File:  [DragonFly] / src / sys / dev / sound / pcm / dsp.c
Revision 1.6: download - view: text, annotated - select for diffs
Wed May 19 22:52:50 2004 UTC (10 years, 6 months ago) by dillon
Branches: MAIN
CVS tags: HEAD
Device layer rollup commit.

* cdevsw_add() is now required.  cdevsw_add() and cdevsw_remove() may specify
  a mask/match indicating the range of supported minor numbers.  Multiple
  cdevsw_add()'s using the same major number, but distinctly different
  ranges, may be issued.  All devices that failed to call cdevsw_add() before
  now do.

* cdevsw_remove() now automatically marks all devices within its supported
  range as being destroyed.

* vnode->v_rdev is no longer resolved when the vnode is created.  Instead,
  only v_udev (a newly added field) is resolved.  v_rdev is resolved when
  the vnode is opened and cleared on the last close.

* A great deal of code was making rather dubious assumptions with regards
  to the validity of devices associated with vnodes, primarily due to
  the persistence of a device structure due to being indexed by (major, minor)
  instead of by (cdevsw, major, minor).  In particular, if you run a program
  which connects to a USB device and then you pull the USB device and plug
  it back in, the vnode subsystem will continue to believe that the device
  is open when, in fact, it isn't (because it was destroyed and recreated).

  In particular, note that all the VFS mount procedures now check devices
  via v_udev instead of v_rdev prior to calling VOP_OPEN(), since v_rdev
  is NULL prior to the first open.

* The disk layer's device interaction has been rewritten.  The disk layer
  (i.e. the slice and disklabel management layer) no longer overloads
  its data onto the device structure representing the underlying physical
  disk.  Instead, the disk layer uses the new cdevsw_add() functionality
  to register its own cdevsw using the underlying device's major number,
  and simply does NOT register the underlying device's cdevsw.  No
  confusion is created because the device hash is now based on
  (cdevsw,major,minor) rather then (major,minor).

  NOTE: This also means that underlying raw disk devices may use the entire
  device minor number instead of having to reserve the bits used by the disk
  layer, and also means that can we (theoretically) stack a fully
  disklabel-supported 'disk' on top of any block device.

* The new reference counting scheme prevents this by associating a device
  with a cdevsw and disconnecting the device from its cdevsw when the cdevsw
  is removed.  Additionally, all udev2dev() lookups run through the cdevsw
  mask/match and only successfully find devices still associated with an
  active cdevsw.

* Major work on MFS:  MFS no longer shortcuts vnode and device creation.  It
  now creates a real vnode and a real device and implements real open and
  close VOPs.  Additionally, due to the disk layer changes, MFS is no longer
  limited to 255 mounts.  The new limit is 16 million.  Since MFS creates a
  real device node, mount_mfs will now create a real /dev/mfs<PID> device
  that can be read from userland (e.g. so you can dump an MFS filesystem).

* BUF AND DEVICE STRATEGY changes.  The struct buf contains a b_dev field.
  In order to properly handle stacked devices we now require that the b_dev
  field be initialized before the device strategy routine is called.  This
  required some additional work in various VFS implementations.  To enforce
  this requirement, biodone() now sets b_dev to NODEV.  The new disk layer
  will adjust b_dev before forwarding a request to the actual physical
  device.

* A bug in the ISO CD boot sequence which resulted in a panic has been fixed.

Testing by: lots of people, but David Rhodus found the most aggregious bugs.

    1: /*
    2:  * Copyright (c) 1999 Cameron Grant <gandalf@vilnya.demon.co.uk>
    3:  * All rights reserved.
    4:  *
    5:  * Redistribution and use in source and binary forms, with or without
    6:  * modification, are permitted provided that the following conditions
    7:  * are met:
    8:  * 1. Redistributions of source code must retain the above copyright
    9:  *    notice, this list of conditions and the following disclaimer.
   10:  * 2. Redistributions in binary form must reproduce the above copyright
   11:  *    notice, this list of conditions and the following disclaimer in the
   12:  *    documentation and/or other materials provided with the distribution.
   13:  *
   14:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24:  * SUCH DAMAGE.
   25:  *
   26:  * $FreeBSD: src/sys/dev/sound/pcm/dsp.c,v 1.15.2.13 2002/08/30 13:53:03 orion Exp $
   27:  * $DragonFly: src/sys/dev/sound/pcm/dsp.c,v 1.6 2004/05/19 22:52:50 dillon Exp $
   28:  */
   29: 
   30: #include <sys/param.h>
   31: #include <sys/queue.h>
   32: 
   33: #include <dev/sound/pcm/sound.h>
   34: 
   35: SND_DECLARE_FILE("$DragonFly: src/sys/dev/sound/pcm/dsp.c,v 1.6 2004/05/19 22:52:50 dillon Exp $");
   36: 
   37: #define OLDPCM_IOCTL
   38: 
   39: static d_open_t dsp_open;
   40: static d_close_t dsp_close;
   41: static d_read_t dsp_read;
   42: static d_write_t dsp_write;
   43: static d_ioctl_t dsp_ioctl;
   44: static d_poll_t dsp_poll;
   45: static d_mmap_t dsp_mmap;
   46: 
   47: static struct cdevsw dsp_cdevsw = {
   48: 	/* name */	"dsp",
   49: 	/* maj */	SND_CDEV_MAJOR,
   50: 	/* flags */	0,
   51: 	/* port */	NULL,
   52: 	/* clone */	NULL,
   53: 
   54: 	/* open */	dsp_open,
   55: 	/* close */	dsp_close,
   56: 	/* read */	dsp_read,
   57: 	/* write */	dsp_write,
   58: 	/* ioctl */	dsp_ioctl,
   59: 	/* poll */	dsp_poll,
   60: 	/* mmap */	dsp_mmap,
   61: 	/* strategy */	nostrategy,
   62: 	/* dump */	nodump,
   63: 	/* psize */	nopsize
   64: };
   65: 
   66: #ifdef USING_DEVFS
   67: static eventhandler_tag dsp_ehtag;
   68: #endif
   69: 
   70: static struct snddev_info *
   71: dsp_get_info(dev_t dev)
   72: {
   73: 	struct snddev_info *d;
   74: 	int unit;
   75: 
   76: 	unit = PCMUNIT(dev);
   77: 	if (unit >= devclass_get_maxunit(pcm_devclass))
   78: 		return NULL;
   79: 	d = devclass_get_softc(pcm_devclass, unit);
   80: 
   81: 	return d;
   82: }
   83: 
   84: static u_int32_t
   85: dsp_get_flags(dev_t dev)
   86: {
   87: 	device_t bdev;
   88: 	int unit;
   89: 
   90: 	unit = PCMUNIT(dev);
   91: 	if (unit >= devclass_get_maxunit(pcm_devclass))
   92: 		return 0xffffffff;
   93: 	bdev = devclass_get_device(pcm_devclass, unit);
   94: 
   95: 	return pcm_getflags(bdev);
   96: }
   97: 
   98: static void
   99: dsp_set_flags(dev_t dev, u_int32_t flags)
  100: {
  101: 	device_t bdev;
  102: 	int unit;
  103: 
  104: 	unit = PCMUNIT(dev);
  105: 	if (unit >= devclass_get_maxunit(pcm_devclass))
  106: 		return;
  107: 	bdev = devclass_get_device(pcm_devclass, unit);
  108: 
  109: 	pcm_setflags(bdev, flags);
  110: }
  111: 
  112: /*
  113:  * return the channels channels associated with an open device instance.
