1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2005-2009 Ariff Abdullah <ariff@FreeBSD.org> 5 * Portions Copyright (c) Ryan Beasley <ryan.beasley@gmail.com> - GSoC 2006 6 * Copyright (c) 1999 Cameron Grant <cg@FreeBSD.org> 7 * All rights reserved. 8 * Copyright (c) 2024 The FreeBSD Foundation 9 * 10 * Portions of this software were developed by Christos Margiolis 11 * <christos@FreeBSD.org> under sponsorship from the FreeBSD Foundation. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #ifdef HAVE_KERNEL_OPTION_HEADERS 36 #include "opt_snd.h" 37 #endif 38 39 #include <dev/sound/pcm/sound.h> 40 #include <sys/ctype.h> 41 #include <sys/lock.h> 42 #include <sys/rwlock.h> 43 #include <sys/sysent.h> 44 45 #include <vm/vm.h> 46 #include <vm/vm_object.h> 47 #include <vm/vm_page.h> 48 #include <vm/vm_pager.h> 49 50 struct dsp_cdevpriv { 51 struct snddev_info *sc; 52 struct pcm_channel *rdch; 53 struct pcm_channel *wrch; 54 struct pcm_channel *volch; 55 int simplex; 56 }; 57 58 static int dsp_mmap_allow_prot_exec = 0; 59 SYSCTL_INT(_hw_snd, OID_AUTO, compat_linux_mmap, CTLFLAG_RWTUN, 60 &dsp_mmap_allow_prot_exec, 0, 61 "linux mmap compatibility (-1=force disable 0=auto 1=force enable)"); 62 63 static int dsp_basename_clone = 1; 64 SYSCTL_INT(_hw_snd, OID_AUTO, basename_clone, CTLFLAG_RWTUN, 65 &dsp_basename_clone, 0, 66 "DSP basename cloning (0: Disable; 1: Enabled)"); 67 68 #define DSP_REGISTERED(x) (PCM_REGISTERED(x) && (x)->dsp_dev != NULL) 69 70 #define OLDPCM_IOCTL 71 72 static d_open_t dsp_open; 73 static d_read_t dsp_read; 74 static d_write_t dsp_write; 75 static d_ioctl_t dsp_ioctl; 76 static d_poll_t dsp_poll; 77 static d_mmap_t dsp_mmap; 78 static d_mmap_single_t dsp_mmap_single; 79 80 struct cdevsw dsp_cdevsw = { 81 .d_version = D_VERSION, 82 .d_open = dsp_open, 83 .d_read = dsp_read, 84 .d_write = dsp_write, 85 .d_ioctl = dsp_ioctl, 86 .d_poll = dsp_poll, 87 .d_mmap = dsp_mmap, 88 .d_mmap_single = dsp_mmap_single, 89 .d_name = "dsp", 90 }; 91 92 static eventhandler_tag dsp_ehtag = NULL; 93 94 static int dsp_oss_syncgroup(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_syncgroup *group); 95 static int dsp_oss_syncstart(int sg_id); 96 static int dsp_oss_policy(struct pcm_channel *wrch, struct pcm_channel *rdch, int policy); 97 static int dsp_oss_cookedmode(struct pcm_channel *wrch, struct pcm_channel *rdch, int enabled); 98 static int dsp_oss_getchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map); 99 static int dsp_oss_setchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map); 100 static int dsp_oss_getchannelmask(struct pcm_channel *wrch, struct pcm_channel *rdch, int *mask); 101 #ifdef OSSV4_EXPERIMENT 102 static int dsp_oss_getlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label); 103 static int dsp_oss_setlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label); 104 static int dsp_oss_getsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song); 105 static int dsp_oss_setsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song); 106 static int dsp_oss_setname(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *name); 107 #endif 108 109 int 110 dsp_make_dev(device_t dev) 111 { 112 struct make_dev_args devargs; 113 struct snddev_info *sc; 114 int err, unit; 115 116 sc = device_get_softc(dev); 117 unit = device_get_unit(dev); 118 119 make_dev_args_init(&devargs); 120 devargs.mda_devsw = &dsp_cdevsw; 121 devargs.mda_uid = UID_ROOT; 122 devargs.mda_gid = GID_WHEEL; 123 devargs.mda_mode = 0666; 124 devargs.mda_si_drv1 = sc; 125 err = make_dev_s(&devargs, &sc->dsp_dev, "dsp%d", unit); 126 if (err != 0) { 127 device_printf(dev, "failed to create dsp%d: error %d", 128 unit, err); 129 return (ENXIO); 130 } 131 132 return (0); 133 } 134 135 void 136 dsp_destroy_dev(device_t dev) 137 { 138 struct snddev_info *d; 139 140 d = device_get_softc(dev); 141 destroy_dev_sched(d->dsp_dev); 142 } 143 144 static void 145 getchns(struct dsp_cdevpriv *priv, uint32_t prio) 146 { 147 struct snddev_info *d; 148 struct pcm_channel *ch; 149 uint32_t flags; 150 151 if (priv->simplex) { 152 d = priv->sc; 153 if (!PCM_REGISTERED(d)) 154 return; 155 PCM_LOCK(d); 156 PCM_WAIT(d); 157 PCM_ACQUIRE(d); 158 /* 159 * Note: order is important - 160 * pcm flags -> prio query flags -> wild guess 161 */ 162 ch = NULL; 163 flags = pcm_getflags(d->dev); 164 if (flags & SD_F_PRIO_WR) { 165 ch = priv->rdch; 166 } else if (flags & SD_F_PRIO_RD) { 167 ch = priv->wrch; 168 } else if (prio & SD_F_PRIO_WR) { 169 ch = priv->rdch; 170 flags |= SD_F_PRIO_WR; 171 } else if (prio & SD_F_PRIO_RD) { 172 ch = priv->wrch; 173 flags |= SD_F_PRIO_RD; 174 } else if (priv->wrch != NULL) { 175 ch = priv->rdch; 176 flags |= SD_F_PRIO_WR; 177 } else if (priv->rdch != NULL) { 178 ch = priv->wrch; 179 flags |= SD_F_PRIO_RD; 180 } 181 pcm_setflags(d->dev, flags); 182 if (ch != NULL) { 183 CHN_LOCK(ch); 184 chn_ref(ch, -1); 185 chn_release(ch); 186 } 187 PCM_RELEASE(d); 188 PCM_UNLOCK(d); 189 } 190 191 if (priv->rdch != NULL && (prio & SD_F_PRIO_RD)) 192 CHN_LOCK(priv->rdch); 193 if (priv->wrch != NULL && (prio & SD_F_PRIO_WR)) 194 CHN_LOCK(priv->wrch); 195 } 196 197 static void 198 relchns(struct dsp_cdevpriv *priv, uint32_t prio) 199 { 200 if (priv->rdch != NULL && (prio & SD_F_PRIO_RD)) 201 CHN_UNLOCK(priv->rdch); 202 if (priv->wrch != NULL && (prio & SD_F_PRIO_WR)) 203 CHN_UNLOCK(priv->wrch); 204 } 205 206 #define DSP_F_VALID(x) ((x) & (FREAD | FWRITE)) 207 #define DSP_F_DUPLEX(x) (((x) & (FREAD | FWRITE)) == (FREAD | FWRITE)) 208 #define DSP_F_SIMPLEX(x) (!DSP_F_DUPLEX(x)) 209 #define DSP_F_READ(x) ((x) & FREAD) 210 #define DSP_F_WRITE(x) ((x) & FWRITE) 211 212 static const struct { 213 int type; 214 char *name; 215 char *sep; 216 char *alias; 217 } dsp_cdevs[] = { 218 { SND_DEV_DSP, "dsp", ".", NULL }, 219 { SND_DEV_DSPHW_PLAY, "dsp", ".p", NULL }, 220 { SND_DEV_DSPHW_VPLAY, "dsp", ".vp", NULL }, 221 { SND_DEV_DSPHW_REC, "dsp", ".r", NULL }, 222 { SND_DEV_DSPHW_VREC, "dsp", ".vr", NULL }, 223 /* Low priority, OSSv4 aliases. */ 224 { SND_DEV_DSP, "dsp_ac3", ".", "dsp" }, 225 { SND_DEV_DSP, "dsp_mmap", ".", "dsp" }, 226 { SND_DEV_DSP, "dsp_multich", ".", "dsp" }, 227 { SND_DEV_DSP, "dsp_spdifout", ".", "dsp" }, 228 { SND_DEV_DSP, "dsp_spdifin", ".", "dsp" }, 229 }; 230 231 static void 232 dsp_close(void *data) 233 { 234 struct dsp_cdevpriv *priv = data; 235 struct pcm_channel *rdch, *wrch, *volch; 236 struct snddev_info *d; 237 int sg_ids, rdref, wdref; 238 239 if (priv == NULL) 240 return; 241 242 d = priv->sc; 243 /* At this point pcm_unregister() will destroy all channels anyway. */ 244 if (PCM_DETACHING(d)) 245 goto skip; 246 247 PCM_GIANT_ENTER(d); 248 249 PCM_LOCK(d); 250 PCM_WAIT(d); 251 PCM_ACQUIRE(d); 252 253 rdch = priv->rdch; 254 wrch = priv->wrch; 255 volch = priv->volch; 256 257 rdref = -1; 258 wdref = -1; 259 260 if (volch != NULL) { 261 if (volch == rdch) 262 rdref--; 263 else if (volch == wrch) 264 wdref--; 265 else { 266 CHN_LOCK(volch); 267 chn_ref(volch, -1); 268 CHN_UNLOCK(volch); 269 } 270 } 271 272 if (rdch != NULL) 273 CHN_REMOVE(d, rdch, channels.pcm.opened); 274 if (wrch != NULL) 275 CHN_REMOVE(d, wrch, channels.pcm.opened); 276 277 if (rdch != NULL || wrch != NULL) { 278 PCM_UNLOCK(d); 279 if (rdch != NULL) { 280 /* 281 * The channel itself need not be locked because: 282 * a) Adding a channel to a syncgroup happens only 283 * in dsp_ioctl(), which cannot run concurrently 284 * to dsp_close(). 285 * b) The syncmember pointer (sm) is protected by 286 * the global syncgroup list lock. 287 * c) A channel can't just disappear, invalidating 288 * pointers, unless it's closed/dereferenced 289 * first. 290 */ 291 PCM_SG_LOCK(); 292 sg_ids = chn_syncdestroy(rdch); 293 PCM_SG_UNLOCK(); 294 if (sg_ids != 0) 295 free_unr(pcmsg_unrhdr, sg_ids); 296 297 CHN_LOCK(rdch); 298 chn_ref(rdch, rdref); 299 chn_abort(rdch); /* won't sleep */ 300 rdch->flags &= ~(CHN_F_RUNNING | CHN_F_MMAP | 301 CHN_F_DEAD | CHN_F_EXCLUSIVE); 302 chn_reset(rdch, 0, 0); 303 chn_release(rdch); 304 } 305 if (wrch != NULL) { 306 /* 307 * Please see block above. 308 */ 309 PCM_SG_LOCK(); 310 sg_ids = chn_syncdestroy(wrch); 311 PCM_SG_UNLOCK(); 312 if (sg_ids != 0) 313 free_unr(pcmsg_unrhdr, sg_ids); 314 315 CHN_LOCK(wrch); 316 chn_ref(wrch, wdref); 317 chn_flush(wrch); /* may sleep */ 318 wrch->flags &= ~(CHN_F_RUNNING | CHN_F_MMAP | 319 CHN_F_DEAD | CHN_F_EXCLUSIVE); 320 chn_reset(wrch, 0, 0); 321 chn_release(wrch); 322 } 323 PCM_LOCK(d); 324 } 325 326 PCM_RELEASE(d); 327 PCM_UNLOCK(d); 328 329 PCM_GIANT_LEAVE(d); 330 skip: 331 free(priv, M_DEVBUF); 332 priv = NULL; 333 } 334 335 #define DSP_FIXUP_ERROR() do { \ 336 prio = pcm_getflags(d->dev); \ 337 if (!DSP_F_VALID(flags)) \ 338 error = EINVAL; \ 339 if (!DSP_F_DUPLEX(flags) && \ 340 ((DSP_F_READ(flags) && d->reccount == 0) || \ 341 (DSP_F_WRITE(flags) && d->playcount == 0))) \ 342 error = ENOTSUP; \ 343 else if (!DSP_F_DUPLEX(flags) && (prio & SD_F_SIMPLEX) && \ 344 ((DSP_F_READ(flags) && (prio & SD_F_PRIO_WR)) || \ 345 (DSP_F_WRITE(flags) && (prio & SD_F_PRIO_RD)))) \ 346 error = EBUSY; \ 347 } while (0) 348 349 static int 350 dsp_open(struct cdev *i_dev, int flags, int mode, struct thread *td) 351 { 352 struct dsp_cdevpriv *priv; 353 struct pcm_channel *rdch, *wrch; 354 struct snddev_info *d; 355 uint32_t fmt, spd, prio; 356 int error, rderror, wrerror; 357 358 /* Kind of impossible.. */ 359 if (i_dev == NULL || td == NULL) 360 return (ENODEV); 361 362 d = i_dev->si_drv1; 363 if (PCM_DETACHING(d) || !PCM_REGISTERED(d)) 364 return (EBADF); 365 366 priv = malloc(sizeof(*priv), M_DEVBUF, M_WAITOK | M_ZERO); 367 priv->sc = d; 368 priv->rdch = NULL; 369 priv->wrch = NULL; 370 priv->volch = NULL; 371 priv->simplex = (pcm_getflags(d->dev) & SD_F_SIMPLEX) ? 