MFC the mpr(4) driver for LSI's 12Gb SAS cards.

This includes r265236, r265237, r265241 and r265261:

  ------------------------------------------------------------------------
  r265236 | ken | 2014-05-02 14:25:09 -0600 (Fri, 02 May 2014) | 51 lines

  Bring in the mpr(4) driver for LSI's MPT3 12Gb SAS controllers.

  This is derived from the mps(4) driver, but it supports only the 12Gb
  IT and IR hardware including the SAS 3004, SAS 3008 and SAS 3108.

  Some notes about this driver:
   o The 12Gb hardware can do "FastPath" I/O, and that capability is included in
     this driver.

   o WarpDrive functionality has been removed, since it isn't supported in
     the 12Gb driver interface.

   o The Scatter/Gather list handling code is significantly different between
     the 6Gb and 12Gb hardware.  The 12Gb boards support IEEE Scatter/Gather
     lists.

  Thanks to LSI for developing and testing this driver for FreeBSD.

  share/man/man4/mpr.4:
  	mpr(4) man page.

  sys/dev/mpr/*:
  	mpr(4) driver files.

  sys/modules/Makefile,
  sys/modules/mpr/Makefile:
  	Add a module Makefile for the mpr(4) driver.

  sys/conf/files:
  	Add the mpr(4) driver.

  sys/amd64/conf/GENERIC,
  sys/i386/conf/GENERIC,
  sys/mips/conf/OCTEON1,
  sys/sparc64/conf/GENERIC:
  	Add the mpr(4) driver to all config files that currently
  	have the mps(4) driver.

  sys/ia64/conf/GENERIC:
  	Add the mps(4) and mpr(4) drivers to the ia64 GENERIC
  	config file.

  sys/i386/conf/XEN:
  	Exclude the mpr module from building here.

  Submitted by:	Steve McConnell <Stephen.McConnell@lsi.com>
  Tested by:	Chris Reeves <chrisr@spectralogic.com>
  Sponsored by:	LSI, Spectra Logic
  Relnotes:	LSI 12Gb SAS driver mpr(4) added

  ------------------------------------------------------------------------
  ------------------------------------------------------------------------
  r265237 | ken | 2014-05-02 14:36:20 -0600 (Fri, 02 May 2014) | 8 lines

  Add the mpr(4) man page to the man4 Makefile.

  This should have been included in r265236.

  Submitted by:	Steve McConnell <Stephen.McConnell@lsi.com>
  MFC after:	3 days
  Sponsored by:	LSI, Spectra Logic

  ------------------------------------------------------------------------
  ------------------------------------------------------------------------
  r265241 | brueffer | 2014-05-02 15:14:28 -0600 (Fri, 02 May 2014) | 2 lines

  Use our standard SYNOPSIS wording; perform some cleanup while here.

  ------------------------------------------------------------------------
  ------------------------------------------------------------------------
  r265261 | brueffer | 2014-05-03 05:15:28 -0600 (Sat, 03 May 2014) | 2 lines

  Add a missing colon.

  ------------------------------------------------------------------------

Submitted by:	Steve McConnell <Stephen.McConnell@lsi.com>
Tested by:	Chris Reeves <chrisr@spectralogic.com>
Sponsored by:	LSI, Spectra Logic
Relnotes:	LSI 12Gb SAS driver mpr(4) added