  114:  * set the priority if the device is simplex and one direction (only) is
  115:  * specified.
  116:  * lock channels specified.
  117:  */
  118: static int
  119: getchns(dev_t dev, struct pcm_channel **rdch, struct pcm_channel **wrch, u_int32_t prio)
  120: {
  121: 	struct snddev_info *d;
  122: 	u_int32_t flags;
  123: 
  124: 	flags = dsp_get_flags(dev);
  125: 	d = dsp_get_info(dev);
  126: 	pcm_lock(d);
  127: 	pcm_inprog(d, 1);
  128: 	KASSERT((flags & SD_F_PRIO_SET) != SD_F_PRIO_SET, \
  129: 		("getchns: read and write both prioritised"));
  130: 
  131: 	if ((flags & SD_F_PRIO_SET) == 0 && (prio != (SD_F_PRIO_RD | SD_F_PRIO_WR))) {
  132: 		flags |= prio & (SD_F_PRIO_RD | SD_F_PRIO_WR);
  133: 		dsp_set_flags(dev, flags);
  134: 	}
  135: 
  136: 	*rdch = dev->si_drv1;
  137: 	*wrch = dev->si_drv2;
  138: 	if ((flags & SD_F_SIMPLEX) && (flags & SD_F_PRIO_SET)) {
  139: 		if (prio) {
  140: 			if (*rdch && flags & SD_F_PRIO_WR) {
  141: 				dev->si_drv1 = NULL;
  142: 				*rdch = pcm_getfakechan(d);
  143: 			} else if (*wrch && flags & SD_F_PRIO_RD) {
  144: 				dev->si_drv2 = NULL;
  145: 				*wrch = pcm_getfakechan(d);
  146: 			}
  147: 		}
  148: 
  149: 		pcm_getfakechan(d)->flags |= CHN_F_BUSY;
  150: 	}
  151: 	pcm_unlock(d);
  152: 
  153: 	if (*rdch && *rdch != pcm_getfakechan(d) && (prio & SD_F_PRIO_RD))
  154: 		CHN_LOCK(*rdch);
  155: 	if (*wrch && *wrch != pcm_getfakechan(d) && (prio & SD_F_PRIO_WR))
  156: 		CHN_LOCK(*wrch);
  157: 
  158: 	return 0;
  159: }
  160: 
  161: /* unlock specified channels */
  162: static void
  163: relchns(dev_t dev, struct pcm_channel *rdch, struct pcm_channel *wrch, u_int32_t prio)
  164: {
  165: 	struct snddev_info *d;
  166: 
  167: 	d = dsp_get_info(dev);
  168: 	if (wrch && wrch != pcm_getfakechan(d) && (prio & SD_F_PRIO_WR))
  169: 		CHN_UNLOCK(wrch);
  170: 	if (rdch && rdch != pcm_getfakechan(d) && (prio & SD_F_PRIO_RD))
  171: 		CHN_UNLOCK(rdch);
  172: 	pcm_lock(d);
  173: 	pcm_inprog(d, -1);
  174: 	pcm_unlock(d);
  175: }
  176: 
  177: static int
  178: dsp_open(dev_t i_dev, int flags, int mode, struct thread *td)
  179: {
  180: 	struct pcm_channel *rdch, *wrch;
  181: 	struct snddev_info *d;
  182: 	intrmask_t s;
  183: 	u_int32_t fmt;
  184: 	int devtype;
  185: 	struct proc *p = td->td_proc;
  186: 
  187: 	KKASSERT(p != NULL);
  188: 
  189: 	s = spltty();
  190: 	d = dsp_get_info(i_dev);
  191: 	devtype = PCMDEV(i_dev);
  192: 
  193: 	/* decide default format */
  194: 	switch (devtype) {
  195: 	case SND_DEV_DSP16:
  196: 		fmt = AFMT_S16_LE;
  197: 		break;
  198: 
  199: 	case SND_DEV_DSP:
  200: 		fmt = AFMT_U8;
  201: 		break;
  202: 
  203: 	case SND_DEV_AUDIO:
  204: 		fmt = AFMT_MU_LAW;
  205: 		break;
  206: 
  207: 	case SND_DEV_NORESET:
  208: 		fmt = 0;
  209: 		break;
  210: 
  211: 	case SND_DEV_DSPREC:
  212: 		fmt = AFMT_U8;
  213: 		if (mode & FWRITE) {
  214: 			splx(s);
  215: 			return EINVAL;
  216: 		}
  217: 		break;
  218: 
  219: 	default:
  220: 		panic("impossible devtype %d", devtype);
  221: 	}
  222: 
  223: 	/* lock snddev so nobody else can monkey with it */
  224: 	pcm_lock(d);
  225: 
  226: 	rdch = i_dev->si_drv1;
  227: 	wrch = i_dev->si_drv2;
  228: 
  229: 	if ((dsp_get_flags(i_dev) & SD_F_SIMPLEX) && (rdch || wrch)) {
  230: 		/* simplex device, already open, exit */
  231: 		pcm_unlock(d);
  232: 		splx(s);
  233: 		return EBUSY;
  234: 	}
  235: 
  236: 	if (((flags & FREAD) && rdch) || ((flags & FWRITE) && wrch)) {
  237: 		/* device already open in one or both directions */
  238: 		pcm_unlock(d);
  239: 		splx(s);
  240: 		return EBUSY;
  241: 	}
  242: 
  243: 	/*  if we get here, the open request is valid */
  244: 	if (flags & FREAD) {
  245: 		/* open for read */
  246: 		if (devtype == SND_DEV_DSPREC)
  247: 			rdch = pcm_chnalloc(d, PCMDIR_REC, p->p_pid, PCMCHAN(i_dev));
  248: 		else
  249: 			rdch = pcm_chnalloc(d, PCMDIR_REC, p->p_pid, -1);
  250: 		if (!rdch) {
  251: 			/* no channel available, exit */
  252: 			pcm_unlock(d);
  253: 			splx(s);
  254: 			return EBUSY;
  255: 		}
  256: 		/* got a channel, already locked for us */
  257: 	}
  258: 
  259: 	if (flags & FWRITE) {
  260: 		/* open for write */
  261: 		wrch = pcm_chnalloc(d, PCMDIR_PLAY, p->p_pid, -1);
  262: 		if (!wrch) {
  263: 			/* no channel available */
  264: 			if (rdch && (flags & FREAD)) {
  265: 				/* just opened a read channel, release it */
  266: 				pcm_chnrelease(rdch);
  267: 			}
  268: 				/* exit */
  269: 			pcm_unlock(d);
  270: 			splx(s);
  271: 			return EBUSY;
  272: 		}
  273: 		/* got a channel, already locked for us */
  274: 	}
  275: 
  276: 	i_dev->si_drv1 = rdch;
  277: 	i_dev->si_drv2 = wrch;
  278: 	pcm_unlock(d);
