1 /*- 2 * Copyright (c) 2005-2009 Ariff Abdullah <ariff@FreeBSD.org> 3 * Portions Copyright (c) Ryan Beasley <ryan.beasley@gmail.com> - GSoC 2006 4 * Copyright (c) 1999 Cameron Grant <cg@FreeBSD.org> 5 * Copyright (c) 1997 Luigi Rizzo 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #ifdef HAVE_KERNEL_OPTION_HEADERS 31 #include "opt_snd.h" 32 #endif 33 34 #include <dev/sound/pcm/sound.h> 35 #include <dev/sound/pcm/ac97.h> 36 #include <dev/sound/pcm/vchan.h> 37 #include <dev/sound/pcm/dsp.h> 38 #include <dev/sound/pcm/sndstat.h> 39 #include <dev/sound/version.h> 40 #include <sys/limits.h> 41 #include <sys/sysctl.h> 42 43 #include "feeder_if.h" 44 45 SND_DECLARE_FILE("$FreeBSD$"); 46 47 devclass_t pcm_devclass; 48 49 int pcm_veto_load = 1; 50 51 int snd_unit = -1; 52 TUNABLE_INT("hw.snd.default_unit", &snd_unit); 53 54 static int snd_unit_auto = 0; 55 TUNABLE_INT("hw.snd.default_auto", &snd_unit_auto); 56 SYSCTL_INT(_hw_snd, OID_AUTO, default_auto, CTLFLAG_RW, 57 &snd_unit_auto, 0, "assign default unit to a newly attached device"); 58 59 int snd_maxautovchans = 16; 60 /* XXX: a tunable implies that we may need more than one sound channel before 61 the system can change a sysctl (/etc/sysctl.conf), do we really need 62 this? */ 63 TUNABLE_INT("hw.snd.maxautovchans", &snd_maxautovchans); 64 65 SYSCTL_NODE(_hw, OID_AUTO, snd, CTLFLAG_RD, 0, "Sound driver"); 66 67 /* 68 * XXX I've had enough with people not telling proper version/arch 69 * while reporting problems, not after 387397913213th questions/requests. 70 */ 71 static char snd_driver_version[] = 72 __XSTRING(SND_DRV_VERSION)"/"MACHINE_ARCH; 73 SYSCTL_STRING(_hw_snd, OID_AUTO, version, CTLFLAG_RD, &snd_driver_version, 74 0, "driver version/arch"); 75 76 /** 77 * @brief Unit number allocator for syncgroup IDs 78 */ 79 struct unrhdr *pcmsg_unrhdr = NULL; 80 81 static int 82 sndstat_prepare_pcm(SNDSTAT_PREPARE_PCM_ARGS) 83 { 84 SNDSTAT_PREPARE_PCM_BEGIN(); 85 SNDSTAT_PREPARE_PCM_END(); 86 } 87 88 void * 89 snd_mtxcreate(const char *desc, const char *type) 90 { 91 struct mtx *m; 92 93 m = malloc(sizeof(*m), M_DEVBUF, M_WAITOK | M_ZERO); 94 mtx_init(m, desc, type, MTX_DEF); 95 return m; 96 } 97 98 void 99 snd_mtxfree(void *m) 100 { 101 struct mtx *mtx = m; 102 103 mtx_destroy(mtx); 104 free(mtx, M_DEVBUF); 105 } 106 107 void 108 snd_mtxassert(void *m) 109 { 110 #ifdef INVARIANTS 111 struct mtx *mtx = m; 112 113 mtx_assert(mtx, MA_OWNED); 114 #endif 115 } 116 117 int 118 snd_setup_intr(device_t dev, struct resource *res, int flags, driver_intr_t hand, void *param, void **cookiep) 119 { 120 struct snddev_info *d; 121 122 flags &= INTR_MPSAFE; 123 flags |= INTR_TYPE_AV; 124 d = device_get_softc(dev); 125 if (d != NULL && (flags & INTR_MPSAFE)) 126 d->flags |= SD_F_MPSAFE; 127 128 return bus_setup_intr(dev, res, flags, 129 #if __FreeBSD_version >= 700031 130 NULL, 131 #endif 132 hand, param, cookiep); 133 } 134 135 static void 136 pcm_clonereset(struct snddev_info *d) 137 { 138 int cmax; 139 140 PCM_BUSYASSERT(d); 141 142 cmax = d->playcount + d->reccount - 1; 143 if (d->pvchancount > 0) 144 cmax += max(d->pvchancount, snd_maxautovchans) - 1; 145 if (d->rvchancount > 0) 146 cmax += max(d->rvchancount, snd_maxautovchans) - 1; 147 if (cmax > PCMMAXCLONE) 148 cmax = PCMMAXCLONE; 149 (void)snd_clone_gc(d->clones); 150 (void)snd_clone_setmaxunit(d->clones, cmax); 151 } 152 153 int 154 pcm_setvchans(struct snddev_info *d, int direction, int newcnt, int num) 155 { 156 struct pcm_channel *c, *ch, *nch; 157 struct pcmchan_caps *caps; 158 int i, err, vcnt; 159 160 PCM_BUSYASSERT(d); 161 162 if ((direction == PCMDIR_PLAY && d->playcount < 1) || 163 (direction == PCMDIR_REC && d->reccount < 1)) 164 return (ENODEV); 165 166 if (!(d->flags & SD_F_AUTOVCHAN)) 167 return (EINVAL); 168 169 if (newcnt < 0 || newcnt > SND_MAXVCHANS) 170 return (E2BIG); 171 172 if (direction == PCMDIR_PLAY) 173 vcnt = d->pvchancount; 174 else if (direction == PCMDIR_REC) 175 vcnt = d->rvchancount; 176 else 177 return (EINVAL); 178 179 if (newcnt > vcnt) { 180 KASSERT(num == -1 || 181 (num >= 0 && num < SND_MAXVCHANS && (newcnt - 1) == vcnt), 182 ("bogus vchan_create() request num=%d newcnt=%d vcnt=%d", 183 num, newcnt, vcnt)); 184 /* add new vchans - find a parent channel first */ 185 ch = NULL; 186 CHN_FOREACH(c, d, channels.pcm) { 187 CHN_LOCK(c); 188 if (c->direction == direction && 189 ((c->flags & CHN_F_HAS_VCHAN) || (vcnt == 0 && 190 c->refcount < 1 && 191 !