1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2005-2009 Ariff Abdullah <ariff@FreeBSD.org> 5 * Portions Copyright (c) Ryan Beasley <ryan.beasley@gmail.com> - GSoC 2006 6 * Copyright (c) 1999 Cameron Grant <cg@FreeBSD.org> 7 * Copyright (c) 1997 Luigi Rizzo 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #ifdef HAVE_KERNEL_OPTION_HEADERS 33 #include "opt_snd.h" 34 #endif 35 36 #include <dev/sound/pcm/sound.h> 37 #include <dev/sound/pcm/ac97.h> 38 #include <dev/sound/pcm/vchan.h> 39 #include <dev/sound/pcm/dsp.h> 40 #include <dev/sound/pcm/sndstat.h> 41 #include <dev/sound/version.h> 42 #include <sys/limits.h> 43 #include <sys/sysctl.h> 44 45 #include "feeder_if.h" 46 47 devclass_t pcm_devclass; 48 49 int pcm_veto_load = 1; 50 51 int snd_unit = -1; 52 53 static int snd_unit_auto = -1; 54 SYSCTL_INT(_hw_snd, OID_AUTO, default_auto, CTLFLAG_RWTUN, 55 &snd_unit_auto, 0, "assign default unit to a newly attached device"); 56 57 int snd_maxautovchans = 16; 58 59 SYSCTL_NODE(_hw, OID_AUTO, snd, CTLFLAG_RD | CTLFLAG_MPSAFE, 0, 60 "Sound driver"); 61 62 static void pcm_sysinit(device_t); 63 64 /* 65 * XXX I've had enough with people not telling proper version/arch 66 * while reporting problems, not after 387397913213th questions/requests. 67 */ 68 static char snd_driver_version[] = 69 __XSTRING(SND_DRV_VERSION)"/"MACHINE_ARCH; 70 SYSCTL_STRING(_hw_snd, OID_AUTO, version, CTLFLAG_RD, &snd_driver_version, 71 0, "driver version/arch"); 72 73 /** 74 * @brief Unit number allocator for syncgroup IDs 75 */ 76 struct unrhdr *pcmsg_unrhdr = NULL; 77 78 static int 79 sndstat_prepare_pcm(SNDSTAT_PREPARE_PCM_ARGS) 80 { 81 SNDSTAT_PREPARE_PCM_BEGIN(); 82 SNDSTAT_PREPARE_PCM_END(); 83 } 84 85 void * 86 snd_mtxcreate(const char *desc, const char *type) 87 { 88 struct mtx *m; 89 90 m = malloc(sizeof(*m), M_DEVBUF, M_WAITOK | M_ZERO); 91 mtx_init(m, desc, type, MTX_DEF); 92 return m; 93 } 94 95 void 96 snd_mtxfree(void *m) 97 { 98 struct mtx *mtx = m; 99 100 mtx_destroy(mtx); 101 free(mtx, M_DEVBUF); 102 } 103 104 void 105 snd_mtxassert(void *m) 106 { 107 #ifdef INVARIANTS 108 struct mtx *mtx = m; 109 110 mtx_assert(mtx, MA_OWNED); 111 #endif 112 } 113 114 int 115 snd_setup_intr(device_t dev, struct resource *res, int flags, driver_intr_t hand, void *param, void **cookiep) 116 { 117 struct snddev_info *d; 118 119 flags &= INTR_MPSAFE; 120 flags |= INTR_TYPE_AV; 121 d = device_get_softc(dev); 122 if (d != NULL && (flags & INTR_MPSAFE)) 123 d->flags |= SD_F_MPSAFE; 124 125 return bus_setup_intr(dev, res, flags, NULL, hand, param, cookiep); 126 } 127 128 static void 129 pcm_clonereset(struct snddev_info *d) 130 { 131 int cmax; 132 133 PCM_BUSYASSERT(d); 134 135 cmax = d->playcount + d->reccount - 1; 136 if (d->pvchancount > 0) 137 cmax += max(d->pvchancount, snd_maxautovchans) - 1; 138 if (d->rvchancount > 0) 139 cmax += max(d->rvchancount, snd_maxautovchans) - 1; 140 if (cmax > PCMMAXCLONE) 141 cmax = PCMMAXCLONE; 142 (void)snd_clone_gc(d->clones); 143 (void)snd_clone_setmaxunit(d->clones, cmax); 144 } 145 146 int 147 pcm_setvchans(struct snddev_info *d, int direction, int newcnt, int num) 148 { 149 struct pcm_channel *c, *ch, *nch; 150 struct pcmchan_caps *caps; 151 int i, err, vcnt; 152 153 PCM_BUSYASSERT(d); 154 155 if ((direction == PCMDIR_PLAY && d->playcount < 1) || 156 (direction == PCMDIR_REC && d->reccount < 1)) 157 return (ENODEV); 158 159 if (!(d->flags & SD_F_AUTOVCHAN)) 160 return (EINVAL); 161 162 if (newcnt < 0 || newcnt > SND_MAXVCHANS) 163 return (E2BIG); 164 165 if (direction == PCMDIR_PLAY) 166 vcnt = d->pvchancount; 167 else if (direction == PCMDIR_REC) 168 vcnt = d->rvchancount; 169 else 170 return (EINVAL); 171 172 if (newcnt > vcnt) { 173 KASSERT(num == -1 || 174 (num >= 0 && num < SND_MAXVCHANS && (newcnt - 1) == vcnt), 175 ("bogus vchan_create() request num=%d newcnt=%d vcnt=%d", 176 num, newcnt, vcnt)); 177 /* add new vchans - find a parent channel first */ 178 ch = NULL; 179 CHN_FOREACH(c, d, channels.pcm) { 180 CHN_LOCK(c); 181 if (c->direction == direction && 182 ((c->flags & CHN_F_HAS_VCHAN) || (vcnt == 0 && 183 c->refcount < 1 && 184 !(c->flags & (CHN_F_BUSY | CHN_F_VIRTUAL))))) { 185 /* 186 * Reuse hw channel with vchans already 187 * created. 188 */ 189 if (c->flags & CHN_F_HAS_VCHAN) { 190 ch = c; 191 break; 192 } 193 /* 194 * No vchans ever created, look for 195 * channels with supported formats. 