  279: 	/* finished with snddev, new channels still locked */
  280: 
  281: 	/* bump refcounts, reset and unlock any channels that we just opened */
  282: 	if (flags & FREAD) {
  283: 		if (chn_reset(rdch, fmt)) {
  284: 			pcm_lock(d);
  285: 			pcm_chnrelease(rdch);
  286: 			if (wrch && (flags & FWRITE))
  287: 				pcm_chnrelease(wrch);
  288: 			pcm_unlock(d);
  289: 			splx(s);
  290: 			return ENODEV;
  291: 		}
  292: 		if (flags & O_NONBLOCK)
  293: 			rdch->flags |= CHN_F_NBIO;
  294: 		pcm_chnref(rdch, 1);
  295: 	 	CHN_UNLOCK(rdch);
  296: 	}
  297: 	if (flags & FWRITE) {
  298: 		if (chn_reset(wrch, fmt)) {
  299: 			pcm_lock(d);
  300: 			pcm_chnrelease(wrch);
  301: 			if (flags & FREAD) {
  302: 				CHN_LOCK(rdch);
  303: 				pcm_chnref(rdch, -1);
  304: 				pcm_chnrelease(rdch);
  305: 				CHN_UNLOCK(rdch);
  306: 			}
  307: 			pcm_unlock(d);
  308: 			splx(s);
  309: 			return ENODEV;
  310: 		}
  311: 		if (flags & O_NONBLOCK)
  312: 			wrch->flags |= CHN_F_NBIO;
  313: 		pcm_chnref(wrch, 1);
  314: 	 	CHN_UNLOCK(wrch);
  315: 	}
  316: 	splx(s);
  317: 	return 0;
  318: }
  319: 
  320: static int
  321: dsp_close(dev_t i_dev, int flags, int mode, struct thread *td)
  322: {
  323: 	struct pcm_channel *rdch, *wrch;
  324: 	struct snddev_info *d;
  325: 	intrmask_t s;
  326: 	int exit;
  327: 
  328: 	s = spltty();
  329: 	d = dsp_get_info(i_dev);
  330: 	pcm_lock(d);
  331: 	rdch = i_dev->si_drv1;
  332: 	wrch = i_dev->si_drv2;
  333: 
  334: 	exit = 0;
  335: 
  336: 	/* decrement refcount for each channel, exit if nonzero */
  337: 	if (rdch) {
  338: 		CHN_LOCK(rdch);
  339: 		if (pcm_chnref(rdch, -1) > 0) {
  340: 			CHN_UNLOCK(rdch);
  341: 			exit = 1;
  342: 		}
  343: 	}
  344: 	if (wrch) {
  345: 		CHN_LOCK(wrch);
  346: 		if (pcm_chnref(wrch, -1) > 0) {
  347: 			CHN_UNLOCK(wrch);
  348: 			exit = 1;
  349: 		}
  350: 	}
  351: 	if (exit) {
  352: 		pcm_unlock(d);
  353: 		splx(s);
  354: 		return 0;
  355: 	}
  356: 
  357: 	/* both refcounts are zero, abort and release */
  358: 
  359: 	if (pcm_getfakechan(d))
  360: 		pcm_getfakechan(d)->flags = 0;
  361: 
  362: 	i_dev->si_drv1 = NULL;
  363: 	i_dev->si_drv2 = NULL;
  364: 
  365: 	dsp_set_flags(i_dev, dsp_get_flags(i_dev) & ~SD_F_TRANSIENT);
  366: 	pcm_unlock(d);
  367: 
  368: 	if (rdch) {
  369: 		chn_abort(rdch); /* won't sleep */
  370: 		rdch->flags &= ~(CHN_F_RUNNING | CHN_F_MAPPED | CHN_F_DEAD);
  371: 		chn_reset(rdch, 0);
  372: 		pcm_chnrelease(rdch);
  373: 	}
  374: 	if (wrch) {
  375: 		chn_flush(wrch); /* may sleep */
  376: 		wrch->flags &= ~(CHN_F_RUNNING | CHN_F_MAPPED | CHN_F_DEAD);
  377: 		chn_reset(wrch, 0);
  378: 		pcm_chnrelease(wrch);
  379: 	}
  380: 
  381: 	splx(s);
  382: 	return 0;
  383: }
  384: 
  385: static int
  386: dsp_read(dev_t i_dev, struct uio *buf, int flag)
  387: {
  388: 	struct pcm_channel *rdch, *wrch;
  389: 	intrmask_t s;
  390: 	int ret;
  391: 
  392: 	s = spltty();
  393: 	getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD);
  394: 
  395: 	KASSERT(rdch, ("dsp_read: nonexistant channel"));
  396: 	KASSERT(rdch->flags & CHN_F_BUSY, ("dsp_read: nonbusy channel"));
  397: 
  398: 	if (rdch->flags & (CHN_F_MAPPED | CHN_F_DEAD)) {
  399: 		relchns(i_dev, rdch, wrch, SD_F_PRIO_RD);
  400: 		splx(s);
  401: 		return EINVAL;
  402: 	}
  403: 	if (!(rdch->flags & CHN_F_RUNNING))
  404: 		rdch->flags |= CHN_F_RUNNING;
  405: 	ret = chn_read(rdch, buf);
  406: 	relchns(i_dev, rdch, wrch, SD_F_PRIO_RD);
  407: 
  408: 	splx(s);
  409: 	return ret;
  410: }
  411: 
  412: static int
  413: dsp_write(dev_t i_dev, struct uio *buf, int flag)
  414: {
  415: 	struct pcm_channel *rdch, *wrch;
  416: 	intrmask_t s;
  417: 	int ret;
  418: 
  419: 	s = spltty();
  420: 	getchns(i_dev, &rdch, &wrch, SD_F_PRIO_WR);
  421: 
  422: 	KASSERT(wrch, ("dsp_write: nonexistant channel"));
  423: 	KASSERT(wrch->flags & CHN_F_BUSY, ("dsp_write: nonbusy channel"));
  424: 
  425: 	if (wrch->flags & (CHN_F_MAPPED | CHN_F_DEAD)) {
  426: 		relchns(i_dev, rdch, wrch, SD_F_PRIO_WR);
  427: 		splx(s);
  428: 		return EINVAL;
  429: 	}
  430: 	if (!(wrch->flags & CHN_F_RUNNING))
  431: 		wrch->flags |= CHN_F_RUNNING;
  432: 	ret = chn_write(wrch, buf);
  433: 	relchns(i_dev, rdch, wrch, SD_F_PRIO_WR);
  434: 
  435: 	splx(s);
  436: 	return ret;
  437: }
  438: 
  439: static int
  440: dsp_ioctl(dev_t i_dev, u_long cmd, caddr_t arg, int mode, struct thread *td)
  441: {
  442:     	struct pcm_channel *wrch, *rdch;
  443: 	struct snddev_info *d;
  444: 	intrmask_t s;
  445: 	int kill;
  446:     	int ret = 0, *arg_i = (int *)arg, tmp;
  447: 
  448: 	/*
  449: 	 * this is an evil hack to allow broken apps to perform mixer ioctls
  450: 	 * on dsp devices.
