1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2005-2009 Ariff Abdullah <ariff@FreeBSD.org>
5 * Portions Copyright (c) Ryan Beasley <ryan.beasley@gmail.com> - GSoC 2006
6 * Copyright (c) 1999 Cameron Grant <cg@FreeBSD.org>
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
31 #ifdef HAVE_KERNEL_OPTION_HEADERS
32 #include "opt_snd.h"
33 #endif
34
35 #include <dev/sound/pcm/sound.h>
36 #include <sys/ctype.h>
37 #include <sys/lock.h>
38 #include <sys/rwlock.h>
39 #include <sys/sysent.h>
40
41 #include <vm/vm.h>
42 #include <vm/vm_object.h>
43 #include <vm/vm_page.h>
44 #include <vm/vm_pager.h>
45
46 SND_DECLARE_FILE("$FreeBSD: stable/12/sys/dev/sound/pcm/dsp.c 369534 2021-03-31 13:23:04Z markj $");
47
48 static int dsp_mmap_allow_prot_exec = 0;
49 SYSCTL_INT(_hw_snd, OID_AUTO, compat_linux_mmap, CTLFLAG_RWTUN,
50 &dsp_mmap_allow_prot_exec, 0,
51 "linux mmap compatibility (-1=force disable 0=auto 1=force enable)");
52
53 static int dsp_basename_clone = 1;
54 SYSCTL_INT(_hw_snd, OID_AUTO, basename_clone, CTLFLAG_RWTUN,
55 &dsp_basename_clone, 0,
56 "DSP basename cloning (0: Disable; 1: Enabled)");
57
58 struct dsp_cdevinfo {
59 struct pcm_channel *rdch, *wrch;
60 struct pcm_channel *volch;
61 int busy, simplex;
62 TAILQ_ENTRY(dsp_cdevinfo) link;
63 };
64
65 #define PCM_RDCH(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->rdch)
66 #define PCM_WRCH(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->wrch)
67 #define PCM_VOLCH(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->volch)
68 #define PCM_SIMPLEX(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->simplex)
69
70 #define DSP_CDEVINFO_CACHESIZE 8
71
72 #define DSP_REGISTERED(x, y) (PCM_REGISTERED(x) && \
73 (y) != NULL && (y)->si_drv1 != NULL)
74
75 #define OLDPCM_IOCTL
76
77 static d_open_t dsp_open;
78 static d_close_t dsp_close;
79 static d_read_t dsp_read;
80 static d_write_t dsp_write;
81 static d_ioctl_t dsp_ioctl;
82 static d_poll_t dsp_poll;
83 static d_mmap_t dsp_mmap;
84 static d_mmap_single_t dsp_mmap_single;
85
86 struct cdevsw dsp_cdevsw = {
87 .d_version = D_VERSION,
88 .d_open = dsp_open,
89 .d_close = dsp_close,
90 .d_read = dsp_read,
91 .d_write = dsp_write,
92 .d_ioctl = dsp_ioctl,
93 .d_poll = dsp_poll,
94 .d_mmap = dsp_mmap,
95 .d_mmap_single = dsp_mmap_single,
96 .d_name = "dsp",
97 };
98
99 static eventhandler_tag dsp_ehtag = NULL;
100 static int dsp_umax = -1;
101 static int dsp_cmax = -1;
102
103 static int dsp_oss_syncgroup(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_syncgroup *group);
104 static int dsp_oss_syncstart(int sg_id);
105 static int dsp_oss_policy(struct pcm_channel *wrch, struct pcm_channel *rdch, int policy);
106 static int dsp_oss_cookedmode(struct pcm_channel *wrch, struct pcm_channel *rdch, int enabled);
107 static int dsp_oss_getchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map);
108 static int dsp_oss_setchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map);
109 static int dsp_oss_getchannelmask(struct pcm_channel *wrch, struct pcm_channel *rdch, int *mask);
110 #ifdef OSSV4_EXPERIMENT
111 static int dsp_oss_getlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label);
112 static int dsp_oss_setlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label);
113 static int dsp_oss_getsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song);
114 static int dsp_oss_setsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song);
115 static int dsp_oss_setname(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *name);
116 #endif
117
118 static struct snddev_info *
dsp_get_info(struct cdev * dev)119 dsp_get_info(struct cdev *dev)
120 {
121 return (devclass_get_softc(pcm_devclass, PCMUNIT(dev)));
122 }
123
124 static uint32_t
dsp_get_flags(struct cdev * dev)125 dsp_get_flags(struct cdev *dev)
126 {
127 device_t bdev;
128
129 bdev = devclass_get_device(pcm_devclass, PCMUNIT(dev));
130
131 return ((bdev != NULL) ? pcm_getflags(bdev) : 0xffffffff);
132 }
133
134 static void
dsp_set_flags(struct cdev * dev,uint32_t flags)135 dsp_set_flags(struct cdev *dev, uint32_t flags)
136 {
137 device_t bdev;
138
139 bdev = devclass_get_device(pcm_devclass, PCMUNIT(dev));
140
141 if (bdev != NULL)
142 pcm_setflags(bdev, flags);
143 }
144
145 /*
146 * return the channels associated with an open device instance.
147 * lock channels specified.
148 */
149 static int
getchns(struct cdev * dev,struct pcm_channel ** rdch,struct pcm_channel ** wrch,uint32_t prio)150 getchns(struct cdev *dev, struct pcm_channel **rdch, struct pcm_channel **wrch,
151 uint32_t prio)
152 {
153 struct snddev_info *d;
154 struct pcm_channel *ch;
155 uint32_t flags;
156
157 if (PCM_SIMPLEX(dev) != 0) {
158 d = dsp_get_info(dev);
159 if (!PCM_REGISTERED(d))
160 return (ENXIO);
161 PCM_LOCK(d);
162 PCM_WAIT(d);
163 PCM_ACQUIRE(d);
164 /*
165 * Note: order is important -
166 * pcm flags -> prio query flags -> wild guess
167 */
168 ch = NULL;
169 flags = dsp_get_flags(dev);
170 if (flags & SD_F_PRIO_WR) {
171 ch = PCM_RDCH(dev);
172 PCM_RDCH(dev) = NULL;
173 } else if (flags & SD_F_PRIO_RD) {
174 ch = PCM_WRCH(dev);
175 PCM_WRCH(dev) = NULL;
176 } else if (prio & SD_F_PRIO_WR) {
177 ch = PCM_RDCH(dev);
178 PCM_RDCH(dev) = NULL;
179 flags |= SD_F_PRIO_WR;
180 } else if (prio & SD_F_PRIO_RD) {
181 ch = PCM_WRCH(dev);
182 PCM_WRCH(dev) = NULL;
183 flags |= SD_F_PRIO_RD;
184 } else if (PCM_WRCH(dev) != NULL) {
185 ch = PCM_RDCH(dev);
186 PCM_RDCH(dev) = NULL;
187 flags |= SD_F_PRIO_WR;
188 } else if (PCM_RDCH(dev) != NULL) {
189 ch = PCM_WRCH(dev);
190 PCM_WRCH(dev) = NULL;
191 flags |= SD_F_PRIO_RD;
192 }
193 PCM_SIMPLEX(dev) = 0;
194 dsp_set_flags(dev, flags);
195 if (ch != NULL) {
196 CHN_LOCK(ch);
197 pcm_chnref(ch, -1);
198 pcm_chnrelease(ch);
199 }
200 PCM_RELEASE(d);
201 PCM_UNLOCK(d);
202 }
203
204 *rdch = PCM_RDCH(dev);
205 *wrch = PCM_WRCH(dev);
206
207 if (*rdch != NULL && (prio & SD_F_PRIO_RD))
208 CHN_LOCK(*rdch);
209 if (*wrch != NULL && (prio & SD_F_PRIO_WR))
210 CHN_LOCK(*wrch);
211
212 return (0);
213 }
214
215 /* unlock specified channels */
216 static void
relchns(struct cdev * dev,struct pcm_channel * rdch,struct pcm_channel * wrch,uint32_t prio)217 relchns(struct cdev *dev, struct pcm_channel *rdch, struct pcm_channel *wrch,
218 uint32_t prio)
219 {
220 if (wrch != NULL && (prio & SD_F_PRIO_WR))
221 CHN_UNLOCK(wrch);
222 if (rdch != NULL && (prio & SD_F_PRIO_RD))
223 CHN_UNLOCK(rdch);
224 }
225
226 static void
dsp_cdevinfo_alloc(struct cdev * dev,struct pcm_channel * rdch,struct pcm_channel * wrch,struct pcm_channel * volch)227 dsp_cdevinfo_alloc(struct cdev *dev,
228 struct pcm_channel *rdch, struct pcm_channel *wrch,
229 struct pcm_channel *volch)
230 {
231 struct snddev_info *d;
232 struct dsp_cdevinfo *cdi;
233 int simplex;
234
235 d = dsp_get_info(dev);
236
237 KASSERT(PCM_REGISTERED(d) && dev != NULL && dev->si_drv1 == NULL &&
238 ((rdch == NULL && wrch == NULL) || rdch != wrch),
239 ("bogus %s(), what are you trying to accomplish here?", __func__));
240 PCM_BUSYASSERT(d);
241 PCM_LOCKASSERT(d);
242
243 simplex = (dsp_get_flags(dev) & SD_F_SIMPLEX) ? 1 : 0;
244
245 /*
246 * Scan for free instance entry and put it into the end of list.
247 * Create new one if necessary.
248 */
249 TAILQ_FOREACH(cdi, &d->dsp_cdevinfo_pool, link) {
250 if (cdi->busy != 0)
251 break;
252 cdi->rdch = rdch;
253 cdi->wrch = wrch;
254 cdi->volch = volch;
255 cdi->simplex = simplex;
256 cdi->busy = 1;
257 TAILQ_REMOVE(&d->dsp_cdevinfo_pool, cdi, link);
258 TAILQ_INSERT_TAIL(&d->dsp_cdevinfo_pool, cdi, link);
259 dev->si_drv1 = cdi;
260 return;
261 }
262 PCM_UNLOCK(d);
263 cdi = malloc(sizeof(*cdi), M_DEVBUF, M_WAITOK | M_ZERO);
264 PCM_LOCK(d);
265 cdi->rdch = rdch;
266 cdi->wrch = wrch;
267 cdi->volch = volch;
268 cdi->simplex = simplex;
269 cdi->busy = 1;
270 TAILQ_INSERT_TAIL(&d->dsp_cdevinfo_pool, cdi, link);
271 dev->si_drv1 = cdi;
272 }
273
274 static void
dsp_cdevinfo_free(struct cdev * dev)275 dsp_cdevinfo_free(struct cdev *dev)
276 {
277 struct snddev_info *d;
278 struct dsp_cdevinfo *cdi, *tmp;
279 uint32_t flags;
280 int i;
281
282 d = dsp_get_info(dev);
283
284 KASSERT(PCM_REGISTERED(d) && dev != NULL && dev->si_drv1 != NULL &&
285 PCM_RDCH(dev) == NULL && PCM_WRCH(dev) == NULL &&
286 PCM_VOLCH(dev) == NULL,
287 ("bogus %s(), what are you trying to accomplish here?", __func__));
288 PCM_BUSYASSERT(d);
289 PCM_LOCKASSERT(d);
290
291 cdi = dev->si_drv1;
292 dev->si_drv1 = NULL;
293 cdi->rdch = NULL;
294 cdi->wrch = NULL;
295 cdi->volch = NULL;
296 cdi->simplex = 0;
297 cdi->busy = 0;
298
299 /*
300 * Once it is free, move it back to the beginning of list for
301 * faster new entry allocation.
302 */
303 TAILQ_REMOVE(&d->dsp_cdevinfo_pool, cdi, link);
304 TAILQ_INSERT_HEAD(&d->dsp_cdevinfo_pool, cdi, link);
305
306 /*
307 * Scan the list, cache free entries up to DSP_CDEVINFO_CACHESIZE.
308 * Reset simplex flags.
309 */
310 flags = dsp_get_flags(dev) & ~SD_F_PRIO_SET;
311 i = DSP_CDEVINFO_CACHESIZE;
312 TAILQ_FOREACH_SAFE(cdi, &d->dsp_cdevinfo_pool, link, tmp) {
313 if (cdi->busy != 0) {
314 if (cdi->simplex == 0) {
315 if (cdi->rdch != NULL)
316 flags |= SD_F_PRIO_RD;
317 if (cdi->wrch != NULL)
318 flags |= SD_F_PRIO_WR;
319 }
320 } else {
321 if (i == 0) {
322 TAILQ_REMOVE(&d->dsp_cdevinfo_pool, cdi, link);
323 free(cdi, M_DEVBUF);
324 } else
325 i--;
326 }
327 }
328 dsp_set_flags(dev, flags);
329 }
330
331 void
dsp_cdevinfo_init(struct snddev_info * d)332 dsp_cdevinfo_init(struct snddev_info *d)
333 {
334 struct dsp_cdevinfo *cdi;
335 int i;
336
337 KASSERT(d != NULL, ("NULL snddev_info"));
338 PCM_BUSYASSERT(d);
339 PCM_UNLOCKASSERT(d);
340
341 TAILQ_INIT(&d->dsp_cdevinfo_pool);
342 for (i = 0; i < DSP_CDEVINFO_CACHESIZE; i++) {
343 cdi = malloc(sizeof(*cdi), M_DEVBUF, M_WAITOK | M_ZERO);
344 TAILQ_INSERT_HEAD(&d->dsp_cdevinfo_pool, cdi, link);
345 }
346 }
347
348 void
dsp_cdevinfo_flush(struct snddev_info * d)349 dsp_cdevinfo_flush(struct snddev_info *d)
350 {
351 struct dsp_cdevinfo *cdi, *tmp;
352
353 KASSERT(d != NULL, ("NULL snddev_info"));
354 PCM_BUSYASSERT(d);
355 PCM_UNLOCKASSERT(d);
356
357 cdi = TAILQ_FIRST(&d->dsp_cdevinfo_pool);
358 while (cdi != NULL) {
359 tmp = TAILQ_NEXT(cdi, link);
360 free(cdi, M_DEVBUF);
361 cdi = tmp;
362 }
363 TAILQ_INIT(&d->dsp_cdevinfo_pool);
364 }
365
366 /* duplex / simplex cdev type */
367 enum {
368 DSP_CDEV_TYPE_RDONLY, /* simplex read-only (record) */
369 DSP_CDEV_TYPE_WRONLY, /* simplex write-only (play) */
370 DSP_CDEV_TYPE_RDWR /* duplex read, write, or both */
371 };
372
373 enum {
374 DSP_CDEV_VOLCTL_NONE,
375 DSP_CDEV_VOLCTL_READ,
376 DSP_CDEV_VOLCTL_WRITE
377 };
378
379 #define DSP_F_VALID(x) ((x) & (FREAD | FWRITE))
380 #define DSP_F_DUPLEX(x) (((x) & (FREAD | FWRITE)) == (FREAD | FWRITE))
381 #define DSP_F_SIMPLEX(x) (!DSP_F_DUPLEX(x))
382 #define DSP_F_READ(x) ((x) & FREAD)
383 #define DSP_F_WRITE(x) ((x) & FWRITE)
384
385 static const struct {
386 int type;
387 char *name;
388 char *sep;
389 char *alias;
390 int use_sep;
391 int hw;
392 int max;
393 int volctl;
394 uint32_t fmt, spd;
395 int query;
396 } dsp_cdevs[] = {
397 { SND_DEV_DSP, "dsp", ".", NULL, 0, 0, 0, 0,
398 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
399 DSP_CDEV_TYPE_RDWR },
400 { SND_DEV_AUDIO, "audio", ".", NULL, 0, 0, 0, 0,
401 SND_FORMAT(AFMT_MU_LAW, 1, 0), DSP_DEFAULT_SPEED,
402 DSP_CDEV_TYPE_RDWR },
403 { SND_DEV_DSP16, "dspW", ".", NULL, 0, 0, 0, 0,
404 SND_FORMAT(AFMT_S16_LE, 1, 0), DSP_DEFAULT_SPEED,
405 DSP_CDEV_TYPE_RDWR },
406 { SND_DEV_DSPHW_PLAY, "dsp", ".p", NULL, 1, 1, SND_MAXHWCHAN, 1,
407 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_WRONLY },
408 { SND_DEV_DSPHW_VPLAY, "dsp", ".vp", NULL, 1, 1, SND_MAXVCHANS, 1,
409 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_WRONLY },
410 { SND_DEV_DSPHW_REC, "dsp", ".r", NULL, 1, 1, SND_MAXHWCHAN, 1,
411 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_RDONLY },
412 { SND_DEV_DSPHW_VREC, "dsp", ".vr", NULL, 1, 1, SND_MAXVCHANS, 1,
413 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_RDONLY },
414 { SND_DEV_DSPHW_CD, "dspcd", ".", NULL, 0, 0, 0, 0,
415 SND_FORMAT(AFMT_S16_LE, 2, 0), 44100, DSP_CDEV_TYPE_RDWR },
416 /* Low priority, OSSv4 aliases. */
417 { SND_DEV_DSP, "dsp_ac3", ".", "dsp", 0, 0, 0, 0,
418 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
419 DSP_CDEV_TYPE_RDWR },
420 { SND_DEV_DSP, "dsp_mmap", ".", "dsp", 0, 0, 0, 0,
421 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
422 DSP_CDEV_TYPE_RDWR },
423 { SND_DEV_DSP, "dsp_multich", ".", "dsp", 0, 0, 0, 0,
424 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
425 DSP_CDEV_TYPE_RDWR },
426 { SND_DEV_DSP, "dsp_spdifout", ".", "dsp", 0, 0, 0, 0,
427 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
428 DSP_CDEV_TYPE_RDWR },
429 { SND_DEV_DSP, "dsp_spdifin", ".", "dsp", 0, 0, 0, 0,
430 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
431 DSP_CDEV_TYPE_RDWR },
432 };
433
434 #define DSP_FIXUP_ERROR() do { \
435 prio = dsp_get_flags(i_dev); \
436 if (!DSP_F_VALID(flags)) \
437 error = EINVAL; \
438 if (!DSP_F_DUPLEX(flags) && \
439 ((DSP_F_READ(flags) && d->reccount == 0) || \
440 (DSP_F_WRITE(flags) && d->playcount == 0))) \
441 error = ENOTSUP; \
442 else if (!DSP_F_DUPLEX(flags) && (prio & SD_F_SIMPLEX) && \
443 ((DSP_F_READ(flags) && (prio & SD_F_PRIO_WR)) || \
444 (DSP_F_WRITE(flags) && (prio & SD_F_PRIO_RD)))) \
445 error = EBUSY; \
446 else if (DSP_REGISTERED(d, i_dev)) \
447 error = EBUSY; \
448 } while (0)
449
450 static int
dsp_open(struct cdev * i_dev,int flags,int mode,struct thread * td)451 dsp_open(struct cdev *i_dev, int flags, int mode, struct thread *td)
452 {
453 struct pcm_channel *rdch, *wrch;
454 struct snddev_info *d;
455 uint32_t fmt, spd, prio, volctl;
456 int i, error, rderror, wrerror, devtype, wdevunit, rdevunit;
457
458 /* Kind of impossible.. */
459 if (i_dev == NULL || td == NULL)
460 return (ENODEV);
461
462 d = dsp_get_info(i_dev);
463 if (PCM_DETACHING(d) || !PCM_REGISTERED(d))
464 return (EBADF);
465
466 PCM_GIANT_ENTER(d);
467
468 /* Lock snddev so nobody else can monkey with it. */
469 PCM_LOCK(d);
470 PCM_WAIT(d);
471
472 /*
473 * Try to acquire cloned device before someone else pick it.
