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("$FreeBSD$");
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 static int dsp_basename_clone = 1;
50 SYSCTL_INT(_hw_snd, OID_AUTO, basename_clone, CTLFLAG_RWTUN,
51 &dsp_basename_clone, 0,
52 "DSP basename cloning (0: Disable; 1: Enabled)");
53 TUNABLE_INT("hw.snd.basename_clone", &dsp_basename_clone);
54
55 struct dsp_cdevinfo {
56 struct pcm_channel *rdch, *wrch;
57 struct pcm_channel *volch;
58 int busy, simplex;
59 TAILQ_ENTRY(dsp_cdevinfo) link;
60 };
61
62 #define PCM_RDCH(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->rdch)
63 #define PCM_WRCH(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->wrch)
64 #define PCM_VOLCH(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->volch)
65 #define PCM_SIMPLEX(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->simplex)
66
67 #define DSP_CDEVINFO_CACHESIZE 8
68
69 #define DSP_REGISTERED(x, y) (PCM_REGISTERED(x) && \
70 (y) != NULL && (y)->si_drv1 != NULL)
71
72 #define OLDPCM_IOCTL
73
74 static d_open_t dsp_open;
75 static d_close_t dsp_close;
76 static d_read_t dsp_read;
77 static d_write_t dsp_write;
78 static d_ioctl_t dsp_ioctl;
79 static d_poll_t dsp_poll;
80 static d_mmap_t dsp_mmap;
81 static d_mmap_single_t dsp_mmap_single;
82
83 struct cdevsw dsp_cdevsw = {
84 .d_version = D_VERSION,
85 .d_open = dsp_open,
86 .d_close = dsp_close,
87 .d_read = dsp_read,
88 .d_write = dsp_write,
89 .d_ioctl = dsp_ioctl,
90 .d_poll = dsp_poll,
91 .d_mmap = dsp_mmap,
92 .d_mmap_single = dsp_mmap_single,
93 .d_name = "dsp",
94 };
95
96 static eventhandler_tag dsp_ehtag = NULL;
97 static int dsp_umax = -1;
98 static int dsp_cmax = -1;
99
100 static int dsp_oss_syncgroup(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_syncgroup *group);
101 static int dsp_oss_syncstart(int sg_id);
102 static int dsp_oss_policy(struct pcm_channel *wrch, struct pcm_channel *rdch, int policy);
103 static int dsp_oss_cookedmode(struct pcm_channel *wrch, struct pcm_channel *rdch, int enabled);
104 static int dsp_oss_getchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map);
105 static int dsp_oss_setchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map);
106 static int dsp_oss_getchannelmask(struct pcm_channel *wrch, struct pcm_channel *rdch, int *mask);
107 #ifdef OSSV4_EXPERIMENT
108 static int dsp_oss_getlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label);
109 static int dsp_oss_setlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label);
110 static int dsp_oss_getsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song);
111 static int dsp_oss_setsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song);
112 static int dsp_oss_setname(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *name);
113 #endif
114
115 static struct snddev_info *
116 dsp_get_info(struct cdev *dev)
117 {
118 return (devclass_get_softc(pcm_devclass, PCMUNIT(dev)));
119 }
120
121 static uint32_t
122 dsp_get_flags(struct cdev *dev)
123 {
124 device_t bdev;
125
126 bdev = devclass_get_device(pcm_devclass, PCMUNIT(dev));
127
128 return ((bdev != NULL) ? pcm_getflags(bdev) : 0xffffffff);
129 }
130
131 static void
132 dsp_set_flags(struct cdev *dev, uint32_t flags)
133 {
134 device_t bdev;
135
136 bdev = devclass_get_device(pcm_devclass, PCMUNIT(dev));
137
138 if (bdev != NULL)
139 pcm_setflags(bdev, flags);
140 }
141
142 /*
143 * return the channels associated with an open device instance.
144 * lock channels specified.
145 */
146 static int
147 getchns(struct cdev *dev, struct pcm_channel **rdch, struct pcm_channel **wrch,
148 uint32_t prio)
149 {
150 struct snddev_info *d;
151 struct pcm_channel *ch;
152 uint32_t flags;
153
154 if (PCM_SIMPLEX(dev) != 0) {
155 d = dsp_get_info(dev);
156 if (!PCM_REGISTERED(d))
157 return (ENXIO);
158 PCM_LOCK(d);
159 PCM_WAIT(d);
160 PCM_ACQUIRE(d);
161 /*
162 * Note: order is important -
163 * pcm flags -> prio query flags -> wild guess
164 */
165 ch = NULL;
166 flags = dsp_get_flags(dev);
167 if (flags & SD_F_PRIO_WR) {
168 ch = PCM_RDCH(dev);
169 PCM_RDCH(dev) = NULL;
170 } else if (flags & SD_F_PRIO_RD) {
171 ch = PCM_WRCH(dev);
172 PCM_WRCH(dev) = NULL;
173 } else if (prio & SD_F_PRIO_WR) {
174 ch = PCM_RDCH(dev);
175 PCM_RDCH(dev) = NULL;
176 flags |= SD_F_PRIO_WR;
177 } else if (prio & SD_F_PRIO_RD) {
178 ch = PCM_WRCH(dev);
179 PCM_WRCH(dev) = NULL;
180 flags |= SD_F_PRIO_RD;
181 } else if (PCM_WRCH(dev) != NULL) {
182 ch = PCM_RDCH(dev);
183 PCM_RDCH(dev) = NULL;
184 flags |= SD_F_PRIO_WR;
185 } else if (PCM_RDCH(dev) != NULL) {
186 ch = PCM_WRCH(dev);
187 PCM_WRCH(dev) = NULL;
188 flags |= SD_F_PRIO_RD;
189 }
190 PCM_SIMPLEX(dev) = 0;
191 dsp_set_flags(dev, flags);
192 if (ch != NULL) {
193 CHN_LOCK(ch);
194 pcm_chnref(ch, -1);
195 pcm_chnrelease(ch);
196 }
197 PCM_RELEASE(d);
198 PCM_UNLOCK(d);
199 }
200
201 *rdch = PCM_RDCH(dev);
202 *wrch = PCM_WRCH(dev);
203
204 if (*rdch != NULL && (prio & SD_F_PRIO_RD))
205 CHN_LOCK(*rdch);
206 if (*wrch != NULL && (prio & SD_F_PRIO_WR))
207 CHN_LOCK(*wrch);
208
209 return (0);
210 }
211
212 /* unlock specified channels */
213 static void
214 relchns(struct cdev *dev, struct pcm_channel *rdch, struct pcm_channel *wrch,
215 uint32_t prio)
216 {
217 if (wrch != NULL && (prio & SD_F_PRIO_WR))
218 CHN_UNLOCK(wrch);
219 if (rdch != NULL && (prio & SD_F_PRIO_RD))
220 CHN_UNLOCK(rdch);
221 }
222
223 static void
224 dsp_cdevinfo_alloc(struct cdev *dev,
225 struct pcm_channel *rdch, struct pcm_channel *wrch,
226 struct pcm_channel *volch)
227 {
228 struct snddev_info *d;
229 struct dsp_cdevinfo *cdi;
230 int simplex;
231
232 d = dsp_get_info(dev);
233
234 KASSERT(PCM_REGISTERED(d) && dev != NULL && dev->si_drv1 == NULL &&
235 ((rdch == NULL && wrch == NULL) || rdch != wrch),
236 ("bogus %s(), what are you trying to accomplish here?", __func__));
237 PCM_BUSYASSERT(d);
238 PCM_LOCKASSERT(d);
239
240 simplex = (dsp_get_flags(dev) & SD_F_SIMPLEX) ? 1 : 0;
241
242 /*
243 * Scan for free instance entry and put it into the end of list.
244 * Create new one if necessary.
245 */
246 TAILQ_FOREACH(cdi, &d->dsp_cdevinfo_pool, link) {
247 if (cdi->busy != 0)
248 break;
249 cdi->rdch = rdch;
250 cdi->wrch = wrch;
251 cdi->volch = volch;
252 cdi->simplex = simplex;
253 cdi->busy = 1;
254 TAILQ_REMOVE(&d->dsp_cdevinfo_pool, cdi, link);
255 TAILQ_INSERT_TAIL(&d->dsp_cdevinfo_pool, cdi, link);
256 dev->si_drv1 = cdi;
257 return;
258 }
259 PCM_UNLOCK(d);
260 cdi = malloc(sizeof(*cdi), M_DEVBUF, M_WAITOK | M_ZERO);
261 PCM_LOCK(d);
262 cdi->rdch = rdch;
263 cdi->wrch = wrch;
264 cdi->volch = volch;
265 cdi->simplex = simplex;
266 cdi->busy = 1;
267 TAILQ_INSERT_TAIL(&d->dsp_cdevinfo_pool, cdi, link);
268 dev->si_drv1 = cdi;
269 }
270
271 static void
272 dsp_cdevinfo_free(struct cdev *dev)
273 {
274 struct snddev_info *d;
275 struct dsp_cdevinfo *cdi, *tmp;
276 uint32_t flags;
277 int i;
278
279 d = dsp_get_info(dev);
280
281 KASSERT(PCM_REGISTERED(d) && dev != NULL && dev->si_drv1 != NULL &&
282 PCM_RDCH(dev) == NULL && PCM_WRCH(dev) == NULL &&
283 PCM_VOLCH(dev) == NULL,
284 ("bogus %s(), what are you trying to accomplish here?", __func__));
285 PCM_BUSYASSERT(d);
286 PCM_LOCKASSERT(d);
287
288 cdi = dev->si_drv1;
289 dev->si_drv1 = NULL;
290 cdi->rdch = NULL;
291 cdi->wrch = NULL;
292 cdi->volch = NULL;
293 cdi->simplex = 0;
294 cdi->busy = 0;
295
296 /*
297 * Once it is free, move it back to the beginning of list for
298 * faster new entry allocation.
299 */
300 TAILQ_REMOVE(&d->dsp_cdevinfo_pool, cdi, link);
301 TAILQ_INSERT_HEAD(&d->dsp_cdevinfo_pool, cdi, link);
302
303 /*
304 * Scan the list, cache free entries up to DSP_CDEVINFO_CACHESIZE.
305 * Reset simplex flags.
306 */
307 flags = dsp_get_flags(dev) & ~SD_F_PRIO_SET;
308 i = DSP_CDEVINFO_CACHESIZE;
309 TAILQ_FOREACH_SAFE(cdi, &d->dsp_cdevinfo_pool, link, tmp) {
310 if (cdi->busy != 0) {
311 if (cdi->simplex == 0) {
312 if (cdi->rdch != NULL)
313 flags |= SD_F_PRIO_RD;
314 if (cdi->wrch != NULL)
315 flags |= SD_F_PRIO_WR;
316 }
317 } else {
318 if (i == 0) {
319 TAILQ_REMOVE(&d->dsp_cdevinfo_pool, cdi, link);
320 free(cdi, M_DEVBUF);
321 } else
322 i--;
323 }
324 }
325 dsp_set_flags(dev, flags);
326 }
327
328 void
329 dsp_cdevinfo_init(struct snddev_info *d)
330 {
331 struct dsp_cdevinfo *cdi;
332 int i;
333
334 KASSERT(d != NULL, ("NULL snddev_info"));
335 PCM_BUSYASSERT(d);
336 PCM_UNLOCKASSERT(d);
337
338 TAILQ_INIT(&d->dsp_cdevinfo_pool);
339 for (i = 0; i < DSP_CDEVINFO_CACHESIZE; i++) {
340 cdi = malloc(sizeof(*cdi), M_DEVBUF, M_WAITOK | M_ZERO);
341 TAILQ_INSERT_HEAD(&d->dsp_cdevinfo_pool, cdi, link);
342 }
343 }
344
345 void
346 dsp_cdevinfo_flush(struct snddev_info *d)
347 {
348 struct dsp_cdevinfo *cdi, *tmp;
349
350 KASSERT(d != NULL, ("NULL snddev_info"));
351 PCM_BUSYASSERT(d);
352 PCM_UNLOCKASSERT(d);
353
354 cdi = TAILQ_FIRST(&d->dsp_cdevinfo_pool);
355 while (cdi != NULL) {
356 tmp = TAILQ_NEXT(cdi, link);
357 free(cdi, M_DEVBUF);
358 cdi = tmp;
359 }
360 TAILQ_INIT(&d->dsp_cdevinfo_pool);
361 }
362
363 /* duplex / simplex cdev type */
364 enum {
365 DSP_CDEV_TYPE_RDONLY, /* simplex read-only (record) */
366 DSP_CDEV_TYPE_WRONLY, /* simplex write-only (play) */
367 DSP_CDEV_TYPE_RDWR /* duplex read, write, or both */
368 };
369
370 enum {
371 DSP_CDEV_VOLCTL_NONE,
372 DSP_CDEV_VOLCTL_READ,
373 DSP_CDEV_VOLCTL_WRITE
374 };
375
376 #define DSP_F_VALID(x) ((x) & (FREAD | FWRITE))
377 #define DSP_F_DUPLEX(x) (((x) & (FREAD | FWRITE)) == (FREAD | FWRITE))
378 #define DSP_F_SIMPLEX(x) (!DSP_F_DUPLEX(x))
379 #define DSP_F_READ(x) ((x) & FREAD)
380 #define DSP_F_WRITE(x) ((x) & FWRITE)
381
382 static const struct {
383 int type;
384 char *name;
385 char *sep;
386 char *alias;
387 int use_sep;
388 int hw;
389 int max;
390 int volctl;
391 uint32_t fmt, spd;
392 int query;
393 } dsp_cdevs[] = {
394 { SND_DEV_DSP, "dsp", ".", NULL, 0, 0, 0, 0,
395 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
396 DSP_CDEV_TYPE_RDWR },
397 { SND_DEV_AUDIO, "audio", ".", NULL, 0, 0, 0, 0,
398 SND_FORMAT(AFMT_MU_LAW, 1, 0), DSP_DEFAULT_SPEED,
399 DSP_CDEV_TYPE_RDWR },
400 { SND_DEV_DSP16, "dspW", ".", NULL, 0, 0, 0, 0,
401 SND_FORMAT(AFMT_S16_LE, 1, 0), DSP_DEFAULT_SPEED,
402 DSP_CDEV_TYPE_RDWR },
403 { SND_DEV_DSPHW_PLAY, "dsp", ".p", NULL, 1, 1, SND_MAXHWCHAN, 1,
404 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_WRONLY },
405 { SND_DEV_DSPHW_VPLAY, "dsp", ".vp", NULL, 1, 1, SND_MAXVCHANS, 1,
406 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_WRONLY },
407 { SND_DEV_DSPHW_REC, "dsp", ".r", NULL, 1, 1, SND_MAXHWCHAN, 1,
408 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_RDONLY },
409 { SND_DEV_DSPHW_VREC, "dsp", ".vr", NULL, 1, 1, SND_MAXVCHANS, 1,
410 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_RDONLY },
411 { SND_DEV_DSPHW_CD, "dspcd", ".", NULL, 0, 0, 0, 0,
412 SND_FORMAT(AFMT_S16_LE, 2, 0), 44100, DSP_CDEV_TYPE_RDWR },
413 /* Low priority, OSSv4 aliases. */
414 { SND_DEV_DSP, "dsp_ac3", ".", "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_mmap", ".", "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_multich", ".", "dsp", 0, 0, 0, 0,
421 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
422 DSP_CDEV_TYPE_RDWR },
423 { SND_DEV_DSP, "dsp_spdifout", ".", "dsp", 0, 0, 0, 0,
424 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
425 DSP_CDEV_TYPE_RDWR },
426 { SND_DEV_DSP, "dsp_spdifin", ".", "dsp", 0, 0, 0, 0,
427 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
428 DSP_CDEV_TYPE_RDWR },
429 };
430
431 #define DSP_FIXUP_ERROR() do { \
432 prio = dsp_get_flags(i_dev); \
433 if (!DSP_F_VALID(flags)) \
434 error = EINVAL; \
435 if (!DSP_F_DUPLEX(flags) && \
436 ((DSP_F_READ(flags) && d->reccount == 0) || \
437 (DSP_F_WRITE(flags) && d->playcount == 0))) \
438 error = ENOTSUP; \
439 else if (!DSP_F_DUPLEX(flags) && (prio & SD_F_SIMPLEX) && \
440 ((DSP_F_READ(flags) && (prio & SD_F_PRIO_WR)) || \
441 (DSP_F_WRITE(flags) && (prio & SD_F_PRIO_RD)))) \
442 error = EBUSY; \
443 else if (DSP_REGISTERED(d, i_dev)) \
444 error = EBUSY; \
445 } while (0)
446
447 static int
448 dsp_open(struct cdev *i_dev, int flags, int mode, struct thread *td)
449 {
450 struct pcm_channel *rdch, *wrch;
451 struct snddev_info *d;
452 uint32_t fmt, spd, prio, volctl;
453 int i, error, rderror, wrerror, devtype, wdevunit, rdevunit;
454
455 /* Kind of impossible.. */
456 if (i_dev == NULL || td == NULL)
457 return (ENODEV);
458
459 d = dsp_get_info(i_dev);
460 if (PCM_DETACHING(d) || !PCM_REGISTERED(d))
461 return (EBADF);
462
463 PCM_GIANT_ENTER(d);
464
465 /* Lock snddev so nobody else can monkey with it. */
466 PCM_LOCK(d);
467 PCM_WAIT(d);
468
469 /*
470 * Try to acquire cloned device before someone else pick it.