1 : 0; 372 373 error = devfs_set_cdevpriv(priv, dsp_close); 374 if (error != 0) 375 return (error); 376 377 PCM_GIANT_ENTER(d); 378 379 /* Lock snddev so nobody else can monkey with it. */ 380 PCM_LOCK(d); 381 PCM_WAIT(d); 382 383 error = 0; 384 DSP_FIXUP_ERROR(); 385 if (error != 0) { 386 PCM_UNLOCK(d); 387 PCM_GIANT_EXIT(d); 388 return (error); 389 } 390 391 /* 392 * That is just enough. Acquire and unlock pcm lock so 393 * the other will just have to wait until we finish doing 394 * everything. 395 */ 396 PCM_ACQUIRE(d); 397 PCM_UNLOCK(d); 398 399 fmt = SND_FORMAT(AFMT_U8, 1, 0); 400 spd = DSP_DEFAULT_SPEED; 401 402 rdch = NULL; 403 wrch = NULL; 404 rderror = 0; 405 wrerror = 0; 406 407 if (DSP_F_READ(flags)) { 408 /* open for read */ 409 rderror = pcm_chnalloc(d, &rdch, PCMDIR_REC, 410 td->td_proc->p_pid, td->td_proc->p_comm); 411 412 if (rderror == 0 && chn_reset(rdch, fmt, spd) != 0) 413 rderror = ENXIO; 414 415 if (rderror != 0) { 416 if (rdch != NULL) 417 chn_release(rdch); 418 if (!DSP_F_DUPLEX(flags)) { 419 PCM_RELEASE_QUICK(d); 420 PCM_GIANT_EXIT(d); 421 return (rderror); 422 } 423 rdch = NULL; 424 } else { 425 if (flags & O_NONBLOCK) 426 rdch->flags |= CHN_F_NBIO; 427 if (flags & O_EXCL) 428 rdch->flags |= CHN_F_EXCLUSIVE; 429 chn_ref(rdch, 1); 430 chn_vpc_reset(rdch, SND_VOL_C_PCM, 0); 431 CHN_UNLOCK(rdch); 432 } 433 } 434 435 if (DSP_F_WRITE(flags)) { 436 /* open for write */ 437 wrerror = pcm_chnalloc(d, &wrch, PCMDIR_PLAY, 438 td->td_proc->p_pid, td->td_proc->p_comm); 439 440 if (wrerror == 0 && chn_reset(wrch, fmt, spd) != 0) 441 wrerror = ENXIO; 442 443 if (wrerror != 0) { 444 if (wrch != NULL) 445 chn_release(wrch); 446 if (!DSP_F_DUPLEX(flags)) { 447 if (rdch != NULL) { 448 /* 449 * Lock, deref and release previously 450 * created record channel 451 */ 452 CHN_LOCK(rdch); 453 chn_ref(rdch, -1); 454 chn_release(rdch); 455 } 456 PCM_RELEASE_QUICK(d); 457 PCM_GIANT_EXIT(d); 458 return (wrerror); 459 } 460 wrch = NULL; 461 } else { 462 if (flags & O_NONBLOCK) 463 wrch->flags |= CHN_F_NBIO; 464 if (flags & O_EXCL) 465 wrch->flags |= CHN_F_EXCLUSIVE; 466 chn_ref(wrch, 1); 467 chn_vpc_reset(wrch, SND_VOL_C_PCM, 0); 468 CHN_UNLOCK(wrch); 469 } 470 } 471 472 PCM_LOCK(d); 473 474 if (wrch == NULL && rdch == NULL) { 475 PCM_RELEASE(d); 476 PCM_UNLOCK(d); 477 PCM_GIANT_EXIT(d); 478 if (wrerror != 0) 479 return (wrerror); 480 if (rderror != 0) 481 return (rderror); 482 return (EINVAL); 483 } 484 if (rdch != NULL) 485 CHN_INSERT_HEAD(d, rdch, channels.pcm.opened); 486 if (wrch != NULL) 487 CHN_INSERT_HEAD(d, wrch, channels.pcm.opened); 488 priv->rdch = rdch; 489 priv->wrch = wrch; 490 491 PCM_RELEASE(d); 492 PCM_UNLOCK(d); 493 494 PCM_GIANT_LEAVE(d); 495 496 return (0); 497 } 498 499 static __inline int 500 dsp_io_ops(struct dsp_cdevpriv *priv, struct uio *buf) 501 { 502 struct snddev_info *d; 503 struct pcm_channel **ch; 504 int (*chn_io)(struct pcm_channel *, struct uio *); 505 int prio, ret; 506 pid_t runpid; 507 508 KASSERT(buf != NULL && 509 (buf->uio_rw == UIO_READ || buf->uio_rw == UIO_WRITE), 510 ("%s(): io train wreck!", __func__)); 511 512 d = priv->sc; 513 if (PCM_DETACHING(d) || !DSP_REGISTERED(d)) 514 return (EBADF); 515 516 PCM_GIANT_ENTER(d); 517 518 switch (buf->uio_rw) { 519 case UIO_READ: 520 prio = SD_F_PRIO_RD; 521 ch = &priv->rdch; 522 chn_io = chn_read; 523 break; 524 case UIO_WRITE: 525 prio = SD_F_PRIO_WR; 526 ch = &priv->wrch; 527 chn_io = chn_write; 528 break; 529 default: 530 panic("invalid/corrupted uio direction: %d", buf->uio_rw); 531 break; 532 } 533 534 runpid = buf->uio_td->td_proc->p_pid; 535 536 getchns(priv, prio); 537 538 if (*ch == NULL || !((*ch)->flags & CHN_F_BUSY)) { 539 if (priv->rdch != NULL || priv->wrch != NULL) 540 relchns(priv, prio); 541 PCM_GIANT_EXIT(d); 542 return (EBADF); 543 } 544 545 if (((*ch)->flags & (CHN_F_MMAP | CHN_F_DEAD)) || 546 (((*ch)->flags & CHN_F_RUNNING) && (*ch)->pid != runpid)) { 547 relchns(priv, prio); 548 PCM_GIANT_EXIT(d); 549 return (EINVAL); 550 } else if (!((*ch)->flags & CHN_F_RUNNING)) { 551 (*ch)->flags |= CHN_F_RUNNING; 552 (*ch)->pid = runpid; 553 } 554 555 /* 556 * chn_read/write must give up channel lock in order to copy bytes 557 * from/to userland, so up the "in progress" counter to make sure 558 * someone else doesn't come along and muss up the buffer. 559 */ 560 ++(*ch)->inprog; 561 ret = chn_io(*ch, buf); 562 --(*ch)->inprog; 563 564 CHN_BROADCAST(&(*ch)->cv); 565 566 relchns(priv, prio); 567 568 PCM_GIANT_LEAVE(d); 569 570 return (ret); 571 } 572 573 static int 574 dsp_read(struct cdev *i_dev, struct uio *buf, int flag) 575 { 576 struct dsp_cdevpriv *priv; 577 int err; 578 579 if ((err = devfs_get_cdevpriv((void **)&priv)) != 0) 580 return (err); 581 return (dsp_io_ops(priv, buf)); 582 } 583 584 static int 585 dsp_write(struct cdev *i_dev, struct uio *buf, int flag) 586 { 587 struct dsp_cdevpriv *priv; 588 int err; 589 590 if ((err = devfs_get_cdevpriv((void **)&priv)) != 0) 591 return (err); 592 return (dsp_io_ops(priv, buf)); 593 } 594 595 static int 596 dsp_ioctl_channel(struct dsp_cdevpriv *priv, struct pcm_channel *volch, 597 u_long cmd, caddr_t arg) 598 { 599 struct snddev_info *d; 600 struct pcm_channel *rdch, *wrch; 601 int j, left, right, center, mute; 602 603 d = priv->sc; 604 if (!PCM_REGISTERED(d) || !(pcm_getflags(d->dev) & SD_F_VPC)) 605 return (-1); 606 607 PCM_UNLOCKASSERT(d); 608 609 j = cmd & 0xff; 610 611 rdch = priv->rdch; 612 wrch = priv->wrch; 613 614 /* No specific channel, look into cache */ 615 if (volch == NULL) 616 volch = priv->volch; 617 618 /* Look harder */ 619 if (volch == NULL) { 620 if (j == SOUND_MIXER_RECLEV && rdch != NULL) 621 volch = rdch; 622 else if (j == SOUND_MIXER_PCM && wrch != NULL) 623 volch = wrch; 624 } 625 626 /* Final validation */ 627 if (volch == NULL) 628 return (EINVAL); 629 630 CHN_LOCK(volch); 631 if (!(volch->feederflags & (1 << FEEDER_VOLUME))) { 632 CHN_UNLOCK(volch); 633 return (EINVAL); 634 } 635 636 switch (cmd & ~0xff) { 637 case MIXER_WRITE(0): 638 switch (j) { 639 case SOUND_MIXER_MUTE: 640 if (volch->direction == PCMDIR_REC) { 641 chn_setmute_multi(volch, SND_VOL_C_PCM, (*(int *)arg & SOUND_MASK_RECLEV) != 0); 642 } else { 643 chn_setmute_multi(volch, SND_VOL_C_PCM, (*(int *)arg & SOUND_MASK_PCM) != 0); 644 } 645 break; 646 case SOUND_MIXER_PCM: 647 if (volch->direction != PCMDIR_PLAY) 648 break; 649 left = *(int *)arg & 0x7f; 650 right = ((*(int *)arg) >> 8) & 0x7f; 651 center = (left + right) >> 1; 652 chn_setvolume_multi(volch, SND_VOL_C_PCM, 653 left, right, center); 654 break; 655 case SOUND_MIXER_RECLEV: 656 if (volch->direction != PCMDIR_REC) 657 break; 658 left = *(int *)arg & 0x7f; 659 right = ((*(int *)arg) >> 8) & 0x7f; 660 center = (left + right) >> 1; 661 chn_setvolume_multi(volch, SND_VOL_C_PCM, 662 left, right, center); 663 break; 664 default: 665 /* ignore all other mixer writes */ 666 break; 667 } 668 break; 669 670 case MIXER_READ(0): 671 switch (j) { 672 case SOUND_MIXER_MUTE: 673 mute = CHN_GETMUTE(volch, SND_VOL_C_PCM, SND_CHN_T_FL) || 674 CHN_GETMUTE(volch, SND_VOL_C_PCM, SND_CHN_T_FR); 675 if (volch->direction == PCMDIR_REC) { 676 *(int *)arg = mute << SOUND_MIXER_RECLEV; 677 } else { 678 *(int *)arg = mute << SOUND_MIXER_PCM; 679 } 680 break; 681 case SOUND_MIXER_PCM: 682 if (volch->direction != PCMDIR_PLAY) 683 break; 684 *(int *)arg = CHN_GETVOLUME(volch, 685 SND_VOL_C_PCM, SND_CHN_T_FL); 686 *(int *)arg |= CHN_GETVOLUME(volch, 687 SND_VOL_C_PCM, SND_CHN_T_FR) << 8; 688 break; 689 case SOUND_MIXER_RECLEV: 690 if (volch->direction != PCMDIR_REC) 691 break; 692 *(int *)arg = CHN_GETVOLUME(volch, 693 SND_VOL_C_PCM, SND_CHN_T_FL); 694 *(int *)arg |= CHN_GETVOLUME(volch, 695 SND_VOL_C_PCM, SND_CHN_T_FR) << 8; 696 break; 697 case SOUND_MIXER_DEVMASK: 698 case SOUND_MIXER_CAPS: 699 case SOUND_MIXER_STEREODEVS: 700 if (volch->direction == PCMDIR_REC) 701 *(int *)arg = SOUND_MASK_RECLEV; 702 else 703 *(int *)arg = SOUND_MASK_PCM; 704 break; 705 default: 706 *(int *)arg = 0; 707 break; 708 } 709 break; 710 711 default: 712 break; 713 } 714 CHN_UNLOCK(volch); 715 return (0); 716 } 717 718 static int 719 dsp_ioctl(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode, 720 struct thread *td) 721 { 722 struct dsp_cdevpriv *priv; 723 struct pcm_channel *chn, *rdch, *wrch; 724 struct snddev_info *d; 725 u_long xcmd; 726 int *arg_i, ret, tmp, err; 727 728 if ((err = devfs_get_cdevpriv((void **)&priv)) != 0) 729 return (err); 730 731 d = priv->sc; 732 if (PCM_DETACHING(d) || !DSP_REGISTERED(d)) 733 return (EBADF); 734 735 PCM_GIANT_ENTER(d); 736 737 arg_i = (int *)arg; 738 ret = 0; 739 xcmd = 0; 740 chn = NULL; 741 742 if (IOCGROUP(cmd) == 'M') { 743 if (cmd == OSS_GETVERSION) { 744 *arg_i = SOUND_VERSION; 745 PCM_GIANT_EXIT(d); 746 return (0); 747 } 748 ret = dsp_ioctl_channel(priv, priv->volch, cmd, arg); 749 if (ret != -1) { 750 PCM_GIANT_EXIT(d); 751 return (ret); 752 } 753 754 if (d->mixer_dev != NULL) { 755 PCM_ACQUIRE_QUICK(d); 756 ret = mixer_ioctl_cmd(d->mixer_dev, cmd, arg, -1, td, 757 MIXER_CMD_DIRECT); 758 PCM_RELEASE_QUICK(d); 759 } else 760 ret = EBADF; 761 762 PCM_GIANT_EXIT(d); 763 764 return (ret); 765 } 766 767 /* 768 * Certain ioctls may be made on any type of device (audio, mixer, 769 * and MIDI). Handle those special cases here. 770 */ 771 if (IOCGROUP(cmd) == 'X') { 772 PCM_ACQUIRE_QUICK(d); 773 switch(cmd) { 774 case SNDCTL_SYSINFO: 775 sound_oss_sysinfo((oss_sysinfo *)arg); 776 break; 777 case SNDCTL_CARDINFO: 778 ret = sound_oss_card_info((oss_card_info *)arg); 779 break; 780 case SNDCTL_AUDIOINFO: 781 case SNDCTL_AUDIOINFO_EX: 782 case SNDCTL_ENGINEINFO: 783 ret = dsp_oss_audioinfo(i_dev, (oss_audioinfo *)arg); 784 break; 785 case SNDCTL_MIXERINFO: 786 ret = mixer_oss_mixerinfo(i_dev, (oss_mixerinfo *)arg); 787 break; 788 default: 789 ret = EINVAL; 790 } 791 PCM_RELEASE_QUICK(d); 792 PCM_GIANT_EXIT(d); 793 return (ret); 794 } 795 796 getchns(priv, 0); 797 rdch = priv->rdch; 798 wrch = priv->wrch; 799 800 if (wrch != NULL && (wrch->flags & CHN_F_DEAD)) 801 wrch = NULL; 802 if (rdch != NULL && (rdch->flags & CHN_F_DEAD)) 803 rdch = NULL; 804 805 if (wrch == NULL && rdch == NULL) { 806 PCM_GIANT_EXIT(d); 807 return (EINVAL); 808 } 809 810 switch(cmd) { 811 #ifdef OLDPCM_IOCTL 812 /* 813 * we start with the new ioctl interface. 