474 * ENODEV means this is not a cloned droids.
475 */
476 error = snd_clone_acquire(i_dev);
477 if (!(error == 0 || error == ENODEV)) {
478 DSP_FIXUP_ERROR();
479 PCM_UNLOCK(d);
480 PCM_GIANT_EXIT(d);
481 return (error);
482 }
483
484 error = 0;
485 DSP_FIXUP_ERROR();
486
487 if (error != 0) {
488 (void)snd_clone_release(i_dev);
489 PCM_UNLOCK(d);
490 PCM_GIANT_EXIT(d);
491 return (error);
492 }
493
494 /*
495 * That is just enough. Acquire and unlock pcm lock so
496 * the other will just have to wait until we finish doing
497 * everything.
498 */
499 PCM_ACQUIRE(d);
500 PCM_UNLOCK(d);
501
502 devtype = PCMDEV(i_dev);
503 wdevunit = -1;
504 rdevunit = -1;
505 fmt = 0;
506 spd = 0;
507 volctl = DSP_CDEV_VOLCTL_NONE;
508
509 for (i = 0; i < (sizeof(dsp_cdevs) / sizeof(dsp_cdevs[0])); i++) {
510 if (devtype != dsp_cdevs[i].type || dsp_cdevs[i].alias != NULL)
511 continue;
512 /*
513 * Volume control only valid for DSPHW devices,
514 * and it must be opened in opposite direction be it
515 * simplex or duplex. Anything else will be handled
516 * as usual.
517 */
518 if (dsp_cdevs[i].query == DSP_CDEV_TYPE_WRONLY) {
519 if (dsp_cdevs[i].volctl != 0 &&
520 DSP_F_READ(flags)) {
521 volctl = DSP_CDEV_VOLCTL_WRITE;
522 flags &= ~FREAD;
523 flags |= FWRITE;
524 }
525 if (DSP_F_READ(flags)) {
526 (void)snd_clone_release(i_dev);
527 PCM_RELEASE_QUICK(d);
528 PCM_GIANT_EXIT(d);
529 return (ENOTSUP);
530 }
531 wdevunit = dev2unit(i_dev);
532 } else if (dsp_cdevs[i].query == DSP_CDEV_TYPE_RDONLY) {
533 if (dsp_cdevs[i].volctl != 0 &&
534 DSP_F_WRITE(flags)) {
535 volctl = DSP_CDEV_VOLCTL_READ;
536 flags &= ~FWRITE;
537 flags |= FREAD;
538 }
539 if (DSP_F_WRITE(flags)) {
540 (void)snd_clone_release(i_dev);
541 PCM_RELEASE_QUICK(d);
542 PCM_GIANT_EXIT(d);
543 return (ENOTSUP);
544 }
545 rdevunit = dev2unit(i_dev);
546 }
547 fmt = dsp_cdevs[i].fmt;
548 spd = dsp_cdevs[i].spd;
549 break;
550 }
551
552 /* No matching devtype? */
553 if (fmt == 0 || spd == 0)
554 panic("impossible devtype %d", devtype);
555
556 rdch = NULL;
557 wrch = NULL;
558 rderror = 0;
559 wrerror = 0;
560
561 /*
562 * if we get here, the open request is valid- either:
563 * * we were previously not open
564 * * we were open for play xor record and the opener wants
565 * the non-open direction
566 */
567 if (DSP_F_READ(flags)) {
568 /* open for read */
569 rderror = pcm_chnalloc(d, &rdch, PCMDIR_REC,
570 td->td_proc->p_pid, td->td_proc->p_comm, rdevunit);
571
572 if (rderror == 0 && chn_reset(rdch, fmt, spd) != 0)
573 rderror = ENXIO;
574
575 if (volctl == DSP_CDEV_VOLCTL_READ)
576 rderror = 0;
577
578 if (rderror != 0) {
579 if (rdch != NULL)
580 pcm_chnrelease(rdch);
581 if (!DSP_F_DUPLEX(flags)) {
582 (void)snd_clone_release(i_dev);
583 PCM_RELEASE_QUICK(d);
584 PCM_GIANT_EXIT(d);
585 return (rderror);
586 }
587 rdch = NULL;
588 } else if (volctl == DSP_CDEV_VOLCTL_READ) {
589 if (rdch != NULL) {
590 pcm_chnref(rdch, 1);
591 pcm_chnrelease(rdch);
592 }
593 } else {
594 if (flags & O_NONBLOCK)
595 rdch->flags |= CHN_F_NBIO;
596 if (flags & O_EXCL)
597 rdch->flags |= CHN_F_EXCLUSIVE;
598 pcm_chnref(rdch, 1);
599 if (volctl == DSP_CDEV_VOLCTL_NONE)
600 chn_vpc_reset(rdch, SND_VOL_C_PCM, 0);
601 CHN_UNLOCK(rdch);
602 }
603 }
604
605 if (DSP_F_WRITE(flags)) {
606 /* open for write */
607 wrerror = pcm_chnalloc(d, &wrch, PCMDIR_PLAY,
608 td->td_proc->p_pid, td->td_proc->p_comm, wdevunit);
609
610 if (wrerror == 0 && chn_reset(wrch, fmt, spd) != 0)
611 wrerror = ENXIO;
612
613 if (volctl == DSP_CDEV_VOLCTL_WRITE)
614 wrerror = 0;
615
616 if (wrerror != 0) {
617 if (wrch != NULL)
618 pcm_chnrelease(wrch);
619 if (!DSP_F_DUPLEX(flags)) {
620 if (rdch != NULL) {
621 /*
622 * Lock, deref and release previously
623 * created record channel
624 */
625 CHN_LOCK(rdch);
626 pcm_chnref(rdch, -1);
627 pcm_chnrelease(rdch);
628 }
629 (void)snd_clone_release(i_dev);
630 PCM_RELEASE_QUICK(d);
631 PCM_GIANT_EXIT(d);
632 return (wrerror);
633 }
634 wrch = NULL;
635 } else if (volctl == DSP_CDEV_VOLCTL_WRITE) {
636 if (wrch != NULL) {
637 pcm_chnref(wrch, 1);
638 pcm_chnrelease(wrch);
639 }
640 } else {
641 if (flags & O_NONBLOCK)
642 wrch->flags |= CHN_F_NBIO;
643 if (flags & O_EXCL)
644 wrch->flags |= CHN_F_EXCLUSIVE;
645 pcm_chnref(wrch, 1);
646 if (volctl == DSP_CDEV_VOLCTL_NONE)
647 chn_vpc_reset(wrch, SND_VOL_C_PCM, 0);
648 CHN_UNLOCK(wrch);
649 }
650 }
651
652
653 PCM_LOCK(d);
654
655 /*
656 * We're done. Allocate channels information for this cdev.
657 */
658 switch (volctl) {
659 case DSP_CDEV_VOLCTL_READ:
660 KASSERT(wrch == NULL, ("wrch=%p not null!", wrch));
661 dsp_cdevinfo_alloc(i_dev, NULL, NULL, rdch);
662 break;
663 case DSP_CDEV_VOLCTL_WRITE:
664 KASSERT(rdch == NULL, ("rdch=%p not null!", rdch));
665 dsp_cdevinfo_alloc(i_dev, NULL, NULL, wrch);
666 break;
667 case DSP_CDEV_VOLCTL_NONE:
668 default:
669 if (wrch == NULL && rdch == NULL) {
670 (void)snd_clone_release(i_dev);
671 PCM_RELEASE(d);
672 PCM_UNLOCK(d);
673 PCM_GIANT_EXIT(d);
674 if (wrerror != 0)
675 return (wrerror);
676 if (rderror != 0)
677 return (rderror);
678 return (EINVAL);
679 }
680 dsp_cdevinfo_alloc(i_dev, rdch, wrch, NULL);
681 if (rdch != NULL)
682 CHN_INSERT_HEAD(d, rdch, channels.pcm.opened);
683 if (wrch != NULL)
684 CHN_INSERT_HEAD(d, wrch, channels.pcm.opened);
685 break;
686 }
687
688 /*
689 * Increase clone refcount for its automatic garbage collector.
690 */
691 (void)snd_clone_ref(i_dev);
692
693 PCM_RELEASE(d);
694 PCM_UNLOCK(d);
695
696 PCM_GIANT_LEAVE(d);
697
698 return (0);
699 }
700
701 static int
dsp_close(struct cdev * i_dev,int flags,int mode,struct thread * td)702 dsp_close(struct cdev *i_dev, int flags, int mode, struct thread *td)
703 {
704 struct pcm_channel *rdch, *wrch, *volch;
705 struct snddev_info *d;
706 int sg_ids, rdref, wdref;
707
708 d = dsp_get_info(i_dev);
709 if (!DSP_REGISTERED(d, i_dev))
710 return (EBADF);
711
712 PCM_GIANT_ENTER(d);
713
714 PCM_LOCK(d);
715 PCM_WAIT(d);
716 PCM_ACQUIRE(d);
717
718 rdch = PCM_RDCH(i_dev);
719 wrch = PCM_WRCH(i_dev);
720 volch = PCM_VOLCH(i_dev);
721
722 PCM_RDCH(i_dev) = NULL;
723 PCM_WRCH(i_dev) = NULL;
724 PCM_VOLCH(i_dev) = NULL;
725
726 rdref = -1;
727 wdref = -1;
728
729 if (volch != NULL) {
730 if (volch == rdch)
731 rdref--;
732 else if (volch == wrch)
733 wdref--;
734 else {
735 CHN_LOCK(volch);
736 pcm_chnref(volch, -1);
737 CHN_UNLOCK(volch);
738 }
739 }
740
741 if (rdch != NULL)
742 CHN_REMOVE(d, rdch, channels.pcm.opened);
743 if (wrch != NULL)
744 CHN_REMOVE(d, wrch, channels.pcm.opened);
745
746 if (rdch != NULL || wrch != NULL) {
747 PCM_UNLOCK(d);
748 if (rdch != NULL) {
749 /*
750 * The channel itself need not be locked because:
751 * a) Adding a channel to a syncgroup happens only
752 * in dsp_ioctl(), which cannot run concurrently
753 * to dsp_close().
754 * b) The syncmember pointer (sm) is protected by
755 * the global syncgroup list lock.
756 * c) A channel can't just disappear, invalidating
757 * pointers, unless it's closed/dereferenced
758 * first.
759 */
760 PCM_SG_LOCK();
761 sg_ids = chn_syncdestroy(rdch);
762 PCM_SG_UNLOCK();
763 if (sg_ids != 0)
764 free_unr(pcmsg_unrhdr, sg_ids);
765
766 CHN_LOCK(rdch);
767 pcm_chnref(rdch, rdref);
768 chn_abort(rdch); /* won't sleep */
769 rdch->flags &= ~(CHN_F_RUNNING | CHN_F_MMAP |
770 CHN_F_DEAD | CHN_F_EXCLUSIVE);
771 chn_reset(rdch, 0, 0);
772 pcm_chnrelease(rdch);
773 }
774 if (wrch != NULL) {
775 /*
776 * Please see block above.
777 */
778 PCM_SG_LOCK();
779 sg_ids = chn_syncdestroy(wrch);
780 PCM_SG_UNLOCK();
781 if (sg_ids != 0)
782 free_unr(pcmsg_unrhdr, sg_ids);
783
784 CHN_LOCK(wrch);
785 pcm_chnref(wrch, wdref);
786 chn_flush(wrch); /* may sleep */
787 wrch->flags &= ~(CHN_F_RUNNING | CHN_F_MMAP |
788 CHN_F_DEAD | CHN_F_EXCLUSIVE);
789 chn_reset(wrch, 0, 0);
790 pcm_chnrelease(wrch);
791 }
792 PCM_LOCK(d);
793 }
794
795 dsp_cdevinfo_free(i_dev);
796 /*
797 * Release clone busy state and unref it so the automatic
798 * garbage collector will get the hint and do the remaining
799 * cleanup process.
800 */
801 (void)snd_clone_release(i_dev);
802
803 /*
804 * destroy_dev() might sleep, so release pcm lock
805 * here and rely on pcm cv serialization.