471 * ENODEV means this is not a cloned droids.
472 */
473 error = snd_clone_acquire(i_dev);
474 if (!(error == 0 || error == ENODEV)) {
475 DSP_FIXUP_ERROR();
476 PCM_UNLOCK(d);
477 PCM_GIANT_EXIT(d);
478 return (error);
479 }
480
481 error = 0;
482 DSP_FIXUP_ERROR();
483
484 if (error != 0) {
485 (void)snd_clone_release(i_dev);
486 PCM_UNLOCK(d);
487 PCM_GIANT_EXIT(d);
488 return (error);
489 }
490
491 /*
492 * That is just enough. Acquire and unlock pcm lock so
493 * the other will just have to wait until we finish doing
494 * everything.
495 */
496 PCM_ACQUIRE(d);
497 PCM_UNLOCK(d);
498
499 devtype = PCMDEV(i_dev);
500 wdevunit = -1;
501 rdevunit = -1;
502 fmt = 0;
503 spd = 0;
504 volctl = DSP_CDEV_VOLCTL_NONE;
505
506 for (i = 0; i < (sizeof(dsp_cdevs) / sizeof(dsp_cdevs[0])); i++) {
507 if (devtype != dsp_cdevs[i].type || dsp_cdevs[i].alias != NULL)
508 continue;
509 /*
510 * Volume control only valid for DSPHW devices,
511 * and it must be opened in opposite direction be it
512 * simplex or duplex. Anything else will be handled
513 * as usual.
514 */
515 if (dsp_cdevs[i].query == DSP_CDEV_TYPE_WRONLY) {
516 if (dsp_cdevs[i].volctl != 0 &&
517 DSP_F_READ(flags)) {
518 volctl = DSP_CDEV_VOLCTL_WRITE;
519 flags &= ~FREAD;
520 flags |= FWRITE;
521 }
522 if (DSP_F_READ(flags)) {
523 (void)snd_clone_release(i_dev);
524 PCM_RELEASE_QUICK(d);
525 PCM_GIANT_EXIT(d);
526 return (ENOTSUP);
527 }
528 wdevunit = dev2unit(i_dev);
529 } else if (dsp_cdevs[i].query == DSP_CDEV_TYPE_RDONLY) {
530 if (dsp_cdevs[i].volctl != 0 &&
531 DSP_F_WRITE(flags)) {
532 volctl = DSP_CDEV_VOLCTL_READ;
533 flags &= ~FWRITE;
534 flags |= FREAD;
535 }
536 if (DSP_F_WRITE(flags)) {
537 (void)snd_clone_release(i_dev);
538 PCM_RELEASE_QUICK(d);
539 PCM_GIANT_EXIT(d);
540 return (ENOTSUP);
541 }
542 rdevunit = dev2unit(i_dev);
543 }
544 fmt = dsp_cdevs[i].fmt;
545 spd = dsp_cdevs[i].spd;
546 break;
547 }
548
549 /* No matching devtype? */
550 if (fmt == 0 || spd == 0)
551 panic("impossible devtype %d", devtype);
552
553 rdch = NULL;
554 wrch = NULL;
555 rderror = 0;
556 wrerror = 0;
557
558 /*
559 * if we get here, the open request is valid- either:
560 * * we were previously not open
561 * * we were open for play xor record and the opener wants
562 * the non-open direction
563 */
564 if (DSP_F_READ(flags)) {
565 /* open for read */
566 rderror = pcm_chnalloc(d, &rdch, PCMDIR_REC,
567 td->td_proc->p_pid, td->td_proc->p_comm, rdevunit);
568
569 if (rderror == 0 && chn_reset(rdch, fmt, spd) != 0)
570 rderror = ENXIO;
571
572 if (volctl == DSP_CDEV_VOLCTL_READ)
573 rderror = 0;
574
575 if (rderror != 0) {
576 if (rdch != NULL)
577 pcm_chnrelease(rdch);
578 if (!DSP_F_DUPLEX(flags)) {
579 (void)snd_clone_release(i_dev);
580 PCM_RELEASE_QUICK(d);
581 PCM_GIANT_EXIT(d);
582 return (rderror);
583 }
584 rdch = NULL;
585 } else if (volctl == DSP_CDEV_VOLCTL_READ) {
586 if (rdch != NULL) {
587 pcm_chnref(rdch, 1);
588 pcm_chnrelease(rdch);
589 }
590 } else {
591 if (flags & O_NONBLOCK)
592 rdch->flags |= CHN_F_NBIO;
593 if (flags & O_EXCL)
594 rdch->flags |= CHN_F_EXCLUSIVE;
595 pcm_chnref(rdch, 1);
596 if (volctl == DSP_CDEV_VOLCTL_NONE)
597 chn_vpc_reset(rdch, SND_VOL_C_PCM, 0);
598 CHN_UNLOCK(rdch);
599 }
600 }
601
602 if (DSP_F_WRITE(flags)) {
603 /* open for write */
604 wrerror = pcm_chnalloc(d, &wrch, PCMDIR_PLAY,
605 td->td_proc->p_pid, td->td_proc->p_comm, wdevunit);
606
607 if (wrerror == 0 && chn_reset(wrch, fmt, spd) != 0)
608 wrerror = ENXIO;
609
610 if (volctl == DSP_CDEV_VOLCTL_WRITE)
611 wrerror = 0;
612
613 if (wrerror != 0) {
614 if (wrch != NULL)
615 pcm_chnrelease(wrch);
616 if (!DSP_F_DUPLEX(flags)) {
617 if (rdch != NULL) {
618 /*
619 * Lock, deref and release previously
620 * created record channel
621 */
622 CHN_LOCK(rdch);
623 pcm_chnref(rdch, -1);
624 pcm_chnrelease(rdch);
625 }
626 (void)snd_clone_release(i_dev);
627 PCM_RELEASE_QUICK(d);
628 PCM_GIANT_EXIT(d);
629 return (wrerror);
630 }
631 wrch = NULL;
632 } else if (volctl == DSP_CDEV_VOLCTL_WRITE) {
633 if (wrch != NULL) {
634 pcm_chnref(wrch, 1);
635 pcm_chnrelease(wrch);
636 }
637 } else {
638 if (flags & O_NONBLOCK)
639 wrch->flags |= CHN_F_NBIO;
640 if (flags & O_EXCL)
641 wrch->flags |= CHN_F_EXCLUSIVE;
642 pcm_chnref(wrch, 1);
643 if (volctl == DSP_CDEV_VOLCTL_NONE)
644 chn_vpc_reset(wrch, SND_VOL_C_PCM, 0);
645 CHN_UNLOCK(wrch);
646 }
647 }
648
649
650 PCM_LOCK(d);
651
652 /*
653 * We're done. Allocate channels information for this cdev.
654 */
655 switch (volctl) {
656 case DSP_CDEV_VOLCTL_READ:
657 KASSERT(wrch == NULL, ("wrch=%p not null!", wrch));
658 dsp_cdevinfo_alloc(i_dev, NULL, NULL, rdch);
659 break;
660 case DSP_CDEV_VOLCTL_WRITE:
661 KASSERT(rdch == NULL, ("rdch=%p not null!", rdch));
662 dsp_cdevinfo_alloc(i_dev, NULL, NULL, wrch);
663 break;
664 case DSP_CDEV_VOLCTL_NONE:
665 default:
666 if (wrch == NULL && rdch == NULL) {
667 (void)snd_clone_release(i_dev);
668 PCM_RELEASE(d);
669 PCM_UNLOCK(d);
670 PCM_GIANT_EXIT(d);
671 if (wrerror != 0)
672 return (wrerror);
673 if (rderror != 0)
674 return (rderror);
675 return (EINVAL);
676 }
677 dsp_cdevinfo_alloc(i_dev, rdch, wrch, NULL);
678 if (rdch != NULL)
679 CHN_INSERT_HEAD(d, rdch, channels.pcm.opened);
680 if (wrch != NULL)
681 CHN_INSERT_HEAD(d, wrch, channels.pcm.opened);
682 break;
683 }
684
685 /*
686 * Increase clone refcount for its automatic garbage collector.
687 */
688 (void)snd_clone_ref(i_dev);
689
690 PCM_RELEASE(d);
691 PCM_UNLOCK(d);
692
693 PCM_GIANT_LEAVE(d);
694
695 return (0);
696 }
697
698 static int
699 dsp_close(struct cdev *i_dev, int flags, int mode, struct thread *td)
700 {
701 struct pcm_channel *rdch, *wrch, *volch;
702 struct snddev_info *d;
703 int sg_ids, rdref, wdref;
704
705 d = dsp_get_info(i_dev);
706 if (!DSP_REGISTERED(d, i_dev))
707 return (EBADF);
708
709 PCM_GIANT_ENTER(d);
710
711 PCM_LOCK(d);
712 PCM_WAIT(d);
713 PCM_ACQUIRE(d);
714
715 rdch = PCM_RDCH(i_dev);
716 wrch = PCM_WRCH(i_dev);
717 volch = PCM_VOLCH(i_dev);
718
719 PCM_RDCH(i_dev) = NULL;
720 PCM_WRCH(i_dev) = NULL;
721 PCM_VOLCH(i_dev) = NULL;
722
723 rdref = -1;
724 wdref = -1;
725
726 if (volch != NULL) {
727 if (volch == rdch)
728 rdref--;
729 else if (volch == wrch)
730 wdref--;
731 else {
732 CHN_LOCK(volch);
733 pcm_chnref(volch, -1);
734 CHN_UNLOCK(volch);
735 }
736 }
737
738 if (rdch != NULL)
739 CHN_REMOVE(d, rdch, channels.pcm.opened);
740 if (wrch != NULL)
741 CHN_REMOVE(d, wrch, channels.pcm.opened);
742
743 if (rdch != NULL || wrch != NULL) {
744 PCM_UNLOCK(d);
745 if (rdch != NULL) {
746 /*
747 * The channel itself need not be locked because:
748 * a) Adding a channel to a syncgroup happens only
749 * in dsp_ioctl(), which cannot run concurrently
750 * to dsp_close().
751 * b) The syncmember pointer (sm) is protected by
752 * the global syncgroup list lock.
753 * c) A channel can't just disappear, invalidating
754 * pointers, unless it's closed/dereferenced
755 * first.
756 */
757 PCM_SG_LOCK();
758 sg_ids = chn_syncdestroy(rdch);
759 PCM_SG_UNLOCK();
760 if (sg_ids != 0)
761 free_unr(pcmsg_unrhdr, sg_ids);
762
763 CHN_LOCK(rdch);
764 pcm_chnref(rdch, rdref);
765 chn_abort(rdch); /* won't sleep */
766 rdch->flags &= ~(CHN_F_RUNNING | CHN_F_MMAP |
767 CHN_F_DEAD | CHN_F_EXCLUSIVE);
768 chn_reset(rdch, 0, 0);
769 pcm_chnrelease(rdch);
770 }
771 if (wrch != NULL) {
772 /*
773 * Please see block above.
774 */
775 PCM_SG_LOCK();
776 sg_ids = chn_syncdestroy(wrch);
777 PCM_SG_UNLOCK();
778 if (sg_ids != 0)
779 free_unr(pcmsg_unrhdr, sg_ids);
780
781 CHN_LOCK(wrch);
782 pcm_chnref(wrch, wdref);
783 chn_flush(wrch); /* may sleep */
784 wrch->flags &= ~(CHN_F_RUNNING | CHN_F_MMAP |
785 CHN_F_DEAD | CHN_F_EXCLUSIVE);
786 chn_reset(wrch, 0, 0);
787 pcm_chnrelease(wrch);
788 }
789 PCM_LOCK(d);
790 }
791
792 dsp_cdevinfo_free(i_dev);
793 /*
794 * Release clone busy state and unref it so the automatic
795 * garbage collector will get the hint and do the remaining
796 * cleanup process.
797 */
798 (void)snd_clone_release(i_dev);
799
800 /*
801 * destroy_dev() might sleep, so release pcm lock
802 * here and rely on pcm cv serialization.
803 */
804 PCM_UNLOCK(d);
805 (void)snd_clone_unref(i_dev);
806 PCM_LOCK(d);
807
808 PCM_RELEASE(d);
809 PCM_UNLOCK(d);
810
811 PCM_GIANT_LEAVE(d);
812
813 return (0);
814 }
815
816 static __inline int
817 dsp_io_ops(struct cdev *i_dev, struct uio *buf)
818 {
819 struct snddev_info *d;
820 struct pcm_channel **ch, *rdch, *wrch;
821 int (*chn_io)(struct pcm_channel *, struct uio *);
822 int prio, ret;
823 pid_t runpid;
824
825 KASSERT(i_dev != NULL && buf != NULL &&
826 (buf->uio_rw == UIO_READ || buf->uio_rw == UIO_WRITE),
827 ("%s(): io train wreck!", __func__));
828
829 d = dsp_get_info(i_dev);
830 if (PCM_DETACHING(d) || !DSP_REGISTERED(d, i_dev))
831 return (EBADF);
832
833 PCM_GIANT_ENTER(d);
834
835 switch (buf->uio_rw) {
836 case UIO_READ:
837 prio = SD_F_PRIO_RD;
838 ch = &rdch;
839 chn_io = chn_read;
840 break;
841 case UIO_WRITE:
842 prio = SD_F_PRIO_WR;
843 ch = &wrch;
844 chn_io = chn_write;
845 break;
846 default:
847 panic("invalid/corrupted uio direction: %d", buf->uio_rw);
848 break;
849 }
850
851 rdch = NULL;
852 wrch = NULL;
853 runpid = buf->uio_td->td_proc->p_pid;
854
855 getchns(i_dev, &rdch, &wrch, prio);
856
857 if (*ch == NULL || !((*ch)->flags & CHN_F_BUSY)) {
858 PCM_GIANT_EXIT(d);
859 return (EBADF);
860 }
861
862 if (((*ch)->flags & (CHN_F_MMAP | CHN_F_DEAD)) ||
863 (((*ch)->flags & CHN_F_RUNNING) && (*ch)->pid != runpid)) {
864 relchns(i_dev, rdch, wrch, prio);
865 PCM_GIANT_EXIT(d);
866 return (EINVAL);
867 } else if (!((*ch)->flags & CHN_F_RUNNING)) {
868 (*ch)->flags |= CHN_F_RUNNING;
869 (*ch)->pid = runpid;
870 }
871
872 /*
873 * chn_read/write must give up channel lock in order to copy bytes
874 * from/to userland, so up the "in progress" counter to make sure
875 * someone else doesn't come along and muss up the buffer.
