Ubuntu Manpage: bnxt — Broadcom NetXtreme-C/NetXtreme-E Family Ethernet driver

Provided by: freebsd-manpages_12.2-1_all

NAME

     bnxt — Broadcom NetXtreme-C/NetXtreme-E Family Ethernet driver

SYNOPSIS

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

           device iflib
           device bnxt

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

           if_bnxt_load="YES"

DESCRIPTION

     The bnxt driver provides support for various NICs based on the Broadcom BCM57301/2/4, and
     BCM57402/4/6 Ethernet controller chips.

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

HARDWARE

     The bnxt driver provides support for various NICs based on the Broadcom NetXtreme-C and
     NetXtreme-E families of Gigabit Ethernet controller chips, including the following:

     •   Broadcom BCM57301 NetXtreme-C 10Gb Ethernet Controller
     •   Broadcom BCM57302 NetXtreme-C 10Gb/25Gb Ethernet Controller
     •   Broadcom BCM57304 NetXtreme-C 10Gb/25Gb/40Gb/50Gb Ethernet Controller
     •   Broadcom BCM57304 NetXtreme-C Ethernet Virtual Function
     •   Broadcom BCM57314 NetXtreme-C Ethernet Virtual Function
     •   Broadcom BCM57402 NetXtreme-E 10Gb Ethernet Controller
     •   Broadcom BCM57402 NetXtreme-E Ethernet Partition
     •   Broadcom BCM57404 NetXtreme-E 10Gb/25Gb Ethernet Controller
     •   Broadcom BCM57404 NetXtreme-E Ethernet Virtual Function
     •   Broadcom BCM57404 NetXtreme-E Partition
     •   Broadcom BCM57406 NetXtreme-E 10GBASE-T Ethernet Controller
     •   Broadcom BCM57406 NetXtreme-E Partition
     •   Broadcom BCM57407 NetXtreme-E 10GBase-T Ethernet Controller
     •   Broadcom BCM57407 NetXtreme-E 25Gb Ethernet Controller
     •   Broadcom BCM57407 NetXtreme-E Partition
     •   Broadcom BCM57412 NetXtreme-E Partition
     •   Broadcom BCM57414 NetXtreme-E Ethernet Virtual Function
     •   Broadcom BCM57414 NetXtreme-E Partition
     •   Broadcom BCM57416 NetXtreme-E Partition
     •   Broadcom BCM57417 NetXtreme-E Ethernet Partition
     •   Broadcom BCM57454 NetXtreme-E 10Gb/25Gb/40Gb/50Gb/100Gb Ethernet

SYSCTL VARIABLES

These variables must be set before loading the driver, either via loader.conf(5) or through
the use of kenv(1). These are provided by the iflib(4) framework, and might be better
documented there.

dev.bnxt.X.iflib.override_nrxds
Override the number of RX descriptors for each queue. The value is a comma
separated list of three positive integers: the size of the completion ring, the size
of the receive ring, and the size of the aggregation ring respectively. The
completion ring should be at least the size of the aggregation ring plus four times
the size of the receive ring. These numbers must be powers of two, and zero means
to use the default. Defaults to 0,0,0.

dev.bnxt.X.iflib.override_ntxds
Override the number of TX descriptors for each queue. The value is a comma
separated list of two positive integers: the size of the completion ring, and the
size of the transmit ring respectively. The completion ring should be at least
twice the size of the transmit ring. These numbers must be powers of two, and zero
means to use the default. Defaults to 0,0.

override_qs_enable
When set, allows the number of transmit and receive queues to be different. If not
set, the lower of the number of TX or RX queues will be used for both.

override_nrxqs
Set the number of RX queues. If zero, the number of RX queues is derived from the
number of cores on the socket connected to the controller. Defaults to 0.

override_ntxqs
Set the number of TX queues. If zero, the number of TX queues is derived from the
number of cores on the socket connected to the controller.

These sysctl(8) variables can be changed at any time:

dev.bnxt.X.vlan_only
Require that incoming frames must have a VLAN tag on them that matches one that is
configured for the NIC. Normally, both frames that have a matching VLAN tag and
frames that have no VLAN tag are accepted. Defaults to 0.

dev.bnxt.X.vlan_strip
When non-zero the NIC strips VLAN tags on receive. Defaults to 0.

dev.bnxt.X.rx_stall
Enable buffering rather than dropping frames when there are no available host RX
buffers for DMA. Defaults to 0.

dev.bnxt.X.rss_type
Comma-separated list of RSS hash types to support. Default is all types. Defaults
to ipv4,tcp_ipv4,udp_ipv4,ipv6,tcp_ipv6,udp_ipv6.

dev.bnxt.X.rss_key
Current RSS key. Defaults to a randomly generated value which is generated for each
device during attach.

dev.bnxt.X.ver.hwrm_min_ver
Minimum HWRM (HardWare Resource Manager) firmware API to support. If the firmware
implements an older version, a warning will be printed, and the firmware should be
upgraded. Defaults to 1.2.2.

These sysctl(8) variables are read-only:

dev.bnxt.X.if_name
Current interface name of the device. This will normally be bnxtX, but this can be
changed using ifconfig name. This sysctl allows correlating an interface with a
child of dev.bnxt.

dev.bnxt.X.nvram.*
Information about the NVRAM device which contains the device firmware.

dev.bnxt.X.ver.*
Version-related information about the device and firmware:

dev.bnxt.X.ver.hwrm_if
Supported HWRM API version of the currently running firmware.

dev.bnxt.X.ver.driver_hwrm_if
HWRM API version the driver was built to support.

dev.bnxt.X.hwstats.*
Per-queue statistics tracked by the hardware.

dev.bnxt.X.hwstats.port_stats.*
Per-port statistics tracked by the hardware.

dev.bnxt.X.hwstats.rxq0.drop_pkts
Number of packets dropped by hardware on queue zero. This number might seem high,
but the count includes packets dropped due to incorrect destination MAC,
unsubscribed multicast address, and other normal reasons to ignore Ethernet frames.

dev.bnxt.X.hwstats.rxq0.tpa_*
statistics related to HW LRO.

dev.bnxt.X.hw_lro.*
Enable / Disable HW LRO feature. Defaults to disable. Enabling HW LRO could cause
issues when forwarding is enabled on host.

dev.bnxt.X.fc
Enable / Disable Flow Control feature. Defaults to Enable

DIAGNOSTICS

     bnxt%d: %s command returned %s error.  Device firmware rejected a command from the driver.
     There might be a driver/firmware HWRM API mismatch.

     bnxt%d: Timeout sending %s (timeout: %d) seq %d  Device firmware unresponsive.  A PCI device
     reset is likely needed.

     bnxt%d: Timeout sending %s (timeout: %d) msg {0x%x 0x%x} len:%d v: %d  Partial firmware
     response.  A PCI device reset is likely needed.

     As of this writing, the system must be rebooted to initiate a PCI device reset.

HISTORY

     The bnxt device driver first appeared in FreeBSD 11.1.

AUTHORS

     The bnxt driver was written by Jack Vogel <jfvogel@gmail.com> and Stephen Hurd
     <shurd@freebsd.org>, and is currently maintained by Broadcom Limited
     <freebsd.pdl@broadcom.com>.