207 lines
6.6 KiB
Groff
207 lines
6.6 KiB
Groff
.\"
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.\" Copyright (c) 2000 Michael Smith
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.\" Copyright (c) 2000 BSDi
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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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.\" $FreeBSD$
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.\"
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.Dd April 10, 2000
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.Dt TWE 4
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.Os
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.Sh NAME
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.Nm twe
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.Nd 3ware Escalade ATA RAID adapter driver
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.Sh SYNOPSIS
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.Cd device pci
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.Cd device twe
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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 Escalade 3W-5x00 and 3W-6x00 series
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of ATA RAID controllers.
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These devices support 2, 4 or 8 ATA disk drives
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and provide RAID0 (striping) and RAID1 (mirroring) functionality.
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.Sh DIAGNOSTICS
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.Ss Controller initialisation phase
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.Bl -diag
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.It twe%d: microcontroller not ready
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.Pp
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The controller's onboard CPU is not reporting that it is ready;
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this may be due to either a board or system failure.
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Initialisation has failed.
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.It twe%d: no attention interrupt
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.It twe%d: can't drain AEN queue
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.It twe%d: reset not reported
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.It twe%d: controller errors detected
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.It twe%d: can't drain response queue
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.It twe%d: reset %d failed, trying again
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.Pp
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The controller is not responding correctly to
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the driver's attempts to reset and initialise it.
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This process is retried several times.
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.It twe%d: can't initialise controller, giving up
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.Pp
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Several attempts to reset and initialise the controller have failed;
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initialisation has failed
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and the driver will not attach to this controller.
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.Ss Driver initialisation/shutdown phase
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.Bl -diag
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.It twe%d: register window not available
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.It twe%d: can't allocate register window
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.It twe%d: can't allocate parent DMA tag
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.It twe%d: can't allocate interrupt
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.It twe%d: can't set up interrupt
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.It twe%d: can't establish configuration hook
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.Pp
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A resource allocation error occurred while initialising the driver;
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initialisation has failed
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and the driver will not attach to this controller.
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.It twe%d: can't detect attached units
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.Pp
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Fetching the list of attached units failed; initialisation has failed.
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.It twe%d: error fetching capacity for unit %d
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.It twe%d: error fetching state for unit %d
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.It twe%d: error fetching descriptor size for unit %d
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.It twe%d: error fetching descriptor for unit %d
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.It twe%d: device_add_child failed
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.It twe%d: bus_generic_attach returned %d
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.Pp
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Creation of the disk devices failed, either due to communications
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problems with the adapter or due to resource shortage;
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attachment of one or more units may have been aborted.
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.Ss Operational phase
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.Bl -diag
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.It twe%d: command completed - %s
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.El
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.Pp
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A command was reported completed with a warning by the controller.
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The warning may be one of:
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.Bl -diag
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.It redundant/inconsequential request ignored
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.It failed to write zeroes to LBA 0
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.It failed to profile TwinStor zones
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.El
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.Bl -diag
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.It twe%d: command failed - %s
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.El
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.Pp
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A command was reported as failed by the controller.
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The failure message may be one of:
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.Bl -diag
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.It aborted due to system command or reconfiguration
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.It aborted
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.It access error
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.It access violation
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.It device failure
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.It controller error
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.It timed out
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.It invalid unit number
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.It unit not available
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.It undefined opcode
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.It request incompatible with unit
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.It invalid request
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.It firmware error, reset requested
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.Pp
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The command will be returned to the operating system after a
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fatal error.
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.El
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.Bl -diag
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.It twe%d: command failed submission - controller wedged
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.Pp
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A command could not be delivered to the controller because
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the controller is unresponsive.
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.It twe%d: AEN: <%s>
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.El
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.Pp
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The controller has reported a change in status using an AEN
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(Asynchronous Event Notification).
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The following AENs may be reported:
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.Bl -diag
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.It queue empty
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.It soft reset
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.It degraded mirror
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.It controller error
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.It rebuild fail
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.It rebuild done
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.It incomplete unit
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.It initialisation done
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.It unclean shutdown detected
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.It drive timeout
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.It drive error
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.It rebuild started
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.It aen queue full
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.Pp
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AENs are also queued internally for use by management tools.
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.El
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.Bl -diag
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.It twe%d: error polling for signalled AENs
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.Pp
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The controller has reported
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that one or more status messages are ready for the driver,
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but attempting to fetch one of these has returned an error.
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.It twe%d: AEN queue overflow, lost AEN <%s>
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.Pp
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A status message was retrieved from the controller,
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but there is no more room to queue it in the driver.
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The message is lost (but will be printed to the console).
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.It twe%d: missing expected status bits %s
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.It twe%d: unexpected status bits %s
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.Pp
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A check of the controller's status bits
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indicates an unexpected condition.
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.It twe%d: host interrupt
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.Pp
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The controller has signalled a host interrupt.
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This serves an unknown purpose and is ignored.
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.It twe%d: command interrupt
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.Pp
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The controller has signalled a command interrupt.
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This is not used, and will be disabled.
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.It twe%d: controller reset in progress...
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.Pp
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The controller is being reset by the driver.
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Typically this is done when the driver has determined that the
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controller is in an unrecoverable state.
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.It twe%d: can't reset controller, giving up
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.Pp
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The driver has given up on resetting the controller.
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No further I/O will be handled.
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.It controller reset done, %d commands restarted
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.Pp
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The controller was successfully reset,
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and outstanding commands were restarted.
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.Sh BUGS
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The controller cannot handle I/O transfers
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that are not aligned to a 512-byte boundary.
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In order to support raw device access from user-space,
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the driver will perform alignment fixup on non-aligned data.
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This process is inefficient,
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and thus in order to obtain best performance
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user-space applications accessing the device
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should do so with aligned buffers.
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.Sh AUTHORS
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The
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.Nm
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driver and manpage were written by
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.An Michael Smith
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.Aq msmith@FreeBSD.org .
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