814 */ 815 case AIONWRITE: /* how many bytes can write ? */ 816 if (wrch) { 817 CHN_LOCK(wrch); 818 /* 819 if (wrch && wrch->bufhard.dl) 820 while (chn_wrfeed(wrch) == 0); 821 */ 822 *arg_i = sndbuf_getfree(wrch->bufsoft); 823 CHN_UNLOCK(wrch); 824 } else { 825 *arg_i = 0; 826 ret = EINVAL; 827 } 828 break; 829 830 case AIOSSIZE: /* set the current blocksize */ 831 { 832 struct snd_size *p = (struct snd_size *)arg; 833 834 p->play_size = 0; 835 p->rec_size = 0; 836 PCM_ACQUIRE_QUICK(d); 837 if (wrch) { 838 CHN_LOCK(wrch); 839 chn_setblocksize(wrch, 2, p->play_size); 840 p->play_size = sndbuf_getblksz(wrch->bufsoft); 841 CHN_UNLOCK(wrch); 842 } 843 if (rdch) { 844 CHN_LOCK(rdch); 845 chn_setblocksize(rdch, 2, p->rec_size); 846 p->rec_size = sndbuf_getblksz(rdch->bufsoft); 847 CHN_UNLOCK(rdch); 848 } 849 PCM_RELEASE_QUICK(d); 850 } 851 break; 852 case AIOGSIZE: /* get the current blocksize */ 853 { 854 struct snd_size *p = (struct snd_size *)arg; 855 856 if (wrch) { 857 CHN_LOCK(wrch); 858 p->play_size = sndbuf_getblksz(wrch->bufsoft); 859 CHN_UNLOCK(wrch); 860 } 861 if (rdch) { 862 CHN_LOCK(rdch); 863 p->rec_size = sndbuf_getblksz(rdch->bufsoft); 864 CHN_UNLOCK(rdch); 865 } 866 } 867 break; 868 869 case AIOSFMT: 870 case AIOGFMT: 871 { 872 snd_chan_param *p = (snd_chan_param *)arg; 873 874 if (cmd == AIOSFMT && 875 ((p->play_format != 0 && p->play_rate == 0) || 876 (p->rec_format != 0 && p->rec_rate == 0))) { 877 ret = EINVAL; 878 break; 879 } 880 PCM_ACQUIRE_QUICK(d); 881 if (wrch) { 882 CHN_LOCK(wrch); 883 if (cmd == AIOSFMT && p->play_format != 0) { 884 chn_setformat(wrch, 885 SND_FORMAT(p->play_format, 886 AFMT_CHANNEL(wrch->format), 887 AFMT_EXTCHANNEL(wrch->format))); 888 chn_setspeed(wrch, p->play_rate); 889 } 890 p->play_rate = wrch->speed; 891 p->play_format = AFMT_ENCODING(wrch->format); 892 CHN_UNLOCK(wrch); 893 } else { 894 p->play_rate = 0; 895 p->play_format = 0; 896 } 897 if (rdch) { 898 CHN_LOCK(rdch); 899 if (cmd == AIOSFMT && p->rec_format != 0) { 900 chn_setformat(rdch, 901 SND_FORMAT(p->rec_format, 902 AFMT_CHANNEL(rdch->format), 903 AFMT_EXTCHANNEL(rdch->format))); 904 chn_setspeed(rdch, p->rec_rate); 905 } 906 p->rec_rate = rdch->speed; 907 p->rec_format = AFMT_ENCODING(rdch->format); 908 CHN_UNLOCK(rdch); 909 } else { 910 p->rec_rate = 0; 911 p->rec_format = 0; 912 } 913 PCM_RELEASE_QUICK(d); 914 } 915 break; 916 917 case AIOGCAP: /* get capabilities */ 918 { 919 snd_capabilities *p = (snd_capabilities *)arg; 920 struct pcmchan_caps *pcaps = NULL, *rcaps = NULL; 921 struct cdev *pdev; 922 923 PCM_LOCK(d); 924 if (rdch) { 925 CHN_LOCK(rdch); 926 rcaps = chn_getcaps(rdch); 927 } 928 if (wrch) { 929 CHN_LOCK(wrch); 930 pcaps = chn_getcaps(wrch); 931 } 932 p->rate_min = max(rcaps? rcaps->minspeed : 0, 933 pcaps? pcaps->minspeed : 0); 934 p->rate_max = min(rcaps? rcaps->maxspeed : 1000000, 935 pcaps? pcaps->maxspeed : 1000000); 936 p->bufsize = min(rdch? sndbuf_getsize(rdch->bufsoft) : 1000000, 937 wrch? sndbuf_getsize(wrch->bufsoft) : 1000000); 938 /* XXX bad on sb16 */ 939 p->formats = (rdch? chn_getformats(rdch) : 0xffffffff) & 940 (wrch? chn_getformats(wrch) : 0xffffffff); 941 if (rdch && wrch) { 942 p->formats |= 943 (pcm_getflags(d->dev) & SD_F_SIMPLEX) ? 0 : 944 AFMT_FULLDUPLEX; 945 } 946 pdev = d->mixer_dev; 947 p->mixers = 1; /* default: one mixer */ 948 p->inputs = pdev->si_drv1? mix_getdevs(pdev->si_drv1) : 0; 949 p->left = p->right = 100; 950 if (wrch) 951 CHN_UNLOCK(wrch); 952 if (rdch) 953 CHN_UNLOCK(rdch); 954 PCM_UNLOCK(d); 955 } 956 break; 957 958 case AIOSTOP: 959 if (*arg_i == AIOSYNC_PLAY && wrch) { 960 CHN_LOCK(wrch); 961 *arg_i = chn_abort(wrch); 962 CHN_UNLOCK(wrch); 963 } else if (*arg_i == AIOSYNC_CAPTURE && rdch) { 964 CHN_LOCK(rdch); 965 *arg_i = chn_abort(rdch); 966 CHN_UNLOCK(rdch); 967 } else { 968 printf("AIOSTOP: bad channel 0x%x\n", *arg_i); 969 *arg_i = 0; 970 } 971 break; 972 973 case AIOSYNC: 974 printf("AIOSYNC chan 0x%03lx pos %lu unimplemented\n", 975 ((snd_sync_parm *)arg)->chan, ((snd_sync_parm *)arg)->pos); 976 break; 977 #endif 978 /* 979 * here follow the standard ioctls (filio.h etc.) 980 */ 981 case FIONREAD: /* get # bytes to read */ 982 if (rdch) { 983 CHN_LOCK(rdch); 984 /* if (rdch && rdch->bufhard.dl) 985 while (chn_rdfeed(rdch) == 0); 986 */ 987 *arg_i = sndbuf_getready(rdch->bufsoft); 988 CHN_UNLOCK(rdch); 989 } else { 990 *arg_i = 0; 991 ret = EINVAL; 992 } 993 break; 994 995 case FIOASYNC: /*set/clear async i/o */ 996 DEB( printf("FIOASYNC\n") ; ) 997 break; 998 999 case SNDCTL_DSP_NONBLOCK: /* set non-blocking i/o */ 1000 case FIONBIO: /* set/clear non-blocking i/o */ 1001 if (rdch) { 1002 CHN_LOCK(rdch); 1003 if (cmd == SNDCTL_DSP_NONBLOCK || *arg_i) 1004 rdch->flags |= CHN_F_NBIO; 1005 else 1006 rdch->flags &= ~CHN_F_NBIO; 1007 CHN_UNLOCK(rdch); 1008 } 1009 if (wrch) { 1010 CHN_LOCK(wrch); 1011 if (cmd == SNDCTL_DSP_NONBLOCK || *arg_i) 1012 wrch->flags |= CHN_F_NBIO; 1013 else 1014 wrch->flags &= ~CHN_F_NBIO; 1015 CHN_UNLOCK(wrch); 1016 } 1017 break; 1018 1019 /* 1020 * Finally, here is the linux-compatible ioctl interface 1021 */ 1022 #define THE_REAL_SNDCTL_DSP_GETBLKSIZE _IOWR('P', 4, int) 1023 case THE_REAL_SNDCTL_DSP_GETBLKSIZE: 1024 case SNDCTL_DSP_GETBLKSIZE: 1025 chn = wrch ? wrch : rdch; 1026 if (chn) { 1027 CHN_LOCK(chn); 1028 *arg_i = sndbuf_getblksz(chn->bufsoft); 1029 CHN_UNLOCK(chn); 1030 } else { 1031 *arg_i = 0; 1032 ret = EINVAL; 1033 } 1034 break; 1035 1036 case SNDCTL_DSP_SETBLKSIZE: 1037 RANGE(*arg_i, 16, 65536); 1038 PCM_ACQUIRE_QUICK(d); 1039 if (wrch) { 1040 CHN_LOCK(wrch); 1041 chn_setblocksize(wrch, 2, *arg_i); 1042 CHN_UNLOCK(wrch); 1043 } 1044 if (rdch) { 1045 CHN_LOCK(rdch); 1046 chn_setblocksize(rdch, 2, *arg_i); 1047 CHN_UNLOCK(rdch); 1048 } 1049 PCM_RELEASE_QUICK(d); 1050 break; 1051 1052 case SNDCTL_DSP_RESET: 1053 DEB(printf("dsp reset\n")); 1054 if (wrch) { 1055 CHN_LOCK(wrch); 1056 chn_abort(wrch); 1057 chn_resetbuf(wrch); 1058 CHN_UNLOCK(wrch); 1059 } 1060 if (rdch) { 1061 CHN_LOCK(rdch); 1062 chn_abort(rdch); 1063 chn_resetbuf(rdch); 1064 CHN_UNLOCK(rdch); 1065 } 1066 break; 1067 1068 case SNDCTL_DSP_SYNC: 1069 DEB(printf("dsp sync\n")); 1070 /* chn_sync may sleep */ 1071 if (wrch) { 1072 CHN_LOCK(wrch); 1073 chn_sync(wrch, 0); 1074 CHN_UNLOCK(wrch); 1075 } 1076 break; 1077 1078 case SNDCTL_DSP_SPEED: 1079 /* chn_setspeed may sleep */ 1080 tmp = 0; 1081 PCM_ACQUIRE_QUICK(d); 1082 if (wrch) { 1083 CHN_LOCK(wrch); 1084 ret = chn_setspeed(wrch, *arg_i); 1085 tmp = wrch->speed; 1086 CHN_UNLOCK(wrch); 1087 } 1088 if (rdch && ret == 0) { 1089 CHN_LOCK(rdch); 1090 ret = chn_setspeed(rdch, *arg_i); 1091 if (tmp == 0) 1092 tmp = rdch->speed; 1093 CHN_UNLOCK(rdch); 1094 } 1095 PCM_RELEASE_QUICK(d); 1096 *arg_i = tmp; 1097 break; 1098 1099 case SOUND_PCM_READ_RATE: 1100 chn = wrch ? wrch : rdch; 1101 if (chn) { 1102 CHN_LOCK(chn); 1103 *arg_i = chn->speed; 1104 CHN_UNLOCK(chn); 1105 } else { 1106 *arg_i = 0; 1107 ret = EINVAL; 1108 } 1109 break; 1110 1111 case SNDCTL_DSP_STEREO: 1112 tmp = -1; 1113 *arg_i = (*arg_i)? 2 : 1; 1114 PCM_ACQUIRE_QUICK(d); 1115 if (wrch) { 1116 CHN_LOCK(wrch); 1117 ret = chn_setformat(wrch, 1118 SND_FORMAT(wrch->format, *arg_i, 0)); 1119 tmp = (AFMT_CHANNEL(wrch->format) > 1)? 1 : 0; 1120 CHN_UNLOCK(wrch); 1121 } 1122 if (rdch && ret == 0) { 1123 CHN_LOCK(rdch); 1124 ret = chn_setformat(rdch, 1125 SND_FORMAT(rdch->format, *arg_i, 0)); 1126 if (tmp == -1) 1127 tmp = (AFMT_CHANNEL(rdch->format) > 1)? 1 : 0; 1128 CHN_UNLOCK(rdch); 1129 } 1130 PCM_RELEASE_QUICK(d); 1131 *arg_i = tmp; 1132 break; 1133 1134 case SOUND_PCM_WRITE_CHANNELS: 1135 /* case SNDCTL_DSP_CHANNELS: ( == SOUND_PCM_WRITE_CHANNELS) */ 1136 if (*arg_i < 0 || *arg_i > AFMT_CHANNEL_MAX) { 1137 *arg_i = 0; 1138 ret = EINVAL; 1139 break; 1140 } 1141 if (*arg_i != 0) { 1142 uint32_t ext = 0; 1143 1144 tmp = 0; 1145 /* 1146 * Map channel number to surround sound formats. 1147 * Devices that need bitperfect mode to operate 1148 * (e.g. more than SND_CHN_MAX channels) are not 1149 * subject to any mapping. 1150 */ 1151 if (!