Current Path : /sys/amd64/compile/hs32/modules/usr/src/sys/modules/usb/urio/@/amd64/compile/hs32/modules/usr/src/sys/modules/usb/uss820dci/@/dev/sound/pcm/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
Current File : //sys/amd64/compile/hs32/modules/usr/src/sys/modules/usb/urio/@/amd64/compile/hs32/modules/usr/src/sys/modules/usb/uss820dci/@/dev/sound/pcm/sndstat.c |
/*- * Copyright (c) 2005-2009 Ariff Abdullah <ariff@FreeBSD.org> * 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. */ #ifdef HAVE_KERNEL_OPTION_HEADERS #include "opt_snd.h" #endif #include <dev/sound/pcm/sound.h> #include <dev/sound/pcm/pcm.h> #include <dev/sound/version.h> #include <sys/sx.h> SND_DECLARE_FILE("$FreeBSD: release/9.1.0/sys/dev/sound/pcm/sndstat.c 235157 2012-05-09 08:18:22Z pho $"); #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 cdevsw sndstat_cdevsw = { .d_version = D_VERSION, .d_open = sndstat_open, .d_close = sndstat_close, .d_read = sndstat_read, .d_name = "sndstat", .d_flags = D_TRACKCLOSE, }; struct sndstat_entry { SLIST_ENTRY(sndstat_entry) link; device_t dev; char *str; sndstat_handler handler; int type, unit; }; static struct sx sndstat_lock; static struct sbuf sndstat_sbuf; static struct cdev *sndstat_dev = NULL; static int sndstat_bufptr = -1; static int sndstat_maxunit = -1; static int sndstat_files = 0; #define SNDSTAT_PID(x) ((pid_t)((intptr_t)((x)->si_drv1))) #define SNDSTAT_PID_SET(x, y) (x)->si_drv1 = (void *)((intptr_t)(y)) #define SNDSTAT_FLUSH() do { \ if (sndstat_bufptr != -1) { \ sbuf_delete(&sndstat_sbuf); \ sndstat_bufptr = -1; \ } \ } while (0) static SLIST_HEAD(, sndstat_entry) sndstat_devlist = SLIST_HEAD_INITIALIZER(sndstat_devlist); int snd_verbose = 0; TUNABLE_INT("hw.snd.verbose", &snd_verbose); #ifdef SND_DEBUG static int sysctl_hw_snd_sndstat_pid(SYSCTL_HANDLER_ARGS) { int err, val; if (sndstat_dev == NULL) return (EINVAL); sx_xlock(&sndstat_lock); val = (int)SNDSTAT_PID(sndstat_dev); err = sysctl_handle_int(oidp, &val, 0, req); if (err == 0 && req->newptr != NULL && val == 0) { SNDSTAT_FLUSH(); SNDSTAT_PID_SET(sndstat_dev, 0); } sx_unlock(&sndstat_lock); return (err); } SYSCTL_PROC(_hw_snd, OID_AUTO, sndstat_pid, CTLTYPE_INT | CTLFLAG_RW, 0, sizeof(int), sysctl_hw_snd_sndstat_pid, "I", "sndstat busy pid"); #endif static int sndstat_prepare(struct sbuf *s); static int sysctl_hw_sndverbose(SYSCTL_HANDLER_ARGS) { int error, verbose; verbose = snd_verbose; error = sysctl_handle_int(oidp, &verbose, 0, req); if (error == 0 && req->newptr != NULL) { if (verbose < 0 || verbose > 4) error = EINVAL; else snd_verbose = verbose; } return error; } SYSCTL_PROC(_hw_snd, OID_AUTO, verbose, CTLTYPE_INT | CTLFLAG_RW, 0, sizeof(int), sysctl_hw_sndverbose, "I", "verbosity level"); static int sndstat_open(struct cdev *i_dev, int flags, int mode, struct thread *td) { if (sndstat_dev == NULL || i_dev != sndstat_dev) return EBADF; sx_xlock(&sndstat_lock); if (SNDSTAT_PID(i_dev) != 0) { sx_unlock(&sndstat_lock); return EBUSY; } SNDSTAT_PID_SET(i_dev, td->td_proc->p_pid); if (sbuf_new(&sndstat_sbuf, NULL, 4096, SBUF_AUTOEXTEND) == NULL) { SNDSTAT_PID_SET(i_dev, 0); sx_unlock(&sndstat_lock); return ENXIO; } sndstat_bufptr = 0; sx_unlock(&sndstat_lock); return 0; } static int sndstat_close(struct cdev *i_dev, int flags, int mode, struct thread *td) { if (sndstat_dev == NULL || i_dev != sndstat_dev) return EBADF; sx_xlock(&sndstat_lock); if (SNDSTAT_PID(i_dev) == 0) { sx_unlock(&sndstat_lock); return EBADF; } SNDSTAT_FLUSH(); SNDSTAT_PID_SET(i_dev, 0); sx_unlock(&sndstat_lock); return 0; } static int sndstat_read(struct cdev *i_dev, struct uio *buf, int flag) { int l, err; if (sndstat_dev == NULL || i_dev != sndstat_dev) return EBADF; sx_xlock(&sndstat_lock); if (SNDSTAT_PID(i_dev) != buf->uio_td->td_proc->p_pid || sndstat_bufptr == -1) { sx_unlock(&sndstat_lock); return EBADF; } if (sndstat_bufptr == 0) { err = (sndstat_prepare(&sndstat_sbuf) > 0) ? 