  451: 	 */
  452: 
  453: 	if (IOCGROUP(cmd) == 'M') {
  454: 		dev_t pdev;
  455: 
  456: 		pdev = make_adhoc_dev(&dsp_cdevsw, 
  457: 				PCMMKMINOR(PCMUNIT(i_dev), SND_DEV_CTL, 0));
  458: 		return mixer_ioctl(pdev, cmd, arg, mode, td);
  459: 	}
  460: 
  461:     	s = spltty();
  462: 	d = dsp_get_info(i_dev);
  463: 	getchns(i_dev, &rdch, &wrch, 0);
  464: 
  465: 	kill = 0;
  466: 	if (wrch && (wrch->flags & CHN_F_DEAD))
  467: 		kill |= 1;
  468: 	if (rdch && (rdch->flags & CHN_F_DEAD))
  469: 		kill |= 2;
  470: 	if (kill == 3) {
  471: 		relchns(i_dev, rdch, wrch, 0);
  472: 		splx(s);
  473: 		return EINVAL;
  474: 	}
  475: 	if (kill & 1)
  476: 		wrch = NULL;
  477: 	if (kill & 2)
  478: 		rdch = NULL;
  479: 
  480:     	switch(cmd) {
  481: #ifdef OLDPCM_IOCTL
  482:     	/*
  483:      	 * we start with the new ioctl interface.
  484:      	 */
  485:     	case AIONWRITE:	/* how many bytes can write ? */
  486: /*
  487: 		if (wrch && wrch->bufhard.dl)
  488: 			while (chn_wrfeed(wrch) == 0);
  489: */
  490: 		*arg_i = wrch? sndbuf_getfree(wrch->bufsoft) : 0;
  491: 		break;
  492: 
  493:     	case AIOSSIZE:     /* set the current blocksize */
  494: 		{
  495: 	    		struct snd_size *p = (struct snd_size *)arg;
  496: 
  497: 			p->play_size = 0;
  498: 			p->rec_size = 0;
  499: 	    		if (wrch) {
  500: 				CHN_LOCK(wrch);
  501: 				chn_setblocksize(wrch, 2, p->play_size);
  502: 				p->play_size = sndbuf_getblksz(wrch->bufsoft);
  503: 				CHN_UNLOCK(wrch);
  504: 			}
  505: 	    		if (rdch) {
  506: 				CHN_LOCK(rdch);
  507: 				chn_setblocksize(rdch, 2, p->rec_size);
  508: 				p->rec_size = sndbuf_getblksz(rdch->bufsoft);
  509: 				CHN_UNLOCK(rdch);
  510: 			}
  511: 		}
  512: 		break;
  513:     	case AIOGSIZE:	/* get the current blocksize */
  514: 		{
  515: 	    		struct snd_size *p = (struct snd_size *)arg;
  516: 
  517: 	    		if (wrch)
  518: 				p->play_size = sndbuf_getblksz(wrch->bufsoft);
  519: 	    		if (rdch)
  520: 				p->rec_size = sndbuf_getblksz(rdch->bufsoft);
  521: 		}
  522: 		break;
  523: 
  524:     	case AIOSFMT:
  525: 		{
  526: 	    		snd_chan_param *p = (snd_chan_param *)arg;
  527: 
  528: 	    		if (wrch) {
  529: 				CHN_LOCK(wrch);
  530: 				chn_setformat(wrch, p->play_format);
  531: 				chn_setspeed(wrch, p->play_rate);
  532: 				CHN_UNLOCK(wrch);
  533: 	    		}
  534: 	    		if (rdch) {
  535: 				CHN_LOCK(rdch);
  536: 				chn_setformat(rdch, p->rec_format);
  537: 				chn_setspeed(rdch, p->rec_rate);
  538: 				CHN_UNLOCK(rdch);
  539: 	    		}
  540: 		}
  541: 		/* FALLTHROUGH */
  542: 
  543:     	case AIOGFMT:
  544: 		{
  545: 	    		snd_chan_param *p = (snd_chan_param *)arg;
  546: 
  547: 	    		p->play_rate = wrch? wrch->speed : 0;
  548: 	    		p->rec_rate = rdch? rdch->speed : 0;
  549: 	    		p->play_format = wrch? wrch->format : 0;
  550: 	    		p->rec_format = rdch? rdch->format : 0;
  551: 		}
  552: 		break;
  553: 
  554:     	case AIOGCAP:     /* get capabilities */
  555: 		{
  556: 	    		snd_capabilities *p = (snd_capabilities *)arg;
  557: 			struct pcmchan_caps *pcaps = NULL, *rcaps = NULL;
  558: 			dev_t pdev;
  559: 
  560: 			if (rdch) {
  561: 				CHN_LOCK(rdch);
  562: 				rcaps = chn_getcaps(rdch);
  563: 			}
  564: 			if (wrch) {
  565: 				CHN_LOCK(wrch);
  566: 				pcaps = chn_getcaps(wrch);
  567: 			}
  568: 	    		p->rate_min = max(rcaps? rcaps->minspeed : 0,
  569: 	                      		  pcaps? pcaps->minspeed : 0);
  570: 	    		p->rate_max = min(rcaps? rcaps->maxspeed : 1000000,
  571: 	                      		  pcaps? pcaps->maxspeed : 1000000);
  572: 	    		p->bufsize = min(rdch? sndbuf_getsize(rdch->bufsoft) : 1000000,
  573: 	                     		 wrch? sndbuf_getsize(wrch->bufsoft) : 1000000);
  574: 			/* XXX bad on sb16 */
  575: 	    		p->formats = (rdch? chn_getformats(rdch) : 0xffffffff) &
  576: 			 	     (wrch? chn_getformats(wrch) : 0xffffffff);
  577: 			if (rdch && wrch)
  578: 				p->formats |= (dsp_get_flags(i_dev) & SD_F_SIMPLEX)? 0 : AFMT_FULLDUPLEX;
  579: 			pdev = make_adhoc_dev(&dsp_cdevsw, PCMMKMINOR(PCMUNIT(i_dev), SND_DEV_CTL, 0));
  580: 	    		p->mixers = 1; /* default: one mixer */
  581: 	    		p->inputs = pdev->si_drv1? mix_getdevs(pdev->si_drv1) : 0;
