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 = -1; 55 SYSCTL_INT(_hw_snd, OID_AUTO, default_auto, CTLFLAG_RWTUN, 56 &snd_unit_auto, 0, "assign default unit to a newly attached device"); 57 58 int snd_maxautovchans = 16; 59 /* XXX: a tunable implies that we may need more than one sound channel before 60 the system can change a sysctl (/etc/sysctl.conf), do we really need 61 this? */ 62 TUNABLE_INT("hw.snd.maxautovchans", &snd_maxautovchans); 63 64 SYSCTL_NODE(_hw, OID_AUTO, snd, CTLFLAG_RD, 0, "Sound driver"); 65 66 /* 67 * XXX I've had enough with people not telling proper version/arch 68 * while reporting problems, not after 387397913213th questions/requests. 69 */ 70 static char snd_driver_version[] = 71 __XSTRING(SND_DRV_VERSION)"/"MACHINE_ARCH; 72 SYSCTL_STRING(_hw_snd, OID_AUTO, version, CTLFLAG_RD, &snd_driver_version, 73 0, "driver version/arch"); 74 75 /** 76 * @brief Unit number allocator for syncgroup IDs 77 */ 78 struct unrhdr *pcmsg_unrhdr = NULL; 79 80 static int 81 sndstat_prepare_pcm(SNDSTAT_PREPARE_PCM_ARGS) 82 { 83 SNDSTAT_PREPARE_PCM_BEGIN(); 84 SNDSTAT_PREPARE_PCM_END(); 85 } 86 87 void * 88 snd_mtxcreate(const char *desc, const char *type) 89 { 90 struct mtx *m; 91 92 m = malloc(sizeof(*m), M_DEVBUF, M_WAITOK | M_ZERO); 93 mtx_init(m, desc, type, MTX_DEF); 94 return m; 95 } 96 97 void 98 snd_mtxfree(void *m) 99 { 100 struct mtx *mtx = m; 101 102 mtx_destroy(mtx); 103 free(mtx, M_DEVBUF); 104 } 105 106 void 107 snd_mtxassert(void *m) 108 { 109 #ifdef INVARIANTS 110 struct mtx *mtx = m; 111 112 mtx_assert(mtx, MA_OWNED); 113 #endif 114 } 115 116 int 117 snd_setup_intr(device_t dev, struct resource *res, int flags, driver_intr_t hand, void *param, void **cookiep) 118 { 119 struct snddev_info *d; 120 121 flags &= INTR_MPSAFE; 122 flags |= INTR_TYPE_AV; 123 d = device_get_softc(dev); 124 if (d != NULL && (flags & INTR_MPSAFE)) 125 d->flags |= SD_F_MPSAFE; 126 127 return bus_setup_intr(dev, res, flags, NULL, hand, param, cookiep); 128 } 129 130 static void 131 pcm_clonereset(struct snddev_info *d) 132 { 133 int cmax; 134 135 PCM_BUSYASSERT(d); 136 137 cmax = d->playcount + d->reccount - 1; 138 if (d->pvchancount > 0) 139 cmax += max(d->pvchancount, snd_maxautovchans) - 1; 140 if (d->rvchancount > 0) 141 cmax += max(d->rvchancount, snd_maxautovchans) - 1; 142 if (cmax > PCMMAXCLONE) 143 cmax = PCMMAXCLONE; 144 (void)snd_clone_gc(d->clones); 145 (void)snd_clone_setmaxunit(d->clones, cmax); 146 } 147 148 int 149 pcm_setvchans(struct snddev_info *d, int direction, int newcnt, int num) 150 { 151 struct pcm_channel *c, *ch, *nch; 152 struct pcmchan_caps *caps; 153 int i, err, vcnt; 154 155 PCM_BUSYASSERT(d); 156 157 if ((direction == PCMDIR_PLAY && d->playcount < 1) || 158 (direction == PCMDIR_REC && d->reccount < 1)) 159 return (ENODEV); 160 161 if (!(d->flags & SD_F_AUTOVCHAN)) 162 return (EINVAL); 163 164 if (newcnt < 0 || newcnt > SND_MAXVCHANS) 165 return (E2BIG); 166 167 if (direction == PCMDIR_PLAY) 168 vcnt = d->pvchancount; 169 else if (direction == PCMDIR_REC) 170 vcnt = d->rvchancount; 171 else 172 return (EINVAL); 173 174 if (newcnt > vcnt) { 175 KASSERT(num == -1 || 176 (num >= 0 && num < SND_MAXVCHANS && (newcnt - 1) == vcnt), 177 ("bogus vchan_create() request num=%d newcnt=%d vcnt=%d", 178 num, newcnt, vcnt)); 179 /* add new vchans - find a parent channel first */ 180 ch = NULL; 181 CHN_FOREACH(c, d, channels.pcm) { 182 CHN_LOCK(c); 183 if (c->direction == direction && 184 ((c->flags & CHN_F_HAS_VCHAN) || (vcnt == 0 && 185 c->refcount < 1 && 186 !(c->flags & (CHN_F_BUSY | CHN_F_VIRTUAL))))) { 187 /* 188 * Reuse hw channel with vchans already 189 * created. 190 */ 191 if (c->flags & CHN_F_HAS_VCHAN) { 192 ch = c; 193 break; 194 } 195 /* 196 * No vchans ever created, look for 197 * channels with supported formats. 198 */ 199 caps = chn_getcaps(c); 200 if (caps == NULL) { 201 CHN_UNLOCK(c); 202 continue; 203 } 204 for (i = 0; caps->fmtlist[i] != 0; i++) { 205 if (caps->fmtlist[i] & AFMT_CONVERTIBLE) 206 break; 207 } 208 if (caps->fmtlist[i] != 0) { 209 ch = c; 210 break; 211 } 212 } 213 CHN_UNLOCK(c); 214 } 215 if (ch == NULL) 216 return (EBUSY); 217 ch->flags |= CHN_F_BUSY; 218 err = 0; 219 while (err == 0 && newcnt > vcnt) { 220 err = vchan_create(ch, num); 221 if (err == 0) 222 vcnt++; 223 else if (err == E2BIG && newcnt > vcnt) 224 device_printf(d->dev, 225 "%s: err=%d Maximum channel reached.