0 : ENOMEM; if (err) { SNDSTAT_FLUSH(); sx_unlock(&sndstat_lock); return err; } } 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; sx_unlock(&sndstat_lock); 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(struct thread *td) { if (sndstat_dev == NULL) return EBADF; sx_xlock(&sndstat_lock); if (SNDSTAT_PID(sndstat_dev) != 0) { sx_unlock(&sndstat_lock); return EBUSY; } SNDSTAT_PID_SET(sndstat_dev, td->td_proc->p_pid); sx_unlock(&sndstat_lock); return 0; } int sndstat_release(struct thread *td) { if (sndstat_dev == NULL) return EBADF; sx_xlock(&sndstat_lock); if (SNDSTAT_PID(sndstat_dev) != td->td_proc->p_pid) { sx_unlock(&sndstat_lock); return EBADF; } SNDSTAT_PID_SET(sndstat_dev, 0); sx_unlock(&sndstat_lock); 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 = malloc(sizeof *ent, M_DEVBUF, M_WAITOK | M_ZERO); ent->dev = dev; ent->str = str; ent->type = type; ent->unit = unit; ent->handler = handler; sx_xlock(&sndstat_lock); SLIST_INSERT_HEAD(&sndstat_devlist, ent, link); if (type == SS_TYPE_MODULE) sndstat_files++; sndstat_maxunit = (unit > sndstat_maxunit)? unit : sndstat_maxunit; sx_unlock(&sndstat_lock); return 0; } int sndstat_registerfile(char *str) { return sndstat_register(NULL, str, NULL); } int sndstat_unregister(device_t dev) { struct sndstat_entry *ent; sx_xlock(&sndstat_lock); SLIST_FOREACH(ent, &sndstat_devlist, link) { if (ent->dev == dev) { SLIST_REMOVE(&sndstat_devlist, ent, sndstat_entry, link); sx_unlock(&sndstat_lock); free(ent, M_DEVBUF); return 0; } } sx_unlock(&sndstat_lock); return ENXIO; } int sndstat_unregisterfile(char *str) { struct sndstat_entry *ent; sx_xlock(&sndstat_lock); SLIST_FOREACH(ent, &sndstat_devlist, link) { if (ent->dev == NULL && ent->str == str) { SLIST_REMOVE(&sndstat_devlist, ent, sndstat_entry, link); sndstat_files--; sx_unlock(&sndstat_lock); free(ent, M_DEVBUF); return 0; } } sx_unlock(&sndstat_lock); return ENXIO; } /************************************************************************/ static int sndstat_prepare(struct sbuf *s) { struct sndstat_entry *ent; struct snddev_info *d; int i, j; sbuf_printf(s, "FreeBSD Audio Driver (newpcm: %ubit %d/%s)\n", (u_int)sizeof(intpcm32_t) << 3, SND_DRV_VERSION, MACHINE_ARCH); 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; d = device_get_softc(ent->dev); if (!PCM_REGISTERED(d)) continue; /* XXX Need Giant magic entry ??? */ PCM_ACQUIRE_QUICK(d); sbuf_printf(s, "%s:", device_get_nameunit(ent->dev)); sbuf_printf(s, " <%s>", device_get_desc(ent->dev)); if (snd_verbose > 0) sbuf_printf(s, " %s", ent->str); if (ent->handler) ent->handler(s, ent->dev, snd_verbose); sbuf_printf(s, "\n"); PCM_RELEASE_QUICK(d); } } if (snd_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) { if (sndstat_dev != NULL) return EINVAL; sx_init(&sndstat_lock, "sndstat lock"); sndstat_dev = make_dev(&sndstat_cdevsw, SND_DEV_STATUS, UID_ROOT, GID_WHEEL, 0444, "sndstat"); return 0; } static int sndstat_uninit(void) { if (sndstat_dev == NULL) return EINVAL; sx_xlock(&sndstat_lock); if (SNDSTAT_PID(sndstat_dev) != curthread->td_proc->p_pid) { sx_unlock(&sndstat_lock); return EBUSY; } /* XXXPHO: use destroy_dev_sched() */ destroy_dev(sndstat_dev); sndstat_dev = NULL; SNDSTAT_FLUSH(); sx_unlock(&sndstat_lock); sx_destroy(&sndstat_lock); 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);