196 */ 197 caps = chn_getcaps(c); 198 if (caps == NULL) { 199 CHN_UNLOCK(c); 200 continue; 201 } 202 for (i = 0; caps->fmtlist[i] != 0; i++) { 203 if (caps->fmtlist[i] & AFMT_CONVERTIBLE) 204 break; 205 } 206 if (caps->fmtlist[i] != 0) { 207 ch = c; 208 break; 209 } 210 } 211 CHN_UNLOCK(c); 212 } 213 if (ch == NULL) 214 return (EBUSY); 215 ch->flags |= CHN_F_BUSY; 216 err = 0; 217 while (err == 0 && newcnt > vcnt) { 218 err = vchan_create(ch, num); 219 if (err == 0) 220 vcnt++; 221 else if (err == E2BIG && newcnt > vcnt) 222 device_printf(d->dev, 223 "%s: err=%d Maximum channel reached.\n", 224 __func__, err); 225 } 226 if (vcnt == 0) 227 ch->flags &= ~CHN_F_BUSY; 228 CHN_UNLOCK(ch); 229 if (err != 0) 230 return (err); 231 else 232 pcm_clonereset(d); 233 } else if (newcnt < vcnt) { 234 KASSERT(num == -1, 235 ("bogus vchan_destroy() request num=%d", num)); 236 CHN_FOREACH(c, d, channels.pcm) { 237 CHN_LOCK(c); 238 if (c->direction != direction || 239 CHN_EMPTY(c, children) || 240 !(c->flags & CHN_F_HAS_VCHAN)) { 241 CHN_UNLOCK(c); 242 continue; 243 } 244 CHN_FOREACH_SAFE(ch, c, nch, children) { 245 CHN_LOCK(ch); 246 if (vcnt == 1 && c->refcount > 0) { 247 CHN_UNLOCK(ch); 248 break; 249 } 250 if (!(ch->flags & CHN_F_BUSY) && 251 ch->refcount < 1) { 252 err = vchan_destroy(ch); 253 if (err == 0) 254 vcnt--; 255 } else 256 CHN_UNLOCK(ch); 257 if (vcnt == newcnt) 258 break; 259 } 260 CHN_UNLOCK(c); 261 break; 262 } 263 pcm_clonereset(d); 264 } 265 266 return (0); 267 } 268 269 /* return error status and a locked channel */ 270 int 271 pcm_chnalloc(struct snddev_info *d, struct pcm_channel **ch, int direction, 272 pid_t pid, char *comm, int devunit) 273 { 274 struct pcm_channel *c; 275 int err, vchancount, vchan_num; 276 277 KASSERT(d != NULL && ch != NULL && (devunit == -1 || 278 !(devunit & ~(SND_U_MASK | SND_D_MASK | SND_C_MASK))) && 279 (direction == PCMDIR_PLAY || direction == PCMDIR_REC), 280 ("%s(): invalid d=%p ch=%p direction=%d pid=%d devunit=%d", 281 __func__, d, ch, direction, pid, devunit)); 282 PCM_BUSYASSERT(d); 283 284 /* Double check again. */ 285 if (devunit != -1) { 286 switch (snd_unit2d(devunit)) { 287 case SND_DEV_DSPHW_PLAY: 288 case SND_DEV_DSPHW_VPLAY: 289 if (direction != PCMDIR_PLAY) 290 return (ENOTSUP); 291 break; 292 case SND_DEV_DSPHW_REC: 293 case SND_DEV_DSPHW_VREC: 294 if (direction != PCMDIR_REC) 295 return (ENOTSUP); 296 break; 297 default: 298 if (!(direction == PCMDIR_PLAY || 299 direction == PCMDIR_REC)) 300 return (ENOTSUP); 301 break; 302 } 303 } 304 305 *ch = NULL; 306 vchan_num = 0; 307 vchancount = (direction == PCMDIR_PLAY) ? d->pvchancount : 308 d->rvchancount; 309 310 retry_chnalloc: 311 err = ENOTSUP; 312 /* scan for a free channel */ 313 CHN_FOREACH(c, d, channels.pcm) { 314 CHN_LOCK(c); 315 if (devunit == -1 && c->direction == direction && 316 (c->flags & CHN_F_VIRTUAL)) { 317 if (vchancount < snd_maxautovchans && 318 vchan_num < CHN_CHAN(c)) { 319 CHN_UNLOCK(c); 320 goto vchan_alloc; 321 } 322 vchan_num++; 323 } 324 if (c->direction == direction && !(c->flags & CHN_F_BUSY) && 325 (devunit == -1 || devunit == -2 || c->unit == devunit)) { 326 c->flags |= CHN_F_BUSY; 327 c->pid = pid; 328 strlcpy(c->comm, (comm != NULL) ? comm : 329 CHN_COMM_UNKNOWN, sizeof(c->comm)); 330 *ch = c; 331 return (0); 332 } else if (c->unit == devunit) { 333 if (c->direction != direction) 334 err = ENOTSUP; 335 else if (c->flags & CHN_F_BUSY) 336 err = EBUSY; 337 else 338 err = EINVAL; 339 CHN_UNLOCK(c); 340 return (err); 341 } else if ((devunit == -1 || devunit == -2) && 342 c->direction == direction && (c->flags & CHN_F_BUSY)) 343 err = EBUSY; 344 CHN_UNLOCK(c); 345 } 346 347 if (devunit == -2) 348 return (err); 349 350 vchan_alloc: 351 /* no channel available */ 352 if (devunit == -1 || snd_unit2d(devunit) == SND_DEV_DSPHW_VPLAY || 353 snd_unit2d(devunit) == SND_DEV_DSPHW_VREC) { 354 if (!