\n", 226 __func__, err); 227 } 228 if (vcnt == 0) 229 ch->flags &= ~CHN_F_BUSY; 230 CHN_UNLOCK(ch); 231 if (err != 0) 232 return (err); 233 else 234 pcm_clonereset(d); 235 } else if (newcnt < vcnt) { 236 KASSERT(num == -1, 237 ("bogus vchan_destroy() request num=%d", num)); 238 CHN_FOREACH(c, d, channels.pcm) { 239 CHN_LOCK(c); 240 if (c->direction != direction || 241 CHN_EMPTY(c, children) || 242 !(c->flags & CHN_F_HAS_VCHAN)) { 243 CHN_UNLOCK(c); 244 continue; 245 } 246 CHN_FOREACH_SAFE(ch, c, nch, children) { 247 CHN_LOCK(ch); 248 if (vcnt == 1 && c->refcount > 0) { 249 CHN_UNLOCK(ch); 250 break; 251 } 252 if (!(ch->flags & CHN_F_BUSY) && 253 ch->refcount < 1) { 254 err = vchan_destroy(ch); 255 if (err == 0) 256 vcnt--; 257 } else 258 CHN_UNLOCK(ch); 259 if (vcnt == newcnt) 260 break; 261 } 262 CHN_UNLOCK(c); 263 break; 264 } 265 pcm_clonereset(d); 266 } 267 268 return (0); 269 } 270 271 /* return error status and a locked channel */ 272 int 273 pcm_chnalloc(struct snddev_info *d, struct pcm_channel **ch, int direction, 274 pid_t pid, char *comm, int devunit) 275 { 276 struct pcm_channel *c; 277 int err, vchancount, vchan_num; 278 279 KASSERT(d != NULL && ch != NULL && (devunit == -1 || 280 !(devunit & ~(SND_U_MASK | SND_D_MASK | SND_C_MASK))) && 281 (direction == PCMDIR_PLAY || direction == PCMDIR_REC), 282 ("%s(): invalid d=%p ch=%p direction=%d pid=%d devunit=%d", 283 __func__, d, ch, direction, pid, devunit)); 284 PCM_BUSYASSERT(d); 285 286 /* Double check again. */ 287 if (devunit != -1) { 288 switch (snd_unit2d(devunit)) { 289 case SND_DEV_DSPHW_PLAY: 290 case SND_DEV_DSPHW_VPLAY: 291 if (direction != PCMDIR_PLAY) 292 return (ENOTSUP); 293 break; 294 case SND_DEV_DSPHW_REC: 295 case SND_DEV_DSPHW_VREC: 296 if (direction != PCMDIR_REC) 297 return (ENOTSUP); 298 break; 299 default: 300 if (!(direction == PCMDIR_PLAY || 301 direction == PCMDIR_REC)) 302 return (ENOTSUP); 303 break; 304 } 305 } 306 307 *ch = NULL; 308 vchan_num = 0; 309 vchancount = (direction == PCMDIR_PLAY) ? d->pvchancount : 310 d->rvchancount; 311 312 retry_chnalloc: 313 err = ENOTSUP; 314 /* scan for a free channel */ 315 CHN_FOREACH(c, d, channels.pcm) { 316 CHN_LOCK(c); 317 if (devunit == -1 && c->direction == direction && 318 (c->flags & CHN_F_VIRTUAL)) { 319 if (vchancount < snd_maxautovchans && 320 vchan_num < CHN_CHAN(c)) { 321 CHN_UNLOCK(c); 322 goto vchan_alloc; 323 } 324 vchan_num++; 325 } 326 if (c->direction == direction && !(c->flags & CHN_F_BUSY) && 327 (devunit == -1 || devunit == -2 || c->unit == devunit)) { 328 c->flags |= CHN_F_BUSY; 329 c->pid = pid; 330 strlcpy(c->comm, (comm != NULL) ? comm : 331 CHN_COMM_UNKNOWN, sizeof(c->comm)); 332 *ch = c; 333 return (0); 334 } else if (c->unit == devunit) { 335 if (c->direction != direction) 336 err = ENOTSUP; 337 else if (c->flags & CHN_F_BUSY) 338 err = EBUSY; 339 else 340 err = EINVAL; 341 CHN_UNLOCK(c); 342 return (err); 343 } else if ((devunit == -1 || devunit == -2) && 344 c->direction == direction && (c->flags & CHN_F_BUSY)) 345 err = EBUSY; 346 CHN_UNLOCK(c); 347 } 348 349 if (devunit == -2) 350 return (err); 351 352 vchan_alloc: 353 /* no channel available */ 354 if (devunit == -1 || snd_unit2d(devunit) == SND_DEV_DSPHW_VPLAY || 355 snd_unit2d(devunit) == SND_DEV_DSPHW_VREC) { 356 if (!(vchancount > 0 && vchancount < snd_maxautovchans) && 357 (devunit == -1 || snd_unit2c(devunit) < snd_maxautovchans)) 358 return (err); 359 err = pcm_setvchans(d, direction, vchancount + 1, 360 (devunit == -1) ? -1 : snd_unit2c(devunit)); 361 if (err == 0) { 362 if (devunit == -1) 363 devunit = -2; 364 goto retry_chnalloc; 365 } 366 } 367 368 return (err); 369 } 370 371 /* release a locked channel and unlock it */ 372 int 373 pcm_chnrelease(struct pcm_channel *c) 374 { 375 PCM_BUSYASSERT(c->parentsnddev); 376 CHN_LOCKASSERT(c); 377 378 c->flags &= ~CHN_F_BUSY; 379 c->pid = -1; 380 strlcpy(c->comm, CHN_COMM_UNUSED, sizeof(c->comm)); 381 CHN_UNLOCK(c); 382 383 return (0); 384 } 385 386 int 387 pcm_chnref(struct pcm_channel *c, int ref) 388 { 389 PCM_BUSYASSERT(c->parentsnddev); 390 CHN_LOCKASSERT(c); 391 392 c->refcount += ref; 393 394 return (c->refcount); 395 } 396 397 int 398 pcm_inprog(struct