876 */
877 ++(*ch)->inprog;
878 ret = chn_io(*ch, buf);
879 --(*ch)->inprog;
880
881 CHN_BROADCAST(&(*ch)->cv);
882
883 relchns(i_dev, rdch, wrch, prio);
884
885 PCM_GIANT_LEAVE(d);
886
887 return (ret);
888 }
889
890 static int
891 dsp_read(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_write(struct cdev *i_dev, struct uio *buf, int flag)
898 {
899 return (dsp_io_ops(i_dev, buf));
900 }
901
902 static int
903 dsp_get_volume_channel(struct cdev *dev, struct pcm_channel **volch)
904 {
905 struct snddev_info *d;
906 struct pcm_channel *c;
907 int unit;
908
909 KASSERT(dev != NULL && volch != NULL,
910 ("%s(): NULL query dev=%p volch=%p", __func__, dev, volch));
911
912 d = dsp_get_info(dev);
913 if (!PCM_REGISTERED(d)) {
914 *volch = NULL;
915 return (EINVAL);
916 }
917
918 PCM_UNLOCKASSERT(d);
919
920 *volch = NULL;
921
922 c = PCM_VOLCH(dev);
923 if (c != NULL) {
924 if (!(c->feederflags & (1 << FEEDER_VOLUME)))
925 return (-1);
926 *volch = c;
927 return (0);
928 }
929
930 PCM_LOCK(d);
931 PCM_WAIT(d);
932 PCM_ACQUIRE(d);
933
934 unit = dev2unit(dev);
935
936 CHN_FOREACH(c, d, channels.pcm) {
937 CHN_LOCK(c);
938 if (c->unit != unit) {
939 CHN_UNLOCK(c);
940 continue;
941 }
942 *volch = c;
943 pcm_chnref(c, 1);
944 PCM_VOLCH(dev) = c;
945 CHN_UNLOCK(c);
946 PCM_RELEASE(d);
947 PCM_UNLOCK(d);
948 return ((c->feederflags & (1 << FEEDER_VOLUME)) ? 0 : -1);
949 }
950
951 PCM_RELEASE(d);
952 PCM_UNLOCK(d);
953
954 return (EINVAL);
955 }
956
957 static int
958 dsp_ioctl_channel(struct cdev *dev, struct pcm_channel *volch, u_long cmd,
959 caddr_t arg)
960 {
961 struct snddev_info *d;
962 struct pcm_channel *rdch, *wrch;
963 int j, devtype, ret;
964
965 d = dsp_get_info(dev);
966 if (!PCM_REGISTERED(d) || !(dsp_get_flags(dev) & SD_F_VPC))
967 return (-1);
968
969 PCM_UNLOCKASSERT(d);
970
971 j = cmd & 0xff;
972
973 rdch = PCM_RDCH(dev);
974 wrch = PCM_WRCH(dev);
975
976 /* No specific channel, look into cache */
977 if (volch == NULL)
978 volch = PCM_VOLCH(dev);
979
980 /* Look harder */
981 if (volch == NULL) {
982 if (j == SOUND_MIXER_RECLEV && rdch != NULL)
983 volch = rdch;
984 else if (j == SOUND_MIXER_PCM && wrch != NULL)
985 volch = wrch;
986 }
987
988 devtype = PCMDEV(dev);
989
990 /* Look super harder */
991 if (volch == NULL &&
992 (devtype == SND_DEV_DSPHW_PLAY || devtype == SND_DEV_DSPHW_VPLAY ||
993 devtype == SND_DEV_DSPHW_REC || devtype == SND_DEV_DSPHW_VREC)) {
994 ret = dsp_get_volume_channel(dev, &volch);
995 if (ret != 0)
996 return (ret);
997 if (volch == NULL)
998 return (EINVAL);
999 }
1000
1001 /* Final validation */
1002 if (volch != NULL) {
1003 CHN_LOCK(volch);
1004 if (!(volch->feederflags & (1 << FEEDER_VOLUME))) {
1005 CHN_UNLOCK(volch);
1006 return (-1);
1007 }
1008 if (volch->direction == PCMDIR_PLAY)
1009 wrch = volch;
1010 else
1011 rdch = volch;
1012 }
1013
1014 ret = EINVAL;
1015
1016 if (volch != NULL &&
1017 ((j == SOUND_MIXER_PCM && volch->direction == PCMDIR_PLAY) ||
1018 (j == SOUND_MIXER_RECLEV && volch->direction == PCMDIR_REC))) {
1019 if ((cmd & ~0xff) == MIXER_WRITE(0)) {
1020 int left, right, center;
1021
1022 left = *(int *)arg & 0x7f;
1023 right = ((*(int *)arg) >> 8) & 0x7f;
1024 center = (left + right) >> 1;
1025 chn_setvolume_multi(volch, SND_VOL_C_PCM, left, right,
1026 center);
1027 } else if ((cmd & ~0xff) == MIXER_READ(0)) {
1028 *(int *)arg = CHN_GETVOLUME(volch,
1029 SND_VOL_C_PCM, SND_CHN_T_FL);
1030 *(int *)arg |= CHN_GETVOLUME(volch,
1031 SND_VOL_C_PCM, SND_CHN_T_FR) << 8;
1032 }
1033 ret = 0;
1034 } else if (rdch != NULL || wrch != NULL) {
1035 switch (j) {
1036 case SOUND_MIXER_DEVMASK:
1037 case SOUND_MIXER_CAPS:
1038 case SOUND_MIXER_STEREODEVS:
1039 if ((cmd & ~0xff) == MIXER_READ(0)) {
1040 *(int *)arg = 0;
1041 if (rdch != NULL)
1042 *(int *)arg |= SOUND_MASK_RECLEV;
1043 if (wrch != NULL)
1044 *(int *)arg |= SOUND_MASK_PCM;
1045 }
1046 ret = 0;
1047 break;
1048 case SOUND_MIXER_RECMASK:
1049 case SOUND_MIXER_RECSRC:
1050 if ((cmd & ~0xff) == MIXER_READ(0))
1051 *(int *)arg = 0;
1052 ret = 0;
1053 break;
1054 default:
1055 break;
1056 }
1057 }
1058
1059 if (volch != NULL)
1060 CHN_UNLOCK(volch);
1061
1062 return (ret);
1063 }
1064
1065 static int
1066 dsp_ioctl(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode,
1067 struct thread *td)
1068 {
1069 struct pcm_channel *chn, *rdch, *wrch;
1070 struct snddev_info *d;
1071 u_long xcmd;
1072 int *arg_i, ret, tmp;
1073
1074 d = dsp_get_info(i_dev);
1075 if (PCM_DETACHING(d) || !DSP_REGISTERED(d, i_dev))
1076 return (EBADF);
1077
1078 PCM_GIANT_ENTER(d);
1079
1080 arg_i = (int *)arg;
1081 ret = 0;
1082 xcmd = 0;
1083 chn = NULL;
1084
1085 if (IOCGROUP(cmd) == 'M') {
1086 if (cmd == OSS_GETVERSION) {
1087 *arg_i = SOUND_VERSION;
1088 PCM_GIANT_EXIT(d);
1089 return (0);
1090 }
1091 ret = dsp_ioctl_channel(i_dev, PCM_VOLCH(i_dev), cmd, arg);
1092 if (ret != -1) {
1093 PCM_GIANT_EXIT(d);
1094 return (ret);
1095 }
1096
1097 if (d->mixer_dev != NULL) {
1098 PCM_ACQUIRE_QUICK(d);
1099 ret = mixer_ioctl_cmd(d->mixer_dev, cmd, arg, -1, td,
1100 MIXER_CMD_DIRECT);
1101 PCM_RELEASE_QUICK(d);
1102 } else
1103 ret = EBADF;
1104
1105 PCM_GIANT_EXIT(d);
1106
1107 return (ret);
1108 }
1109
1110 /*
1111 * Certain ioctls may be made on any type of device (audio, mixer,
1112 * and MIDI). Handle those special cases here.
1113 */
1114 if (IOCGROUP(cmd) == 'X') {
1115 PCM_ACQUIRE_QUICK(d);
1116 switch(cmd) {
1117 case SNDCTL_SYSINFO:
1118 sound_oss_sysinfo((oss_sysinfo *)arg);
1119 break;
1120 case SNDCTL_CARDINFO:
1121 ret = sound_oss_card_info((oss_card_info *)arg);
1122 break;
1123 case SNDCTL_AUDIOINFO:
1124 case SNDCTL_AUDIOINFO_EX:
1125 case SNDCTL_ENGINEINFO:
1126 ret = dsp_oss_audioinfo(i_dev, (oss_audioinfo *)arg);
1127 break;
1128 case SNDCTL_MIXERINFO:
1129 ret = mixer_oss_mixerinfo(i_dev, (oss_mixerinfo *)arg);
1130 break;
1131 default:
1132 ret = EINVAL;
1133 }
1134 PCM_RELEASE_QUICK(d);
1135 PCM_GIANT_EXIT(d);
1136 return (ret);
1137 }
1138
1139 getchns(i_dev, &rdch, &wrch, 0);
1140
1141 if (wrch != NULL && (wrch->flags & CHN_F_DEAD))
1142 wrch = NULL;
1143 if (rdch != NULL && (rdch->flags & CHN_F_DEAD))
1144 rdch = NULL;
1145
1146 if (wrch == NULL && rdch == NULL) {
1147 PCM_GIANT_EXIT(d);
1148 return (EINVAL);
1149 }
1150
1151 switch(cmd) {
1152 #ifdef OLDPCM_IOCTL
1153 /*
1154 * we start with the new ioctl interface.
1155 */
1156 case AIONWRITE: /* how many bytes can write ? */
1157 if (wrch) {
1158 CHN_LOCK(wrch);
1159 /*
1160 if (wrch && wrch->bufhard.dl)
1161 while (chn_wrfeed(wrch) == 0);
1162 */
1163 *arg_i = sndbuf_getfree(wrch->bufsoft);
1164 CHN_UNLOCK(wrch);
1165 } else {
1166 *arg_i = 0;
1167 ret = EINVAL;
1168 }
1169 break;
1170
1171 case AIOSSIZE: /* set the current blocksize */
1172 {
1173 struct snd_size *p = (struct snd_size *)arg;
1174
1175 p->play_size = 0;
1176 p->rec_size = 0;
1177 PCM_ACQUIRE_QUICK(d);
1178 if (wrch) {
1179 CHN_LOCK(wrch);
1180 chn_setblocksize(wrch, 2, p->play_size);
1181 p->play_size = sndbuf_getblksz(wrch->bufsoft);
1182 CHN_UNLOCK(wrch);
1183 }
1184 if (rdch) {
1185 CHN_LOCK(rdch);
1186 chn_setblocksize(rdch, 2, p->rec_size);
1187 p->rec_size = sndbuf_getblksz(rdch->bufsoft);
1188 CHN_UNLOCK(rdch);
1189 }
1190 PCM_RELEASE_QUICK(d);
1191 }
1192 break;
1193 case AIOGSIZE: /* get the current blocksize */
1194 {
1195 struct snd_size *p = (struct snd_size *)arg;
1196
1197 if (wrch) {
1198 CHN_LOCK(wrch);
1199 p->play_size = sndbuf_getblksz(wrch->bufsoft);
1200 CHN_UNLOCK(wrch);
1201 }
1202 if (rdch) {
1203 CHN_LOCK(rdch);
1204 p->rec_size = sndbuf_getblksz(rdch->bufsoft);
1205 CHN_UNLOCK(rdch);
1206 }
1207 }
1208 break;
1209
1210 case AIOSFMT:
1211 case AIOGFMT:
1212 {
1213 snd_chan_param *p = (snd_chan_param *)arg;
1214
1215 if (cmd == AIOSFMT &&
1216 ((p->play_format != 0 && p->play_rate == 0) ||
1217 (p->rec_format != 0 && p->rec_rate == 0))) {
1218 ret = EINVAL;
1219 break;
1220 }
1221 PCM_ACQUIRE_QUICK(d);
1222 if (wrch) {
1223 CHN_LOCK(wrch);
1224 if (cmd == AIOSFMT && p->play_format != 0) {
1225 chn_setformat(wrch,
1226 SND_FORMAT(p->play_format,
1227 AFMT_CHANNEL(wrch->format),
1228 AFMT_EXTCHANNEL(wrch->format)));
1229 chn_setspeed(wrch, p->play_rate);
1230 }
1231 p->play_rate = wrch->speed;
1232 p->play_format = AFMT_ENCODING(wrch->format);
1233 CHN_UNLOCK(wrch);
1234 } else {
1235 p->play_rate = 0;
1236 p->play_format = 0;
1237 }
1238 if (rdch) {
1239 CHN_LOCK(rdch);
1240 if (cmd == AIOSFMT && p->rec_format != 0) {
1241 chn_setformat(rdch,
1242 SND_FORMAT(p->rec_format,
1243 AFMT_CHANNEL(rdch->format),
1244 AFMT_EXTCHANNEL(rdch->format)));
1245 chn_setspeed(rdch, p->rec_rate);
1246 }
1247 p->rec_rate = rdch->speed;
1248 p->rec_format = AFMT_ENCODING(rdch->format);
1249 CHN_UNLOCK(rdch);
1250 } else {
1251 p->rec_rate = 0;
1252 p->rec_format = 0;
1253 }
1254 PCM_RELEASE_QUICK(d);
1255 }
1256 break;
1257
1258 case AIOGCAP: /* get capabilities */
1259 {
1260 snd_capabilities *p = (snd_capabilities *)arg;
1261 struct pcmchan_caps *pcaps = NULL, *rcaps = NULL;
1262 struct cdev *pdev;
1263
1264 PCM_LOCK(d);
1265 if (rdch) {
1266 CHN_LOCK(rdch);
1267 rcaps = chn_getcaps(rdch);
1268 }
1269 if (wrch) {
1270 CHN_LOCK(wrch);
1271 pcaps = chn_getcaps(wrch);
1272 }
1273 p->rate_min = max(rcaps? rcaps->minspeed : 0,
1274 pcaps? pcaps->minspeed : 0);
1275 p->rate_max = min(rcaps? rcaps->maxspeed : 1000000,
1276 pcaps? pcaps->maxspeed : 1000000);
1277 p->bufsize = min(rdch? sndbuf_getsize(rdch->bufsoft) : 1000000,
1278 wrch? sndbuf_getsize(wrch->bufsoft) : 1000000);
1279 /* XXX bad on sb16 */
1280 p->formats = (rdch? chn_getformats(rdch) : 0xffffffff) &
1281 (wrch? chn_getformats(wrch) : 0xffffffff);
1282 if (rdch && wrch)
1283 p->formats |= (dsp_get_flags(i_dev) & SD_F_SIMPLEX)? 0 : AFMT_FULLDUPLEX;
1284 pdev = d->mixer_dev;
1285 p->mixers = 1; /* default: one mixer */
1286 p->inputs = pdev->si_drv1? mix_getdevs(pdev->si_drv1) : 0;
1287 p->left = p->right = 100;
1288 if (wrch)
1289 CHN_UNLOCK(wrch);
1290 if (rdch)
1291 CHN_UNLOCK(rdch);
1292 PCM_UNLOCK(d);
1293 }
1294 break;
1295
1296 case AIOSTOP:
1297 if (*arg_i == AIOSYNC_PLAY && wrch) {
1298 CHN_LOCK(wrch);
1299 *arg_i = chn_abort(wrch);
1300 CHN_UNLOCK(wrch);
1301 } else if (*arg_i == AIOSYNC_CAPTURE && rdch) {
1302 CHN_LOCK(rdch);
1303 *arg_i = chn_abort(rdch);
1304 CHN_UNLOCK(rdch);
1305 } else {
1306 printf("AIOSTOP: bad channel 0x%x\n", *arg_i);
1307 *arg_i = 0;
1308 }
1309 break;
1310
1311 case AIOSYNC:
1312 printf("AIOSYNC chan 0x%03lx pos %lu unimplemented\n",
1313 ((snd_sync_parm *)arg)->chan, ((snd_sync_parm *)arg)->pos);
1314 break;
1315 #endif
1316 /*
1317 * here follow the standard ioctls (filio.h etc.)
