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man:sk98lin

SK98LIN(4) Linux Programmer's Manual SK98LIN(4)

NAME

     sk98lin - Marvell/SysKonnect Gigabit Ethernet driver v6.21

SYNOPSIS

     insmod       sk98lin.o       [Speed_A=i,j,...]        [Speed_B=i,j,...]
     [AutoNeg_A=i,j,...]   [AutoNeg_B=i,j,...]   [DupCap_A=i,j,...]    [Dup-
     Cap_B=i,j,...]         [FlowCtrl_A=i,j,...]        [FlowCtrl_B=i,j,...]
     [Role_A=i,j,...]    [Role_B=i,j,...]     [ConType=i,j,...]     [Modera-
     tion=i,j,...]     [IntsPerSec=i,j,...]     [PrefPort=i,j,...]    [Rlmt-
     Mode=i,j,...]

DESCRIPTION

     Note: This obsolete driver was removed from the kernel in version
     2.6.26.
     sk98lin is the Gigabit Ethernet driver for Marvell and SysKonnect
     network adapter cards.  It supports SysKonnect SK-98xx/SK-95xx
     compliant Gigabit Ethernet Adapter and any Yukon compliant chipset.
     When loading the driver using insmod, parameters for the network
     adapter cards might be stated as a sequence of comma separated
     commands.  If for instance two network adapters are installed and
     AutoNegotiation on Port A of the first adapter should be ON, but on the
     Port A of the second adapter switched OFF, one must enter:
        insmod sk98lin.o AutoNeg_A=On,Off
     After sk98lin is bound to one or more adapter cards and the /proc
     filesystem is mounted on your system, a dedicated statistics file will
     be created in the folder /proc/net/sk98lin for all ports of the
     installed network adapter cards.  Those files are named eth[x], where x
     is the number of the interface that has been assigned to a dedicated
     port by the system.
     If loading is finished, any desired IP address can be assigned to the
     respective eth[x] interface using the ifconfig(8) command.  This causes
     the adapter to connect to the Ethernet and to display a status message
     on the console saying "ethx: network connection up using port y"
     followed by the configured or detected connection parameters.
     The sk98lin also supports large frames (also called jumbo frames).
     Using jumbo frames can improve throughput tremendously when
     transferring large amounts of data.  To enable large frames, the MTU
     (maximum transfer unit) size for an interface is to be set to a high
     value.  The default MTU size is 1500 and can be changed up to 9000
     (bytes).  Setting the MTU size can be done when assigning the IP
     address to the interface or later by using the ifconfig(8) command with
     the mtu parameter.  If for instance eth0 needs an IP address and a
     large frame MTU size, the following two commands might be used:
         ifconfig eth0 10.1.1.1
         ifconfig eth0 mtu 9000
     Those two commands might even be combined into one:
         ifconfig eth0 10.1.1.1 mtu 9000
     Note that large frames can be used only if permitted by your network
     infrastructure.  This means, that any switch being used in your
     Ethernet must also support large frames.  Quite some switches support
     large frames, but need to be configured to do so.  Most of the times,
     their default setting is to support only standard frames with an MTU
     size of 1500 (bytes).  In addition to the switches inside the network,
     all network adapters that are to be used must also be enabled regarding
     jumbo frames.  If an adapter is not set to receive large frames, it
     will simply drop them.
     Switching back to the standard Ethernet frame size can be done by using
     the ifconfig(8) command again:
         ifconfig eth0 mtu 1500
     The Marvell/SysKonnect Gigabit Ethernet driver for Linux is able to
     support VLAN and Link Aggregation according to IEEE standards 802.1,
     802.1q, and 802.3ad.  Those features are available only after
     installation of open source modules which can be found on the Internet:
     VLAN:
     Link Aggregation:
     Note that Marvell/SysKonnect does not offer any support for these open
     source modules and does not take the responsibility for any kind of
     failures or problems arising when using these modules.
 Parameters
     Speed_A=i,j,...
            This parameter is used to set the speed capabilities of port A
            of an adapter card.  It is valid only for Yukon copper adapters.
            Possible values are: 10, 100, 1000, or Auto; Auto is the
            default.  Usually, the speed is negotiated between the two ports
            during link establishment.  If this fails, a port can be forced
            to a specific setting with this parameter.
     Speed_B=i,j,...
            This parameter is used to set the speed capabilities of port B
            of an adapter card.  It is valid only for Yukon copper adapters.
            Possible values are: 10, 100, 1000, or Auto; Auto is the
            default.  Usually, the speed is negotiated between the two ports
            during link establishment.  If this fails, a port can be forced
            to a specific setting with this parameter.
     AutoNeg_A=i,j,...
            Enables or disables the use of autonegotiation of port A of an
            adapter card.  Possible values are: On, Off, or Sense; On is the
            default.  The Sense mode automatically detects whether the link
            partner supports auto-negotiation or not.
     AutoNeg_B=i,j,...
            Enables or disables the use of autonegotiation of port B of an
            adapter card.  Possible values are: On, Off, or Sense; On is the
            default.  The Sense mode automatically detects whether the link
            partner supports auto-negotiation or not.
     DupCap_A=i,j,...
            This parameter indicates the duplex mode to be used for port A
            of an adapter card.  Possible values are: Half, Full, or Both;
            Both is the default.  This parameter is relevant only if
            AutoNeg_A of port A is not set to Sense.  If AutoNeg_A is set to