snddev_info *d, int delta) 399 { 400 PCM_LOCKASSERT(d); 401 402 d->inprog += delta; 403 404 return (d->inprog); 405 } 406 407 static void 408 pcm_setmaxautovchans(struct snddev_info *d, int num) 409 { 410 PCM_BUSYASSERT(d); 411 412 if (num < 0) 413 return; 414 415 if (num >= 0 && d->pvchancount > num) 416 (void)pcm_setvchans(d, PCMDIR_PLAY, num, -1); 417 else if (num > 0 && d->pvchancount == 0) 418 (void)pcm_setvchans(d, PCMDIR_PLAY, 1, -1); 419 420 if (num >= 0 && d->rvchancount > num) 421 (void)pcm_setvchans(d, PCMDIR_REC, num, -1); 422 else if (num > 0 && d->rvchancount == 0) 423 (void)pcm_setvchans(d, PCMDIR_REC, 1, -1); 424 425 pcm_clonereset(d); 426 } 427 428 static int 429 sysctl_hw_snd_default_unit(SYSCTL_HANDLER_ARGS) 430 { 431 struct snddev_info *d; 432 int error, unit; 433 434 unit = snd_unit; 435 error = sysctl_handle_int(oidp, &unit, 0, req); 436 if (error == 0 && req->newptr != NULL) { 437 d = devclass_get_softc(pcm_devclass, unit); 438 if (!PCM_REGISTERED(d) || CHN_EMPTY(d, channels.pcm)) 439 return EINVAL; 440 snd_unit = unit; 441 snd_unit_auto = 0; 442 } 443 return (error); 444 } 445 /* XXX: do we need a way to let the user change the default unit? */ 446 SYSCTL_PROC(_hw_snd, OID_AUTO, default_unit, 447 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_ANYBODY, 448 0, sizeof(int), sysctl_hw_snd_default_unit, "I", 449 "default sound device"); 450 451 static int 452 sysctl_hw_snd_maxautovchans(SYSCTL_HANDLER_ARGS) 453 { 454 struct snddev_info *d; 455 int i, v, error; 456 457 v = snd_maxautovchans; 458 error = sysctl_handle_int(oidp, &v, 0, req); 459 if (error == 0 && req->newptr != NULL) { 460 if (v < 0) 461 v = 0; 462 if (v > SND_MAXVCHANS) 463 v = SND_MAXVCHANS; 464 snd_maxautovchans = v; 465 for (i = 0; pcm_devclass != NULL && 466 i < devclass_get_maxunit(pcm_devclass); i++) { 467 d = devclass_get_softc(pcm_devclass, i); 468 if (!PCM_REGISTERED(d)) 469 continue; 470 PCM_ACQUIRE_QUICK(d); 471 pcm_setmaxautovchans(d, v); 472 PCM_RELEASE_QUICK(d); 473 } 474 } 475 return (error); 476 } 477 SYSCTL_PROC(_hw_snd, OID_AUTO, maxautovchans, CTLTYPE_INT | CTLFLAG_RW, 478 0, sizeof(int), sysctl_hw_snd_maxautovchans, "I", "maximum virtual channel"); 479 480 struct pcm_channel * 481 pcm_chn_create(struct snddev_info *d, struct pcm_channel *parent, kobj_class_t cls, int dir, int num, void *devinfo) 482 { 483 struct pcm_channel *ch; 484 int direction, err, rpnum, *pnum, max; 485 int udc, device, chan; 486 char *dirs, *devname, buf[CHN_NAMELEN]; 487 488 PCM_BUSYASSERT(d); 489 PCM_LOCKASSERT(d); 490 KASSERT(num >= -1, ("invalid num=%d", num)); 491 492 493 switch (dir) { 494 case PCMDIR_PLAY: 495 dirs = "play"; 496 direction = PCMDIR_PLAY; 497 pnum = &d->playcount; 498 device = SND_DEV_DSPHW_PLAY; 499 max = SND_MAXHWCHAN; 500 break; 501 case PCMDIR_PLAY_VIRTUAL: 502 dirs = "virtual"; 503 direction = PCMDIR_PLAY; 504 pnum = &d->pvchancount; 505 device = SND_DEV_DSPHW_VPLAY; 506 max = SND_MAXVCHANS; 507 break; 508 case PCMDIR_REC: 509 dirs = "record"; 510 direction = PCMDIR_REC; 511 pnum = &d->reccount; 512 device = SND_DEV_DSPHW_REC; 513 max = SND_MAXHWCHAN; 514 break; 515 case PCMDIR_REC_VIRTUAL: 516 dirs = "virtual"; 517 direction = PCMDIR_REC; 518 pnum = &d->rvchancount; 519 device = SND_DEV_DSPHW_VREC; 520 max = SND_MAXVCHANS; 521 break; 522 default: 523 return (NULL); 524 } 525 526 chan = (num == -1) ? 0 : num; 527 528 if (*pnum >= max || chan >= max) 529 return (NULL); 530 531 rpnum = 0; 532 533 CHN_FOREACH(ch, d, channels.pcm) { 534 if (CHN_DEV(ch) != device) 535 continue; 536 if (chan == CHN_CHAN(ch)) { 537 if (num != -1) { 538 device_printf(d->dev, 539 "channel num=%d allocated!\n", chan); 540 return (NULL); 541 } 542 chan++; 543 if (chan >= max) { 544 device_printf(d->dev, 545 "chan=%d > %d\n", chan, max); 546 return (NULL); 547 } 548 } 549 rpnum++; 550 } 551 552 if (*pnum != rpnum) { 553 device_printf(d->dev, 554 "%s(): WARNING: pnum screwed : dirs=%s pnum=%d rpnum=%d\n", 555 __func__, dirs, *pnum, rpnum); 556 return (NULL); 557 } 558 559 udc = snd_mkunit(device_get_unit(d->dev), device, chan); 560 devname = dsp_unit2name(buf, sizeof(buf), udc); 561 562 if (devname == NULL) { 563 device_printf(d->dev, 564 "Failed to query device name udc=0x%08x\n", udc); 565 return (NULL); 566 } 567 568 PCM_UNLOCK(d); 569 ch = malloc(sizeof(*ch), M_DEVBUF, M_WAITOK | M_ZERO); 570 ch->methods = kobj_create(cls, M_DEVBUF, M_WAITOK | M_ZERO); 571 ch->unit = udc; 572 ch->pid = -1; 573 strlcpy(ch->comm, CHN_COMM_UNUSED, sizeof(ch->comm)); 574 ch->parentsnddev = d; 575 ch->parentchannel = parent; 576 ch->dev = d->dev; 577 ch->trigger = PCMTRIG_STOP; 578 snprintf(ch->name, sizeof(ch->name), "%s:%s:%s", 579 device_get_nameunit(ch->dev), dirs, devname); 580 581 err = chn_init(ch, devinfo, dir, direction); 582 PCM_LOCK(d); 583 if (err) { 584 device_printf(d->dev, "chn_init(%s) failed: err = %d\n", 585 ch->name, err); 586 kobj_delete(ch->methods, M_DEVBUF); 587 free(ch, M_DEVBUF); 588 return (NULL); 589 } 590 591 return (ch); 592 } 593 594 int 595 pcm_chn_destroy(struct pcm_channel *ch) 596 { 597 struct snddev_info *d; 598 int err; 599 600 d = ch->parentsnddev; 601 PCM_BUSYASSERT(d); 602 603 err = chn_kill(ch); 604 if (err) { 605 device_printf(ch->dev, "chn_kill(%s) failed, err = %d\n", 606 ch->name, err); 607 return (err); 608 } 609 610 kobj_delete(ch->methods, M_DEVBUF); 611 free(ch, M_DEVBUF); 612 613 return (0); 614 } 615 616 int 617 pcm_chn_add(struct snddev_info *d, struct pcm_channel *ch) 618 { 619 PCM_BUSYASSERT(d); 620 PCM_LOCKASSERT(d); 621 KASSERT(ch != NULL && (ch->direction == PCMDIR_PLAY || 622 ch->direction == PCMDIR_REC), ("Invalid pcm channel")); 623 624 CHN_INSERT_SORT_ASCEND(d, ch, channels.pcm); 625 626 switch (CHN_DEV(ch)) { 627 case SND_DEV_DSPHW_PLAY: 628 d->playcount++; 629 break; 630 case SND_DEV_DSPHW_VPLAY: 631 d->pvchancount++; 632 break; 633 case SND_DEV_DSPHW_REC: 634 d->reccount++; 635 break; 636 case SND_DEV_DSPHW_VREC: 637 d->rvchancount++; 638 break; 639 default: 640 break; 641 } 642 643 d->devcount++; 644 645 return (0); 646 } 647 648 int 649 pcm_chn_remove(struct snddev_info *d, struct pcm_channel *ch) 650 { 651 struct pcm_channel *tmp; 652 653 PCM_BUSYASSERT(d); 654 PCM_LOCKASSERT(d); 655 656 tmp = NULL; 657 658 CHN_FOREACH(tmp, d, channels.pcm) { 659 if (tmp == ch) 660 break; 661 } 662 663 if (tmp != ch) 664 return (EINVAL); 665 666 CHN_REMOVE(d, ch, channels.pcm); 667 668 switch (CHN_DEV(ch)) { 669 case SND_DEV_DSPHW_PLAY: 670 d->playcount--; 671 break; 672 case SND_DEV_DSPHW_VPLAY: 673 d->pvchancount--; 674 break; 675 case SND_DEV_DSPHW_REC: 676 d->reccount--; 677 break; 678 case SND_DEV_DSPHW_VREC: 679 d->rvchancount--; 680 break; 681 default: 682 break; 683 } 684 685 d->devcount--; 686 687 return (0); 688 } 689 690 int 691 pcm_addchan(device_t dev, int dir, kobj_class_t cls, void *devinfo) 692 { 693 struct snddev_info *d = device_get_softc(dev); 694 struct pcm_channel *ch; 695 int err; 696 697 PCM_BUSYASSERT(d); 698 699 PCM_LOCK(d); 700 ch = pcm_chn_create(d, NULL, cls, dir, -1, devinfo); 701 if (!ch) { 702 device_printf(d->dev, "pcm_chn_create(%s, %d, %p) failed\n", 703 cls->name, dir, devinfo); 704 PCM_UNLOCK(d); 705 return (ENODEV); 706 } 707 708 err = pcm_chn_add(d, ch); 709 PCM_UNLOCK(d); 710 if (err) { 711 device_printf(d->dev, "pcm_chn_add(%s) failed, err=%d\n", 712 ch->name, err); 713 pcm_chn_destroy(ch); 714 } 715 716 return (err); 717 } 718 719 static int 720 pcm_killchan(device_t dev) 721 { 722 struct snddev_info *d = device_get_softc(dev); 723 struct pcm_channel *ch; 724 int error; 725 726 PCM_BUSYASSERT(d); 727 728 ch = CHN_FIRST(d, channels.pcm); 729 730 PCM_LOCK(d); 731 error = pcm_chn_remove(d, ch); 732 PCM_UNLOCK(d); 733 if (error) 734 return (error); 735 return (pcm_chn_destroy(ch)); 736 } 737 738 static int 739 pcm_best_unit(int old) 740 { 741 struct snddev_info *d; 742 int i, best, bestprio, prio; 743 744 best = -1; 745 bestprio = -100; 746 for (i = 0; pcm_devclass != NULL && 747 i < devclass_get_maxunit(pcm_devclass); i++) { 748 d = devclass_get_softc(pcm_devclass, i); 749 if (!PCM_REGISTERED(d)) 750 continue; 751 prio = 0; 752 if (d->playcount == 0) 753 prio -= 10; 754 if (d->reccount == 0) 755 prio -= 2; 756 if (prio > bestprio || (prio == bestprio && i == old)) { 757 best = i; 758 bestprio = prio; 759 } 760 } 761 return (best); 762 } 763 764 int 765 pcm_setstatus(device_t dev, char *str) 766 { 767 struct snddev_info *d = device_get_softc(dev); 768 769 PCM_BUSYASSERT(d); 770 771 if (d->playcount == 0 || d->reccount == 0) 772 d->flags |= SD_F_SIMPLEX; 773 774 if ((d->playcount > 0 || d->reccount > 0) && 775 !