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MPR(4)		       FreeBSD Kernel Interfaces Manual			MPR(4)

NAME
     mpr -- LSI	Fusion-MPT 3 IT/IR 12Gb/s Serial Attached SCSI/SATA driver

SYNOPSIS
     To	compile	this driver into the kernel, place these lines in the kernel
     configuration file:

	   device pci
	   device scbus
	   device mpr

     The driver	can be loaded as a module at boot time by placing this line in
     loader.conf(5):

	   mpr_load="YES"

DESCRIPTION
     The mpr driver provides support for Broadcom Ltd./Avago Tech (LSI)
     Fusion-MPT	3 IT/IR	SAS controllers.

HARDWARE
     These controllers are supported by	the mpr	driver:

     +o	 Broadcom Ltd./Avago Tech (LSI)	SAS 3004 (4 Port SAS)
     +o	 Broadcom Ltd./Avago Tech (LSI)	SAS 3008 (8 Port SAS)
     +o	 Broadcom Ltd./Avago Tech (LSI)	SAS 3108 (8 Port SAS)
     +o	 Broadcom Ltd./Avago Tech (LSI)	SAS 3216 (16 Port SAS)
     +o	 Broadcom Ltd./Avago Tech (LSI)	SAS 3224 (24 Port SAS)

CONFIGURATION
     In	all tunable descriptions below,	X represents the adapter number.

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

	   hw.mpr.disable_msi=1

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

	   dev.mpr.X.disable_msi=1

     To	disable	MSI-X interrupts for all mpr driver instances, set this	tun-
     able value	in loader.conf(5):

	   hw.mpr.disable_msix=1

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

	   dev.mpr.X.disable_msix=1

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

	   hw.mpr.max_chains=NNNN

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

	   dev.mpr.X.max_chains=NNNN

     The default max_chains value is 2048.

     The current number	of free	chain frames is	stored in the
     dev.mpr.X.chain_free sysctl(8) variable.

     The lowest	number of free chain frames seen since boot is stored in the
     dev.mpr.X.chain_free_lowwater sysctl(8) variable.

     The number	of times that chain frame allocations have failed since	boot
     is	stored in the dev.mpr.X.chain_alloc_fail sysctl(8) variable.  This can
     be	used to	determine whether the max_chains tunable should	be increased
     to	help performance.

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

     To	set the	maximum	number of pages	that will be used per I/O for all
     adapters, set this	tunable	in loader.conf(5):

	   hw.mpr.max_io_pages=NNNN

     To	set the	maximum	number of pages	that will be used per I/O for a	spe-
     cific adapter, set	this tunable in	loader.conf(5):

	   dev.mpr.X.max_io_pages=NNNN

     The default max_io_pages value is -1, meaning that	the maximum I/O	size
     that will be used per I/O will be calculated using	the IOCFacts values
     stored in the controller.	The lowest value that the driver will use for
     max_io_pages is 1,	otherwise IOCFacts will	be used	to calculate the maxi-
     mum I/O size.  The	smaller	I/O size calculated from either	max_io_pages
     or	IOCFacts will be the maximum I/O size used by the driver.

     The highest number	of active I/O commands seen since boot is stored in
     the dev.mpr.X.io_cmds_highwater sysctl(8) variable.

     Devices can be excluded from mpr control for all adapters by setting this
     tunable in	loader.conf(5):

	   hw.mpr.exclude_ids=Y

     Y represents the target ID	of the device.	If more	than one device	is to
     be	excluded, target IDs are separated by commas.

     Devices can be excluded from mpr control for a specific adapter by	set-
     ting this tunable in loader.conf(5):

	   dev.mpr.X.exclude_ids=Y

     Y represents the target ID	of the device.	If more	than one device	is to
     be	excluded, target IDs are separated by commas.

     The adapter can issue the StartStopUnit SCSI command to SATA direct-
     access devices during shutdown.  This allows the device to	quiesce	power-
     ing down.	To control this	feature	for all	adapters, set the

	   hw.mpr.enable_ssu

     tunable in	loader.conf(5) to one of these values:

	   0	   Do not send SSU to either HDDs or SSDs.

	   1	   Send	SSU to SSDs, but not to	HDDs.  This is the default
		   value.

	   2	   Send	SSU to HDDs, but not to	SSDs.

	   3	   Send	SSU to both HDDs and SSDs.

     To	control	the feature for	a specific adapter, set	this tunable value in
     loader.conf(5):

	   dev.mpr.X.enable_ssu

     The same set of values are	valid when setting this	tunable	for all
     adapters.

     SATA disks	that take several seconds to spin up and fail the SATA Iden-
     tify command might	not be discovered by the driver.  This problem can
     sometimes be overcome by increasing the value of the spinup wait time in
     loader.conf(5) with the

	   hw.mpr.spinup_wait_time=NNNN

     tunable.  NNNN represents the number of seconds to	wait for SATA devices
     to	spin up	when the device	fails the initial SATA Identify	command.

     Spinup wait times can be set for specific adapters	in loader.conf(5):
     with the

	   dev.mpr.X.spinup_wait_time=NNNN

     tunable.  NNNN is the number of seconds to	wait for SATA devices to spin
     up	when they fail the initial SATA	Identify command.

DEBUGGING
     To	enable debugging prints	from the mpr driver, set the

	   hw.mpr.X.debug_level

     tunable, either in	loader.conf(5) or by using sysctl(8).  These bits have
     the described effects:

	   0x0001 Enable informational prints (set by default).
	   0x0002 Enable prints	for driver faults (set by default).
	   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 (IOCTL).
	   0x0200 Enable prints	for device mapping.
	   0x0400 Enable prints	for tracing through driver functions.

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

HISTORY
     The mpr driver first appeared in FreeBSD 9.3.

AUTHORS
     The mpr driver was	originally written by Scott Long <scottl@FreeBSD.org>.
     It	has been improved and tested by	LSI Corporation, Avago Technologies
     (formally LSI), and Broadcom Ltd. (formally Avago).

     This man page was written by Ken Merry <ken@FreeBSD.org> with additional
     input from	Stephen	McConnell <slm@FreeBSD.org>.

FreeBSD	11.1			 July 6, 2016			  FreeBSD 11.1

NAME | SYNOPSIS | DESCRIPTION | HARDWARE | CONFIGURATION | DEBUGGING | SEE ALSO | HISTORY | AUTHORS

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