(c->flags & (CHN_F_BUSY | CHN_F_VIRTUAL))))) { 192 /* 193 * Reuse hw channel with vchans already 194 * created. 195 */ 196 if (c->flags & CHN_F_HAS_VCHAN) { 197 ch = c; 198 break; 199 } 200 /* 201 * No vchans ever created, look for 202 * channels with supported formats. 203 */ 204 caps = chn_getcaps(c); 205 if (caps == NULL) { 206 CHN_UNLOCK(c); 207 continue; 208 } 209 for (i = 0; caps->fmtlist[i] != 0; i++) { 210 if (caps->fmtlist[i] & AFMT_CONVERTIBLE) 211 break; 212 } 213 if (caps->fmtlist[i] != 0) { 214 ch = c; 215 break; 216 } 217 } 218 CHN_UNLOCK(c); 219 } 220 if (ch == NULL) 221 return (EBUSY); 222 ch->flags |= CHN_F_BUSY; 223 err = 0; 224 while (err == 0 && newcnt > vcnt) { 225 err = vchan_create(ch, num); 226 if (err == 0) 227 vcnt++; 228 else if (err == E2BIG && newcnt > vcnt) 229 device_printf(d->dev, 230 "%s: err=%d Maximum channel reached.\n", 231 __func__, err); 232 } 233 if (vcnt == 0) 234 ch->flags &= ~CHN_F_BUSY; 235 CHN_UNLOCK(ch); 236 if (err != 0) 237 return (err); 238 else 239 pcm_clonereset(d); 240 } else if (newcnt < vcnt) { 241 KASSERT(num == -1, 242 ("bogus vchan_destroy() request num=%d", num)); 243 CHN_FOREACH(c, d, channels.pcm) { 244 CHN_LOCK(c); 245 if (c->direction != direction || 246 CHN_EMPTY(c, children) || 247 !(c->flags & CHN_F_HAS_VCHAN)) { 248 CHN_UNLOCK(c); 249 continue; 250 } 251 CHN_FOREACH_SAFE(ch, c, nch, children) { 252 CHN_LOCK(ch); 253 if (vcnt == 1 && c->refcount > 0) { 254 CHN_UNLOCK(ch); 255 break; 256 } 257 if (!(ch->flags & CHN_F_BUSY) && 258 ch->refcount < 1) { 259 err = vchan_destroy(ch); 260 if (err == 0) 261 vcnt--; 262 } else 263 CHN_UNLOCK(ch); 264 if (vcnt == newcnt) 265 break; 266 } 267 CHN_UNLOCK(c); 268 break; 269 } 270 pcm_clonereset(d); 271 } 272 273 return (0); 274 } 275 276 /* return error status and a locked channel */ 277 int 278 pcm_chnalloc(struct snddev_info *d, struct pcm_channel **ch, int direction, 279 pid_t pid, char *comm, int devunit) 280 { 281 struct pcm_channel *c; 282 int err, vchancount, vchan_num; 283 284 KASSERT(d != NULL && ch != NULL && (devunit == -1 || 285 !(devunit & ~(SND_U_MASK | SND_D_MASK | SND_C_MASK))) && 286 (direction == PCMDIR_PLAY || direction == PCMDIR_REC), 287 ("%s(): invalid d=%p ch=%p direction=%d pid=%d devunit=%d", 288 __func__, d, ch, direction, pid, devunit)); 289 PCM_BUSYASSERT(d); 290 291 /* Double check again. */ 292 if (devunit != -1) { 293 switch (snd_unit2d(devunit)) { 294 case SND_DEV_DSPHW_PLAY: 295 case SND_DEV_DSPHW_VPLAY: 296 if (direction != PCMDIR_PLAY) 297 return (ENOTSUP); 298 break; 299 case SND_DEV_DSPHW_REC: 300 case SND_DEV_DSPHW_VREC: 301 if (direction != PCMDIR_REC) 302 return (ENOTSUP); 303 break; 304 default: 305 if (!(direction == PCMDIR_PLAY || 306 direction == PCMDIR_REC)) 307 return (ENOTSUP); 308 break; 309 } 310 } 311 312 *ch = NULL; 313 vchan_num = 0; 314 vchancount = (direction == PCMDIR_PLAY) ? d->pvchancount : 315 d->rvchancount; 316 317 retry_chnalloc: 318 err = ENOTSUP; 319 /* scan for a free channel */ 320 CHN_FOREACH(c, d, channels.pcm) { 321 CHN_LOCK(c); 322 if (devunit == -1 && c->direction == direction && 323 (c->flags & CHN_F_VIRTUAL)) { 324 if (vchancount < snd_maxautovchans && 325 vchan_num < CHN_CHAN(c)) { 326 CHN_UNLOCK(c); 327 goto vchan_alloc; 328 } 329 vchan_num++; 330 } 331 if (c->direction == direction && !(c->flags & CHN_F_BUSY) && 332 (devunit == -1 || devunit == -2 || c->unit == devunit)) { 333 c->flags |= CHN_F_BUSY; 334 c->pid = pid; 335 strlcpy(c->comm, (comm != NULL) ? comm : 336 CHN_COMM_UNKNOWN, sizeof(c->comm)); 337 *ch = c; 338 return (0); 339 } else if (c->unit == devunit) { 340 if (c->direction != direction) 341 err = ENOTSUP; 342 else if (c->flags & CHN_F_BUSY) 343 err = EBUSY; 344 else 345 err = EINVAL; 346 CHN_UNLOCK(c); 347 return (err); 348 } else if ((devunit == -1 || devunit == -2) && 349 c->direction == direction && (c->flags & CHN_F_BUSY)) 350 err = EBUSY; 351 CHN_UNLOCK(c); 352 } 353 354 if (devunit == -2) 355 return (err); 356 357 vchan_alloc: 358 /* no channel available */ 359 if (devunit == -1 || snd_unit2d(devunit) == SND_DEV_DSPHW_VPLAY || 360 snd_unit2d(devunit) == SND_DEV_DSPHW_VREC) { 361 if (!