2 * Copyright (c) 2001 Cameron Grant <cg@freebsd.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
27 #include <dev/sound/pcm/sound.h>
28 #include <dev/sound/pcm/vchan.h>
33 SND_DECLARE_FILE("$FreeBSD$");
35 #define SS_TYPE_MODULE 0
36 #define SS_TYPE_FIRST 1
38 #define SS_TYPE_MIDI 2
39 #define SS_TYPE_SEQUENCER 3
40 #define SS_TYPE_LAST 3
42 static d_open_t sndstat_open;
43 static d_close_t sndstat_close;
44 static d_read_t sndstat_read;
46 static struct cdevsw sndstat_cdevsw = {
47 .d_version = D_VERSION,
48 .d_flags = D_NEEDGIANT,
49 .d_open = sndstat_open,
50 .d_close = sndstat_close,
51 .d_read = sndstat_read,
55 struct sndstat_entry {
56 SLIST_ENTRY(sndstat_entry) link;
59 sndstat_handler handler;
64 static struct mtx sndstat_lock;
66 static struct sbuf sndstat_sbuf;
67 static struct cdev *sndstat_dev = NULL;
68 static int sndstat_bufptr = -1;
69 static int sndstat_maxunit = -1;
70 static int sndstat_files = 0;
72 #define SNDSTAT_PID(x) ((pid_t)((intptr_t)((x)->si_drv1)))
73 #define SNDSTAT_PID_SET(x, y) (x)->si_drv1 = (void *)((intptr_t)(y))
74 #define SNDSTAT_FLUSH() do { \
75 if (sndstat_bufptr != -1) { \
76 sbuf_delete(&sndstat_sbuf); \
77 sndstat_bufptr = -1; \
81 static SLIST_HEAD(, sndstat_entry) sndstat_devlist = SLIST_HEAD_INITIALIZER(none);
85 TUNABLE_INT("hw.snd.verbose", &snd_verbose);
87 TUNABLE_INT_DECL("hw.snd.verbose", 1, snd_verbose);
92 sysctl_hw_snd_sndstat_pid(SYSCTL_HANDLER_ARGS)
96 if (sndstat_dev == NULL)
99 mtx_lock(&sndstat_lock);
100 val = (int)SNDSTAT_PID(sndstat_dev);
101 mtx_unlock(&sndstat_lock);
102 err = sysctl_handle_int(oidp, &val, 0, req);
103 if (err == 0 && req->newptr != NULL && val == 0) {
104 mtx_lock(&sndstat_lock);
106 SNDSTAT_PID_SET(sndstat_dev, 0);
107 mtx_unlock(&sndstat_lock);
111 SYSCTL_PROC(_hw_snd, OID_AUTO, sndstat_pid, CTLTYPE_INT | CTLFLAG_RW,
112 0, sizeof(int), sysctl_hw_snd_sndstat_pid, "I", "sndstat busy pid");
115 static int sndstat_prepare(struct sbuf *s);
118 sysctl_hw_sndverbose(SYSCTL_HANDLER_ARGS)
122 verbose = snd_verbose;
123 error = sysctl_handle_int(oidp, &verbose, 0, req);
124 if (error == 0 && req->newptr != NULL) {
125 mtx_lock(&sndstat_lock);
126 if (verbose < 0 || verbose > 4)
129 snd_verbose = verbose;
130 mtx_unlock(&sndstat_lock);
134 SYSCTL_PROC(_hw_snd, OID_AUTO, verbose, CTLTYPE_INT | CTLFLAG_RW,
135 0, sizeof(int), sysctl_hw_sndverbose, "I", "verbosity level");
138 sndstat_open(struct cdev *i_dev, int flags, int mode, struct thread *td)
142 if (sndstat_dev == NULL || i_dev != sndstat_dev)
145 mtx_lock(&sndstat_lock);
146 if (SNDSTAT_PID(i_dev) != 0) {
147 mtx_unlock(&sndstat_lock);
150 SNDSTAT_PID_SET(i_dev, td->td_proc->p_pid);
151 mtx_unlock(&sndstat_lock);
152 if (sbuf_new(&sndstat_sbuf, NULL, 4096, SBUF_AUTOEXTEND) == NULL) {
157 error = (sndstat_prepare(&sndstat_sbuf) > 0) ? 0 : ENOMEM;
160 mtx_lock(&sndstat_lock);
162 SNDSTAT_PID_SET(i_dev, 0);
163 mtx_unlock(&sndstat_lock);
169 sndstat_close(struct cdev *i_dev, int flags, int mode, struct thread *td)
171 if (sndstat_dev == NULL || i_dev != sndstat_dev)
174 mtx_lock(&sndstat_lock);
175 if (SNDSTAT_PID(i_dev) == 0) {
176 mtx_unlock(&sndstat_lock);
181 SNDSTAT_PID_SET(i_dev, 0);
183 mtx_unlock(&sndstat_lock);
189 sndstat_read(struct cdev *i_dev, struct uio *buf, int flag)
193 if (sndstat_dev == NULL || i_dev != sndstat_dev)
196 mtx_lock(&sndstat_lock);
197 if (SNDSTAT_PID(i_dev) != buf->uio_td->td_proc->p_pid ||
198 sndstat_bufptr == -1) {
199 mtx_unlock(&sndstat_lock);
202 mtx_unlock(&sndstat_lock);
204 l = min(buf->uio_resid, sbuf_len(&sndstat_sbuf) - sndstat_bufptr);
205 err = (l > 0)? uiomove(sbuf_data(&sndstat_sbuf) + sndstat_bufptr, l, buf) : 0;
211 /************************************************************************/
213 static struct sndstat_entry *
