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

NAME
     mpr - LSI Fusion-MPT 3/3.5 IT/IR 12Gb/s Serial Attached SCSI/SATA/PCIe
     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 3/3.5 IT/IR SAS/PCIe controllers.

HARDWARE
     These controllers are supported by the mpr driver:

        Broadcom Ltd./Avago Tech (LSI) SAS 3004 (4 Port SAS)
        Broadcom Ltd./Avago Tech (LSI) SAS 3008 (8 Port SAS)
        Broadcom Ltd./Avago Tech (LSI) SAS 3108 (8 Port SAS)
        Broadcom Ltd./Avago Tech (LSI) SAS 3216 (16 Port SAS)
        Broadcom Ltd./Avago Tech (LSI) SAS 3224 (24 Port SAS)
        Broadcom Ltd./Avago Tech (LSI) SAS 3316 (16 Port SAS)
        Broadcom Ltd./Avago Tech (LSI) SAS 3324 (24 Port SAS)
        Broadcom Ltd./Avago Tech (LSI) SAS 3408 (8 Port SAS/PCIe)
        Broadcom Ltd./Avago Tech (LSI) SAS 3416 (16 Port SAS/PCIe)
        Broadcom Ltd./Avago Tech (LSI) SAS 3508 (8 Port SAS/PCIe)
        Broadcom Ltd./Avago Tech (LSI) SAS 3516 (16 Port SAS/PCIe)
        Broadcom Ltd./Avago Tech (LSI) SAS 3616 (16 Port SAS/PCIe)
        Broadcom Ltd./Avago Tech (LSI) SAS 3708 (8 Port SAS/PCIe)
        Broadcom Ltd./Avago Tech (LSI) SAS 3716 (16 Port SAS/PCIe)

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
     tunable 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.

     The current number of free PRP pages is stored in the
     dev.mpr.X.prp_pages_free sysctl(8) variable.  PRP pages are used by NVMe
     devices for I/O transfers, much like Scatter/Gather lists.

     The lowest number of free PRP pages seen since boot is stored in the
     dev.mpr.X.prp_pages_free_lowwater sysctl(8) variable.

     The number of times that PRP page allocations have failed since boot is
     stored in the dev.mpr.X.prp_page_alloc_fail 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
     specific 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
     maximum 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
     setting 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
     powering 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 this 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 as when setting this tunable for all
     adapters.

     SATA disks that take several seconds to spin up and fail the SATA
     Identify 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.

     The driver can map devices discovered by the adapter so that target IDs
     corresponding to a specific device persist across resets and reboots.  In
     some cases it is possible for devices to lose their mapped IDs due to
     unexpected behavior from certain hardware, such as some types of
     enclosures.  To overcome this problem, a tunable is provided that will
     force the driver to map devices using the Phy number associated with the
     device.  This feature is not recommended if the topology includes
     multiple enclosures/expanders.  If multiple enclosures/expanders are
     present in the topology, Phy numbers are repeated, causing all devices at
     these Phy numbers except the first device to fail enumeration.  To
     control this feature for all adapters, set the

           hw.mpr.use_phy_num

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

           -1      Only use Phy numbers to map devices and bypass the driver's
                   mapping logic.

           0       Never use Phy numbers to map devices.

           1       Use Phy numbers to map devices, but only if the driver's
                   mapping logic fails to map the device that is being
                   enumerated.  This is the default value.

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

           dev.mpr.X.use_phy_num

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

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 <[email protected]>.
     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 <[email protected]> with additional
     input from Stephen McConnell <[email protected]>.

FreeBSD 11.1-RELEASE-p4          May 25, 2017          FreeBSD 11.1-RELEASE-p4
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