806 */
807 PCM_UNLOCK(d);
808 (void)snd_clone_unref(i_dev);
809 PCM_LOCK(d);
810
811 PCM_RELEASE(d);
812 PCM_UNLOCK(d);
813
814 PCM_GIANT_LEAVE(d);
815
816 return (0);
817 }
818
819 static __inline int
dsp_io_ops(struct cdev * i_dev,struct uio * buf)820 dsp_io_ops(struct cdev *i_dev, struct uio *buf)
821 {
822 struct snddev_info *d;
823 struct pcm_channel **ch, *rdch, *wrch;
824 int (*chn_io)(struct pcm_channel *, struct uio *);
825 int prio, ret;
826 pid_t runpid;
827
828 KASSERT(i_dev != NULL && buf != NULL &&
829 (buf->uio_rw == UIO_READ || buf->uio_rw == UIO_WRITE),
830 ("%s(): io train wreck!", __func__));
831
832 d = dsp_get_info(i_dev);
833 if (PCM_DETACHING(d) || !DSP_REGISTERED(d, i_dev))
834 return (EBADF);
835
836 PCM_GIANT_ENTER(d);
837
838 switch (buf->uio_rw) {
839 case UIO_READ:
840 prio = SD_F_PRIO_RD;
841 ch = &rdch;
842 chn_io = chn_read;
843 break;
844 case UIO_WRITE:
845 prio = SD_F_PRIO_WR;
846 ch = &wrch;
847 chn_io = chn_write;
848 break;
849 default:
850 panic("invalid/corrupted uio direction: %d", buf->uio_rw);
851 break;
852 }
853
854 rdch = NULL;
855 wrch = NULL;
856 runpid = buf->uio_td->td_proc->p_pid;
857
858 getchns(i_dev, &rdch, &wrch, prio);
859
860 if (*ch == NULL || !((*ch)->flags & CHN_F_BUSY)) {
861 if (rdch != NULL || wrch != NULL)
862 relchns(i_dev, rdch, wrch, prio);
863 PCM_GIANT_EXIT(d);
864 return (EBADF);
865 }
866
867 if (((*ch)->flags & (CHN_F_MMAP | CHN_F_DEAD)) ||
868 (((*ch)->flags & CHN_F_RUNNING) && (*ch)->pid != runpid)) {
869 relchns(i_dev, rdch, wrch, prio);
870 PCM_GIANT_EXIT(d);
871 return (EINVAL);
872 } else if (!((*ch)->flags & CHN_F_RUNNING)) {
873 (*ch)->flags |= CHN_F_RUNNING;
874 (*ch)->pid = runpid;
875 }
876
877 /*
878 * chn_read/write must give up channel lock in order to copy bytes
879 * from/to userland, so up the "in progress" counter to make sure
880 * someone else doesn't come along and muss up the buffer.
881 */
882 ++(*ch)->inprog;
883 ret = chn_io(*ch, buf);
884 --(*ch)->inprog;
885
886 CHN_BROADCAST(&(*ch)->cv);
887
888 relchns(i_dev, rdch, wrch, prio);
889
890 PCM_GIANT_LEAVE(d);
891
892 return (ret);
893 }
894
895 static int
dsp_read(struct cdev * i_dev,struct uio * buf,int flag)896 dsp_read(struct cdev *i_dev, struct uio *buf, int flag)
897 {
898 return (dsp_io_ops(i_dev, buf));
899 }
900
901 static int
dsp_write(struct cdev * i_dev,struct uio * buf,int flag)902 dsp_write(struct cdev *i_dev, struct uio *buf, int flag)
903 {
904 return (dsp_io_ops(i_dev, buf));
905 }
906
907 static int
dsp_get_volume_channel(struct cdev * dev,struct pcm_channel ** volch)908 dsp_get_volume_channel(struct cdev *dev, struct pcm_channel **volch)
909 {
910 struct snddev_info *d;
911 struct pcm_channel *c;
912 int unit;
913
914 KASSERT(dev != NULL && volch != NULL,
915 ("%s(): NULL query dev=%p volch=%p", __func__, dev, volch));
916
917 d = dsp_get_info(dev);
918 if (!PCM_REGISTERED(d)) {
919 *volch = NULL;
920 return (EINVAL);
921 }
922
923 PCM_UNLOCKASSERT(d);
924
925 *volch = NULL;
926
927 c = PCM_VOLCH(dev);
928 if (c != NULL) {
929 if (!(c->feederflags & (1 << FEEDER_VOLUME)))
930 return (-1);
931 *volch = c;
932 return (0);
933 }
934
935 PCM_LOCK(d);
936 PCM_WAIT(d);
937 PCM_ACQUIRE(d);
938
939 unit = dev2unit(dev);
940
941 CHN_FOREACH(c, d, channels.pcm) {
942 CHN_LOCK(c);
943 if (c->unit != unit) {
944 CHN_UNLOCK(c);
945 continue;
946 }
947 *volch = c;
948 pcm_chnref(c, 1);
949 PCM_VOLCH(dev) = c;
950 CHN_UNLOCK(c);
951 PCM_RELEASE(d);
952 PCM_UNLOCK(d);
953 return ((c->feederflags & (1 << FEEDER_VOLUME)) ? 0 : -1);
954 }
955
956 PCM_RELEASE(d);
957 PCM_UNLOCK(d);
958
959 return (EINVAL);
960 }
961
962 static int
dsp_ioctl_channel(struct cdev * dev,struct pcm_channel * volch,u_long cmd,caddr_t arg)963 dsp_ioctl_channel(struct cdev *dev, struct pcm_channel *volch, u_long cmd,
964 caddr_t arg)
965 {
966 struct snddev_info *d;
967 struct pcm_channel *rdch, *wrch;
968 int j, devtype, ret;
969
970 d = dsp_get_info(dev);
971 if (!PCM_REGISTERED(d) || !(dsp_get_flags(dev) & SD_F_VPC))
972 return (-1);
973
974 PCM_UNLOCKASSERT(d);
975
976 j = cmd & 0xff;
977
978 rdch = PCM_RDCH(dev);
979 wrch = PCM_WRCH(dev);
980
981 /* No specific channel, look into cache */
982 if (volch == NULL)
983 volch = PCM_VOLCH(dev);
984
985 /* Look harder */
986 if (volch == NULL) {
987 if (j == SOUND_MIXER_RECLEV && rdch != NULL)
988 volch = rdch;
989 else if (j == SOUND_MIXER_PCM && wrch != NULL)
990 volch = wrch;
991 }
992
993 devtype = PCMDEV(dev);
994
995 /* Look super harder */
996 if (volch == NULL &&
997 (devtype == SND_DEV_DSPHW_PLAY || devtype == SND_DEV_DSPHW_VPLAY ||
998 devtype == SND_DEV_DSPHW_REC || devtype == SND_DEV_DSPHW_VREC)) {
999 ret = dsp_get_volume_channel(dev, &volch);
1000 if (ret != 0)
1001 return (ret);
1002 if (volch == NULL)
1003 return (EINVAL);
1004 }
1005
1006 /* Final validation */
1007 if (volch != NULL) {
1008 CHN_LOCK(volch);
1009 if (!(volch->feederflags & (1 << FEEDER_VOLUME))) {
1010 CHN_UNLOCK(volch);
1011 return (-1);
1012 }
1013 if (volch->direction == PCMDIR_PLAY)
1014 wrch = volch;
1015 else
1016 rdch = volch;
1017 }
1018
1019 ret = EINVAL;
1020
1021 if (volch != NULL &&
1022 ((j == SOUND_MIXER_PCM && volch->direction == PCMDIR_PLAY) ||
1023 (j == SOUND_MIXER_RECLEV && volch->direction == PCMDIR_REC))) {
1024 if ((cmd & ~0xff) == MIXER_WRITE(0)) {
1025 int left, right, center;
1026
1027 left = *(int *)arg & 0x7f;
1028 right = ((*(int *)arg) >> 8) & 0x7f;
1029 center = (left + right) >> 1;
1030 chn_setvolume_multi(volch, SND_VOL_C_PCM, left, right,
1031 center);
1032 } else if ((cmd & ~0xff) == MIXER_READ(0)) {
1033 *(int *)arg = CHN_GETVOLUME(volch,
1034 SND_VOL_C_PCM, SND_CHN_T_FL);
1035 *(int *)arg |= CHN_GETVOLUME(volch,
1036 SND_VOL_C_PCM, SND_CHN_T_FR) << 8;
1037 }
1038 ret = 0;
1039 } else if (rdch != NULL || wrch != NULL) {
1040 switch (j) {
1041 case SOUND_MIXER_DEVMASK:
1042 case SOUND_MIXER_CAPS:
1043 case SOUND_MIXER_STEREODEVS:
1044 if ((cmd & ~0xff) == MIXER_READ(0)) {
1045 *(int *)arg = 0;
1046 if (rdch != NULL)
1047 *(int *)arg |= SOUND_MASK_RECLEV;
1048 if (wrch != NULL)
1049 *(int *)arg |= SOUND_MASK_PCM;
1050 }
1051 ret = 0;
1052 break;
1053 case SOUND_MIXER_RECMASK:
1054 case SOUND_MIXER_RECSRC:
1055 if ((cmd & ~0xff) == MIXER_READ(0))
1056 *(int *)arg = 0;
1057 ret = 0;
1058 break;
1059 default:
1060 break;
1061 }
1062 }
1063
1064 if (volch != NULL)
1065 CHN_UNLOCK(volch);
1066
1067 return (ret);
1068 }
1069
1070 static int
dsp_ioctl(struct cdev * i_dev,u_long cmd,caddr_t arg,int mode,struct thread * td)1071 dsp_ioctl(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode,
1072 struct thread *td)
1073 {
1074 struct pcm_channel *chn, *rdch, *wrch;
1075 struct snddev_info *d;
1076 u_long xcmd;
1077 int *arg_i, ret, tmp;
1078
1079 d = dsp_get_info(i_dev);
1080 if (PCM_DETACHING(d) || !DSP_REGISTERED(d, i_dev))
1081 return (EBADF);
1082
1083 PCM_GIANT_ENTER(d);
1084
1085 arg_i = (int *)arg;
1086 ret = 0;
1087 xcmd = 0;
1088 chn = NULL;
1089
1090 if (IOCGROUP(cmd) == 'M') {
1091 if (cmd == OSS_GETVERSION) {
1092 *arg_i = SOUND_VERSION;
1093 PCM_GIANT_EXIT(d);
1094 return (0);
1095 }
1096 ret = dsp_ioctl_channel(i_dev, PCM_VOLCH(i_dev), cmd, arg);
1097 if (ret != -1) {
1098 PCM_GIANT_EXIT(d);
1099 return (ret);
1100 }
1101
1102 if (d->mixer_dev != NULL) {
1103 PCM_ACQUIRE_QUICK(d);
1104 ret = mixer_ioctl_cmd(d->mixer_dev, cmd, arg, -1, td,
1105 MIXER_CMD_DIRECT);
1106 PCM_RELEASE_QUICK(d);
1107 } else
1108 ret = EBADF;
1109
1110 PCM_GIANT_EXIT(d);
1111
1112 return (ret);
1113 }
1114
1115 /*
1116 * Certain ioctls may be made on any type of device (audio, mixer,
1117 * and MIDI). Handle those special cases here.
1118 */
1119 if (IOCGROUP(cmd) == 'X') {
1120 PCM_ACQUIRE_QUICK(d);
1121 switch(cmd) {
1122 case SNDCTL_SYSINFO:
1123 sound_oss_sysinfo((oss_sysinfo *)arg);
1124 break;
1125 case SNDCTL_CARDINFO:
1126 ret = sound_oss_card_info((oss_card_info *)arg);
1127 break;
1128 case SNDCTL_AUDIOINFO:
1129 case SNDCTL_AUDIOINFO_EX:
1130 case SNDCTL_ENGINEINFO:
1131 ret = dsp_oss_audioinfo(i_dev, (oss_audioinfo *)arg);
1132 break;
1133 case SNDCTL_MIXERINFO:
1134 ret = mixer_oss_mixerinfo(i_dev, (oss_mixerinfo *)arg);
1135 break;
1136 default:
1137 ret = EINVAL;
1138 }
1139 PCM_RELEASE_QUICK(d);
1140 PCM_GIANT_EXIT(d);
1141 return (ret);
1142 }
1143
1144 getchns(i_dev, &rdch, &wrch, 0);
1145
1146 if (wrch != NULL && (wrch->flags & CHN_F_DEAD))
1147 wrch = NULL;
1148 if (rdch != NULL && (rdch->flags & CHN_F_DEAD))
1149 rdch = NULL;
1150
1151 if (wrch == NULL && rdch == NULL) {
1152 PCM_GIANT_EXIT(d);
1153 return (EINVAL);
1154 }
1155
1156 switch(cmd) {
1157 #ifdef OLDPCM_IOCTL
1158 /*
1159 * we start with the new ioctl interface.
1160 */
1161 case AIONWRITE: /* how many bytes can write ? */
1162 if (wrch) {
1163 CHN_LOCK(wrch);
1164 /*
1165 if (wrch && wrch->bufhard.dl)
1166 while (chn_wrfeed(wrch) == 0);
1167 */
1168 *arg_i = sndbuf_getfree(wrch->bufsoft);
1169 CHN_UNLOCK(wrch);
1170 } else {
1171 *arg_i = 0;
1172 ret = EINVAL;
1173 }
1174 break;
1175
1176 case AIOSSIZE: /* set the current blocksize */
1177 {
1178 struct snd_size *p = (struct snd_size *)arg;
1179
1180 p->play_size = 0;
1181 p->rec_size = 0;
1182 PCM_ACQUIRE_QUICK(d);
1183 if (wrch) {
1184 CHN_LOCK(wrch);
1185 chn_setblocksize(wrch, 2, p->play_size);
1186 p->play_size = sndbuf_getblksz(wrch->bufsoft);
1187 CHN_UNLOCK(wrch);
1188 }
1189 if (rdch) {
1190 CHN_LOCK(rdch);
1191 chn_setblocksize(rdch, 2, p->rec_size);
1192 p->rec_size = sndbuf_getblksz(rdch->bufsoft);
1193 CHN_UNLOCK(rdch);
1194 }
1195 PCM_RELEASE_QUICK(d);
1196 }
1197 break;
1198 case AIOGSIZE: /* get the current blocksize */
1199 {
1200 struct snd_size *p = (struct snd_size *)arg;
1201
1202 if (wrch) {
1203 CHN_LOCK(wrch);
1204 p->play_size = sndbuf_getblksz(wrch->bufsoft);
1205 CHN_UNLOCK(wrch);
1206 }
1207 if (rdch) {
1208 CHN_LOCK(rdch);
1209 p->rec_size = sndbuf_getblksz(rdch->bufsoft);
1210 CHN_UNLOCK(rdch);
1211 }
1212 }
1213 break;
1214
1215 case AIOSFMT:
1216 case AIOGFMT:
1217 {
1218 snd_chan_param *p = (snd_chan_param *)arg;
1219
1220 if (cmd == AIOSFMT &&
1221 ((p->play_format != 0 && p->play_rate == 0) ||
1222 (p->rec_format != 0 && p->rec_rate == 0))) {
1223 ret = EINVAL;
1224 break;
1225 }
1226 PCM_ACQUIRE_QUICK(d);
1227 if (wrch) {
1228 CHN_LOCK(wrch);
1229 if (cmd == AIOSFMT && p->play_format != 0) {
1230 chn_setformat(wrch,
1231 SND_FORMAT(p->play_format,
1232 AFMT_CHANNEL(wrch->format),
1233 AFMT_EXTCHANNEL(wrch->format)));
1234 chn_setspeed(wrch, p->play_rate);
1235 }
1236 p->play_rate = wrch->speed;
1237 p->play_format = AFMT_ENCODING(wrch->format);
1238 CHN_UNLOCK(wrch);
1239 } else {
1240 p->play_rate = 0;
1241 p->play_format = 0;
1242 }
1243 if (rdch) {
1244 CHN_LOCK(rdch);
1245 if (cmd == AIOSFMT && p->rec_format != 0) {
1246 chn_setformat(rdch,
1247 SND_FORMAT(p->rec_format,
1248 AFMT_CHANNEL(rdch->format),
1249 AFMT_EXTCHANNEL(rdch->format)));
1250 chn_setspeed(rdch, p->rec_rate);
1251 }
1252 p->rec_rate = rdch->speed;
1253 p->rec_format = AFMT_ENCODING(rdch->format);
1254 CHN_UNLOCK(rdch);
1255 } else {
1256 p->rec_rate = 0;
1257 p->rec_format = 0;
1258 }
1259 PCM_RELEASE_QUICK(d);
1260 }
1261 break;
1262
1263 case AIOGCAP: /* get capabilities */
1264 {
1265 snd_capabilities *p = (snd_capabilities *)arg;
1266 struct pcmchan_caps *pcaps = NULL, *rcaps = NULL;
1267 struct cdev *pdev;
1268
1269 PCM_LOCK(d);
1270 if (rdch) {
1271 CHN_LOCK(rdch);
1272 rcaps = chn_getcaps(rdch);
1273 }
1274 if (wrch) {
1275 CHN_LOCK(wrch);
1276 pcaps = chn_getcaps(wrch);
1277 }
1278 p->rate_min = max(rcaps? rcaps->minspeed : 0,
1279 pcaps? pcaps->minspeed : 0);
1280 p->rate_max = min(rcaps? rcaps->maxspeed : 1000000,
1281 pcaps? pcaps->maxspeed : 1000000);
1282 p->bufsize = min(rdch? sndbuf_getsize(rdch->bufsoft) : 1000000,
1283 wrch? sndbuf_getsize(wrch->bufsoft) : 1000000);
1284 /* XXX bad on sb16 */
1285 p->formats = (rdch? chn_getformats(rdch) : 0xffffffff) &
1286 (wrch? chn_getformats(wrch) : 0xffffffff);
1287 if (rdch && wrch)
1288 p->formats |= (dsp_get_flags(i_dev) & SD_F_SIMPLEX)? 0 : AFMT_FULLDUPLEX;
1289 pdev = d->mixer_dev;
1290 p->mixers = 1; /* default: one mixer */
1291 p->inputs = pdev->si_drv1? mix_getdevs(pdev->si_drv1) : 0;
1292 p->left = p->right = 100;
1293 if (wrch)
1294 CHN_UNLOCK(wrch);
1295 if (rdch)
1296 CHN_UNLOCK(rdch);
1297 PCM_UNLOCK(d);
1298 }
1299 break;
1300
1301 case AIOSTOP:
1302 if (*arg_i == AIOSYNC_PLAY && wrch) {
1303 CHN_LOCK(wrch);
1304 *arg_i = chn_abort(wrch);
1305 CHN_UNLOCK(wrch);
1306 } else if (*arg_i == AIOSYNC_CAPTURE && rdch) {
1307 CHN_LOCK(rdch);
1308 *arg_i = chn_abort(rdch);
1309 CHN_UNLOCK(rdch);
1310 } else {
1311 printf("AIOSTOP: bad channel 0x%x\n", *arg_i);
1312 *arg_i = 0;
1313 }
1314 break;
1315
1316 case AIOSYNC:
1317 printf("AIOSYNC chan 0x%03lx pos %lu unimplemented\n",
1318 ((snd_sync_parm *)arg)->chan, ((snd_sync_parm *)arg)->pos);
1319 break;
1320 #endif
1321 /*
1322 * here follow the standard ioctls (filio.h etc.)
