1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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 static int dsp_mmap_allow_prot_exec = 0; 47 SYSCTL_INT(_hw_snd, OID_AUTO, compat_linux_mmap, CTLFLAG_RWTUN, 48 &dsp_mmap_allow_prot_exec, 0, 49 "linux mmap compatibility (-1=force disable 0=auto 1=force enable)"); 50 51 static int dsp_basename_clone = 1; 52 SYSCTL_INT(_hw_snd, OID_AUTO, basename_clone, CTLFLAG_RWTUN, 53 &dsp_basename_clone, 0, 54 "DSP basename cloning (0: Disable; 1: Enabled)"); 55 56 struct dsp_cdevinfo { 57 struct pcm_channel *rdch, *wrch; 58 struct pcm_channel *volch; 59 int busy, simplex; 60 TAILQ_ENTRY(dsp_cdevinfo) link; 61 }; 62 63 #define PCM_RDCH(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->rdch) 64 #define PCM_WRCH(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->wrch) 65 #define PCM_VOLCH(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->volch) 66 #define PCM_SIMPLEX(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->simplex) 67 68 #define DSP_CDEVINFO_CACHESIZE 8 69 70 #define DSP_REGISTERED(x, y) (PCM_REGISTERED(x) && \ 71 (y) != NULL && (y)->si_drv1 != NULL) 72 73 #define OLDPCM_IOCTL 74 75 static d_open_t dsp_open; 76 static d_close_t dsp_close; 77 static d_read_t dsp_read; 78 static d_write_t dsp_write; 79 static d_ioctl_t dsp_ioctl; 80 static d_poll_t dsp_poll; 81 static d_mmap_t dsp_mmap; 82 static d_mmap_single_t dsp_mmap_single; 83 84 struct cdevsw dsp_cdevsw = { 85 .d_version = D_VERSION, 86 .d_open = dsp_open, 87 .d_close = dsp_close, 88 .d_read = dsp_read, 89 .d_write = dsp_write, 90 .d_ioctl = dsp_ioctl, 91 .d_poll = dsp_poll, 92 .d_mmap = dsp_mmap, 93 .d_mmap_single = dsp_mmap_single, 94 .d_name = "dsp", 95 }; 96 97 static eventhandler_tag dsp_ehtag = NULL; 98 static int dsp_umax = -1; 99 static int dsp_cmax = -1; 100 101 static int dsp_oss_syncgroup(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_syncgroup *group); 102 static int dsp_oss_syncstart(int sg_id); 103 static int dsp_oss_policy(struct pcm_channel *wrch, struct pcm_channel *rdch, int policy); 104 static int dsp_oss_cookedmode(struct pcm_channel *wrch, struct pcm_channel *rdch, int enabled); 105 static int dsp_oss_getchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map); 106 static int dsp_oss_setchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map); 107 static int dsp_oss_getchannelmask(struct pcm_channel *wrch, struct pcm_channel *rdch, int *mask); 108 #ifdef OSSV4_EXPERIMENT 109 static int dsp_oss_getlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label); 110 static int dsp_oss_setlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label); 111 static int dsp_oss_getsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song); 112 static int dsp_oss_setsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song); 113 static int dsp_oss_setname(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *name); 114 #endif 115 116 static struct snddev_info * 117 dsp_get_info(struct cdev *dev) 118 { 119 return (devclass_get_softc(pcm_devclass, PCMUNIT(dev))); 120 } 121 122 static uint32_t 123 dsp_get_flags(struct cdev *dev) 124 { 125 device_t bdev; 126 127 bdev = devclass_get_device(pcm_devclass, PCMUNIT(dev)); 128 129 return ((bdev != NULL) ? pcm_getflags(bdev) : 0xffffffff); 130 } 131 132 static void 133 dsp_set_flags(struct cdev *dev, uint32_t flags) 134 { 135 device_t bdev; 136 137 bdev = devclass_get_device(pcm_devclass, PCMUNIT(dev)); 138 139 if (bdev != NULL) 140 pcm_setflags(bdev, flags); 141 } 142 143 /* 144 * return the channels associated with an open device instance. 145 * lock channels specified. 146 */ 147 static int 148 getchns(struct cdev *dev, struct pcm_channel **rdch, struct pcm_channel **wrch, 149 uint32_t prio) 150 { 151 struct snddev_info *d; 152 struct pcm_channel *ch; 153 uint32_t flags; 154 155 if (PCM_SIMPLEX(dev) != 0) { 156 d = dsp_get_info(dev); 157 if (!PCM_REGISTERED(d)) 158 return (ENXIO); 159 PCM_LOCK(d); 160 PCM_WAIT(d); 161 PCM_ACQUIRE(d); 162 /* 163 * Note: order is important - 164 * pcm flags -> prio query flags -> wild guess 165 */ 166 ch = NULL; 167 flags = dsp_get_flags(dev); 168 if (flags & SD_F_PRIO_WR) { 169 ch = PCM_RDCH(dev); 170 PCM_RDCH(dev) = NULL; 171 } else if (flags & SD_F_PRIO_RD) { 172 ch = PCM_WRCH(dev); 173 PCM_WRCH(dev) = NULL; 174 } else if (prio & SD_F_PRIO_WR) { 175 ch = PCM_RDCH(dev); 176 PCM_RDCH(dev) = NULL; 177 flags |= SD_F_PRIO_WR; 178 } else if (prio & SD_F_PRIO_RD) { 179 ch = PCM_WRCH(dev); 180 PCM_WRCH(dev) = NULL; 181 flags |= SD_F_PRIO_RD; 182 } else if (PCM_WRCH(dev) != NULL) { 183 ch = PCM_RDCH(dev); 184 PCM_RDCH(dev) = NULL; 185 flags |= SD_F_PRIO_WR; 186 } else if (PCM_RDCH(dev) != NULL) { 187 ch = PCM_WRCH(dev); 188 PCM_WRCH(dev) = NULL; 189 flags |= SD_F_PRIO_RD; 190 } 191 PCM_SIMPLEX(dev) = 0; 192 dsp_set_flags(dev, flags); 193 if (ch != NULL) { 194 CHN_LOCK(ch); 195 pcm_chnref(ch, -1); 196 pcm_chnrelease(ch); 197 } 198 PCM_RELEASE(d); 199 PCM_UNLOCK(d); 200 } 201 202 *rdch = PCM_RDCH(dev); 203 *wrch = PCM_WRCH(dev); 204 205 if (*rdch != NULL && (prio & SD_F_PRIO_RD)) 206 CHN_LOCK(*rdch); 207 if (*wrch != NULL && (prio & SD_F_PRIO_WR)) 208 CHN_LOCK(*wrch); 209 210 return (0); 211 } 212 213 /* unlock specified channels */ 214 static void 215 relchns(struct cdev *dev, struct pcm_channel *rdch, struct pcm_channel *wrch, 216 uint32_t prio) 217 { 218 if (wrch != NULL && (prio & SD_F_PRIO_WR)) 219 CHN_UNLOCK(wrch); 220 if (rdch != NULL && (prio & SD_F_PRIO_RD)) 221 CHN_UNLOCK(rdch); 222 } 223 224 static void 225 dsp_cdevinfo_alloc(struct cdev *dev, 226 struct pcm_channel *rdch, struct pcm_channel *wrch, 227 struct pcm_channel *volch) 228 { 229 struct snddev_info *d; 230 struct dsp_cdevinfo *cdi; 231 int simplex; 232 233 d = dsp_get_info(dev); 234 235 KASSERT(PCM_REGISTERED(d) && dev != NULL && dev->si_drv1 == NULL && 236 ((rdch == NULL && wrch == NULL) || rdch != wrch), 237 ("bogus %s(), what are you trying to accomplish here?", __func__)); 238 PCM_BUSYASSERT(d); 239 PCM_LOCKASSERT(d); 240 241 simplex = (dsp_get_flags(dev) & SD_F_SIMPLEX) ? 1 : 0; 242 243 /* 244 * Scan for free instance entry and put it into the end of list. 245 * Create new one if necessary. 246 */ 247 TAILQ_FOREACH(cdi, &d->dsp_cdevinfo_pool, link) { 248 if (cdi->busy != 0) 249 break; 250 cdi->rdch = rdch; 251 cdi->wrch = wrch; 252 cdi->volch = volch; 253 cdi->simplex = simplex; 254 cdi->busy = 1; 255 TAILQ_REMOVE(&d->dsp_cdevinfo_pool, cdi, link); 256 TAILQ_INSERT_TAIL(&d->dsp_cdevinfo_pool, cdi, link); 257 dev->si_drv1 = cdi; 258 return; 259 } 260 PCM_UNLOCK(d); 261 cdi = malloc(sizeof(*cdi), M_DEVBUF, M_WAITOK | M_ZERO); 262 PCM_LOCK(d); 263 cdi->rdch = rdch; 264 cdi->wrch = wrch; 265 cdi->volch = volch; 266 cdi->simplex = simplex; 267 cdi->busy = 1; 268 TAILQ_INSERT_TAIL(&d->dsp_cdevinfo_pool, cdi, link); 269 dev->si_drv1 = cdi; 270 } 271 272 static void 273 dsp_cdevinfo_free(struct cdev *dev) 274 { 275 struct snddev_info *d; 276 struct dsp_cdevinfo *cdi, *tmp; 277 uint32_t flags; 278 int i; 279 280 d = dsp_get_info(dev); 281 282 KASSERT(PCM_REGISTERED(d) && dev != NULL && dev->si_drv1 != NULL && 283 PCM_RDCH(dev) == NULL && PCM_WRCH(dev) == NULL && 284 PCM_VOLCH(dev) == NULL, 285 ("bogus %s(), what are you trying to accomplish here?", __func__)); 286 PCM_BUSYASSERT(d); 287 PCM_LOCKASSERT(d); 288 289 cdi = dev->si_drv1; 290 dev->si_drv1 = NULL; 291 cdi->rdch = NULL; 292 cdi->wrch = NULL; 293 cdi->volch = NULL; 294 cdi->simplex = 0; 295 cdi->busy = 0; 296 297 /* 298 * Once it is free, move it back to the beginning of list for 299 * faster new entry allocation. 300 */ 301 TAILQ_REMOVE(&d->dsp_cdevinfo_pool, cdi, link); 302 TAILQ_INSERT_HEAD(&d->dsp_cdevinfo_pool, cdi, link); 303 304 /* 305 * Scan the list, cache free entries up to DSP_CDEVINFO_CACHESIZE. 306 * Reset simplex flags. 307 */ 308 flags = dsp_get_flags(dev) & ~SD_F_PRIO_SET; 309 i = DSP_CDEVINFO_CACHESIZE; 310 TAILQ_FOREACH_SAFE(cdi, &d->dsp_cdevinfo_pool, link, tmp) { 311 if (cdi->busy != 0) { 312 if (cdi->simplex == 0) { 313 if (cdi->rdch != NULL) 314 flags |= SD_F_PRIO_RD; 315 if (cdi->wrch != NULL) 316 flags |= SD_F_PRIO_WR; 317 } 318 } else { 319 if (i == 0) { 320 TAILQ_REMOVE(&d->dsp_cdevinfo_pool, cdi, link); 321 free(cdi, M_DEVBUF); 322 } else 323 i--; 324 } 325 } 326 dsp_set_flags(dev, flags); 327 } 328 329 void 330 dsp_cdevinfo_init(struct snddev_info *d) 331 { 332 struct dsp_cdevinfo *cdi; 333 int i; 334 335 KASSERT(d != NULL, ("NULL snddev_info")); 336 PCM_BUSYASSERT(d); 337 PCM_UNLOCKASSERT(d); 338 339 TAILQ_INIT(&d->dsp_cdevinfo_pool); 340 for (i = 0; i < DSP_CDEVINFO_CACHESIZE; i++) { 341 cdi = malloc(sizeof(*cdi), M_DEVBUF, M_WAITOK | M_ZERO); 342 TAILQ_INSERT_HEAD(&d->dsp_cdevinfo_pool, cdi, link); 343 } 344 } 345 346 void 347 dsp_cdevinfo_flush(struct snddev_info *d) 348 { 349 struct dsp_cdevinfo *cdi, *tmp; 350 351 KASSERT(d != NULL, ("NULL snddev_info")); 352 PCM_BUSYASSERT(d); 353 PCM_UNLOCKASSERT(d); 354 355 cdi = TAILQ_FIRST(&d->dsp_cdevinfo_pool); 356 while (cdi != NULL) { 357 tmp = TAILQ_NEXT(cdi, link); 358 free(cdi, M_DEVBUF); 359 cdi = tmp; 360 } 361 TAILQ_INIT(&d->dsp_cdevinfo_pool); 362 } 363 364 /* duplex / simplex cdev type */ 365 enum { 366 DSP_CDEV_TYPE_RDONLY, /* simplex read-only (record) */ 367 DSP_CDEV_TYPE_WRONLY, /* simplex write-only (play) */ 368 DSP_CDEV_TYPE_RDWR /* duplex read, write, or both */ 369 }; 370 371 enum { 372 DSP_CDEV_VOLCTL_NONE, 373 DSP_CDEV_VOLCTL_READ, 374 DSP_CDEV_VOLCTL_WRITE 375 }; 376 377 #define DSP_F_VALID(x) ((x) & (FREAD | FWRITE)) 378 #define DSP_F_DUPLEX(x) (((x) & (FREAD | FWRITE)) == (FREAD | FWRITE)) 379 #define DSP_F_SIMPLEX(x) (!DSP_F_DUPLEX(x)) 380 #define DSP_F_READ(x) ((x) & FREAD) 381 #define DSP_F_WRITE(x) ((x) & FWRITE) 382 383 static const struct { 384 int type; 385 char *name; 386 char *sep; 387 char *alias; 388 int use_sep; 389 int hw; 390 int max; 391 int volctl; 392 uint32_t fmt, spd; 393 int query; 394 } dsp_cdevs[] = { 395 { SND_DEV_DSP, "dsp", ".", NULL, 0, 0, 0, 0, 396 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED, 397 DSP_CDEV_TYPE_RDWR }, 398 { SND_DEV_AUDIO, "audio", ".", NULL, 0, 0, 0, 0, 399 SND_FORMAT(AFMT_MU_LAW, 1, 0), DSP_DEFAULT_SPEED, 400 DSP_CDEV_TYPE_RDWR }, 401 { SND_DEV_DSP16, "dspW", ".", NULL, 0, 0, 0, 0, 402 SND_FORMAT(AFMT_S16_LE, 1, 0), DSP_DEFAULT_SPEED, 403 DSP_CDEV_TYPE_RDWR }, 404 { SND_DEV_DSPHW_PLAY, "dsp", ".p", NULL, 1, 1, SND_MAXHWCHAN, 1, 405 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_WRONLY }, 406 { SND_DEV_DSPHW_VPLAY, "dsp", ".vp", NULL, 1, 1, SND_MAXVCHANS, 1, 407 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_WRONLY }, 408 { SND_DEV_DSPHW_REC, "dsp", ".r", NULL, 1, 1, SND_MAXHWCHAN, 1, 409 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_RDONLY }, 410 { SND_DEV_DSPHW_VREC, "dsp", ".vr", NULL, 1, 1, SND_MAXVCHANS, 1, 411 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_RDONLY }, 412 { SND_DEV_DSPHW_CD, "dspcd", ".", NULL, 0, 0, 0, 0, 413 SND_FORMAT(AFMT_S16_LE, 2, 0), 44100, DSP_CDEV_TYPE_RDWR }, 414 /* Low priority, OSSv4 aliases. */ 415 { SND_DEV_DSP, "dsp_ac3", ".", "dsp", 0, 0, 0, 0, 416 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED, 417 DSP_CDEV_TYPE_RDWR }, 418 { SND_DEV_DSP, "dsp_mmap", ".", "dsp", 0, 0, 0, 0, 419 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED, 420 DSP_CDEV_TYPE_RDWR }, 421 { SND_DEV_DSP, "dsp_multich", ".", "dsp", 0, 0, 0, 0, 422 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED, 423 DSP_CDEV_TYPE_RDWR }, 424 { SND_DEV_DSP, "dsp_spdifout", ".", "dsp", 0, 0, 0, 0, 425 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED, 426 DSP_CDEV_TYPE_RDWR }, 427 { SND_DEV_DSP, "dsp_spdifin", ".", "dsp", 0, 0, 0, 0, 428 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED, 429 DSP_CDEV_TYPE_RDWR }, 430 }; 431 432 #define DSP_FIXUP_ERROR() do { \ 433 prio = dsp_get_flags(i_dev); \ 434 if (!DSP_F_VALID(flags)) \ 435 error = EINVAL; \ 436 if (!DSP_F_DUPLEX(flags) && \ 437 ((DSP_F_READ(flags) && d->reccount == 0) || \ 438 (DSP_F_WRITE(flags) && d->playcount == 0))) \ 439 error = ENOTSUP; \ 440 else if (!DSP_F_DUPLEX(flags) && (prio & SD_F_SIMPLEX) && \ 441 ((DSP_F_READ(flags) && (prio & SD_F_PRIO_WR)) || \ 442 (DSP_F_WRITE(flags) && (prio & SD_F_PRIO_RD)))) \ 443 error = EBUSY; \ 444 else if (DSP_REGISTERED(d, i_dev)) \ 445 error = EBUSY; \ 446 } while (0) 447 448 static int 449 dsp_open(struct cdev *i_dev, int flags, int mode, struct thread *td) 450 { 451 struct pcm_channel *rdch, *wrch; 452 struct snddev_info *d; 453 uint32_t fmt, spd, prio, volctl; 454 int i, error, rderror, wrerror, devtype, wdevunit, rdevunit; 455 456 /* Kind of impossible.. */ 457 if (i_dev == NULL || td == NULL) 458 return (ENODEV); 459 460 d = dsp_get_info(i_dev); 461 if (PCM_DETACHING(d) || !PCM_REGISTERED(d)) 462 return (EBADF); 463 464 PCM_GIANT_ENTER(d); 465 466 /* Lock snddev so nobody else can monkey with it. */ 467 PCM_LOCK(d); 468 PCM_WAIT(d); 469 470 /* 471 * Try to acquire cloned device before someone else pick it. 472 * ENODEV means this is not a cloned droids. 