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.\" $DragonFly: src/share/man/man4/bt.4,v 1.5 2008/05/02 02:05:05 swildner Exp $ 29.\" 30.Dd October 16, 1998 31.Dt BT 4 32.Os 33.Sh NAME 34.Nm bt 35.Nd Buslogic/Mylex MultiMaster SCSI host adapter driver 36.Sh SYNOPSIS 37.Cd "device bt0 at isa? port ? irq ?" 38.Cd device scbus0 at bt0 39.Sh DESCRIPTION 40This driver provides access to the 41.Tn SCSI 42bus connected to a Buslogic/Mylex MultiMaster or compatible controller: 43.Bd -ragged -offset indent 44.Bl -column "BT-956CD " "ISA " "Commands " Description 45MultiMaster "W" Series Host Adapters: 46.Pp 47.Em "Adapter Bus Commands Description" 48BT-948 PCI 192 ULtra SCSI-3 49BT-958 PCI 192 Wide ULtra SCSI-3 50BT-958D PCI 192 Wide Differential ULtra SCSI-3 51.El 52.Bl -column "BT-956CD " "ISA " "Commands " Description 53MultiMaster "C" Series Host Adapters: 54.Pp 55.Em "Adapter Bus Commands Description" 56BT-946C PCI 100 Fast SCSI-2 57BT-956C PCI 100 Wide Fast SCSI-2 58BT-956CD PCI 100 Wide Differential Fast SCSI-2 59BT-445C VLB 100 Fast SCSI-2 60BT-747C EISA 100 Fast SCSI-2 61BT-757C EISA 100 Wide Fast SCSI-2 62BT-757CD EISA 100 Wide Differential Fast SCSI-2 63BT-545C ISA 50 Fast SCSI-2 64BT-540CF ISA 50 Fast SCSI-2 65.El 66.Bl -column "BT-956CD " "ISA " "Commands " Description 67MultiMaster "S" Series Host Adapters: 68.Pp 69.Em "Adapter Bus Commands Description" 70BT-445S VLB 30 Fast SCSI-2 71BT-747S EISA 30 Fast SCSI-2 72BT-747D EISA 30 Differential Fast SCSI-2 73BT-757S EISA 30 Wide Fast SCSI-2 74BT-757D EISA 30 Wide Differential Fast SCSI-2 75BT-545S ISA 30 Fast SCSI-2 76BT-542D ISA 30 Differential Fast SCSI-2 77BT-742A EISA 30 SCSI-2 (742A revision H) 78BT-542B ISA 30 SCSI-2 (542B revision H) 79.El 80.Bl -column "BT-956CD " "ISA " "Commands " Description 81MultiMaster "A" Series Host Adapters: 82.Pp 83.Em "Adapter Bus Commands Description" 84BT-742A EISA 30 SCSI-2 (742A revisions A - G) 85BT-542B ISA 30 SCSI-2 (542B revisions A - G) 86.El 87.Ed 88.Pp 89AMI FastDisk Host Adapters that are true BusLogic MultiMaster clones are also 90supported by this driver. 91.Pp 92Tagged queueing is supported on 'W' series adapters, 'C' series adapters 93with firmware of rev 4.42 and higher, and 'S' series adapters with firmware 94of rev 3.35 and higher. 95.Pp 96Boards with certain firmware revisions may lock up under heavy load to 97certain devices, especially if tagged queueing is used. Should you encounter 98a problem with your adapter, contact Mylex technical support and ensure you 99have the latest firmware for your controller. 100.Sh FILES 101.Bl -tag -width /usr/share/man0/template.doc -compact 102.It Pa /sys/dev/disk/buslogic/bt.c 103Core Driver Implementation 104.It Pa /sys/dev/disk/buslogic/btreg.h 105MultiMaster Register Set and Core Driver Data Structures 106.It Pa /sys/dev/disk/buslogic/bt_pci.c 107PCI Bus Driver Attachment 108.It Pa /sys/dev/disk/buslogic/bt_eisa.c 109EISA Bus Driver Attachment 110.It Pa /sys/dev/disk/buslogic/bt_isa.c 111ISA/VL Bus Driver Attachment 112.El 113.Sh SEE ALSO 114.Xr cd 4 , 115.Xr da 4 , 116.Xr sa 4 , 117.Xr scsi 4 118.Sh HISTORY 119The 120.Nm 121driver first appeared in the 122.Bx 386 123patch kit. 124.Sh AUTHORS 125.An -nosplit 126.An Julian Elischer 127wrote a driver for the Multimaster cards that appeared in the 128.Bx 386 129patch kit. The driver was rewritten by 130.An Justin T. Gibbs 131to take advantage of new board features and work with the CAM SCSI framework in 132.Fx 3.0 . 133.Pp 134Special thanks to 135.An Leonard N. Zubkoff 136for writing such a complete and well documented Mylex/BusLogic MultiMaster 137driver for Linux. Support in this driver for the wide range of MultiMaster 138controllers and firmware revisions, with their otherwise undocumented quirks, 139would not have been possible without his efforts. 140