmp, &sg->members, link) {
2968 /* sm is the member already locked */
2969 if (sm == sm_tmp)
2970 break;
2971 CHN_UNLOCK(sm_tmp->ch);
2972 }
2973
2974 /** @todo Is PRIBIO correct/ */
2975 ret = msleep(sm, &snd_pcm_syncgroups_mtx,
2976 PRIBIO | PCATCH, "pcmsg", timo);
2977 if (ret == EINTR || ret == ERESTART)
2978 break;
2979
2980 needlocks = 1;
2981 ret = 0; /* Assumes ret == EAGAIN... */
2982 }
2983 }
2984 } while (needlocks && ret == 0);
2985
2986 /* Proceed only if no errors encountered. */
2987 if (ret == 0) {
2988 /* Launch channels */
2989 while ((sm = SLIST_FIRST(&sg->members)) != NULL) {
2990 SLIST_REMOVE_HEAD(&sg->members, link);
2991
2992 c = sm->ch;
2993 c->sm = NULL;
2994 chn_start(c, 1);
2995 c->flags &= ~CHN_F_NOTRIGGER;
2996 CHN_UNLOCK(c);
2997
2998 free(sm, M_DEVBUF);
2999 }
3000
3001 SLIST_REMOVE(&snd_pcm_syncgroups, sg, pcmchan_syncgroup, link);
3002 free(sg, M_DEVBUF);
3003 }
3004
3005 PCM_SG_UNLOCK();
3006
3007 /*
3008 * Free_unr() may sleep, so be sure to give up the syncgroup lock
3009 * first.
3010 */
3011 if (ret == 0)
3012 free_unr(pcmsg_unrhdr, sg_id);
3013
3014 return (ret);
3015 }
3016
3017 /**
3018 * @brief Handler for SNDCTL_DSP_POLICY
3019 *
3020 * The SNDCTL_DSP_POLICY ioctl is a simpler interface to control fragment
3021 * size and count like with SNDCTL_DSP_SETFRAGMENT. Instead of the user
3022 * specifying those two parameters, s/he simply selects a number from 0..10
3023 * which corresponds to a buffer size. Smaller numbers request smaller
3024 * buffers with lower latencies (at greater overhead from more frequent
3025 * interrupts), while greater numbers behave in the opposite manner.
3026 *
3027 * The 4Front spec states that a value of 5 should be the default. However,
3028 * this implementation deviates slightly by using a linear scale without
3029 * consulting drivers. I.e., even though drivers may have different default
3030 * buffer sizes, a policy argument of 5 will have the same result across
3031 * all drivers.
3032 *
3033 * See http://manuals.opensound.com/developer/SNDCTL_DSP_POLICY.html for
3034 * more information.
3035 *
3036 * @todo When SNDCTL_DSP_COOKEDMODE is supported, it'll be necessary to
3037 * work with hardware drivers directly.
3038 *
3039 * @note PCM channel arguments must not be locked by caller.
3040 *
3041 * @param wrch Pointer to opened playback channel (optional; may be NULL)
3042 * @param rdch " recording channel (optional; may be NULL)
3043 * @param policy Integer from [0:10]
3044 *
3045 * @retval 0 constant (for now)
3046 */
3047 static int
3048 dsp_oss_policy(struct pcm_channel *wrch, struct pcm_channel *rdch, int policy)
3049 {
3050 int ret;
3051
3052 if (policy < CHN_POLICY_MIN || policy > CHN_POLICY_MAX)
3053 return (EIO);
3054
3055 /* Default: success */
3056 ret = 0;
3057
3058 if (rdch) {
3059 CHN_LOCK(rdch);
3060 ret = chn_setlatency(rdch, policy);
3061 CHN_UNLOCK(rdch);
3062 }
3063
3064 if (wrch && ret == 0) {
3065 CHN_LOCK(wrch);
3066 ret = chn_setlatency(wrch, policy);
3067 CHN_UNLOCK(wrch);
3068 }
3069
3070 if (ret)
3071 ret = EIO;
3072
3073 return (ret);
3074 }
3075
3076 /**
3077 * @brief Enable or disable "cooked" mode
3078 *
3079 * This is a handler for @c SNDCTL_DSP_COOKEDMODE. When in cooked mode, which
3080 * is the default, the sound system handles rate and format conversions
3081 * automatically (ex: user writing 11025Hz/8 bit/unsigned but card only
3082 * operates with 44100Hz/16bit/signed samples).
3083 *
3084 * Disabling cooked mode is intended for applications wanting to mmap()
3085 * a sound card's buffer space directly, bypassing the FreeBSD 2-stage
3086 * feeder architecture, presumably to gain as much control over audio
3087 * hardware as possible.
3088 *
3089 * See @c http://manuals.opensound.com/developer/SNDCTL_DSP_COOKEDMODE.html
3090 * for more details.