(pcm_getflags(d->dev) & SD_F_BITPERFECT)) { 1152 struct pcmchan_matrix *m; 1153 1154 if (*arg_i > SND_CHN_MAX) 1155 *arg_i = SND_CHN_MAX; 1156 1157 m = feeder_matrix_default_channel_map(*arg_i); 1158 if (m != NULL) 1159 ext = m->ext; 1160 } 1161 1162 PCM_ACQUIRE_QUICK(d); 1163 if (wrch) { 1164 CHN_LOCK(wrch); 1165 ret = chn_setformat(wrch, 1166 SND_FORMAT(wrch->format, *arg_i, ext)); 1167 tmp = AFMT_CHANNEL(wrch->format); 1168 CHN_UNLOCK(wrch); 1169 } 1170 if (rdch && ret == 0) { 1171 CHN_LOCK(rdch); 1172 ret = chn_setformat(rdch, 1173 SND_FORMAT(rdch->format, *arg_i, ext)); 1174 if (tmp == 0) 1175 tmp = AFMT_CHANNEL(rdch->format); 1176 CHN_UNLOCK(rdch); 1177 } 1178 PCM_RELEASE_QUICK(d); 1179 *arg_i = tmp; 1180 } else { 1181 chn = wrch ? wrch : rdch; 1182 CHN_LOCK(chn); 1183 *arg_i = AFMT_CHANNEL(chn->format); 1184 CHN_UNLOCK(chn); 1185 } 1186 break; 1187 1188 case SOUND_PCM_READ_CHANNELS: 1189 chn = wrch ? wrch : rdch; 1190 if (chn) { 1191 CHN_LOCK(chn); 1192 *arg_i = AFMT_CHANNEL(chn->format); 1193 CHN_UNLOCK(chn); 1194 } else { 1195 *arg_i = 0; 1196 ret = EINVAL; 1197 } 1198 break; 1199 1200 case SNDCTL_DSP_GETFMTS: /* returns a mask of supported fmts */ 1201 chn = wrch ? wrch : rdch; 1202 if (chn) { 1203 CHN_LOCK(chn); 1204 *arg_i = chn_getformats(chn); 1205 CHN_UNLOCK(chn); 1206 } else { 1207 *arg_i = 0; 1208 ret = EINVAL; 1209 } 1210 break; 1211 1212 case SNDCTL_DSP_SETFMT: /* sets _one_ format */ 1213 if (*arg_i != AFMT_QUERY) { 1214 tmp = 0; 1215 PCM_ACQUIRE_QUICK(d); 1216 if (wrch) { 1217 CHN_LOCK(wrch); 1218 ret = chn_setformat(wrch, SND_FORMAT(*arg_i, 1219 AFMT_CHANNEL(wrch->format), 1220 AFMT_EXTCHANNEL(wrch->format))); 1221 tmp = wrch->format; 1222 CHN_UNLOCK(wrch); 1223 } 1224 if (rdch && ret == 0) { 1225 CHN_LOCK(rdch); 1226 ret = chn_setformat(rdch, SND_FORMAT(*arg_i, 1227 AFMT_CHANNEL(rdch->format), 1228 AFMT_EXTCHANNEL(rdch->format))); 1229 if (tmp == 0) 1230 tmp = rdch->format; 1231 CHN_UNLOCK(rdch); 1232 } 1233 PCM_RELEASE_QUICK(d); 1234 *arg_i = AFMT_ENCODING(tmp); 1235 } else { 1236 chn = wrch ? wrch : rdch; 1237 CHN_LOCK(chn); 1238 *arg_i = AFMT_ENCODING(chn->format); 1239 CHN_UNLOCK(chn); 1240 } 1241 break; 1242 1243 case SNDCTL_DSP_SETFRAGMENT: 1244 DEB(printf("SNDCTL_DSP_SETFRAGMENT 0x%08x\n", *(int *)arg)); 1245 { 1246 uint32_t fragln = (*arg_i) & 0x0000ffff; 1247 uint32_t maxfrags = ((*arg_i) & 0xffff0000) >> 16; 1248 uint32_t fragsz; 1249 uint32_t r_maxfrags, r_fragsz; 1250 1251 RANGE(fragln, 4, 16); 1252 fragsz = 1 << fragln; 1253 1254 if (maxfrags == 0) 1255 maxfrags = CHN_2NDBUFMAXSIZE / fragsz; 1256 if (maxfrags < 2) 1257 maxfrags = 2; 1258 if (maxfrags * fragsz > CHN_2NDBUFMAXSIZE) 1259 maxfrags = CHN_2NDBUFMAXSIZE / fragsz; 1260 1261 DEB(printf("SNDCTL_DSP_SETFRAGMENT %d frags, %d sz\n", maxfrags, fragsz)); 1262 PCM_ACQUIRE_QUICK(d); 1263 if (rdch) { 1264 CHN_LOCK(rdch); 1265 ret = chn_setblocksize(rdch, maxfrags, fragsz); 1266 r_maxfrags = sndbuf_getblkcnt(rdch->bufsoft); 1267 r_fragsz = sndbuf_getblksz(rdch->bufsoft); 1268 CHN_UNLOCK(rdch); 1269 } else { 1270 r_maxfrags = maxfrags; 1271 r_fragsz = fragsz; 1272 } 1273 if (wrch && ret == 0) { 1274 CHN_LOCK(wrch); 1275 ret = chn_setblocksize(wrch, maxfrags, fragsz); 1276 maxfrags = sndbuf_getblkcnt(wrch->bufsoft); 1277 fragsz = sndbuf_getblksz(wrch->bufsoft); 1278 CHN_UNLOCK(wrch); 1279 } else { /* use whatever came from the read channel */ 1280 maxfrags = r_maxfrags; 1281 fragsz = r_fragsz; 1282 } 1283 PCM_RELEASE_QUICK(d); 1284 1285 fragln = 0; 1286 while (fragsz > 1) { 1287 fragln++; 1288 fragsz >>= 1; 1289 } 1290 *arg_i = (maxfrags << 16) | fragln; 1291 } 1292 break; 1293 1294 case SNDCTL_DSP_GETISPACE: 1295 /* return the size of data available in the input queue */ 1296 { 1297 audio_buf_info *a = (audio_buf_info *)arg; 1298 if (rdch) { 1299 struct snd_dbuf *bs = rdch->bufsoft; 1300 1301 CHN_LOCK(rdch); 1302 a->bytes = sndbuf_getready(bs); 1303 a->fragments = a->bytes / sndbuf_getblksz(bs); 1304 a->fragstotal = sndbuf_getblkcnt(bs); 1305 a->fragsize = sndbuf_getblksz(bs); 1306 CHN_UNLOCK(rdch); 1307 } else 1308 ret = EINVAL; 1309 } 1310 break; 1311 1312 case SNDCTL_DSP_GETOSPACE: 1313 /* return space available in the output queue */ 1314 { 1315 audio_buf_info *a = (audio_buf_info *)arg; 1316 if (wrch) { 1317 struct snd_dbuf *bs = wrch->bufsoft; 1318 1319 CHN_LOCK(wrch); 1320 /* XXX abusive DMA update: chn_wrupdate(wrch); */ 1321 a->bytes = sndbuf_getfree(bs); 1322 a->fragments = a->bytes / sndbuf_getblksz(bs); 1323 a->fragstotal = sndbuf_getblkcnt(bs); 1324 a->fragsize = sndbuf_getblksz(bs); 1325 CHN_UNLOCK(wrch); 1326 } else 1327 ret = EINVAL; 1328 } 1329 break; 1330 1331 case SNDCTL_DSP_GETIPTR: 1332 { 1333 count_info *a = (count_info *)arg; 1334 if (rdch) { 1335 struct snd_dbuf *bs = rdch->bufsoft; 1336 1337 CHN_LOCK(rdch); 1338 /* XXX abusive DMA update: chn_rdupdate(rdch); */ 1339 a->bytes = sndbuf_gettotal(bs); 1340 a->blocks = sndbuf_getblocks(bs) - rdch->blocks; 1341 a->ptr = sndbuf_getfreeptr(bs); 1342 rdch->blocks = sndbuf_getblocks(bs); 1343 CHN_UNLOCK(rdch); 1344 } else 1345 ret = EINVAL; 1346 } 1347 break; 1348 1349 case SNDCTL_DSP_GETOPTR: 1350 { 1351 count_info *a = (count_info *)arg; 1352 if (wrch) { 1353 struct snd_dbuf *bs = wrch->bufsoft; 1354 1355 CHN_LOCK(wrch); 1356 /* XXX abusive DMA update: chn_wrupdate(wrch); */ 1357 a->bytes = sndbuf_gettotal(bs); 1358 a->blocks = sndbuf_getblocks(bs) - wrch->blocks; 1359 a->ptr = sndbuf_getreadyptr(bs); 1360 wrch->blocks = sndbuf_getblocks(bs); 1361 CHN_UNLOCK(wrch); 1362 } else 1363 ret = EINVAL; 1364 } 1365 break; 1366 1367 case SNDCTL_DSP_GETCAPS: 1368 PCM_LOCK(d); 1369 *arg_i = PCM_CAP_REALTIME | PCM_CAP_MMAP | PCM_CAP_TRIGGER; 1370 if (rdch && wrch && !(pcm_getflags(d->dev) & SD_F_SIMPLEX)) 1371 *arg_i |= PCM_CAP_DUPLEX; 1372 if (rdch && (rdch->flags & CHN_F_VIRTUAL) != 0) 1373 *arg_i |= PCM_CAP_VIRTUAL; 1374 if (wrch && (wrch->flags & CHN_F_VIRTUAL) != 0) 1375 *arg_i |= PCM_CAP_VIRTUAL; 1376 PCM_UNLOCK(d); 1377 break; 1378 1379 case SOUND_PCM_READ_BITS: 1380 chn = wrch ? wrch : rdch; 1381 if (chn) { 1382 CHN_LOCK(chn); 1383 if (chn->format & AFMT_8BIT) 1384 *arg_i = 8; 1385 else if (chn->format & AFMT_16BIT) 1386 *arg_i = 16; 1387 else if (chn->format & AFMT_24BIT) 1388 *arg_i = 24; 1389 else if (chn->format & AFMT_32BIT) 1390 *arg_i = 32; 1391 else 1392 ret = EINVAL; 1393 CHN_UNLOCK(chn); 1394 } else { 1395 *arg_i = 0; 1396 ret = EINVAL; 1397 } 1398 break; 1399 1400 case SNDCTL_DSP_SETTRIGGER: 1401 if (rdch) { 1402 CHN_LOCK(rdch); 1403 rdch->flags &= ~CHN_F_NOTRIGGER; 1404 if (*arg_i & PCM_ENABLE_INPUT) 1405 chn_start(rdch, 1); 1406 else { 1407 chn_abort(rdch); 1408 chn_resetbuf(rdch); 1409 rdch->flags |= CHN_F_NOTRIGGER; 1410 } 1411 CHN_UNLOCK(rdch); 1412 } 1413 if (wrch) { 1414 CHN_LOCK(wrch); 1415 wrch->flags &= ~CHN_F_NOTRIGGER; 1416 if (*arg_i & PCM_ENABLE_OUTPUT) 1417 chn_start(wrch, 1); 1418 else { 1419 chn_abort(wrch); 1420 chn_resetbuf(wrch); 1421 wrch->flags |= CHN_F_NOTRIGGER; 1422 } 1423 CHN_UNLOCK(wrch); 1424 } 1425 break; 1426 1427 case SNDCTL_DSP_GETTRIGGER: 1428 *arg_i = 0; 1429 if (wrch) { 1430 CHN_LOCK(wrch); 1431 if (wrch->flags & CHN_F_TRIGGERED) 1432 *arg_i |= PCM_ENABLE_OUTPUT; 1433 CHN_UNLOCK(wrch); 1434 } 1435 if (rdch) { 1436 CHN_LOCK(rdch); 1437 if (rdch->flags & CHN_F_TRIGGERED) 1438 *arg_i |= PCM_ENABLE_INPUT; 1439 CHN_UNLOCK(rdch); 1440 } 1441 break; 1442 1443 case SNDCTL_DSP_GETODELAY: 1444 if (wrch) { 1445 struct snd_dbuf *bs = wrch->bufsoft; 1446 1447 CHN_LOCK(wrch); 1448 /* XXX abusive DMA update: chn_wrupdate(wrch); */ 1449 *arg_i = sndbuf_getready(bs); 1450 CHN_UNLOCK(wrch); 1451 } else 1452 ret = EINVAL; 1453 break; 1454 1455 case SNDCTL_DSP_POST: 1456 if (wrch) { 1457 CHN_LOCK(wrch); 1458 wrch->flags &= ~CHN_F_NOTRIGGER; 1459 chn_start(wrch, 1); 1460 CHN_UNLOCK(wrch); 1461 } 1462 break; 1463 1464 case SNDCTL_DSP_SETDUPLEX: 1465 /* 1466 * switch to full-duplex mode if card is in half-duplex 1467 * mode and is able to work in full-duplex mode 1468 */ 1469 PCM_LOCK(d); 1470 if (rdch && wrch && (pcm_getflags(d->dev) & SD_F_SIMPLEX)) 1471 pcm_setflags(d->dev, pcm_getflags(d->dev)^SD_F_SIMPLEX); 1472 PCM_UNLOCK(d); 1473 break; 1474 1475 /* 1476 * The following four ioctls are simple wrappers around mixer_ioctl 1477 * with no further processing. xcmd is short for "translated 1478 * command". 1479 */ 1480 case SNDCTL_DSP_GETRECVOL: 1481 if (xcmd == 0) { 1482 xcmd = SOUND_MIXER_READ_RECLEV; 1483 chn = rdch; 1484 } 1485 /* FALLTHROUGH */ 1486 case SNDCTL_DSP_SETRECVOL: 1487 if (xcmd == 0) { 1488 xcmd = SOUND_MIXER_WRITE_RECLEV; 1489 chn = rdch; 1490 } 1491 /* FALLTHROUGH */ 1492 case SNDCTL_DSP_GETPLAYVOL: 1493 if (xcmd == 0) { 1494 xcmd = SOUND_MIXER_READ_PCM; 1495 chn = wrch; 1496 } 1497 /* FALLTHROUGH */ 1498 case SNDCTL_DSP_SETPLAYVOL: 1499 if (xcmd == 0) { 1500 xcmd = SOUND_MIXER_WRITE_PCM; 1501 chn = wrch; 1502 } 1503 1504 ret = dsp_ioctl_channel(priv, chn, xcmd, arg); 1505 if (ret != -1) { 1506 PCM_GIANT_EXIT(d); 1507 return (ret); 1508 } 1509 1510 if (d->mixer_dev != NULL) { 1511 PCM_ACQUIRE_QUICK(d); 1512 ret = mixer_ioctl_cmd(d->mixer_dev, xcmd, arg, -1, td, 1513 MIXER_CMD_DIRECT); 1514 PCM_RELEASE_QUICK(d); 1515 } else 1516 ret = ENOTSUP; 1517 1518 break; 1519 1520 case SNDCTL_DSP_GET_RECSRC_NAMES: 1521 case SNDCTL_DSP_GET_RECSRC: 1522 case SNDCTL_DSP_SET_RECSRC: 1523 if (d->mixer_dev != NULL) { 1524 PCM_ACQUIRE_QUICK(d); 1525 ret = mixer_ioctl_cmd(d->mixer_dev, cmd, arg, -1, td, 1526 MIXER_CMD_DIRECT); 1527 PCM_RELEASE_QUICK(d); 1528 } else 1529 ret = ENOTSUP; 1530 break; 1531 1532 /* 1533 * The following 3 ioctls aren't very useful at the moment. For 1534 * now, only a single channel is associated with a cdev (/dev/dspN 1535 * instance), so there's only a single output routing to use (i.e., 1536 * the wrch bound to this cdev). 