(vchancount > 0 && vchancount < snd_maxautovchans) && 355 (devunit == -1 || snd_unit2c(devunit) < snd_maxautovchans)) 356 return (err); 357 err = pcm_setvchans(d, direction, vchancount + 1, 358 (devunit == -1) ? -1 : snd_unit2c(devunit)); 359 if (err == 0) { 360 if (devunit == -1) 361 devunit = -2; 362 goto retry_chnalloc; 363 } 364 } 365 366 return (err); 367 } 368 369 /* release a locked channel and unlock it */ 370 int 371 pcm_chnrelease(struct pcm_channel *c) 372 { 373 PCM_BUSYASSERT(c->parentsnddev); 374 CHN_LOCKASSERT(c); 375 376 c->flags &= ~CHN_F_BUSY; 377 c->pid = -1; 378 strlcpy(c->comm, CHN_COMM_UNUSED, sizeof(c->comm)); 379 CHN_UNLOCK(c); 380 381 return (0); 382 } 383 384 int 385 pcm_chnref(struct pcm_channel *c, int ref) 386 { 387 PCM_BUSYASSERT(c->parentsnddev); 388 CHN_LOCKASSERT(c); 389 390 c->refcount += ref; 391 392 return (c->refcount); 393 } 394 395 int 396 pcm_inprog(struct snddev_info *d, int delta) 397 { 398 PCM_LOCKASSERT(d); 399 400 d->inprog += delta; 401 402 return (d->inprog); 403 } 404 405 static void 406 pcm_setmaxautovchans(struct snddev_info *d, int num) 407 { 408 PCM_BUSYASSERT(d); 409 410 if (num < 0) 411 return; 412 413 if (num >= 0 && d->pvchancount > num) 414 (void)pcm_setvchans(d, PCMDIR_PLAY, num, -1); 415 else if (num > 0 && d->pvchancount == 0) 416 (void)pcm_setvchans(d, PCMDIR_PLAY, 1, -1); 417 418 if (num >= 0 && d->rvchancount > num) 419 (void)pcm_setvchans(d, PCMDIR_REC, num, -1); 420 else if (num > 0 && d->rvchancount == 0) 421 (void)pcm_setvchans(d, PCMDIR_REC, 1, -1); 422 423 pcm_clonereset(d); 424 } 425 426 static int 427 sysctl_hw_snd_default_unit(SYSCTL_HANDLER_ARGS) 428 { 429 struct snddev_info *d; 430 int error, unit; 431 432 unit = snd_unit; 433 error = sysctl_handle_int(oidp, &unit, 0, req); 434 if (error == 0 && req->newptr != NULL) { 435 d = devclass_get_softc(pcm_devclass, unit); 436 if (!PCM_REGISTERED(d) || CHN_EMPTY(d, channels.pcm)) 437 return EINVAL; 438 snd_unit = unit; 439 snd_unit_auto = 0; 440 } 441 return (error); 442 } 443 /* XXX: do we need a way to let the user change the default unit? */ 444 SYSCTL_PROC(_hw_snd, OID_AUTO, default_unit, 445 CTLTYPE_INT | CTLFLAG_RWTUN | CTLFLAG_ANYBODY | CTLFLAG_NEEDGIANT, 0, 446 sizeof(int), sysctl_hw_snd_default_unit, "I", 447 "default sound device"); 448 449 static int 450 sysctl_hw_snd_maxautovchans(SYSCTL_HANDLER_ARGS) 451 { 452 struct snddev_info *d; 453 int i, v, error; 454 455 v = snd_maxautovchans; 456 error = sysctl_handle_int(oidp, &v, 0, req); 457 if (error == 0 && req->newptr != NULL) { 458 if (v < 0) 459 v = 0; 460 if (v > SND_MAXVCHANS) 461 v = SND_MAXVCHANS; 462 snd_maxautovchans = v; 463 for (i = 0; pcm_devclass != NULL && 464 i < devclass_get_maxunit(pcm_devclass); i++) { 465 d = devclass_get_softc(pcm_devclass, i); 466 if (!PCM_REGISTERED(d)) 467 continue; 468 PCM_ACQUIRE_QUICK(d); 469 pcm_setmaxautovchans(d, v); 470 PCM_RELEASE_QUICK(d); 471 } 472 } 473 return (error); 474 } 475 SYSCTL_PROC(_hw_snd, OID_AUTO, maxautovchans, 476 CTLTYPE_INT | CTLFLAG_RWTUN | CTLFLAG_NEEDGIANT, 0, sizeof(int), 477 sysctl_hw_snd_maxautovchans, "I", 478 "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 switch (dir) { 493 case PCMDIR_PLAY: 494 dirs = "play"; 495 direction = PCMDIR_PLAY; 496 pnum = &d->playcount; 497 device = SND_DEV_DSPHW_PLAY; 498 max = SND_MAXHWCHAN; 499 break; 500 case PCMDIR_PLAY_VIRTUAL: 501 dirs = "virtual"; 502 direction = PCMDIR_PLAY; 503 pnum = &d->pvchancount; 504 device = SND_DEV_DSPHW_VPLAY; 505 max = SND_MAXVCHANS; 506 break; 507 case PCMDIR_REC: 508 dirs = "record"; 509 direction = PCMDIR_REC; 510 pnum = &d->reccount; 511 device = SND_DEV_DSPHW_REC; 512 max = SND_MAXHWCHAN; 513 break; 514 case PCMDIR_REC_VIRTUAL: 515 dirs = "virtual"; 516 direction = PCMDIR_REC; 517 pnum = &d->rvchancount; 518 device = SND_DEV_DSPHW_VREC; 519 max = SND_MAXVCHANS; 520 break; 521 default: 522 return (NULL); 523 } 524 525 chan = (num == -1) ? 0 : num; 526 527 if (*pnum >= max || chan >= max) 528 return (NULL); 529 530 rpnum = 0; 531 532 CHN_FOREACH(ch, d, channels.pcm) { 533 if (CHN_DEV(ch) != device) 534 continue; 535 if (chan == CHN_CHAN(ch)) { 536 if (num != -1) { 537 device_printf(d->dev, 538 "channel num=%d allocated!\n", chan); 539 return (NULL); 540 } 541 chan++; 542 if (chan >= max) { 543 device_printf(d->dev, 544 "chan=%d > %d\n", chan, max); 545 return (NULL); 546 } 547 } 548 rpnum++; 549 } 550 551 if (*pnum != rpnum) { 552 device_printf(d->dev, 553 "%s(): WARNING: pnum screwed : dirs=%s pnum=%d rpnum=%d\n", 554 __func__, dirs, *pnum, rpnum); 555 return (NULL); 556 } 557 558 udc = snd_mkunit(device_get_unit(d->dev), device, chan); 559 devname = dsp_unit2name(buf, sizeof(buf), udc); 560 561 if (devname == NULL) { 562 device_printf(d->dev, 563 "Failed to query device name udc=0x%08x\n", udc); 564 return (NULL); 565 } 566 567 PCM_UNLOCK(d); 568 ch = malloc(sizeof(*ch), M_DEVBUF, M_WAITOK | M_ZERO); 569 ch->methods = kobj_create(cls, M_DEVBUF, M_WAITOK | M_ZERO); 570 ch->unit = udc; 571 ch->pid = -1; 572 strlcpy(ch->comm, CHN_COMM_UNUSED, sizeof(ch->comm)); 573 ch->parentsnddev = d; 574 ch->parentchannel = parent; 575 ch->dev = d->dev; 576 ch->trigger = PCMTRIG_STOP; 577 snprintf(ch->name, sizeof(ch->name), "%s:%s:%s", 578 device_get_nameunit(ch->dev), dirs, devname); 579 580 err = chn_init(ch, devinfo, dir, direction); 581 PCM_LOCK(d); 582 if (err) { 583 device_printf(d->dev, "chn_init(%s) failed: err = %d\n", 584 ch->name, err); 585 kobj_delete(ch->methods, M_DEVBUF); 586 free(ch, M_DEVBUF); 587 return (NULL); 588 } 589 590 return (ch); 591 } 592 593 int 594 pcm_chn_destroy(struct pcm_channel *ch) 595 { 596 struct snddev_info *d __diagused; 597 int err; 598 599 d = ch->parentsnddev; 600 PCM_BUSYASSERT(d); 601 602 err = chn_kill(ch); 603 if (err) { 604 device_printf(ch->dev, "chn_kill(%s) failed, err = %d\n", 605 ch->name, err); 606 return (err); 607 } 608 609 kobj_delete(ch->methods, M_DEVBUF); 610 free(ch, M_DEVBUF); 611 612 return (0); 613 } 614 615 int 616 pcm_chn_add(struct snddev_info *d, struct pcm_channel *ch) 617 { 618 PCM_BUSYASSERT(d); 619 PCM_LOCKASSERT(d); 620 KASSERT(ch != NULL && (ch->direction == PCMDIR_PLAY || 621 ch->direction == PCMDIR_REC), ("Invalid pcm channel")); 622 623 CHN_INSERT_SORT_ASCEND(d, ch, channels.pcm); 624 625 switch (CHN_DEV(ch)) { 626 case SND_DEV_DSPHW_PLAY: 627 d->playcount++; 628 break; 629 case SND_DEV_DSPHW_VPLAY: 630 d->pvchancount++; 631 break; 632 case SND_DEV_DSPHW_REC: 633 d->reccount++; 634 break; 635 case SND_DEV_DSPHW_VREC: 636 d->rvchancount++; 637 break; 638 default: 639 break; 640 } 641 642 d->devcount++; 643 644 return (0); 645 } 646 647 int 648 pcm_chn_remove(struct snddev_info *d, struct pcm_channel *ch) 649 { 650 struct pcm_channel *tmp; 651 652 PCM_BUSYASSERT(d); 653 PCM_LOCKASSERT(d); 654 655 tmp = NULL; 656 657 CHN_FOREACH(tmp, d, channels.pcm) { 658 if (tmp == ch) 659 break; 660 } 661 662 if (tmp != ch) 663 return (EINVAL); 664 665 CHN_REMOVE(d, ch, channels.pcm); 666 667 switch (CHN_DEV(ch)) { 668 case SND_DEV_DSPHW_PLAY: 669 d->playcount--; 670 break; 671 case SND_DEV_DSPHW_VPLAY: 672 d->pvchancount--; 673 break; 674 case SND_DEV_DSPHW_REC: 675 d->reccount--; 676 break; 677 case SND_DEV_DSPHW_VREC: 678 d->rvchancount--; 679 break; 680 default: 681 break; 682 } 683 684 d->devcount--; 685 686 return (0); 687 } 688 689 int 690 pcm_addchan(device_t dev, int dir, kobj_class_t cls, void *devinfo) 691 { 692 struct snddev_info *d = device_get_softc(dev); 693 struct pcm_channel *ch; 694 int err; 695 696 PCM_BUSYASSERT(d); 697 698 PCM_LOCK(d); 699 ch = pcm_chn_create(d, NULL, cls, dir, -1, devinfo); 700 if (!ch) { 701 device_printf(d->dev, "pcm_chn_create(%s, %d, %p) failed\n", 702 cls->name, dir, devinfo); 703 PCM_UNLOCK(d); 704 return (ENODEV); 705 } 706 707 err = pcm_chn_add(d, ch); 708 PCM_UNLOCK(d); 709 if (err) { 710 device_printf(d->dev, "pcm_chn_add(%s) failed, err=%d\n", 711 ch->name, err); 712 pcm_chn_destroy(ch); 713 } 714 715 return (err); 716 } 717 718 static int 719 pcm_killchan(device_t dev) 720 { 721 struct snddev_info *d = device_get_softc(dev); 722 struct pcm_channel *ch; 723 int error; 724 725 PCM_BUSYASSERT(d); 726 727 ch = CHN_FIRST(d, channels.pcm); 728 729 PCM_LOCK(d); 730 error = pcm_chn_remove(d, ch); 731 PCM_UNLOCK(d); 732 if (error) 733 return (error); 734 return (pcm_chn_destroy(ch)); 735 } 736 737 static int 738 pcm_best_unit(int old) 739 { 740 struct snddev_info *d; 741 int i, best, bestprio, prio; 742 743 best = -1; 744 bestprio = -100; 745 for (i = 0; pcm_devclass != NULL && 746 i < devclass_get_maxunit(pcm_devclass); i++) { 747 d = devclass_get_softc(pcm_devclass, i); 748 if (!PCM_REGISTERED(d)) 749 continue; 750 prio = 0; 751 if (d->playcount == 0) 752 prio -= 10; 753 if (d->reccount == 0) 754 prio -= 2; 755 if (prio > bestprio || (prio == bestprio && i == old)) { 756 best = i; 757 bestprio = prio; 758 } 759 } 760 return (best); 761 } 762 763 int 764 pcm_setstatus(device_t dev, char *str) 765 { 766 struct snddev_info *d = device_get_softc(dev); 767 768 /* should only be called once */ 769 if (d->flags & SD_F_REGISTERED) 770 return (EINVAL); 771 772 PCM_BUSYASSERT(d); 773 774 if (d->playcount == 0 || d->reccount == 0) 775 d->flags |= SD_F_SIMPLEX; 776 777 if (d->playcount > 0 || d->reccount > 0) 778 d->flags |= SD_F_AUTOVCHAN; 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 /* 798 * Create all sysctls once SD_F_REGISTERED is set else 799 * tunable sysctls won't work: 800 */ 801 pcm_sysinit(dev); 802 803 if (snd_unit_auto < 0) 804 snd_unit_auto = (snd_unit < 0) ? 