            On, all three values of DupCap_A ( Half, Full or Both) might be
            stated.  If AutoNeg_A is set to Off, only DupCap_A values Full
            and Half are allowed.  This DupCap_A parameter is useful if your
            link partner does not support all possible duplex combinations.
     DupCap_B=i,j,...
            This parameter indicates the duplex mode to be used for port B
            of an adapter card.  Possible values are: Half, Full, or Both;
            Both is the default.  This parameter is relevant only if
            AutoNeg_B of port B is not set to Sense.  If AutoNeg_B is set to
            On, all three values of DupCap_B ( Half, Full or Both) might be
            stated.  If AutoNeg_B is set to Off, only DupCap_B values Full
            and Half are allowed.  This DupCap_B parameter is useful if your
            link partner does not support all possible duplex combinations.
     FlowCtrl_A=i,j,...
            This parameter can be used to set the flow control capabilities
            the port reports during auto-negotiation.  Possible values are:
            Sym, SymOrRem, LocSend, or None; SymOrRem is the default.  The
            different modes have the following meaning:
            Sym = Symmetric
             both link partners are allowed to send PAUSE frames
            SymOrRem = SymmetricOrRemote
             both or only remote partner are allowed to send PAUSE frames
            LocSend = LocalSend
             only local link partner is allowed to send PAUSE frames
            None = None
             no link partner is allowed to send PAUSE frames
            Note that this parameter is ignored if AutoNeg_A is set to Off.
     FlowCtrl_B=i,j,...
            This parameter can be used to set the flow control capabilities
            the port reports during auto-negotiation.  Possible values are:
            Sym, SymOrRem, LocSend, or None; SymOrRem is the default.  The
            different modes have the following meaning:
            Sym = Symmetric
             both link partners are allowed to send PAUSE frames
            SymOrRem = SymmetricOrRemote
             both or only remote partner are allowed to send PAUSE frames
            LocSend = LocalSend
             only local link partner is allowed to send PAUSE frames
            None = None
             no link partner is allowed to send PAUSE frames
            Note that this parameter is ignored if AutoNeg_B is set to Off.
     Role_A=i,j,...
            This parameter is valid only for 1000Base-T adapter cards.  For
            two 1000Base-T ports to communicate, one must take the role of
            the master (providing timing information), while the other must
            be the slave.  Possible values are: Auto, Master, or Slave; Auto
            is the default.  Usually, the role of a port is negotiated
            between two ports during link establishment, but if that fails
            the port A of an adapter card can be forced to a specific
            setting with this parameter.
     Role_B=i,j,...
            This parameter is valid only for 1000Base-T adapter cards.  For
            two 1000Base-T ports to communicate, one must take the role of
            the master (providing timing information), while the other must
            be the slave.  Possible values are: Auto, Master, or Slave; Auto
            is the default.  Usually, the role of a port is negotiated
            between two ports during link establishment, but if that fails
            the port B of an adapter card can be forced to a specific
            setting with this parameter.
     ConType=i,j,...
            This parameter is a combination of all five per-port parameters
            within one single parameter.  This simplifies the configuration
            of both ports of an adapter card.  The different values of this
            variable reflect the most meaningful combinations of port
            parameters.  Possible values and their corresponding combination
            of per-port parameters:
            ConType | DupCap   AutoNeg   FlowCtrl   Role   Speed
            --------+-------------------------------------------
            Auto    |  Both      On      SymOrRem   Auto   Auto
            100FD   |  Full      Off       None     Auto   100
            100HD   |  Half      Off       None     Auto   100
            10FD    |  Full      Off       None     Auto   10
            10HD    |  Half      Off       None     Auto   10
            Stating any other port parameter together with this ConType
            parameter will result in a merged configuration of those
            settings.  This is due to the fact, that the per-port parameters
            (e.g., Speed_A) have a higher priority than the combined
            variable ConType.
     Moderation=i,j,...
            Interrupt moderation is employed to limit the maximum number of
            interrupts the driver has to serve.  That is, one or more
            interrupts (which indicate any transmit or receive packet to be
            processed) are queued until the driver processes them.  When
            queued interrupts are to be served, is determined by the
            IntsPerSec parameter, which is explained later below.  Possible
            moderation modes are: None, Static, or Dynamic; None is the
            default.  The different modes have the following meaning:
            None No interrupt moderation is applied on the adapter card.
            Therefore, each transmit or receive interrupt is served
            immediately as soon as it appears on the interrupt line of the
            adapter card.
            Static Interrupt moderation is applied on the adapter card.  All
            transmit and receive interrupts are queued until a complete
            moderation interval ends.  If such a moderation interval ends,
            all queued interrupts are processed in one big bunch without any
            delay.  The term Static reflects the fact, that interrupt