473 */ 474 error = snd_clone_acquire(i_dev); 475 if (!(error == 0 || error == ENODEV)) { 476 DSP_FIXUP_ERROR(); 477 PCM_UNLOCK(d); 478 PCM_GIANT_EXIT(d); 479 return (error); 480 } 481 482 error = 0; 483 DSP_FIXUP_ERROR(); 484 485 if (error != 0) { 486 (void)snd_clone_release(i_dev); 487 PCM_UNLOCK(d); 488 PCM_GIANT_EXIT(d); 489 return (error); 490 } 491 492 /* 493 * That is just enough. Acquire and unlock pcm lock so 494 * the other will just have to wait until we finish doing 495 * everything. 496 */ 497 PCM_ACQUIRE(d); 498 PCM_UNLOCK(d); 499 500 devtype = PCMDEV(i_dev); 501 wdevunit = -1; 502 rdevunit = -1; 503 fmt = 0; 504 spd = 0; 505 volctl = DSP_CDEV_VOLCTL_NONE; 506 507 for (i = 0; i < (sizeof(dsp_cdevs) / sizeof(dsp_cdevs[0])); i++) { 508 if (devtype != dsp_cdevs[i].type || dsp_cdevs[i].alias != NULL) 509 continue; 510 /* 511 * Volume control only valid for DSPHW devices, 512 * and it must be opened in opposite direction be it 513 * simplex or duplex. Anything else will be handled 514 * as usual. 515 */ 516 if (dsp_cdevs[i].query == DSP_CDEV_TYPE_WRONLY) { 517 if (dsp_cdevs[i].volctl != 0 && 518 DSP_F_READ(flags)) { 519 volctl = DSP_CDEV_VOLCTL_WRITE; 520 flags &= ~FREAD; 521 flags |= FWRITE; 522 } 523 if (DSP_F_READ(flags)) { 524 (void)snd_clone_release(i_dev); 525 PCM_RELEASE_QUICK(d); 526 PCM_GIANT_EXIT(d); 527 return (ENOTSUP); 528 } 529 wdevunit = dev2unit(i_dev); 530 } else if (dsp_cdevs[i].query == DSP_CDEV_TYPE_RDONLY) { 531 if (dsp_cdevs[i].volctl != 0 && 532 DSP_F_WRITE(flags)) { 533 volctl = DSP_CDEV_VOLCTL_READ; 534 flags &= ~FWRITE; 535 flags |= FREAD; 536 } 537 if (DSP_F_WRITE(flags)) { 538 (void)snd_clone_release(i_dev); 539 PCM_RELEASE_QUICK(d); 540 PCM_GIANT_EXIT(d); 541 return (ENOTSUP); 542 } 543 rdevunit = dev2unit(i_dev); 544 } 545 fmt = dsp_cdevs[i].fmt; 546 spd = dsp_cdevs[i].spd; 547 break; 548 } 549 550 /* No matching devtype? */ 551 if (fmt == 0 || spd == 0) 552 panic("impossible devtype %d", devtype); 553 554 rdch = NULL; 555 wrch = NULL; 556 rderror = 0; 557 wrerror = 0; 558 559 /* 560 * if we get here, the open request is valid- either: 561 * * we were previously not open 562 * * we were open for play xor record and the opener wants 563 * the non-open direction 564 */ 565 if (DSP_F_READ(flags)) { 566 /* open for read */ 567 rderror = pcm_chnalloc(d, &rdch, PCMDIR_REC, 568 td->td_proc->p_pid, td->td_proc->p_comm, rdevunit); 569 570 if (rderror == 0 && chn_reset(rdch, fmt, spd) != 0) 571 rderror = ENXIO; 572 573 if (volctl == DSP_CDEV_VOLCTL_READ) 574 rderror = 0; 575 576 if (rderror != 0) { 577 if (rdch != NULL) 578 pcm_chnrelease(rdch); 579 if (!DSP_F_DUPLEX(flags)) { 580 (void)snd_clone_release(i_dev); 581 PCM_RELEASE_QUICK(d); 582 PCM_GIANT_EXIT(d); 583 return (rderror); 584 } 585 rdch = NULL; 586 } else if (volctl == DSP_CDEV_VOLCTL_READ) { 587 if (rdch != NULL) { 588 pcm_chnref(rdch, 1); 589 pcm_chnrelease(rdch); 590 } 591 } else { 592 if (flags & O_NONBLOCK) 593 rdch->flags |= CHN_F_NBIO; 594 if (flags & O_EXCL) 595 rdch->flags |= CHN_F_EXCLUSIVE; 596 pcm_chnref(rdch, 1); 597 if (volctl == DSP_CDEV_VOLCTL_NONE) 598 chn_vpc_reset(rdch, SND_VOL_C_PCM, 0); 599 CHN_UNLOCK(rdch); 600 } 601 } 602 603 if (DSP_F_WRITE(flags)) { 604 /* open for write */ 605 wrerror = pcm_chnalloc(d, &wrch, PCMDIR_PLAY, 606 td->td_proc->p_pid, td->td_proc->p_comm, wdevunit); 607 608 if (wrerror == 0 && chn_reset(wrch, fmt, spd) != 0) 609 wrerror = ENXIO; 610 611 if (volctl == DSP_CDEV_VOLCTL_WRITE) 612 wrerror = 0; 613 614 if (wrerror != 0) { 615 if (wrch != NULL) 616 pcm_chnrelease(wrch); 617 if (!DSP_F_DUPLEX(flags)) { 618 if (rdch != NULL) { 619 /* 620 * Lock, deref and release previously 621 * created record channel 622 */ 623 CHN_LOCK(rdch); 624 pcm_chnref(rdch, -1); 625 pcm_chnrelease(rdch); 626 } 627 (void)snd_clone_release(i_dev); 628 PCM_RELEASE_QUICK(d); 629 PCM_GIANT_EXIT(d); 630 return (wrerror); 631 } 632 wrch = NULL; 633 } else if (volctl == DSP_CDEV_VOLCTL_WRITE) { 634 if (wrch != NULL) { 635 pcm_chnref(wrch, 1); 636 pcm_chnrelease(wrch); 637 } 638 } else { 639 if (flags & O_NONBLOCK) 640 wrch->flags |= CHN_F_NBIO; 641 if (flags & O_EXCL) 642 wrch->flags |= CHN_F_EXCLUSIVE; 643 pcm_chnref(wrch, 1); 644 if (volctl == DSP_CDEV_VOLCTL_NONE) 645 chn_vpc_reset(wrch, SND_VOL_C_PCM, 0); 646 CHN_UNLOCK(wrch); 647 } 648 } 649 650 PCM_LOCK(d); 651 652 /* 653 * We're done. Allocate channels information for this cdev. 654 */ 655 switch (volctl) { 656 case DSP_CDEV_VOLCTL_READ: 657 KASSERT(wrch == NULL, ("wrch=%p not null!", wrch)); 658 dsp_cdevinfo_alloc(i_dev, NULL, NULL, rdch); 659 break; 660 case DSP_CDEV_VOLCTL_WRITE: 661 KASSERT(rdch == NULL, ("rdch=%p not null!", rdch)); 662 dsp_cdevinfo_alloc(i_dev, NULL, NULL, wrch); 663 break; 664 case DSP_CDEV_VOLCTL_NONE: 665 default: 666 if (wrch == NULL && rdch == NULL) { 667 (void)snd_clone_release(i_dev); 668 PCM_RELEASE(d); 669 PCM_UNLOCK(d); 670 PCM_GIANT_EXIT(d); 671 if (wrerror != 0) 672 return (wrerror); 673 if (rderror != 0) 674 return (rderror); 675 return (EINVAL); 676 } 677 dsp_cdevinfo_alloc(i_dev, rdch, wrch, NULL); 678 if (rdch != NULL) 679 CHN_INSERT_HEAD(d, rdch, channels.pcm.opened); 680 if (wrch != NULL) 681 CHN_INSERT_HEAD(d, wrch, channels.pcm.opened); 682 break; 683 } 684 685 /* 686 * Increase clone refcount for its automatic garbage collector. 687 */ 688 (void)snd_clone_ref(i_dev); 689 690 PCM_RELEASE(d); 691 PCM_UNLOCK(d); 692 693 PCM_GIANT_LEAVE(d); 694 695 return (0); 696 } 697 698 static int 699 dsp_close(struct cdev *i_dev, int flags, int mode, struct thread *td) 700 { 701 struct pcm_channel *rdch, *wrch, *volch; 702 struct snddev_info *d; 703 int sg_ids, rdref, wdref; 704 705 d = dsp_get_info(i_dev); 706 if (!DSP_REGISTERED(d, i_dev)) 707 return (EBADF); 708 709 PCM_GIANT_ENTER(d); 710 711 PCM_LOCK(d); 712 PCM_WAIT(d); 713 PCM_ACQUIRE(d); 714 715 rdch = PCM_RDCH(i_dev); 716 wrch = PCM_WRCH(i_dev); 717 volch = PCM_VOLCH(i_dev); 718 719 PCM_RDCH(i_dev) = NULL; 720 PCM_WRCH(i_dev) = NULL; 721 PCM_VOLCH(i_dev) = NULL; 722 723 rdref = -1; 724 wdref = -1; 725 726 if (volch != NULL) { 727 if (volch == rdch) 728 rdref--; 729 else if (volch == wrch) 730 wdref--; 731 else { 732 CHN_LOCK(volch); 733 pcm_chnref(volch, -1); 734 CHN_UNLOCK(volch); 735 } 736 } 737 738 if (rdch != NULL) 739 CHN_REMOVE(d, rdch, channels.pcm.opened); 740 if (wrch != NULL) 741 CHN_REMOVE(d, wrch, channels.pcm.opened); 742 743 if (rdch != NULL || wrch != NULL) { 744 PCM_UNLOCK(d); 745 if (rdch != NULL) { 746 /* 747 * The channel itself need not be locked because: 748 * a) Adding a channel to a syncgroup happens only 749 * in dsp_ioctl(), which cannot run concurrently 750 * to dsp_close(). 751 * b) The syncmember pointer (sm) is protected by 752 * the global syncgroup list lock. 753 * c) A channel can't just disappear, invalidating 754 * pointers, unless it's closed/dereferenced 755 * first. 756 */ 757 PCM_SG_LOCK(); 758 sg_ids = chn_syncdestroy(rdch); 759 PCM_SG_UNLOCK(); 760 if (sg_ids != 0) 761 free_unr(pcmsg_unrhdr, sg_ids); 762 763 CHN_LOCK(rdch); 764 pcm_chnref(rdch, rdref); 765 chn_abort(rdch); /* won't sleep */ 766 rdch->flags &= ~(CHN_F_RUNNING | CHN_F_MMAP | 767 CHN_F_DEAD | CHN_F_EXCLUSIVE); 768 chn_reset(rdch, 0, 0); 769 pcm_chnrelease(rdch); 770 } 771 if (wrch != NULL) { 772 /* 773 * Please see block above. 774 */ 775 PCM_SG_LOCK(); 776 sg_ids = chn_syncdestroy(wrch); 777 PCM_SG_UNLOCK(); 778 if (sg_ids != 0) 779 free_unr(pcmsg_unrhdr, sg_ids); 780 781 CHN_LOCK(wrch); 782 pcm_chnref(wrch, wdref); 783 chn_flush(wrch); /* may sleep */ 784 wrch->flags &= ~(CHN_F_RUNNING | CHN_F_MMAP | 785 CHN_F_DEAD | CHN_F_EXCLUSIVE); 786 chn_reset(wrch, 0, 0); 787 pcm_chnrelease(wrch); 788 } 789 PCM_LOCK(d); 790 } 791 792 dsp_cdevinfo_free(i_dev); 793 /* 794 * Release clone busy state and unref it so the automatic 795 * garbage collector will get the hint and do the remaining 796 * cleanup process. 797 */ 798 (void)snd_clone_release(i_dev); 799 800 /* 801 * destroy_dev() might sleep, so release pcm lock 802 * here and rely on pcm cv serialization. 803 */ 804 PCM_UNLOCK(d); 805 (void)snd_clone_unref(i_dev); 806 PCM_LOCK(d); 807 808 PCM_RELEASE(d); 809 PCM_UNLOCK(d); 810 811 PCM_GIANT_LEAVE(d); 812 813 return (0); 814 } 815 816 static __inline int 817 dsp_io_ops(struct cdev *i_dev, struct uio *buf) 818 { 819 struct snddev_info *d; 820 struct pcm_channel **ch, *rdch, *wrch; 821 int (*chn_io)(struct pcm_channel *, struct uio *); 822 int prio, ret; 823 pid_t runpid; 824 825 KASSERT(i_dev != NULL && buf != NULL && 826 (buf->uio_rw == UIO_READ || buf->uio_rw == UIO_WRITE), 827 ("%s(): io train wreck!", __func__)); 828 829 d = dsp_get_info(i_dev); 830 if (PCM_DETACHING(d) || !DSP_REGISTERED(d, i_dev)) 831 return (EBADF); 832 833 PCM_GIANT_ENTER(d); 834 835 switch (buf->uio_rw) { 836 case UIO_READ: 837 prio = SD_F_PRIO_RD; 838 ch = &rdch; 839 chn_io = chn_read; 840 break; 841 case UIO_WRITE: 842 prio = SD_F_PRIO_WR; 843 ch = &wrch; 844 chn_io = chn_write; 845 break; 846 default: 847 panic("invalid/corrupted uio direction: %d", buf->uio_rw); 848 break; 849 } 850 851 rdch = NULL; 852 wrch = NULL; 853 runpid = buf->uio_td->td_proc->p_pid; 854 855 getchns(i_dev, &rdch, &wrch, prio); 856 857 if (*ch == NULL || !((*ch)->flags & CHN_F_BUSY)) { 858 if (rdch != NULL || wrch != NULL) 859 relchns(i_dev, rdch, wrch, prio); 860 PCM_GIANT_EXIT(d); 861 return (EBADF); 862 } 863 864 if (((*ch)->flags & (CHN_F_MMAP | CHN_F_DEAD)) || 865 (((*ch)->flags & CHN_F_RUNNING) && (*ch)->pid != runpid)) { 866 relchns(i_dev, rdch, wrch, prio); 867 PCM_GIANT_EXIT(d); 868 return (EINVAL); 869 } else if (!