1 : 0; 805 if (snd_unit < 0 || snd_unit_auto > 1) 806 snd_unit = device_get_unit(dev); 807 else if (snd_unit_auto == 1) 808 snd_unit = pcm_best_unit(snd_unit); 809 810 return (0); 811 } 812 813 uint32_t 814 pcm_getflags(device_t dev) 815 { 816 struct snddev_info *d = device_get_softc(dev); 817 818 return d->flags; 819 } 820 821 void 822 pcm_setflags(device_t dev, uint32_t val) 823 { 824 struct snddev_info *d = device_get_softc(dev); 825 826 d->flags = val; 827 } 828 829 void * 830 pcm_getdevinfo(device_t dev) 831 { 832 struct snddev_info *d = device_get_softc(dev); 833 834 return d->devinfo; 835 } 836 837 unsigned int 838 pcm_getbuffersize(device_t dev, unsigned int minbufsz, unsigned int deflt, unsigned int maxbufsz) 839 { 840 struct snddev_info *d = device_get_softc(dev); 841 int sz, x; 842 843 sz = 0; 844 if (resource_int_value(device_get_name(dev), device_get_unit(dev), "buffersize", &sz) == 0) { 845 x = sz; 846 RANGE(sz, minbufsz, maxbufsz); 847 if (x != sz) 848 device_printf(dev, "'buffersize=%d' hint is out of range (%d-%d), using %d\n", x, minbufsz, maxbufsz, sz); 849 x = minbufsz; 850 while (x < sz) 851 x <<= 1; 852 if (x > sz) 853 x >>= 1; 854 if (x != sz) { 855 device_printf(dev, "'buffersize=%d' hint is not a power of 2, using %d\n", sz, x); 856 sz = x; 857 } 858 } else { 859 sz = deflt; 860 } 861 862 d->bufsz = sz; 863 864 return sz; 865 } 866 867 static int 868 sysctl_dev_pcm_bitperfect(SYSCTL_HANDLER_ARGS) 869 { 870 struct snddev_info *d; 871 int err, val; 872 873 d = oidp->oid_arg1; 874 if (!PCM_REGISTERED(d)) 875 return (ENODEV); 876 877 PCM_LOCK(d); 878 PCM_WAIT(d); 879 val = (d->flags & SD_F_BITPERFECT) ? 1 : 0; 880 PCM_ACQUIRE(d); 881 PCM_UNLOCK(d); 882 883 err = sysctl_handle_int(oidp, &val, 0, req); 884 885 if (err == 0 && req->newptr != NULL) { 886 if (!(val == 0 || val == 1)) { 887 PCM_RELEASE_QUICK(d); 888 return (EINVAL); 889 } 890 891 PCM_LOCK(d); 892 893 d->flags &= ~SD_F_BITPERFECT; 894 d->flags |= (val != 0) ? SD_F_BITPERFECT : 0; 895 896 PCM_RELEASE(d); 897 PCM_UNLOCK(d); 898 } else 899 PCM_RELEASE_QUICK(d); 900 901 return (err); 902 } 903 904 #ifdef SND_DEBUG 905 static int 906 sysctl_dev_pcm_clone_flags(SYSCTL_HANDLER_ARGS) 907 { 908 struct snddev_info *d; 909 uint32_t flags; 910 int err; 911 912 d = oidp->oid_arg1; 913 if (!PCM_REGISTERED(d) || d->clones == NULL) 914 return (ENODEV); 915 916 PCM_ACQUIRE_QUICK(d); 917 918 flags = snd_clone_getflags(d->clones); 919 err = sysctl_handle_int(oidp, &flags, 0, req); 920 921 if (err == 0 && req->newptr != NULL) { 922 if (flags & ~SND_CLONE_MASK) 923 err = EINVAL; 924 else 925 (void)snd_clone_setflags(d->clones, flags); 926 } 927 928 PCM_RELEASE_QUICK(d); 929 930 return (err); 931 } 932 933 static int 934 sysctl_dev_pcm_clone_deadline(SYSCTL_HANDLER_ARGS) 935 { 936 struct snddev_info *d; 937 int err, deadline; 938 939 d = oidp->oid_arg1; 940 if (!PCM_REGISTERED(d) || d->clones == NULL) 941 return (ENODEV); 942 943 PCM_ACQUIRE_QUICK(d); 944 945 deadline = snd_clone_getdeadline(d->clones); 946 err = sysctl_handle_int(oidp, &deadline, 0, req); 947 948 if (err == 0 && req->newptr != NULL) { 949 if (deadline < 0) 950 err = EINVAL; 951 else 952 (void)snd_clone_setdeadline(d->clones, deadline); 953 } 954 955 PCM_RELEASE_QUICK(d); 956 957 return (err); 958 } 959 960 static int 961 sysctl_dev_pcm_clone_gc(SYSCTL_HANDLER_ARGS) 962 { 963 struct snddev_info *d; 964 int err, val; 965 966 d = oidp->oid_arg1; 967 if (!PCM_REGISTERED(d) || d->clones == NULL) 968 return (ENODEV); 969 970 val = 0; 971 err = sysctl_handle_int(oidp, &val, 0, req); 972 973 if (err == 0 && req->newptr != NULL && val != 0) { 974 PCM_ACQUIRE_QUICK(d); 975 val = snd_clone_gc(d->clones); 976 PCM_RELEASE_QUICK(d); 977 if (bootverbose != 0 || snd_verbose > 3) 978 device_printf(d->dev, "clone gc: pruned=%d\n", val); 979 } 980 981 return (err); 982 } 983 984 static int 985 sysctl_hw_snd_clone_gc(SYSCTL_HANDLER_ARGS) 986 { 987 struct snddev_info *d; 988 int i, err, val; 989 990 val = 0; 991 err = sysctl_handle_int(oidp, &val, 0, req); 992 993 if (err == 0 && req->newptr != NULL && val != 0) { 994 for (i = 0; pcm_devclass != NULL && 995 i < devclass_get_maxunit(pcm_devclass); i++) { 996 d = devclass_get_softc(pcm_devclass, i); 997 if (!PCM_REGISTERED(d) || d->clones == NULL) 998 continue; 999 PCM_ACQUIRE_QUICK(d); 1000 val = snd_clone_gc(d->clones); 1001 PCM_RELEASE_QUICK(d); 1002 if (bootverbose != 0 || snd_verbose > 3) 1003 device_printf(d->dev, "clone gc: pruned=%d\n", 1004 val); 1005 } 1006 } 1007 1008 return (err); 1009 } 1010 SYSCTL_PROC(_hw_snd, OID_AUTO, clone_gc, 1011 CTLTYPE_INT | CTLFLAG_RWTUN | CTLFLAG_NEEDGIANT, 0, sizeof(int), 1012 sysctl_hw_snd_clone_gc, "I", 1013 "global clone garbage collector"); 1014 #endif 1015 1016 static u_int8_t 1017 pcm_mode_init(struct snddev_info *d) 1018 { 1019 u_int8_t mode = 0; 1020 1021 if (d->playcount > 0) 1022 mode |= PCM_MODE_PLAY; 1023 if (d->reccount > 0) 1024 mode |= PCM_MODE_REC; 1025 if (d->mixer_dev != NULL) 1026 mode |= PCM_MODE_MIXER; 1027 1028 return (mode); 1029 } 1030 1031 static void 1032 pcm_sysinit(device_t dev) 1033 { 1034 struct snddev_info *d = device_get_softc(dev); 1035 u_int8_t mode; 1036 1037 mode = pcm_mode_init(d); 1038 1039 /* XXX: a user should be able to set this with a control tool, the 1040 sysadmin then needs min+max sysctls for this */ 1041 SYSCTL_ADD_UINT(device_get_sysctl_ctx(dev), 1042 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), 1043 OID_AUTO, "buffersize", CTLFLAG_RD, &d->bufsz, 0, "allocated buffer size"); 1044 SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev), 1045 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, 1046 "bitperfect", CTLTYPE_INT | CTLFLAG_RWTUN | CTLFLAG_MPSAFE, d, 1047 sizeof(d), sysctl_dev_pcm_bitperfect, "I", 1048 "bit-perfect playback/recording (0=disable, 1=enable)"); 1049 SYSCTL_ADD_UINT(device_get_sysctl_ctx(dev), 1050 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), 1051 OID_AUTO, "mode", CTLFLAG_RD, NULL, mode, 1052 "mode (1=mixer, 2=play, 4=rec. The values are OR'ed if more than one" 1053 "mode is supported)"); 1054 #ifdef SND_DEBUG 1055 SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev), 1056 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, 1057 "clone_flags", CTLTYPE_UINT | CTLFLAG_RWTUN | CTLFLAG_MPSAFE, 1058 d, sizeof(d), sysctl_dev_pcm_clone_flags, "IU", 1059 "clone flags"); 1060 SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev), 1061 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, 1062 "clone_deadline", CTLTYPE_INT | CTLFLAG_RWTUN | CTLFLAG_MPSAFE, 1063 d, sizeof(d), sysctl_dev_pcm_clone_deadline, "I", 1064 "clone expiration deadline (ms)"); 1065 SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev), 1066 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, 1067 "clone_gc", 1068 CTLTYPE_INT | CTLFLAG_RWTUN | CTLFLAG_MPSAFE, d, sizeof(d), 1069 sysctl_dev_pcm_clone_gc, "I", "clone garbage collector"); 1070 #endif 1071 if (d->flags & SD_F_AUTOVCHAN) 1072 vchan_initsys(dev); 1073 if (d->flags & SD_F_EQ) 1074 feeder_eq_initsys(dev); 1075 } 1076 1077 int 1078 pcm_register(device_t dev, void *devinfo, int numplay, int numrec) 1079 { 1080 struct snddev_info *d; 1081 int i; 1082 1083 if (pcm_veto_load) { 1084 device_printf(dev, "disabled due to an error while initialising: %d\n", pcm_veto_load); 1085 1086 return EINVAL; 1087 } 1088 1089 if (device_get_unit(dev) > PCMMAXUNIT) { 1090 device_printf(dev, "PCMMAXUNIT reached : unit=%d > %d\n", 1091 device_get_unit(dev), PCMMAXUNIT); 1092 device_printf(dev, 1093 "Use 'hw.snd.maxunit' tunable to raise the limit.\n"); 1094 return ENODEV; 1095 } 1096 1097 d = device_get_softc(dev); 1098 d->dev = dev; 1099 d->lock = snd_mtxcreate(device_get_nameunit(dev), "sound cdev"); 1100 cv_init(&d->cv, device_get_nameunit(dev)); 1101 PCM_ACQUIRE_QUICK(d); 1102 dsp_cdevinfo_init(d); 1103 #if 0 1104 /* 1105 * d->flags should be cleared by the allocator of the softc. 1106 * We cannot clear this field here because several devices set 1107 * this flag before calling pcm_register(). 1108 */ 1109 d->flags = 0; 1110 #endif 1111 i = 0; 1112 if (resource_int_value(device_get_name(dev), device_get_unit(dev), 1113 "vpc", &i) != 0 || i != 0) 1114 d->flags |= SD_F_VPC; 1115 1116 if (resource_int_value(device_get_name(dev), device_get_unit(dev), 1117 "bitperfect", &i) == 0 && i != 0) 1118 d->flags |= SD_F_BITPERFECT; 1119 1120 d->devinfo = devinfo; 1121 d->devcount = 0; 1122 d->reccount = 0; 1123 d->playcount = 0; 1124 d->pvchancount = 0; 1125 d->rvchancount = 0; 1126 d->pvchanrate = 0; 1127 d->pvchanformat = 0; 1128 d->rvchanrate = 0; 1129 d->rvchanformat = 0; 1130 d->inprog = 0; 1131 1132 /* 1133 * Create clone manager, disabled by default. Cloning will be 1134 * enabled during final stage of driver initialization through 1135 * pcm_setstatus(). 