  582: 	    		p->left = p->right = 100;
  583: 			if (wrch)
  584: 				CHN_UNLOCK(wrch);
  585: 			if (rdch)
  586: 				CHN_UNLOCK(rdch);
  587: 		}
  588: 		break;
  589: 
  590:     	case AIOSTOP:
  591: 		if (*arg_i == AIOSYNC_PLAY && wrch)
  592: 			*arg_i = chn_abort(wrch);
  593: 		else if (*arg_i == AIOSYNC_CAPTURE && rdch)
  594: 			*arg_i = chn_abort(rdch);
  595: 		else {
  596: 	   	 	printf("AIOSTOP: bad channel 0x%x\n", *arg_i);
  597: 	    		*arg_i = 0;
  598: 		}
  599: 		break;
  600: 
  601:     	case AIOSYNC:
  602: 		printf("AIOSYNC chan 0x%03lx pos %lu unimplemented\n",
  603: 	    		((snd_sync_parm *)arg)->chan, ((snd_sync_parm *)arg)->pos);
  604: 		break;
  605: #endif
  606: 	/*
  607: 	 * here follow the standard ioctls (filio.h etc.)
  608: 	 */
  609:     	case FIONREAD: /* get # bytes to read */
  610: /*		if (rdch && rdch->bufhard.dl)
  611: 			while (chn_rdfeed(rdch) == 0);
  612: */		*arg_i = rdch? sndbuf_getready(rdch->bufsoft) : 0;
  613: 		break;
  614: 
  615:     	case FIOASYNC: /*set/clear async i/o */
  616: 		DEB( printf("FIOASYNC\n") ; )
  617: 		break;
  618: 
  619:     	case SNDCTL_DSP_NONBLOCK:
  620:     	case FIONBIO: /* set/clear non-blocking i/o */
  621: 		if (rdch)
  622: 			rdch->flags &= ~CHN_F_NBIO;
  623: 		if (wrch)
  624: 			wrch->flags &= ~CHN_F_NBIO;
  625: 		if (*arg_i) {
  626: 		    	if (rdch)
  627: 				rdch->flags |= CHN_F_NBIO;
  628: 		    	if (wrch)
  629: 				wrch->flags |= CHN_F_NBIO;
  630: 		}
  631: 		break;
  632: 
  633:     	/*
  634: 	 * Finally, here is the linux-compatible ioctl interface
  635: 	 */
  636: #define THE_REAL_SNDCTL_DSP_GETBLKSIZE _IOWR('P', 4, int)
  637:     	case THE_REAL_SNDCTL_DSP_GETBLKSIZE:
  638:     	case SNDCTL_DSP_GETBLKSIZE:
  639: 		if (wrch)
  640: 			*arg_i = sndbuf_getblksz(wrch->bufsoft);
  641: 		else if (rdch)
  642: 			*arg_i = sndbuf_getblksz(rdch->bufsoft);
  643: 		else
  644: 			*arg_i = 0;
  645: 		break ;
  646: 
  647:     	case SNDCTL_DSP_SETBLKSIZE:
  648: 		RANGE(*arg_i, 16, 65536);
  649: 		if (wrch) {
  650: 			CHN_LOCK(wrch);
  651: 			chn_setblocksize(wrch, 2, *arg_i);
  652: 			CHN_UNLOCK(wrch);
  653: 		}
  654: 		if (rdch) {
  655: 			CHN_LOCK(rdch);
  656: 			chn_setblocksize(rdch, 2, *arg_i);
  657: 			CHN_UNLOCK(rdch);
  658: 		}
  659: 		break;
  660: 
  661:     	case SNDCTL_DSP_RESET:
  662: 		DEB(printf("dsp reset\n"));
  663: 		if (wrch)
  664: 			chn_abort(wrch);
  665: 		if (rdch)
  666: 			chn_abort(rdch);
  667: 		break;
  668: 
  669:     	case SNDCTL_DSP_SYNC:
  670: 		DEB(printf("dsp sync\n"));
  671: 		/* chn_sync may sleep */
  672: 		if (wrch) {
  673: 			CHN_LOCK(wrch);
  674: 			chn_sync(wrch, sndbuf_getsize(wrch->bufsoft) - 4);
  675: 			CHN_UNLOCK(wrch);
  676: 		}
  677: 		break;
  678: 
  679:     	case SNDCTL_DSP_SPEED:
  680: 		/* chn_setspeed may sleep */
  681: 		tmp = 0;
  682: 		if (wrch) {
  683: 			CHN_LOCK(wrch);
  684: 			ret = chn_setspeed(wrch, *arg_i);
  685: 			tmp = wrch->speed;
  686: 			CHN_UNLOCK(wrch);
  687: 		}
  688: 		if (rdch && ret == 0) {
  689: 			CHN_LOCK(rdch);
  690: 			ret = chn_setspeed(rdch, *arg_i);
  691: 			if (tmp == 0)
  692: 				tmp = rdch->speed;
  693: 			CHN_UNLOCK(rdch);
  694: 		}
  695: 		*arg_i = tmp;
  696: 		break;
  697: 
  698:     	case SOUND_PCM_READ_RATE:
  699: 		*arg_i = wrch? wrch->speed : rdch->speed;
  700: 		break;
  701: 
  702:     	case SNDCTL_DSP_STEREO:
  703: 		tmp = -1;
  704: 		*arg_i = (*arg_i)? AFMT_STEREO : 0;
  705: 		if (wrch) {
  706: 			CHN_LOCK(wrch);
  707: 			ret = chn_setformat(wrch, (wrch->format & ~AFMT_STEREO) | *arg_i);
  708: 			tmp = (wrch->format & AFMT_STEREO)? 1 : 0;
  709: 			CHN_UNLOCK(wrch);
  710: 		}
  711: 		if (rdch && ret == 0) {
  712: 			CHN_LOCK(rdch);
  713: 			ret = chn_setformat(rdch, (rdch->format & ~AFMT_STEREO) | *arg_i);
  714: 			if (tmp == -1)
  715: 				tmp = (rdch->format & AFMT_STEREO)? 1 : 0;
  716: 			CHN_UNLOCK(rdch);
  717: 		}
  718: 		*arg_i = tmp;
  719: 		break;
  720: 
  721:     	case SOUND_PCM_WRITE_CHANNELS:
  722: /*	case SNDCTL_DSP_CHANNELS: ( == SOUND_PCM_WRITE_CHANNELS) */
  723: 		if (*arg_i != 0) {
  724: 			tmp = 0;
  725: 			*arg_i = (*arg_i != 1)? AFMT_STEREO : 0;
  726: 	  		if (wrch) {
  727: 				CHN_LOCK(wrch);
