[dragonfly.git] / sys / dev / sound / pcm / sndstat.c

/*-
 * Copyright (c) 2001 Cameron Grant <cg@freebsd.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $FreeBSD: src/sys/dev/sound/pcm/sndstat.c,v 1.20.2.2 2005/12/30 19:55:54 netchild Exp $
 * $DragonFly: src/sys/dev/sound/pcm/sndstat.c,v 1.13 2008/01/06 16:55:51 swildner Exp $
 */

#include <dev/sound/pcm/sound.h>
#include <dev/sound/pcm/vchan.h>
#ifdef	USING_MUTEX
#include <sys/lock.h>
#endif

SND_DECLARE_FILE("$DragonFly: src/sys/dev/sound/pcm/sndstat.c,v 1.13 2008/01/06 16:55:51 swildner Exp $");

#define	SS_TYPE_MODULE		0
#define	SS_TYPE_FIRST		1
#define	SS_TYPE_PCM		1
#define	SS_TYPE_MIDI		2
#define	SS_TYPE_SEQUENCER	3
#define	SS_TYPE_LAST		3

static d_open_t sndstat_open;
static d_close_t sndstat_close;
static d_read_t sndstat_read;

static struct dev_ops sndstat_cdevsw = {
	{ "sndstat", SND_CDEV_MAJOR, 0 },
	/* .d_flags =	D_NEEDGIANT, */
	.d_open =	sndstat_open,
	.d_close =	sndstat_close,
	.d_read =	sndstat_read,
};

struct sndstat_entry {
	SLIST_ENTRY(sndstat_entry) link;
	device_t dev;
	char *str;
	sndstat_handler handler;
	int type, unit;
};

#ifdef	USING_MUTEX
static struct lock sndstat_lock;
#endif
static struct sbuf sndstat_sbuf;
static int sndstat_isopen = 0;
static int sndstat_bufptr;
static int sndstat_maxunit = -1;
static int sndstat_files = 0;

static SLIST_HEAD(, sndstat_entry) sndstat_devlist = SLIST_HEAD_INITIALIZER(none);

static int sndstat_verbose = 1;
#ifdef	USING_MUTEX
TUNABLE_INT("hw.snd.verbose", &sndstat_verbose);
#else
TUNABLE_INT_DECL("hw.snd.verbose", 1, sndstat_verbose);
#endif

static int sndstat_prepare(struct sbuf *s);

static int
sysctl_hw_sndverbose(SYSCTL_HANDLER_ARGS)
{
	int error, verbose;

	verbose = sndstat_verbose;
	error = sysctl_handle_int(oidp, &verbose, sizeof(verbose), req);
	if (error == 0 && req->newptr != NULL) {
		lockmgr(&sndstat_lock, LK_EXCLUSIVE);
		if (verbose < 0 || verbose > 3)
			error = EINVAL;
		else
			sndstat_verbose = verbose;
		lockmgr(&sndstat_lock, LK_RELEASE);
	}
	return error;
}
SYSCTL_PROC(_hw_snd, OID_AUTO, verbose, CTLTYPE_INT | CTLFLAG_RW,
            0, sizeof(int), sysctl_hw_sndverbose, "I", "");

static int
sndstat_open(struct dev_open_args *ap)
{
	int error;

	lockmgr(&sndstat_lock, LK_EXCLUSIVE);
	if (sndstat_isopen) {
		lockmgr(&sndstat_lock, LK_RELEASE);
		return EBUSY;
	}
	sndstat_isopen = 1;
	lockmgr(&sndstat_lock, LK_RELEASE);
	if (sbuf_new(&sndstat_sbuf, NULL, 4096, 0) == NULL) {
		error = ENXIO;
		goto out;
	}
	sndstat_bufptr = 0;
	error = (sndstat_prepare(&sndstat_sbuf) > 0) ? 0 : ENOMEM;
out:
	if (error) {
		lockmgr(&sndstat_lock, LK_EXCLUSIVE);
		sndstat_isopen = 0;
		lockmgr(&sndstat_lock, LK_RELEASE);
	}
	return (error);
}