1323 */
1324 case FIONREAD: /* get # bytes to read */
1325 if (rdch) {
1326 CHN_LOCK(rdch);
1327 /* if (rdch && rdch->bufhard.dl)
1328 while (chn_rdfeed(rdch) == 0);
1329 */
1330 *arg_i = sndbuf_getready(rdch->bufsoft);
1331 CHN_UNLOCK(rdch);
1332 } else {
1333 *arg_i = 0;
1334 ret = EINVAL;
1335 }
1336 break;
1337
1338 case FIOASYNC: /*set/clear async i/o */
1339 DEB( printf("FIOASYNC\n") ; )
1340 break;
1341
1342 case SNDCTL_DSP_NONBLOCK: /* set non-blocking i/o */
1343 case FIONBIO: /* set/clear non-blocking i/o */
1344 if (rdch) {
1345 CHN_LOCK(rdch);
1346 if (cmd == SNDCTL_DSP_NONBLOCK || *arg_i)
1347 rdch->flags |= CHN_F_NBIO;
1348 else
1349 rdch->flags &= ~CHN_F_NBIO;
1350 CHN_UNLOCK(rdch);
1351 }
1352 if (wrch) {
1353 CHN_LOCK(wrch);
1354 if (cmd == SNDCTL_DSP_NONBLOCK || *arg_i)
1355 wrch->flags |= CHN_F_NBIO;
1356 else
1357 wrch->flags &= ~CHN_F_NBIO;
1358 CHN_UNLOCK(wrch);
1359 }
1360 break;
1361
1362 /*
1363 * Finally, here is the linux-compatible ioctl interface
1364 */
1365 #define THE_REAL_SNDCTL_DSP_GETBLKSIZE _IOWR('P', 4, int)
1366 case THE_REAL_SNDCTL_DSP_GETBLKSIZE:
1367 case SNDCTL_DSP_GETBLKSIZE:
1368 chn = wrch ? wrch : rdch;
1369 if (chn) {
1370 CHN_LOCK(chn);
1371 *arg_i = sndbuf_getblksz(chn->bufsoft);
1372 CHN_UNLOCK(chn);
1373 } else {
1374 *arg_i = 0;
1375 ret = EINVAL;
1376 }
1377 break;
1378
1379 case SNDCTL_DSP_SETBLKSIZE:
1380 RANGE(*arg_i, 16, 65536);
1381 PCM_ACQUIRE_QUICK(d);
1382 if (wrch) {
1383 CHN_LOCK(wrch);
1384 chn_setblocksize(wrch, 2, *arg_i);
1385 CHN_UNLOCK(wrch);
1386 }
1387 if (rdch) {
1388 CHN_LOCK(rdch);
1389 chn_setblocksize(rdch, 2, *arg_i);
1390 CHN_UNLOCK(rdch);
1391 }
1392 PCM_RELEASE_QUICK(d);
1393 break;
1394
1395 case SNDCTL_DSP_RESET:
1396 DEB(printf("dsp reset\n"));
1397 if (wrch) {
1398 CHN_LOCK(wrch);
1399 chn_abort(wrch);
1400 chn_resetbuf(wrch);
1401 CHN_UNLOCK(wrch);
1402 }
1403 if (rdch) {
1404 CHN_LOCK(rdch);
1405 chn_abort(rdch);
1406 chn_resetbuf(rdch);
1407 CHN_UNLOCK(rdch);
1408 }
1409 break;
1410
1411 case SNDCTL_DSP_SYNC:
1412 DEB(printf("dsp sync\n"));
1413 /* chn_sync may sleep */
1414 if (wrch) {
1415 CHN_LOCK(wrch);
1416 chn_sync(wrch, 0);
1417 CHN_UNLOCK(wrch);
1418 }
1419 break;
1420
1421 case SNDCTL_DSP_SPEED:
1422 /* chn_setspeed may sleep */
1423 tmp = 0;
1424 PCM_ACQUIRE_QUICK(d);
1425 if (wrch) {
1426 CHN_LOCK(wrch);
1427 ret = chn_setspeed(wrch, *arg_i);
1428 tmp = wrch->speed;
1429 CHN_UNLOCK(wrch);
1430 }
1431 if (rdch && ret == 0) {
1432 CHN_LOCK(rdch);
1433 ret = chn_setspeed(rdch, *arg_i);
1434 if (tmp == 0)
1435 tmp = rdch->speed;
1436 CHN_UNLOCK(rdch);
1437 }
1438 PCM_RELEASE_QUICK(d);
1439 *arg_i = tmp;
1440 break;
1441
1442 case SOUND_PCM_READ_RATE:
1443 chn = wrch ? wrch : rdch;
1444 if (chn) {
1445 CHN_LOCK(chn);
1446 *arg_i = chn->speed;
1447 CHN_UNLOCK(chn);
1448 } else {
1449 *arg_i = 0;
1450 ret = EINVAL;
1451 }
1452 break;
1453
1454 case SNDCTL_DSP_STEREO:
1455 tmp = -1;
1456 *arg_i = (*arg_i)? 2 : 1;
1457 PCM_ACQUIRE_QUICK(d);
1458 if (wrch) {
1459 CHN_LOCK(wrch);
1460 ret = chn_setformat(wrch,
1461 SND_FORMAT(wrch->format, *arg_i, 0));
1462 tmp = (AFMT_CHANNEL(wrch->format) > 1)? 1 : 0;
1463 CHN_UNLOCK(wrch);
1464 }
1465 if (rdch && ret == 0) {
1466 CHN_LOCK(rdch);
1467 ret = chn_setformat(rdch,
1468 SND_FORMAT(rdch->format, *arg_i, 0));
1469 if (tmp == -1)
1470 tmp = (AFMT_CHANNEL(rdch->format) > 1)? 1 : 0;
1471 CHN_UNLOCK(rdch);
1472 }
1473 PCM_RELEASE_QUICK(d);
1474 *arg_i = tmp;
1475 break;
1476
1477 case SOUND_PCM_WRITE_CHANNELS:
1478 /* case SNDCTL_DSP_CHANNELS: ( == SOUND_PCM_WRITE_CHANNELS) */
1479 if (*arg_i < 0) {
1480 *arg_i = 0;
1481 ret = EINVAL;
1482 break;
1483 }
1484 if (*arg_i != 0) {
1485 struct pcmchan_matrix *m;
1486 uint32_t ext;
1487
1488 tmp = 0;
1489 if (*arg_i > SND_CHN_MAX)
1490 *arg_i = SND_CHN_MAX;
1491
1492 m = feeder_matrix_default_channel_map(*arg_i);
1493 if (m != NULL)
1494 ext = m->ext;
1495 else
1496 ext = 0;
1497
1498 PCM_ACQUIRE_QUICK(d);
1499 if (wrch) {
1500 CHN_LOCK(wrch);
1501 ret = chn_setformat(wrch,
1502 SND_FORMAT(wrch->format, *arg_i, ext));
1503 tmp = AFMT_CHANNEL(wrch->format);
1504 CHN_UNLOCK(wrch);
1505 }
1506 if (rdch && ret == 0) {
1507 CHN_LOCK(rdch);
1508 ret = chn_setformat(rdch,
1509 SND_FORMAT(rdch->format, *arg_i, ext));
1510 if (tmp == 0)
1511 tmp = AFMT_CHANNEL(rdch->format);
1512 CHN_UNLOCK(rdch);
1513 }
1514 PCM_RELEASE_QUICK(d);
1515 *arg_i = tmp;
1516 } else {
1517 chn = wrch ? wrch : rdch;
1518 CHN_LOCK(chn);
1519 *arg_i = AFMT_CHANNEL(chn->format);
1520 CHN_UNLOCK(chn);
1521 }
1522 break;
1523
1524 case SOUND_PCM_READ_CHANNELS:
1525 chn = wrch ? wrch : rdch;
1526 if (chn) {
1527 CHN_LOCK(chn);
1528 *arg_i = AFMT_CHANNEL(chn->format);
1529 CHN_UNLOCK(chn);
1530 } else {
1531 *arg_i = 0;
1532 ret = EINVAL;
1533 }
1534 break;
1535
1536 case SNDCTL_DSP_GETFMTS: /* returns a mask of supported fmts */
1537 chn = wrch ? wrch : rdch;
1538 if (chn) {
1539 CHN_LOCK(chn);
1540 *arg_i = chn_getformats(chn);
1541 CHN_UNLOCK(chn);
1542 } else {
1543 *arg_i = 0;
1544 ret = EINVAL;
1545 }
1546 break;
1547
1548 case SNDCTL_DSP_SETFMT: /* sets _one_ format */
1549 if (*arg_i != AFMT_QUERY) {
1550 tmp = 0;
1551 PCM_ACQUIRE_QUICK(d);
1552 if (wrch) {
1553 CHN_LOCK(wrch);
1554 ret = chn_setformat(wrch, SND_FORMAT(*arg_i,
1555 AFMT_CHANNEL(wrch->format),
1556 AFMT_EXTCHANNEL(wrch->format)));
1557 tmp = wrch->format;
1558 CHN_UNLOCK(wrch);
1559 }
1560 if (rdch && ret == 0) {
1561 CHN_LOCK(rdch);
1562 ret = chn_setformat(rdch, SND_FORMAT(*arg_i,
1563 AFMT_CHANNEL(rdch->format),
1564 AFMT_EXTCHANNEL(rdch->format)));
1565 if (tmp == 0)
1566 tmp = rdch->format;
1567 CHN_UNLOCK(rdch);
1568 }
1569 PCM_RELEASE_QUICK(d);
1570 *arg_i = AFMT_ENCODING(tmp);
1571 } else {
1572 chn = wrch ? wrch : rdch;
1573 CHN_LOCK(chn);
1574 *arg_i = AFMT_ENCODING(chn->format);
1575 CHN_UNLOCK(chn);
1576 }
1577 break;
1578
1579 case SNDCTL_DSP_SETFRAGMENT:
1580 DEB(printf("SNDCTL_DSP_SETFRAGMENT 0x%08x\n", *(int *)arg));
1581 {
1582 uint32_t fragln = (*arg_i) & 0x0000ffff;
1583 uint32_t maxfrags = ((*arg_i) & 0xffff0000) >> 16;
1584 uint32_t fragsz;
1585 uint32_t r_maxfrags, r_fragsz;
1586
1587 RANGE(fragln, 4, 16);
1588 fragsz = 1 << fragln;
1589
1590 if (maxfrags == 0)
1591 maxfrags = CHN_2NDBUFMAXSIZE / fragsz;
1592 if (maxfrags < 2)
1593 maxfrags = 2;
1594 if (maxfrags * fragsz > CHN_2NDBUFMAXSIZE)
1595 maxfrags = CHN_2NDBUFMAXSIZE / fragsz;
1596
1597 DEB(printf("SNDCTL_DSP_SETFRAGMENT %d frags, %d sz\n", maxfrags, fragsz));
1598 PCM_ACQUIRE_QUICK(d);
1599 if (rdch) {
1600 CHN_LOCK(rdch);
1601 ret = chn_setblocksize(rdch, maxfrags, fragsz);
1602 r_maxfrags = sndbuf_getblkcnt(rdch->bufsoft);
1603 r_fragsz = sndbuf_getblksz(rdch->bufsoft);
1604 CHN_UNLOCK(rdch);
1605 } else {
1606 r_maxfrags = maxfrags;
1607 r_fragsz = fragsz;
1608 }
1609 if (wrch && ret == 0) {
1610 CHN_LOCK(wrch);
1611 ret = chn_setblocksize(wrch, maxfrags, fragsz);
1612 maxfrags = sndbuf_getblkcnt(wrch->bufsoft);
1613 fragsz = sndbuf_getblksz(wrch->bufsoft);
1614 CHN_UNLOCK(wrch);
1615 } else { /* use whatever came from the read channel */
1616 maxfrags = r_maxfrags;
1617 fragsz = r_fragsz;
1618 }
1619 PCM_RELEASE_QUICK(d);
1620
1621 fragln = 0;
1622 while (fragsz > 1) {
1623 fragln++;
1624 fragsz >>= 1;
1625 }
1626 *arg_i = (maxfrags << 16) | fragln;
1627 }
1628 break;
1629
1630 case SNDCTL_DSP_GETISPACE:
1631 /* return the size of data available in the input queue */
1632 {
1633 audio_buf_info *a = (audio_buf_info *)arg;
1634 if (rdch) {
1635 struct snd_dbuf *bs = rdch->bufsoft;
1636
1637 CHN_LOCK(rdch);
1638 a->bytes = sndbuf_getready(bs);
1639 a->fragments = a->bytes / sndbuf_getblksz(bs);
1640 a->fragstotal = sndbuf_getblkcnt(bs);
1641 a->fragsize = sndbuf_getblksz(bs);
1642 CHN_UNLOCK(rdch);
1643 } else
1644 ret = EINVAL;
1645 }
1646 break;
1647
1648 case SNDCTL_DSP_GETOSPACE:
1649 /* return space available in the output queue */
1650 {
1651 audio_buf_info *a = (audio_buf_info *)arg;
1652 if (wrch) {
1653 struct snd_dbuf *bs = wrch->bufsoft;
1654
1655 CHN_LOCK(wrch);
1656 /* XXX abusive DMA update: chn_wrupdate(wrch); */
1657 a->bytes = sndbuf_getfree(bs);
1658 a->fragments = a->bytes / sndbuf_getblksz(bs);
1659 a->fragstotal = sndbuf_getblkcnt(bs);
1660 a->fragsize = sndbuf_getblksz(bs);
1661 CHN_UNLOCK(wrch);
1662 } else
1663 ret = EINVAL;
1664 }
1665 break;
1666
1667 case SNDCTL_DSP_GETIPTR:
1668 {
1669 count_info *a = (count_info *)arg;
1670 if (rdch) {
1671 struct snd_dbuf *bs = rdch->bufsoft;
1672
1673 CHN_LOCK(rdch);
1674 /* XXX abusive DMA update: chn_rdupdate(rdch); */
1675 a->bytes = sndbuf_gettotal(bs);
1676 a->blocks = sndbuf_getblocks(bs) - rdch->blocks;
1677 a->ptr = sndbuf_getfreeptr(bs);
1678 rdch->blocks = sndbuf_getblocks(bs);
1679 CHN_UNLOCK(rdch);
1680 } else
1681 ret = EINVAL;
1682 }
1683 break;
1684
1685 case SNDCTL_DSP_GETOPTR:
1686 {
1687 count_info *a = (count_info *)arg;
1688 if (wrch) {
1689 struct snd_dbuf *bs = wrch->bufsoft;
1690
1691 CHN_LOCK(wrch);
1692 /* XXX abusive DMA update: chn_wrupdate(wrch); */
1693 a->bytes = sndbuf_gettotal(bs);
1694 a->blocks = sndbuf_getblocks(bs) - wrch->blocks;
1695 a->ptr = sndbuf_getreadyptr(bs);
1696 wrch->blocks = sndbuf_getblocks(bs);
1697 CHN_UNLOCK(wrch);
1698 } else
1699 ret = EINVAL;
1700 }
1701 break;
1702
1703 case SNDCTL_DSP_GETCAPS:
1704 PCM_LOCK(d);
1705 *arg_i = PCM_CAP_REALTIME | PCM_CAP_MMAP | PCM_CAP_TRIGGER;
1706 if (rdch && wrch && !(dsp_get_flags(i_dev) & SD_F_SIMPLEX))
1707 *arg_i |= PCM_CAP_DUPLEX;
1708 if (rdch && (rdch->flags & CHN_F_VIRTUAL) != 0)
1709 *arg_i |= PCM_CAP_VIRTUAL;
1710 if (wrch && (wrch->flags & CHN_F_VIRTUAL) != 0)
1711 *arg_i |= PCM_CAP_VIRTUAL;
1712 PCM_UNLOCK(d);
1713 break;
1714
1715 case SOUND_PCM_READ_BITS:
1716 chn = wrch ? wrch : rdch;
1717 if (chn) {
1718 CHN_LOCK(chn);
1719 if (chn->format & AFMT_8BIT)
1720 *arg_i = 8;
1721 else if (chn->format & AFMT_16BIT)
1722 *arg_i = 16;
1723 else if (chn->format & AFMT_24BIT)
1724 *arg_i = 24;
1725 else if (chn->format & AFMT_32BIT)
1726 *arg_i = 32;
1727 else
1728 ret = EINVAL;
1729 CHN_UNLOCK(chn);
1730 } else {
1731 *arg_i = 0;
1732 ret = EINVAL;
1733 }
1734 break;
1735
1736 case SNDCTL_DSP_SETTRIGGER:
1737 if (rdch) {
1738 CHN_LOCK(rdch);
1739 rdch->flags &= ~CHN_F_NOTRIGGER;
1740 if (*arg_i & PCM_ENABLE_INPUT)
1741 chn_start(rdch, 1);
1742 else {
1743 chn_abort(rdch);
1744 chn_resetbuf(rdch);
1745 rdch->flags |= CHN_F_NOTRIGGER;
1746 }
1747 CHN_UNLOCK(rdch);
1748 }
1749 if (wrch) {
1750 CHN_LOCK(wrch);
1751 wrch->flags &= ~CHN_F_NOTRIGGER;
1752 if (*arg_i & PCM_ENABLE_OUTPUT)
1753 chn_start(wrch, 1);
1754 else {
1755 chn_abort(wrch);
1756 chn_resetbuf(wrch);
1757 wrch->flags |= CHN_F_NOTRIGGER;
1758 }
1759 CHN_UNLOCK(wrch);
1760 }
1761 break;
1762
1763 case SNDCTL_DSP_GETTRIGGER:
1764 *arg_i = 0;
1765 if (wrch) {
1766 CHN_LOCK(wrch);
1767 if (wrch->flags & CHN_F_TRIGGERED)
1768 *arg_i |= PCM_ENABLE_OUTPUT;
1769 CHN_UNLOCK(wrch);
1770 }
1771 if (rdch) {
1772 CHN_LOCK(rdch);
1773 if (rdch->flags & CHN_F_TRIGGERED)
1774 *arg_i |= PCM_ENABLE_INPUT;
1775 CHN_UNLOCK(rdch);
1776 }
1777 break;
1778
1779 case SNDCTL_DSP_GETODELAY:
1780 if (wrch) {
1781 struct snd_dbuf *bs = wrch->bufsoft;
1782
1783 CHN_LOCK(wrch);
1784 /* XXX abusive DMA update: chn_wrupdate(wrch); */
1785 *arg_i = sndbuf_getready(bs);
1786 CHN_UNLOCK(wrch);
1787 } else
1788 ret = EINVAL;
1789 break;
1790
1791 case SNDCTL_DSP_POST:
1792 if (wrch) {
1793 CHN_LOCK(wrch);
1794 wrch->flags &= ~CHN_F_NOTRIGGER;
1795 chn_start(wrch, 1);
1796 CHN_UNLOCK(wrch);
1797 }
1798 break;
1799
1800 case SNDCTL_DSP_SETDUPLEX:
1801 /*
1802 * switch to full-duplex mode if card is in half-duplex
1803 * mode and is able to work in full-duplex mode
1804 */
1805 PCM_LOCK(d);
1806 if (rdch && wrch && (dsp_get_flags(i_dev) & SD_F_SIMPLEX))
1807 dsp_set_flags(i_dev, dsp_get_flags(i_dev)^SD_F_SIMPLEX);
1808 PCM_UNLOCK(d);
1809 break;
1810
1811 /*
1812 * The following four ioctls are simple wrappers around mixer_ioctl
1813 * with no further processing. xcmd is short for "translated
1814 * command".