1537 */ 1538 case SNDCTL_DSP_GET_PLAYTGT_NAMES: 1539 { 1540 oss_mixer_enuminfo *ei; 1541 ei = (oss_mixer_enuminfo *)arg; 1542 ei->dev = 0; 1543 ei->ctrl = 0; 1544 ei->version = 0; /* static for now */ 1545 ei->strindex[0] = 0; 1546 1547 if (wrch != NULL) { 1548 ei->nvalues = 1; 1549 strlcpy(ei->strings, wrch->name, 1550 sizeof(ei->strings)); 1551 } else { 1552 ei->nvalues = 0; 1553 ei->strings[0] = '\0'; 1554 } 1555 } 1556 break; 1557 case SNDCTL_DSP_GET_PLAYTGT: 1558 case SNDCTL_DSP_SET_PLAYTGT: /* yes, they are the same for now */ 1559 /* 1560 * Re: SET_PLAYTGT 1561 * OSSv4: "The value that was accepted by the device will 1562 * be returned back in the variable pointed by the 1563 * argument." 1564 */ 1565 if (wrch != NULL) 1566 *arg_i = 0; 1567 else 1568 ret = EINVAL; 1569 break; 1570 1571 case SNDCTL_DSP_SILENCE: 1572 /* 1573 * Flush the software (pre-feed) buffer, but try to minimize playback 1574 * interruption. (I.e., record unplayed samples with intent to 1575 * restore by SNDCTL_DSP_SKIP.) Intended for application "pause" 1576 * functionality. 1577 */ 1578 if (wrch == NULL) 1579 ret = EINVAL; 1580 else { 1581 struct snd_dbuf *bs; 1582 CHN_LOCK(wrch); 1583 while (wrch->inprog != 0) 1584 cv_wait(&wrch->cv, wrch->lock); 1585 bs = wrch->bufsoft; 1586 if ((bs->shadbuf != NULL) && (sndbuf_getready(bs) > 0)) { 1587 bs->sl = sndbuf_getready(bs); 1588 sndbuf_dispose(bs, bs->shadbuf, sndbuf_getready(bs)); 1589 sndbuf_fillsilence(bs); 1590 chn_start(wrch, 0); 1591 } 1592 CHN_UNLOCK(wrch); 1593 } 1594 break; 1595 1596 case SNDCTL_DSP_SKIP: 1597 /* 1598 * OSSv4 docs: "This ioctl call discards all unplayed samples in the 1599 * playback buffer by moving the current write position immediately 1600 * before the point where the device is currently reading the samples." 1601 */ 1602 if (wrch == NULL) 1603 ret = EINVAL; 1604 else { 1605 struct snd_dbuf *bs; 1606 CHN_LOCK(wrch); 1607 while (wrch->inprog != 0) 1608 cv_wait(&wrch->cv, wrch->lock); 1609 bs = wrch->bufsoft; 1610 if ((bs->shadbuf != NULL) && (bs->sl > 0)) { 1611 sndbuf_softreset(bs); 1612 sndbuf_acquire(bs, bs->shadbuf, bs->sl); 1613 bs->sl = 0; 1614 chn_start(wrch, 0); 1615 } 1616 CHN_UNLOCK(wrch); 1617 } 1618 break; 1619 1620 case SNDCTL_DSP_CURRENT_OPTR: 1621 case SNDCTL_DSP_CURRENT_IPTR: 1622 /** 1623 * @note Changing formats resets the buffer counters, which differs 1624 * from the 4Front drivers. However, I don't expect this to be 1625 * much of a problem. 1626 * 1627 * @note In a test where @c CURRENT_OPTR is called immediately after write 1628 * returns, this driver is about 32K samples behind whereas 1629 * 4Front's is about 8K samples behind. Should determine source 1630 * of discrepancy, even if only out of curiosity. 1631 * 1632 * @todo Actually test SNDCTL_DSP_CURRENT_IPTR. 1633 */ 1634 chn = (cmd == SNDCTL_DSP_CURRENT_OPTR) ? wrch : rdch; 1635 if (chn == NULL) 1636 ret = EINVAL; 1637 else { 1638 struct snd_dbuf *bs; 1639 /* int tmp; */ 1640 1641 oss_count_t *oc = (oss_count_t *)arg; 1642 1643 CHN_LOCK(chn); 1644 bs = chn->bufsoft; 1645 #if 0 1646 tmp = (sndbuf_getsize(b) + chn_getptr(chn) - sndbuf_gethwptr(b)) % sndbuf_getsize(b); 1647 oc->samples = (sndbuf_gettotal(b) + tmp) / sndbuf_getalign(b); 1648 oc->fifo_samples = (sndbuf_getready(b) - tmp) / sndbuf_getalign(b); 1649 #else 1650 oc->samples = sndbuf_gettotal(bs) / sndbuf_getalign(bs); 1651 oc->fifo_samples = sndbuf_getready(bs) / sndbuf_getalign(bs); 1652 #endif 1653 CHN_UNLOCK(chn); 1654 } 1655 break; 1656 1657 case SNDCTL_DSP_HALT_OUTPUT: 1658 case SNDCTL_DSP_HALT_INPUT: 1659 chn = (cmd == SNDCTL_DSP_HALT_OUTPUT) ? wrch : rdch; 1660 if (chn == NULL) 1661 ret = EINVAL; 1662 else { 1663 CHN_LOCK(chn); 1664 chn_abort(chn); 1665 CHN_UNLOCK(chn); 1666 } 1667 break; 1668 1669 case SNDCTL_DSP_LOW_WATER: 1670 /* 1671 * Set the number of bytes required to attract attention by 1672 * select/poll. 1673 */ 1674 if (wrch != NULL) { 1675 CHN_LOCK(wrch); 1676 wrch->lw = (*arg_i > 1) ? *arg_i : 1; 1677 CHN_UNLOCK(wrch); 1678 } 1679 if (rdch != NULL) { 1680 CHN_LOCK(rdch); 1681 rdch->lw = (*arg_i > 1) ? *arg_i : 1; 1682 CHN_UNLOCK(rdch); 1683 } 1684 break; 1685 1686 case SNDCTL_DSP_GETERROR: 1687 /* 1688 * OSSv4 docs: "All errors and counters will automatically be 1689 * cleared to zeroes after the call so each call will return only 1690 * the errors that occurred after the previous invocation. ... The 1691 * play_underruns and rec_overrun fields are the only useful fields 1692 * returned by OSS 4.0." 1693 */ 1694 { 1695 audio_errinfo *ei = (audio_errinfo *)arg; 1696 1697 bzero((void *)ei, sizeof(*ei)); 1698 1699 if (wrch != NULL) { 1700 CHN_LOCK(wrch); 1701 ei->play_underruns = wrch->xruns; 1702 wrch->xruns = 0; 1703 CHN_UNLOCK(wrch); 1704 } 1705 if (rdch != NULL) { 1706 CHN_LOCK(rdch); 1707 ei->rec_overruns = rdch->xruns; 1708 rdch->xruns = 0; 1709 CHN_UNLOCK(rdch); 1710 } 1711 } 1712 break; 1713 1714 case SNDCTL_DSP_SYNCGROUP: 1715 PCM_ACQUIRE_QUICK(d); 1716 ret = dsp_oss_syncgroup(wrch, rdch, (oss_syncgroup *)arg); 1717 PCM_RELEASE_QUICK(d); 1718 break; 1719 1720 case SNDCTL_DSP_SYNCSTART: 1721 PCM_ACQUIRE_QUICK(d); 1722 ret = dsp_oss_syncstart(*arg_i); 1723 PCM_RELEASE_QUICK(d); 1724 break; 1725 1726 case SNDCTL_DSP_POLICY: 1727 PCM_ACQUIRE_QUICK(d); 1728 ret = dsp_oss_policy(wrch, rdch, *arg_i); 1729 PCM_RELEASE_QUICK(d); 1730 break; 1731 1732 case SNDCTL_DSP_COOKEDMODE: 1733 PCM_ACQUIRE_QUICK(d); 1734 if (!(pcm_getflags(d->dev) & SD_F_BITPERFECT)) 1735 ret = dsp_oss_cookedmode(wrch, rdch, *arg_i); 1736 PCM_RELEASE_QUICK(d); 1737 break; 1738 case SNDCTL_DSP_GET_CHNORDER: 1739 PCM_ACQUIRE_QUICK(d); 1740 ret = dsp_oss_getchnorder(wrch, rdch, (unsigned long long *)arg); 1741 PCM_RELEASE_QUICK(d); 1742 break; 1743 case SNDCTL_DSP_SET_CHNORDER: 1744 PCM_ACQUIRE_QUICK(d); 1745 ret = dsp_oss_setchnorder(wrch, rdch, (unsigned long long *)arg); 1746 PCM_RELEASE_QUICK(d); 1747 break; 1748 case SNDCTL_DSP_GETCHANNELMASK: /* XXX vlc */ 1749 PCM_ACQUIRE_QUICK(d); 1750 ret = dsp_oss_getchannelmask(wrch, rdch, (int *)arg); 1751 PCM_RELEASE_QUICK(d); 1752 break; 1753 case SNDCTL_DSP_BIND_CHANNEL: /* XXX what?!? */ 1754 ret = EINVAL; 1755 break; 1756 #ifdef OSSV4_EXPERIMENT 1757 /* 1758 * XXX The following ioctls are not yet supported and just return 1759 * EINVAL. 1760 */ 1761 case SNDCTL_DSP_GETOPEAKS: 1762 case SNDCTL_DSP_GETIPEAKS: 1763 chn = (cmd == SNDCTL_DSP_GETOPEAKS) ? wrch : rdch; 1764 if (chn == NULL) 1765 ret = EINVAL; 1766 else { 1767 oss_peaks_t *op = (oss_peaks_t *)arg; 1768 int lpeak, rpeak; 1769 1770 CHN_LOCK(chn); 1771 ret = chn_getpeaks(chn, &lpeak, &rpeak); 1772 if (ret == -1) 1773 ret = EINVAL; 1774 else { 1775 (*op)[0] = lpeak; 1776 (*op)[1] = rpeak; 1777 } 1778 CHN_UNLOCK(chn); 1779 } 1780 break; 1781 1782 /* 1783 * XXX Once implemented, revisit this for proper cv protection 1784 * (if necessary). 1785 */ 1786 case SNDCTL_GETLABEL: 1787 ret = dsp_oss_getlabel(wrch, rdch, (oss_label_t *)arg); 1788 break; 1789 case SNDCTL_SETLABEL: 1790 ret = dsp_oss_setlabel(wrch, rdch, (oss_label_t *)arg); 1791 break; 1792 case SNDCTL_GETSONG: 1793 ret = dsp_oss_getsong(wrch, rdch, (oss_longname_t *)arg); 1794 break; 1795 case SNDCTL_SETSONG: 1796 ret = dsp_oss_setsong(wrch, rdch, (oss_longname_t *)arg); 1797 break; 1798 case SNDCTL_SETNAME: 1799 ret = dsp_oss_setname(wrch, rdch, (oss_longname_t *)arg); 1800 break; 1801 #if 0 1802 /** 1803 * @note The S/PDIF interface ioctls, @c SNDCTL_DSP_READCTL and 1804 * @c SNDCTL_DSP_WRITECTL have been omitted at the suggestion of 1805 * 4Front Technologies. 1806 */ 1807 case SNDCTL_DSP_READCTL: 1808 case SNDCTL_DSP_WRITECTL: 1809 ret = EINVAL; 1810 break; 1811 #endif /* !0 (explicitly omitted ioctls) */ 1812 1813 #endif /* !OSSV4_EXPERIMENT */ 1814 case SNDCTL_DSP_MAPINBUF: 1815 case SNDCTL_DSP_MAPOUTBUF: 1816 case SNDCTL_DSP_SETSYNCRO: 1817 /* undocumented */ 1818 1819 case SNDCTL_DSP_SUBDIVIDE: 1820 case SOUND_PCM_WRITE_FILTER: 1821 case SOUND_PCM_READ_FILTER: 1822 /* dunno what these do, don't sound important */ 1823 1824 default: 1825 DEB(printf("default ioctl fn 0x%08lx fail\n", cmd)); 1826 ret = EINVAL; 1827 break; 1828 } 1829 1830 PCM_GIANT_LEAVE(d); 1831 1832 return (ret); 1833 } 1834 1835 static int 1836 dsp_poll(struct cdev *i_dev, int events, struct thread *td) 1837 { 1838 struct dsp_cdevpriv *priv; 1839 struct snddev_info *d; 1840 struct pcm_channel *wrch, *rdch; 1841 int ret, e, err; 1842 1843 if ((err = devfs_get_cdevpriv((void **)&priv)) != 0) 1844 return (err); 1845 d = priv->sc; 1846 if (PCM_DETACHING(d) || !DSP_REGISTERED(d)) { 1847 /* XXX many clients don't understand POLLNVAL */ 1848 return (events & (POLLHUP | POLLPRI | POLLIN | 1849 POLLRDNORM | POLLOUT | POLLWRNORM)); 1850 } 1851 PCM_GIANT_ENTER(d); 1852 1853 ret = 0; 1854 1855 getchns(priv, SD_F_PRIO_RD | SD_F_PRIO_WR); 1856 wrch = priv->wrch; 1857 rdch = priv->rdch; 1858 1859 if (wrch != NULL && !(wrch->flags & CHN_F_DEAD)) { 1860 e = (events & (POLLOUT | POLLWRNORM)); 1861 if (e) 1862 ret |= chn_poll(wrch, e, td); 1863 } 1864 1865 if (rdch != NULL && !(rdch->flags & CHN_F_DEAD)) { 1866 e = (events & (POLLIN | POLLRDNORM)); 1867 if (e) 1868 ret |= chn_poll(rdch, e, td); 1869 } 1870 1871 relchns(priv, SD_F_PRIO_RD | SD_F_PRIO_WR); 1872 1873 PCM_GIANT_LEAVE(d); 1874 1875 return (ret); 1876 } 1877 1878 static int 1879 dsp_mmap(struct cdev *i_dev, vm_ooffset_t offset, vm_paddr_t *paddr, 1880 int nprot, vm_memattr_t *memattr) 1881 { 1882 1883 /* 1884 * offset is in range due to checks in dsp_mmap_single(). 1885 * XXX memattr is not honored. 1886 */ 1887 *paddr = vtophys(offset); 1888 return (0); 1889 } 1890 1891 static int 1892 dsp_mmap_single(struct cdev *i_dev, vm_ooffset_t *offset, 1893 vm_size_t size, struct vm_object **object, int nprot) 1894 { 1895 struct dsp_cdevpriv *priv; 1896 struct snddev_info *d; 1897 struct pcm_channel *wrch, *rdch, *c; 1898 int err; 1899 1900 /* 1901 * Reject PROT_EXEC by default. It just doesn't makes sense. 