Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/dev/sound/pcm/dsp.c
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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 (void)snd_clone_unref(i_dev); 665 } 666 PCM_RELEASE(d); 667 } 668 669 pcm_unlock(d); 670 671 PCM_GIANT_LEAVE(d); 672 673 return (0); 674 } 675 676 static __inline int 677 dsp_io_ops(struct cdev *i_dev, struct uio *buf) 678 { 679 struct snddev_info *d; 680 struct pcm_channel **ch, *rdch, *wrch; 681 int (*chn_io)(struct pcm_channel *, struct uio *); 682 int prio, ret; 683 pid_t runpid; 684 685 KASSERT(i_dev != NULL && buf != NULL && 686 (buf->uio_rw == UIO_READ || buf->uio_rw == UIO_WRITE), 687 ("%s(): io train wreck!", __func__)); 688 689 d = dsp_get_info(i_dev); 690 if (!DSP_REGISTERED(d, i_dev)) 691 return (EBADF); 692 693 PCM_GIANT_ENTER(d); 694 695 switch (buf->uio_rw) { 696 case UIO_READ: 697 prio = SD_F_PRIO_RD; 698 ch = &rdch; 699 chn_io = chn_read; 700 break; 701 case UIO_WRITE: 702 prio = SD_F_PRIO_WR; 703 ch = &wrch; 704 chn_io = chn_write; 705 break; 706 default: 707 panic("invalid/corrupted uio direction: %d", buf->uio_rw); 708 break; 709 } 710 711 rdch = NULL; 712 wrch = NULL; 713 runpid = buf->uio_td->td_proc->p_pid; 714 715 getchns(i_dev, &rdch, &wrch, prio); 716 717 if (*ch == NULL || !((*ch)->flags & CHN_F_BUSY)) { 718 PCM_GIANT_EXIT(d); 719 return (EBADF); 720 } 721 722 if (((*ch)->flags & (CHN_F_MAPPED | CHN_F_DEAD)) || 723 (((*ch)->flags & CHN_F_RUNNING) && (*ch)->pid != runpid)) { 724 relchns(i_dev, rdch, wrch, prio); 725 PCM_GIANT_EXIT(d); 726 return (EINVAL); 727 } else if (!((*ch)->flags & CHN_F_RUNNING)) { 728 (*ch)->flags |= CHN_F_RUNNING; 729 (*ch)->pid = runpid; 730 } 731 732 /* 733 * chn_read/write must give up channel lock in order to copy bytes 734 * from/to userland, so up the "in progress" counter to make sure 735 * someone else doesn't come along and muss up the buffer. 736 */ 737 ++(*ch)->inprog; 738 ret = chn_io(*ch, buf); 739 --(*ch)->inprog; 740 741 CHN_BROADCAST(&(*ch)->cv); 742 743 relchns(i_dev, rdch, wrch, prio); 744 745 PCM_GIANT_LEAVE(d); 746 747 return (ret); 748 } 749 750 static int 751 dsp_read(struct cdev *i_dev, struct uio *buf, int flag) 752 { 753 return (dsp_io_ops(i_dev, buf)); 754 } 755 756 static int 757 dsp_write(struct cdev *i_dev, struct uio *buf, int flag) 758 { 759 return (dsp_io_ops(i_dev, buf)); 760 } 761 762 static int 763 dsp_ioctl(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode, struct thread *td) 764 { 765 struct pcm_channel *chn, *rdch, *wrch; 766 struct snddev_info *d; 767 int *arg_i, ret, kill, tmp, xcmd; 768 769 d = dsp_get_info(i_dev); 770 if (!DSP_REGISTERED(d, i_dev)) 771 return (EBADF); 772 773 PCM_GIANT_ENTER(d); 774 775 arg_i = (int *)arg; 776 ret = 0; 777 xcmd = 0; 778 779 /* 780 * this is an evil hack to allow broken apps to perform mixer ioctls 781 * on dsp devices. 782 */ 783 if (IOCGROUP(cmd) == 'M') { 784 /* 785 * This is at least, a bug to bug compatible with OSS. 786 */ 787 if (d->mixer_dev != NULL) { 788 PCM_ACQUIRE_QUICK(d); 789 ret = mixer_ioctl_cmd(d->mixer_dev, cmd, arg, -1, td, 790 MIXER_CMD_DIRECT); 791 PCM_RELEASE_QUICK(d); 792 } else 793 ret = EBADF; 794 795 PCM_GIANT_EXIT(d); 796 797 return (ret); 798 } 799 800 /* 801 * Certain ioctls may be made on any type of device (audio, mixer, 802 * and MIDI). Handle those special cases here. 803 */ 804 if (IOCGROUP(cmd) == 'X') { 805 PCM_ACQUIRE_QUICK(d); 806 switch(cmd) { 807 case SNDCTL_SYSINFO: 808 sound_oss_sysinfo((oss_sysinfo *)arg); 809 break; 810 case SNDCTL_AUDIOINFO: 811 ret = dsp_oss_audioinfo(i_dev, (oss_audioinfo *)arg); 812 break; 813 case SNDCTL_MIXERINFO: 814 ret = mixer_oss_mixerinfo(i_dev, (oss_mixerinfo *)arg); 815 break; 816 default: 817 ret = EINVAL; 818 } 819 PCM_RELEASE_QUICK(d); 820 PCM_GIANT_EXIT(d); 821 return (ret); 822 } 823 824 getchns(i_dev, &rdch, &wrch, 0); 825 826 kill = 0; 827 if (wrch && (wrch->flags & CHN_F_DEAD)) 828 kill |= 1; 829 if (rdch && (rdch->flags & CHN_F_DEAD)) 830 kill |= 2; 831 if (kill == 3) { 832 relchns(i_dev, rdch, wrch, 0); 833 PCM_GIANT_EXIT(d); 834 return (EINVAL); 835 } 836 if (kill & 1) 837 wrch = NULL; 838 if (kill & 2) 839 rdch = NULL; 840 841 if (wrch == NULL && rdch == NULL) { 842 relchns(i_dev, rdch, wrch, 0); 843 PCM_GIANT_EXIT(d); 844 return (EINVAL); 845 } 846 847 switch(cmd) { 848 #ifdef OLDPCM_IOCTL 849 /* 850 * we start with the new ioctl interface. 851 */ 852 case AIONWRITE: /* how many bytes can write ? */ 853 if (wrch) { 854 CHN_LOCK(wrch); 855 /* 856 if (wrch && wrch->bufhard.dl) 857 while (chn_wrfeed(wrch) == 0); 858 */ 859 *arg_i = sndbuf_getfree(wrch->bufsoft); 860 CHN_UNLOCK(wrch); 861 } else { 862 *arg_i = 0; 863 ret = EINVAL; 864 } 865 break; 866 867 case AIOSSIZE: /* set the current blocksize */ 868 { 869 struct snd_size *p = (struct snd_size *)arg; 870 871 p->play_size = 0; 872 p->rec_size = 0; 873 PCM_ACQUIRE_QUICK(d); 874 if (wrch) { 875 CHN_LOCK(wrch); 876 chn_setblocksize(wrch, 2, p->play_size); 877 p->play_size = sndbuf_getblksz(wrch->bufsoft); 878 CHN_UNLOCK(wrch); 879 } 880 if (rdch) { 881 CHN_LOCK(rdch); 882 chn_setblocksize(rdch, 2, p->rec_size); 883 p->rec_size = sndbuf_getblksz(rdch->bufsoft); 884 CHN_UNLOCK(rdch); 885 } 886 PCM_RELEASE_QUICK(d); 887 } 888 break; 889 case AIOGSIZE: /* get the current blocksize */ 890 { 891 struct snd_size *p = (struct snd_size *)arg; 892 893 if (wrch) { 894 CHN_LOCK(wrch); 895 p->play_size = sndbuf_getblksz(wrch->bufsoft); 896 CHN_UNLOCK(wrch); 897 } 898 if (rdch) { 899 CHN_LOCK(rdch); 900 p->rec_size = sndbuf_getblksz(rdch->bufsoft); 901 CHN_UNLOCK(rdch); 902 } 903 } 904 break; 905 906 case AIOSFMT: 907 case AIOGFMT: 908 { 909 snd_chan_param *p = (snd_chan_param *)arg; 910 911 if (cmd == AIOSFMT && 912 ((p->play_format != 0 && p->play_rate == 0) || 913 (p->rec_format != 0 && p->rec_rate == 0))) { 914 ret = EINVAL; 915 break; 916 } 917 PCM_ACQUIRE_QUICK(d); 918 if (wrch) { 919 CHN_LOCK(wrch); 920 if (cmd == AIOSFMT && p->play_format != 0) { 921 chn_setformat(wrch, p->play_format); 922 chn_setspeed(wrch, p->play_rate); 923 } 924 p->play_rate = wrch->speed; 925 p->play_format = wrch->format; 926 CHN_UNLOCK(wrch); 927 } else { 928 p->play_rate = 0; 929 p->play_format = 0; 930 } 931 if (rdch) { 932 CHN_LOCK(rdch); 933 if (cmd == AIOSFMT && p->rec_format != 0) { 934 chn_setformat(rdch, p->rec_format); 935 chn_setspeed(rdch, p->rec_rate); 936 } 937 p->rec_rate = rdch->speed; 938 p->rec_format = rdch->format; 939 CHN_UNLOCK(rdch); 940 } else { 941 p->rec_rate = 0; 942 p->rec_format = 0; 943 } 944 PCM_RELEASE_QUICK(d); 945 } 946 break; 947 948 case AIOGCAP: /* get capabilities */ 949 { 950 snd_capabilities *p = (snd_capabilities *)arg; 951 struct pcmchan_caps *pcaps = NULL, *rcaps = NULL; 952 struct cdev *pdev; 953 954 pcm_lock(d); 955 if (rdch) { 956 CHN_LOCK(rdch); 957 rcaps = chn_getcaps(rdch); 958 } 959 if (wrch) { 960 CHN_LOCK(wrch); 961 pcaps = chn_getcaps(wrch); 962 } 963 p->rate_min = max(rcaps? rcaps->minspeed : 0, 964 pcaps? pcaps->minspeed : 0); 965 p->rate_max = min(rcaps? rcaps->maxspeed : 1000000, 966 pcaps? pcaps->maxspeed : 1000000); 967 p->bufsize = min(rdch? sndbuf_getsize(rdch->bufsoft) : 1000000, 968 wrch? sndbuf_getsize(wrch->bufsoft) : 1000000); 969 /* XXX bad on sb16 */ 970 p->formats = (rdch? chn_getformats(rdch) : 0xffffffff) & 971 (wrch? chn_getformats(wrch) : 0xffffffff); 972 if (rdch && wrch) 973 p->formats |= (dsp_get_flags(i_dev) & SD_F_SIMPLEX)? 