  728: 				ret = chn_setformat(wrch, (wrch->format & ~AFMT_STEREO) | *arg_i);
  729: 				tmp = (wrch->format & AFMT_STEREO)? 2 : 1;
  730: 				CHN_UNLOCK(wrch);
  731: 			}
  732: 			if (rdch && ret == 0) {
  733: 				CHN_LOCK(rdch);
  734: 				ret = chn_setformat(rdch, (rdch->format & ~AFMT_STEREO) | *arg_i);
  735: 				if (tmp == 0)
  736: 					tmp = (rdch->format & AFMT_STEREO)? 2 : 1;
  737: 				CHN_UNLOCK(rdch);
  738: 			}
  739: 			*arg_i = tmp;
  740: 		} else {
  741: 			*arg_i = ((wrch? wrch->format : rdch->format) & AFMT_STEREO)? 2 : 1;
  742: 		}
  743: 		break;
  744: 
  745:     	case SOUND_PCM_READ_CHANNELS:
  746: 		*arg_i = ((wrch? wrch->format : rdch->format) & AFMT_STEREO)? 2 : 1;
  747: 		break;
  748: 
  749:     	case SNDCTL_DSP_GETFMTS:	/* returns a mask of supported fmts */
  750: 		*arg_i = wrch? chn_getformats(wrch) : chn_getformats(rdch);
  751: 		break ;
  752: 
  753:     	case SNDCTL_DSP_SETFMT:	/* sets _one_ format */
  754: 		/* XXX locking */
  755: 		if ((*arg_i != AFMT_QUERY)) {
  756: 			tmp = 0;
  757: 			if (wrch) {
  758: 				CHN_LOCK(wrch);
  759: 				ret = chn_setformat(wrch, (*arg_i) | (wrch->format & AFMT_STEREO));
  760: 				tmp = wrch->format & ~AFMT_STEREO;
  761: 				CHN_UNLOCK(wrch);
  762: 			}
  763: 			if (rdch && ret == 0) {
  764: 				CHN_LOCK(rdch);
  765: 				ret = chn_setformat(rdch, (*arg_i) | (rdch->format & AFMT_STEREO));
  766: 				if (tmp == 0)
  767: 					tmp = rdch->format & ~AFMT_STEREO;
  768: 				CHN_UNLOCK(rdch);
  769: 			}
  770: 			*arg_i = tmp;
  771: 		} else
  772: 			*arg_i = (wrch? wrch->format : rdch->format) & ~AFMT_STEREO;
  773: 		break;
  774: 
  775:     	case SNDCTL_DSP_SETFRAGMENT:
  776: 		/* XXX locking */
  777: 		DEB(printf("SNDCTL_DSP_SETFRAGMENT 0x%08x\n", *(int *)arg));
  778: 		{
  779: 			u_int32_t fragln = (*arg_i) & 0x0000ffff;
  780: 			u_int32_t maxfrags = ((*arg_i) & 0xffff0000) >> 16;
  781: 			u_int32_t fragsz;
  782: 
  783: 			RANGE(fragln, 4, 16);
  784: 			fragsz = 1 << fragln;
  785: 
  786: 			if (maxfrags == 0)
  787: 				maxfrags = CHN_2NDBUFMAXSIZE / fragsz;
  788: 			if (maxfrags < 2) {
  789: 				ret = EINVAL;
  790: 				break;
  791: 			}
  792: 			if (maxfrags * fragsz > CHN_2NDBUFMAXSIZE)
  793: 				maxfrags = CHN_2NDBUFMAXSIZE / fragsz;
  794: 
  795: 			DEB(printf("SNDCTL_DSP_SETFRAGMENT %d frags, %d sz\n", maxfrags, fragsz));
  796: 		    	if (rdch) {
  797: 				CHN_LOCK(rdch);
  798: 				ret = chn_setblocksize(rdch, maxfrags, fragsz);
  799: 				maxfrags = sndbuf_getblkcnt(rdch->bufsoft);
  800: 				fragsz = sndbuf_getblksz(rdch->bufsoft);
  801: 				CHN_UNLOCK(rdch);
  802: 			}
  803: 		    	if (wrch && ret == 0) {
  804: 				CHN_LOCK(wrch);
  805: 				ret = chn_setblocksize(wrch, maxfrags, fragsz);
  806:  				maxfrags = sndbuf_getblkcnt(wrch->bufsoft);
  807: 				fragsz = sndbuf_getblksz(wrch->bufsoft);
  808: 				CHN_UNLOCK(wrch);
  809: 			}
  810: 
  811: 			fragln = 0;
  812: 			while (fragsz > 1) {
  813: 				fragln++;
  814: 				fragsz >>= 1;
  815: 			}
  816: 	    		*arg_i = (maxfrags << 16) | fragln;
  817: 		}
  818: 		break;
  819: 
  820:     	case SNDCTL_DSP_GETISPACE:
  821: 		/* return the size of data available in the input queue */
  822: 		{
  823: 	    		audio_buf_info *a = (audio_buf_info *)arg;
  824: 	    		if (rdch) {
  825: 	        		struct snd_dbuf *bs = rdch->bufsoft;
  826: 
  827: 				CHN_LOCK(rdch);
  828: 				a->bytes = sndbuf_getready(bs);
  829: 	        		a->fragments = a->bytes / sndbuf_getblksz(bs);
  830: 	        		a->fragstotal = sndbuf_getblkcnt(bs);
  831: 	        		a->fragsize = sndbuf_getblksz(bs);
  832: 				CHN_UNLOCK(rdch);
  833: 	    		}
  834: 		}
  835: 		break;
  836: 
  837:     	case SNDCTL_DSP_GETOSPACE:
  838: 		/* return space available in the output queue */
  839: 		{
  840: 	    		audio_buf_info *a = (audio_buf_info *)arg;
  841: 	    		if (wrch) {
  842: 	        		struct snd_dbuf *bs = wrch->bufsoft;
  843: 
  844: 				CHN_LOCK(wrch);
  845: 				chn_wrupdate(wrch);
  846: 				a->bytes = sndbuf_getfree(bs);
  847: 	        		a->fragments = a->bytes / sndbuf_getblksz(bs);
  848: 	        		a->fragstotal = sndbuf_getblkcnt(bs);
  849: 	        		a->fragsize = sndbuf_getblksz(bs);
  850: 				CHN_UNLOCK(wrch);
  851: 	    		}