((*ch)->flags & CHN_F_RUNNING)) { 870 (*ch)->flags |= CHN_F_RUNNING; 871 (*ch)->pid = runpid; 872 } 873 874 /* 875 * chn_read/write must give up channel lock in order to copy bytes 876 * from/to userland, so up the "in progress" counter to make sure 877 * someone else doesn't come along and muss up the buffer. 878 */ 879 ++(*ch)->inprog; 880 ret = chn_io(*ch, buf); 881 --(*ch)->inprog; 882 883 CHN_BROADCAST(&(*ch)->cv); 884 885 relchns(i_dev, rdch, wrch, prio); 886 887 PCM_GIANT_LEAVE(d); 888 889 return (ret); 890 } 891 892 static int 893 dsp_read(struct cdev *i_dev, struct uio *buf, int flag) 894 { 895 return (dsp_io_ops(i_dev, buf)); 896 } 897 898 static int 899 dsp_write(struct cdev *i_dev, struct uio *buf, int flag) 900 { 901 return (dsp_io_ops(i_dev, buf)); 902 } 903 904 static int 905 dsp_get_volume_channel(struct cdev *dev, struct pcm_channel **volch) 906 { 907 struct snddev_info *d; 908 struct pcm_channel *c; 909 int unit; 910 911 KASSERT(dev != NULL && volch != NULL, 912 ("%s(): NULL query dev=%p volch=%p", __func__, dev, volch)); 913 914 d = dsp_get_info(dev); 915 if (!PCM_REGISTERED(d)) { 916 *volch = NULL; 917 return (EINVAL); 918 } 919 920 PCM_UNLOCKASSERT(d); 921 922 *volch = NULL; 923 924 c = PCM_VOLCH(dev); 925 if (c != NULL) { 926 if (!(c->feederflags & (1 << FEEDER_VOLUME))) 927 return (-1); 928 *volch = c; 929 return (0); 930 } 931 932 PCM_LOCK(d); 933 PCM_WAIT(d); 934 PCM_ACQUIRE(d); 935 936 unit = dev2unit(dev); 937 938 CHN_FOREACH(c, d, channels.pcm) { 939 CHN_LOCK(c); 940 if (c->unit != unit) { 941 CHN_UNLOCK(c); 942 continue; 943 } 944 *volch = c; 945 pcm_chnref(c, 1); 946 PCM_VOLCH(dev) = c; 947 CHN_UNLOCK(c); 948 PCM_RELEASE(d); 949 PCM_UNLOCK(d); 950 return ((c->feederflags & (1 << FEEDER_VOLUME)) ? 0 : -1); 951 } 952 953 PCM_RELEASE(d); 954 PCM_UNLOCK(d); 955 956 return (EINVAL); 957 } 958 959 static int 960 dsp_ioctl_channel(struct cdev *dev, struct pcm_channel *volch, u_long cmd, 961 caddr_t arg) 962 { 963 struct snddev_info *d; 964 struct pcm_channel *rdch, *wrch; 965 int j, devtype, ret; 966 int left, right, center, mute; 967 968 d = dsp_get_info(dev); 969 if (!PCM_REGISTERED(d) || !(dsp_get_flags(dev) & SD_F_VPC)) 970 return (-1); 971 972 PCM_UNLOCKASSERT(d); 973 974 j = cmd & 0xff; 975 976 rdch = PCM_RDCH(dev); 977 wrch = PCM_WRCH(dev); 978 979 /* No specific channel, look into cache */ 980 if (volch == NULL) 981 volch = PCM_VOLCH(dev); 982 983 /* Look harder */ 984 if (volch == NULL) { 985 if (j == SOUND_MIXER_RECLEV && rdch != NULL) 986 volch = rdch; 987 else if (j == SOUND_MIXER_PCM && wrch != NULL) 988 volch = wrch; 989 } 990 991 devtype = PCMDEV(dev); 992 993 /* Look super harder */ 994 if (volch == NULL && 995 (devtype == SND_DEV_DSPHW_PLAY || devtype == SND_DEV_DSPHW_VPLAY || 996 devtype == SND_DEV_DSPHW_REC || devtype == SND_DEV_DSPHW_VREC)) { 997 ret = dsp_get_volume_channel(dev, &volch); 998 if (ret != 0) 999 return (ret); 1000 if (volch == NULL) 1001 return (EINVAL); 1002 } 1003 1004 /* Final validation */ 1005 if (volch == NULL) 1006 return (EINVAL); 1007 1008 CHN_LOCK(volch); 1009 if (!(volch->feederflags & (1 << FEEDER_VOLUME))) { 1010 CHN_UNLOCK(volch); 1011 return (EINVAL); 1012 } 1013 1014 switch (cmd & ~0xff) { 1015 case MIXER_WRITE(0): 1016 switch (j) { 1017 case SOUND_MIXER_MUTE: 1018 if (volch->direction == PCMDIR_REC) { 1019 chn_setmute_multi(volch, SND_VOL_C_PCM, (*(int *)arg & SOUND_MASK_RECLEV) != 0); 1020 } else { 1021 chn_setmute_multi(volch, SND_VOL_C_PCM, (*(int *)arg & SOUND_MASK_PCM) != 0); 1022 } 1023 break; 1024 case SOUND_MIXER_PCM: 1025 if (volch->direction != PCMDIR_PLAY) 1026 break; 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, 1031 left, right, center); 1032 break; 1033 case SOUND_MIXER_RECLEV: 1034 if (volch->direction != PCMDIR_REC) 1035 break; 1036 left = *(int *)arg & 0x7f; 1037 right = ((*(int *)arg) >> 8) & 0x7f; 1038 center = (left + right) >> 1; 1039 chn_setvolume_multi(volch, SND_VOL_C_PCM, 1040 left, right, center); 1041 break; 1042 default: 1043 /* ignore all other mixer writes */ 1044 break; 1045 } 1046 break; 1047 1048 case MIXER_READ(0): 1049 switch (j) { 1050 case SOUND_MIXER_MUTE: 1051 mute = CHN_GETMUTE(volch, SND_VOL_C_PCM, SND_CHN_T_FL) || 1052 CHN_GETMUTE(volch, SND_VOL_C_PCM, SND_CHN_T_FR); 1053 if (volch->direction == PCMDIR_REC) { 1054 *(int *)arg = mute << SOUND_MIXER_RECLEV; 1055 } else { 1056 *(int *)arg = mute << SOUND_MIXER_PCM; 1057 } 1058 break; 1059 case SOUND_MIXER_PCM: 1060 if (volch->direction != PCMDIR_PLAY) 1061 break; 1062 *(int *)arg = CHN_GETVOLUME(volch, 1063 SND_VOL_C_PCM, SND_CHN_T_FL); 1064 *(int *)arg |= CHN_GETVOLUME(volch, 1065 SND_VOL_C_PCM, SND_CHN_T_FR) << 8; 1066 break; 1067 case SOUND_MIXER_RECLEV: 1068 if (volch->direction != PCMDIR_REC) 1069 break; 1070 *(int *)arg = CHN_GETVOLUME(volch, 1071 SND_VOL_C_PCM, SND_CHN_T_FL); 1072 *(int *)arg |= CHN_GETVOLUME(volch, 1073 SND_VOL_C_PCM, SND_CHN_T_FR) << 8; 1074 break; 1075 case SOUND_MIXER_DEVMASK: 1076 case SOUND_MIXER_CAPS: 1077 case SOUND_MIXER_STEREODEVS: 1078 if (volch->direction == PCMDIR_REC) 1079 *(int *)arg = SOUND_MASK_RECLEV; 1080 else 1081 *(int *)arg = SOUND_MASK_PCM; 1082 break; 1083 default: 1084 *(int *)arg = 0; 1085 break; 1086 } 1087 break; 1088 1089 default: 1090 break; 1091 } 1092 CHN_UNLOCK(volch); 1093 return (0); 1094 } 1095 1096 static int 1097 dsp_ioctl(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode, 1098 struct thread *td) 1099 { 1100 struct pcm_channel *chn, *rdch, *wrch; 1101 struct snddev_info *d; 1102 u_long xcmd; 1103 int *arg_i, ret, tmp; 1104 1105 d = dsp_get_info(i_dev); 1106 if (PCM_DETACHING(d) || !DSP_REGISTERED(d, i_dev)) 1107 return (EBADF); 1108 1109 PCM_GIANT_ENTER(d); 1110 1111 arg_i = (int *)arg; 1112 ret = 0; 1113 xcmd = 0; 1114 chn = NULL; 1115 1116 if (IOCGROUP(cmd) == 'M') { 1117 if (cmd == OSS_GETVERSION) { 1118 *arg_i = SOUND_VERSION; 1119 PCM_GIANT_EXIT(d); 1120 return (0); 1121 } 1122 ret = dsp_ioctl_channel(i_dev, PCM_VOLCH(i_dev), cmd, arg); 1123 if (ret != -1) { 1124 PCM_GIANT_EXIT(d); 1125 return (ret); 1126 } 1127 1128 if (d->mixer_dev != NULL) { 1129 PCM_ACQUIRE_QUICK(d); 1130 ret = mixer_ioctl_cmd(d->mixer_dev, cmd, arg, -1, td, 1131 MIXER_CMD_DIRECT); 1132 PCM_RELEASE_QUICK(d); 1133 } else 1134 ret = EBADF; 1135 1136 PCM_GIANT_EXIT(d); 1137 1138 return (ret); 1139 } 1140 1141 /* 1142 * Certain ioctls may be made on any type of device (audio, mixer, 1143 * and MIDI). Handle those special cases here. 1144 */ 1145 if (IOCGROUP(cmd) == 'X') { 1146 PCM_ACQUIRE_QUICK(d); 1147 switch(cmd) { 1148 case SNDCTL_SYSINFO: 1149 sound_oss_sysinfo((oss_sysinfo *)arg); 1150 break; 1151 case SNDCTL_CARDINFO: 1152 ret = sound_oss_card_info((oss_card_info *)arg); 1153 break; 1154 case SNDCTL_AUDIOINFO: 1155 case SNDCTL_AUDIOINFO_EX: 1156 case SNDCTL_ENGINEINFO: 1157 ret = dsp_oss_audioinfo(i_dev, (oss_audioinfo *)arg); 1158 break; 1159 case SNDCTL_MIXERINFO: 1160 ret = mixer_oss_mixerinfo(i_dev, (oss_mixerinfo *)arg); 1161 break; 1162 default: 1163 ret = EINVAL; 1164 } 1165 PCM_RELEASE_QUICK(d); 1166 PCM_GIANT_EXIT(d); 1167 return (ret); 1168 } 1169 1170 getchns(i_dev, &rdch, &wrch, 0); 1171 1172 if (wrch != NULL && (wrch->flags & CHN_F_DEAD)) 1173 wrch = NULL; 1174 if (rdch != NULL && (rdch->flags & CHN_F_DEAD)) 1175 rdch = NULL; 1176 1177 if (wrch == NULL && rdch == NULL) { 1178 PCM_GIANT_EXIT(d); 1179 return (EINVAL); 1180 } 1181 1182 switch(cmd) { 1183 #ifdef OLDPCM_IOCTL 1184 /* 1185 * we start with the new ioctl interface. 1186 */ 1187 case AIONWRITE: /* how many bytes can write ? */ 1188 if (wrch) { 1189 CHN_LOCK(wrch); 1190 /* 1191 if (wrch && wrch->bufhard.dl) 1192 while (chn_wrfeed(wrch) == 0); 1193 */ 1194 *arg_i = sndbuf_getfree(wrch->bufsoft); 1195 CHN_UNLOCK(wrch); 1196 } else { 1197 *arg_i = 0; 1198 ret = EINVAL; 1199 } 1200 break; 1201 1202 case AIOSSIZE: /* set the current blocksize */ 1203 { 1204 struct snd_size *p = (struct snd_size *)arg; 1205 1206 p->play_size = 0; 1207 p->rec_size = 0; 1208 PCM_ACQUIRE_QUICK(d); 1209 if (wrch) { 1210 CHN_LOCK(wrch); 1211 chn_setblocksize(wrch, 2, p->play_size); 1212 p->play_size = sndbuf_getblksz(wrch->bufsoft); 1213 CHN_UNLOCK(wrch); 1214 } 1215 if (rdch) { 1216 CHN_LOCK(rdch); 1217 chn_setblocksize(rdch, 2, p->rec_size); 1218 p->rec_size = sndbuf_getblksz(rdch->bufsoft); 1219 CHN_UNLOCK(rdch); 1220 } 1221 PCM_RELEASE_QUICK(d); 1222 } 1223 break; 1224 case AIOGSIZE: /* get the current blocksize */ 1225 { 1226 struct snd_size *p = (struct snd_size *)arg; 1227 1228 if (wrch) { 1229 CHN_LOCK(wrch); 1230 p->play_size = sndbuf_getblksz(wrch->bufsoft); 1231 CHN_UNLOCK(wrch); 1232 } 1233 if (rdch) { 1234 CHN_LOCK(rdch); 1235 p->rec_size = sndbuf_getblksz(rdch->bufsoft); 1236 CHN_UNLOCK(rdch); 1237 } 1238 } 1239 break; 1240 1241 case AIOSFMT: 1242 case AIOGFMT: 1243 { 1244 snd_chan_param *p = (snd_chan_param *)arg; 1245 1246 if (cmd == AIOSFMT && 1247 ((p->play_format != 0 && p->play_rate == 0) || 1248 (p->rec_format != 0 && p->rec_rate == 0))) { 1249 ret = EINVAL; 1250 break; 1251 } 1252 PCM_ACQUIRE_QUICK(d); 1253 if (wrch) { 1254 CHN_LOCK(wrch); 1255 if (cmd == AIOSFMT && p->play_format != 0) { 1256 chn_setformat(wrch, 1257 SND_FORMAT(p->play_format, 1258 AFMT_CHANNEL(wrch->format), 1259 AFMT_EXTCHANNEL(wrch->format))); 1260 chn_setspeed(wrch, p->play_rate); 1261 } 1262 p->play_rate = wrch->speed; 1263 p->play_format = AFMT_ENCODING(wrch->format); 1264 CHN_UNLOCK(wrch); 1265 } else { 1266 p->play_rate = 0; 1267 p->play_format = 0; 1268 } 1269 if (rdch) { 1270 CHN_LOCK(rdch); 1271 if (cmd == AIOSFMT && p->rec_format != 0) { 1272 chn_setformat(rdch, 1273 SND_FORMAT(p->rec_format, 1274 AFMT_CHANNEL(rdch->format), 1275 AFMT_EXTCHANNEL(rdch->format))); 1276 chn_setspeed(rdch, p->rec_rate); 1277 } 1278 p->rec_rate = rdch->speed; 1279 p->rec_format = AFMT_ENCODING(rdch->format); 1280 CHN_UNLOCK(rdch); 1281 } else { 1282 p->rec_rate = 0; 1283 p->rec_format = 0; 1284 } 1285 PCM_RELEASE_QUICK(d); 1286 } 1287 break; 1288 1289 case AIOGCAP: /* get capabilities */ 1290 { 1291 snd_capabilities *p = (snd_capabilities *)arg; 1292 struct pcmchan_caps *pcaps = NULL, *rcaps = NULL; 1293 struct cdev *pdev; 1294 1295 PCM_LOCK(d); 1296 if (rdch) { 1297 CHN_LOCK(rdch); 1298 rcaps = chn_getcaps(rdch); 1299 } 1300 if (wrch) { 1301 CHN_LOCK(wrch); 1302 pcaps = chn_getcaps(wrch); 1303 } 1304 p->rate_min = max(rcaps? rcaps->minspeed : 0, 1305 pcaps? pcaps->minspeed : 0); 1306 p->rate_max = min(rcaps? rcaps->maxspeed : 1000000, 1307 pcaps? pcaps->maxspeed : 1000000); 1308 p->bufsize = min(rdch? sndbuf_getsize(rdch->bufsoft) : 1000000, 1309 wrch? sndbuf_getsize(wrch->bufsoft) : 1000000); 1310 /* XXX bad on sb16 */ 1311 p->formats = (rdch? chn_getformats(rdch) : 0xffffffff) & 1312 (wrch? chn_getformats(wrch) : 0xffffffff); 1313 if (rdch && wrch) 1314 p->formats |= (dsp_get_flags(i_dev) & SD_F_SIMPLEX)? 