1 /*-
2 * Copyright (c) 2005-2009 Ariff Abdullah <ariff@FreeBSD.org>
3 * Portions Copyright (c) Ryan Beasley <ryan.beasley@gmail.com> - GSoC 2006
4 * Copyright (c) 1999 Cameron Grant <cg@FreeBSD.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #ifdef HAVE_KERNEL_OPTION_HEADERS
30 #include "opt_snd.h"
31 #endif
32
33 #include <dev/sound/pcm/sound.h>
34 #include <sys/ctype.h>
35 #include <sys/lock.h>
36 #include <sys/rwlock.h>
37 #include <sys/sysent.h>
38
39 #include <vm/vm.h>
40 #include <vm/vm_object.h>
41 #include <vm/vm_page.h>
42 #include <vm/vm_pager.h>
43
44 SND_DECLARE_FILE("$FreeBSD$");
45
46 static int dsp_mmap_allow_prot_exec = 0;
47 SYSCTL_INT(_hw_snd, OID_AUTO, compat_linux_mmap, CTLFLAG_RW,
48 &dsp_mmap_allow_prot_exec, 0,
49 "linux mmap compatibility (-1=force disable 0=auto 1=force enable)");
50
51 static int dsp_basename_clone = 1;
52 SYSCTL_INT(_hw_snd, OID_AUTO, basename_clone, CTLFLAG_RWTUN,
53 &dsp_basename_clone, 0,
54 "DSP basename cloning (0: Disable; 1: Enabled)");
55 TUNABLE_INT("hw.snd.basename_clone", &dsp_basename_clone);
56
57 struct dsp_cdevinfo {
58 struct pcm_channel *rdch, *wrch;
59 struct pcm_channel *volch;
60 int busy, simplex;
61 TAILQ_ENTRY(dsp_cdevinfo) link;
62 };
63
64 #define PCM_RDCH(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->rdch)
65 #define PCM_WRCH(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->wrch)
66 #define PCM_VOLCH(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->volch)
67 #define PCM_SIMPLEX(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->simplex)
68
69 #define DSP_CDEVINFO_CACHESIZE 8
70
71 #define DSP_REGISTERED(x, y) (PCM_REGISTERED(x) && \
72 (y) != NULL && (y)->si_drv1 != NULL)
73
74 #define OLDPCM_IOCTL
75
76 static d_open_t dsp_open;
77 static d_close_t dsp_close;
78 static d_read_t dsp_read;
79 static d_write_t dsp_write;
80 static d_ioctl_t dsp_ioctl;
81 static d_poll_t dsp_poll;
82 static d_mmap_t dsp_mmap;
83 static d_mmap_single_t dsp_mmap_single;
84
85 struct cdevsw dsp_cdevsw = {
86 .d_version = D_VERSION,
87 .d_open = dsp_open,
88 .d_close = dsp_close,
89 .d_read = dsp_read,
90 .d_write = dsp_write,
91 .d_ioctl = dsp_ioctl,
92 .d_poll = dsp_poll,
93 .d_mmap = dsp_mmap,
94 .d_mmap_single = dsp_mmap_single,
95 .d_name = "dsp",
96 };
97
98 static eventhandler_tag dsp_ehtag = NULL;
99 static int dsp_umax = -1;
100 static int dsp_cmax = -1;
101
102 static int dsp_oss_syncgroup(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_syncgroup *group);
103 static int dsp_oss_syncstart(int sg_id);
104 static int dsp_oss_policy(struct pcm_channel *wrch, struct pcm_channel *rdch, int policy);
105 static int dsp_oss_cookedmode(struct pcm_channel *wrch, struct pcm_channel *rdch, int enabled);
106 static int dsp_oss_getchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map);
107 static int dsp_oss_setchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map);
108 static int dsp_oss_getchannelmask(struct pcm_channel *wrch, struct pcm_channel *rdch, int *mask);
109 #ifdef OSSV4_EXPERIMENT
110 static int dsp_oss_getlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label);
111 static int dsp_oss_setlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label);
112 static int dsp_oss_getsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song);
113 static int dsp_oss_setsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song);
114 static int dsp_oss_setname(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *name);
115 #endif
116
117 static struct snddev_info *
dsp_get_info(struct cdev * dev)118 dsp_get_info(struct cdev *dev)
119 {
120 return (devclass_get_softc(pcm_devclass, PCMUNIT(dev)));
121 }
122
123 static uint32_t
dsp_get_flags(struct cdev * dev)124 dsp_get_flags(struct cdev *dev)
125 {
126 device_t bdev;
127
128 bdev = devclass_get_device(pcm_devclass, PCMUNIT(dev));
129
130 return ((bdev != NULL) ? pcm_getflags(bdev) : 0xffffffff);
131 }
132
133 static void
dsp_set_flags(struct cdev * dev,uint32_t flags)134 dsp_set_flags(struct cdev *dev, uint32_t flags)
135 {
136 device_t bdev;
137
138 bdev = devclass_get_device(pcm_devclass, PCMUNIT(dev));
139
140 if (bdev != NULL)
141 pcm_setflags(bdev, flags);
142 }
143
144 /*
145 * return the channels associated with an open device instance.
146 * lock channels specified.
147 */
148 static int
getchns(struct cdev * dev,struct pcm_channel ** rdch,struct pcm_channel ** wrch,uint32_t prio)149 getchns(struct cdev *dev, struct pcm_channel **rdch, struct pcm_channel **wrch,
150 uint32_t prio)
151 {
152 struct snddev_info *d;
153 struct pcm_channel *ch;
154 uint32_t flags;
155
156 if (PCM_SIMPLEX(dev) != 0) {
157 d = dsp_get_info(dev);
158 if (!PCM_REGISTERED(d))
159 return (ENXIO);
160 PCM_LOCK(d);
161 PCM_WAIT(d);
162 PCM_ACQUIRE(d);
163 /*
164 * Note: order is important -
165 * pcm flags -> prio query flags -> wild guess
166 */
167 ch = NULL;
168 flags = dsp_get_flags(dev);
169 if (flags & SD_F_PRIO_WR) {
170 ch = PCM_RDCH(dev);
171 PCM_RDCH(dev) = NULL;
172 } else if (flags & SD_F_PRIO_RD) {
173 ch = PCM_WRCH(dev);
174 PCM_WRCH(dev) = NULL;
175 } else if (prio & SD_F_PRIO_WR) {
176 ch = PCM_RDCH(dev);
177 PCM_RDCH(dev) = NULL;
178 flags |= SD_F_PRIO_WR;
179 } else if (prio & SD_F_PRIO_RD) {
180 ch = PCM_WRCH(dev);
181 PCM_WRCH(dev) = NULL;
182 flags |= SD_F_PRIO_RD;
183 } else if (PCM_WRCH(dev) != NULL) {
184 ch = PCM_RDCH(dev);
185 PCM_RDCH(dev) = NULL;
186 flags |= SD_F_PRIO_WR;
187 } else if (PCM_RDCH(dev) != NULL) {
188 ch = PCM_WRCH(dev);
189 PCM_WRCH(dev) = NULL;
190 flags |= SD_F_PRIO_RD;
191 }
192 PCM_SIMPLEX(dev) = 0;
193 dsp_set_flags(dev, flags);
194 if (ch != NULL) {
195 CHN_LOCK(ch);
196 pcm_chnref(ch, -1);
197 pcm_chnrelease(ch);
198 }
199 PCM_RELEASE(d);
200 PCM_UNLOCK(d);
201 }
202
203 *rdch = PCM_RDCH(dev);
204 *wrch = PCM_WRCH(dev);
205
206 if (*rdch != NULL && (prio & SD_F_PRIO_RD))
207 CHN_LOCK(*rdch);
208 if (*wrch != NULL && (prio & SD_F_PRIO_WR))
209 CHN_LOCK(*wrch);
210
211 return (0);
212 }
213
214 /* unlock specified channels */
215 static void
relchns(struct cdev * dev,struct pcm_channel * rdch,struct pcm_channel * wrch,uint32_t prio)216 relchns(struct cdev *dev, struct pcm_channel *rdch, struct pcm_channel *wrch,
217 uint32_t prio)
218 {
219 if (wrch != NULL && (prio & SD_F_PRIO_WR))
220 CHN_UNLOCK(wrch);
221 if (rdch != NULL && (prio & SD_F_PRIO_RD))
222 CHN_UNLOCK(rdch);
223 }
224
225 static void
dsp_cdevinfo_alloc(struct cdev * dev,struct pcm_channel * rdch,struct pcm_channel * wrch,struct pcm_channel * volch)226 dsp_cdevinfo_alloc(struct cdev *dev,
227 struct pcm_channel *rdch, struct pcm_channel *wrch,
228 struct pcm_channel *volch)
229 {
230 struct snddev_info *d;
231 struct dsp_cdevinfo *cdi;
232 int simplex;
233
234 d = dsp_get_info(dev);
235
236 KASSERT(PCM_REGISTERED(d) && dev != NULL && dev->si_drv1 == NULL &&
237 ((rdch == NULL && wrch == NULL) || rdch != wrch),
238 ("bogus %s(), what are you trying to accomplish here?", __func__));
239 PCM_BUSYASSERT(d);
240 PCM_LOCKASSERT(d);
241
242 simplex = (dsp_get_flags(dev) & SD_F_SIMPLEX) ? 1 : 0;
243
244 /*
245 * Scan for free instance entry and put it into the end of list.
246 * Create new one if necessary.
247 */
248 TAILQ_FOREACH(cdi, &d->dsp_cdevinfo_pool, link) {
249 if (cdi->busy != 0)
250 break;
251 cdi->rdch = rdch;
252 cdi->wrch = wrch;
253 cdi->volch = volch;
254 cdi->simplex = simplex;
255 cdi->busy = 1;
256 TAILQ_REMOVE(&d->dsp_cdevinfo_pool, cdi, link);
257 TAILQ_INSERT_TAIL(&d->dsp_cdevinfo_pool, cdi, link);
258 dev->si_drv1 = cdi;
259 return;
260 }
261 PCM_UNLOCK(d);
262 cdi = malloc(sizeof(*cdi), M_DEVBUF, M_WAITOK | M_ZERO);
263 PCM_LOCK(d);
264 cdi->rdch = rdch;
265 cdi->wrch = wrch;
266 cdi->volch = volch;
267 cdi->simplex = simplex;
268 cdi->busy = 1;
269 TAILQ_INSERT_TAIL(&d->dsp_cdevinfo_pool, cdi, link);
270 dev->si_drv1 = cdi;
271 }
272
273 static void
dsp_cdevinfo_free(struct cdev * dev)274 dsp_cdevinfo_free(struct cdev *dev)
275 {
276 struct snddev_info *d;
277 struct dsp_cdevinfo *cdi, *tmp;
278 uint32_t flags;
279 int i;
280
281 d = dsp_get_info(dev);
282
283 KASSERT(PCM_REGISTERED(d) && dev != NULL && dev->si_drv1 != NULL &&
284 PCM_RDCH(dev) == NULL && PCM_WRCH(dev) == NULL &&
285 PCM_VOLCH(dev) == NULL,
286 ("bogus %s(), what are you trying to accomplish here?", __func__));
287 PCM_BUSYASSERT(d);
288 PCM_LOCKASSERT(d);
289
290 cdi = dev->si_drv1;
291 dev->si_drv1 = NULL;
292 cdi->rdch = NULL;
293 cdi->wrch = NULL;
294 cdi->volch = NULL;
295 cdi->simplex = 0;
296 cdi->busy = 0;
297
298 /*
299 * Once it is free, move it back to the beginning of list for
300 * faster new entry allocation.