1318 */
1319 case FIONREAD: /* get # bytes to read */
1320 if (rdch) {
1321 CHN_LOCK(rdch);
1322 /* if (rdch && rdch->bufhard.dl)
1323 while (chn_rdfeed(rdch) == 0);
1324 */
1325 *arg_i = sndbuf_getready(rdch->bufsoft);
1326 CHN_UNLOCK(rdch);
1327 } else {
1328 *arg_i = 0;
1329 ret = EINVAL;
1330 }
1331 break;
1332
1333 case FIOASYNC: /*set/clear async i/o */
1334 DEB( printf("FIOASYNC\n") ; )
1335 break;
1336
1337 case SNDCTL_DSP_NONBLOCK: /* set non-blocking i/o */
1338 case FIONBIO: /* set/clear non-blocking i/o */
1339 if (rdch) {
1340 CHN_LOCK(rdch);
1341 if (cmd == SNDCTL_DSP_NONBLOCK || *arg_i)
1342 rdch->flags |= CHN_F_NBIO;
1343 else
1344 rdch->flags &= ~CHN_F_NBIO;
1345 CHN_UNLOCK(rdch);
1346 }
1347 if (wrch) {
1348 CHN_LOCK(wrch);
1349 if (cmd == SNDCTL_DSP_NONBLOCK || *arg_i)
1350 wrch->flags |= CHN_F_NBIO;
1351 else
1352 wrch->flags &= ~CHN_F_NBIO;
1353 CHN_UNLOCK(wrch);
1354 }
1355 break;
1356
1357 /*
1358 * Finally, here is the linux-compatible ioctl interface
1359 */
1360 #define THE_REAL_SNDCTL_DSP_GETBLKSIZE _IOWR('P', 4, int)
1361 case THE_REAL_SNDCTL_DSP_GETBLKSIZE:
1362 case SNDCTL_DSP_GETBLKSIZE:
1363 chn = wrch ? wrch : rdch;
1364 if (chn) {
1365 CHN_LOCK(chn);
1366 *arg_i = sndbuf_getblksz(chn->bufsoft);
1367 CHN_UNLOCK(chn);
1368 } else {
1369 *arg_i = 0;
1370 ret = EINVAL;
1371 }
1372 break;
1373
1374 case SNDCTL_DSP_SETBLKSIZE:
1375 RANGE(*arg_i, 16, 65536);
1376 PCM_ACQUIRE_QUICK(d);
1377 if (wrch) {
1378 CHN_LOCK(wrch);
1379 chn_setblocksize(wrch, 2, *arg_i);
1380 CHN_UNLOCK(wrch);
1381 }
1382 if (rdch) {
1383 CHN_LOCK(rdch);
1384 chn_setblocksize(rdch, 2, *arg_i);
1385 CHN_UNLOCK(rdch);
1386 }
1387 PCM_RELEASE_QUICK(d);
1388 break;
1389
1390 case SNDCTL_DSP_RESET:
1391 DEB(printf("dsp reset\n"));
1392 if (wrch) {
1393 CHN_LOCK(wrch);
1394 chn_abort(wrch);
1395 chn_resetbuf(wrch);
1396 CHN_UNLOCK(wrch);
1397 }
1398 if (rdch) {
1399 CHN_LOCK(rdch);
1400 chn_abort(rdch);
1401 chn_resetbuf(rdch);
1402 CHN_UNLOCK(rdch);
1403 }
1404 break;
1405
1406 case SNDCTL_DSP_SYNC:
1407 DEB(printf("dsp sync\n"));
1408 /* chn_sync may sleep */
1409 if (wrch) {
1410 CHN_LOCK(wrch);
1411 chn_sync(wrch, 0);
1412 CHN_UNLOCK(wrch);
1413 }
1414 break;
1415
1416 case SNDCTL_DSP_SPEED:
1417 /* chn_setspeed may sleep */
1418 tmp = 0;
1419 PCM_ACQUIRE_QUICK(d);
1420 if (wrch) {
1421 CHN_LOCK(wrch);
1422 ret = chn_setspeed(wrch, *arg_i);
1423 tmp = wrch->speed;
1424 CHN_UNLOCK(wrch);
1425 }
1426 if (rdch && ret == 0) {
1427 CHN_LOCK(rdch);
1428 ret = chn_setspeed(rdch, *arg_i);
1429 if (tmp == 0)
1430 tmp = rdch->speed;
1431 CHN_UNLOCK(rdch);
1432 }
1433 PCM_RELEASE_QUICK(d);
1434 *arg_i = tmp;
1435 break;
1436
1437 case SOUND_PCM_READ_RATE:
1438 chn = wrch ? wrch : rdch;
1439 if (chn) {
1440 CHN_LOCK(chn);
1441 *arg_i = chn->speed;
1442 CHN_UNLOCK(chn);
1443 } else {
1444 *arg_i = 0;
1445 ret = EINVAL;
1446 }
1447 break;
1448
1449 case SNDCTL_DSP_STEREO:
1450 tmp = -1;
1451 *arg_i = (*arg_i)? 2 : 1;
1452 PCM_ACQUIRE_QUICK(d);
1453 if (wrch) {
1454 CHN_LOCK(wrch);
1455 ret = chn_setformat(wrch,
1456 SND_FORMAT(wrch->format, *arg_i, 0));
1457 tmp = (AFMT_CHANNEL(wrch->format) > 1)? 1 : 0;
1458 CHN_UNLOCK(wrch);
1459 }
1460 if (rdch && ret == 0) {
1461 CHN_LOCK(rdch);
1462 ret = chn_setformat(rdch,
1463 SND_FORMAT(rdch->format, *arg_i, 0));
1464 if (tmp == -1)
1465 tmp = (AFMT_CHANNEL(rdch->format) > 1)? 1 : 0;
1466 CHN_UNLOCK(rdch);
1467 }
1468 PCM_RELEASE_QUICK(d);
1469 *arg_i = tmp;
1470 break;
1471
1472 case SOUND_PCM_WRITE_CHANNELS:
1473 /* case SNDCTL_DSP_CHANNELS: ( == SOUND_PCM_WRITE_CHANNELS) */
1474 if (*arg_i < 0) {
1475 *arg_i = 0;
1476 ret = EINVAL;
1477 break;
1478 }
1479 if (*arg_i != 0) {
1480 struct pcmchan_matrix *m;
1481 uint32_t ext;
1482
1483 tmp = 0;
1484 if (*arg_i > SND_CHN_MAX)
1485 *arg_i = SND_CHN_MAX;
1486
1487 m = feeder_matrix_default_channel_map(*arg_i);
1488 if (m != NULL)
1489 ext = m->ext;
1490 else
1491 ext = 0;
1492
1493 PCM_ACQUIRE_QUICK(d);
1494 if (wrch) {
1495 CHN_LOCK(wrch);
1496 ret = chn_setformat(wrch,
1497 SND_FORMAT(wrch->format, *arg_i, ext));
1498 tmp = AFMT_CHANNEL(wrch->format);
1499 CHN_UNLOCK(wrch);
1500 }
1501 if (rdch && ret == 0) {
1502 CHN_LOCK(rdch);
1503 ret = chn_setformat(rdch,
1504 SND_FORMAT(rdch->format, *arg_i, ext));
1505 if (tmp == 0)
1506 tmp = AFMT_CHANNEL(rdch->format);
1507 CHN_UNLOCK(rdch);
1508 }
1509 PCM_RELEASE_QUICK(d);
1510 *arg_i = tmp;
1511 } else {
1512 chn = wrch ? wrch : rdch;
1513 CHN_LOCK(chn);
1514 *arg_i = AFMT_CHANNEL(chn->format);
1515 CHN_UNLOCK(chn);
1516 }
1517 break;
1518
1519 case SOUND_PCM_READ_CHANNELS:
1520 chn = wrch ? wrch : rdch;
1521 if (chn) {
1522 CHN_LOCK(chn);
1523 *arg_i = AFMT_CHANNEL(chn->format);
1524 CHN_UNLOCK(chn);
1525 } else {
1526 *arg_i = 0;
1527 ret = EINVAL;
1528 }
1529 break;
1530
1531 case SNDCTL_DSP_GETFMTS: /* returns a mask of supported fmts */
1532 chn = wrch ? wrch : rdch;
1533 if (chn) {
1534 CHN_LOCK(chn);
1535 *arg_i = chn_getformats(chn);
1536 CHN_UNLOCK(chn);
1537 } else {
1538 *arg_i = 0;
1539 ret = EINVAL;
1540 }
1541 break;
1542
1543 case SNDCTL_DSP_SETFMT: /* sets _one_ format */
1544 if (*arg_i != AFMT_QUERY) {
1545 tmp = 0;
1546 PCM_ACQUIRE_QUICK(d);
1547 if (wrch) {
1548 CHN_LOCK(wrch);
1549 ret = chn_setformat(wrch, SND_FORMAT(*arg_i,
1550 AFMT_CHANNEL(wrch->format),
1551 AFMT_EXTCHANNEL(wrch->format)));
1552 tmp = wrch->format;
1553 CHN_UNLOCK(wrch);
1554 }
1555 if (rdch && ret == 0) {
1556 CHN_LOCK(rdch);
1557 ret = chn_setformat(rdch, SND_FORMAT(*arg_i,
1558 AFMT_CHANNEL(rdch->format),
1559 AFMT_EXTCHANNEL(rdch->format)));
1560 if (tmp == 0)
1561 tmp = rdch->format;
1562 CHN_UNLOCK(rdch);
1563 }
1564 PCM_RELEASE_QUICK(d);
1565 *arg_i = AFMT_ENCODING(tmp);
1566 } else {
1567 chn = wrch ? wrch : rdch;
1568 CHN_LOCK(chn);
1569 *arg_i = AFMT_ENCODING(chn->format);
1570 CHN_UNLOCK(chn);
1571 }
1572 break;
1573
1574 case SNDCTL_DSP_SETFRAGMENT:
1575 DEB(printf("SNDCTL_DSP_SETFRAGMENT 0x%08x\n", *(int *)arg));
1576 {
1577 uint32_t fragln = (*arg_i) & 0x0000ffff;
1578 uint32_t maxfrags = ((*arg_i) & 0xffff0000) >> 16;
1579 uint32_t fragsz;
1580 uint32_t r_maxfrags, r_fragsz;
1581
1582 RANGE(fragln, 4, 16);
1583 fragsz = 1 << fragln;
1584
1585 if (maxfrags == 0)
1586 maxfrags = CHN_2NDBUFMAXSIZE / fragsz;
1587 if (maxfrags < 2)
1588 maxfrags = 2;
1589 if (maxfrags * fragsz > CHN_2NDBUFMAXSIZE)
1590 maxfrags = CHN_2NDBUFMAXSIZE / fragsz;
1591
1592 DEB(printf("SNDCTL_DSP_SETFRAGMENT %d frags, %d sz\n", maxfrags, fragsz));
1593 PCM_ACQUIRE_QUICK(d);
1594 if (rdch) {
1595 CHN_LOCK(rdch);
1596 ret = chn_setblocksize(rdch, maxfrags, fragsz);
1597 r_maxfrags = sndbuf_getblkcnt(rdch->bufsoft);
1598 r_fragsz = sndbuf_getblksz(rdch->bufsoft);
1599 CHN_UNLOCK(rdch);
1600 } else {
1601 r_maxfrags = maxfrags;
1602 r_fragsz = fragsz;
1603 }
1604 if (wrch && ret == 0) {
1605 CHN_LOCK(wrch);
1606 ret = chn_setblocksize(wrch, maxfrags, fragsz);
1607 maxfrags = sndbuf_getblkcnt(wrch->bufsoft);
1608 fragsz = sndbuf_getblksz(wrch->bufsoft);
1609 CHN_UNLOCK(wrch);
1610 } else { /* use whatever came from the read channel */
1611 maxfrags = r_maxfrags;
1612 fragsz = r_fragsz;
1613 }
1614 PCM_RELEASE_QUICK(d);
1615
1616 fragln = 0;
1617 while (fragsz > 1) {
1618 fragln++;
1619 fragsz >>= 1;
1620 }
1621 *arg_i = (maxfrags << 16) | fragln;
1622 }
1623 break;
1624
1625 case SNDCTL_DSP_GETISPACE:
1626 /* return the size of data available in the input queue */
1627 {
1628 audio_buf_info *a = (audio_buf_info *)arg;
1629 if (rdch) {
1630 struct snd_dbuf *bs = rdch->bufsoft;
1631
1632 CHN_LOCK(rdch);
1633 a->bytes = sndbuf_getready(bs);
1634 a->fragments = a->bytes / sndbuf_getblksz(bs);
1635 a->fragstotal = sndbuf_getblkcnt(bs);
1636 a->fragsize = sndbuf_getblksz(bs);
1637 CHN_UNLOCK(rdch);
1638 } else
1639 ret = EINVAL;
1640 }
1641 break;
1642
1643 case SNDCTL_DSP_GETOSPACE:
1644 /* return space available in the output queue */
1645 {
1646 audio_buf_info *a = (audio_buf_info *)arg;
1647 if (wrch) {
1648 struct snd_dbuf *bs = wrch->bufsoft;
1649
1650 CHN_LOCK(wrch);
1651 /* XXX abusive DMA update: chn_wrupdate(wrch); */
1652 a->bytes = sndbuf_getfree(bs);
1653 a->fragments = a->bytes / sndbuf_getblksz(bs);
1654 a->fragstotal = sndbuf_getblkcnt(bs);
1655 a->fragsize = sndbuf_getblksz(bs);
1656 CHN_UNLOCK(wrch);
1657 } else
1658 ret = EINVAL;
1659 }
1660 break;
1661
1662 case SNDCTL_DSP_GETIPTR:
1663 {
1664 count_info *a = (count_info *)arg;
1665 if (rdch) {
1666 struct snd_dbuf *bs = rdch->bufsoft;
1667
1668 CHN_LOCK(rdch);
1669 /* XXX abusive DMA update: chn_rdupdate(rdch); */
1670 a->bytes = sndbuf_gettotal(bs);
1671 a->blocks = sndbuf_getblocks(bs) - rdch->blocks;
1672 a->ptr = sndbuf_getfreeptr(bs);
1673 rdch->blocks = sndbuf_getblocks(bs);
1674 CHN_UNLOCK(rdch);
1675 } else
1676 ret = EINVAL;
1677 }
1678 break;
1679
1680 case SNDCTL_DSP_GETOPTR:
1681 {
1682 count_info *a = (count_info *)arg;
1683 if (wrch) {
1684 struct snd_dbuf *bs = wrch->bufsoft;
1685
1686 CHN_LOCK(wrch);
1687 /* XXX abusive DMA update: chn_wrupdate(wrch); */
1688 a->bytes = sndbuf_gettotal(bs);
1689 a->blocks = sndbuf_getblocks(bs) - wrch->blocks;
1690 a->ptr = sndbuf_getreadyptr(bs);
1691 wrch->blocks = sndbuf_getblocks(bs);
1692 CHN_UNLOCK(wrch);
1693 } else
1694 ret = EINVAL;
1695 }
1696 break;
1697
1698 case SNDCTL_DSP_GETCAPS:
1699 PCM_LOCK(d);
1700 *arg_i = PCM_CAP_REALTIME | PCM_CAP_MMAP | PCM_CAP_TRIGGER;
1701 if (rdch && wrch && !(dsp_get_flags(i_dev) & SD_F_SIMPLEX))
1702 *arg_i |= PCM_CAP_DUPLEX;
1703 PCM_UNLOCK(d);
1704 break;
1705
1706 case SOUND_PCM_READ_BITS:
1707 chn = wrch ? wrch : rdch;
1708 if (chn) {
1709 CHN_LOCK(chn);
1710 if (chn->format & AFMT_8BIT)
1711 *arg_i = 8;
1712 else if (chn->format & AFMT_16BIT)
1713 *arg_i = 16;
1714 else if (chn->format & AFMT_24BIT)
1715 *arg_i = 24;
1716 else if (chn->format & AFMT_32BIT)
1717 *arg_i = 32;
1718 else
1719 ret = EINVAL;
1720 CHN_UNLOCK(chn);
1721 } else {
1722 *arg_i = 0;
1723 ret = EINVAL;
1724 }
1725 break;
1726
1727 case SNDCTL_DSP_SETTRIGGER:
1728 if (rdch) {
1729 CHN_LOCK(rdch);
1730 rdch->flags &= ~CHN_F_NOTRIGGER;
1731 if (*arg_i & PCM_ENABLE_INPUT)
1732 chn_start(rdch, 1);
1733 else {
1734 chn_abort(rdch);
1735 chn_resetbuf(rdch);
1736 rdch->flags |= CHN_F_NOTRIGGER;
1737 }
1738 CHN_UNLOCK(rdch);
1739 }
1740 if (wrch) {
1741 CHN_LOCK(wrch);
1742 wrch->flags &= ~CHN_F_NOTRIGGER;
1743 if (*arg_i & PCM_ENABLE_OUTPUT)
1744 chn_start(wrch, 1);
1745 else {
1746 chn_abort(wrch);
1747 chn_resetbuf(wrch);
1748 wrch->flags |= CHN_F_NOTRIGGER;
1749 }
1750 CHN_UNLOCK(wrch);
1751 }
1752 break;
1753
1754 case SNDCTL_DSP_GETTRIGGER:
1755 *arg_i = 0;
1756 if (wrch) {
1757 CHN_LOCK(wrch);
1758 if (wrch->flags & CHN_F_TRIGGERED)
1759 *arg_i |= PCM_ENABLE_OUTPUT;
1760 CHN_UNLOCK(wrch);
1761 }
1762 if (rdch) {
1763 CHN_LOCK(rdch);
1764 if (rdch->flags & CHN_F_TRIGGERED)
1765 *arg_i |= PCM_ENABLE_INPUT;
1766 CHN_UNLOCK(rdch);
1767 }
1768 break;
1769
1770 case SNDCTL_DSP_GETODELAY:
1771 if (wrch) {
1772 struct snd_dbuf *bs = wrch->bufsoft;
1773
1774 CHN_LOCK(wrch);
1775 /* XXX abusive DMA update: chn_wrupdate(wrch); */
1776 *arg_i = sndbuf_getready(bs);
1777 CHN_UNLOCK(wrch);
1778 } else
1779 ret = EINVAL;
1780 break;
1781
1782 case SNDCTL_DSP_POST:
1783 if (wrch) {
1784 CHN_LOCK(wrch);
1785 wrch->flags &= ~CHN_F_NOTRIGGER;
1786 chn_start(wrch, 1);
1787 CHN_UNLOCK(wrch);
1788 }
1789 break;
1790
1791 case SNDCTL_DSP_SETDUPLEX:
1792 /*
1793 * switch to full-duplex mode if card is in half-duplex
1794 * mode and is able to work in full-duplex mode
1795 */
1796 PCM_LOCK(d);
1797 if (rdch && wrch && (dsp_get_flags(i_dev) & SD_F_SIMPLEX))
1798 dsp_set_flags(i_dev, dsp_get_flags(i_dev)^SD_F_SIMPLEX);
1799 PCM_UNLOCK(d);
1800 break;
1801
1802 /*
1803 * The following four ioctls are simple wrappers around mixer_ioctl
1804 * with no further processing. xcmd is short for "translated
1805 * command".
