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/devfs.h> 41 #include <sys/limits.h> 42 #include <sys/sysctl.h> 43 44 #include "feeder_if.h" 45 46 SND_DECLARE_FILE("$FreeBSD: head/sys/dev/sound/pcm/sound.c 274035 2014-11-03 11:11:45Z bapt $"); 47 48 devclass_t pcm_devclass; 49 50 int pcm_veto_load = 1; 51 52 int snd_unit = -1; 53 TUNABLE_INT("hw.snd.default_unit", &snd_unit); 54 55 static int snd_unit_auto = -1; 56 TUNABLE_INT("hw.snd.default_auto", &snd_unit_auto); 57 SYSCTL_INT(_hw_snd, OID_AUTO, default_auto, CTLFLAG_RW, 58 &snd_unit_auto, 0, "assign default unit to a newly attached device"); 59 60 int snd_maxautovchans = 16; 61 /* XXX: a tunable implies that we may need more than one sound channel before 62 the system can change a sysctl (/etc/sysctl.conf), do we really need 63 this? */ 64 TUNABLE_INT("hw.snd.maxautovchans", &snd_maxautovchans); 65 66 SYSCTL_NODE(_hw, OID_AUTO, snd, CTLFLAG_RD, 0, "Sound driver"); 67 68 /* 69 * XXX I've had enough with people not telling proper version/arch 70 * while reporting problems, not after 387397913213th questions/requests. 71 */ 72 static char snd_driver_version[] = 73 __XSTRING(SND_DRV_VERSION)"/"MACHINE_ARCH; 74 SYSCTL_STRING(_hw_snd, OID_AUTO, version, CTLFLAG_RD, &snd_driver_version, 75 0, "driver version/arch"); 76 77 /** 78 * @brief Unit number allocator for syncgroup IDs 79 */ 80 struct unrhdr *pcmsg_unrhdr = NULL; 81 82 static int 83 sndstat_prepare_pcm(SNDSTAT_PREPARE_PCM_ARGS) 84 { 85 SNDSTAT_PREPARE_PCM_BEGIN(); 86 SNDSTAT_PREPARE_PCM_END(); 87 } 88 89 void * 90 snd_mtxcreate(const char *desc, const char *type) 91 { 92 struct lock *m; 93 94 m = kmalloc(sizeof(*m), M_DEVBUF, M_WAITOK | M_ZERO); 95 lockinit(m, desc, 0, LK_CANRECURSE); 96 return m; 97 } 98 99 void 100 snd_mtxfree(void *m) 101 { 102 struct lock *mtx = m; 103 104 lockuninit(mtx); 105 kfree(mtx, M_DEVBUF); 106 } 107 108 void 109 snd_mtxassert(void *m) 110 { 111 #ifdef INVARIANTS 112 struct lock *lk = m; 113 114 KKASSERT(lockstatus(lk, curthread) == LK_EXCLUSIVE); 115 #endif 116 } 117 118 int 119 snd_setup_intr(device_t dev, struct resource *res, int flags, driver_intr_t hand, void *param, void **cookiep) 120 { 121 struct snddev_info *d; 122 123 flags &= INTR_MPSAFE; 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, hand, param, cookiep, NULL); 129 } 130 131 static void 132 pcm_clonereset(struct snddev_info *d) 133 { 134 int cmax; 135 136 PCM_BUSYASSERT(d); 137 138 cmax = d->playcount + d->reccount - 1; 139 if (d->pvchancount > 0) 140 cmax += max(d->pvchancount, snd_maxautovchans) - 1; 141 if (d->rvchancount > 0) 142 cmax += max(d->rvchancount, snd_maxautovchans) - 1; 143 if (cmax > PCMMAXCLONE) 144 cmax = PCMMAXCLONE; 145 (void)snd_clone_gc(d->clones); 146 (void)snd_clone_setmaxunit(d->clones, cmax); 147 } 148 149 int 150 pcm_setvchans(struct snddev_info *d, int direction, int newcnt, int num) 151 { 152 struct pcm_channel *c, *ch, *nch; 153 struct pcmchan_caps *caps; 154 int i, err, vcnt; 155 156 PCM_BUSYASSERT(d); 157 158 if ((direction == PCMDIR_PLAY && d->playcount < 1) || 159 (direction == PCMDIR_REC && d->reccount < 1)) 160 return (ENODEV); 161 162 if (!(d->flags & SD_F_AUTOVCHAN)) 163 return (EINVAL); 164 165 if (newcnt < 0 || newcnt > SND_MAXVCHANS) 166 return (E2BIG); 167 168 if (direction == PCMDIR_PLAY) 169 vcnt = d->pvchancount; 170 else if (direction == PCMDIR_REC) 171 vcnt = d->rvchancount; 172 else 173 return (EINVAL); 174 175 if (newcnt > vcnt) { 176 KASSERT(num == -1 || 177 (num >= 0 && num < SND_MAXVCHANS && (newcnt - 1) == vcnt), 178 ("bogus vchan_create() request num=%d newcnt=%d vcnt=%d", 179 num, newcnt, vcnt)); 180 /* add new vchans - find a parent channel first */ 181 ch = NULL; 182 CHN_FOREACH(c, d, channels.pcm) { 183 CHN_LOCK(c); 184 if (c->direction == direction && 185 ((c->flags & CHN_F_HAS_VCHAN) || (vcnt == 0 && 186 c->refcount < 1 && 187 !(c->flags & (CHN_F_BUSY | CHN_F_VIRTUAL))))) { 188 /* 189 * Reuse hw channel with vchans already 190 * created. 191 */ 192 if (c->flags & CHN_F_HAS_VCHAN) { 193 ch = c; 194 break; 195 } 196 /* 197 * No vchans ever created, look for 198 * channels with supported formats. 199 */ 200 caps = chn_getcaps(c); 201 if (caps == NULL) { 202 CHN_UNLOCK(c); 203 continue; 204 } 205 for (i = 0; caps->fmtlist[i] != 0; i++) { 206 if (caps->fmtlist[i] & AFMT_CONVERTIBLE) 207 break; 208 } 209 if (caps->fmtlist[i] != 0) { 210 ch = c; 211 break; 212 } 213 } 214 CHN_UNLOCK(c); 215 } 216 if (ch == NULL) 217 return (EBUSY); 218 ch->flags |= CHN_F_BUSY; 219 err = 0; 220 while (err == 0 && newcnt > vcnt) { 221 err = vchan_create(ch, num); 222 if (err == 0) 223 vcnt++; 224 else if (err == E2BIG && newcnt > vcnt) 225 device_printf(d->dev, 226 "%s: err=%d Maximum channel reached.