Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
FreeBSD/Linux Kernel Cross Reference
sys/dev/sound/pcm/dsp.c
Version:
- FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
SearchContext: - none - 3 - 10
1 /*- 2 * Copyright (c) 1999 Cameron Grant <cg@freebsd.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: src/sys/dev/sound/pcm/dsp.c,v 1.80.2.6 2006/04/04 17:43:48 ariff Exp $ 27 */ 28 29 #include <sys/param.h> 30 #include <sys/queue.h> 31 #include <sys/event.h> 32 33 #include <dev/sound/pcm/dsp.h> 34 #include <dev/sound/pcm/sound.h> 35 36 37 #define OLDPCM_IOCTL 38 39 static d_open_t dsp_open; 40 static d_close_t dsp_close; 41 static d_read_t dsp_read; 42 static d_write_t dsp_write; 43 static d_ioctl_t dsp_ioctl; 44 static d_kqfilter_t dsp_kqfilter; 45 static d_mmap_t dsp_mmap; 46 47 static void dsp_filter_detach(struct knote *); 48 static int dsp_filter_read(struct knote *, long); 49 static int dsp_filter_write(struct knote *, long); 50 51 struct dev_ops dsp_ops = { 52 { "dsp", 0, 0}, 53 /*.d_flags = D_NEEDGIANT,*/ 54 .d_open = dsp_open, 55 .d_close = dsp_close, 56 .d_read = dsp_read, 57 .d_write = dsp_write, 58 .d_ioctl = dsp_ioctl, 59 .d_kqfilter = dsp_kqfilter, 60 .d_mmap = dsp_mmap, 61 }; 62 63 struct snddev_info * 64 dsp_get_info(struct cdev *dev) 65 { 66 struct snddev_info *d; 67 int unit; 68 69 unit = PCMUNIT(dev); 70 if (unit >= devclass_get_maxunit(pcm_devclass)) 71 return NULL; 72 d = devclass_get_softc(pcm_devclass, unit); 73 74 return d; 75 } 76 77 static u_int32_t 78 dsp_get_flags(struct cdev *dev) 79 { 80 device_t bdev; 81 int unit; 82 83 unit = PCMUNIT(dev); 84 if (unit >= devclass_get_maxunit(pcm_devclass)) 85 return 0xffffffff; 86 bdev = devclass_get_device(pcm_devclass, unit); 87 88 return pcm_getflags(bdev); 89 } 90 91 static void 92 dsp_set_flags(struct cdev *dev, u_int32_t flags) 93 { 94 device_t bdev; 95 int unit; 96 97 unit = PCMUNIT(dev); 98 if (unit >= devclass_get_maxunit(pcm_devclass)) 99 return; 100 bdev = devclass_get_device(pcm_devclass, unit); 101 102 pcm_setflags(bdev, flags); 103 } 104 105 /* 106 * return the channels associated with an open device instance. 107 * set the priority if the device is simplex and one direction (only) is 108 * specified. 109 * lock channels specified. 110 */ 111 static int 112 getchns(struct cdev *dev, struct pcm_channel **rdch, struct pcm_channel **wrch, u_int32_t prio) 113 { 114 struct snddev_info *d; 115 u_int32_t flags; 116 117 flags = dsp_get_flags(dev); 118 d = dsp_get_info(dev); 119 pcm_inprog(d, 1); 120 pcm_lock(d); 121 KASSERT((flags & SD_F_PRIO_SET) != SD_F_PRIO_SET, \ 122 ("getchns: read and write both prioritised")); 123 124 if ((flags & SD_F_PRIO_SET) == 0 && (prio != (SD_F_PRIO_RD | SD_F_PRIO_WR))) { 125 flags |= prio & (SD_F_PRIO_RD | SD_F_PRIO_WR); 126 dsp_set_flags(dev, flags); 127 } 128 129 *rdch = dev->si_drv1; 130 *wrch = dev->si_drv2; 131 if ((flags & SD_F_SIMPLEX) && (flags & SD_F_PRIO_SET)) { 132 if (prio) { 133 if (*rdch && flags & SD_F_PRIO_WR) { 134 dev->si_drv1 = NULL; 135 *rdch = pcm_getfakechan(d); 136 } else if (*wrch && flags & SD_F_PRIO_RD) { 137 dev->si_drv2 = NULL; 138 *wrch = pcm_getfakechan(d); 139 } 140 } 141 142 pcm_getfakechan(d)->flags |= CHN_F_BUSY; 143 } 144 pcm_unlock(d); 145 146 if (*rdch && *rdch != pcm_getfakechan(d) && (prio & SD_F_PRIO_RD)) 147 CHN_LOCK(*rdch); 148 if (*wrch && *wrch != pcm_getfakechan(d) && (prio & SD_F_PRIO_WR)) 149 CHN_LOCK(*wrch); 150 151 return 0; 152 } 153 154 /* unlock specified channels */ 155 static void 156 relchns(struct cdev *dev, struct pcm_channel *rdch, struct pcm_channel *wrch, u_int32_t prio) 157 { 158 struct snddev_info *d; 159 160 d = dsp_get_info(dev); 161 if (wrch && wrch != pcm_getfakechan(d) && (prio & SD_F_PRIO_WR)) 162 CHN_UNLOCK(wrch); 163 if (rdch && rdch != pcm_getfakechan(d) && (prio & SD_F_PRIO_RD)) 164 CHN_UNLOCK(rdch); 165 pcm_inprog(d, -1); 166 } 167 168 static int 169 dsp_open(struct dev_open_args *ap) 170 { 171 struct cdev *i_dev = ap->a_head.a_dev; 172 struct