1806 */
1807 case SNDCTL_DSP_GETRECVOL:
1808 if (xcmd == 0) {
1809 xcmd = SOUND_MIXER_READ_RECLEV;
1810 chn = rdch;
1811 }
1812 /* FALLTHROUGH */
1813 case SNDCTL_DSP_SETRECVOL:
1814 if (xcmd == 0) {
1815 xcmd = SOUND_MIXER_WRITE_RECLEV;
1816 chn = rdch;
1817 }
1818 /* FALLTHROUGH */
1819 case SNDCTL_DSP_GETPLAYVOL:
1820 if (xcmd == 0) {
1821 xcmd = SOUND_MIXER_READ_PCM;
1822 chn = wrch;
1823 }
1824 /* FALLTHROUGH */
1825 case SNDCTL_DSP_SETPLAYVOL:
1826 if (xcmd == 0) {
1827 xcmd = SOUND_MIXER_WRITE_PCM;
1828 chn = wrch;
1829 }
1830
1831 ret = dsp_ioctl_channel(i_dev, chn, xcmd, arg);
1832 if (ret != -1) {
1833 PCM_GIANT_EXIT(d);
1834 return (ret);
1835 }
1836
1837 if (d->mixer_dev != NULL) {
1838 PCM_ACQUIRE_QUICK(d);
1839 ret = mixer_ioctl_cmd(d->mixer_dev, xcmd, arg, -1, td,
1840 MIXER_CMD_DIRECT);
1841 PCM_RELEASE_QUICK(d);
1842 } else
1843 ret = ENOTSUP;
1844
1845 break;
1846
1847 case SNDCTL_DSP_GET_RECSRC_NAMES:
1848 case SNDCTL_DSP_GET_RECSRC:
1849 case SNDCTL_DSP_SET_RECSRC:
1850 if (d->mixer_dev != NULL) {
1851 PCM_ACQUIRE_QUICK(d);
1852 ret = mixer_ioctl_cmd(d->mixer_dev, cmd, arg, -1, td,
1853 MIXER_CMD_DIRECT);
1854 PCM_RELEASE_QUICK(d);
1855 } else
1856 ret = ENOTSUP;
1857 break;
1858
1859 /*
1860 * The following 3 ioctls aren't very useful at the moment. For
1861 * now, only a single channel is associated with a cdev (/dev/dspN
1862 * instance), so there's only a single output routing to use (i.e.,
1863 * the wrch bound to this cdev).
1864 */
1865 case SNDCTL_DSP_GET_PLAYTGT_NAMES:
1866 {
1867 oss_mixer_enuminfo *ei;
1868 ei = (oss_mixer_enuminfo *)arg;
1869 ei->dev = 0;
1870 ei->ctrl = 0;
1871 ei->version = 0; /* static for now */
1872 ei->strindex[0] = 0;
1873
1874 if (wrch != NULL) {
1875 ei->nvalues = 1;
1876 strlcpy(ei->strings, wrch->name,
1877 sizeof(ei->strings));
1878 } else {
1879 ei->nvalues = 0;
1880 ei->strings[0] = '\0';
1881 }
1882 }
1883 break;
1884 case SNDCTL_DSP_GET_PLAYTGT:
1885 case SNDCTL_DSP_SET_PLAYTGT: /* yes, they are the same for now */
1886 /*
1887 * Re: SET_PLAYTGT
1888 * OSSv4: "The value that was accepted by the device will
1889 * be returned back in the variable pointed by the
1890 * argument."
1891 */
1892 if (wrch != NULL)
1893 *arg_i = 0;
1894 else
1895 ret = EINVAL;
1896 break;
1897
1898 case SNDCTL_DSP_SILENCE:
1899 /*
1900 * Flush the software (pre-feed) buffer, but try to minimize playback
1901 * interruption. (I.e., record unplayed samples with intent to
1902 * restore by SNDCTL_DSP_SKIP.) Intended for application "pause"
1903 * functionality.
1904 */
1905 if (wrch == NULL)
1906 ret = EINVAL;
1907 else {
1908 struct snd_dbuf *bs;
1909 CHN_LOCK(wrch);
1910 while (wrch->inprog != 0)
1911 cv_wait(&wrch->cv, wrch->lock);
1912 bs = wrch->bufsoft;
1913 if ((bs->shadbuf != NULL) && (sndbuf_getready(bs) > 0)) {
1914 bs->sl = sndbuf_getready(bs);
1915 sndbuf_dispose(bs, bs->shadbuf, sndbuf_getready(bs));
1916 sndbuf_fillsilence(bs);
1917 chn_start(wrch, 0);
1918 }
1919 CHN_UNLOCK(wrch);
1920 }
1921 break;
1922
1923 case SNDCTL_DSP_SKIP:
1924 /*
1925 * OSSv4 docs: "This ioctl call discards all unplayed samples in the
1926 * playback buffer by moving the current write position immediately
1927 * before the point where the device is currently reading the samples."
1928 */
1929 if (wrch == NULL)
1930 ret = EINVAL;
1931 else {
1932 struct snd_dbuf *bs;
1933 CHN_LOCK(wrch);
1934 while (wrch->inprog != 0)
1935 cv_wait(&wrch->cv, wrch->lock);
1936 bs = wrch->bufsoft;
1937 if ((bs->shadbuf != NULL) && (bs->sl > 0)) {
1938 sndbuf_softreset(bs);
1939 sndbuf_acquire(bs, bs->shadbuf, bs->sl);
1940 bs->sl = 0;
1941 chn_start(wrch, 0);
1942 }
1943 CHN_UNLOCK(wrch);
1944 }
1945 break;
1946
1947 case SNDCTL_DSP_CURRENT_OPTR:
1948 case SNDCTL_DSP_CURRENT_IPTR:
1949 /**
1950 * @note Changing formats resets the buffer counters, which differs
1951 * from the 4Front drivers. However, I don't expect this to be
1952 * much of a problem.
1953 *
1954 * @note In a test where @c CURRENT_OPTR is called immediately after write
1955 * returns, this driver is about 32K samples behind whereas
1956 * 4Front's is about 8K samples behind. Should determine source
1957 * of discrepancy, even if only out of curiosity.
1958 *
1959 * @todo Actually test SNDCTL_DSP_CURRENT_IPTR.
1960 */
1961 chn = (cmd == SNDCTL_DSP_CURRENT_OPTR) ? wrch : rdch;
1962 if (chn == NULL)
1963 ret = EINVAL;
1964 else {
1965 struct snd_dbuf *bs;
1966 /* int tmp; */
1967
1968 oss_count_t *oc = (oss_count_t *)arg;
1969
1970 CHN_LOCK(chn);
1971 bs = chn->bufsoft;
1972 #if 0
1973 tmp = (sndbuf_getsize(b) + chn_getptr(chn) - sndbuf_gethwptr(b)) % sndbuf_getsize(b);
1974 oc->samples = (sndbuf_gettotal(b) + tmp) / sndbuf_getalign(b);
1975 oc->fifo_samples = (sndbuf_getready(b) - tmp) / sndbuf_getalign(b);
1976 #else
1977 oc->samples = sndbuf_gettotal(bs) / sndbuf_getalign(bs);
1978 oc->fifo_samples = sndbuf_getready(bs) / sndbuf_getalign(bs);
1979 #endif
1980 CHN_UNLOCK(chn);
1981 }
1982 break;
1983
1984 case SNDCTL_DSP_HALT_OUTPUT:
1985 case SNDCTL_DSP_HALT_INPUT:
1986 chn = (cmd == SNDCTL_DSP_HALT_OUTPUT) ? wrch : rdch;
1987 if (chn == NULL)
1988 ret = EINVAL;
1989 else {
1990 CHN_LOCK(chn);
1991 chn_abort(chn);
1992 CHN_UNLOCK(chn);
1993 }
1994 break;
1995
1996 case SNDCTL_DSP_LOW_WATER:
1997 /*
1998 * Set the number of bytes required to attract attention by
1999 * select/poll.
2000 */
2001 if (wrch != NULL) {
2002 CHN_LOCK(wrch);
2003 wrch->lw = (*arg_i > 1) ? *arg_i : 1;
2004 CHN_UNLOCK(wrch);
2005 }
2006 if (rdch != NULL) {
2007 CHN_LOCK(rdch);
2008 rdch->lw = (*arg_i > 1) ? *arg_i : 1;
2009 CHN_UNLOCK(rdch);
2010 }
2011 break;
2012
2013 case SNDCTL_DSP_GETERROR:
2014 /*
2015 * OSSv4 docs: "All errors and counters will automatically be
2016 * cleared to zeroes after the call so each call will return only
2017 * the errors that occurred after the previous invocation. ... The
2018 * play_underruns and rec_overrun fields are the only usefull fields
2019 * returned by OSS 4.0."
2020 */
2021 {
2022 audio_errinfo *ei = (audio_errinfo *)arg;
2023
2024 bzero((void *)ei, sizeof(*ei));
2025
2026 if (wrch != NULL) {
2027 CHN_LOCK(wrch);
2028 ei->play_underruns = wrch->xruns;
2029 wrch->xruns = 0;
2030 CHN_UNLOCK(wrch);
2031 }
2032 if (rdch != NULL) {
2033 CHN_LOCK(rdch);
2034 ei->rec_overruns = rdch->xruns;
2035 rdch->xruns = 0;
2036 CHN_UNLOCK(rdch);
2037 }
2038 }
2039 break;
2040
2041 case SNDCTL_DSP_SYNCGROUP:
2042 PCM_ACQUIRE_QUICK(d);
2043 ret = dsp_oss_syncgroup(wrch, rdch, (oss_syncgroup *)arg);
2044 PCM_RELEASE_QUICK(d);
2045 break;
2046
2047 case SNDCTL_DSP_SYNCSTART:
2048 PCM_ACQUIRE_QUICK(d);
2049 ret = dsp_oss_syncstart(*arg_i);
2050 PCM_RELEASE_QUICK(d);
2051 break;
2052
2053 case SNDCTL_DSP_POLICY:
2054 PCM_ACQUIRE_QUICK(d);
2055 ret = dsp_oss_policy(wrch, rdch, *arg_i);
2056 PCM_RELEASE_QUICK(d);
2057 break;
2058
2059 case SNDCTL_DSP_COOKEDMODE:
2060 PCM_ACQUIRE_QUICK(d);
2061 if (!(dsp_get_flags(i_dev) & SD_F_BITPERFECT))
2062 ret = dsp_oss_cookedmode(wrch, rdch, *arg_i);
2063 PCM_RELEASE_QUICK(d);
2064 break;
2065 case SNDCTL_DSP_GET_CHNORDER:
2066 PCM_ACQUIRE_QUICK(d);
2067 ret = dsp_oss_getchnorder(wrch, rdch, (unsigned long long *)arg);
2068 PCM_RELEASE_QUICK(d);
2069 break;
2070 case SNDCTL_DSP_SET_CHNORDER:
2071 PCM_ACQUIRE_QUICK(d);
2072 ret = dsp_oss_setchnorder(wrch, rdch, (unsigned long long *)arg);
2073 PCM_RELEASE_QUICK(d);
2074 break;
2075 case SNDCTL_DSP_GETCHANNELMASK: /* XXX vlc */
2076 PCM_ACQUIRE_QUICK(d);
2077 ret = dsp_oss_getchannelmask(wrch, rdch, (int *)arg);
2078 PCM_RELEASE_QUICK(d);
2079 break;
2080 case SNDCTL_DSP_BIND_CHANNEL: /* XXX what?!? */
2081 ret = EINVAL;
2082 break;
2083 #ifdef OSSV4_EXPERIMENT
2084 /*
2085 * XXX The following ioctls are not yet supported and just return
2086 * EINVAL.