301 */
302 TAILQ_REMOVE(&d->dsp_cdevinfo_pool, cdi, link);
303 TAILQ_INSERT_HEAD(&d->dsp_cdevinfo_pool, cdi, link);
304
305 /*
306 * Scan the list, cache free entries up to DSP_CDEVINFO_CACHESIZE.
307 * Reset simplex flags.
308 */
309 flags = dsp_get_flags(dev) & ~SD_F_PRIO_SET;
310 i = DSP_CDEVINFO_CACHESIZE;
311 TAILQ_FOREACH_SAFE(cdi, &d->dsp_cdevinfo_pool, link, tmp) {
312 if (cdi->busy != 0) {
313 if (cdi->simplex == 0) {
314 if (cdi->rdch != NULL)
315 flags |= SD_F_PRIO_RD;
316 if (cdi->wrch != NULL)
317 flags |= SD_F_PRIO_WR;
318 }
319 } else {
320 if (i == 0) {
321 TAILQ_REMOVE(&d->dsp_cdevinfo_pool, cdi, link);
322 free(cdi, M_DEVBUF);
323 } else
324 i--;
325 }
326 }
327 dsp_set_flags(dev, flags);
328 }
329
330 void
dsp_cdevinfo_init(struct snddev_info * d)331 dsp_cdevinfo_init(struct snddev_info *d)
332 {
333 struct dsp_cdevinfo *cdi;
334 int i;
335
336 KASSERT(d != NULL, ("NULL snddev_info"));
337 PCM_BUSYASSERT(d);
338 PCM_UNLOCKASSERT(d);
339
340 TAILQ_INIT(&d->dsp_cdevinfo_pool);
341 for (i = 0; i < DSP_CDEVINFO_CACHESIZE; i++) {
342 cdi = malloc(sizeof(*cdi), M_DEVBUF, M_WAITOK | M_ZERO);
343 TAILQ_INSERT_HEAD(&d->dsp_cdevinfo_pool, cdi, link);
344 }
345 }
346
347 void
dsp_cdevinfo_flush(struct snddev_info * d)348 dsp_cdevinfo_flush(struct snddev_info *d)
349 {
350 struct dsp_cdevinfo *cdi, *tmp;
351
352 KASSERT(d != NULL, ("NULL snddev_info"));
353 PCM_BUSYASSERT(d);
354 PCM_UNLOCKASSERT(d);
355
356 cdi = TAILQ_FIRST(&d->dsp_cdevinfo_pool);
357 while (cdi != NULL) {
358 tmp = TAILQ_NEXT(cdi, link);
359 free(cdi, M_DEVBUF);
360 cdi = tmp;
361 }
362 TAILQ_INIT(&d->dsp_cdevinfo_pool);
363 }
364
365 /* duplex / simplex cdev type */
366 enum {
367 DSP_CDEV_TYPE_RDONLY, /* simplex read-only (record) */
368 DSP_CDEV_TYPE_WRONLY, /* simplex write-only (play) */
369 DSP_CDEV_TYPE_RDWR /* duplex read, write, or both */
370 };
371
372 enum {
373 DSP_CDEV_VOLCTL_NONE,
374 DSP_CDEV_VOLCTL_READ,
375 DSP_CDEV_VOLCTL_WRITE
376 };
377
378 #define DSP_F_VALID(x) ((x) & (FREAD | FWRITE))
379 #define DSP_F_DUPLEX(x) (((x) & (FREAD | FWRITE)) == (FREAD | FWRITE))
380 #define DSP_F_SIMPLEX(x) (!DSP_F_DUPLEX(x))
381 #define DSP_F_READ(x) ((x) & FREAD)
382 #define DSP_F_WRITE(x) ((x) & FWRITE)
383
384 static const struct {
385 int type;
386 char *name;
387 char *sep;
388 char *alias;
389 int use_sep;
390 int hw;
391 int max;
392 int volctl;
393 uint32_t fmt, spd;
394 int query;
395 } dsp_cdevs[] = {
396 { SND_DEV_DSP, "dsp", ".", NULL, 0, 0, 0, 0,
397 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
398 DSP_CDEV_TYPE_RDWR },
399 { SND_DEV_AUDIO, "audio", ".", NULL, 0, 0, 0, 0,
400 SND_FORMAT(AFMT_MU_LAW, 1, 0), DSP_DEFAULT_SPEED,
401 DSP_CDEV_TYPE_RDWR },
402 { SND_DEV_DSP16, "dspW", ".", NULL, 0, 0, 0, 0,
403 SND_FORMAT(AFMT_S16_LE, 1, 0), DSP_DEFAULT_SPEED,
404 DSP_CDEV_TYPE_RDWR },
405 { SND_DEV_DSPHW_PLAY, "dsp", ".p", NULL, 1, 1, SND_MAXHWCHAN, 1,
406 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_WRONLY },
407 { SND_DEV_DSPHW_VPLAY, "dsp", ".vp", NULL, 1, 1, SND_MAXVCHANS, 1,
408 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_WRONLY },
409 { SND_DEV_DSPHW_REC, "dsp", ".r", NULL, 1, 1, SND_MAXHWCHAN, 1,
410 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_RDONLY },
411 { SND_DEV_DSPHW_VREC, "dsp", ".vr", NULL, 1, 1, SND_MAXVCHANS, 1,
412 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_RDONLY },
413 { SND_DEV_DSPHW_CD, "dspcd", ".", NULL, 0, 0, 0, 0,
414 SND_FORMAT(AFMT_S16_LE, 2, 0), 44100, DSP_CDEV_TYPE_RDWR },
415 /* Low priority, OSSv4 aliases. */
416 { SND_DEV_DSP, "dsp_ac3", ".", "dsp", 0, 0, 0, 0,
417 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
418 DSP_CDEV_TYPE_RDWR },
419 { SND_DEV_DSP, "dsp_mmap", ".", "dsp", 0, 0, 0, 0,
420 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
421 DSP_CDEV_TYPE_RDWR },
422 { SND_DEV_DSP, "dsp_multich", ".", "dsp", 0, 0, 0, 0,
423 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
424 DSP_CDEV_TYPE_RDWR },
425 { SND_DEV_DSP, "dsp_spdifout", ".", "dsp", 0, 0, 0, 0,
426 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
427 DSP_CDEV_TYPE_RDWR },
428 { SND_DEV_DSP, "dsp_spdifin", ".", "dsp", 0, 0, 0, 0,
429 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
430 DSP_CDEV_TYPE_RDWR },
431 };
432
433 #define DSP_FIXUP_ERROR() do { \
434 prio = dsp_get_flags(i_dev); \
435 if (!DSP_F_VALID(flags)) \
436 error = EINVAL; \
437 if (!DSP_F_DUPLEX(flags) && \
438 ((DSP_F_READ(flags) && d->reccount == 0) || \
439 (DSP_F_WRITE(flags) && d->playcount == 0))) \
440 error = ENOTSUP; \
441 else if (!DSP_F_DUPLEX(flags) && (prio & SD_F_SIMPLEX) && \
442 ((DSP_F_READ(flags) && (prio & SD_F_PRIO_WR)) || \
443 (DSP_F_WRITE(flags) && (prio & SD_F_PRIO_RD)))) \
444 error = EBUSY; \
445 else if (DSP_REGISTERED(d, i_dev)) \
446 error = EBUSY; \
447 } while (0)
448
449 static int
dsp_open(struct cdev * i_dev,int flags,int mode,struct thread * td)450 dsp_open(struct cdev *i_dev, int flags, int mode, struct thread *td)
451 {
452 struct pcm_channel *rdch, *wrch;
453 struct snddev_info *d;
454 uint32_t fmt, spd, prio, volctl;
455 int i, error, rderror, wrerror, devtype, wdevunit, rdevunit;
456
457 /* Kind of impossible.. */
458 if (i_dev == NULL || td == NULL)
459 return (ENODEV);
460
461 d = dsp_get_info(i_dev);
462 if (!PCM_REGISTERED(d))
463 return (EBADF);
464
465 PCM_GIANT_ENTER(d);
466
467 /* Lock snddev so nobody else can monkey with it. */
468 PCM_LOCK(d);
469 PCM_WAIT(d);
470
471 /*
472 * Try to acquire cloned device before someone else pick it.
473 * ENODEV means this is not a cloned droids.
474 */
475 error = snd_clone_acquire(i_dev);
476 if (!(error == 0 || error == ENODEV)) {
477 DSP_FIXUP_ERROR();
478 PCM_UNLOCK(d);
479 PCM_GIANT_EXIT(d);
480 return (error);
481 }
482
483 error = 0;
484 DSP_FIXUP_ERROR();
485
486 if (error != 0) {
487 (void)snd_clone_release(i_dev);
488 PCM_UNLOCK(d);
489 PCM_GIANT_EXIT(d);
490 return (error);
491 }
492
493 /*
494 * That is just enough. Acquire and unlock pcm lock so
495 * the other will just have to wait until we finish doing
496 * everything.
497 */
498 PCM_ACQUIRE(d);
499 PCM_UNLOCK(d);
500
501 devtype = PCMDEV(i_dev);
502 wdevunit = -1;
503 rdevunit = -1;
504 fmt = 0;
505 spd = 0;
506 volctl = DSP_CDEV_VOLCTL_NONE;
507
508 for (i = 0; i < (sizeof(dsp_cdevs) / sizeof(dsp_cdevs[0])); i++) {
509 if (devtype != dsp_cdevs[i].type || dsp_cdevs[i].alias != NULL)
510 continue;
511 /*
512 * Volume control only valid for DSPHW devices,
513 * and it must be opened in opposite direction be it
514 * simplex or duplex. Anything else will be handled
515 * as usual.
