1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2005-2009 Ariff Abdullah <ariff@FreeBSD.org> 5 * Portions Copyright (c) Ryan Beasley <ryan.beasley@gmail.com> - GSoC 2006 6 * Copyright (c) 1999 Cameron Grant <cg@FreeBSD.org> 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #ifdef HAVE_KERNEL_OPTION_HEADERS 32 #include "opt_snd.h" 33 #endif 34 35 #include <dev/sound/pcm/sound.h> 36 #include <sys/ctype.h> 37 #include <sys/lock.h> 38 #include <sys/rwlock.h> 39 #include <sys/sysent.h> 40 41 #include <vm/vm.h> 42 #include <vm/vm_object.h> 43 #include <vm/vm_page.h> 44 #include <vm/vm_pager.h> 45 46 struct dsp_cdevpriv { 47 struct snddev_info *sc; 48 struct pcm_channel *rdch; 49 struct pcm_channel *wrch; 50 struct pcm_channel *volch; 51 int simplex; 52 }; 53 54 static int dsp_mmap_allow_prot_exec = 0; 55 SYSCTL_INT(_hw_snd, OID_AUTO, compat_linux_mmap, CTLFLAG_RWTUN, 56 &dsp_mmap_allow_prot_exec, 0, 57 "linux mmap compatibility (-1=force disable 0=auto 1=force enable)"); 58 59 static int dsp_basename_clone = 1; 60 SYSCTL_INT(_hw_snd, OID_AUTO, basename_clone, CTLFLAG_RWTUN, 61 &dsp_basename_clone, 0, 62 "DSP basename cloning (0: Disable; 1: Enabled)"); 63 64 #define DSP_REGISTERED(x) (PCM_REGISTERED(x) && (x)->dsp_dev != NULL) 65 66 #define OLDPCM_IOCTL 67 68 static d_open_t dsp_open; 69 static d_read_t dsp_read; 70 static d_write_t dsp_write; 71 static d_ioctl_t dsp_ioctl; 72 static d_poll_t dsp_poll; 73 static d_mmap_t dsp_mmap; 74 static d_mmap_single_t dsp_mmap_single; 75 76 struct cdevsw dsp_cdevsw = { 77 .d_version = D_VERSION, 78 .d_open = dsp_open, 79 .d_read = dsp_read, 80 .d_write = dsp_write, 81 .d_ioctl = dsp_ioctl, 82 .d_poll = dsp_poll, 83 .d_mmap = dsp_mmap, 84 .d_mmap_single = dsp_mmap_single, 85 .d_name = "dsp", 86 }; 87 88 static eventhandler_tag dsp_ehtag = NULL; 89 90 static int dsp_oss_syncgroup(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_syncgroup *group); 91 static int dsp_oss_syncstart(int sg_id); 92 static int dsp_oss_policy(struct pcm_channel *wrch, struct pcm_channel *rdch, int policy); 93 static int dsp_oss_cookedmode(struct pcm_channel *wrch, struct pcm_channel *rdch, int enabled); 94 static int dsp_oss_getchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map); 95 static int dsp_oss_setchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map); 96 static int dsp_oss_getchannelmask(struct pcm_channel *wrch, struct pcm_channel *rdch, int *mask); 97 #ifdef OSSV4_EXPERIMENT 98 static int dsp_oss_getlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label); 99 static int dsp_oss_setlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label); 100 static int dsp_oss_getsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song); 101 static int dsp_oss_setsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song); 102 static int dsp_oss_setname(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *name); 103 #endif 104 105 static uint32_t 106 dsp_get_flags(struct cdev *dev) 107 { 108 device_t bdev; 109 110 bdev = devclass_get_device(pcm_devclass, PCMUNIT(dev)); 111 112 return ((bdev != NULL) ? pcm_getflags(bdev) : 0xffffffff); 113 } 114 115 static void 116 dsp_set_flags(struct cdev *dev, uint32_t flags) 117 { 118 device_t bdev; 119 120 bdev = devclass_get_device(pcm_devclass, PCMUNIT(dev)); 121 122 if (bdev != NULL) 123 pcm_setflags(bdev, flags); 124 } 125 126 int 127 dsp_make_dev(device_t dev) 128 { 129 struct make_dev_args devargs; 130 struct snddev_info *sc; 131 int err, unit; 132 133 sc = device_get_softc(dev); 134 unit = device_get_unit(dev); 135 136 make_dev_args_init(&devargs); 137 devargs.mda_devsw = &dsp_cdevsw; 138 devargs.mda_uid = UID_ROOT; 139 devargs.mda_gid = GID_WHEEL; 140 devargs.mda_mode = 0666; 141 devargs.mda_si_drv1 = sc; 142 err = make_dev_s(&devargs, &sc->dsp_dev, "dsp%d", unit); 143 if (err != 0) { 144 device_printf(dev, "failed to create dsp%d: error %d", 145 unit, err); 146 return (ENXIO); 147 } 148 149 return (0); 150 } 151 152 void 153 dsp_destroy_dev(device_t dev) 154 { 155 struct snddev_info *d; 156 157 d = device_get_softc(dev); 158 destroy_dev_sched(d->dsp_dev); 159 } 160 161 static void 162 getchns(struct dsp_cdevpriv *priv, uint32_t prio) 163 { 164 struct snddev_info *d; 165 struct pcm_channel *ch; 166 uint32_t flags; 167 168 if (priv->simplex) { 169 d = priv->sc; 170 if (!PCM_REGISTERED(d)) 171 return; 172 PCM_LOCK(d); 173 PCM_WAIT(d); 174 PCM_ACQUIRE(d); 175 /* 176 * Note: order is important - 177 * pcm flags -> prio query flags -> wild guess 178 */ 179 ch = NULL; 180 flags = dsp_get_flags(d->dsp_dev); 181 if (flags & SD_F_PRIO_WR) { 182 ch = priv->rdch; 183 } else if (flags & SD_F_PRIO_RD) { 184 ch = priv->wrch; 185 } else if (prio & SD_F_PRIO_WR) { 186 ch = priv->rdch; 187 flags |= SD_F_PRIO_WR; 188 } else if (prio & SD_F_PRIO_RD) { 189 ch = priv->wrch; 190 flags |= SD_F_PRIO_RD; 191 } else if (priv->wrch != NULL) { 192 ch = priv->rdch; 193 flags |= SD_F_PRIO_WR; 194 } else if (priv->rdch != NULL) { 195 ch = priv->wrch; 196 flags |= SD_F_PRIO_RD; 197 } 198 dsp_set_flags(d->dsp_dev, flags); 199 if (ch != NULL) { 200 CHN_LOCK(ch); 201 pcm_chnref(ch, -1); 202 pcm_chnrelease(ch); 203 } 204 PCM_RELEASE(d); 205 PCM_UNLOCK(d); 206 } 207 208 if (priv->rdch != NULL && (prio & SD_F_PRIO_RD)) 209 CHN_LOCK(priv->rdch); 210 if (priv->wrch != NULL && (prio & SD_F_PRIO_WR)) 211 CHN_LOCK(priv->wrch); 212 } 213 214 static void 215 relchns(struct dsp_cdevpriv *priv, uint32_t prio) 216 { 217 if (priv->rdch != NULL && (prio & SD_F_PRIO_RD)) 218 CHN_UNLOCK(priv->rdch); 219 if (priv->wrch != NULL && (prio & SD_F_PRIO_WR)) 220 CHN_UNLOCK(priv->wrch); 221 } 222 223 /* duplex / simplex cdev type */ 224 enum { 225 DSP_CDEV_TYPE_RDONLY, /* simplex read-only (record) */ 226 DSP_CDEV_TYPE_WRONLY, /* simplex write-only (play) */ 227 DSP_CDEV_TYPE_RDWR /* duplex read, write, or both */ 228 }; 229 230 #define DSP_F_VALID(x) ((x) & (FREAD | FWRITE)) 231 #define DSP_F_DUPLEX(x) (((x) & (FREAD | FWRITE)) == (FREAD | FWRITE)) 232 #define DSP_F_SIMPLEX(x) (!DSP_F_DUPLEX(x)) 233 #define DSP_F_READ(x) ((x) & FREAD) 234 #define DSP_F_WRITE(x) ((x) & FWRITE) 235 236 static const struct { 237 int type; 238 char *name; 239 char *sep; 240 char *alias; 241 int use_sep; 242 int hw; 243 int max; 244 int volctl; 245 uint32_t fmt, spd; 246 int query; 247 } dsp_cdevs[] = { 248 { SND_DEV_DSP, "dsp", ".", NULL, 0, 0, 0, 0, 249 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED, 250 DSP_CDEV_TYPE_RDWR }, 251 { SND_DEV_AUDIO, "audio", ".", NULL, 0, 0, 0, 0, 252 SND_FORMAT(AFMT_MU_LAW, 1, 0), DSP_DEFAULT_SPEED, 253 DSP_CDEV_TYPE_RDWR }, 254 { SND_DEV_DSP16, "dspW", ".", NULL, 0, 0, 0, 0, 255 SND_FORMAT(AFMT_S16_LE, 1, 0), DSP_DEFAULT_SPEED, 256 DSP_CDEV_TYPE_RDWR }, 257 { SND_DEV_DSPHW_PLAY, "dsp", ".p", NULL, 1, 1, SND_MAXHWCHAN, 1, 258 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_WRONLY }, 259 { SND_DEV_DSPHW_VPLAY, "dsp", ".vp", NULL, 1, 1, SND_MAXVCHANS, 1, 260 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_WRONLY }, 261 { SND_DEV_DSPHW_REC, "dsp", ".r", NULL, 1, 1, SND_MAXHWCHAN, 1, 262 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_RDONLY }, 263 { SND_DEV_DSPHW_VREC, "dsp", ".vr", NULL, 1, 1, SND_MAXVCHANS, 1, 264 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_RDONLY }, 265 { SND_DEV_DSPHW_CD, "dspcd", ".", NULL, 0, 0, 0, 0, 266 SND_FORMAT(AFMT_S16_LE, 2, 0), 44100, DSP_CDEV_TYPE_RDWR }, 267 /* Low priority, OSSv4 aliases. */ 268 { SND_DEV_DSP, "dsp_ac3", ".", "dsp", 0, 0, 0, 0, 269 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED, 270 DSP_CDEV_TYPE_RDWR }, 271 { SND_DEV_DSP, "dsp_mmap", ".", "dsp", 0, 0, 0, 0, 272 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED, 273 DSP_CDEV_TYPE_RDWR }, 274 { SND_DEV_DSP, "dsp_multich", ".", "dsp", 0, 0, 0, 0, 275 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED, 276 DSP_CDEV_TYPE_RDWR }, 277 { SND_DEV_DSP, "dsp_spdifout", ".", "dsp", 0, 0, 0, 0, 278 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED, 279 DSP_CDEV_TYPE_RDWR }, 280 { SND_DEV_DSP, "dsp_spdifin", ".", "dsp", 0, 0, 0, 0, 281 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED, 282 DSP_CDEV_TYPE_RDWR }, 283 }; 284 285 static void 286 dsp_close(void *data) 287 { 288 struct dsp_cdevpriv *priv = data; 289 struct pcm_channel *rdch, *wrch, *volch; 290 struct snddev_info *d; 291 int sg_ids, rdref, wdref; 292 293 if (priv == NULL) 294 return; 295 296 d = priv->sc; 297 /* At this point pcm_unregister() will destroy all channels anyway. */ 298 if (PCM_DETACHING(d)) 299 goto skip; 300 301 PCM_GIANT_ENTER(d); 302 303 PCM_LOCK(d); 304 PCM_WAIT(d); 305 PCM_ACQUIRE(d); 306 307 rdch = priv->rdch; 308 wrch = priv->wrch; 309 volch = priv->volch; 310 311 rdref = -1; 312 wdref = -1; 313 314 if (volch != NULL) { 315 if (volch == rdch) 316 rdref--; 317 else if (volch == wrch) 318 wdref--; 319 else { 320 CHN_LOCK(volch); 321 pcm_chnref(volch, -1); 322 CHN_UNLOCK(volch); 323 } 324 } 325 326 if (rdch != NULL) 327 CHN_REMOVE(d, rdch, channels.pcm.opened); 328 if (wrch != NULL) 329 CHN_REMOVE(d, wrch, channels.pcm.opened); 330 331 if (rdch != NULL || wrch != NULL) { 332 PCM_UNLOCK(d); 333 if (rdch != NULL) { 334 /* 335 * The channel itself need not be locked because: 336 * a) Adding a channel to a syncgroup happens only 337 * in dsp_ioctl(), which cannot run concurrently 338 * to dsp_close(). 339 * b) The syncmember pointer (sm) is protected by 340 * the global syncgroup list lock. 341 * c) A channel can't just disappear, invalidating 342 * pointers, unless it's closed/dereferenced 343 * first. 344 */ 345 PCM_SG_LOCK(); 346 sg_ids = chn_syncdestroy(rdch); 347 PCM_SG_UNLOCK(); 348 if (sg_ids != 0) 349 free_unr(pcmsg_unrhdr, sg_ids); 350 351 CHN_LOCK(rdch); 352 pcm_chnref(rdch, rdref); 353 chn_abort(rdch); /* won't sleep */ 354 rdch->flags &= ~(CHN_F_RUNNING | CHN_F_MMAP | 355 CHN_F_DEAD | CHN_F_EXCLUSIVE); 356 chn_reset(rdch, 0, 0); 357 pcm_chnrelease(rdch); 358 } 359 if (wrch != NULL) { 360 /* 361 * Please see block above. 