2087 */
2088 case SNDCTL_DSP_GETOPEAKS:
2089 case SNDCTL_DSP_GETIPEAKS:
2090 chn = (cmd == SNDCTL_DSP_GETOPEAKS) ? wrch : rdch;
2091 if (chn == NULL)
2092 ret = EINVAL;
2093 else {
2094 oss_peaks_t *op = (oss_peaks_t *)arg;
2095 int lpeak, rpeak;
2096
2097 CHN_LOCK(chn);
2098 ret = chn_getpeaks(chn, &lpeak, &rpeak);
2099 if (ret == -1)
2100 ret = EINVAL;
2101 else {
2102 (*op)[0] = lpeak;
2103 (*op)[1] = rpeak;
2104 }
2105 CHN_UNLOCK(chn);
2106 }
2107 break;
2108
2109 /*
2110 * XXX Once implemented, revisit this for proper cv protection
2111 * (if necessary).
2112 */
2113 case SNDCTL_GETLABEL:
2114 ret = dsp_oss_getlabel(wrch, rdch, (oss_label_t *)arg);
2115 break;
2116 case SNDCTL_SETLABEL:
2117 ret = dsp_oss_setlabel(wrch, rdch, (oss_label_t *)arg);
2118 break;
2119 case SNDCTL_GETSONG:
2120 ret = dsp_oss_getsong(wrch, rdch, (oss_longname_t *)arg);
2121 break;
2122 case SNDCTL_SETSONG:
2123 ret = dsp_oss_setsong(wrch, rdch, (oss_longname_t *)arg);
2124 break;
2125 case SNDCTL_SETNAME:
2126 ret = dsp_oss_setname(wrch, rdch, (oss_longname_t *)arg);
2127 break;
2128 #if 0
2129 /**
2130 * @note The S/PDIF interface ioctls, @c SNDCTL_DSP_READCTL and
2131 * @c SNDCTL_DSP_WRITECTL have been omitted at the suggestion of
2132 * 4Front Technologies.
2133 */
2134 case SNDCTL_DSP_READCTL:
2135 case SNDCTL_DSP_WRITECTL:
2136 ret = EINVAL;
2137 break;
2138 #endif /* !0 (explicitly omitted ioctls) */
2139
2140 #endif /* !OSSV4_EXPERIMENT */
2141 case SNDCTL_DSP_MAPINBUF:
2142 case SNDCTL_DSP_MAPOUTBUF:
2143 case SNDCTL_DSP_SETSYNCRO:
2144 /* undocumented */
2145
2146 case SNDCTL_DSP_SUBDIVIDE:
2147 case SOUND_PCM_WRITE_FILTER:
2148 case SOUND_PCM_READ_FILTER:
2149 /* dunno what these do, don't sound important */
2150
2151 default:
2152 DEB(printf("default ioctl fn 0x%08lx fail\n", cmd));
2153 ret = EINVAL;
2154 break;
2155 }
2156
2157 PCM_GIANT_LEAVE(d);
2158
2159 return (ret);
2160 }
2161
2162 static int
2163 dsp_poll(struct cdev *i_dev, int events, struct thread *td)
2164 {
2165 struct snddev_info *d;
2166 struct pcm_channel *wrch, *rdch;
2167 int ret, e;
2168
2169 d = dsp_get_info(i_dev);
2170 if (PCM_DETACHING(d) || !DSP_REGISTERED(d, i_dev)) {
2171 /* XXX many clients don't understand POLLNVAL */
2172 return (events & (POLLHUP | POLLPRI | POLLIN |
2173 POLLRDNORM | POLLOUT | POLLWRNORM));
2174 }
2175 PCM_GIANT_ENTER(d);
2176
2177 wrch = NULL;
2178 rdch = NULL;
2179 ret = 0;
2180
2181 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
2182
2183 if (wrch != NULL && !(wrch->flags & CHN_F_DEAD)) {
2184 e = (events & (POLLOUT | POLLWRNORM));
2185 if (e)
2186 ret |= chn_poll(wrch, e, td);
2187 }
2188
2189 if (rdch != NULL && !(rdch->flags & CHN_F_DEAD)) {
2190 e = (events & (POLLIN | POLLRDNORM));
2191 if (e)
2192 ret |= chn_poll(rdch, e, td);
2193 }
2194
2195 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
2196
2197 PCM_GIANT_LEAVE(d);
2198
2199 return (ret);
2200 }
2201
2202 static int
2203 dsp_mmap(struct cdev *i_dev, vm_ooffset_t offset, vm_paddr_t *paddr,
2204 int nprot, vm_memattr_t *memattr)
2205 {
2206
2207 /* XXX memattr is not honored */
2208 *paddr = vtophys(offset);
2209 return (0);
2210 }
2211
2212 static int
2213 dsp_mmap_single(struct cdev *i_dev, vm_ooffset_t *offset,
2214 vm_size_t size, struct vm_object **object, int nprot)
2215 {
2216 struct snddev_info *d;
2217 struct pcm_channel *wrch, *rdch, *c;
2218
2219 /*
2220 * Reject PROT_EXEC by default. It just doesn't makes sense.
2221 * Unfortunately, we have to give up this one due to linux_mmap
2222 * changes.
2223 *
2224 * http://lists.freebsd.org/pipermail/freebsd-emulation/2007-June/003698.html
2225 *
2226 */
2227 #ifdef SV_ABI_LINUX
2228 if ((nprot & PROT_EXEC) && (dsp_mmap_allow_prot_exec < 0 ||
2229 (dsp_mmap_allow_prot_exec == 0 &&
2230 SV_CURPROC_ABI() != SV_ABI_LINUX)))
2231 #else
2232 if ((nprot & PROT_EXEC) && dsp_mmap_allow_prot_exec < 1)
2233 #endif
2234 return (EINVAL);
2235
2236 /*
2237 * PROT_READ (alone) selects the input buffer.
2238 * PROT_WRITE (alone) selects the output buffer.
2239 * PROT_WRITE|PROT_READ together select the output buffer.
2240 */
2241 if ((nprot & (PROT_READ | PROT_WRITE)) == 0)
2242 return (EINVAL);
2243
2244 d = dsp_get_info(i_dev);
2245 if (PCM_DETACHING(d) || !DSP_REGISTERED(d, i_dev))
2246 return (EINVAL);
2247
2248 PCM_GIANT_ENTER(d);
2249
2250 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
2251
2252 c = ((nprot & PROT_WRITE) != 0) ? wrch : rdch;
2253 if (c == NULL || (c->flags & CHN_F_MMAP_INVALID) ||
2254 (*offset + size) > sndbuf_getsize(c->bufsoft) ||
2255 (wrch != NULL && (wrch->flags & CHN_F_MMAP_INVALID)) ||
2256 (rdch != NULL && (rdch->flags & CHN_F_MMAP_INVALID))) {
2257 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
2258 PCM_GIANT_EXIT(d);
2259 return (EINVAL);
2260 }
2261
2262 if (wrch != NULL)
2263 wrch->flags |= CHN_F_MMAP;
2264 if (rdch != NULL)
2265 rdch->flags |= CHN_F_MMAP;
2266
2267 *offset = (uintptr_t)sndbuf_getbufofs(c->bufsoft, *offset);
2268 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
2269 *object = vm_pager_allocate(OBJT_DEVICE, i_dev,
2270 size, nprot, *offset, curthread->td_ucred);
2271
2272 PCM_GIANT_LEAVE(d);
2273
2274 if (*object == NULL)
2275 return (EINVAL);
2276 return (0);
2277 }
2278
2279 /* So much for dev_stdclone() */
2280 static int
2281 dsp_stdclone(char *name, char *namep, char *sep, int use_sep, int *u, int *c)
2282 {
2283 size_t len;
2284
2285 len = strlen(namep);
2286
2287 if (bcmp(name, namep, len) != 0)
2288 return (ENODEV);
2289
2290 name += len;
2291
2292 if (isdigit(*name) == 0)
2293 return (ENODEV);
2294
2295 len = strlen(sep);
2296
2297 if (*name == '' && !(name[1] == '\0' || bcmp(name + 1, sep, len) == 0))
2298 return (ENODEV);
2299
2300 for (*u = 0; isdigit(*name) != 0; name++) {
2301 *u *= 10;
2302 *u += *name - '';
2303 if (*u > dsp_umax)
2304 return (ENODEV);
2305 }
2306
2307 if (*name == '\0')
2308 return ((use_sep == 0) ? 0 : ENODEV);
2309
2310 if (bcmp(name, sep, len) != 0 || isdigit(name[len]) == 0)
2311 return (ENODEV);
2312
2313 name += len;
2314
2315 if (*name == '' && name[1] != '\0')
2316 return (ENODEV);
2317
2318 for (*c = 0; isdigit(*name) != 0; name++) {
2319 *c *= 10;
2320 *c += *name - '';
2321 if (*c > dsp_cmax)
2322 return (ENODEV);
2323 }
2324
2325 if (*name != '\0')
2326 return (ENODEV);
2327
2328 return (0);
2329 }
2330
2331 static void
2332 dsp_clone(void *arg,
2333 #if __FreeBSD_version >= 600034
2334 struct ucred *cred,
2335 #endif
2336 char *name, int namelen, struct cdev **dev)
2337 {
2338 struct snddev_info *d;
2339 struct snd_clone_entry *ce;
2340 struct pcm_channel *c;
2341 int i, unit, udcmask, cunit, devtype, devhw, devcmax, tumax;
2342 char *devname, *devcmp, *devsep;
2343
2344 KASSERT(dsp_umax >= 0 && dsp_cmax >= 0, ("Uninitialized unit!"));
2345
2346 if (*dev != NULL)
2347 return;
2348
2349 unit = -1;
2350 cunit = -1;
2351 devtype = -1;
2352 devhw = 0;
2353 devcmax = -1;
2354 tumax = -1;
2355 devname = NULL;
2356 devsep = NULL;
2357
2358 for (i = 0; unit == -1 &&
2359 i < (sizeof(dsp_cdevs) / sizeof(dsp_cdevs[0])); i++) {
2360 devtype = dsp_cdevs[i].type;
2361 devcmp = dsp_cdevs[i].name;
2362 devsep = dsp_cdevs[i].sep;
2363 devname = dsp_cdevs[i].alias;
2364 if (devname == NULL)
2365 devname = devcmp;
2366 devhw = dsp_cdevs[i].hw;
2367 devcmax = dsp_cdevs[i].max - 1;
2368 if (strcmp(name, devcmp) == 0) {
2369 if (dsp_basename_clone != 0)
2370 unit = snd_unit;
2371 } else if (dsp_stdclone(name, devcmp, devsep,
2372 dsp_cdevs[i].use_sep, &unit, &cunit) != 0) {
2373 unit = -1;
2374 cunit = -1;
2375 }
2376 }
2377
2378 d = devclass_get_softc(pcm_devclass, unit);
2379 if (!PCM_REGISTERED(d) || d->clones == NULL)
2380 return;
2381
2382 /* XXX Need Giant magic entry ??? */
2383
2384 PCM_LOCK(d);
2385 if (snd_clone_disabled(d->clones)) {
2386 PCM_UNLOCK(d);
2387 return;
2388 }
2389
2390 PCM_WAIT(d);
2391 PCM_ACQUIRE(d);
2392 PCM_UNLOCK(d);
2393
2394 udcmask = snd_u2unit(unit) | snd_d2unit(devtype);
2395
2396 if (devhw != 0) {
2397 KASSERT(devcmax <= dsp_cmax,
2398 ("overflow: devcmax=%d, dsp_cmax=%d", devcmax, dsp_cmax));
2399 if (cunit > devcmax) {
2400 PCM_RELEASE_QUICK(d);
2401 return;
2402 }
2403 udcmask |= snd_c2unit(cunit);
2404 CHN_FOREACH(c, d, channels.pcm) {
2405 CHN_LOCK(c);
2406 if (c->unit != udcmask) {
2407 CHN_UNLOCK(c);
2408 continue;
2409 }
2410 CHN_UNLOCK(c);
2411 udcmask &= ~snd_c2unit(cunit);
2412 /*
2413 * Temporarily increase clone maxunit to overcome
2414 * vchan flexibility.
2415 *
2416 * # sysctl dev.pcm.0.play.vchans=256
2417 * dev.pcm.0.play.vchans: 1 -> 256
2418 * # cat /dev/zero > /dev/dsp0.vp255 &
2419 * [1] 17296
2420 * # sysctl dev.pcm.0.play.vchans=0
2421 * dev.pcm.0.play.vchans: 256 -> 1
2422 * # fg
2423 * [1] + running cat /dev/zero > /dev/dsp0.vp255
2424 * ^C
2425 * # cat /dev/zero > /dev/dsp0.vp255
2426 * zsh: operation not supported: /dev/dsp0.vp255
2427 */
2428 tumax = snd_clone_getmaxunit(d->clones);
2429 if (cunit > tumax)
2430 snd_clone_setmaxunit(d->clones, cunit);
2431 else
2432 tumax = -1;
2433 goto dsp_clone_alloc;
2434 }
2435 /*
2436 * Ok, so we're requesting unallocated vchan, but still
2437 * within maximum vchan limit.
2438 */
2439 if (((devtype == SND_DEV_DSPHW_VPLAY && d->pvchancount > 0) ||
2440 (devtype == SND_DEV_DSPHW_VREC && d->rvchancount > 0)) &&
2441 cunit < snd_maxautovchans) {
2442 udcmask &= ~snd_c2unit(cunit);
2443 tumax = snd_clone_getmaxunit(d->clones);
2444 if (cunit > tumax)
2445 snd_clone_setmaxunit(d->clones, cunit);
2446 else
2447 tumax = -1;
2448 goto dsp_clone_alloc;
2449 }
2450 PCM_RELEASE_QUICK(d);
2451 return;
2452 }
2453
2454 dsp_clone_alloc:
2455 ce = snd_clone_alloc(d->clones, dev, &cunit, udcmask);
2456 if (tumax != -1)
2457 snd_clone_setmaxunit(d->clones, tumax);
2458 if (ce != NULL) {
2459 udcmask |= snd_c2unit(cunit);
2460 *dev = make_dev(&dsp_cdevsw, PCMMINOR(udcmask),
2461 UID_ROOT, GID_WHEEL, 0666, "%s%d%s%d",
2462 devname, unit, devsep, cunit);
2463 snd_clone_register(ce, *dev);
2464 }
2465
2466 PCM_RELEASE_QUICK(d);
2467
2468 if (*dev != NULL)
2469 dev_ref(*dev);
2470 }
2471
2472 static void
2473 dsp_sysinit(void *p)
2474 {
2475 if (dsp_ehtag != NULL)
2476 return;
2477 /* initialize unit numbering */
2478 snd_unit_init();
2479 dsp_umax = PCMMAXUNIT;
2480 dsp_cmax = PCMMAXCHAN;
2481 dsp_ehtag = EVENTHANDLER_REGISTER(dev_clone, dsp_clone, 0, 1000);
2482 }
2483
2484 static void
2485 dsp_sysuninit(void *p)
2486 {
2487 if (dsp_ehtag == NULL)
2488 return;
2489 EVENTHANDLER_DEREGISTER(dev_clone, dsp_ehtag);
2490 dsp_ehtag = NULL;
2491 }
2492
2493 SYSINIT(dsp_sysinit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysinit, NULL);
2494 SYSUNINIT(dsp_sysuninit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysuninit, NULL);
2495
2496 char *
2497 dsp_unit2name(char *buf, size_t len, int unit)
2498 {
2499 int i, dtype;
2500
2501 KASSERT(buf != NULL && len != 0,
2502 ("bogus buf=%p len=%ju", buf, (uintmax_t)len));
2503
2504 dtype = snd_unit2d(unit);
2505
2506 for (i = 0; i < (sizeof(dsp_cdevs) / sizeof(dsp_cdevs[0])); i++) {
2507 if (dtype != dsp_cdevs[i].type || dsp_cdevs[i].alias != NULL)
2508 continue;
2509 snprintf(buf, len, "%s%d%s%d", dsp_cdevs[i].name,
2510 snd_unit2u(unit), dsp_cdevs[i].sep, snd_unit2c(unit));
2511 return (buf);
2512 }
2513
2514 return (NULL);
2515 }
2516
2517 /**
2518 * @brief Handler for SNDCTL_AUDIOINFO.