0 : AFMT_FULLDUPLEX; 1315 pdev = d->mixer_dev; 1316 p->mixers = 1; /* default: one mixer */ 1317 p->inputs = pdev->si_drv1? mix_getdevs(pdev->si_drv1) : 0; 1318 p->left = p->right = 100; 1319 if (wrch) 1320 CHN_UNLOCK(wrch); 1321 if (rdch) 1322 CHN_UNLOCK(rdch); 1323 PCM_UNLOCK(d); 1324 } 1325 break; 1326 1327 case AIOSTOP: 1328 if (*arg_i == AIOSYNC_PLAY && wrch) { 1329 CHN_LOCK(wrch); 1330 *arg_i = chn_abort(wrch); 1331 CHN_UNLOCK(wrch); 1332 } else if (*arg_i == AIOSYNC_CAPTURE && rdch) { 1333 CHN_LOCK(rdch); 1334 *arg_i = chn_abort(rdch); 1335 CHN_UNLOCK(rdch); 1336 } else { 1337 printf("AIOSTOP: bad channel 0x%x\n", *arg_i); 1338 *arg_i = 0; 1339 } 1340 break; 1341 1342 case AIOSYNC: 1343 printf("AIOSYNC chan 0x%03lx pos %lu unimplemented\n", 1344 ((snd_sync_parm *)arg)->chan, ((snd_sync_parm *)arg)->pos); 1345 break; 1346 #endif 1347 /* 1348 * here follow the standard ioctls (filio.h etc.) 1349 */ 1350 case FIONREAD: /* get # bytes to read */ 1351 if (rdch) { 1352 CHN_LOCK(rdch); 1353 /* if (rdch && rdch->bufhard.dl) 1354 while (chn_rdfeed(rdch) == 0); 1355 */ 1356 *arg_i = sndbuf_getready(rdch->bufsoft); 1357 CHN_UNLOCK(rdch); 1358 } else { 1359 *arg_i = 0; 1360 ret = EINVAL; 1361 } 1362 break; 1363 1364 case FIOASYNC: /*set/clear async i/o */ 1365 DEB( printf("FIOASYNC\n") ; ) 1366 break; 1367 1368 case SNDCTL_DSP_NONBLOCK: /* set non-blocking i/o */ 1369 case FIONBIO: /* set/clear non-blocking i/o */ 1370 if (rdch) { 1371 CHN_LOCK(rdch); 1372 if (cmd == SNDCTL_DSP_NONBLOCK || *arg_i) 1373 rdch->flags |= CHN_F_NBIO; 1374 else 1375 rdch->flags &= ~CHN_F_NBIO; 1376 CHN_UNLOCK(rdch); 1377 } 1378 if (wrch) { 1379 CHN_LOCK(wrch); 1380 if (cmd == SNDCTL_DSP_NONBLOCK || *arg_i) 1381 wrch->flags |= CHN_F_NBIO; 1382 else 1383 wrch->flags &= ~CHN_F_NBIO; 1384 CHN_UNLOCK(wrch); 1385 } 1386 break; 1387 1388 /* 1389 * Finally, here is the linux-compatible ioctl interface 1390 */ 1391 #define THE_REAL_SNDCTL_DSP_GETBLKSIZE _IOWR('P', 4, int) 1392 case THE_REAL_SNDCTL_DSP_GETBLKSIZE: 1393 case SNDCTL_DSP_GETBLKSIZE: 1394 chn = wrch ? wrch : rdch; 1395 if (chn) { 1396 CHN_LOCK(chn); 1397 *arg_i = sndbuf_getblksz(chn->bufsoft); 1398 CHN_UNLOCK(chn); 1399 } else { 1400 *arg_i = 0; 1401 ret = EINVAL; 1402 } 1403 break; 1404 1405 case SNDCTL_DSP_SETBLKSIZE: 1406 RANGE(*arg_i, 16, 65536); 1407 PCM_ACQUIRE_QUICK(d); 1408 if (wrch) { 1409 CHN_LOCK(wrch); 1410 chn_setblocksize(wrch, 2, *arg_i); 1411 CHN_UNLOCK(wrch); 1412 } 1413 if (rdch) { 1414 CHN_LOCK(rdch); 1415 chn_setblocksize(rdch, 2, *arg_i); 1416 CHN_UNLOCK(rdch); 1417 } 1418 PCM_RELEASE_QUICK(d); 1419 break; 1420 1421 case SNDCTL_DSP_RESET: 1422 DEB(printf("dsp reset\n")); 1423 if (wrch) { 1424 CHN_LOCK(wrch); 1425 chn_abort(wrch); 1426 chn_resetbuf(wrch); 1427 CHN_UNLOCK(wrch); 1428 } 1429 if (rdch) { 1430 CHN_LOCK(rdch); 1431 chn_abort(rdch); 1432 chn_resetbuf(rdch); 1433 CHN_UNLOCK(rdch); 1434 } 1435 break; 1436 1437 case SNDCTL_DSP_SYNC: 1438 DEB(printf("dsp sync\n")); 1439 /* chn_sync may sleep */ 1440 if (wrch) { 1441 CHN_LOCK(wrch); 1442 chn_sync(wrch, 0); 1443 CHN_UNLOCK(wrch); 1444 } 1445 break; 1446 1447 case SNDCTL_DSP_SPEED: 1448 /* chn_setspeed may sleep */ 1449 tmp = 0; 1450 PCM_ACQUIRE_QUICK(d); 1451 if (wrch) { 1452 CHN_LOCK(wrch); 1453 ret = chn_setspeed(wrch, *arg_i); 1454 tmp = wrch->speed; 1455 CHN_UNLOCK(wrch); 1456 } 1457 if (rdch && ret == 0) { 1458 CHN_LOCK(rdch); 1459 ret = chn_setspeed(rdch, *arg_i); 1460 if (tmp == 0) 1461 tmp = rdch->speed; 1462 CHN_UNLOCK(rdch); 1463 } 1464 PCM_RELEASE_QUICK(d); 1465 *arg_i = tmp; 1466 break; 1467 1468 case SOUND_PCM_READ_RATE: 1469 chn = wrch ? wrch : rdch; 1470 if (chn) { 1471 CHN_LOCK(chn); 1472 *arg_i = chn->speed; 1473 CHN_UNLOCK(chn); 1474 } else { 1475 *arg_i = 0; 1476 ret = EINVAL; 1477 } 1478 break; 1479 1480 case SNDCTL_DSP_STEREO: 1481 tmp = -1; 1482 *arg_i = (*arg_i)? 2 : 1; 1483 PCM_ACQUIRE_QUICK(d); 1484 if (wrch) { 1485 CHN_LOCK(wrch); 1486 ret = chn_setformat(wrch, 1487 SND_FORMAT(wrch->format, *arg_i, 0)); 1488 tmp = (AFMT_CHANNEL(wrch->format) > 1)? 1 : 0; 1489 CHN_UNLOCK(wrch); 1490 } 1491 if (rdch && ret == 0) { 1492 CHN_LOCK(rdch); 1493 ret = chn_setformat(rdch, 1494 SND_FORMAT(rdch->format, *arg_i, 0)); 1495 if (tmp == -1) 1496 tmp = (AFMT_CHANNEL(rdch->format) > 1)? 1 : 0; 1497 CHN_UNLOCK(rdch); 1498 } 1499 PCM_RELEASE_QUICK(d); 1500 *arg_i = tmp; 1501 break; 1502 1503 case SOUND_PCM_WRITE_CHANNELS: 1504 /* case SNDCTL_DSP_CHANNELS: ( == SOUND_PCM_WRITE_CHANNELS) */ 1505 if (*arg_i < 0 || *arg_i > AFMT_CHANNEL_MAX) { 1506 *arg_i = 0; 1507 ret = EINVAL; 1508 break; 1509 } 1510 if (*arg_i != 0) { 1511 uint32_t ext = 0; 1512 1513 tmp = 0; 1514 /* 1515 * Map channel number to surround sound formats. 1516 * Devices that need bitperfect mode to operate 1517 * (e.g. more than SND_CHN_MAX channels) are not 1518 * subject to any mapping. 1519 */ 1520 if (!(dsp_get_flags(i_dev) & SD_F_BITPERFECT)) { 1521 struct pcmchan_matrix *m; 1522 1523 if (*arg_i > SND_CHN_MAX) 1524 *arg_i = SND_CHN_MAX; 1525 1526 m = feeder_matrix_default_channel_map(*arg_i); 1527 if (m != NULL) 1528 ext = m->ext; 1529 } 1530 1531 PCM_ACQUIRE_QUICK(d); 1532 if (wrch) { 1533 CHN_LOCK(wrch); 1534 ret = chn_setformat(wrch, 1535 SND_FORMAT(wrch->format, *arg_i, ext)); 1536 tmp = AFMT_CHANNEL(wrch->format); 1537 CHN_UNLOCK(wrch); 1538 } 1539 if (rdch && ret == 0) { 1540 CHN_LOCK(rdch); 1541 ret = chn_setformat(rdch, 1542 SND_FORMAT(rdch->format, *arg_i, ext)); 1543 if (tmp == 0) 1544 tmp = AFMT_CHANNEL(rdch->format); 1545 CHN_UNLOCK(rdch); 1546 } 1547 PCM_RELEASE_QUICK(d); 1548 *arg_i = tmp; 1549 } else { 1550 chn = wrch ? wrch : rdch; 1551 CHN_LOCK(chn); 1552 *arg_i = AFMT_CHANNEL(chn->format); 1553 CHN_UNLOCK(chn); 1554 } 1555 break; 1556 1557 case SOUND_PCM_READ_CHANNELS: 1558 chn = wrch ? wrch : rdch; 1559 if (chn) { 1560 CHN_LOCK(chn); 1561 *arg_i = AFMT_CHANNEL(chn->format); 1562 CHN_UNLOCK(chn); 1563 } else { 1564 *arg_i = 0; 1565 ret = EINVAL; 1566 } 1567 break; 1568 1569 case SNDCTL_DSP_GETFMTS: /* returns a mask of supported fmts */ 1570 chn = wrch ? wrch : rdch; 1571 if (chn) { 1572 CHN_LOCK(chn); 1573 *arg_i = chn_getformats(chn); 1574 CHN_UNLOCK(chn); 1575 } else { 1576 *arg_i = 0; 1577 ret = EINVAL; 1578 } 1579 break; 1580 1581 case SNDCTL_DSP_SETFMT: /* sets _one_ format */ 1582 if (*arg_i != AFMT_QUERY) { 1583 tmp = 0; 1584 PCM_ACQUIRE_QUICK(d); 1585 if (wrch) { 1586 CHN_LOCK(wrch); 1587 ret = chn_setformat(wrch, SND_FORMAT(*arg_i, 1588 AFMT_CHANNEL(wrch->format), 1589 AFMT_EXTCHANNEL(wrch->format))); 1590 tmp = wrch->format; 1591 CHN_UNLOCK(wrch); 1592 } 1593 if (rdch && ret == 0) { 1594 CHN_LOCK(rdch); 1595 ret = chn_setformat(rdch, SND_FORMAT(*arg_i, 1596 AFMT_CHANNEL(rdch->format), 1597 AFMT_EXTCHANNEL(rdch->format))); 1598 if (tmp == 0) 1599 tmp = rdch->format; 1600 CHN_UNLOCK(rdch); 1601 } 1602 PCM_RELEASE_QUICK(d); 1603 *arg_i = AFMT_ENCODING(tmp); 1604 } else { 1605 chn = wrch ? wrch : rdch; 1606 CHN_LOCK(chn); 1607 *arg_i = AFMT_ENCODING(chn->format); 1608 CHN_UNLOCK(chn); 1609 } 1610 break; 1611 1612 case SNDCTL_DSP_SETFRAGMENT: 1613 DEB(printf("SNDCTL_DSP_SETFRAGMENT 0x%08x\n", *(int *)arg)); 1614 { 1615 uint32_t fragln = (*arg_i) & 0x0000ffff; 1616 uint32_t maxfrags = ((*arg_i) & 0xffff0000) >> 16; 1617 uint32_t fragsz; 1618 uint32_t r_maxfrags, r_fragsz; 1619 1620 RANGE(fragln, 4, 16); 1621 fragsz = 1 << fragln; 1622 1623 if (maxfrags == 0) 1624 maxfrags = CHN_2NDBUFMAXSIZE / fragsz; 1625 if (maxfrags < 2) 1626 maxfrags = 2; 1627 if (maxfrags * fragsz > CHN_2NDBUFMAXSIZE) 1628 maxfrags = CHN_2NDBUFMAXSIZE / fragsz; 1629 1630 DEB(printf("SNDCTL_DSP_SETFRAGMENT %d frags, %d sz\n", maxfrags, fragsz)); 1631 PCM_ACQUIRE_QUICK(d); 1632 if (rdch) { 1633 CHN_LOCK(rdch); 1634 ret = chn_setblocksize(rdch, maxfrags, fragsz); 1635 r_maxfrags = sndbuf_getblkcnt(rdch->bufsoft); 1636 r_fragsz = sndbuf_getblksz(rdch->bufsoft); 1637 CHN_UNLOCK(rdch); 1638 } else { 1639 r_maxfrags = maxfrags; 1640 r_fragsz = fragsz; 1641 } 1642 if (wrch && ret == 0) { 1643 CHN_LOCK(wrch); 1644 ret = chn_setblocksize(wrch, maxfrags, fragsz); 1645 maxfrags = sndbuf_getblkcnt(wrch->bufsoft); 1646 fragsz = sndbuf_getblksz(wrch->bufsoft); 1647 CHN_UNLOCK(wrch); 1648 } else { /* use whatever came from the read channel */ 1649 maxfrags = r_maxfrags; 1650 fragsz = r_fragsz; 1651 } 1652 PCM_RELEASE_QUICK(d); 1653 1654 fragln = 0; 1655 while (fragsz > 1) { 1656 fragln++; 1657 fragsz >>= 1; 1658 } 1659 *arg_i = (maxfrags << 16) | fragln; 1660 } 1661 break; 1662 1663 case SNDCTL_DSP_GETISPACE: 1664 /* return the size of data available in the input queue */ 1665 { 1666 audio_buf_info *a = (audio_buf_info *)arg; 1667 if (rdch) { 1668 struct snd_dbuf *bs = rdch->bufsoft; 1669 1670 CHN_LOCK(rdch); 1671 a->bytes = sndbuf_getready(bs); 1672 a->fragments = a->bytes / sndbuf_getblksz(bs); 1673 a->fragstotal = sndbuf_getblkcnt(bs); 1674 a->fragsize = sndbuf_getblksz(bs); 1675 CHN_UNLOCK(rdch); 1676 } else 1677 ret = EINVAL; 1678 } 1679 break; 1680 1681 case SNDCTL_DSP_GETOSPACE: 1682 /* return space available in the output queue */ 1683 { 1684 audio_buf_info *a = (audio_buf_info *)arg; 1685 if (wrch) { 1686 struct snd_dbuf *bs = wrch->bufsoft; 1687 1688 CHN_LOCK(wrch); 1689 /* XXX abusive DMA update: chn_wrupdate(wrch); */ 1690 a->bytes = sndbuf_getfree(bs); 1691 a->fragments = a->bytes / sndbuf_getblksz(bs); 1692 a->fragstotal = sndbuf_getblkcnt(bs); 1693 a->fragsize = sndbuf_getblksz(bs); 1694 CHN_UNLOCK(wrch); 1695 } else 1696 ret = EINVAL; 1697 } 1698 break; 1699 1700 case SNDCTL_DSP_GETIPTR: 1701 { 1702 count_info *a = (count_info *)arg; 1703 if (rdch) { 1704 struct snd_dbuf *bs = rdch->bufsoft; 1705 1706 CHN_LOCK(rdch); 1707 /* XXX abusive DMA update: chn_rdupdate(rdch); */ 1708 a->bytes = sndbuf_gettotal(bs); 1709 a->blocks = sndbuf_getblocks(bs) - rdch->blocks; 1710 a->ptr = sndbuf_getfreeptr(bs); 1711 rdch->blocks = sndbuf_getblocks(bs); 1712 CHN_UNLOCK(rdch); 1713 } else 1714 ret = EINVAL; 1715 } 1716 break; 1717 1718 case SNDCTL_DSP_GETOPTR: 1719 { 1720 count_info *a = (count_info *)arg; 1721 if (wrch) { 1722 struct snd_dbuf *bs = wrch->bufsoft; 1723 1724 CHN_LOCK(wrch); 1725 /* XXX abusive DMA update: chn_wrupdate(wrch); */ 1726 a->bytes = sndbuf_gettotal(bs); 1727 a->blocks = sndbuf_getblocks(bs) - wrch->blocks; 1728 a->ptr = sndbuf_getreadyptr(bs); 1729 wrch->blocks = sndbuf_getblocks(bs); 1730 CHN_UNLOCK(wrch); 1731 } else 1732 ret = EINVAL; 1733 } 1734 break; 1735 1736 case SNDCTL_DSP_GETCAPS: 1737 PCM_LOCK(d); 1738 *arg_i = PCM_CAP_REALTIME | PCM_CAP_MMAP | PCM_CAP_TRIGGER; 1739 if (rdch && wrch && !(dsp_get_flags(i_dev) & SD_F_SIMPLEX)) 1740 *arg_i |= PCM_CAP_DUPLEX; 1741 if (rdch && (rdch->flags & CHN_F_VIRTUAL) != 0) 1742 *arg_i |= PCM_CAP_VIRTUAL; 1743 if (wrch && (wrch->flags & CHN_F_VIRTUAL) != 0) 1744 *arg_i |= PCM_CAP_VIRTUAL; 1745 PCM_UNLOCK(d); 1746 break; 1747 1748 case SOUND_PCM_READ_BITS: 1749 chn = wrch ? wrch : rdch; 1750 if (chn) { 1751 CHN_LOCK(chn); 1752 if (chn->format & AFMT_8BIT) 1753 *arg_i = 8; 1754 else if (chn->format & AFMT_16BIT) 1755 *arg_i = 16; 1756 else if (chn->format & AFMT_24BIT) 1757 *arg_i = 24; 1758 else if (chn->format & AFMT_32BIT) 1759 *arg_i = 32; 1760 else 1761 ret = EINVAL; 1762 CHN_UNLOCK(chn); 1763 } else { 1764 *arg_i = 0; 1765 ret = EINVAL; 1766 } 1767 break; 1768 1769 case SNDCTL_DSP_SETTRIGGER: 1770 if (rdch) { 1771 CHN_LOCK(rdch); 1772 rdch->flags &= ~CHN_F_NOTRIGGER; 1773 if (*arg_i & PCM_ENABLE_INPUT) 1774 chn_start(rdch, 1); 1775 else { 1776 chn_abort(rdch); 1777 chn_resetbuf(rdch); 1778 rdch->flags |= CHN_F_NOTRIGGER; 1779 } 1780 CHN_UNLOCK(rdch); 1781 } 1782 if (wrch) { 1783 CHN_LOCK(wrch); 1784 wrch->flags &= ~CHN_F_NOTRIGGER; 1785 if (*arg_i & PCM_ENABLE_OUTPUT) 1786 chn_start(wrch, 1); 1787 else { 1788 chn_abort(wrch); 1789 chn_resetbuf(wrch); 1790 wrch->flags |= CHN_F_NOTRIGGER; 1791 } 1792 CHN_UNLOCK(wrch); 1793 } 1794 break; 1795 1796 case SNDCTL_DSP_GETTRIGGER: 1797 *arg_i = 0; 1798 if (wrch) { 1799 CHN_LOCK(wrch); 1800 if (wrch->flags & CHN_F_TRIGGERED) 1801 *arg_i |= PCM_ENABLE_OUTPUT; 1802 CHN_UNLOCK(wrch); 1803 } 1804 if (rdch) { 1805 CHN_LOCK(rdch); 1806 if (rdch->flags & CHN_F_TRIGGERED) 1807 *arg_i |= PCM_ENABLE_INPUT; 1808 CHN_UNLOCK(rdch); 1809 } 1810 break; 1811 1812 case SNDCTL_DSP_GETODELAY: 1813 if (wrch) { 1814 struct snd_dbuf *bs = wrch->bufsoft; 1815 1816 CHN_LOCK(wrch); 1817 /* XXX abusive DMA update: chn_wrupdate(wrch); */ 1818 *arg_i = sndbuf_getready(bs); 1819 CHN_UNLOCK(wrch); 1820 } else 1821 ret = EINVAL; 1822 break; 1823 1824 case SNDCTL_DSP_POST: 1825 if (wrch) { 1826 CHN_LOCK(wrch); 1827 wrch->flags &= ~CHN_F_NOTRIGGER; 1828 chn_start(wrch, 1); 1829 CHN_UNLOCK(wrch); 1830 } 1831 break; 1832 1833 case SNDCTL_DSP_SETDUPLEX: 1834 /* 1835 * switch to full-duplex mode if card is in half-duplex 1836 * mode and is able to work in full-duplex mode 1837 */ 1838 PCM_LOCK(d); 1839 if (rdch && wrch && (dsp_get_flags(i_dev) & SD_F_SIMPLEX)) 1840 dsp_set_flags(i_dev, dsp_get_flags(i_dev)^SD_F_SIMPLEX); 1841 PCM_UNLOCK(d); 1842 break; 1843 1844 /* 1845 * The following four ioctls are simple wrappers around mixer_ioctl 1846 * with no further processing. xcmd is short for "translated 1847 * command". 