\n", 227 __func__, err); 228 } 229 if (vcnt == 0) 230 ch->flags &= ~CHN_F_BUSY; 231 CHN_UNLOCK(ch); 232 if (err != 0) 233 return (err); 234 else 235 pcm_clonereset(d); 236 } else if (newcnt < vcnt) { 237 KASSERT(num == -1, 238 ("bogus vchan_destroy() request num=%d", num)); 239 CHN_FOREACH(c, d, channels.pcm) { 240 CHN_LOCK(c); 241 if (c->direction != direction || 242 CHN_EMPTY(c, children) || 243 !(c->flags & CHN_F_HAS_VCHAN)) { 244 CHN_UNLOCK(c); 245 continue; 246 } 247 CHN_FOREACH_SAFE(ch, c, nch, children) { 248 CHN_LOCK(ch); 249 if (vcnt == 1 && c->refcount > 0) { 250 CHN_UNLOCK(ch); 251 break; 252 } 253 if (!(ch->flags & CHN_F_BUSY) && 254 ch->refcount < 1) { 255 err = vchan_destroy(ch); 256 if (err == 0) 257 vcnt--; 258 } else 259 CHN_UNLOCK(ch); 260 if (vcnt == newcnt) 261 break; 262 } 263 CHN_UNLOCK(c); 264 break; 265 } 266 pcm_clonereset(d); 267 } 268 269 return (0); 270 } 271 272 /* return error status and a locked channel */ 273 int 274 pcm_chnalloc(struct snddev_info *d, struct pcm_channel **ch, int direction, 275 pid_t pid, char *comm, int devunit) 276 { 277 struct pcm_channel *c; 278 int err, vchancount, vchan_num; 279 280 KASSERT(d != NULL && ch != NULL && (devunit == -1 || 281 !(devunit & ~(SND_U_MASK | SND_D_MASK | SND_C_MASK))) && 282 (direction == PCMDIR_PLAY || direction == PCMDIR_REC), 283 ("%s(): invalid d=%p ch=%p direction=%d pid=%d devunit=%d", 284 __func__, d, ch, direction, pid, devunit)); 285 PCM_BUSYASSERT(d); 286 287 /* Double check again. */ 288 if (devunit != -1) { 289 switch (snd_unit2d(devunit)) { 290 case SND_DEV_DSPHW_PLAY: 291 case SND_DEV_DSPHW_VPLAY: 292 if (direction != PCMDIR_PLAY) 293 return (ENOTSUP); 294 break; 295 case SND_DEV_DSPHW_REC: 296 case SND_DEV_DSPHW_VREC: 297 if (direction != PCMDIR_REC) 298 return (ENOTSUP); 299 break; 300 default: 301 if (!(direction == PCMDIR_PLAY || 302 direction == PCMDIR_REC)) 303 return (ENOTSUP); 304 break; 305 } 306 } 307 308 *ch = NULL; 309 vchan_num = 0; 310 vchancount = (direction == PCMDIR_PLAY) ? d->pvchancount : 311 d->rvchancount; 312 313 retry_chnalloc: 314 err = ENOTSUP; 315 /* scan for a free channel */ 316 CHN_FOREACH(c, d, channels.pcm) { 317 CHN_LOCK(c); 318 if (devunit == -1 && c->direction == direction && 319 (c->flags & CHN_F_VIRTUAL)) { 320 if (vchancount < snd_maxautovchans && 321 vchan_num < CHN_CHAN(c)) { 322 CHN_UNLOCK(c); 323 goto vchan_alloc; 324 } 325 vchan_num++; 326 } 327 if (c->direction == direction && !(c->flags & CHN_F_BUSY) && 328 (devunit == -1 || devunit == -2 || c->unit == devunit)) { 329 c->flags |= CHN_F_BUSY; 330 c->pid = pid; 331 strlcpy(c->comm, (comm != NULL) ? comm : 332 CHN_COMM_UNKNOWN, sizeof(c->comm)); 333 *ch = c; 334 return (0); 335 } else if (c->unit == devunit) { 336 if (c->direction != direction) 337 err = ENOTSUP; 338 else if (c->flags & CHN_F_BUSY) 339 err = EBUSY; 340 else 341 err = EINVAL; 342 CHN_UNLOCK(c); 343 return (err); 344 } else if ((devunit == -1 || devunit == -2) && 345 c->direction == direction && (c->flags & CHN_F_BUSY)) 346 err = EBUSY; 347 CHN_UNLOCK(c); 348 } 349 350 if (devunit == -2) 351 return (err); 352 353 vchan_alloc: 354 /* no channel available */ 355 if (devunit == -1 || snd_unit2d(devunit) == SND_DEV_DSPHW_VPLAY || 356 snd_unit2d(devunit) == SND_DEV_DSPHW_VREC) { 357 if (!(vchancount > 0 && vchancount < snd_maxautovchans) && 358 (devunit == -1 || snd_unit2c(devunit) < snd_maxautovchans)) 359 return (err); 360 err = pcm_setvchans(d, direction, vchancount + 1, 361 (devunit == -1) ? -1 : snd_unit2c(devunit)); 362 if (err == 0) { 363 if (devunit == -1) 364 devunit = -2; 365 goto retry_chnalloc; 366 } 367 } 368 369 return (err); 370 } 371 372 /* release a locked channel and unlock it */ 373 int 374 pcm_chnrelease(struct pcm_channel *c) 375 { 376 PCM_BUSYASSERT(c->parentsnddev); 377 CHN_LOCKASSERT(c); 378 379 c->flags &= ~CHN_F_BUSY; 380 c->pid = -1; 381 strlcpy(c->comm, CHN_COMM_UNUSED, sizeof(c->comm)); 382 CHN_UNLOCK(c); 383 384 return (0); 385 } 386 387 int 388 pcm_chnref(struct pcm_channel *c, int ref) 389 { 390 PCM_BUSYASSERT(c->parentsnddev); 391 CHN_LOCKASSERT(c); 392 393 c->refcount += ref; 394 395 return (c->refcount); 396 } 397 398 int 399 pcm_inprog(struct snddev_info *d, int delta) 400 { 401 PCM_LOCKASSERT(d); 402 403 d->inprog += delta; 404 405 return (d->inprog); 406 } 407 408 static void 409 pcm_setmaxautovchans(struct snddev_info *d, int num) 410 { 411 PCM_BUSYASSERT(d); 412 413 if (num < 0) 414 return; 415 416 if (num >= 0 && d->pvchancount > num) 417 (void)pcm_setvchans(d, PCMDIR_PLAY, num, -1); 418 else if (num > 0 && d->pvchancount == 0) 419 (void)pcm_setvchans(d, PCMDIR_PLAY, 1, -1); 420 421 if (num >= 0 && d->rvchancount > num) 422 (void)pcm_setvchans(d, PCMDIR_REC, num, -1); 423 else if (num > 0 && d->rvchancount == 0) 424 (void)pcm_setvchans(d, PCMDIR_REC, 1, -1); 425 426 pcm_clonereset(d); 427 } 428 429 static int 430 sysctl_hw_snd_default_unit(SYSCTL_HANDLER_ARGS) 431 { 432 struct snddev_info *d; 433 int error, unit; 434 cdev_t old_d; 435 436 unit = snd_unit; 437 error = sysctl_handle_int(oidp, &unit, 0, req); 438 if (error == 0 && req->newptr != NULL) { 439 if ((old_d = devfs_find_device_by_name("dsp%d", snd_unit))) 440 destroy_dev_alias(old_d, "dsp"); 441 if ((old_d = devfs_find_device_by_name("mixer%d", snd_unit))) 442 destroy_dev_alias(old_d, "mixer"); 443 d = devclass_get_softc(pcm_devclass, unit); 444 if (!PCM_REGISTERED(d) || CHN_EMPTY(d, channels.pcm)) 445 return EINVAL; 446 error = make_dev_alias(d->dsp_clonedev, "dsp"); 447 if (error) 448 goto done; 449 error = make_dev_alias(d->mixer_dev, "mixer"); 450 snd_unit = unit; 451 snd_unit_auto = 0; 452 } 453 done: 454 return (error); 455 } 456 457 /* XXX: do we need a way to let the user change the default unit? */ 458 SYSCTL_PROC(_hw_snd, OID_AUTO, default_unit, 459 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_ANYBODY, 460 0, sizeof(int), sysctl_hw_snd_default_unit, "I", 461 "default sound device"); 462 463 static int 464 sysctl_hw_snd_maxautovchans(SYSCTL_HANDLER_ARGS) 465 { 466 struct snddev_info *d; 467 int i, v, error; 468 469 v = snd_maxautovchans; 470 error = sysctl_handle_int(oidp, &v, 0, req); 471 if (error == 0 && req->newptr != NULL) { 472 if (v < 0) 473 v = 0; 474 if (v > SND_MAXVCHANS) 475 v = SND_MAXVCHANS; 476 snd_maxautovchans = v; 477 for (i = 0; pcm_devclass != NULL && 478 i < devclass_get_maxunit(pcm_devclass); i++) { 479 d = devclass_get_softc(pcm_devclass, i); 480 if (!PCM_REGISTERED(d)) 481 continue; 482 PCM_ACQUIRE_QUICK(d); 483 pcm_setmaxautovchans(d, v); 484 PCM_RELEASE_QUICK(d); 485 } 486 } 487 return (error); 488 } 489 SYSCTL_PROC(_hw_snd, OID_AUTO, maxautovchans, CTLTYPE_INT | CTLFLAG_RW, 490 0, sizeof(int), sysctl_hw_snd_maxautovchans, "I", "maximum virtual channel"); 491 492 struct pcm_channel * 493 pcm_chn_create(struct snddev_info *d, struct pcm_channel *parent, kobj_class_t cls, int dir, int num, void *devinfo) 494 { 495 struct pcm_channel *ch; 496 int direction, err, rpnum, *pnum, max; 497 int udc, device, chan; 498 char *dirs, *devname, buf[CHN_NAMELEN]; 499 500 PCM_BUSYASSERT(d); 501 PCM_LOCKASSERT(d); 502 KASSERT(num >= -1, ("invalid num=%d", num)); 503 504 505 switch (dir) { 506 case PCMDIR_PLAY: 507 dirs = "play"; 508 direction = PCMDIR_PLAY; 509 pnum = &d->playcount; 510 device = SND_DEV_DSPHW_PLAY; 511 max = SND_MAXHWCHAN; 512 break; 513 case PCMDIR_PLAY_VIRTUAL: 514 dirs = "virtual"; 515 direction = PCMDIR_PLAY; 516 pnum = &d->pvchancount; 517 device = SND_DEV_DSPHW_VPLAY; 518 max = SND_MAXVCHANS; 519 break; 520 case PCMDIR_REC: 521 dirs = "record"; 522 direction = PCMDIR_REC; 523 pnum = &d->reccount; 524 device = SND_DEV_DSPHW_REC; 525 max = SND_MAXHWCHAN; 526 break; 527 case PCMDIR_REC_VIRTUAL: 528 dirs = "virtual"; 529 direction = PCMDIR_REC; 530 pnum = &d->rvchancount; 531 device = SND_DEV_DSPHW_VREC; 532 max = SND_MAXVCHANS; 533 break; 534 default: 535 return (NULL); 536 } 537 538 chan = (num == -1) ? 0 : num; 539 540 if (*pnum >= max || chan >= max) 541 return (NULL); 542 543 rpnum = 0; 544 545 CHN_FOREACH(ch, d, channels.pcm) { 546 if (CHN_DEV(ch) != device) 547 continue; 548 if (chan == CHN_CHAN(ch)) { 549 if (num != -1) { 550 device_printf(d->dev, 551 "channel num=%d allocated!