static int
sndstat_close(struct dev_close_args *ap)
{
	lockmgr(&sndstat_lock, LK_EXCLUSIVE);
	if (!sndstat_isopen) {
		lockmgr(&sndstat_lock, LK_RELEASE);
		return EBADF;
	}
	sbuf_delete(&sndstat_sbuf);
	sndstat_isopen = 0;

	lockmgr(&sndstat_lock, LK_RELEASE);
	return 0;
}

static int
sndstat_read(struct dev_read_args *ap)
{
	struct uio *buf = ap->a_uio;
	int l, err;

	lockmgr(&sndstat_lock, LK_EXCLUSIVE);
	if (!sndstat_isopen) {
		lockmgr(&sndstat_lock, LK_RELEASE);
		return EBADF;
	}
    	l = min(buf->uio_resid, sbuf_len(&sndstat_sbuf) - sndstat_bufptr);
	err = (l > 0)? uiomove(sbuf_data(&sndstat_sbuf) + sndstat_bufptr, l, buf) : 0;
	sndstat_bufptr += l;

	lockmgr(&sndstat_lock, LK_RELEASE);
	return err;
}

/************************************************************************/

static struct sndstat_entry *
sndstat_find(int type, int unit)
{
	struct sndstat_entry *ent;

	SLIST_FOREACH(ent, &sndstat_devlist, link) {
		if (ent->type == type && ent->unit == unit)
			return ent;
	}

	return NULL;
}

int
sndstat_acquire(void)
{
	lockmgr(&sndstat_lock, LK_EXCLUSIVE);
	if (sndstat_isopen) {
		lockmgr(&sndstat_lock, LK_RELEASE);
		return EBUSY;
	}
	sndstat_isopen = 1;
	lockmgr(&sndstat_lock, LK_RELEASE);
	return 0;
}

int
sndstat_release(void)
{
	lockmgr(&sndstat_lock, LK_EXCLUSIVE);
	if (!sndstat_isopen) {
		lockmgr(&sndstat_lock, LK_RELEASE);
		return EBADF;
	}
	sndstat_isopen = 0;
	lockmgr(&sndstat_lock, LK_RELEASE);
	return 0;
}

int
sndstat_register(device_t dev, char *str, sndstat_handler handler)
{
	struct sndstat_entry *ent;
	const char *devtype;
	int type, unit;

	if (dev) {
		unit = device_get_unit(dev);
		devtype = device_get_name(dev);
		if (!strcmp(devtype, "pcm"))
			type = SS_TYPE_PCM;
		else if (!strcmp(devtype, "midi"))
			type = SS_TYPE_MIDI;
		else if (!strcmp(devtype, "sequencer"))
			type = SS_TYPE_SEQUENCER;
		else
			return EINVAL;
	} else {
		type = SS_TYPE_MODULE;
		unit = -1;
	}

	ent = kmalloc(sizeof *ent, M_DEVBUF, M_ZERO | M_WAITOK);

	ent->dev = dev;
	ent->str = str;
	ent->type = type;
	ent->unit = unit;
	ent->handler = handler;

	lockmgr(&sndstat_lock, LK_EXCLUSIVE);
	SLIST_INSERT_HEAD(&sndstat_devlist, ent, link);
	if (type == SS_TYPE_MODULE)
		sndstat_files++;
	sndstat_maxunit = (unit > sndstat_maxunit)? unit : sndstat_maxunit;
	lockmgr(&sndstat_lock, LK_RELEASE);

	return 0;
}

int
sndstat_registerfile(char *str)
{
	return sndstat_register(NULL, str, NULL);
}

int
sndstat_unregister(device_t dev)
{
	struct sndstat_entry *ent;