1902 * Unfortunately, we have to give up this one due to linux_mmap 1903 * changes. 1904 * 1905 * https://lists.freebsd.org/pipermail/freebsd-emulation/2007-June/003698.html 1906 * 1907 */ 1908 #ifdef SV_ABI_LINUX 1909 if ((nprot & PROT_EXEC) && (dsp_mmap_allow_prot_exec < 0 || 1910 (dsp_mmap_allow_prot_exec == 0 && 1911 SV_CURPROC_ABI() != SV_ABI_LINUX))) 1912 #else 1913 if ((nprot & PROT_EXEC) && dsp_mmap_allow_prot_exec < 1) 1914 #endif 1915 return (EINVAL); 1916 1917 /* 1918 * PROT_READ (alone) selects the input buffer. 1919 * PROT_WRITE (alone) selects the output buffer. 1920 * PROT_WRITE|PROT_READ together select the output buffer. 1921 */ 1922 if ((nprot & (PROT_READ | PROT_WRITE)) == 0) 1923 return (EINVAL); 1924 1925 if ((err = devfs_get_cdevpriv((void **)&priv)) != 0) 1926 return (err); 1927 d = priv->sc; 1928 if (PCM_DETACHING(d) || !DSP_REGISTERED(d)) 1929 return (EINVAL); 1930 1931 PCM_GIANT_ENTER(d); 1932 1933 getchns(priv, SD_F_PRIO_RD | SD_F_PRIO_WR); 1934 wrch = priv->wrch; 1935 rdch = priv->rdch; 1936 1937 c = ((nprot & PROT_WRITE) != 0) ? wrch : rdch; 1938 if (c == NULL || (c->flags & CHN_F_MMAP_INVALID) || 1939 (*offset + size) > sndbuf_getallocsize(c->bufsoft) || 1940 (wrch != NULL && (wrch->flags & CHN_F_MMAP_INVALID)) || 1941 (rdch != NULL && (rdch->flags & CHN_F_MMAP_INVALID))) { 1942 relchns(priv, SD_F_PRIO_RD | SD_F_PRIO_WR); 1943 PCM_GIANT_EXIT(d); 1944 return (EINVAL); 1945 } 1946 1947 if (wrch != NULL) 1948 wrch->flags |= CHN_F_MMAP; 1949 if (rdch != NULL) 1950 rdch->flags |= CHN_F_MMAP; 1951 1952 *offset = (uintptr_t)sndbuf_getbufofs(c->bufsoft, *offset); 1953 relchns(priv, SD_F_PRIO_RD | SD_F_PRIO_WR); 1954 *object = vm_pager_allocate(OBJT_DEVICE, i_dev, 1955 size, nprot, *offset, curthread->td_ucred); 1956 1957 PCM_GIANT_LEAVE(d); 1958 1959 if (*object == NULL) 1960 return (EINVAL); 1961 return (0); 1962 } 1963 1964 static void 1965 dsp_clone(void *arg, struct ucred *cred, char *name, int namelen, 1966 struct cdev **dev) 1967 { 1968 struct snddev_info *d; 1969 size_t i; 1970 1971 if (*dev != NULL) 1972 return; 1973 if (strcmp(name, "dsp") == 0 && dsp_basename_clone) 1974 goto found; 1975 for (i = 0; i < nitems(dsp_cdevs); i++) { 1976 if (dsp_cdevs[i].alias != NULL && 1977 strcmp(name, dsp_cdevs[i].name) == 0) 1978 goto found; 1979 } 1980 return; 1981 found: 1982 bus_topo_lock(); 1983 d = devclass_get_softc(pcm_devclass, snd_unit); 1984 /* 1985 * If we only have a single soundcard attached and we detach it right 1986 * before entering dsp_clone(), there is a chance pcm_unregister() will 1987 * have returned already, meaning it will have set snd_unit to -1, and 1988 * thus devclass_get_softc() will return NULL here. 1989 */ 1990 if (d != NULL && PCM_REGISTERED(d) && d->dsp_dev != NULL) { 1991 *dev = d->dsp_dev; 1992 dev_ref(*dev); 1993 } 1994 bus_topo_unlock(); 1995 } 1996 1997 static void 1998 dsp_sysinit(void *p) 1999 { 2000 if (dsp_ehtag != NULL) 2001 return; 2002 dsp_ehtag = EVENTHANDLER_REGISTER(dev_clone, dsp_clone, 0, 1000); 2003 } 2004 2005 static void 2006 dsp_sysuninit(void *p) 2007 { 2008 if (dsp_ehtag == NULL) 2009 return; 2010 EVENTHANDLER_DEREGISTER(dev_clone, dsp_ehtag); 2011 dsp_ehtag = NULL; 2012 } 2013 2014 SYSINIT(dsp_sysinit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysinit, NULL); 2015 SYSUNINIT(dsp_sysuninit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysuninit, NULL); 2016 2017 char * 2018 dsp_unit2name(char *buf, size_t len, struct pcm_channel *ch) 2019 { 2020 size_t i; 2021 2022 KASSERT(buf != NULL && len != 0, 2023 ("bogus buf=%p len=%ju", buf, (uintmax_t)len)); 2024 2025 for (i = 0; i < nitems(dsp_cdevs); i++) { 2026 if (ch->type != dsp_cdevs[i].type || dsp_cdevs[i].alias != NULL) 2027 continue; 2028 snprintf(buf, len, "%s%d%s%d", 2029 dsp_cdevs[i].name, device_get_unit(ch->dev), 2030 dsp_cdevs[i].sep, ch->unit); 2031 return (buf); 2032 } 2033 2034 return (NULL); 2035 } 2036 2037 static int 2038 dsp_oss_audioinfo_cb(void *data, void *arg) 2039 { 2040 struct dsp_cdevpriv *priv = data; 2041 struct pcm_channel *ch = arg; 2042 2043 if (DSP_REGISTERED(priv->sc) && (ch == priv->rdch || ch == priv->wrch)) 2044 return (1); 2045 2046 return (0); 2047 } 2048 2049 /** 2050 * @brief Handler for SNDCTL_AUDIOINFO. 2051 * 2052 * Gathers information about the audio device specified in ai->dev. If 2053 * ai->dev == -1, then this function gathers information about the current 2054 * device. If the call comes in on a non-audio device and ai->dev == -1, 2055 * return EINVAL. 2056 * 2057 * This routine is supposed to go practically straight to the hardware, 2058 * getting capabilities directly from the sound card driver, side-stepping 2059 * the intermediate channel interface. 2060 * 2061 * @note 2062 * Calling threads must not hold any snddev_info or pcm_channel locks. 2063 * 2064 * @param dev device on which the ioctl was issued 2065 * @param ai ioctl request data container 2066 * 2067 * @retval 0 success 2068 * @retval EINVAL ai->dev specifies an invalid device 2069 * 2070 * @todo Verify correctness of Doxygen tags. ;) 2071 */ 2072 int 2073 dsp_oss_audioinfo(struct cdev *i_dev, oss_audioinfo *ai) 2074 { 2075 struct pcmchan_caps *caps; 2076 struct pcm_channel *ch; 2077 struct snddev_info *d; 2078 uint32_t fmts; 2079 int i, nchan, *rates, minch, maxch, unit; 2080 char *devname, buf[CHN_NAMELEN]; 2081 2082 /* 2083 * If probing the device that received the ioctl, make sure it's a 2084 * DSP device. (Users may use this ioctl with /dev/mixer and 2085 * /dev/midi.) 2086 */ 2087 if (ai->dev == -1 && i_dev->si_devsw != &dsp_cdevsw) 2088 return (EINVAL); 2089 2090 ch = NULL; 2091 devname = NULL; 2092 nchan = 0; 2093 bzero(buf, sizeof(buf)); 2094 2095 /* 2096 * Search for the requested audio device (channel). Start by 2097 * iterating over pcm devices. 2098 */ 2099 for (unit = 0; pcm_devclass != NULL && 2100 unit < devclass_get_maxunit(pcm_devclass); unit++) { 2101 d = devclass_get_softc(pcm_devclass, unit); 2102 if (!PCM_REGISTERED(d)) 2103 continue; 2104 2105 /* XXX Need Giant magic entry ??? */ 2106 2107 /* See the note in function docblock */ 2108 PCM_UNLOCKASSERT(d); 2109 PCM_LOCK(d); 2110 2111 CHN_FOREACH(ch, d, channels.pcm) { 2112 CHN_UNLOCKASSERT(ch); 2113 CHN_LOCK(ch); 2114 if (ai->dev == -1) { 2115 if (devfs_foreach_cdevpriv(i_dev, 2116 dsp_oss_audioinfo_cb, ch) != 0) { 2117 devname = dsp_unit2name(buf, 2118 sizeof(buf), ch); 2119 } 2120 } else if (ai->dev == nchan) 2121 devname = dsp_unit2name(buf, sizeof(buf), ch); 2122 if (devname != NULL) 2123 break; 2124 CHN_UNLOCK(ch); 2125 ++nchan; 2126 } 2127 2128 if (devname != NULL) { 2129 /* 2130 * At this point, the following synchronization stuff 2131 * has happened: 2132 * - a specific PCM device is locked. 2133 * - a specific audio channel has been locked, so be 2134 * sure to unlock when exiting; 2135 */ 2136 2137 caps = chn_getcaps(ch); 2138 2139 /* 2140 * With all handles collected, zero out the user's 2141 * container and begin filling in its fields. 2142 */ 2143 bzero((void *)ai, sizeof(oss_audioinfo)); 2144 2145 ai->dev = nchan; 2146 strlcpy(ai->name, ch->name, sizeof(ai->name)); 2147 2148 if ((ch->flags & CHN_F_BUSY) == 0) 2149 ai->busy = 0; 2150 else 2151 ai->busy = (ch->direction == PCMDIR_PLAY) ? OPEN_WRITE : OPEN_READ; 2152 2153 /** 2154 * @note 2155 * @c cmd - OSSv4 docs: "Only supported under Linux at 2156 * this moment." Cop-out, I know, but I'll save 2157 * running around in the process table for later. 2158 * Is there a risk of leaking information? 2159 */ 2160 ai->pid = ch->pid; 2161 2162 /* 2163 * These flags stolen from SNDCTL_DSP_GETCAPS handler. 2164 * Note, however, that a single channel operates in 2165 * only one direction, so PCM_CAP_DUPLEX is out. 2166 */ 2167 /** 2168 * @todo @c SNDCTL_AUDIOINFO::caps - Make drivers keep 2169 * these in pcmchan::caps? 2170 */ 2171 ai->caps = PCM_CAP_REALTIME | PCM_CAP_MMAP | PCM_CAP_TRIGGER | 2172 ((ch->flags & CHN_F_VIRTUAL) ? PCM_CAP_VIRTUAL : 0) | 2173 ((ch->direction == PCMDIR_PLAY) ? PCM_CAP_OUTPUT : PCM_CAP_INPUT); 2174 2175 /* 2176 * Collect formats supported @b natively by the 2177 * device. Also determine min/max channels. (I.e., 2178 * mono, stereo, or both?) 2179 * 2180 * If any channel is stereo, maxch = 2; 2181 * if all channels are stereo, minch = 2, too; 2182 * if any channel is mono, minch = 1; 2183 * and if all channels are mono, maxch = 1. 2184 */ 2185 minch = 0; 2186 maxch = 0; 2187 fmts = 0; 2188 for (i = 0; caps->fmtlist[i]; i++) { 2189 fmts |= caps->fmtlist[i]; 2190 if (AFMT_CHANNEL(caps->fmtlist[i]) > 1) { 2191 minch = (minch == 0) ? 2 : minch; 2192 maxch = 2; 2193 } else { 2194 minch = 1; 2195 maxch = (maxch == 0) ? 1 : maxch; 2196 } 2197 } 2198 2199 if (ch->direction == PCMDIR_PLAY) 2200 ai->oformats = fmts; 2201 else 2202 ai->iformats = fmts; 2203 2204 /** 2205 * @note 2206 * @c magic - OSSv4 docs: "Reserved for internal use 2207 * by OSS." 2208 * 2209 * @par 2210 * @c card_number - OSSv4 docs: "Number of the sound 2211 * card where this device belongs or -1 if this 2212 * information is not available. Applications 2213 * should normally not use this field for any 2214 * purpose." 2215 */ 2216 ai->card_number = -1; 2217 /** 2218 * @todo @c song_name - depends first on 2219 * SNDCTL_[GS]ETSONG @todo @c label - depends 2220 * on SNDCTL_[GS]ETLABEL 2221 * @todo @c port_number - routing information? 