\n", chan); 552 return (NULL); 553 } 554 chan++; 555 if (chan >= max) { 556 device_printf(d->dev, 557 "chan=%d > %d\n", chan, max); 558 return (NULL); 559 } 560 } 561 rpnum++; 562 } 563 564 if (*pnum != rpnum) { 565 device_printf(d->dev, 566 "%s(): WARNING: pnum screwed : dirs=%s pnum=%d rpnum=%d\n", 567 __func__, dirs, *pnum, rpnum); 568 return (NULL); 569 } 570 571 udc = snd_mkunit(device_get_unit(d->dev), device, chan); 572 devname = dsp_unit2name(buf, sizeof(buf), udc); 573 574 if (devname == NULL) { 575 device_printf(d->dev, 576 "Failed to query device name udc=0x%08x\n", udc); 577 return (NULL); 578 } 579 580 PCM_UNLOCK(d); 581 ch = kmalloc(sizeof(*ch), M_DEVBUF, M_WAITOK | M_ZERO); 582 ch->methods = kobj_create(cls, M_DEVBUF, M_WAITOK | M_ZERO); 583 ch->unit = udc; 584 ch->pid = -1; 585 strlcpy(ch->comm, CHN_COMM_UNUSED, sizeof(ch->comm)); 586 ch->parentsnddev = d; 587 ch->parentchannel = parent; 588 ch->dev = d->dev; 589 ch->trigger = PCMTRIG_STOP; 590 ksnprintf(ch->name, sizeof(ch->name), "%s:%s:%s", 591 device_get_nameunit(ch->dev), dirs, devname); 592 593 err = chn_init(ch, devinfo, dir, direction); 594 PCM_LOCK(d); 595 if (err) { 596 device_printf(d->dev, "chn_init(%s) failed: err = %d\n", 597 ch->name, err); 598 kobj_delete(ch->methods, M_DEVBUF); 599 kfree(ch, M_DEVBUF); 600 return (NULL); 601 } 602 603 return (ch); 604 } 605 606 int 607 pcm_chn_destroy(struct pcm_channel *ch) 608 { 609 struct snddev_info *d; 610 int err; 611 612 d = ch->parentsnddev; 613 PCM_BUSYASSERT(d); 614 615 err = chn_kill(ch); 616 if (err) { 617 device_printf(ch->dev, "chn_kill(%s) failed, err = %d\n", 618 ch->name, err); 619 return (err); 620 } 621 622 kobj_delete(ch->methods, M_DEVBUF); 623 kfree(ch, M_DEVBUF); 624 625 return (0); 626 } 627 628 int 629 pcm_chn_add(struct snddev_info *d, struct pcm_channel *ch) 630 { 631 PCM_BUSYASSERT(d); 632 PCM_LOCKASSERT(d); 633 KASSERT(ch != NULL && (ch->direction == PCMDIR_PLAY || 634 ch->direction == PCMDIR_REC), ("Invalid pcm channel")); 635 636 CHN_INSERT_SORT_ASCEND(d, ch, channels.pcm); 637 638 switch (CHN_DEV(ch)) { 639 case SND_DEV_DSPHW_PLAY: 640 d->playcount++; 641 break; 642 case SND_DEV_DSPHW_VPLAY: 643 d->pvchancount++; 644 break; 645 case SND_DEV_DSPHW_REC: 646 d->reccount++; 647 break; 648 case SND_DEV_DSPHW_VREC: 649 d->rvchancount++; 650 break; 651 default: 652 break; 653 } 654 655 d->devcount++; 656 657 return (0); 658 } 659 660 int 661 pcm_chn_remove(struct snddev_info *d, struct pcm_channel *ch) 662 { 663 struct pcm_channel *tmp; 664 665 PCM_BUSYASSERT(d); 666 PCM_LOCKASSERT(d); 667 668 tmp = NULL; 669 670 CHN_FOREACH(tmp, d, channels.pcm) { 671 if (tmp == ch) 672 break; 673 } 674 675 if (tmp != ch) 676 return (EINVAL); 677 678 CHN_REMOVE(d, ch, channels.pcm); 679 680 switch (CHN_DEV(ch)) { 681 case SND_DEV_DSPHW_PLAY: 682 d->playcount--; 683 break; 684 case SND_DEV_DSPHW_VPLAY: 685 d->pvchancount--; 686 break; 687 case SND_DEV_DSPHW_REC: 688 d->reccount--; 689 break; 690 case SND_DEV_DSPHW_VREC: 691 d->rvchancount--; 692 break; 693 default: 694 break; 695 } 696 697 d->devcount--; 698 699 return (0); 700 } 701 702 int 703 pcm_addchan(device_t dev, int dir, kobj_class_t cls, void *devinfo) 704 { 705 struct snddev_info *d = device_get_softc(dev); 706 struct pcm_channel *ch; 707 int err; 708 709 PCM_BUSYASSERT(d); 710 711 PCM_LOCK(d); 712 ch = pcm_chn_create(d, NULL, cls, dir, -1, devinfo); 713 if (!ch) { 714 device_printf(d->dev, "pcm_chn_create(%s, %d, %p) failed\n", 715 cls->name, dir, devinfo); 716 PCM_UNLOCK(d); 717 return (ENODEV); 718 } 719 720 err = pcm_chn_add(d, ch); 721 PCM_UNLOCK(d); 722 if (err) { 723 device_printf(d->dev, "pcm_chn_add(%s) failed, err=%d\n", 724 ch->name, err); 725 pcm_chn_destroy(ch); 726 } 727 728 return (err); 729 } 730 731 static int 732 pcm_killchan(device_t dev) 733 { 734 struct snddev_info *d = device_get_softc(dev); 735 struct pcm_channel *ch; 736 int error; 737 738 PCM_BUSYASSERT(d); 739 740 ch = CHN_FIRST(d, channels.pcm); 741 742 PCM_LOCK(d); 743 error = pcm_chn_remove(d, ch); 744 PCM_UNLOCK(d); 745 if (error) 746 return (error); 747 return (pcm_chn_destroy(ch)); 748 } 749 750 static int 751 pcm_best_unit(int old) 752 { 753 struct snddev_info *d; 754 int i, best, bestprio, prio; 755 cdev_t old_d; 756 757 best = -1; 758 bestprio = -100; 759 for (i = 0; pcm_devclass != NULL && 760 i < devclass_get_maxunit(pcm_devclass); i++) { 761 d = devclass_get_softc(pcm_devclass, i); 762 if (!PCM_REGISTERED(d)) 763 continue; 764 prio = 0; 765 if (d->playcount == 0) 766 prio -= 10; 767 if (d->reccount == 0) 768 prio -= 2; 769 if (prio > bestprio || (prio == bestprio && i == old)) { 770 best = i; 771 bestprio = prio; 772 } 773 } 774 775 /* Change default devfs entries to new best device if needed */ 776 if (snd_unit != best) { 777 if ((old_d = devfs_find_device_by_name("dsp%d", snd_unit))) 778 destroy_dev_alias(old_d, "dsp"); 779 if ((old_d = devfs_find_device_by_name("mixer%d", snd_unit))) 780 destroy_dev_alias(old_d, "mixer"); 781 d = devclass_get_softc(pcm_devclass, best); 782 make_dev_alias(d->dsp_clonedev, "dsp"); 783 make_dev_alias(d->mixer_dev, "mixer"); 784 } 785 786 return (best); 787 } 788 789 int 790 pcm_setstatus(device_t dev, char *str) 791 { 792 struct snddev_info *d = device_get_softc(dev); 793 794 PCM_BUSYASSERT(d); 795 796 if (d->playcount == 0 || d->reccount == 0) 797 d->flags |= SD_F_SIMPLEX; 798 799 if ((d->playcount > 0 || d->reccount > 0) && 800 !