(d->flags & SD_F_AUTOVCHAN)) { 776 d->flags |= SD_F_AUTOVCHAN; 777 vchan_initsys(dev); 778 } 779 780 pcm_setmaxautovchans(d, snd_maxautovchans); 781 782 strlcpy(d->status, str, SND_STATUSLEN); 783 784 PCM_LOCK(d); 785 786 /* Last stage, enable cloning. */ 787 if (d->clones != NULL) 788 (void)snd_clone_enable(d->clones); 789 790 /* Done, we're ready.. */ 791 d->flags |= SD_F_REGISTERED; 792 793 PCM_RELEASE(d); 794 795 PCM_UNLOCK(d); 796 797 if (snd_unit_auto < 0) 798 snd_unit_auto = (snd_unit < 0) ? 1 : 0; 799 if (snd_unit < 0 || snd_unit_auto > 1) 800 snd_unit = device_get_unit(dev); 801 else if (snd_unit_auto == 1) 802 snd_unit = pcm_best_unit(snd_unit); 803 804 return (0); 805 } 806 807 uint32_t 808 pcm_getflags(device_t dev) 809 { 810 struct snddev_info *d = device_get_softc(dev); 811 812 return d->flags; 813 } 814 815 void 816 pcm_setflags(device_t dev, uint32_t val) 817 { 818 struct snddev_info *d = device_get_softc(dev); 819 820 d->flags = val; 821 } 822 823 void * 824 pcm_getdevinfo(device_t dev) 825 { 826 struct snddev_info *d = device_get_softc(dev); 827 828 return d->devinfo; 829 } 830 831 unsigned int 832 pcm_getbuffersize(device_t dev, unsigned int minbufsz, unsigned int deflt, unsigned int maxbufsz) 833 { 834 struct snddev_info *d = device_get_softc(dev); 835 int sz, x; 836 837 sz = 0; 838 if (resource_int_value(device_get_name(dev), device_get_unit(dev), "buffersize", &sz) == 0) { 839 x = sz; 840 RANGE(sz, minbufsz, maxbufsz); 841 if (x != sz) 842 device_printf(dev, "'buffersize=%d' hint is out of range (%d-%d), using %d\n", x, minbufsz, maxbufsz, sz); 843 x = minbufsz; 844 while (x < sz) 845 x <<= 1; 846 if (x > sz) 847 x >>= 1; 848 if (x != sz) { 849 device_printf(dev, "'buffersize=%d' hint is not a power of 2, using %d\n", sz, x); 850 sz = x; 851 } 852 } else { 853 sz = deflt; 854 } 855 856 d->bufsz = sz; 857 858 return sz; 859 } 860 861 static int 862 sysctl_dev_pcm_bitperfect(SYSCTL_HANDLER_ARGS) 863 { 864 struct snddev_info *d; 865 int err, val; 866 867 d = oidp->oid_arg1; 868 if (!PCM_REGISTERED(d)) 869 return (ENODEV); 870 871 PCM_LOCK(d); 872 PCM_WAIT(d); 873 val = (d->flags & SD_F_BITPERFECT) ? 1 : 0; 874 PCM_ACQUIRE(d); 875 PCM_UNLOCK(d); 876 877 err = sysctl_handle_int(oidp, &val, 0, req); 878 879 if (err == 0 && req->newptr != NULL) { 880 if (!(val == 0 || val == 1)) { 881 PCM_RELEASE_QUICK(d); 882 return (EINVAL); 883 } 884 885 PCM_LOCK(d); 886 887 d->flags &= ~SD_F_BITPERFECT; 888 d->flags |= (val != 0) ? SD_F_BITPERFECT : 0; 889 890 PCM_RELEASE(d); 891 PCM_UNLOCK(d); 892 } else 893 PCM_RELEASE_QUICK(d); 894 895 return (err); 896 } 897 898 #ifdef SND_DEBUG 899 static int 900 sysctl_dev_pcm_clone_flags(SYSCTL_HANDLER_ARGS) 901 { 902 struct snddev_info *d; 903 uint32_t flags; 904 int err; 905 906 d = oidp->oid_arg1; 907 if (!PCM_REGISTERED(d) || d->clones == NULL) 908 return (ENODEV); 909 910 PCM_ACQUIRE_QUICK(d); 911 912 flags = snd_clone_getflags(d->clones); 913 err = sysctl_handle_int(oidp, &flags, 0, req); 914 915 if (err == 0 && req->newptr != NULL) { 916 if (flags & ~SND_CLONE_MASK) 917 err = EINVAL; 918 else 919 (void)snd_clone_setflags(d->clones, flags); 920 } 921 922 PCM_RELEASE_QUICK(d); 923 924 return (err); 925 } 926 927 static int 928 sysctl_dev_pcm_clone_deadline(SYSCTL_HANDLER_ARGS) 929 { 930 struct snddev_info *d; 931 int err, deadline; 932 933 d = oidp->oid_arg1; 934 if (!PCM_REGISTERED(d) || d->clones == NULL) 935 return (ENODEV); 936 937 PCM_ACQUIRE_QUICK(d); 938 939 deadline = snd_clone_getdeadline(d->clones); 940 err = sysctl_handle_int(oidp, &deadline, 0, req); 941 942 if (err == 0 && req->newptr != NULL) { 943 if (deadline < 0) 944 err = EINVAL; 945 else 946 (void)snd_clone_setdeadline(d->clones, deadline); 947 } 948 949 PCM_RELEASE_QUICK(d); 950 951 return (err); 952 } 953 954 static int 955 sysctl_dev_pcm_clone_gc(SYSCTL_HANDLER_ARGS) 956 { 957 struct snddev_info *d; 958 int err, val; 959 960 d = oidp->oid_arg1; 961 if (!PCM_REGISTERED(d) || d->clones == NULL) 962 return (ENODEV); 963 964 val = 0; 965 err = sysctl_handle_int(oidp, &val, 0, req); 966 967 if (err == 0 && req->newptr != NULL && val != 0) { 968 PCM_ACQUIRE_QUICK(d); 969 val = snd_clone_gc(d->clones); 970 PCM_RELEASE_QUICK(d); 971 if (bootverbose != 0 || snd_verbose > 3) 972 device_printf(d->dev, "clone gc: pruned=%d\n", val); 973 } 974 975 return (err); 976 } 977 978 static int 979 sysctl_hw_snd_clone_gc(SYSCTL_HANDLER_ARGS) 980 { 981 struct snddev_info *d; 982 int i, err, val; 983 984 val = 0; 985 err = sysctl_handle_int(oidp, &val, 0, req); 986 987 if (err == 0 && req->newptr != NULL && val != 0) { 988 for (i = 0; pcm_devclass != NULL && 989 i < devclass_get_maxunit(pcm_devclass); i++) { 990 d = devclass_get_softc(pcm_devclass, i); 991 if (!PCM_REGISTERED(d) || d->clones == NULL) 992 continue; 993 PCM_ACQUIRE_QUICK(d); 994 val = snd_clone_gc(d->clones); 995 PCM_RELEASE_QUICK(d); 996 if (bootverbose != 0 || snd_verbose > 3) 997 device_printf(d->dev, "clone gc: pruned=%d\n", 998 val); 999 } 1000 } 1001 1002 return (err); 1003 } 1004 SYSCTL_PROC(_hw_snd, OID_AUTO, clone_gc, CTLTYPE_INT | CTLFLAG_RW, 1005 0, sizeof(int), sysctl_hw_snd_clone_gc, "I", 1006 "global clone garbage collector"); 1007 #endif 1008 1009 int 1010 pcm_register(device_t dev, void *devinfo, int numplay, int numrec) 1011 { 1012 struct snddev_info *d; 1013 int i; 1014 1015 if (pcm_veto_load) { 1016 device_printf(dev, "disabled due to an error while initialising: %d\n", pcm_veto_load); 1017 1018 return EINVAL; 1019 } 1020 1021 if (device_get_unit(dev) > PCMMAXUNIT) { 1022 device_printf(dev, "PCMMAXUNIT reached : unit=%d > %d\n", 1023 device_get_unit(dev), PCMMAXUNIT); 1024 device_printf(dev, 1025 "Use 'hw.snd.maxunit' tunable to raise the limit.\n"); 1026 return ENODEV; 1027 } 1028 1029 d = device_get_softc(dev); 1030 d->dev = dev; 1031 d->lock = snd_mtxcreate(device_get_nameunit(dev), "sound cdev"); 1032 cv_init(&d->cv, device_get_nameunit(dev)); 1033 PCM_ACQUIRE_QUICK(d); 1034 dsp_cdevinfo_init(d); 1035 #if 0 1036 /* 1037 * d->flags should be cleared by the allocator of the softc. 1038 * We cannot clear this field here because several devices set 1039 * this flag before calling pcm_register(). 1040 */ 1041 d->flags = 0; 1042 #endif 1043 i = 0; 1044 if (resource_int_value(device_get_name(dev), device_get_unit(dev), 1045 "vpc", &i) != 0 || i != 0) 1046 d->flags |= SD_F_VPC; 1047 1048 if (resource_int_value(device_get_name(dev), device_get_unit(dev), 1049 "bitperfect", &i) == 0 && i != 0) 1050 d->flags |= SD_F_BITPERFECT; 1051 1052 d->devinfo = devinfo; 1053 d->devcount = 0; 1054 d->reccount = 0; 1055 d->playcount = 0; 1056 d->pvchancount = 0; 1057 d->rvchancount = 0; 1058 d->pvchanrate = 0; 1059 d->pvchanformat = 0; 1060 d->rvchanrate = 0; 1061 d->rvchanformat = 0; 1062 d->inprog = 0; 1063 1064 /* 1065 * Create clone manager, disabled by default. Cloning will be 1066 * enabled during final stage of driver initialization through 1067 * pcm_setstatus(). 1068 */ 1069 d->clones = snd_clone_create(SND_U_MASK | SND_D_MASK, PCMMAXCLONE, 1070 SND_CLONE_DEADLINE_DEFAULT, SND_CLONE_WAITOK | 1071 SND_CLONE_GC_ENABLE | SND_CLONE_GC_UNREF | 1072 SND_CLONE_GC_LASTREF | SND_CLONE_GC_EXPIRED); 1073 1074 CHN_INIT(d, channels.pcm); 1075 CHN_INIT(d, channels.pcm.busy); 1076 CHN_INIT(d, channels.pcm.opened); 1077 1078 /* XXX This is incorrect, but lets play along for now. */ 1079 if ((numplay == 0 || numrec == 0) && numplay != numrec) 1080 d->flags |= SD_F_SIMPLEX; 1081 1082 sysctl_ctx_init(&d->play_sysctl_ctx); 1083 d->play_sysctl_tree = SYSCTL_ADD_NODE(&d->play_sysctl_ctx, 1084 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, "play", 1085 CTLFLAG_RD, 0, "playback channels node"); 1086 sysctl_ctx_init(&d->rec_sysctl_ctx); 1087 d->rec_sysctl_tree = SYSCTL_ADD_NODE(&d->rec_sysctl_ctx, 1088 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, "rec", 1089 CTLFLAG_RD, 0, "record channels node"); 1090 /* XXX: an user should be able to set this with a control tool, the 1091 sysadmin then needs min+max sysctls for this */ 1092 SYSCTL_ADD_UINT(device_get_sysctl_ctx(dev), 1093 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), 1094 OID_AUTO, "buffersize", CTLFLAG_RD, &d->bufsz, 0, "allocated buffer size"); 1095 SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev), 1096 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, 1097 "bitperfect", CTLTYPE_INT | CTLFLAG_RW, d, sizeof(d), 1098 sysctl_dev_pcm_bitperfect, "I", 1099 "bit-perfect playback/recording (0=disable, 1=enable)"); 1100 #ifdef SND_DEBUG 1101 SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev), 1102 