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FreeBSD/Linux Kernel Cross Reference
sys/dev/sound/pcm/dsp.c
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1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 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 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #ifdef HAVE_KERNEL_OPTION_HEADERS 32 #include "opt_snd.h" 33 #endif 34 35 #include <dev/sound/pcm/sound.h> 36 #include <sys/ctype.h> 37 #include <sys/lock.h> 38 #include <sys/rwlock.h> 39 #include <sys/sysent.h> 40 41 #include <vm/vm.h> 42 #include <vm/vm_object.h> 43 #include <vm/vm_page.h> 44 #include <vm/vm_pager.h> 45 46 SND_DECLARE_FILE("$FreeBSD$"); 47 48 static int dsp_mmap_allow_prot_exec = 0; 49 SYSCTL_INT(_hw_snd, OID_AUTO, compat_linux_mmap, CTLFLAG_RWTUN, 50 &dsp_mmap_allow_prot_exec, 0, 51 "linux mmap compatibility (-1=force disable 0=auto 1=force enable)"); 52 53 static int dsp_basename_clone = 1; 54 SYSCTL_INT(_hw_snd, OID_AUTO, basename_clone, CTLFLAG_RWTUN, 55 &dsp_basename_clone, 0, 56 "DSP basename cloning (0: Disable; 1: Enabled)"); 57 58 struct dsp_cdevinfo { 59 struct pcm_channel *rdch, *wrch; 60 struct pcm_channel *volch; 61 int busy, simplex; 62 TAILQ_ENTRY(dsp_cdevinfo) link; 63 }; 64 65 #define PCM_RDCH(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->rdch) 66 #define PCM_WRCH(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->wrch) 67 #define PCM_VOLCH(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->volch) 68 #define PCM_SIMPLEX(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->simplex) 69 70 #define DSP_CDEVINFO_CACHESIZE 8 71 72 #define DSP_REGISTERED(x, y) (PCM_REGISTERED(x) && \ 73 (y) != NULL && (y)->si_drv1 != NULL) 74 75 #define OLDPCM_IOCTL 76 77 static d_open_t dsp_open; 78 static d_close_t dsp_close; 79 static d_read_t dsp_read; 80 static d_write_t dsp_write; 81 static d_ioctl_t dsp_ioctl; 82 static d_poll_t dsp_poll; 83 static d_mmap_t dsp_mmap; 84 static d_mmap_single_t dsp_mmap_single; 85 86 struct cdevsw dsp_cdevsw = { 87 .d_version = D_VERSION, 88 .d_open = dsp_open, 89 .d_close = dsp_close, 90 .d_read = dsp_read, 91 .d_write = dsp_write, 92 .d_ioctl = dsp_ioctl, 93 .d_poll = dsp_poll, 94 .d_mmap = dsp_mmap, 95 .d_mmap_single = dsp_mmap_single, 96 .d_name = "dsp", 97 }; 98 99 static eventhandler_tag dsp_ehtag = NULL; 100 static int dsp_umax = -1; 101 static int dsp_cmax = -1; 102 103 static int dsp_oss_syncgroup(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_syncgroup *group); 104 static int dsp_oss_syncstart(int sg_id); 105 static int dsp_oss_policy(struct pcm_channel *wrch, struct pcm_channel *rdch, int policy); 106 static int dsp_oss_cookedmode(struct pcm_channel *wrch, struct pcm_channel *rdch, int enabled); 107 static int dsp_oss_getchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map); 108 static int dsp_oss_setchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map); 109 static int dsp_oss_getchannelmask(struct pcm_channel *wrch, struct pcm_channel *rdch, int *mask); 110 #ifdef OSSV4_EXPERIMENT 111 static int dsp_oss_getlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label); 112 static int dsp_oss_setlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label); 113 static int dsp_oss_getsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song); 114 static int dsp_oss_setsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song); 115 static int dsp_oss_setname(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *name); 116 #endif 117 118 static struct snddev_info * 119 dsp_get_info(struct cdev *dev) 120 { 121 return (devclass_get_softc(pcm_devclass, PCMUNIT(dev))); 122 } 123 124 static uint32_t 125 dsp_get_flags(struct cdev *dev) 126 { 127 device_t bdev; 128 129 bdev = devclass_get_device(pcm_devclass, PCMUNIT(dev)); 130 131 return ((bdev != NULL) ? pcm_getflags(bdev) : 0xffffffff); 132 } 133 134 static void 135 dsp_set_flags(struct cdev *dev, uint32_t flags) 136 { 137 device_t bdev; 138 139 bdev = devclass_get_device(pcm_devclass, PCMUNIT(dev)); 140 141 if (bdev != NULL) 142 pcm_setflags(bdev, flags); 143 } 144 145 /* 146 * return the channels associated with an open device instance. 147 * lock channels specified. 148 */ 149 static int 150 getchns(struct cdev *dev, struct pcm_channel **rdch, struct pcm_channel **wrch, 151 uint32_t prio) 152 { 153 struct snddev_info *d; 154 struct pcm_channel *ch; 155 uint32_t flags; 156 157 if (PCM_SIMPLEX(dev) != 0) { 158 d = dsp_get_info(dev); 159 if (!PCM_REGISTERED(d)) 160 return (ENXIO); 161 PCM_LOCK(d); 162 PCM_WAIT(d); 163 PCM_ACQUIRE(d); 164 /* 165 * Note: order is important - 166 * pcm flags -> prio query flags -> wild guess 167 */ 168 ch = NULL; 169 flags = dsp_get_flags(dev); 170 if (flags & SD_F_PRIO_WR) { 171 ch = PCM_RDCH(dev); 172 PCM_RDCH(dev) = NULL; 173 } else if (flags & SD_F_PRIO_RD) { 174 ch = PCM_WRCH(dev); 175 PCM_WRCH(dev) = NULL; 176 } else if (prio & SD_F_PRIO_WR) { 177 ch = PCM_RDCH(dev); 178 PCM_RDCH(dev) = NULL; 179 flags |= SD_F_PRIO_WR; 180 } else if (prio & SD_F_PRIO_RD) { 181 ch = PCM_WRCH(dev); 182 PCM_WRCH(dev) = NULL; 183 flags |= SD_F_PRIO_RD; 184 } else if (PCM_WRCH(dev) != NULL) { 185 ch = PCM_RDCH(dev); 186 PCM_RDCH(dev) = NULL; 187 flags |= SD_F_PRIO_WR; 188 } else if (PCM_RDCH(dev) != NULL) { 189 ch = PCM_WRCH(dev); 190 PCM_WRCH(dev) = NULL; 191 flags |= SD_F_PRIO_RD; 192 } 193 PCM_SIMPLEX(dev) = 0; 194 dsp_set_flags(dev, flags); 195 if (ch != NULL) { 196 CHN_LOCK(ch); 197 pcm_chnref(ch, -1); 198 pcm_chnrelease(ch); 199 } 200 PCM_RELEASE(d); 201 PCM_UNLOCK(d); 202 } 203 204 *rdch = PCM_RDCH(dev); 205 *wrch = PCM_WRCH(dev); 206 207 if (*rdch != NULL && (prio & SD_F_PRIO_RD)) 208 CHN_LOCK(*rdch); 209 if (*wrch != NULL && (prio & SD_F_PRIO_WR)) 210 CHN_LOCK(*wrch); 211 212 return (0); 213 } 214 215 /* unlock specified channels */ 216 static void 217 relchns(struct cdev *dev, struct pcm_channel *rdch, struct pcm_channel *wrch, 218 uint32_t prio) 219 { 220 if (wrch != NULL && (prio & SD_F_PRIO_WR)) 221 CHN_UNLOCK(wrch); 222 if (rdch != NULL && (prio & SD_F_PRIO_RD)) 223 CHN_UNLOCK(rdch); 224 } 225 226 static void 227 dsp_cdevinfo_alloc(struct cdev *dev, 228 struct pcm_channel *rdch, struct pcm_channel *wrch, 229 struct pcm_channel *volch) 230 { 231 struct snddev_info *d; 232 struct dsp_cdevinfo *cdi; 233 int simplex; 234 235 d = dsp_get_info(dev); 236 237 KASSERT(PCM_REGISTERED(d) && dev != NULL && dev->si_drv1 == NULL && 238 ((rdch == NULL && wrch == NULL) || rdch != wrch), 239 ("bogus %s(), what are you trying to accomplish here?", __func__)); 240 PCM_BUSYASSERT(d); 241 PCM_LOCKASSERT(d); 242 243 simplex = (dsp_get_flags(dev) & SD_F_SIMPLEX) ? 1 : 0; 244 245 /* 246 * Scan for free instance entry and put it into the end of list. 247 * Create new one if necessary. 248 */ 249 TAILQ_FOREACH(cdi, &d->dsp_cdevinfo_pool, link) { 250 if (cdi->busy != 0) 251 break; 252 cdi->rdch = rdch; 253 cdi->wrch = wrch; 254 cdi->volch = volch; 255 cdi->simplex = simplex; 256 cdi->busy = 1; 257 TAILQ_REMOVE(&d->dsp_cdevinfo_pool, cdi, link); 258 TAILQ_INSERT_TAIL(&d->dsp_cdevinfo_pool, cdi, link); 259 dev->si_drv1 = cdi; 260 return; 261 } 262 PCM_UNLOCK(d); 263 cdi = malloc(sizeof(*cdi), M_DEVBUF, M_WAITOK | M_ZERO); 264 PCM_LOCK(d); 265 cdi->rdch = rdch; 266 cdi->wrch = wrch; 267 cdi->volch = volch; 268 cdi->simplex = simplex; 269 cdi->busy = 1; 270 TAILQ_INSERT_TAIL(&d->dsp_cdevinfo_pool, cdi, link); 271 dev->si_drv1 = cdi; 272 } 273 274 static void 275 dsp_cdevinfo_free(struct cdev *dev) 276 { 277 struct snddev_info *d; 278 struct dsp_cdevinfo *cdi, *tmp; 279 uint32_t flags; 280 int i; 281 282 d = dsp_get_info(dev); 283 284 KASSERT(PCM_REGISTERED(d) && dev != NULL && dev->si_drv1 != NULL && 285 PCM_RDCH(dev) == NULL && PCM_WRCH(dev) == NULL && 286 PCM_VOLCH(dev) == NULL, 287 ("bogus %s(), what are you trying to accomplish here?", __func__)); 288 PCM_BUSYASSERT(d); 289 PCM_LOCKASSERT(d); 290 291 cdi = dev->si_drv1; 292 dev->si_drv1 = NULL; 293 cdi->rdch = NULL; 294 cdi->wrch = NULL; 295 cdi->volch = NULL; 296 cdi->simplex = 0; 297 cdi->busy = 0; 298 299 /* 300 * Once it is free, move it back to the beginning of list for 301 * faster new entry allocation. 302 */ 303 TAILQ_REMOVE(&d->dsp_cdevinfo_pool, cdi, link); 304 TAILQ_INSERT_HEAD(&d->dsp_cdevinfo_pool, cdi, link); 305 306 /* 307 * Scan the list, cache free entries up to DSP_CDEVINFO_CACHESIZE. 308 * Reset simplex flags. 309 */ 310 flags = dsp_get_flags(dev) & ~SD_F_PRIO_SET; 311 i = DSP_CDEVINFO_CACHESIZE; 312 TAILQ_FOREACH_SAFE(cdi, &d->dsp_cdevinfo_pool, link, tmp) { 313 if (cdi->busy != 0) { 314 if (cdi->simplex == 0) { 315 if (cdi->rdch != NULL) 316 flags |= SD_F_PRIO_RD; 317 if (cdi->wrch != NULL) 318 flags |= SD_F_PRIO_WR; 319 } 320 } else { 321 if (i == 0) { 322 TAILQ_REMOVE(&d->dsp_cdevinfo_pool, cdi, link); 323 free(cdi, M_DEVBUF); 324 } else 325 i--; 326 } 327 } 328 dsp_set_flags(dev, flags); 329 } 330 331 void 332 dsp_cdevinfo_init(struct snddev_info *d) 333 { 334 struct dsp_cdevinfo *cdi; 335 int i; 336 337 KASSERT(d != NULL, ("NULL snddev_info")); 338 PCM_BUSYASSERT(d); 339 PCM_UNLOCKASSERT(d); 340 341 TAILQ_INIT(&d->dsp_cdevinfo_pool); 342 for (i = 0; i < DSP_CDEVINFO_CACHESIZE; i++) { 343 cdi = malloc(sizeof(*cdi), M_DEVBUF, M_WAITOK | M_ZERO); 344 TAILQ_INSERT_HEAD(&d->dsp_cdevinfo_pool, cdi, link); 345 } 346 } 347 348 void 349 dsp_cdevinfo_flush(struct snddev_info *d) 350 { 351 struct dsp_cdevinfo *cdi, *tmp; 352 353 KASSERT(d != NULL, ("NULL snddev_info")); 354 PCM_BUSYASSERT(d); 355 PCM_UNLOCKASSERT(d); 356 357 cdi = TAILQ_FIRST(&d->dsp_cdevinfo_pool); 358 while (cdi != NULL) { 359 tmp = TAILQ_NEXT(cdi, link); 360 free(cdi, M_DEVBUF); 361 cdi = tmp; 362 } 363 TAILQ_INIT(&d->dsp_cdevinfo_pool); 364 } 365 366 /* duplex / simplex cdev type */ 367 enum { 368 DSP_CDEV_TYPE_RDONLY, /* simplex read-only (record) */ 369 DSP_CDEV_TYPE_WRONLY, /* simplex write-only (play) */ 370 DSP_CDEV_TYPE_RDWR /* duplex read, write, or both */ 371 }; 372 373 enum { 374 DSP_CDEV_VOLCTL_NONE, 375 DSP_CDEV_VOLCTL_READ, 376 DSP_CDEV_VOLCTL_WRITE 377 }; 378 379 #define DSP_F_VALID(x) ((x) & (FREAD | FWRITE)) 380 #define DSP_F_DUPLEX(x) (((x) & (FREAD | FWRITE)) == (FREAD | FWRITE)) 381 #define DSP_F_SIMPLEX(x) (!DSP_F_DUPLEX(x)) 382 #define DSP_F_READ(x) ((x) & FREAD) 383 #define DSP_F_WRITE(x) ((x) & FWRITE) 384 385 static const struct { 386 int type; 387 char *name; 388 char *sep; 389 char *alias; 390 int use_sep; 391 int hw; 392 int max; 393 int volctl; 394 uint32_t fmt, spd; 395 int query; 396 } dsp_cdevs[] = { 397 { SND_DEV_DSP, "dsp", ".", NULL, 0, 0, 0, 0, 398 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED, 399 DSP_CDEV_TYPE_RDWR }, 400 { SND_DEV_AUDIO, "audio", ".", NULL, 0, 0, 0, 0, 401 SND_FORMAT(AFMT_MU_LAW, 1, 0), DSP_DEFAULT_SPEED, 402 DSP_CDEV_TYPE_RDWR }, 403 { SND_DEV_DSP16, "dspW", ".", NULL, 0, 0, 0, 0, 404 SND_FORMAT(AFMT_S16_LE, 1, 0), DSP_DEFAULT_SPEED, 405 DSP_CDEV_TYPE_RDWR }, 406 { SND_DEV_DSPHW_PLAY, "dsp", ".p", NULL, 1, 1, SND_MAXHWCHAN, 1, 407 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_WRONLY }, 408 { SND_DEV_DSPHW_VPLAY, "dsp", ".vp", NULL, 1, 1, SND_MAXVCHANS, 1, 409 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_WRONLY }, 410 { SND_DEV_DSPHW_REC, "dsp", ".r", NULL, 1, 1, SND_MAXHWCHAN, 1, 411 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_RDONLY }, 412 { SND_DEV_DSPHW_VREC, "dsp", ".vr", NULL, 1, 1, SND_MAXVCHANS, 1, 413 SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_RDONLY }, 414 { SND_DEV_DSPHW_CD, "dspcd", ".", NULL, 0, 0, 0, 0, 415 SND_FORMAT(AFMT_S16_LE, 2, 0), 44100, DSP_CDEV_TYPE_RDWR }, 416 /* Low priority, OSSv4 aliases. */ 417 { SND_DEV_DSP, "dsp_ac3", ".", "dsp", 0, 0, 0, 0, 418 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED, 419 DSP_CDEV_TYPE_RDWR }, 420 { SND_DEV_DSP, "dsp_mmap", ".", "dsp", 0, 0, 0, 0, 421 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED, 422 DSP_CDEV_TYPE_RDWR }, 423 { SND_DEV_DSP, "dsp_multich", ".", "dsp", 0, 0, 0, 0, 424 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED, 425 DSP_CDEV_TYPE_RDWR }, 426 { SND_DEV_DSP, "dsp_spdifout", ".", "dsp", 0, 0, 0, 0, 427 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED, 428 DSP_CDEV_TYPE_RDWR }, 429 { SND_DEV_DSP, "dsp_spdifin", ".", "dsp", 0, 0, 0, 0, 430 SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED, 431 DSP_CDEV_TYPE_RDWR }, 432 }; 433 434 #define DSP_FIXUP_ERROR() do { \ 435 prio = dsp_get_flags(i_dev); \ 436 if (!DSP_F_VALID(flags)) \ 437 error = EINVAL; \ 438 if (!DSP_F_DUPLEX(flags) && \ 439 ((DSP_F_READ(flags) && d->reccount == 0) || \ 440 (DSP_F_WRITE(flags) && d->playcount == 0))) \ 441 error = ENOTSUP; \ 442 else if (!DSP_F_DUPLEX(flags) && (prio & SD_F_SIMPLEX) && \ 443 ((DSP_F_READ(flags) && (prio & SD_F_PRIO_WR)) || \ 444 (DSP_F_WRITE(flags) && (prio & SD_F_PRIO_RD)))) \ 445 error = EBUSY; \ 446 else if (DSP_REGISTERED(d, i_dev)) \ 447 error = EBUSY; \ 448 } while (0) 449 450 static int 451 dsp_open(struct cdev *i_dev, int flags, int mode, struct thread *td) 452 { 453 struct pcm_channel *rdch, *wrch; 454 struct snddev_info *d; 455 uint32_t fmt, spd, prio, volctl; 456 int i, error, rderror, wrerror, devtype, wdevunit, rdevunit; 457 458 /* Kind of impossible.. */ 459 if (i_dev == NULL || td == NULL) 460 return (ENODEV); 461 462 d = dsp_get_info(i_dev); 463 if (PCM_DETACHING(d) || !PCM_REGISTERED(d)) 464 return (EBADF); 465 466 PCM_GIANT_ENTER(d); 467 468 /* Lock snddev so nobody else can monkey with it. */ 469 PCM_LOCK(d); 470 PCM_WAIT(d); 471 472 /* 473 * Try to acquire cloned device before someone else pick it. 474 * ENODEV means this is not a cloned droids. 475 */ 476 error = snd_clone_acquire(i_dev); 477 if (!(error == 0 || error == ENODEV)) { 478 DSP_FIXUP_ERROR(); 479 PCM_UNLOCK(d); 480 PCM_GIANT_EXIT(d); 481 return (error); 482 } 483 484 error = 0; 485 DSP_FIXUP_ERROR(); 486 487 if (error != 0) { 488 (void)snd_clone_release(i_dev); 489 PCM_UNLOCK(d); 490 PCM_GIANT_EXIT(d); 491 return (error); 492 } 493 494 /* 495 * That is just enough. Acquire and unlock pcm lock so 496 * the other will just have to wait until we finish doing 497 * everything. 498 */ 499 PCM_ACQUIRE(d); 500 PCM_UNLOCK(d); 501 502 devtype = PCMDEV(i_dev); 503 wdevunit = -1; 504 rdevunit = -1; 505 fmt = 0; 506 spd = 0; 507 volctl = DSP_CDEV_VOLCTL_NONE; 508 509 for (i = 0; i < (sizeof(dsp_cdevs) / sizeof(dsp_cdevs[0])); i++) { 510 if (devtype != dsp_cdevs[i].type || dsp_cdevs[i].alias != NULL) 511 continue; 512 /* 513 * Volume control only valid for DSPHW devices, 514 * and it must be opened in opposite direction be it 515 * simplex or duplex. Anything else will be handled 516 * as usual. 517 */ 518 if (dsp_cdevs[i].query == DSP_CDEV_TYPE_WRONLY) { 519 if (dsp_cdevs[i].volctl != 0 && 520 DSP_F_READ(flags)) { 521 volctl = DSP_CDEV_VOLCTL_WRITE; 522 flags &= ~FREAD; 523 flags |= FWRITE; 524 } 525 if (DSP_F_READ(flags)) { 526 (void)snd_clone_release(i_dev); 527 PCM_RELEASE_QUICK(d); 528 PCM_GIANT_EXIT(d); 529 return (ENOTSUP); 530 } 531 wdevunit = dev2unit(i_dev); 532 } else if (dsp_cdevs[i].query == DSP_CDEV_TYPE_RDONLY) { 533 if (dsp_cdevs[i].volctl != 0 && 534 DSP_F_WRITE(flags)) { 535 volctl = DSP_CDEV_VOLCTL_READ; 536 flags &= ~FWRITE; 537 flags |= FREAD; 538 } 539 if (DSP_F_WRITE(flags)) { 540 (void)snd_clone_release(i_dev); 541 PCM_RELEASE_QUICK(d); 542 PCM_GIANT_EXIT(d); 543 return (ENOTSUP); 544 } 545 rdevunit = dev2unit(i_dev); 546 } 547 fmt = dsp_cdevs[i].fmt; 548 spd = dsp_cdevs[i].spd; 549 break; 550 } 551 552 /* No matching devtype? */ 553 if (fmt == 0 || spd == 0) 554 panic("impossible devtype %d", devtype); 555 556 rdch = NULL; 557 wrch = NULL; 558 rderror = 0; 559 wrerror = 0; 560 561 /* 562 * if we get here, the open request is valid- either: 563 * * we were previously not open 564 * * we were open for play xor record and the opener wants 565 * the non-open direction 566 */ 567 if (DSP_F_READ(flags)) { 568 /* open for read */ 569 rderror = pcm_chnalloc(d, &rdch, PCMDIR_REC, 570 td->td_proc->p_pid, td->td_proc->p_comm, rdevunit); 571 572 if (rderror == 0 && chn_reset(rdch, fmt, spd) != 0) 573 rderror = ENXIO; 574 575 if (volctl == DSP_CDEV_VOLCTL_READ) 576 rderror = 0; 577 578 if (rderror != 0) { 579 if (rdch != NULL) 580 pcm_chnrelease(rdch); 581 if (!DSP_F_DUPLEX(flags)) { 582 (void)snd_clone_release(i_dev); 583 PCM_RELEASE_QUICK(d); 584 PCM_GIANT_EXIT(d); 585 return (rderror); 586 } 587 rdch = NULL; 588 } else if (volctl == DSP_CDEV_VOLCTL_READ) { 589 if (rdch != NULL) { 590 pcm_chnref(rdch, 1); 591 pcm_chnrelease(rdch); 592 } 593 } else { 594 if (flags & O_NONBLOCK) 595 rdch->flags |= CHN_F_NBIO; 596 if (flags & O_EXCL) 597 rdch->flags |= CHN_F_EXCLUSIVE; 598 pcm_chnref(rdch, 1); 599 if (volctl == DSP_CDEV_VOLCTL_NONE) 600 chn_vpc_reset(rdch, SND_VOL_C_PCM, 0); 601 CHN_UNLOCK(rdch); 602 } 603 } 604 605 if (DSP_F_WRITE(flags)) { 606 /* open for write */ 607 wrerror = pcm_chnalloc(d, &wrch, PCMDIR_PLAY, 608 td->td_proc->p_pid, td->td_proc->p_comm, wdevunit); 609 610 if (wrerror == 0 && chn_reset(wrch, fmt, spd) != 0) 611 wrerror = ENXIO; 612 613 if (volctl == DSP_CDEV_VOLCTL_WRITE) 614 wrerror = 0; 615 616 if (wrerror != 0) { 617 if (wrch != NULL) 618 pcm_chnrelease(wrch); 619 if (!DSP_F_DUPLEX(flags)) { 620 if (rdch != NULL) { 621 /* 622 * Lock, deref and release previously 623 * created record channel 624 */ 625 CHN_LOCK(rdch); 626 pcm_chnref(rdch, -1); 627 pcm_chnrelease(rdch); 628 } 629 (void)snd_clone_release(i_dev); 630 PCM_RELEASE_QUICK(d); 631 PCM_GIANT_EXIT(d); 632 return (wrerror); 633 } 634 wrch = NULL; 635 } else if (volctl == DSP_CDEV_VOLCTL_WRITE) { 636 if (wrch != NULL) { 637 pcm_chnref(wrch, 1); 638 pcm_chnrelease(wrch); 639 } 640 } else { 641 if (flags & O_NONBLOCK) 642 wrch->flags |= CHN_F_NBIO; 643 if (flags & O_EXCL) 644 wrch->flags |= CHN_F_EXCLUSIVE; 645 pcm_chnref(wrch, 1); 646 if (volctl == DSP_CDEV_VOLCTL_NONE) 647 chn_vpc_reset(wrch, SND_VOL_C_PCM, 0); 648 CHN_UNLOCK(wrch); 649 } 650 } 651 652 PCM_LOCK(d); 653 654 /* 655 * We're done. Allocate channels information for this cdev. 656 */ 657 switch (volctl) { 658 case DSP_CDEV_VOLCTL_READ: 659 KASSERT(wrch == NULL, ("wrch=%p not null!", wrch)); 660 dsp_cdevinfo_alloc(i_dev, NULL, NULL, rdch); 661 break; 662 case DSP_CDEV_VOLCTL_WRITE: 663 KASSERT(rdch == NULL, ("rdch=%p not null!", rdch)); 664 dsp_cdevinfo_alloc(i_dev, NULL, NULL, wrch); 665 break; 666 case DSP_CDEV_VOLCTL_NONE: 667 default: 668 if (wrch == NULL && rdch == NULL) { 669 (void)snd_clone_release(i_dev); 670 PCM_RELEASE(d); 671 PCM_UNLOCK(d); 672 PCM_GIANT_EXIT(d); 673 if (wrerror != 0) 674 return (wrerror); 675 if (rderror != 0) 676 return (rderror); 677 return (EINVAL); 678 } 679 dsp_cdevinfo_alloc(i_dev, rdch, wrch, NULL); 680 if (rdch != NULL) 681 CHN_INSERT_HEAD(d, rdch, channels.pcm.opened); 682 if (wrch != NULL) 683 CHN_INSERT_HEAD(d, wrch, channels.pcm.opened); 684 break; 685 } 686 687 /* 688 * Increase clone refcount for its automatic garbage collector. 689 */ 690 (void)snd_clone_ref(i_dev); 691 692 PCM_RELEASE(d); 693 PCM_UNLOCK(d); 694 695 PCM_GIANT_LEAVE(d); 696 697 return (0); 698 } 699 700 static int 701 dsp_close(struct cdev *i_dev, int flags, int mode, struct thread *td) 702 { 703 struct pcm_channel *rdch, *wrch, *volch; 704 struct snddev_info *d; 705 int sg_ids, rdref, wdref; 706 707 d = dsp_get_info(i_dev); 708 if (!DSP_REGISTERED(d, i_dev)) 709 return (EBADF); 710 711 PCM_GIANT_ENTER(d); 712 713 PCM_LOCK(d); 714 PCM_WAIT(d); 715 PCM_ACQUIRE(d); 716 717 rdch = PCM_RDCH(i_dev); 718 wrch = PCM_WRCH(i_dev); 719 volch = PCM_VOLCH(i_dev); 720 721 PCM_RDCH(i_dev) = NULL; 722 PCM_WRCH(i_dev) = NULL; 723 PCM_VOLCH(i_dev) = NULL; 724 725 rdref = -1; 726 wdref = -1; 727 728 if (volch != NULL) { 729 if (volch == rdch) 730 rdref--; 731 else if (volch == wrch) 732 wdref--; 733 else { 734 CHN_LOCK(volch); 735 pcm_chnref(volch, -1); 736 CHN_UNLOCK(volch); 737 } 738 } 739 740 if (rdch != NULL) 741 CHN_REMOVE(d, rdch, channels.pcm.opened); 742 if (wrch != NULL) 743 CHN_REMOVE(d, wrch, channels.pcm.opened); 744 745 if (rdch != NULL || wrch != NULL) { 746 PCM_UNLOCK(d); 747 if (rdch != NULL) { 748 /* 749 * The channel itself need not be locked because: 750 * a) Adding a channel to a syncgroup happens only 751 * in dsp_ioctl(), which cannot run concurrently 752 * to dsp_close(). 753 * b) The syncmember pointer (sm) is protected by 754 * the global syncgroup list lock. 755 * c) A channel can't just disappear, invalidating 756 * pointers, unless it's closed/dereferenced 757 * first. 758 */ 759 PCM_SG_LOCK(); 760 sg_ids = chn_syncdestroy(rdch); 761 PCM_SG_UNLOCK(); 762 if (sg_ids != 0) 763 free_unr(pcmsg_unrhdr, sg_ids); 764 765 CHN_LOCK(rdch); 766 pcm_chnref(rdch, rdref); 767 chn_abort(rdch); /* won't sleep */ 768 rdch->flags &= ~(CHN_F_RUNNING | CHN_F_MMAP | 769 CHN_F_DEAD | CHN_F_EXCLUSIVE); 770 chn_reset(rdch, 0, 0); 771 pcm_chnrelease(rdch); 772 } 773 if (wrch != NULL) { 774 /* 775 * Please see block above. 776 */ 777 PCM_SG_LOCK(); 778 sg_ids = chn_syncdestroy(wrch); 779 PCM_SG_UNLOCK(); 780 if (sg_ids != 0) 781 free_unr(pcmsg_unrhdr, sg_ids); 782 783 CHN_LOCK(wrch); 784 pcm_chnref(wrch, wdref); 785 chn_flush(wrch); /* may sleep */ 786 wrch->flags &= ~(CHN_F_RUNNING | CHN_F_MMAP | 787 CHN_F_DEAD | CHN_F_EXCLUSIVE); 788 chn_reset(wrch, 0, 0); 789 pcm_chnrelease(wrch); 790 } 791 PCM_LOCK(d); 792 } 793 794 dsp_cdevinfo_free(i_dev); 795 /* 796 * Release clone busy state and unref it so the automatic 797 * garbage collector will get the hint and do the remaining 798 * cleanup process. 799 */ 800 (void)snd_clone_release(i_dev); 801 802 /* 803 * destroy_dev() might sleep, so release pcm lock 804 * here and rely on pcm cv serialization. 805 */ 806 PCM_UNLOCK(d); 807 (void)snd_clone_unref(i_dev); 808 PCM_LOCK(d); 809 810 PCM_RELEASE(d); 811 PCM_UNLOCK(d); 812 813 PCM_GIANT_LEAVE(d); 814 815 return (0); 816 } 817 818 static __inline int 819 dsp_io_ops(struct cdev *i_dev, struct uio *buf) 820 { 821 struct snddev_info *d; 822 struct pcm_channel **ch, *rdch, *wrch; 823 int (*chn_io)(struct pcm_channel *, struct uio *); 824 int prio, ret; 825 pid_t runpid; 826 827 KASSERT(i_dev != NULL && buf != NULL && 828 (buf->uio_rw == UIO_READ || buf->uio_rw == UIO_WRITE), 829 ("%s(): io train wreck!", __func__)); 830 831 d = dsp_get_info(i_dev); 832 if (PCM_DETACHING(d) || !DSP_REGISTERED(d, i_dev)) 833 return (EBADF); 834 835 PCM_GIANT_ENTER(d); 836 837 switch (buf->uio_rw) { 838 case UIO_READ: 839 prio = SD_F_PRIO_RD; 840 ch = &rdch; 841 chn_io = chn_read; 842 break; 843 case UIO_WRITE: 844 prio = SD_F_PRIO_WR; 845 ch = &wrch; 846 chn_io = chn_write; 847 break; 848 default: 849 panic("invalid/corrupted uio direction: %d", buf->uio_rw); 850 break; 851 } 852 853 rdch = NULL; 854 wrch = NULL; 855 runpid = buf->uio_td->td_proc->p_pid; 856 857 getchns(i_dev, &rdch, &wrch, prio); 858 859 if (*ch == NULL || !