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MPS(4)                DragonFly Kernel Interfaces Manual                MPS(4)


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.msi.enable=0

     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):

           hw.mpsX.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
     hw.mpsX.chain_free sysctl(8) variable.

     The lowest number of free chain frames may be seen via the
     hw.mpsX.chain_free_lowwater sysctl(8) variable.

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

     The maximum number of active I/O command seen since boot is shown in the
     hw.mpsX.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), mpr(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.

DragonFly 5.9-DEVELOPMENT       April 24, 2018       DragonFly 5.9-DEVELOPMENT

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