bxe

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

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

if_bxe_load="YES"

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).

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

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.

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

The bxe device driver first appeared in FreeBSD 9.0.

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