1815 */
1816 case SNDCTL_DSP_GETRECVOL:
1817 if (xcmd == 0) {
1818 xcmd = SOUND_MIXER_READ_RECLEV;
1819 chn = rdch;
1820 }
1821 /* FALLTHROUGH */
1822 case SNDCTL_DSP_SETRECVOL:
1823 if (xcmd == 0) {
1824 xcmd = SOUND_MIXER_WRITE_RECLEV;
1825 chn = rdch;
1826 }
1827 /* FALLTHROUGH */
1828 case SNDCTL_DSP_GETPLAYVOL:
1829 if (xcmd == 0) {
1830 xcmd = SOUND_MIXER_READ_PCM;
1831 chn = wrch;
1832 }
1833 /* FALLTHROUGH */
1834 case SNDCTL_DSP_SETPLAYVOL:
1835 if (xcmd == 0) {
1836 xcmd = SOUND_MIXER_WRITE_PCM;
1837 chn = wrch;
1838 }
1839
1840 ret = dsp_ioctl_channel(i_dev, chn, xcmd, arg);
1841 if (ret != -1) {
1842 PCM_GIANT_EXIT(d);
1843 return (ret);
1844 }
1845
1846 if (d->mixer_dev != NULL) {
1847 PCM_ACQUIRE_QUICK(d);
1848 ret = mixer_ioctl_cmd(d->mixer_dev, xcmd, arg, -1, td,
1849 MIXER_CMD_DIRECT);
1850 PCM_RELEASE_QUICK(d);
1851 } else
1852 ret = ENOTSUP;
1853
1854 break;
1855
1856 case SNDCTL_DSP_GET_RECSRC_NAMES:
1857 case SNDCTL_DSP_GET_RECSRC:
1858 case SNDCTL_DSP_SET_RECSRC:
1859 if (d->mixer_dev != NULL) {
1860 PCM_ACQUIRE_QUICK(d);
1861 ret = mixer_ioctl_cmd(d->mixer_dev, cmd, arg, -1, td,
1862 MIXER_CMD_DIRECT);
1863 PCM_RELEASE_QUICK(d);
1864 } else
1865 ret = ENOTSUP;
1866 break;
1867
1868 /*
1869 * The following 3 ioctls aren't very useful at the moment. For
1870 * now, only a single channel is associated with a cdev (/dev/dspN
1871 * instance), so there's only a single output routing to use (i.e.,
1872 * the wrch bound to this cdev).
1873 */
1874 case SNDCTL_DSP_GET_PLAYTGT_NAMES:
1875 {
1876 oss_mixer_enuminfo *ei;
1877 ei = (oss_mixer_enuminfo *)arg;
1878 ei->dev = 0;
1879 ei->ctrl = 0;
1880 ei->version = 0; /* static for now */
1881 ei->strindex[0] = 0;
1882
1883 if (wrch != NULL) {
1884 ei->nvalues = 1;
1885 strlcpy(ei->strings, wrch->name,
1886 sizeof(ei->strings));
1887 } else {
1888 ei->nvalues = 0;
1889 ei->strings[0] = '\0';
1890 }
1891 }
1892 break;
1893 case SNDCTL_DSP_GET_PLAYTGT:
1894 case SNDCTL_DSP_SET_PLAYTGT: /* yes, they are the same for now */
1895 /*
1896 * Re: SET_PLAYTGT
1897 * OSSv4: "The value that was accepted by the device will
1898 * be returned back in the variable pointed by the
1899 * argument."
1900 */
1901 if (wrch != NULL)
1902 *arg_i = 0;
1903 else
1904 ret = EINVAL;
1905 break;
1906
1907 case SNDCTL_DSP_SILENCE:
1908 /*
1909 * Flush the software (pre-feed) buffer, but try to minimize playback
1910 * interruption. (I.e., record unplayed samples with intent to
1911 * restore by SNDCTL_DSP_SKIP.) Intended for application "pause"
1912 * functionality.
1913 */
1914 if (wrch == NULL)
1915 ret = EINVAL;
1916 else {
1917 struct snd_dbuf *bs;
1918 CHN_LOCK(wrch);
1919 while (wrch->inprog != 0)
1920 cv_wait(&wrch->cv, wrch->lock);
1921 bs = wrch->bufsoft;
1922 if ((bs->shadbuf != NULL) && (sndbuf_getready(bs) > 0)) {
1923 bs->sl = sndbuf_getready(bs);
1924 sndbuf_dispose(bs, bs->shadbuf, sndbuf_getready(bs));
1925 sndbuf_fillsilence(bs);
1926 chn_start(wrch, 0);
1927 }
1928 CHN_UNLOCK(wrch);
1929 }
1930 break;
1931
1932 case SNDCTL_DSP_SKIP:
1933 /*
1934 * OSSv4 docs: "This ioctl call discards all unplayed samples in the
1935 * playback buffer by moving the current write position immediately
1936 * before the point where the device is currently reading the samples."
1937 */
1938 if (wrch == NULL)
1939 ret = EINVAL;
1940 else {
1941 struct snd_dbuf *bs;
1942 CHN_LOCK(wrch);
1943 while (wrch->inprog != 0)
1944 cv_wait(&wrch->cv, wrch->lock);
1945 bs = wrch->bufsoft;
1946 if ((bs->shadbuf != NULL) && (bs->sl > 0)) {
1947 sndbuf_softreset(bs);
1948 sndbuf_acquire(bs, bs->shadbuf, bs->sl);
1949 bs->sl = 0;
1950 chn_start(wrch, 0);
1951 }
1952 CHN_UNLOCK(wrch);
1953 }
1954 break;
1955
1956 case SNDCTL_DSP_CURRENT_OPTR:
1957 case SNDCTL_DSP_CURRENT_IPTR:
1958 /**
1959 * @note Changing formats resets the buffer counters, which differs
1960 * from the 4Front drivers. However, I don't expect this to be
1961 * much of a problem.
1962 *
1963 * @note In a test where @c CURRENT_OPTR is called immediately after write
1964 * returns, this driver is about 32K samples behind whereas
1965 * 4Front's is about 8K samples behind. Should determine source
1966 * of discrepancy, even if only out of curiosity.
1967 *
1968 * @todo Actually test SNDCTL_DSP_CURRENT_IPTR.
1969 */
1970 chn = (cmd == SNDCTL_DSP_CURRENT_OPTR) ? wrch : rdch;
1971 if (chn == NULL)
1972 ret = EINVAL;
1973 else {
1974 struct snd_dbuf *bs;
1975 /* int tmp; */
1976
1977 oss_count_t *oc = (oss_count_t *)arg;
1978
1979 CHN_LOCK(chn);
1980 bs = chn->bufsoft;
1981 #if 0
1982 tmp = (sndbuf_getsize(b) + chn_getptr(chn) - sndbuf_gethwptr(b)) % sndbuf_getsize(b);
1983 oc->samples = (sndbuf_gettotal(b) + tmp) / sndbuf_getalign(b);
1984 oc->fifo_samples = (sndbuf_getready(b) - tmp) / sndbuf_getalign(b);
1985 #else
1986 oc->samples = sndbuf_gettotal(bs) / sndbuf_getalign(bs);
1987 oc->fifo_samples = sndbuf_getready(bs) / sndbuf_getalign(bs);
1988 #endif
1989 CHN_UNLOCK(chn);
1990 }
1991 break;
1992
1993 case SNDCTL_DSP_HALT_OUTPUT:
1994 case SNDCTL_DSP_HALT_INPUT:
1995 chn = (cmd == SNDCTL_DSP_HALT_OUTPUT) ? wrch : rdch;
1996 if (chn == NULL)
1997 ret = EINVAL;
1998 else {
1999 CHN_LOCK(chn);
2000 chn_abort(chn);
2001 CHN_UNLOCK(chn);
2002 }
2003 break;
2004
2005 case SNDCTL_DSP_LOW_WATER:
2006 /*
2007 * Set the number of bytes required to attract attention by
2008 * select/poll.
2009 */
2010 if (wrch != NULL) {
2011 CHN_LOCK(wrch);
2012 wrch->lw = (*arg_i > 1) ? *arg_i : 1;
2013 CHN_UNLOCK(wrch);
2014 }
2015 if (rdch != NULL) {
2016 CHN_LOCK(rdch);
2017 rdch->lw = (*arg_i > 1) ? *arg_i : 1;
2018 CHN_UNLOCK(rdch);
2019 }
2020 break;
2021
2022 case SNDCTL_DSP_GETERROR:
2023 /*
2024 * OSSv4 docs: "All errors and counters will automatically be
2025 * cleared to zeroes after the call so each call will return only
2026 * the errors that occurred after the previous invocation. ... The
2027 * play_underruns and rec_overrun fields are the only useful fields
2028 * returned by OSS 4.0."
2029 */
2030 {
2031 audio_errinfo *ei = (audio_errinfo *)arg;
2032
2033 bzero((void *)ei, sizeof(*ei));
2034
2035 if (wrch != NULL) {
2036 CHN_LOCK(wrch);
2037 ei->play_underruns = wrch->xruns;
2038 wrch->xruns = 0;
2039 CHN_UNLOCK(wrch);
2040 }
2041 if (rdch != NULL) {
2042 CHN_LOCK(rdch);
2043 ei->rec_overruns = rdch->xruns;
2044 rdch->xruns = 0;
2045 CHN_UNLOCK(rdch);
2046 }
2047 }
2048 break;
2049
2050 case SNDCTL_DSP_SYNCGROUP:
2051 PCM_ACQUIRE_QUICK(d);
2052 ret = dsp_oss_syncgroup(wrch, rdch, (oss_syncgroup *)arg);
2053 PCM_RELEASE_QUICK(d);
2054 break;
2055
2056 case SNDCTL_DSP_SYNCSTART:
2057 PCM_ACQUIRE_QUICK(d);
2058 ret = dsp_oss_syncstart(*arg_i);
2059 PCM_RELEASE_QUICK(d);
2060 break;
2061
2062 case SNDCTL_DSP_POLICY:
2063 PCM_ACQUIRE_QUICK(d);
2064 ret = dsp_oss_policy(wrch, rdch, *arg_i);
2065 PCM_RELEASE_QUICK(d);
2066 break;
2067
2068 case SNDCTL_DSP_COOKEDMODE:
2069 PCM_ACQUIRE_QUICK(d);
2070 if (!(dsp_get_flags(i_dev) & SD_F_BITPERFECT))
2071 ret = dsp_oss_cookedmode(wrch, rdch, *arg_i);
2072 PCM_RELEASE_QUICK(d);
2073 break;
2074 case SNDCTL_DSP_GET_CHNORDER:
2075 PCM_ACQUIRE_QUICK(d);
2076 ret = dsp_oss_getchnorder(wrch, rdch, (unsigned long long *)arg);
2077 PCM_RELEASE_QUICK(d);
2078 break;
2079 case SNDCTL_DSP_SET_CHNORDER:
2080 PCM_ACQUIRE_QUICK(d);
2081 ret = dsp_oss_setchnorder(wrch, rdch, (unsigned long long *)arg);
2082 PCM_RELEASE_QUICK(d);
2083 break;
2084 case SNDCTL_DSP_GETCHANNELMASK: /* XXX vlc */
2085 PCM_ACQUIRE_QUICK(d);
2086 ret = dsp_oss_getchannelmask(wrch, rdch, (int *)arg);
2087 PCM_RELEASE_QUICK(d);
2088 break;
2089 case SNDCTL_DSP_BIND_CHANNEL: /* XXX what?!? */
2090 ret = EINVAL;
2091 break;
2092 #ifdef OSSV4_EXPERIMENT
2093 /*
2094 * XXX The following ioctls are not yet supported and just return
2095 * EINVAL.