1 files changed, 229 insertions, 0 deletions

diff --git a/share/man/man4/mpr.4 b/share/man/man4/mpr.4
new file mode 100644
index 0000000..4a42fa1
--- /dev/null
+++ b/share/man/man4/mpr.4
@@ -0,0 +1,229 @@
+.\"
+.\" Copyright (c) 2010 Spectra Logic Corporation
+.\" Copyright (c) 2014 LSI Corp
+.\" All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions, and the following disclaimer,
+.\"    without modification.
+.\" 2. Redistributions in binary form must reproduce at minimum a disclaimer
+.\"    substantially similar to the "NO WARRANTY" disclaimer below
+.\"    ("Disclaimer") and any redistribution must be conditioned upon
+.\"    including a substantially similar Disclaimer requirement for further
+.\"    binary redistribution.
+.\"
+.\" NO WARRANTY
+.\" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+.\" "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+.\" LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+.\" A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+.\" HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+.\" STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+.\" IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+.\" POSSIBILITY OF SUCH DAMAGES.
+.\" 
+.\" mpr driver man page.
+.\"
+.\" Author: Ken Merry <ken@FreeBSD.org>
+.\" Author: Stephen McConnell <stephen.mcconnell@lsi.com>
+.\"
+.\" $Id$
+.\" $FreeBSD$
+.\"
+.Dd May 2, 2014
+.Dt MPR 4
+.Os
+.Sh NAME
+.Nm mpr
+.Nd "LSI Fusion-MPT 3 IT/IR 12Gb/s Serial Attached SCSI/SATA driver"
+.Sh SYNOPSIS
+To compile this driver into the kernel, place the following lines in your
+kernel configuration file:
+.Bd -ragged -offset indent
+.Cd "device pci"
+.Cd "device scbus"
+.Cd "device mpr"
+.Ed
+.Pp
+Alternatively, to load the driver as a
+module at boot time, place the following line in
+.Xr loader.conf 5 :
+.Bd -literal -offset indent
+mpr_load="YES"
+.Ed
+.Sh DESCRIPTION
+The
+.Nm 
+driver provides support for LSI Fusion-MPT 3 IT/IR
+.Tn SAS
+controllers.
+.Sh HARDWARE
+The following controllers are supported by the
+.Nm
+driver:
+.Pp
+.Bl -bullet -compact
+.It
+LSI SAS 3004 (4 Port SAS)
+.It
+LSI SAS 3008 (8 Port SAS)
+.It
+LSI SAS 3108 (8 Port SAS)
+.El
+.Sh CONFIGURATION
+To disable MSI interrupts for all
+.Nm
+driver instances, set the following tunable value in
+.Xr loader.conf 5 :
+.Bd -literal -offset indent
+hw.mpr.disable_msi=1
+.Ed
+.Pp
+To disable MSI interrupts for a specific
+.Nm
+driver instance, set the following tunable value in
+.Xr loader.conf 5 :
+.Bd -literal -offset indent
+dev.mpr.X.disable_msi=1
+.Ed
+.Pp
+where X is the adapter number.
+.Pp
+To disable MSI-X interrupts for all
+.Nm
+driver instances, set the following tunable value in
+.Xr loader.conf 5 :
+.Bd -literal -offset indent
+hw.mpr.disable_msix=1
+.Ed
+.Pp
+To disable MSI-X interrupts for a specific
+.Nm
+driver instance, set the following tunable value in
+.Xr loader.conf 5 :
+.Bd -literal -offset indent
+dev.mpr.X.disable_msix=1
+.Ed
+.Pp
+To set the maximum number of DMA chains allocated for all adapters, set
+the following variable in
+.Xr loader.conf 5 :
+.Bd -literal -offset indent
+hw.mpr.max_chains=NNNN
+.Ed
+.Pp
+To set the maximum number of DMA chains allocated for a specific adapter,
+set the following variable in
+.Xr loader.conf 5 :
+.Bd -literal -offset indent
+dev.mpr.X.max_chains=NNNN
+.Ed
+.Pp
+This variable may also be viewed via
+.Xr sysctl 8
+to see the maximum set for a given adapter.
+.Pp
+The current number of free chain frames may be seen via the
+dev.mpr.X.chain_free
+.Xr sysctl 8
+variable.
+.Pp
+The lowest number of free chain frames may be seen via the
+dev.mpr.X.chain_free_lowwater
+.Xr sysctl 8
+variable.
+.Pp
+The current number of active I/O commands is shown in the
+dev.mpr.X.io_cmds_active
+.Xr sysctl 8
+variable.
+.Pp
+The maximum number of active I/O commands seen since boot is shown in the
+dev.mpr.X.io_cmds_highwater
+.Xr sysctl 8
+variable.
+.Pp
+Devices can be excluded from
+.Nm
+control for all adapters by setting the following variable in
+.Xr loader.conf 5 :
+.Bd -literal -offset indent
+hw.mpr.exclude_ids=Y
+.Ed
+.Pp
+where Y is the target ID of the device.
+If more than one device is to be
+excluded, target ID's are separated by commas.
+.Pp
+Devices can be excluded from
+.Nm
+control for a specific adapter by setting the following variable in
+.Xr loader.conf 5 :
+.Bd -literal -offset indent
+dev.mpr.X.exclude_ids=Y
+.Ed
+.Pp
+where X is the adapter number and Y is the target ID of the device.
+If more
+than one device is to be excluded, target ID's are separated by commas.
+.Sh DEBUGGING
+To enable debugging prints from the
+.Nm
+driver, set the
+.Bd -literal -offset indent
+hw.mpr.X.debug_level
+.Ed
+.Pp
+variable, where X is the adapter number, either in
+.Xr loader.conf 5
+or via
+.Xr sysctl 8 .
+The following bits have the described effects:
+.Bd -literal -offset indent
+0x0001 Enable informational prints.
+0x0002 Enable prints for driver faults.
+0x0004 Enable prints for controller events.
+0x0008 Enable prints for controller logging.
+0x0010 Enable prints for tracing recovery operations.
+0x0020 Enable prints for parameter errors and programming bugs.
+0x0040 Enable prints for system initialization operations.
+0x0080 Enable prints for more detailed information.
+0x0100 Enable prints for user-generated commands.
+0x0200 Enable prints for device mapping.
+0x0400 Enable prints for tracing through driver functions.
+.Ed
+.Sh SEE ALSO
+.Xr cam 4 ,
+.Xr cd 4 ,
+.Xr ch 4 ,
+.Xr da 4 ,
+.Xr mps 4 ,
+.Xr mpt 4 ,
+.Xr pci 4 ,
+.Xr sa 4 ,
+.Xr scsi 4 ,
+.Xr targ 4 ,
+.Xr loader.conf 5 ,
+.Xr sysctl 8
+.Sh HISTORY
+The
+.Nm
+driver first appeared in FreeBSD 9.3.
+.Sh AUTHORS
+The
+.Nm
+driver was originally written by
+.An -nosplit
+.An Scott Long Aq scottl@FreeBSD.org .
+It has been improved and tested by LSI Corporation.
+.Pp
+This man page was written by
+.An Ken Merry Aq ken@FreeBSD.org
+with additional input from
+.An Stephen McConnell Aq stephen.mcconnell@lsi.com .