	lockmgr(&sndstat_lock, LK_EXCLUSIVE);
	SLIST_FOREACH(ent, &sndstat_devlist, link) {
		if (ent->dev == dev) {
			SLIST_REMOVE(&sndstat_devlist, ent, sndstat_entry, link);
			lockmgr(&sndstat_lock, LK_RELEASE);
			kfree(ent, M_DEVBUF);

			return 0;
		}
	}
	lockmgr(&sndstat_lock, LK_RELEASE);

	return ENXIO;
}

int
sndstat_unregisterfile(char *str)
{
	struct sndstat_entry *ent;

	lockmgr(&sndstat_lock, LK_EXCLUSIVE);
	SLIST_FOREACH(ent, &sndstat_devlist, link) {
		if (ent->dev == NULL && ent->str == str) {
			SLIST_REMOVE(&sndstat_devlist, ent, sndstat_entry, link);
			sndstat_files--;
			lockmgr(&sndstat_lock, LK_RELEASE);
			kfree(ent, M_DEVBUF);

			return 0;
		}
	}
	lockmgr(&sndstat_lock, LK_RELEASE);

	return ENXIO;
}

/************************************************************************/

static int
sndstat_prepare(struct sbuf *s)
{
	struct sndstat_entry *ent;
    	int i, j;

	sbuf_printf(s, "FreeBSD Audio Driver (newpcm)\n");
	if (SLIST_EMPTY(&sndstat_devlist)) {
		sbuf_printf(s, "No devices installed.\n");
		sbuf_finish(s);
    		return sbuf_len(s);
	}

	sbuf_printf(s, "Installed devices:\n");

    	for (i = 0; i <= sndstat_maxunit; i++) {
		for (j = SS_TYPE_FIRST; j <= SS_TYPE_LAST; j++) {
			ent = sndstat_find(j, i);
			if (!ent)
				continue;
			sbuf_printf(s, "%s:", device_get_nameunit(ent->dev));
			sbuf_printf(s, " <%s>", device_get_desc(ent->dev));
			sbuf_printf(s, " %s", ent->str);
			if (ent->handler)
				ent->handler(s, ent->dev, sndstat_verbose);
			else
				sbuf_printf(s, " [no handler]");
			sbuf_printf(s, "\n");
		}
    	}

	if (sndstat_verbose >= 3 && sndstat_files > 0) {
		sbuf_printf(s, "\nFile Versions:\n");

		SLIST_FOREACH(ent, &sndstat_devlist, link) {
			if (ent->dev == NULL && ent->str != NULL)
				sbuf_printf(s, "%s\n", ent->str);
		}
	}

	sbuf_finish(s);
    	return sbuf_len(s);
}

static int
sndstat_init(void)
{
	lockinit(&sndstat_lock, "sndstat", 0, 0);
	if (make_dev(&sndstat_cdevsw, SND_DEV_STATUS,
		     UID_ROOT, GID_WHEEL, 0444, "sndstat") == NULL) {
		return ENXIO;
	}
	return 0;
}

static int
sndstat_uninit(void)
{
	lockmgr(&sndstat_lock, LK_EXCLUSIVE);
	if (sndstat_isopen) {
		lockmgr(&sndstat_lock, LK_RELEASE);
		return EBUSY;
	}

	//dev_ops_remove(&sndstat_cdevsw, -1, SND_DEV_STATUS);
	dev_ops_remove_all(&sndstat_cdevsw);
	lockmgr(&sndstat_lock, LK_RELEASE);
	return 0;
}

static void
sndstat_sysinit(void *p)
{
	sndstat_init();
}

static void
sndstat_sysuninit(void *p)
{
	int error;

	error = sndstat_uninit();
	KASSERT(error == 0, ("%s: error = %d", __func__, error));
}

