Copyright (c) 2000 Michael Smith
Copyright (c) 2000 BSDi
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$FreeBSD: head/share/man/man4/twe.4 61941 2000-06-22 08:32:54Z sheldonh $

.Dd April 10, 2000 .Dt TWE 4 .Os .Sh NAME .Nm twe .Nd 3ware Escalade ATA RAID adapter driver .Sh SYNOPSIS .Cd device pci .Cd device twe .Sh DESCRIPTION The .Nm driver provides support for the Escalade 3W-5x00 series of ATA RAID controllers. These devices support 2, 4 or 8 ATA disk drives and provide RAID0 (striping) and RAID1 (mirroring) functionality. .Sh DIAGNOSTICS .Ss Controller initialisation phase l -diag t twe%d: microcontroller not ready

p The controller's onboard CPU is not reporting that it is ready; this may be due to either a board or system failure. Initialisation has failed. t twe%d: no attention interrupt t twe%d: can't drain AEN queue t twe%d: reset not reported t twe%d: controller errors detected t twe%d: can't drain response queue t twe%d: reset %d failed, trying again

p The controller is not responding correctly to the driver's attempts to reset and initialise it. This process is retried several times. t twe%d: can't initialise controller, giving up

p Several attempts to reset and initialise the controller have failed; initialisation has failed and the driver will not attach to this controller. .Ss Driver initialisation/shutdown phase l -diag t twe%d: register window not available t twe%d: can't allocate register window t twe%d: can't allocate parent DMA tag t twe%d: can't allocate interrupt t twe%d: can't set up interrupt t twe%d: can't establish configuration hook

p A resource allocation error occurred while initialising the driver; initialisation has failed and the driver will not attach to this controller. t twe%d: can't detect attached units

p Fetching the list of attached units failed; initialisation has failed. t twe%d: error fetching capacity for unit %d t twe%d: device_add_child failed t twe%d: bus_generic_attach returned %d

p Creation of the disk devices failed; attachment of one or more units may have been aborted. t twe%d: command failed - 0x%x t twe%d: command failed - controller wedged

p A command was reported as failed by the controller, or could not be delivered to the controller. t twe%d: host interrupt

p The controller has signalled a host interrupt. This serves an unknown purpose and is ignored. t twe%d: command interrupt

p The controller has signalled a command interrupt. This is not used, and will be disabled. t twe%d: error polling for signalled AENs

p The controller has reported that one or more status messages are ready for the driver, but attempting to fetch one of these has returned an error. t twe%d: AEN queue overflow, lost AEN <%s>

p A status message was retrieved from the controller, but there is no more room to queue it in the driver. The message is lost. t twe%d: missing expected status bits %s t twe%d: unexpected status bits %s

p A check of the controller's status bits indicates an unexpected condition. .Sh BUGS Much of the controller's status cannot currently be interpreted, due to lack of information from 3ware.

p The controller cannot handle I/O transfers that are not aligned to a 512-byte boundary. In order to support raw device access from user-space, the driver will perform alignment fixup on non-aligned data. This process is inefficient, and thus in order to obtain best performance user-space applications accessing the device should do so with aligned buffers. .Sh AUTHORS The .Nm driver and manpage were written by .An Michael Smith .Aq msmith@FreeBSD.org .