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-'\" t
-.\" (C)Copyright 1999-2003 Marvell(R) -- linux@syskonnect.de
-.\" sk98lin.4 1.1 2003/12/17 10:03:18
-.\"
-.\" SPDX-License-Identifier: GPL-2.0-or-later
-.\"
-.\" This manpage can be viewed using `groff -Tascii -man sk98lin.4 | less`
-.\"
-.TH sk98lin 4 2023-10-31 "Linux man-pages 6.7"
-.SH NAME
-sk98lin \- Marvell/SysKonnect Gigabit Ethernet driver v6.21
-.SH SYNOPSIS
-.B insmod sk98lin.o
-.RB [ Speed_A=\c
-.IR i,j,... ]
-.RB [ Speed_B=\c
-.IR i,j,... ]
-.RB [ AutoNeg_A=\c
-.IR i,j,... ]
-.RB [ AutoNeg_B=\c
-.IR i,j,... ]
-.RB [ DupCap_A=\c
-.IR i,j,... ]
-.RB [ DupCap_B=\c
-.IR i,j,... ]
-.RB [ FlowCtrl_A=\c
-.IR i,j,... ]
-.RB [ FlowCtrl_B=\c
-.IR i,j,... ]
-.RB [ Role_A=\c
-.IR i,j,... ]
-.RB [ Role_B=\c
-.IR i,j,... ]
-.RB [ ConType=\c
-.IR i,j,... ]
-.RB [ Moderation=\c
-.IR i,j,... ]
-.RB [ IntsPerSec=\c
-.IR i,j,... ]
-.RB [ PrefPort=\c
-.IR i,j,... ]
-.RB [ RlmtMode=\c
-.IR i,j,... ]
-.SH DESCRIPTION
-.ad l
-.hy 0
-.BR Note :
-This obsolete driver was removed in Linux 2.6.26.
-.P
-.B 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.
-.P
-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:
-.P
-.in +4n
-.EX
-insmod sk98lin.o AutoNeg_A=On,Off
-.EE
-.in
-.P
-After
-.B sk98lin
-is bound to one or more adapter cards and the
-.I /proc
-filesystem is mounted on your system, a dedicated statistics file
-will be created in the folder
-.I /proc/net/sk98lin
-for all ports of the installed network adapter cards.
-Those files are named
-.IR eth[x] ,
-where
-.I x
-is the number of the interface that has been assigned to a
-dedicated port by the system.
-.P
-If loading is finished, any desired IP address can be
-assigned to the respective
-.I eth[x]
-interface using the
-.BR 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.
-.P
-The
-.B 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
-.BR 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:
-.P
-.in +4n
-.EX
-ifconfig eth0 10.1.1.1
-ifconfig eth0 mtu 9000
-.EE
-.in
-.P
-Those two commands might even be combined into one:
-.P
-.in +4n
-.EX
-ifconfig eth0 10.1.1.1 mtu 9000
-.EE
-.in
-.P
-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.
-.P
-Switching back to the standard Ethernet frame size can be done by using the
-.BR ifconfig (8)
-command again:
-.P
-.in +4n
-.EX
-ifconfig eth0 mtu 1500
-.EE
-.in
-.P
-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:
-.P
-.IR VLAN :
-.UR http://www.candelatech.com\:/\[ti]greear\:/vlan.html
-.UE
-.br
-.I Link
-.IR Aggregation :
-.UR http://www.st.rim.or.jp\:/\[ti]yumo
-.UE
-.P
-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.
-.SS Parameters
-.TP
-.BI 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:
-.IR 10 ,
-.IR 100 ,
-.IR 1000 ,
-or
-.IR Auto ;
-.I 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.
-.TP
-.BI 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:
-.IR 10 ,
-.IR 100 ,
-.IR 1000 ,
-or
-.IR Auto ;
-.I 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.
-.TP
-.BI AutoNeg_A= i,j,...
-Enables or disables the use of autonegotiation of port A of an adapter card.
-Possible values are:
-.IR On ,
-.IR Off ,
-or
-.IR Sense ;
-.I On
-is the default.
-The
-.I Sense
-mode automatically detects whether the link partner supports
-auto-negotiation or not.
-.TP
-.BI AutoNeg_B= i,j,...
-Enables or disables the use of autonegotiation of port B of an adapter card.
-Possible values are:
-.IR On ,
-.IR Off ,
-or
-.IR Sense ;
-.I On
-is the default.
-The
-.I Sense
-mode automatically detects whether the link partner supports
-auto-negotiation or not.
-.TP
-.BI DupCap_A= i,j,...
-This parameter indicates the duplex mode to be used for port A
-of an adapter card.
-Possible values are:
-.IR Half ,
-.IR Full ,
-or
-.IR Both ;
-.I Both
-is the default.
-This parameter is relevant only if AutoNeg_A of port A is not set to
-.IR Sense .
-If AutoNeg_A is set to
-.IR On ,
-all three values of DupCap_A (
-.IR Half ,
-.IR Full ,
-or
-.IR Both )
-might be stated.
-If AutoNeg_A is set to
-.IR Off ,
-only DupCap_A values
-.I Full
-and
-.I Half
-are allowed.
-This DupCap_A parameter is useful if your link partner does not
-support all possible duplex combinations.
-.TP
-.BI DupCap_B= i,j,...
-This parameter indicates the duplex mode to be used for port B
-of an adapter card.
-Possible values are:
-.IR Half ,
-.IR Full ,
-or
-.IR Both ;
-.I Both
-is the default.
-This parameter is relevant only if AutoNeg_B of port B is not set to
-.IR Sense .