(vchancount > 0 && vchancount < snd_maxautovchans) && 362 (devunit == -1 || snd_unit2c(devunit) < snd_maxautovchans)) 363 return (err); 364 err = pcm_setvchans(d, direction, vchancount + 1, 365 (devunit == -1) ? -1 : snd_unit2c(devunit)); 366 if (err == 0) { 367 if (devunit == -1) 368 devunit = -2; 369 goto retry_chnalloc; 370 } 371 } 372 373 return (err); 374 } 375 376 /* release a locked channel and unlock it */ 377 int 378 pcm_chnrelease(struct pcm_channel *c) 379 { 380 PCM_BUSYASSERT(c->parentsnddev); 381 CHN_LOCKASSERT(c); 382 383 c->flags &= ~CHN_F_BUSY; 384 c->pid = -1; 385 strlcpy(c->comm, CHN_COMM_UNUSED, sizeof(c->comm)); 386 CHN_UNLOCK(c); 387 388 return (0); 389 } 390 391 int 392 pcm_chnref(struct pcm_channel *c, int ref) 393 { 394 PCM_BUSYASSERT(c->parentsnddev); 395 CHN_LOCKASSERT(c); 396 397 c->refcount += ref; 398 399 return (c->refcount); 400 } 401 402 int 403 pcm_inprog(struct snddev_info *d, int delta) 404 { 405 PCM_LOCKASSERT(d); 406 407 d->inprog += delta; 408 409 return (d->inprog); 410 } 411 412 static void 413 pcm_setmaxautovchans(struct snddev_info *d, int num) 414 { 415 PCM_BUSYASSERT(d); 416 417 if (num < 0) 418 return; 419 420 if (num >= 0 && d->pvchancount > num) 421 (void)pcm_setvchans(d, PCMDIR_PLAY, num, -1); 422 else if (num > 0 && d->pvchancount == 0) 423 (void)pcm_setvchans(d, PCMDIR_PLAY, 1, -1); 424 425 if (num >= 0 && d->rvchancount > num) 426 (void)pcm_setvchans(d, PCMDIR_REC, num, -1); 427 else if (num > 0 && d->rvchancount == 0) 428 (void)pcm_setvchans(d, PCMDIR_REC, 1, -1); 429 430 pcm_clonereset(d); 431 } 432 433 static int 434 sysctl_hw_snd_default_unit(SYSCTL_HANDLER_ARGS) 435 { 436 struct snddev_info *d; 437 int error, unit; 438 439 unit = snd_unit; 440 error = sysctl_handle_int(oidp, &unit, 0, req); 441 if (error == 0 && req->newptr != NULL) { 442 d = devclass_get_softc(pcm_devclass, unit); 443 if (!PCM_REGISTERED(d) || CHN_EMPTY(d, channels.pcm)) 444 return EINVAL; 445 snd_unit = unit; 446 } 447 return (error); 448 } 449 /* XXX: do we need a way to let the user change the default unit? */ 450 SYSCTL_PROC(_hw_snd, OID_AUTO, default_unit, CTLTYPE_INT | CTLFLAG_RW, 451 0, sizeof(int), sysctl_hw_snd_default_unit, "I", "default sound device"); 452 453 static int 454 sysctl_hw_snd_maxautovchans(SYSCTL_HANDLER_ARGS) 455 { 456 struct snddev_info *d; 457 int i, v, error; 458 459 v = snd_maxautovchans; 460 error = sysctl_handle_int(oidp, &v, 0, req); 461 if (error == 0 && req->newptr != NULL) { 462 if (v < 0) 463 v = 0; 464 if (v > SND_MAXVCHANS) 465 v = SND_MAXVCHANS; 466 snd_maxautovchans = v; 467 for (i = 0; pcm_devclass != NULL && 468 i < devclass_get_maxunit(pcm_devclass); i++) { 469 d = devclass_get_softc(pcm_devclass, i); 470 if (!PCM_REGISTERED(d)) 471 continue; 472 PCM_ACQUIRE_QUICK(d); 473 pcm_setmaxautovchans(d, v); 474 PCM_RELEASE_QUICK(d); 475 } 476 } 477 return (error); 478 } 479 SYSCTL_PROC(_hw_snd, OID_AUTO, maxautovchans, CTLTYPE_INT | CTLFLAG_RW, 480 0, sizeof(int), sysctl_hw_snd_maxautovchans, "I", "maximum virtual channel"); 481 482 struct pcm_channel * 483 pcm_chn_create(struct snddev_info *d, struct pcm_channel *parent, kobj_class_t cls, int dir, int num, void *devinfo) 484 { 485 struct pcm_channel *ch; 486 int direction, err, rpnum, *pnum, max; 487 int udc, device, chan; 488 char *dirs, *devname, buf[CHN_NAMELEN]; 489 490 PCM_BUSYASSERT(d); 491 PCM_LOCKASSERT(d); 492 KASSERT(num >= -1, ("invalid num=%d", num)); 493 494 495 switch (dir) { 496 case PCMDIR_PLAY: 497 dirs = "play"; 498 direction = PCMDIR_PLAY; 499 pnum = &d->playcount; 500 device = SND_DEV_DSPHW_PLAY; 501 max = SND_MAXHWCHAN; 502 break; 503 case PCMDIR_PLAY_VIRTUAL: 504 dirs = "virtual"; 505 direction = PCMDIR_PLAY; 506 pnum = &d->pvchancount; 507 device = SND_DEV_DSPHW_VPLAY; 508 max = SND_MAXVCHANS; 509 break; 510 case PCMDIR_REC: 511 dirs = "record"; 512 direction = PCMDIR_REC; 513 pnum = &d->reccount; 514 device = SND_DEV_DSPHW_REC; 515 max = SND_MAXHWCHAN; 516 break; 517 case PCMDIR_REC_VIRTUAL: 518 dirs = "virtual"; 519 direction = PCMDIR_REC; 520 pnum = &d->rvchancount; 521 device = SND_DEV_DSPHW_VREC; 522 max = SND_MAXVCHANS; 523 break; 524 default: 525 return (NULL); 526 } 527 528 chan = (num == -1) ? 0 : num; 529 530 if (*pnum >= max || chan >= max) 531 return (NULL); 532 533 rpnum = 0; 534 535 CHN_FOREACH(ch, d, channels.pcm) { 536 if (CHN_DEV(ch) != device) 537 continue; 538 if (chan == CHN_CHAN(ch)) { 539 if (num != -1) { 540 device_printf(d->dev, 541 "channel num=%d allocated!