thread *td = curthread; 173 int flags = ap->a_oflags; 174 struct pcm_channel *rdch, *wrch; 175 struct snddev_info *d = NULL; 176 struct snddev_channel *sce = NULL; 177 u_int32_t fmt = AFMT_U8; 178 int error; 179 int chnum; 180 181 if (i_dev == NULL) { 182 error = ENODEV; 183 goto out; 184 } 185 186 d = dsp_get_info(i_dev); 187 SLIST_FOREACH(sce, &d->channels, link) { 188 if (sce->dsp_dev == i_dev) 189 break; 190 } 191 192 if (sce == NULL) { 193 error = ENODEV; 194 goto out; 195 } 196 197 if (td == NULL) { 198 error = ENODEV; 199 goto out; 200 } 201 202 if ((flags & (FREAD | FWRITE)) == 0) { 203 error = EINVAL; 204 goto out; 205 } 206 207 chnum = PCMCHAN(i_dev); 208 209 /* lock snddev so nobody else can monkey with it */ 210 pcm_lock(d); 211 212 rdch = i_dev->si_drv1; 213 wrch = i_dev->si_drv2; 214 215 if (rdch || wrch || ((dsp_get_flags(i_dev) & SD_F_SIMPLEX) && 216 (flags & (FREAD | FWRITE)) == (FREAD | FWRITE))) { 217 /* simplex or not, better safe than sorry. */ 218 pcm_unlock(d); 219 error = EBUSY; 220 goto out; 221 } 222 223 /* 224 * if we get here, the open request is valid- either: 225 * * we were previously not open 226 * * we were open for play xor record and the opener wants 227 * the non-open direction 228 */ 229 if (flags & FREAD) { 230 /* open for read */ 231 pcm_unlock(d); 232 error = pcm_chnalloc(d, &rdch, PCMDIR_REC, td->td_proc->p_pid, chnum); 233 if (error != 0 && error != EBUSY && chnum != -1 && (flags & FWRITE)) 234 error = pcm_chnalloc(d, &rdch, PCMDIR_REC, td->td_proc->p_pid, -1); 235 236 if (error == 0 && (chn_reset(rdch, fmt) || 237 (fmt && chn_setspeed(rdch, DSP_DEFAULT_SPEED)))) 238 error = ENODEV; 239 240 if (error != 0) { 241 if (rdch) 242 pcm_chnrelease(rdch); 243 goto out; 244 } 245 246 pcm_chnref(rdch, 1); 247 CHN_UNLOCK(rdch); 248 pcm_lock(d); 249 } 250 251 if (flags & FWRITE) { 252 /* open for write */ 253 pcm_unlock(d); 254 error = pcm_chnalloc(d, &wrch, PCMDIR_PLAY, td->td_proc->p_pid, chnum); 255 if (error != 0 && error != EBUSY && chnum != -1 && (flags & FREAD)) 256 error = pcm_chnalloc(d, &wrch, PCMDIR_PLAY, td->td_proc->p_pid, -1); 257 258 if (error == 0 && (chn_reset(wrch, fmt) || 259 (fmt && chn_setspeed(wrch, DSP_DEFAULT_SPEED)))) 260 error = ENODEV; 261 262 if (error != 0) { 263 if (wrch) 264 pcm_chnrelease(wrch); 265 if (rdch) { 266 /* 267 * Lock, deref and release previously created record channel 268 */ 269 CHN_LOCK(rdch); 270 pcm_chnref(rdch, -1); 271 pcm_chnrelease(rdch); 272 } 273 274 goto out; 275 } 276 277 pcm_chnref(wrch, 1); 278 CHN_UNLOCK(wrch); 279 pcm_lock(d); 280 } 281 282 i_dev->si_drv1 = rdch; 283 i_dev->si_drv2 = wrch; 284 285 sce->open++; 286 287 pcm_unlock(d); 288 return 0; 289 290 out: 291 if (i_dev != NULL && sce != NULL && sce->open == 0) { 292 pcm_lock(d); 293 destroy_dev(i_dev); 294 sce->dsp_dev = NULL; 295 pcm_unlock(d); 296 } 297 return (error); 298 } 299 300 static int 301 dsp_close(struct dev_close_args *ap) 302 { 303 struct cdev *i_dev = ap->a_head.a_dev; 304 struct pcm_channel *rdch, *wrch; 305 struct snddev_info *d; 306 struct snddev_channel *sce = NULL; 307 int refs; 308 309 d = dsp_get_info(i_dev); 310 pcm_lock(d); 311 rdch = i_dev->si_drv1; 312 wrch = i_dev->si_drv2; 313 i_dev->si_drv1 = NULL; 314 i_dev->si_drv2 = NULL; 315 316 SLIST_FOREACH(sce, &d->channels, link) { 317 if (sce->dsp_dev == i_dev) 318 break; 319 } 320 sce->dsp_dev = NULL; 321 destroy_dev(i_dev); 322 323 pcm_unlock(d); 324 325 if (rdch || wrch) { 326 refs = 0; 327 if (rdch) { 328 CHN_LOCK(rdch); 329 refs += pcm_chnref(rdch, -1); 330 chn_abort(rdch); /* won't sleep */ 331 rdch->flags &= ~(CHN_F_RUNNING | CHN_F_MAPPED | CHN_F_DEAD); 332 chn_reset(rdch, 0); 333 pcm_chnrelease(rdch); 334 } 335 if (wrch) { 336 CHN_LOCK(wrch); 337 refs += pcm_chnref(wrch, -1); 338 /* 339 * XXX: Maybe the right behaviour is to abort on non_block. 340 * It seems that mplayer flushes the audio queue by quickly 341 * closing and re-opening. In FBSD, there's a long pause 342 * while the audio queue flushes that I presume isn't there in 343 * linux. 