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>.

Debian                                            June 25, 2012                                           BXE(4)