2519 *
2520 * Gathers information about the audio device specified in ai->dev. If
2521 * ai->dev == -1, then this function gathers information about the current
2522 * device. If the call comes in on a non-audio device and ai->dev == -1,
2523 * return EINVAL.
2524 *
2525 * This routine is supposed to go practically straight to the hardware,
2526 * getting capabilities directly from the sound card driver, side-stepping
2527 * the intermediate channel interface.
2528 *
2529 * Note, however, that the usefulness of this command is significantly
2530 * decreased when requesting info about any device other than the one serving
2531 * the request. While each snddev_channel refers to a specific device node,
2532 * the converse is *not* true. Currently, when a sound device node is opened,
2533 * the sound subsystem scans for an available audio channel (or channels, if
2534 * opened in read+write) and then assigns them to the si_drv[12] private
2535 * data fields. As a result, any information returned linking a channel to
2536 * a specific character device isn't necessarily accurate.
2537 *
2538 * @note
2539 * Calling threads must not hold any snddev_info or pcm_channel locks.
2540 *
2541 * @param dev device on which the ioctl was issued
2542 * @param ai ioctl request data container
2543 *
2544 * @retval 0 success
2545 * @retval EINVAL ai->dev specifies an invalid device
2546 *
2547 * @todo Verify correctness of Doxygen tags. ;)
2548 */
2549 int
2550 dsp_oss_audioinfo(struct cdev *i_dev, oss_audioinfo *ai)
2551 {
2552 struct pcmchan_caps *caps;
2553 struct pcm_channel *ch;
2554 struct snddev_info *d;
2555 uint32_t fmts;
2556 int i, nchan, *rates, minch, maxch;
2557 char *devname, buf[CHN_NAMELEN];
2558
2559 /*
2560 * If probing the device that received the ioctl, make sure it's a
2561 * DSP device. (Users may use this ioctl with /dev/mixer and
2562 * /dev/midi.)
2563 */
2564 if (ai->dev == -1 && i_dev->si_devsw != &dsp_cdevsw)
2565 return (EINVAL);
2566
2567 ch = NULL;
2568 devname = NULL;
2569 nchan = 0;
2570 bzero(buf, sizeof(buf));
2571
2572 /*
2573 * Search for the requested audio device (channel). Start by
2574 * iterating over pcm devices.
2575 */
2576 for (i = 0; pcm_devclass != NULL &&
2577 i < devclass_get_maxunit(pcm_devclass); i++) {
2578 d = devclass_get_softc(pcm_devclass, i);
2579 if (!PCM_REGISTERED(d))
2580 continue;
2581
2582 /* XXX Need Giant magic entry ??? */
2583
2584 /* See the note in function docblock */
2585 PCM_UNLOCKASSERT(d);
2586 PCM_LOCK(d);
2587
2588 CHN_FOREACH(ch, d, channels.pcm) {
2589 CHN_UNLOCKASSERT(ch);
2590 CHN_LOCK(ch);
2591 if (ai->dev == -1) {
2592 if (DSP_REGISTERED(d, i_dev) &&
2593 (ch == PCM_RDCH(i_dev) || /* record ch */
2594 ch == PCM_WRCH(i_dev))) { /* playback ch */
2595 devname = dsp_unit2name(buf,
2596 sizeof(buf), ch->unit);
2597 }
2598 } else if (ai->dev == nchan) {
2599 devname = dsp_unit2name(buf, sizeof(buf),
2600 ch->unit);
2601 }
2602 if (devname != NULL)
2603 break;
2604 CHN_UNLOCK(ch);
2605 ++nchan;
2606 }
2607
2608 if (devname != NULL) {
2609 /*
2610 * At this point, the following synchronization stuff
2611 * has happened:
2612 * - a specific PCM device is locked.
2613 * - a specific audio channel has been locked, so be
2614 * sure to unlock when exiting;
2615 */
2616
2617 caps = chn_getcaps(ch);
2618
2619 /*
2620 * With all handles collected, zero out the user's
2621 * container and begin filling in its fields.
2622 */
2623 bzero((void *)ai, sizeof(oss_audioinfo));
2624
2625 ai->dev = nchan;
2626 strlcpy(ai->name, ch->name, sizeof(ai->name));
2627
2628 if ((ch->flags & CHN_F_BUSY) == 0)
2629 ai->busy = 0;
2630 else
2631 ai->busy = (ch->direction == PCMDIR_PLAY) ? OPEN_WRITE : OPEN_READ;
2632
2633 /**
2634 * @note
2635 * @c cmd - OSSv4 docs: "Only supported under Linux at
2636 * this moment." Cop-out, I know, but I'll save
2637 * running around in the process table for later.
2638 * Is there a risk of leaking information?
2639 */
2640 ai->pid = ch->pid;
2641
2642 /*
2643 * These flags stolen from SNDCTL_DSP_GETCAPS handler.
2644 * Note, however, that a single channel operates in
2645 * only one direction, so PCM_CAP_DUPLEX is out.
2646 */
2647 /**
2648 * @todo @c SNDCTL_AUDIOINFO::caps - Make drivers keep
2649 * these in pcmchan::caps?
2650 */
2651 ai->caps = PCM_CAP_REALTIME | PCM_CAP_MMAP | PCM_CAP_TRIGGER |
2652 ((ch->direction == PCMDIR_PLAY) ? PCM_CAP_OUTPUT : PCM_CAP_INPUT);
2653
2654 /*
2655 * Collect formats supported @b natively by the
2656 * device. Also determine min/max channels. (I.e.,
2657 * mono, stereo, or both?)
2658 *
2659 * If any channel is stereo, maxch = 2;
2660 * if all channels are stereo, minch = 2, too;
2661 * if any channel is mono, minch = 1;
2662 * and if all channels are mono, maxch = 1.
2663 */
2664 minch = 0;
2665 maxch = 0;
2666 fmts = 0;
2667 for (i = 0; caps->fmtlist[i]; i++) {
2668 fmts |= caps->fmtlist[i];
2669 if (AFMT_CHANNEL(caps->fmtlist[i]) > 1) {
2670 minch = (minch == 0) ? 2 : minch;
2671 maxch = 2;
2672 } else {
2673 minch = 1;
2674 maxch = (maxch == 0) ? 1 : maxch;
2675 }
2676 }
2677
2678 if (ch->direction == PCMDIR_PLAY)
2679 ai->oformats = fmts;
2680 else
2681 ai->iformats = fmts;
2682
2683 /**
2684 * @note
2685 * @c magic - OSSv4 docs: "Reserved for internal use
2686 * by OSS."
2687 *
2688 * @par
2689 * @c card_number - OSSv4 docs: "Number of the sound
2690 * card where this device belongs or -1 if this
2691 * information is not available. Applications
2692 * should normally not use this field for any
2693 * purpose."
2694 */
2695 ai->card_number = -1;
2696 /**
2697 * @todo @c song_name - depends first on
2698 * SNDCTL_[GS]ETSONG @todo @c label - depends
2699 * on SNDCTL_[GS]ETLABEL
2700 * @todo @c port_number - routing information?
2701 */
2702 ai->port_number = -1;
2703 ai->mixer_dev = (d->mixer_dev != NULL) ? PCMUNIT(d->mixer_dev) : -1;
2704 /**
2705 * @note
2706 * @c real_device - OSSv4 docs: "Obsolete."
2707 */
2708 ai->real_device = -1;
2709 strlcpy(ai->devnode, "/dev/", sizeof(ai->devnode));
2710 strlcat(ai->devnode, devname, sizeof(ai->devnode));
2711 ai->enabled = device_is_attached(d->dev) ? 1 : 0;
2712 /**
2713 * @note
2714 * @c flags - OSSv4 docs: "Reserved for future use."
2715 *
2716 * @note
2717 * @c binding - OSSv4 docs: "Reserved for future use."
2718 *
2719 * @todo @c handle - haven't decided how to generate
2720 * this yet; bus, vendor, device IDs?
2721 */
2722 ai->min_rate = caps->minspeed;
2723 ai->max_rate = caps->maxspeed;
2724
2725 ai->min_channels = minch;
2726 ai->max_channels = maxch;
2727
2728 ai->nrates = chn_getrates(ch, &rates);
2729 if (ai->nrates > OSS_MAX_SAMPLE_RATES)
2730 ai->nrates = OSS_MAX_SAMPLE_RATES;
2731
2732 for (i = 0; i < ai->nrates; i++)
2733 ai->rates[i] = rates[i];
2734
2735 ai->next_play_engine = 0;
2736 ai->next_rec_engine = 0;
2737
2738 CHN_UNLOCK(ch);
2739 }
2740
2741 PCM_UNLOCK(d);
2742
2743 if (devname != NULL)
2744 return (0);
2745 }
2746
2747 /* Exhausted the search -- nothing is locked, so return. */
2748 return (EINVAL);
2749 }
2750
2751 /**
2752 * @brief Assigns a PCM channel to a sync group.
2753 *
2754 * Sync groups are used to enable audio operations on multiple devices
2755 * simultaneously. They may be used with any number of devices and may
2756 * span across applications. Devices are added to groups with
2757 * the SNDCTL_DSP_SYNCGROUP ioctl, and operations are triggered with the
2758 * SNDCTL_DSP_SYNCSTART ioctl.
2759 *
2760 * If the @c id field of the @c group parameter is set to zero, then a new
2761 * sync group is created. Otherwise, wrch and rdch (if set) are added to
2762 * the group specified.
2763 *
2764 * @todo As far as memory allocation, should we assume that things are
2765 * okay and allocate with M_WAITOK before acquiring channel locks,
2766 * freeing later if not?
2767 *
2768 * @param wrch output channel associated w/ device (if any)
2769 * @param rdch input channel associated w/ device (if any)
2770 * @param group Sync group parameters
2771 *
2772 * @retval 0 success
2773 * @retval non-zero error to be propagated upstream
2774 */
2775 static int
2776 dsp_oss_syncgroup(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_syncgroup *group)
2777 {
2778 struct pcmchan_syncmember *smrd, *smwr;
2779 struct pcmchan_syncgroup *sg;
2780 int ret, sg_ids[3];
2781
2782 smrd = NULL;
2783 smwr = NULL;
2784 sg = NULL;
2785 ret = 0;
2786
2787 /*
2788 * Free_unr() may sleep, so store released syncgroup IDs until after
2789 * all locks are released.
2790 */
2791 sg_ids[0] = sg_ids[1] = sg_ids[2] = 0;
2792
2793 PCM_SG_LOCK();
2794
2795 /*
2796 * - Insert channel(s) into group's member list.
2797 * - Set CHN_F_NOTRIGGER on channel(s).
2798 * - Stop channel(s).
2799 */
2800
2801 /*
2802 * If device's channels are already mapped to a group, unmap them.
2803 */
2804 if (wrch) {
2805 CHN_LOCK(wrch);
2806 sg_ids[0] = chn_syncdestroy(wrch);
2807 }
2808
2809 if (rdch) {
2810 CHN_LOCK(rdch);
2811 sg_ids[1] = chn_syncdestroy(rdch);
2812 }
2813
2814 /*
2815 * Verify that mode matches character device properites.
2816 * - Bail if PCM_ENABLE_OUTPUT && wrch == NULL.
2817 * - Bail if PCM_ENABLE_INPUT && rdch == NULL.
2818 */
2819 if (((wrch == NULL) && (group->mode & PCM_ENABLE_OUTPUT)) ||
2820 ((rdch == NULL) && (group->mode & PCM_ENABLE_INPUT))) {
2821 ret = EINVAL;
2822 goto out;
2823 }
2824
2825 /*
2826 * An id of zero indicates the user wants to create a new
2827 * syncgroup.
2828 */
2829 if (group->id == 0) {
2830 sg = (struct pcmchan_syncgroup *)malloc(sizeof(*sg), M_DEVBUF, M_NOWAIT);
2831 if (sg != NULL) {
2832 SLIST_INIT(&sg->members);
2833 sg->id = alloc_unr(pcmsg_unrhdr);
2834
2835 group->id = sg->id;
2836 SLIST_INSERT_HEAD(&snd_pcm_syncgroups, sg, link);
2837 } else
2838 ret = ENOMEM;
2839 } else {
2840 SLIST_FOREACH(sg, &snd_pcm_syncgroups, link) {
2841 if (sg->id == group->id)
2842 break;
2843 }
2844 if (sg == NULL)
2845 ret = EINVAL;
2846 }
2847
2848 /* Couldn't create or find a syncgroup. Fail. */
2849 if (sg == NULL)
2850 goto out;
2851
2852 /*
2853 * Allocate a syncmember, assign it and a channel together, and
2854 * insert into syncgroup.
2855 */
2856 if (group->mode & PCM_ENABLE_INPUT) {
2857 smrd = (struct pcmchan_syncmember *)malloc(sizeof(*smrd), M_DEVBUF, M_NOWAIT);
2858 if (smrd == NULL) {
2859 ret = ENOMEM;
2860 goto out;
2861 }
2862
2863 SLIST_INSERT_HEAD(&sg->members, smrd, link);
2864 smrd->parent = sg;
2865 smrd->ch = rdch;
2866
2867 chn_abort(rdch);
2868 rdch->flags |= CHN_F_NOTRIGGER;
2869 rdch->sm = smrd;
2870 }
2871
2872 if (group->mode & PCM_ENABLE_OUTPUT) {
2873 smwr = (struct pcmchan_syncmember *)malloc(sizeof(*smwr), M_DEVBUF, M_NOWAIT);
2874 if (smwr == NULL) {
2875 ret = ENOMEM;
2876 goto out;
2877 }
2878
2879 SLIST_INSERT_HEAD(&sg->members, smwr, link);
2880 smwr->parent = sg;
2881 smwr->ch = wrch;
2882
2883 chn_abort(wrch);
2884 wrch->flags |= CHN_F_NOTRIGGER;
2885 wrch->sm = smwr;
2886 }
2887
2888
2889 out:
2890 if (ret != 0) {
2891 if (smrd != NULL)
2892 free(smrd, M_DEVBUF);
2893 if ((sg != NULL) && SLIST_EMPTY(&sg->members)) {
2894 sg_ids[2] = sg->id;
2895 SLIST_REMOVE(&snd_pcm_syncgroups, sg, pcmchan_syncgroup, link);
2896 free(sg, M_DEVBUF);
2897 }
2898
2899 if (wrch)
2900 wrch->sm = NULL;
2901 if (rdch)
2902 rdch->sm = NULL;
2903 }
2904
2905 if (wrch)
2906 CHN_UNLOCK(wrch);
2907 if (rdch)
2908 CHN_UNLOCK(rdch);
2909
2910 PCM_SG_UNLOCK();
2911
2912 if (sg_ids[0])
2913 free_unr(pcmsg_unrhdr, sg_ids[0]);
2914 if (sg_ids[1])
2915 free_unr(pcmsg_unrhdr, sg_ids[1]);
2916 if (sg_ids[2])
2917 free_unr(pcmsg_unrhdr, sg_ids[2]);
2918
2919 return (ret);
2920 }
2921
2922 /**
2923 * @brief Launch a sync group into action
2924 *
2925 * Sync groups are established via SNDCTL_DSP_SYNCGROUP. This function
2926 * iterates over all members, triggering them along the way.
2927 *
2928 * @note Caller must not hold any channel locks.