344 */ 345 chn_flush(wrch); /* may sleep */ 346 wrch->flags &= ~(CHN_F_RUNNING | CHN_F_MAPPED | CHN_F_DEAD); 347 chn_reset(wrch, 0); 348 pcm_chnrelease(wrch); 349 } 350 351 pcm_lock(d); 352 /* 353 * If there are no more references, release the channels. 354 */ 355 if (refs == 0) { 356 if (pcm_getfakechan(d)) 357 pcm_getfakechan(d)->flags = 0; 358 /* What is this?!? */ 359 dsp_set_flags(i_dev, dsp_get_flags(i_dev) & ~SD_F_TRANSIENT); 360 } 361 pcm_unlock(d); 362 } 363 return 0; 364 } 365 366 static int 367 dsp_read(struct dev_read_args *ap) 368 { 369 struct cdev *i_dev = ap->a_head.a_dev; 370 struct uio *buf = ap->a_uio; 371 int flag = ap->a_ioflag; 372 struct pcm_channel *rdch, *wrch; 373 int ret; 374 375 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD); 376 377 KASSERT(rdch, ("dsp_read: nonexistant channel")); 378 KASSERT(rdch->flags & CHN_F_BUSY, ("dsp_read: nonbusy channel")); 379 380 if (rdch->flags & (CHN_F_MAPPED | CHN_F_DEAD)) { 381 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD); 382 return EINVAL; 383 } 384 if (!(rdch->flags & CHN_F_RUNNING)) 385 rdch->flags |= CHN_F_RUNNING; 386 ret = chn_read(rdch, buf, flag); 387 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD); 388 389 return ret; 390 } 391 392 static int 393 dsp_write(struct dev_write_args *ap) 394 { 395 struct cdev *i_dev = ap->a_head.a_dev; 396 struct uio *buf = ap->a_uio; 397 int flag = ap->a_ioflag; 398 struct pcm_channel *rdch, *wrch; 399 int ret; 400 401 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_WR); 402 403 KASSERT(wrch, ("dsp_write: nonexistant channel")); 404 KASSERT(wrch->flags & CHN_F_BUSY, ("dsp_write: nonbusy channel")); 405 406 if (wrch->flags & (CHN_F_MAPPED | CHN_F_DEAD)) { 407 relchns(i_dev, rdch, wrch, SD_F_PRIO_WR); 408 return EINVAL; 409 } 410 if (!(wrch->flags & CHN_F_RUNNING)) 411 wrch->flags |= CHN_F_RUNNING; 412 ret = chn_write(wrch, buf, flag); 413 relchns(i_dev, rdch, wrch, SD_F_PRIO_WR); 414 415 return ret; 416 } 417 418 static int 419 dsp_ioctl(struct dev_ioctl_args *ap) 420 { 421 struct cdev *i_dev = ap->a_head.a_dev; 422 u_long cmd = ap->a_cmd; 423 caddr_t arg = ap->a_data; 424 struct pcm_channel *chn, *rdch, *wrch; 425 struct snddev_info *d; 426 int kill; 427 int ret = 0, *arg_i = (int *)arg, tmp; 428 429 d = dsp_get_info(i_dev); 430 getchns(i_dev, &rdch, &wrch, 0); 431 432 kill = 0; 433 if (wrch && (wrch->flags & CHN_F_DEAD)) 434 kill |= 1; 435 if (rdch && (rdch->flags & CHN_F_DEAD)) 436 kill |= 2; 437 if (kill == 3) { 438 relchns(i_dev, rdch, wrch, 0); 439 return EINVAL; 440 } 441 if (kill & 1) 442 wrch = NULL; 443 if (kill & 2) 444 rdch = NULL; 445 446 /* 447 * 4Front OSS specifies that dsp devices allow mixer controls to 448 * control PCM == their volume. 449 */ 450 if (IOCGROUP(cmd) == 'M') { 451 /* 452 * For now only set the channel volume for vchans, pass 453 * all others to the mixer. 454 */ 455 if (wrch != NULL && wrch->flags & CHN_F_VIRTUAL && 456 (cmd & 0xff) == SOUND_MIXER_PCM) { 457 if ((cmd & MIXER_WRITE(0)) == MIXER_WRITE(0)) { 458 int vol_raw = *(int *)arg; 459 int vol_left, vol_right; 460 461 vol_left = min(vol_raw & 0x00ff, 100); 462 vol_right = min((vol_raw & 0xff00) >> 8, 100); 463 ret = chn_setvolume(wrch, vol_left, vol_right); 464 } else { 465 *(int *)arg = wrch->volume; 466 } 467 } else { 468 ap->a_head.a_dev = d->mixer_dev; 469 ret = mixer_ioctl(ap); 470 } 471 472 relchns(i_dev, rdch, wrch, 0); 473 return ret; 474 } 475 476 switch(cmd) { 477 #ifdef OLDPCM_IOCTL 478 /* 479 * we start with the new ioctl interface. 