516 */
517 if (dsp_cdevs[i].query == DSP_CDEV_TYPE_WRONLY) {
518 if (dsp_cdevs[i].volctl != 0 &&
519 DSP_F_READ(flags)) {
520 volctl = DSP_CDEV_VOLCTL_WRITE;
521 flags &= ~FREAD;
522 flags |= FWRITE;
523 }
524 if (DSP_F_READ(flags)) {
525 (void)snd_clone_release(i_dev);
526 PCM_RELEASE_QUICK(d);
527 PCM_GIANT_EXIT(d);
528 return (ENOTSUP);
529 }
530 wdevunit = dev2unit(i_dev);
531 } else if (dsp_cdevs[i].query == DSP_CDEV_TYPE_RDONLY) {
532 if (dsp_cdevs[i].volctl != 0 &&
533 DSP_F_WRITE(flags)) {
534 volctl = DSP_CDEV_VOLCTL_READ;
535 flags &= ~FWRITE;
536 flags |= FREAD;
537 }
538 if (DSP_F_WRITE(flags)) {
539 (void)snd_clone_release(i_dev);
540 PCM_RELEASE_QUICK(d);
541 PCM_GIANT_EXIT(d);
542 return (ENOTSUP);
543 }
544 rdevunit = dev2unit(i_dev);
545 }
546 fmt = dsp_cdevs[i].fmt;
547 spd = dsp_cdevs[i].spd;
548 break;
549 }
550
551 /* No matching devtype? */
552 if (fmt == 0 || spd == 0)
553 panic("impossible devtype %d", devtype);
554
555 rdch = NULL;
556 wrch = NULL;
557 rderror = 0;
558 wrerror = 0;
559
560 /*
561 * if we get here, the open request is valid- either:
562 * * we were previously not open
563 * * we were open for play xor record and the opener wants
564 * the non-open direction
565 */
566 if (DSP_F_READ(flags)) {
567 /* open for read */
568 rderror = pcm_chnalloc(d, &rdch, PCMDIR_REC,
569 td->td_proc->p_pid, td->td_proc->p_comm, rdevunit);
570
571 if (rderror == 0 && chn_reset(rdch, fmt, spd) != 0)
572 rderror = ENXIO;
573
574 if (volctl == DSP_CDEV_VOLCTL_READ)
575 rderror = 0;
576
577 if (rderror != 0) {
578 if (rdch != NULL)
579 pcm_chnrelease(rdch);
580 if (!DSP_F_DUPLEX(flags)) {
581 (void)snd_clone_release(i_dev);
582 PCM_RELEASE_QUICK(d);
583 PCM_GIANT_EXIT(d);
584 return (rderror);
585 }
586 rdch = NULL;
587 } else if (volctl == DSP_CDEV_VOLCTL_READ) {
588 if (rdch != NULL) {
589 pcm_chnref(rdch, 1);
590 pcm_chnrelease(rdch);
591 }
592 } else {
593 if (flags & O_NONBLOCK)
594 rdch->flags |= CHN_F_NBIO;
595 if (flags & O_EXCL)
596 rdch->flags |= CHN_F_EXCLUSIVE;
597 pcm_chnref(rdch, 1);
598 if (volctl == DSP_CDEV_VOLCTL_NONE)
599 chn_vpc_reset(rdch, SND_VOL_C_PCM, 0);
600 CHN_UNLOCK(rdch);
601 }
602 }
603
604 if (DSP_F_WRITE(flags)) {
605 /* open for write */
606 wrerror = pcm_chnalloc(d, &wrch, PCMDIR_PLAY,
607 td->td_proc->p_pid, td->td_proc->p_comm, wdevunit);
608
609 if (wrerror == 0 && chn_reset(wrch, fmt, spd) != 0)
610 wrerror = ENXIO;
611
612 if (volctl == DSP_CDEV_VOLCTL_WRITE)
613 wrerror = 0;
614
615 if (wrerror != 0) {
616 if (wrch != NULL)
617 pcm_chnrelease(wrch);
618 if (!DSP_F_DUPLEX(flags)) {
619 if (rdch != NULL) {
620 /*
621 * Lock, deref and release previously
622 * created record channel
623 */
624 CHN_LOCK(rdch);
625 pcm_chnref(rdch, -1);
626 pcm_chnrelease(rdch);
627 }
628 (void)snd_clone_release(i_dev);
629 PCM_RELEASE_QUICK(d);
630 PCM_GIANT_EXIT(d);
631 return (wrerror);
632 }
633 wrch = NULL;
634 } else if (volctl == DSP_CDEV_VOLCTL_WRITE) {
635 if (wrch != NULL) {
636 pcm_chnref(wrch, 1);
637 pcm_chnrelease(wrch);
638 }
639 } else {
640 if (flags & O_NONBLOCK)
641 wrch->flags |= CHN_F_NBIO;
642 if (flags & O_EXCL)
643 wrch->flags |= CHN_F_EXCLUSIVE;
644 pcm_chnref(wrch, 1);
645 if (volctl == DSP_CDEV_VOLCTL_NONE)
646 chn_vpc_reset(wrch, SND_VOL_C_PCM, 0);
647 CHN_UNLOCK(wrch);
648 }
649 }
650
651
652 PCM_LOCK(d);
653
654 /*
655 * We're done. Allocate channels information for this cdev.
656 */
657 switch (volctl) {
658 case DSP_CDEV_VOLCTL_READ:
659 KASSERT(wrch == NULL, ("wrch=%p not null!", wrch));
660 dsp_cdevinfo_alloc(i_dev, NULL, NULL, rdch);
661 break;
662 case DSP_CDEV_VOLCTL_WRITE:
663 KASSERT(rdch == NULL, ("rdch=%p not null!", rdch));
664 dsp_cdevinfo_alloc(i_dev, NULL, NULL, wrch);
665 break;
666 case DSP_CDEV_VOLCTL_NONE:
667 default:
668 if (wrch == NULL && rdch == NULL) {
669 (void)snd_clone_release(i_dev);
670 PCM_RELEASE(d);
671 PCM_UNLOCK(d);
672 PCM_GIANT_EXIT(d);
673 if (wrerror != 0)
674 return (wrerror);
675 if (rderror != 0)
676 return (rderror);
677 return (EINVAL);
678 }
679 dsp_cdevinfo_alloc(i_dev, rdch, wrch, NULL);
680 if (rdch != NULL)
681 CHN_INSERT_HEAD(d, rdch, channels.pcm.opened);
682 if (wrch != NULL)
683 CHN_INSERT_HEAD(d, wrch, channels.pcm.opened);
684 break;
685 }
686
687 /*
688 * Increase clone refcount for its automatic garbage collector.
689 */
690 (void)snd_clone_ref(i_dev);
691
692 PCM_RELEASE(d);
693 PCM_UNLOCK(d);
694
695 PCM_GIANT_LEAVE(d);
696
697 return (0);
698 }
699
700 static int
dsp_close(struct cdev * i_dev,int flags,int mode,struct thread * td)701 dsp_close(struct cdev *i_dev, int flags, int mode, struct thread *td)
702 {
703 struct pcm_channel *rdch, *wrch, *volch;
704 struct snddev_info *d;
705 int sg_ids, rdref, wdref;
706
707 d = dsp_get_info(i_dev);
708 if (!DSP_REGISTERED(d, i_dev))
709 return (EBADF);
710
711 PCM_GIANT_ENTER(d);
712
713 PCM_LOCK(d);
714 PCM_WAIT(d);
715 PCM_ACQUIRE(d);
716
717 rdch = PCM_RDCH(i_dev);
718 wrch = PCM_WRCH(i_dev);
719 volch = PCM_VOLCH(i_dev);
720
721 PCM_RDCH(i_dev) = NULL;
722 PCM_WRCH(i_dev) = NULL;
723 PCM_VOLCH(i_dev) = NULL;
724
725 rdref = -1;
726 wdref = -1;
727
728 if (volch != NULL) {
729 if (volch == rdch)
730 rdref--;
731 else if (volch == wrch)
732 wdref--;
733 else {
734 CHN_LOCK(volch);
735 pcm_chnref(volch, -1);
736 CHN_UNLOCK(volch);
737 }
738 }
739
740 if (rdch != NULL)
741 CHN_REMOVE(d, rdch, channels.pcm.opened);
742 if (wrch != NULL)
743 CHN_REMOVE(d, wrch, channels.pcm.opened);
744
745 if (rdch != NULL || wrch != NULL) {
746 PCM_UNLOCK(d);
747 if (rdch != NULL) {
748 /*
749 * The channel itself need not be locked because:
750 * a) Adding a channel to a syncgroup happens only
751 * in dsp_ioctl(), which cannot run concurrently
752 * to dsp_close().
753 * b) The syncmember pointer (sm) is protected by
754 * the global syncgroup list lock.
755 * c) A channel can't just disappear, invalidating
756 * pointers, unless it's closed/dereferenced
757 * first.
758 */
759 PCM_SG_LOCK();
760 sg_ids = chn_syncdestroy(rdch);
761 PCM_SG_UNLOCK();
762 if (sg_ids != 0)
763 free_unr(pcmsg_unrhdr, sg_ids);
764
765 CHN_LOCK(rdch);
766 pcm_chnref(rdch, rdref);
767 chn_abort(rdch); /* won't sleep */
768 rdch->flags &= ~(CHN_F_RUNNING | CHN_F_MMAP |
769 CHN_F_DEAD | CHN_F_EXCLUSIVE);
770 chn_reset(rdch, 0, 0);
771 pcm_chnrelease(rdch);
772 }
773 if (wrch != NULL) {
774 /*
775 * Please see block above.
776 */
777 PCM_SG_LOCK();
778 sg_ids = chn_syncdestroy(wrch);
779 PCM_SG_UNLOCK();
780 if (sg_ids != 0)
781 free_unr(pcmsg_unrhdr, sg_ids);
782
783 CHN_LOCK(wrch);
784 pcm_chnref(wrch, wdref);
785 chn_flush(wrch); /* may sleep */
786 wrch->flags &= ~(CHN_F_RUNNING | CHN_F_MMAP |
787 CHN_F_DEAD | CHN_F_EXCLUSIVE);
788 chn_reset(wrch, 0, 0);
789 pcm_chnrelease(wrch);
790 }
791 PCM_LOCK(d);
792 }
793
794 dsp_cdevinfo_free(i_dev);
795 /*
796 * Release clone busy state and unref it so the automatic
797 * garbage collector will get the hint and do the remaining
798 * cleanup process.
799 */
800 (void)snd_clone_release(i_dev);
801
802 /*
803 * destroy_dev() might sleep, so release pcm lock
804 * here and rely on pcm cv serialization.