362 */ 363 PCM_SG_LOCK(); 364 sg_ids = chn_syncdestroy(wrch); 365 PCM_SG_UNLOCK(); 366 if (sg_ids != 0) 367 free_unr(pcmsg_unrhdr, sg_ids); 368 369 CHN_LOCK(wrch); 370 pcm_chnref(wrch, wdref); 371 chn_flush(wrch); /* may sleep */ 372 wrch->flags &= ~(CHN_F_RUNNING | CHN_F_MMAP | 373 CHN_F_DEAD | CHN_F_EXCLUSIVE); 374 chn_reset(wrch, 0, 0); 375 pcm_chnrelease(wrch); 376 } 377 PCM_LOCK(d); 378 } 379 380 PCM_RELEASE(d); 381 PCM_UNLOCK(d); 382 383 PCM_GIANT_LEAVE(d); 384 skip: 385 free(priv, M_DEVBUF); 386 priv = NULL; 387 } 388 389 #define DSP_FIXUP_ERROR() do { \ 390 prio = dsp_get_flags(i_dev); \ 391 if (!DSP_F_VALID(flags)) \ 392 error = EINVAL; \ 393 if (!DSP_F_DUPLEX(flags) && \ 394 ((DSP_F_READ(flags) && d->reccount == 0) || \ 395 (DSP_F_WRITE(flags) && d->playcount == 0))) \ 396 error = ENOTSUP; \ 397 else if (!DSP_F_DUPLEX(flags) && (prio & SD_F_SIMPLEX) && \ 398 ((DSP_F_READ(flags) && (prio & SD_F_PRIO_WR)) || \ 399 (DSP_F_WRITE(flags) && (prio & SD_F_PRIO_RD)))) \ 400 error = EBUSY; \ 401 } while (0) 402 403 static int 404 dsp_open(struct cdev *i_dev, int flags, int mode, struct thread *td) 405 { 406 struct dsp_cdevpriv *priv; 407 struct pcm_channel *rdch, *wrch; 408 struct snddev_info *d; 409 uint32_t fmt, spd, prio; 410 int error, rderror, wrerror; 411 412 /* Kind of impossible.. */ 413 if (i_dev == NULL || td == NULL) 414 return (ENODEV); 415 416 d = i_dev->si_drv1; 417 if (PCM_DETACHING(d) || !PCM_REGISTERED(d)) 418 return (EBADF); 419 420 priv = malloc(sizeof(*priv), M_DEVBUF, M_WAITOK | M_ZERO); 421 priv->sc = d; 422 priv->rdch = NULL; 423 priv->wrch = NULL; 424 priv->volch = NULL; 425 priv->simplex = (dsp_get_flags(i_dev) & SD_F_SIMPLEX) ? 1 : 0; 426 427 error = devfs_set_cdevpriv(priv, dsp_close); 428 if (error != 0) 429 return (error); 430 431 PCM_GIANT_ENTER(d); 432 433 /* Lock snddev so nobody else can monkey with it. */ 434 PCM_LOCK(d); 435 PCM_WAIT(d); 436 437 error = 0; 438 DSP_FIXUP_ERROR(); 439 if (error != 0) { 440 PCM_UNLOCK(d); 441 PCM_GIANT_EXIT(d); 442 return (error); 443 } 444 445 /* 446 * That is just enough. Acquire and unlock pcm lock so 447 * the other will just have to wait until we finish doing 448 * everything. 449 */ 450 PCM_ACQUIRE(d); 451 PCM_UNLOCK(d); 452 453 fmt = SND_FORMAT(AFMT_U8, 1, 0); 454 spd = DSP_DEFAULT_SPEED; 455 456 rdch = NULL; 457 wrch = NULL; 458 rderror = 0; 459 wrerror = 0; 460 461 if (DSP_F_READ(flags)) { 462 /* open for read */ 463 rderror = pcm_chnalloc(d, &rdch, PCMDIR_REC, 464 td->td_proc->p_pid, td->td_proc->p_comm, -1); 465 466 if (rderror == 0 && chn_reset(rdch, fmt, spd) != 0) 467 rderror = ENXIO; 468 469 if (rderror != 0) { 470 if (rdch != NULL) 471 pcm_chnrelease(rdch); 472 if (!DSP_F_DUPLEX(flags)) { 473 PCM_RELEASE_QUICK(d); 474 PCM_GIANT_EXIT(d); 475 return (rderror); 476 } 477 rdch = NULL; 478 } else { 479 if (flags & O_NONBLOCK) 480 rdch->flags |= CHN_F_NBIO; 481 if (flags & O_EXCL) 482 rdch->flags |= CHN_F_EXCLUSIVE; 483 pcm_chnref(rdch, 1); 484 chn_vpc_reset(rdch, SND_VOL_C_PCM, 0); 485 CHN_UNLOCK(rdch); 486 } 487 } 488 489 if (DSP_F_WRITE(flags)) { 490 /* open for write */ 491 wrerror = pcm_chnalloc(d, &wrch, PCMDIR_PLAY, 492 td->td_proc->p_pid, td->td_proc->p_comm, -1); 493 494 if (wrerror == 0 && chn_reset(wrch, fmt, spd) != 0) 495 wrerror = ENXIO; 496 497 if (wrerror != 0) { 498 if (wrch != NULL) 499 pcm_chnrelease(wrch); 500 if (!DSP_F_DUPLEX(flags)) { 501 if (rdch != NULL) { 502 /* 503 * Lock, deref and release previously 504 * created record channel 505 */ 506 CHN_LOCK(rdch); 507 pcm_chnref(rdch, -1); 508 pcm_chnrelease(rdch); 509 } 510 PCM_RELEASE_QUICK(d); 511 PCM_GIANT_EXIT(d); 512 return (wrerror); 513 } 514 wrch = NULL; 515 } else { 516 if (flags & O_NONBLOCK) 517 wrch->flags |= CHN_F_NBIO; 518 if (flags & O_EXCL) 519 wrch->flags |= CHN_F_EXCLUSIVE; 520 pcm_chnref(wrch, 1); 521 chn_vpc_reset(wrch, SND_VOL_C_PCM, 0); 522 CHN_UNLOCK(wrch); 523 } 524 } 525 526 PCM_LOCK(d); 527 528 if (wrch == NULL && rdch == NULL) { 529 PCM_RELEASE(d); 530 PCM_UNLOCK(d); 531 PCM_GIANT_EXIT(d); 532 if (wrerror != 0) 533 return (wrerror); 534 if (rderror != 0) 535 return (rderror); 536 return (EINVAL); 537 } 538 if (rdch != NULL) 539 CHN_INSERT_HEAD(d, rdch, channels.pcm.opened); 540 if (wrch != NULL) 541 CHN_INSERT_HEAD(d, wrch, channels.pcm.opened); 542 priv->rdch = rdch; 543 priv->wrch = wrch; 544 545 PCM_RELEASE(d); 546 PCM_UNLOCK(d); 547 548 PCM_GIANT_LEAVE(d); 549 550 return (0); 551 } 552 553 static __inline int 554 dsp_io_ops(struct dsp_cdevpriv *priv, struct uio *buf) 555 { 556 struct snddev_info *d; 557 struct pcm_channel **ch; 558 int (*chn_io)(struct pcm_channel *, struct uio *); 559 int prio, ret; 560 pid_t runpid; 561 562 KASSERT(buf != NULL && 563 (buf->uio_rw == UIO_READ || buf->uio_rw == UIO_WRITE), 564 ("%s(): io train wreck!", __func__)); 565 566 d = priv->sc; 567 if (PCM_DETACHING(d) || !DSP_REGISTERED(d)) 568 return (EBADF); 569 570 PCM_GIANT_ENTER(d); 571 572 switch (buf->uio_rw) { 573 case UIO_READ: 574 prio = SD_F_PRIO_RD; 575 ch = &priv->rdch; 576 chn_io = chn_read; 577 break; 578 case UIO_WRITE: 579 prio = SD_F_PRIO_WR; 580 ch = &priv->wrch; 581 chn_io = chn_write; 582 break; 583 default: 584 panic("invalid/corrupted uio direction: %d", buf->uio_rw); 585 break; 586 } 587 588 runpid = buf->uio_td->td_proc->p_pid; 589 590 getchns(priv, prio); 591 592 if (*ch == NULL || !((*ch)->flags & CHN_F_BUSY)) { 593 if (priv->rdch != NULL || priv->wrch != NULL) 594 relchns(priv, prio); 595 PCM_GIANT_EXIT(d); 596 return (EBADF); 597 } 598 599 if (((*ch)->flags & (CHN_F_MMAP | CHN_F_DEAD)) || 600 (((*ch)->flags & CHN_F_RUNNING) && (*ch)->pid != runpid)) { 601 relchns(priv, prio); 602 PCM_GIANT_EXIT(d); 603 return (EINVAL); 604 } else if (!((*ch)->flags & CHN_F_RUNNING)) { 605 (*ch)->flags |= CHN_F_RUNNING; 606 (*ch)->pid = runpid; 607 } 608 609 /* 610 * chn_read/write must give up channel lock in order to copy bytes 611 * from/to userland, so up the "in progress" counter to make sure 612 * someone else doesn't come along and muss up the buffer. 613 */ 614 ++(*ch)->inprog; 615 ret = chn_io(*ch, buf); 616 --(*ch)->inprog; 617 618 CHN_BROADCAST(&(*ch)->cv); 619 620 relchns(priv, prio); 621 622 PCM_GIANT_LEAVE(d); 623 624 return (ret); 625 } 626 627 static int 628 dsp_read(struct cdev *i_dev, struct uio *buf, int flag) 629 { 630 struct dsp_cdevpriv *priv; 631 int err; 632 633 if ((err = devfs_get_cdevpriv((void **)&priv)) != 0) 634 return (err); 635 return (dsp_io_ops(priv, buf)); 636 } 637 638 static int 639 dsp_write(struct cdev *i_dev, struct uio *buf, int flag) 640 { 641 struct dsp_cdevpriv *priv; 642 int err; 643 644 if ((err = devfs_get_cdevpriv((void **)&priv)) != 0) 645 return (err); 646 return (dsp_io_ops(priv, buf)); 647 } 648 649 static int 650 dsp_get_volume_channel(struct dsp_cdevpriv *priv, struct pcm_channel **volch) 651 { 652 struct snddev_info *d; 653 struct pcm_channel *c; 654 int unit; 655 656 KASSERT(volch != NULL, 657 ("%s(): NULL query priv=%p volch=%p", __func__, priv, volch)); 658 659 d = priv->sc; 660 if (!PCM_REGISTERED(d)) { 661 *volch = NULL; 662 return (EINVAL); 663 } 664 665 PCM_UNLOCKASSERT(d); 666 667 *volch = NULL; 668 669 c = priv->volch; 670 if (c != NULL) { 671 if (!(c->feederflags & (1 << FEEDER_VOLUME))) 672 return (-1); 673 *volch = c; 674 return (0); 675 } 676 677 PCM_LOCK(d); 678 PCM_WAIT(d); 679 PCM_ACQUIRE(d); 680 681 unit = dev2unit(d->dsp_dev); 682 683 CHN_FOREACH(c, d, channels.pcm) { 684 CHN_LOCK(c); 685 if (c->unit != unit) { 686 CHN_UNLOCK(c); 687 continue; 688 } 689 *volch = c; 690 pcm_chnref(c, 1); 691 priv->volch = c; 692 CHN_UNLOCK(c); 693 PCM_RELEASE(d); 694 PCM_UNLOCK(d); 695 return ((c->feederflags & (1 << FEEDER_VOLUME)) ? 0 : -1); 696 } 697 698 PCM_RELEASE(d); 699 PCM_UNLOCK(d); 700 701 return (EINVAL); 702 } 703 704 static int 705 dsp_ioctl_channel(struct dsp_cdevpriv *priv, struct pcm_channel *volch, 706 u_long cmd, caddr_t arg) 707 { 708 struct snddev_info *d; 709 struct pcm_channel *rdch, *wrch; 710 int j, devtype, ret; 711 int left, right, center, mute; 712 713 d = priv->sc; 714 if (!PCM_REGISTERED(d) || !(dsp_get_flags(d->dsp_dev) & SD_F_VPC)) 715 return (-1); 716 717 PCM_UNLOCKASSERT(d); 718 719 j = cmd & 0xff; 720 721 rdch = priv->rdch; 722 wrch = priv->wrch; 723 724 /* No specific channel, look into cache */ 725 if (volch == NULL) 726 volch = priv->volch; 727 728 /* Look harder */ 729 if (volch == NULL) { 730 if (j == SOUND_MIXER_RECLEV && rdch != NULL) 731 volch = rdch; 732 else if (j == SOUND_MIXER_PCM && wrch != NULL) 733 volch = wrch; 734 } 735 736 devtype = PCMDEV(d->dsp_dev); 737 738 /* Look super harder */ 739 if (volch == NULL && 740 (devtype == SND_DEV_DSPHW_PLAY || devtype == SND_DEV_DSPHW_VPLAY || 741 devtype == SND_DEV_DSPHW_REC || devtype == SND_DEV_DSPHW_VREC)) { 742 ret = dsp_get_volume_channel(priv, &volch); 743 if (ret != 0) 744 return (ret); 745 if (volch == NULL) 746 return (EINVAL); 747 } 748 749 /* Final validation */ 750 if (volch == NULL) 751 return (EINVAL); 752 753 CHN_LOCK(volch); 754 if (!