480 */ 481 case AIONWRITE: /* how many bytes can write ? */ 482 if (wrch) { 483 CHN_LOCK(wrch); 484 /* 485 if (wrch && wrch->bufhard.dl) 486 while (chn_wrfeed(wrch) == 0); 487 */ 488 *arg_i = sndbuf_getfree(wrch->bufsoft); 489 CHN_UNLOCK(wrch); 490 } else { 491 *arg_i = 0; 492 ret = EINVAL; 493 } 494 break; 495 496 case AIOSSIZE: /* set the current blocksize */ 497 { 498 struct snd_size *p = (struct snd_size *)arg; 499 500 p->play_size = 0; 501 p->rec_size = 0; 502 if (wrch) { 503 CHN_LOCK(wrch); 504 chn_setblocksize(wrch, 2, p->play_size); 505 p->play_size = sndbuf_getblksz(wrch->bufsoft); 506 CHN_UNLOCK(wrch); 507 } 508 if (rdch) { 509 CHN_LOCK(rdch); 510 chn_setblocksize(rdch, 2, p->rec_size); 511 p->rec_size = sndbuf_getblksz(rdch->bufsoft); 512 CHN_UNLOCK(rdch); 513 } 514 } 515 break; 516 case AIOGSIZE: /* get the current blocksize */ 517 { 518 struct snd_size *p = (struct snd_size *)arg; 519 520 if (wrch) { 521 CHN_LOCK(wrch); 522 p->play_size = sndbuf_getblksz(wrch->bufsoft); 523 CHN_UNLOCK(wrch); 524 } 525 if (rdch) { 526 CHN_LOCK(rdch); 527 p->rec_size = sndbuf_getblksz(rdch->bufsoft); 528 CHN_UNLOCK(rdch); 529 } 530 } 531 break; 532 533 case AIOSFMT: 534 case AIOGFMT: 535 { 536 snd_chan_param *p = (snd_chan_param *)arg; 537 538 if (cmd == AIOSFMT && 539 ((p->play_format != 0 && p->play_rate == 0) || 540 (p->rec_format != 0 && p->rec_rate == 0))) { 541 ret = EINVAL; 542 break; 543 } 544 if (wrch) { 545 CHN_LOCK(wrch); 546 if (cmd == AIOSFMT && p->play_format != 0) { 547 chn_setformat(wrch, p->play_format); 548 chn_setspeed(wrch, p->play_rate); 549 } 550 p->play_rate = wrch->speed; 551 p->play_format = wrch->format; 552 CHN_UNLOCK(wrch); 553 } else { 554 p->play_rate = 0; 555 p->play_format = 0; 556 } 557 if (rdch) { 558 CHN_LOCK(rdch); 559 if (cmd == AIOSFMT && p->rec_format != 0) { 560 chn_setformat(rdch, p->rec_format); 561 chn_setspeed(rdch, p->rec_rate); 562 } 563 p->rec_rate = rdch->speed; 564 p->rec_format = rdch->format; 565 CHN_UNLOCK(rdch); 566 } else { 567 p->rec_rate = 0; 568 p->rec_format = 0; 569 } 570 } 571 break; 572 573 case AIOGCAP: /* get capabilities */ 574 { 575 snd_capabilities *p = (snd_capabilities *)arg; 576 struct pcmchan_caps *pcaps = NULL, *rcaps = NULL; 577 struct cdev *pdev; 578 579 if (rdch) { 580 CHN_LOCK(rdch); 581 rcaps = chn_getcaps(rdch); 582 } 583 if (wrch) { 584 CHN_LOCK(wrch); 585 pcaps = chn_getcaps(wrch); 586 } 587 p->rate_min = max(rcaps? rcaps->minspeed : 0, 588 pcaps? pcaps->minspeed : 0); 589 p->rate_max = min(rcaps? rcaps->maxspeed : 1000000, 590 pcaps? pcaps->maxspeed : 1000000); 591 p->bufsize = min(rdch? sndbuf_getsize(rdch->bufsoft) : 1000000, 592 wrch? sndbuf_getsize(wrch->bufsoft) : 1000000); 593 /* XXX bad on sb16 */ 594 p->formats = (rdch? chn_getformats(rdch) : 0xffffffff) & 595 (wrch? chn_getformats(wrch) : 0xffffffff); 596 if (rdch && wrch) 597 p->formats |= (dsp_get_flags(i_dev) & SD_F_SIMPLEX)? 0 : AFMT_FULLDUPLEX; 598 pdev = d->mixer_dev; 599 p->mixers = 1; /* default: one mixer */ 600 p->inputs = pdev->si_drv1? mix_getdevs(pdev->si_drv1) : 0; 601 p->left = p->right = 100; 602 if (rdch) 603 CHN_UNLOCK(rdch); 604 if (wrch) 605 CHN_UNLOCK(wrch); 606 } 607 break; 608 609 case AIOSTOP: 610 if (*arg_i == AIOSYNC_PLAY && wrch) { 611 CHN_LOCK(wrch); 612 *arg_i = chn_abort(wrch); 613 CHN_UNLOCK(wrch); 614 } else if (*arg_i == AIOSYNC_CAPTURE && rdch) { 615 CHN_LOCK(rdch); 616 *arg_i = chn_abort(rdch); 617 CHN_UNLOCK(rdch); 618 } else { 619 kprintf("AIOSTOP: bad channel 0x%x\n", *arg_i); 620 *arg_i = 0; 621 } 622 break; 623 624 case AIOSYNC: 625 kprintf("AIOSYNC chan 0x%03lx pos %lu unimplemented\n", 626 ((snd_sync_parm *)arg)->chan, ((snd_sync_parm *)arg)->pos); 627 break; 628 #endif 629 /* 630 * here follow the standard ioctls (filio.h etc.) 631 */ 632 case FIONREAD: /* get # bytes to read */ 633 if (rdch) { 634 CHN_LOCK(rdch); 635 /* if (rdch && rdch->bufhard.dl) 636 while (chn_rdfeed(rdch) == 0); 637 */ 638 *arg_i = sndbuf_getready(rdch->bufsoft); 639 CHN_UNLOCK(rdch); 640 } else { 641 *arg_i = 0; 642 ret = EINVAL; 643 } 644 break; 645 646 case FIOASYNC: /*set/clear async i/o */ 647 DEB( kprintf("FIOASYNC\n") ; ) 648 break; 649 650 case SNDCTL_DSP_NONBLOCK: 651 case FIONBIO: /* set/clear non-blocking i/o */ 652 if (rdch) { 653 CHN_LOCK(rdch); 654 if (*arg_i) 655 rdch->flags |= CHN_F_NBIO; 656 else 657 rdch->flags &= ~CHN_F_NBIO; 658 CHN_UNLOCK(rdch); 659 } 660 if (wrch) { 661 CHN_LOCK(wrch); 662 if (*arg_i) 