2222 */ 2223 ai->port_number = -1; 2224 ai->mixer_dev = (d->mixer_dev != NULL) ? unit : -1; 2225 /** 2226 * @note 2227 * @c legacy_device - OSSv4 docs: "Obsolete." 2228 */ 2229 ai->legacy_device = -1; 2230 snprintf(ai->devnode, sizeof(ai->devnode), "/dev/dsp%d", unit); 2231 ai->enabled = device_is_attached(d->dev) ? 1 : 0; 2232 /** 2233 * @note 2234 * @c flags - OSSv4 docs: "Reserved for future use." 2235 * 2236 * @note 2237 * @c binding - OSSv4 docs: "Reserved for future use." 2238 * 2239 * @todo @c handle - haven't decided how to generate 2240 * this yet; bus, vendor, device IDs? 2241 */ 2242 ai->min_rate = caps->minspeed; 2243 ai->max_rate = caps->maxspeed; 2244 2245 ai->min_channels = minch; 2246 ai->max_channels = maxch; 2247 2248 ai->nrates = chn_getrates(ch, &rates); 2249 if (ai->nrates > OSS_MAX_SAMPLE_RATES) 2250 ai->nrates = OSS_MAX_SAMPLE_RATES; 2251 2252 for (i = 0; i < ai->nrates; i++) 2253 ai->rates[i] = rates[i]; 2254 2255 ai->next_play_engine = 0; 2256 ai->next_rec_engine = 0; 2257 2258 CHN_UNLOCK(ch); 2259 } 2260 2261 PCM_UNLOCK(d); 2262 2263 if (devname != NULL) 2264 return (0); 2265 } 2266 2267 /* Exhausted the search -- nothing is locked, so return. */ 2268 return (EINVAL); 2269 } 2270 2271 /** 2272 * @brief Assigns a PCM channel to a sync group. 2273 * 2274 * Sync groups are used to enable audio operations on multiple devices 2275 * simultaneously. They may be used with any number of devices and may 2276 * span across applications. Devices are added to groups with 2277 * the SNDCTL_DSP_SYNCGROUP ioctl, and operations are triggered with the 2278 * SNDCTL_DSP_SYNCSTART ioctl. 2279 * 2280 * If the @c id field of the @c group parameter is set to zero, then a new 2281 * sync group is created. Otherwise, wrch and rdch (if set) are added to 2282 * the group specified. 2283 * 2284 * @todo As far as memory allocation, should we assume that things are 2285 * okay and allocate with M_WAITOK before acquiring channel locks, 2286 * freeing later if not? 2287 * 2288 * @param wrch output channel associated w/ device (if any) 2289 * @param rdch input channel associated w/ device (if any) 2290 * @param group Sync group parameters 2291 * 2292 * @retval 0 success 2293 * @retval non-zero error to be propagated upstream 2294 */ 2295 static int 2296 dsp_oss_syncgroup(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_syncgroup *group) 2297 { 2298 struct pcmchan_syncmember *smrd, *smwr; 2299 struct pcmchan_syncgroup *sg; 2300 int ret, sg_ids[3]; 2301 2302 smrd = NULL; 2303 smwr = NULL; 2304 sg = NULL; 2305 ret = 0; 2306 2307 /* 2308 * Free_unr() may sleep, so store released syncgroup IDs until after 2309 * all locks are released. 2310 */ 2311 sg_ids[0] = sg_ids[1] = sg_ids[2] = 0; 2312 2313 PCM_SG_LOCK(); 2314 2315 /* 2316 * - Insert channel(s) into group's member list. 2317 * - Set CHN_F_NOTRIGGER on channel(s). 2318 * - Stop channel(s). 2319 */ 2320 2321 /* 2322 * If device's channels are already mapped to a group, unmap them. 2323 */ 2324 if (wrch) { 2325 CHN_LOCK(wrch); 2326 sg_ids[0] = chn_syncdestroy(wrch); 2327 } 2328 2329 if (rdch) { 2330 CHN_LOCK(rdch); 2331 sg_ids[1] = chn_syncdestroy(rdch); 2332 } 2333 2334 /* 2335 * Verify that mode matches character device properites. 2336 * - Bail if PCM_ENABLE_OUTPUT && wrch == NULL. 2337 * - Bail if PCM_ENABLE_INPUT && rdch == NULL. 2338 */ 2339 if (((wrch == NULL) && (group->mode & PCM_ENABLE_OUTPUT)) || 2340 ((rdch == NULL) && (group->mode & PCM_ENABLE_INPUT))) { 2341 ret = EINVAL; 2342 goto out; 2343 } 2344 2345 /* 2346 * An id of zero indicates the user wants to create a new 2347 * syncgroup. 2348 */ 2349 if (group->id == 0) { 2350 sg = (struct pcmchan_syncgroup *)malloc(sizeof(*sg), M_DEVBUF, M_NOWAIT); 2351 if (sg != NULL) { 2352 SLIST_INIT(&sg->members); 2353 sg->id = alloc_unr(pcmsg_unrhdr); 2354 2355 group->id = sg->id; 2356 SLIST_INSERT_HEAD(&snd_pcm_syncgroups, sg, link); 2357 } else 2358 ret = ENOMEM; 2359 } else { 2360 SLIST_FOREACH(sg, &snd_pcm_syncgroups, link) { 2361 if (sg->id == group->id) 2362 break; 2363 } 2364 if (sg == NULL) 2365 ret = EINVAL; 2366 } 2367 2368 /* Couldn't create or find a syncgroup. Fail. */ 2369 if (sg == NULL) 2370 goto out; 2371 2372 /* 2373 * Allocate a syncmember, assign it and a channel together, and 2374 * insert into syncgroup. 2375 */ 2376 if (group->mode & PCM_ENABLE_INPUT) { 2377 smrd = (struct pcmchan_syncmember *)malloc(sizeof(*smrd), M_DEVBUF, M_NOWAIT); 2378 if (smrd == NULL) { 2379 ret = ENOMEM; 2380 goto out; 2381 } 2382 2383 SLIST_INSERT_HEAD(&sg->members, smrd, link); 2384 smrd->parent = sg; 2385 smrd->ch = rdch; 2386 2387 chn_abort(rdch); 2388 rdch->flags |= CHN_F_NOTRIGGER; 2389 rdch->sm = smrd; 2390 } 2391 2392 if (group->mode & PCM_ENABLE_OUTPUT) { 2393 smwr = (struct pcmchan_syncmember *)malloc(sizeof(*smwr), M_DEVBUF, M_NOWAIT); 2394 if (smwr == NULL) { 2395 ret = ENOMEM; 2396 goto out; 2397 } 2398 2399 SLIST_INSERT_HEAD(&sg->members, smwr, link); 2400 smwr->parent = sg; 2401 smwr->ch = wrch; 2402 2403 chn_abort(wrch); 2404 wrch->flags |= CHN_F_NOTRIGGER; 2405 wrch->sm = smwr; 2406 } 2407 2408 out: 2409 if (ret != 0) { 2410 if (smrd != NULL) 2411 free(smrd, M_DEVBUF); 2412 if ((sg != NULL) && SLIST_EMPTY(&sg->members)) { 2413 sg_ids[2] = sg->id; 2414 SLIST_REMOVE(&snd_pcm_syncgroups, sg, pcmchan_syncgroup, link); 2415 free(sg, M_DEVBUF); 2416 } 2417 2418 if (wrch) 2419 wrch->sm = NULL; 2420 if (rdch) 2421 rdch->sm = NULL; 2422 } 2423 2424 if (wrch) 2425 CHN_UNLOCK(wrch); 2426 if (rdch) 2427 CHN_UNLOCK(rdch); 2428 2429 PCM_SG_UNLOCK(); 2430 2431 if (sg_ids[0]) 2432 free_unr(pcmsg_unrhdr, sg_ids[0]); 2433 if (sg_ids[1]) 2434 free_unr(pcmsg_unrhdr, sg_ids[1]); 2435 if (sg_ids[2]) 2436 free_unr(pcmsg_unrhdr, sg_ids[2]); 2437 2438 return (ret); 2439 } 2440 2441 /** 2442 * @brief Launch a sync group into action 2443 * 2444 * Sync groups are established via SNDCTL_DSP_SYNCGROUP. This function 2445 * iterates over all members, triggering them along the way. 2446 * 2447 * @note Caller must not hold any channel locks. 2448 * 2449 * @param sg_id sync group identifier 2450 * 2451 * @retval 0 success 2452 * @retval non-zero error worthy of propagating upstream to user 2453 */ 2454 static int 2455 dsp_oss_syncstart(int sg_id) 2456 { 2457 struct pcmchan_syncmember *sm, *sm_tmp; 2458 struct pcmchan_syncgroup *sg; 2459 struct pcm_channel *c; 2460 int ret, needlocks; 2461 2462 /* Get the synclists lock */ 2463 PCM_SG_LOCK(); 2464 2465 do { 2466 ret = 0; 2467 needlocks = 0; 2468 2469 /* Search for syncgroup by ID */ 2470 SLIST_FOREACH(sg, &snd_pcm_syncgroups, link) { 2471 if (sg->id == sg_id) 2472 break; 2473 } 2474 2475 /* Return EINVAL if not found */ 2476 if (sg == NULL) { 2477 ret = EINVAL; 2478 break; 2479 } 2480 2481 /* Any removals resulting in an empty group should've handled this */ 2482 KASSERT(!SLIST_EMPTY(&sg->members), ("found empty syncgroup")); 2483 2484 /* 2485 * Attempt to lock all member channels - if any are already 2486 * locked, unlock those acquired, sleep for a bit, and try 2487 * again. 2488 */ 2489 SLIST_FOREACH(sm, &sg->members, link) { 2490 if (CHN_TRYLOCK(sm->ch) == 0) { 2491 int timo = hz * 5/1000; 2492 if (timo < 1) 2493 timo = 1; 2494 2495 /* Release all locked channels so far, retry */ 2496 SLIST_FOREACH(sm_tmp, &sg->members, link) { 2497 /* sm is the member already locked */ 2498 if (sm == sm_tmp) 2499 break; 2500 CHN_UNLOCK(sm_tmp->ch); 2501 } 2502 2503 /** @todo Is PRIBIO correct/ */ 2504 ret = msleep(sm, &snd_pcm_syncgroups_mtx, 2505 PRIBIO | PCATCH, "pcmsg", timo); 2506 if (ret == EINTR || ret == ERESTART) 2507 break; 2508 2509 needlocks = 1; 2510 ret = 0; /* Assumes ret == EAGAIN... */ 2511 } 2512 } 2513 } while (needlocks && ret == 0); 2514 2515 /* Proceed only if no errors encountered. */ 2516 if (ret == 0) { 2517 /* Launch channels */ 2518 while ((sm = SLIST_FIRST(&sg->members)) != NULL) { 2519 SLIST_REMOVE_HEAD(&sg->members, link); 2520 2521 c = sm->ch; 2522 c->sm = NULL; 2523 chn_start(c, 1); 2524 c->flags &= ~CHN_F_NOTRIGGER; 2525 CHN_UNLOCK(c); 2526 2527 free(sm, M_DEVBUF); 2528 } 2529 2530 SLIST_REMOVE(&snd_pcm_syncgroups, sg, pcmchan_syncgroup, link); 2531 free(sg, M_DEVBUF); 2532 } 2533 2534 PCM_SG_UNLOCK(); 2535 2536 /* 2537 * Free_unr() may sleep, so be sure to give up the syncgroup lock 2538 * first. 2539 */ 2540 if (ret == 0) 2541 free_unr(pcmsg_unrhdr, sg_id); 2542 2543 return (ret); 2544 } 2545 2546 /** 2547 * @brief Handler for SNDCTL_DSP_POLICY 2548 * 2549 * The SNDCTL_DSP_POLICY ioctl is a simpler interface to control fragment 2550 * size and count like with SNDCTL_DSP_SETFRAGMENT. Instead of the user 2551 * specifying those two parameters, s/he simply selects a number from 0..10 2552 * which corresponds to a buffer size. Smaller numbers request smaller 2553 * buffers with lower latencies (at greater overhead from more frequent 2554 * interrupts), while greater numbers behave in the opposite manner. 2555 * 2556 * The 4Front spec states that a value of 5 should be the default. However, 2557 * this implementation deviates slightly by using a linear scale without 2558 * consulting drivers. I.e., even though drivers may have different default 2559 * buffer sizes, a policy argument of 5 will have the same result across 2560 * all drivers. 2561 * 2562 * See http://manuals.opensound.com/developer/SNDCTL_DSP_POLICY.html for 2563 * more information. 2564 * 2565 * @todo When SNDCTL_DSP_COOKEDMODE is supported, it'll be necessary to 2566 * work with hardware drivers directly. 