1136 */ 1137 d->clones = snd_clone_create(SND_U_MASK | SND_D_MASK, PCMMAXCLONE, 1138 SND_CLONE_DEADLINE_DEFAULT, SND_CLONE_WAITOK | 1139 SND_CLONE_GC_ENABLE | SND_CLONE_GC_UNREF | 1140 SND_CLONE_GC_LASTREF | SND_CLONE_GC_EXPIRED); 1141 1142 CHN_INIT(d, channels.pcm); 1143 CHN_INIT(d, channels.pcm.busy); 1144 CHN_INIT(d, channels.pcm.opened); 1145 1146 /* XXX This is incorrect, but lets play along for now. */ 1147 if ((numplay == 0 || numrec == 0) && numplay != numrec) 1148 d->flags |= SD_F_SIMPLEX; 1149 1150 sysctl_ctx_init(&d->play_sysctl_ctx); 1151 d->play_sysctl_tree = SYSCTL_ADD_NODE(&d->play_sysctl_ctx, 1152 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, "play", 1153 CTLFLAG_RD | CTLFLAG_MPSAFE, 0, "playback channels node"); 1154 sysctl_ctx_init(&d->rec_sysctl_ctx); 1155 d->rec_sysctl_tree = SYSCTL_ADD_NODE(&d->rec_sysctl_ctx, 1156 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, "rec", 1157 CTLFLAG_RD | CTLFLAG_MPSAFE, 0, "recording channels node"); 1158 1159 if (numplay > 0 || numrec > 0) 1160 d->flags |= SD_F_AUTOVCHAN; 1161 1162 sndstat_register(dev, d->status, sndstat_prepare_pcm); 1163 1164 return 0; 1165 } 1166 1167 int 1168 pcm_unregister(device_t dev) 1169 { 1170 struct snddev_info *d; 1171 struct pcm_channel *ch; 1172 1173 d = device_get_softc(dev); 1174 1175 if (!PCM_ALIVE(d)) { 1176 device_printf(dev, "unregister: device not configured\n"); 1177 return (0); 1178 } 1179 1180 PCM_LOCK(d); 1181 PCM_WAIT(d); 1182 1183 d->flags |= SD_F_DETACHING; 1184 1185 if (d->inprog != 0) { 1186 device_printf(dev, "unregister: operation in progress\n"); 1187 PCM_UNLOCK(d); 1188 return (EBUSY); 1189 } 1190 1191 PCM_ACQUIRE(d); 1192 PCM_UNLOCK(d); 1193 1194 CHN_FOREACH(ch, d, channels.pcm) { 1195 CHN_LOCK(ch); 1196 if (ch->refcount > 0) { 1197 device_printf(dev, 1198 "unregister: channel %s busy (pid %d)\n", 1199 ch->name, ch->pid); 1200 CHN_UNLOCK(ch); 1201 PCM_RELEASE_QUICK(d); 1202 return (EBUSY); 1203 } 1204 CHN_UNLOCK(ch); 1205 } 1206 1207 if (d->clones != NULL) { 1208 if (snd_clone_busy(d->clones) != 0) { 1209 device_printf(dev, "unregister: clone busy\n"); 1210 PCM_RELEASE_QUICK(d); 1211 return (EBUSY); 1212 } else { 1213 PCM_LOCK(d); 1214 (void)snd_clone_disable(d->clones); 1215 PCM_UNLOCK(d); 1216 } 1217 } 1218 1219 if (mixer_uninit(dev) == EBUSY) { 1220 device_printf(dev, "unregister: mixer busy\n"); 1221 PCM_LOCK(d); 1222 if (d->clones != NULL) 1223 (void)snd_clone_enable(d->clones); 1224 PCM_RELEASE(d); 1225 PCM_UNLOCK(d); 1226 return (EBUSY); 1227 } 1228 1229 /* remove /dev/sndstat entry first */ 1230 sndstat_unregister(dev); 1231 1232 PCM_LOCK(d); 1233 d->flags |= SD_F_DYING; 1234 d->flags &= ~SD_F_REGISTERED; 1235 PCM_UNLOCK(d); 1236 1237 /* 1238 * No lock being held, so this thing can be flushed without 1239 * stucking into devdrn oblivion. 1240 */ 1241 if (d->clones != NULL) { 1242 snd_clone_destroy(d->clones); 1243 d->clones = NULL; 1244 } 1245 1246 if (d->play_sysctl_tree != NULL) { 1247 sysctl_ctx_free(&d->play_sysctl_ctx); 1248 d->play_sysctl_tree = NULL; 1249 } 1250 if (d->rec_sysctl_tree != NULL) { 1251 sysctl_ctx_free(&d->rec_sysctl_ctx); 1252 d->rec_sysctl_tree = NULL; 1253 } 1254 1255 while (!CHN_EMPTY(d, channels.pcm)) 1256 pcm_killchan(dev); 1257 1258 dsp_cdevinfo_flush(d); 1259 1260 PCM_LOCK(d); 1261 PCM_RELEASE(d); 1262 cv_destroy(&d->cv); 1263 PCM_UNLOCK(d); 1264 snd_mtxfree(d->lock); 1265 1266 if (snd_unit == device_get_unit(dev)) { 1267 snd_unit = pcm_best_unit(-1); 1268 if (snd_unit_auto == 0) 1269 snd_unit_auto = 1; 1270 } 1271 1272 return (0); 1273 } 1274 1275 /************************************************************************/ 1276 1277 /** 1278 * @brief Handle OSSv4 SNDCTL_SYSINFO ioctl. 1279 * 1280 * @param si Pointer to oss_sysinfo struct where information about the 1281 * sound subsystem will be written/copied. 1282 * 1283 * This routine returns information about the sound system, such as the 1284 * current OSS version, number of audio, MIDI, and mixer drivers, etc. 1285 * Also includes a bitmask showing which of the above types of devices 1286 * are open (busy). 