0 : AFMT_FULLDUPLEX; 974 pdev = d->mixer_dev; 975 p->mixers = 1; /* default: one mixer */ 976 p->inputs = pdev->si_drv1? mix_getdevs(pdev->si_drv1) : 0; 977 p->left = p->right = 100; 978 if (wrch) 979 CHN_UNLOCK(wrch); 980 if (rdch) 981 CHN_UNLOCK(rdch); 982 pcm_unlock(d); 983 } 984 break; 985 986 case AIOSTOP: 987 if (*arg_i == AIOSYNC_PLAY && wrch) { 988 CHN_LOCK(wrch); 989 *arg_i = chn_abort(wrch); 990 CHN_UNLOCK(wrch); 991 } else if (*arg_i == AIOSYNC_CAPTURE && rdch) { 992 CHN_LOCK(rdch); 993 *arg_i = chn_abort(rdch); 994 CHN_UNLOCK(rdch); 995 } else { 996 printf("AIOSTOP: bad channel 0x%x\n", *arg_i); 997 *arg_i = 0; 998 } 999 break; 1000 1001 case AIOSYNC: 1002 printf("AIOSYNC chan 0x%03lx pos %lu unimplemented\n", 1003 ((snd_sync_parm *)arg)->chan, ((snd_sync_parm *)arg)->pos); 1004 break; 1005 #endif 1006 /* 1007 * here follow the standard ioctls (filio.h etc.) 1008 */ 1009 case FIONREAD: /* get # bytes to read */ 1010 if (rdch) { 1011 CHN_LOCK(rdch); 1012 /* if (rdch && rdch->bufhard.dl) 1013 while (chn_rdfeed(rdch) == 0); 1014 */ 1015 *arg_i = sndbuf_getready(rdch->bufsoft); 1016 CHN_UNLOCK(rdch); 1017 } else { 1018 *arg_i = 0; 1019 ret = EINVAL; 1020 } 1021 break; 1022 1023 case FIOASYNC: /*set/clear async i/o */ 1024 DEB( printf("FIOASYNC\n") ; ) 1025 break; 1026 1027 case SNDCTL_DSP_NONBLOCK: /* set non-blocking i/o */ 1028 case FIONBIO: /* set/clear non-blocking i/o */ 1029 if (rdch) { 1030 CHN_LOCK(rdch); 1031 if (cmd == SNDCTL_DSP_NONBLOCK || *arg_i) 1032 rdch->flags |= CHN_F_NBIO; 1033 else 1034 rdch->flags &= ~CHN_F_NBIO; 1035 CHN_UNLOCK(rdch); 1036 } 1037 if (wrch) { 1038 CHN_LOCK(wrch); 1039 if (cmd == SNDCTL_DSP_NONBLOCK || *arg_i) 1040 wrch->flags |= CHN_F_NBIO; 1041 else 1042 wrch->flags &= ~CHN_F_NBIO; 1043 CHN_UNLOCK(wrch); 1044 } 1045 break; 1046 1047 /* 1048 * Finally, here is the linux-compatible ioctl interface 1049 */ 1050 #define THE_REAL_SNDCTL_DSP_GETBLKSIZE _IOWR('P', 4, int) 1051 case THE_REAL_SNDCTL_DSP_GETBLKSIZE: 1052 case SNDCTL_DSP_GETBLKSIZE: 1053 chn = wrch ? wrch : rdch; 1054 if (chn) { 1055 CHN_LOCK(chn); 1056 *arg_i = sndbuf_getblksz(chn->bufsoft); 1057 CHN_UNLOCK(chn); 1058 } else { 1059 *arg_i = 0; 1060 ret = EINVAL; 1061 } 1062 break; 1063 1064 case SNDCTL_DSP_SETBLKSIZE: 1065 RANGE(*arg_i, 16, 65536); 1066 PCM_ACQUIRE_QUICK(d); 1067 if (wrch) { 1068 CHN_LOCK(wrch); 1069 chn_setblocksize(wrch, 2, *arg_i); 1070 CHN_UNLOCK(wrch); 1071 } 1072 if (rdch) { 1073 CHN_LOCK(rdch); 1074 chn_setblocksize(rdch, 2, *arg_i); 1075 CHN_UNLOCK(rdch); 1076 } 1077 PCM_RELEASE_QUICK(d); 1078 break; 1079 1080 case SNDCTL_DSP_RESET: 1081 DEB(printf("dsp reset\n")); 1082 if (wrch) { 1083 CHN_LOCK(wrch); 1084 chn_abort(wrch); 1085 chn_resetbuf(wrch); 1086 CHN_UNLOCK(wrch); 1087 } 1088 if (rdch) { 1089 CHN_LOCK(rdch); 1090 chn_abort(rdch); 1091 chn_resetbuf(rdch); 1092 CHN_UNLOCK(rdch); 1093 } 1094 break; 1095 1096 case SNDCTL_DSP_SYNC: 1097 DEB(printf("dsp sync\n")); 1098 /* chn_sync may sleep */ 1099 if (wrch) { 1100 CHN_LOCK(wrch); 1101 chn_sync(wrch, 0); 1102 CHN_UNLOCK(wrch); 1103 } 1104 break; 1105 1106 case SNDCTL_DSP_SPEED: 1107 /* chn_setspeed may sleep */ 1108 tmp = 0; 1109 PCM_ACQUIRE_QUICK(d); 1110 if (wrch) { 1111 CHN_LOCK(wrch); 1112 ret = chn_setspeed(wrch, *arg_i); 1113 tmp = wrch->speed; 1114 CHN_UNLOCK(wrch); 1115 } 1116 if (rdch && ret == 0) { 1117 CHN_LOCK(rdch); 1118 ret = chn_setspeed(rdch, *arg_i); 1119 if (tmp == 0) 1120 tmp = rdch->speed; 1121 CHN_UNLOCK(rdch); 1122 } 1123 PCM_RELEASE_QUICK(d); 1124 *arg_i = tmp; 1125 break; 1126 1127 case SOUND_PCM_READ_RATE: 1128 chn = wrch ? wrch : rdch; 1129 if (chn) { 1130 CHN_LOCK(chn); 1131 *arg_i = chn->speed; 1132 CHN_UNLOCK(chn); 1133 } else { 1134 *arg_i = 0; 1135 ret = EINVAL; 1136 } 1137 break; 1138 1139 case SNDCTL_DSP_STEREO: 1140 tmp = -1; 1141 *arg_i = (*arg_i)? AFMT_STEREO : 0; 1142 PCM_ACQUIRE_QUICK(d); 1143 if (wrch) { 1144 CHN_LOCK(wrch); 1145 ret = chn_setformat(wrch, (wrch->format & ~AFMT_STEREO) | *arg_i); 1146 tmp = (wrch->format & AFMT_STEREO)? 1 : 0; 1147 CHN_UNLOCK(wrch); 1148 } 1149 if (rdch && ret == 0) { 1150 CHN_LOCK(rdch); 1151 ret = chn_setformat(rdch, (rdch->format & ~AFMT_STEREO) | *arg_i); 1152 if (tmp == -1) 1153 tmp = (rdch->format & AFMT_STEREO)? 1 : 0; 1154 CHN_UNLOCK(rdch); 1155 } 1156 PCM_RELEASE_QUICK(d); 1157 *arg_i = tmp; 1158 break; 1159 1160 case SOUND_PCM_WRITE_CHANNELS: 1161 /* case SNDCTL_DSP_CHANNELS: ( == SOUND_PCM_WRITE_CHANNELS) */ 1162 if (*arg_i != 0) { 1163 tmp = 0; 1164 *arg_i = (*arg_i != 1)? AFMT_STEREO : 0; 1165 PCM_ACQUIRE_QUICK(d); 1166 if (wrch) { 1167 CHN_LOCK(wrch); 1168 ret = chn_setformat(wrch, (wrch->format & ~AFMT_STEREO) | *arg_i); 1169 tmp = (wrch->format & AFMT_STEREO)? 2 : 1; 1170 CHN_UNLOCK(wrch); 1171 } 1172 if (rdch && ret == 0) { 1173 CHN_LOCK(rdch); 1174 ret = chn_setformat(rdch, (rdch->format & ~AFMT_STEREO) | *arg_i); 1175 if (tmp == 0) 1176 tmp = (rdch->format & AFMT_STEREO)? 2 : 1; 1177 CHN_UNLOCK(rdch); 1178 } 1179 PCM_RELEASE_QUICK(d); 1180 *arg_i = tmp; 1181 } else { 1182 chn = wrch ? wrch : rdch; 1183 CHN_LOCK(chn); 1184 *arg_i = (chn->format & AFMT_STEREO) ? 2 : 1; 1185 CHN_UNLOCK(chn); 1186 } 1187 break; 1188 1189 case SOUND_PCM_READ_CHANNELS: 1190 chn = wrch ? wrch : rdch; 1191 if (chn) { 1192 CHN_LOCK(chn); 1193 *arg_i = (chn->format & AFMT_STEREO) ? 2 : 1; 1194 CHN_UNLOCK(chn); 1195 } else { 1196 *arg_i = 0; 1197 ret = EINVAL; 1198 } 1199 break; 1200 1201 case SNDCTL_DSP_GETFMTS: /* returns a mask of supported fmts */ 1202 chn = wrch ? wrch : rdch; 1203 if (chn) { 1204 CHN_LOCK(chn); 1205 *arg_i = chn_getformats(chn); 1206 CHN_UNLOCK(chn); 1207 } else { 1208 *arg_i = 0; 1209 ret = EINVAL; 1210 } 1211 break; 1212 1213 case SNDCTL_DSP_SETFMT: /* sets _one_ format */ 1214 if ((*arg_i != AFMT_QUERY)) { 1215 tmp = 0; 1216 PCM_ACQUIRE_QUICK(d); 1217 if (wrch) { 1218 CHN_LOCK(wrch); 1219 ret = chn_setformat(wrch, (*arg_i) | (wrch->format & AFMT_STEREO)); 1220 tmp = wrch->format & ~AFMT_STEREO; 1221 CHN_UNLOCK(wrch); 1222 } 1223 if (rdch && ret == 0) { 1224 CHN_LOCK(rdch); 1225 ret = chn_setformat(rdch, (*arg_i) | (rdch->format & AFMT_STEREO)); 1226 if (tmp == 0) 1227 tmp = rdch->format & ~AFMT_STEREO; 1228 CHN_UNLOCK(rdch); 1229 } 1230 PCM_RELEASE_QUICK(d); 1231 *arg_i = tmp; 1232 } else { 1233 chn = wrch ? wrch : rdch; 1234 CHN_LOCK(chn); 1235 *arg_i = chn->format & ~AFMT_STEREO; 1236 CHN_UNLOCK(chn); 1237 } 1238 break; 1239 1240 case SNDCTL_DSP_SETFRAGMENT: 1241 DEB(printf("SNDCTL_DSP_SETFRAGMENT 0x%08x\n", *(int *)arg)); 1242 { 1243 uint32_t fragln = (*arg_i) & 0x0000ffff; 1244 uint32_t maxfrags = ((*arg_i) & 0xffff0000) >> 16; 1245 uint32_t fragsz; 1246 uint32_t r_maxfrags, r_fragsz; 1247 1248 RANGE(fragln, 4, 16); 1249 fragsz = 1 << fragln; 1250 1251 if (maxfrags == 0) 1252 maxfrags = CHN_2NDBUFMAXSIZE / fragsz; 1253 if (maxfrags < 2) 1254 maxfrags = 2; 1255 if (maxfrags * fragsz > CHN_2NDBUFMAXSIZE) 1256 maxfrags = CHN_2NDBUFMAXSIZE / fragsz; 1257 1258 DEB(printf("SNDCTL_DSP_SETFRAGMENT %d frags, %d sz\n", maxfrags, fragsz)); 1259 PCM_ACQUIRE_QUICK(d); 1260 if (rdch) { 1261 CHN_LOCK(rdch); 1262 ret = chn_setblocksize(rdch, maxfrags, fragsz); 1263 r_maxfrags = sndbuf_getblkcnt(rdch->bufsoft); 1264 r_fragsz = sndbuf_getblksz(rdch->bufsoft); 1265 CHN_UNLOCK(rdch); 1266 } else { 1267 r_maxfrags = maxfrags; 1268 r_fragsz = fragsz; 1269 } 1270 if (wrch && ret == 0) { 1271 CHN_LOCK(wrch); 1272 ret = chn_setblocksize(wrch, maxfrags, fragsz); 1273 maxfrags = sndbuf_getblkcnt(wrch->bufsoft); 1274 fragsz = sndbuf_getblksz(wrch->bufsoft); 1275 CHN_UNLOCK(wrch); 1276 } else { /* use whatever came from the read channel */ 1277 maxfrags = r_maxfrags; 1278 fragsz = r_fragsz; 1279 } 1280 PCM_RELEASE_QUICK(d); 1281 1282 fragln = 0; 1283 while (fragsz > 1) { 1284 fragln++; 1285 fragsz >>= 1; 1286 } 1287 *arg_i = (maxfrags << 16) | fragln; 1288 } 1289 break; 1290 1291 case SNDCTL_DSP_GETISPACE: 1292 /* return the size of data available