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+.\" -*- nroff -*-
+.\"
+.\" Copyright (c) 1998 Doug Rabson
+.\"
+.\" All rights reserved.
+.\"
+.\" This program is free software.
+.\"
+.\" 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 DEVELOPERS ``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 DEVELOPERS 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.
+.\"
+.\" $FreeBSD$
+.\"
+.Dd August 2, 2005
+.Dt DEVICE_GET_SOFTC 9
+.Os
+.Sh NAME
+.Nm device_get_softc
+.Nd access driver private instance variables
+.Sh SYNOPSIS
+.In sys/param.h
+.In sys/bus.h
+.Ft void *
+.Fn device_get_softc "device_t dev"
+.Sh DESCRIPTION
+Return the driver-specific state of
+.Fa dev .
+The softc is automatically allocated and zeroed when the device is
+attached.
+The softc is also initialized and present when a device is probed,
+but is subject to caveats as described in
+.Xr DEVICE_PROBE 9 .
+The size of the allocation is determined by the device's
+.Vt driver_t
+information used to define the driver.
+The softc typically encapsulates the state of this instance of the
+device.
+.Pp
+Driver writers are discouraged from using their own softc management
+mechanisms.
+Driver writers should not copy such mechanisms found in drivers in the
+tree that predate this function.
+.Sh RETURN VALUES
+The pointer to the driver-specific instance variable is returned.
+.Sh SEE ALSO
+.Xr device 9 ,
+.Xr DEVICE_PROBE 9 ,
+.Xr device_set_softc 9 ,
+.Xr driver 9
+.Sh AUTHORS
+This manual page was written by
+.An Doug Rabson .