225 lines
7.5 KiB
Groff
225 lines
7.5 KiB
Groff
.\" Copyright (c) 2016 Broadcom, All Rights Reserved.
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.\" The term Broadcom refers to Broadcom Limited and/or its subsidiaries
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\"
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS'
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.\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
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.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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.\" THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd May 9, 2017
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.Dt BNXT 4
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.Os
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.Sh NAME
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.Nm bnxt
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.Nd "Broadcom NetXtreme-C/NetXtreme-E Family Ethernet driver"
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.Sh SYNOPSIS
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To compile this driver into the kernel,
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place the following lines in your
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kernel configuration file:
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.Bd -ragged -offset indent
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.Cd "device bnxt"
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.Ed
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.Pp
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Alternatively, to load the driver as a
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module at boot time, place the following line in
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.Xr loader.conf 5 :
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.Bd -literal -offset indent
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if_bnxt_load="YES"
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.Ed
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.Sh DESCRIPTION
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The
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.Nm
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driver provides support for various NICs based on the Broadcom BCM57301/2/4,
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and BCM57402/4/6 Ethernet controller chips.
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.Pp
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For more information on configuring this device, see
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.Xr ifconfig 8 .
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.Sh HARDWARE
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The
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.Nm
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driver provides support for various NICs based on the Broadcom NetXtreme-C and
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NetXtreme-E families of Gigabit Ethernet controller chips, including the
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following:
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.Pp
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.Bl -bullet -compact
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.It
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Broadcom BCM57301 NetXtreme-C 10Gb Ethernet Controller
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.It
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Broadcom BCM57302 NetXtreme-C 10Gb/25Gb Ethernet Controller
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.It
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Broadcom BCM57304 NetXtreme-C 10Gb/25Gb/40Gb/50Gb Ethernet Controller
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.It
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Broadcom BCM57402 NetXtreme-E 10Gb Ethernet Controller
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.It
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Broadcom BCM57404 NetXtreme-E 10Gb/25Gb Ethernet Controller
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.It
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Broadcom BCM57406 NetXtreme-E 10GBase-T Ethernet Controller
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.It
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Broadcom BCM57402 NetXtreme-E Partition
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.It
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Broadcom BCM57407 NetXtreme-E 10GBase-T Ethernet Controller
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.It
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Broadcom BCM57404 NetXtreme-E Partition
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.It
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Broadcom BCM57406 NetXtreme-E Partition
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.It
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Broadcom BCM57407 NetXtreme-E 25Gb Ethernet Controller
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.It
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Broadcom BCM57304 NetXtreme-C Virtual Function
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.It
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Broadcom BCM57404 NetXtreme-E Virtual Function
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.El
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.Sh SYSCTL VARIABLES
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These variables must be set before loading the driver, either via
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.Xr loader.conf 5
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or through the use of
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.Xr kenv 1 .
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These are provided by the
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.Xr iflib 9
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framework, and might be better documented there.
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.Bl -tag -width indent
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.It Va dev.bnxt.X.iflib.override_nrxds
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Override the number of RX descriptors for each queue.
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The value is a comma separated list of three positive integers: the size of the
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completion ring,
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the size of the receive ring, and the size of the aggregation ring respectively.
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The completion ring should be at least the size of the aggregation ring plus
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four times the size of the receive ring.
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These numbers must be powers of two, and zero means to use the default.
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Defaults to 0,0,0.
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.It Va dev.bnxt.X.iflib.override_ntxds
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Override the number of TX descriptors for each queue.
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The value is a comma separated list of two positive integers: the size of the
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completion ring, and the size of the transmit ring respectively.
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The completion ring should be at least twice the size of the transmit ring.
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These numbers must be powers of two, and zero means to use the default.
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Defaults to 0,0.
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.It Va override_qs_enable
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When set, allows the number of transmit and receive queues to be different.
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If not set, the lower of the number of TX or RX queues will be used for both.
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.It Va override_nrxqs
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Set the number of RX queues.
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If zero, the number of RX queues is derived from the number of cores on the
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socket connected to the controller.
