125 lines
3.8 KiB
Groff
125 lines
3.8 KiB
Groff
.\" $NetBSD: dpt.4,v 1.18 2002/02/07 03:15:08 ross Exp $
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.\"
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.\" Copyright (c) 1999, 2000 Andy Doran <ad@NetBSD.org>
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. The name of the author may not be used to endorse or promote products
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.\" derived from this software without specific prior written permission
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd September 28, 1999
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.Dt DPT 4
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.Os
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.Sh NAME
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.Nm dpt
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.Nd
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DPT EATA
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.Tn SCSI
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adapter driver
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.Sh SYNOPSIS
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.Cd "dpt* at isa? port ? irq ? dma ?"
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.Cd "dpt* at eisa? slot ?"
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.Cd "dpt* at pci? dev ? function ?"
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.Cd "scsibus* at dpt?"
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.Sh DESCRIPTION
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The
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.Nm
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driver provides support for third and fourth generation DPT
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.Tn SCSI
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controllers. All communication with the controllers is conducted via the
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EATA (Enhanced AT Bus Attachment) protocol.
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.Pp
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DPT adapters examine and interpret all
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.Tn SCSI
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commands received before passing them to any underlying physical device(s).
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In this way, caching, RAID and other transformations are achieved while
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remaining transparent to the host operating system.
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.Sh HARDWARE
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The
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.Nm
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driver provides support for the adapters listed below. Later models are
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supported by the
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.Nm iop
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driver.
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.Pp
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.Bl -tag -width Dv -offset indent -compact
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.It Tn DPT SmartCache III
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.It Tn DPT SmartCache IV
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.It Tn DPT SmartRAID III
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.It Tn DPT SmartRAID IV
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.El
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.Sh DIAGNOSTICS
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None of these messages should be encountered under normal circumstances. It
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should be noted that the list below is not complete.
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.Pp
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.Bl -tag -width indent
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.It dpt%d: readcfg failed - see dpt(4)
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.br
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The EATA configuration data did not appear upon request. This may be caused
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by older firmware. Generally the solution is to power-cycle the affected
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machine.
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.br
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.It dpt%d: spurious intr
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.br
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A spurious interrupt was received from the HBA.
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.br
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.It dpt%d: bogus status (returned CCB id NNNN)
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.br
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A corrupt or incomplete status packet was received from the HBA.
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.El
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.Sh SEE ALSO
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.Xr cd 4 ,
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.Xr ch 4 ,
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.Xr intro 4 ,
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.Xr iop 4 ,
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.Xr scsi 4 ,
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.Xr sd 4 ,
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.Xr st 4
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.Pp
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CAM committee standard CAM/89-004 - the EATA (Enhanced AT Bus Attachment)
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protocol.
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.Sh HISTORY
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The
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.Nm dpt
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driver first appeared in
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.Nx 1.4.2 .
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.Sh AUTHORS
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The
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.Nm
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driver was written by
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.An Andrew Doran Aq ad@netbsd.org ,
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based upon the
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.Nm uha
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and
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.Nm bha
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drivers, which are the work of others.
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.Sh BUGS
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EATA adapters other than listed may function correctly with the
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.Nm
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driver, however a definitive list is not available.
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.Pp
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Older firmware may prove problematic. It is recommended that the latest
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available firmware be used. Contact DPT for a firmware update.
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.Pp
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Older boards that do not support scatter-gather I/O or DMA are not supported.
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.Pp
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The number of queued commands available on ISA devices is clamped.
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.Pp
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ECC formatted disk and arrays (i.e. with a sector size of 528 bytes) do not
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work correctly with the PM2041 and certain firmware revisions of the PM3334.
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