178 lines
4.3 KiB
Groff
178 lines
4.3 KiB
Groff
.\"
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.\" Copyright (c) 2004 Tom Rhodes
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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. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd July 28, 2004
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.Dt ESP 4
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.Os
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.Sh NAME
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.Nm esp
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.Nd Qlogic FEPS and FAS366 SCSI driver
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.Sh SYNOPSIS
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.Cd device scbus
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.Cd device esp
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.Sh DESCRIPTION
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The
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.Nm
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driver provides support for the
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.Tn Qlogic
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FAS216 and FAS408
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.Tn SCSI
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controller chips found in a wide variety of systems and peripheral boards.
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This includes the
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.Tn Qlogic
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.Tn SCSI
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cards found in most
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.Tn Sun
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.Tn Ultra 1e
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and
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.Tn Ultra 2
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machines.
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.Pp
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For
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.Tn Qlogic
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.Tn PCI
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.Tn SCSI
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host adapters, the
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.Xr isp 4
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driver should be used in place of the
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.Nm
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driver.
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.Sh IMPLEMENTATION NOTES
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During the boot sequence, the
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.Nm
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driver
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searches the linked list for LUN info by LUN ID.
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At this point the driver will attach on that instance,
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and then attempt to attach every sub-device.
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.Pp
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There are at least 4 variations of the
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configuration 3 register.
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A second config register must be loaded to inquire the chip revision,
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otherwise the
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.Fn ncr53c9x_reset
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function will not set the defaults correctly.
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.Pp
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The drive attach routine attempts to set the appropriate
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bit to put the chip into Fast
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.Tn SCSI
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mode so that it does not
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have to be figured out each time.
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This will then be stored in the
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.Tn NCR
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registers for later use.
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.Pp
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The
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.Nm
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driver makes use of the
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.Tn LSI
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64854
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.Tn DMA
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engine which contains three independent
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channels designed to interface with
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an NCR539X
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.Tn SCSI
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controller;
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an AM7990 Ethernet controller;
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and certain types of parallel port hardware.
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As such this driver may eventually replace the
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.Xr amd 4
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driver for network hardware.
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.Sh DIAGNOSTICS
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The following driver specific error messages
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may be reported:
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.Bl -diag
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.It "esp: cannot map %d segments"
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The device was unable to map segments while mapping the
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.Tn SCSI
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devices in
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.Tn DMA
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mode.
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.It "unknown variant %d, devices not attached"
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An unknown version of the card was found and devices will
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not be attached.
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.It "Unhandled function code %d"
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The device returned a function code which the driver is
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unable to handle, most likely during negotiation.
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.It "esp:%d:%d): selection failed %d left in FIFO"
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The target left the command phase prematurely.
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If a command did not reach the device then it will
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be reported as shown above.
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.It "invalid state: %d"
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The device has reached an invalid state.
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.El
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.Sh SEE ALSO
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.Xr amd 4 ,
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.Xr isp 4 ,
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.Xr scbus 4 ,
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.Xr camcontrol 8
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.Pp
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.Bl -item -compact
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.It
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.Pa http://www.qlc.com/
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.It
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.Pa http://www.sun.com/
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.El
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.Sh HISTORY
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The
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.Nm
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driver was written for
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.Nx
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by
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.An Eric S. Hvozda .
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The
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.Nm
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driver was then ported to
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.Fx 5.3
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by
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.An Scott Long Aq scottl@FreeBSD.org .
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.Sh AUTHORS
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This manual page was written by
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.An Tom Rhodes Aq trhodes@FreeBSD.org
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instead of porting the original from
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.Nx .
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.Sh BUGS
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The
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.Nm
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driver includes the sbus front-end but lacks the
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.Tn PCI
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front-end.
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Thus it can only support the
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.Tn FEPS/FAS366
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.Tn SCSI
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found in
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.Tn Sun
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.Tn Ultra 1e
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and
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.Tn Ultra 2
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machines at this time.
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.Pp
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This driver should eventually replace the
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.Xr amd 4
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driver, but that requires porting the
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.Tn PCI
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front-end mentioned above.
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