in the input queue */ 1293 { 1294 audio_buf_info *a = (audio_buf_info *)arg; 1295 if (rdch) { 1296 struct snd_dbuf *bs = rdch->bufsoft; 1297 1298 CHN_LOCK(rdch); 1299 a->bytes = sndbuf_getready(bs); 1300 a->fragments = a->bytes / sndbuf_getblksz(bs); 1301 a->fragstotal = sndbuf_getblkcnt(bs); 1302 a->fragsize = sndbuf_getblksz(bs); 1303 CHN_UNLOCK(rdch); 1304 } else 1305 ret = EINVAL; 1306 } 1307 break; 1308 1309 case SNDCTL_DSP_GETOSPACE: 1310 /* return space available in the output queue */ 1311 { 1312 audio_buf_info *a = (audio_buf_info *)arg; 1313 if (wrch) { 1314 struct snd_dbuf *bs = wrch->bufsoft; 1315 1316 CHN_LOCK(wrch); 1317 /* XXX abusive DMA update: chn_wrupdate(wrch); */ 1318 a->bytes = sndbuf_getfree(bs); 1319 a->fragments = a->bytes / sndbuf_getblksz(bs); 1320 a->fragstotal = sndbuf_getblkcnt(bs); 1321 a->fragsize = sndbuf_getblksz(bs); 1322 CHN_UNLOCK(wrch); 1323 } else 1324 ret = EINVAL; 1325 } 1326 break; 1327 1328 case SNDCTL_DSP_GETIPTR: 1329 { 1330 count_info *a = (count_info *)arg; 1331 if (rdch) { 1332 struct snd_dbuf *bs = rdch->bufsoft; 1333 1334 CHN_LOCK(rdch); 1335 /* XXX abusive DMA update: chn_rdupdate(rdch); */ 1336 a->bytes = sndbuf_gettotal(bs); 1337 a->blocks = sndbuf_getblocks(bs) - rdch->blocks; 1338 a->ptr = sndbuf_getreadyptr(bs); 1339 rdch->blocks = sndbuf_getblocks(bs); 1340 CHN_UNLOCK(rdch); 1341 } else 1342 ret = EINVAL; 1343 } 1344 break; 1345 1346 case SNDCTL_DSP_GETOPTR: 1347 { 1348 count_info *a = (count_info *)arg; 1349 if (wrch) { 1350 struct snd_dbuf *bs = wrch->bufsoft; 1351 1352 CHN_LOCK(wrch); 1353 /* XXX abusive DMA update: chn_wrupdate(wrch); */ 1354 a->bytes = sndbuf_gettotal(bs); 1355 a->blocks = sndbuf_getblocks(bs) - wrch->blocks; 1356 a->ptr = sndbuf_getreadyptr(bs); 1357 wrch->blocks = sndbuf_getblocks(bs); 1358 CHN_UNLOCK(wrch); 1359 } else 1360 ret = EINVAL; 1361 } 1362 break; 1363 1364 case SNDCTL_DSP_GETCAPS: 1365 pcm_lock(d); 1366 *arg_i = DSP_CAP_REALTIME | DSP_CAP_MMAP | DSP_CAP_TRIGGER; 1367 if (rdch && wrch && !(dsp_get_flags(i_dev) & SD_F_SIMPLEX)) 1368 *arg_i |= DSP_CAP_DUPLEX; 1369 pcm_unlock(d); 1370 break; 1371 1372 case SOUND_PCM_READ_BITS: 1373 chn = wrch ? wrch : rdch; 1374 if (chn) { 1375 CHN_LOCK(chn); 1376 if (chn->format & AFMT_8BIT) 1377 *arg_i = 8; 1378 else if (chn->format & AFMT_16BIT) 1379 *arg_i = 16; 1380 else if (chn->format & AFMT_24BIT) 1381 *arg_i = 24; 1382 else if (chn->format & AFMT_32BIT) 1383 *arg_i = 32; 1384 else 1385 ret = EINVAL; 1386 CHN_UNLOCK(chn); 1387 } else { 1388 *arg_i = 0; 1389 ret = EINVAL; 1390 } 1391 break; 1392 1393 case SNDCTL_DSP_SETTRIGGER: 1394 if (rdch) { 1395 CHN_LOCK(rdch); 1396 rdch->flags &= ~(CHN_F_TRIGGERED | CHN_F_NOTRIGGER); 1397 if (*arg_i & PCM_ENABLE_INPUT) 1398 chn_start(rdch, 1); 1399 else 1400 rdch->flags |= CHN_F_NOTRIGGER; 1401 CHN_UNLOCK(rdch); 1402 } 1403 if (wrch) { 1404 CHN_LOCK(wrch); 1405 wrch->flags &= ~(CHN_F_TRIGGERED | CHN_F_NOTRIGGER); 1406 if (*arg_i & PCM_ENABLE_OUTPUT) 1407 chn_start(wrch, 1); 1408 else 1409 wrch->flags |= CHN_F_NOTRIGGER; 1410 CHN_UNLOCK(wrch); 1411 } 1412 break; 1413 1414 case SNDCTL_DSP_GETTRIGGER: 1415 *arg_i = 0; 1416 if (wrch) { 1417 CHN_LOCK(wrch); 1418 if (wrch->flags & CHN_F_TRIGGERED) 1419 *arg_i |= PCM_ENABLE_OUTPUT; 1420 CHN_UNLOCK(wrch); 1421 } 1422 if (rdch) { 1423 CHN_LOCK(rdch); 1424 if (rdch->flags & CHN_F_TRIGGERED) 1425 *arg_i |= PCM_ENABLE_INPUT; 1426 CHN_UNLOCK(rdch); 1427 } 1428 break; 1429 1430 case SNDCTL_DSP_GETODELAY: 1431 if (wrch) { 1432 struct snd_dbuf *bs = wrch->bufsoft; 1433 1434 CHN_LOCK(wrch); 1435 /* XXX abusive DMA update: chn_wrupdate(wrch); */ 1436 *arg_i = sndbuf_getready(bs); 1437 CHN_UNLOCK(wrch); 1438 } else 1439 ret = EINVAL; 1440 break; 1441 1442 case SNDCTL_DSP_POST: 1443 if (wrch) { 1444 CHN_LOCK(wrch); 1445 wrch->flags &= ~CHN_F_NOTRIGGER; 1446 chn_start(wrch, 1); 1447 CHN_UNLOCK(wrch); 1448 } 1449 break; 1450 1451 case SNDCTL_DSP_SETDUPLEX: 1452 /* 1453 * switch to full-duplex mode if card is in half-duplex 1454 * mode and is able to work in full-duplex mode 1455 */ 1456 pcm_lock(d); 1457 if (rdch && wrch && (dsp_get_flags(i_dev) & SD_F_SIMPLEX)) 1458 dsp_set_flags(i_dev, dsp_get_flags(i_dev)^SD_F_SIMPLEX); 1459 pcm_unlock(d); 1460 break; 1461 1462 /* 1463 * The following four ioctls are simple wrappers around mixer_ioctl 1464 * with no further processing. xcmd is short for "translated 1465 * command". 1466 */ 1467 case SNDCTL_DSP_GETRECVOL: 1468 if (xcmd == 0) 1469 xcmd = SOUND_MIXER_READ_RECLEV; 1470 /* FALLTHROUGH */ 1471 case SNDCTL_DSP_SETRECVOL: 1472 if (xcmd == 0) 1473 xcmd = SOUND_MIXER_WRITE_RECLEV; 1474 /* FALLTHROUGH */ 1475 case SNDCTL_DSP_GETPLAYVOL: 1476 if (xcmd == 0) 1477 xcmd = SOUND_MIXER_READ_PCM; 1478 /* FALLTHROUGH */ 1479 case SNDCTL_DSP_SETPLAYVOL: 1480 if (xcmd == 0) 1481 xcmd = SOUND_MIXER_WRITE_PCM; 1482 1483 if (d->mixer_dev != NULL) { 1484 PCM_ACQUIRE_QUICK(d); 1485 ret = mixer_ioctl_cmd(d->mixer_dev, xcmd, arg, -1, td, 1486 MIXER_CMD_DIRECT); 1487 PCM_RELEASE_QUICK(d); 1488 } else 1489 ret = ENOTSUP; 1490 break; 1491 1492 case SNDCTL_DSP_GET_RECSRC_NAMES: 1493 case SNDCTL_DSP_GET_RECSRC: 1494 case SNDCTL_DSP_SET_RECSRC: 1495 if (d->mixer_dev != NULL) { 1496 PCM_ACQUIRE_QUICK(d); 1497 ret = mixer_ioctl_cmd(d->mixer_dev, cmd, arg, -1, td, 1498 MIXER_CMD_DIRECT); 1499 PCM_RELEASE_QUICK(d); 1500 } else 1501 ret = ENOTSUP; 1502 break; 1503 1504 /* 1505 * The following 3 ioctls aren't very useful at the moment. For 1506 * now, only a single channel is associated with a cdev (/dev/dspN 1507 * instance), so there's only a single output routing to use (i.e., 1508 * the wrch bound to this cdev). 1509 */ 1510 case SNDCTL_DSP_GET_PLAYTGT_NAMES: 1511 { 1512 oss_mixer_enuminfo *ei; 1513 ei = (oss_mixer_enuminfo *)arg; 1514 ei->dev = 0; 1515 ei->ctrl = 0; 1516 ei->version = 0; /* static for now */ 1517 ei->strindex[0] = 0; 1518 1519 if (wrch != NULL) { 1520 ei->nvalues = 1; 1521 strlcpy(ei->strings, wrch->name, 1522 sizeof(ei->strings)); 1523 } else { 1524 ei->nvalues = 0; 1525 ei->strings[0] = '\0'; 1526 } 1527 } 1528 break; 1529 case SNDCTL_DSP_GET_PLAYTGT: 1530 case SNDCTL_DSP_SET_PLAYTGT: /* yes, they are the same for now */ 1531 /* 1532 * Re: SET_PLAYTGT 1533 * OSSv4: "The value that was accepted by the device will 1534 * be returned back in the variable pointed by the 1535 * argument." 1536 */ 1537 if (wrch != NULL) 1538 *arg_i = 0; 1539 else 1540 ret = EINVAL; 1541 break; 1542 1543 case SNDCTL_DSP_SILENCE: 1544 /* 1545 * Flush the software (pre-feed) buffer, but try to minimize playback 1546 * interruption. (I.e., record unplayed samples with intent to 1547 * restore by SNDCTL_DSP_SKIP.) Intended for application "pause" 1548 * functionality. 1549 */ 1550 if (wrch == NULL) 1551 ret = EINVAL; 1552 else { 1553 struct snd_dbuf *bs; 1554 CHN_LOCK(wrch); 1555 while (wrch->inprog != 0) 1556 cv_wait(&wrch->cv, wrch->lock); 1557 bs = wrch->bufsoft; 1558 if ((bs->shadbuf != NULL) && (sndbuf_getready(bs) > 0)) { 1559 bs->sl = sndbuf_getready(bs); 1560 sndbuf_dispose(bs, bs->shadbuf, sndbuf_getready(bs)); 1561 sndbuf_fillsilence(bs); 1562 chn_start(wrch, 0); 1563 } 1564 CHN_UNLOCK(wrch); 1565 } 1566 break; 1567 1568 case SNDCTL_DSP_SKIP: 1569 /* 1570 * OSSv4 docs: "This ioctl call discards all unplayed samples in the 1571 * playback buffer by moving the current write position immediately 1572 * before the point where the device is currently reading the samples." 