2096 */
2097 case SNDCTL_DSP_GETOPEAKS:
2098 case SNDCTL_DSP_GETIPEAKS:
2099 chn = (cmd == SNDCTL_DSP_GETOPEAKS) ? wrch : rdch;
2100 if (chn == NULL)
2101 ret = EINVAL;
2102 else {
2103 oss_peaks_t *op = (oss_peaks_t *)arg;
2104 int lpeak, rpeak;
2105
2106 CHN_LOCK(chn);
2107 ret = chn_getpeaks(chn, &lpeak, &rpeak);
2108 if (ret == -1)
2109 ret = EINVAL;
2110 else {
2111 (*op)[0] = lpeak;
2112 (*op)[1] = rpeak;
2113 }
2114 CHN_UNLOCK(chn);
2115 }
2116 break;
2117
2118 /*
2119 * XXX Once implemented, revisit this for proper cv protection
2120 * (if necessary).
2121 */
2122 case SNDCTL_GETLABEL:
2123 ret = dsp_oss_getlabel(wrch, rdch, (oss_label_t *)arg);
2124 break;
2125 case SNDCTL_SETLABEL:
2126 ret = dsp_oss_setlabel(wrch, rdch, (oss_label_t *)arg);
2127 break;
2128 case SNDCTL_GETSONG:
2129 ret = dsp_oss_getsong(wrch, rdch, (oss_longname_t *)arg);
2130 break;
2131 case SNDCTL_SETSONG:
2132 ret = dsp_oss_setsong(wrch, rdch, (oss_longname_t *)arg);
2133 break;
2134 case SNDCTL_SETNAME:
2135 ret = dsp_oss_setname(wrch, rdch, (oss_longname_t *)arg);
2136 break;
2137 #if 0
2138 /**
2139 * @note The S/PDIF interface ioctls, @c SNDCTL_DSP_READCTL and
2140 * @c SNDCTL_DSP_WRITECTL have been omitted at the suggestion of
2141 * 4Front Technologies.
2142 */
2143 case SNDCTL_DSP_READCTL:
2144 case SNDCTL_DSP_WRITECTL:
2145 ret = EINVAL;
2146 break;
2147 #endif /* !0 (explicitly omitted ioctls) */
2148
2149 #endif /* !OSSV4_EXPERIMENT */
2150 case SNDCTL_DSP_MAPINBUF:
2151 case SNDCTL_DSP_MAPOUTBUF:
2152 case SNDCTL_DSP_SETSYNCRO:
2153 /* undocumented */
2154
2155 case SNDCTL_DSP_SUBDIVIDE:
2156 case SOUND_PCM_WRITE_FILTER:
2157 case SOUND_PCM_READ_FILTER:
2158 /* dunno what these do, don't sound important */
2159
2160 default:
2161 DEB(printf("default ioctl fn 0x%08lx fail\n", cmd));
2162 ret = EINVAL;
2163 break;
2164 }
2165
2166 PCM_GIANT_LEAVE(d);
2167
2168 return (ret);
2169 }
2170
2171 static int
dsp_poll(struct cdev * i_dev,int events,struct thread * td)2172 dsp_poll(struct cdev *i_dev, int events, struct thread *td)
2173 {
2174 struct snddev_info *d;
2175 struct pcm_channel *wrch, *rdch;
2176 int ret, e;
2177
2178 d = dsp_get_info(i_dev);
2179 if (PCM_DETACHING(d) || !DSP_REGISTERED(d, i_dev)) {
2180 /* XXX many clients don't understand POLLNVAL */
2181 return (events & (POLLHUP | POLLPRI | POLLIN |
2182 POLLRDNORM | POLLOUT | POLLWRNORM));
2183 }
2184 PCM_GIANT_ENTER(d);
2185
2186 wrch = NULL;
2187 rdch = NULL;
2188 ret = 0;
2189
2190 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
2191
2192 if (wrch != NULL && !(wrch->flags & CHN_F_DEAD)) {
2193 e = (events & (POLLOUT | POLLWRNORM));
2194 if (e)
2195 ret |= chn_poll(wrch, e, td);
2196 }
2197
2198 if (rdch != NULL && !(rdch->flags & CHN_F_DEAD)) {
2199 e = (events & (POLLIN | POLLRDNORM));
2200 if (e)
2201 ret |= chn_poll(rdch, e, td);
2202 }
2203
2204 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
2205
2206 PCM_GIANT_LEAVE(d);
2207
2208 return (ret);
2209 }
2210
2211 static int
dsp_mmap(struct cdev * i_dev,vm_ooffset_t offset,vm_paddr_t * paddr,int nprot,vm_memattr_t * memattr)2212 dsp_mmap(struct cdev *i_dev, vm_ooffset_t offset, vm_paddr_t *paddr,
2213 int nprot, vm_memattr_t *memattr)
2214 {
2215
2216 /*
2217 * offset is in range due to checks in dsp_mmap_single().
2218 * XXX memattr is not honored.
2219 */
2220 *paddr = vtophys(offset);
2221 return (0);
2222 }
2223
2224 static int
dsp_mmap_single(struct cdev * i_dev,vm_ooffset_t * offset,vm_size_t size,struct vm_object ** object,int nprot)2225 dsp_mmap_single(struct cdev *i_dev, vm_ooffset_t *offset,
2226 vm_size_t size, struct vm_object **object, int nprot)
2227 {
2228 struct snddev_info *d;
2229 struct pcm_channel *wrch, *rdch, *c;
2230
2231 /*
2232 * Reject PROT_EXEC by default. It just doesn't makes sense.
2233 * Unfortunately, we have to give up this one due to linux_mmap
2234 * changes.
2235 *
2236 * https://lists.freebsd.org/pipermail/freebsd-emulation/2007-June/003698.html
2237 *
2238 */
2239 #ifdef SV_ABI_LINUX
2240 if ((nprot & PROT_EXEC) && (dsp_mmap_allow_prot_exec < 0 ||
2241 (dsp_mmap_allow_prot_exec == 0 &&
2242 SV_CURPROC_ABI() != SV_ABI_LINUX)))
2243 #else
2244 if ((nprot & PROT_EXEC) && dsp_mmap_allow_prot_exec < 1)
2245 #endif
2246 return (EINVAL);
2247
2248 /*
2249 * PROT_READ (alone) selects the input buffer.
2250 * PROT_WRITE (alone) selects the output buffer.
2251 * PROT_WRITE|PROT_READ together select the output buffer.
2252 */
2253 if ((nprot & (PROT_READ | PROT_WRITE)) == 0)
2254 return (EINVAL);
2255
2256 d = dsp_get_info(i_dev);
2257 if (PCM_DETACHING(d) || !DSP_REGISTERED(d, i_dev))
2258 return (EINVAL);
2259
2260 PCM_GIANT_ENTER(d);
2261
2262 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
2263
2264 c = ((nprot & PROT_WRITE) != 0) ? wrch : rdch;
2265 if (c == NULL || (c->flags & CHN_F_MMAP_INVALID) ||
2266 (*offset + size) > sndbuf_getsize(c->bufsoft) ||
2267 (wrch != NULL && (wrch->flags & CHN_F_MMAP_INVALID)) ||
2268 (rdch != NULL && (rdch->flags & CHN_F_MMAP_INVALID))) {
2269 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
2270 PCM_GIANT_EXIT(d);
2271 return (EINVAL);
2272 }
2273
2274 if (wrch != NULL)
2275 wrch->flags |= CHN_F_MMAP;
2276 if (rdch != NULL)
2277 rdch->flags |= CHN_F_MMAP;
2278
2279 *offset = (uintptr_t)sndbuf_getbufofs(c->bufsoft, *offset);
2280 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
2281 *object = vm_pager_allocate(OBJT_DEVICE, i_dev,
2282 size, nprot, *offset, curthread->td_ucred);
2283
2284 PCM_GIANT_LEAVE(d);
2285
2286 if (*object == NULL)
2287 return (EINVAL);
2288 return (0);
2289 }
2290
2291 /* So much for dev_stdclone() */
2292 static int
dsp_stdclone(char * name,char * namep,char * sep,int use_sep,int * u,int * c)2293 dsp_stdclone(char *name, char *namep, char *sep, int use_sep, int *u, int *c)
2294 {
2295 size_t len;
2296
2297 len = strlen(namep);
2298 if (strncmp(name, namep, len) != 0)
2299 return (ENODEV);
2300
2301 name += len;
2302
2303 if (isdigit(*name) == 0)
2304 return (ENODEV);
2305
2306 len = strlen(sep);
2307
2308 if (*name == '0' && !(name[1] == '\0' || bcmp(name + 1, sep, len) == 0))
2309 return (ENODEV);
2310
2311 for (*u = 0; isdigit(*name) != 0; name++) {
2312 *u *= 10;
2313 *u += *name - '0';
2314 if (*u > dsp_umax)
2315 return (ENODEV);
2316 }
2317
2318 if (*name == '\0')
2319 return ((use_sep == 0) ? 0 : ENODEV);
2320
2321 if (bcmp(name, sep, len) != 0 || isdigit(name[len]) == 0)
2322 return (ENODEV);
2323
2324 name += len;
2325
2326 if (*name == '0' && name[1] != '\0')
2327 return (ENODEV);
2328
2329 for (*c = 0; isdigit(*name) != 0; name++) {
2330 *c *= 10;
2331 *c += *name - '0';
2332 if (*c > dsp_cmax)
2333 return (ENODEV);
2334 }
2335
2336 if (*name != '\0')
2337 return (ENODEV);
2338
2339 return (0);
2340 }
2341
2342 static void
dsp_clone(void * arg,struct ucred * cred,char * name,int namelen,struct cdev ** dev)2343 dsp_clone(void *arg,
2344 struct ucred *cred,
2345 char *name, int namelen, struct cdev **dev)
2346 {
2347 struct snddev_info *d;
2348 struct snd_clone_entry *ce;
2349 struct pcm_channel *c;
2350 int i, unit, udcmask, cunit, devtype, devhw, devcmax, tumax;
2351 char *devname, *devcmp, *devsep;
2352
2353 KASSERT(dsp_umax >= 0 && dsp_cmax >= 0, ("Uninitialized unit!"));
2354
2355 if (*dev != NULL)
2356 return;
2357
2358 unit = -1;
2359 cunit = -1;
2360 devtype = -1;
2361 devhw = 0;
2362 devcmax = -1;
2363 tumax = -1;
2364 devname = NULL;
2365 devsep = NULL;
2366
2367 for (i = 0; unit == -1 &&
2368 i < (sizeof(dsp_cdevs) / sizeof(dsp_cdevs[0])); i++) {
2369 devtype = dsp_cdevs[i].type;
2370 devcmp = dsp_cdevs[i].name;
2371 devsep = dsp_cdevs[i].sep;
2372 devname = dsp_cdevs[i].alias;
2373 if (devname == NULL)
2374 devname = devcmp;
2375 devhw = dsp_cdevs[i].hw;
2376 devcmax = dsp_cdevs[i].max - 1;
2377 if (strcmp(name, devcmp) == 0) {
2378 if (dsp_basename_clone != 0)
2379 unit = snd_unit;
2380 } else if (dsp_stdclone(name, devcmp, devsep,
2381 dsp_cdevs[i].use_sep, &unit, &cunit) != 0) {
2382 unit = -1;
2383 cunit = -1;
2384 }
2385 }
2386
2387 d = devclass_get_softc(pcm_devclass, unit);
2388 if (!PCM_REGISTERED(d) || d->clones == NULL)
2389 return;
2390
2391 /* XXX Need Giant magic entry ??? */
2392
2393 PCM_LOCK(d);
2394 if (snd_clone_disabled(d->clones)) {
2395 PCM_UNLOCK(d);
2396 return;
2397 }
2398
2399 PCM_WAIT(d);
2400 PCM_ACQUIRE(d);
2401 PCM_UNLOCK(d);
2402
2403 udcmask = snd_u2unit(unit) | snd_d2unit(devtype);
2404
2405 if (devhw != 0) {
2406 KASSERT(devcmax <= dsp_cmax,
2407 ("overflow: devcmax=%d, dsp_cmax=%d", devcmax, dsp_cmax));
2408 if (cunit > devcmax) {
2409 PCM_RELEASE_QUICK(d);
2410 return;
2411 }
2412 udcmask |= snd_c2unit(cunit);
2413 CHN_FOREACH(c, d, channels.pcm) {
2414 CHN_LOCK(c);
2415 if (c->unit != udcmask) {
2416 CHN_UNLOCK(c);
2417 continue;
2418 }
2419 CHN_UNLOCK(c);
2420 udcmask &= ~snd_c2unit(cunit);
2421 /*
2422 * Temporarily increase clone maxunit to overcome
2423 * vchan flexibility.
2424 *
2425 * # sysctl dev.pcm.0.play.vchans=256
2426 * dev.pcm.0.play.vchans: 1 -> 256
2427 * # cat /dev/zero > /dev/dsp0.vp255 &
2428 * [1] 17296
2429 * # sysctl dev.pcm.0.play.vchans=0
2430 * dev.pcm.0.play.vchans: 256 -> 1
2431 * # fg
2432 * [1] + running cat /dev/zero > /dev/dsp0.vp255
2433 * ^C
2434 * # cat /dev/zero > /dev/dsp0.vp255
2435 * zsh: operation not supported: /dev/dsp0.vp255
2436 */
2437 tumax = snd_clone_getmaxunit(d->clones);
2438 if (cunit > tumax)
2439 snd_clone_setmaxunit(d->clones, cunit);
2440 else
2441 tumax = -1;
2442 goto dsp_clone_alloc;
2443 }
2444 /*
2445 * Ok, so we're requesting unallocated vchan, but still
2446 * within maximum vchan limit.
2447 */
2448 if (((devtype == SND_DEV_DSPHW_VPLAY && d->pvchancount > 0) ||
2449 (devtype == SND_DEV_DSPHW_VREC && d->rvchancount > 0)) &&
2450 cunit < snd_maxautovchans) {
2451 udcmask &= ~snd_c2unit(cunit);
2452 tumax = snd_clone_getmaxunit(d->clones);
2453 if (cunit > tumax)
2454 snd_clone_setmaxunit(d->clones, cunit);
2455 else
2456 tumax = -1;
2457 goto dsp_clone_alloc;
2458 }
2459 PCM_RELEASE_QUICK(d);
2460 return;
2461 }
2462
2463 dsp_clone_alloc:
2464 ce = snd_clone_alloc(d->clones, dev, &cunit, udcmask);
2465 if (tumax != -1)
2466 snd_clone_setmaxunit(d->clones, tumax);
2467 if (ce != NULL) {
2468 udcmask |= snd_c2unit(cunit);
2469 *dev = make_dev(&dsp_cdevsw, PCMMINOR(udcmask),
2470 UID_ROOT, GID_WHEEL, 0666, "%s%d%s%d",
2471 devname, unit, devsep, cunit);
2472 snd_clone_register(ce, *dev);
2473 }
2474
2475 PCM_RELEASE_QUICK(d);
2476
2477 if (*dev != NULL)
2478 dev_ref(*dev);
2479 }
2480
2481 static void
dsp_sysinit(void * p)2482 dsp_sysinit(void *p)
2483 {
2484 if (dsp_ehtag != NULL)
2485 return;
2486 /* initialize unit numbering */
2487 snd_unit_init();
2488 dsp_umax = PCMMAXUNIT;
2489 dsp_cmax = PCMMAXCHAN;
2490 dsp_ehtag = EVENTHANDLER_REGISTER(dev_clone, dsp_clone, 0, 1000);
2491 }
2492
2493 static void
dsp_sysuninit(void * p)2494 dsp_sysuninit(void *p)
2495 {
2496 if (dsp_ehtag == NULL)
2497 return;
2498 EVENTHANDLER_DEREGISTER(dev_clone, dsp_ehtag);
2499 dsp_ehtag = NULL;
2500 }
2501
2502 SYSINIT(dsp_sysinit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysinit, NULL);
2503 SYSUNINIT(dsp_sysuninit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysuninit, NULL);
2504
2505 char *
dsp_unit2name(char * buf,size_t len,int unit)2506 dsp_unit2name(char *buf, size_t len, int unit)
2507 {
2508 int i, dtype;
2509
2510 KASSERT(buf != NULL && len != 0,
2511 ("bogus buf=%p len=%ju", buf, (uintmax_t)len));
2512
2513 dtype = snd_unit2d(unit);
2514
2515 for (i = 0; i < (sizeof(dsp_cdevs) / sizeof(dsp_cdevs[0])); i++) {
2516 if (dtype != dsp_cdevs[i].type || dsp_cdevs[i].alias != NULL)
2517 continue;
2518 snprintf(buf, len, "%s%d%s%d", dsp_cdevs[i].name,
2519 snd_unit2u(unit), dsp_cdevs[i].sep, snd_unit2c(unit));
2520 return (buf);
2521 }
2522
2523 return (NULL);
2524 }
2525
2526 /**
2527 * @brief Handler for SNDCTL_AUDIOINFO.