(d->flags & SD_F_AUTOVCHAN)) { 801 d->flags |= SD_F_AUTOVCHAN; 802 vchan_initsys(dev); 803 } 804 805 pcm_setmaxautovchans(d, snd_maxautovchans); 806 807 strlcpy(d->status, str, SND_STATUSLEN); 808 809 PCM_LOCK(d); 810 811 /* Last stage, enable cloning. */ 812 if (d->clones != NULL) 813 (void)snd_clone_enable(d->clones); 814 815 /* Done, we're ready.. */ 816 d->flags |= SD_F_REGISTERED; 817 818 PCM_RELEASE(d); 819 820 PCM_UNLOCK(d); 821 822 if (snd_unit_auto < 0) 823 snd_unit_auto = (snd_unit < 0) ? 1 : 0; 824 if (snd_unit < 0 || snd_unit_auto > 1) 825 snd_unit = device_get_unit(dev); 826 else if (snd_unit_auto == 1) 827 snd_unit = pcm_best_unit(snd_unit); 828 829 return (0); 830 } 831 832 uint32_t 833 pcm_getflags(device_t dev) 834 { 835 struct snddev_info *d = device_get_softc(dev); 836 837 return d->flags; 838 } 839 840 void 841 pcm_setflags(device_t dev, uint32_t val) 842 { 843 struct snddev_info *d = device_get_softc(dev); 844 845 d->flags = val; 846 } 847 848 void * 849 pcm_getdevinfo(device_t dev) 850 { 851 struct snddev_info *d = device_get_softc(dev); 852 853 return d->devinfo; 854 } 855 856 unsigned int 857 pcm_getbuffersize(device_t dev, unsigned int minbufsz, unsigned int deflt, unsigned int maxbufsz) 858 { 859 struct snddev_info *d = device_get_softc(dev); 860 int sz, x; 861 862 sz = 0; 863 if (resource_int_value(device_get_name(dev), device_get_unit(dev), "buffersize", &sz) == 0) { 864 x = sz; 865 RANGE(sz, minbufsz, maxbufsz); 866 if (x != sz) 867 device_printf(dev, "'buffersize=%d' hint is out of range (%d-%d), using %d\n", x, minbufsz, maxbufsz, sz); 868 x = minbufsz; 869 while (x < sz) 870 x <<= 1; 871 if (x > sz) 872 x >>= 1; 873 if (x != sz) { 874 device_printf(dev, "'buffersize=%d' hint is not a power of 2, using %d\n", sz, x); 875 sz = x; 876 } 877 } else { 878 sz = deflt; 879 } 880 881 d->bufsz = sz; 882 883 return sz; 884 } 885 886 static int 887 sysctl_dev_pcm_bitperfect(SYSCTL_HANDLER_ARGS) 888 { 889 struct snddev_info *d; 890 int err, val; 891 892 d = oidp->oid_arg1; 893 if (!PCM_REGISTERED(d)) 894 return (ENODEV); 895 896 PCM_LOCK(d); 897 PCM_WAIT(d); 898 val = (d->flags & SD_F_BITPERFECT) ? 1 : 0; 899 PCM_ACQUIRE(d); 900 PCM_UNLOCK(d); 901 902 err = sysctl_handle_int(oidp, &val, 0, req); 903 904 if (err == 0 && req->newptr != NULL) { 905 if (!(val == 0 || val == 1)) { 906 PCM_RELEASE_QUICK(d); 907 return (EINVAL); 908 } 909 910 PCM_LOCK(d); 911 912 d->flags &= ~SD_F_BITPERFECT; 913 d->flags |= (val != 0) ? SD_F_BITPERFECT : 0; 914 915 PCM_RELEASE(d); 916 PCM_UNLOCK(d); 917 } else 918 PCM_RELEASE_QUICK(d); 919 920 return (err); 921 } 922 923 #ifdef SND_DEBUG 924 static int 925 sysctl_dev_pcm_clone_flags(SYSCTL_HANDLER_ARGS) 926 { 927 struct snddev_info *d; 928 uint32_t flags; 929 int err; 930 931 d = oidp->oid_arg1; 932 if (!PCM_REGISTERED(d) || d->clones == NULL) 933 return (ENODEV); 934 935 PCM_ACQUIRE_QUICK(d); 936 937 flags = snd_clone_getflags(d->clones); 938 err = sysctl_handle_int(oidp, &flags, 0, req); 939 940 if (err == 0 && req->newptr != NULL) { 941 if (flags & ~SND_CLONE_MASK) 942 err = EINVAL; 943 else 944 (void)snd_clone_setflags(d->clones, flags); 945 } 946 947 PCM_RELEASE_QUICK(d); 948 949 return (err); 950 } 951 952 static int 953 sysctl_dev_pcm_clone_deadline(SYSCTL_HANDLER_ARGS) 954 { 955 struct snddev_info *d; 956 int err, deadline; 957 958 d = oidp->oid_arg1; 959 if (!PCM_REGISTERED(d) || d->clones == NULL) 960 return (ENODEV); 961 962 PCM_ACQUIRE_QUICK(d); 963 964 deadline = snd_clone_getdeadline(d->clones); 965 err = sysctl_handle_int(oidp, &deadline, 0, req); 966 967 if (err == 0 && req->newptr != NULL) { 968 if (deadline < 0) 969 err = EINVAL; 970 else 971 (void)snd_clone_setdeadline(d->clones, deadline); 972 } 973 974 PCM_RELEASE_QUICK(d); 975 976 return (err); 977 } 978 979 static int 980 sysctl_dev_pcm_clone_gc(SYSCTL_HANDLER_ARGS) 981 { 982 struct snddev_info *d; 983 int err, val; 984 985 d = oidp->oid_arg1; 986 if (!PCM_REGISTERED(d) || d->clones == NULL) 987 return (ENODEV); 988 989 val = 0; 990 err = sysctl_handle_int(oidp, &val, 0, req); 991 992 if (err == 0 && req->newptr != NULL && val != 0) { 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", val); 