(volch->feederflags & (1 << FEEDER_VOLUME))) { 755 CHN_UNLOCK(volch); 756 return (EINVAL); 757 } 758 759 switch (cmd & ~0xff) { 760 case MIXER_WRITE(0): 761 switch (j) { 762 case SOUND_MIXER_MUTE: 763 if (volch->direction == PCMDIR_REC) { 764 chn_setmute_multi(volch, SND_VOL_C_PCM, (*(int *)arg & SOUND_MASK_RECLEV) != 0); 765 } else { 766 chn_setmute_multi(volch, SND_VOL_C_PCM, (*(int *)arg & SOUND_MASK_PCM) != 0); 767 } 768 break; 769 case SOUND_MIXER_PCM: 770 if (volch->direction != PCMDIR_PLAY) 771 break; 772 left = *(int *)arg & 0x7f; 773 right = ((*(int *)arg) >> 8) & 0x7f; 774 center = (left + right) >> 1; 775 chn_setvolume_multi(volch, SND_VOL_C_PCM, 776 left, right, center); 777 break; 778 case SOUND_MIXER_RECLEV: 779 if (volch->direction != PCMDIR_REC) 780 break; 781 left = *(int *)arg & 0x7f; 782 right = ((*(int *)arg) >> 8) & 0x7f; 783 center = (left + right) >> 1; 784 chn_setvolume_multi(volch, SND_VOL_C_PCM, 785 left, right, center); 786 break; 787 default: 788 /* ignore all other mixer writes */ 789 break; 790 } 791 break; 792 793 case MIXER_READ(0): 794 switch (j) { 795 case SOUND_MIXER_MUTE: 796 mute = CHN_GETMUTE(volch, SND_VOL_C_PCM, SND_CHN_T_FL) || 797 CHN_GETMUTE(volch, SND_VOL_C_PCM, SND_CHN_T_FR); 798 if (volch->direction == PCMDIR_REC) { 799 *(int *)arg = mute << SOUND_MIXER_RECLEV; 800 } else { 801 *(int *)arg = mute << SOUND_MIXER_PCM; 802 } 803 break; 804 case SOUND_MIXER_PCM: 805 if (volch->direction != PCMDIR_PLAY) 806 break; 807 *(int *)arg = CHN_GETVOLUME(volch, 808 SND_VOL_C_PCM, SND_CHN_T_FL); 809 *(int *)arg |= CHN_GETVOLUME(volch, 810 SND_VOL_C_PCM, SND_CHN_T_FR) << 8; 811 break; 812 case SOUND_MIXER_RECLEV: 813 if (volch->direction != PCMDIR_REC) 814 break; 815 *(int *)arg = CHN_GETVOLUME(volch, 816 SND_VOL_C_PCM, SND_CHN_T_FL); 817 *(int *)arg |= CHN_GETVOLUME(volch, 818 SND_VOL_C_PCM, SND_CHN_T_FR) << 8; 819 break; 820 case SOUND_MIXER_DEVMASK: 821 case SOUND_MIXER_CAPS: 822 case SOUND_MIXER_STEREODEVS: 823 if (volch->direction == PCMDIR_REC) 824 *(int *)arg = SOUND_MASK_RECLEV; 825 else 826 *(int *)arg = SOUND_MASK_PCM; 827 break; 828 default: 829 *(int *)arg = 0; 830 break; 831 } 832 break; 833 834 default: 835 break; 836 } 837 CHN_UNLOCK(volch); 838 return (0); 839 } 840 841 static int 842 dsp_ioctl(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode, 843 struct thread *td) 844 { 845 struct dsp_cdevpriv *priv; 846 struct pcm_channel *chn, *rdch, *wrch; 847 struct snddev_info *d; 848 u_long xcmd; 849 int *arg_i, ret, tmp, err; 850 851 if ((err = devfs_get_cdevpriv((void **)&priv)) != 0) 852 return (err); 853 854 d = priv->sc; 855 if (PCM_DETACHING(d) || !DSP_REGISTERED(d)) 856 return (EBADF); 857 858 PCM_GIANT_ENTER(d); 859 860 arg_i = (int *)arg; 861 ret = 0; 862 xcmd = 0; 863 chn = NULL; 864 865 if (IOCGROUP(cmd) == 'M') { 866 if (cmd == OSS_GETVERSION) { 867 *arg_i = SOUND_VERSION; 868 PCM_GIANT_EXIT(d); 869 return (0); 870 } 871 ret = dsp_ioctl_channel(priv, priv->volch, cmd, arg); 872 if (ret != -1) { 873 PCM_GIANT_EXIT(d); 874 return (ret); 875 } 876 877 if (d->mixer_dev != NULL) { 878 PCM_ACQUIRE_QUICK(d); 879 ret = mixer_ioctl_cmd(d->mixer_dev, cmd, arg, -1, td, 880 MIXER_CMD_DIRECT); 881 PCM_RELEASE_QUICK(d); 882 } else 883 ret = EBADF; 884 885 PCM_GIANT_EXIT(d); 886 887 return (ret); 888 } 889 890 /* 891 * Certain ioctls may be made on any type of device (audio, mixer, 892 * and MIDI). Handle those special cases here. 893 */ 894 if (IOCGROUP(cmd) == 'X') { 895 PCM_ACQUIRE_QUICK(d); 896 switch(cmd) { 897 case SNDCTL_SYSINFO: 898 sound_oss_sysinfo((oss_sysinfo *)arg); 899 break; 900 case SNDCTL_CARDINFO: 901 ret = sound_oss_card_info((oss_card_info *)arg); 902 break; 903 case SNDCTL_AUDIOINFO: 904 case SNDCTL_AUDIOINFO_EX: 905 case SNDCTL_ENGINEINFO: 906 ret = dsp_oss_audioinfo(i_dev, (oss_audioinfo *)arg); 907 break; 908 case SNDCTL_MIXERINFO: 909 ret = mixer_oss_mixerinfo(i_dev, (oss_mixerinfo *)arg); 910 break; 911 default: 912 ret = EINVAL; 913 } 914 PCM_RELEASE_QUICK(d); 915 PCM_GIANT_EXIT(d); 916 return (ret); 917 } 918 919 getchns(priv, 0); 920 rdch = priv->rdch; 921 wrch = priv->wrch; 922 923 if (wrch != NULL && (wrch->flags & CHN_F_DEAD)) 924 wrch = NULL; 925 if (rdch != NULL && (rdch->flags & CHN_F_DEAD)) 926 rdch = NULL; 927 928 if (wrch == NULL && rdch == NULL) { 929 PCM_GIANT_EXIT(d); 930 return (EINVAL); 931 } 932 933 switch(cmd) { 934 #ifdef OLDPCM_IOCTL 935 /* 936 * we start with the new ioctl interface. 937 */ 938 case AIONWRITE: /* how many bytes can write ? */ 939 if (wrch) { 940 CHN_LOCK(wrch); 941 /* 942 if (wrch && wrch->bufhard.dl) 943 while (chn_wrfeed(wrch) == 0); 944 */ 945 *arg_i = sndbuf_getfree(wrch->bufsoft); 946 CHN_UNLOCK(wrch); 947 } else { 948 *arg_i = 0; 949 ret = EINVAL; 950 } 951 break; 952 953 case AIOSSIZE: /* set the current blocksize */ 954 { 955 struct snd_size *p = (struct snd_size *)arg; 956 957 p->play_size = 0; 958 p->rec_size = 0; 959 PCM_ACQUIRE_QUICK(d); 960 if (wrch) { 961 CHN_LOCK(wrch); 962 chn_setblocksize(wrch, 2, p->play_size); 963 p->play_size = sndbuf_getblksz(wrch->bufsoft); 964 CHN_UNLOCK(wrch); 965 } 966 if (rdch) { 967 CHN_LOCK(rdch); 968 chn_setblocksize(rdch, 2, p->rec_size); 969 p->rec_size = sndbuf_getblksz(rdch->bufsoft); 970 CHN_UNLOCK(rdch); 971 } 972 PCM_RELEASE_QUICK(d); 973 } 974 break; 975 case AIOGSIZE: /* get the current blocksize */ 976 { 977 struct snd_size *p = (struct snd_size *)arg; 978 979 if (wrch) { 980 CHN_LOCK(wrch); 981 p->play_size = sndbuf_getblksz(wrch->bufsoft); 982 CHN_UNLOCK(wrch); 983 } 984 if (rdch) { 985 CHN_LOCK(rdch); 986 p->rec_size = sndbuf_getblksz(rdch->bufsoft); 987 CHN_UNLOCK(rdch); 988 } 989 } 990 break; 991 992 case AIOSFMT: 993 case AIOGFMT: 994 { 995 snd_chan_param *p = (snd_chan_param *)arg; 996 997 if (cmd == AIOSFMT && 998 ((p->play_format != 0 && p->play_rate == 0) || 999 (p->rec_format != 0 && p->rec_rate == 0))) { 1000 ret = EINVAL; 1001 break; 1002 } 1003 PCM_ACQUIRE_QUICK(d); 1004 if (wrch) { 1005 CHN_LOCK(wrch); 1006 if (cmd == AIOSFMT && p->play_format != 0) { 1007 chn_setformat(wrch, 1008 SND_FORMAT(p->play_format, 1009 AFMT_CHANNEL(wrch->format), 1010 AFMT_EXTCHANNEL(wrch->format))); 1011 chn_setspeed(wrch, p->play_rate); 1012 } 1013 p->play_rate = wrch->speed; 1014 p->play_format = AFMT_ENCODING(wrch->format); 1015 CHN_UNLOCK(wrch); 1016 } else { 1017 p->play_rate = 0; 1018 p->play_format = 0; 1019 } 1020 if (rdch) { 1021 CHN_LOCK(rdch); 1022 if (cmd == AIOSFMT && p->rec_format != 0) { 1023 chn_setformat(rdch, 1024 SND_FORMAT(p->rec_format, 1025 AFMT_CHANNEL(rdch->format), 1026 AFMT_EXTCHANNEL(rdch->format))); 1027 chn_setspeed(rdch, p->rec_rate); 1028 } 1029 p->rec_rate = rdch->speed; 1030 p->rec_format = AFMT_ENCODING(rdch->format); 1031 CHN_UNLOCK(rdch); 1032 } else { 1033 p->rec_rate = 0; 1034 p->rec_format = 0; 1035 } 1036 PCM_RELEASE_QUICK(d); 1037 } 1038 break; 1039 1040 case AIOGCAP: /* get capabilities */ 1041 { 1042 snd_capabilities *p = (snd_capabilities *)arg; 1043 struct pcmchan_caps *pcaps = NULL, *rcaps = NULL; 1044 struct cdev *pdev; 1045 1046 PCM_LOCK(d); 1047 if (rdch) { 1048 CHN_LOCK(rdch); 1049 rcaps = chn_getcaps(rdch); 1050 } 1051 if (wrch) { 1052 CHN_LOCK(wrch); 1053 pcaps = chn_getcaps(wrch); 1054 } 1055 p->rate_min = max(rcaps? rcaps->minspeed : 0, 1056 pcaps? pcaps->minspeed : 0); 1057 p->rate_max = min(rcaps? rcaps->maxspeed : 1000000, 1058 pcaps? pcaps->maxspeed : 1000000); 1059 p->bufsize = min(rdch? sndbuf_getsize(rdch->bufsoft) : 1000000, 1060 wrch? sndbuf_getsize(wrch->bufsoft) : 1000000); 1061 /* XXX bad on sb16 */ 1062 p->formats = (rdch? chn_getformats(rdch) : 0xffffffff) & 1063 (wrch? chn_getformats(wrch) : 0xffffffff); 1064 if (rdch && wrch) 1065 p->formats |= (dsp_get_flags(i_dev) & SD_F_SIMPLEX)? 0 : AFMT_FULLDUPLEX; 1066 pdev = d->mixer_dev; 1067 p->mixers = 1; /* default: one mixer */ 1068 p->inputs = pdev->si_drv1? mix_getdevs(pdev->si_drv1) : 0; 1069 p->left = p->right = 100; 1070 if (wrch) 1071 CHN_UNLOCK(wrch); 1072 if (rdch) 1073 CHN_UNLOCK(rdch); 1074 PCM_UNLOCK(d); 1075 } 1076 break; 1077 1078 case AIOSTOP: 1079 if (*arg_i == AIOSYNC_PLAY && wrch) { 1080 CHN_LOCK(wrch); 1081 *arg_i = chn_abort(wrch); 1082 CHN_UNLOCK(wrch); 1083 } else if (*arg_i == AIOSYNC_CAPTURE && rdch) { 1084 CHN_LOCK(rdch); 1085 *arg_i = chn_abort(rdch); 1086 CHN_UNLOCK(rdch); 1087 } else { 1088 printf("AIOSTOP: bad channel 0x%x\n", *arg_i); 1089 *arg_i = 0; 1090 } 1091 break; 1092 1093 case AIOSYNC: 1094 printf("AIOSYNC chan 0x%03lx pos %lu unimplemented\n", 1095 ((snd_sync_parm *)arg)->chan, ((snd_sync_parm *)arg)->pos); 1096 break; 1097 #endif 1098 /* 1099 * here follow the standard ioctls (filio.h etc.) 1100 */ 1101 case FIONREAD: /* get # bytes to read */ 1102 if (rdch) { 1103 CHN_LOCK(rdch); 1104 /* if (rdch && rdch->bufhard.dl) 1105 while (chn_rdfeed(rdch) == 0); 1106 */ 1107 *arg_i = sndbuf_getready(rdch->bufsoft); 1108 CHN_UNLOCK(rdch); 1109 } else { 1110 *arg_i = 0; 1111 ret = EINVAL; 1112 } 1113 break; 1114 1115 case FIOASYNC: /*set/clear async i/o */ 1116 DEB( printf("FIOASYNC\n") ; ) 1117 break; 1118 1119 case SNDCTL_DSP_NONBLOCK: /* set non-blocking i/o */ 1120 case FIONBIO: /* set/clear non-blocking i/o */ 1121 if (rdch) { 1122 CHN_LOCK(rdch); 1123 if (cmd == SNDCTL_DSP_NONBLOCK || *arg_i) 1124 rdch->flags |= CHN_F_NBIO; 1125 else 1126 rdch->flags &= ~CHN_F_NBIO; 1127 CHN_UNLOCK(rdch); 1128 } 1129 if (wrch) { 1130 CHN_LOCK(wrch); 1131 if (cmd == SNDCTL_DSP_NONBLOCK || *arg_i) 1132 wrch->flags |= CHN_F_NBIO; 1133 else 1134 wrch->flags &= ~CHN_F_NBIO; 1135 CHN_UNLOCK(wrch); 1136 } 1137 break; 1138 1139 /* 1140 * Finally, here is the linux-compatible ioctl interface 1141 */ 1142 #define THE_REAL_SNDCTL_DSP_GETBLKSIZE _IOWR('P', 4, int) 1143 case THE_REAL_SNDCTL_DSP_GETBLKSIZE: 1144 case SNDCTL_DSP_GETBLKSIZE: 1145 chn = wrch ? wrch : rdch; 1146 if (chn) { 1147 CHN_LOCK(chn); 1148 *arg_i = sndbuf_getblksz(chn->bufsoft); 1149 CHN_UNLOCK(chn); 1150 } else { 1151 *arg_i = 0; 1152 ret = EINVAL; 1153 } 1154 break; 1155 1156 case SNDCTL_DSP_SETBLKSIZE: 1157 RANGE(*arg_i, 16, 65536); 1158 PCM_ACQUIRE_QUICK(d); 1159 if (wrch) { 1160 CHN_LOCK(wrch); 1161 chn_setblocksize(wrch, 2, *arg_i); 1162 CHN_UNLOCK(wrch); 1163 } 1164 if (rdch) { 1165 CHN_LOCK(rdch); 1166 chn_setblocksize(rdch, 2, *arg_i); 1167 CHN_UNLOCK(rdch); 1168 } 1169 PCM_RELEASE_QUICK(d); 1170 break; 1171 1172 case SNDCTL_DSP_RESET: 1173 DEB(printf("dsp reset\n")); 1174 if (wrch) { 1175 CHN_LOCK(wrch); 1176 chn_abort(wrch); 1177 chn_resetbuf(wrch); 1178 CHN_UNLOCK(wrch); 1179 } 1180 if (rdch) { 1181 CHN_LOCK(rdch); 1182 chn_abort(rdch); 1183 chn_resetbuf(rdch); 1184 CHN_UNLOCK(rdch); 1185 } 1186 break; 1187 1188 case SNDCTL_DSP_SYNC: 1189 DEB(printf("dsp sync\n")); 1190 /* chn_sync may sleep */ 1191 if (wrch) { 1192 CHN_LOCK(wrch); 1193 chn_sync(wrch, 0); 1194 CHN_UNLOCK(wrch); 1195 } 1196 break; 1197 1198 case SNDCTL_DSP_SPEED: 1199 /* chn_setspeed may sleep */ 1200 tmp = 0; 1201 PCM_ACQUIRE_QUICK(d); 1202 if (wrch) { 1203 CHN_LOCK(wrch); 1204 ret = chn_setspeed(wrch, *arg_i); 1205 tmp = wrch->speed; 1206 CHN_UNLOCK(wrch); 1207 } 1208 if (rdch && ret == 0) { 1209 CHN_LOCK(rdch); 1210 ret = chn_setspeed(rdch, *arg_i); 1211 if (tmp == 0) 1212 tmp = rdch->speed; 1213 CHN_UNLOCK(rdch); 1214 } 1215 PCM_RELEASE_QUICK(d); 1216 *arg_i = tmp; 1217 break; 1218 1219 case SOUND_PCM_READ_RATE: 1220 chn = wrch ? wrch : rdch; 1221 if (chn) { 1222 CHN_LOCK(chn); 1223 *arg_i = chn->speed; 1224 CHN_UNLOCK(chn); 1225 } else { 1226 *arg_i = 0; 1227 ret = EINVAL; 1228 } 1229 break; 1230 1231 case SNDCTL_DSP_STEREO: 1232 tmp = -1; 1233 *arg_i = (*arg_i)? 