1573 */ 1574 if (wrch == NULL) 1575 ret = EINVAL; 1576 else { 1577 struct snd_dbuf *bs; 1578 CHN_LOCK(wrch); 1579 while (wrch->inprog != 0) 1580 cv_wait(&wrch->cv, wrch->lock); 1581 bs = wrch->bufsoft; 1582 if ((bs->shadbuf != NULL) && (bs->sl > 0)) { 1583 sndbuf_softreset(bs); 1584 sndbuf_acquire(bs, bs->shadbuf, bs->sl); 1585 bs->sl = 0; 1586 chn_start(wrch, 0); 1587 } 1588 CHN_UNLOCK(wrch); 1589 } 1590 break; 1591 1592 case SNDCTL_DSP_CURRENT_OPTR: 1593 case SNDCTL_DSP_CURRENT_IPTR: 1594 /** 1595 * @note Changing formats resets the buffer counters, which differs 1596 * from the 4Front drivers. However, I don't expect this to be 1597 * much of a problem. 1598 * 1599 * @note In a test where @c CURRENT_OPTR is called immediately after write 1600 * returns, this driver is about 32K samples behind whereas 1601 * 4Front's is about 8K samples behind. Should determine source 1602 * of discrepancy, even if only out of curiosity. 1603 * 1604 * @todo Actually test SNDCTL_DSP_CURRENT_IPTR. 1605 */ 1606 chn = (cmd == SNDCTL_DSP_CURRENT_OPTR) ? wrch : rdch; 1607 if (chn == NULL) 1608 ret = EINVAL; 1609 else { 1610 struct snd_dbuf *bs; 1611 /* int tmp; */ 1612 1613 oss_count_t *oc = (oss_count_t *)arg; 1614 1615 CHN_LOCK(chn); 1616 bs = chn->bufsoft; 1617 #if 0 1618 tmp = (sndbuf_getsize(b) + chn_getptr(chn) - sndbuf_gethwptr(b)) % sndbuf_getsize(b); 1619 oc->samples = (sndbuf_gettotal(b) + tmp) / sndbuf_getbps(b); 1620 oc->fifo_samples = (sndbuf_getready(b) - tmp) / sndbuf_getbps(b); 1621 #else 1622 oc->samples = sndbuf_gettotal(bs) / sndbuf_getbps(bs); 1623 oc->fifo_samples = sndbuf_getready(bs) / sndbuf_getbps(bs); 1624 #endif 1625 CHN_UNLOCK(chn); 1626 } 1627 break; 1628 1629 case SNDCTL_DSP_HALT_OUTPUT: 1630 case SNDCTL_DSP_HALT_INPUT: 1631 chn = (cmd == SNDCTL_DSP_HALT_OUTPUT) ? wrch : rdch; 1632 if (chn == NULL) 1633 ret = EINVAL; 1634 else { 1635 CHN_LOCK(chn); 1636 chn_abort(chn); 1637 CHN_UNLOCK(chn); 1638 } 1639 break; 1640 1641 case SNDCTL_DSP_LOW_WATER: 1642 /* 1643 * Set the number of bytes required to attract attention by 1644 * select/poll. 1645 */ 1646 if (wrch != NULL) { 1647 CHN_LOCK(wrch); 1648 wrch->lw = (*arg_i > 1) ? *arg_i : 1; 1649 CHN_UNLOCK(wrch); 1650 } 1651 if (rdch != NULL) { 1652 CHN_LOCK(rdch); 1653 rdch->lw = (*arg_i > 1) ? *arg_i : 1; 1654 CHN_UNLOCK(rdch); 1655 } 1656 break; 1657 1658 case SNDCTL_DSP_GETERROR: 1659 /* 1660 * OSSv4 docs: "All errors and counters will automatically be 1661 * cleared to zeroes after the call so each call will return only 1662 * the errors that occurred after the previous invocation. ... The 1663 * play_underruns and rec_overrun fields are the only usefull fields 1664 * returned by OSS 4.0." 1665 */ 1666 { 1667 audio_errinfo *ei = (audio_errinfo *)arg; 1668 1669 bzero((void *)ei, sizeof(*ei)); 1670 1671 if (wrch != NULL) { 1672 CHN_LOCK(wrch); 1673 ei->play_underruns = wrch->xruns; 1674 wrch->xruns = 0; 1675 CHN_UNLOCK(wrch); 1676 } 1677 if (rdch != NULL) { 1678 CHN_LOCK(rdch); 1679 ei->rec_overruns = rdch->xruns; 1680 rdch->xruns = 0; 1681 CHN_UNLOCK(rdch); 1682 } 1683 } 1684 break; 1685 1686 case SNDCTL_DSP_SYNCGROUP: 1687 PCM_ACQUIRE_QUICK(d); 1688 ret = dsp_oss_syncgroup(wrch, rdch, (oss_syncgroup *)arg); 1689 PCM_RELEASE_QUICK(d); 1690 break; 1691 1692 case SNDCTL_DSP_SYNCSTART: 1693 PCM_ACQUIRE_QUICK(d); 1694 ret = dsp_oss_syncstart(*arg_i); 1695 PCM_RELEASE_QUICK(d); 1696 break; 1697 1698 case SNDCTL_DSP_POLICY: 1699 PCM_ACQUIRE_QUICK(d); 1700 ret = dsp_oss_policy(wrch, rdch, *arg_i); 1701 PCM_RELEASE_QUICK(d); 1702 break; 1703 1704 #ifdef OSSV4_EXPERIMENT 1705 /* 1706 * XXX The following ioctls are not yet supported and just return 1707 * EINVAL. 1708 */ 1709 case SNDCTL_DSP_GETOPEAKS: 1710 case SNDCTL_DSP_GETIPEAKS: 1711 chn = (cmd == SNDCTL_DSP_GETOPEAKS) ? wrch : rdch; 1712 if (chn == NULL) 1713 ret = EINVAL; 1714 else { 1715 oss_peaks_t *op = (oss_peaks_t *)arg; 1716 int lpeak, rpeak; 1717 1718 CHN_LOCK(chn); 1719 ret = chn_getpeaks(chn, &lpeak, &rpeak); 1720 if (ret == -1) 1721 ret = EINVAL; 1722 else { 1723 (*op)[0] = lpeak; 1724 (*op)[1] = rpeak; 1725 } 1726 CHN_UNLOCK(chn); 1727 } 1728 break; 1729 1730 /* 1731 * XXX Once implemented, revisit this for proper cv protection 1732 * (if necessary). 1733 */ 1734 case SNDCTL_DSP_COOKEDMODE: 1735 ret = dsp_oss_cookedmode(wrch, rdch, *arg_i); 1736 break; 1737 case SNDCTL_DSP_GET_CHNORDER: 1738 ret = dsp_oss_getchnorder(wrch, rdch, (unsigned long long *)arg); 1739 break; 1740 case SNDCTL_DSP_SET_CHNORDER: 1741 ret = dsp_oss_setchnorder(wrch, rdch, (unsigned long long *)arg); 1742 break; 1743 case SNDCTL_GETLABEL: 1744 ret = dsp_oss_getlabel(wrch, rdch, (oss_label_t *)arg); 1745 break; 1746 case SNDCTL_SETLABEL: 1747 ret = dsp_oss_setlabel(wrch, rdch, (oss_label_t *)arg); 1748 break; 1749 case SNDCTL_GETSONG: 1750 ret = dsp_oss_getsong(wrch, rdch, (oss_longname_t *)arg); 1751 break; 1752 case SNDCTL_SETSONG: 1753 ret = dsp_oss_setsong(wrch, rdch, (oss_longname_t *)arg); 1754 break; 1755 case SNDCTL_SETNAME: 1756 ret = dsp_oss_setname(wrch, rdch, (oss_longname_t *)arg); 1757 break; 1758 #if 0 1759 /** 1760 * @note The SNDCTL_CARDINFO ioctl was omitted per 4Front developer 1761 * documentation. "The usability of this call is very limited. It's 1762 * provided only for completeness of the API. OSS API doesn't have 1763 * any concept of card. Any information returned by this ioctl calld 1764 * is reserved exclusively for the utility programs included in the 1765 * OSS package. Applications should not try to use for this 1766 * information in any ways." 1767 */ 1768 case SNDCTL_CARDINFO: 1769 ret = EINVAL; 1770 break; 1771 /** 1772 * @note The S/PDIF interface ioctls, @c SNDCTL_DSP_READCTL and 1773 * @c SNDCTL_DSP_WRITECTL have been omitted at the suggestion of 1774 * 4Front Technologies. 1775 */ 1776 case SNDCTL_DSP_READCTL: 1777 case SNDCTL_DSP_WRITECTL: 1778 ret = EINVAL; 1779 break; 1780 #endif /* !0 (explicitly omitted ioctls) */ 1781 1782 #endif /* !OSSV4_EXPERIMENT */ 1783 case SNDCTL_DSP_MAPINBUF: 1784 case SNDCTL_DSP_MAPOUTBUF: 1785 case SNDCTL_DSP_SETSYNCRO: 1786 /* undocumented */ 1787 1788 case SNDCTL_DSP_SUBDIVIDE: 1789 case SOUND_PCM_WRITE_FILTER: 1790 case SOUND_PCM_READ_FILTER: 1791 /* dunno what these do, don't sound important */ 1792 1793 default: 1794 DEB(printf("default ioctl fn 0x%08lx fail\n", cmd)); 1795 ret = EINVAL; 1796 break; 1797 } 1798 1799 relchns(i_dev, rdch, wrch, 0); 1800 1801 PCM_GIANT_LEAVE(d); 1802 1803 return (ret); 1804 } 1805 1806 static int 1807 dsp_poll(struct cdev *i_dev, int events, struct thread *td) 1808 { 1809 struct snddev_info *d; 1810 struct pcm_channel *wrch, *rdch; 1811 int ret, e; 1812 1813 d = dsp_get_info(i_dev); 1814 if (!DSP_REGISTERED(d, i_dev)) 1815 return (EBADF); 1816 1817 PCM_GIANT_ENTER(d); 1818 1819 wrch = NULL; 1820 rdch = NULL; 1821 ret = 0; 1822 1823 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 1824 1825 if (wrch != NULL && !(wrch->flags & CHN_F_DEAD)) { 1826 e = (events & (POLLOUT | POLLWRNORM)); 1827 if (e) 1828 ret |= chn_poll(wrch, e, td); 1829 } 1830 1831 if (rdch != NULL && !(rdch->flags & CHN_F_DEAD)) { 1832 e = (events & (POLLIN | POLLRDNORM)); 1833 if (e) 1834 ret |= chn_poll(rdch, e, td); 1835 } 1836 1837 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 1838 1839 PCM_GIANT_LEAVE(d); 1840 1841 return (ret); 1842 } 1843 1844 static int 1845 dsp_mmap(struct cdev *i_dev, vm_offset_t offset, vm_paddr_t *paddr, int nprot) 1846 { 1847 struct snddev_info *d; 1848 struct pcm_channel *wrch, *rdch, *c; 1849 1850 /* 1851 * Reject PROT_EXEC by default. It just doesn't makes sense. 1852 * Unfortunately, we have to give up this one due to linux_mmap 1853 * changes. 1854 * 1855 * http://lists.freebsd.org/pipermail/freebsd-emulation/2007-June/003698.html 1856 * 1857 */ 1858 if ((nprot & PROT_EXEC) && dsp_mmap_allow_prot_exec == 0) 1859 return (-1); 1860 1861 d = dsp_get_info(i_dev); 1862 if (!DSP_REGISTERED(d, i_dev)) 1863 return (-1); 1864 1865 PCM_GIANT_ENTER(d); 1866 1867 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 1868 1869 /* 1870 * XXX The linux api uses the nprot to select read/write buffer 1871 * our vm system doesn't allow this, so force write buffer. 