SYSINIT(sndstat_sysinit, SI_SUB_DRIVERS, SI_ORDER_FIRST, sndstat_sysinit, NULL);
SYSUNINIT(sndstat_sysuninit, SI_SUB_DRIVERS, SI_ORDER_FIRST, sndstat_sysuninit, NULL);
Commit	Line	Data
558a398b SS	1	/*-
558a398b SS	2	* Copyright (c) 2001 Cameron Grant <cg@freebsd.org>
984263bc MD	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.
1de703da	25	*
558a398b	26	* $FreeBSD: src/sys/dev/sound/pcm/sndstat.c,v 1.20.2.2 2005/12/30 19:55:54 netchild Exp $
978400d3	27	* $DragonFly: src/sys/dev/sound/pcm/sndstat.c,v 1.13 2008/01/06 16:55:51 swildner Exp $
984263bc MD	28	*/
	29
	30	#include <dev/sound/pcm/sound.h>
	31	#include <dev/sound/pcm/vchan.h>
558a398b SS	32	#ifdef USING_MUTEX
	33	#include <sys/lock.h>
	34	#endif
984263bc	35
978400d3	36	SND_DECLARE_FILE("$DragonFly: src/sys/dev/sound/pcm/sndstat.c,v 1.13 2008/01/06 16:55:51 swildner Exp $");
984263bc MD	37
	38	#define SS_TYPE_MODULE 0
	39	#define SS_TYPE_FIRST 1
	40	#define SS_TYPE_PCM 1
	41	#define SS_TYPE_MIDI 2
	42	#define SS_TYPE_SEQUENCER 3
	43	#define SS_TYPE_LAST 3
	44
	45	static d_open_t sndstat_open;
	46	static d_close_t sndstat_close;
	47	static d_read_t sndstat_read;
	48
558a398b	49	static struct dev_ops sndstat_cdevsw = {
fef8985e	50	{ "sndstat", SND_CDEV_MAJOR, 0 },
558a398b	51	/* .d_flags = D_NEEDGIANT, */
fef8985e MD	52	.d_open = sndstat_open,
	53	.d_close = sndstat_close,
	54	.d_read = sndstat_read,
984263bc MD	55	};
	56
	57	struct sndstat_entry {
	58	SLIST_ENTRY(sndstat_entry) link;
	59	device_t dev;
	60	char *str;
	61	sndstat_handler handler;
	62	int type, unit;
	63	};
	64
558a398b SS	65	#ifdef USING_MUTEX
	66	static struct lock sndstat_lock;
	67	#endif
984263bc	68	static struct sbuf sndstat_sbuf;
984263bc MD	69	static int sndstat_isopen = 0;
	70	static int sndstat_bufptr;
	71	static int sndstat_maxunit = -1;
	72	static int sndstat_files = 0;
	73
	74	static SLIST_HEAD(, sndstat_entry) sndstat_devlist = SLIST_HEAD_INITIALIZER(none);
	75
	76	static int sndstat_verbose = 1;
	77	#ifdef USING_MUTEX
	78	TUNABLE_INT("hw.snd.verbose", &sndstat_verbose);
	79	#else
	80	TUNABLE_INT_DECL("hw.snd.verbose", 1, sndstat_verbose);
	81	#endif
	82
	83	static int sndstat_prepare(struct sbuf *s);
	84
	85	static int
	86	sysctl_hw_sndverbose(SYSCTL_HANDLER_ARGS)
	87	{
984263bc MD	88	int error, verbose;
	89
	90	verbose = sndstat_verbose;
	91	error = sysctl_handle_int(oidp, &verbose, sizeof(verbose), req);
	92	if (error == 0 && req->newptr != NULL) {
558a398b	93	lockmgr(&sndstat_lock, LK_EXCLUSIVE);
984263bc MD	94	if (verbose < 0 \|\| verbose > 3)
	95	error = EINVAL;
	96	else
	97	sndstat_verbose = verbose;
558a398b	98	lockmgr(&sndstat_lock, LK_RELEASE);