-If AutoNeg_B is set to
-.IR On ,
-all three values of DupCap_B (
-.IR Half ,
-.IR Full ,
-or
-.IR Both )
-might be stated.
-If AutoNeg_B is set to
-.IR Off ,
-only DupCap_B values
-.I Full
-and
-.I Half
-are allowed.
-This DupCap_B parameter is useful if your link partner does not
-support all possible duplex combinations.
-.TP
-.BI FlowCtrl_A= i,j,...
-This parameter can be used to set the flow control capabilities the
-port reports during auto-negotiation.
-Possible values are:
-.IR Sym ,
-.IR SymOrRem ,
-.IR LocSend ,
-or
-.IR None ;
-.I SymOrRem
-is the default.
-The different modes have the following meaning:
-.RS
-.TP
-.IR Sym " = Symmetric"
-Both link partners are allowed to send PAUSE frames.
-.TP
-.IR SymOrRem " = SymmetricOrRemote"
-Both or only remote partner are allowed to send PAUSE frames.
-.TP
-.IR LocSend " = LocalSend"
-Only local link partner is allowed to send PAUSE frames.
-.TP
-.IR None " = None"
-No link partner is allowed to send PAUSE frames.
-.RE
-.IP
-Note that this parameter is ignored if AutoNeg_A is set to
-.IR Off .
-.TP
-.BI FlowCtrl_B= i,j,...
-This parameter can be used to set the flow control capabilities the
-port reports during auto-negotiation.
-Possible values are:
-.IR Sym ,
-.IR SymOrRem ,
-.IR LocSend ,
-or
-.IR None ;
-.I SymOrRem
-is the default.
-The different modes have the following meaning:
-.RS
-.TP
-.IR Sym " = Symmetric"
-Both link partners are allowed to send PAUSE frames.
-.TP
-.IR SymOrRem " = SymmetricOrRemote"
-Both or only remote partner are allowed to send PAUSE frames.
-.TP
-.IR LocSend " = LocalSend"
-Only local link partner is allowed to send PAUSE frames.
-.TP
-.IR None " = None"
-No link partner is allowed to send PAUSE frames.
-.RE
-.IP
-Note that this parameter is ignored if AutoNeg_B is set to
-.IR Off .
-.TP
-.BI 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:
-.IR Auto ,
-.IR Master ,
-or
-.IR Slave ;
-.I 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.
-.TP
-.BI 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:
-.IR Auto ,
-.IR Master ,
-or
-.IR Slave ;
-.I 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.
-.TP
-.BI 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:
-.IP
-.TS
-lb lb lb lb lb lb
-l l l l l l.
-ConType	DupCap	AutoNeg	FlowCtrl	Role	Speed
-\fIAuto\fP	Both	On	SymOrRem	Auto	Auto
-\fI100FD\fP	Full	Off	None	Auto	100
-\fI100HD\fP	Half	Off	None	Auto	100
-\fI10FD\fP	Full	Off	None	Auto	10
-\fI10HD\fP	Half	Off	None	Auto	10
-.TE
-.IP
-Stating any other port parameter together with this
-.I ConType
-parameter will result in a merged configuration of those settings.
-This is due to
-the fact, that the per-port parameters (e.g.,
-.IR Speed_A )
-have a higher priority than the combined variable
-.IR ConType .
-.TP
-.BI 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
-.I IntsPerSec
-parameter, which is explained later below.
-Possible moderation modes are:
-.IR None ,
-.IR Static ,
-or
-.IR Dynamic ;
-.I None
-is the default.
-The different modes have the following meaning:
-.IP
-.I 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.
-.IP
-.I 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
-.I 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.
-.IP
-.I 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\[em]at a later time\[em]the CPU utilization decreases
-again (or if the network load is negligible), the interrupt
-moderation will automatically be disabled.
-.IP
-Interrupt moderation should be used when the driver has to
-handle one or more interfaces with a high network load,
-which\[em]as a consequence\[em]leads also to a high CPU utilization.
-When moderation is applied in such high network load situations,
-CPU load might be reduced by 20\[en]30% on slow computers.
-.IP
-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.
-.TP
-.BI IntsPerSec= i,j,...
-This parameter determines the length of any interrupt moderation interval.
-Assuming that static interrupt moderation is to be used, an
-.I 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.
-.IP
-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.
-.IP
-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.
-.TP
-.BI 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:
-.I A
-or
-.IR B ;
-.I A
-is the default.
-.TP
-.BI 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:
-.IR CheckLinkState ,
-.IR CheckLocalPort ,
-.IR CheckSeg ,
-or
-.IR DualNet ;
-.I CheckLinkState
-is the default.
-The different modes have the following meaning:
-.IP
-.I 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.
-.IP
-.I 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).
-.IP
-.I 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.
-.IP
-.I 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
-.I eth[x]
-and port B as
-.IR eth[x+1] .
-Both ports can be used independently with distinct IP addresses.
-The preferred port setting is not used.
-RLMT is turned off.
-.IP
-Note that RLMT modes
-.I CheckLocalPort
-and
-.I 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.
-.SH FILES
-.TP
-.I /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.
-.TP
-.I /usr/src/linux/Documentation/networking/sk98lin.txt
-This is the
-.I README
-file of the
-.I 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.
-.SH BUGS
-Report any bugs to linux@syskonnect.de
-.\" .SH AUTHORS
-.\" Ralph Roesler \[em] rroesler@syskonnect.de
-.\" .br
-.\" Mirko Lindner \[em] mlindner@syskonnect.de
-.SH SEE ALSO
-.BR ifconfig (8),
-.BR insmod (8),
-.BR modprobe (8)