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 October 16, 1998 30.Dt BT 4 31.Os 32.Sh NAME 33.Nm bt 34.Nd Buslogic/Mylex MultiMaster SCSI host adapter driver 35.Sh SYNOPSIS 36.Cd "device bt0 at isa? port ? irq ?" 37.Cd device scbus0 at bt0 38.Sh DESCRIPTION 39This driver provides access to the 40.Tn SCSI 41bus connected to a Buslogic/Mylex MultiMaster or compatible controller: 42.Bd -ragged -offset indent 43.Bl -column "BT-956CD " "ISA " "Commands " Description 44MultiMaster "W" Series Host Adapters: 45.Pp 46.Em "Adapter Bus Commands Description" 47BT-948 PCI 192 ULtra SCSI-3 48BT-958 PCI 192 Wide ULtra SCSI-3 49BT-958D PCI 192 Wide Differential ULtra SCSI-3 50.El 51.Bl -column "BT-956CD " "ISA " "Commands " Description 52MultiMaster "C" Series Host Adapters: 53.Pp 54.Em "Adapter Bus Commands Description" 55BT-946C PCI 100 Fast SCSI-2 56BT-956C PCI 100 Wide Fast SCSI-2 57BT-956CD PCI 100 Wide Differential Fast SCSI-2 58BT-545C ISA 50 Fast SCSI-2 59BT-540CF ISA 50 Fast SCSI-2 60.El 61.Bl -column "BT-956CD " "ISA " "Commands " Description 62MultiMaster "S" Series Host Adapters: 63.Pp 64.Em "Adapter Bus Commands Description" 65BT-545S ISA 30 Fast SCSI-2 66BT-542D ISA 30 Differential Fast SCSI-2 67BT-542B ISA 30 SCSI-2 (542B revision H) 68.El 69.Bl -column "BT-956CD " "ISA " "Commands " Description 70MultiMaster "A" Series Host Adapters: 71.Pp 72.Em "Adapter Bus Commands Description" 73BT-542B ISA 30 SCSI-2 (542B revisions A - G) 74.El 75.Ed 76.Pp 77AMI FastDisk Host Adapters that are true BusLogic MultiMaster clones are also 78supported by this driver. 79.Pp 80Tagged queueing is supported on 'W' series adapters, 'C' series adapters 81with firmware of rev 4.42 and higher, and 'S' series adapters with firmware 82of rev 3.35 and higher. 83.Pp 84Boards with certain firmware revisions may lock up under heavy load to 85certain devices, especially if tagged queueing is used. Should you encounter 86a problem with your adapter, contact Mylex technical support and ensure you 87have the latest firmware for your controller. 88.Sh FILES 89.Bl -tag -width /usr/share/man0/template.doc -compact 90.It Pa /sys/dev/disk/buslogic/bt.c 91Core Driver Implementation 92.It Pa /sys/dev/disk/buslogic/btreg.h 93MultiMaster Register Set and Core Driver Data Structures 94.It Pa /sys/dev/disk/buslogic/bt_pci.c 95PCI Bus Driver Attachment 96.It Pa /sys/dev/disk/buslogic/bt_isa.c 97ISA Bus Driver Attachment 98.El 99.Sh SEE ALSO 100.Xr cd 4 , 101.Xr da 4 , 102.Xr sa 4 , 103.Xr scsi 4 104.Sh HISTORY 105The 106.Nm 107driver first appeared in the 108.Bx 386 109patch kit. 110.Sh AUTHORS 111.An -nosplit 112.An Julian Elischer 113wrote a driver for the Multimaster cards that appeared in the 114.Bx 386 115patch kit. The driver was rewritten by 116.An Justin T. Gibbs 117to take advantage of new board features and work with the CAM SCSI framework in 118.Fx 3.0 . 119.Pp 120Special thanks to 121.An Leonard N. Zubkoff 122for writing such a complete and well documented Mylex/BusLogic MultiMaster 123driver for Linux. Support in this driver for the wide range of MultiMaster 124controllers and firmware revisions, with their otherwise undocumented quirks, 125would not have been possible without his efforts. 126