((*ch)->flags & CHN_F_BUSY)) { 860 if (rdch != NULL || wrch != NULL) 861 relchns(i_dev, rdch, wrch, prio); 862 PCM_GIANT_EXIT(d); 863 return (EBADF); 864 } 865 866 if (((*ch)->flags & (CHN_F_MMAP | CHN_F_DEAD)) || 867 (((*ch)->flags & CHN_F_RUNNING) && (*ch)->pid != runpid)) { 868 relchns(i_dev, rdch, wrch, prio); 869 PCM_GIANT_EXIT(d); 870 return (EINVAL); 871 } else if (!((*ch)->flags & CHN_F_RUNNING)) { 872 (*ch)->flags |= CHN_F_RUNNING; 873 (*ch)->pid = runpid; 874 } 875 876 /* 877 * chn_read/write must give up channel lock in order to copy bytes 878 * from/to userland, so up the "in progress" counter to make sure 879 * someone else doesn't come along and muss up the buffer. 880 */ 881 ++(*ch)->inprog; 882 ret = chn_io(*ch, buf); 883 --(*ch)->inprog; 884 885 CHN_BROADCAST(&(*ch)->cv); 886 887 relchns(i_dev, rdch, wrch, prio); 888 889 PCM_GIANT_LEAVE(d); 890 891 return (ret); 892 } 893 894 static int 895 dsp_read(struct cdev *i_dev, struct uio *buf, int flag) 896 { 897 return (dsp_io_ops(i_dev, buf)); 898 } 899 900 static int 901 dsp_write(struct cdev *i_dev, struct uio *buf, int flag) 902 { 903 return (dsp_io_ops(i_dev, buf)); 904 } 905 906 static int 907 dsp_get_volume_channel(struct cdev *dev, struct pcm_channel **volch) 908 { 909 struct snddev_info *d; 910 struct pcm_channel *c; 911 int unit; 912 913 KASSERT(dev != NULL && volch != NULL, 914 ("%s(): NULL query dev=%p volch=%p", __func__, dev, volch)); 915 916 d = dsp_get_info(dev); 917 if (!PCM_REGISTERED(d)) { 918 *volch = NULL; 919 return (EINVAL); 920 } 921 922 PCM_UNLOCKASSERT(d); 923 924 *volch = NULL; 925 926 c = PCM_VOLCH(dev); 927 if (c != NULL) { 928 if (!(c->feederflags & (1 << FEEDER_VOLUME))) 929 return (-1); 930 *volch = c; 931 return (0); 932 } 933 934 PCM_LOCK(d); 935 PCM_WAIT(d); 936 PCM_ACQUIRE(d); 937 938 unit = dev2unit(dev); 939 940 CHN_FOREACH(c, d, channels.pcm) { 941 CHN_LOCK(c); 942 if (c->unit != unit) { 943 CHN_UNLOCK(c); 944 continue; 945 } 946 *volch = c; 947 pcm_chnref(c, 1); 948 PCM_VOLCH(dev) = c; 949 CHN_UNLOCK(c); 950 PCM_RELEASE(d); 951 PCM_UNLOCK(d); 952 return ((c->feederflags & (1 << FEEDER_VOLUME)) ? 0 : -1); 953 } 954 955 PCM_RELEASE(d); 956 PCM_UNLOCK(d); 957 958 return (EINVAL); 959 } 960 961 static int 962 dsp_ioctl_channel(struct cdev *dev, struct pcm_channel *volch, u_long cmd, 963 caddr_t arg) 964 { 965 struct snddev_info *d; 966 struct pcm_channel *rdch, *wrch; 967 int j, devtype, ret; 968 int left, right, center, mute; 969 970 d = dsp_get_info(dev); 971 if (!PCM_REGISTERED(d) || !(dsp_get_flags(dev) & SD_F_VPC)) 972 return (-1); 973 974 PCM_UNLOCKASSERT(d); 975 976 j = cmd & 0xff; 977 978 rdch = PCM_RDCH(dev); 979 wrch = PCM_WRCH(dev); 980 981 /* No specific channel, look into cache */ 982 if (volch == NULL) 983 volch = PCM_VOLCH(dev); 984 985 /* Look harder */ 986 if (volch == NULL) { 987 if (j == SOUND_MIXER_RECLEV && rdch != NULL) 988 volch = rdch; 989 else if (j == SOUND_MIXER_PCM && wrch != NULL) 990 volch = wrch; 991 } 992 993 devtype = PCMDEV(dev); 994 995 /* Look super harder */ 996 if (volch == NULL && 997 (devtype == SND_DEV_DSPHW_PLAY || devtype == SND_DEV_DSPHW_VPLAY || 998 devtype == SND_DEV_DSPHW_REC || devtype == SND_DEV_DSPHW_VREC)) { 999 ret = dsp_get_volume_channel(dev, &volch); 1000 if (ret != 0) 1001 return (ret); 1002 if (volch == NULL) 1003 return (EINVAL); 1004 } 1005 1006 /* Final validation */ 1007 if (volch == NULL) 1008 return (EINVAL); 1009 1010 CHN_LOCK(volch); 1011 if (!(volch->feederflags & (1 << FEEDER_VOLUME))) { 1012 CHN_UNLOCK(volch); 1013 return (EINVAL); 1014 } 1015 1016 switch (cmd & ~0xff) { 1017 case MIXER_WRITE(0): 1018 switch (j) { 1019 case SOUND_MIXER_MUTE: 1020 if (volch->direction == PCMDIR_REC) { 1021 chn_setmute_multi(volch, SND_VOL_C_PCM, (*(int *)arg & SOUND_MASK_RECLEV) != 0); 1022 } else { 1023 chn_setmute_multi(volch, SND_VOL_C_PCM, (*(int *)arg & SOUND_MASK_PCM) != 0); 1024 } 1025 break; 1026 case SOUND_MIXER_PCM: 1027 if (volch->direction != PCMDIR_PLAY) 1028 break; 1029 left = *(int *)arg & 0x7f; 1030 right = ((*(int *)arg) >> 8) & 0x7f; 1031 center = (left + right) >> 1; 1032 chn_setvolume_multi(volch, SND_VOL_C_PCM, 1033 left, right, center); 1034 break; 1035 case SOUND_MIXER_RECLEV: 1036 if (volch->direction != PCMDIR_REC) 1037 break; 1038 left = *(int *)arg & 0x7f; 1039 right = ((*(int *)arg) >> 8) & 0x7f; 1040 center = (left + right) >> 1; 1041 chn_setvolume_multi(volch, SND_VOL_C_PCM, 1042 left, right, center); 1043 break; 1044 default: 1045 /* ignore all other mixer writes */ 1046 break; 1047 } 1048 break; 1049 1050 case MIXER_READ(0): 1051 switch (j) { 1052 case SOUND_MIXER_MUTE: 1053 mute = CHN_GETMUTE(volch, SND_VOL_C_PCM, SND_CHN_T_FL) || 1054 CHN_GETMUTE(volch, SND_VOL_C_PCM, SND_CHN_T_FR); 1055 if (volch->direction == PCMDIR_REC) { 1056 *(int *)arg = mute << SOUND_MIXER_RECLEV; 1057 } else { 1058 *(int *)arg = mute << SOUND_MIXER_PCM; 1059 } 1060 break; 1061 case SOUND_MIXER_PCM: 1062 if (volch->direction != PCMDIR_PLAY) 1063 break; 1064 *(int *)arg = CHN_GETVOLUME(volch, 1065 SND_VOL_C_PCM, SND_CHN_T_FL); 1066 *(int *)arg |= CHN_GETVOLUME(volch, 1067 SND_VOL_C_PCM, SND_CHN_T_FR) << 8; 1068 break; 1069 case SOUND_MIXER_RECLEV: 1070 if (volch->direction != PCMDIR_REC) 1071 break; 1072 *(int *)arg = CHN_GETVOLUME(volch, 1073 SND_VOL_C_PCM, SND_CHN_T_FL); 1074 *(int *)arg |= CHN_GETVOLUME(volch, 1075 SND_VOL_C_PCM, SND_CHN_T_FR) << 8; 1076 break; 1077 case SOUND_MIXER_DEVMASK: 1078 case SOUND_MIXER_CAPS: 1079 case SOUND_MIXER_STEREODEVS: 1080 if (volch->direction == PCMDIR_REC) 1081 *(int *)arg = SOUND_MASK_RECLEV; 1082 else 1083 *(int *)arg = SOUND_MASK_PCM; 1084 break; 1085 default: 1086 *(int *)arg = 0; 1087 break; 1088 } 1089 break; 1090 1091 default: 1092 break; 1093 } 1094 CHN_UNLOCK(volch); 1095 return (0); 1096 } 1097 1098 static int 1099 dsp_ioctl(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode, 1100 struct thread *td) 1101 { 1102 struct pcm_channel *chn, *rdch, *wrch; 1103 struct snddev_info *d; 1104 u_long xcmd; 1105 int *arg_i, ret, tmp; 1106 1107 d = dsp_get_info(i_dev); 1108 if (PCM_DETACHING(d) || !DSP_REGISTERED(d, i_dev)) 1109 return (EBADF); 1110 1111 PCM_GIANT_ENTER(d); 1112 1113 arg_i = (int *)arg; 1114 ret = 0; 1115 xcmd = 0; 1116 chn = NULL; 1117 1118 if (IOCGROUP(cmd) == 'M') { 1119 if (cmd == OSS_GETVERSION) { 1120 *arg_i = SOUND_VERSION; 1121 PCM_GIANT_EXIT(d); 1122 return (0); 1123 } 1124 ret = dsp_ioctl_channel(i_dev, PCM_VOLCH(i_dev), cmd, arg); 1125 if (ret != -1) { 1126 PCM_GIANT_EXIT(d); 1127 return (ret); 1128 } 1129 1130 if (d->mixer_dev != NULL) { 1131 PCM_ACQUIRE_QUICK(d); 1132 ret = mixer_ioctl_cmd(d->mixer_dev, cmd, arg, -1, td, 1133 MIXER_CMD_DIRECT); 1134 PCM_RELEASE_QUICK(d); 1135 } else 1136 ret = EBADF; 1137 1138 PCM_GIANT_EXIT(d); 1139 1140 return (ret); 1141 } 1142 1143 /* 1144 * Certain ioctls may be made on any type of device (audio, mixer, 1145 * and MIDI). Handle those special cases here. 1146 */ 1147 if (IOCGROUP(cmd) == 'X') { 1148 PCM_ACQUIRE_QUICK(d); 1149 switch(cmd) { 1150 case SNDCTL_SYSINFO: 1151 sound_oss_sysinfo((oss_sysinfo *)arg); 1152 break; 1153 case SNDCTL_CARDINFO: 1154 ret = sound_oss_card_info((oss_card_info *)arg); 1155 break; 1156 case SNDCTL_AUDIOINFO: 1157 case SNDCTL_AUDIOINFO_EX: 1158 case SNDCTL_ENGINEINFO: 1159 ret = dsp_oss_audioinfo(i_dev, (oss_audioinfo *)arg); 1160 break; 1161 case SNDCTL_MIXERINFO: 1162 ret = mixer_oss_mixerinfo(i_dev, (oss_mixerinfo *)arg); 1163 break; 1164 default: 1165 ret = EINVAL; 1166 } 1167 PCM_RELEASE_QUICK(d); 1168 PCM_GIANT_EXIT(d); 1169 return (ret); 1170 } 1171 1172 getchns(i_dev, &rdch, &wrch, 0); 1173 1174 if (wrch != NULL && (wrch->flags & CHN_F_DEAD)) 1175 wrch = NULL; 1176 if (rdch != NULL && (rdch->flags & CHN_F_DEAD)) 1177 rdch = NULL; 1178 1179 if (wrch == NULL && rdch == NULL) { 1180 PCM_GIANT_EXIT(d); 1181 return (EINVAL); 1182 } 1183 1184 switch(cmd) { 1185 #ifdef OLDPCM_IOCTL 1186 /* 1187 * we start with the new ioctl interface. 1188 */ 1189 case AIONWRITE: /* how many bytes can write ? */ 1190 if (wrch) { 1191 CHN_LOCK(wrch); 1192 /* 1193 if (wrch && wrch->bufhard.dl) 1194 while (chn_wrfeed(wrch) == 0); 1195 */ 1196 *arg_i = sndbuf_getfree(wrch->bufsoft); 1197 CHN_UNLOCK(wrch); 1198 } else { 1199 *arg_i = 0; 1200 ret = EINVAL; 1201 } 1202 break; 1203 1204 case AIOSSIZE: /* set the current blocksize */ 1205 { 1206 struct snd_size *p = (struct snd_size *)arg; 1207 1208 p->play_size = 0; 1209 p->rec_size = 0; 1210 PCM_ACQUIRE_QUICK(d); 1211 if (wrch) { 1212 CHN_LOCK(wrch); 1213 chn_setblocksize(wrch, 2, p->play_size); 1214 p->play_size = sndbuf_getblksz(wrch->bufsoft); 1215 CHN_UNLOCK(wrch); 1216 } 1217 if (rdch) { 1218 CHN_LOCK(rdch); 1219 chn_setblocksize(rdch, 2, p->rec_size); 1220 p->rec_size = sndbuf_getblksz(rdch->bufsoft); 1221 CHN_UNLOCK(rdch); 1222 } 1223 PCM_RELEASE_QUICK(d); 1224 } 1225 break; 1226 case AIOGSIZE: /* get the current blocksize */ 1227 { 1228 struct snd_size *p = (struct snd_size *)arg; 1229 1230 if (wrch) { 1231 CHN_LOCK(wrch); 1232 p->play_size = sndbuf_getblksz(wrch->bufsoft); 1233 CHN_UNLOCK(wrch); 1234 } 1235 if (rdch) { 1236 CHN_LOCK(rdch); 1237 p->rec_size = sndbuf_getblksz(rdch->bufsoft); 1238 CHN_UNLOCK(rdch); 1239 } 1240 } 1241 break; 1242 1243 case AIOSFMT: 1244 case AIOGFMT: 1245 { 1246 snd_chan_param *p = (snd_chan_param *)arg; 1247 1248 if (cmd == AIOSFMT && 1249 ((p->play_format != 0 && p->play_rate == 0) || 1250 (p->rec_format != 0 && p->rec_rate == 0))) { 1251 ret = EINVAL; 1252 break; 1253 } 1254 PCM_ACQUIRE_QUICK(d); 1255 if (wrch) { 1256 CHN_LOCK(wrch); 1257 if (cmd == AIOSFMT && p->play_format != 0) { 1258 chn_setformat(wrch, 1259 SND_FORMAT(p->play_format, 1260 AFMT_CHANNEL(wrch->format), 1261 AFMT_EXTCHANNEL(wrch->format))); 1262 chn_setspeed(wrch, p->play_rate); 1263 } 1264 p->play_rate = wrch->speed; 1265 p->play_format = AFMT_ENCODING(wrch->format); 1266 CHN_UNLOCK(wrch); 1267 } else { 1268 p->play_rate = 0; 1269 p->play_format = 0; 1270 } 1271 if (rdch) { 1272 CHN_LOCK(rdch); 1273 if (cmd == AIOSFMT && p->rec_format != 0) { 1274 chn_setformat(rdch, 1275 SND_FORMAT(p->rec_format, 1276 AFMT_CHANNEL(rdch->format), 1277 AFMT_EXTCHANNEL(rdch->format))); 1278 chn_setspeed(rdch, p->rec_rate); 1279 } 1280 p->rec_rate = rdch->speed; 1281 p->rec_format = AFMT_ENCODING(rdch->format); 1282 CHN_UNLOCK(rdch); 1283 } else { 1284 p->rec_rate = 0; 1285 p->rec_format = 0; 1286 } 1287 PCM_RELEASE_QUICK(d); 1288 } 1289 break; 1290 1291 case AIOGCAP: /* get capabilities */ 1292 { 1293 snd_capabilities *p = (snd_capabilities *)arg; 1294 struct pcmchan_caps *pcaps = NULL, *rcaps = NULL; 1295 struct cdev *pdev; 1296 1297 PCM_LOCK(d); 1298 if (rdch) { 1299 CHN_LOCK(rdch); 1300 rcaps = chn_getcaps(rdch); 1301 } 1302 if (wrch) { 1303 CHN_LOCK(wrch); 1304 pcaps = chn_getcaps(wrch); 1305 } 1306 p->rate_min = max(rcaps? rcaps->minspeed : 0, 1307 pcaps? pcaps->minspeed : 0); 1308 p->rate_max = min(rcaps? rcaps->maxspeed : 1000000, 1309 pcaps? pcaps->maxspeed : 1000000); 1310 p->bufsize = min(rdch? sndbuf_getsize(rdch->bufsoft) : 1000000, 1311 wrch? sndbuf_getsize(wrch->bufsoft) : 1000000); 1312 /* XXX bad on sb16 */ 1313 p->formats = (rdch? chn_getformats(rdch) : 0xffffffff) & 1314 (wrch? chn_getformats(wrch) : 0xffffffff); 1315 if (rdch && wrch) 1316 p->formats |= (dsp_get_flags(i_dev) & SD_F_SIMPLEX)? 