984263bc MD	99	}
	100	return error;
	101	}
	102	SYSCTL_PROC(_hw_snd, OID_AUTO, verbose, CTLTYPE_INT \| CTLFLAG_RW,
	103	0, sizeof(int), sysctl_hw_sndverbose, "I", "");
	104
	105	static int
fef8985e	106	sndstat_open(struct dev_open_args *ap)
984263bc	107	{
558a398b	108	int error;
984263bc	109
558a398b	110	lockmgr(&sndstat_lock, LK_EXCLUSIVE);
984263bc	111	if (sndstat_isopen) {
558a398b	112	lockmgr(&sndstat_lock, LK_RELEASE);
984263bc MD	113	return EBUSY;
984263bc MD	114	}
558a398b SS	115	sndstat_isopen = 1;
558a398b SS	116	lockmgr(&sndstat_lock, LK_RELEASE);
984263bc	117	if (sbuf_new(&sndstat_sbuf, NULL, 4096, 0) == NULL) {
558a398b SS	118	error = ENXIO;
558a398b SS	119	goto out;
984263bc MD	120	}
984263bc MD	121	sndstat_bufptr = 0;
558a398b SS	122	error = (sndstat_prepare(&sndstat_sbuf) > 0) ? 0 : ENOMEM;
	123	out:
	124	if (error) {
	125	lockmgr(&sndstat_lock, LK_EXCLUSIVE);
	126	sndstat_isopen = 0;
	127	lockmgr(&sndstat_lock, LK_RELEASE);
	128	}
	129	return (error);
984263bc MD	130	}
	131
	132	static int
fef8985e	133	sndstat_close(struct dev_close_args *ap)
984263bc	134	{
558a398b	135	lockmgr(&sndstat_lock, LK_EXCLUSIVE);
984263bc	136	if (!sndstat_isopen) {
558a398b	137	lockmgr(&sndstat_lock, LK_RELEASE);
984263bc MD	138	return EBADF;
	139	}
	140	sbuf_delete(&sndstat_sbuf);
	141	sndstat_isopen = 0;
	142
558a398b	143	lockmgr(&sndstat_lock, LK_RELEASE);
984263bc MD	144	return 0;
	145	}
	146
	147	static int
fef8985e	148	sndstat_read(struct dev_read_args *ap)
984263bc	149	{
558a398b	150	struct uio *buf = ap->a_uio;
984263bc MD	151	int l, err;
984263bc MD	152
558a398b	153	lockmgr(&sndstat_lock, LK_EXCLUSIVE);
984263bc	154	if (!sndstat_isopen) {
558a398b	155	lockmgr(&sndstat_lock, LK_RELEASE);
984263bc MD	156	return EBADF;
984263bc MD	157	}
558a398b SS	158	l = min(buf->uio_resid, sbuf_len(&sndstat_sbuf) - sndstat_bufptr);
558a398b SS	159	err = (l > 0)? uiomove(sbuf_data(&sndstat_sbuf) + sndstat_bufptr, l, buf) : 0;
984263bc MD	160	sndstat_bufptr += l;
984263bc MD	161
558a398b	162	lockmgr(&sndstat_lock, LK_RELEASE);
984263bc MD	163	return err;
	164	}
	165
	166	/************************************************************************/
	167
	168	static struct sndstat_entry *
	169	sndstat_find(int type, int unit)
	170	{
	171	struct sndstat_entry *ent;
	172
	173	SLIST_FOREACH(ent, &sndstat_devlist, link) {
	174	if (ent->type == type && ent->unit == unit)
	175	return ent;
	176	}
	177
	178	return NULL;
	179	}
	180
	181	int
558a398b SS	182	sndstat_acquire(void)
	183	{
	184	lockmgr(&sndstat_lock, LK_EXCLUSIVE);
	185	if (sndstat_isopen) {
	186	lockmgr(&sndstat_lock, LK_RELEASE);
	187	return EBUSY;