805 */
806 PCM_UNLOCK(d);
807 (void)snd_clone_unref(i_dev);
808 PCM_LOCK(d);
809
810 PCM_RELEASE(d);
811 PCM_UNLOCK(d);
812
813 PCM_GIANT_LEAVE(d);
814
815 return (0);
816 }
817
818 static __inline int
dsp_io_ops(struct cdev * i_dev,struct uio * buf)819 dsp_io_ops(struct cdev *i_dev, struct uio *buf)
820 {
821 struct snddev_info *d;
822 struct pcm_channel **ch, *rdch, *wrch;
823 int (*chn_io)(struct pcm_channel *, struct uio *);
824 int prio, ret;
825 pid_t runpid;
826
827 KASSERT(i_dev != NULL && buf != NULL &&
828 (buf->uio_rw == UIO_READ || buf->uio_rw == UIO_WRITE),
829 ("%s(): io train wreck!", __func__));
830
831 d = dsp_get_info(i_dev);
832 if (!DSP_REGISTERED(d, i_dev))
833 return (EBADF);
834
835 PCM_GIANT_ENTER(d);
836
837 switch (buf->uio_rw) {
838 case UIO_READ:
839 prio = SD_F_PRIO_RD;
840 ch = &rdch;
841 chn_io = chn_read;
842 break;
843 case UIO_WRITE:
844 prio = SD_F_PRIO_WR;
845 ch = &wrch;
846 chn_io = chn_write;
847 break;
848 default:
849 panic("invalid/corrupted uio direction: %d", buf->uio_rw);
850 break;
851 }
852
853 rdch = NULL;
854 wrch = NULL;
855 runpid = buf->uio_td->td_proc->p_pid;
856
857 getchns(i_dev, &rdch, &wrch, prio);
858
859 if (*ch == NULL || !((*ch)->flags & CHN_F_BUSY)) {
860 PCM_GIANT_EXIT(d);
861 return (EBADF);
862 }
863
864 if (((*ch)->flags & (CHN_F_MMAP | CHN_F_DEAD)) ||
865 (((*ch)->flags & CHN_F_RUNNING) && (*ch)->pid != runpid)) {
866 relchns(i_dev, rdch, wrch, prio);
867 PCM_GIANT_EXIT(d);
868 return (EINVAL);
869 } else if (!((*ch)->flags & CHN_F_RUNNING)) {
870 (*ch)->flags |= CHN_F_RUNNING;
871 (*ch)->pid = runpid;
872 }
873
874 /*
875 * chn_read/write must give up channel lock in order to copy bytes
876 * from/to userland, so up the "in progress" counter to make sure
877 * someone else doesn't come along and muss up the buffer.
878 */
879 ++(*ch)->inprog;
880 ret = chn_io(*ch, buf);
881 --(*ch)->inprog;
882
883 CHN_BROADCAST(&(*ch)->cv);
884
885 relchns(i_dev, rdch, wrch, prio);
886
887 PCM_GIANT_LEAVE(d);
888
889 return (ret);
890 }
891
892 static int
dsp_read(struct cdev * i_dev,struct uio * buf,int flag)893 dsp_read(struct cdev *i_dev, struct uio *buf, int flag)
894 {
895 return (dsp_io_ops(i_dev, buf));
896 }
897
898 static int
dsp_write(struct cdev * i_dev,struct uio * buf,int flag)899 dsp_write(struct cdev *i_dev, struct uio *buf, int flag)
900 {
901 return (dsp_io_ops(i_dev, buf));
902 }
903
904 static int
dsp_get_volume_channel(struct cdev * dev,struct pcm_channel ** volch)905 dsp_get_volume_channel(struct cdev *dev, struct pcm_channel **volch)
906 {
907 struct snddev_info *d;
908 struct pcm_channel *c;
909 int unit;
910
911 KASSERT(dev != NULL && volch != NULL,
912 ("%s(): NULL query dev=%p volch=%p", __func__, dev, volch));
913
914 d = dsp_get_info(dev);
915 if (!PCM_REGISTERED(d)) {
916 *volch = NULL;
917 return (EINVAL);
918 }
919
920 PCM_UNLOCKASSERT(d);
921
922 *volch = NULL;
923
924 c = PCM_VOLCH(dev);
925 if (c != NULL) {
926 if (!(c->feederflags & (1 << FEEDER_VOLUME)))
927 return (-1);
928 *volch = c;
929 return (0);
930 }
931
932 PCM_LOCK(d);
933 PCM_WAIT(d);
934 PCM_ACQUIRE(d);
935
936 unit = dev2unit(dev);
937
938 CHN_FOREACH(c, d, channels.pcm) {
939 CHN_LOCK(c);
940 if (c->unit != unit) {
941 CHN_UNLOCK(c);
942 continue;
943 }
944 *volch = c;
945 pcm_chnref(c, 1);
946 PCM_VOLCH(dev) = c;
947 CHN_UNLOCK(c);
948 PCM_RELEASE(d);
949 PCM_UNLOCK(d);
950 return ((c->feederflags & (1 << FEEDER_VOLUME)) ? 0 : -1);
951 }
952
953 PCM_RELEASE(d);
954 PCM_UNLOCK(d);
955
956 return (EINVAL);
957 }
958
959 static int
dsp_ioctl_channel(struct cdev * dev,struct pcm_channel * volch,u_long cmd,caddr_t arg)960 dsp_ioctl_channel(struct cdev *dev, struct pcm_channel *volch, u_long cmd,
961 caddr_t arg)
962 {
963 struct snddev_info *d;
964 struct pcm_channel *rdch, *wrch;
965 int j, devtype, ret;
966
967 d = dsp_get_info(dev);
968 if (!PCM_REGISTERED(d) || !(dsp_get_flags(dev) & SD_F_VPC))
969 return (-1);
970
971 PCM_UNLOCKASSERT(d);
972
973 j = cmd & 0xff;
974
975 rdch = PCM_RDCH(dev);
976 wrch = PCM_WRCH(dev);
977
978 /* No specific channel, look into cache */
979 if (volch == NULL)
980 volch = PCM_VOLCH(dev);
981
982 /* Look harder */
983 if (volch == NULL) {
984 if (j == SOUND_MIXER_RECLEV && rdch != NULL)
985 volch = rdch;
986 else if (j == SOUND_MIXER_PCM && wrch != NULL)
987 volch = wrch;
988 }
989
990 devtype = PCMDEV(dev);
991
992 /* Look super harder */
993 if (volch == NULL &&
994 (devtype == SND_DEV_DSPHW_PLAY || devtype == SND_DEV_DSPHW_VPLAY ||
995 devtype == SND_DEV_DSPHW_REC || devtype == SND_DEV_DSPHW_VREC)) {
996 ret = dsp_get_volume_channel(dev, &volch);
997 if (ret != 0)
998 return (ret);
999 if (volch == NULL)
1000 return (EINVAL);
1001 }
1002
1003 /* Final validation */
1004 if (volch != NULL) {
1005 CHN_LOCK(volch);
1006 if (!(volch->feederflags & (1 << FEEDER_VOLUME))) {
1007 CHN_UNLOCK(volch);
1008 return (-1);
1009 }
1010 if (volch->direction == PCMDIR_PLAY)
1011 wrch = volch;
1012 else
1013 rdch = volch;
1014 }
1015
1016 ret = EINVAL;
1017
1018 if (volch != NULL &&
1019 ((j == SOUND_MIXER_PCM && volch->direction == PCMDIR_PLAY) ||
1020 (j == SOUND_MIXER_RECLEV && volch->direction == PCMDIR_REC))) {
1021 if ((cmd & ~0xff) == MIXER_WRITE(0)) {
1022 int left, right, center;
1023
1024 left = *(int *)arg & 0x7f;
1025 right = ((*(int *)arg) >> 8) & 0x7f;
1026 center = (left + right) >> 1;
1027 chn_setvolume_multi(volch, SND_VOL_C_PCM, left, right,
1028 center);
1029 } else if ((cmd & ~0xff) == MIXER_READ(0)) {
1030 *(int *)arg = CHN_GETVOLUME(volch,
1031 SND_VOL_C_PCM, SND_CHN_T_FL);
1032 *(int *)arg |= CHN_GETVOLUME(volch,
1033 SND_VOL_C_PCM, SND_CHN_T_FR) << 8;
1034 }
1035 ret = 0;
1036 } else if (rdch != NULL || wrch != NULL) {
1037 switch (j) {
1038 case SOUND_MIXER_DEVMASK:
1039 case SOUND_MIXER_CAPS:
1040 case SOUND_MIXER_STEREODEVS:
1041 if ((cmd & ~0xff) == MIXER_READ(0)) {
1042 *(int *)arg = 0;
1043 if (rdch != NULL)
1044 *(int *)arg |= SOUND_MASK_RECLEV;
1045 if (wrch != NULL)
1046 *(int *)arg |= SOUND_MASK_PCM;
1047 }
1048 ret = 0;
1049 break;
1050 case SOUND_MIXER_RECMASK:
1051 case SOUND_MIXER_RECSRC:
1052 if ((cmd & ~0xff) == MIXER_READ(0))
1053 *(int *)arg = 0;
1054 ret = 0;
1055 break;
1056 default:
1057 break;
1058 }
1059 }
1060
1061 if (volch != NULL)
1062 CHN_UNLOCK(volch);
1063
1064 return (ret);
1065 }
1066
1067 static int
dsp_ioctl(struct cdev * i_dev,u_long cmd,caddr_t arg,int mode,struct thread * td)1068 dsp_ioctl(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode,
1069 struct thread *td)
1070 {
1071 struct pcm_channel *chn, *rdch, *wrch;
1072 struct snddev_info *d;
1073 u_long xcmd;
1074 int *arg_i, ret, tmp;
1075
1076 d = dsp_get_info(i_dev);
1077 if (!DSP_REGISTERED(d, i_dev))
1078 return (EBADF);
1079
1080 PCM_GIANT_ENTER(d);
1081
1082 arg_i = (int *)arg;
1083 ret = 0;
1084 xcmd = 0;
1085 chn = NULL;
1086
1087 if (IOCGROUP(cmd) == 'M') {
1088 if (cmd == OSS_GETVERSION) {
1089 *arg_i = SOUND_VERSION;
1090 PCM_GIANT_EXIT(d);
1091 return (0);
1092 }
1093 ret = dsp_ioctl_channel(i_dev, PCM_VOLCH(i_dev), cmd, arg);
1094 if (ret != -1) {
1095 PCM_GIANT_EXIT(d);
1096 return (ret);
1097 }
1098
1099 if (d->mixer_dev != NULL) {
1100 PCM_ACQUIRE_QUICK(d);
1101 ret = mixer_ioctl_cmd(d->mixer_dev, cmd, arg, -1, td,
1102 MIXER_CMD_DIRECT);
1103 PCM_RELEASE_QUICK(d);
1104 } else
1105 ret = EBADF;
1106
1107 PCM_GIANT_EXIT(d);
1108
1109 return (ret);
1110 }
1111
1112 /*
1113 * Certain ioctls may be made on any type of device (audio, mixer,
1114 * and MIDI). Handle those special cases here.
1115 */
1116 if (IOCGROUP(cmd) == 'X') {
1117 PCM_ACQUIRE_QUICK(d);
1118 switch(cmd) {
1119 case SNDCTL_SYSINFO:
1120 sound_oss_sysinfo((oss_sysinfo *)arg);
1121 break;
1122 case SNDCTL_CARDINFO:
1123 ret = sound_oss_card_info((oss_card_info *)arg);
1124 break;
1125 case SNDCTL_AUDIOINFO:
1126 case SNDCTL_AUDIOINFO_EX:
1127 case SNDCTL_ENGINEINFO:
1128 ret = dsp_oss_audioinfo(i_dev, (oss_audioinfo *)arg);
1129 break;
1130 case SNDCTL_MIXERINFO:
1131 ret = mixer_oss_mixerinfo(i_dev, (oss_mixerinfo *)arg);
1132 break;
1133 default:
1134 ret = EINVAL;
1135 }
1136 PCM_RELEASE_QUICK(d);
1137 PCM_GIANT_EXIT(d);
1138 return (ret);
1139 }
1140
1141 getchns(i_dev, &rdch, &wrch, 0);
1142
1143 if (wrch != NULL && (wrch->flags & CHN_F_DEAD))
1144 wrch = NULL;
1145 if (rdch != NULL && (rdch->flags & CHN_F_DEAD))
1146 rdch = NULL;
1147
1148 if (wrch == NULL && rdch == NULL) {
1149 PCM_GIANT_EXIT(d);
1150 return (EINVAL);
1151 }
1152
1153 switch(cmd) {
1154 #ifdef OLDPCM_IOCTL
1155 /*
1156 * we start with the new ioctl interface.