1872 * 1873 * This is just a quack to fool full-duplex mmap, so that at 1874 * least playback _or_ recording works. If you really got the 1875 * urge to make _both_ work at the same time, avoid O_RDWR. 1876 * Just open each direction separately and mmap() it. 1877 * 1878 * Failure is not an option due to INVARIANTS check within 1879 * device_pager.c, which means, we have to give up one over 1880 * another. 1881 */ 1882 c = (wrch != NULL) ? wrch : rdch; 1883 1884 if (c == NULL || (c->flags & CHN_F_MMAP_INVALID) || 1885 offset >= sndbuf_getsize(c->bufsoft) || 1886 (wrch != NULL && (wrch->flags & CHN_F_MMAP_INVALID)) || 1887 (rdch != NULL && (rdch->flags & CHN_F_MMAP_INVALID))) { 1888 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 1889 PCM_GIANT_EXIT(d); 1890 return (-1); 1891 } 1892 1893 /* XXX full-duplex quack. */ 1894 if (wrch != NULL) 1895 wrch->flags |= CHN_F_MAPPED; 1896 if (rdch != NULL) 1897 rdch->flags |= CHN_F_MAPPED; 1898 1899 *paddr = vtophys(sndbuf_getbufofs(c->bufsoft, offset)); 1900 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 1901 1902 PCM_GIANT_LEAVE(d); 1903 1904 return (0); 1905 } 1906 1907 #ifdef USING_DEVFS 1908 1909 /* So much for dev_stdclone() */ 1910 static int 1911 dsp_stdclone(char *name, char *namep, char *sep, int use_sep, int *u, int *c) 1912 { 1913 size_t len; 1914 1915 len = strlen(namep); 1916 1917 if (bcmp(name, namep, len) != 0) 1918 return (ENODEV); 1919 1920 name += len; 1921 1922 if (isdigit(*name) == 0) 1923 return (ENODEV); 1924 1925 len = strlen(sep); 1926 1927 if (*name == '' && !(name[1] == '\0' || bcmp(name + 1, sep, len) == 0)) 1928 return (ENODEV); 1929 1930 for (*u = 0; isdigit(*name) != 0; name++) { 1931 *u *= 10; 1932 *u += *name - ''; 1933 if (*u > dsp_umax) 1934 return (ENODEV); 1935 } 1936 1937 if (*name == '\0') 1938 return ((use_sep == 0) ? 0 : ENODEV); 1939 1940 if (bcmp(name, sep, len) != 0 || isdigit(name[len]) == 0) 1941 return (ENODEV); 1942 1943 name += len; 1944 1945 if (*name == '' && name[1] != '\0') 1946 return (ENODEV); 1947 1948 for (*c = 0; isdigit(*name) != 0; name++) { 1949 *c *= 10; 1950 *c += *name - ''; 1951 if (*c > dsp_cmax) 1952 return (ENODEV); 1953 } 1954 1955 if (*name != '\0') 1956 return (ENODEV); 1957 1958 return (0); 1959 } 1960 1961 static void 1962 dsp_clone(void *arg, 1963 #if __FreeBSD_version >= 600034 1964 struct ucred *cred, 1965 #endif 1966 char *name, int namelen, struct cdev **dev) 1967 { 1968 struct snddev_info *d; 1969 struct snd_clone_entry *ce; 1970 struct pcm_channel *c; 1971 int i, unit, udcmask, cunit, devtype, devhw, devcmax, tumax; 1972 char *devname, *devsep; 1973 1974 KASSERT(dsp_umax >= 0 && dsp_cmax >= 0, ("Uninitialized unit!")); 1975 1976 if (*dev != NULL) 1977 return; 1978 1979 unit = -1; 1980 cunit = -1; 1981 devtype = -1; 1982 devhw = 0; 1983 devcmax = -1; 1984 tumax = -1; 1985 devname = NULL; 1986 devsep = NULL; 1987 1988 for (i = 0; unit == -1 && 1989 i < (sizeof(dsp_cdevs) / sizeof(dsp_cdevs[0])); i++) { 1990 devtype = dsp_cdevs[i].type; 1991 devname = dsp_cdevs[i].name; 1992 devsep = dsp_cdevs[i].sep; 1993 devhw = dsp_cdevs[i].hw; 1994 devcmax = dsp_cdevs[i].max - 1; 1995 if (strcmp(name, devname) == 0) 1996 unit = snd_unit; 1997 else if (dsp_stdclone(name, devname, devsep, 1998 dsp_cdevs[i].use_sep, &unit, &cunit) != 0) { 1999 unit = -1; 2000 cunit = -1; 2001 } 2002 } 2003 2004 d = devclass_get_softc(pcm_devclass, unit); 2005 if (!PCM_REGISTERED(d) || d->clones == NULL) 2006 return; 2007 2008 /* XXX Need Giant magic entry ??? */ 2009 2010 pcm_lock(d); 2011 if (snd_clone_disabled(d->clones)) { 2012 pcm_unlock(d); 2013 return; 2014 } 2015 2016 PCM_WAIT(d); 2017 PCM_ACQUIRE(d); 2018 pcm_unlock(d); 2019 2020 udcmask = snd_u2unit(unit) | snd_d2unit(devtype); 2021 2022 if (devhw != 0) { 2023 KASSERT(devcmax <= dsp_cmax, 2024 ("overflow: devcmax=%d, dsp_cmax=%d", devcmax, dsp_cmax)); 2025 if (cunit > devcmax) { 2026 PCM_RELEASE_QUICK(d); 2027 return; 2028 } 2029 udcmask |= snd_c2unit(cunit); 2030 CHN_FOREACH(c, d, channels.pcm) { 2031 CHN_LOCK(c); 2032 if (c->unit != udcmask) { 2033 CHN_UNLOCK(c); 2034 continue; 2035 } 2036 CHN_UNLOCK(c); 2037 udcmask &= ~snd_c2unit(cunit); 2038 /* 2039 * Temporarily increase clone maxunit to overcome 2040 * vchan flexibility. 2041 * 2042 * # sysctl dev.pcm.0.play.vchans=256 2043 * dev.pcm.0.play.vchans: 1 -> 256 2044 * # cat /dev/zero > /dev/dsp0.vp255 & 2045 * [1] 17296 2046 * # sysctl dev.pcm.0.play.vchans=0 2047 * dev.pcm.0.play.vchans: 256 -> 1 2048 * # fg 2049 * [1] + running cat /dev/zero > /dev/dsp0.vp255 2050 * ^C 2051 * # cat /dev/zero > /dev/dsp0.vp255 2052 * zsh: operation not supported: /dev/dsp0.vp255 2053 */ 2054 tumax = snd_clone_getmaxunit(d->clones); 2055 if (cunit > tumax) 2056 snd_clone_setmaxunit(d->clones, cunit); 2057 else 2058 tumax = -1; 2059 goto dsp_clone_alloc; 2060 } 2061 /* 2062 * Ok, so we're requesting unallocated vchan, but still 2063 * within maximum vchan limit. 2064 */ 2065 if (((devtype == SND_DEV_DSPHW_VPLAY && d->pvchancount > 0) || 2066 (devtype == SND_DEV_DSPHW_VREC && d->rvchancount > 0)) && 2067 cunit < snd_maxautovchans) { 2068 udcmask &= ~snd_c2unit(cunit); 2069 tumax = snd_clone_getmaxunit(d->clones); 2070 if (cunit > tumax) 2071 snd_clone_setmaxunit(d->clones, cunit); 2072 else 2073 tumax = -1; 2074 goto dsp_clone_alloc; 2075 } 2076 PCM_RELEASE_QUICK(d); 2077 return; 2078 } 2079 2080 dsp_clone_alloc: 2081 ce = snd_clone_alloc(d->clones, dev, &cunit, udcmask); 2082 if (tumax != -1) 2083 snd_clone_setmaxunit(d->clones, tumax); 2084 if (ce != NULL) { 2085 udcmask |= snd_c2unit(cunit); 2086 *dev = make_dev(&dsp_cdevsw, unit2minor(udcmask), 2087 UID_ROOT, GID_WHEEL, 0666, "%s%d%s%d", 2088 devname, unit, devsep, cunit); 2089 snd_clone_register(ce, *dev); 2090 } 2091 2092 PCM_RELEASE_QUICK(d); 2093 2094 if (*dev != NULL) 2095 dev_ref(*dev); 2096 } 2097 2098 static void 2099 dsp_sysinit(void *p) 2100 { 2101 if (dsp_ehtag != NULL) 2102 return; 2103 /* initialize unit numbering */ 2104 snd_unit_init(); 2105 dsp_umax = PCMMAXUNIT; 2106 dsp_cmax = PCMMAXCHAN; 2107 dsp_ehtag = EVENTHANDLER_REGISTER(dev_clone, dsp_clone, 0, 1000); 2108 } 2109 2110 static void 2111 dsp_sysuninit(void *p) 2112 { 2113 if (dsp_ehtag == NULL) 2114 return; 2115 EVENTHANDLER_DEREGISTER(dev_clone, dsp_ehtag); 2116 dsp_ehtag = NULL; 2117 } 2118 2119 SYSINIT(dsp_sysinit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysinit, NULL); 2120 SYSUNINIT(dsp_sysuninit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysuninit, NULL); 2121 #endif 2122 2123 char * 2124 dsp_unit2name(char *buf, size_t len, int unit) 2125 { 2126 int i, dtype; 2127 2128 KASSERT(buf != NULL && len != 0, 2129 ("bogus buf=%p len=%ju", buf, (uintmax_t)len)); 2130 2131 dtype = snd_unit2d(unit); 2132 2133 for (i = 0; i < (sizeof(dsp_cdevs) / sizeof(dsp_cdevs[0])); i++) { 2134 if (dtype != dsp_cdevs[i].type) 2135 continue; 2136 snprintf(buf, len, "%s%d%s%d", dsp_cdevs[i].name, 2137 snd_unit2u(unit), dsp_cdevs[i].sep, snd_unit2c(unit)); 2138 return (buf); 2139 } 2140 2141 return (NULL); 2142 } 2143 2144 /** 2145 * @brief Handler for SNDCTL_AUDIOINFO. 2146 * 2147 * Gathers information about the audio device specified in ai->dev. If 2148 * ai->dev == -1, then this function gathers information about the current 2149 * device. If the call comes in on a non-audio device and ai->dev == -1, 2150 * return EINVAL. 