663 wrch->flags |= CHN_F_NBIO; 664 else 665 wrch->flags &= ~CHN_F_NBIO; 666 CHN_UNLOCK(wrch); 667 } 668 break; 669 670 /* 671 * Finally, here is the linux-compatible ioctl interface 672 */ 673 #define THE_REAL_SNDCTL_DSP_GETBLKSIZE _IOWR('P', 4, int) 674 case THE_REAL_SNDCTL_DSP_GETBLKSIZE: 675 case SNDCTL_DSP_GETBLKSIZE: 676 chn = wrch ? wrch : rdch; 677 if (chn) { 678 CHN_LOCK(chn); 679 *arg_i = sndbuf_getblksz(chn->bufsoft); 680 CHN_UNLOCK(chn); 681 } else { 682 *arg_i = 0; 683 ret = EINVAL; 684 } 685 break ; 686 687 case SNDCTL_DSP_SETBLKSIZE: 688 RANGE(*arg_i, 16, 65536); 689 if (wrch) { 690 CHN_LOCK(wrch); 691 chn_setblocksize(wrch, 2, *arg_i); 692 CHN_UNLOCK(wrch); 693 } 694 if (rdch) { 695 CHN_LOCK(rdch); 696 chn_setblocksize(rdch, 2, *arg_i); 697 CHN_UNLOCK(rdch); 698 } 699 break; 700 701 case SNDCTL_DSP_RESET: 702 DEB(kprintf("dsp reset\n")); 703 if (wrch) { 704 CHN_LOCK(wrch); 705 chn_abort(wrch); 706 chn_resetbuf(wrch); 707 CHN_UNLOCK(wrch); 708 } 709 if (rdch) { 710 CHN_LOCK(rdch); 711 chn_abort(rdch); 712 chn_resetbuf(rdch); 713 CHN_UNLOCK(rdch); 714 } 715 break; 716 717 case SNDCTL_DSP_SYNC: 718 DEB(kprintf("dsp sync\n")); 719 /* chn_sync may sleep */ 720 if (wrch) { 721 CHN_LOCK(wrch); 722 chn_sync(wrch, sndbuf_getsize(wrch->bufsoft) - 4); 723 CHN_UNLOCK(wrch); 724 } 725 break; 726 727 case SNDCTL_DSP_SPEED: 728 /* chn_setspeed may sleep */ 729 tmp = 0; 730 if (wrch) { 731 CHN_LOCK(wrch); 732 ret = chn_setspeed(wrch, *arg_i); 733 tmp = wrch->speed; 734 CHN_UNLOCK(wrch); 735 } 736 if (rdch && ret == 0) { 737 CHN_LOCK(rdch); 738 ret = chn_setspeed(rdch, *arg_i); 739 if (tmp == 0) 740 tmp = rdch->speed; 741 CHN_UNLOCK(rdch); 742 } 743 *arg_i = tmp; 744 break; 745 746 case SOUND_PCM_READ_RATE: 747 chn = wrch ? wrch : rdch; 748 if (chn) { 749 CHN_LOCK(chn); 750 *arg_i = chn->speed; 751 CHN_UNLOCK(chn); 752 } else { 753 *arg_i = 0; 754 ret = EINVAL; 755 } 756 break; 757 758 case SNDCTL_DSP_STEREO: 759 tmp = -1; 760 *arg_i = (*arg_i)? AFMT_STEREO : 0; 761 if (wrch) { 762 CHN_LOCK(wrch); 763 ret = chn_setformat(wrch, (wrch->format & ~AFMT_STEREO) | *arg_i); 764 tmp = (wrch->format & AFMT_STEREO)? 1 : 0; 765 CHN_UNLOCK(wrch); 766 } 767 if (rdch && ret == 0) { 768 CHN_LOCK(rdch); 769 ret = chn_setformat(rdch, (rdch->format & ~AFMT_STEREO) | *arg_i); 770 if (tmp == -1) 771 tmp = (rdch->format & AFMT_STEREO)? 1 : 0; 772 CHN_UNLOCK(rdch); 773 } 774 *arg_i = tmp; 775 break; 776 777 case SOUND_PCM_WRITE_CHANNELS: 778 /* case SNDCTL_DSP_CHANNELS: ( == SOUND_PCM_WRITE_CHANNELS) */ 779 if (*arg_i != 0) { 780 tmp = 0; 781 *arg_i = (*arg_i != 1)? AFMT_STEREO : 0; 782 if (wrch) { 783 CHN_LOCK(wrch); 784 ret = chn_setformat(wrch, (wrch->format & ~AFMT_STEREO) | *arg_i); 785 tmp = (wrch->format & AFMT_STEREO)? 2 : 1; 786 CHN_UNLOCK(wrch); 787 } 788 if (rdch && ret == 0) { 789 CHN_LOCK(rdch); 790 ret = chn_setformat(rdch, (rdch->format & ~AFMT_STEREO) | *arg_i); 791 if (tmp == 0) 792 tmp = (rdch->format & AFMT_STEREO)? 2 : 1; 793 CHN_UNLOCK(rdch); 794 } 795 *arg_i = tmp; 796 } else { 797 chn = wrch ? wrch : rdch; 798 CHN_LOCK(chn); 799 *arg_i = (chn->format & AFMT_STEREO) ? 2 : 1; 800 CHN_UNLOCK(chn); 801 } 802 break; 803 804 case SOUND_PCM_READ_CHANNELS: 805 chn = wrch ? wrch : rdch; 806 if (chn) { 807 CHN_LOCK(chn); 808 *arg_i = (chn->format & AFMT_STEREO) ? 2 : 1; 809 CHN_UNLOCK(chn); 810 } else { 811 *arg_i = 0; 812 ret = EINVAL; 813 } 814 break; 815 816 case SNDCTL_DSP_GETFMTS: /* returns a mask of supported fmts */ 817 chn = wrch ? wrch : rdch; 818 if (chn) { 819 CHN_LOCK(chn); 820 *arg_i = chn_getformats(chn); 821 CHN_UNLOCK(chn); 822 } else { 823 *arg_i = 0; 824 ret = EINVAL; 825 } 826 break ; 827 828 case SNDCTL_DSP_SETFMT: /* sets _one_ format */ 829 if ((*arg_i != AFMT_QUERY)) { 830 tmp = 0; 831 if (wrch) { 832 CHN_LOCK(wrch); 833 ret = chn_setformat(wrch, (*arg_i) | (wrch->format & AFMT_STEREO)); 834 tmp = wrch->format & ~AFMT_STEREO; 835 CHN_UNLOCK(wrch); 836 } 837 if (rdch && ret == 0) { 838 CHN_LOCK(rdch); 839 ret = chn_setformat(rdch, (*arg_i) | (rdch->format & AFMT_STEREO)); 840 if (tmp == 0) 841 tmp = rdch->format & ~AFMT_STEREO; 842 CHN_UNLOCK(rdch); 843 } 844 *arg_i = tmp; 845 } else { 846 chn = wrch ? wrch : rdch; 847 CHN_LOCK(chn); 848 *arg_i = chn->format & ~AFMT_STEREO; 849 CHN_UNLOCK(chn); 850 } 851 break; 852 853 case SNDCTL_DSP_SETFRAGMENT: 854 DEB(kprintf("SNDCTL_DSP_SETFRAGMENT 0x%08x\n", *(int *)arg)); 855 { 856 u_int32_t fragln = (*arg_i) & 0x0000ffff; 857 u_int32_t maxfrags = ((*arg_i) & 0xffff0000) >> 16; 858 u_int32_t fragsz; 859 u_int32_t r_maxfrags, r_fragsz; 860 861 RANGE(fragln, 4, 16); 862 fragsz = 1 << fragln; 863 864 if (maxfrags == 0) 865 maxfrags = CHN_2NDBUFMAXSIZE / fragsz; 866 if (maxfrags < 2) 867 maxfrags = 2; 868 if (maxfrags * fragsz > CHN_2NDBUFMAXSIZE) 869 maxfrags = CHN_2NDBUFMAXSIZE / fragsz; 870 871 DEB(kprintf("SNDCTL_DSP_SETFRAGMENT %d frags, %d sz\n", maxfrags, fragsz)); 872 if (rdch) { 873 CHN_LOCK(rdch); 874 ret = chn_setblocksize(rdch, maxfrags, fragsz); 875 r_maxfrags = sndbuf_getblkcnt(rdch->bufsoft); 876 r_fragsz = sndbuf_getblksz(rdch->bufsoft); 877 CHN_UNLOCK(rdch); 878 } else { 879 r_maxfrags = maxfrags; 880 r_fragsz = fragsz; 881 } 882 if (wrch && ret == 0) { 883 CHN_LOCK(wrch); 884 ret = chn_setblocksize(wrch, maxfrags, fragsz); 885 maxfrags = sndbuf_getblkcnt(wrch->bufsoft); 886 fragsz = sndbuf_getblksz(wrch->bufsoft); 887 CHN_UNLOCK(wrch); 888 } else { /* use whatever came from the read channel */ 889 maxfrags = r_maxfrags; 890 fragsz = r_fragsz; 891 } 892 893 fragln = 0; 894 while (fragsz > 1) { 895 fragln++; 896 fragsz >>= 1; 897 } 898 *arg_i = (maxfrags << 16) | fragln; 899 } 900 break; 901 902 case SNDCTL_DSP_GETISPACE: 903 /* return the size of data available in the input queue */ 904 { 905 audio_buf_info *a = (audio_buf_info *)arg; 906 if (rdch) { 907 struct snd_dbuf *bs = rdch->bufsoft; 908 909 CHN_LOCK(rdch); 910 a->bytes = sndbuf_getready(bs); 911 a->fragments = a->bytes / sndbuf_getblksz(bs); 912 a->fragstotal = sndbuf_getblkcnt(bs); 913 a->fragsize = sndbuf_getblksz(bs); 914 CHN_UNLOCK(rdch); 915 } 916 } 917 break; 918 919 case SNDCTL_DSP_GETOSPACE: 920 /* return space available in the output queue */ 921 { 922 audio_buf_info *a = (audio_buf_info *)arg; 923 if (wrch) { 924 struct snd_dbuf *bs = wrch->bufsoft; 925 926 CHN_LOCK(wrch); 927 /* XXX abusive DMA update: chn_wrupdate(wrch); */ 928 a->bytes = sndbuf_getfree(bs); 929 a->fragments = a->bytes / sndbuf_getblksz(bs); 930 a->fragstotal = sndbuf_getblkcnt(bs); 931 a->fragsize = sndbuf_getblksz(bs); 932 CHN_UNLOCK(wrch); 933 } 934 } 935 break; 936 937 case SNDCTL_DSP_GETIPTR: 938 { 939 count_info *a = (count_info *)arg; 940 if (rdch) { 941 struct snd_dbuf *bs = rdch->bufsoft; 942 943 CHN_LOCK(rdch); 944 /* XXX abusive DMA update: chn_rdupdate(rdch); */ 945 a->bytes = sndbuf_gettotal(bs); 946 a->blocks = sndbuf_getblocks(bs) - rdch->blocks; 947 a->ptr = sndbuf_getreadyptr(bs); 948 rdch->blocks = sndbuf_getblocks(bs); 949 CHN_UNLOCK(rdch); 950 } else 951 ret = EINVAL; 952 } 953 break; 954 955 case SNDCTL_DSP_GETOPTR: 956 { 957 count_info *a = (count_info *)arg; 958 if (wrch) { 959 struct snd_dbuf *bs = wrch->bufsoft; 960 961 CHN_LOCK(wrch); 962 /* XXX abusive DMA update: chn_wrupdate(wrch); */ 963 a->bytes = sndbuf_gettotal(bs); 964 a->blocks = sndbuf_getblocks(bs) - wrch->blocks; 965 a->ptr = sndbuf_getreadyptr(bs); 966 wrch->blocks = sndbuf_getblocks(bs); 967 CHN_UNLOCK(wrch); 968 } else 969 ret = EINVAL; 970 } 971 break; 972 973 case SNDCTL_DSP_GETCAPS: 974 *arg_i = DSP_CAP_REALTIME | DSP_CAP_MMAP | DSP_CAP_TRIGGER; 975 if (rdch && wrch && !(dsp_get_flags(i_dev) & SD_F_SIMPLEX)) 976 *arg_i |= DSP_CAP_DUPLEX; 977 break; 978 979 case SOUND_PCM_READ_BITS: 980 chn = wrch ? wrch : rdch; 981 if (chn) { 982 CHN_LOCK(chn); 983 if (chn->format & AFMT_8BIT) 984 *arg_i = 8; 985 else if (chn->format & AFMT_16BIT) 986 *arg_i = 16; 987 else if (chn->format & AFMT_24BIT) 988 *arg_i = 24; 989 else if (chn->format & AFMT_32BIT) 990 *arg_i = 32; 991 else 992 ret = EINVAL; 993 CHN_UNLOCK(chn); 994 } else { 995 *arg_i = 0; 996 ret = EINVAL; 997 } 998 break; 999 1000 case SNDCTL_DSP_SETTRIGGER: 1001 if (rdch) { 1002 CHN_LOCK(rdch); 1003 rdch->flags &= ~(CHN_F_TRIGGERED | CHN_F_NOTRIGGER); 1004 if (*arg_i & PCM_ENABLE_INPUT) 1005 chn_start(rdch, 1); 1006 else 1007 rdch->flags |= CHN_F_NOTRIGGER; 1008 CHN_UNLOCK(rdch); 1009 } 1010 if (wrch) { 1011 CHN_LOCK(wrch); 1012 wrch->flags &= ~(CHN_F_TRIGGERED | CHN_F_NOTRIGGER); 1013 if (*arg_i & PCM_ENABLE_OUTPUT) 1014 chn_start(wrch, 1); 1015 else 1016 wrch->flags |= CHN_F_NOTRIGGER; 1017 CHN_UNLOCK(wrch); 1018 } 1019 break; 1020 1021 case SNDCTL_DSP_GETTRIGGER: 1022 *arg_i = 0; 1023 if (wrch) { 1024 CHN_LOCK(wrch); 1025 if (wrch->flags & CHN_F_TRIGGERED) 1026 *arg_i |= PCM_ENABLE_OUTPUT; 1027 CHN_UNLOCK(wrch); 1028 } 1029 if (rdch) { 1030 CHN_LOCK(rdch); 1031 if (rdch->flags & CHN_F_TRIGGERED) 1032 *arg_i |= PCM_ENABLE_INPUT; 1033 CHN_UNLOCK(rdch); 1034 } 1035 break; 1036 1037 case SNDCTL_DSP_GETODELAY: 1038 if (wrch) { 1039 struct snd_dbuf *b = wrch->bufhard; 1040 struct snd_dbuf *bs = wrch->bufsoft; 1041 1042 CHN_LOCK(wrch); 1043 /* XXX abusive DMA update: chn_wrupdate(wrch); */ 1044 *arg_i = sndbuf_getready(b) + sndbuf_getready(bs); 1045 CHN_UNLOCK(wrch); 1046 } else 1047 ret = EINVAL; 1048 break; 1049 1050 case SNDCTL_DSP_POST: 1051 if (wrch) { 1052 CHN_LOCK(wrch); 1053 wrch->flags &= ~CHN_F_NOTRIGGER; 1054 chn_start(wrch, 1); 1055 CHN_UNLOCK(wrch); 1056 } 1057 break; 1058 1059 case SNDCTL_DSP_SETDUPLEX: 1060 /* 1061 * switch to full-duplex mode if card is in half-duplex 1062 * mode and is able to work in full-duplex mode 1063 */ 1064 if (rdch && wrch && (dsp_get_flags(i_dev) & SD_F_SIMPLEX)) 1065 dsp_set_flags(i_dev, dsp_get_flags(i_dev)^SD_F_SIMPLEX); 1066 break; 1067 1068 case SNDCTL_DSP_MAPINBUF: 1069 case SNDCTL_DSP_MAPOUTBUF: 1070 case SNDCTL_DSP_SETSYNCRO: 1071 /* undocumented */ 1072 1073 case SNDCTL_DSP_SUBDIVIDE: 1074 case SOUND_PCM_WRITE_FILTER: 1075 case SOUND_PCM_READ_FILTER: 1076 /* dunno what these do, don't sound important */ 1077 1078 default: 1079 DEB(kprintf("default ioctl fn 0x%08lx fail\n", cmd)); 1080 ret = EINVAL; 1081 break; 1082 } 1083 relchns(i_dev, rdch, wrch, 0); 1084 return ret; 1085 } 1086 1087 static struct filterops dsp_read_filtops = 1088 { FILTEROP_ISFD, NULL, dsp_filter_detach, dsp_filter_read }; 1089 static struct filterops dsp_write_filtops = 1090 { FILTEROP_ISFD, NULL, dsp_filter_detach, dsp_filter_write }; 1091 1092 static int 1093 dsp_kqfilter(struct dev_kqfilter_args *ap) 1094 { 1095 struct knote *kn = ap->a_kn; 1096 struct klist *klist; 1097 struct cdev *i_dev = ap->a_head.a_dev; 1098 struct pcm_channel *wrch = NULL, *rdch = NULL; 1099 struct snd_dbuf *bs = NULL; 1100 1101 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 1102 1103 switch (kn->kn_filter) { 1104 case EVFILT_READ: 1105 if (rdch) { 1106 kn->kn_fop = &dsp_read_filtops; 1107 kn->kn_hook = (caddr_t)rdch; 1108 bs = rdch->bufsoft; 1109 ap->a_result = 0; 1110 } 1111 break; 1112 case EVFILT_WRITE: 1113 if (wrch) { 1114 kn->kn_fop = &dsp_write_filtops; 1115 kn->kn_hook = (caddr_t)wrch; 1116 bs = wrch->bufsoft; 1117 ap->a_result = 0; 1118 } 1119 break; 1120 default: 1121 ap->a_result = EOPNOTSUPP; 1122 break; 1123 } 1124 1125 if (ap->a_result == 0) { 1126 klist = &sndbuf_getkq(bs)->ki_note; 1127 knote_insert(klist, kn); 1128 } 1129 1130 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 1131 1132 return (0); 1133 } 1134 1135 static void 1136 dsp_filter_detach(struct knote *kn) 1137 { 1138 struct pcm_channel *ch = (struct pcm_channel *)kn->kn_hook; 1139 struct snd_dbuf *bs = ch->bufsoft; 1140 struct klist *klist; 1141 1142 CHN_LOCK(ch); 1143 klist = &sndbuf_getkq(bs)->ki_note; 1144 knote_remove(klist, kn); 1145 CHN_UNLOCK(ch); 1146 } 1147 1148 static int 1149 dsp_filter_read(struct knote *kn, long hint) 1150 { 1151 struct pcm_channel *rdch = (struct pcm_channel *)kn->kn_hook; 1152 struct thread *td = curthread; 1153 int ready; 1154 1155 CHN_LOCK(rdch); 1156 ready = chn_poll(rdch, 1, td); 1157 CHN_UNLOCK(rdch); 1158 1159 return (ready); 1160 } 1161 1162 static int 1163 dsp_filter_write(struct knote *kn, long hint) 1164 { 1165 struct pcm_channel *wrch = (struct pcm_channel *)kn->kn_hook; 1166 struct thread *td = curthread; 1167 int ready; 1168 1169 CHN_LOCK(wrch); 1170 ready = chn_poll(wrch, 1, td); 1171 CHN_UNLOCK(wrch); 1172 1173 return (ready); 1174 } 1175 1176 static int 1177 dsp_mmap(struct dev_mmap_args *ap) 1178 { 1179 struct cdev *i_dev = ap->a_head.a_dev; 1180 vm_offset_t offset = ap->a_offset; 1181 int nprot = ap->a_nprot; 1182 struct pcm_channel *wrch = NULL, *rdch = NULL, *c; 1183 1184 if (nprot & PROT_EXEC) 1185 return -1; 1186 1187 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 1188 #if 0 1189 /* 1190 * XXX the linux api uses the nprot to select read/write buffer 1191 * our vm system doesn't allow this, so force write buffer 1192 */ 1193 1194 if (wrch && (nprot & PROT_WRITE)) { 1195 c = wrch; 1196 } else if (rdch && (nprot & PROT_READ)) { 1197 c = rdch; 1198 } else { 1199 return -1; 1200 } 1201 #else 1202 c = wrch; 1203 #endif 1204 1205 if (c == NULL) { 1206 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 1207 return -1; 1208 } 1209 1210 if (offset >= sndbuf_getsize(c->bufsoft)) { 1211 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 1212 return -1; 1213 } 1214 1215 if (!(c->flags & CHN_F_MAPPED)) 1216 c->flags |= CHN_F_MAPPED; 1217 1218 ap->a_result = atop(vtophys(sndbuf_getbufofs(c->bufsoft, offset))); 1219 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 1220 1221 return (0); 1222 } 1223 1224 /* 1225 * for i = 0 to channels of device N 1226 * if dspN.i isn't busy and in the right dir, create a dev_t and return it 1227 */ 1228 int 1229 dsp_clone(struct dev_clone_args *ap) 1230 { 1231 struct cdev *i_dev = ap->a_head.a_dev; 1232 struct cdev *pdev; 1233 struct snddev_info *pcm_dev; 1234 struct snddev_channel *pcm_chan; 1235 struct pcm_channel *c; 1236 int err = EBUSY; 1237 int dir; 1238 1239 pcm_dev = dsp_get_info(i_dev); 1240 1241 if (pcm_dev == NULL) 1242 return (ENODEV); 1243 1244 dir = ap->a_mode & FWRITE ? PCMDIR_PLAY : PCMDIR_REC; 1245 1246 retry_chnalloc: 1247 SLIST_FOREACH(pcm_chan, &pcm_dev->channels, link) { 1248 c = pcm_chan->channel; 1249 CHN_LOCK(c); 1250 pdev = pcm_chan->dsp_dev; 1251 1252 /* 1253 * Make sure that the channel has not been assigned 1254 * to a device yet (and vice versa). 1255 * The direction has to match and the channel may not 1256 * be busy. 1257 * dsp_open will use exactly this channel number to 1258 * avoid (possible?) races between clone and open. 1259 */ 1260 if (pdev == NULL && c->direction == dir && 1261 !(c->flags & CHN_F_BUSY)) { 1262 CHN_UNLOCK(c); 1263 pcm_lock(pcm_dev); 1264 pcm_chan->dsp_dev = make_only_dev(&dsp_ops, 1265 PCMMKMINOR(PCMUNIT(i_dev), pcm_chan->chan_num), 1266 UID_ROOT, GID_WHEEL, 1267 0666, 1268 "%s.%d", 1269 devtoname(i_dev), 1270 pcm_chan->chan_num); 1271 pcm_unlock(pcm_dev); 1272 1273 ap->a_dev = pcm_chan->dsp_dev; 1274 return (0); 1275 } 1276 CHN_UNLOCK(c); 1277 1278 #if DEBUG 1279 if ((pdev != NULL) && (pdev->si_drv1 == NULL) && (pdev->si_drv2 == NULL)) { 1280 kprintf("%s: dangling device\n", devtoname(pdev)); 1281 } 1282 #endif 1283 } 1284 1285 /* no channel available, create vchannel */ 1286 if (dir == PCMDIR_PLAY && 1287 pcm_dev->vchancount > 0 && 1288 pcm_dev->vchancount < snd_maxautovchans && 1289 pcm_dev->devcount < PCMMAXCHAN) { 1290 err = pcm_setvchans(pcm_dev, pcm_dev->vchancount + 1); 1291 if (err == 0) 1292 goto retry_chnalloc; 1293 /* 1294 * If we can't use vchans, because the main output is 1295 * blocked for something else, we should not return 1296 * any vchan create error, but the more descriptive 1297 * EBUSY. 1298 * After all, the user didn't ask us to clone, but 1299 * only opened /dev/dsp. 1300 */ 1301 err = EBUSY; 1302 } 1303 1304 return (err); 1305 }
Cache object: 150bcf649ba7f65e22ff32c99995b23c
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]