0 : AFMT_FULLDUPLEX; 1317 pdev = d->mixer_dev; 1318 p->mixers = 1; /* default: one mixer */ 1319 p->inputs = pdev->si_drv1? mix_getdevs(pdev->si_drv1) : 0; 1320 p->left = p->right = 100; 1321 if (wrch) 1322 CHN_UNLOCK(wrch); 1323 if (rdch) 1324 CHN_UNLOCK(rdch); 1325 PCM_UNLOCK(d); 1326 } 1327 break; 1328 1329 case AIOSTOP: 1330 if (*arg_i == AIOSYNC_PLAY && wrch) { 1331 CHN_LOCK(wrch); 1332 *arg_i = chn_abort(wrch); 1333 CHN_UNLOCK(wrch); 1334 } else if (*arg_i == AIOSYNC_CAPTURE && rdch) { 1335 CHN_LOCK(rdch); 1336 *arg_i = chn_abort(rdch); 1337 CHN_UNLOCK(rdch); 1338 } else { 1339 printf("AIOSTOP: bad channel 0x%x\n", *arg_i); 1340 *arg_i = 0; 1341 } 1342 break; 1343 1344 case AIOSYNC: 1345 printf("AIOSYNC chan 0x%03lx pos %lu unimplemented\n", 1346 ((snd_sync_parm *)arg)->chan, ((snd_sync_parm *)arg)->pos); 1347 break; 1348 #endif 1349 /* 1350 * here follow the standard ioctls (filio.h etc.) 1351 */ 1352 case FIONREAD: /* get # bytes to read */ 1353 if (rdch) { 1354 CHN_LOCK(rdch); 1355 /* if (rdch && rdch->bufhard.dl) 1356 while (chn_rdfeed(rdch) == 0); 1357 */ 1358 *arg_i = sndbuf_getready(rdch->bufsoft); 1359 CHN_UNLOCK(rdch); 1360 } else { 1361 *arg_i = 0; 1362 ret = EINVAL; 1363 } 1364 break; 1365 1366 case FIOASYNC: /*set/clear async i/o */ 1367 DEB( printf("FIOASYNC\n") ; ) 1368 break; 1369 1370 case SNDCTL_DSP_NONBLOCK: /* set non-blocking i/o */ 1371 case FIONBIO: /* set/clear non-blocking i/o */ 1372 if (rdch) { 1373 CHN_LOCK(rdch); 1374 if (cmd == SNDCTL_DSP_NONBLOCK || *arg_i) 1375 rdch->flags |= CHN_F_NBIO; 1376 else 1377 rdch->flags &= ~CHN_F_NBIO; 1378 CHN_UNLOCK(rdch); 1379 } 1380 if (wrch) { 1381 CHN_LOCK(wrch); 1382 if (cmd == SNDCTL_DSP_NONBLOCK || *arg_i) 1383 wrch->flags |= CHN_F_NBIO; 1384 else 1385 wrch->flags &= ~CHN_F_NBIO; 1386 CHN_UNLOCK(wrch); 1387 } 1388 break; 1389 1390 /* 1391 * Finally, here is the linux-compatible ioctl interface 1392 */ 1393 #define THE_REAL_SNDCTL_DSP_GETBLKSIZE _IOWR('P', 4, int) 1394 case THE_REAL_SNDCTL_DSP_GETBLKSIZE: 1395 case SNDCTL_DSP_GETBLKSIZE: 1396 chn = wrch ? wrch : rdch; 1397 if (chn) { 1398 CHN_LOCK(chn); 1399 *arg_i = sndbuf_getblksz(chn->bufsoft); 1400 CHN_UNLOCK(chn); 1401 } else { 1402 *arg_i = 0; 1403 ret = EINVAL; 1404 } 1405 break; 1406 1407 case SNDCTL_DSP_SETBLKSIZE: 1408 RANGE(*arg_i, 16, 65536); 1409 PCM_ACQUIRE_QUICK(d); 1410 if (wrch) { 1411 CHN_LOCK(wrch); 1412 chn_setblocksize(wrch, 2, *arg_i); 1413 CHN_UNLOCK(wrch); 1414 } 1415 if (rdch) { 1416 CHN_LOCK(rdch); 1417 chn_setblocksize(rdch, 2, *arg_i); 1418 CHN_UNLOCK(rdch); 1419 } 1420 PCM_RELEASE_QUICK(d); 1421 break; 1422 1423 case SNDCTL_DSP_RESET: 1424 DEB(printf("dsp reset\n")); 1425 if (wrch) { 1426 CHN_LOCK(wrch); 1427 chn_abort(wrch); 1428 chn_resetbuf(wrch); 1429 CHN_UNLOCK(wrch); 1430 } 1431 if (rdch) { 1432 CHN_LOCK(rdch); 1433 chn_abort(rdch); 1434 chn_resetbuf(rdch); 1435 CHN_UNLOCK(rdch); 1436 } 1437 break; 1438 1439 case SNDCTL_DSP_SYNC: 1440 DEB(printf("dsp sync\n")); 1441 /* chn_sync may sleep */ 1442 if (wrch) { 1443 CHN_LOCK(wrch); 1444 chn_sync(wrch, 0); 1445 CHN_UNLOCK(wrch); 1446 } 1447 break; 1448 1449 case SNDCTL_DSP_SPEED: 1450 /* chn_setspeed may sleep */ 1451 tmp = 0; 1452 PCM_ACQUIRE_QUICK(d); 1453 if (wrch) { 1454 CHN_LOCK(wrch); 1455 ret = chn_setspeed(wrch, *arg_i); 1456 tmp = wrch->speed; 1457 CHN_UNLOCK(wrch); 1458 } 1459 if (rdch && ret == 0) { 1460 CHN_LOCK(rdch); 1461 ret = chn_setspeed(rdch, *arg_i); 1462 if (tmp == 0) 1463 tmp = rdch->speed; 1464 CHN_UNLOCK(rdch); 1465 } 1466 PCM_RELEASE_QUICK(d); 1467 *arg_i = tmp; 1468 break; 1469 1470 case SOUND_PCM_READ_RATE: 1471 chn = wrch ? wrch : rdch; 1472 if (chn) { 1473 CHN_LOCK(chn); 1474 *arg_i = chn->speed; 1475 CHN_UNLOCK(chn); 1476 } else { 1477 *arg_i = 0; 1478 ret = EINVAL; 1479 } 1480 break; 1481 1482 case SNDCTL_DSP_STEREO: 1483 tmp = -1; 1484 *arg_i = (*arg_i)? 2 : 1; 1485 PCM_ACQUIRE_QUICK(d); 1486 if (wrch) { 1487 CHN_LOCK(wrch); 1488 ret = chn_setformat(wrch, 1489 SND_FORMAT(wrch->format, *arg_i, 0)); 1490 tmp = (AFMT_CHANNEL(wrch->format) > 1)? 1 : 0; 1491 CHN_UNLOCK(wrch); 1492 } 1493 if (rdch && ret == 0) { 1494 CHN_LOCK(rdch); 1495 ret = chn_setformat(rdch, 1496 SND_FORMAT(rdch->format, *arg_i, 0)); 1497 if (tmp == -1) 1498 tmp = (AFMT_CHANNEL(rdch->format) > 1)? 1 : 0; 1499 CHN_UNLOCK(rdch); 1500 } 1501 PCM_RELEASE_QUICK(d); 1502 *arg_i = tmp; 1503 break; 1504 1505 case SOUND_PCM_WRITE_CHANNELS: 1506 /* case SNDCTL_DSP_CHANNELS: ( == SOUND_PCM_WRITE_CHANNELS) */ 1507 if (*arg_i < 0) { 1508 *arg_i = 0; 1509 ret = EINVAL; 1510 break; 1511 } 1512 if (*arg_i != 0) { 1513 struct pcmchan_matrix *m; 1514 uint32_t ext; 1515 1516 tmp = 0; 1517 if (*arg_i > SND_CHN_MAX) 1518 *arg_i = SND_CHN_MAX; 1519 1520 m = feeder_matrix_default_channel_map(*arg_i); 1521 if (m != NULL) 1522 ext = m->ext; 1523 else 1524 ext = 0; 1525 1526 PCM_ACQUIRE_QUICK(d); 1527 if (wrch) { 1528 CHN_LOCK(wrch); 1529 ret = chn_setformat(wrch, 1530 SND_FORMAT(wrch->format, *arg_i, ext)); 1531 tmp = AFMT_CHANNEL(wrch->format); 1532 CHN_UNLOCK(wrch); 1533 } 1534 if (rdch && ret == 0) { 1535 CHN_LOCK(rdch); 1536 ret = chn_setformat(rdch, 1537 SND_FORMAT(rdch->format, *arg_i, ext)); 1538 if (tmp == 0) 1539 tmp = AFMT_CHANNEL(rdch->format); 1540 CHN_UNLOCK(rdch); 1541 } 1542 PCM_RELEASE_QUICK(d); 1543 *arg_i = tmp; 1544 } else { 1545 chn = wrch ? wrch : rdch; 1546 CHN_LOCK(chn); 1547 *arg_i = AFMT_CHANNEL(chn->format); 1548 CHN_UNLOCK(chn); 1549 } 1550 break; 1551 1552 case SOUND_PCM_READ_CHANNELS: 1553 chn = wrch ? wrch : rdch; 1554 if (chn) { 1555 CHN_LOCK(chn); 1556 *arg_i = AFMT_CHANNEL(chn->format); 1557 CHN_UNLOCK(chn); 1558 } else { 1559 *arg_i = 0; 1560 ret = EINVAL; 1561 } 1562 break; 1563 1564 case SNDCTL_DSP_GETFMTS: /* returns a mask of supported fmts */ 1565 chn = wrch ? wrch : rdch; 1566 if (chn) { 1567 CHN_LOCK(chn); 1568 *arg_i = chn_getformats(chn); 1569 CHN_UNLOCK(chn); 1570 } else { 1571 *arg_i = 0; 1572 ret = EINVAL; 1573 } 1574 break; 1575 1576 case SNDCTL_DSP_SETFMT: /* sets _one_ format */ 1577 if (*arg_i != AFMT_QUERY) { 1578 tmp = 0; 1579 PCM_ACQUIRE_QUICK(d); 1580 if (wrch) { 1581 CHN_LOCK(wrch); 1582 ret = chn_setformat(wrch, SND_FORMAT(*arg_i, 1583 AFMT_CHANNEL(wrch->format), 1584 AFMT_EXTCHANNEL(wrch->format))); 1585 tmp = wrch->format; 1586 CHN_UNLOCK(wrch); 1587 } 1588 if (rdch && ret == 0) { 1589 CHN_LOCK(rdch); 1590 ret = chn_setformat(rdch, SND_FORMAT(*arg_i, 1591 AFMT_CHANNEL(rdch->format), 1592 AFMT_EXTCHANNEL(rdch->format))); 1593 if (tmp == 0) 1594 tmp = rdch->format; 1595 CHN_UNLOCK(rdch); 1596 } 1597 PCM_RELEASE_QUICK(d); 1598 *arg_i = AFMT_ENCODING(tmp); 1599 } else { 1600 chn = wrch ? wrch : rdch; 1601 CHN_LOCK(chn); 1602 *arg_i = AFMT_ENCODING(chn->format); 1603 CHN_UNLOCK(chn); 1604 } 1605 break; 1606 1607 case SNDCTL_DSP_SETFRAGMENT: 1608 DEB(printf("SNDCTL_DSP_SETFRAGMENT 0x%08x\n", *(int *)arg)); 1609 { 1610 uint32_t fragln = (*arg_i) & 0x0000ffff; 1611 uint32_t maxfrags = ((*arg_i) & 0xffff0000) >> 16; 1612 uint32_t fragsz; 1613 uint32_t r_maxfrags, r_fragsz; 1614 1615 RANGE(fragln, 4, 16); 1616 fragsz = 1 << fragln; 1617 1618 if (maxfrags == 0) 1619 maxfrags = CHN_2NDBUFMAXSIZE / fragsz; 1620 if (maxfrags < 2) 1621 maxfrags = 2; 1622 if (maxfrags * fragsz > CHN_2NDBUFMAXSIZE) 1623 maxfrags = CHN_2NDBUFMAXSIZE / fragsz; 1624 1625 DEB(printf("SNDCTL_DSP_SETFRAGMENT %d frags, %d sz\n", maxfrags, fragsz)); 1626 PCM_ACQUIRE_QUICK(d); 1627 if (rdch) { 1628 CHN_LOCK(rdch); 1629 ret = chn_setblocksize(rdch, maxfrags, fragsz); 1630 r_maxfrags = sndbuf_getblkcnt(rdch->bufsoft); 1631 r_fragsz = sndbuf_getblksz(rdch->bufsoft); 1632 CHN_UNLOCK(rdch); 1633 } else { 1634 r_maxfrags = maxfrags; 1635 r_fragsz = fragsz; 1636 } 1637 if (wrch && ret == 0) { 1638 CHN_LOCK(wrch); 1639 ret = chn_setblocksize(wrch, maxfrags, fragsz); 1640 maxfrags = sndbuf_getblkcnt(wrch->bufsoft); 1641 fragsz = sndbuf_getblksz(wrch->bufsoft); 1642 CHN_UNLOCK(wrch); 1643 } else { /* use whatever came from the read channel */ 1644 maxfrags = r_maxfrags; 1645 fragsz = r_fragsz; 1646 } 1647 PCM_RELEASE_QUICK(d); 1648 1649 fragln = 0; 1650 while (fragsz > 1) { 1651 fragln++; 1652 fragsz >>= 1; 1653 } 1654 *arg_i = (maxfrags << 16) | fragln; 1655 } 1656 break; 1657 1658 case SNDCTL_DSP_GETISPACE: 1659 /* return the size of data available in the input queue */ 1660 { 1661 audio_buf_info *a = (audio_buf_info *)arg; 1662 if (rdch) { 1663 struct snd_dbuf *bs = rdch->bufsoft; 1664 1665 CHN_LOCK(rdch); 1666 a->bytes = sndbuf_getready(bs); 1667 a->fragments = a->bytes / sndbuf_getblksz(bs); 1668 a->fragstotal = sndbuf_getblkcnt(bs); 1669 a->fragsize = sndbuf_getblksz(bs); 1670 CHN_UNLOCK(rdch); 1671 } else 1672 ret = EINVAL; 1673 } 1674 break; 1675 1676 case SNDCTL_DSP_GETOSPACE: 1677 /* return space available in the output queue */ 1678 { 1679 audio_buf_info *a = (audio_buf_info *)arg; 1680 if (wrch) { 1681 struct snd_dbuf *bs = wrch->bufsoft; 1682 1683 CHN_LOCK(wrch); 1684 /* XXX abusive DMA update: chn_wrupdate(wrch); */ 1685 a->bytes = sndbuf_getfree(bs); 1686 a->fragments = a->bytes / sndbuf_getblksz(bs); 1687 a->fragstotal = sndbuf_getblkcnt(bs); 1688 a->fragsize = sndbuf_getblksz(bs); 1689 CHN_UNLOCK(wrch); 1690 } else 1691 ret = EINVAL; 1692 } 1693 break; 1694 1695 case SNDCTL_DSP_GETIPTR: 1696 { 1697 count_info *a = (count_info *)arg; 1698 if (rdch) { 1699 struct snd_dbuf *bs = rdch->bufsoft; 1700 1701 CHN_LOCK(rdch); 1702 /* XXX abusive DMA update: chn_rdupdate(rdch); */ 1703 a->bytes = sndbuf_gettotal(bs); 1704 a->blocks = sndbuf_getblocks(bs) - rdch->blocks; 1705 a->ptr = sndbuf_getfreeptr(bs); 1706 rdch->blocks = sndbuf_getblocks(bs); 1707 CHN_UNLOCK(rdch); 1708 } else 1709 ret = EINVAL; 1710 } 1711 break; 1712 1713 case SNDCTL_DSP_GETOPTR: 1714 { 1715 count_info *a = (count_info *)arg; 1716 if (wrch) { 1717 struct snd_dbuf *bs = wrch->bufsoft; 1718 1719 CHN_LOCK(wrch); 1720 /* XXX abusive DMA update: chn_wrupdate(wrch); */ 1721 a->bytes = sndbuf_gettotal(bs); 1722 a->blocks = sndbuf_getblocks(bs) - wrch->blocks; 1723 a->ptr = sndbuf_getreadyptr(bs); 1724 wrch->blocks = sndbuf_getblocks(bs); 1725 CHN_UNLOCK(wrch); 1726 } else 1727 ret = EINVAL; 1728 } 1729 break; 1730 1731 case SNDCTL_DSP_GETCAPS: 1732 PCM_LOCK(d); 1733 *arg_i = PCM_CAP_REALTIME | PCM_CAP_MMAP | PCM_CAP_TRIGGER; 1734 if (rdch && wrch && !(dsp_get_flags(i_dev) & SD_F_SIMPLEX)) 1735 *arg_i |= PCM_CAP_DUPLEX; 1736 if (rdch && (rdch->flags & CHN_F_VIRTUAL) != 0) 1737 *arg_i |= PCM_CAP_VIRTUAL; 1738 if (wrch && (wrch->flags & CHN_F_VIRTUAL) != 0) 1739 *arg_i |= PCM_CAP_VIRTUAL; 1740 PCM_UNLOCK(d); 1741 break; 1742 1743 case SOUND_PCM_READ_BITS: 1744 chn = wrch ? wrch : rdch; 1745 if (chn) { 1746 CHN_LOCK(chn); 1747 if (chn->format & AFMT_8BIT) 1748 *arg_i = 8; 1749 else if (chn->format & AFMT_16BIT) 1750 *arg_i = 16; 1751 else if (chn->format & AFMT_24BIT) 1752 *arg_i = 24; 1753 else if (chn->format & AFMT_32BIT) 1754 *arg_i = 32; 1755 else 1756 ret = EINVAL; 1757 CHN_UNLOCK(chn); 1758 } else { 1759 *arg_i = 0; 1760 ret = EINVAL; 1761 } 1762 break; 1763 1764 case SNDCTL_DSP_SETTRIGGER: 1765 if (rdch) { 1766 CHN_LOCK(rdch); 1767 rdch->flags &= ~CHN_F_NOTRIGGER; 1768 if (*arg_i & PCM_ENABLE_INPUT) 1769 chn_start(rdch, 1); 1770 else { 1771 chn_abort(rdch); 1772 chn_resetbuf(rdch); 1773 rdch->flags |= CHN_F_NOTRIGGER; 1774 } 1775 CHN_UNLOCK(rdch); 1776 } 1777 if (wrch) { 1778 CHN_LOCK(wrch); 1779 wrch->flags &= ~CHN_F_NOTRIGGER; 1780 if (*arg_i & PCM_ENABLE_OUTPUT) 1781 chn_start(wrch, 1); 1782 else { 1783 chn_abort(wrch); 1784 chn_resetbuf(wrch); 1785 wrch->flags |= CHN_F_NOTRIGGER; 1786 } 1787 CHN_UNLOCK(wrch); 1788 } 1789 break; 1790 1791 case SNDCTL_DSP_GETTRIGGER: 1792 *arg_i = 0; 1793 if (wrch) { 1794 CHN_LOCK(wrch); 1795 if (wrch->flags & CHN_F_TRIGGERED) 1796 *arg_i |= PCM_ENABLE_OUTPUT; 1797 CHN_UNLOCK(wrch); 1798 } 1799 if (rdch) { 1800 CHN_LOCK(rdch); 1801 if (rdch->flags & CHN_F_TRIGGERED) 1802 *arg_i |= PCM_ENABLE_INPUT; 1803 CHN_UNLOCK(rdch); 1804 } 1805 break; 1806 1807 case SNDCTL_DSP_GETODELAY: 1808 if (wrch) { 1809 struct snd_dbuf *bs = wrch->bufsoft; 1810 1811 CHN_LOCK(wrch); 1812 /* XXX abusive DMA update: chn_wrupdate(wrch); */ 1813 *arg_i = sndbuf_getready(bs); 1814 CHN_UNLOCK(wrch); 1815 } else 1816 ret = EINVAL; 1817 break; 1818 1819 case SNDCTL_DSP_POST: 1820 if (wrch) { 1821 CHN_LOCK(wrch); 1822 wrch->flags &= ~CHN_F_NOTRIGGER; 1823 chn_start(wrch, 1); 1824 CHN_UNLOCK(wrch); 1825 } 1826 break; 1827 1828 case SNDCTL_DSP_SETDUPLEX: 1829 /* 1830 * switch to full-duplex mode if card is in half-duplex 1831 * mode and is able to work in full-duplex mode 1832 */ 1833 PCM_LOCK(d); 1834 if (rdch && wrch && (dsp_get_flags(i_dev) & SD_F_SIMPLEX)) 1835 dsp_set_flags(i_dev, dsp_get_flags(i_dev)^SD_F_SIMPLEX); 1836 PCM_UNLOCK(d); 1837 break; 1838 1839 /* 1840 * The following four ioctls are simple wrappers around mixer_ioctl 1841 * with no further processing. xcmd is short for "translated 1842 * command". 