998 } 999 1000 return (err); 1001 } 1002 1003 static int 1004 sysctl_hw_snd_clone_gc(SYSCTL_HANDLER_ARGS) 1005 { 1006 struct snddev_info *d; 1007 int i, err, val; 1008 1009 val = 0; 1010 err = sysctl_handle_int(oidp, &val, 0, req); 1011 1012 if (err == 0 && req->newptr != NULL && val != 0) { 1013 for (i = 0; pcm_devclass != NULL && 1014 i < devclass_get_maxunit(pcm_devclass); i++) { 1015 d = devclass_get_softc(pcm_devclass, i); 1016 if (!PCM_REGISTERED(d) || d->clones == NULL) 1017 continue; 1018 PCM_ACQUIRE_QUICK(d); 1019 val = snd_clone_gc(d->clones); 1020 PCM_RELEASE_QUICK(d); 1021 if (bootverbose != 0 || snd_verbose > 3) 1022 device_printf(d->dev, "clone gc: pruned=%d\n", 1023 val); 1024 } 1025 } 1026 1027 return (err); 1028 } 1029 SYSCTL_PROC(_hw_snd, OID_AUTO, clone_gc, CTLTYPE_INT | CTLFLAG_RW, 1030 0, sizeof(int), sysctl_hw_snd_clone_gc, "I", 1031 "global clone garbage collector"); 1032 #endif 1033 1034 extern struct devfs_bitmap devfs_dsp_clone_bitmap; 1035 1036 int 1037 pcm_register(device_t dev, void *devinfo, int numplay, int numrec) 1038 { 1039 struct snddev_info *d; 1040 int i; 1041 1042 if (pcm_veto_load) { 1043 device_printf(dev, "disabled due to an error while initialising: %d\n", pcm_veto_load); 1044 1045 return EINVAL; 1046 } 1047 1048 if (device_get_unit(dev) > PCMMAXUNIT) { 1049 device_printf(dev, "PCMMAXUNIT reached : unit=%d > %d\n", 1050 device_get_unit(dev), PCMMAXUNIT); 1051 device_printf(dev, 1052 "Use 'hw.snd.maxunit' tunable to raise the limit.\n"); 1053 return ENODEV; 1054 } 1055 1056 d = device_get_softc(dev); 1057 d->dev = dev; 1058 d->lock = snd_mtxcreate(device_get_nameunit(dev), "sound cdev"); 1059 cv_init(&d->cv, device_get_nameunit(dev)); 1060 PCM_ACQUIRE_QUICK(d); 1061 dsp_cdevinfo_init(d); 1062 #if 0 1063 /* 1064 * d->flags should be cleared by the allocator of the softc. 1065 * We cannot clear this field here because several devices set 1066 * this flag before calling pcm_register(). 1067 */ 1068 d->flags = 0; 1069 #endif 1070 i = 0; 1071 if (resource_int_value(device_get_name(dev), device_get_unit(dev), 1072 "vpc", &i) != 0 || i != 0) 1073 d->flags |= SD_F_VPC; 1074 1075 if (resource_int_value(device_get_name(dev), device_get_unit(dev), 1076 "bitperfect", &i) == 0 && i != 0) 1077 d->flags |= SD_F_BITPERFECT; 1078 1079 d->devinfo = devinfo; 1080 d->devcount = 0; 1081 d->reccount = 0; 1082 d->playcount = 0; 1083 d->pvchancount = 0; 1084 d->rvchancount = 0; 1085 d->pvchanrate = 0; 1086 d->pvchanformat = 0; 1087 d->rvchanrate = 0; 1088 d->rvchanformat = 0; 1089 d->inprog = 0; 1090 1091 /* 1092 * Create clone manager, disabled by default. Cloning will be 1093 * enabled during final stage of driver initialization through 1094 * pcm_setstatus(). 1095 */ 1096 d->clones = snd_clone_create(SND_U_MASK | SND_D_MASK, PCMMAXCLONE, 1097 SND_CLONE_DEADLINE_DEFAULT, SND_CLONE_WAITOK | 1098 SND_CLONE_GC_ENABLE | SND_CLONE_GC_UNREF | 1099 SND_CLONE_GC_LASTREF | SND_CLONE_GC_EXPIRED); 1100 1101 CHN_INIT(d, channels.pcm); 1102 CHN_INIT(d, channels.pcm.busy); 1103 CHN_INIT(d, channels.pcm.opened); 1104 1105 /* XXX This is incorrect, but lets play along for now. */ 1106 if ((numplay == 0 || numrec == 0) && numplay != numrec) 1107 d->flags |= SD_F_SIMPLEX; 1108 1109 sysctl_ctx_init(&d->play_sysctl_ctx); 1110 d->play_sysctl_tree = SYSCTL_ADD_NODE(&d->play_sysctl_ctx, 1111 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, "play", 1112 CTLFLAG_RD, 0, "playback channels node"); 1113 sysctl_ctx_init(&d->rec_sysctl_ctx); 1114 d->rec_sysctl_tree = SYSCTL_ADD_NODE(&d->rec_sysctl_ctx, 1115 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, "rec", 1116 CTLFLAG_RD, 0, "record channels node"); 1117 /* XXX: an user should be able to set this with a control tool, the 1118 sysadmin then needs min+max sysctls for this */ 1119 SYSCTL_ADD_UINT(device_get_sysctl_ctx(dev), 1120 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), 1121 OID_AUTO, "buffersize", CTLFLAG_RD, &d->bufsz, 0, "allocated buffer size"); 1122 SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev), 1123 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, 1124 "bitperfect", CTLTYPE_INT | CTLFLAG_RW, d, sizeof(d), 1125 sysctl_dev_pcm_bitperfect, "I", 1126 "bit-perfect playback/recording (0=disable, 1=enable)"); 1127 #ifdef SND_DEBUG 1128 SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev), 1129 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, 1130 "clone_flags", CTLTYPE_UINT | CTLFLAG_RW, d, sizeof(d), 1131 