2 : 1; 1234 PCM_ACQUIRE_QUICK(d); 1235 if (wrch) { 1236 CHN_LOCK(wrch); 1237 ret = chn_setformat(wrch, 1238 SND_FORMAT(wrch->format, *arg_i, 0)); 1239 tmp = (AFMT_CHANNEL(wrch->format) > 1)? 1 : 0; 1240 CHN_UNLOCK(wrch); 1241 } 1242 if (rdch && ret == 0) { 1243 CHN_LOCK(rdch); 1244 ret = chn_setformat(rdch, 1245 SND_FORMAT(rdch->format, *arg_i, 0)); 1246 if (tmp == -1) 1247 tmp = (AFMT_CHANNEL(rdch->format) > 1)? 1 : 0; 1248 CHN_UNLOCK(rdch); 1249 } 1250 PCM_RELEASE_QUICK(d); 1251 *arg_i = tmp; 1252 break; 1253 1254 case SOUND_PCM_WRITE_CHANNELS: 1255 /* case SNDCTL_DSP_CHANNELS: ( == SOUND_PCM_WRITE_CHANNELS) */ 1256 if (*arg_i < 0 || *arg_i > AFMT_CHANNEL_MAX) { 1257 *arg_i = 0; 1258 ret = EINVAL; 1259 break; 1260 } 1261 if (*arg_i != 0) { 1262 uint32_t ext = 0; 1263 1264 tmp = 0; 1265 /* 1266 * Map channel number to surround sound formats. 1267 * Devices that need bitperfect mode to operate 1268 * (e.g. more than SND_CHN_MAX channels) are not 1269 * subject to any mapping. 1270 */ 1271 if (!(dsp_get_flags(i_dev) & SD_F_BITPERFECT)) { 1272 struct pcmchan_matrix *m; 1273 1274 if (*arg_i > SND_CHN_MAX) 1275 *arg_i = SND_CHN_MAX; 1276 1277 m = feeder_matrix_default_channel_map(*arg_i); 1278 if (m != NULL) 1279 ext = m->ext; 1280 } 1281 1282 PCM_ACQUIRE_QUICK(d); 1283 if (wrch) { 1284 CHN_LOCK(wrch); 1285 ret = chn_setformat(wrch, 1286 SND_FORMAT(wrch->format, *arg_i, ext)); 1287 tmp = AFMT_CHANNEL(wrch->format); 1288 CHN_UNLOCK(wrch); 1289 } 1290 if (rdch && ret == 0) { 1291 CHN_LOCK(rdch); 1292 ret = chn_setformat(rdch, 1293 SND_FORMAT(rdch->format, *arg_i, ext)); 1294 if (tmp == 0) 1295 tmp = AFMT_CHANNEL(rdch->format); 1296 CHN_UNLOCK(rdch); 1297 } 1298 PCM_RELEASE_QUICK(d); 1299 *arg_i = tmp; 1300 } else { 1301 chn = wrch ? wrch : rdch; 1302 CHN_LOCK(chn); 1303 *arg_i = AFMT_CHANNEL(chn->format); 1304 CHN_UNLOCK(chn); 1305 } 1306 break; 1307 1308 case SOUND_PCM_READ_CHANNELS: 1309 chn = wrch ? wrch : rdch; 1310 if (chn) { 1311 CHN_LOCK(chn); 1312 *arg_i = AFMT_CHANNEL(chn->format); 1313 CHN_UNLOCK(chn); 1314 } else { 1315 *arg_i = 0; 1316 ret = EINVAL; 1317 } 1318 break; 1319 1320 case SNDCTL_DSP_GETFMTS: /* returns a mask of supported fmts */ 1321 chn = wrch ? wrch : rdch; 1322 if (chn) { 1323 CHN_LOCK(chn); 1324 *arg_i = chn_getformats(chn); 1325 CHN_UNLOCK(chn); 1326 } else { 1327 *arg_i = 0; 1328 ret = EINVAL; 1329 } 1330 break; 1331 1332 case SNDCTL_DSP_SETFMT: /* sets _one_ format */ 1333 if (*arg_i != AFMT_QUERY) { 1334 tmp = 0; 1335 PCM_ACQUIRE_QUICK(d); 1336 if (wrch) { 1337 CHN_LOCK(wrch); 1338 ret = chn_setformat(wrch, SND_FORMAT(*arg_i, 1339 AFMT_CHANNEL(wrch->format), 1340 AFMT_EXTCHANNEL(wrch->format))); 1341 tmp = wrch->format; 1342 CHN_UNLOCK(wrch); 1343 } 1344 if (rdch && ret == 0) { 1345 CHN_LOCK(rdch); 1346 ret = chn_setformat(rdch, SND_FORMAT(*arg_i, 1347 AFMT_CHANNEL(rdch->format), 1348 AFMT_EXTCHANNEL(rdch->format))); 1349 if (tmp == 0) 1350 tmp = rdch->format; 1351 CHN_UNLOCK(rdch); 1352 } 1353 PCM_RELEASE_QUICK(d); 1354 *arg_i = AFMT_ENCODING(tmp); 1355 } else { 1356 chn = wrch ? wrch : rdch; 1357 CHN_LOCK(chn); 1358 *arg_i = AFMT_ENCODING(chn->format); 1359 CHN_UNLOCK(chn); 1360 } 1361 break; 1362 1363 case SNDCTL_DSP_SETFRAGMENT: 1364 DEB(printf("SNDCTL_DSP_SETFRAGMENT 0x%08x\n", *(int *)arg)); 1365 { 1366 uint32_t fragln = (*arg_i) & 0x0000ffff; 1367 uint32_t maxfrags = ((*arg_i) & 0xffff0000) >> 16; 1368 uint32_t fragsz; 1369 uint32_t r_maxfrags, r_fragsz; 1370 1371 RANGE(fragln, 4, 16); 1372 fragsz = 1 << fragln; 1373 1374 if (maxfrags == 0) 1375 maxfrags = CHN_2NDBUFMAXSIZE / fragsz; 1376 if (maxfrags < 2) 1377 maxfrags = 2; 1378 if (maxfrags * fragsz > CHN_2NDBUFMAXSIZE) 1379 maxfrags = CHN_2NDBUFMAXSIZE / fragsz; 1380 1381 DEB(printf("SNDCTL_DSP_SETFRAGMENT %d frags, %d sz\n", maxfrags, fragsz)); 1382 PCM_ACQUIRE_QUICK(d); 1383 if (rdch) { 1384 CHN_LOCK(rdch); 1385 ret = chn_setblocksize(rdch, maxfrags, fragsz); 1386 r_maxfrags = sndbuf_getblkcnt(rdch->bufsoft); 1387 r_fragsz = sndbuf_getblksz(rdch->bufsoft); 1388 CHN_UNLOCK(rdch); 1389 } else { 1390 r_maxfrags = maxfrags; 1391 r_fragsz = fragsz; 1392 } 1393 if (wrch && ret == 0) { 1394 CHN_LOCK(wrch); 1395 ret = chn_setblocksize(wrch, maxfrags, fragsz); 1396 maxfrags = sndbuf_getblkcnt(wrch->bufsoft); 1397 fragsz = sndbuf_getblksz(wrch->bufsoft); 1398 CHN_UNLOCK(wrch); 1399 } else { /* use whatever came from the read channel */ 1400 maxfrags = r_maxfrags; 1401 fragsz = r_fragsz; 1402 } 1403 PCM_RELEASE_QUICK(d); 1404 1405 fragln = 0; 1406 while (fragsz > 1) { 1407 fragln++; 1408 fragsz >>= 1; 1409 } 1410 *arg_i = (maxfrags << 16) | fragln; 1411 } 1412 break; 1413 1414 case SNDCTL_DSP_GETISPACE: 1415 /* return the size of data available in the input queue */ 1416 { 1417 audio_buf_info *a = (audio_buf_info *)arg; 1418 if (rdch) { 1419 struct snd_dbuf *bs = rdch->bufsoft; 1420 1421 CHN_LOCK(rdch); 1422 a->bytes = sndbuf_getready(bs); 1423 a->fragments = a->bytes / sndbuf_getblksz(bs); 1424 a->fragstotal = sndbuf_getblkcnt(bs); 1425 a->fragsize = sndbuf_getblksz(bs); 1426 CHN_UNLOCK(rdch); 1427 } else 1428 ret = EINVAL; 1429 } 1430 break; 1431 1432 case SNDCTL_DSP_GETOSPACE: 1433 /* return space available in the output queue */ 1434 { 1435 audio_buf_info *a = (audio_buf_info *)arg; 1436 if (wrch) { 1437 struct snd_dbuf *bs = wrch->bufsoft; 1438 1439 CHN_LOCK(wrch); 1440 /* XXX abusive DMA update: chn_wrupdate(wrch); */ 1441 a->bytes = sndbuf_getfree(bs); 1442 a->fragments = a->bytes / sndbuf_getblksz(bs); 1443 a->fragstotal = sndbuf_getblkcnt(bs); 1444 a->fragsize = sndbuf_getblksz(bs); 1445 CHN_UNLOCK(wrch); 1446 } else 1447 ret = EINVAL; 1448 } 1449 break; 1450 1451 case SNDCTL_DSP_GETIPTR: 1452 { 1453 count_info *a = (count_info *)arg; 1454 if (rdch) { 1455 struct snd_dbuf *bs = rdch->bufsoft; 1456 1457 CHN_LOCK(rdch); 1458 /* XXX abusive DMA update: chn_rdupdate(rdch); */ 1459 a->bytes = sndbuf_gettotal(bs); 1460 a->blocks = sndbuf_getblocks(bs) - rdch->blocks; 1461 a->ptr = sndbuf_getfreeptr(bs); 1462 rdch->blocks = sndbuf_getblocks(bs); 1463 CHN_UNLOCK(rdch); 1464 } else 1465 ret = EINVAL; 1466 } 1467 break; 1468 1469 case SNDCTL_DSP_GETOPTR: 1470 { 1471 count_info *a = (count_info *)arg; 1472 if (wrch) { 1473 struct snd_dbuf *bs = wrch->bufsoft; 1474 1475 CHN_LOCK(wrch); 1476 /* XXX abusive DMA update: chn_wrupdate(wrch); */ 1477 a->bytes = sndbuf_gettotal(bs); 1478 a->blocks = sndbuf_getblocks(bs) - wrch->blocks; 1479 a->ptr = sndbuf_getreadyptr(bs); 1480 wrch->blocks = sndbuf_getblocks(bs); 1481 CHN_UNLOCK(wrch); 1482 } else 1483 ret = EINVAL; 1484 } 1485 break; 1486 1487 case SNDCTL_DSP_GETCAPS: 1488 PCM_LOCK(d); 1489 *arg_i = PCM_CAP_REALTIME | PCM_CAP_MMAP | PCM_CAP_TRIGGER; 1490 if (rdch && wrch && !(dsp_get_flags(i_dev) & SD_F_SIMPLEX)) 1491 *arg_i |= PCM_CAP_DUPLEX; 1492 if (rdch && (rdch->flags & CHN_F_VIRTUAL) != 0) 1493 *arg_i |= PCM_CAP_VIRTUAL; 1494 if (wrch && (wrch->flags & CHN_F_VIRTUAL) != 0) 1495 *arg_i |= PCM_CAP_VIRTUAL; 1496 PCM_UNLOCK(d); 1497 break; 1498 1499 case SOUND_PCM_READ_BITS: 1500 chn = wrch ? wrch : rdch; 1501 if (chn) { 1502 CHN_LOCK(chn); 1503 if (chn->format & AFMT_8BIT) 1504 *arg_i = 8; 1505 else if (chn->format & AFMT_16BIT) 1506 *arg_i = 16; 1507 else if (chn->format & AFMT_24BIT) 1508 *arg_i = 24; 1509 else if (chn->format & AFMT_32BIT) 1510 *arg_i = 32; 1511 else 1512 ret = EINVAL; 1513 CHN_UNLOCK(chn); 1514 } else { 1515 *arg_i = 0; 1516 ret = EINVAL; 1517 } 1518 break; 1519 1520 case SNDCTL_DSP_SETTRIGGER: 1521 if (rdch) { 1522 CHN_LOCK(rdch); 1523 rdch->flags &= ~CHN_F_NOTRIGGER; 1524 if (*arg_i & PCM_ENABLE_INPUT) 1525 chn_start(rdch, 1); 1526 else { 1527 chn_abort(rdch); 1528 chn_resetbuf(rdch); 1529 rdch->flags |= CHN_F_NOTRIGGER; 1530 } 1531 CHN_UNLOCK(rdch); 1532 } 1533 if (wrch) { 1534 CHN_LOCK(wrch); 1535 wrch->flags &= ~CHN_F_NOTRIGGER; 1536 if (*arg_i & PCM_ENABLE_OUTPUT) 1537 chn_start(wrch, 1); 1538 else { 1539 chn_abort(wrch); 1540 chn_resetbuf(wrch); 1541 wrch->flags |= CHN_F_NOTRIGGER; 1542 } 1543 CHN_UNLOCK(wrch); 1544 } 1545 break; 1546 1547 case SNDCTL_DSP_GETTRIGGER: 1548 *arg_i = 0; 1549 if (wrch) { 1550 CHN_LOCK(wrch); 1551 if (wrch->flags & CHN_F_TRIGGERED) 1552 *arg_i |= PCM_ENABLE_OUTPUT; 1553 CHN_UNLOCK(wrch); 1554 } 1555 if (rdch) { 1556 CHN_LOCK(rdch); 1557 if (rdch->flags & CHN_F_TRIGGERED) 1558 *arg_i |= PCM_ENABLE_INPUT; 1559 CHN_UNLOCK(rdch); 1560 } 1561 break; 1562 1563 case SNDCTL_DSP_GETODELAY: 1564 if (wrch) { 1565 struct snd_dbuf *bs = wrch->bufsoft; 1566 1567 CHN_LOCK(wrch); 1568 /* XXX abusive DMA update: chn_wrupdate(wrch); */ 1569 *arg_i = sndbuf_getready(bs); 1570 CHN_UNLOCK(wrch); 1571 } else 1572 ret = EINVAL; 1573 break; 1574 1575 case SNDCTL_DSP_POST: 1576 if (wrch) { 1577 CHN_LOCK(wrch); 1578 wrch->flags &= ~CHN_F_NOTRIGGER; 1579 chn_start(wrch, 1); 1580 CHN_UNLOCK(wrch); 1581 } 1582 break; 1583 1584 case SNDCTL_DSP_SETDUPLEX: 1585 /* 1586 * switch to full-duplex mode if card is in half-duplex 1587 * mode and is able to work in full-duplex mode 1588 */ 1589 PCM_LOCK(d); 1590 if (rdch && wrch && (dsp_get_flags(i_dev) & SD_F_SIMPLEX)) 1591 dsp_set_flags(i_dev, dsp_get_flags(i_dev)^SD_F_SIMPLEX); 1592 PCM_UNLOCK(d); 1593 break; 1594 1595 /* 1596 * The following four ioctls are simple wrappers around mixer_ioctl 1597 * with no further processing. xcmd is short for "translated 1598 * command". 