1157 */
1158 case AIONWRITE: /* how many bytes can write ? */
1159 if (wrch) {
1160 CHN_LOCK(wrch);
1161 /*
1162 if (wrch && wrch->bufhard.dl)
1163 while (chn_wrfeed(wrch) == 0);
1164 */
1165 *arg_i = sndbuf_getfree(wrch->bufsoft);
1166 CHN_UNLOCK(wrch);
1167 } else {
1168 *arg_i = 0;
1169 ret = EINVAL;
1170 }
1171 break;
1172
1173 case AIOSSIZE: /* set the current blocksize */
1174 {
1175 struct snd_size *p = (struct snd_size *)arg;
1176
1177 p->play_size = 0;
1178 p->rec_size = 0;
1179 PCM_ACQUIRE_QUICK(d);
1180 if (wrch) {
1181 CHN_LOCK(wrch);
1182 chn_setblocksize(wrch, 2, p->play_size);
1183 p->play_size = sndbuf_getblksz(wrch->bufsoft);
1184 CHN_UNLOCK(wrch);
1185 }
1186 if (rdch) {
1187 CHN_LOCK(rdch);
1188 chn_setblocksize(rdch, 2, p->rec_size);
1189 p->rec_size = sndbuf_getblksz(rdch->bufsoft);
1190 CHN_UNLOCK(rdch);
1191 }
1192 PCM_RELEASE_QUICK(d);
1193 }
1194 break;
1195 case AIOGSIZE: /* get the current blocksize */
1196 {
1197 struct snd_size *p = (struct snd_size *)arg;
1198
1199 if (wrch) {
1200 CHN_LOCK(wrch);
1201 p->play_size = sndbuf_getblksz(wrch->bufsoft);
1202 CHN_UNLOCK(wrch);
1203 }
1204 if (rdch) {
1205 CHN_LOCK(rdch);
1206 p->rec_size = sndbuf_getblksz(rdch->bufsoft);
1207 CHN_UNLOCK(rdch);
1208 }
1209 }
1210 break;
1211
1212 case AIOSFMT:
1213 case AIOGFMT:
1214 {
1215 snd_chan_param *p = (snd_chan_param *)arg;
1216
1217 if (cmd == AIOSFMT &&
1218 ((p->play_format != 0 && p->play_rate == 0) ||
1219 (p->rec_format != 0 && p->rec_rate == 0))) {
1220 ret = EINVAL;
1221 break;
1222 }
1223 PCM_ACQUIRE_QUICK(d);
1224 if (wrch) {
1225 CHN_LOCK(wrch);
1226 if (cmd == AIOSFMT && p->play_format != 0) {
1227 chn_setformat(wrch,
1228 SND_FORMAT(p->play_format,
1229 AFMT_CHANNEL(wrch->format),
1230 AFMT_EXTCHANNEL(wrch->format)));
1231 chn_setspeed(wrch, p->play_rate);
1232 }
1233 p->play_rate = wrch->speed;
1234 p->play_format = AFMT_ENCODING(wrch->format);
1235 CHN_UNLOCK(wrch);
1236 } else {
1237 p->play_rate = 0;
1238 p->play_format = 0;
1239 }
1240 if (rdch) {
1241 CHN_LOCK(rdch);
1242 if (cmd == AIOSFMT && p->rec_format != 0) {
1243 chn_setformat(rdch,
1244 SND_FORMAT(p->rec_format,
1245 AFMT_CHANNEL(rdch->format),
1246 AFMT_EXTCHANNEL(rdch->format)));
1247 chn_setspeed(rdch, p->rec_rate);
1248 }
1249 p->rec_rate = rdch->speed;
1250 p->rec_format = AFMT_ENCODING(rdch->format);
1251 CHN_UNLOCK(rdch);
1252 } else {
1253 p->rec_rate = 0;
1254 p->rec_format = 0;
1255 }
1256 PCM_RELEASE_QUICK(d);
1257 }
1258 break;
1259
1260 case AIOGCAP: /* get capabilities */
1261 {
1262 snd_capabilities *p = (snd_capabilities *)arg;
1263 struct pcmchan_caps *pcaps = NULL, *rcaps = NULL;
1264 struct cdev *pdev;
1265
1266 PCM_LOCK(d);
1267 if (rdch) {
1268 CHN_LOCK(rdch);
1269 rcaps = chn_getcaps(rdch);
1270 }
1271 if (wrch) {
1272 CHN_LOCK(wrch);
1273 pcaps = chn_getcaps(wrch);
1274 }
1275 p->rate_min = max(rcaps? rcaps->minspeed : 0,
1276 pcaps? pcaps->minspeed : 0);
1277 p->rate_max = min(rcaps? rcaps->maxspeed : 1000000,
1278 pcaps? pcaps->maxspeed : 1000000);
1279 p->bufsize = min(rdch? sndbuf_getsize(rdch->bufsoft) : 1000000,
1280 wrch? sndbuf_getsize(wrch->bufsoft) : 1000000);
1281 /* XXX bad on sb16 */
1282 p->formats = (rdch? chn_getformats(rdch) : 0xffffffff) &
1283 (wrch? chn_getformats(wrch) : 0xffffffff);
1284 if (rdch && wrch)
1285 p->formats |= (dsp_get_flags(i_dev) & SD_F_SIMPLEX)? 0 : AFMT_FULLDUPLEX;
1286 pdev = d->mixer_dev;
1287 p->mixers = 1; /* default: one mixer */
1288 p->inputs = pdev->si_drv1? mix_getdevs(pdev->si_drv1) : 0;
1289 p->left = p->right = 100;
1290 if (wrch)
1291 CHN_UNLOCK(wrch);
1292 if (rdch)
1293 CHN_UNLOCK(rdch);
1294 PCM_UNLOCK(d);
1295 }
1296 break;
1297
1298 case AIOSTOP:
1299 if (*arg_i == AIOSYNC_PLAY && wrch) {
1300 CHN_LOCK(wrch);
1301 *arg_i = chn_abort(wrch);
1302 CHN_UNLOCK(wrch);
1303 } else if (*arg_i == AIOSYNC_CAPTURE && rdch) {
1304 CHN_LOCK(rdch);
1305 *arg_i = chn_abort(rdch);
1306 CHN_UNLOCK(rdch);
1307 } else {
1308 printf("AIOSTOP: bad channel 0x%x\n", *arg_i);
1309 *arg_i = 0;
1310 }
1311 break;
1312
1313 case AIOSYNC:
1314 printf("AIOSYNC chan 0x%03lx pos %lu unimplemented\n",
1315 ((snd_sync_parm *)arg)->chan, ((snd_sync_parm *)arg)->pos);
1316 break;
1317 #endif
1318 /*
1319 * here follow the standard ioctls (filio.h etc.)
1320 */
1321 case FIONREAD: /* get # bytes to read */
1322 if (rdch) {
1323 CHN_LOCK(rdch);
1324 /* if (rdch && rdch->bufhard.dl)
1325 while (chn_rdfeed(rdch) == 0);
1326 */
1327 *arg_i = sndbuf_getready(rdch->bufsoft);
1328 CHN_UNLOCK(rdch);
1329 } else {
1330 *arg_i = 0;
1331 ret = EINVAL;
1332 }
1333 break;
1334
1335 case FIOASYNC: /*set/clear async i/o */
1336 DEB( printf("FIOASYNC\n") ; )
1337 break;
1338
1339 case SNDCTL_DSP_NONBLOCK: /* set non-blocking i/o */
1340 case FIONBIO: /* set/clear non-blocking i/o */
1341 if (rdch) {
1342 CHN_LOCK(rdch);
1343 if (cmd == SNDCTL_DSP_NONBLOCK || *arg_i)
1344 rdch->flags |= CHN_F_NBIO;
1345 else
1346 rdch->flags &= ~CHN_F_NBIO;
1347 CHN_UNLOCK(rdch);
1348 }
1349 if (wrch) {
1350 CHN_LOCK(wrch);
1351 if (cmd == SNDCTL_DSP_NONBLOCK || *arg_i)
1352 wrch->flags |= CHN_F_NBIO;
1353 else
1354 wrch->flags &= ~CHN_F_NBIO;
1355 CHN_UNLOCK(wrch);
1356 }
1357 break;
1358
1359 /*
1360 * Finally, here is the linux-compatible ioctl interface
1361 */
1362 #define THE_REAL_SNDCTL_DSP_GETBLKSIZE _IOWR('P', 4, int)
1363 case THE_REAL_SNDCTL_DSP_GETBLKSIZE:
1364 case SNDCTL_DSP_GETBLKSIZE:
1365 chn = wrch ? wrch : rdch;
1366 if (chn) {
1367 CHN_LOCK(chn);
1368 *arg_i = sndbuf_getblksz(chn->bufsoft);
1369 CHN_UNLOCK(chn);
1370 } else {
1371 *arg_i = 0;
1372 ret = EINVAL;
1373 }
1374 break;
1375
1376 case SNDCTL_DSP_SETBLKSIZE:
1377 RANGE(*arg_i, 16, 65536);
1378 PCM_ACQUIRE_QUICK(d);
1379 if (wrch) {
1380 CHN_LOCK(wrch);
1381 chn_setblocksize(wrch, 2, *arg_i);
1382 CHN_UNLOCK(wrch);
1383 }
1384 if (rdch) {
1385 CHN_LOCK(rdch);
1386 chn_setblocksize(rdch, 2, *arg_i);
1387 CHN_UNLOCK(rdch);
1388 }
1389 PCM_RELEASE_QUICK(d);
1390 break;
1391
1392 case SNDCTL_DSP_RESET:
1393 DEB(printf("dsp reset\n"));
1394 if (wrch) {
1395 CHN_LOCK(wrch);
1396 chn_abort(wrch);
1397 chn_resetbuf(wrch);
1398 CHN_UNLOCK(wrch);
1399 }
1400 if (rdch) {
1401 CHN_LOCK(rdch);
1402 chn_abort(rdch);
1403 chn_resetbuf(rdch);
1404 CHN_UNLOCK(rdch);
1405 }
1406 break;
1407
1408 case SNDCTL_DSP_SYNC:
1409 DEB(printf("dsp sync\n"));
1410 /* chn_sync may sleep */
1411 if (wrch) {
1412 CHN_LOCK(wrch);
1413 chn_sync(wrch, 0);
1414 CHN_UNLOCK(wrch);
1415 }
1416 break;
1417
1418 case SNDCTL_DSP_SPEED:
1419 /* chn_setspeed may sleep */
1420 tmp = 0;
1421 PCM_ACQUIRE_QUICK(d);
1422 if (wrch) {
1423 CHN_LOCK(wrch);
1424 ret = chn_setspeed(wrch, *arg_i);
1425 tmp = wrch->speed;
1426 CHN_UNLOCK(wrch);
1427 }
1428 if (rdch && ret == 0) {
1429 CHN_LOCK(rdch);
1430 ret = chn_setspeed(rdch, *arg_i);
