NAME

       mps — LSI Fusion-MPT 2 Serial Attached SCSI driver

SYNOPSIS

       To compile this driver into your kernel, place the following lines in your kernel configuration file:

             device scbus
             device mps

       Or, to load the driver as a module at boot, place the following line in loader.conf(5):

             mps_load="YES"

DESCRIPTION

       The  mps  driver  provides  support  for LSI Logic Fusion-MPT 2 SAS controllers and WarpDrive solid state
       storage cards.

HARDWARE

       The mps driver supports the following hardware:

       •   LSI Logic SAS2004 (4 Port SAS)
       •   LSI Logic SAS2008 (8 Port SAS)
       •   LSI Logic SAS2108 (8 Port SAS)
       •   LSI Logic SAS2116 (16 Port SAS)
       •   LSI Logic SAS2208 (8 Port SAS)
       •   LSI Logic SAS2308 (8 Port SAS)
       •   LSI Logic SSS6200 Solid State Storage
       •   Intel Integrated RAID Module RMS25JB040
       •   Intel Integrated RAID Module RMS25JB080
       •   Intel Integrated RAID Module RMS25KB040
       •   Intel Integrated RAID Module RMS25KB080

CONFIGURATION

       To  disable  MSI  interrupts  for  all  mps  driver  instances,  set  the  following  tunable  value   in
       loader.conf(5):

             hw.mps.disable_msi=1

       To  disable  MSI  interrupts  for  a  specific  mps  driver  instance, set the following tunable value in
       loader.conf(5):

             dev.mps.X.disable_msi=1

       where X is the adapter number.

       To disable  MSI-X  interrupts  for  all  mps  driver  instances,  set  the  following  tunable  value  in
       loader.conf(5):

             hw.mps.disable_msix=1

       To  disable  MSI-X  interrupts  for  a  specific  mps driver instance, set the following tunable value in
       loader.conf(5):

             dev.mps.X.disable_msix=1

       To set the maximum number of DMA chains allocated  for  all  adapters,  set  the  following  variable  in
       loader.conf(5):

             hw.mps.max_chains=NNNN

       To  set  the maximum number of DMA chains allocated for a specific adapter, set the following variable in
       loader.conf(5):

             dev.mps.X.max_chains=NNNN

       This variable may also be viewed via sysctl(8) to see the maximum set for a given adapter.

       The current number of free chain frames may be seen via the dev.mps.X.chain_free sysctl(8) variable.

       The lowest number of free chain frames  may  be  seen  via  the  dev.mps.X.chain_free_lowwater  sysctl(8)
       variable.

       The current number of active I/O commands is shown in the dev.mps.X.io_cmds_active sysctl(8) variable.

       The  maximum  number  of  active  I/O command seen since boot is shown in the dev.mps.X.io_cmds_highwater
       sysctl(8) variable.

DEBUGGING

       To enable debugging prints from the mps driver, set the

             hw.mps.X.debug_level

       variable, where X is the adapter number, either in loader.conf(5) or via sysctl(8).  The  following  bits
       have the described effects:

             0x01    Enable informational prints.

             0x02    Enable tracing prints.

             0x04    Enable prints for driver faults.

             0x08    Enable prints for controller events.

SEE ALSO

       cd(4), ch(4), da(4), mpt(4), pci(4), sa(4), scsi(4), targ(4), loader.conf(5), sysctl(8)

HISTORY

       The mps driver first appeared in FreeBSD 9.0.

AUTHORS

       The  mps  driver  was  originally  written  by Scott Long <scottl@FreeBSD.org>.  It has been improved and
       tested by LSI Logic Corporation.  This man page was written by Ken Merry <ken@FreeBSD.org>.

BUGS

       This driver has a couple of known shortcomings:
       •   No userland utility available (e.g.  mptutil(8)).
       •   The driver probes devices sequentially.  If your system has a large number of devices, the probe will
           take a while.

Debian                                           January 3, 2013                                          MPS(4)