1599 */ 1600 case SNDCTL_DSP_GETRECVOL: 1601 if (xcmd == 0) { 1602 xcmd = SOUND_MIXER_READ_RECLEV; 1603 chn = rdch; 1604 } 1605 /* FALLTHROUGH */ 1606 case SNDCTL_DSP_SETRECVOL: 1607 if (xcmd == 0) { 1608 xcmd = SOUND_MIXER_WRITE_RECLEV; 1609 chn = rdch; 1610 } 1611 /* FALLTHROUGH */ 1612 case SNDCTL_DSP_GETPLAYVOL: 1613 if (xcmd == 0) { 1614 xcmd = SOUND_MIXER_READ_PCM; 1615 chn = wrch; 1616 } 1617 /* FALLTHROUGH */ 1618 case SNDCTL_DSP_SETPLAYVOL: 1619 if (xcmd == 0) { 1620 xcmd = SOUND_MIXER_WRITE_PCM; 1621 chn = wrch; 1622 } 1623 1624 ret = dsp_ioctl_channel(priv, chn, xcmd, arg); 1625 if (ret != -1) { 1626 PCM_GIANT_EXIT(d); 1627 return (ret); 1628 } 1629 1630 if (d->mixer_dev != NULL) { 1631 PCM_ACQUIRE_QUICK(d); 1632 ret = mixer_ioctl_cmd(d->mixer_dev, xcmd, arg, -1, td, 1633 MIXER_CMD_DIRECT); 1634 PCM_RELEASE_QUICK(d); 1635 } else 1636 ret = ENOTSUP; 1637 1638 break; 1639 1640 case SNDCTL_DSP_GET_RECSRC_NAMES: 1641 case SNDCTL_DSP_GET_RECSRC: 1642 case SNDCTL_DSP_SET_RECSRC: 1643 if (d->mixer_dev != NULL) { 1644 PCM_ACQUIRE_QUICK(d); 1645 ret = mixer_ioctl_cmd(d->mixer_dev, cmd, arg, -1, td, 1646 MIXER_CMD_DIRECT); 1647 PCM_RELEASE_QUICK(d); 1648 } else 1649 ret = ENOTSUP; 1650 break; 1651 1652 /* 1653 * The following 3 ioctls aren't very useful at the moment. For 1654 * now, only a single channel is associated with a cdev (/dev/dspN 1655 * instance), so there's only a single output routing to use (i.e., 1656 * the wrch bound to this cdev). 1657 */ 1658 case SNDCTL_DSP_GET_PLAYTGT_NAMES: 1659 { 1660 oss_mixer_enuminfo *ei; 1661 ei = (oss_mixer_enuminfo *)arg; 1662 ei->dev = 0; 1663 ei->ctrl = 0; 1664 ei->version = 0; /* static for now */ 1665 ei->strindex[0] = 0; 1666 1667 if (wrch != NULL) { 1668 ei->nvalues = 1; 1669 strlcpy(ei->strings, wrch->name, 1670 sizeof(ei->strings)); 1671 } else { 1672 ei->nvalues = 0; 1673 ei->strings[0] = '\0'; 1674 } 1675 } 1676 break; 1677 case SNDCTL_DSP_GET_PLAYTGT: 1678 case SNDCTL_DSP_SET_PLAYTGT: /* yes, they are the same for now */ 1679 /* 1680 * Re: SET_PLAYTGT 1681 * OSSv4: "The value that was accepted by the device will 1682 * be returned back in the variable pointed by the 1683 * argument." 1684 */ 1685 if (wrch != NULL) 1686 *arg_i = 0; 1687 else 1688 ret = EINVAL; 1689 break; 1690 1691 case SNDCTL_DSP_SILENCE: 1692 /* 1693 * Flush the software (pre-feed) buffer, but try to minimize playback 1694 * interruption. (I.e., record unplayed samples with intent to 1695 * restore by SNDCTL_DSP_SKIP.) Intended for application "pause" 1696 * functionality. 1697 */ 1698 if (wrch == NULL) 1699 ret = EINVAL; 1700 else { 1701 struct snd_dbuf *bs; 1702 CHN_LOCK(wrch); 1703 while (wrch->inprog != 0) 1704 cv_wait(&wrch->cv, wrch->lock); 1705 bs = wrch->bufsoft; 1706 if ((bs->shadbuf != NULL) && (sndbuf_getready(bs) > 0)) { 1707 bs->sl = sndbuf_getready(bs); 1708 sndbuf_dispose(bs, bs->shadbuf, sndbuf_getready(bs)); 1709 sndbuf_fillsilence(bs); 1710 chn_start(wrch, 0); 1711 } 1712 CHN_UNLOCK(wrch); 1713 } 1714 break; 1715 1716 case SNDCTL_DSP_SKIP: 1717 /* 1718 * OSSv4 docs: "This ioctl call discards all unplayed samples in the 1719 * playback buffer by moving the current write position immediately 1720 * before the point where the device is currently reading the samples." 1721 */ 1722 if (wrch == NULL) 1723 ret = EINVAL; 1724 else { 1725 struct snd_dbuf *bs; 1726 CHN_LOCK(wrch); 1727 while (wrch->inprog != 0) 1728 cv_wait(&wrch->cv, wrch->lock); 1729 bs = wrch->bufsoft; 1730 if ((bs->shadbuf != NULL) && (bs->sl > 0)) { 1731 sndbuf_softreset(bs); 1732 sndbuf_acquire(bs, bs->shadbuf, bs->sl); 1733 bs->sl = 0; 1734 chn_start(wrch, 0); 1735 } 1736 CHN_UNLOCK(wrch); 1737 } 1738 break; 1739 1740 case SNDCTL_DSP_CURRENT_OPTR: 1741 case SNDCTL_DSP_CURRENT_IPTR: 1742 /** 1743 * @note Changing formats resets the buffer counters, which differs 1744 * from the 4Front drivers. However, I don't expect this to be 1745 * much of a problem. 1746 * 1747 * @note In a test where @c CURRENT_OPTR is called immediately after write 1748 * returns, this driver is about 32K samples behind whereas 1749 * 4Front's is about 8K samples behind. Should determine source 1750 * of discrepancy, even if only out of curiosity. 1751 * 1752 * @todo Actually test SNDCTL_DSP_CURRENT_IPTR. 1753 */ 1754 chn = (cmd == SNDCTL_DSP_CURRENT_OPTR) ? wrch : rdch; 1755 if (chn == NULL) 1756 ret = EINVAL; 1757 else { 1758 struct snd_dbuf *bs; 1759 /* int tmp; */ 1760 1761 oss_count_t *oc = (oss_count_t *)arg; 1762 1763 CHN_LOCK(chn); 1764 bs = chn->bufsoft; 1765 #if 0 1766 tmp = (sndbuf_getsize(b) + chn_getptr(chn) - sndbuf_gethwptr(b)) % sndbuf_getsize(b); 1767 oc->samples = (sndbuf_gettotal(b) + tmp) / sndbuf_getalign(b); 1768 oc->fifo_samples = (sndbuf_getready(b) - tmp) / sndbuf_getalign(b); 1769 #else 1770 oc->samples = sndbuf_gettotal(bs) / sndbuf_getalign(bs); 1771 oc->fifo_samples = sndbuf_getready(bs) / sndbuf_getalign(bs); 1772 #endif 1773 CHN_UNLOCK(chn); 1774 } 1775 break; 1776 1777 case SNDCTL_DSP_HALT_OUTPUT: 1778 case SNDCTL_DSP_HALT_INPUT: 1779 chn = (cmd == SNDCTL_DSP_HALT_OUTPUT) ? wrch : rdch; 1780 if (chn == NULL) 1781 ret = EINVAL; 1782 else { 1783 CHN_LOCK(chn); 1784 chn_abort(chn); 1785 CHN_UNLOCK(chn); 1786 } 1787 break; 1788 1789 case SNDCTL_DSP_LOW_WATER: 1790 /* 1791 * Set the number of bytes required to attract attention by 1792 * select/poll. 1793 */ 1794 if (wrch != NULL) { 1795 CHN_LOCK(wrch); 1796 wrch->lw = (*arg_i > 1) ? *arg_i : 1; 1797 CHN_UNLOCK(wrch); 1798 } 1799 if (rdch != NULL) { 1800 CHN_LOCK(rdch); 1801 rdch->lw = (*arg_i > 1) ? *arg_i : 1; 1802 CHN_UNLOCK(rdch); 1803 } 1804 break; 1805 1806 case SNDCTL_DSP_GETERROR: 1807 /* 1808 * OSSv4 docs: "All errors and counters will automatically be 1809 * cleared to zeroes after the call so each call will return only 1810 * the errors that occurred after the previous invocation. ... The 1811 * play_underruns and rec_overrun fields are the only useful fields 1812 * returned by OSS 4.0." 1813 */ 1814 { 1815 audio_errinfo *ei = (audio_errinfo *)arg; 1816 1817 bzero((void *)ei, sizeof(*ei)); 1818 1819 if (wrch != NULL) { 1820 CHN_LOCK(wrch); 1821 ei->play_underruns = wrch->xruns; 1822 wrch->xruns = 0; 1823 CHN_UNLOCK(wrch); 1824 } 1825 if (rdch != NULL) { 1826 CHN_LOCK(rdch); 1827 ei->rec_overruns = rdch->xruns; 1828 rdch->xruns = 0; 1829 CHN_UNLOCK(rdch); 1830 } 1831 } 1832 break; 1833 1834 case SNDCTL_DSP_SYNCGROUP: 1835 PCM_ACQUIRE_QUICK(d); 1836 ret = dsp_oss_syncgroup(wrch, rdch, (oss_syncgroup *)arg); 1837 PCM_RELEASE_QUICK(d); 1838 break; 1839 1840 case SNDCTL_DSP_SYNCSTART: 1841 PCM_ACQUIRE_QUICK(d); 1842 ret = dsp_oss_syncstart(*arg_i); 1843 PCM_RELEASE_QUICK(d); 1844 break; 1845 1846 case SNDCTL_DSP_POLICY: 1847 PCM_ACQUIRE_QUICK(d); 1848 ret = dsp_oss_policy(wrch, rdch, *arg_i); 1849 PCM_RELEASE_QUICK(d); 1850 break; 1851 1852 case SNDCTL_DSP_COOKEDMODE: 1853 PCM_ACQUIRE_QUICK(d); 1854 if (!(dsp_get_flags(i_dev) & SD_F_BITPERFECT)) 1855 ret = dsp_oss_cookedmode(wrch, rdch, *arg_i); 1856 PCM_RELEASE_QUICK(d); 1857 break; 1858 case SNDCTL_DSP_GET_CHNORDER: 1859 PCM_ACQUIRE_QUICK(d); 1860 ret = dsp_oss_getchnorder(wrch, rdch, (unsigned long long *)arg); 1861 PCM_RELEASE_QUICK(d); 1862 break; 1863 case SNDCTL_DSP_SET_CHNORDER: 1864 PCM_ACQUIRE_QUICK(d); 1865 ret = dsp_oss_setchnorder(wrch, rdch, (unsigned long long *)arg); 1866 PCM_RELEASE_QUICK(d); 1867 break; 1868 case SNDCTL_DSP_GETCHANNELMASK: /* XXX vlc */ 1869 PCM_ACQUIRE_QUICK(d); 1870 ret = dsp_oss_getchannelmask(wrch, rdch, (int *)arg); 1871 PCM_RELEASE_QUICK(d); 1872 break; 1873 case SNDCTL_DSP_BIND_CHANNEL: /* XXX what?!? */ 1874 ret = EINVAL; 1875 break; 1876 #ifdef OSSV4_EXPERIMENT 1877 /* 1878 * XXX The following ioctls are not yet supported and just return 1879 * EINVAL. 1880 */ 1881 case SNDCTL_DSP_GETOPEAKS: 1882 case SNDCTL_DSP_GETIPEAKS: 1883 chn = (cmd == SNDCTL_DSP_GETOPEAKS) ? wrch : rdch; 1884 if (chn == NULL) 1885 ret = EINVAL; 1886 else { 1887 oss_peaks_t *op = (oss_peaks_t *)arg; 1888 int lpeak, rpeak; 1889 1890 CHN_LOCK(chn); 1891 ret = chn_getpeaks(chn, &lpeak, &rpeak); 1892 if (ret == -1) 1893 ret = EINVAL; 1894 else { 1895 (*op)[0] = lpeak; 1896 (*op)[1] = rpeak; 1897 } 1898 CHN_UNLOCK(chn); 1899 } 1900 break; 1901 1902 /* 1903 * XXX Once implemented, revisit this for proper cv protection 1904 * (if necessary). 1905 */ 1906 case SNDCTL_GETLABEL: 1907 ret = dsp_oss_getlabel(wrch, rdch, (oss_label_t *)arg); 1908 break; 1909 case SNDCTL_SETLABEL: 1910 ret = dsp_oss_setlabel(wrch, rdch, (oss_label_t *)arg); 1911 break; 1912 case SNDCTL_GETSONG: 1913 ret = dsp_oss_getsong(wrch, rdch, (oss_longname_t *)arg); 1914 break; 1915 case SNDCTL_SETSONG: 1916 ret = dsp_oss_setsong(wrch, rdch, (oss_longname_t *)arg); 1917 break; 1918 case SNDCTL_SETNAME: 1919 ret = dsp_oss_setname(wrch, rdch, (oss_longname_t *)arg); 1920 break; 1921 #if 0 1922 /** 1923 * @note The S/PDIF interface ioctls, @c SNDCTL_DSP_READCTL and 1924 * @c SNDCTL_DSP_WRITECTL have been omitted at the suggestion of 1925 * 4Front Technologies. 1926 */ 1927 case SNDCTL_DSP_READCTL: 1928 case SNDCTL_DSP_WRITECTL: 1929 ret = EINVAL; 1930 break; 1931 #endif /* !0 (explicitly omitted ioctls) */ 1932 1933 #endif /* !OSSV4_EXPERIMENT */ 1934 case SNDCTL_DSP_MAPINBUF: 1935 case SNDCTL_DSP_MAPOUTBUF: 1936 case SNDCTL_DSP_SETSYNCRO: 1937 /* undocumented */ 1938 1939 case SNDCTL_DSP_SUBDIVIDE: 1940 case SOUND_PCM_WRITE_FILTER: 1941 case SOUND_PCM_READ_FILTER: 1942 /* dunno what these do, don't sound important */ 1943 1944 default: 1945 DEB(printf("default ioctl fn 0x%08lx fail\n", cmd)); 1946 ret = EINVAL; 1947 break; 1948 } 1949 1950 PCM_GIANT_LEAVE(d); 1951 1952 return (ret); 1953 } 1954 1955 static int 1956 dsp_poll(struct cdev *i_dev, int events, struct thread *td) 1957 { 1958 struct dsp_cdevpriv *priv; 1959 struct snddev_info *d; 1960 struct pcm_channel *wrch, *rdch; 1961 int ret, e, err; 1962 1963 if ((err = devfs_get_cdevpriv((void **)&priv)) != 0) 1964 return (err); 1965 d = priv->sc; 1966 if (PCM_DETACHING(d) || !DSP_REGISTERED(d)) { 1967 /* XXX many clients don't understand POLLNVAL */ 1968 return (events & (POLLHUP | POLLPRI | POLLIN | 1969 POLLRDNORM | POLLOUT | POLLWRNORM)); 1970 } 1971 PCM_GIANT_ENTER(d); 1972 1973 ret = 0; 1974 1975 getchns(priv, SD_F_PRIO_RD | SD_F_PRIO_WR); 1976 wrch = priv->wrch; 1977 rdch = priv->rdch; 1978 1979 if (wrch != NULL && !