1431 if (tmp == 0)
1432 tmp = rdch->speed;
1433 CHN_UNLOCK(rdch);
1434 }
1435 PCM_RELEASE_QUICK(d);
1436 *arg_i = tmp;
1437 break;
1438
1439 case SOUND_PCM_READ_RATE:
1440 chn = wrch ? wrch : rdch;
1441 if (chn) {
1442 CHN_LOCK(chn);
1443 *arg_i = chn->speed;
1444 CHN_UNLOCK(chn);
1445 } else {
1446 *arg_i = 0;
1447 ret = EINVAL;
1448 }
1449 break;
1450
1451 case SNDCTL_DSP_STEREO:
1452 tmp = -1;
1453 *arg_i = (*arg_i)? 2 : 1;
1454 PCM_ACQUIRE_QUICK(d);
1455 if (wrch) {
1456 CHN_LOCK(wrch);
1457 ret = chn_setformat(wrch,
1458 SND_FORMAT(wrch->format, *arg_i, 0));
1459 tmp = (AFMT_CHANNEL(wrch->format) > 1)? 1 : 0;
1460 CHN_UNLOCK(wrch);
1461 }
1462 if (rdch && ret == 0) {
1463 CHN_LOCK(rdch);
1464 ret = chn_setformat(rdch,
1465 SND_FORMAT(rdch->format, *arg_i, 0));
1466 if (tmp == -1)
1467 tmp = (AFMT_CHANNEL(rdch->format) > 1)? 1 : 0;
1468 CHN_UNLOCK(rdch);
1469 }
1470 PCM_RELEASE_QUICK(d);
1471 *arg_i = tmp;
1472 break;
1473
1474 case SOUND_PCM_WRITE_CHANNELS:
1475 /* case SNDCTL_DSP_CHANNELS: ( == SOUND_PCM_WRITE_CHANNELS) */
1476 if (*arg_i < 0) {
1477 *arg_i = 0;
1478 ret = EINVAL;
1479 break;
1480 }
1481 if (*arg_i != 0) {
1482 struct pcmchan_matrix *m;
1483 uint32_t ext;
1484
1485 tmp = 0;
1486 if (*arg_i > SND_CHN_MAX)
1487 *arg_i = SND_CHN_MAX;
1488
1489 m = feeder_matrix_default_channel_map(*arg_i);
1490 if (m != NULL)
1491 ext = m->ext;
1492 else
1493 ext = 0;
1494
1495 PCM_ACQUIRE_QUICK(d);
1496 if (wrch) {
1497 CHN_LOCK(wrch);
1498 ret = chn_setformat(wrch,
1499 SND_FORMAT(wrch->format, *arg_i, ext));
1500 tmp = AFMT_CHANNEL(wrch->format);
1501 CHN_UNLOCK(wrch);
1502 }
1503 if (rdch && ret == 0) {
1504 CHN_LOCK(rdch);
1505 ret = chn_setformat(rdch,
1506 SND_FORMAT(rdch->format, *arg_i, ext));
1507 if (tmp == 0)
1508 tmp = AFMT_CHANNEL(rdch->format);
1509 CHN_UNLOCK(rdch);
1510 }
1511 PCM_RELEASE_QUICK(d);
1512 *arg_i = tmp;
1513 } else {
1514 chn = wrch ? wrch : rdch;
1515 CHN_LOCK(chn);
1516 *arg_i = AFMT_CHANNEL(chn->format);
1517 CHN_UNLOCK(chn);
1518 }
1519 break;
1520
1521 case SOUND_PCM_READ_CHANNELS:
1522 chn = wrch ? wrch : rdch;
1523 if (chn) {
1524 CHN_LOCK(chn);
1525 *arg_i = AFMT_CHANNEL(chn->format);
1526 CHN_UNLOCK(chn);
1527 } else {
1528 *arg_i = 0;
1529 ret = EINVAL;
1530 }
1531 break;
1532
1533 case SNDCTL_DSP_GETFMTS: /* returns a mask of supported fmts */
1534 chn = wrch ? wrch : rdch;
1535 if (chn) {
1536 CHN_LOCK(chn);
1537 *arg_i = chn_getformats(chn);
1538 CHN_UNLOCK(chn);
1539 } else {
1540 *arg_i = 0;
1541 ret = EINVAL;
1542 }
1543 break;
1544
1545 case SNDCTL_DSP_SETFMT: /* sets _one_ format */
1546 if (*arg_i != AFMT_QUERY) {
1547 tmp = 0;
1548 PCM_ACQUIRE_QUICK(d);
1549 if (wrch) {
1550 CHN_LOCK(wrch);
1551 ret = chn_setformat(wrch, SND_FORMAT(*arg_i,
1552 AFMT_CHANNEL(wrch->format),
1553 AFMT_EXTCHANNEL(wrch->format)));
1554 tmp = wrch->format;
1555 CHN_UNLOCK(wrch);
1556 }
1557 if (rdch && ret == 0) {
1558 CHN_LOCK(rdch);
1559 ret = chn_setformat(rdch, SND_FORMAT(*arg_i,
1560 AFMT_CHANNEL(rdch->format),
1561 AFMT_EXTCHANNEL(rdch->format)));
1562 if (tmp == 0)
1563 tmp = rdch->format;
1564 CHN_UNLOCK(rdch);
1565 }
1566 PCM_RELEASE_QUICK(d);
1567 *arg_i = AFMT_ENCODING(tmp);
1568 } else {
1569 chn = wrch ? wrch : rdch;
1570 CHN_LOCK(chn);
1571 *arg_i = AFMT_ENCODING(chn->format);
1572 CHN_UNLOCK(chn);
1573 }
1574 break;
1575
1576 case SNDCTL_DSP_SETFRAGMENT:
1577 DEB(printf("SNDCTL_DSP_SETFRAGMENT 0x%08x\n", *(int *)arg));
1578 {
1579 uint32_t fragln = (*arg_i) & 0x0000ffff;
1580 uint32_t maxfrags = ((*arg_i) & 0xffff0000) >> 16;
1581 uint32_t fragsz;
1582 uint32_t r_maxfrags, r_fragsz;
1583
1584 RANGE(fragln, 4, 16);
1585 fragsz = 1 << fragln;
1586
1587 if (maxfrags == 0)
1588 maxfrags = CHN_2NDBUFMAXSIZE / fragsz;
1589 if (maxfrags < 2)
1590 maxfrags = 2;
1591 if (maxfrags * fragsz > CHN_2NDBUFMAXSIZE)
1592 maxfrags = CHN_2NDBUFMAXSIZE / fragsz;
1593
1594 DEB(printf("SNDCTL_DSP_SETFRAGMENT %d frags, %d sz\n", maxfrags, fragsz));
1595 PCM_ACQUIRE_QUICK(d);
1596 if (rdch) {
1597 CHN_LOCK(rdch);
1598 ret = chn_setblocksize(rdch, maxfrags, fragsz);
1599 r_maxfrags = sndbuf_getblkcnt(rdch->bufsoft);
1600 r_fragsz = sndbuf_getblksz(rdch->bufsoft);
1601 CHN_UNLOCK(rdch);
1602 } else {
1603 r_maxfrags = maxfrags;
1604 r_fragsz = fragsz;
1605 }
1606 if (wrch && ret == 0) {
1607 CHN_LOCK(wrch);
1608 ret = chn_setblocksize(wrch, maxfrags, fragsz);
1609 maxfrags = sndbuf_getblkcnt(wrch->bufsoft);
1610 fragsz = sndbuf_getblksz(wrch->bufsoft);
1611 CHN_UNLOCK(wrch);
1612 } else { /* use whatever came from the read channel */
1613 maxfrags = r_maxfrags;
1614 fragsz = r_fragsz;
1615 }
1616 PCM_RELEASE_QUICK(d);
1617
1618 fragln = 0;
1619 while (fragsz > 1) {
1620 fragln++;
1621 fragsz >>= 1;
1622 }
1623 *arg_i = (maxfrags << 16) | fragln;
1624 }
1625 break;
1626
1627 case SNDCTL_DSP_GETISPACE:
1628 /* return the size of data available in the input queue */
1629 {
1630 audio_buf_info *a = (audio_buf_info *)arg;
1631 if (rdch) {
1632 struct snd_dbuf *bs = rdch->bufsoft;
1633
1634 CHN_LOCK(rdch);
1635 a->bytes = sndbuf_getready(bs);
1636 a->fragments = a->bytes / sndbuf_getblksz(bs);
1637 a->fragstotal = sndbuf_getblkcnt(bs);
1638 a->fragsize = sndbuf_getblksz(bs);
1639 CHN_UNLOCK(rdch);
1640 } else
1641 ret = EINVAL;
1642 }
1643 break;
1644
1645 case SNDCTL_DSP_GETOSPACE:
1646 /* return space available in the output queue */
1647 {
1648 audio_buf_info *a = (audio_buf_info *)arg;
1649 if (wrch) {
1650 struct snd_dbuf *bs = wrch->bufsoft;
1651
1652 CHN_LOCK(wrch);
1653 /* XXX abusive DMA update: chn_wrupdate(wrch); */
1654 a->bytes = sndbuf_getfree(bs);
1655 a->fragments = a->bytes / sndbuf_getblksz(bs);
1656 a->fragstotal = sndbuf_getblkcnt(bs);
1657 a->fragsize = sndbuf_getblksz(bs);
1658 CHN_UNLOCK(wrch);
1659 } else
1660 ret = EINVAL;
1661 }
1662 break;
1663
1664 case SNDCTL_DSP_GETIPTR:
1665 {
1666 count_info *a = (count_info *)arg;
1667 if (rdch) {
1668 struct snd_dbuf *bs = rdch->bufsoft;
1669
1670 CHN_LOCK(rdch);
1671 /* XXX abusive DMA update: chn_rdupdate(rdch); */
1672 a->bytes = sndbuf_gettotal(bs);
1673 a->blocks = sndbuf_getblocks(bs) - rdch->blocks;
1674 a->ptr = sndbuf_getfreeptr(bs);
1675 rdch->blocks = sndbuf_getblocks(bs);
1676 CHN_UNLOCK(rdch);
1677 } else
1678 ret = EINVAL;
1679 }
1680 break;
1681
1682 case SNDCTL_DSP_GETOPTR:
1683 {
1684 count_info *a = (count_info *)arg;
1685 if (wrch) {
1686 struct snd_dbuf *bs = wrch->bufsoft;
1687
1688 CHN_LOCK(wrch);
1689 /* XXX abusive DMA update: chn_wrupdate(wrch); */
1690 a->bytes = sndbuf_gettotal(bs);
1691 a->blocks = sndbuf_getblocks(bs) - wrch->blocks;
1692 a->ptr = sndbuf_getreadyptr(bs);
1693 wrch->blocks = sndbuf_getblocks(bs);
1694 CHN_UNLOCK(wrch);
1695 } else
1696 ret = EINVAL;
1697 }
1698 break;
1699
1700 case SNDCTL_DSP_GETCAPS:
1701 PCM_LOCK(d);
