Add devclass_get_drivers(9) which provides an array of pointers to driver

instances in a given devclass.  This is useful for systems that want to
call code in driver static methods, similar to device_identify().

Reviewed by:	dfr
MFC after:	2 weeks

1 files changed, 57 insertions, 0 deletions

diff --git a/share/man/man9/devclass_get_drivers.9 b/share/man/man9/devclass_get_drivers.9
new file mode 100644
index 0000000..f9561eb
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+++ b/share/man/man9/devclass_get_drivers.9
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+.\" -*- nroff -*-
+.\"
+.\" Copyright (c) 2005 Nate Lawson
+.\"
+.\" 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 April 3, 2005
+.Dt DEVCLASS_GET_DRIVERS 9
+.Os
+.Sh NAME
+.Nm devclass_get_drivers
+.Nd get a list of drivers in a devclass
+.Sh SYNOPSIS
+.In sys/param.h
+.In sys/bus.h
+.Ft int
+.Fn devclass_get_drivers "devclass_t dc" "driver_t ***listp" "int *countp"
+.Sh DESCRIPTION
+Retrieve a list of pointers to all driver instances currently in the
+devclass and return the list in
+.Fa *listp
+and the number of drivers in the list in
+.Fa *countp .
+The memory allocated for the list should be freed using
+.Fn free "*listp" "M_TEMP" .
+.Sh RETURN VALUES
+Zero is returned on success, otherwise an appropriate error is returned.
+.Sh SEE ALSO
+.Xr devclass 9 ,
+.Xr device 9
+.Sh AUTHORS
+This man page was written by
+.An Nate Lawson .