sysctl_dev_pcm_clone_flags, "IU", 1132 "clone flags"); 1133 SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev), 1134 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, 1135 "clone_deadline", CTLTYPE_INT | CTLFLAG_RW, d, sizeof(d), 1136 sysctl_dev_pcm_clone_deadline, "I", 1137 "clone expiration deadline (ms)"); 1138 SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev), 1139 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, 1140 "clone_gc", CTLTYPE_INT | CTLFLAG_RW, d, sizeof(d), 1141 sysctl_dev_pcm_clone_gc, "I", 1142 "clone garbage collector"); 1143 #endif 1144 1145 if (numplay > 0 || numrec > 0) { 1146 d->flags |= SD_F_AUTOVCHAN; 1147 vchan_initsys(dev); 1148 } 1149 1150 if (d->flags & SD_F_EQ) 1151 feeder_eq_initsys(dev); 1152 1153 /* XXX use make_autoclone_dev? */ 1154 /* XXX PCMMAXCHAN can be created for regular channels */ 1155 #if 1 1156 d->dsp_clonedev = make_dev(&dsp_ops, 1157 PCMMKMINOR(device_get_unit(dev), SND_DEV_DSP, 0), 1158 UID_ROOT, GID_WHEEL, 0666, "dsp%d", 1159 device_get_unit(dev)); 1160 devfs_clone_handler_add(devtoname(d->dsp_clonedev), dsp_clone); 1161 #else 1162 d->dsp_clonedev = make_autoclone_dev(&dsp_ops, 1163 &DEVFS_CLONE_BITMAP(dsp), dsp_clone, 1164 UID_ROOT, GID_WHEEL, 0666, "dsp%d", 1165 device_get_unit(dev)); 1166 #endif 1167 1168 sndstat_register(dev, d->status, sndstat_prepare_pcm); 1169 1170 return 0; 1171 } 1172 1173 int 1174 pcm_unregister(device_t dev) 1175 { 1176 struct snddev_info *d; 1177 struct pcm_channel *ch; 1178 struct thread *td; 1179 1180 td = curthread; 1181 d = device_get_softc(dev); 1182 1183 if (!PCM_ALIVE(d)) { 1184 device_printf(dev, "unregister: device not configured\n"); 1185 return (0); 1186 } 1187 1188 if (sndstat_acquire(td) != 0) { 1189 device_printf(dev, "unregister: sndstat busy\n"); 1190 return (EBUSY); 1191 } 1192 1193 PCM_LOCK(d); 1194 PCM_WAIT(d); 1195 1196 if (d->inprog != 0) { 1197 device_printf(dev, "unregister: operation in progress\n"); 1198 PCM_UNLOCK(d); 1199 sndstat_release(td); 1200 return (EBUSY); 1201 } 1202 1203 PCM_ACQUIRE(d); 1204 PCM_UNLOCK(d); 1205 1206 CHN_FOREACH(ch, d, channels.pcm) { 1207 CHN_LOCK(ch); 1208 if (ch->refcount > 0) { 1209 device_printf(dev, 1210 "unregister: channel %s busy (pid %d)\n", 1211 ch->name, ch->pid); 1212 CHN_UNLOCK(ch); 1213 PCM_RELEASE_QUICK(d); 1214 sndstat_release(td); 1215 return (EBUSY); 1216 } 1217 CHN_UNLOCK(ch); 1218 } 1219 1220 if (d->clones != NULL) { 1221 if (snd_clone_busy(d->clones) != 0) { 1222 device_printf(dev, "unregister: clone busy\n"); 1223 PCM_RELEASE_QUICK(d); 1224 sndstat_release(td); 1225 return (EBUSY); 1226 } else { 1227 PCM_LOCK(d); 1228 (void)snd_clone_disable(d->clones); 1229 PCM_UNLOCK(d); 1230 } 1231 } 1232 1233 if (mixer_uninit(dev) == EBUSY) { 1234 device_printf(dev, "unregister: mixer busy\n"); 1235 PCM_LOCK(d); 1236 if (d->clones != NULL) 1237 (void)snd_clone_enable(d->clones); 1238 PCM_RELEASE(d); 1239 PCM_UNLOCK(d); 1240 sndstat_release(td); 1241 return (EBUSY); 1242 } 1243 1244 PCM_LOCK(d); 1245 d->flags |= SD_F_DYING; 1246 d->flags &= ~SD_F_REGISTERED; 1247 PCM_UNLOCK(d); 1248 1249 /* 1250 * No lock being held, so this thing can be flushed without 1251 * stucking into devdrn oblivion. 1252 */ 1253 if (d->clones != NULL) { 1254 snd_clone_destroy(d->clones); 1255 d->clones = NULL; 1256 } 1257 1258 if (d->play_sysctl_tree != NULL) { 1259 sysctl_ctx_free(&d->play_sysctl_ctx); 1260 d->play_sysctl_tree = NULL; 1261 } 1262 if (d->rec_sysctl_tree != NULL) { 1263 sysctl_ctx_free(&d->rec_sysctl_ctx); 1264 d->rec_sysctl_tree = NULL; 1265 } 1266 1267 while (!CHN_EMPTY(d, channels.pcm)) 1268 pcm_killchan(dev); 1269 1270 dsp_cdevinfo_flush(d); 1271 1272 PCM_LOCK(d); 1273 PCM_RELEASE(d); 1274 cv_destroy(&d->cv); 1275 PCM_UNLOCK(d); 1276 snd_mtxfree(d->lock); 1277 sndstat_unregister(dev); 1278 sndstat_release(td); 1279 1280 if (snd_unit == device_get_unit(dev)) { 1281 snd_unit = pcm_best_unit(-1); 1282 if (snd_unit_auto == 0) 1283 snd_unit_auto = 1; 1284 } 1285 1286 return (0); 1287 } 1288 1289 /************************************************************************/ 1290 1291 /** 1292 * @brief Handle OSSv4 SNDCTL_SYSINFO ioctl. 1293 * 1294 * @param si Pointer to oss_sysinfo struct where information about the 1295 * sound subsystem will be written/copied. 1296 * 1297 * This routine returns information about the sound system, such as the 1298 * current OSS version, number of audio, MIDI, and mixer drivers, etc. 1299 * Also includes a bitmask showing which of the above types of devices 1300 * are open (busy). 