1702 *arg_i = PCM_CAP_REALTIME | PCM_CAP_MMAP | PCM_CAP_TRIGGER;
1703 if (rdch && wrch && !(dsp_get_flags(i_dev) & SD_F_SIMPLEX))
1704 *arg_i |= PCM_CAP_DUPLEX;
1705 PCM_UNLOCK(d);
1706 break;
1707
1708 case SOUND_PCM_READ_BITS:
1709 chn = wrch ? wrch : rdch;
1710 if (chn) {
1711 CHN_LOCK(chn);
1712 if (chn->format & AFMT_8BIT)
1713 *arg_i = 8;
1714 else if (chn->format & AFMT_16BIT)
1715 *arg_i = 16;
1716 else if (chn->format & AFMT_24BIT)
1717 *arg_i = 24;
1718 else if (chn->format & AFMT_32BIT)
1719 *arg_i = 32;
1720 else
1721 ret = EINVAL;
1722 CHN_UNLOCK(chn);
1723 } else {
1724 *arg_i = 0;
1725 ret = EINVAL;
1726 }
1727 break;
1728
1729 case SNDCTL_DSP_SETTRIGGER:
1730 if (rdch) {
1731 CHN_LOCK(rdch);
1732 rdch->flags &= ~CHN_F_NOTRIGGER;
1733 if (*arg_i & PCM_ENABLE_INPUT)
1734 chn_start(rdch, 1);
1735 else {
1736 chn_abort(rdch);
1737 chn_resetbuf(rdch);
1738 rdch->flags |= CHN_F_NOTRIGGER;
1739 }
1740 CHN_UNLOCK(rdch);
1741 }
1742 if (wrch) {
1743 CHN_LOCK(wrch);
1744 wrch->flags &= ~CHN_F_NOTRIGGER;
1745 if (*arg_i & PCM_ENABLE_OUTPUT)
1746 chn_start(wrch, 1);
1747 else {
1748 chn_abort(wrch);
1749 chn_resetbuf(wrch);
1750 wrch->flags |= CHN_F_NOTRIGGER;
1751 }
1752 CHN_UNLOCK(wrch);
1753 }
1754 break;
1755
1756 case SNDCTL_DSP_GETTRIGGER:
1757 *arg_i = 0;
1758 if (wrch) {
1759 CHN_LOCK(wrch);
1760 if (wrch->flags & CHN_F_TRIGGERED)
1761 *arg_i |= PCM_ENABLE_OUTPUT;
1762 CHN_UNLOCK(wrch);
1763 }
1764 if (rdch) {
1765 CHN_LOCK(rdch);
1766 if (rdch->flags & CHN_F_TRIGGERED)
1767 *arg_i |= PCM_ENABLE_INPUT;
1768 CHN_UNLOCK(rdch);
1769 }
1770 break;
1771
1772 case SNDCTL_DSP_GETODELAY:
1773 if (wrch) {
1774 struct snd_dbuf *bs = wrch->bufsoft;
1775
1776 CHN_LOCK(wrch);
1777 /* XXX abusive DMA update: chn_wrupdate(wrch); */
1778 *arg_i = sndbuf_getready(bs);
1779 CHN_UNLOCK(wrch);
1780 } else
1781 ret = EINVAL;
1782 break;
1783
1784 case SNDCTL_DSP_POST:
1785 if (wrch) {
1786 CHN_LOCK(wrch);
1787 wrch->flags &= ~CHN_F_NOTRIGGER;
1788 chn_start(wrch, 1);
1789 CHN_UNLOCK(wrch);
1790 }
1791 break;
1792
1793 case SNDCTL_DSP_SETDUPLEX:
1794 /*
1795 * switch to full-duplex mode if card is in half-duplex
1796 * mode and is able to work in full-duplex mode
1797 */
1798 PCM_LOCK(d);
1799 if (rdch && wrch && (dsp_get_flags(i_dev) & SD_F_SIMPLEX))
1800 dsp_set_flags(i_dev, dsp_get_flags(i_dev)^SD_F_SIMPLEX);
1801 PCM_UNLOCK(d);
1802 break;
1803
1804 /*
1805 * The following four ioctls are simple wrappers around mixer_ioctl
1806 * with no further processing. xcmd is short for "translated
1807 * command".
1808 */
1809 case SNDCTL_DSP_GETRECVOL:
1810 if (xcmd == 0) {
1811 xcmd = SOUND_MIXER_READ_RECLEV;
1812 chn = rdch;
1813 }
1814 /* FALLTHROUGH */
1815 case SNDCTL_DSP_SETRECVOL:
1816 if (xcmd == 0) {
1817 xcmd = SOUND_MIXER_WRITE_RECLEV;
1818 chn = rdch;
1819 }
1820 /* FALLTHROUGH */
1821 case SNDCTL_DSP_GETPLAYVOL:
1822 if (xcmd == 0) {
1823 xcmd = SOUND_MIXER_READ_PCM;
1824 chn = wrch;
1825 }
1826 /* FALLTHROUGH */
1827 case SNDCTL_DSP_SETPLAYVOL:
1828 if (xcmd == 0) {
1829 xcmd = SOUND_MIXER_WRITE_PCM;
1830 chn = wrch;
1831 }
1832
1833 ret = dsp_ioctl_channel(i_dev, chn, xcmd, arg);
1834 if (ret != -1) {
1835 PCM_GIANT_EXIT(d);
1836 return (ret);
1837 }
1838
1839 if (d->mixer_dev != NULL) {
1840 PCM_ACQUIRE_QUICK(d);
1841 ret = mixer_ioctl_cmd(d->mixer_dev, xcmd, arg, -1, td,
1842 MIXER_CMD_DIRECT);
1843 PCM_RELEASE_QUICK(d);
1844 } else
1845 ret = ENOTSUP;
1846
1847 break;
1848
1849 case SNDCTL_DSP_GET_RECSRC_NAMES:
1850 case SNDCTL_DSP_GET_RECSRC:
1851 case SNDCTL_DSP_SET_RECSRC:
1852 if (d->mixer_dev != NULL) {
1853 PCM_ACQUIRE_QUICK(d);
1854 ret = mixer_ioctl_cmd(d->mixer_dev, cmd, arg, -1, td,
1855 MIXER_CMD_DIRECT);
1856 PCM_RELEASE_QUICK(d);
1857 } else
1858 ret = ENOTSUP;
1859 break;
1860
1861 /*
1862 * The following 3 ioctls aren't very useful at the moment. For
1863 * now, only a single channel is associated with a cdev (/dev/dspN
1864 * instance), so there's only a single output routing to use (i.e.,
1865 * the wrch bound to this cdev).
1866 */
1867 case SNDCTL_DSP_GET_PLAYTGT_NAMES:
1868 {
1869 oss_mixer_enuminfo *ei;
1870 ei = (oss_mixer_enuminfo *)arg;
1871 ei->dev = 0;
1872 ei->ctrl = 0;
1873 ei->version = 0; /* static for now */
1874 ei->strindex[0] = 0;
1875
1876 if (wrch != NULL) {
1877 ei->nvalues = 1;
1878 strlcpy(ei->strings, wrch->name,
1879 sizeof(ei->strings));
1880 } else {
1881 ei->nvalues = 0;
1882 ei->strings[0] = '\0';
1883 }
1884 }
1885 break;
1886 case SNDCTL_DSP_GET_PLAYTGT:
1887 case SNDCTL_DSP_SET_PLAYTGT: /* yes, they are the same for now */
1888 /*
1889 * Re: SET_PLAYTGT
1890 * OSSv4: "The value that was accepted by the device will
1891 * be returned back in the variable pointed by the
1892 * argument."
1893 */
1894 if (wrch != NULL)
1895 *arg_i = 0;
1896 else
1897 ret = EINVAL;
1898 break;
1899
1900 case SNDCTL_DSP_SILENCE:
1901 /*
1902 * Flush the software (pre-feed) buffer, but try to minimize playback
1903 * interruption. (I.e., record unplayed samples with intent to
1904 * restore by SNDCTL_DSP_SKIP.) Intended for application "pause"
1905 * functionality.
1906 */
1907 if (wrch == NULL)
1908 ret = EINVAL;
1909 else {
1910 struct snd_dbuf *bs;
1911 CHN_LOCK(wrch);
1912 while (wrch->inprog != 0)
1913 cv_wait(&wrch->cv, wrch->lock);
1914 bs = wrch->bufsoft;
1915 if ((bs->shadbuf != NULL) && (sndbuf_getready(bs) > 0)) {
1916 bs->sl = sndbuf_getready(bs);
1917 sndbuf_dispose(bs, bs->shadbuf, sndbuf_getready(bs));
1918 sndbuf_fillsilence(bs);
1919 chn_start(wrch, 0);
1920 }
1921 CHN_UNLOCK(wrch);
1922 }
1923 break;
1924
1925 case SNDCTL_DSP_SKIP:
1926 /*
1927 * OSSv4 docs: "This ioctl call discards all unplayed samples in the
1928 * playback buffer by moving the current write position immediately
1929 * before the point where the device is currently reading the samples."
1930 */
1931 if (wrch == NULL)
1932 ret = EINVAL;
1933 else {
1934 struct snd_dbuf *bs;
1935 CHN_LOCK(wrch);
1936 while (wrch->inprog != 0)
1937 cv_wait(&wrch->cv, wrch->lock);
1938 bs = wrch->bufsoft;
1939 if ((bs->shadbuf != NULL) && (bs->sl > 0)) {
1940 sndbuf_softreset(bs);
1941 sndbuf_acquire(bs, bs->shadbuf, bs->sl);
1942 bs->sl = 0;
1943 chn_start(wrch, 0);
1944 }
1945 CHN_UNLOCK(wrch);
1946 }
1947 break;
1948
1949 case SNDCTL_DSP_CURRENT_OPTR:
1950 case SNDCTL_DSP_CURRENT_IPTR:
1951 /**
1952 * @note Changing formats resets the buffer counters, which differs
1953 * from the 4Front drivers. However, I don't expect this to be
1954 * much of a problem.
1955 *
1956 * @note In a test where @c CURRENT_OPTR is called immediately after write
1957 * returns, this driver is about 32K samples behind whereas
1958 * 4Front's is about 8K samples behind. Should determine source
1959 * of discrepancy, even if only out of curiosity.
1960 *
1961 * @todo Actually test SNDCTL_DSP_CURRENT_IPTR.