            moderation is always enabled, regardless how much network load
            is currently passing via a particular interface.  In addition,
            the duration of the moderation interval has a fixed length that
            never changes while the driver is operational.
            Dynamic Interrupt moderation might be applied on the adapter
            card, depending on the load of the system.  If the driver
            detects that the system load is too high, the driver tries to
            shield the system against too much network load by enabling
            interrupt moderation.  If--at a later time--the CPU utilization
            decreases again (or if the network load is negligible), the
            interrupt moderation will automatically be disabled.
            Interrupt moderation should be used when the driver has to
            handle one or more interfaces with a high network load, which--
            as a consequence--leads also to a high CPU utilization.  When
            moderation is applied in such high network load situations, CPU
            load might be reduced by 20-30% on slow computers.
            Note that the drawback of using interrupt moderation is an
            increase of the round-trip-time (RTT), due to the queuing and
            serving of interrupts at dedicated moderation times.
     IntsPerSec=i,j,...
            This parameter determines the length of any interrupt moderation
            interval.  Assuming that static interrupt moderation is to be
            used, an IntsPerSec parameter value of 2000 will lead to an
            interrupt moderation interval of 500 microseconds.  Possible
            values for this parameter are in the range of 30...40000
            (interrupts per second).  The default value is 2000.
            This parameter is used only if either static or dynamic
            interrupt moderation is enabled on a network adapter card.  This
            parameter is ignored if no moderation is applied.
            Note that the duration of the moderation interval is to be
            chosen with care.  At first glance, selecting a very long
            duration (e.g., only 100 interrupts per second) seems to be
            meaningful, but the increase of packet-processing delay is
            tremendous.  On the other hand, selecting a very short
            moderation time might compensate the use of any moderation being
            applied.
     PrefPort=i,j,...
            This parameter is used to force the preferred port to A or B (on
            dual-port network adapters).  The preferred port is the one that
            is used if both ports A and B are detected as fully functional.
            Possible values are: A or B; A is the default.
     RlmtMode=i,j,...
            RLMT monitors the status of the port.  If the link of the active
            port fails, RLMT switches immediately to the standby link.  The
            virtual link is maintained as long as at least one "physical"
            link is up.  This parameters states how RLMT should monitor both
            ports.  Possible values are: CheckLinkState, CheckLocalPort,
            CheckSeg, or DualNet; CheckLinkState is the default.  The
            different modes have the following meaning:
            CheckLinkState Check link state only: RLMT uses the link state
            reported by the adapter hardware for each individual port to
            determine whether a port can be used for all network traffic or
            not.
            CheckLocalPort In this mode, RLMT monitors the network path
            between the two ports of an adapter by regularly exchanging
            packets between them.  This mode requires a network
            configuration in which the two ports are able to "see" each
            other (i.e., there must not be any router between the ports).
            CheckSeg Check local port and segmentation: This mode supports
            the same functions as the CheckLocalPort mode and additionally
            checks network segmentation between the ports.  Therefore, this
            mode is to be used only if Gigabit Ethernet switches are
            installed on the network that have been configured to use the
            Spanning Tree protocol.
            DualNet In this mode, ports A and B are used as separate
            devices.  If you have a dual port adapter, port A will be
            configured as eth[x] and port B as eth[x+1].  Both ports can be
            used independently with distinct IP addresses.  The preferred
            port setting is not used.  RLMT is turned off.
            Note that RLMT modes CheckLocalPort and CheckLinkState are
            designed to operate in configurations where a network path
            between the ports on one adapter exists.  Moreover, they are not
            designed to work where adapters are connected back-to-back.

FILES

     /proc/net/sk98lin/eth[x]
            The statistics file of a particular interface of an adapter
            card.  It contains generic information about the adapter card
            plus a detailed summary of all transmit and receive counters.
     /usr/src/linux/Documentation/networking/sk98lin.txt
            This is the README file of the sk98lin driver.  It contains a
            detailed installation HOWTO and describes all parameters of the
            driver.  It denotes also common problems and provides the
            solution to them.

BUGS

     Report any bugs to linux@syskonnect.de

SEE ALSO

     ifconfig(8), insmod(8), modprobe(8)

COLOPHON

     This page is part of release 4.16 of the Linux man-pages project.  A
     description of the project, information about reporting bugs, and the
     latest version of this page, can be found at
     https://www.kernel.org/doc/man-pages/.

Linux 2017-09-15 SK98LIN(4)

/data/webs/external/dokuwiki/data/pages/man/sk98lin.txt · Last modified: 2019/05/17 09:47 by 127.0.0.1

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