NAME

     bxe — Broadcom BCM57710/BCM57711/BCM57711E 10Gb Ethernet adapter driver

SYNOPSIS

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

           device bxe

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

           if_bxe_load="YES"

DESCRIPTION

     The bxe driver provides support for PCIe 10GbE Ethernet adapters based on BCM5771x chips.
     The driver supports Jumbo Frames, VLAN tagging, IP, UDP and TCP checksum offload, MSI-X, TCP
     Segmentation Offload (TSO), Large Receive Offload (LRO), and Receive Side Steering (RSS).

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

HARDWARE

     The bxe driver provides support for various NICs based on the Broadcom BCM5771x family of
     10GbE Ethernet controller chips, including the following:

     •   Broadcom NetXtreme II BCM57710 10GbE
     •   Broadcom NetXtreme II BCM57711 10GbE
     •   Broadcom NetXtreme II BCM57711E 10GbE

SYSCTL VARIABLES

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

     hw.bxe.dcc_enable
             Enable HP Flex-10 support.  Allowed values are 0 to disable and 1 to enable.  The
             default value is 0.

     hw.bxe.tso_enable
             Enable TCP Segmentation Offload.  The default value is 1.

     hw.bxe.int_mode
             Set interrupt mode.  Allowed values are 0 for IRQ, 1 for MSI/IRQ and 2 for MSI-
             X/MSI/IRQ.  The default value is 2.

     hw.bxe.queue_count
             Specify the number of queues that will be used when a multi-queue RSS mode is
             selected using bxe_multi_mode.  Allowed values are 0 for Auto or 1 to 16 for fixed
             number of queues.  The default value is 0.

     hw.bxe.multi_mode
             Enable Receive Side Steering.  Allowed values are 0, which disables all multi-
             queue/packet sorting algorithms, and 1, which assigns incoming frames to receive
             queues according to RSS.  The default value is 0.

     hw.bxe.rx_ticks
             Control interrupt coalescing for received frames.  The first frame always causes an
             interrupt, but subsequent frames are coalesced until the RX/TX ticks timer value
             expires and another interrupt occurs.  The default value is 25.

     hw.bxe.tx_ticks
             Control interrupt coalescing for trasmitted frames.  The first frame always causes
             an interrupt, but subsequent frames are coalesced until the RX/TX ticks timer value
             expires and another interrupt occurs.  The default value is 50.

     hw.bxe.mrrs
             Allows to set the PCIe maximum read request size.  Allowed values are -1 for Auto, 0
             for 128B, 1 for 256B, 2 for 512B, and 3 for 1kB.  The default value is -1.

SEE ALSO

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

HISTORY

     The bxe device driver first appeared in FreeBSD 9.0.

AUTHORS

     The bxe driver was written by Gary Zambrano <zambrano@broadcom.com> and
     David Christensen <davidch@broadcom.com>.