2151 * 2152 * This routine is supposed to go practically straight to the hardware, 2153 * getting capabilities directly from the sound card driver, side-stepping 2154 * the intermediate channel interface. 2155 * 2156 * Note, however, that the usefulness of this command is significantly 2157 * decreased when requesting info about any device other than the one serving 2158 * the request. While each snddev_channel refers to a specific device node, 2159 * the converse is *not* true. Currently, when a sound device node is opened, 2160 * the sound subsystem scans for an available audio channel (or channels, if 2161 * opened in read+write) and then assigns them to the si_drv[12] private 2162 * data fields. As a result, any information returned linking a channel to 2163 * a specific character device isn't necessarily accurate. 2164 * 2165 * @note 2166 * Calling threads must not hold any snddev_info or pcm_channel locks. 2167 * 2168 * @param dev device on which the ioctl was issued 2169 * @param ai ioctl request data container 2170 * 2171 * @retval 0 success 2172 * @retval EINVAL ai->dev specifies an invalid device 2173 * 2174 * @todo Verify correctness of Doxygen tags. ;) 2175 */ 2176 int 2177 dsp_oss_audioinfo(struct cdev *i_dev, oss_audioinfo *ai) 2178 { 2179 struct pcmchan_caps *caps; 2180 struct pcm_channel *ch; 2181 struct snddev_info *d; 2182 uint32_t fmts; 2183 int i, nchan, *rates, minch, maxch; 2184 char *devname, buf[CHN_NAMELEN]; 2185 2186 /* 2187 * If probing the device that received the ioctl, make sure it's a 2188 * DSP device. (Users may use this ioctl with /dev/mixer and 2189 * /dev/midi.) 2190 */ 2191 if (ai->dev == -1 && i_dev->si_devsw != &dsp_cdevsw) 2192 return (EINVAL); 2193 2194 ch = NULL; 2195 devname = NULL; 2196 nchan = 0; 2197 bzero(buf, sizeof(buf)); 2198 2199 /* 2200 * Search for the requested audio device (channel). Start by 2201 * iterating over pcm devices. 2202 */ 2203 for (i = 0; pcm_devclass != NULL && 2204 i < devclass_get_maxunit(pcm_devclass); i++) { 2205 d = devclass_get_softc(pcm_devclass, i); 2206 if (!PCM_REGISTERED(d)) 2207 continue; 2208 2209 /* XXX Need Giant magic entry ??? */ 2210 2211 /* See the note in function docblock */ 2212 mtx_assert(d->lock, MA_NOTOWNED); 2213 pcm_lock(d); 2214 2215 CHN_FOREACH(ch, d, channels.pcm) { 2216 mtx_assert(ch->lock, MA_NOTOWNED); 2217 CHN_LOCK(ch); 2218 if (ai->dev == -1) { 2219 if (DSP_REGISTERED(d, i_dev) && 2220 (ch == PCM_RDCH(i_dev) || /* record ch */ 2221 ch == PCM_WRCH(i_dev))) { /* playback ch */ 2222 devname = dsp_unit2name(buf, 2223 sizeof(buf), ch->unit); 2224 } 2225 } else if (ai->dev == nchan) { 2226 devname = dsp_unit2name(buf, sizeof(buf), 2227 ch->unit); 2228 } 2229 if (devname != NULL) 2230 break; 2231 CHN_UNLOCK(ch); 2232 ++nchan; 2233 } 2234 2235 if (devname != NULL) { 2236 /* 2237 * At this point, the following synchronization stuff 2238 * has happened: 2239 * - a specific PCM device is locked. 2240 * - a specific audio channel has been locked, so be 2241 * sure to unlock when exiting; 2242 */ 2243 2244 caps = chn_getcaps(ch); 2245 2246 /* 2247 * With all handles collected, zero out the user's 2248 * container and begin filling in its fields. 2249 */ 2250 bzero((void *)ai, sizeof(oss_audioinfo)); 2251 2252 ai->dev = nchan; 2253 strlcpy(ai->name, ch->name, sizeof(ai->name)); 2254 2255 if ((ch->flags & CHN_F_BUSY) == 0) 2256 ai->busy = 0; 2257 else 2258 ai->busy = (ch->direction == PCMDIR_PLAY) ? OPEN_WRITE : OPEN_READ; 2259 2260 /** 2261 * @note 2262 * @c cmd - OSSv4 docs: "Only supported under Linux at 2263 * this moment." Cop-out, I know, but I'll save 2264 * running around in the process table for later. 2265 * Is there a risk of leaking information? 2266 */ 2267 ai->pid = ch->pid; 2268 2269 /* 2270 * These flags stolen from SNDCTL_DSP_GETCAPS handler. 2271 * Note, however, that a single channel operates in 2272 * only one direction, so DSP_CAP_DUPLEX is out. 2273 */ 2274 /** 2275 * @todo @c SNDCTL_AUDIOINFO::caps - Make drivers keep 2276 * these in pcmchan::caps? 2277 */ 2278 ai->caps = DSP_CAP_REALTIME | DSP_CAP_MMAP | DSP_CAP_TRIGGER; 2279 2280 /* 2281 * Collect formats supported @b natively by the 2282 * device. Also determine min/max channels. (I.e., 2283 * mono, stereo, or both?) 2284 * 2285 * If any channel is stereo, maxch = 2; 2286 * if all channels are stereo, minch = 2, too; 2287 * if any channel is mono, minch = 1; 2288 * and if all channels are mono, maxch = 1. 2289 */ 2290 minch = 0; 2291 maxch = 0; 2292 fmts = 0; 2293 for (i = 0; caps->fmtlist[i]; i++) { 2294 fmts |= caps->fmtlist[i]; 2295 if (caps->fmtlist[i] & AFMT_STEREO) { 2296 minch = (minch == 0) ? 2 : minch; 2297 maxch = 2; 2298 } else { 2299 minch = 1; 2300 maxch = (maxch == 0) ? 1 : maxch; 2301 } 2302 } 2303 2304 if (ch->direction == PCMDIR_PLAY) 2305 ai->oformats = fmts; 2306 else 2307 ai->iformats = fmts; 2308 2309 /** 2310 * @note 2311 * @c magic - OSSv4 docs: "Reserved for internal use 2312 * by OSS." 2313 * 2314 * @par 2315 * @c card_number - OSSv4 docs: "Number of the sound 2316 * card where this device belongs or -1 if this 2317 * information is not available. Applications 2318 * should normally not use this field for any 2319 * purpose." 2320 */ 2321 ai->card_number = -1; 2322 /** 2323 * @todo @c song_name - depends first on 2324 * SNDCTL_[GS]ETSONG @todo @c label - depends 2325 * on SNDCTL_[GS]ETLABEL 2326 * @todo @c port_number - routing information? 2327 */ 2328 ai->port_number = -1; 2329 ai->mixer_dev = (d->mixer_dev != NULL) ? PCMUNIT(d->mixer_dev) : -1; 2330 /** 2331 * @note 2332 * @c real_device - OSSv4 docs: "Obsolete." 2333 */ 2334 ai->real_device = -1; 2335 strlcpy(ai->devnode, devname, sizeof(ai->devnode)); 2336 ai->enabled = device_is_attached(d->dev) ? 1 : 0; 2337 /** 2338 * @note 2339 * @c flags - OSSv4 docs: "Reserved for future use." 2340 * 2341 * @note 2342 * @c binding - OSSv4 docs: "Reserved for future use." 2343 * 2344 * @todo @c handle - haven't decided how to generate 2345 * this yet; bus, vendor, device IDs? 2346 */ 2347 ai->min_rate = caps->minspeed; 2348 ai->max_rate = caps->maxspeed; 2349 2350 ai->min_channels = minch; 2351 ai->max_channels = maxch; 2352 2353 ai->nrates = chn_getrates(ch, &rates); 2354 if (ai->nrates > OSS_MAX_SAMPLE_RATES) 2355 ai->nrates = OSS_MAX_SAMPLE_RATES; 2356 2357 for (i = 0; i < ai->nrates; i++) 2358 ai->rates[i] = rates[i]; 2359 2360 CHN_UNLOCK(ch); 2361 } 2362 2363 pcm_unlock(d); 2364 2365 if (devname != NULL) 2366 return (0); 2367 } 2368 2369 /* Exhausted the search -- nothing is locked, so return. */ 2370 return (EINVAL); 2371 } 2372 2373 /** 2374 * @brief Assigns a PCM channel to a sync group. 2375 * 2376 * Sync groups are used to enable audio operations on multiple devices 2377 * simultaneously. They may be used with any number of devices and may 2378 * span across applications. Devices are added to groups with 2379 * the SNDCTL_DSP_SYNCGROUP ioctl, and operations are triggered with the 2380 * SNDCTL_DSP_SYNCSTART ioctl. 2381 * 2382 * If the @c id field of the @c group parameter is set to zero, then a new 2383 * sync group is created. Otherwise, wrch and rdch (if set) are added to 2384 * the group specified. 2385 * 2386 * @todo As far as memory allocation, should we assume that things are 2387 * okay and allocate with M_WAITOK before acquiring channel locks, 2388 * freeing later if not? 2389 * 2390 * @param wrch output channel associated w/ device (if any) 2391 * @param rdch input channel associated w/ device (if any) 2392 * @param group Sync group parameters 2393 * 2394 * @retval 0 success 2395 * @retval non-zero error to be propagated upstream 2396 */ 2397 static int 2398 dsp_oss_syncgroup(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_syncgroup *group) 2399 { 2400 struct pcmchan_syncmember *smrd, *smwr; 2401 struct pcmchan_syncgroup *sg; 2402 int ret, sg_ids[3]; 2403 2404 smrd = NULL; 2405 smwr = NULL; 2406 sg = NULL; 2407 ret = 0; 2408 2409 /* 2410 * Free_unr() may sleep, so store released syncgroup IDs until after 2411 * all locks are released. 