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mxge (4)
  • >> mxge (4) ( FreeBSD man: Специальные файлы /dev/* )

  • BSD mandoc
     

    NAME

    
    
    mxge
    
     - Myricom Myri10GE 10 Gigabit Ethernet adapter driver
    
     
    

    SYNOPSIS

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

    Alternatively, to load the driver as a module at boot time, place the following lines in loader.conf5:

    if_mxge_load="YES"
    mxge_ethp_z8e_load="YES"
    mxge_eth_z8e_load="YES"
    mxge_rss_ethp_z8e_load="YES"
    mxge_rss_eth_z8e_load="YES"
    
     

    DESCRIPTION

    The driver provides support for PCI Express 10 Gigabit Ethernet adapters based on the Myricom LANai Z8E chip. The driver supports Transmit/Receive checksum offload, Jumbo Frames, TCP segmentation offload (TSO) as well as Large Receive Offload (LRO). For further hardware information, see http://www.myri.com/

    For questions related to hardware requirements, refer to the documentation supplied with your Myri10GE adapter. All hardware requirements listed apply to use with Fx .

    Support for Jumbo Frames is provided 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 maximum MTU size for Jumbo Frames is 9000.

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

    HARDWARE

    The driver supports 10 Gigabit Ethernet adapters based on the Myricom LANai Z8E chips:

     

    LOADER TUNABLES

    Tunables can be set at the loader(8) prompt before booting the kernel or stored in loader.conf5.

    hw.mxge.flow_control_enabled
    Whether or not hardware flow control is enabled on the adapter. The default value is 1.
    hw.mxge.intr_coal_delay
    This value delays the generation of all interrupts in units of 1 microsecond. The default value is 30.
    hw.mxge.skip_pio_read
    This value determines whether or not the driver may omit doing a PIO read in the interrupt handler which ensures that the interrupt line has been deasserted when using xPIC interrupts. A non-zero value may result in lower CPU overhead, however it may also result in spurious interrupts. The default value is 0. This tunable has no effect when the device is using MSI or MSI-X interrupts.
    hw.mxge.max_slices
    This value determines the maximum number of slices the driver will attempt to use. The default value is 1. A slice is comprised of a set of receive queues and an associated interrupt thread. When using multiple slices, the NIC hashes traffic to different slices based on the value of hw.mxge.rss_hash_type Using multiple slices requires that your motherboard and Myri10GE NIC both be capable of MSI-X. Older Myri10GE NICs can be field upgraded to add MSI-X using the "10G NIC Tool Kit" for FreeBSD which is available from http://www.myri.com/scs/download-10g-tools.html

    hw.mxge.rss_hash_type
    This value determines how incoming traffic is steered to different slices. This tunable is ignored when using just a single slice. The legal values for this tunable are:

    1
    Hash on the source and destination IPv4 addresses.
    2
    Hash on source and destination IPv4 addresses and if the packet is TCP, then also hash on the TCP source and destination ports.
    4
    Hash on the TCP or UDP source ports. This is the default value.

     

    DIAGNOSTICS

    "mxge%d: Unable to allocate bus resource: memory"
    A fatal initialization error has occurred.
    "mxge%d: Unable to allocate bus resource: interrupt"
    A fatal initialization error has occurred.
    "mxge%d: Could not find firmware image %s"
    The appropriate firmware kld module was not installed. This is a non-fatal initialization error, but will result in running in a reduced performance mode.

     

    SUPPORT

    For general information and support, go to the Myricom support website at: http://www.myri.com/scs/

    If an issue is identified with the released source code on the supported kernel with a supported adapter, email the specific information related to the issue to Aq [email protected] .  

    SEE ALSO

    altq(4), arp(4), netintro(4), ng_ether4, ifconfig(8)  

    HISTORY

    The device driver first appeared in Fx 6.3 .  

    AUTHORS

    The driver was written by An Andrew Gallatin Aq [email protected] .


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    HARDWARE
    LOADER TUNABLES
    DIAGNOSTICS
    SUPPORT
    SEE ALSO
    HISTORY
    AUTHORS


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