2528 *
2529 * Gathers information about the audio device specified in ai->dev. If
2530 * ai->dev == -1, then this function gathers information about the current
2531 * device. If the call comes in on a non-audio device and ai->dev == -1,
2532 * return EINVAL.
2533 *
2534 * This routine is supposed to go practically straight to the hardware,
2535 * getting capabilities directly from the sound card driver, side-stepping
2536 * the intermediate channel interface.
2537 *
2538 * Note, however, that the usefulness of this command is significantly
2539 * decreased when requesting info about any device other than the one serving
2540 * the request. While each snddev_channel refers to a specific device node,
2541 * the converse is *not* true. Currently, when a sound device node is opened,
2542 * the sound subsystem scans for an available audio channel (or channels, if
2543 * opened in read+write) and then assigns them to the si_drv[12] private
2544 * data fields. As a result, any information returned linking a channel to
2545 * a specific character device isn't necessarily accurate.
2546 *
2547 * @note
2548 * Calling threads must not hold any snddev_info or pcm_channel locks.
2549 *
2550 * @param dev device on which the ioctl was issued
2551 * @param ai ioctl request data container
2552 *
2553 * @retval 0 success
2554 * @retval EINVAL ai->dev specifies an invalid device
2555 *
2556 * @todo Verify correctness of Doxygen tags. ;)
2557 */
2558 int
dsp_oss_audioinfo(struct cdev * i_dev,oss_audioinfo * ai)2559 dsp_oss_audioinfo(struct cdev *i_dev, oss_audioinfo *ai)
2560 {
2561 struct pcmchan_caps *caps;
2562 struct pcm_channel *ch;
2563 struct snddev_info *d;
2564 uint32_t fmts;
2565 int i, nchan, *rates, minch, maxch;
2566 char *devname, buf[CHN_NAMELEN];
2567
2568 /*
2569 * If probing the device that received the ioctl, make sure it's a
2570 * DSP device. (Users may use this ioctl with /dev/mixer and
2571 * /dev/midi.)
2572 */
2573 if (ai->dev == -1 && i_dev->si_devsw != &dsp_cdevsw)
2574 return (EINVAL);
2575
2576 ch = NULL;
2577 devname = NULL;
2578 nchan = 0;
2579 bzero(buf, sizeof(buf));
2580
2581 /*
2582 * Search for the requested audio device (channel). Start by
2583 * iterating over pcm devices.
2584 */
2585 for (i = 0; pcm_devclass != NULL &&
2586 i < devclass_get_maxunit(pcm_devclass); i++) {
2587 d = devclass_get_softc(pcm_devclass, i);
2588 if (!PCM_REGISTERED(d))
2589 continue;
2590
2591 /* XXX Need Giant magic entry ??? */
2592
2593 /* See the note in function docblock */
2594 PCM_UNLOCKASSERT(d);
2595 PCM_LOCK(d);
2596
2597 CHN_FOREACH(ch, d, channels.pcm) {
2598 CHN_UNLOCKASSERT(ch);
2599 CHN_LOCK(ch);
2600 if (ai->dev == -1) {
2601 if (DSP_REGISTERED(d, i_dev) &&
2602 (ch == PCM_RDCH(i_dev) || /* record ch */
2603 ch == PCM_WRCH(i_dev))) { /* playback ch */
2604 devname = dsp_unit2name(buf,
2605 sizeof(buf), ch->unit);
2606 }
2607 } else if (ai->dev == nchan) {
2608 devname = dsp_unit2name(buf, sizeof(buf),
2609 ch->unit);
2610 }
2611 if (devname != NULL)
2612 break;
2613 CHN_UNLOCK(ch);
2614 ++nchan;
2615 }
2616
2617 if (devname != NULL) {
2618 /*
2619 * At this point, the following synchronization stuff
2620 * has happened:
2621 * - a specific PCM device is locked.
2622 * - a specific audio channel has been locked, so be
2623 * sure to unlock when exiting;
2624 */
2625
2626 caps = chn_getcaps(ch);
2627
2628 /*
2629 * With all handles collected, zero out the user's
2630 * container and begin filling in its fields.
2631 */
2632 bzero((void *)ai, sizeof(oss_audioinfo));
2633
2634 ai->dev = nchan;
2635 strlcpy(ai->name, ch->name, sizeof(ai->name));
2636
2637 if ((ch->flags & CHN_F_BUSY) == 0)
2638 ai->busy = 0;
2639 else
2640 ai->busy = (ch->direction == PCMDIR_PLAY) ? OPEN_WRITE : OPEN_READ;
2641
2642 /**
2643 * @note
2644 * @c cmd - OSSv4 docs: "Only supported under Linux at
2645 * this moment." Cop-out, I know, but I'll save
2646 * running around in the process table for later.
2647 * Is there a risk of leaking information?
2648 */
2649 ai->pid = ch->pid;
2650
2651 /*
2652 * These flags stolen from SNDCTL_DSP_GETCAPS handler.
2653 * Note, however, that a single channel operates in
2654 * only one direction, so PCM_CAP_DUPLEX is out.
2655 */
2656 /**
2657 * @todo @c SNDCTL_AUDIOINFO::caps - Make drivers keep
2658 * these in pcmchan::caps?
2659 */
2660 ai->caps = PCM_CAP_REALTIME | PCM_CAP_MMAP | PCM_CAP_TRIGGER |
2661 ((ch->flags & CHN_F_VIRTUAL) ? PCM_CAP_VIRTUAL : 0) |
2662 ((ch->direction == PCMDIR_PLAY) ? PCM_CAP_OUTPUT : PCM_CAP_INPUT);
2663
2664 /*
2665 * Collect formats supported @b natively by the
2666 * device. Also determine min/max channels. (I.e.,
2667 * mono, stereo, or both?)
2668 *
2669 * If any channel is stereo, maxch = 2;
2670 * if all channels are stereo, minch = 2, too;
2671 * if any channel is mono, minch = 1;
2672 * and if all channels are mono, maxch = 1.
2673 */
2674 minch = 0;
2675 maxch = 0;
2676 fmts = 0;
2677 for (i = 0; caps->fmtlist[i]; i++) {
2678 fmts |= caps->fmtlist[i];
2679 if (AFMT_CHANNEL(caps->fmtlist[i]) > 1) {
2680 minch = (minch == 0) ? 2 : minch;
2681 maxch = 2;
2682 } else {
2683 minch = 1;
2684 maxch = (maxch == 0) ? 1 : maxch;
2685 }
2686 }
2687
2688 if (ch->direction == PCMDIR_PLAY)
2689 ai->oformats = fmts;
2690 else
2691 ai->iformats = fmts;
2692
2693 /**
2694 * @note
2695 * @c magic - OSSv4 docs: "Reserved for internal use
2696 * by OSS."
2697 *
2698 * @par
2699 * @c card_number - OSSv4 docs: "Number of the sound
2700 * card where this device belongs or -1 if this
2701 * information is not available. Applications
2702 * should normally not use this field for any
2703 * purpose."
2704 */
2705 ai->card_number = -1;
2706 /**
2707 * @todo @c song_name - depends first on
2708 * SNDCTL_[GS]ETSONG @todo @c label - depends
2709 * on SNDCTL_[GS]ETLABEL
2710 * @todo @c port_number - routing information?
2711 */
2712 ai->port_number = -1;
2713 ai->mixer_dev = (d->mixer_dev != NULL) ? PCMUNIT(d->mixer_dev) : -1;
2714 /**
2715 * @note
2716 * @c real_device - OSSv4 docs: "Obsolete."
2717 */
2718 ai->real_device = -1;
2719 strlcpy(ai->devnode, "/dev/", sizeof(ai->devnode));
2720 strlcat(ai->devnode, devname, sizeof(ai->devnode));
2721 ai->enabled = device_is_attached(d->dev) ? 1 : 0;
2722 /**
2723 * @note
2724 * @c flags - OSSv4 docs: "Reserved for future use."
2725 *
2726 * @note
2727 * @c binding - OSSv4 docs: "Reserved for future use."
2728 *
2729 * @todo @c handle - haven't decided how to generate
2730 * this yet; bus, vendor, device IDs?
2731 */
2732 ai->min_rate = caps->minspeed;
2733 ai->max_rate = caps->maxspeed;
2734
2735 ai->min_channels = minch;
2736 ai->max_channels = maxch;
2737
2738 ai->nrates = chn_getrates(ch, &rates);
2739 if (ai->nrates > OSS_MAX_SAMPLE_RATES)
2740 ai->nrates = OSS_MAX_SAMPLE_RATES;
2741
2742 for (i = 0; i < ai->nrates; i++)
2743 ai->rates[i] = rates[i];
2744
2745 ai->next_play_engine = 0;
2746 ai->next_rec_engine = 0;
2747
2748 CHN_UNLOCK(ch);
2749 }
2750
2751 PCM_UNLOCK(d);
2752
2753 if (devname != NULL)
2754 return (0);
2755 }
2756
2757 /* Exhausted the search -- nothing is locked, so return. */
2758 return (EINVAL);
2759 }
2760
2761 /**
2762 * @brief Assigns a PCM channel to a sync group.
2763 *
2764 * Sync groups are used to enable audio operations on multiple devices
2765 * simultaneously. They may be used with any number of devices and may
2766 * span across applications. Devices are added to groups with
2767 * the SNDCTL_DSP_SYNCGROUP ioctl, and operations are triggered with the
2768 * SNDCTL_DSP_SYNCSTART ioctl.
2769 *
2770 * If the @c id field of the @c group parameter is set to zero, then a new
2771 * sync group is created. Otherwise, wrch and rdch (if set) are added to
2772 * the group specified.
2773 *
2774 * @todo As far as memory allocation, should we assume that things are
2775 * okay and allocate with M_WAITOK before acquiring channel locks,
2776 * freeing later if not?
2777 *
2778 * @param wrch output channel associated w/ device (if any)
2779 * @param rdch input channel associated w/ device (if any)
2780 * @param group Sync group parameters
2781 *
2782 * @retval 0 success
2783 * @retval non-zero error to be propagated upstream
2784 */
2785 static int
dsp_oss_syncgroup(struct pcm_channel * wrch,struct pcm_channel * rdch,oss_syncgroup * group)2786 dsp_oss_syncgroup(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_syncgroup *group)
2787 {
2788 struct pcmchan_syncmember *smrd, *smwr;
2789 struct pcmchan_syncgroup *sg;
2790 int ret, sg_ids[3];
2791
2792 smrd = NULL;
2793 smwr = NULL;
2794 sg = NULL;
2795 ret = 0;
2796
2797 /*
2798 * Free_unr() may sleep, so store released syncgroup IDs until after
2799 * all locks are released.
2800 */
2801 sg_ids[0] = sg_ids[1] = sg_ids[2] = 0;
2802
2803 PCM_SG_LOCK();
2804
2805 /*
2806 * - Insert channel(s) into group's member list.
2807 * - Set CHN_F_NOTRIGGER on channel(s).
2808 * - Stop channel(s).
2809 */
2810
2811 /*
2812 * If device's channels are already mapped to a group, unmap them.
2813 */
2814 if (wrch) {
2815 CHN_LOCK(wrch);
2816 sg_ids[0] = chn_syncdestroy(wrch);
2817 }
2818
2819 if (rdch) {
2820 CHN_LOCK(rdch);
2821 sg_ids[1] = chn_syncdestroy(rdch);
2822 }
2823
2824 /*
2825 * Verify that mode matches character device properites.
2826 * - Bail if PCM_ENABLE_OUTPUT && wrch == NULL.
2827 * - Bail if PCM_ENABLE_INPUT && rdch == NULL.
2828 */
2829 if (((wrch == NULL) && (group->mode & PCM_ENABLE_OUTPUT)) ||
2830 ((rdch == NULL) && (group->mode & PCM_ENABLE_INPUT))) {
2831 ret = EINVAL;
2832 goto out;
2833 }
2834
2835 /*
2836 * An id of zero indicates the user wants to create a new
2837 * syncgroup.
2838 */
2839 if (group->id == 0) {
2840 sg = (struct pcmchan_syncgroup *)malloc(sizeof(*sg), M_DEVBUF, M_NOWAIT);
2841 if (sg != NULL) {
2842 SLIST_INIT(&sg->members);
2843 sg->id = alloc_unr(pcmsg_unrhdr);
2844
2845 group->id = sg->id;
2846 SLIST_INSERT_HEAD(&snd_pcm_syncgroups, sg, link);
2847 } else
2848 ret = ENOMEM;
2849 } else {
2850 SLIST_FOREACH(sg, &snd_pcm_syncgroups, link) {
2851 if (sg->id == group->id)
2852 break;
2853 }
2854 if (sg == NULL)
2855 ret = EINVAL;
2856 }
2857
2858 /* Couldn't create or find a syncgroup. Fail. */
2859 if (sg == NULL)
2860 goto out;
2861
2862 /*
2863 * Allocate a syncmember, assign it and a channel together, and
2864 * insert into syncgroup.
2865 */
2866 if (group->mode & PCM_ENABLE_INPUT) {
2867 smrd = (struct pcmchan_syncmember *)malloc(sizeof(*smrd), M_DEVBUF, M_NOWAIT);
2868 if (smrd == NULL) {
2869 ret = ENOMEM;
2870 goto out;
2871 }
2872
2873 SLIST_INSERT_HEAD(&sg->members, smrd, link);
2874 smrd->parent = sg;
2875 smrd->ch = rdch;
2876
2877 chn_abort(rdch);
2878 rdch->flags |= CHN_F_NOTRIGGER;
2879 rdch->sm = smrd;
2880 }
2881
2882 if (group->mode & PCM_ENABLE_OUTPUT) {
2883 smwr = (struct pcmchan_syncmember *)malloc(sizeof(*smwr), M_DEVBUF, M_NOWAIT);
2884 if (smwr == NULL) {
2885 ret = ENOMEM;
2886 goto out;
2887 }
2888
2889 SLIST_INSERT_HEAD(&sg->members, smwr, link);
2890 smwr->parent = sg;
2891 smwr->ch = wrch;
2892
2893 chn_abort(wrch);
2894 wrch->flags |= CHN_F_NOTRIGGER;
2895 wrch->sm = smwr;
2896 }
2897
2898
2899 out:
2900 if (ret != 0) {
2901 if (smrd != NULL)
2902 free(smrd, M_DEVBUF);
2903 if ((sg != NULL) && SLIST_EMPTY(&sg->members)) {
2904 sg_ids[2] = sg->id;
2905 SLIST_REMOVE(&snd_pcm_syncgroups, sg, pcmchan_syncgroup, link);
2906 free(sg, M_DEVBUF);
2907 }
2908
2909 if (wrch)
2910 wrch->sm = NULL;
2911 if (rdch)
2912 rdch->sm = NULL;
2913 }
2914
2915 if (wrch)
2916 CHN_UNLOCK(wrch);
2917 if (rdch)
2918 CHN_UNLOCK(rdch);
2919
2920 PCM_SG_UNLOCK();
2921
2922 if (sg_ids[0])
2923 free_unr(pcmsg_unrhdr, sg_ids[0]);
2924 if (sg_ids[1])
2925 free_unr(pcmsg_unrhdr, sg_ids[1]);
2926 if (sg_ids[2])
2927 free_unr(pcmsg_unrhdr, sg_ids[2]);
2928
2929 return (ret);
2930 }
2931
2932 /**
2933 * @brief Launch a sync group into action
2934 *
2935 * Sync groups are established via SNDCTL_DSP_SYNCGROUP. This function
2936 * iterates over all members, triggering them along the way.
2937 *
2938 * @note Caller must not hold any channel locks.