	188	}
	189	sndstat_isopen = 1;
	190	lockmgr(&sndstat_lock, LK_RELEASE);
	191	return 0;
	192	}
	193
	194	int
	195	sndstat_release(void)
	196	{
	197	lockmgr(&sndstat_lock, LK_EXCLUSIVE);
	198	if (!sndstat_isopen) {
	199	lockmgr(&sndstat_lock, LK_RELEASE);
	200	return EBADF;
	201	}
	202	sndstat_isopen = 0;
	203	lockmgr(&sndstat_lock, LK_RELEASE);
	204	return 0;
	205	}
	206
	207	int
984263bc MD	208	sndstat_register(device_t dev, char *str, sndstat_handler handler)
984263bc MD	209	{
984263bc MD	210	struct sndstat_entry *ent;
	211	const char *devtype;
	212	int type, unit;
	213
	214	if (dev) {
	215	unit = device_get_unit(dev);
	216	devtype = device_get_name(dev);
	217	if (!strcmp(devtype, "pcm"))
	218	type = SS_TYPE_PCM;
	219	else if (!strcmp(devtype, "midi"))
	220	type = SS_TYPE_MIDI;
	221	else if (!strcmp(devtype, "sequencer"))
	222	type = SS_TYPE_SEQUENCER;
	223	else
	224	return EINVAL;
	225	} else {
	226	type = SS_TYPE_MODULE;
	227	unit = -1;
	228	}
	229
efda3bd0	230	ent = kmalloc(sizeof *ent, M_DEVBUF, M_ZERO \| M_WAITOK);
984263bc MD	231
	232	ent->dev = dev;
	233	ent->str = str;
	234	ent->type = type;
	235	ent->unit = unit;
	236	ent->handler = handler;
	237
558a398b	238	lockmgr(&sndstat_lock, LK_EXCLUSIVE);
984263bc MD	239	SLIST_INSERT_HEAD(&sndstat_devlist, ent, link);
	240	if (type == SS_TYPE_MODULE)
	241	sndstat_files++;
	242	sndstat_maxunit = (unit > sndstat_maxunit)? unit : sndstat_maxunit;
558a398b	243	lockmgr(&sndstat_lock, LK_RELEASE);
984263bc MD	244
	245	return 0;
	246	}
	247
	248	int
	249	sndstat_registerfile(char *str)
	250	{
	251	return sndstat_register(NULL, str, NULL);
	252	}
	253
	254	int
	255	sndstat_unregister(device_t dev)
	256	{
984263bc MD	257	struct sndstat_entry *ent;
984263bc MD	258
558a398b	259	lockmgr(&sndstat_lock, LK_EXCLUSIVE);
984263bc MD	260	SLIST_FOREACH(ent, &sndstat_devlist, link) {
	261	if (ent->dev == dev) {
	262	SLIST_REMOVE(&sndstat_devlist, ent, sndstat_entry, link);
558a398b	263	lockmgr(&sndstat_lock, LK_RELEASE);
efda3bd0	264	kfree(ent, M_DEVBUF);
984263bc MD	265
	266	return 0;
	267	}
	268	}
558a398b	269	lockmgr(&sndstat_lock, LK_RELEASE);
984263bc MD	270
	271	return ENXIO;
	272	}
	273
	274	int
	275	sndstat_unregisterfile(char *str)
	276	{
984263bc MD	277	struct sndstat_entry *ent;
984263bc MD	278
558a398b	279	lockmgr(&sndstat_lock, LK_EXCLUSIVE);
984263bc MD	280	SLIST_FOREACH(ent, &sndstat_devlist, link) {
	281	if (ent->dev == NULL && ent->str == str) {
	282	SLIST_REMOVE(&sndstat_devlist, ent, sndstat_entry, link);
984263bc	283	sndstat_files--;
558a398b SS	284	lockmgr(&sndstat_lock, LK_RELEASE);
558a398b SS	285	kfree(ent, M_DEVBUF);
984263bc MD	286
