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BNX(4) Device Drivers Manual BNX(4)

bnxBroadcom NetXtreme II 10/100/1Gb Ethernet device

bnx* at pci?
brgphy* at mii?

The bnx driver supports Broadcom's NetXtreme II product family which is made up of the BCM5706, BCM5708, BCM5709, and BCM5716 Ethernet controller chips. Products using these controller chips include:

The NetXtreme II product family is composed of various Converged NIC (or CNIC) Ethernet controllers which support a TCP Offload Engine (TOE), Remote DMA (RDMA), and iSCSI acceleration, in addition to standard L2 Ethernet traffic, all on the same controller. The following features are supported in the bnx driver under OpenBSD:

IPv4 receive IP/TCP/UDP checksum offload
IPv4 transmit TCP/UDP checksum offload
VLAN tag insertion and stripping
interrupt coalescing
10/100/1000Mbps operation in full-duplex mode
10/100Mbps operation in half-duplex mode

The bnx driver supports the following media types:

Enable autoselection of the media type and options. The user can manually override the autoselected mode via ifconfig(8).
Set 10Mbps operation. The ifconfig(8) mediaopt option can also be used to select either full-duplex or half-duplex modes.
Set 100Mbps (Fast Ethernet) operation. The ifconfig(8) mediaopt option can also be used to select either full-duplex or half-duplex modes.
Set 1000baseT operation over twisted pair. Only full-duplex mode is supported.
Set 1000Mbps (Gigabit Ethernet) operation. Only full-duplex mode is supported.
Set 2500Mbps operation. Only full-duplex mode is supported.

The bnx driver supports the following media options:

Force full duplex operation.
Force half duplex operation.

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

The adapter needs firmware files to run, which are loaded on demand by the driver when the device is attached:

/etc/firmware/bnx-b06
 
/etc/firmware/bnx-b09
 
/etc/firmware/bnx-rv2p
 
/etc/firmware/bnx-xi-rv2p
 
/etc/firmware/bnx-xi90-rv2p
 

arp(4), brgphy(4), ifmedia(4), intro(4), netintro(4), pci(4), hostname.if(5), ifconfig(8)

The bnx device driver first appeared in OpenBSD 4.0.

The bnx driver was written by David Christensen <davidch@broadcom.com> and ported to OpenBSD by Brad Smith <brad@openbsd.org>.

September 8, 2021 OpenBSD-7.3