(wrch->flags & CHN_F_DEAD)) { 1980 e = (events & (POLLOUT | POLLWRNORM)); 1981 if (e) 1982 ret |= chn_poll(wrch, e, td); 1983 } 1984 1985 if (rdch != NULL && !(rdch->flags & CHN_F_DEAD)) { 1986 e = (events & (POLLIN | POLLRDNORM)); 1987 if (e) 1988 ret |= chn_poll(rdch, e, td); 1989 } 1990 1991 relchns(priv, SD_F_PRIO_RD | SD_F_PRIO_WR); 1992 1993 PCM_GIANT_LEAVE(d); 1994 1995 return (ret); 1996 } 1997 1998 static int 1999 dsp_mmap(struct cdev *i_dev, vm_ooffset_t offset, vm_paddr_t *paddr, 2000 int nprot, vm_memattr_t *memattr) 2001 { 2002 2003 /* 2004 * offset is in range due to checks in dsp_mmap_single(). 2005 * XXX memattr is not honored. 2006 */ 2007 *paddr = vtophys(offset); 2008 return (0); 2009 } 2010 2011 static int 2012 dsp_mmap_single(struct cdev *i_dev, vm_ooffset_t *offset, 2013 vm_size_t size, struct vm_object **object, int nprot) 2014 { 2015 struct dsp_cdevpriv *priv; 2016 struct snddev_info *d; 2017 struct pcm_channel *wrch, *rdch, *c; 2018 int err; 2019 2020 /* 2021 * Reject PROT_EXEC by default. It just doesn't makes sense. 2022 * Unfortunately, we have to give up this one due to linux_mmap 2023 * changes. 2024 * 2025 * https://lists.freebsd.org/pipermail/freebsd-emulation/2007-June/003698.html 2026 * 2027 */ 2028 #ifdef SV_ABI_LINUX 2029 if ((nprot & PROT_EXEC) && (dsp_mmap_allow_prot_exec < 0 || 2030 (dsp_mmap_allow_prot_exec == 0 && 2031 SV_CURPROC_ABI() != SV_ABI_LINUX))) 2032 #else 2033 if ((nprot & PROT_EXEC) && dsp_mmap_allow_prot_exec < 1) 2034 #endif 2035 return (EINVAL); 2036 2037 /* 2038 * PROT_READ (alone) selects the input buffer. 2039 * PROT_WRITE (alone) selects the output buffer. 2040 * PROT_WRITE|PROT_READ together select the output buffer. 2041 */ 2042 if ((nprot & (PROT_READ | PROT_WRITE)) == 0) 2043 return (EINVAL); 2044 2045 if ((err = devfs_get_cdevpriv((void **)&priv)) != 0) 2046 return (err); 2047 d = priv->sc; 2048 if (PCM_DETACHING(d) || !DSP_REGISTERED(d)) 2049 return (EINVAL); 2050 2051 PCM_GIANT_ENTER(d); 2052 2053 getchns(priv, SD_F_PRIO_RD | SD_F_PRIO_WR); 2054 wrch = priv->wrch; 2055 rdch = priv->rdch; 2056 2057 c = ((nprot & PROT_WRITE) != 0) ? wrch : rdch; 2058 if (c == NULL || (c->flags & CHN_F_MMAP_INVALID) || 2059 (*offset + size) > sndbuf_getallocsize(c->bufsoft) || 2060 (wrch != NULL && (wrch->flags & CHN_F_MMAP_INVALID)) || 2061 (rdch != NULL && (rdch->flags & CHN_F_MMAP_INVALID))) { 2062 relchns(priv, SD_F_PRIO_RD | SD_F_PRIO_WR); 2063 PCM_GIANT_EXIT(d); 2064 return (EINVAL); 2065 } 2066 2067 if (wrch != NULL) 2068 wrch->flags |= CHN_F_MMAP; 2069 if (rdch != NULL) 2070 rdch->flags |= CHN_F_MMAP; 2071 2072 *offset = (uintptr_t)sndbuf_getbufofs(c->bufsoft, *offset); 2073 relchns(priv, SD_F_PRIO_RD | SD_F_PRIO_WR); 2074 *object = vm_pager_allocate(OBJT_DEVICE, i_dev, 2075 size, nprot, *offset, curthread->td_ucred); 2076 2077 PCM_GIANT_LEAVE(d); 2078 2079 if (*object == NULL) 2080 return (EINVAL); 2081 return (0); 2082 } 2083 2084 static void 2085 dsp_clone(void *arg, struct ucred *cred, char *name, int namelen, 2086 struct cdev **dev) 2087 { 2088 struct snddev_info *d; 2089 int i; 2090 2091 if (*dev != NULL) 2092 return; 2093 if (strcmp(name, "dsp") == 0 && dsp_basename_clone) 2094 goto found; 2095 for (i = 0; i < nitems(dsp_cdevs); i++) { 2096 if (dsp_cdevs[i].alias != NULL && 2097 strcmp(name, dsp_cdevs[i].name) == 0) 2098 goto found; 2099 } 2100 return; 2101 found: 2102 d = devclass_get_softc(pcm_devclass, snd_unit); 2103 if (!PCM_REGISTERED(d)) 2104 return; 2105 *dev = d->dsp_dev; 2106 dev_ref(*dev); 2107 } 2108 2109 static void 2110 dsp_sysinit(void *p) 2111 { 2112 if (dsp_ehtag != NULL) 2113 return; 2114 /* initialize unit numbering */ 2115 snd_unit_init(); 2116 dsp_ehtag = EVENTHANDLER_REGISTER(dev_clone, dsp_clone, 0, 1000); 2117 } 2118 2119 static void 2120 dsp_sysuninit(void *p) 2121 { 2122 if (dsp_ehtag == NULL) 2123 return; 2124 EVENTHANDLER_DEREGISTER(dev_clone, dsp_ehtag); 2125 dsp_ehtag = NULL; 2126 } 2127 2128 SYSINIT(dsp_sysinit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysinit, NULL); 2129 SYSUNINIT(dsp_sysuninit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysuninit, NULL); 2130 2131 char * 2132 dsp_unit2name(char *buf, size_t len, int unit) 2133 { 2134 int i, dtype; 2135 2136 KASSERT(buf != NULL && len != 0, 2137 ("bogus buf=%p len=%ju", buf, (uintmax_t)len)); 2138 2139 dtype = snd_unit2d(unit); 2140 2141 for (i = 0; i < nitems(dsp_cdevs); i++) { 2142 if (dtype != dsp_cdevs[i].type || dsp_cdevs[i].alias != NULL) 2143 continue; 2144 snprintf(buf, len, "%s%d%s%d", dsp_cdevs[i].name, 2145 snd_unit2u(unit), dsp_cdevs[i].sep, snd_unit2c(unit)); 2146 return (buf); 2147 } 2148 2149 return (NULL); 2150 } 2151 2152 static int 2153 dsp_oss_audioinfo_cb(void *data, void *arg) 2154 { 2155 struct dsp_cdevpriv *priv = data; 2156 struct pcm_channel *ch = arg; 2157 2158 if (DSP_REGISTERED(priv->sc) && (ch == priv->rdch || ch == priv->wrch)) 2159 return (1); 2160 2161 return (0); 2162 } 2163 2164 /** 2165 * @brief Handler for SNDCTL_AUDIOINFO. 2166 * 2167 * Gathers information about the audio device specified in ai->dev. If 2168 * ai->dev == -1, then this function gathers information about the current 2169 * device. If the call comes in on a non-audio device and ai->dev == -1, 2170 * return EINVAL. 2171 * 2172 * This routine is supposed to go practically straight to the hardware, 2173 * getting capabilities directly from the sound card driver, side-stepping 2174 * the intermediate channel interface. 2175 * 2176 * @note 2177 * Calling threads must not hold any snddev_info or pcm_channel locks. 2178 * 2179 * @param dev device on which the ioctl was issued 2180 * @param ai ioctl request data container 2181 * 2182 * @retval 0 success 2183 * @retval EINVAL ai->dev specifies an invalid device 2184 * 2185 * @todo Verify correctness of Doxygen tags. ;) 2186 */ 2187 int 2188 dsp_oss_audioinfo(struct cdev *i_dev, oss_audioinfo *ai) 2189 { 2190 struct pcmchan_caps *caps; 2191 struct pcm_channel *ch; 2192 struct snddev_info *d; 2193 uint32_t fmts; 2194 int i, nchan, *rates, minch, maxch; 2195 char *devname, buf[CHN_NAMELEN]; 2196 2197 /* 2198 * If probing the device that received the ioctl, make sure it's a 2199 * DSP device. (Users may use this ioctl with /dev/mixer and 2200 * /dev/midi.) 2201 */ 2202 if (ai->dev == -1 && i_dev->si_devsw != &dsp_cdevsw) 2203 return (EINVAL); 2204 2205 ch = NULL; 2206 devname = NULL; 2207 nchan = 0; 2208 bzero(buf, sizeof(buf)); 2209 2210 /* 2211 * Search for the requested audio device (channel). Start by 2212 * iterating over pcm devices. 2213 */ 2214 for (i = 0; pcm_devclass != NULL && 2215 i < devclass_get_maxunit(pcm_devclass); i++) { 2216 d = devclass_get_softc(pcm_devclass, i); 2217 if (!PCM_REGISTERED(d)) 2218 continue; 2219 2220 /* XXX Need Giant magic entry ??? */ 2221 2222 /* See the note in function docblock */ 2223 PCM_UNLOCKASSERT(d); 2224 PCM_LOCK(d); 2225 2226 CHN_FOREACH(ch, d, channels.pcm) { 2227 CHN_UNLOCKASSERT(ch); 2228 CHN_LOCK(ch); 2229 if (ai->dev == -1) { 2230 if (devfs_foreach_cdevpriv(i_dev, 2231 dsp_oss_audioinfo_cb, ch) != 0) { 2232 devname = dsp_unit2name(buf, 2233 sizeof(buf), ch->unit); 2234 } 2235 } else if (ai->dev == nchan) { 2236 devname = dsp_unit2name(buf, sizeof(buf), 2237 ch->unit); 2238 } 2239 if (devname != NULL) 2240 break; 2241 CHN_UNLOCK(ch); 2242 ++nchan; 2243 } 2244 2245 if (devname != NULL) { 2246 /* 2247 * At this point, the following synchronization stuff 2248 * has happened: 2249 * - a specific PCM device is locked. 2250 * - a specific audio channel has been locked, so be 2251 * sure to unlock when exiting; 2252 */ 2253 2254 caps = chn_getcaps(ch); 2255 2256 /* 2257 * With all handles collected, zero out the user's 2258 * container and begin filling in its fields. 2259 */ 2260 bzero((void *)ai, sizeof(oss_audioinfo)); 2261 2262 ai->dev = nchan; 2263 strlcpy(ai->name, ch->name, sizeof(ai->name)); 2264 2265 if ((ch->flags & CHN_F_BUSY) == 0) 2266 ai->busy = 0; 2267 else 2268 ai->busy = (ch->direction == PCMDIR_PLAY) ? OPEN_WRITE : OPEN_READ; 2269 2270 /** 2271 * @note 2272 * @c cmd - OSSv4 docs: "Only supported under Linux at 2273 * this moment." Cop-out, I know, but I'll save 2274 * running around in the process table for later. 2275 * Is there a risk of leaking information? 2276 */ 2277 ai->pid = ch->pid; 2278 2279 /* 2280 * These flags stolen from SNDCTL_DSP_GETCAPS handler. 2281 * Note, however, that a single channel operates in 2282 * only one direction, so PCM_CAP_DUPLEX is out. 2283 */ 2284 /** 2285 * @todo @c SNDCTL_AUDIOINFO::caps - Make drivers keep 2286 * these in pcmchan::caps? 2287 */ 2288 ai->caps = PCM_CAP_REALTIME | PCM_CAP_MMAP | PCM_CAP_TRIGGER | 2289 ((ch->flags & CHN_F_VIRTUAL) ? PCM_CAP_VIRTUAL : 0) | 2290 ((ch->direction == PCMDIR_PLAY) ? PCM_CAP_OUTPUT : PCM_CAP_INPUT); 2291 2292 /* 2293 * Collect formats supported @b natively by the 2294 * device. Also determine min/max channels. (I.e., 2295 * mono, stereo, or both?) 2296 * 2297 * If any channel is stereo, maxch = 2; 2298 * if all channels are stereo, minch = 2, too; 2299 * if any channel is mono, minch = 1; 2300 * and if all channels are mono, maxch = 1. 2301 */ 2302 minch = 0; 2303 maxch = 0; 2304 fmts = 0; 2305 for (i = 0; caps->fmtlist[i]; i++) { 2306 fmts |= caps->fmtlist[i]; 2307 if (AFMT_CHANNEL(caps->fmtlist[i]) > 1) { 2308 minch = (minch == 0) ? 2 : minch; 2309 maxch = 2; 2310 } else { 2311 minch = 1; 2312 maxch = (maxch == 0) ? 