2929 *
2930 * @param sg_id sync group identifier
2931 *
2932 * @retval 0 success
2933 * @retval non-zero error worthy of propagating upstream to user
2934 */
2935 static int
2936 dsp_oss_syncstart(int sg_id)
2937 {
2938 struct pcmchan_syncmember *sm, *sm_tmp;
2939 struct pcmchan_syncgroup *sg;
2940 struct pcm_channel *c;
2941 int ret, needlocks;
2942
2943 /* Get the synclists lock */
2944 PCM_SG_LOCK();
2945
2946 do {
2947 ret = 0;
2948 needlocks = 0;
2949
2950 /* Search for syncgroup by ID */
2951 SLIST_FOREACH(sg, &snd_pcm_syncgroups, link) {
2952 if (sg->id == sg_id)
2953 break;
2954 }
2955
2956 /* Return EINVAL if not found */
2957 if (sg == NULL) {
2958 ret = EINVAL;
2959 break;
2960 }
2961
2962 /* Any removals resulting in an empty group should've handled this */
2963 KASSERT(!SLIST_EMPTY(&sg->members), ("found empty syncgroup"));
2964
2965 /*
2966 * Attempt to lock all member channels - if any are already
2967 * locked, unlock those acquired, sleep for a bit, and try
2968 * again.
2969 */
2970 SLIST_FOREACH(sm, &sg->members, link) {
2971 if (CHN_TRYLOCK(sm->ch) == 0) {
2972 int timo = hz * 5/1000;
2973 if (timo < 1)
2974 timo = 1;
2975
2976 /* Release all locked channels so far, retry */
2977 SLIST_FOREACH(sm_tmp, &sg->members, link) {
2978 /* sm is the member already locked */
2979 if (sm == sm_tmp)
2980 break;
2981 CHN_UNLOCK(sm_tmp->ch);
2982 }
2983
2984 /** @todo Is PRIBIO correct/ */
2985 ret = msleep(sm, &snd_pcm_syncgroups_mtx,
2986 PRIBIO | PCATCH, "pcmsg", timo);
2987 if (ret == EINTR || ret == ERESTART)
2988 break;
2989
2990 needlocks = 1;
2991 ret = 0; /* Assumes ret == EAGAIN... */
2992 }
2993 }
2994 } while (needlocks && ret == 0);
2995
2996 /* Proceed only if no errors encountered. */
2997 if (ret == 0) {
2998 /* Launch channels */
2999 while ((sm = SLIST_FIRST(&sg->members)) != NULL) {
3000 SLIST_REMOVE_HEAD(&sg->members, link);
3001
3002 c = sm->ch;
3003 c->sm = NULL;
3004 chn_start(c, 1);
3005 c->flags &= ~CHN_F_NOTRIGGER;
3006 CHN_UNLOCK(c);
3007
3008 free(sm, M_DEVBUF);
3009 }
3010
3011 SLIST_REMOVE(&snd_pcm_syncgroups, sg, pcmchan_syncgroup, link);
3012 free(sg, M_DEVBUF);
3013 }
3014
3015 PCM_SG_UNLOCK();
3016
3017 /*
3018 * Free_unr() may sleep, so be sure to give up the syncgroup lock
3019 * first.
3020 */
3021 if (ret == 0)
3022 free_unr(pcmsg_unrhdr, sg_id);
3023
3024 return (ret);
3025 }
3026
3027 /**
3028 * @brief Handler for SNDCTL_DSP_POLICY
3029 *
3030 * The SNDCTL_DSP_POLICY ioctl is a simpler interface to control fragment
3031 * size and count like with SNDCTL_DSP_SETFRAGMENT. Instead of the user
3032 * specifying those two parameters, s/he simply selects a number from 0..10
3033 * which corresponds to a buffer size. Smaller numbers request smaller
3034 * buffers with lower latencies (at greater overhead from more frequent
3035 * interrupts), while greater numbers behave in the opposite manner.
3036 *
3037 * The 4Front spec states that a value of 5 should be the default. However,
3038 * this implementation deviates slightly by using a linear scale without
3039 * consulting drivers. I.e., even though drivers may have different default
3040 * buffer sizes, a policy argument of 5 will have the same result across
3041 * all drivers.
3042 *
3043 * See http://manuals.opensound.com/developer/SNDCTL_DSP_POLICY.html for
3044 * more information.
3045 *
3046 * @todo When SNDCTL_DSP_COOKEDMODE is supported, it'll be necessary to
3047 * work with hardware drivers directly.
3048 *
3049 * @note PCM channel arguments must not be locked by caller.
3050 *
3051 * @param wrch Pointer to opened playback channel (optional; may be NULL)
3052 * @param rdch " recording channel (optional; may be NULL)
3053 * @param policy Integer from [0:10]
3054 *
3055 * @retval 0 constant (for now)
3056 */
3057 static int
3058 dsp_oss_policy(struct pcm_channel *wrch, struct pcm_channel *rdch, int policy)
3059 {
3060 int ret;
3061
3062 if (policy < CHN_POLICY_MIN || policy > CHN_POLICY_MAX)
3063 return (EIO);
3064
3065 /* Default: success */
3066 ret = 0;
3067
3068 if (rdch) {
3069 CHN_LOCK(rdch);
3070 ret = chn_setlatency(rdch, policy);
3071 CHN_UNLOCK(rdch);
3072 }
3073
3074 if (wrch && ret == 0) {
3075 CHN_LOCK(wrch);
3076 ret = chn_setlatency(wrch, policy);
3077 CHN_UNLOCK(wrch);
3078 }
3079
3080 if (ret)
3081 ret = EIO;
3082
3083 return (ret);
3084 }
3085
3086 /**
3087 * @brief Enable or disable "cooked" mode
3088 *
3089 * This is a handler for @c SNDCTL_DSP_COOKEDMODE. When in cooked mode, which
3090 * is the default, the sound system handles rate and format conversions
3091 * automatically (ex: user writing 11025Hz/8 bit/unsigned but card only
3092 * operates with 44100Hz/16bit/signed samples).
3093 *
3094 * Disabling cooked mode is intended for applications wanting to mmap()
3095 * a sound card's buffer space directly, bypassing the FreeBSD 2-stage
3096 * feeder architecture, presumably to gain as much control over audio
3097 * hardware as possible.
3098 *
3099 * See @c http://manuals.opensound.com/developer/SNDCTL_DSP_COOKEDMODE.html
3100 * for more details.
3101 *
3102 * @param wrch playback channel (optional; may be NULL)
3103 * @param rdch recording channel (optional; may be NULL)
3104 * @param enabled 0 = raw mode, 1 = cooked mode
3105 *
3106 * @retval EINVAL Operation not yet supported.
3107 */
3108 static int
3109 dsp_oss_cookedmode(struct pcm_channel *wrch, struct pcm_channel *rdch, int enabled)
3110 {
3111
3112 /*
3113 * XXX I just don't get it. Why don't they call it
3114 * "BITPERFECT" ~ SNDCTL_DSP_BITPERFECT !?!?.
3115 * This is just plain so confusing, incoherent,
3116 * <insert any non-printable characters here>.
3117 */
3118 if (!(enabled == 1 || enabled == 0))
3119 return (EINVAL);
3120
3121 /*
3122 * I won't give in. I'm inverting its logic here and now.
3123 * Brag all you want, but "BITPERFECT" should be the better
3124 * term here.
3125 */
3126 enabled ^= 0x00000001;
3127
3128 if (wrch != NULL) {
3129 CHN_LOCK(wrch);
3130 wrch->flags &= ~CHN_F_BITPERFECT;
3131 wrch->flags |= (enabled != 0) ? CHN_F_BITPERFECT : 0x00000000;
3132 CHN_UNLOCK(wrch);
3133 }
3134
3135 if (rdch != NULL) {
3136 CHN_LOCK(rdch);
3137 rdch->flags &= ~CHN_F_BITPERFECT;
3138 rdch->flags |= (enabled != 0) ? CHN_F_BITPERFECT : 0x00000000;
3139 CHN_UNLOCK(rdch);
3140 }
3141
3142 return (0);
3143 }
3144
3145 /**
3146 * @brief Retrieve channel interleaving order
3147 *
3148 * This is the handler for @c SNDCTL_DSP_GET_CHNORDER.
3149 *
3150 * See @c http://manuals.opensound.com/developer/SNDCTL_DSP_GET_CHNORDER.html
3151 * for more details.
3152 *
3153 * @note As the ioctl definition is still under construction, FreeBSD
3154 * does not currently support SNDCTL_DSP_GET_CHNORDER.
3155 *
3156 * @param wrch playback channel (optional; may be NULL)
3157 * @param rdch recording channel (optional; may be NULL)
3158 * @param map channel map (result will be stored there)
3159 *
3160 * @retval EINVAL Operation not yet supported.
3161 */
3162 static int
3163 dsp_oss_getchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map)
3164 {
3165 struct pcm_channel *ch;
3166 int ret;
3167
3168 ch = (wrch != NULL) ? wrch : rdch;
3169 if (ch != NULL) {
3170 CHN_LOCK(ch);
3171 ret = chn_oss_getorder(ch, map);
3172 CHN_UNLOCK(ch);
3173 } else
3174 ret = EINVAL;
3175
3176 return (ret);
3177 }
3178
3179 /**
3180 * @brief Specify channel interleaving order
3181 *
3182 * This is the handler for @c SNDCTL_DSP_SET_CHNORDER.
3183 *
3184 * @note As the ioctl definition is still under construction, FreeBSD
3185 * does not currently support @c SNDCTL_DSP_SET_CHNORDER.
3186 *
3187 * @param wrch playback channel (optional; may be NULL)
3188 * @param rdch recording channel (optional; may be NULL)
3189 * @param map channel map
3190 *
3191 * @retval EINVAL Operation not yet supported.
3192 */
3193 static int
3194 dsp_oss_setchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map)
3195 {
3196 int ret;
3197
3198 ret = 0;
3199
3200 if (wrch != NULL) {
3201 CHN_LOCK(wrch);
3202 ret = chn_oss_setorder(wrch, map);
3203 CHN_UNLOCK(wrch);
3204 }
3205
3206 if (ret == 0 && rdch != NULL) {
3207 CHN_LOCK(rdch);
3208 ret = chn_oss_setorder(rdch, map);
3209 CHN_UNLOCK(rdch);
3210 }
3211
3212 return (ret);
3213 }
3214
3215 static int
3216 dsp_oss_getchannelmask(struct pcm_channel *wrch, struct pcm_channel *rdch,
3217 int *mask)
3218 {
3219 struct pcm_channel *ch;
3220 uint32_t chnmask;
3221 int ret;
3222
3223 chnmask = 0;
3224 ch = (wrch != NULL) ? wrch : rdch;
3225
3226 if (ch != NULL) {
3227 CHN_LOCK(ch);
3228 ret = chn_oss_getmask(ch, &chnmask);
3229 CHN_UNLOCK(ch);
3230 } else
3231 ret = EINVAL;
3232
3233 if (ret == 0)
3234 *mask = chnmask;
3235
3236 return (ret);
3237 }
3238
3239 #ifdef OSSV4_EXPERIMENT
3240 /**
3241 * @brief Retrieve an audio device's label
3242 *
3243 * This is a handler for the @c SNDCTL_GETLABEL ioctl.
3244 *
3245 * See @c http://manuals.opensound.com/developer/SNDCTL_GETLABEL.html
3246 * for more details.
3247 *
3248 * From Hannu@4Front: "For example ossxmix (just like some HW mixer
3249 * consoles) can show variable "labels" for certain controls. By default
3250 * the application name (say quake) is shown as the label but
3251 * applications may change the labels themselves."
3252 *
3253 * @note As the ioctl definition is still under construction, FreeBSD
3254 * does not currently support @c SNDCTL_GETLABEL.
3255 *
3256 * @param wrch playback channel (optional; may be NULL)
3257 * @param rdch recording channel (optional; may be NULL)
3258 * @param label label gets copied here
3259 *
3260 * @retval EINVAL Operation not yet supported.
3261 */
3262 static int
3263 dsp_oss_getlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label)
3264 {
3265 return (EINVAL);
3266 }
3267
3268 /**
3269 * @brief Specify an audio device's label
3270 *
3271 * This is a handler for the @c SNDCTL_SETLABEL ioctl. Please see the
3272 * comments for @c dsp_oss_getlabel immediately above.
3273 *
3274 * See @c http://manuals.opensound.com/developer/SNDCTL_GETLABEL.html
3275 * for more details.
3276 *
3277 * @note As the ioctl definition is still under construction, FreeBSD
3278 * does not currently support SNDCTL_SETLABEL.
3279 *
3280 * @param wrch playback channel (optional; may be NULL)
3281 * @param rdch recording channel (optional; may be NULL)
3282 * @param label label gets copied from here
3283 *
3284 * @retval EINVAL Operation not yet supported.
3285 */
3286 static int
3287 dsp_oss_setlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label)
3288 {
3289 return (EINVAL);
3290 }
3291
3292 /**
3293 * @brief Retrieve name of currently played song
3294 *
3295 * This is a handler for the @c SNDCTL_GETSONG ioctl. Audio players could
3296 * tell the system the name of the currently playing song, which would be
3297 * visible in @c /dev/sndstat.
3298 *
3299 * See @c http://manuals.opensound.com/developer/SNDCTL_GETSONG.html
3300 * for more details.
3301 *
3302 * @note As the ioctl definition is still under construction, FreeBSD
3303 * does not currently support SNDCTL_GETSONG.
3304 *
3305 * @param wrch playback channel (optional; may be NULL)
3306 * @param rdch recording channel (optional; may be NULL)
3307 * @param song song name gets copied here
3308 *
3309 * @retval EINVAL Operation not yet supported.
3310 */
3311 static int
3312 dsp_oss_getsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song)
3313 {
3314 return (EINVAL);
3315 }
3316
3317 /**
3318 * @brief Retrieve name of currently played song
3319 *
3320 * This is a handler for the @c SNDCTL_SETSONG ioctl. Audio players could
3321 * tell the system the name of the currently playing song, which would be
3322 * visible in @c /dev/sndstat.
3323 *
3324 * See @c http://manuals.opensound.com/developer/SNDCTL_SETSONG.html
3325 * for more details.
3326 *
3327 * @note As the ioctl definition is still under construction, FreeBSD
3328 * does not currently support SNDCTL_SETSONG.
3329 *
3330 * @param wrch playback channel (optional; may be NULL)
3331 * @param rdch recording channel (optional; may be NULL)
3332 * @param song song name gets copied from here
3333 *
3334 * @retval EINVAL Operation not yet supported.
3335 */
3336 static int
3337 dsp_oss_setsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song)
3338 {
3339 return (EINVAL);
3340 }
3341
3342 /**
3343 * @brief Rename a device
3344 *
3345 * This is a handler for the @c SNDCTL_SETNAME ioctl.
3346 *
3347 * See @c http://manuals.opensound.com/developer/SNDCTL_SETNAME.html for
3348 * more details.
3349 *
3350 * From Hannu@4Front: "This call is used to change the device name
3351 * reported in /dev/sndstat and ossinfo. So instead of using some generic
3352 * 'OSS loopback audio (MIDI) driver' the device may be given a meaningfull
3353 * name depending on the current context (for example 'OSS virtual wave table
3354 * synth' or 'VoIP link to London')."
3355 *
3356 * @note As the ioctl definition is still under construction, FreeBSD
3357 * does not currently support SNDCTL_SETNAME.
3358 *
3359 * @param wrch playback channel (optional; may be NULL)
3360 * @param rdch recording channel (optional; may be NULL)
3361 * @param name new device name gets copied from here
3362 *
3363 * @retval EINVAL Operation not yet supported.
3364 */
3365 static int
3366 dsp_oss_setname(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *name)
3367 {
3368 return (EINVAL);
3369 }
3370 #endif /* !OSSV4_EXPERIMENT */
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