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Defaults to 0.
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.It Va override_ntxqs
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Set the number of TX queues.
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If zero, the number of TX queues is derived from the number of cores on the
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socket connected to the controller.
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.El
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.Pp
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These
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.Xr sysctl 8
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variables can be changed at any time:
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.Bl -tag -width indent
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.It Va dev.bnxt.X.vlan_only
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Require that incoming frames must have a VLAN tag on them that matches one that
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is configured for the NIC.
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Normally, both frames that have a matching VLAN tag and frames that have no
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VLAN tag are accepted.
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Defaults to 0.
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.It Va dev.bnxt.X.vlan_strip
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When non-zero the NIC strips VLAN tags on receive.
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Defaults to 0.
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.It Va dev.bnxt.X.rx_stall
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Enable buffering rather than dropping frames when there are no available host
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RX buffers for DMA.
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Defaults to 0.
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.It Va dev.bnxt.X.rss_type
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Comma-separated list of RSS hash types to support.
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Default is all types.
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Defaults to ipv4,tcp_ipv4,udp_ipv4,ipv6,tcp_ipv6,udp_ipv6.
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.It Va dev.bnxt.X.rss_key
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Current RSS key.
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Defaults to a randomly generated value which is generated for each device
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during attach.
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.It Va dev.bnxt.X.ver.hwrm_min_ver
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Minimum HWRM (HardWare Resource Manager) firmware API to support.
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If the firmware implements an older version, a warning will be printed, and the
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firmware should be upgraded.
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Defaults to 1.2.2.
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.El
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.Pp
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These
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.Xr sysctl 8
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variables are read-only:
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.Bl -tag -width indent
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.It Va dev.bnxt.X.if_name
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Current interface name of the device.
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This will normally be
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.Va bnxtX ,
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but this can be changed using
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.Cm ifconfig name .
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This sysctl allows correlating an interface with a child of
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.Va dev.bnxt .
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.It Va dev.bnxt.X.nvram.*
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Information about the NVRAM device which contains the device firmware.
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.It Va dev.bnxt.X.ver.*
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Version-related information about the device and firmware:
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.It Va dev.bnxt.X.ver.hwrm_if
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Supported HWRM API version of the currently running firmware.
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.It Va dev.bnxt.X.ver.driver_hwrm_if
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HWRM API version the driver was built to support.
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.It Va dev.bnxt.X.hwstats.*
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Per-queue statistics tracked by the hardware.
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.It Va dev.bnxt.X.hwstats.rxq0.drop_pkts
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Number of packets dropped by hardware on queue zero.
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This number might seem high, but the count includes packets dropped due to
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incorrect destination MAC, unsubscribed multicast address, and other normal
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reasons to ignore Ethernet frames.
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.El
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.Sh DIAGNOSTICS
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.Bl -diag
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.It "bnxt%d: %s command returned %s error."
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Device firmware rejected a command from the driver.
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There might be a driver/firmware HWRM API mismatch.
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.It "bnxt%d: Timeout sending %s (timeout: %d) seq %d"
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Device firmware unresponsive.
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A PCI device reset is likely needed.
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.It "bnxt%d: Timeout sending %s (timeout: %d) msg {0x%x 0x%x} len:%d v: %d"
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Partial firmware response.
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A PCI device reset is likely needed.
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.Pp
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As of this writing, the system must be rebooted to initiate a PCI device reset.
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.El
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.Sh SEE ALSO
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.Xr altq 4 ,
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.Xr arp 4 ,
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.Xr iflib 4 ,
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.Xr netintro 4 ,
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.Xr ng_ether 4 ,
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.Xr vlan 4 ,
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.Xr ifconfig 8
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.Sh HISTORY
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The
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.Nm
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device driver first appeared in
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.Fx 11.1 .
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.Sh AUTHORS
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.An -nosplit
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The
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.Nm
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driver was written by
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.An Jack Vogel Aq Mt jfvogel@gmail.com ,
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and is currently maintained by
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.An Stephen Hurd Aq Mt stephen.hurd@broadcom.com .
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