3091 *
3092 * @param wrch playback channel (optional; may be NULL)
3093 * @param rdch recording channel (optional; may be NULL)
3094 * @param enabled 0 = raw mode, 1 = cooked mode
3095 *
3096 * @retval EINVAL Operation not yet supported.
3097 */
3098 static int
3099 dsp_oss_cookedmode(struct pcm_channel *wrch, struct pcm_channel *rdch, int enabled)
3100 {
3101
3102 /*
3103 * XXX I just don't get it. Why don't they call it
3104 * "BITPERFECT" ~ SNDCTL_DSP_BITPERFECT !?!?.
3105 * This is just plain so confusing, incoherent,
3106 * <insert any non-printable characters here>.
3107 */
3108 if (!(enabled == 1 || enabled == 0))
3109 return (EINVAL);
3110
3111 /*
3112 * I won't give in. I'm inverting its logic here and now.
3113 * Brag all you want, but "BITPERFECT" should be the better
3114 * term here.
3115 */
3116 enabled ^= 0x00000001;
3117
3118 if (wrch != NULL) {
3119 CHN_LOCK(wrch);
3120 wrch->flags &= ~CHN_F_BITPERFECT;
3121 wrch->flags |= (enabled != 0) ? CHN_F_BITPERFECT : 0x00000000;
3122 CHN_UNLOCK(wrch);
3123 }
3124
3125 if (rdch != NULL) {
3126 CHN_LOCK(rdch);
3127 rdch->flags &= ~CHN_F_BITPERFECT;
3128 rdch->flags |= (enabled != 0) ? CHN_F_BITPERFECT : 0x00000000;
3129 CHN_UNLOCK(rdch);
3130 }
3131
3132 return (0);
3133 }
3134
3135 /**
3136 * @brief Retrieve channel interleaving order
3137 *
3138 * This is the handler for @c SNDCTL_DSP_GET_CHNORDER.
3139 *
3140 * See @c http://manuals.opensound.com/developer/SNDCTL_DSP_GET_CHNORDER.html
3141 * for more details.
3142 *
3143 * @note As the ioctl definition is still under construction, FreeBSD
3144 * does not currently support SNDCTL_DSP_GET_CHNORDER.
3145 *
3146 * @param wrch playback channel (optional; may be NULL)
3147 * @param rdch recording channel (optional; may be NULL)
3148 * @param map channel map (result will be stored there)
3149 *
3150 * @retval EINVAL Operation not yet supported.
3151 */
3152 static int
3153 dsp_oss_getchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map)
3154 {
3155 struct pcm_channel *ch;
3156 int ret;
3157
3158 ch = (wrch != NULL) ? wrch : rdch;
3159 if (ch != NULL) {
3160 CHN_LOCK(ch);
3161 ret = chn_oss_getorder(ch, map);
3162 CHN_UNLOCK(ch);
3163 } else
3164 ret = EINVAL;
3165
3166 return (ret);
3167 }
3168
3169 /**
3170 * @brief Specify channel interleaving order
3171 *
3172 * This is the handler for @c SNDCTL_DSP_SET_CHNORDER.
3173 *
3174 * @note As the ioctl definition is still under construction, FreeBSD
3175 * does not currently support @c SNDCTL_DSP_SET_CHNORDER.
3176 *
3177 * @param wrch playback channel (optional; may be NULL)
3178 * @param rdch recording channel (optional; may be NULL)
3179 * @param map channel map
3180 *
3181 * @retval EINVAL Operation not yet supported.
3182 */
3183 static int
3184 dsp_oss_setchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map)
3185 {
3186 int ret;
3187
3188 ret = 0;
3189
3190 if (wrch != NULL) {
3191 CHN_LOCK(wrch);
3192 ret = chn_oss_setorder(wrch, map);
3193 CHN_UNLOCK(wrch);
3194 }
3195
3196 if (ret == 0 && rdch != NULL) {
3197 CHN_LOCK(rdch);
3198 ret = chn_oss_setorder(rdch, map);
3199 CHN_UNLOCK(rdch);
3200 }
3201
3202 return (ret);
3203 }
3204
3205 static int
3206 dsp_oss_getchannelmask(struct pcm_channel *wrch, struct pcm_channel *rdch,
3207 int *mask)
3208 {
3209 struct pcm_channel *ch;
3210 uint32_t chnmask;
3211 int ret;
3212
3213 chnmask = 0;
3214 ch = (wrch != NULL) ? wrch : rdch;
3215
3216 if (ch != NULL) {
3217 CHN_LOCK(ch);
3218 ret = chn_oss_getmask(ch, &chnmask);
3219 CHN_UNLOCK(ch);
3220 } else
3221 ret = EINVAL;
3222
3223 if (ret == 0)
3224 *mask = chnmask;
3225
3226 return (ret);
3227 }
3228
3229 #ifdef OSSV4_EXPERIMENT
3230 /**
3231 * @brief Retrieve an audio device's label
3232 *
3233 * This is a handler for the @c SNDCTL_GETLABEL ioctl.