2567 * 2568 * @note PCM channel arguments must not be locked by caller. 2569 * 2570 * @param wrch Pointer to opened playback channel (optional; may be NULL) 2571 * @param rdch " recording channel (optional; may be NULL) 2572 * @param policy Integer from [0:10] 2573 * 2574 * @retval 0 constant (for now) 2575 */ 2576 static int 2577 dsp_oss_policy(struct pcm_channel *wrch, struct pcm_channel *rdch, int policy) 2578 { 2579 int ret; 2580 2581 if (policy < CHN_POLICY_MIN || policy > CHN_POLICY_MAX) 2582 return (EIO); 2583 2584 /* Default: success */ 2585 ret = 0; 2586 2587 if (rdch) { 2588 CHN_LOCK(rdch); 2589 ret = chn_setlatency(rdch, policy); 2590 CHN_UNLOCK(rdch); 2591 } 2592 2593 if (wrch && ret == 0) { 2594 CHN_LOCK(wrch); 2595 ret = chn_setlatency(wrch, policy); 2596 CHN_UNLOCK(wrch); 2597 } 2598 2599 if (ret) 2600 ret = EIO; 2601 2602 return (ret); 2603 } 2604 2605 /** 2606 * @brief Enable or disable "cooked" mode 2607 * 2608 * This is a handler for @c SNDCTL_DSP_COOKEDMODE. When in cooked mode, which 2609 * is the default, the sound system handles rate and format conversions 2610 * automatically (ex: user writing 11025Hz/8 bit/unsigned but card only 2611 * operates with 44100Hz/16bit/signed samples). 2612 * 2613 * Disabling cooked mode is intended for applications wanting to mmap() 2614 * a sound card's buffer space directly, bypassing the FreeBSD 2-stage 2615 * feeder architecture, presumably to gain as much control over audio 2616 * hardware as possible. 2617 * 2618 * See @c http://manuals.opensound.com/developer/SNDCTL_DSP_COOKEDMODE.html 2619 * for more details. 2620 * 2621 * @param wrch playback channel (optional; may be NULL) 2622 * @param rdch recording channel (optional; may be NULL) 2623 * @param enabled 0 = raw mode, 1 = cooked mode 2624 * 2625 * @retval EINVAL Operation not yet supported. 2626 */ 2627 static int 2628 dsp_oss_cookedmode(struct pcm_channel *wrch, struct pcm_channel *rdch, int enabled) 2629 { 2630 2631 /* 2632 * XXX I just don't get it. Why don't they call it 2633 * "BITPERFECT" ~ SNDCTL_DSP_BITPERFECT !?!?. 2634 * This is just plain so confusing, incoherent, 2635 * <insert any non-printable characters here>. 2636 */ 2637 if (!(enabled == 1 || enabled == 0)) 2638 return (EINVAL); 2639 2640 /* 2641 * I won't give in. I'm inverting its logic here and now. 2642 * Brag all you want, but "BITPERFECT" should be the better 2643 * term here. 2644 */ 2645 enabled ^= 0x00000001; 2646 2647 if (wrch != NULL) { 2648 CHN_LOCK(wrch); 2649 wrch->flags &= ~CHN_F_BITPERFECT; 2650 wrch->flags |= (enabled != 0) ? CHN_F_BITPERFECT : 0x00000000; 2651 CHN_UNLOCK(wrch); 2652 } 2653 2654 if (rdch != NULL) { 2655 CHN_LOCK(rdch); 2656 rdch->flags &= ~CHN_F_BITPERFECT; 2657 rdch->flags |= (enabled != 0) ? CHN_F_BITPERFECT : 0x00000000; 2658 CHN_UNLOCK(rdch); 2659 } 2660 2661 return (0); 2662 } 2663 2664 /** 2665 * @brief Retrieve channel interleaving order 2666 * 2667 * This is the handler for @c SNDCTL_DSP_GET_CHNORDER. 2668 * 2669 * See @c http://manuals.opensound.com/developer/SNDCTL_DSP_GET_CHNORDER.html 2670 * for more details. 2671 * 2672 * @note As the ioctl definition is still under construction, FreeBSD 2673 * does not currently support SNDCTL_DSP_GET_CHNORDER. 2674 * 2675 * @param wrch playback channel (optional; may be NULL) 2676 * @param rdch recording channel (optional; may be NULL) 2677 * @param map channel map (result will be stored there) 2678 * 2679 * @retval EINVAL Operation not yet supported. 2680 */ 2681 static int 2682 dsp_oss_getchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map) 2683 { 2684 struct pcm_channel *ch; 2685 int ret; 2686 2687 ch = (wrch != NULL) ? wrch : rdch; 2688 if (ch != NULL) { 2689 CHN_LOCK(ch); 2690 ret = chn_oss_getorder(ch, map); 2691 CHN_UNLOCK(ch); 2692 } else 2693 ret = EINVAL; 2694 2695 return (ret); 2696 } 2697 2698 /** 2699 * @brief Specify channel interleaving order 2700 * 2701 * This is the handler for @c SNDCTL_DSP_SET_CHNORDER. 2702 * 2703 * @note As the ioctl definition is still under construction, FreeBSD 2704 * does not currently support @c SNDCTL_DSP_SET_CHNORDER. 2705 * 2706 * @param wrch playback channel (optional; may be NULL) 2707 * @param rdch recording channel (optional; may be NULL) 2708 * @param map channel map 2709 * 2710 * @retval EINVAL Operation not yet supported. 2711 */ 2712 static int 2713 dsp_oss_setchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map) 2714 { 2715 int ret; 2716 2717 ret = 0; 2718 2719 if (wrch != NULL) { 2720 CHN_LOCK(wrch); 2721 ret = chn_oss_setorder(wrch, map); 2722 CHN_UNLOCK(wrch); 2723 } 2724 2725 if (ret == 0 && rdch != NULL) { 2726 CHN_LOCK(rdch); 2727 ret = chn_oss_setorder(rdch, map); 2728 CHN_UNLOCK(rdch); 2729 } 2730 2731 return (ret); 2732 } 2733 2734 static int 2735 dsp_oss_getchannelmask(struct pcm_channel *wrch, struct pcm_channel *rdch, 2736 int *mask) 2737 { 2738 struct pcm_channel *ch; 2739 uint32_t chnmask; 2740 int ret; 2741 2742 chnmask = 0; 2743 ch = (wrch != NULL) ? wrch : rdch; 2744 2745 if (ch != NULL) { 2746 CHN_LOCK(ch); 2747 ret = chn_oss_getmask(ch, &chnmask); 2748 CHN_UNLOCK(ch); 2749 } else 2750 ret = EINVAL; 2751 2752 if (ret == 0) 2753 *mask = chnmask; 2754 2755 return (ret); 2756 } 2757 2758 #ifdef OSSV4_EXPERIMENT 2759 /** 2760 * @brief Retrieve an audio device's label 2761 * 2762 * This is a handler for the @c SNDCTL_GETLABEL ioctl. 2763 * 2764 * See @c http://manuals.opensound.com/developer/SNDCTL_GETLABEL.html 2765 * for more details. 2766 * 2767 * From Hannu@4Front: "For example ossxmix (just like some HW mixer 2768 * consoles) can show variable "labels" for certain controls. By default 2769 * the application name (say quake) is shown as the label but 2770 * applications may change the labels themselves." 2771 * 2772 * @note As the ioctl definition is still under construction, FreeBSD 2773 * does not currently support @c SNDCTL_GETLABEL. 2774 * 2775 * @param wrch playback channel (optional; may be NULL) 2776 * @param rdch recording channel (optional; may be NULL) 2777 * @param label label gets copied here 2778 * 2779 * @retval EINVAL Operation not yet supported. 2780 */ 2781 static int 2782 dsp_oss_getlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label) 2783 { 2784 return (EINVAL); 2785 } 2786 2787 /** 2788 * @brief Specify an audio device's label 2789 * 2790 * This is a handler for the @c SNDCTL_SETLABEL ioctl. Please see the 2791 * comments for @c dsp_oss_getlabel immediately above. 2792 * 2793 * See @c http://manuals.opensound.com/developer/SNDCTL_GETLABEL.html 2794 * for more details. 2795 * 2796 * @note As the ioctl definition is still under construction, FreeBSD 2797 * does not currently support SNDCTL_SETLABEL. 2798 * 2799 * @param wrch playback channel (optional; may be NULL) 2800 * @param rdch recording channel (optional; may be NULL) 2801 * @param label label gets copied from here 2802 * 2803 * @retval EINVAL Operation not yet supported. 2804 */ 2805 static int 2806 dsp_oss_setlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label) 2807 { 2808 return (EINVAL); 2809 } 2810 2811 /** 2812 * @brief Retrieve name of currently played song 2813 * 2814 * This is a handler for the @c SNDCTL_GETSONG ioctl. Audio players could 2815 * tell the system the name of the currently playing song, which would be 2816 * visible in @c /dev/sndstat. 2817 * 2818 * See @c http://manuals.opensound.com/developer/SNDCTL_GETSONG.html 2819 * for more details. 2820 * 2821 * @note As the ioctl definition is still under construction, FreeBSD 2822 * does not currently support SNDCTL_GETSONG. 2823 * 2824 * @param wrch playback channel (optional; may be NULL) 2825 * @param rdch recording channel (optional; may be NULL) 2826 * @param song song name gets copied here 2827 * 2828 * @retval EINVAL Operation not yet supported. 2829 */ 2830 static int 2831 dsp_oss_getsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song) 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_SETSONG 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_SETSONG.html 2844 * for more details. 2845 * 2846 * @note As the ioctl definition is still under construction, FreeBSD 2847 * does not currently support SNDCTL_SETSONG. 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 from here 2852 * 2853 * @retval EINVAL Operation not yet supported. 2854 */ 2855 static int 2856 dsp_oss_setsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song) 2857 { 2858 return (EINVAL); 2859 } 2860 2861 /** 2862 * @brief Rename a device 2863 * 2864 * This is a handler for the @c SNDCTL_SETNAME ioctl. 2865 * 2866 * See @c http://manuals.opensound.com/developer/SNDCTL_SETNAME.html for 2867 * more details. 2868 * 2869 * From Hannu@4Front: "This call is used to change the device name 2870 * reported in /dev/sndstat and ossinfo. So instead of using some generic 2871 * 'OSS loopback audio (MIDI) driver' the device may be given a meaningfull 2872 * name depending on the current context (for example 'OSS virtual wave table 2873 * synth' or 'VoIP link to London')." 2874 * 2875 * @note As the ioctl definition is still under construction, FreeBSD 2876 * does not currently support SNDCTL_SETNAME. 2877 * 2878 * @param wrch playback channel (optional; may be NULL) 2879 * @param rdch recording channel (optional; may be NULL) 2880 * @param name new device name gets copied from here 2881 * 2882 * @retval EINVAL Operation not yet supported. 2883 */ 2884 static int 2885 dsp_oss_setname(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *name) 2886 { 2887 return (EINVAL); 2888 } 2889 #endif /* !OSSV4_EXPERIMENT */ 2890