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MPS(4)			 BSD 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 con-
     trollers and WarpDrive solid state	storage	cards.

HARDWARE
     The mps driver supports the following controllers:

     o	 LSI Logic SAS2004 (4 Port SAS)
     o	 LSI Logic SAS2008 (8 Port SAS)
     o	 LSI Logic SAS2108 (8 Port SAS)
     o	 LSI Logic SAS2116 (16 Port SAS)
     o	 LSI Logic SAS2208 (8 Port SAS)

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 follow-
     ing 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:
     o	 No userland utility available (e.g.  mptutil(8)).
     o	 The driver probes devices sequentially.  If your system has a large
	 number	of devices, the	probe will take	a while.

BSD				 June 30, 2012				   BSD
NAME | SYNOPSIS | DESCRIPTION | HARDWARE | CONFIGURATION | DEBUGGING | SEE ALSO | HISTORY | AUTHORS | BUGS

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