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