2412 */ 2413 sg_ids[0] = sg_ids[1] = sg_ids[2] = 0; 2414 2415 PCM_SG_LOCK(); 2416 2417 /* 2418 * - Insert channel(s) into group's member list. 2419 * - Set CHN_F_NOTRIGGER on channel(s). 2420 * - Stop channel(s). 2421 */ 2422 2423 /* 2424 * If device's channels are already mapped to a group, unmap them. 2425 */ 2426 if (wrch) { 2427 CHN_LOCK(wrch); 2428 sg_ids[0] = chn_syncdestroy(wrch); 2429 } 2430 2431 if (rdch) { 2432 CHN_LOCK(rdch); 2433 sg_ids[1] = chn_syncdestroy(rdch); 2434 } 2435 2436 /* 2437 * Verify that mode matches character device properites. 2438 * - Bail if PCM_ENABLE_OUTPUT && wrch == NULL. 2439 * - Bail if PCM_ENABLE_INPUT && rdch == NULL. 2440 */ 2441 if (((wrch == NULL) && (group->mode & PCM_ENABLE_OUTPUT)) || 2442 ((rdch == NULL) && (group->mode & PCM_ENABLE_INPUT))) { 2443 ret = EINVAL; 2444 goto out; 2445 } 2446 2447 /* 2448 * An id of zero indicates the user wants to create a new 2449 * syncgroup. 2450 */ 2451 if (group->id == 0) { 2452 sg = (struct pcmchan_syncgroup *)malloc(sizeof(*sg), M_DEVBUF, M_NOWAIT); 2453 if (sg != NULL) { 2454 SLIST_INIT(&sg->members); 2455 sg->id = alloc_unr(pcmsg_unrhdr); 2456 2457 group->id = sg->id; 2458 SLIST_INSERT_HEAD(&snd_pcm_syncgroups, sg, link); 2459 } else 2460 ret = ENOMEM; 2461 } else { 2462 SLIST_FOREACH(sg, &snd_pcm_syncgroups, link) { 2463 if (sg->id == group->id) 2464 break; 2465 } 2466 if (sg == NULL) 2467 ret = EINVAL; 2468 } 2469 2470 /* Couldn't create or find a syncgroup. Fail. */ 2471 if (sg == NULL) 2472 goto out; 2473 2474 /* 2475 * Allocate a syncmember, assign it and a channel together, and 2476 * insert into syncgroup. 2477 */ 2478 if (group->mode & PCM_ENABLE_INPUT) { 2479 smrd = (struct pcmchan_syncmember *)malloc(sizeof(*smrd), M_DEVBUF, M_NOWAIT); 2480 if (smrd == NULL) { 2481 ret = ENOMEM; 2482 goto out; 2483 } 2484 2485 SLIST_INSERT_HEAD(&sg->members, smrd, link); 2486 smrd->parent = sg; 2487 smrd->ch = rdch; 2488 2489 chn_abort(rdch); 2490 rdch->flags |= CHN_F_NOTRIGGER; 2491 rdch->sm = smrd; 2492 } 2493 2494 if (group->mode & PCM_ENABLE_OUTPUT) { 2495 smwr = (struct pcmchan_syncmember *)malloc(sizeof(*smwr), M_DEVBUF, M_NOWAIT); 2496 if (smwr == NULL) { 2497 ret = ENOMEM; 2498 goto out; 2499 } 2500 2501 SLIST_INSERT_HEAD(&sg->members, smwr, link); 2502 smwr->parent = sg; 2503 smwr->ch = wrch; 2504 2505 chn_abort(wrch); 2506 wrch->flags |= CHN_F_NOTRIGGER; 2507 wrch->sm = smwr; 2508 } 2509 2510 2511 out: 2512 if (ret != 0) { 2513 if (smrd != NULL) 2514 free(smrd, M_DEVBUF); 2515 if ((sg != NULL) && SLIST_EMPTY(&sg->members)) { 2516 sg_ids[2] = sg->id; 2517 SLIST_REMOVE(&snd_pcm_syncgroups, sg, pcmchan_syncgroup, link); 2518 free(sg, M_DEVBUF); 2519 } 2520 2521 if (wrch) 2522 wrch->sm = NULL; 2523 if (rdch) 2524 rdch->sm = NULL; 2525 } 2526 2527 if (wrch) 2528 CHN_UNLOCK(wrch); 2529 if (rdch) 2530 CHN_UNLOCK(rdch); 2531 2532 PCM_SG_UNLOCK(); 2533 2534 if (sg_ids[0]) 2535 free_unr(pcmsg_unrhdr, sg_ids[0]); 2536 if (sg_ids[1]) 2537 free_unr(pcmsg_unrhdr, sg_ids[1]); 2538 if (sg_ids[2]) 2539 free_unr(pcmsg_unrhdr, sg_ids[2]); 2540 2541 return (ret); 2542 } 2543 2544 /** 2545 * @brief Launch a sync group into action 2546 * 2547 * Sync groups are established via SNDCTL_DSP_SYNCGROUP. This function 2548 * iterates over all members, triggering them along the way. 2549 * 2550 * @note Caller must not hold any channel locks. 2551 * 2552 * @param sg_id sync group identifier 2553 * 2554 * @retval 0 success 2555 * @retval non-zero error worthy of propagating upstream to user 2556 */ 2557 static int 2558 dsp_oss_syncstart(int sg_id) 2559 { 2560 struct pcmchan_syncmember *sm, *sm_tmp; 2561 struct pcmchan_syncgroup *sg; 2562 struct pcm_channel *c; 2563 int ret, needlocks; 2564 2565 /* Get the synclists lock */ 2566 PCM_SG_LOCK(); 2567 2568 do { 2569 ret = 0; 2570 needlocks = 0; 2571 2572 /* Search for syncgroup by ID */ 2573 SLIST_FOREACH(sg, &snd_pcm_syncgroups, link) { 2574 if (sg->id == sg_id) 2575 break; 2576 } 2577 2578 /* Return EINVAL if not found */ 2579 if (sg == NULL) { 2580 ret = EINVAL; 2581 break; 2582 } 2583 2584 /* Any removals resulting in an empty group should've handled this */ 2585 KASSERT(!SLIST_EMPTY(&sg->members), ("found empty syncgroup")); 2586 2587 /* 2588 * Attempt to lock all member channels - if any are already 2589 * locked, unlock those acquired, sleep for a bit, and try 2590 * again. 2591 */ 2592 SLIST_FOREACH(sm, &sg->members, link) { 2593 if (CHN_TRYLOCK(sm->ch) == 0) { 2594 int timo = hz * 5/1000; 2595 if (timo < 1) 2596 timo = 1; 2597 2598 /* Release all locked channels so far, retry */ 2599 SLIST_FOREACH(sm_tmp, &sg->members, link) { 2600 /* sm is the member already locked */ 2601 if (sm == sm_tmp) 2602 break; 2603 CHN_UNLOCK(sm_tmp->ch); 2604 } 2605 2606 /** @todo Is PRIBIO correct/ */ 2607 ret = msleep(sm, &snd_pcm_syncgroups_mtx, 2608 PRIBIO | PCATCH, "pcmsg", timo); 2609 if (ret == EINTR || ret == ERESTART) 2610 break; 2611 2612 needlocks = 1; 2613 ret = 0; /* Assumes ret == EAGAIN... */ 2614 } 2615 } 2616 } while (needlocks && ret == 0); 2617 2618 /* Proceed only if no errors encountered. */ 2619 if (ret == 0) { 2620 /* Launch channels */ 2621 while((sm = SLIST_FIRST(&sg->members)) != NULL) { 2622 SLIST_REMOVE_HEAD(&sg->members, link); 2623 2624 c = sm->ch; 2625 c->sm = NULL; 2626 chn_start(c, 1); 2627 c->flags &= ~CHN_F_NOTRIGGER; 2628 CHN_UNLOCK(c); 2629 2630 free(sm, M_DEVBUF); 2631 } 2632 2633 SLIST_REMOVE(&snd_pcm_syncgroups, sg, pcmchan_syncgroup, link); 2634 free(sg, M_DEVBUF); 2635 } 2636 2637 PCM_SG_UNLOCK(); 2638 2639 /* 2640 * Free_unr() may sleep, so be sure to give up the syncgroup lock 2641 * first. 2642 */ 2643 if (ret == 0) 2644 free_unr(pcmsg_unrhdr, sg_id); 2645 2646 return (ret); 2647 } 2648 2649 /** 2650 * @brief Handler for SNDCTL_DSP_POLICY 2651 * 2652 * The SNDCTL_DSP_POLICY ioctl is a simpler interface to control fragment 2653 * size and count like with SNDCTL_DSP_SETFRAGMENT. Instead of the user 2654 * specifying those two parameters, s/he simply selects a number from 0..10 2655 * which corresponds to a buffer size. Smaller numbers request smaller 2656 * buffers with lower latencies (at greater overhead from more frequent 2657 * interrupts), while greater numbers behave in the opposite manner. 2658 * 2659 * The 4Front spec states that a value of 5 should be the default. However, 2660 * this implementation deviates slightly by using a linear scale without 2661 * consulting drivers. I.e., even though drivers may have different default 2662 * buffer sizes, a policy argument of 5 will have the same result across 2663 * all drivers. 2664 * 2665 * See http://manuals.opensound.com/developer/SNDCTL_DSP_POLICY.html for 2666 * more information. 2667 * 2668 * @todo When SNDCTL_DSP_COOKEDMODE is supported, it'll be necessary to 2669 * work with hardware drivers directly. 2670 * 2671 * @note PCM channel arguments must not be locked by caller. 