  852: 		}
  853: 		break;
  854: 
  855:     	case SNDCTL_DSP_GETIPTR:
  856: 		{
  857: 	    		count_info *a = (count_info *)arg;
  858: 	    		if (rdch) {
  859: 	        		struct snd_dbuf *bs = rdch->bufsoft;
  860: 
  861: 				CHN_LOCK(rdch);
  862: 				chn_rdupdate(rdch);
  863: 	        		a->bytes = sndbuf_gettotal(bs);
  864: 	        		a->blocks = sndbuf_getblocks(bs) - rdch->blocks;
  865: 	        		a->ptr = sndbuf_getreadyptr(bs);
  866: 				rdch->blocks = sndbuf_getblocks(bs);
  867: 				CHN_UNLOCK(rdch);
  868: 	    		} else
  869: 				ret = EINVAL;
  870: 		}
  871: 		break;
  872: 
  873:     	case SNDCTL_DSP_GETOPTR:
  874: 		{
  875: 	    		count_info *a = (count_info *)arg;
  876: 	    		if (wrch) {
  877: 	        		struct snd_dbuf *bs = wrch->bufsoft;
  878: 
  879: 				CHN_LOCK(wrch);
  880: 				chn_wrupdate(wrch);
  881: 	        		a->bytes = sndbuf_gettotal(bs);
  882: 	        		a->blocks = sndbuf_getblocks(bs) - wrch->blocks;
  883: 	        		a->ptr = sndbuf_getreadyptr(bs);
  884: 				wrch->blocks = sndbuf_getblocks(bs);
  885: 				CHN_UNLOCK(wrch);
  886: 	    		} else
  887: 				ret = EINVAL;
  888: 		}
  889: 		break;
  890: 
  891:     	case SNDCTL_DSP_GETCAPS:
  892: 		*arg_i = DSP_CAP_REALTIME | DSP_CAP_MMAP | DSP_CAP_TRIGGER;
  893: 		if (rdch && wrch && !(dsp_get_flags(i_dev) & SD_F_SIMPLEX))
  894: 			*arg_i |= DSP_CAP_DUPLEX;
  895: 		break;
  896: 
  897:     	case SOUND_PCM_READ_BITS:
  898:         	*arg_i = ((wrch? wrch->format : rdch->format) & AFMT_16BIT)? 16 : 8;
  899: 		break;
  900: 
  901:     	case SNDCTL_DSP_SETTRIGGER:
  902: 		if (rdch) {
  903: 			CHN_LOCK(rdch);
  904: 			rdch->flags &= ~(CHN_F_TRIGGERED | CHN_F_NOTRIGGER);
  905: 		    	if (*arg_i & PCM_ENABLE_INPUT)
  906: 				chn_start(rdch, 1);
  907: 			else
  908: 				rdch->flags |= CHN_F_NOTRIGGER;
  909: 			CHN_UNLOCK(rdch);
  910: 		}
  911: 		if (wrch) {
  912: 			CHN_LOCK(wrch);
  913: 			wrch->flags &= ~(CHN_F_TRIGGERED | CHN_F_NOTRIGGER);
  914: 		    	if (*arg_i & PCM_ENABLE_OUTPUT)
  915: 				chn_start(wrch, 1);
  916: 			else
  917: 				wrch->flags |= CHN_F_NOTRIGGER;
  918: 		 	CHN_UNLOCK(wrch);
  919: 		}
  920: 		break;
  921: 
  922:     	case SNDCTL_DSP_GETTRIGGER:
  923: 		*arg_i = 0;
  924: 		if (wrch && wrch->flags & CHN_F_TRIGGERED)
  925: 			*arg_i |= PCM_ENABLE_OUTPUT;
  926: 		if (rdch && rdch->flags & CHN_F_TRIGGERED)
  927: 			*arg_i |= PCM_ENABLE_INPUT;
  928: 		break;
  929: 
  930: 	case SNDCTL_DSP_GETODELAY:
  931: 		if (wrch) {
  932: 			struct snd_dbuf *b = wrch->bufhard;
  933: 	        	struct snd_dbuf *bs = wrch->bufsoft;
  934: 
  935: 			CHN_LOCK(wrch);
  936: 			chn_wrupdate(wrch);
  937: 			*arg_i = sndbuf_getready(b) + sndbuf_getready(bs);
  938: 			CHN_UNLOCK(wrch);
  939: 		} else
  940: 			ret = EINVAL;
  941: 		break;
  942: 
  943:     	case SNDCTL_DSP_POST:
  944: 		if (wrch) {
  945: 			CHN_LOCK(wrch);
  946: 			wrch->flags &= ~CHN_F_NOTRIGGER;
  947: 			chn_start(wrch, 1);
  948: 			CHN_UNLOCK(wrch);
  949: 		}
  950: 		break;
  951: 
  952:     	case SNDCTL_DSP_MAPINBUF:
  953:     	case SNDCTL_DSP_MAPOUTBUF:
  954:     	case SNDCTL_DSP_SETSYNCRO:
  955: 		/* undocumented */
  956: 
  957:     	case SNDCTL_DSP_SUBDIVIDE:
  958:     	case SOUND_PCM_WRITE_FILTER:
  959:     	case SOUND_PCM_READ_FILTER:
  960: 		/* dunno what these do, don't sound important */
  961:     	default:
  962: 		DEB(printf("default ioctl fn 0x%08lx fail\n", cmd));
  963: 		ret = EINVAL;
  964: 		break;
  965:     	}
  966: 	relchns(i_dev, rdch, wrch, 0);
  967: 	splx(s);
  968:     	return ret;
  969: }
  970: 
  971: static int
  972: dsp_poll(dev_t i_dev, int events, struct thread *td)
  973: {
  974: 	struct pcm_channel *wrch = NULL, *rdch = NULL;
  975: 	intrmask_t s;
  976: 	int ret, e;
  977: 
  978: 	s = spltty();
  979: 	ret = 0;
  980: 	getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
  981: 
  982: 	if (wrch) {
  983: 		e = (events & (POLLOUT | POLLWRNORM));
  984: 		if (e)
  985: 			ret |= chn_poll(wrch, e, td->td_proc);
  986: 	}
  987: 	if (rdch) {
  988: 		e = (events & (POLLIN | POLLRDNORM));
  989: 		if (e)
  990: 			ret |= chn_poll(rdch, e, td->td_proc);
  991: 	}
  992: 	relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
  993: 
  994: 	splx(s);
