03b1fa9de4
mps(4) sends StartStopUnit to SATA direct-access devices during shutdown. Document the tunables which control that behavior. PR: 195033 Reviewed by: scottl Approved by: jhb MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D4456
262 lines
6.3 KiB
Groff
262 lines
6.3 KiB
Groff
.\"
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.\" Copyright (c) 2010 Spectra Logic Corporation
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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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.\" without modification.
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.\" 2. Redistributions in binary form must reproduce at minimum a disclaimer
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.\" substantially similar to the "NO WARRANTY" disclaimer below
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.\" ("Disclaimer") and any redistribution must be conditioned upon
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.\" including a substantially similar Disclaimer requirement for further
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.\" binary redistribution.
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.\"
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.\" NO WARRANTY
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.\" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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.\" "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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.\" LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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.\" A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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.\" HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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,
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.\" STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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.\" IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGES.
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.\"
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.\" mps driver man page.
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.\"
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.\" Author: Ken Merry <ken@FreeBSD.org>
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.\"
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.\" $Id: //depot/SpectraBSD/head/share/man/man4/mps.4#6 $
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.\" $FreeBSD$
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.\"
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.Dd December 9, 2015
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.Dt MPS 4
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.Os
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.Sh NAME
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.Nm mps
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.Nd LSI Fusion-MPT 2 Serial Attached SCSI driver
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.Sh SYNOPSIS
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To compile this driver into your kernel,
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place the following lines in your kernel configuration file:
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.Bd -ragged -offset indent
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.Cd "device scbus"
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.Cd "device mps"
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.Ed
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.Pp
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Or, to load the driver as a module at boot, place the following line in
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.Xr loader.conf 5 :
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.Bd -literal -offset indent
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mps_load="YES"
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.Ed
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.Sh DESCRIPTION
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The
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.Nm
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driver provides support for LSI Logic Fusion-MPT 2
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.Tn SAS
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controllers and WarpDrive solid state storage cards.
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.Sh HARDWARE
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The
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.Nm
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driver supports the following hardware:
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.Pp
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.Bl -bullet -compact
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.It
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LSI Logic SAS2004 (4 Port
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.Tn SAS )
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.It
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LSI Logic SAS2008 (8 Port
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.Tn SAS )
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.It
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LSI Logic SAS2108 (8 Port
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.Tn SAS )
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.It
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LSI Logic SAS2116 (16 Port
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.Tn SAS )
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.It
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LSI Logic SAS2208 (8 Port
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.Tn SAS )
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.It
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LSI Logic SAS2308 (8 Port
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.Tn SAS )
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.It
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LSI Logic SSS6200 Solid State Storage
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.It
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Intel Integrated RAID Module RMS25JB040
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.It
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Intel Integrated RAID Module RMS25JB080
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.It
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Intel Integrated RAID Module RMS25KB040
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.It
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Intel Integrated RAID Module RMS25KB080
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.El
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.Sh CONFIGURATION
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To disable MSI interrupts for all
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.Nm
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driver instances, set the following tunable value in
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.Xr loader.conf 5 :
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.Bd -literal -offset indent
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hw.mps.disable_msi=1
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.Ed
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.Pp
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To disable MSI interrupts for a specific
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.Nm
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driver instance, set the following tunable value in
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.Xr loader.conf 5 :
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.Bd -literal -offset indent
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dev.mps.X.disable_msi=1
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.Ed
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.Pp
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where X is the adapter number.
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.Pp
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To disable MSI-X interrupts for all
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.Nm
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driver instances, set the following tunable value in
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.Xr loader.conf 5 :
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.Bd -literal -offset indent
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hw.mps.disable_msix=1
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.Ed
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.Pp
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To disable MSI-X interrupts for a specific
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.Nm
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driver instance, set the following tunable value in
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.Xr loader.conf 5 :
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.Bd -literal -offset indent
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dev.mps.X.disable_msix=1
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.Ed
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.Pp
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where X is the adapter number.
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.Pp
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To set the maximum number of DMA chains allocated for all adapters,
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set the following variable in
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.Xr loader.conf 5 :
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.Bd -literal -offset indent
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hw.mps.max_chains=NNNN
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.Ed
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.Pp
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To set the maximum number of DMA chains allocated for a specific adapter,
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set the following variable in
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.Xr loader.conf 5 :
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.Bd -literal -offset indent
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dev.mps.X.max_chains=NNNN
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.Ed
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.Pp
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This variable may also be viewed via
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.Xr sysctl 8
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to see the maximum set for a given adapter.
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.Pp
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The current number of free chain frames may be seen via the
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dev.mps.X.chain_free
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.Xr sysctl 8
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variable.
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.Pp
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The lowest number of free chain frames may be seen via the
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dev.mps.X.chain_free_lowwater
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.Xr sysctl 8
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variable.
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.Pp
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The current number of active I/O commands is shown in the
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dev.mps.X.io_cmds_active
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.Xr sysctl 8
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variable.
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.Pp
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The maximum number of active I/O command seen since boot is shown in the
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dev.mps.X.io_cmds_highwater
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.Xr sysctl 8
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variable.
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.Pp
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The adapter can issue the
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.Sy StartStopUnit
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SCSI command to SATA direct-access devices during shutdown, to allow the
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device to quiesce before being powered down.
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To control this feature for all adapters, set the
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.Bd -literal -offset indent
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hw.mps.enable_ssu
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.Ed
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.Pp
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tunable value in
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.Xr loader.conf 5
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to one of the following values:
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.Bl -tag -width 6n -offset indent
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.It 0
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Do not send SSU to either HDDs or SSDs.
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.It 1
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Send SSU to SSDs, but not to HDDs; this is the default value.
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.It 2
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Send SSU to HDDs, but not to SSDs.
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.It 3
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Send SSU to both HDDs and SSDs.
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.El
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.Pp
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To control the feature for a specific adapter, set the following tunable
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value in
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.Xr loader.conf 5 :
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.Bd -literal -offset indent
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dev.mps.X.enable_ssu
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.Ed
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.Pp
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where X is the adapter number.
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The same set of values are valid as for all adapters.
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.Sh DEBUGGING
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To enable debugging prints from the
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.Nm
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driver, set the
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.Bd -literal -offset indent
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hw.mps.X.debug_level
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.Ed
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.Pp
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variable, where X is the adapter number, either in
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.Xr loader.conf 5
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or via
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.Xr sysctl 8 .
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The following bits have the described effects:
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.Bl -tag -width 6n -offset indent
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.It 0x01
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Enable informational prints.
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.It 0x02
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Enable tracing prints.
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.It 0x04
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Enable prints for driver faults.
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.It 0x08
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Enable prints for controller events.
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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 da 4 ,
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.Xr mpt 4 ,
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.Xr pci 4 ,
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.Xr sa 4 ,
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.Xr scsi 4 ,
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.Xr targ 4 ,
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.Xr loader.conf 5 ,
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.Xr sysctl 8
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.Sh HISTORY
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The
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.Nm
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driver first appeared in
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.Fx 9.0 .
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.Sh AUTHORS
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.An -nosplit
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The
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.Nm
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driver was originally written by
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.An Scott Long Aq Mt scottl@FreeBSD.org .
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It has been improved and tested by LSI Logic Corporation.
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This man page was written by
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.An Ken Merry Aq Mt ken@FreeBSD.org .
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.Sh BUGS
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This driver has a couple of known shortcomings:
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.Bl -bullet -compact
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.It
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No userland utility available (e.g.,
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.Xr mptutil 8 ) .
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.It
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The driver probes devices sequentially.
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If your system has a large number of devices, the probe will take a while.
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.El
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