2939 *
2940 * @param sg_id sync group identifier
2941 *
2942 * @retval 0 success
2943 * @retval non-zero error worthy of propagating upstream to user
2944 */
2945 static int
dsp_oss_syncstart(int sg_id)2946 dsp_oss_syncstart(int sg_id)
2947 {
2948 struct pcmchan_syncmember *sm, *sm_tmp;
2949 struct pcmchan_syncgroup *sg;
2950 struct pcm_channel *c;
2951 int ret, needlocks;
2952
2953 /* Get the synclists lock */
2954 PCM_SG_LOCK();
2955
2956 do {
2957 ret = 0;
2958 needlocks = 0;
2959
2960 /* Search for syncgroup by ID */
2961 SLIST_FOREACH(sg, &snd_pcm_syncgroups, link) {
2962 if (sg->id == sg_id)
2963 break;
2964 }
2965
2966 /* Return EINVAL if not found */
2967 if (sg == NULL) {
2968 ret = EINVAL;
2969 break;
2970 }
2971
2972 /* Any removals resulting in an empty group should've handled this */
2973 KASSERT(!SLIST_EMPTY(&sg->members), ("found empty syncgroup"));
2974
2975 /*
2976 * Attempt to lock all member channels - if any are already
2977 * locked, unlock those acquired, sleep for a bit, and try
2978 * again.
2979 */
2980 SLIST_FOREACH(sm, &sg->members, link) {
2981 if (CHN_TRYLOCK(sm->ch) == 0) {
2982 int timo = hz * 5/1000;
2983 if (timo < 1)
2984 timo = 1;
2985
2986 /* Release all locked channels so far, retry */
2987 SLIST_FOREACH(sm_tmp, &sg->members, link) {
2988 /* sm is the member already locked */
2989 if (sm == sm_tmp)
2990 break;
2991 CHN_UNLOCK(sm_tmp->ch);
2992 }
2993
2994 /** @todo Is PRIBIO correct/ */
2995 ret = msleep(sm, &snd_pcm_syncgroups_mtx,
2996 PRIBIO | PCATCH, "pcmsg", timo);
2997 if (ret == EINTR || ret == ERESTART)
2998 break;
2999
3000 needlocks = 1;
3001 ret = 0; /* Assumes ret == EAGAIN... */
3002 }
3003 }
3004 } while (needlocks && ret == 0);
3005
3006 /* Proceed only if no errors encountered. */
3007 if (ret == 0) {
3008 /* Launch channels */
3009 while ((sm = SLIST_FIRST(&sg->members)) != NULL) {
3010 SLIST_REMOVE_HEAD(&sg->members, link);
3011
3012 c = sm->ch;
3013 c->sm = NULL;
3014 chn_start(c, 1);
3015 c->flags &= ~CHN_F_NOTRIGGER;
3016 CHN_UNLOCK(c);
3017
3018 free(sm, M_DEVBUF);
3019 }
3020
3021 SLIST_REMOVE(&snd_pcm_syncgroups, sg, pcmchan_syncgroup, link);
3022 free(sg, M_DEVBUF);
3023 }
3024
3025 PCM_SG_UNLOCK();
3026
3027 /*
3028 * Free_unr() may sleep, so be sure to give up the syncgroup lock
3029 * first.
3030 */
3031 if (ret == 0)
3032 free_unr(pcmsg_unrhdr, sg_id);
3033
3034 return (ret);
3035 }
3036
3037 /**
3038 * @brief Handler for SNDCTL_DSP_POLICY
3039 *
3040 * The SNDCTL_DSP_POLICY ioctl is a simpler interface to control fragment
3041 * size and count like with SNDCTL_DSP_SETFRAGMENT. Instead of the user
3042 * specifying those two parameters, s/he simply selects a number from 0..10
3043 * which corresponds to a buffer size. Smaller numbers request smaller
3044 * buffers with lower latencies (at greater overhead from more frequent
3045 * interrupts), while greater numbers behave in the opposite manner.
3046 *
3047 * The 4Front spec states that a value of 5 should be the default. However,
3048 * this implementation deviates slightly by using a linear scale without
3049 * consulting drivers. I.e., even though drivers may have different default
3050 * buffer sizes, a policy argument of 5 will have the same result across
3051 * all drivers.
3052 *
3053 * See http://manuals.opensound.com/developer/SNDCTL_DSP_POLICY.html for
3054 * more information.
3055 *
3056 * @todo When SNDCTL_DSP_COOKEDMODE is supported, it'll be necessary to
3057 * work with hardware drivers directly.
3058 *
3059 * @note PCM channel arguments must not be locked by caller.
3060 *
3061 * @param wrch Pointer to opened playback channel (optional; may be NULL)
3062 * @param rdch " recording channel (optional; may be NULL)
3063 * @param policy Integer from [0:10]
3064 *
3065 * @retval 0 constant (for now)
3066 */
3067 static int
dsp_oss_policy(struct pcm_channel * wrch,struct pcm_channel * rdch,int policy)3068 dsp_oss_policy(struct pcm_channel *wrch, struct pcm_channel *rdch, int policy)
3069 {
3070 int ret;
3071
3072 if (policy < CHN_POLICY_MIN || policy > CHN_POLICY_MAX)
3073 return (EIO);
3074
3075 /* Default: success */
3076 ret = 0;
3077
3078 if (rdch) {
3079 CHN_LOCK(rdch);
3080 ret = chn_setlatency(rdch, policy);
3081 CHN_UNLOCK(rdch);
3082 }
3083
3084 if (wrch && ret == 0) {
3085 CHN_LOCK(wrch);
3086 ret = chn_setlatency(wrch, policy);
3087 CHN_UNLOCK(wrch);
3088 }
3089
3090 if (ret)
3091 ret = EIO;
3092
3093 return (ret);
3094 }
3095
3096 /**
3097 * @brief Enable or disable "cooked" mode
3098 *
3099 * This is a handler for @c SNDCTL_DSP_COOKEDMODE. When in cooked mode, which
3100 * is the default, the sound system handles rate and format conversions
3101 * automatically (ex: user writing 11025Hz/8 bit/unsigned but card only
3102 * operates with 44100Hz/16bit/signed samples).
3103 *
3104 * Disabling cooked mode is intended for applications wanting to mmap()
3105 * a sound card's buffer space directly, bypassing the FreeBSD 2-stage
3106 * feeder architecture, presumably to gain as much control over audio
3107 * hardware as possible.
3108 *
3109 * See @c http://manuals.opensound.com/developer/SNDCTL_DSP_COOKEDMODE.html
3110 * for more details.
3111 *
3112 * @param wrch playback channel (optional; may be NULL)
3113 * @param rdch recording channel (optional; may be NULL)
3114 * @param enabled 0 = raw mode, 1 = cooked mode
3115 *
3116 * @retval EINVAL Operation not yet supported.
3117 */
3118 static int
dsp_oss_cookedmode(struct pcm_channel * wrch,struct pcm_channel * rdch,int enabled)3119 dsp_oss_cookedmode(struct pcm_channel *wrch, struct pcm_channel *rdch, int enabled)
3120 {
3121
3122 /*
3123 * XXX I just don't get it. Why don't they call it
3124 * "BITPERFECT" ~ SNDCTL_DSP_BITPERFECT !?!?.
3125 * This is just plain so confusing, incoherent,
3126 * <insert any non-printable characters here>.
3127 */
3128 if (!(enabled == 1 || enabled == 0))
3129 return (EINVAL);
3130
3131 /*
3132 * I won't give in. I'm inverting its logic here and now.
3133 * Brag all you want, but "BITPERFECT" should be the better
3134 * term here.
3135 */
3136 enabled ^= 0x00000001;
3137
3138 if (wrch != NULL) {
3139 CHN_LOCK(wrch);
3140 wrch->flags &= ~CHN_F_BITPERFECT;
3141 wrch->flags |= (enabled != 0) ? CHN_F_BITPERFECT : 0x00000000;
3142 CHN_UNLOCK(wrch);
3143 }
3144
3145 if (rdch != NULL) {
3146 CHN_LOCK(rdch);
3147 rdch->flags &= ~CHN_F_BITPERFECT;
3148 rdch->flags |= (enabled != 0) ? CHN_F_BITPERFECT : 0x00000000;
3149 CHN_UNLOCK(rdch);
3150 }
3151
3152 return (0);
3153 }
3154
3155 /**
3156 * @brief Retrieve channel interleaving order
3157 *
3158 * This is the handler for @c SNDCTL_DSP_GET_CHNORDER.
3159 *
3160 * See @c http://manuals.opensound.com/developer/SNDCTL_DSP_GET_CHNORDER.html
3161 * for more details.
3162 *
3163 * @note As the ioctl definition is still under construction, FreeBSD
3164 * does not currently support SNDCTL_DSP_GET_CHNORDER.
3165 *
3166 * @param wrch playback channel (optional; may be NULL)
3167 * @param rdch recording channel (optional; may be NULL)
3168 * @param map channel map (result will be stored there)
3169 *
3170 * @retval EINVAL Operation not yet supported.
3171 */
3172 static int
dsp_oss_getchnorder(struct pcm_channel * wrch,struct pcm_channel * rdch,unsigned long long * map)3173 dsp_oss_getchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map)
3174 {
3175 struct pcm_channel *ch;
3176 int ret;
3177
3178 ch = (wrch != NULL) ? wrch : rdch;
3179 if (ch != NULL) {
3180 CHN_LOCK(ch);
3181 ret = chn_oss_getorder(ch, map);
3182 CHN_UNLOCK(ch);
3183 } else
3184 ret = EINVAL;
3185
3186 return (ret);
3187 }
3188
3189 /**
3190 * @brief Specify channel interleaving order
3191 *
3192 * This is the handler for @c SNDCTL_DSP_SET_CHNORDER.
3193 *
3194 * @note As the ioctl definition is still under construction, FreeBSD
3195 * does not currently support @c SNDCTL_DSP_SET_CHNORDER.
3196 *
3197 * @param wrch playback channel (optional; may be NULL)
3198 * @param rdch recording channel (optional; may be NULL)
3199 * @param map channel map
3200 *
3201 * @retval EINVAL Operation not yet supported.
3202 */
3203 static int
dsp_oss_setchnorder(struct pcm_channel * wrch,struct pcm_channel * rdch,unsigned long long * map)3204 dsp_oss_setchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map)
3205 {
3206 int ret;
3207
3208 ret = 0;
3209
3210 if (wrch != NULL) {
3211 CHN_LOCK(wrch);
3212 ret = chn_oss_setorder(wrch, map);
3213 CHN_UNLOCK(wrch);
3214 }
3215
3216 if (ret == 0 && rdch != NULL) {
3217 CHN_LOCK(rdch);
3218 ret = chn_oss_setorder(rdch, map);
3219 CHN_UNLOCK(rdch);
3220 }
3221
3222 return (ret);
3223 }
3224
3225 static int
dsp_oss_getchannelmask(struct pcm_channel * wrch,struct pcm_channel * rdch,int * mask)3226 dsp_oss_getchannelmask(struct pcm_channel *wrch, struct pcm_channel *rdch,
3227 int *mask)
3228 {
3229 struct pcm_channel *ch;
3230 uint32_t chnmask;
3231 int ret;
3232
3233 chnmask = 0;
3234 ch = (wrch != NULL) ? wrch : rdch;
3235
3236 if (ch != NULL) {
3237 CHN_LOCK(ch);
3238 ret = chn_oss_getmask(ch, &chnmask);
3239 CHN_UNLOCK(ch);
3240 } else
3241 ret = EINVAL;
3242
3243 if (ret == 0)
3244 *mask = chnmask;
3245
3246 return (ret);
3247 }
3248
3249 #ifdef OSSV4_EXPERIMENT
3250 /**
3251 * @brief Retrieve an audio device's label
3252 *
3253 * This is a handler for the @c SNDCTL_GETLABEL ioctl.
3254 *
3255 * See @c http://manuals.opensound.com/developer/SNDCTL_GETLABEL.html
3256 * for more details.
3257 *
3258 * From Hannu@4Front: "For example ossxmix (just like some HW mixer
3259 * consoles) can show variable "labels" for certain controls. By default
3260 * the application name (say quake) is shown as the label but
3261 * applications may change the labels themselves."
3262 *
3263 * @note As the ioctl definition is still under construction, FreeBSD
3264 * does not currently support @c SNDCTL_GETLABEL.
3265 *
3266 * @param wrch playback channel (optional; may be NULL)
3267 * @param rdch recording channel (optional; may be NULL)
3268 * @param label label gets copied here
3269 *
3270 * @retval EINVAL Operation not yet supported.
3271 */
3272 static int
dsp_oss_getlabel(struct pcm_channel * wrch,struct pcm_channel * rdch,oss_label_t * label)3273 dsp_oss_getlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label)
3274 {
3275 return (EINVAL);
3276 }
3277
3278 /**
3279 * @brief Specify an audio device's label
3280 *
3281 * This is a handler for the @c SNDCTL_SETLABEL ioctl. Please see the
3282 * comments for @c dsp_oss_getlabel immediately above.
3283 *
3284 * See @c http://manuals.opensound.com/developer/SNDCTL_GETLABEL.html
3285 * for more details.
3286 *
3287 * @note As the ioctl definition is still under construction, FreeBSD
3288 * does not currently support SNDCTL_SETLABEL.
3289 *
3290 * @param wrch playback channel (optional; may be NULL)
3291 * @param rdch recording channel (optional; may be NULL)
3292 * @param label label gets copied from here
3293 *
3294 * @retval EINVAL Operation not yet supported.
3295 */
3296 static int
dsp_oss_setlabel(struct pcm_channel * wrch,struct pcm_channel * rdch,oss_label_t * label)3297 dsp_oss_setlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label)
3298 {
3299 return (EINVAL);
3300 }
3301
3302 /**
3303 * @brief Retrieve name of currently played song
3304 *
3305 * This is a handler for the @c SNDCTL_GETSONG ioctl. Audio players could
3306 * tell the system the name of the currently playing song, which would be
3307 * visible in @c /dev/sndstat.
3308 *
3309 * See @c http://manuals.opensound.com/developer/SNDCTL_GETSONG.html
3310 * for more details.
3311 *
3312 * @note As the ioctl definition is still under construction, FreeBSD
3313 * does not currently support SNDCTL_GETSONG.
3314 *
3315 * @param wrch playback channel (optional; may be NULL)
3316 * @param rdch recording channel (optional; may be NULL)
3317 * @param song song name gets copied here
3318 *
3319 * @retval EINVAL Operation not yet supported.
3320 */
3321 static int
dsp_oss_getsong(struct pcm_channel * wrch,struct pcm_channel * rdch,oss_longname_t * song)3322 dsp_oss_getsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song)
3323 {
3324 return (EINVAL);
3325 }
3326
3327 /**
3328 * @brief Retrieve name of currently played song
3329 *
3330 * This is a handler for the @c SNDCTL_SETSONG ioctl. Audio players could
3331 * tell the system the name of the currently playing song, which would be
3332 * visible in @c /dev/sndstat.
3333 *
3334 * See @c http://manuals.opensound.com/developer/SNDCTL_SETSONG.html
3335 * for more details.
3336 *
3337 * @note As the ioctl definition is still under construction, FreeBSD
3338 * does not currently support SNDCTL_SETSONG.
3339 *
3340 * @param wrch playback channel (optional; may be NULL)
3341 * @param rdch recording channel (optional; may be NULL)
3342 * @param song song name gets copied from here
3343 *
3344 * @retval EINVAL Operation not yet supported.
3345 */
3346 static int
dsp_oss_setsong(struct pcm_channel * wrch,struct pcm_channel * rdch,oss_longname_t * song)3347 dsp_oss_setsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song)
3348 {
3349 return (EINVAL);
3350 }
3351
3352 /**
3353 * @brief Rename a device
3354 *
3355 * This is a handler for the @c SNDCTL_SETNAME ioctl.
3356 *
3357 * See @c http://manuals.opensound.com/developer/SNDCTL_SETNAME.html for
3358 * more details.
3359 *
3360 * From Hannu@4Front: "This call is used to change the device name
3361 * reported in /dev/sndstat and ossinfo. So instead of using some generic
3362 * 'OSS loopback audio (MIDI) driver' the device may be given a meaningfull
3363 * name depending on the current context (for example 'OSS virtual wave table
3364 * synth' or 'VoIP link to London')."
3365 *
3366 * @note As the ioctl definition is still under construction, FreeBSD
3367 * does not currently support SNDCTL_SETNAME.
3368 *
3369 * @param wrch playback channel (optional; may be NULL)
3370 * @param rdch recording channel (optional; may be NULL)
3371 * @param name new device name gets copied from here
3372 *
3373 * @retval EINVAL Operation not yet supported.
3374 */
3375 static int
dsp_oss_setname(struct pcm_channel * wrch,struct pcm_channel * rdch,oss_longname_t * name)3376 dsp_oss_setname(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *name)
3377 {
3378 return (EINVAL);
3379 }
3380 #endif /* !OSSV4_EXPERIMENT */
3381