  995: 	return ret;
  996: }
  997: 
  998: static int
  999: dsp_mmap(dev_t i_dev, vm_offset_t offset, int nprot)
 1000: {
 1001: 	struct pcm_channel *wrch = NULL, *rdch = NULL, *c;
 1002: 	intrmask_t s;
 1003: 	int ret;
 1004: 
 1005: 	if (nprot & PROT_EXEC)
 1006: 		return -1;
 1007: 
 1008: 	s = spltty();
 1009: 	getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
 1010: #if 0
 1011: 	/*
 1012: 	 * XXX the linux api uses the nprot to select read/write buffer
 1013: 	 * our vm system doesn't allow this, so force write buffer
 1014: 	 */
 1015: 
 1016: 	if (wrch && (nprot & PROT_WRITE)) {
 1017: 		c = wrch;
 1018: 	} else if (rdch && (nprot & PROT_READ)) {
 1019: 		c = rdch;
 1020: 	} else {
 1021: 		splx(s);
 1022: 		return -1;
 1023: 	}
 1024: #else
 1025: 	c = wrch;
 1026: #endif
 1027: 
 1028: 	if (c == NULL) {
 1029: 		relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
 1030: 		splx(s);
 1031: 		return -1;
 1032: 	}
 1033: 
 1034: 	if (offset >= sndbuf_getsize(c->bufsoft)) {
 1035: 		relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
 1036: 		splx(s);
 1037: 		return -1;
 1038: 	}
 1039: 
 1040: 	if (!(c->flags & CHN_F_MAPPED))
 1041: 		c->flags |= CHN_F_MAPPED;
 1042: 
 1043: 	ret = atop(vtophys(sndbuf_getbufofs(c->bufsoft, offset)));
 1044: 	relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
 1045: 
 1046: 	splx(s);
 1047: 	return ret;
 1048: }
 1049: 
 1050: int
 1051: dsp_register(int unit, int channel)
 1052: {
 1053: 	cdevsw_add(&dsp_cdevsw, PCMMKMINOR(-1, 0, 0), PCMMKMINOR(unit, 0, 0));
 1054: 	make_dev(&dsp_cdevsw, PCMMKMINOR(unit, SND_DEV_DSP, channel),
 1055: 		 UID_ROOT, GID_WHEEL, 0666, "dsp%d.%d", unit, channel);
 1056: 	make_dev(&dsp_cdevsw, PCMMKMINOR(unit, SND_DEV_DSP16, channel),
 1057: 		 UID_ROOT, GID_WHEEL, 0666, "dspW%d.%d", unit, channel);
 1058: 	make_dev(&dsp_cdevsw, PCMMKMINOR(unit, SND_DEV_AUDIO, channel),
 1059: 		 UID_ROOT, GID_WHEEL, 0666, "audio%d.%d", unit, channel);
 1060: 
 1061: 	return 0;
 1062: }
 1063: 
 1064: int
 1065: dsp_registerrec(int unit, int channel)
 1066: {
 1067: 	make_dev(&dsp_cdevsw, PCMMKMINOR(unit, SND_DEV_DSPREC, channel),
 1068: 		 UID_ROOT, GID_WHEEL, 0666, "dspr%d.%d", unit, channel);
 1069: 
 1070: 	return 0;
 1071: }
 1072: 
 1073: int
 1074: dsp_unregister(int unit, int channel)
 1075: {
 1076: 	cdevsw_remove(&dsp_cdevsw,
 1077: 			PCMMKMINOR(-1, 0, 0), PCMMKMINOR(unit, 0, 0));
 1078: 	return 0;
 1079: }
 1080: 
 1081: int
 1082: dsp_unregisterrec(int unit, int channel)
 1083: {
 1084: 	return 0;
 1085: }
 1086: 
 1087: #ifdef USING_DEVFS
 1088: static void
 1089: dsp_clone(void *arg, char *name, int namelen, dev_t *dev)
 1090: {
 1091: 	dev_t pdev;
 1092: 	int i, cont, unit, devtype;
 1093: 	int devtypes[3] = {SND_DEV_DSP, SND_DEV_DSP16, SND_DEV_AUDIO};
 1094: 	char *devnames[3] = {"dsp", "dspW", "audio"};
 1095: 
 1096: 	if (*dev != NODEV)
 1097: 		return;
 1098: 	if (pcm_devclass == NULL)
 1099: 		return;
 1100: 
 1101: 	devtype = 0;
 1102: 	unit = -1;
 1103: 	for (i = 0; (i < 3) && (unit == -1); i++) {
 1104: 		devtype = devtypes[i];
 1105: 		if (strcmp(name, devnames[i]) == 0) {
 1106: 			unit = snd_unit;
 1107: 		} else {
 1108: 			if (dev_stdclone(name, NULL, devnames[i], &unit) != 1)
 1109: 				unit = -1;
 1110: 		}
 1111: 	}
 1112: 	if (unit == -1 || unit >= devclass_get_maxunit(pcm_devclass))
 1113: 		return;
 1114: 
 1115: 	cont = 1;
 1116: 	for (i = 0; cont; i++) {
 1117: 		pdev = make_adhoc_dev(&dsp_cdevsw, PCMMKMINOR(unit, devtype, i));
 1118: 		if (pdev->si_flags & SI_NAMED) {
 1119: 			if ((pdev->si_drv1 == NULL) && (pdev->si_drv2 == NULL)) {
 1120: 				*dev = pdev;
 1121: 				return;
 1122: 			}
 1123: 		} else {
 1124: 			cont = 0;
 1125: 		}
 1126: 	}
 1127: }
 1128: 
 1129: static void
 1130: dsp_sysinit(void *p)
 1131: {
 1132: 	dsp_ehtag = EVENTHANDLER_REGISTER(dev_clone, dsp_clone, 0, 1000);
 1133: }
 1134: 
 1135: static void
 1136: dsp_sysuninit(void *p)
 1137: {
 1138: 	if (dsp_ehtag != NULL)
 1139: 		EVENTHANDLER_DEREGISTER(dev_clone, dsp_ehtag);
 1140: }
 1141: 
 1142: SYSINIT(dsp_sysinit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysinit, NULL);
 1143: SYSUNINIT(dsp_sysuninit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysuninit, NULL);
 1144: #endif
 1145: 
 1146: