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NAME

     msk - Marvell/SysKonnect Yukon II Gigabit Ethernet adapter driver

SYNOPSIS

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

           device miibus
           device msk

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

           if_msk_load="YES"

DESCRIPTION

     The msk device driver provides support for various NICs based on the
     Marvell/SysKonnect Yukon II Gigabit Ethernet controller chip.

     All NICs supported by the msk driver have TCP/UDP/IP checksum offload for
     transmit, TCP segmentation offload (TSO), hardware VLAN tag
     stripping/insertion features and an interrupt moderation mechanism as
     well as a 64-bit multicast hash filter.  The Yukon II supports TBI (ten
     bit interface) and GMII transceivers, which means it can be used with
     either copper or 1000baseX fiber applications.

     The Yukon II also supports Jumbo Frames (up to 9022 bytes), which can be
     configured via the interface MTU setting.  Selecting an MTU larger than
     1500 bytes with the ifconfig(8) utility configures the adapter to receive
     and transmit Jumbo Frames.

     The msk driver supports the following media types:

     autoselect   Enable autoselection of the media type and options.  The
                  user can manually override the autoselected mode by adding
                  media options to rc.conf(5).

     10baseT/UTP  Set 10Mbps operation.  The ifconfig(8) mediaopt option can
                  also be used to select either full-duplex or half-duplex
                  modes.

     100baseTX    Set 100Mbps (Fast Ethernet) operation.  The ifconfig(8)
                  mediaopt option can also be used to select either
                  full-duplex or half-duplex modes.

     1000baseTX   Set 1000baseTX operation over twisted pair.  The ifconfig(8)
                  mediaopt option can also be used to select either
                  full-duplex or half-duplex modes.

     1000baseSX   Set 1000Mbps (Gigabit Ethernet) operation.  Both full-duplex
                  and half-duplex modes are supported.

     The msk driver supports the following media options:

     full-duplex  Force full duplex operation.

     half-duplex  Force half duplex operation.

     The msk driver also supports one special link option for 1000baseTX
     cards:

     link0  With 1000baseTX cards, establishing a link between two ports
            requires that one port is configured as master and the other one
            as slave.  With autonegotiation, the master/slave settings will be
            chosen automatically.  However when manually selecting the link
            state, it is necessary to force one side of the link to be a
            master and the other a slave.  The msk driver configures the ports
            as slaves by default.  Setting the link0 flag with ifconfig(8)
            will set a port as a master instead.

     For more information on configuring this device, see ifconfig(8).

HARDWARE

     The msk driver provides support for various NICs based on the
     Marvell/SysKonnect Yukon II based Gigabit Ethernet controller chips,
     including:

     ·   D-Link 550SX Gigabit Ethernet
     ·   D-Link 560T Gigabit Ethernet
     ·   Marvell Yukon 88E8021CU Gigabit Ethernet
     ·   Marvell Yukon 88E8021 SX/LX Gigabit Ethernet
     ·   Marvell Yukon 88E8022CU Gigabit Ethernet
     ·   Marvell Yukon 88E8022 SX/LX Gigabit Ethernet
     ·   Marvell Yukon 88E8061CU Gigabit Ethernet
     ·   Marvell Yukon 88E8061 SX/LX Gigabit Ethernet
     ·   Marvell Yukon 88E8062CU Gigabit Ethernet
     ·   Marvell Yukon 88E8062 SX/LX Gigabit Ethernet
     ·   Marvell Yukon 88E8035 Gigabit Ethernet
     ·   Marvell Yukon 88E8036 Gigabit Ethernet
     ·   Marvell Yukon 88E8038 Gigabit Ethernet
     ·   Marvell Yukon 88E8039 Gigabit Ethernet
     ·   Marvell Yukon 88E8050 Gigabit Ethernet
     ·   Marvell Yukon 88E8052 Gigabit Ethernet
     ·   Marvell Yukon 88E8053 Gigabit Ethernet
     ·   Marvell Yukon 88E8055 Gigabit Ethernet
     ·   Marvell Yukon 88E8056 Gigabit Ethernet
     ·   Marvell Yukon 88E8058 Gigabit Ethernet
     ·   SysKonnect SK-9Sxx Gigabit Ethernet
     ·   SysKonnect SK-9Exx Gigabit Ethernet

LOADER TUNABLES

     Tunables can be set at the loader(8) prompt before booting the kernel or
     stored in loader.conf(5).

     hw.msk.msi_disable
             This tunable disables MSI support on the Ethernet hardware.  The
             default value is 0.

SYSCTL VARIABLES

     The following variables are available as both sysctl(8) variables and
     loader(8) tunables:

     dev.mskc.%d.process_limit
             Maximum amount of Rx events to be processed in the event loop
             before rescheduling a taskqueue.  The accepted range is 30 to
             256, the default value is 128 events.  The interface does not
             need to be brought down and up again before a change takes
             effect.

SEE ALSO

     altq(4), arp(4), miibus(4), netintro(4), ng_ether(4), vlan(4),
     ifconfig(8)

HISTORY

     The msk driver was written by Pyun YongHyeon 〈yongari@FreeBSD.org〉 and it
     is based on sk(4) and Marvell’s FreeBSD driver.  It first appeared in
     FreeBSD 7.0 and FreeBSD 6.3.