3 .\" Copyright (c) 2000 Alexander Langer
5 .\" All rights reserved.
7 .\" This program is free software.
9 .\" Redistribution and use in source and binary forms, with or without
10 .\" modification, are permitted provided that the following conditions
12 .\" 1. Redistributions of source code must retain the above copyright
13 .\" notice, this list of conditions and the following disclaimer.
14 .\" 2. Redistributions in binary form must reproduce the above copyright
15 .\" notice, this list of conditions and the following disclaimer in the
16 .\" documentation and/or other materials provided with the distribution.
18 .\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR
19 .\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 .\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 .\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT,
22 .\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 .\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 .\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 .\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 .Nd kernel driver declaration macro
42 .Fn DRIVER_MODULE name busname "driver_t driver" "devclass_t devclass" "modeventhand_t evh" "void *arg"
43 .Fn MULTI_DRIVER_MODULE name busname "driver_t drivers[]" "devclass_t devclass" "modeventhand_t evh" "void *arg"
47 macro declares a kernel driver.
49 expands to the real driver declaration, where the phrase
51 is used as the naming prefix for the driver and its functions.
52 Note that it is supplied as plain text, and not a
58 is the parent bus of the driver (PCI, ISA, PPBUS and others), e.g.\&
64 The identifier used in
66 can be different from the driver name.
67 Also, the same driver identifier can exist on different busses,
68 which is a pretty clean way of making front ends for different cards
69 using the same driver on the same or different busses.
70 For example, the following is allowed:
72 .Fn DRIVER_MODULE foo isa foo_driver foo_devclass NULL NULL ;
74 .Fn DRIVER_MODULE foo pci foo_driver foo_devclass NULL NULL ;
79 which contains the information about the driver and is therefore one of the
80 two most important parts of the call to
85 argument contains the kernel-internal information about the device,
86 which will be used within the kernel driver module.
90 argument is the event handler which is called when the driver (or module)
91 is loaded or unloaded (see
96 is unused at this time and should be a
100 .Fn MULTI_DRIVER_MODULE
101 is a special version of
103 which takes a list of drivers instead of a single driver instance.
109 This manual page was written by
110 .An Alexander Langer Aq alex@FreeBSD.org .