1cefd51ecSDoug Rabson.\" -*- nroff -*- 2cefd51ecSDoug Rabson.\" 3cefd51ecSDoug Rabson.\" Copyright (c) 1998 Doug Rabson 4cefd51ecSDoug Rabson.\" 5cefd51ecSDoug Rabson.\" All rights reserved. 6cefd51ecSDoug Rabson.\" 7cefd51ecSDoug Rabson.\" This program is free software. 8cefd51ecSDoug Rabson.\" 9cefd51ecSDoug Rabson.\" Redistribution and use in source and binary forms, with or without 10cefd51ecSDoug Rabson.\" modification, are permitted provided that the following conditions 11cefd51ecSDoug Rabson.\" are met: 12cefd51ecSDoug Rabson.\" 1. Redistributions of source code must retain the above copyright 13cefd51ecSDoug Rabson.\" notice, this list of conditions and the following disclaimer. 14cefd51ecSDoug Rabson.\" 2. Redistributions in binary form must reproduce the above copyright 15cefd51ecSDoug Rabson.\" notice, this list of conditions and the following disclaimer in the 16cefd51ecSDoug Rabson.\" documentation and/or other materials provided with the distribution. 17cefd51ecSDoug Rabson.\" 18cefd51ecSDoug Rabson.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR 19cefd51ecSDoug Rabson.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20cefd51ecSDoug Rabson.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21cefd51ecSDoug Rabson.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT, 22cefd51ecSDoug Rabson.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23cefd51ecSDoug Rabson.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24cefd51ecSDoug Rabson.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25cefd51ecSDoug Rabson.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26cefd51ecSDoug Rabson.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27cefd51ecSDoug Rabson.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28cefd51ecSDoug Rabson.\" 297f3dea24SPeter Wemm.\" $FreeBSD$ 30cefd51ecSDoug Rabson.\" 31cefd51ecSDoug Rabson.Dd June 16, 1998 32def37e7cSMike Pritchard.Dt DEVCLASS 9 333d45e180SRuslan Ermilov.Os 34cefd51ecSDoug Rabson.Sh NAME 35cefd51ecSDoug Rabson.Nm devclass 36cefd51ecSDoug Rabson.Nd object representing a class of devices 37a04dd748SMike Pritchard.Sh SYNOPSIS 38d0353b83SRuslan Ermilov.Vt typedef struct devclass *devclass_t ; 39cefd51ecSDoug Rabson.Sh DESCRIPTION 40cefd51ecSDoug RabsonThe 41f8801468SRuslan Ermilov.Vt devclass 42a0942a60SHiten Pandyaobject has two main functions in the system. 43a0942a60SHiten PandyaThe first is to manage 44cefd51ecSDoug Rabsonthe allocation of unit numbers for device instances and the second is 45cefd51ecSDoug Rabsonto hold the list of device drivers for a particular bus type. 46cefd51ecSDoug RabsonEach 47f8801468SRuslan Ermilov.Vt devclass 48cefd51ecSDoug Rabsonhas a name and there cannot be two devclasses with the same name. 49cefd51ecSDoug RabsonThis ensures that unique unit numbers are allocated to device 50cefd51ecSDoug Rabsoninstances. 5123209510SDaniel C. Sobral.Pp 5223209510SDaniel C. SobralBeware that this means 53f8801468SRuslan Ermilov.Vt devclass 5423209510SDaniel C. Sobralmust be the same for different bus attachments of the same device driver. 55cefd51ecSDoug Rabson.Sh SEE ALSO 56cefd51ecSDoug Rabson.Xr devclass_add_driver 9 , 57cefd51ecSDoug Rabson.Xr devclass_delete_driver 9 , 58def37e7cSMike Pritchard.Xr devclass_find 9 , 59cefd51ecSDoug Rabson.Xr devclass_find_driver 9 , 60cefd51ecSDoug Rabson.Xr devclass_get_device 9 , 61cefd51ecSDoug Rabson.Xr devclass_get_devices 9 , 62def37e7cSMike Pritchard.Xr devclass_get_maxunit 9 , 63def37e7cSMike Pritchard.Xr devclass_get_name 9 , 64def37e7cSMike Pritchard.Xr devclass_get_softc 9 , 65def37e7cSMike Pritchard.Xr device 9 , 66def37e7cSMike Pritchard.Xr driver 9 67cefd51ecSDoug Rabson.Sh AUTHORS 68cefd51ecSDoug RabsonThis man page was written by 69cefd51ecSDoug Rabson.An Doug Rabson . 70