230 lines
7.7 KiB
Groff
230 lines
7.7 KiB
Groff
.\" Copyright (c) 2011-2012, Chelsio Inc
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.\" All rights reserved.
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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 are met:
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.\"
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.\" 1. Redistributions of source code must retain the above copyright notice,
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.\" this list of conditions and the following disclaimer.
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.\"
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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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.\" 3. Neither the name of the Chelsio Inc nor the names of its
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.\" contributors may be used to endorse or promote products derived from
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.\" this software without specific prior written permission.
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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 BE
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.\" 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 THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\" * Other names and brands may be claimed as the property of others.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd February 25, 2012
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.Dt CXGBE 4
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.Os
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.Sh NAME
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.Nm cxgbe
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.Nd "Chelsio T4 10Gb and 1Gb Ethernet adapter 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 cxgbe"
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.Ed
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.Pp
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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_cxgbe_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 PCI Express Ethernet adapters based on
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the Chelsio Terminator 4 (T4) ASIC.
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The driver supports Jumbo Frames, Transmit/Receive checksum offload,
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TCP segmentation offload (TSO), Large Receive Offload (LRO), VLAN
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tag insertion/extraction, VLAN checksum offload, VLAN TSO, and
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Receive Side Steering (RSS).
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For further hardware information and questions related to hardware
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requirements, see
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.Pa http://www.chelsio.com/ .
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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 supports 10Gb and 1Gb Ethernet adapters based on the T4 ASIC:
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.Pp
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.Bl -bullet -compact
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.It
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Chelsio T420-CR
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.It
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Chelsio T422-CR
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.It
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Chelsio T440-CR
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.It
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Chelsio T420-BCH
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.It
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Chelsio T440-BCH
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.It
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Chelsio T440-CH
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.It
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Chelsio T420-SO
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.It
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Chelsio T420-CX
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.It
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Chelsio T420-BT
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.It
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Chelsio T404-BT
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.El
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.Sh LOADER TUNABLES
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Tunables can be set at the
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.Xr loader 8
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prompt before booting the kernel or stored in
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.Xr loader.conf 5 .
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.Bl -tag -width indent
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.It Va hw.cxgbe.ntxq10g
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The number of tx queues to use for a 10Gb port.
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The default is 16 or the number
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of CPU cores in the system, whichever is less.
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.It Va hw.cxgbe.nrxq10g
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The number of rx queues to use for a 10Gb port.
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The default is 8 or the number
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of CPU cores in the system, whichever is less.
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.It Va hw.cxgbe.ntxq1g
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The number of tx queues to use for a 1Gb port.
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The default is 4 or the number
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of CPU cores in the system, whichever is less.
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.It Va hw.cxgbe.nrxq1g
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The number of rx queues to use for a 1Gb port.
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The default is 2 or the number
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of CPU cores in the system, whichever is less.
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.It Va hw.cxgbe.nofldtxq10g
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The number of TOE tx queues to use for a 10Gb port.
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The default is 8 or the
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number of CPU cores in the system, whichever is less.
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.It Va hw.cxgbe.nofldrxq10g
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The number of TOE rx queues to use for a 10Gb port.
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The default is 2 or the
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number of CPU cores in the system, whichever is less.
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.It Va hw.cxgbe.nofldtxq1g
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The number of TOE tx queues to use for a 1Gb port.
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The default is 2 or the
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number of CPU cores in the system, whichever is less.
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.It Va hw.cxgbe.nofldrxq1g
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The number of TOE rx queues to use for a 1Gb port.
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The default is 1.
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.It Va hw.cxgbe.holdoff_timer_idx_10G
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.It Va hw.cxgbe.holdoff_timer_idx_1G
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The timer index value to use to delay interrupts.
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The holdoff timer list has the values 1, 5, 10, 50, 100, and 200
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by default (all values are in microseconds) and the index selects a
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value from this list.
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The default value is 1 for both 10Gb and 1Gb ports, which means the
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timer value is 5us.
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Different cxgbe interfaces can be assigned different values at any time via the
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dev.cxgbe.X.holdoff_tmr_idx sysctl.
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.It Va hw.cxgbe.holdoff_pktc_idx_10G
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.It Va hw.cxgbe.holdoff_pktc_idx_1G
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The packet-count index value to use to delay interrupts.
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The packet-count list has the values 1, 8, 16, and 32 by default
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and the index selects a value from this list.
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The default value is -1 for both 10Gb and 1Gb ports, which means packet
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counting is disabled and interrupts are generated based solely on the
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holdoff timer value.
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Different cxgbe interfaces can be assigned different values via the
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dev.cxgbe.X.holdoff_pktc_idx sysctl.
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This sysctl works only when the interface has never been marked up (as done by
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ifconfig up).
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.It Va hw.cxgbe.qsize_txq
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The size, in number of entries, of the descriptor ring used for a tx
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queue.
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A buf_ring of the same size is also allocated for additional
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software queuing.
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See
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.Xr ifnet 9 .
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The default value is 1024.
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Different cxgbe interfaces can be assigned different values via the
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dev.cxgbe.X.qsize_txq sysctl.
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This sysctl works only when the interface has never been marked up (as done by
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ifconfig up).
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.It Va hw.cxgbe.qsize_rxq
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The size, in number of entries, of the descriptor ring used for an
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rx queue.
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The default value is 1024.
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Different cxgbe interfaces can be assigned different values via the
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dev.cxgbe.X.qsize_rxq sysctl.
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This sysctl works only when the interface has never been marked up (as done by
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ifconfig up).
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.It Va hw.cxgbe.interrupt_types
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The interrupt types that the driver is allowed to use.
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Bit 0 represents INTx (line interrupts), bit 1 MSI, bit 2 MSI-X.
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The default is 7 (all allowed).
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The driver will select the best possible type out of the allowed types by
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itself.
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.It Va hw.cxgbe.config_file
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Select a pre-packaged device configuration file.
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A configuration file contains a recipe for partitioning and configuring the
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hardware resources on the card.
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This tunable is for specialized applications only and should not be used in
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normal operation.
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The configuration profile currently in use is available in the dev.t4nex.X.cf
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and dev.t4nex.X.cfcsum sysctls.
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.It Va hw.cxgbe.linkcaps_allowed
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.It Va hw.cxgbe.niccaps_allowed
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.It Va hw.cxgbe.toecaps_allowed
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.It Va hw.cxgbe.rdmacaps_allowed
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.It Va hw.cxgbe.iscsicaps_allowed
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.It Va hw.cxgbe.fcoecaps_allowed
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Disallowing capabilities provides a hint to the driver and firmware to not
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reserve hardware resources for that feature.
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Each of these is a bit field with a bit for each sub-capability within the
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capability.
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This tunable is for specialized applications only and should not be used in
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normal operation.
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The capabilities for which hardware resources have been reserved are listed in
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dev.t4nex.X.*caps sysctls.
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.El
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.Sh SUPPORT
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For general information and support,
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go to the Chelsio support website at:
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.Pa http://www.chelsio.com/ .
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.Pp
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If an issue is identified with this driver with a supported adapter,
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email all the specific information related to the issue to
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.Aq support@chelsio.com .
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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 cxgb 4 ,
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.Xr netintro 4 ,
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.Xr ng_ether 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 9.0 .
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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 Navdeep Parhar Aq np@FreeBSD.org .
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