1848 */ 1849 case SNDCTL_DSP_GETRECVOL: 1850 if (xcmd == 0) { 1851 xcmd = SOUND_MIXER_READ_RECLEV; 1852 chn = rdch; 1853 } 1854 /* FALLTHROUGH */ 1855 case SNDCTL_DSP_SETRECVOL: 1856 if (xcmd == 0) { 1857 xcmd = SOUND_MIXER_WRITE_RECLEV; 1858 chn = rdch; 1859 } 1860 /* FALLTHROUGH */ 1861 case SNDCTL_DSP_GETPLAYVOL: 1862 if (xcmd == 0) { 1863 xcmd = SOUND_MIXER_READ_PCM; 1864 chn = wrch; 1865 } 1866 /* FALLTHROUGH */ 1867 case SNDCTL_DSP_SETPLAYVOL: 1868 if (xcmd == 0) { 1869 xcmd = SOUND_MIXER_WRITE_PCM; 1870 chn = wrch; 1871 } 1872 1873 ret = dsp_ioctl_channel(i_dev, chn, xcmd, arg); 1874 if (ret != -1) { 1875 PCM_GIANT_EXIT(d); 1876 return (ret); 1877 } 1878 1879 if (d->mixer_dev != NULL) { 1880 PCM_ACQUIRE_QUICK(d); 1881 ret = mixer_ioctl_cmd(d->mixer_dev, xcmd, arg, -1, td, 1882 MIXER_CMD_DIRECT); 1883 PCM_RELEASE_QUICK(d); 1884 } else 1885 ret = ENOTSUP; 1886 1887 break; 1888 1889 case SNDCTL_DSP_GET_RECSRC_NAMES: 1890 case SNDCTL_DSP_GET_RECSRC: 1891 case SNDCTL_DSP_SET_RECSRC: 1892 if (d->mixer_dev != NULL) { 1893 PCM_ACQUIRE_QUICK(d); 1894 ret = mixer_ioctl_cmd(d->mixer_dev, cmd, arg, -1, td, 1895 MIXER_CMD_DIRECT); 1896 PCM_RELEASE_QUICK(d); 1897 } else 1898 ret = ENOTSUP; 1899 break; 1900 1901 /* 1902 * The following 3 ioctls aren't very useful at the moment. For 1903 * now, only a single channel is associated with a cdev (/dev/dspN 1904 * instance), so there's only a single output routing to use (i.e., 1905 * the wrch bound to this cdev). 1906 */ 1907 case SNDCTL_DSP_GET_PLAYTGT_NAMES: 1908 { 1909 oss_mixer_enuminfo *ei; 1910 ei = (oss_mixer_enuminfo *)arg; 1911 ei->dev = 0; 1912 ei->ctrl = 0; 1913 ei->version = 0; /* static for now */ 1914 ei->strindex[0] = 0; 1915 1916 if (wrch != NULL) { 1917 ei->nvalues = 1; 1918 strlcpy(ei->strings, wrch->name, 1919 sizeof(ei->strings)); 1920 } else { 1921 ei->nvalues = 0; 1922 ei->strings[0] = '\0'; 1923 } 1924 } 1925 break; 1926 case SNDCTL_DSP_GET_PLAYTGT: 1927 case SNDCTL_DSP_SET_PLAYTGT: /* yes, they are the same for now */ 1928 /* 1929 * Re: SET_PLAYTGT 1930 * OSSv4: "The value that was accepted by the device will 1931 * be returned back in the variable pointed by the 1932 * argument." 1933 */ 1934 if (wrch != NULL) 1935 *arg_i = 0; 1936 else 1937 ret = EINVAL; 1938 break; 1939 1940 case SNDCTL_DSP_SILENCE: 1941 /* 1942 * Flush the software (pre-feed) buffer, but try to minimize playback 1943 * interruption. (I.e., record unplayed samples with intent to 1944 * restore by SNDCTL_DSP_SKIP.) Intended for application "pause" 1945 * functionality. 1946 */ 1947 if (wrch == NULL) 1948 ret = EINVAL; 1949 else { 1950 struct snd_dbuf *bs; 1951 CHN_LOCK(wrch); 1952 while (wrch->inprog != 0) 1953 cv_wait(&wrch->cv, wrch->lock); 1954 bs = wrch->bufsoft; 1955 if ((bs->shadbuf != NULL) && (sndbuf_getready(bs) > 0)) { 1956 bs->sl = sndbuf_getready(bs); 1957 sndbuf_dispose(bs, bs->shadbuf, sndbuf_getready(bs)); 1958 sndbuf_fillsilence(bs); 1959 chn_start(wrch, 0); 1960 } 1961 CHN_UNLOCK(wrch); 1962 } 1963 break; 1964 1965 case SNDCTL_DSP_SKIP: 1966 /* 1967 * OSSv4 docs: "This ioctl call discards all unplayed samples in the 1968 * playback buffer by moving the current write position immediately 1969 * before the point where the device is currently reading the samples." 1970 */ 1971 if (wrch == NULL) 1972 ret = EINVAL; 1973 else { 1974 struct snd_dbuf *bs; 1975 CHN_LOCK(wrch); 1976 while (wrch->inprog != 0) 1977 cv_wait(&wrch->cv, wrch->lock); 1978 bs = wrch->bufsoft; 1979 if ((bs->shadbuf != NULL) && (bs->sl > 0)) { 1980 sndbuf_softreset(bs); 1981 sndbuf_acquire(bs, bs->shadbuf, bs->sl); 1982 bs->sl = 0; 1983 chn_start(wrch, 0); 1984 } 1985 CHN_UNLOCK(wrch); 1986 } 1987 break; 1988 1989 case SNDCTL_DSP_CURRENT_OPTR: 1990 case SNDCTL_DSP_CURRENT_IPTR: 1991 /** 1992 * @note Changing formats resets the buffer counters, which differs 1993 * from the 4Front drivers. However, I don't expect this to be 1994 * much of a problem. 1995 * 1996 * @note In a test where @c CURRENT_OPTR is called immediately after write 1997 * returns, this driver is about 32K samples behind whereas 1998 * 4Front's is about 8K samples behind. Should determine source 1999 * of discrepancy, even if only out of curiosity. 2000 * 2001 * @todo Actually test SNDCTL_DSP_CURRENT_IPTR. 2002 */ 2003 chn = (cmd == SNDCTL_DSP_CURRENT_OPTR) ? wrch : rdch; 2004 if (chn == NULL) 2005 ret = EINVAL; 2006 else { 2007 struct snd_dbuf *bs; 2008 /* int tmp; */ 2009 2010 oss_count_t *oc = (oss_count_t *)arg; 2011 2012 CHN_LOCK(chn); 2013 bs = chn->bufsoft; 2014 #if 0 2015 tmp = (sndbuf_getsize(b) + chn_getptr(chn) - sndbuf_gethwptr(b)) % sndbuf_getsize(b); 2016 oc->samples = (sndbuf_gettotal(b) + tmp) / sndbuf_getalign(b); 2017 oc->fifo_samples = (sndbuf_getready(b) - tmp) / sndbuf_getalign(b); 2018 #else 2019 oc->samples = sndbuf_gettotal(bs) / sndbuf_getalign(bs); 2020 oc->fifo_samples = sndbuf_getready(bs) / sndbuf_getalign(bs); 2021 #endif 2022 CHN_UNLOCK(chn); 2023 } 2024 break; 2025 2026 case SNDCTL_DSP_HALT_OUTPUT: 2027 case SNDCTL_DSP_HALT_INPUT: 2028 chn = (cmd == SNDCTL_DSP_HALT_OUTPUT) ? wrch : rdch; 2029 if (chn == NULL) 2030 ret = EINVAL; 2031 else { 2032 CHN_LOCK(chn); 2033 chn_abort(chn); 2034 CHN_UNLOCK(chn); 2035 } 2036 break; 2037 2038 case SNDCTL_DSP_LOW_WATER: 2039 /* 2040 * Set the number of bytes required to attract attention by 2041 * select/poll. 2042 */ 2043 if (wrch != NULL) { 2044 CHN_LOCK(wrch); 2045 wrch->lw = (*arg_i > 1) ? *arg_i : 1; 2046 CHN_UNLOCK(wrch); 2047 } 2048 if (rdch != NULL) { 2049 CHN_LOCK(rdch); 2050 rdch->lw = (*arg_i > 1) ? *arg_i : 1; 2051 CHN_UNLOCK(rdch); 2052 } 2053 break; 2054 2055 case SNDCTL_DSP_GETERROR: 2056 /* 2057 * OSSv4 docs: "All errors and counters will automatically be 2058 * cleared to zeroes after the call so each call will return only 2059 * the errors that occurred after the previous invocation. ... The 2060 * play_underruns and rec_overrun fields are the only useful fields 2061 * returned by OSS 4.0." 2062 */ 2063 { 2064 audio_errinfo *ei = (audio_errinfo *)arg; 2065 2066 bzero((void *)ei, sizeof(*ei)); 2067 2068 if (wrch != NULL) { 2069 CHN_LOCK(wrch); 2070 ei->play_underruns = wrch->xruns; 2071 wrch->xruns = 0; 2072 CHN_UNLOCK(wrch); 2073 } 2074 if (rdch != NULL) { 2075 CHN_LOCK(rdch); 2076 ei->rec_overruns = rdch->xruns; 2077 rdch->xruns = 0; 2078 CHN_UNLOCK(rdch); 2079 } 2080 } 2081 break; 2082 2083 case SNDCTL_DSP_SYNCGROUP: 2084 PCM_ACQUIRE_QUICK(d); 2085 ret = dsp_oss_syncgroup(wrch, rdch, (oss_syncgroup *)arg); 2086 PCM_RELEASE_QUICK(d); 2087 break; 2088 2089 case SNDCTL_DSP_SYNCSTART: 2090 PCM_ACQUIRE_QUICK(d); 2091 ret = dsp_oss_syncstart(*arg_i); 2092 PCM_RELEASE_QUICK(d); 2093 break; 2094 2095 case SNDCTL_DSP_POLICY: 2096 PCM_ACQUIRE_QUICK(d); 2097 ret = dsp_oss_policy(wrch, rdch, *arg_i); 2098 PCM_RELEASE_QUICK(d); 2099 break; 2100 2101 case SNDCTL_DSP_COOKEDMODE: 2102 PCM_ACQUIRE_QUICK(d); 2103 if (!(dsp_get_flags(i_dev) & SD_F_BITPERFECT)) 2104 ret = dsp_oss_cookedmode(wrch, rdch, *arg_i); 2105 PCM_RELEASE_QUICK(d); 2106 break; 2107 case SNDCTL_DSP_GET_CHNORDER: 2108 PCM_ACQUIRE_QUICK(d); 2109 ret = dsp_oss_getchnorder(wrch, rdch, (unsigned long long *)arg); 2110 PCM_RELEASE_QUICK(d); 2111 break; 2112 case SNDCTL_DSP_SET_CHNORDER: 2113 PCM_ACQUIRE_QUICK(d); 2114 ret = dsp_oss_setchnorder(wrch, rdch, (unsigned long long *)arg); 2115 PCM_RELEASE_QUICK(d); 2116 break; 2117 case SNDCTL_DSP_GETCHANNELMASK: /* XXX vlc */ 2118 PCM_ACQUIRE_QUICK(d); 2119 ret = dsp_oss_getchannelmask(wrch, rdch, (int *)arg); 2120 PCM_RELEASE_QUICK(d); 2121 break; 2122 case SNDCTL_DSP_BIND_CHANNEL: /* XXX what?!? */ 2123 ret = EINVAL; 2124 break; 2125 #ifdef OSSV4_EXPERIMENT 2126 /* 2127 * XXX The following ioctls are not yet supported and just return 2128 * EINVAL. 2129 */ 2130 case SNDCTL_DSP_GETOPEAKS: 2131 case SNDCTL_DSP_GETIPEAKS: 2132 chn = (cmd == SNDCTL_DSP_GETOPEAKS) ? wrch : rdch; 2133 if (chn == NULL) 2134 ret = EINVAL; 2135 else { 2136 oss_peaks_t *op = (oss_peaks_t *)arg; 2137 int lpeak, rpeak; 2138 2139 CHN_LOCK(chn); 2140 ret = chn_getpeaks(chn, &lpeak, &rpeak); 2141 if (ret == -1) 2142 ret = EINVAL; 2143 else { 2144 (*op)[0] = lpeak; 2145 (*op)[1] = rpeak; 2146 } 2147 CHN_UNLOCK(chn); 2148 } 2149 break; 2150 2151 /* 2152 * XXX Once implemented, revisit this for proper cv protection 2153 * (if necessary). 2154 */ 2155 case SNDCTL_GETLABEL: 2156 ret = dsp_oss_getlabel(wrch, rdch, (oss_label_t *)arg); 2157 break; 2158 case SNDCTL_SETLABEL: 2159 ret = dsp_oss_setlabel(wrch, rdch, (oss_label_t *)arg); 2160 break; 2161 case SNDCTL_GETSONG: 2162 ret = dsp_oss_getsong(wrch, rdch, (oss_longname_t *)arg); 2163 break; 2164 case SNDCTL_SETSONG: 2165 ret = dsp_oss_setsong(wrch, rdch, (oss_longname_t *)arg); 2166 break; 2167 case SNDCTL_SETNAME: 2168 ret = dsp_oss_setname(wrch, rdch, (oss_longname_t *)arg); 2169 break; 2170 #if 0 2171 /** 2172 * @note The S/PDIF interface ioctls, @c SNDCTL_DSP_READCTL and 2173 * @c SNDCTL_DSP_WRITECTL have been omitted at the suggestion of 2174 * 4Front Technologies. 2175 */ 2176 case SNDCTL_DSP_READCTL: 2177 case SNDCTL_DSP_WRITECTL: 2178 ret = EINVAL; 2179 break; 2180 #endif /* !0 (explicitly omitted ioctls) */ 2181 2182 #endif /* !OSSV4_EXPERIMENT */ 2183 case SNDCTL_DSP_MAPINBUF: 2184 case SNDCTL_DSP_MAPOUTBUF: 2185 case SNDCTL_DSP_SETSYNCRO: 2186 /* undocumented */ 2187 2188 case SNDCTL_DSP_SUBDIVIDE: 2189 case SOUND_PCM_WRITE_FILTER: 2190 case SOUND_PCM_READ_FILTER: 2191 /* dunno what these do, don't sound important */ 2192 2193 default: 2194 DEB(printf("default ioctl fn 0x%08lx fail\n", cmd)); 2195 ret = EINVAL; 2196 break; 2197 } 2198 2199 PCM_GIANT_LEAVE(d); 2200 2201 return (ret); 2202 } 2203 2204 static int 2205 dsp_poll(struct cdev *i_dev, int events, struct thread *td) 2206 { 2207 struct snddev_info *d; 2208 struct pcm_channel *wrch, *rdch; 2209 int ret, e; 2210 2211 d = dsp_get_info(i_dev); 2212 if (PCM_DETACHING(d) || !DSP_REGISTERED(d, i_dev)) { 2213 /* XXX many clients don't understand POLLNVAL */ 2214 return (events & (POLLHUP | POLLPRI | POLLIN | 2215 POLLRDNORM | POLLOUT | POLLWRNORM)); 2216 } 2217 PCM_GIANT_ENTER(d); 2218 2219 wrch = NULL; 2220 rdch = NULL; 2221 ret = 0; 2222 2223 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 2224 2225 if (wrch != NULL && !