1962 */
1963 chn = (cmd == SNDCTL_DSP_CURRENT_OPTR) ? wrch : rdch;
1964 if (chn == NULL)
1965 ret = EINVAL;
1966 else {
1967 struct snd_dbuf *bs;
1968 /* int tmp; */
1969
1970 oss_count_t *oc = (oss_count_t *)arg;
1971
1972 CHN_LOCK(chn);
1973 bs = chn->bufsoft;
1974 #if 0
1975 tmp = (sndbuf_getsize(b) + chn_getptr(chn) - sndbuf_gethwptr(b)) % sndbuf_getsize(b);
1976 oc->samples = (sndbuf_gettotal(b) + tmp) / sndbuf_getalign(b);
1977 oc->fifo_samples = (sndbuf_getready(b) - tmp) / sndbuf_getalign(b);
1978 #else
1979 oc->samples = sndbuf_gettotal(bs) / sndbuf_getalign(bs);
1980 oc->fifo_samples = sndbuf_getready(bs) / sndbuf_getalign(bs);
1981 #endif
1982 CHN_UNLOCK(chn);
1983 }
1984 break;
1985
1986 case SNDCTL_DSP_HALT_OUTPUT:
1987 case SNDCTL_DSP_HALT_INPUT:
1988 chn = (cmd == SNDCTL_DSP_HALT_OUTPUT) ? wrch : rdch;
1989 if (chn == NULL)
1990 ret = EINVAL;
1991 else {
1992 CHN_LOCK(chn);
1993 chn_abort(chn);
1994 CHN_UNLOCK(chn);
1995 }
1996 break;
1997
1998 case SNDCTL_DSP_LOW_WATER:
1999 /*
2000 * Set the number of bytes required to attract attention by
2001 * select/poll.
2002 */
2003 if (wrch != NULL) {
2004 CHN_LOCK(wrch);
2005 wrch->lw = (*arg_i > 1) ? *arg_i : 1;
2006 CHN_UNLOCK(wrch);
2007 }
2008 if (rdch != NULL) {
2009 CHN_LOCK(rdch);
2010 rdch->lw = (*arg_i > 1) ? *arg_i : 1;
2011 CHN_UNLOCK(rdch);
2012 }
2013 break;
2014
2015 case SNDCTL_DSP_GETERROR:
2016 /*
2017 * OSSv4 docs: "All errors and counters will automatically be
2018 * cleared to zeroes after the call so each call will return only
2019 * the errors that occurred after the previous invocation. ... The
2020 * play_underruns and rec_overrun fields are the only useful fields
2021 * returned by OSS 4.0."
2022 */
2023 {
2024 audio_errinfo *ei = (audio_errinfo *)arg;
2025
2026 bzero((void *)ei, sizeof(*ei));
2027
2028 if (wrch != NULL) {
2029 CHN_LOCK(wrch);
2030 ei->play_underruns = wrch->xruns;
2031 wrch->xruns = 0;
2032 CHN_UNLOCK(wrch);
2033 }
2034 if (rdch != NULL) {
2035 CHN_LOCK(rdch);
2036 ei->rec_overruns = rdch->xruns;
2037 rdch->xruns = 0;
2038 CHN_UNLOCK(rdch);
2039 }
2040 }
2041 break;
2042
2043 case SNDCTL_DSP_SYNCGROUP:
2044 PCM_ACQUIRE_QUICK(d);
2045 ret = dsp_oss_syncgroup(wrch, rdch, (oss_syncgroup *)arg);
2046 PCM_RELEASE_QUICK(d);
2047 break;
2048
2049 case SNDCTL_DSP_SYNCSTART:
2050 PCM_ACQUIRE_QUICK(d);
2051 ret = dsp_oss_syncstart(*arg_i);
2052 PCM_RELEASE_QUICK(d);
2053 break;
2054
2055 case SNDCTL_DSP_POLICY:
2056 PCM_ACQUIRE_QUICK(d);
2057 ret = dsp_oss_policy(wrch, rdch, *arg_i);
2058 PCM_RELEASE_QUICK(d);
2059 break;
2060
2061 case SNDCTL_DSP_COOKEDMODE:
2062 PCM_ACQUIRE_QUICK(d);
2063 if (!(dsp_get_flags(i_dev) & SD_F_BITPERFECT))
2064 ret = dsp_oss_cookedmode(wrch, rdch, *arg_i);
2065 PCM_RELEASE_QUICK(d);
2066 break;
2067 case SNDCTL_DSP_GET_CHNORDER:
2068 PCM_ACQUIRE_QUICK(d);
2069 ret = dsp_oss_getchnorder(wrch, rdch, (unsigned long long *)arg);
2070 PCM_RELEASE_QUICK(d);
2071 break;
2072 case SNDCTL_DSP_SET_CHNORDER:
2073 PCM_ACQUIRE_QUICK(d);
2074 ret = dsp_oss_setchnorder(wrch, rdch, (unsigned long long *)arg);
2075 PCM_RELEASE_QUICK(d);
2076 break;
2077 case SNDCTL_DSP_GETCHANNELMASK: /* XXX vlc */
2078 PCM_ACQUIRE_QUICK(d);
2079 ret = dsp_oss_getchannelmask(wrch, rdch, (int *)arg);
2080 PCM_RELEASE_QUICK(d);
2081 break;
2082 case SNDCTL_DSP_BIND_CHANNEL: /* XXX what?!? */
2083 ret = EINVAL;
2084 break;
2085 #ifdef OSSV4_EXPERIMENT
2086 /*
2087 * XXX The following ioctls are not yet supported and just return
2088 * EINVAL.
2089 */
2090 case SNDCTL_DSP_GETOPEAKS:
2091 case SNDCTL_DSP_GETIPEAKS:
2092 chn = (cmd == SNDCTL_DSP_GETOPEAKS) ? wrch : rdch;
2093 if (chn == NULL)
2094 ret = EINVAL;
2095 else {
2096 oss_peaks_t *op = (oss_peaks_t *)arg;
2097 int lpeak, rpeak;
2098
2099 CHN_LOCK(chn);
2100 ret = chn_getpeaks(chn, &lpeak, &rpeak);
2101 if (ret == -1)
2102 ret = EINVAL;
2103 else {
2104 (*op)[0] = lpeak;
2105 (*op)[1] = rpeak;
2106 }
2107 CHN_UNLOCK(chn);
2108 }
2109 break;
2110
2111 /*
2112 * XXX Once implemented, revisit this for proper cv protection
2113 * (if necessary).
2114 */
2115 case SNDCTL_GETLABEL:
2116 ret = dsp_oss_getlabel(wrch, rdch, (oss_label_t *)arg);
2117 break;
2118 case SNDCTL_SETLABEL:
2119 ret = dsp_oss_setlabel(wrch, rdch, (oss_label_t *)arg);
2120 break;
2121 case SNDCTL_GETSONG:
2122 ret = dsp_oss_getsong(wrch, rdch, (oss_longname_t *)arg);
2123 break;
2124 case SNDCTL_SETSONG:
2125 ret = dsp_oss_setsong(wrch, rdch, (oss_longname_t *)arg);
2126 break;
2127 case SNDCTL_SETNAME:
2128 ret = dsp_oss_setname(wrch, rdch, (oss_longname_t *)arg);
2129 break;
2130 #if 0
2131 /**
2132 * @note The S/PDIF interface ioctls, @c SNDCTL_DSP_READCTL and
2133 * @c SNDCTL_DSP_WRITECTL have been omitted at the suggestion of
2134 * 4Front Technologies.
2135 */
2136 case SNDCTL_DSP_READCTL:
2137 case SNDCTL_DSP_WRITECTL:
2138 ret = EINVAL;
2139 break;
2140 #endif /* !0 (explicitly omitted ioctls) */
2141
2142 #endif /* !OSSV4_EXPERIMENT */
2143 case SNDCTL_DSP_MAPINBUF:
2144 case SNDCTL_DSP_MAPOUTBUF:
2145 case SNDCTL_DSP_SETSYNCRO:
2146 /* undocumented */
2147
2148 case SNDCTL_DSP_SUBDIVIDE:
2149 case SOUND_PCM_WRITE_FILTER:
2150 case SOUND_PCM_READ_FILTER:
2151 /* dunno what these do, don't sound important */
2152
2153 default:
2154 DEB(printf("default ioctl fn 0x%08lx fail\n", cmd));
2155 ret = EINVAL;
2156 break;
2157 }
2158
2159 PCM_GIANT_LEAVE(d);
2160
2161 return (ret);
2162 }
2163
2164 static int
dsp_poll(struct cdev * i_dev,int events,struct thread * td)2165 dsp_poll(struct cdev *i_dev, int events, struct thread *td)
2166 {
2167 struct snddev_info *d;
2168 struct pcm_channel *wrch, *rdch;
2169 int ret, e;
2170
2171 d = dsp_get_info(i_dev);
2172 if (!DSP_REGISTERED(d, i_dev))
2173 return (EBADF);
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
dsp_mmap(struct cdev * i_dev,vm_ooffset_t offset,vm_paddr_t * paddr,int nprot,vm_memattr_t * memattr)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
dsp_mmap_single(struct cdev * i_dev,vm_ooffset_t * offset,vm_size_t size,struct vm_object ** object,int nprot)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 (!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
dsp_stdclone(char * name,char * namep,char * sep,int use_sep,int * u,int * c)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 == '0' && !(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 - '0';
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 == '0' && name[1] != '\0')
2316 return (ENODEV);
2317
2318 for (*c = 0; isdigit(*name) != 0; name++) {
2319 *c *= 10;
2320 *c += *name - '0';
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
dsp_clone(void * arg,struct ucred * cred,char * name,int namelen,struct cdev ** dev)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
dsp_sysinit(void * p)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
dsp_sysuninit(void * p)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 *
dsp_unit2name(char * buf,size_t len,int unit)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
dsp_oss_audioinfo(struct cdev * i_dev,oss_audioinfo * ai)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
dsp_oss_syncgroup(struct pcm_channel * wrch,struct pcm_channel * rdch,oss_syncgroup * group)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
dsp_oss_syncstart(int sg_id)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
dsp_oss_policy(struct pcm_channel * wrch,struct pcm_channel * rdch,int policy)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
dsp_oss_cookedmode(struct pcm_channel * wrch,struct pcm_channel * rdch,int enabled)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
dsp_oss_getchnorder(struct pcm_channel * wrch,struct pcm_channel * rdch,unsigned long long * map)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
dsp_oss_setchnorder(struct pcm_channel * wrch,struct pcm_channel * rdch,unsigned long long * map)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
dsp_oss_getchannelmask(struct pcm_channel * wrch,struct pcm_channel * rdch,int * mask)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
dsp_oss_getlabel(struct pcm_channel * wrch,struct pcm_channel * rdch,oss_label_t * label)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
dsp_oss_setlabel(struct pcm_channel * wrch,struct pcm_channel * rdch,oss_label_t * label)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
dsp_oss_getsong(struct pcm_channel * wrch,struct pcm_channel * rdch,oss_longname_t * song)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
dsp_oss_setsong(struct pcm_channel * wrch,struct pcm_channel * rdch,oss_longname_t * song)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
dsp_oss_setname(struct pcm_channel * wrch,struct pcm_channel * rdch,oss_longname_t * name)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 */
3371