2672 * 2673 * @param wrch Pointer to opened playback channel (optional; may be NULL) 2674 * @param rdch " recording channel (optional; may be NULL) 2675 * @param policy Integer from [0:10] 2676 * 2677 * @retval 0 constant (for now) 2678 */ 2679 static int 2680 dsp_oss_policy(struct pcm_channel *wrch, struct pcm_channel *rdch, int policy) 2681 { 2682 int ret; 2683 2684 if (policy < CHN_POLICY_MIN || policy > CHN_POLICY_MAX) 2685 return (EIO); 2686 2687 /* Default: success */ 2688 ret = 0; 2689 2690 if (rdch) { 2691 CHN_LOCK(rdch); 2692 ret = chn_setlatency(rdch, policy); 2693 CHN_UNLOCK(rdch); 2694 } 2695 2696 if (wrch && ret == 0) { 2697 CHN_LOCK(wrch); 2698 ret = chn_setlatency(wrch, policy); 2699 CHN_UNLOCK(wrch); 2700 } 2701 2702 if (ret) 2703 ret = EIO; 2704 2705 return (ret); 2706 } 2707 2708 #ifdef OSSV4_EXPERIMENT 2709 /** 2710 * @brief Enable or disable "cooked" mode 2711 * 2712 * This is a handler for @c SNDCTL_DSP_COOKEDMODE. When in cooked mode, which 2713 * is the default, the sound system handles rate and format conversions 2714 * automatically (ex: user writing 11025Hz/8 bit/unsigned but card only 2715 * operates with 44100Hz/16bit/signed samples). 2716 * 2717 * Disabling cooked mode is intended for applications wanting to mmap() 2718 * a sound card's buffer space directly, bypassing the FreeBSD 2-stage 2719 * feeder architecture, presumably to gain as much control over audio 2720 * hardware as possible. 2721 * 2722 * See @c http://manuals.opensound.com/developer/SNDCTL_DSP_COOKEDMODE.html 2723 * for more details. 2724 * 2725 * @note Currently, this function is just a stub that always returns EINVAL. 2726 * 2727 * @todo Figure out how to and actually implement this. 2728 * 2729 * @param wrch playback channel (optional; may be NULL) 2730 * @param rdch recording channel (optional; may be NULL) 2731 * @param enabled 0 = raw mode, 1 = cooked mode 2732 * 2733 * @retval EINVAL Operation not yet supported. 2734 */ 2735 static int 2736 dsp_oss_cookedmode(struct pcm_channel *wrch, struct pcm_channel *rdch, int enabled) 2737 { 2738 return (EINVAL); 2739 } 2740 2741 /** 2742 * @brief Retrieve channel interleaving order 2743 * 2744 * This is the handler for @c SNDCTL_DSP_GET_CHNORDER. 2745 * 2746 * See @c http://manuals.opensound.com/developer/SNDCTL_DSP_GET_CHNORDER.html 2747 * for more details. 2748 * 2749 * @note As the ioctl definition is still under construction, FreeBSD 2750 * does not currently support SNDCTL_DSP_GET_CHNORDER. 2751 * 2752 * @param wrch playback channel (optional; may be NULL) 2753 * @param rdch recording channel (optional; may be NULL) 2754 * @param map channel map (result will be stored there) 2755 * 2756 * @retval EINVAL Operation not yet supported. 2757 */ 2758 static int 2759 dsp_oss_getchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map) 2760 { 2761 return (EINVAL); 2762 } 2763 2764 /** 2765 * @brief Specify channel interleaving order 2766 * 2767 * This is the handler for @c SNDCTL_DSP_SET_CHNORDER. 2768 * 2769 * @note As the ioctl definition is still under construction, FreeBSD 2770 * does not currently support @c SNDCTL_DSP_SET_CHNORDER. 2771 * 2772 * @param wrch playback channel (optional; may be NULL) 2773 * @param rdch recording channel (optional; may be NULL) 2774 * @param map channel map 2775 * 2776 * @retval EINVAL Operation not yet supported. 2777 */ 2778 static int 2779 dsp_oss_setchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map) 2780 { 2781 return (EINVAL); 2782 } 2783 2784 /** 2785 * @brief Retrieve an audio device's label 2786 * 2787 * This is a handler for the @c SNDCTL_GETLABEL ioctl. 2788 * 2789 * See @c http://manuals.opensound.com/developer/SNDCTL_GETLABEL.html 2790 * for more details. 2791 * 2792 * From Hannu@4Front: "For example ossxmix (just like some HW mixer 2793 * consoles) can show variable "labels" for certain controls. By default 2794 * the application name (say quake) is shown as the label but 2795 * applications may change the labels themselves." 2796 * 2797 * @note As the ioctl definition is still under construction, FreeBSD 2798 * does not currently support @c SNDCTL_GETLABEL. 2799 * 2800 * @param wrch playback channel (optional; may be NULL) 2801 * @param rdch recording channel (optional; may be NULL) 2802 * @param label label gets copied here 2803 * 2804 * @retval EINVAL Operation not yet supported. 2805 */ 2806 static int 2807 dsp_oss_getlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label) 2808 { 2809 return (EINVAL); 2810 } 2811 2812 /** 2813 * @brief Specify an audio device's label 2814 * 2815 * This is a handler for the @c SNDCTL_SETLABEL ioctl. Please see the 2816 * comments for @c dsp_oss_getlabel immediately above. 2817 * 2818 * See @c http://manuals.opensound.com/developer/SNDCTL_GETLABEL.html 2819 * for more details. 2820 * 2821 * @note As the ioctl definition is still under construction, FreeBSD 2822 * does not currently support SNDCTL_SETLABEL. 2823 * 2824 * @param wrch playback channel (optional; may be NULL) 2825 * @param rdch recording channel (optional; may be NULL) 2826 * @param label label gets copied from here 2827 * 2828 * @retval EINVAL Operation not yet supported. 2829 */ 2830 static int 2831 dsp_oss_setlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label) 2832 { 2833 return (EINVAL); 2834 } 2835 2836 /** 2837 * @brief Retrieve name of currently played song 2838 * 2839 * This is a handler for the @c SNDCTL_GETSONG ioctl. Audio players could 2840 * tell the system the name of the currently playing song, which would be 2841 * visible in @c /dev/sndstat. 2842 * 2843 * See @c http://manuals.opensound.com/developer/SNDCTL_GETSONG.html 2844 * for more details. 2845 * 2846 * @note As the ioctl definition is still under construction, FreeBSD 2847 * does not currently support SNDCTL_GETSONG. 2848 * 2849 * @param wrch playback channel (optional; may be NULL) 2850 * @param rdch recording channel (optional; may be NULL) 2851 * @param song song name gets copied here 2852 * 2853 * @retval EINVAL Operation not yet supported. 2854 */ 2855 static int 2856 dsp_oss_getsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song) 2857 { 2858 return (EINVAL); 2859 } 2860 2861 /** 2862 * @brief Retrieve name of currently played song 2863 * 2864 * This is a handler for the @c SNDCTL_SETSONG ioctl. Audio players could 2865 * tell the system the name of the currently playing song, which would be 2866 * visible in @c /dev/sndstat. 2867 * 2868 * See @c http://manuals.opensound.com/developer/SNDCTL_SETSONG.html 2869 * for more details. 2870 * 2871 * @note As the ioctl definition is still under construction, FreeBSD 2872 * does not currently support SNDCTL_SETSONG. 2873 * 2874 * @param wrch playback channel (optional; may be NULL) 2875 * @param rdch recording channel (optional; may be NULL) 2876 * @param song song name gets copied from here 2877 * 2878 * @retval EINVAL Operation not yet supported. 2879 */ 2880 static int 2881 dsp_oss_setsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song) 2882 { 2883 return (EINVAL); 2884 } 2885 2886 /** 2887 * @brief Rename a device 2888 * 2889 * This is a handler for the @c SNDCTL_SETNAME ioctl. 2890 * 2891 * See @c http://manuals.opensound.com/developer/SNDCTL_SETNAME.html for 2892 * more details. 2893 * 2894 * From Hannu@4Front: "This call is used to change the device name 2895 * reported in /dev/sndstat and ossinfo. So instead of using some generic 2896 * 'OSS loopback audio (MIDI) driver' the device may be given a meaningfull 2897 * name depending on the current context (for example 'OSS virtual wave table 2898 * synth' or 'VoIP link to London')." 2899 * 2900 * @note As the ioctl definition is still under construction, FreeBSD 2901 * does not currently support SNDCTL_SETNAME. 2902 * 2903 * @param wrch playback channel (optional; may be NULL) 2904 * @param rdch recording channel (optional; may be NULL) 2905 * @param name new device name gets copied from here 2906 * 2907 * @retval EINVAL Operation not yet supported. 2908 */ 2909 static int 2910 dsp_oss_setname(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *name) 2911 { 2912 return (EINVAL); 2913 } 2914 #endif /* !OSSV4_EXPERIMENT */
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