(wrch->flags & CHN_F_DEAD)) { 2226 e = (events & (POLLOUT | POLLWRNORM)); 2227 if (e) 2228 ret |= chn_poll(wrch, e, td); 2229 } 2230 2231 if (rdch != NULL && !(rdch->flags & CHN_F_DEAD)) { 2232 e = (events & (POLLIN | POLLRDNORM)); 2233 if (e) 2234 ret |= chn_poll(rdch, e, td); 2235 } 2236 2237 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 2238 2239 PCM_GIANT_LEAVE(d); 2240 2241 return (ret); 2242 } 2243 2244 static int 2245 dsp_mmap(struct cdev *i_dev, vm_ooffset_t offset, vm_paddr_t *paddr, 2246 int nprot, vm_memattr_t *memattr) 2247 { 2248 2249 /* 2250 * offset is in range due to checks in dsp_mmap_single(). 2251 * XXX memattr is not honored. 2252 */ 2253 *paddr = vtophys(offset); 2254 return (0); 2255 } 2256 2257 static int 2258 dsp_mmap_single(struct cdev *i_dev, vm_ooffset_t *offset, 2259 vm_size_t size, struct vm_object **object, int nprot) 2260 { 2261 struct snddev_info *d; 2262 struct pcm_channel *wrch, *rdch, *c; 2263 2264 /* 2265 * Reject PROT_EXEC by default. It just doesn't makes sense. 2266 * Unfortunately, we have to give up this one due to linux_mmap 2267 * changes. 2268 * 2269 * https://lists.freebsd.org/pipermail/freebsd-emulation/2007-June/003698.html 2270 * 2271 */ 2272 #ifdef SV_ABI_LINUX 2273 if ((nprot & PROT_EXEC) && (dsp_mmap_allow_prot_exec < 0 || 2274 (dsp_mmap_allow_prot_exec == 0 && 2275 SV_CURPROC_ABI() != SV_ABI_LINUX))) 2276 #else 2277 if ((nprot & PROT_EXEC) && dsp_mmap_allow_prot_exec < 1) 2278 #endif 2279 return (EINVAL); 2280 2281 /* 2282 * PROT_READ (alone) selects the input buffer. 2283 * PROT_WRITE (alone) selects the output buffer. 2284 * PROT_WRITE|PROT_READ together select the output buffer. 2285 */ 2286 if ((nprot & (PROT_READ | PROT_WRITE)) == 0) 2287 return (EINVAL); 2288 2289 d = dsp_get_info(i_dev); 2290 if (PCM_DETACHING(d) || !DSP_REGISTERED(d, i_dev)) 2291 return (EINVAL); 2292 2293 PCM_GIANT_ENTER(d); 2294 2295 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 2296 2297 c = ((nprot & PROT_WRITE) != 0) ? wrch : rdch; 2298 if (c == NULL || (c->flags & CHN_F_MMAP_INVALID) || 2299 (*offset + size) > sndbuf_getallocsize(c->bufsoft) || 2300 (wrch != NULL && (wrch->flags & CHN_F_MMAP_INVALID)) || 2301 (rdch != NULL && (rdch->flags & CHN_F_MMAP_INVALID))) { 2302 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 2303 PCM_GIANT_EXIT(d); 2304 return (EINVAL); 2305 } 2306 2307 if (wrch != NULL) 2308 wrch->flags |= CHN_F_MMAP; 2309 if (rdch != NULL) 2310 rdch->flags |= CHN_F_MMAP; 2311 2312 *offset = (uintptr_t)sndbuf_getbufofs(c->bufsoft, *offset); 2313 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 2314 *object = vm_pager_allocate(OBJT_DEVICE, i_dev, 2315 size, nprot, *offset, curthread->td_ucred); 2316 2317 PCM_GIANT_LEAVE(d); 2318 2319 if (*object == NULL) 2320 return (EINVAL); 2321 return (0); 2322 } 2323 2324 /* So much for dev_stdclone() */ 2325 static int 2326 dsp_stdclone(char *name, char *namep, char *sep, int use_sep, int *u, int *c) 2327 { 2328 size_t len; 2329 2330 len = strlen(namep); 2331 if (strncmp(name, namep, len) != 0) 2332 return (ENODEV); 2333 2334 name += len; 2335 2336 if (isdigit(*name) == 0) 2337 return (ENODEV); 2338 2339 len = strlen(sep); 2340 2341 if (*name == '0' && !(name[1] == '\0' || bcmp(name + 1, sep, len) == 0)) 2342 return (ENODEV); 2343 2344 for (*u = 0; isdigit(*name) != 0; name++) { 2345 *u *= 10; 2346 *u += *name - '0'; 2347 if (*u > dsp_umax) 2348 return (ENODEV); 2349 } 2350 2351 if (*name == '\0') 2352 return ((use_sep == 0) ? 0 : ENODEV); 2353 2354 if (bcmp(name, sep, len) != 0 || isdigit(name[len]) == 0) 2355 return (ENODEV); 2356 2357 name += len; 2358 2359 if (*name == '0' && name[1] != '\0') 2360 return (ENODEV); 2361 2362 for (*c = 0; isdigit(*name) != 0; name++) { 2363 *c *= 10; 2364 *c += *name - '0'; 2365 if (*c > dsp_cmax) 2366 return (ENODEV); 2367 } 2368 2369 if (*name != '\0') 2370 return (ENODEV); 2371 2372 return (0); 2373 } 2374 2375 static void 2376 dsp_clone(void *arg, 2377 struct ucred *cred, 2378 char *name, int namelen, struct cdev **dev) 2379 { 2380 struct snddev_info *d; 2381 struct snd_clone_entry *ce; 2382 struct pcm_channel *c; 2383 int i, unit, udcmask, cunit, devtype, devhw, devcmax, tumax; 2384 char *devname, *devcmp, *devsep; 2385 2386 KASSERT(dsp_umax >= 0 && dsp_cmax >= 0, ("Uninitialized unit!")); 2387 2388 if (*dev != NULL) 2389 return; 2390 2391 unit = -1; 2392 cunit = -1; 2393 devtype = -1; 2394 devhw = 0; 2395 devcmax = -1; 2396 tumax = -1; 2397 devname = NULL; 2398 devsep = NULL; 2399 2400 for (i = 0; unit == -1 && 2401 i < (sizeof(dsp_cdevs) / sizeof(dsp_cdevs[0])); i++) { 2402 devtype = dsp_cdevs[i].type; 2403 devcmp = dsp_cdevs[i].name; 2404 devsep = dsp_cdevs[i].sep; 2405 devname = dsp_cdevs[i].alias; 2406 if (devname == NULL) 2407 devname = devcmp; 2408 devhw = dsp_cdevs[i].hw; 2409 devcmax = dsp_cdevs[i].max - 1; 2410 if (strcmp(name, devcmp) == 0) { 2411 if (dsp_basename_clone != 0) 2412 unit = snd_unit; 2413 } else if (dsp_stdclone(name, devcmp, devsep, 2414 dsp_cdevs[i].use_sep, &unit, &cunit) != 0) { 2415 unit = -1; 2416 cunit = -1; 2417 } 2418 } 2419 2420 d = devclass_get_softc(pcm_devclass, unit); 2421 if (!PCM_REGISTERED(d) || d->clones == NULL) 2422 return; 2423 2424 /* XXX Need Giant magic entry ??? */ 2425 2426 PCM_LOCK(d); 2427 if (snd_clone_disabled(d->clones)) { 2428 PCM_UNLOCK(d); 2429 return; 2430 } 2431 2432 PCM_WAIT(d); 2433 PCM_ACQUIRE(d); 2434 PCM_UNLOCK(d); 2435 2436 udcmask = snd_u2unit(unit) | snd_d2unit(devtype); 2437 2438 if (devhw != 0) { 2439 KASSERT(devcmax <= dsp_cmax, 2440 ("overflow: devcmax=%d, dsp_cmax=%d", devcmax, dsp_cmax)); 2441 if (cunit > devcmax) { 2442 PCM_RELEASE_QUICK(d); 2443 return; 2444 } 2445 udcmask |= snd_c2unit(cunit); 2446 CHN_FOREACH(c, d, channels.pcm) { 2447 CHN_LOCK(c); 2448 if (c->unit != udcmask) { 2449 CHN_UNLOCK(c); 2450 continue; 2451 } 2452 CHN_UNLOCK(c); 2453 udcmask &= ~snd_c2unit(cunit); 2454 /* 2455 * Temporarily increase clone maxunit to overcome 2456 * vchan flexibility. 2457 * 2458 * # sysctl dev.pcm.0.play.vchans=256 2459 * dev.pcm.0.play.vchans: 1 -> 256 2460 * # cat /dev/zero > /dev/dsp0.vp255 & 2461 * [1] 17296 2462 * # sysctl dev.pcm.0.play.vchans=0 2463 * dev.pcm.0.play.vchans: 256 -> 1 2464 * # fg 2465 * [1] + running cat /dev/zero > /dev/dsp0.vp255 2466 * ^C 2467 * # cat /dev/zero > /dev/dsp0.vp255 2468 * zsh: operation not supported: /dev/dsp0.vp255 2469 */ 2470 tumax = snd_clone_getmaxunit(d->clones); 2471 if (cunit > tumax) 2472 snd_clone_setmaxunit(d->clones, cunit); 2473 else 2474 tumax = -1; 2475 goto dsp_clone_alloc; 2476 } 2477 /* 2478 * Ok, so we're requesting unallocated vchan, but still 2479 * within maximum vchan limit. 2480 */ 2481 if (((devtype == SND_DEV_DSPHW_VPLAY && d->pvchancount > 0) || 2482 (devtype == SND_DEV_DSPHW_VREC && d->rvchancount > 0)) && 2483 cunit < snd_maxautovchans) { 2484 udcmask &= ~snd_c2unit(cunit); 2485 tumax = snd_clone_getmaxunit(d->clones); 2486 if (cunit > tumax) 2487 snd_clone_setmaxunit(d->clones, cunit); 2488 else 2489 tumax = -1; 2490 goto dsp_clone_alloc; 2491 } 2492 PCM_RELEASE_QUICK(d); 2493 return; 2494 } 2495 2496 dsp_clone_alloc: 2497 ce = snd_clone_alloc(d->clones, dev, &cunit, udcmask); 2498 if (tumax != -1) 2499 snd_clone_setmaxunit(d->clones, tumax); 2500 if (ce != NULL) { 2501 udcmask |= snd_c2unit(cunit); 2502 *dev = make_dev(&dsp_cdevsw, PCMMINOR(udcmask), 2503 UID_ROOT, GID_WHEEL, 0666, "%s%d%s%d", 2504 devname, unit, devsep, cunit); 2505 snd_clone_register(ce, *dev); 2506 } 2507 2508 PCM_RELEASE_QUICK(d); 2509 2510 if (*dev != NULL) 2511 dev_ref(*dev); 2512 } 2513 2514 static void 2515 dsp_sysinit(void *p) 2516 { 2517 if (dsp_ehtag != NULL) 2518 return; 2519 /* initialize unit numbering */ 2520 snd_unit_init(); 2521 dsp_umax = PCMMAXUNIT; 2522 dsp_cmax = PCMMAXCHAN; 2523 dsp_ehtag = EVENTHANDLER_REGISTER(dev_clone, dsp_clone, 0, 1000); 2524 } 2525 2526 static void 2527 dsp_sysuninit(void *p) 2528 { 2529 if (dsp_ehtag == NULL) 2530 return; 2531 EVENTHANDLER_DEREGISTER(dev_clone, dsp_ehtag); 2532 dsp_ehtag = NULL; 2533 } 2534 2535 SYSINIT(dsp_sysinit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysinit, NULL); 2536 SYSUNINIT(dsp_sysuninit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysuninit, NULL); 2537 2538 char * 2539 dsp_unit2name(char *buf, size_t len, int unit) 2540 { 2541 int i, dtype; 2542 2543 KASSERT(buf != NULL && len != 0, 2544 ("bogus buf=%p len=%ju", buf, (uintmax_t)len)); 2545 2546 dtype = snd_unit2d(unit); 2547 2548 for (i = 0; i < (sizeof(dsp_cdevs) / sizeof(dsp_cdevs[0])); i++) { 2549 if (dtype != dsp_cdevs[i].type || dsp_cdevs[i].alias != NULL) 2550 continue; 2551 snprintf(buf, len, "%s%d%s%d", dsp_cdevs[i].name, 2552 snd_unit2u(unit), dsp_cdevs[i].sep, snd_unit2c(unit)); 2553 return (buf); 2554 } 2555 2556 return (NULL); 2557 } 2558 2559 /** 2560 * @brief Handler for SNDCTL_AUDIOINFO. 2561 * 2562 * Gathers information about the audio device specified in ai->dev. If 2563 * ai->dev == -1, then this function gathers information about the current 2564 * device. If the call comes in on a non-audio device and ai->dev == -1, 2565 * return EINVAL. 2566 * 2567 * This routine is supposed to go practically straight to the hardware, 2568 * getting capabilities directly from the sound card driver, side-stepping 2569 * the intermediate channel interface. 2570 * 2571 * Note, however, that the usefulness of this command is significantly 2572 * decreased when requesting info about any device other than the one serving 2573 * the request. While each snddev_channel refers to a specific device node, 2574 * the converse is *not* true. Currently, when a sound device node is opened, 2575 * the sound subsystem scans for an available audio channel (or channels, if 2576 * opened in read+write) and then assigns them to the si_drv[12] private 2577 * data fields. As a result, any information returned linking a channel to 2578 * a specific character device isn't necessarily accurate. 2579 * 2580 * @note 2581 * Calling threads must not hold any snddev_info or pcm_channel locks. 2582 * 2583 * @param dev device on which the ioctl was issued 2584 * @param ai ioctl request data container 2585 * 2586 * @retval 0 success 2587 * @retval EINVAL ai->dev specifies an invalid device 2588 * 2589 * @todo Verify correctness of Doxygen tags. ;) 2590 */ 2591 int 2592 dsp_oss_audioinfo(struct cdev *i_dev, oss_audioinfo *ai) 2593 { 2594 struct pcmchan_caps *caps; 2595 struct pcm_channel *ch; 2596 struct snddev_info *d; 2597 uint32_t fmts; 2598 int i, nchan, *rates, minch, maxch; 2599 char *devname, buf[CHN_NAMELEN]; 2600 2601 /* 2602 * If probing the device that received the ioctl, make sure it's a 2603 * DSP device. (Users may use this ioctl with /dev/mixer and 2604 * /dev/midi.) 2605 */ 2606 if (ai->dev == -1 && i_dev->si_devsw != &dsp_cdevsw) 2607 return (EINVAL); 2608 2609 ch = NULL; 2610 devname = NULL; 2611 nchan = 0; 2612 bzero(buf, sizeof(buf)); 2613 2614 /* 2615 * Search for the requested audio device (channel). Start by 2616 * iterating over pcm devices. 