jme man page on FreeBSD

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JME(4)			 BSD Kernel Interfaces Manual			JME(4)

NAME
     jme — JMicron Gigabit/Fast Ethernet driver

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

	   device miibus
	   device jme

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

	   if_jme_load="YES"

DESCRIPTION
     The jme device driver provides support for JMicron JMC250 PCI Express
     Gigabit Ethernet controllers and JMicron JMC260 PCI Express Fast Ethernet
     controllers.

     All LOMs supported by the jme driver have TCP/UDP/IP checksum offload for
     both transmit and receive, TCP segmentation offload (TSO), hardware VLAN
     tag stripping/insertion features, Wake On Lan (WOL) and an interrupt coa‐
     lescing/moderation mechanism as well as a 64-bit multicast hash filter.

     The JMC250 also supports Jumbo Frames (up to 9216 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 jme 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.

     100baseTX	  Set 100Mbps (Fast Ethernet) operation.

     1000baseTX	  Set 1000baseTX operation over twisted pair.

     The jme driver supports the following media options:

     full-duplex  Force full duplex operation.

     half-duplex  Force half duplex operation.

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

HARDWARE
     The jme device driver provides support for the following Ethernet con‐
     trollers:

     ·	 JMicron JMC250 PCI Express Gigabit Ethernet controller
     ·	 JMicron JMC260 PCI Express Fast Ethernet controller

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

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

     hw.jme.msix_disable
	     This tunable disables MSI-X 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.jme.%d.tx_coal_to
	     Maximum amount of time to delay for Tx completion interrupt in
	     units of 1us.  The accepted range is 1 to 65535, the default is
	     100 (100us).

     dev.jme.%d.tx_coal_pkt
	     Maximum number of packets to fire Tx completion interrupt.	 The
	     accepted range is 1 to 255, the default is 8.

     dev.jme.%d.rx_coal_to
	     Maximum amount of time to delay for Rx completion interrupt in
	     units of 1us.  The accepted range is 1 to 65535, the default is
	     100 (100us).

     dev.jme.%d.rx_coal_pkt
	     Maximum number of packets to fire Rx completion interrupt.	 The
	     accepted range is 1 to 255, the default is 2.

     dev.jme.%d.process_limit
	     Maximum amount of Rx events to be processed in the event loop
	     before rescheduling a taskqueue.  The accepted range is 10 to
	     255, 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 jme driver was written by Pyun YongHyeon ⟨yongari@FreeBSD.org⟩.  It
     first appeared in FreeBSD 7.1.

BSD				October 6, 2008				   BSD
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