1843 */ 1844 case SNDCTL_DSP_GETRECVOL: 1845 if (xcmd == 0) { 1846 xcmd = SOUND_MIXER_READ_RECLEV; 1847 chn = rdch; 1848 } 1849 /* FALLTHROUGH */ 1850 case SNDCTL_DSP_SETRECVOL: 1851 if (xcmd == 0) { 1852 xcmd = SOUND_MIXER_WRITE_RECLEV; 1853 chn = rdch; 1854 } 1855 /* FALLTHROUGH */ 1856 case SNDCTL_DSP_GETPLAYVOL: 1857 if (xcmd == 0) { 1858 xcmd = SOUND_MIXER_READ_PCM; 1859 chn = wrch; 1860 } 1861 /* FALLTHROUGH */ 1862 case SNDCTL_DSP_SETPLAYVOL: 1863 if (xcmd == 0) { 1864 xcmd = SOUND_MIXER_WRITE_PCM; 1865 chn = wrch; 1866 } 1867 1868 ret = dsp_ioctl_channel(i_dev, chn, xcmd, arg); 1869 if (ret != -1) { 1870 PCM_GIANT_EXIT(d); 1871 return (ret); 1872 } 1873 1874 if (d->mixer_dev != NULL) { 1875 PCM_ACQUIRE_QUICK(d); 1876 ret = mixer_ioctl_cmd(d->mixer_dev, xcmd, arg, -1, td, 1877 MIXER_CMD_DIRECT); 1878 PCM_RELEASE_QUICK(d); 1879 } else 1880 ret = ENOTSUP; 1881 1882 break; 1883 1884 case SNDCTL_DSP_GET_RECSRC_NAMES: 1885 case SNDCTL_DSP_GET_RECSRC: 1886 case SNDCTL_DSP_SET_RECSRC: 1887 if (d->mixer_dev != NULL) { 1888 PCM_ACQUIRE_QUICK(d); 1889 ret = mixer_ioctl_cmd(d->mixer_dev, cmd, arg, -1, td, 1890 MIXER_CMD_DIRECT); 1891 PCM_RELEASE_QUICK(d); 1892 } else 1893 ret = ENOTSUP; 1894 break; 1895 1896 /* 1897 * The following 3 ioctls aren't very useful at the moment. For 1898 * now, only a single channel is associated with a cdev (/dev/dspN 1899 * instance), so there's only a single output routing to use (i.e., 1900 * the wrch bound to this cdev). 1901 */ 1902 case SNDCTL_DSP_GET_PLAYTGT_NAMES: 1903 { 1904 oss_mixer_enuminfo *ei; 1905 ei = (oss_mixer_enuminfo *)arg; 1906 ei->dev = 0; 1907 ei->ctrl = 0; 1908 ei->version = 0; /* static for now */ 1909 ei->strindex[0] = 0; 1910 1911 if (wrch != NULL) { 1912 ei->nvalues = 1; 1913 strlcpy(ei->strings, wrch->name, 1914 sizeof(ei->strings)); 1915 } else { 1916 ei->nvalues = 0; 1917 ei->strings[0] = '\0'; 1918 } 1919 } 1920 break; 1921 case SNDCTL_DSP_GET_PLAYTGT: 1922 case SNDCTL_DSP_SET_PLAYTGT: /* yes, they are the same for now */ 1923 /* 1924 * Re: SET_PLAYTGT 1925 * OSSv4: "The value that was accepted by the device will 1926 * be returned back in the variable pointed by the 1927 * argument." 1928 */ 1929 if (wrch != NULL) 1930 *arg_i = 0; 1931 else 1932 ret = EINVAL; 1933 break; 1934 1935 case SNDCTL_DSP_SILENCE: 1936 /* 1937 * Flush the software (pre-feed) buffer, but try to minimize playback 1938 * interruption. (I.e., record unplayed samples with intent to 1939 * restore by SNDCTL_DSP_SKIP.) Intended for application "pause" 1940 * functionality. 1941 */ 1942 if (wrch == NULL) 1943 ret = EINVAL; 1944 else { 1945 struct snd_dbuf *bs; 1946 CHN_LOCK(wrch); 1947 while (wrch->inprog != 0) 1948 cv_wait(&wrch->cv, wrch->lock); 1949 bs = wrch->bufsoft; 1950 if ((bs->shadbuf != NULL) && (sndbuf_getready(bs) > 0)) { 1951 bs->sl = sndbuf_getready(bs); 1952 sndbuf_dispose(bs, bs->shadbuf, sndbuf_getready(bs)); 1953 sndbuf_fillsilence(bs); 1954 chn_start(wrch, 0); 1955 } 1956 CHN_UNLOCK(wrch); 1957 } 1958 break; 1959 1960 case SNDCTL_DSP_SKIP: 1961 /* 1962 * OSSv4 docs: "This ioctl call discards all unplayed samples in the 1963 * playback buffer by moving the current write position immediately 1964 * before the point where the device is currently reading the samples." 1965 */ 1966 if (wrch == NULL) 1967 ret = EINVAL; 1968 else { 1969 struct snd_dbuf *bs; 1970 CHN_LOCK(wrch); 1971 while (wrch->inprog != 0) 1972 cv_wait(&wrch->cv, wrch->lock); 1973 bs = wrch->bufsoft; 1974 if ((bs->shadbuf != NULL) && (bs->sl > 0)) { 1975 sndbuf_softreset(bs); 1976 sndbuf_acquire(bs, bs->shadbuf, bs->sl); 1977 bs->sl = 0; 1978 chn_start(wrch, 0); 1979 } 1980 CHN_UNLOCK(wrch); 1981 } 1982 break; 1983 1984 case SNDCTL_DSP_CURRENT_OPTR: 1985 case SNDCTL_DSP_CURRENT_IPTR: 1986 /** 1987 * @note Changing formats resets the buffer counters, which differs 1988 * from the 4Front drivers. However, I don't expect this to be 1989 * much of a problem. 1990 * 1991 * @note In a test where @c CURRENT_OPTR is called immediately after write 1992 * returns, this driver is about 32K samples behind whereas 1993 * 4Front's is about 8K samples behind. Should determine source 1994 * of discrepancy, even if only out of curiosity. 1995 * 1996 * @todo Actually test SNDCTL_DSP_CURRENT_IPTR. 1997 */ 1998 chn = (cmd == SNDCTL_DSP_CURRENT_OPTR) ? wrch : rdch; 1999 if (chn == NULL) 2000 ret = EINVAL; 2001 else { 2002 struct snd_dbuf *bs; 2003 /* int tmp; */ 2004 2005 oss_count_t *oc = (oss_count_t *)arg; 2006 2007 CHN_LOCK(chn); 2008 bs = chn->bufsoft; 2009 #if 0 2010 tmp = (sndbuf_getsize(b) + chn_getptr(chn) - sndbuf_gethwptr(b)) % sndbuf_getsize(b); 2011 oc->samples = (sndbuf_gettotal(b) + tmp) / sndbuf_getalign(b); 2012 oc->fifo_samples = (sndbuf_getready(b) - tmp) / sndbuf_getalign(b); 2013 #else 2014 oc->samples = sndbuf_gettotal(bs) / sndbuf_getalign(bs); 2015 oc->fifo_samples = sndbuf_getready(bs) / sndbuf_getalign(bs); 2016 #endif 2017 CHN_UNLOCK(chn); 2018 } 2019 break; 2020 2021 case SNDCTL_DSP_HALT_OUTPUT: 2022 case SNDCTL_DSP_HALT_INPUT: 2023 chn = (cmd == SNDCTL_DSP_HALT_OUTPUT) ? wrch : rdch; 2024 if (chn == NULL) 2025 ret = EINVAL; 2026 else { 2027 CHN_LOCK(chn); 2028 chn_abort(chn); 2029 CHN_UNLOCK(chn); 2030 } 2031 break; 2032 2033 case SNDCTL_DSP_LOW_WATER: 2034 /* 2035 * Set the number of bytes required to attract attention by 2036 * select/poll. 2037 */ 2038 if (wrch != NULL) { 2039 CHN_LOCK(wrch); 2040 wrch->lw = (*arg_i > 1) ? *arg_i : 1; 2041 CHN_UNLOCK(wrch); 2042 } 2043 if (rdch != NULL) { 2044 CHN_LOCK(rdch); 2045 rdch->lw = (*arg_i > 1) ? *arg_i : 1; 2046 CHN_UNLOCK(rdch); 2047 } 2048 break; 2049 2050 case SNDCTL_DSP_GETERROR: 2051 /* 2052 * OSSv4 docs: "All errors and counters will automatically be 2053 * cleared to zeroes after the call so each call will return only 2054 * the errors that occurred after the previous invocation. ... The 2055 * play_underruns and rec_overrun fields are the only useful fields 2056 * returned by OSS 4.0." 2057 */ 2058 { 2059 audio_errinfo *ei = (audio_errinfo *)arg; 2060 2061 bzero((void *)ei, sizeof(*ei)); 2062 2063 if (wrch != NULL) { 2064 CHN_LOCK(wrch); 2065 ei->play_underruns = wrch->xruns; 2066 wrch->xruns = 0; 2067 CHN_UNLOCK(wrch); 2068 } 2069 if (rdch != NULL) { 2070 CHN_LOCK(rdch); 2071 ei->rec_overruns = rdch->xruns; 2072 rdch->xruns = 0; 2073 CHN_UNLOCK(rdch); 2074 } 2075 } 2076 break; 2077 2078 case SNDCTL_DSP_SYNCGROUP: 2079 PCM_ACQUIRE_QUICK(d); 2080 ret = dsp_oss_syncgroup(wrch, rdch, (oss_syncgroup *)arg); 2081 PCM_RELEASE_QUICK(d); 2082 break; 2083 2084 case SNDCTL_DSP_SYNCSTART: 2085 PCM_ACQUIRE_QUICK(d); 2086 ret = dsp_oss_syncstart(*arg_i); 2087 PCM_RELEASE_QUICK(d); 2088 break; 2089 2090 case SNDCTL_DSP_POLICY: 2091 PCM_ACQUIRE_QUICK(d); 2092 ret = dsp_oss_policy(wrch, rdch, *arg_i); 2093 PCM_RELEASE_QUICK(d); 2094 break; 2095 2096 case SNDCTL_DSP_COOKEDMODE: 2097 PCM_ACQUIRE_QUICK(d); 2098 if (!(dsp_get_flags(i_dev) & SD_F_BITPERFECT)) 2099 ret = dsp_oss_cookedmode(wrch, rdch, *arg_i); 2100 PCM_RELEASE_QUICK(d); 2101 break; 2102 case SNDCTL_DSP_GET_CHNORDER: 2103 PCM_ACQUIRE_QUICK(d); 2104 ret = dsp_oss_getchnorder(wrch, rdch, (unsigned long long *)arg); 2105 PCM_RELEASE_QUICK(d); 2106 break; 2107 case SNDCTL_DSP_SET_CHNORDER: 2108 PCM_ACQUIRE_QUICK(d); 2109 ret = dsp_oss_setchnorder(wrch, rdch, (unsigned long long *)arg); 2110 PCM_RELEASE_QUICK(d); 2111 break; 2112 case SNDCTL_DSP_GETCHANNELMASK: /* XXX vlc */ 2113 PCM_ACQUIRE_QUICK(d); 2114 ret = dsp_oss_getchannelmask(wrch, rdch, (int *)arg); 2115 PCM_RELEASE_QUICK(d); 2116 break; 2117 case SNDCTL_DSP_BIND_CHANNEL: /* XXX what?!? */ 2118 ret = EINVAL; 2119 break; 2120 #ifdef OSSV4_EXPERIMENT 2121 /* 2122 * XXX The following ioctls are not yet supported and just return 2123 * EINVAL. 2124 */ 2125 case SNDCTL_DSP_GETOPEAKS: 2126 case SNDCTL_DSP_GETIPEAKS: 2127 chn = (cmd == SNDCTL_DSP_GETOPEAKS) ? wrch : rdch; 2128 if (chn == NULL) 2129 ret = EINVAL; 2130 else { 2131 oss_peaks_t *op = (oss_peaks_t *)arg; 2132 int lpeak, rpeak; 2133 2134 CHN_LOCK(chn); 2135 ret = chn_getpeaks(chn, &lpeak, &rpeak); 2136 if (ret == -1) 2137 ret = EINVAL; 2138 else { 2139 (*op)[0] = lpeak; 2140 (*op)[1] = rpeak; 2141 } 2142 CHN_UNLOCK(chn); 2143 } 2144 break; 2145 2146 /* 2147 * XXX Once implemented, revisit this for proper cv protection 2148 * (if necessary). 2149 */ 2150 case SNDCTL_GETLABEL: 2151 ret = dsp_oss_getlabel(wrch, rdch, (oss_label_t *)arg); 2152 break; 2153 case SNDCTL_SETLABEL: 2154 ret = dsp_oss_setlabel(wrch, rdch, (oss_label_t *)arg); 2155 break; 2156 case SNDCTL_GETSONG: 2157 ret = dsp_oss_getsong(wrch, rdch, (oss_longname_t *)arg); 2158 break; 2159 case SNDCTL_SETSONG: 2160 ret = dsp_oss_setsong(wrch, rdch, (oss_longname_t *)arg); 2161 break; 2162 case SNDCTL_SETNAME: 2163 ret = dsp_oss_setname(wrch, rdch, (oss_longname_t *)arg); 2164 break; 2165 #if 0 2166 /** 2167 * @note The S/PDIF interface ioctls, @c SNDCTL_DSP_READCTL and 2168 * @c SNDCTL_DSP_WRITECTL have been omitted at the suggestion of 2169 * 4Front Technologies. 2170 */ 2171 case SNDCTL_DSP_READCTL: 2172 case SNDCTL_DSP_WRITECTL: 2173 ret = EINVAL; 2174 break; 2175 #endif /* !0 (explicitly omitted ioctls) */ 2176 2177 #endif /* !OSSV4_EXPERIMENT */ 2178 case SNDCTL_DSP_MAPINBUF: 2179 case SNDCTL_DSP_MAPOUTBUF: 2180 case SNDCTL_DSP_SETSYNCRO: 2181 /* undocumented */ 2182 2183 case SNDCTL_DSP_SUBDIVIDE: 2184 case SOUND_PCM_WRITE_FILTER: 2185 case SOUND_PCM_READ_FILTER: 2186 /* dunno what these do, don't sound important */ 2187 2188 default: 2189 DEB(printf("default ioctl fn 0x%08lx fail\n", cmd)); 2190 ret = EINVAL; 2191 break; 2192 } 2193 2194 PCM_GIANT_LEAVE(d); 2195 2196 return (ret); 2197 } 2198 2199 static int 2200 dsp_poll(struct cdev *i_dev, int events, struct thread *td) 2201 { 2202 struct snddev_info *d; 2203 struct pcm_channel *wrch, *rdch; 2204 int ret, e; 2205 2206 d = dsp_get_info(i_dev); 2207 if (PCM_DETACHING(d) || !DSP_REGISTERED(d, i_dev)) { 2208 /* XXX many clients don't understand POLLNVAL */ 2209 return (events & (POLLHUP | POLLPRI | POLLIN | 2210 POLLRDNORM | POLLOUT | POLLWRNORM)); 2211 } 2212 PCM_GIANT_ENTER(d); 2213 2214 wrch = NULL; 2215 rdch = NULL; 2216 ret = 0; 2217 2218 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 2219 2220 if (wrch != NULL && !