2617 */ 2618 for (i = 0; pcm_devclass != NULL && 2619 i < devclass_get_maxunit(pcm_devclass); i++) { 2620 d = devclass_get_softc(pcm_devclass, i); 2621 if (!PCM_REGISTERED(d)) 2622 continue; 2623 2624 /* XXX Need Giant magic entry ??? */ 2625 2626 /* See the note in function docblock */ 2627 PCM_UNLOCKASSERT(d); 2628 PCM_LOCK(d); 2629 2630 CHN_FOREACH(ch, d, channels.pcm) { 2631 CHN_UNLOCKASSERT(ch); 2632 CHN_LOCK(ch); 2633 if (ai->dev == -1) { 2634 if (DSP_REGISTERED(d, i_dev) && 2635 (ch == PCM_RDCH(i_dev) || /* record ch */ 2636 ch == PCM_WRCH(i_dev))) { /* playback ch */ 2637 devname = dsp_unit2name(buf, 2638 sizeof(buf), ch->unit); 2639 } 2640 } else if (ai->dev == nchan) { 2641 devname = dsp_unit2name(buf, sizeof(buf), 2642 ch->unit); 2643 } 2644 if (devname != NULL) 2645 break; 2646 CHN_UNLOCK(ch); 2647 ++nchan; 2648 } 2649 2650 if (devname != NULL) { 2651 /* 2652 * At this point, the following synchronization stuff 2653 * has happened: 2654 * - a specific PCM device is locked. 2655 * - a specific audio channel has been locked, so be 2656 * sure to unlock when exiting; 2657 */ 2658 2659 caps = chn_getcaps(ch); 2660 2661 /* 2662 * With all handles collected, zero out the user's 2663 * container and begin filling in its fields. 2664 */ 2665 bzero((void *)ai, sizeof(oss_audioinfo)); 2666 2667 ai->dev = nchan; 2668 strlcpy(ai->name, ch->name, sizeof(ai->name)); 2669 2670 if ((ch->flags & CHN_F_BUSY) == 0) 2671 ai->busy = 0; 2672 else 2673 ai->busy = (ch->direction == PCMDIR_PLAY) ? OPEN_WRITE : OPEN_READ; 2674 2675 /** 2676 * @note 2677 * @c cmd - OSSv4 docs: "Only supported under Linux at 2678 * this moment." Cop-out, I know, but I'll save 2679 * running around in the process table for later. 2680 * Is there a risk of leaking information? 2681 */ 2682 ai->pid = ch->pid; 2683 2684 /* 2685 * These flags stolen from SNDCTL_DSP_GETCAPS handler. 2686 * Note, however, that a single channel operates in 2687 * only one direction, so PCM_CAP_DUPLEX is out. 2688 */ 2689 /** 2690 * @todo @c SNDCTL_AUDIOINFO::caps - Make drivers keep 2691 * these in pcmchan::caps? 2692 */ 2693 ai->caps = PCM_CAP_REALTIME | PCM_CAP_MMAP | PCM_CAP_TRIGGER | 2694 ((ch->flags & CHN_F_VIRTUAL) ? PCM_CAP_VIRTUAL : 0) | 2695 ((ch->direction == PCMDIR_PLAY) ? PCM_CAP_OUTPUT : PCM_CAP_INPUT); 2696 2697 /* 2698 * Collect formats supported @b natively by the 2699 * device. Also determine min/max channels. (I.e., 2700 * mono, stereo, or both?) 2701 * 2702 * If any channel is stereo, maxch = 2; 2703 * if all channels are stereo, minch = 2, too; 2704 * if any channel is mono, minch = 1; 2705 * and if all channels are mono, maxch = 1. 2706 */ 2707 minch = 0; 2708 maxch = 0; 2709 fmts = 0; 2710 for (i = 0; caps->fmtlist[i]; i++) { 2711 fmts |= caps->fmtlist[i]; 2712 if (AFMT_CHANNEL(caps->fmtlist[i]) > 1) { 2713 minch = (minch == 0) ? 2 : minch; 2714 maxch = 2; 2715 } else { 2716 minch = 1; 2717 maxch = (maxch == 0) ? 1 : maxch; 2718 } 2719 } 2720 2721 if (ch->direction == PCMDIR_PLAY) 2722 ai->oformats = fmts; 2723 else 2724 ai->iformats = fmts; 2725 2726 /** 2727 * @note 2728 * @c magic - OSSv4 docs: "Reserved for internal use 2729 * by OSS." 2730 * 2731 * @par 2732 * @c card_number - OSSv4 docs: "Number of the sound 2733 * card where this device belongs or -1 if this 2734 * information is not available. Applications 2735 * should normally not use this field for any 2736 * purpose." 2737 */ 2738 ai->card_number = -1; 2739 /** 2740 * @todo @c song_name - depends first on 2741 * SNDCTL_[GS]ETSONG @todo @c label - depends 2742 * on SNDCTL_[GS]ETLABEL 2743 * @todo @c port_number - routing information? 2744 */ 2745 ai->port_number = -1; 2746 ai->mixer_dev = (d->mixer_dev != NULL) ? PCMUNIT(d->mixer_dev) : -1; 2747 /** 2748 * @note 2749 * @c real_device - OSSv4 docs: "Obsolete." 2750 */ 2751 ai->real_device = -1; 2752 strlcpy(ai->devnode, "/dev/", sizeof(ai->devnode)); 2753 strlcat(ai->devnode, devname, sizeof(ai->devnode)); 2754 ai->enabled = device_is_attached(d->dev) ? 1 : 0; 2755 /** 2756 * @note 2757 * @c flags - OSSv4 docs: "Reserved for future use." 2758 * 2759 * @note 2760 * @c binding - OSSv4 docs: "Reserved for future use." 2761 * 2762 * @todo @c handle - haven't decided how to generate 2763 * this yet; bus, vendor, device IDs? 2764 */ 2765 ai->min_rate = caps->minspeed; 2766 ai->max_rate = caps->maxspeed; 2767 2768 ai->min_channels = minch; 2769 ai->max_channels = maxch; 2770 2771 ai->nrates = chn_getrates(ch, &rates); 2772 if (ai->nrates > OSS_MAX_SAMPLE_RATES) 2773 ai->nrates = OSS_MAX_SAMPLE_RATES; 2774 2775 for (i = 0; i < ai->nrates; i++) 2776 ai->rates[i] = rates[i]; 2777 2778 ai->next_play_engine = 0; 2779 ai->next_rec_engine = 0; 2780 2781 CHN_UNLOCK(ch); 2782 } 2783 2784 PCM_UNLOCK(d); 2785 2786 if (devname != NULL) 2787 return (0); 2788 } 2789 2790 /* Exhausted the search -- nothing is locked, so return. */ 2791 return (EINVAL); 2792 } 2793 2794 /** 2795 * @brief Assigns a PCM channel to a sync group. 2796 * 2797 * Sync groups are used to enable audio operations on multiple devices 2798 * simultaneously. They may be used with any number of devices and may 2799 * span across applications. Devices are added to groups with 2800 * the SNDCTL_DSP_SYNCGROUP ioctl, and operations are triggered with the 2801 * SNDCTL_DSP_SYNCSTART ioctl. 2802 * 2803 * If the @c id field of the @c group parameter is set to zero, then a new 2804 * sync group is created. Otherwise, wrch and rdch (if set) are added to 2805 * the group specified. 2806 * 2807 * @todo As far as memory allocation, should we assume that things are 2808 * okay and allocate with M_WAITOK before acquiring channel locks, 2809 * freeing later if not? 2810 * 2811 * @param wrch output channel associated w/ device (if any) 2812 * @param rdch input channel associated w/ device (if any) 2813 * @param group Sync group parameters 2814 * 2815 * @retval 0 success 2816 * @retval non-zero error to be propagated upstream 2817 */ 2818 static int 2819 dsp_oss_syncgroup(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_syncgroup *group) 2820 { 2821 struct pcmchan_syncmember *smrd, *smwr; 2822 struct pcmchan_syncgroup *sg; 2823 int ret, sg_ids[3]; 2824 2825 smrd = NULL; 2826 smwr = NULL; 2827 sg = NULL; 2828 ret = 0; 2829 2830 /* 2831 * Free_unr() may sleep, so store released syncgroup IDs until after 2832 * all locks are released. 2833 */ 2834 sg_ids[0] = sg_ids[1] = sg_ids[2] = 0; 2835 2836 PCM_SG_LOCK(); 2837 2838 /* 2839 * - Insert channel(s) into group's member list. 2840 * - Set CHN_F_NOTRIGGER on channel(s). 2841 * - Stop channel(s). 2842 */ 2843 2844 /* 2845 * If device's channels are already mapped to a group, unmap them. 2846 */ 2847 if (wrch) { 2848 CHN_LOCK(wrch); 2849 sg_ids[0] = chn_syncdestroy(wrch); 2850 } 2851 2852 if (rdch) { 2853 CHN_LOCK(rdch); 2854 sg_ids[1] = chn_syncdestroy(rdch); 2855 } 2856 2857 /* 2858 * Verify that mode matches character device properites. 2859 * - Bail if PCM_ENABLE_OUTPUT && wrch == NULL. 2860 * - Bail if PCM_ENABLE_INPUT && rdch == NULL. 2861 */ 2862 if (((wrch == NULL) && (group->mode & PCM_ENABLE_OUTPUT)) || 2863 ((rdch == NULL) && (group->mode & PCM_ENABLE_INPUT))) { 2864 ret = EINVAL; 2865 goto out; 2866 } 2867 2868 /* 2869 * An id of zero indicates the user wants to create a new 2870 * syncgroup. 2871 */ 2872 if (group->id == 0) { 2873 sg = (struct pcmchan_syncgroup *)malloc(sizeof(*sg), M_DEVBUF, M_NOWAIT); 2874 if (sg != NULL) { 2875 SLIST_INIT(&sg->members); 2876 sg->id = alloc_unr(pcmsg_unrhdr); 2877 2878 group->id = sg->id; 2879 SLIST_INSERT_HEAD(&snd_pcm_syncgroups, sg, link); 2880 } else 2881 ret = ENOMEM; 2882 } else { 2883 SLIST_FOREACH(sg, &snd_pcm_syncgroups, link) { 2884 if (sg->id == group->id) 2885 break; 2886 } 2887 if (sg == NULL) 2888 ret = EINVAL; 2889 } 2890 2891 /* Couldn't create or find a syncgroup. Fail. */ 2892 if (sg == NULL) 2893 goto out; 2894 2895 /* 2896 * Allocate a syncmember, assign it and a channel together, and 2897 * insert into syncgroup. 2898 */ 2899 if (group->mode & PCM_ENABLE_INPUT) { 2900 smrd = (struct pcmchan_syncmember *)malloc(sizeof(*smrd), M_DEVBUF, M_NOWAIT); 2901 if (smrd == NULL) { 2902 ret = ENOMEM; 2903 goto out; 2904 } 2905 2906 SLIST_INSERT_HEAD(&sg->members, smrd, link); 2907 smrd->parent = sg; 2908 smrd->ch = rdch; 2909 2910 chn_abort(rdch); 2911 rdch->flags |= CHN_F_NOTRIGGER; 2912 rdch->sm = smrd; 2913 } 2914 2915 if (group->mode & PCM_ENABLE_OUTPUT) { 2916 smwr = (struct pcmchan_syncmember *)malloc(sizeof(*smwr), M_DEVBUF, M_NOWAIT); 2917 if (smwr == NULL) { 2918 ret = ENOMEM; 2919 goto out; 2920 } 2921 2922 SLIST_INSERT_HEAD(&sg->members, smwr, link); 2923 smwr->parent = sg; 2924 smwr->ch = wrch; 2925 2926 chn_abort(wrch); 2927 wrch->flags |= CHN_F_NOTRIGGER; 2928 wrch->sm = smwr; 2929 } 2930 2931 out: 2932 if (ret != 0) { 2933 if (smrd != NULL) 2934 free(smrd, M_DEVBUF); 2935 if ((sg != NULL) && SLIST_EMPTY(&sg->members)) { 2936 sg_ids[2] = sg->id; 2937 SLIST_REMOVE(&snd_pcm_syncgroups, sg, pcmchan_syncgroup, link); 2938 free(sg, M_DEVBUF); 2939 } 2940 2941 if (wrch) 2942 wrch->sm = NULL; 2943 if (rdch) 2944 rdch->sm = NULL; 2945 } 2946 2947 if (wrch) 2948 CHN_UNLOCK(wrch); 2949 if (rdch) 2950 CHN_UNLOCK(rdch); 2951 2952 PCM_SG_UNLOCK(); 2953 2954 if (sg_ids[0]) 2955 free_unr(pcmsg_unrhdr, sg_ids[0]); 2956 if (sg_ids[1]) 2957 free_unr(pcmsg_unrhdr, sg_ids[1]); 2958 if (sg_ids[2]) 2959 free_unr(pcmsg_unrhdr, sg_ids[2]); 2960 2961 return (ret); 2962 } 2963 2964 /** 2965 * @brief Launch a sync group into action 2966 * 2967 * Sync groups are established via SNDCTL_DSP_SYNCGROUP. This function 2968 * iterates over all members, triggering them along the way. 2969 * 2970 * @note Caller must not hold any channel locks. 2971 * 2972 * @param sg_id sync group identifier 2973 * 2974 * @retval 0 success 2975 * @retval non-zero error worthy of propagating upstream to user 2976 */ 2977 static int 2978 dsp_oss_syncstart(int sg_id) 2979 { 2980 struct pcmchan_syncmember *sm, *sm_tmp; 2981 struct pcmchan_syncgroup *sg; 2982 struct pcm_channel *c; 2983 int ret, needlocks; 2984 2985 /* Get the synclists lock */ 2986 PCM_SG_LOCK(); 2987 2988 do { 2989 ret = 0; 2990 needlocks = 0; 2991 2992 /* Search for syncgroup by ID */ 2993 SLIST_FOREACH(sg, &snd_pcm_syncgroups, link) { 2994 if (sg->id == sg_id) 2995 break; 2996 } 2997 2998 /* Return EINVAL if not found */ 2999 if (sg == NULL) { 3000 ret = EINVAL; 3001 break; 3002 } 3003 3004 /* Any removals resulting in an empty group should've handled this */ 3005 KASSERT(!SLIST_EMPTY(&sg->members), ("found empty syncgroup")); 3006 3007 /* 3008 * Attempt to lock all member channels - if any are already 3009 * locked, unlock those acquired, sleep for a bit, and try 3010 * again. 3011 */ 3012 SLIST_FOREACH(sm, &sg->members, link) { 3013 if (CHN_TRYLOCK(sm->ch) == 0) { 3014 int timo = hz * 5/1000; 3015 if (timo < 1) 3016 timo = 1; 3017 3018 /* Release all locked channels so far, retry */ 3019 SLIST_FOREACH(sm_tmp, &sg->members, link) { 3020 /* sm is the member already locked */ 3021 if (sm == sm_tmp) 3022 break; 3023 CHN_UNLOCK(sm_tmp->ch); 3024 } 3025 3026 /** @todo Is PRIBIO correct/ */ 3027 ret = msleep(sm, &snd_pcm_syncgroups_mtx, 3028 PRIBIO | PCATCH, "pcmsg", timo); 3029 if (ret == EINTR || ret == ERESTART) 3030 break; 3031 3032 needlocks = 1; 3033 ret = 0; /* Assumes ret == EAGAIN... */ 3034 } 3035 } 3036 } while (needlocks && ret == 0); 3037 3038 /* Proceed only if no errors encountered. */ 3039 if (ret == 0) { 3040 /* Launch channels */ 3041 while ((sm = SLIST_FIRST(&sg->members)) != NULL) { 3042 SLIST_REMOVE_HEAD(&sg->members, link); 3043 3044 c = sm->ch; 3045 c->sm = NULL; 3046 chn_start(c, 1); 3047 c->flags &= ~CHN_F_NOTRIGGER; 3048 CHN_UNLOCK(c); 3049 3050 free(sm, M_DEVBUF); 3051 } 3052 3053 SLIST_REMOVE(&snd_pcm_syncgroups, sg, pcmchan_syncgroup, link); 3054 free(sg, M_DEVBUF); 3055 } 3056 3057 PCM_SG_UNLOCK(); 3058 3059 /* 3060 * Free_unr() may sleep, so be sure to give up the syncgroup lock 3061 * first. 