1287 * 1288 * @note 1289 * Calling threads must not hold any snddev_info or pcm_channel locks. 1290 * 1291 * @author Ryan Beasley <ryanb@FreeBSD.org> 1292 */ 1293 void 1294 sound_oss_sysinfo(oss_sysinfo *si) 1295 { 1296 static char si_product[] = "FreeBSD native OSS ABI"; 1297 static char si_version[] = __XSTRING(__FreeBSD_version); 1298 static char si_license[] = "BSD"; 1299 static int intnbits = sizeof(int) * 8; /* Better suited as macro? 1300 Must pester a C guru. */ 1301 1302 struct snddev_info *d; 1303 struct pcm_channel *c; 1304 int i, j, ncards; 1305 1306 ncards = 0; 1307 1308 strlcpy(si->product, si_product, sizeof(si->product)); 1309 strlcpy(si->version, si_version, sizeof(si->version)); 1310 si->versionnum = SOUND_VERSION; 1311 strlcpy(si->license, si_license, sizeof(si->license)); 1312 1313 /* 1314 * Iterate over PCM devices and their channels, gathering up data 1315 * for the numaudios, ncards, and openedaudio fields. 1316 */ 1317 si->numaudios = 0; 1318 bzero((void *)&si->openedaudio, sizeof(si->openedaudio)); 1319 1320 j = 0; 1321 1322 for (i = 0; pcm_devclass != NULL && 1323 i < devclass_get_maxunit(pcm_devclass); i++) { 1324 d = devclass_get_softc(pcm_devclass, i); 1325 if (!PCM_REGISTERED(d)) 1326 continue; 1327 1328 /* XXX Need Giant magic entry ??? */ 1329 1330 /* See note in function's docblock */ 1331 PCM_UNLOCKASSERT(d); 1332 PCM_LOCK(d); 1333 1334 si->numaudios += d->devcount; 1335 ++ncards; 1336 1337 CHN_FOREACH(c, d, channels.pcm) { 1338 CHN_UNLOCKASSERT(c); 1339 CHN_LOCK(c); 1340 if (c->flags & CHN_F_BUSY) 1341 si->openedaudio[j / intnbits] |= 1342 (1 << (j % intnbits)); 1343 CHN_UNLOCK(c); 1344 j++; 1345 } 1346 1347 PCM_UNLOCK(d); 1348 } 1349 si->numaudioengines = si->numaudios; 1350 1351 si->numsynths = 0; /* OSSv4 docs: this field is obsolete */ 1352 /** 1353 * @todo Collect num{midis,timers}. 1354 * 1355 * Need access to sound/midi/midi.c::midistat_lock in order 1356 * to safely touch midi_devices and get a head count of, well, 1357 * MIDI devices. midistat_lock is a global static (i.e., local to 1358 * midi.c), but midi_devices is a regular global; should the mutex 1359 * be publicized, or is there another way to get this information? 1360 * 1361 * NB: MIDI/sequencer stuff is currently on hold. 1362 */ 1363 si->nummidis = 0; 1364 si->numtimers = 0; 1365 si->nummixers = mixer_count; 1366 si->numcards = ncards; 1367 /* OSSv4 docs: Intended only for test apps; API doesn't 1368 really have much of a concept of cards. Shouldn't be 1369 used by applications. */ 1370 1371 /** 1372 * @todo Fill in "busy devices" fields. 1373 * 1374 * si->openedmidi = " MIDI devices 1375 */ 1376 bzero((void *)&si->openedmidi, sizeof(si->openedmidi)); 1377 1378 /* 1379 * Si->filler is a reserved array, but according to docs each 1380 * element should be set to -1. 1381 */ 1382 for (i = 0; i < sizeof(si->filler)/sizeof(si->filler[0]); i++) 1383 si->filler[i] = -1; 1384 } 1385 1386 int 1387 sound_oss_card_info(oss_card_info *si) 1388 { 1389 struct snddev_info *d; 1390 int i, ncards; 1391 1392 ncards = 0; 1393 1394 for (i = 0; pcm_devclass != NULL && 1395 i < devclass_get_maxunit(pcm_devclass); i++) { 1396 d = devclass_get_softc(pcm_devclass, i); 1397 if (!PCM_REGISTERED(d)) 1398 continue; 1399 1400 if (ncards++ != si->card) 1401 continue; 1402 1403 PCM_UNLOCKASSERT(d); 1404 PCM_LOCK(d); 1405 1406 strlcpy(si->shortname, device_get_nameunit(d->dev), 1407 sizeof(si->shortname)); 1408 strlcpy(si->longname, device_get_desc(d->dev), 1409 sizeof(si->longname)); 1410 strlcpy(si->hw_info, d->status, sizeof(si->hw_info)); 1411 si->intr_count = si->ack_count = 0; 1412 1413 PCM_UNLOCK(d); 1414 1415 return (0); 1416 } 1417 return (ENXIO); 1418 } 1419 1420 /************************************************************************/ 1421 1422 static int 1423 sound_modevent(module_t mod, int type, void *data) 1424 { 1425 int ret; 1426 1427 ret = 0; 1428 switch (type) { 1429 case MOD_LOAD: 1430 pcm_devclass = devclass_create("pcm"); 1431 pcmsg_unrhdr = new_unrhdr(1, INT_MAX, NULL); 1432 break; 1433 case MOD_UNLOAD: 1434 if (pcmsg_unrhdr != NULL) { 1435 delete_unrhdr(pcmsg_unrhdr); 1436 pcmsg_unrhdr = NULL; 1437 } 1438 break; 1439 case MOD_SHUTDOWN: 1440 break; 1441 default: 1442 ret = ENOTSUP; 1443 } 1444 1445 return ret; 1446 } 1447 1448 DEV_MODULE(sound, sound_modevent, NULL); 1449 MODULE_VERSION(sound, SOUND_MODVER); 1450