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, 1103 "clone_flags", CTLTYPE_UINT | CTLFLAG_RW, d, sizeof(d), 1104 sysctl_dev_pcm_clone_flags, "IU", 1105 "clone flags"); 1106 SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev), 1107 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, 1108 "clone_deadline", CTLTYPE_INT | CTLFLAG_RW, d, sizeof(d), 1109 sysctl_dev_pcm_clone_deadline, "I", 1110 "clone expiration deadline (ms)"); 1111 SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev), 1112 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, 1113 "clone_gc", CTLTYPE_INT | CTLFLAG_RW, d, sizeof(d), 1114 sysctl_dev_pcm_clone_gc, "I", 1115 "clone garbage collector"); 1116 #endif 1117 1118 if (numplay > 0 || numrec > 0) { 1119 d->flags |= SD_F_AUTOVCHAN; 1120 vchan_initsys(dev); 1121 } 1122 1123 if (d->flags & SD_F_EQ) 1124 feeder_eq_initsys(dev); 1125 1126 sndstat_register(dev, d->status, sndstat_prepare_pcm); 1127 1128 return 0; 1129 } 1130 1131 int 1132 pcm_unregister(device_t dev) 1133 { 1134 struct snddev_info *d; 1135 struct pcm_channel *ch; 1136 struct thread *td; 1137 1138 td = curthread; 1139 d = device_get_softc(dev); 1140 1141 if (!PCM_ALIVE(d)) { 1142 device_printf(dev, "unregister: device not configured\n"); 1143 return (0); 1144 } 1145 1146 if (sndstat_acquire(td) != 0) { 1147 device_printf(dev, "unregister: sndstat busy\n"); 1148 return (EBUSY); 1149 } 1150 1151 PCM_LOCK(d); 1152 PCM_WAIT(d); 1153 1154 if (d->inprog != 0) { 1155 device_printf(dev, "unregister: operation in progress\n"); 1156 PCM_UNLOCK(d); 1157 sndstat_release(td); 1158 return (EBUSY); 1159 } 1160 1161 PCM_ACQUIRE(d); 1162 PCM_UNLOCK(d); 1163 1164 CHN_FOREACH(ch, d, channels.pcm) { 1165 CHN_LOCK(ch); 1166 if (ch->refcount > 0) { 1167 device_printf(dev, 1168 "unregister: channel %s busy (pid %d)\n", 1169 ch->name, ch->pid); 1170 CHN_UNLOCK(ch); 1171 PCM_RELEASE_QUICK(d); 1172 sndstat_release(td); 1173 return (EBUSY); 1174 } 1175 CHN_UNLOCK(ch); 1176 } 1177 1178 if (d->clones != NULL) { 1179 if (snd_clone_busy(d->clones) != 0) { 1180 device_printf(dev, "unregister: clone busy\n"); 1181 PCM_RELEASE_QUICK(d); 1182 sndstat_release(td); 1183 return (EBUSY); 1184 } else { 1185 PCM_LOCK(d); 1186 (void)snd_clone_disable(d->clones); 1187 PCM_UNLOCK(d); 1188 } 1189 } 1190 1191 if (mixer_uninit(dev) == EBUSY) { 1192 device_printf(dev, "unregister: mixer busy\n"); 1193 PCM_LOCK(d); 1194 if (d->clones != NULL) 1195 (void)snd_clone_enable(d->clones); 1196 PCM_RELEASE(d); 1197 PCM_UNLOCK(d); 1198 sndstat_release(td); 1199 return (EBUSY); 1200 } 1201 1202 PCM_LOCK(d); 1203 d->flags |= SD_F_DYING; 1204 d->flags &= ~SD_F_REGISTERED; 1205 PCM_UNLOCK(d); 1206 1207 /* 1208 * No lock being held, so this thing can be flushed without 1209 * stucking into devdrn oblivion. 1210 */ 1211 if (d->clones != NULL) { 1212 snd_clone_destroy(d->clones); 1213 d->clones = NULL; 1214 } 1215 1216 if (d->play_sysctl_tree != NULL) { 1217 sysctl_ctx_free(&d->play_sysctl_ctx); 1218 d->play_sysctl_tree = NULL; 1219 } 1220 if (d->rec_sysctl_tree != NULL) { 1221 sysctl_ctx_free(&d->rec_sysctl_ctx); 1222 d->rec_sysctl_tree = NULL; 1223 } 1224 1225 while (!CHN_EMPTY(d, channels.pcm)) 1226 pcm_killchan(dev); 1227 1228 dsp_cdevinfo_flush(d); 1229 1230 PCM_LOCK(d); 1231 PCM_RELEASE(d); 1232 cv_destroy(&d->cv); 1233 PCM_UNLOCK(d); 1234 snd_mtxfree(d->lock); 1235 sndstat_unregister(dev); 1236 sndstat_release(td); 1237 1238 if (snd_unit == device_get_unit(dev)) { 1239 snd_unit = pcm_best_unit(-1); 1240 if (snd_unit_auto == 0) 1241 snd_unit_auto = 1; 1242 } 1243 1244 return (0); 1245 } 1246 1247 /************************************************************************/ 1248 1249 /** 1250 * @brief Handle OSSv4 SNDCTL_SYSINFO ioctl. 1251 * 1252 * @param si Pointer to oss_sysinfo struct where information about the 1253 * sound subsystem will be written/copied. 1254 * 1255 * This routine returns information about the sound system, such as the 1256 * current OSS version, number of audio, MIDI, and mixer drivers, etc. 1257 * Also includes a bitmask showing which of the above types of devices 1258 * are open (busy). 1259 * 1260 * @note 1261 * Calling threads must not hold any snddev_info or pcm_channel locks. 1262 * 1263 * @author Ryan Beasley <ryanb@FreeBSD.org> 1264 */ 1265 void 1266 sound_oss_sysinfo(oss_sysinfo *si) 1267 { 1268 static char si_product[] = "FreeBSD native OSS ABI"; 1269 static char si_version[] = __XSTRING(__FreeBSD_version); 1270 static char si_license[] = "BSD"; 1271 static int intnbits = sizeof(int) * 8; /* Better suited as macro? 1272 Must pester a C guru. */ 1273 1274 struct snddev_info *d; 1275 struct pcm_channel *c; 1276 int i, j, ncards; 1277 1278 ncards = 0; 1279 1280 strlcpy(si->product, si_product, sizeof(si->product)); 1281 strlcpy(si->version, si_version, sizeof(si->version)); 1282 si->versionnum = SOUND_VERSION; 1283 strlcpy(si->license, si_license, sizeof(si->license)); 1284 1285 /* 1286 * Iterate over PCM devices and their channels, gathering up data 1287 * for the numaudios, ncards, and openedaudio fields. 1288 */ 1289 si->numaudios = 0; 1290 bzero((void *)&si->openedaudio, sizeof(si->openedaudio)); 1291 1292 j = 0; 1293 1294 for (i = 0; pcm_devclass != NULL && 1295 i < devclass_get_maxunit(pcm_devclass); i++) { 1296 d = devclass_get_softc(pcm_devclass, i); 1297 if (!PCM_REGISTERED(d)) 1298 continue; 1299 1300 /* XXX Need Giant magic entry ??? */ 1301 1302 /* See note in function's docblock */ 1303 PCM_UNLOCKASSERT(d); 1304 PCM_LOCK(d); 1305 1306 si->numaudios += d->devcount; 1307 ++ncards; 1308 1309 CHN_FOREACH(c, d, channels.pcm) { 1310 CHN_UNLOCKASSERT(c); 1311 CHN_LOCK(c); 1312 if (c->flags & CHN_F_BUSY) 1313 si->openedaudio[j / intnbits] |= 1314 (1 << (j % intnbits)); 1315 CHN_UNLOCK(c); 1316 j++; 1317 } 1318 1319 PCM_UNLOCK(d); 1320 } 1321 si->numaudioengines = si->numaudios; 1322 1323 si->numsynths = 0; /* OSSv4 docs: this field is obsolete */ 1324 /** 1325 * @todo Collect num{midis,timers}. 1326 * 1327 * Need access to sound/midi/midi.c::midistat_lock in order 1328 * to safely touch midi_devices and get a head count of, well, 1329 * MIDI devices. midistat_lock is a global static (i.e., local to 1330 * midi.c), but midi_devices is a regular global; should the mutex 1331 * be publicized, or is there another way to get this information? 1332 * 1333 * NB: MIDI/sequencer stuff is currently on hold. 1334 */ 1335 si->nummidis = 0; 1336 si->numtimers = 0; 1337 si->nummixers = mixer_count; 1338 si->numcards = ncards; 1339 /* OSSv4 docs: Intended only for test apps; API doesn't 1340 really have much of a concept of cards. Shouldn't be 1341 used by applications. */ 1342 1343 /** 1344 * @todo Fill in "busy devices" fields. 1345 * 1346 * si->openedmidi = " MIDI devices 1347 */ 1348 bzero((void *)&si->openedmidi, sizeof(si->openedmidi)); 1349 1350 /* 1351 * Si->filler is a reserved array, but according to docs each 1352 * element should be set to -1. 1353 */ 1354 for (i = 0; i < sizeof(si->filler)/sizeof(si->filler[0]); i++) 1355 si->filler[i] = -1; 1356 } 1357 1358 int 1359 sound_oss_card_info(oss_card_info *si) 1360 { 1361 struct snddev_info *d; 1362 int i, ncards; 1363 1364 ncards = 0; 1365 1366 for (i = 0; pcm_devclass != NULL && 1367 i < devclass_get_maxunit(pcm_devclass); i++) { 1368 d = devclass_get_softc(pcm_devclass, i); 1369 if (!PCM_REGISTERED(d)) 1370 continue; 1371 1372 if (ncards++ != si->card) 1373 continue; 1374 1375 PCM_UNLOCKASSERT(d); 1376 PCM_LOCK(d); 1377 1378 strlcpy(si->shortname, device_get_nameunit(d->dev), 1379 sizeof(si->shortname)); 1380 strlcpy(si->longname, device_get_desc(d->dev), 1381 sizeof(si->longname)); 1382 strlcpy(si->hw_info, d->status, sizeof(si->hw_info)); 1383 si->intr_count = si->ack_count = 0; 1384 1385 PCM_UNLOCK(d); 1386 1387 return (0); 1388 } 1389 return (ENXIO); 1390 } 1391 1392 /************************************************************************/ 1393 1394 static int 1395 sound_modevent(module_t mod, int type, void *data) 1396 { 1397 int ret; 1398 #if 0 1399 return (midi_modevent(mod, type, data)); 1400 #else 1401 ret = 0; 1402 1403 switch(type) { 1404 case MOD_LOAD: 1405 pcmsg_unrhdr = new_unrhdr(1, INT_MAX, NULL); 1406 break; 1407 case MOD_UNLOAD: 1408 ret = sndstat_acquire(curthread); 1409 if (ret != 0) 1410 break; 1411 if (pcmsg_unrhdr != NULL) { 1412 delete_unrhdr(pcmsg_unrhdr); 1413 pcmsg_unrhdr = NULL; 1414 } 1415 break; 1416 case MOD_SHUTDOWN: 1417 break; 1418 default: 1419 ret = ENOTSUP; 1420 } 1421 1422 return ret; 1423 #endif 1424 } 1425 1426 DEV_MODULE(sound, sound_modevent, NULL); 1427 MODULE_VERSION(sound, SOUND_MODVER); 1428