	287	return 0;
	288	}
	289	}
558a398b	290	lockmgr(&sndstat_lock, LK_RELEASE);
984263bc MD	291
	292	return ENXIO;
	293	}
	294
	295	/************************************************************************/
	296
	297	static int
	298	sndstat_prepare(struct sbuf *s)
	299	{
	300	struct sndstat_entry *ent;
	301	int i, j;
	302
	303	sbuf_printf(s, "FreeBSD Audio Driver (newpcm)\n");
	304	if (SLIST_EMPTY(&sndstat_devlist)) {
	305	sbuf_printf(s, "No devices installed.\n");
	306	sbuf_finish(s);
	307	return sbuf_len(s);
	308	}
	309
	310	sbuf_printf(s, "Installed devices:\n");
	311
	312	for (i = 0; i <= sndstat_maxunit; i++) {
	313	for (j = SS_TYPE_FIRST; j <= SS_TYPE_LAST; j++) {
	314	ent = sndstat_find(j, i);
	315	if (!ent)
	316	continue;
	317	sbuf_printf(s, "%s:", device_get_nameunit(ent->dev));
	318	sbuf_printf(s, " <%s>", device_get_desc(ent->dev));
	319	sbuf_printf(s, " %s", ent->str);
	320	if (ent->handler)
	321	ent->handler(s, ent->dev, sndstat_verbose);
	322	else
	323	sbuf_printf(s, " [no handler]");
	324	sbuf_printf(s, "\n");
	325	}
	326	}
	327
	328	if (sndstat_verbose >= 3 && sndstat_files > 0) {
	329	sbuf_printf(s, "\nFile Versions:\n");
	330
	331	SLIST_FOREACH(ent, &sndstat_devlist, link) {
	332	if (ent->dev == NULL && ent->str != NULL)
	333	sbuf_printf(s, "%s\n", ent->str);
	334	}
	335	}
	336
	337	sbuf_finish(s);
	338	return sbuf_len(s);
	339	}
	340
	341	static int
	342	sndstat_init(void)
	343	{
558a398b SS	344	lockinit(&sndstat_lock, "sndstat", 0, 0);
558a398b SS	345	if (make_dev(&sndstat_cdevsw, SND_DEV_STATUS,
3e82b46c	346	UID_ROOT, GID_WHEEL, 0444, "sndstat") == NULL) {
558a398b	347	return ENXIO;
3e82b46c	348	}
558a398b	349	return 0;
984263bc MD	350	}
	351
	352	static int
	353	sndstat_uninit(void)
	354	{
558a398b	355	lockmgr(&sndstat_lock, LK_EXCLUSIVE);
984263bc	356	if (sndstat_isopen) {
558a398b	357	lockmgr(&sndstat_lock, LK_RELEASE);
984263bc MD	358	return EBUSY;
984263bc MD	359	}
984263bc	360
cd29885a MD	361	//dev_ops_remove(&sndstat_cdevsw, -1, SND_DEV_STATUS);
cd29885a MD	362	dev_ops_remove_all(&sndstat_cdevsw);
558a398b SS	363	lockmgr(&sndstat_lock, LK_RELEASE);
558a398b SS	364	return 0;
984263bc MD	365	}
	366
	367	static void
	368	sndstat_sysinit(void *p)
	369	{
	370	sndstat_init();
	371	}
	372
	373	static void
	374	sndstat_sysuninit(void *p)
	375	{
558a398b SS	376	int error;
	377
	378	error = sndstat_uninit();
	379	KASSERT(error == 0, ("%s: error = %d", __func__, error));
984263bc MD	380	}
	381
	382	SYSINIT(sndstat_sysinit, SI_SUB_DRIVERS, SI_ORDER_FIRST, sndstat_sysinit, NULL);
	383	SYSUNINIT(sndstat_sysuninit, SI_SUB_DRIVERS, SI_ORDER_FIRST, sndstat_sysuninit, NULL);
	384
	385