\n", chan); 542 return (NULL); 543 } 544 chan++; 545 if (chan >= max) { 546 device_printf(d->dev, 547 "chan=%d > %d\n", chan, max); 548 return (NULL); 549 } 550 } 551 rpnum++; 552 } 553 554 if (*pnum != rpnum) { 555 device_printf(d->dev, 556 "%s(): WARNING: pnum screwed : dirs=%s pnum=%d rpnum=%d\n", 557 __func__, dirs, *pnum, rpnum); 558 return (NULL); 559 } 560 561 udc = snd_mkunit(device_get_unit(d->dev), device, chan); 562 devname = dsp_unit2name(buf, sizeof(buf), udc); 563 564 if (devname == NULL) { 565 device_printf(d->dev, 566 "Failed to query device name udc=0x%08x\n", udc); 567 return (NULL); 568 } 569 570 PCM_UNLOCK(d); 571 ch = malloc(sizeof(*ch), M_DEVBUF, M_WAITOK | M_ZERO); 572 ch->methods = kobj_create(cls, M_DEVBUF, M_WAITOK | M_ZERO); 573 ch->unit = udc; 574 ch->pid = -1; 575 strlcpy(ch->comm, CHN_COMM_UNUSED, sizeof(ch->comm)); 576 ch->parentsnddev = d; 577 ch->parentchannel = parent; 578 ch->dev = d->dev; 579 ch->trigger = PCMTRIG_STOP; 580 snprintf(ch->name, sizeof(ch->name), "%s:%s:%s", 581 device_get_nameunit(ch->dev), dirs, devname); 582 583 err = chn_init(ch, devinfo, dir, direction); 584 PCM_LOCK(d); 585 if (err) { 586 device_printf(d->dev, "chn_init(%s) failed: err = %d\n", 587 ch->name, err); 588 kobj_delete(ch->methods, M_DEVBUF); 589 free(ch, M_DEVBUF); 590 return (NULL); 591 } 592 593 return (ch); 594 } 595 596 int 597 pcm_chn_destroy(struct pcm_channel *ch) 598 { 599 struct snddev_info *d; 600 int err; 601 602 d = ch->parentsnddev; 603 PCM_BUSYASSERT(d); 604 605 err = chn_kill(ch); 606 if (err) { 607 device_printf(ch->dev, "chn_kill(%s) failed, err = %d\n", 608 ch->name, err); 609 return (err); 610 } 611 612 kobj_delete(ch->methods, M_DEVBUF); 613 free(ch, M_DEVBUF); 614 615 return (0); 616 } 617 618 int 619 pcm_chn_add(struct snddev_info *d, struct pcm_channel *ch) 620 { 621 PCM_BUSYASSERT(d); 622 PCM_LOCKASSERT(d); 623 KASSERT(ch != NULL && (ch->direction == PCMDIR_PLAY || 624 ch->direction == PCMDIR_REC), ("Invalid pcm channel")); 625 626 CHN_INSERT_SORT_ASCEND(d, ch, channels.pcm); 627 628 switch (CHN_DEV(ch)) { 629 case SND_DEV_DSPHW_PLAY: 630 d->playcount++; 631 break; 632 case SND_DEV_DSPHW_VPLAY: 633 d->pvchancount++; 634 break; 635 case SND_DEV_DSPHW_REC: 636 d->reccount++; 637 break; 638 case SND_DEV_DSPHW_VREC: 639 d->rvchancount++; 640 break; 641 default: 642 break; 643 } 644 645 d->devcount++; 646 647 return (0); 648 } 649 650 int 651 pcm_chn_remove(struct snddev_info *d, struct pcm_channel *ch) 652 { 653 struct pcm_channel *tmp; 654 655 PCM_BUSYASSERT(d); 656 PCM_LOCKASSERT(d); 657 658 tmp = NULL; 659 660 CHN_FOREACH(tmp, d, channels.pcm) { 661 if (tmp == ch) 662 break; 663 } 664 665 if (tmp != ch) 666 return (EINVAL); 667 668 CHN_REMOVE(d, ch, channels.pcm); 669 670 switch (CHN_DEV(ch)) { 671 case SND_DEV_DSPHW_PLAY: 672 d->playcount--; 673 break; 674 case SND_DEV_DSPHW_VPLAY: 675 d->pvchancount--; 676 break; 677 case SND_DEV_DSPHW_REC: 678 d->reccount--; 679 break; 680 case SND_DEV_DSPHW_VREC: 681 d->rvchancount--; 682 break; 683 default: 684 break; 685 } 686 687 d->devcount--; 688 689 return (0); 690 } 691 692 int 693 pcm_addchan(device_t dev, int dir, kobj_class_t cls, void *devinfo) 694 { 695 struct snddev_info *d = device_get_softc(dev); 696 struct pcm_channel *ch; 697 int err; 698 699 PCM_BUSYASSERT(d); 700 701 PCM_LOCK(d); 702 ch = pcm_chn_create(d, NULL, cls, dir, -1, devinfo); 703 if (!ch) { 704 device_printf(d->dev, "pcm_chn_create(%s, %d, %p) failed\n", 705 cls->name, dir, devinfo); 706 PCM_UNLOCK(d); 707 return (ENODEV); 708 } 709 710 err = pcm_chn_add(d, ch); 711 PCM_UNLOCK(d); 712 if (err) { 713 device_printf(d->dev, "pcm_chn_add(%s) failed, err=%d\n", 714 ch->name, err); 715 pcm_chn_destroy(ch); 716 } 717 718 return (err); 719 } 720 721 static int 722 pcm_killchan(device_t dev) 723 { 724 struct snddev_info *d = device_get_softc(dev); 725 struct pcm_channel *ch; 726 int error; 727 728 PCM_BUSYASSERT(d); 729 730 ch = CHN_FIRST(d, channels.pcm); 731 732 PCM_LOCK(d); 733 error = pcm_chn_remove(d, ch); 734 PCM_UNLOCK(d); 735 if (error) 736 return (error); 737 return (pcm_chn_destroy(ch)); 738 } 739 740 int 741 pcm_setstatus(device_t dev, char *str) 742 { 743 struct snddev_info *d = device_get_softc(dev); 744 745 PCM_BUSYASSERT(d); 746 747 if (d->playcount == 0 || d->reccount == 0) 748 d->flags |= SD_F_SIMPLEX; 749 750 if ((d->playcount > 0 || d->reccount > 0) && 751 !(d->flags & SD_F_AUTOVCHAN)) { 752 d->flags |= SD_F_AUTOVCHAN; 753 vchan_initsys(dev); 754 } 755 756 pcm_setmaxautovchans(d, snd_maxautovchans); 757 758 strlcpy(d->status, str, SND_STATUSLEN); 759 760 PCM_LOCK(d); 761 762 /* Last stage, enable cloning. */ 763 if (d->clones != NULL) 764 (void)snd_clone_enable(d->clones); 765 766 /* Done, we're ready.. */ 767 d->flags |= SD_F_REGISTERED; 768 769 PCM_RELEASE(d); 770 771 PCM_UNLOCK(d); 772 773 if (snd_unit < 0 || snd_unit_auto != 0) 774 snd_unit = device_get_unit(dev); 775 776 return (0); 777 } 778 779 uint32_t 780 pcm_getflags(device_t dev) 781 { 782 struct snddev_info *d = device_get_softc(dev); 783 784 return d->flags; 785 } 786 787 void 788 pcm_setflags(device_t dev, uint32_t val) 789 { 790 struct snddev_info *d = device_get_softc(dev); 791 792 d->flags = val; 793 } 794 795 void * 796 pcm_getdevinfo(device_t dev) 797 { 798 struct snddev_info *d = device_get_softc(dev); 799 800 return d->devinfo; 801 } 802 803 unsigned int 804 pcm_getbuffersize(device_t dev, unsigned int minbufsz, unsigned int deflt, unsigned int maxbufsz) 805 { 806 struct snddev_info *d = device_get_softc(dev); 807 int sz, x; 808 809 sz = 0; 810 if (resource_int_value(device_get_name(dev), device_get_unit(dev), "buffersize", &sz) == 0) { 811 x = sz; 812 RANGE(sz, minbufsz, maxbufsz); 813 if (x != sz) 814 device_printf(dev, "'buffersize=%d' hint is out of range (%d-%d), using %d\n", x, minbufsz, maxbufsz, sz); 815 x = minbufsz; 816 while (x < sz) 817 x <<= 1; 818 if (x > sz) 819 x >>= 1; 820 if (x != sz) { 821 device_printf(dev, "'buffersize=%d' hint is not a power of 2, using %d\n", sz, x); 822 sz = x; 823 } 824 } else { 825 sz = deflt; 826 } 827 828 d->bufsz = sz; 829 830 return sz; 831 } 832 833 static int 834 sysctl_dev_pcm_bitperfect(SYSCTL_HANDLER_ARGS) 835 { 836 struct snddev_info *d; 837 int err, val; 838 839 d = oidp->oid_arg1; 840 if (!PCM_REGISTERED(d)) 841 return (ENODEV); 842 843 PCM_LOCK(d); 844 PCM_WAIT(d); 845 val = (d->flags & SD_F_BITPERFECT) ? 1 : 0; 846 PCM_ACQUIRE(d); 847 PCM_UNLOCK(d); 848 849 err = sysctl_handle_int(oidp, &val, 0, req); 850 851 if (err == 0 && req->newptr != NULL) { 852 if (!(val == 0 || val == 1)) { 853 PCM_RELEASE_QUICK(d); 854 return (EINVAL); 855 } 856 857 PCM_LOCK(d); 858 859 d->flags &= ~SD_F_BITPERFECT; 860 d->flags |= (val != 0) ? SD_F_BITPERFECT : 0; 861 862 PCM_RELEASE(d); 863 PCM_UNLOCK(d); 864 } else 865 PCM_RELEASE_QUICK(d); 866 867 return (err); 868 } 869 870 #ifdef SND_DEBUG 871 static int 872 sysctl_dev_pcm_clone_flags(SYSCTL_HANDLER_ARGS) 873 { 874 struct snddev_info *d; 875 uint32_t flags; 876 int err; 877 878 d = oidp->oid_arg1; 879 if (!PCM_REGISTERED(d) || d->clones == NULL) 880 return (ENODEV); 881 882 PCM_ACQUIRE_QUICK(d); 883 884 flags = snd_clone_getflags(d->clones); 885 err = sysctl_handle_int(oidp, &flags, 0, req); 886 887 if (err == 0 && req->newptr != NULL) { 888 if (flags & ~SND_CLONE_MASK) 889 err = EINVAL; 890 else 891 (void)snd_clone_setflags(d->clones, flags); 892 } 893 894 PCM_RELEASE_QUICK(d); 895 896 return (err); 897 } 898 899 static int 900 sysctl_dev_pcm_clone_deadline(SYSCTL_HANDLER_ARGS) 901 { 902 struct snddev_info *d; 903 int err, deadline; 904 905 d = oidp->oid_arg1; 906 if (!PCM_REGISTERED(d) || d->clones == NULL) 907 return (ENODEV); 908 909 PCM_ACQUIRE_QUICK(d); 910 911 deadline = snd_clone_getdeadline(d->clones); 912 err = sysctl_handle_int(oidp, &deadline, 0, req); 913 914 if (err == 0 && req->newptr != NULL) { 915 if (deadline < 0) 916 err = EINVAL; 917 else 918 (void)snd_clone_setdeadline(d->clones, deadline); 919 } 920 921 PCM_RELEASE_QUICK(d); 922 923 return (err); 924 } 925 926 static int 927 sysctl_dev_pcm_clone_gc(SYSCTL_HANDLER_ARGS) 928 { 929 struct snddev_info *d; 930 int err, val; 931 932 d = oidp->oid_arg1; 933 if (!PCM_REGISTERED(d) || d->clones == NULL) 934 return (ENODEV); 935 936 val = 0; 937 err = sysctl_handle_int(oidp, &val, 0, req); 938 939 if (err == 0 && req->newptr != NULL && val != 0) { 940 PCM_ACQUIRE_QUICK(d); 941 val = snd_clone_gc(d->clones); 942 PCM_RELEASE_QUICK(d); 943 if (bootverbose != 0 || snd_verbose > 3) 944 device_printf(d->dev, "clone gc: pruned=%d\n", val); 945 } 946 947 return (err); 948 } 949 950 static int 951 sysctl_hw_snd_clone_gc(SYSCTL_HANDLER_ARGS) 952 { 953 struct snddev_info *d; 954 int i, err, val; 955 956 val = 0; 957 err = sysctl_handle_int(oidp, &val, 0, req); 958 959 if (err == 0 && req->newptr != NULL && val != 0) { 960 for (i = 0; pcm_devclass != NULL && 961 i < devclass_get_maxunit(pcm_devclass); i++) { 962 d = devclass_get_softc(pcm_devclass, i); 963 if (!PCM_REGISTERED(d) || d->clones == NULL) 964 continue; 965 PCM_ACQUIRE_QUICK(d); 966 val = snd_clone_gc(d->clones); 967 PCM_RELEASE_QUICK(d); 968 if (bootverbose != 0 || snd_verbose > 3) 969 device_printf(d->dev, "clone gc: pruned=%d\n", 970 val); 971 } 972 } 973 974 return (err); 975 } 976 SYSCTL_PROC(_hw_snd, OID_AUTO, clone_gc, CTLTYPE_INT | CTLFLAG_RW, 977 0, sizeof(int), sysctl_hw_snd_clone_gc, "I", 978 "global clone garbage collector"); 979 #endif 980 981 int 982 pcm_register(device_t dev, void *devinfo, int numplay, int numrec) 983 { 984 struct snddev_info *d; 985 int i; 986 987 if (pcm_veto_load) { 988 device_printf(dev, "disabled due to an error while initialising: %d\n", pcm_veto_load); 989 990 return EINVAL; 991 } 992 993 if (device_get_unit(dev) > PCMMAXUNIT) { 994 device_printf(dev, "PCMMAXUNIT reached : unit=%d > %d\n", 995 device_get_unit(dev), PCMMAXUNIT); 996 device_printf(dev, 997 "Use 'hw.snd.maxunit' tunable to raise the limit.\n"); 998 return ENODEV; 999 } 1000 1001 d = device_get_softc(dev); 1002 d->dev = dev; 1003 d->lock = snd_mtxcreate(device_get_nameunit(dev), "sound cdev"); 1004 cv_init(&d->cv, device_get_nameunit(dev)); 1005 PCM_ACQUIRE_QUICK(d); 1006 dsp_cdevinfo_init(d); 1007 #if 0 1008 /* 1009 * d->flags should be cleared by the allocator of the softc. 1010 * We cannot clear this field here because several devices set 1011 * this flag before calling pcm_register(). 1012 */ 1013 d->flags = 0; 1014 #endif 1015 i = 0; 1016 if (resource_int_value(device_get_name(dev), device_get_unit(dev), 1017 "vpc", &i) != 0 || i != 0) 1018 d->flags |= SD_F_VPC; 1019 1020 if (resource_int_value(device_get_name(dev), device_get_unit(dev), 1021 "bitperfect", &i) == 0 && i != 0) 1022 d->flags |= SD_F_BITPERFECT; 1023 1024 d->devinfo = devinfo; 1025 d->devcount = 0; 1026 d->reccount = 0; 1027 d->playcount = 0; 1028 d->pvchancount = 0; 1029 d->rvchancount = 0; 1030 d->pvchanrate = 0; 1031 d->pvchanformat = 0; 1032 d->rvchanrate = 0; 1033 d->rvchanformat = 0; 1034 d->inprog = 0; 1035 1036 /* 1037 * Create clone manager, disabled by default. Cloning will be 1038 * enabled during final stage of driver initialization through 1039 * pcm_setstatus(). 1040 */ 1041 d->clones = snd_clone_create(SND_U_MASK | SND_D_MASK, PCMMAXCLONE, 1042 SND_CLONE_DEADLINE_DEFAULT, SND_CLONE_WAITOK | 1043 SND_CLONE_GC_ENABLE | SND_CLONE_GC_UNREF | 1044 SND_CLONE_GC_LASTREF | SND_CLONE_GC_EXPIRED); 1045 1046 if (bootverbose != 0 || snd_verbose > 3) { 1047 device_printf(dev, 1048 "clone manager: deadline=%dms flags=0x%08x\n", 1049 snd_clone_getdeadline(d->clones), 1050 snd_clone_getflags(d->clones)); 1051 } 1052 1053 CHN_INIT(d, channels.pcm); 1054 CHN_INIT(d, channels.pcm.busy); 1055 CHN_INIT(d, channels.pcm.opened); 1056 1057 /* XXX This is incorrect, but lets play along for now. */ 1058 if ((numplay == 0 || numrec == 0) && numplay != numrec) 1059 d->flags |= SD_F_SIMPLEX; 1060 1061 sysctl_ctx_init(&d->play_sysctl_ctx); 1062 d->play_sysctl_tree = SYSCTL_ADD_NODE(&d->play_sysctl_ctx, 1063 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, "play", 1064 CTLFLAG_RD, 0, "playback channels node"); 1065 sysctl_ctx_init(&d->rec_sysctl_ctx); 1066 d->rec_sysctl_tree = SYSCTL_ADD_NODE(&d->rec_sysctl_ctx, 1067 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, "rec", 1068 CTLFLAG_RD, 0, "record channels node"); 1069 /* XXX: an user should be able to set this with a control tool, the 1070 sysadmin then needs min+max sysctls for this */ 1071 SYSCTL_ADD_UINT(device_get_sysctl_ctx(dev), 1072 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), 1073 OID_AUTO, "buffersize", CTLFLAG_RD, &d->bufsz, 0, "allocated buffer size"); 1074 SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev), 1075 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, 1076 "bitperfect", CTLTYPE_INT | CTLFLAG_RW, d, sizeof(d), 1077 sysctl_dev_pcm_bitperfect, "I", 1078 "bit-perfect playback/recording (0=disable, 1=enable)"); 1079 #ifdef SND_DEBUG 1080 SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev), 1081 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, 1082 "clone_flags", CTLTYPE_UINT | CTLFLAG_RW, d, sizeof(d), 1083 sysctl_dev_pcm_clone_flags, "IU", 1084 "clone flags"); 1085 SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev), 1086 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, 1087 "clone_deadline", CTLTYPE_INT | CTLFLAG_RW, d, sizeof(d), 1088 sysctl_dev_pcm_clone_deadline, "I", 1089 "clone expiration deadline (ms)"); 1090 SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev), 1091 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, 1092 "clone_gc", CTLTYPE_INT | CTLFLAG_RW, d, sizeof(d), 1093 sysctl_dev_pcm_clone_gc, "I", 1094 "clone garbage collector"); 1095 #endif 1096 1097 if (numplay > 0 || numrec > 0) { 1098 d->flags |= SD_F_AUTOVCHAN; 1099 vchan_initsys(dev); 1100 } 1101 1102 if (d->flags & SD_F_EQ) 1103 feeder_eq_initsys(dev); 1104 1105 sndstat_register(dev, d->status, sndstat_prepare_pcm); 1106 1107 return 0; 1108 } 1109 1110 int 1111 pcm_unregister(device_t dev) 1112 { 1113 struct snddev_info *d; 1114 struct pcm_channel *ch; 1115 struct thread *td; 1116 int i; 1117 1118 td = curthread; 1119 d = device_get_softc(dev); 1120 1121 if (!PCM_ALIVE(d)) { 1122 device_printf(dev, "unregister: device not configured\n"); 1123 return (0); 1124 } 1125 1126 if (sndstat_acquire(td) != 0) { 1127 device_printf(dev, "unregister: sndstat busy\n"); 1128 return (EBUSY); 1129 } 1130 1131 PCM_LOCK(d); 1132 PCM_WAIT(d); 1133 1134 if (d->inprog != 0) { 1135 device_printf(dev, "unregister: operation in progress\n"); 1136 PCM_UNLOCK(d); 1137 sndstat_release(td); 1138 return (EBUSY); 1139 } 1140 1141 PCM_ACQUIRE(d); 1142 PCM_UNLOCK(d); 1143 1144 CHN_FOREACH(ch, d, channels.pcm) { 1145 CHN_LOCK(ch); 1146 if (ch->refcount > 0) { 1147 device_printf(dev, 1148 "unregister: channel %s busy (pid %d)\n", 1149 ch->name, ch->pid); 1150 CHN_UNLOCK(ch); 1151 PCM_RELEASE_QUICK(d); 1152 sndstat_release(td); 1153 return (EBUSY); 1154 } 1155 CHN_UNLOCK(ch); 1156 } 1157 1158 if (d->clones != NULL) { 1159 if (snd_clone_busy(d->clones) != 0) { 1160 device_printf(dev, "unregister: clone busy\n"); 1161 PCM_RELEASE_QUICK(d); 1162 sndstat_release(td); 1163 return (EBUSY); 1164 } else { 1165 PCM_LOCK(d); 1166 (void)snd_clone_disable(d->clones); 1167 PCM_UNLOCK(d); 1168 } 1169 } 1170 1171 if (mixer_uninit(dev) == EBUSY) { 1172 device_printf(dev, "unregister: mixer busy\n"); 1173 PCM_LOCK(d); 1174 if (d->clones != NULL) 1175 (void)snd_clone_enable(d->clones); 1176 PCM_RELEASE(d); 1177 PCM_UNLOCK(d); 1178 sndstat_release(td); 1179 return (EBUSY); 1180 } 1181 1182 PCM_LOCK(d); 1183 d->flags |= SD_F_DYING; 1184 d->flags &= ~SD_F_REGISTERED; 1185 PCM_UNLOCK(d); 1186 1187 /* 1188 * No lock being held, so this thing can be flushed without 1189 * stucking into devdrn oblivion. 1190 */ 1191 if (d->clones != NULL) { 1192 snd_clone_destroy(d->clones); 1193 d->clones = NULL; 1194 } 1195 1196 if (d->play_sysctl_tree != NULL) { 1197 sysctl_ctx_free(&d->play_sysctl_ctx); 1198 d->play_sysctl_tree = NULL; 1199 } 1200 if (d->rec_sysctl_tree != NULL) { 1201 sysctl_ctx_free(&d->rec_sysctl_ctx); 1202 d->rec_sysctl_tree = NULL; 1203 } 1204 1205 while (!CHN_EMPTY(d, channels.pcm)) 1206 pcm_killchan(dev); 1207 1208 dsp_cdevinfo_flush(d); 1209 1210 PCM_LOCK(d); 1211 PCM_RELEASE(d); 1212 cv_destroy(&d->cv); 1213 PCM_UNLOCK(d); 1214 snd_mtxfree(d->lock); 1215 sndstat_unregister(dev); 1216 sndstat_release(td); 1217 1218 if (snd_unit == device_get_unit(dev)) { 1219 /* 1220 * Reassign default unit to the next available dev, but 1221 * first, reset snd_unit to something ridiculous. 1222 */ 1223 snd_unit = -1; 1224 for (i = 0; pcm_devclass != NULL && 1225 i < devclass_get_maxunit(pcm_devclass); i++) { 1226 if (device_get_unit(dev) == i) 1227 continue; 1228 d = devclass_get_softc(pcm_devclass, i); 1229 if (PCM_REGISTERED(d)) { 1230 snd_unit = i; 1231 break; 1232 } 1233 } 1234 } 1235 1236 return (0); 1237 } 1238 1239 /************************************************************************/ 1240 1241 /** 1242 * @brief Handle OSSv4 SNDCTL_SYSINFO ioctl. 1243 * 1244 * @param si Pointer to oss_sysinfo struct where information about the 1245 * sound subsystem will be written/copied. 1246 * 1247 * This routine returns information about the sound system, such as the 1248 * current OSS version, number of audio, MIDI, and mixer drivers, etc. 1249 * Also includes a bitmask showing which of the above types of devices 1250 * are open (busy). 1251 * 1252 * @note 1253 * Calling threads must not hold any snddev_info or pcm_channel locks. 1254 * 1255 * @author Ryan Beasley <ryanb@FreeBSD.org> 1256 */ 1257 void 1258 sound_oss_sysinfo(oss_sysinfo *si) 1259 { 1260 static char si_product[] = "FreeBSD native OSS ABI"; 1261 static char si_version[] = __XSTRING(__FreeBSD_version); 1262 static char si_license[] = "BSD"; 1263 static int intnbits = sizeof(int) * 8; /* Better suited as macro? 1264 Must pester a C guru. */ 1265 1266 struct snddev_info *d; 1267 struct pcm_channel *c; 1268 int i, j, ncards; 1269 1270 ncards = 0; 1271 1272 strlcpy(si->product, si_product, sizeof(si->product)); 1273 strlcpy(si->version, si_version, sizeof(si->version)); 1274 si->versionnum = SOUND_VERSION; 1275 strlcpy(si->license, si_license, sizeof(si->license)); 1276 1277 /* 1278 * Iterate over PCM devices and their channels, gathering up data 1279 * for the numaudios, ncards, and openedaudio fields. 1280 */ 1281 si->numaudios = 0; 1282 bzero((void *)&si->openedaudio, sizeof(si->openedaudio)); 1283 1284 j = 0; 1285 1286 for (i = 0; pcm_devclass != NULL && 1287 i < devclass_get_maxunit(pcm_devclass); i++) { 1288 d = devclass_get_softc(pcm_devclass, i); 1289 if (!PCM_REGISTERED(d)) 1290 continue; 1291 1292 /* XXX Need Giant magic entry ??? */ 1293 1294 /* See note in function's docblock */ 1295 PCM_UNLOCKASSERT(d); 1296 PCM_LOCK(d); 1297 1298 si->numaudios += d->devcount; 1299 ++ncards; 1300 1301 CHN_FOREACH(c, d, channels.pcm) { 1302 CHN_UNLOCKASSERT(c); 1303 CHN_LOCK(c); 1304 if (c->flags & CHN_F_BUSY) 1305 si->openedaudio[j / intnbits] |= 1306 (1 << (j % intnbits)); 1307 CHN_UNLOCK(c); 1308 j++; 1309 } 1310 1311 PCM_UNLOCK(d); 1312 } 1313 si->numaudioengines = si->numaudios; 1314 1315 si->numsynths = 0; /* OSSv4 docs: this field is obsolete */ 1316 /** 1317 * @todo Collect num{midis,timers}. 1318 * 1319 * Need access to sound/midi/midi.c::midistat_lock in order 1320 * to safely touch midi_devices and get a head count of, well, 1321 * MIDI devices. midistat_lock is a global static (i.e., local to 1322 * midi.c), but midi_devices is a regular global; should the mutex 1323 * be publicized, or is there another way to get this information? 1324 * 1325 * NB: MIDI/sequencer stuff is currently on hold. 1326 */ 1327 si->nummidis = 0; 1328 si->numtimers = 0; 1329 si->nummixers = mixer_count; 1330 si->numcards = ncards; 1331 /* OSSv4 docs: Intended only for test apps; API doesn't 1332 really have much of a concept of cards. Shouldn't be 1333 used by applications. */ 1334 1335 /** 1336 * @todo Fill in "busy devices" fields. 1337 * 1338 * si->openedmidi = " MIDI devices 1339 */ 1340 bzero((void *)&si->openedmidi, sizeof(si->openedmidi)); 1341 1342 /* 1343 * Si->filler is a reserved array, but according to docs each 1344 * element should be set to -1. 1345 */ 1346 for (i = 0; i < sizeof(si->filler)/sizeof(si->filler[0]); i++) 1347 si->filler[i] = -1; 1348 } 1349 1350 int 1351 sound_oss_card_info(oss_card_info *si) 1352 { 1353 struct snddev_info *d; 1354 int i, ncards; 1355 1356 ncards = 0; 1357 1358 for (i = 0; pcm_devclass != NULL && 1359 i < devclass_get_maxunit(pcm_devclass); i++) { 1360 d = devclass_get_softc(pcm_devclass, i); 1361 if (!PCM_REGISTERED(d)) 1362 continue; 1363 1364 if (ncards++ != si->card) 1365 continue; 1366 1367 PCM_UNLOCKASSERT(d); 1368 PCM_LOCK(d); 1369 1370 strlcpy(si->shortname, device_get_nameunit(d->dev), 1371 sizeof(si->shortname)); 1372 strlcpy(si->longname, device_get_desc(d->dev), 1373 sizeof(si->longname)); 1374 strlcpy(si->hw_info, d->status, sizeof(si->hw_info)); 1375 si->intr_count = si->ack_count = 0; 1376 1377 PCM_UNLOCK(d); 1378 1379 return (0); 1380 } 1381 return (ENXIO); 1382 } 1383 1384 /************************************************************************/ 1385 1386 static int 1387 sound_modevent(module_t mod, int type, void *data) 1388 { 1389 int ret; 1390 #if 0 1391 return (midi_modevent(mod, type, data)); 1392 #else 1393 ret = 0; 1394 1395 switch(type) { 1396 case MOD_LOAD: 1397 pcmsg_unrhdr = new_unrhdr(1, INT_MAX, NULL); 1398 break; 1399 case MOD_UNLOAD: 1400 case MOD_SHUTDOWN: 1401 ret = sndstat_acquire(curthread); 1402 if (ret != 0) 1403 break; 1404 if (pcmsg_unrhdr != NULL) { 1405 delete_unrhdr(pcmsg_unrhdr); 1406 pcmsg_unrhdr = NULL; 1407 } 1408 break; 1409 default: 1410 ret = ENOTSUP; 1411 } 1412 1413 return ret; 1414 #endif 1415 } 1416 1417 DEV_MODULE(sound, sound_modevent, NULL); 1418 MODULE_VERSION(sound, SOUND_MODVER); 1419