(wrch->flags & CHN_F_DEAD)) { 2221 e = (events & (POLLOUT | POLLWRNORM)); 2222 if (e) 2223 ret |= chn_poll(wrch, e, td); 2224 } 2225 2226 if (rdch != NULL && !(rdch->flags & CHN_F_DEAD)) { 2227 e = (events & (POLLIN | POLLRDNORM)); 2228 if (e) 2229 ret |= chn_poll(rdch, e, td); 2230 } 2231 2232 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 2233 2234 PCM_GIANT_LEAVE(d); 2235 2236 return (ret); 2237 } 2238 2239 static int 2240 dsp_mmap(struct cdev *i_dev, vm_ooffset_t offset, vm_paddr_t *paddr, 2241 int nprot, vm_memattr_t *memattr) 2242 { 2243 2244 /* 2245 * offset is in range due to checks in dsp_mmap_single(). 2246 * XXX memattr is not honored. 2247 */ 2248 *paddr = vtophys(offset); 2249 return (0); 2250 } 2251 2252 static int 2253 dsp_mmap_single(struct cdev *i_dev, vm_ooffset_t *offset, 2254 vm_size_t size, struct vm_object **object, int nprot) 2255 { 2256 struct snddev_info *d; 2257 struct pcm_channel *wrch, *rdch, *c; 2258 2259 /* 2260 * Reject PROT_EXEC by default. It just doesn't makes sense. 2261 * Unfortunately, we have to give up this one due to linux_mmap 2262 * changes. 2263 * 2264 * https://lists.freebsd.org/pipermail/freebsd-emulation/2007-June/003698.html 2265 * 2266 */ 2267 #ifdef SV_ABI_LINUX 2268 if ((nprot & PROT_EXEC) && (dsp_mmap_allow_prot_exec < 0 || 2269 (dsp_mmap_allow_prot_exec == 0 && 2270 SV_CURPROC_ABI() != SV_ABI_LINUX))) 2271 #else 2272 if ((nprot & PROT_EXEC) && dsp_mmap_allow_prot_exec < 1) 2273 #endif 2274 return (EINVAL); 2275 2276 /* 2277 * PROT_READ (alone) selects the input buffer. 2278 * PROT_WRITE (alone) selects the output buffer. 2279 * PROT_WRITE|PROT_READ together select the output buffer. 2280 */ 2281 if ((nprot & (PROT_READ | PROT_WRITE)) == 0) 2282 return (EINVAL); 2283 2284 d = dsp_get_info(i_dev); 2285 if (PCM_DETACHING(d) || !DSP_REGISTERED(d, i_dev)) 2286 return (EINVAL); 2287 2288 PCM_GIANT_ENTER(d); 2289 2290 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 2291 2292 c = ((nprot & PROT_WRITE) != 0) ? wrch : rdch; 2293 if (c == NULL || (c->flags & CHN_F_MMAP_INVALID) || 2294 (*offset + size) > sndbuf_getallocsize(c->bufsoft) || 2295 (wrch != NULL && (wrch->flags & CHN_F_MMAP_INVALID)) || 2296 (rdch != NULL && (rdch->flags & CHN_F_MMAP_INVALID))) { 2297 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 2298 PCM_GIANT_EXIT(d); 2299 return (EINVAL); 2300 } 2301 2302 if (wrch != NULL) 2303 wrch->flags |= CHN_F_MMAP; 2304 if (rdch != NULL) 2305 rdch->flags |= CHN_F_MMAP; 2306 2307 *offset = (uintptr_t)sndbuf_getbufofs(c->bufsoft, *offset); 2308 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 2309 *object = vm_pager_allocate(OBJT_DEVICE, i_dev, 2310 size, nprot, *offset, curthread->td_ucred); 2311 2312 PCM_GIANT_LEAVE(d); 2313 2314 if (*object == NULL) 2315 return (EINVAL); 2316 return (0); 2317 } 2318 2319 /* So much for dev_stdclone() */ 2320 static int 2321 dsp_stdclone(char *name, char *namep, char *sep, int use_sep, int *u, int *c) 2322 { 2323 size_t len; 2324 2325 len = strlen(namep); 2326 if (strncmp(name, namep, len) != 0) 2327 return (ENODEV); 2328 2329 name += len; 2330 2331 if (isdigit(*name) == 0) 2332 return (ENODEV); 2333 2334 len = strlen(sep); 2335 2336 if (*name == '' && !(name[1] == '\0' || bcmp(name + 1, sep, len) == 0)) 2337 return (ENODEV); 2338 2339 for (*u = 0; isdigit(*name) != 0; name++) { 2340 *u *= 10; 2341 *u += *name - ''; 2342 if (*u > dsp_umax) 2343 return (ENODEV); 2344 } 2345 2346 if (*name == '\0') 2347 return ((use_sep == 0) ? 0 : ENODEV); 2348 2349 if (bcmp(name, sep, len) != 0 || isdigit(name[len]) == 0) 2350 return (ENODEV); 2351 2352 name += len; 2353 2354 if (*name == '' && name[1] != '\0') 2355 return (ENODEV); 2356 2357 for (*c = 0; isdigit(*name) != 0; name++) { 2358 *c *= 10; 2359 *c += *name - ''; 2360 if (*c > dsp_cmax) 2361 return (ENODEV); 2362 } 2363 2364 if (*name != '\0') 2365 return (ENODEV); 2366 2367 return (0); 2368 } 2369 2370 static void 2371 dsp_clone(void *arg, 2372 struct ucred *cred, 2373 char *name, int namelen, struct cdev **dev) 2374 { 2375 struct snddev_info *d; 2376 struct snd_clone_entry *ce; 2377 struct pcm_channel *c; 2378 int i, unit, udcmask, cunit, devtype, devhw, devcmax, tumax; 2379 char *devname, *devcmp, *devsep; 2380 2381 KASSERT(dsp_umax >= 0 && dsp_cmax >= 0, ("Uninitialized unit!")); 2382 2383 if (*dev != NULL) 2384 return; 2385 2386 unit = -1; 2387 cunit = -1; 2388 devtype = -1; 2389 devhw = 0; 2390 devcmax = -1; 2391 tumax = -1; 2392 devname = NULL; 2393 devsep = NULL; 2394 2395 for (i = 0; unit == -1 && 2396 i < (sizeof(dsp_cdevs) / sizeof(dsp_cdevs[0])); i++) { 2397 devtype = dsp_cdevs[i].type; 2398 devcmp = dsp_cdevs[i].name; 2399 devsep = dsp_cdevs[i].sep; 2400 devname = dsp_cdevs[i].alias; 2401 if (devname == NULL) 2402 devname = devcmp; 2403 devhw = dsp_cdevs[i].hw; 2404 devcmax = dsp_cdevs[i].max - 1; 2405 if (strcmp(name, devcmp) == 0) { 2406 if (dsp_basename_clone != 0) 2407 unit = snd_unit; 2408 } else if (dsp_stdclone(name, devcmp, devsep, 2409 dsp_cdevs[i].use_sep, &unit, &cunit) != 0) { 2410 unit = -1; 2411 cunit = -1; 2412 } 2413 } 2414 2415 d = devclass_get_softc(pcm_devclass, unit); 2416 if (!PCM_REGISTERED(d) || d->clones == NULL) 2417 return; 2418 2419 /* XXX Need Giant magic entry ??? */ 2420 2421 PCM_LOCK(d); 2422 if (snd_clone_disabled(d->clones)) { 2423 PCM_UNLOCK(d); 2424 return; 2425 } 2426 2427 PCM_WAIT(d); 2428 PCM_ACQUIRE(d); 2429 PCM_UNLOCK(d); 2430 2431 udcmask = snd_u2unit(unit) | snd_d2unit(devtype); 2432 2433 if (devhw != 0) { 2434 KASSERT(devcmax <= dsp_cmax, 2435 ("overflow: devcmax=%d, dsp_cmax=%d", devcmax, dsp_cmax)); 2436 if (cunit > devcmax) { 2437 PCM_RELEASE_QUICK(d); 2438 return; 2439 } 2440 udcmask |= snd_c2unit(cunit); 2441 CHN_FOREACH(c, d, channels.pcm) { 2442 CHN_LOCK(c); 2443 if (c->unit != udcmask) { 2444 CHN_UNLOCK(c); 2445 continue; 2446 } 2447 CHN_UNLOCK(c); 2448 udcmask &= ~snd_c2unit(cunit); 2449 /* 2450 * Temporarily increase clone maxunit to overcome 2451 * vchan flexibility. 2452 * 2453 * # sysctl dev.pcm.0.play.vchans=256 2454 * dev.pcm.0.play.vchans: 1 -> 256 2455 * # cat /dev/zero > /dev/dsp0.vp255 & 2456 * [1] 17296 2457 * # sysctl dev.pcm.0.play.vchans=0 2458 * dev.pcm.0.play.vchans: 256 -> 1 2459 * # fg 2460 * [1] + running cat /dev/zero > /dev/dsp0.vp255 2461 * ^C 2462 * # cat /dev/zero > /dev/dsp0.vp255 2463 * zsh: operation not supported: /dev/dsp0.vp255 2464 */ 2465 tumax = snd_clone_getmaxunit(d->clones); 2466 if (cunit > tumax) 2467 snd_clone_setmaxunit(d->clones, cunit); 2468 else 2469 tumax = -1; 2470 goto dsp_clone_alloc; 2471 } 2472 /* 2473 * Ok, so we're requesting unallocated vchan, but still 2474 * within maximum vchan limit. 2475 */ 2476 if (((devtype == SND_DEV_DSPHW_VPLAY && d->pvchancount > 0) || 2477 (devtype == SND_DEV_DSPHW_VREC && d->rvchancount > 0)) && 2478 cunit < snd_maxautovchans) { 2479 udcmask &= ~snd_c2unit(cunit); 2480 tumax = snd_clone_getmaxunit(d->clones); 2481 if (cunit > tumax) 2482 snd_clone_setmaxunit(d->clones, cunit); 2483 else 2484 tumax = -1; 2485 goto dsp_clone_alloc; 2486 } 2487 PCM_RELEASE_QUICK(d); 2488 return; 2489 } 2490 2491 dsp_clone_alloc: 2492 ce = snd_clone_alloc(d->clones, dev, &cunit, udcmask); 2493 if (tumax != -1) 2494 snd_clone_setmaxunit(d->clones, tumax); 2495 if (ce != NULL) { 2496 udcmask |= snd_c2unit(cunit); 2497 *dev = make_dev(&dsp_cdevsw, PCMMINOR(udcmask), 2498 UID_ROOT, GID_WHEEL, 0666, "%s%d%s%d", 2499 devname, unit, devsep, cunit); 2500 snd_clone_register(ce, *dev); 2501 } 2502 2503 PCM_RELEASE_QUICK(d); 2504 2505 if (*dev != NULL) 2506 dev_ref(*dev); 2507 } 2508 2509 static void 2510 dsp_sysinit(void *p) 2511 { 2512 if (dsp_ehtag != NULL) 2513 return; 2514 /* initialize unit numbering */ 2515 snd_unit_init(); 2516 dsp_umax = PCMMAXUNIT; 2517 dsp_cmax = PCMMAXCHAN; 2518 dsp_ehtag = EVENTHANDLER_REGISTER(dev_clone, dsp_clone, 0, 1000); 2519 } 2520 2521 static void 2522 dsp_sysuninit(void *p) 2523 { 2524 if (dsp_ehtag == NULL) 2525 return; 2526 EVENTHANDLER_DEREGISTER(dev_clone, dsp_ehtag); 2527 dsp_ehtag = NULL; 2528 } 2529 2530 SYSINIT(dsp_sysinit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysinit, NULL); 2531 SYSUNINIT(dsp_sysuninit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysuninit, NULL); 2532 2533 char * 2534 dsp_unit2name(char *buf, size_t len, int unit) 2535 { 2536 int i, dtype; 2537 2538 KASSERT(buf != NULL && len != 0, 2539 ("bogus buf=%p len=%ju", buf, (uintmax_t)len)); 2540 2541 dtype = snd_unit2d(unit); 2542 2543 for (i = 0; i < (sizeof(dsp_cdevs) / sizeof(dsp_cdevs[0])); i++) { 2544 if (dtype != dsp_cdevs[i].type || dsp_cdevs[i].alias != NULL) 2545 continue; 2546 snprintf(buf, len, "%s%d%s%d", dsp_cdevs[i].name, 2547 snd_unit2u(unit), dsp_cdevs[i].sep, snd_unit2c(unit)); 2548 return (buf); 2549 } 2550 2551 return (NULL); 2552 } 2553 2554 /** 2555 * @brief Handler for SNDCTL_AUDIOINFO. 2556 * 2557 * Gathers information about the audio device specified in ai->dev. If 2558 * ai->dev == -1, then this function gathers information about the current 2559 * device. If the call comes in on a non-audio device and ai->dev == -1, 2560 * return EINVAL. 2561 * 2562 * This routine is supposed to go practically straight to the hardware, 2563 * getting capabilities directly from the sound card driver, side-stepping 2564 * the intermediate channel interface. 2565 * 2566 * Note, however, that the usefulness of this command is significantly 2567 * decreased when requesting info about any device other than the one serving 2568 * the request. While each snddev_channel refers to a specific device node, 2569 * the converse is *not* true. Currently, when a sound device node is opened, 2570 * the sound subsystem scans for an available audio channel (or channels, if 2571 * opened in read+write) and then assigns them to the si_drv[12] private 2572 * data fields. As a result, any information returned linking a channel to 2573 * a specific character device isn't necessarily accurate. 2574 * 2575 * @note 2576 * Calling threads must not hold any snddev_info or pcm_channel locks. 2577 * 2578 * @param dev device on which the ioctl was issued 2579 * @param ai ioctl request data container 2580 * 2581 * @retval 0 success 2582 * @retval EINVAL ai->dev specifies an invalid device 2583 * 2584 * @todo Verify correctness of Doxygen tags. ;) 2585 */ 2586 int 2587 dsp_oss_audioinfo(struct cdev *i_dev, oss_audioinfo *ai) 2588 { 2589 struct pcmchan_caps *caps; 2590 struct pcm_channel *ch; 2591 struct snddev_info *d; 2592 uint32_t fmts; 2593 int i, nchan, *rates, minch, maxch; 2594 char *devname, buf[CHN_NAMELEN]; 2595 2596 /* 2597 * If probing the device that received the ioctl, make sure it's a 2598 * DSP device. (Users may use this ioctl with /dev/mixer and 2599 * /dev/midi.) 2600 */ 2601 if (ai->dev == -1 && i_dev->si_devsw != &dsp_cdevsw) 2602 return (EINVAL); 2603 2604 ch = NULL; 2605 devname = NULL; 2606 nchan = 0; 2607 bzero(buf, sizeof(buf)); 2608 2609 /* 2610 * Search for the requested audio device (channel). Start by 2611 * iterating over pcm devices. 