214 sndstat_find(int type, int unit)
216 struct sndstat_entry *ent;
218 SLIST_FOREACH(ent, &sndstat_devlist, link) {
219 if (ent->type == type && ent->unit == unit)
227 sndstat_acquire(struct thread *td)
229 if (sndstat_dev == NULL)
232 mtx_lock(&sndstat_lock);
233 if (SNDSTAT_PID(sndstat_dev) != 0) {
234 mtx_unlock(&sndstat_lock);
237 SNDSTAT_PID_SET(sndstat_dev, td->td_proc->p_pid);
238 mtx_unlock(&sndstat_lock);
243 sndstat_release(struct thread *td)
245 if (sndstat_dev == NULL)
248 mtx_lock(&sndstat_lock);
249 if (SNDSTAT_PID(sndstat_dev) != td->td_proc->p_pid) {
250 mtx_unlock(&sndstat_lock);
253 SNDSTAT_PID_SET(sndstat_dev, 0);
254 mtx_unlock(&sndstat_lock);
259 sndstat_register(device_t dev, char *str, sndstat_handler handler)
261 struct sndstat_entry *ent;
266 unit = device_get_unit(dev);
267 devtype = device_get_name(dev);
268 if (!strcmp(devtype, "pcm"))
270 else if (!strcmp(devtype, "midi"))
272 else if (!strcmp(devtype, "sequencer"))
273 type = SS_TYPE_SEQUENCER;
277 type = SS_TYPE_MODULE;
281 ent = malloc(sizeof *ent, M_DEVBUF, M_WAITOK | M_ZERO);
286 ent->handler = handler;
288 mtx_lock(&sndstat_lock);
289 SLIST_INSERT_HEAD(&sndstat_devlist, ent, link);
290 if (type == SS_TYPE_MODULE)
292 sndstat_maxunit = (unit > sndstat_maxunit)? unit : sndstat_maxunit;
293 mtx_unlock(&sndstat_lock);
299 sndstat_registerfile(char *str)
301 return sndstat_register(NULL, str, NULL);
305 sndstat_unregister(device_t dev)
307 struct sndstat_entry *ent;
309 mtx_lock(&sndstat_lock);
310 SLIST_FOREACH(ent, &sndstat_devlist, link) {
311 if (ent->dev == dev) {
312 SLIST_REMOVE(&sndstat_devlist, ent, sndstat_entry, link);
313 mtx_unlock(&sndstat_lock);
319 mtx_unlock(&sndstat_lock);
325 sndstat_unregisterfile(char *str)
327 struct sndstat_entry *ent;
329 mtx_lock(&sndstat_lock);
330 SLIST_FOREACH(ent, &sndstat_devlist, link) {
331 if (ent->dev == NULL && ent->str == str) {
332 SLIST_REMOVE(&sndstat_devlist, ent, sndstat_entry, link);
334 mtx_unlock(&sndstat_lock);
340 mtx_unlock(&sndstat_lock);
345 /************************************************************************/
348 sndstat_prepare(struct sbuf *s)
350 struct sndstat_entry *ent;
353 sbuf_printf(s, "FreeBSD Audio Driver (newpcm: %ubit)\n",
354 (unsigned int)sizeof(intpcm_t) << 3);
355 if (SLIST_EMPTY(&sndstat_devlist)) {
356 sbuf_printf(s, "No devices installed.\n");
361 sbuf_printf(s, "Installed devices:\n");
363 for (i = 0; i <= sndstat_maxunit; i++) {
364 for (j = SS_TYPE_FIRST; j <= SS_TYPE_LAST; j++) {
365 ent = sndstat_find(j, i);
368 sbuf_printf(s, "%s:", device_get_nameunit(ent->dev));
369 sbuf_printf(s, " <%s>", device_get_desc(ent->dev));
370 sbuf_printf(s, " %s", ent->str);
372 ent->handler(s, ent->dev, snd_verbose);
374 sbuf_printf(s, " [no handler]");
375 sbuf_printf(s, "\n");
379 if (snd_verbose >= 3 && sndstat_files > 0) {
380 sbuf_printf(s, "\nFile Versions:\n");
382 SLIST_FOREACH(ent, &sndstat_devlist, link) {
383 if (ent->dev == NULL && ent->str != NULL)
384 sbuf_printf(s, "%s\n", ent->str);
395 if (sndstat_dev != NULL)
397 mtx_init(&sndstat_lock, "sndstat", "sndstat lock", MTX_DEF);
398 sndstat_dev = make_dev(&sndstat_cdevsw, SND_DEV_STATUS,
399 UID_ROOT, GID_WHEEL, 0444, "sndstat");
406 if (sndstat_dev == NULL)
409 mtx_lock(&sndstat_lock);
410 if (SNDSTAT_PID(sndstat_dev) != curthread->td_proc->p_pid) {
411 mtx_unlock(&sndstat_lock);
417 mtx_unlock(&sndstat_lock);
419 destroy_dev(sndstat_dev);
422 mtx_destroy(&sndstat_lock);
427 sndstat_sysinit(void *p)
433 sndstat_sysuninit(void *p)
437 error = sndstat_uninit();
438 KASSERT(error == 0, ("%s: error = %d", __func__, error));
441 SYSINIT(sndstat_sysinit, SI_SUB_DRIVERS, SI_ORDER_FIRST, sndstat_sysinit, NULL);
442 SYSUNINIT(sndstat_sysuninit, SI_SUB_DRIVERS, SI_ORDER_FIRST, sndstat_sysuninit, NULL);