1301 * 1302 * @note 1303 * Calling threads must not hold any snddev_info or pcm_channel locks. 1304 * 1305 * @author Ryan Beasley <ryanb@FreeBSD.org> 1306 */ 1307 void 1308 sound_oss_sysinfo(oss_sysinfo *si) 1309 { 1310 static char si_product[] = "FreeBSD native OSS ABI"; 1311 static char si_version[] = __XSTRING(__FreeBSD_version); 1312 static char si_license[] = "BSD"; 1313 static int intnbits = sizeof(int) * 8; /* Better suited as macro? 1314 Must pester a C guru. */ 1315 1316 struct snddev_info *d; 1317 struct pcm_channel *c; 1318 int i, j, ncards; 1319 1320 ncards = 0; 1321 1322 strlcpy(si->product, si_product, sizeof(si->product)); 1323 strlcpy(si->version, si_version, sizeof(si->version)); 1324 si->versionnum = SOUND_VERSION; 1325 strlcpy(si->license, si_license, sizeof(si->license)); 1326 1327 /* 1328 * Iterate over PCM devices and their channels, gathering up data 1329 * for the numaudios, ncards, and openedaudio fields. 1330 */ 1331 si->numaudios = 0; 1332 bzero((void *)&si->openedaudio, sizeof(si->openedaudio)); 1333 1334 j = 0; 1335 1336 for (i = 0; pcm_devclass != NULL && 1337 i < devclass_get_maxunit(pcm_devclass); i++) { 1338 d = devclass_get_softc(pcm_devclass, i); 1339 if (!PCM_REGISTERED(d)) 1340 continue; 1341 1342 /* XXX Need Giant magic entry ??? */ 1343 1344 /* See note in function's docblock */ 1345 PCM_UNLOCKASSERT(d); 1346 PCM_LOCK(d); 1347 1348 si->numaudios += d->devcount; 1349 ++ncards; 1350 1351 CHN_FOREACH(c, d, channels.pcm) { 1352 CHN_UNLOCKASSERT(c); 1353 CHN_LOCK(c); 1354 if (c->flags & CHN_F_BUSY) 1355 si->openedaudio[j / intnbits] |= 1356 (1 << (j % intnbits)); 1357 CHN_UNLOCK(c); 1358 j++; 1359 } 1360 1361 PCM_UNLOCK(d); 1362 } 1363 si->numaudioengines = si->numaudios; 1364 1365 si->numsynths = 0; /* OSSv4 docs: this field is obsolete */ 1366 /** 1367 * @todo Collect num{midis,timers}. 1368 * 1369 * Need access to sound/midi/midi.c::midistat_lock in order 1370 * to safely touch midi_devices and get a head count of, well, 1371 * MIDI devices. midistat_lock is a global static (i.e., local to 1372 * midi.c), but midi_devices is a regular global; should the mutex 1373 * be publicized, or is there another way to get this information? 1374 * 1375 * NB: MIDI/sequencer stuff is currently on hold. 1376 */ 1377 si->nummidis = 0; 1378 si->numtimers = 0; 1379 si->nummixers = mixer_count; 1380 si->numcards = ncards; 1381 /* OSSv4 docs: Intended only for test apps; API doesn't 1382 really have much of a concept of cards. Shouldn't be 1383 used by applications. */ 1384 1385 /** 1386 * @todo Fill in "busy devices" fields. 1387 * 1388 * si->openedmidi = " MIDI devices 1389 */ 1390 bzero((void *)&si->openedmidi, sizeof(si->openedmidi)); 1391 1392 /* 1393 * Si->filler is a reserved array, but according to docs each 1394 * element should be set to -1. 1395 */ 1396 for (i = 0; i < sizeof(si->filler)/sizeof(si->filler[0]); i++) 1397 si->filler[i] = -1; 1398 } 1399 1400 int 1401 sound_oss_card_info(oss_card_info *si) 1402 { 1403 struct snddev_info *d; 1404 int i, ncards; 1405 1406 ncards = 0; 1407 1408 for (i = 0; pcm_devclass != NULL && 1409 i < devclass_get_maxunit(pcm_devclass); i++) { 1410 d = devclass_get_softc(pcm_devclass, i); 1411 if (!PCM_REGISTERED(d)) 1412 continue; 1413 1414 if (ncards++ != si->card) 1415 continue; 1416 1417 PCM_UNLOCKASSERT(d); 1418 PCM_LOCK(d); 1419 1420 strlcpy(si->shortname, device_get_nameunit(d->dev), 1421 sizeof(si->shortname)); 1422 strlcpy(si->longname, device_get_desc(d->dev), 1423 sizeof(si->longname)); 1424 strlcpy(si->hw_info, d->status, sizeof(si->hw_info)); 1425 si->intr_count = si->ack_count = 0; 1426 1427 PCM_UNLOCK(d); 1428 1429 return (0); 1430 } 1431 return (ENXIO); 1432 } 1433 1434 /************************************************************************/ 1435 1436 static int 1437 sound_modevent(module_t mod, int type, void *data) 1438 { 1439 int ret; 1440 #if 0 1441 return (midi_modevent(mod, type, data)); 1442 #else 1443 ret = 0; 1444 1445 switch(type) { 1446 case MOD_LOAD: 1447 pcmsg_unrhdr = new_unrhdr(1, INT_MAX, NULL); 1448 break; 1449 case MOD_UNLOAD: 1450 ret = sndstat_acquire(curthread); 1451 if (ret != 0) 1452 break; 1453 if (pcmsg_unrhdr != NULL) { 1454 delete_unrhdr(pcmsg_unrhdr); 1455 pcmsg_unrhdr = NULL; 1456 } 1457 break; 1458 case MOD_SHUTDOWN: 1459 break; 1460 default: 1461 ret = ENOTSUP; 1462 } 1463 1464 return ret; 1465 #endif 1466 } 1467 1468 DEV_MODULE(sound, sound_modevent, NULL); 1469 MODULE_VERSION(sound, SOUND_MODVER); 1470