1.\" 2.\" Copyright (c) 1994 Jordan Hubbard 3.\" 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. Redistributions in binary form must reproduce the above copyright 11.\" notice, this list of conditions and the following disclaimer in the 12.\" documentation and/or other materials provided with the distribution. 13.\" 3. The name of the author may not be used to endorse or promote products 14.\" derived from this software without specific prior written permission 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26.\" 27.\" $FreeBSD: src/share/man/man4/bt.4,v 1.10.4.6 2001/10/01 13:07:23 dd Exp $ 28.\" 29.Dd November 29, 2012 30.Dt BT 4 31.Os 32.Sh NAME 33.Nm bt 34.Nd Buslogic/Mylex MultiMaster SCSI host adapter driver 35.Sh SYNOPSIS 36To compile this driver into the kernel, 37place the following lines in your 38kernel configuration file: 39.Bd -ragged -offset indent 40.Cd "device scbus" 41.Cd "device bt" 42.Ed 43.Sh DESCRIPTION 44This driver provides access to the 45.Tn SCSI 46bus connected to a Buslogic/Mylex MultiMaster or compatible controller: 47.Bd -ragged -offset indent 48MultiMaster "W" Series Host Adapters: 49.Bl -column "BT-956CD " "PCI " "Commands " "Description" 50.Em "Adapter" Ta Em "Bus" Ta Em "Commands" Ta Em "Description" 51BT-948 PCI 192 Ultra SCSI-3 52BT-958 PCI 192 Wide Ultra SCSI-3 53BT-958D PCI 192 Wide Differential Ultra SCSI-3 54.El 55.Pp 56MultiMaster "C" Series Host Adapters: 57.Bl -column "BT-956CD " "PCI " "Commands " "Description" 58.Em "Adapter" Ta Em "Bus" Ta Em "Commands" Ta Em "Description" 59BT-946C PCI 100 Fast SCSI-2 60BT-956C PCI 100 Wide Fast SCSI-2 61BT-956CD PCI 100 Wide Differential Fast SCSI-2 62.El 63.Ed 64.Pp 65AMI FastDisk Host Adapters that are true BusLogic MultiMaster clones are also 66supported by this driver. 67.Pp 68Tagged queueing is supported on 'W' series adapters and 'C' series adapters 69with firmware of rev 4.42 and higher. 70.Pp 71Boards with certain firmware revisions may lock up under heavy load to 72certain devices, especially if tagged queueing is used. 73Should you encounter 74a problem with your adapter, contact Mylex technical support and ensure you 75have the latest firmware for your controller. 76.Sh FILES 77.Bl -tag -width /usr/share/man0/template.doc -compact 78.It Pa /sys/dev/disk/buslogic/bt.c 79Core Driver Implementation 80.It Pa /sys/dev/disk/buslogic/btreg.h 81MultiMaster Register Set and Core Driver Data Structures 82.It Pa /sys/dev/disk/buslogic/bt_pci.c 83PCI Bus Driver Attachment 84.El 85.Sh SEE ALSO 86.Xr cd 4 , 87.Xr da 4 , 88.Xr sa 4 , 89.Xr scsi 4 90.Sh HISTORY 91The 92.Nm 93driver first appeared in the 94.Bx 386 95patch kit. 96.Sh AUTHORS 97.An -nosplit 98.An Julian Elischer 99wrote a driver for the Multimaster cards that appeared in the 100.Bx 386 101patch kit. 102The driver was rewritten by 103.An Justin T. Gibbs 104to take advantage of new board features and work with the CAM SCSI framework in 105.Fx 3.0 . 106.Pp 107Special thanks to 108.An Leonard N. Zubkoff 109for writing such a complete and well documented Mylex/BusLogic MultiMaster 110driver for Linux. 111Support in this driver for the wide range of MultiMaster 112controllers and firmware revisions, with their otherwise undocumented quirks, 113would not have been possible without his efforts. 114