3062 */ 3063 if (ret == 0) 3064 free_unr(pcmsg_unrhdr, sg_id); 3065 3066 return (ret); 3067 } 3068 3069 /** 3070 * @brief Handler for SNDCTL_DSP_POLICY 3071 * 3072 * The SNDCTL_DSP_POLICY ioctl is a simpler interface to control fragment 3073 * size and count like with SNDCTL_DSP_SETFRAGMENT. Instead of the user 3074 * specifying those two parameters, s/he simply selects a number from 0..10 3075 * which corresponds to a buffer size. Smaller numbers request smaller 3076 * buffers with lower latencies (at greater overhead from more frequent 3077 * interrupts), while greater numbers behave in the opposite manner. 3078 * 3079 * The 4Front spec states that a value of 5 should be the default. However, 3080 * this implementation deviates slightly by using a linear scale without 3081 * consulting drivers. I.e., even though drivers may have different default 3082 * buffer sizes, a policy argument of 5 will have the same result across 3083 * all drivers. 3084 * 3085 * See http://manuals.opensound.com/developer/SNDCTL_DSP_POLICY.html for 3086 * more information. 3087 * 3088 * @todo When SNDCTL_DSP_COOKEDMODE is supported, it'll be necessary to 3089 * work with hardware drivers directly. 3090 * 3091 * @note PCM channel arguments must not be locked by caller. 3092 * 3093 * @param wrch Pointer to opened playback channel (optional; may be NULL) 3094 * @param rdch " recording channel (optional; may be NULL) 3095 * @param policy Integer from [0:10] 3096 * 3097 * @retval 0 constant (for now) 3098 */ 3099 static int 3100 dsp_oss_policy(struct pcm_channel *wrch, struct pcm_channel *rdch, int policy) 3101 { 3102 int ret; 3103 3104 if (policy < CHN_POLICY_MIN || policy > CHN_POLICY_MAX) 3105 return (EIO); 3106 3107 /* Default: success */ 3108 ret = 0; 3109 3110 if (rdch) { 3111 CHN_LOCK(rdch); 3112 ret = chn_setlatency(rdch, policy); 3113 CHN_UNLOCK(rdch); 3114 } 3115 3116 if (wrch && ret == 0) { 3117 CHN_LOCK(wrch); 3118 ret = chn_setlatency(wrch, policy); 3119 CHN_UNLOCK(wrch); 3120 } 3121 3122 if (ret) 3123 ret = EIO; 3124 3125 return (ret); 3126 } 3127 3128 /** 3129 * @brief Enable or disable "cooked" mode 3130 * 3131 * This is a handler for @c SNDCTL_DSP_COOKEDMODE. When in cooked mode, which 3132 * is the default, the sound system handles rate and format conversions 3133 * automatically (ex: user writing 11025Hz/8 bit/unsigned but card only 3134 * operates with 44100Hz/16bit/signed samples). 3135 * 3136 * Disabling cooked mode is intended for applications wanting to mmap() 3137 * a sound card's buffer space directly, bypassing the FreeBSD 2-stage 3138 * feeder architecture, presumably to gain as much control over audio 3139 * hardware as possible. 3140 * 3141 * See @c http://manuals.opensound.com/developer/SNDCTL_DSP_COOKEDMODE.html 3142 * for more details. 3143 * 3144 * @param wrch playback channel (optional; may be NULL) 3145 * @param rdch recording channel (optional; may be NULL) 3146 * @param enabled 0 = raw mode, 1 = cooked mode 3147 * 3148 * @retval EINVAL Operation not yet supported. 3149 */ 3150 static int 3151 dsp_oss_cookedmode(struct pcm_channel *wrch, struct pcm_channel *rdch, int enabled) 3152 { 3153 3154 /* 3155 * XXX I just don't get it. Why don't they call it 3156 * "BITPERFECT" ~ SNDCTL_DSP_BITPERFECT !?!?. 3157 * This is just plain so confusing, incoherent, 3158 * <insert any non-printable characters here>. 3159 */ 3160 if (!(enabled == 1 || enabled == 0)) 3161 return (EINVAL); 3162 3163 /* 3164 * I won't give in. I'm inverting its logic here and now. 3165 * Brag all you want, but "BITPERFECT" should be the better 3166 * term here. 3167 */ 3168 enabled ^= 0x00000001; 3169 3170 if (wrch != NULL) { 3171 CHN_LOCK(wrch); 3172 wrch->flags &= ~CHN_F_BITPERFECT; 3173 wrch->flags |= (enabled != 0) ? CHN_F_BITPERFECT : 0x00000000; 3174 CHN_UNLOCK(wrch); 3175 } 3176 3177 if (rdch != NULL) { 3178 CHN_LOCK(rdch); 3179 rdch->flags &= ~CHN_F_BITPERFECT; 3180 rdch->flags |= (enabled != 0) ? CHN_F_BITPERFECT : 0x00000000; 3181 CHN_UNLOCK(rdch); 3182 } 3183 3184 return (0); 3185 } 3186 3187 /** 3188 * @brief Retrieve channel interleaving order 3189 * 3190 * This is the handler for @c SNDCTL_DSP_GET_CHNORDER. 3191 * 3192 * See @c http://manuals.opensound.com/developer/SNDCTL_DSP_GET_CHNORDER.html 3193 * for more details. 3194 * 3195 * @note As the ioctl definition is still under construction, FreeBSD 3196 * does not currently support SNDCTL_DSP_GET_CHNORDER. 3197 * 3198 * @param wrch playback channel (optional; may be NULL) 3199 * @param rdch recording channel (optional; may be NULL) 3200 * @param map channel map (result will be stored there) 3201 * 3202 * @retval EINVAL Operation not yet supported. 3203 */ 3204 static int 3205 dsp_oss_getchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map) 3206 { 3207 struct pcm_channel *ch; 3208 int ret; 3209 3210 ch = (wrch != NULL) ? wrch : rdch; 3211 if (ch != NULL) { 3212 CHN_LOCK(ch); 3213 ret = chn_oss_getorder(ch, map); 3214 CHN_UNLOCK(ch); 3215 } else 3216 ret = EINVAL; 3217 3218 return (ret); 3219 } 3220 3221 /** 3222 * @brief Specify channel interleaving order 3223 * 3224 * This is the handler for @c SNDCTL_DSP_SET_CHNORDER. 3225 * 3226 * @note As the ioctl definition is still under construction, FreeBSD 3227 * does not currently support @c SNDCTL_DSP_SET_CHNORDER. 3228 * 3229 * @param wrch playback channel (optional; may be NULL) 3230 * @param rdch recording channel (optional; may be NULL) 3231 * @param map channel map 3232 * 3233 * @retval EINVAL Operation not yet supported. 3234 */ 3235 static int 3236 dsp_oss_setchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map) 3237 { 3238 int ret; 3239 3240 ret = 0; 3241 3242 if (wrch != NULL) { 3243 CHN_LOCK(wrch); 3244 ret = chn_oss_setorder(wrch, map); 3245 CHN_UNLOCK(wrch); 3246 } 3247 3248 if (ret == 0 && rdch != NULL) { 3249 CHN_LOCK(rdch); 3250 ret = chn_oss_setorder(rdch, map); 3251 CHN_UNLOCK(rdch); 3252 } 3253 3254 return (ret); 3255 } 3256 3257 static int 3258 dsp_oss_getchannelmask(struct pcm_channel *wrch, struct pcm_channel *rdch, 3259 int *mask) 3260 { 3261 struct pcm_channel *ch; 3262 uint32_t chnmask; 3263 int ret; 3264 3265 chnmask = 0; 3266 ch = (wrch != NULL) ? wrch : rdch; 3267 3268 if (ch != NULL) { 3269 CHN_LOCK(ch); 3270 ret = chn_oss_getmask(ch, &chnmask); 3271 CHN_UNLOCK(ch); 3272 } else 3273 ret = EINVAL; 3274 3275 if (ret == 0) 3276 *mask = chnmask; 3277 3278 return (ret); 3279 } 3280 3281 #ifdef OSSV4_EXPERIMENT 3282 /** 3283 * @brief Retrieve an audio device's label 3284 * 3285 * This is a handler for the @c SNDCTL_GETLABEL ioctl. 3286 * 3287 * See @c http://manuals.opensound.com/developer/SNDCTL_GETLABEL.html 3288 * for more details. 3289 * 3290 * From Hannu@4Front: "For example ossxmix (just like some HW mixer 3291 * consoles) can show variable "labels" for certain controls. By default 3292 * the application name (say quake) is shown as the label but 3293 * applications may change the labels themselves." 3294 * 3295 * @note As the ioctl definition is still under construction, FreeBSD 3296 * does not currently support @c SNDCTL_GETLABEL. 3297 * 3298 * @param wrch playback channel (optional; may be NULL) 3299 * @param rdch recording channel (optional; may be NULL) 3300 * @param label label gets copied here 3301 * 3302 * @retval EINVAL Operation not yet supported. 3303 */ 3304 static int 3305 dsp_oss_getlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label) 3306 { 3307 return (EINVAL); 3308 } 3309 3310 /** 3311 * @brief Specify an audio device's label 3312 * 3313 * This is a handler for the @c SNDCTL_SETLABEL ioctl. Please see the 3314 * comments for @c dsp_oss_getlabel immediately above. 3315 * 3316 * See @c http://manuals.opensound.com/developer/SNDCTL_GETLABEL.html 3317 * for more details. 3318 * 3319 * @note As the ioctl definition is still under construction, FreeBSD 3320 * does not currently support SNDCTL_SETLABEL. 3321 * 3322 * @param wrch playback channel (optional; may be NULL) 3323 * @param rdch recording channel (optional; may be NULL) 3324 * @param label label gets copied from here 3325 * 3326 * @retval EINVAL Operation not yet supported. 3327 */ 3328 static int 3329 dsp_oss_setlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label) 3330 { 3331 return (EINVAL); 3332 } 3333 3334 /** 3335 * @brief Retrieve name of currently played song 3336 * 3337 * This is a handler for the @c SNDCTL_GETSONG ioctl. Audio players could 3338 * tell the system the name of the currently playing song, which would be 3339 * visible in @c /dev/sndstat. 3340 * 3341 * See @c http://manuals.opensound.com/developer/SNDCTL_GETSONG.html 3342 * for more details. 3343 * 3344 * @note As the ioctl definition is still under construction, FreeBSD 3345 * does not currently support SNDCTL_GETSONG. 3346 * 3347 * @param wrch playback channel (optional; may be NULL) 3348 * @param rdch recording channel (optional; may be NULL) 3349 * @param song song name gets copied here 3350 * 3351 * @retval EINVAL Operation not yet supported. 3352 */ 3353 static int 3354 dsp_oss_getsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song) 3355 { 3356 return (EINVAL); 3357 } 3358 3359 /** 3360 * @brief Retrieve name of currently played song 3361 * 3362 * This is a handler for the @c SNDCTL_SETSONG ioctl. Audio players could 3363 * tell the system the name of the currently playing song, which would be 3364 * visible in @c /dev/sndstat. 3365 * 3366 * See @c http://manuals.opensound.com/developer/SNDCTL_SETSONG.html 3367 * for more details. 3368 * 3369 * @note As the ioctl definition is still under construction, FreeBSD 3370 * does not currently support SNDCTL_SETSONG. 3371 * 3372 * @param wrch playback channel (optional; may be NULL) 3373 * @param rdch recording channel (optional; may be NULL) 3374 * @param song song name gets copied from here 3375 * 3376 * @retval EINVAL Operation not yet supported. 3377 */ 3378 static int 3379 dsp_oss_setsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song) 3380 { 3381 return (EINVAL); 3382 } 3383 3384 /** 3385 * @brief Rename a device 3386 * 3387 * This is a handler for the @c SNDCTL_SETNAME ioctl. 3388 * 3389 * See @c http://manuals.opensound.com/developer/SNDCTL_SETNAME.html for 3390 * more details. 3391 * 3392 * From Hannu@4Front: "This call is used to change the device name 3393 * reported in /dev/sndstat and ossinfo. So instead of using some generic 3394 * 'OSS loopback audio (MIDI) driver' the device may be given a meaningfull 3395 * name depending on the current context (for example 'OSS virtual wave table 3396 * synth' or 'VoIP link to London')." 3397 * 3398 * @note As the ioctl definition is still under construction, FreeBSD 3399 * does not currently support SNDCTL_SETNAME. 3400 * 3401 * @param wrch playback channel (optional; may be NULL) 3402 * @param rdch recording channel (optional; may be NULL) 3403 * @param name new device name gets copied from here 3404 * 3405 * @retval EINVAL Operation not yet supported. 3406 */ 3407 static int 3408 dsp_oss_setname(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *name) 3409 { 3410 return (EINVAL); 3411 } 3412 #endif /* !OSSV4_EXPERIMENT */ 3413