3234 *
3235 * See @c http://manuals.opensound.com/developer/SNDCTL_GETLABEL.html
3236 * for more details.
3237 *
3238 * From Hannu@4Front: "For example ossxmix (just like some HW mixer
3239 * consoles) can show variable "labels" for certain controls. By default
3240 * the application name (say quake) is shown as the label but
3241 * applications may change the labels themselves."
3242 *
3243 * @note As the ioctl definition is still under construction, FreeBSD
3244 * does not currently support @c SNDCTL_GETLABEL.
3245 *
3246 * @param wrch playback channel (optional; may be NULL)
3247 * @param rdch recording channel (optional; may be NULL)
3248 * @param label label gets copied here
3249 *
3250 * @retval EINVAL Operation not yet supported.
3251 */
3252 static int
3253 dsp_oss_getlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label)
3254 {
3255 return (EINVAL);
3256 }
3257
3258 /**
3259 * @brief Specify an audio device's label
3260 *
3261 * This is a handler for the @c SNDCTL_SETLABEL ioctl. Please see the
3262 * comments for @c dsp_oss_getlabel immediately above.
3263 *
3264 * See @c http://manuals.opensound.com/developer/SNDCTL_GETLABEL.html
3265 * for more details.
3266 *
3267 * @note As the ioctl definition is still under construction, FreeBSD
3268 * does not currently support SNDCTL_SETLABEL.
3269 *
3270 * @param wrch playback channel (optional; may be NULL)
3271 * @param rdch recording channel (optional; may be NULL)
3272 * @param label label gets copied from here
3273 *
3274 * @retval EINVAL Operation not yet supported.
3275 */
3276 static int
3277 dsp_oss_setlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label)
3278 {
3279 return (EINVAL);
3280 }
3281
3282 /**
3283 * @brief Retrieve name of currently played song
3284 *
3285 * This is a handler for the @c SNDCTL_GETSONG ioctl. Audio players could
3286 * tell the system the name of the currently playing song, which would be
3287 * visible in @c /dev/sndstat.
3288 *
3289 * See @c http://manuals.opensound.com/developer/SNDCTL_GETSONG.html
3290 * for more details.
3291 *
3292 * @note As the ioctl definition is still under construction, FreeBSD
3293 * does not currently support SNDCTL_GETSONG.
3294 *
3295 * @param wrch playback channel (optional; may be NULL)
3296 * @param rdch recording channel (optional; may be NULL)
3297 * @param song song name gets copied here
3298 *
3299 * @retval EINVAL Operation not yet supported.
3300 */
3301 static int
3302 dsp_oss_getsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song)
3303 {
3304 return (EINVAL);
3305 }
3306
3307 /**
3308 * @brief Retrieve name of currently played song
3309 *
3310 * This is a handler for the @c SNDCTL_SETSONG ioctl. Audio players could
3311 * tell the system the name of the currently playing song, which would be
3312 * visible in @c /dev/sndstat.
3313 *
3314 * See @c http://manuals.opensound.com/developer/SNDCTL_SETSONG.html
3315 * for more details.
3316 *
3317 * @note As the ioctl definition is still under construction, FreeBSD
3318 * does not currently support SNDCTL_SETSONG.
3319 *
3320 * @param wrch playback channel (optional; may be NULL)
3321 * @param rdch recording channel (optional; may be NULL)
3322 * @param song song name gets copied from here
3323 *
3324 * @retval EINVAL Operation not yet supported.
3325 */
3326 static int
3327 dsp_oss_setsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song)
3328 {
3329 return (EINVAL);
3330 }
3331
3332 /**
3333 * @brief Rename a device
3334 *
3335 * This is a handler for the @c SNDCTL_SETNAME ioctl.
3336 *
3337 * See @c http://manuals.opensound.com/developer/SNDCTL_SETNAME.html for
3338 * more details.
3339 *
3340 * From Hannu@4Front: "This call is used to change the device name
3341 * reported in /dev/sndstat and ossinfo. So instead of using some generic
3342 * 'OSS loopback audio (MIDI) driver' the device may be given a meaningfull
3343 * name depending on the current context (for example 'OSS virtual wave table
3344 * synth' or 'VoIP link to London')."
3345 *
3346 * @note As the ioctl definition is still under construction, FreeBSD
3347 * does not currently support SNDCTL_SETNAME.
3348 *
3349 * @param wrch playback channel (optional; may be NULL)
3350 * @param rdch recording channel (optional; may be NULL)
3351 * @param name new device name gets copied from here
3352 *
3353 * @retval EINVAL Operation not yet supported.
3354 */
3355 static int
3356 dsp_oss_setname(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *name)
3357 {
3358 return (EINVAL);
3359 }
3360 #endif /* !OSSV4_EXPERIMENT */
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