1.\" 2.\" Copyright (c) 1998, 2000 3.\" Justin T. Gibbs. All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright 9.\" notice, this list of conditions and the following disclaimer. 10.\" 2. The name of the author may not be used to endorse or promote products 11.\" derived from this software without specific prior written permission. 12.\" 13.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 14.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 15.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 16.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 17.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 18.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 19.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 20.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 21.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 22.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 23.\" 24.\" $FreeBSD: src/share/man/man4/adw.4,v 1.5.4.6 2001/10/01 13:07:22 dd Exp $ 25.\" $DragonFly: src/share/man/man4/adw.4,v 1.2 2003/06/17 04:36:58 dillon Exp $ 26.\" 27.Dd February 13, 2000 28.Dt ADW 4 29.Os 30.Sh NAME 31.Nm adw 32.Nd Advansys PCI 16bit SCSI Host adapter driver 33.Sh SYNOPSIS 34.Cd controller pci 35.Cd controller adw 36.Pp 37For one or more SCSI busses: 38.Cd controller scbus0 at adw0 39.Sh DESCRIPTION 40This driver provides access to the 16bit 41.Tn SCSI 42bus connected to the Advanced Systems Products, Inc. 43.Tn ASC3550 Ultra , 44and 45.Tn ASC38C0800 Ultra2 , 46SCSI Host Adapter chips. 47AdvanSys products incorporating these chips include the 48.Tn ABP[3]940UW , 49.Tn ABP950UW , 50.Tn ABP970UW , 51.Tn ABP3940U2W , 52and 53.Tn ABP3950U2W . 54Both chips support, synchronous transfers 55(20MHz and 40MHz max respectively), 5616bit transfers, tagged queueing, 57and up to 253 concurrent SCSI transactions. 58.Pp 59Per target configuration performed in the 60.Tn AdvanceWare 61menu, which is accessible at boot, 62is honored by this driver. 63This includes synchronous/asynchronous transfers, 64maximum synchronous negotiation rate, wide transfers, disconnection, 65tagged queueing, and the host adapter's SCSI ID. 66The global setting for the maximum number of tagged transactions allowed 67per target is not honored as the CAM SCSI system will automatically determine 68the maximum number of tags a device can receive as well as guarantee fair 69resource allocation among devices. 70.Sh SEE ALSO 71.Xr adv 4 , 72.Xr cd 4 , 73.Xr da 4 , 74.Xr sa 4 , 75.Xr scsi 4 76.Sh AUTHORS 77.An -nosplit 78The 79.Nm 80driver was ported by 81.An Justin T. Gibbs 82from the Linux driver written by 83.An Bob Frey 84of Advanced System Products, Inc. 85Many thanks to AdvanSys for providing the original driver 86under a suitable license for use in 87.Fx . 88.Sh HISTORY 89The 90.Nm 91driver appeared in 92.Fx 3.0 . 93