2612 */ 2613 for (i = 0; pcm_devclass != NULL && 2614 i < devclass_get_maxunit(pcm_devclass); i++) { 2615 d = devclass_get_softc(pcm_devclass, i); 2616 if (!PCM_REGISTERED(d)) 2617 continue; 2618 2619 /* XXX Need Giant magic entry ??? */ 2620 2621 /* See the note in function docblock */ 2622 PCM_UNLOCKASSERT(d); 2623 PCM_LOCK(d); 2624 2625 CHN_FOREACH(ch, d, channels.pcm) { 2626 CHN_UNLOCKASSERT(ch); 2627 CHN_LOCK(ch); 2628 if (ai->dev == -1) { 2629 if (DSP_REGISTERED(d, i_dev) && 2630 (ch == PCM_RDCH(i_dev) || /* record ch */ 2631 ch == PCM_WRCH(i_dev))) { /* playback ch */ 2632 devname = dsp_unit2name(buf, 2633 sizeof(buf), ch->unit); 2634 } 2635 } else if (ai->dev == nchan) { 2636 devname = dsp_unit2name(buf, sizeof(buf), 2637 ch->unit); 2638 } 2639 if (devname != NULL) 2640 break; 2641 CHN_UNLOCK(ch); 2642 ++nchan; 2643 } 2644 2645 if (devname != NULL) { 2646 /* 2647 * At this point, the following synchronization stuff 2648 * has happened: 2649 * - a specific PCM device is locked. 2650 * - a specific audio channel has been locked, so be 2651 * sure to unlock when exiting; 2652 */ 2653 2654 caps = chn_getcaps(ch); 2655 2656 /* 2657 * With all handles collected, zero out the user's 2658 * container and begin filling in its fields. 2659 */ 2660 bzero((void *)ai, sizeof(oss_audioinfo)); 2661 2662 ai->dev = nchan; 2663 strlcpy(ai->name, ch->name, sizeof(ai->name)); 2664 2665 if ((ch->flags & CHN_F_BUSY) == 0) 2666 ai->busy = 0; 2667 else 2668 ai->busy = (ch->direction == PCMDIR_PLAY) ? OPEN_WRITE : OPEN_READ; 2669 2670 /** 2671 * @note 2672 * @c cmd - OSSv4 docs: "Only supported under Linux at 2673 * this moment." Cop-out, I know, but I'll save 2674 * running around in the process table for later. 2675 * Is there a risk of leaking information? 2676 */ 2677 ai->pid = ch->pid; 2678 2679 /* 2680 * These flags stolen from SNDCTL_DSP_GETCAPS handler. 2681 * Note, however, that a single channel operates in 2682 * only one direction, so PCM_CAP_DUPLEX is out. 2683 */ 2684 /** 2685 * @todo @c SNDCTL_AUDIOINFO::caps - Make drivers keep 2686 * these in pcmchan::caps? 2687 */ 2688 ai->caps = PCM_CAP_REALTIME | PCM_CAP_MMAP | PCM_CAP_TRIGGER | 2689 ((ch->flags & CHN_F_VIRTUAL) ? PCM_CAP_VIRTUAL : 0) | 2690 ((ch->direction == PCMDIR_PLAY) ? PCM_CAP_OUTPUT : PCM_CAP_INPUT); 2691 2692 /* 2693 * Collect formats supported @b natively by the 2694 * device. Also determine min/max channels. (I.e., 2695 * mono, stereo, or both?) 2696 * 2697 * If any channel is stereo, maxch = 2; 2698 * if all channels are stereo, minch = 2, too; 2699 * if any channel is mono, minch = 1; 2700 * and if all channels are mono, maxch = 1. 2701 */ 2702 minch = 0; 2703 maxch = 0; 2704 fmts = 0; 2705 for (i = 0; caps->fmtlist[i]; i++) { 2706 fmts |= caps->fmtlist[i]; 2707 if (AFMT_CHANNEL(caps->fmtlist[i]) > 1) { 2708 minch = (minch == 0) ? 2 : minch; 2709 maxch = 2; 2710 } else { 2711 minch = 1; 2712 maxch = (maxch == 0) ? 1 : maxch; 2713 } 2714 } 2715 2716 if (ch->direction == PCMDIR_PLAY) 2717 ai->oformats = fmts; 2718 else 2719 ai->iformats = fmts; 2720 2721 /** 2722 * @note 2723 * @c magic - OSSv4 docs: "Reserved for internal use 2724 * by OSS." 2725 * 2726 * @par 2727 * @c card_number - OSSv4 docs: "Number of the sound 2728 * card where this device belongs or -1 if this 2729 * information is not available. Applications 2730 * should normally not use this field for any 2731 * purpose." 2732 */ 2733 ai->card_number = -1; 2734 /** 2735 * @todo @c song_name - depends first on 2736 * SNDCTL_[GS]ETSONG @todo @c label - depends 2737 * on SNDCTL_[GS]ETLABEL 2738 * @todo @c port_number - routing information? 2739 */ 2740 ai->port_number = -1; 2741 ai->mixer_dev = (d->mixer_dev != NULL) ? PCMUNIT(d->mixer_dev) : -1; 2742 /** 2743 * @note 2744 * @c real_device - OSSv4 docs: "Obsolete." 2745 */ 2746 ai->real_device = -1; 2747 strlcpy(ai->devnode, "/dev/", sizeof(ai->devnode)); 2748 strlcat(ai->devnode, devname, sizeof(ai->devnode)); 2749 ai->enabled = device_is_attached(d->dev) ? 1 : 0; 2750 /** 2751 * @note 2752 * @c flags - OSSv4 docs: "Reserved for future use." 2753 * 2754 * @note 2755 * @c binding - OSSv4 docs: "Reserved for future use." 2756 * 2757 * @todo @c handle - haven't decided how to generate 2758 * this yet; bus, vendor, device IDs? 2759 */ 2760 ai->min_rate = caps->minspeed; 2761 ai->max_rate = caps->maxspeed; 2762 2763 ai->min_channels = minch; 2764 ai->max_channels = maxch; 2765 2766 ai->nrates = chn_getrates(ch, &rates); 2767 if (ai->nrates > OSS_MAX_SAMPLE_RATES) 2768 ai->nrates = OSS_MAX_SAMPLE_RATES; 2769 2770 for (i = 0; i < ai->nrates; i++) 2771 ai->rates[i] = rates[i]; 2772 2773 ai->next_play_engine = 0; 2774 ai->next_rec_engine = 0; 2775 2776 CHN_UNLOCK(ch); 2777 } 2778 2779 PCM_UNLOCK(d); 2780 2781 if (devname != NULL) 2782 return (0); 2783 } 2784 2785 /* Exhausted the search -- nothing is locked, so return. */ 2786 return (EINVAL); 2787 } 2788 2789 /** 2790 * @brief Assigns a PCM channel to a sync group. 2791 * 2792 * Sync groups are used to enable audio operations on multiple devices 2793 * simultaneously. They may be used with any number of devices and may 2794 * span across applications. Devices are added to groups with 2795 * the SNDCTL_DSP_SYNCGROUP ioctl, and operations are triggered with the 2796 * SNDCTL_DSP_SYNCSTART ioctl. 2797 * 2798 * If the @c id field of the @c group parameter is set to zero, then a new 2799 * sync group is created. Otherwise, wrch and rdch (if set) are added to 2800 * the group specified. 2801 * 2802 * @todo As far as memory allocation, should we assume that things are 2803 * okay and allocate with M_WAITOK before acquiring channel locks, 2804 * freeing later if not? 2805 * 2806 * @param wrch output channel associated w/ device (if any) 2807 * @param rdch input channel associated w/ device (if any) 2808 * @param group Sync group parameters 2809 * 2810 * @retval 0 success 2811 * @retval non-zero error to be propagated upstream 2812 */ 2813 static int 2814 dsp_oss_syncgroup(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_syncgroup *group) 2815 { 2816 struct pcmchan_syncmember *smrd, *smwr; 2817 struct pcmchan_syncgroup *sg; 2818 int ret, sg_ids[3]; 2819 2820 smrd = NULL; 2821 smwr = NULL; 2822 sg = NULL; 2823 ret = 0; 2824 2825 /* 2826 * Free_unr() may sleep, so store released syncgroup IDs until after 2827 * all locks are released. 2828 */ 2829 sg_ids[0] = sg_ids[1] = sg_ids[2] = 0; 2830 2831 PCM_SG_LOCK(); 2832 2833 /* 2834 * - Insert channel(s) into group's member list. 2835 * - Set CHN_F_NOTRIGGER on channel(s). 2836 * - Stop channel(s). 2837 */ 2838 2839 /* 2840 * If device's channels are already mapped to a group, unmap them. 2841 */ 2842 if (wrch) { 2843 CHN_LOCK(wrch); 2844 sg_ids[0] = chn_syncdestroy(wrch); 2845 } 2846 2847 if (rdch) { 2848 CHN_LOCK(rdch); 2849 sg_ids[1] = chn_syncdestroy(rdch); 2850 } 2851 2852 /* 2853 * Verify that mode matches character device properites. 2854 * - Bail if PCM_ENABLE_OUTPUT && wrch == NULL. 2855 * - Bail if PCM_ENABLE_INPUT && rdch == NULL. 2856 */ 2857 if (((wrch == NULL) && (group->mode & PCM_ENABLE_OUTPUT)) || 2858 ((rdch == NULL) && (group->mode & PCM_ENABLE_INPUT))) { 2859 ret = EINVAL; 2860 goto out; 2861 } 2862 2863 /* 2864 * An id of zero indicates the user wants to create a new 2865 * syncgroup. 2866 */ 2867 if (group->id == 0) { 2868 sg = (struct pcmchan_syncgroup *)malloc(sizeof(*sg), M_DEVBUF, M_NOWAIT); 2869 if (sg != NULL) { 2870 SLIST_INIT(&sg->members); 2871 sg->id = alloc_unr(pcmsg_unrhdr); 2872 2873 group->id = sg->id; 2874 SLIST_INSERT_HEAD(&snd_pcm_syncgroups, sg, link); 2875 } else 2876 ret = ENOMEM; 2877 } else { 2878 SLIST_FOREACH(sg, &snd_pcm_syncgroups, link) { 2879 if (sg->id == group->id) 2880 break; 2881 } 2882 if (sg == NULL) 2883 ret = EINVAL; 2884 } 2885 2886 /* Couldn't create or find a syncgroup. Fail. */ 2887 if (sg == NULL) 2888 goto out; 2889 2890 /* 2891 * Allocate a syncmember, assign it and a channel together, and 2892 * insert into syncgroup. 2893 */ 2894 if (group->mode & PCM_ENABLE_INPUT) { 2895 smrd = (struct pcmchan_syncmember *)malloc(sizeof(*smrd), M_DEVBUF, M_NOWAIT); 2896 if (smrd == NULL) { 2897 ret = ENOMEM; 2898 goto out; 2899 } 2900 2901 SLIST_INSERT_HEAD(&sg->members, smrd, link); 2902 smrd->parent = sg; 2903 smrd->ch = rdch; 2904 2905 chn_abort(rdch); 2906 rdch->flags |= CHN_F_NOTRIGGER; 2907 rdch->sm = smrd; 2908 } 2909 2910 if (group->mode & PCM_ENABLE_OUTPUT) { 2911 smwr = (struct pcmchan_syncmember *)malloc(sizeof(*smwr), M_DEVBUF, M_NOWAIT); 2912 if (smwr == NULL) { 2913 ret = ENOMEM; 2914 goto out; 2915 } 2916 2917 SLIST_INSERT_HEAD(&sg->members, smwr, link); 2918 smwr->parent = sg; 2919 smwr->ch = wrch; 2920 2921 chn_abort(wrch); 2922 wrch->flags |= CHN_F_NOTRIGGER; 2923 wrch->sm = smwr; 2924 } 2925 2926 out: 2927 if (ret != 0) { 2928 if (smrd != NULL) 2929 free(smrd, M_DEVBUF); 2930 if ((sg != NULL) && SLIST_EMPTY(&sg->members)) { 2931 sg_ids[2] = sg->id; 2932 SLIST_REMOVE(&snd_pcm_syncgroups, sg, pcmchan_syncgroup, link); 2933 free(sg, M_DEVBUF); 2934 } 2935 2936 if (wrch) 2937 wrch->sm = NULL; 2938 if (rdch) 2939 rdch->sm = NULL; 2940 } 2941 2942 if (wrch) 2943 CHN_UNLOCK(wrch); 2944 if (rdch) 2945 CHN_UNLOCK(rdch); 2946 2947 PCM_SG_UNLOCK(); 2948 2949 if (sg_ids[0]) 2950 free_unr(pcmsg_unrhdr, sg_ids[0]); 2951 if (sg_ids[1]) 2952 free_unr(pcmsg_unrhdr, sg_ids[1]); 2953 if (sg_ids[2]) 2954 free_unr(pcmsg_unrhdr, sg_ids[2]); 2955 2956 return (ret); 2957 } 2958 2959 /** 2960 * @brief Launch a sync group into action 2961 * 2962 * Sync groups are established via SNDCTL_DSP_SYNCGROUP. This function 2963 * iterates over all members, triggering them along the way. 2964 * 2965 * @note Caller must not hold any channel locks. 2966 * 2967 * @param sg_id sync group identifier 2968 * 2969 * @retval 0 success 2970 * @retval non-zero error worthy of propagating upstream to user 2971 */ 2972 static int 2973 dsp_oss_syncstart(int sg_id) 2974 { 2975 struct pcmchan_syncmember *sm, *sm_tmp; 2976 struct pcmchan_syncgroup *sg; 2977 struct pcm_channel *c; 2978 int ret, needlocks; 2979 2980 /* Get the synclists lock */ 2981 PCM_SG_LOCK(); 2982 2983 do { 2984 ret = 0; 2985 needlocks = 0; 2986 2987 /* Search for syncgroup by ID */ 2988 SLIST_FOREACH(sg, &snd_pcm_syncgroups, link) { 2989 if (sg->id == sg_id) 2990 break; 2991 } 2992 2993 /* Return EINVAL if not found */ 2994 if (sg == NULL) { 2995 ret = EINVAL; 2996 break; 2997 } 2998 2999 /* Any removals resulting in an empty group should've handled this */ 3000 KASSERT(!SLIST_EMPTY(&sg->members), ("found empty syncgroup")); 3001 3002 /* 3003 * Attempt to lock all member channels - if any are already 3004 * locked, unlock those acquired, sleep for a bit, and try 3005 * again. 3006 */ 3007 SLIST_FOREACH(sm, &sg->members, link) { 3008 if (CHN_TRYLOCK(sm->ch) == 0) { 3009 int timo = hz * 5/1000; 3010 if (timo < 1) 3011 timo = 1; 3012 3013 /* Release all locked channels so far, retry */ 3014 SLIST_FOREACH(sm_tmp, &sg->members, link) { 3015 /* sm is the member already locked */ 3016 if (sm == sm_tmp) 3017 break; 3018 CHN_UNLOCK(sm_tmp->ch); 3019 } 3020 3021 /** @todo Is PRIBIO correct/ */ 3022 ret = msleep(sm, &snd_pcm_syncgroups_mtx, 3023 PRIBIO | PCATCH, "pcmsg", timo); 3024 if (ret == EINTR || ret == ERESTART) 3025 break; 3026 3027 needlocks = 1; 3028 ret = 0; /* Assumes ret == EAGAIN... */ 3029 } 3030 } 3031 } while (needlocks && ret == 0); 3032 3033 /* Proceed only if no errors encountered. */ 3034 if (ret == 0) { 3035 /* Launch channels */ 3036 while ((sm = SLIST_FIRST(&sg->members)) != NULL) { 3037 SLIST_REMOVE_HEAD(&sg->members, link); 3038 3039 c = sm->ch; 3040 c->sm = NULL; 3041 chn_start(c, 1); 3042 c->flags &= ~CHN_F_NOTRIGGER; 3043 CHN_UNLOCK(c); 3044 3045 free(sm, M_DEVBUF); 3046 } 3047 3048 SLIST_REMOVE(&snd_pcm_syncgroups, sg, pcmchan_syncgroup, link); 3049 free(sg, M_DEVBUF); 3050 } 3051 3052 PCM_SG_UNLOCK(); 3053 3054 /* 3055 * Free_unr() may sleep, so be sure to give up the syncgroup lock 3056 * first. 