1 : maxch; 2313 } 2314 } 2315 2316 if (ch->direction == PCMDIR_PLAY) 2317 ai->oformats = fmts; 2318 else 2319 ai->iformats = fmts; 2320 2321 /** 2322 * @note 2323 * @c magic - OSSv4 docs: "Reserved for internal use 2324 * by OSS." 2325 * 2326 * @par 2327 * @c card_number - OSSv4 docs: "Number of the sound 2328 * card where this device belongs or -1 if this 2329 * information is not available. Applications 2330 * should normally not use this field for any 2331 * purpose." 2332 */ 2333 ai->card_number = -1; 2334 /** 2335 * @todo @c song_name - depends first on 2336 * SNDCTL_[GS]ETSONG @todo @c label - depends 2337 * on SNDCTL_[GS]ETLABEL 2338 * @todo @c port_number - routing information? 2339 */ 2340 ai->port_number = -1; 2341 ai->mixer_dev = (d->mixer_dev != NULL) ? PCMUNIT(d->mixer_dev) : -1; 2342 /** 2343 * @note 2344 * @c real_device - OSSv4 docs: "Obsolete." 2345 */ 2346 ai->real_device = -1; 2347 snprintf(ai->devnode, sizeof(ai->devnode), 2348 "/dev/dsp%d", device_get_unit(d->dev)); 2349 ai->enabled = device_is_attached(d->dev) ? 1 : 0; 2350 /** 2351 * @note 2352 * @c flags - OSSv4 docs: "Reserved for future use." 2353 * 2354 * @note 2355 * @c binding - OSSv4 docs: "Reserved for future use." 2356 * 2357 * @todo @c handle - haven't decided how to generate 2358 * this yet; bus, vendor, device IDs? 2359 */ 2360 ai->min_rate = caps->minspeed; 2361 ai->max_rate = caps->maxspeed; 2362 2363 ai->min_channels = minch; 2364 ai->max_channels = maxch; 2365 2366 ai->nrates = chn_getrates(ch, &rates); 2367 if (ai->nrates > OSS_MAX_SAMPLE_RATES) 2368 ai->nrates = OSS_MAX_SAMPLE_RATES; 2369 2370 for (i = 0; i < ai->nrates; i++) 2371 ai->rates[i] = rates[i]; 2372 2373 ai->next_play_engine = 0; 2374 ai->next_rec_engine = 0; 2375 2376 CHN_UNLOCK(ch); 2377 } 2378 2379 PCM_UNLOCK(d); 2380 2381 if (devname != NULL) 2382 return (0); 2383 } 2384 2385 /* Exhausted the search -- nothing is locked, so return. */ 2386 return (EINVAL); 2387 } 2388 2389 /** 2390 * @brief Assigns a PCM channel to a sync group. 2391 * 2392 * Sync groups are used to enable audio operations on multiple devices 2393 * simultaneously. They may be used with any number of devices and may 2394 * span across applications. Devices are added to groups with 2395 * the SNDCTL_DSP_SYNCGROUP ioctl, and operations are triggered with the 2396 * SNDCTL_DSP_SYNCSTART ioctl. 2397 * 2398 * If the @c id field of the @c group parameter is set to zero, then a new 2399 * sync group is created. Otherwise, wrch and rdch (if set) are added to 2400 * the group specified. 2401 * 2402 * @todo As far as memory allocation, should we assume that things are 2403 * okay and allocate with M_WAITOK before acquiring channel locks, 2404 * freeing later if not? 2405 * 2406 * @param wrch output channel associated w/ device (if any) 2407 * @param rdch input channel associated w/ device (if any) 2408 * @param group Sync group parameters 2409 * 2410 * @retval 0 success 2411 * @retval non-zero error to be propagated upstream 2412 */ 2413 static int 2414 dsp_oss_syncgroup(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_syncgroup *group) 2415 { 2416 struct pcmchan_syncmember *smrd, *smwr; 2417 struct pcmchan_syncgroup *sg; 2418 int ret, sg_ids[3]; 2419 2420 smrd = NULL; 2421 smwr = NULL; 2422 sg = NULL; 2423 ret = 0; 2424 2425 /* 2426 * Free_unr() may sleep, so store released syncgroup IDs until after 2427 * all locks are released. 2428 */ 2429 sg_ids[0] = sg_ids[1] = sg_ids[2] = 0; 2430 2431 PCM_SG_LOCK(); 2432 2433 /* 2434 * - Insert channel(s) into group's member list. 2435 * - Set CHN_F_NOTRIGGER on channel(s). 2436 * - Stop channel(s). 2437 */ 2438 2439 /* 2440 * If device's channels are already mapped to a group, unmap them. 2441 */ 2442 if (wrch) { 2443 CHN_LOCK(wrch); 2444 sg_ids[0] = chn_syncdestroy(wrch); 2445 } 2446 2447 if (rdch) { 2448 CHN_LOCK(rdch); 2449 sg_ids[1] = chn_syncdestroy(rdch); 2450 } 2451 2452 /* 2453 * Verify that mode matches character device properites. 2454 * - Bail if PCM_ENABLE_OUTPUT && wrch == NULL. 2455 * - Bail if PCM_ENABLE_INPUT && rdch == NULL. 2456 */ 2457 if (((wrch == NULL) && (group->mode & PCM_ENABLE_OUTPUT)) || 2458 ((rdch == NULL) && (group->mode & PCM_ENABLE_INPUT))) { 2459 ret = EINVAL; 2460 goto out; 2461 } 2462 2463 /* 2464 * An id of zero indicates the user wants to create a new 2465 * syncgroup. 2466 */ 2467 if (group->id == 0) { 2468 sg = (struct pcmchan_syncgroup *)malloc(sizeof(*sg), M_DEVBUF, M_NOWAIT); 2469 if (sg != NULL) { 2470 SLIST_INIT(&sg->members); 2471 sg->id = alloc_unr(pcmsg_unrhdr); 2472 2473 group->id = sg->id; 2474 SLIST_INSERT_HEAD(&snd_pcm_syncgroups, sg, link); 2475 } else 2476 ret = ENOMEM; 2477 } else { 2478 SLIST_FOREACH(sg, &snd_pcm_syncgroups, link) { 2479 if (sg->id == group->id) 2480 break; 2481 } 2482 if (sg == NULL) 2483 ret = EINVAL; 2484 } 2485 2486 /* Couldn't create or find a syncgroup. Fail. */ 2487 if (sg == NULL) 2488 goto out; 2489 2490 /* 2491 * Allocate a syncmember, assign it and a channel together, and 2492 * insert into syncgroup. 2493 */ 2494 if (group->mode & PCM_ENABLE_INPUT) { 2495 smrd = (struct pcmchan_syncmember *)malloc(sizeof(*smrd), M_DEVBUF, M_NOWAIT); 2496 if (smrd == NULL) { 2497 ret = ENOMEM; 2498 goto out; 2499 } 2500 2501 SLIST_INSERT_HEAD(&sg->members, smrd, link); 2502 smrd->parent = sg; 2503 smrd->ch = rdch; 2504 2505 chn_abort(rdch); 2506 rdch->flags |= CHN_F_NOTRIGGER; 2507 rdch->sm = smrd; 2508 } 2509 2510 if (group->mode & PCM_ENABLE_OUTPUT) { 2511 smwr = (struct pcmchan_syncmember *)malloc(sizeof(*smwr), M_DEVBUF, M_NOWAIT); 2512 if (smwr == NULL) { 2513 ret = ENOMEM; 2514 goto out; 2515 } 2516 2517 SLIST_INSERT_HEAD(&sg->members, smwr, link); 2518 smwr->parent = sg; 2519 smwr->ch = wrch; 2520 2521 chn_abort(wrch); 2522 wrch->flags |= CHN_F_NOTRIGGER; 2523 wrch->sm = smwr; 2524 } 2525 2526 out: 2527 if (ret != 0) { 2528 if (smrd != NULL) 2529 free(smrd, M_DEVBUF); 2530 if ((sg != NULL) && SLIST_EMPTY(&sg->members)) { 2531 sg_ids[2] = sg->id; 2532 SLIST_REMOVE(&snd_pcm_syncgroups, sg, pcmchan_syncgroup, link); 2533 free(sg, M_DEVBUF); 2534 } 2535 2536 if (wrch) 2537 wrch->sm = NULL; 2538 if (rdch) 2539 rdch->sm = NULL; 2540 } 2541 2542 if (wrch) 2543 CHN_UNLOCK(wrch); 2544 if (rdch) 2545 CHN_UNLOCK(rdch); 2546 2547 PCM_SG_UNLOCK(); 2548 2549 if (sg_ids[0]) 2550 free_unr(pcmsg_unrhdr, sg_ids[0]); 2551 if (sg_ids[1]) 2552 free_unr(pcmsg_unrhdr, sg_ids[1]); 2553 if (sg_ids[2]) 2554 free_unr(pcmsg_unrhdr, sg_ids[2]); 2555 2556 return (ret); 2557 } 2558 2559 /** 2560 * @brief Launch a sync group into action 2561 * 2562 * Sync groups are established via SNDCTL_DSP_SYNCGROUP. This function 2563 * iterates over all members, triggering them along the way. 2564 * 2565 * @note Caller must not hold any channel locks. 2566 * 2567 * @param sg_id sync group identifier 2568 * 2569 * @retval 0 success 2570 * @retval non-zero error worthy of propagating upstream to user 2571 */ 2572 static int 2573 dsp_oss_syncstart(int sg_id) 2574 { 2575 struct pcmchan_syncmember *sm, *sm_tmp; 2576 struct pcmchan_syncgroup *sg; 2577 struct pcm_channel *c; 2578 int ret, needlocks; 2579 2580 /* Get the synclists lock */ 2581 PCM_SG_LOCK(); 2582 2583 do { 2584 ret = 0; 2585 needlocks = 0; 2586 2587 /* Search for syncgroup by ID */ 2588 SLIST_FOREACH(sg, &snd_pcm_syncgroups, link) { 2589 if (sg->id == sg_id) 2590 break; 2591 } 2592 2593 /* Return EINVAL if not found */ 2594 if (sg == NULL) { 2595 ret = EINVAL; 2596 break; 2597 } 2598 2599 /* Any removals resulting in an empty group should've handled this */ 2600 KASSERT(!SLIST_EMPTY(&sg->members), ("found empty syncgroup")); 2601 2602 /* 2603 * Attempt to lock all member channels - if any are already 2604 * locked, unlock those acquired, sleep for a bit, and try 2605 * again. 2606 */ 2607 SLIST_FOREACH(sm, &sg->members, link) { 2608 if (CHN_TRYLOCK(sm->ch) == 0) { 2609 int timo = hz * 5/1000; 2610 if (timo < 1) 2611 timo = 1; 2612 2613 /* Release all locked channels so far, retry */ 2614 SLIST_FOREACH(sm_tmp, &sg->members, link) { 2615 /* sm is the member already locked */ 2616 if (sm == sm_tmp) 2617 break; 2618 CHN_UNLOCK(sm_tmp->ch); 2619 } 2620 2621 /** @todo Is PRIBIO correct/ */ 2622 ret = msleep(sm, &snd_pcm_syncgroups_mtx, 2623 PRIBIO | PCATCH, "pcmsg", timo); 2624 if (ret == EINTR || ret == ERESTART) 2625 break; 2626 2627 needlocks = 1; 2628 ret = 0; /* Assumes ret == EAGAIN... */ 2629 } 2630 } 2631 } while (needlocks && ret == 0); 2632 2633 /* Proceed only if no errors encountered. */ 2634 if (ret == 0) { 2635 /* Launch channels */ 2636 while ((sm = SLIST_FIRST(&sg->members)) != NULL) { 2637 SLIST_REMOVE_HEAD(&sg->members, link); 2638 2639 c = sm->ch; 2640 c->sm = NULL; 2641 chn_start(c, 1); 2642 c->flags &= ~CHN_F_NOTRIGGER; 2643 CHN_UNLOCK(c); 2644 2645 free(sm, M_DEVBUF); 2646 } 2647 2648 SLIST_REMOVE(&snd_pcm_syncgroups, sg, pcmchan_syncgroup, link); 2649 free(sg, M_DEVBUF); 2650 } 2651 2652 PCM_SG_UNLOCK(); 2653 2654 /* 2655 * Free_unr() may sleep, so be sure to give up the syncgroup lock 2656 * first. 2657 */ 2658 if (ret == 0) 2659 free_unr(pcmsg_unrhdr, sg_id); 2660 2661 return (ret); 2662 } 2663 2664 /** 2665 * @brief Handler for SNDCTL_DSP_POLICY 2666 * 2667 * The SNDCTL_DSP_POLICY ioctl is a simpler interface to control fragment 2668 * size and count like with SNDCTL_DSP_SETFRAGMENT. Instead of the user 2669 * specifying those two parameters, s/he simply selects a number from 0..10 2670 * which corresponds to a buffer size. Smaller numbers request smaller 2671 * buffers with lower latencies (at greater overhead from more frequent 2672 * interrupts), while greater numbers behave in the opposite manner. 2673 * 2674 * The 4Front spec states that a value of 5 should be the default. However, 2675 * this implementation deviates slightly by using a linear scale without 2676 * consulting drivers. I.e., even though drivers may have different default 2677 * buffer sizes, a policy argument of 5 will have the same result across 2678 * all drivers. 2679 * 2680 * See http://manuals.opensound.com/developer/SNDCTL_DSP_POLICY.html for 2681 * more information. 2682 * 2683 * @todo When SNDCTL_DSP_COOKEDMODE is supported, it'll be necessary to 2684 * work with hardware drivers directly. 