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bnxt - Broadcom 10/25GbE PCI Express NIC Driver




The bnxt 10/25 Gigabit Ethernet driver is a multi-threaded, loadable, cloneable, GLD-based STREAMS driver supporting the Data Link Provider Interface, dlpi, on Broadcom E-Series 10/25 Gigabit Ethernet controllers. For more information, see the dlpi(4P) man page.

The bnxt driver functions include controller initialization, frame transmit and receive, promiscuous and multicast support, and error recovery and reporting.

Application Programming Interface
The cloning character-special device, /dev/bnxt, is used to access all Broadcom E-Series 10/25GbE PCI Express Ethernet devices installed within the system.

You must send an explicit DL_ATTACH_REQ message to associate the opened stream with a particular device (PPA). The PPA ID is interpreted as an unsigned integer data type, and indicates the corresponding device instance (unit) number. The driver returns an error, DL_ERROR_ACK, if the PPA field value does not correspond to a valid device instance number for the system. The device is initialized on first attach and de-initialized (stopped) at last detach.

The values returned by the driver in the DL_INFO_ACK primitive in response to DL_INFO_REQ are:

oMaximum SDU is 9582
oMinimum SDU is 0
oDLSAP address length is 8
oMAC type is DL_ETHER
oService Access Point (SAP) length value is -2, which means that the physical address component is immediately followed by a 2-byte SAP component within the DLSAP address
oBroadcast address value is the Ethernet/IEEE broadcast address (FF:FF:FF:FF:FF:FF)

Once in the DL_ATTACHED state, you must send a DL_BIND_REQ to associate a particular SAP with the stream

The bnxt driver is managed by the dladm command line utility, which not only allows the VLANs to be defined on top of the bnxt instances, but also allows for the bnxt instances to be aggregated. For more information, see the dladm(8) man page.



Special character device


64-bit device driver for x86


64-bit device driver for SPARC


Configuration file


See attributes(7) for descriptions of the following attributes:


dladm(8), netstat(8), driver.conf(5), attributes(7), streamio(4I), dlpi(4P)

Writing Device Drivers in Oracle Solaris 11.4

STREAMS Programming Guide

solaris/bnxt.4d.txt · Last modified: 2023/07/19 08:57 by A User Not Logged in