3057 */ 3058 if (ret == 0) 3059 free_unr(pcmsg_unrhdr, sg_id); 3060 3061 return (ret); 3062 } 3063 3064 /** 3065 * @brief Handler for SNDCTL_DSP_POLICY 3066 * 3067 * The SNDCTL_DSP_POLICY ioctl is a simpler interface to control fragment 3068 * size and count like with SNDCTL_DSP_SETFRAGMENT. Instead of the user 3069 * specifying those two parameters, s/he simply selects a number from 0..10 3070 * which corresponds to a buffer size. Smaller numbers request smaller 3071 * buffers with lower latencies (at greater overhead from more frequent 3072 * interrupts), while greater numbers behave in the opposite manner. 3073 * 3074 * The 4Front spec states that a value of 5 should be the default. However, 3075 * this implementation deviates slightly by using a linear scale without 3076 * consulting drivers. I.e., even though drivers may have different default 3077 * buffer sizes, a policy argument of 5 will have the same result across 3078 * all drivers. 3079 * 3080 * See http://manuals.opensound.com/developer/SNDCTL_DSP_POLICY.html for 3081 * more information. 3082 * 3083 * @todo When SNDCTL_DSP_COOKEDMODE is supported, it'll be necessary to 3084 * work with hardware drivers directly. 3085 * 3086 * @note PCM channel arguments must not be locked by caller. 3087 * 3088 * @param wrch Pointer to opened playback channel (optional; may be NULL) 3089 * @param rdch " recording channel (optional; may be NULL) 3090 * @param policy Integer from [0:10] 3091 * 3092 * @retval 0 constant (for now) 3093 */ 3094 static int 3095 dsp_oss_policy(struct pcm_channel *wrch, struct pcm_channel *rdch, int policy) 3096 { 3097 int ret; 3098 3099 if (policy < CHN_POLICY_MIN || policy > CHN_POLICY_MAX) 3100 return (EIO); 3101 3102 /* Default: success */ 3103 ret = 0; 3104 3105 if (rdch) { 3106 CHN_LOCK(rdch); 3107 ret = chn_setlatency(rdch, policy); 3108 CHN_UNLOCK(rdch); 3109 } 3110 3111 if (wrch && ret == 0) { 3112 CHN_LOCK(wrch); 3113 ret = chn_setlatency(wrch, policy); 3114 CHN_UNLOCK(wrch); 3115 } 3116 3117 if (ret) 3118 ret = EIO; 3119 3120 return (ret); 3121 } 3122 3123 /** 3124 * @brief Enable or disable "cooked" mode 3125 * 3126 * This is a handler for @c SNDCTL_DSP_COOKEDMODE. When in cooked mode, which 3127 * is the default, the sound system handles rate and format conversions 3128 * automatically (ex: user writing 11025Hz/8 bit/unsigned but card only 3129 * operates with 44100Hz/16bit/signed samples). 3130 * 3131 * Disabling cooked mode is intended for applications wanting to mmap() 3132 * a sound card's buffer space directly, bypassing the FreeBSD 2-stage 3133 * feeder architecture, presumably to gain as much control over audio 3134 * hardware as possible. 3135 * 3136 * See @c http://manuals.opensound.com/developer/SNDCTL_DSP_COOKEDMODE.html 3137 * for more details. 3138 * 3139 * @param wrch playback channel (optional; may be NULL) 3140 * @param rdch recording channel (optional; may be NULL) 3141 * @param enabled 0 = raw mode, 1 = cooked mode 3142 * 3143 * @retval EINVAL Operation not yet supported. 3144 */ 3145 static int 3146 dsp_oss_cookedmode(struct pcm_channel *wrch, struct pcm_channel *rdch, int enabled) 3147 { 3148 3149 /* 3150 * XXX I just don't get it. Why don't they call it 3151 * "BITPERFECT" ~ SNDCTL_DSP_BITPERFECT !?!?. 3152 * This is just plain so confusing, incoherent, 3153 * <insert any non-printable characters here>. 3154 */ 3155 if (!(enabled == 1 || enabled == 0)) 3156 return (EINVAL); 3157 3158 /* 3159 * I won't give in. I'm inverting its logic here and now. 3160 * Brag all you want, but "BITPERFECT" should be the better 3161 * term here. 3162 */ 3163 enabled ^= 0x00000001; 3164 3165 if (wrch != NULL) { 3166 CHN_LOCK(wrch); 3167 wrch->flags &= ~CHN_F_BITPERFECT; 3168 wrch->flags |= (enabled != 0) ? CHN_F_BITPERFECT : 0x00000000; 3169 CHN_UNLOCK(wrch); 3170 } 3171 3172 if (rdch != NULL) { 3173 CHN_LOCK(rdch); 3174 rdch->flags &= ~CHN_F_BITPERFECT; 3175 rdch->flags |= (enabled != 0) ? CHN_F_BITPERFECT : 0x00000000; 3176 CHN_UNLOCK(rdch); 3177 } 3178 3179 return (0); 3180 } 3181 3182 /** 3183 * @brief Retrieve channel interleaving order 3184 * 3185 * This is the handler for @c SNDCTL_DSP_GET_CHNORDER. 3186 * 3187 * See @c http://manuals.opensound.com/developer/SNDCTL_DSP_GET_CHNORDER.html 3188 * for more details. 3189 * 3190 * @note As the ioctl definition is still under construction, FreeBSD 3191 * does not currently support SNDCTL_DSP_GET_CHNORDER. 3192 * 3193 * @param wrch playback channel (optional; may be NULL) 3194 * @param rdch recording channel (optional; may be NULL) 3195 * @param map channel map (result will be stored there) 3196 * 3197 * @retval EINVAL Operation not yet supported. 3198 */ 3199 static int 3200 dsp_oss_getchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map) 3201 { 3202 struct pcm_channel *ch; 3203 int ret; 3204 3205 ch = (wrch != NULL) ? wrch : rdch; 3206 if (ch != NULL) { 3207 CHN_LOCK(ch); 3208 ret = chn_oss_getorder(ch, map); 3209 CHN_UNLOCK(ch); 3210 } else 3211 ret = EINVAL; 3212 3213 return (ret); 3214 } 3215 3216 /** 3217 * @brief Specify channel interleaving order 3218 * 3219 * This is the handler for @c SNDCTL_DSP_SET_CHNORDER. 3220 * 3221 * @note As the ioctl definition is still under construction, FreeBSD 3222 * does not currently support @c SNDCTL_DSP_SET_CHNORDER. 3223 * 3224 * @param wrch playback channel (optional; may be NULL) 3225 * @param rdch recording channel (optional; may be NULL) 3226 * @param map channel map 3227 * 3228 * @retval EINVAL Operation not yet supported. 3229 */ 3230 static int 3231 dsp_oss_setchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map) 3232 { 3233 int ret; 3234 3235 ret = 0; 3236 3237 if (wrch != NULL) { 3238 CHN_LOCK(wrch); 3239 ret = chn_oss_setorder(wrch, map); 3240 CHN_UNLOCK(wrch); 3241 } 3242 3243 if (ret == 0 && rdch != NULL) { 3244 CHN_LOCK(rdch); 3245 ret = chn_oss_setorder(rdch, map); 3246 CHN_UNLOCK(rdch); 3247 } 3248 3249 return (ret); 3250 } 3251 3252 static int 3253 dsp_oss_getchannelmask(struct pcm_channel *wrch, struct pcm_channel *rdch, 3254 int *mask) 3255 { 3256 struct pcm_channel *ch; 3257 uint32_t chnmask; 3258 int ret; 3259 3260 chnmask = 0; 3261 ch = (wrch != NULL) ? wrch : rdch; 3262 3263 if (ch != NULL) { 3264 CHN_LOCK(ch); 3265 ret = chn_oss_getmask(ch, &chnmask); 3266 CHN_UNLOCK(ch); 3267 } else 3268 ret = EINVAL; 3269 3270 if (ret == 0) 3271 *mask = chnmask; 3272 3273 return (ret); 3274 } 3275 3276 #ifdef OSSV4_EXPERIMENT 3277 /** 3278 * @brief Retrieve an audio device's label 3279 * 3280 * This is a handler for the @c SNDCTL_GETLABEL ioctl. 3281 * 3282 * See @c http://manuals.opensound.com/developer/SNDCTL_GETLABEL.html 3283 * for more details. 3284 * 3285 * From Hannu@4Front: "For example ossxmix (just like some HW mixer 3286 * consoles) can show variable "labels" for certain controls. By default 3287 * the application name (say quake) is shown as the label but 3288 * applications may change the labels themselves." 3289 * 3290 * @note As the ioctl definition is still under construction, FreeBSD 3291 * does not currently support @c SNDCTL_GETLABEL. 3292 * 3293 * @param wrch playback channel (optional; may be NULL) 3294 * @param rdch recording channel (optional; may be NULL) 3295 * @param label label gets copied here 3296 * 3297 * @retval EINVAL Operation not yet supported. 3298 */ 3299 static int 3300 dsp_oss_getlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label) 3301 { 3302 return (EINVAL); 3303 } 3304 3305 /** 3306 * @brief Specify an audio device's label 3307 * 3308 * This is a handler for the @c SNDCTL_SETLABEL ioctl. Please see the 3309 * comments for @c dsp_oss_getlabel immediately above. 3310 * 3311 * See @c http://manuals.opensound.com/developer/SNDCTL_GETLABEL.html 3312 * for more details. 3313 * 3314 * @note As the ioctl definition is still under construction, FreeBSD 3315 * does not currently support SNDCTL_SETLABEL. 3316 * 3317 * @param wrch playback channel (optional; may be NULL) 3318 * @param rdch recording channel (optional; may be NULL) 3319 * @param label label gets copied from here 3320 * 3321 * @retval EINVAL Operation not yet supported. 3322 */ 3323 static int 3324 dsp_oss_setlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label) 3325 { 3326 return (EINVAL); 3327 } 3328 3329 /** 3330 * @brief Retrieve name of currently played song 3331 * 3332 * This is a handler for the @c SNDCTL_GETSONG ioctl. Audio players could 3333 * tell the system the name of the currently playing song, which would be 3334 * visible in @c /dev/sndstat. 3335 * 3336 * See @c http://manuals.opensound.com/developer/SNDCTL_GETSONG.html 3337 * for more details. 3338 * 3339 * @note As the ioctl definition is still under construction, FreeBSD 3340 * does not currently support SNDCTL_GETSONG. 3341 * 3342 * @param wrch playback channel (optional; may be NULL) 3343 * @param rdch recording channel (optional; may be NULL) 3344 * @param song song name gets copied here 3345 * 3346 * @retval EINVAL Operation not yet supported. 3347 */ 3348 static int 3349 dsp_oss_getsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song) 3350 { 3351 return (EINVAL); 3352 } 3353 3354 /** 3355 * @brief Retrieve name of currently played song 3356 * 3357 * This is a handler for the @c SNDCTL_SETSONG ioctl. Audio players could 3358 * tell the system the name of the currently playing song, which would be 3359 * visible in @c /dev/sndstat. 3360 * 3361 * See @c http://manuals.opensound.com/developer/SNDCTL_SETSONG.html 3362 * for more details. 3363 * 3364 * @note As the ioctl definition is still under construction, FreeBSD 3365 * does not currently support SNDCTL_SETSONG. 3366 * 3367 * @param wrch playback channel (optional; may be NULL) 3368 * @param rdch recording channel (optional; may be NULL) 3369 * @param song song name gets copied from here 3370 * 3371 * @retval EINVAL Operation not yet supported. 3372 */ 3373 static int 3374 dsp_oss_setsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song) 3375 { 3376 return (EINVAL); 3377 } 3378 3379 /** 3380 * @brief Rename a device 3381 * 3382 * This is a handler for the @c SNDCTL_SETNAME ioctl. 3383 * 3384 * See @c http://manuals.opensound.com/developer/SNDCTL_SETNAME.html for 3385 * more details. 3386 * 3387 * From Hannu@4Front: "This call is used to change the device name 3388 * reported in /dev/sndstat and ossinfo. So instead of using some generic 3389 * 'OSS loopback audio (MIDI) driver' the device may be given a meaningfull 3390 * name depending on the current context (for example 'OSS virtual wave table 3391 * synth' or 'VoIP link to London')." 3392 * 3393 * @note As the ioctl definition is still under construction, FreeBSD 3394 * does not currently support SNDCTL_SETNAME. 3395 * 3396 * @param wrch playback channel (optional; may be NULL) 3397 * @param rdch recording channel (optional; may be NULL) 3398 * @param name new device name gets copied from here 3399 * 3400 * @retval EINVAL Operation not yet supported. 3401 */ 3402 static int 3403 dsp_oss_setname(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *name) 3404 { 3405 return (EINVAL); 3406 } 3407 #endif /* !OSSV4_EXPERIMENT */
Cache object: e198103a3ba95cf245b726daa5a93173
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