2685 * 2686 * @note PCM channel arguments must not be locked by caller. 2687 * 2688 * @param wrch Pointer to opened playback channel (optional; may be NULL) 2689 * @param rdch " recording channel (optional; may be NULL) 2690 * @param policy Integer from [0:10] 2691 * 2692 * @retval 0 constant (for now) 2693 */ 2694 static int 2695 dsp_oss_policy(struct pcm_channel *wrch, struct pcm_channel *rdch, int policy) 2696 { 2697 int ret; 2698 2699 if (policy < CHN_POLICY_MIN || policy > CHN_POLICY_MAX) 2700 return (EIO); 2701 2702 /* Default: success */ 2703 ret = 0; 2704 2705 if (rdch) { 2706 CHN_LOCK(rdch); 2707 ret = chn_setlatency(rdch, policy); 2708 CHN_UNLOCK(rdch); 2709 } 2710 2711 if (wrch && ret == 0) { 2712 CHN_LOCK(wrch); 2713 ret = chn_setlatency(wrch, policy); 2714 CHN_UNLOCK(wrch); 2715 } 2716 2717 if (ret) 2718 ret = EIO; 2719 2720 return (ret); 2721 } 2722 2723 /** 2724 * @brief Enable or disable "cooked" mode 2725 * 2726 * This is a handler for @c SNDCTL_DSP_COOKEDMODE. When in cooked mode, which 2727 * is the default, the sound system handles rate and format conversions 2728 * automatically (ex: user writing 11025Hz/8 bit/unsigned but card only 2729 * operates with 44100Hz/16bit/signed samples). 2730 * 2731 * Disabling cooked mode is intended for applications wanting to mmap() 2732 * a sound card's buffer space directly, bypassing the FreeBSD 2-stage 2733 * feeder architecture, presumably to gain as much control over audio 2734 * hardware as possible. 2735 * 2736 * See @c http://manuals.opensound.com/developer/SNDCTL_DSP_COOKEDMODE.html 2737 * for more details. 2738 * 2739 * @param wrch playback channel (optional; may be NULL) 2740 * @param rdch recording channel (optional; may be NULL) 2741 * @param enabled 0 = raw mode, 1 = cooked mode 2742 * 2743 * @retval EINVAL Operation not yet supported. 2744 */ 2745 static int 2746 dsp_oss_cookedmode(struct pcm_channel *wrch, struct pcm_channel *rdch, int enabled) 2747 { 2748 2749 /* 2750 * XXX I just don't get it. Why don't they call it 2751 * "BITPERFECT" ~ SNDCTL_DSP_BITPERFECT !?!?. 2752 * This is just plain so confusing, incoherent, 2753 * <insert any non-printable characters here>. 2754 */ 2755 if (!(enabled == 1 || enabled == 0)) 2756 return (EINVAL); 2757 2758 /* 2759 * I won't give in. I'm inverting its logic here and now. 2760 * Brag all you want, but "BITPERFECT" should be the better 2761 * term here. 2762 */ 2763 enabled ^= 0x00000001; 2764 2765 if (wrch != NULL) { 2766 CHN_LOCK(wrch); 2767 wrch->flags &= ~CHN_F_BITPERFECT; 2768 wrch->flags |= (enabled != 0) ? CHN_F_BITPERFECT : 0x00000000; 2769 CHN_UNLOCK(wrch); 2770 } 2771 2772 if (rdch != NULL) { 2773 CHN_LOCK(rdch); 2774 rdch->flags &= ~CHN_F_BITPERFECT; 2775 rdch->flags |= (enabled != 0) ? CHN_F_BITPERFECT : 0x00000000; 2776 CHN_UNLOCK(rdch); 2777 } 2778 2779 return (0); 2780 } 2781 2782 /** 2783 * @brief Retrieve channel interleaving order 2784 * 2785 * This is the handler for @c SNDCTL_DSP_GET_CHNORDER. 2786 * 2787 * See @c http://manuals.opensound.com/developer/SNDCTL_DSP_GET_CHNORDER.html 2788 * for more details. 2789 * 2790 * @note As the ioctl definition is still under construction, FreeBSD 2791 * does not currently support SNDCTL_DSP_GET_CHNORDER. 2792 * 2793 * @param wrch playback channel (optional; may be NULL) 2794 * @param rdch recording channel (optional; may be NULL) 2795 * @param map channel map (result will be stored there) 2796 * 2797 * @retval EINVAL Operation not yet supported. 2798 */ 2799 static int 2800 dsp_oss_getchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map) 2801 { 2802 struct pcm_channel *ch; 2803 int ret; 2804 2805 ch = (wrch != NULL) ? wrch : rdch; 2806 if (ch != NULL) { 2807 CHN_LOCK(ch); 2808 ret = chn_oss_getorder(ch, map); 2809 CHN_UNLOCK(ch); 2810 } else 2811 ret = EINVAL; 2812 2813 return (ret); 2814 } 2815 2816 /** 2817 * @brief Specify channel interleaving order 2818 * 2819 * This is the handler for @c SNDCTL_DSP_SET_CHNORDER. 2820 * 2821 * @note As the ioctl definition is still under construction, FreeBSD 2822 * does not currently support @c SNDCTL_DSP_SET_CHNORDER. 2823 * 2824 * @param wrch playback channel (optional; may be NULL) 2825 * @param rdch recording channel (optional; may be NULL) 2826 * @param map channel map 2827 * 2828 * @retval EINVAL Operation not yet supported. 2829 */ 2830 static int 2831 dsp_oss_setchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map) 2832 { 2833 int ret; 2834 2835 ret = 0; 2836 2837 if (wrch != NULL) { 2838 CHN_LOCK(wrch); 2839 ret = chn_oss_setorder(wrch, map); 2840 CHN_UNLOCK(wrch); 2841 } 2842 2843 if (ret == 0 && rdch != NULL) { 2844 CHN_LOCK(rdch); 2845 ret = chn_oss_setorder(rdch, map); 2846 CHN_UNLOCK(rdch); 2847 } 2848 2849 return (ret); 2850 } 2851 2852 static int 2853 dsp_oss_getchannelmask(struct pcm_channel *wrch, struct pcm_channel *rdch, 2854 int *mask) 2855 { 2856 struct pcm_channel *ch; 2857 uint32_t chnmask; 2858 int ret; 2859 2860 chnmask = 0; 2861 ch = (wrch != NULL) ? wrch : rdch; 2862 2863 if (ch != NULL) { 2864 CHN_LOCK(ch); 2865 ret = chn_oss_getmask(ch, &chnmask); 2866 CHN_UNLOCK(ch); 2867 } else 2868 ret = EINVAL; 2869 2870 if (ret == 0) 2871 *mask = chnmask; 2872 2873 return (ret); 2874 } 2875 2876 #ifdef OSSV4_EXPERIMENT 2877 /** 2878 * @brief Retrieve an audio device's label 2879 * 2880 * This is a handler for the @c SNDCTL_GETLABEL ioctl. 2881 * 2882 * See @c http://manuals.opensound.com/developer/SNDCTL_GETLABEL.html 2883 * for more details. 2884 * 2885 * From Hannu@4Front: "For example ossxmix (just like some HW mixer 2886 * consoles) can show variable "labels" for certain controls. By default 2887 * the application name (say quake) is shown as the label but 2888 * applications may change the labels themselves." 2889 * 2890 * @note As the ioctl definition is still under construction, FreeBSD 2891 * does not currently support @c SNDCTL_GETLABEL. 2892 * 2893 * @param wrch playback channel (optional; may be NULL) 2894 * @param rdch recording channel (optional; may be NULL) 2895 * @param label label gets copied here 2896 * 2897 * @retval EINVAL Operation not yet supported. 2898 */ 2899 static int 2900 dsp_oss_getlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label) 2901 { 2902 return (EINVAL); 2903 } 2904 2905 /** 2906 * @brief Specify an audio device's label 2907 * 2908 * This is a handler for the @c SNDCTL_SETLABEL ioctl. Please see the 2909 * comments for @c dsp_oss_getlabel immediately above. 2910 * 2911 * See @c http://manuals.opensound.com/developer/SNDCTL_GETLABEL.html 2912 * for more details. 2913 * 2914 * @note As the ioctl definition is still under construction, FreeBSD 2915 * does not currently support SNDCTL_SETLABEL. 2916 * 2917 * @param wrch playback channel (optional; may be NULL) 2918 * @param rdch recording channel (optional; may be NULL) 2919 * @param label label gets copied from here 2920 * 2921 * @retval EINVAL Operation not yet supported. 2922 */ 2923 static int 2924 dsp_oss_setlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label) 2925 { 2926 return (EINVAL); 2927 } 2928 2929 /** 2930 * @brief Retrieve name of currently played song 2931 * 2932 * This is a handler for the @c SNDCTL_GETSONG ioctl. Audio players could 2933 * tell the system the name of the currently playing song, which would be 2934 * visible in @c /dev/sndstat. 2935 * 2936 * See @c http://manuals.opensound.com/developer/SNDCTL_GETSONG.html 2937 * for more details. 2938 * 2939 * @note As the ioctl definition is still under construction, FreeBSD 2940 * does not currently support SNDCTL_GETSONG. 2941 * 2942 * @param wrch playback channel (optional; may be NULL) 2943 * @param rdch recording channel (optional; may be NULL) 2944 * @param song song name gets copied here 2945 * 2946 * @retval EINVAL Operation not yet supported. 2947 */ 2948 static int 2949 dsp_oss_getsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song) 2950 { 2951 return (EINVAL); 2952 } 2953 2954 /** 2955 * @brief Retrieve name of currently played song 2956 * 2957 * This is a handler for the @c SNDCTL_SETSONG ioctl. Audio players could 2958 * tell the system the name of the currently playing song, which would be 2959 * visible in @c /dev/sndstat. 2960 * 2961 * See @c http://manuals.opensound.com/developer/SNDCTL_SETSONG.html 2962 * for more details. 2963 * 2964 * @note As the ioctl definition is still under construction, FreeBSD 2965 * does not currently support SNDCTL_SETSONG. 2966 * 2967 * @param wrch playback channel (optional; may be NULL) 2968 * @param rdch recording channel (optional; may be NULL) 2969 * @param song song name gets copied from here 2970 * 2971 * @retval EINVAL Operation not yet supported. 2972 */ 2973 static int 2974 dsp_oss_setsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song) 2975 { 2976 return (EINVAL); 2977 } 2978 2979 /** 2980 * @brief Rename a device 2981 * 2982 * This is a handler for the @c SNDCTL_SETNAME ioctl. 2983 * 2984 * See @c http://manuals.opensound.com/developer/SNDCTL_SETNAME.html for 2985 * more details. 2986 * 2987 * From Hannu@4Front: "This call is used to change the device name 2988 * reported in /dev/sndstat and ossinfo. So instead of using some generic 2989 * 'OSS loopback audio (MIDI) driver' the device may be given a meaningfull 2990 * name depending on the current context (for example 'OSS virtual wave table 2991 * synth' or 'VoIP link to London')." 2992 * 2993 * @note As the ioctl definition is still under construction, FreeBSD 2994 * does not currently support SNDCTL_SETNAME. 2995 * 2996 * @param wrch playback channel (optional; may be NULL) 2997 * @param rdch recording channel (optional; may be NULL) 2998 * @param name new device name gets copied from here 2999 * 3000 * @retval EINVAL Operation not yet supported. 3001 */ 3002 static int 3003 dsp_oss_setname(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *name) 3004 { 3005 return (EINVAL); 3006 } 3007 #endif /* !OSSV4_EXPERIMENT */ 3008