.\" Copyright(c) 2016 - 2022 Intel Corporation .\" All rights reserved. .\" .\" This software is available to you under a choice of one of two .\" licenses. You may choose to be licensed under the terms of the GNU .\" General Public License (GPL) Version 2, available from the file .\" COPYING in the main directory of this source tree, or the .\" OpenFabrics.org BSD license below: .\" .\" Redistribution and use in source and binary forms, with or .\" without modification, are permitted provided that the following .\" conditions are met: .\" .\" - Redistributions of source code must retain the above .\" copyright notice, this list of conditions and the following .\" disclaimer. .\" .\" - Redistributions in binary form must reproduce the above .\" copyright notice, this list of conditions and the following .\" disclaimer in the documentation and/or other materials .\" provided with the distribution. .\" .\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, .\" EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF .\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND .\" NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS .\" BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN .\" ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN .\" CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE .\" SOFTWARE. .\" .\" $FreeBSD$ .\" .Dd March 30, 2022 .Dt IRDMA 4 .Os .Sh NAME .Nm irdma .Nd RDMA FreeBSD driver for Intel(R) Ethernet Controller E810 .Sh SYNOPSIS This module relies on .Xr if_ice 4 .Bl -tag -nested-width indent .It The following kernel options should be included in the configuration: .Cd options OFED .Cd options OFED_DEBUG_INIT .Cd options COMPAT_LINUXKPI .Cd options SDP .Cd options IPOIB_CM .El .Sh DESCRIPTION .Ss Features The .Nm driver provides RDMA protocol support on RDMA-capable Intel Ethernet 800 Series NICs which are supported by .Xr if_ice 4 . .Pp The driver supports both iWARP and RoCEv2 protocols. .Sh CONFIGURATION .Ss TUNABLES Tunables can be set at the .Xr loader 8 prompt before booting the kernel or stored in .Xr loader.conf 5 . .Bl -tag -width indent .It Va dev.irdma.roce_enable enables RoCEv2 protocol usage on interface. .Pp By default RoCEv2 protocol is used. .It Va dev.irdma.dcqcn_cc_cfg_valid indicates that all DCQCN parameters are valid and should be updated in registers or QP context. .Pp Setting this parameter to 1 means that settings in .Em dcqcn_min_dec_factor, dcqcn_min_rate_MBps, dcqcn_F, dcqcn_T, .Em dcqcn_B, dcqcn_rai_factor, dcqcn_hai_factor, dcqcn_rreduce_mperiod are taken into account. Otherwise default values are used. .Pp Note: "roce_enable" must also be set for this tunable to take effect. .It Va dev.irdma.dcqcn_min_dec_factor The minimum factor by which the current transmit rate can be changed when processing a CNP. Value is given as a percentage (1-100). .Pp Note: "roce_enable" and "dcqcn_cc_cfg_valid" must also be set for this tunable to take effect. .It Va dev.irdma.dcqcn_min_rate_MBps The minimum value, in Mbits per second, for rate to limit. .Pp Note: "roce_enable" and "dcqcn_cc_cfg_valid" must also be set for this tunable to take effect. .It Va dev.irdma.dcqcn_F The number of times to stay in each stage of bandwidth recovery. .Pp Note: "roce_enable" and "dcqcn_cc_cfg_valid" must also be set for this tunable to take effect. .It Va dev.irdma.dcqcn_T The number of microseconds that should elapse before increasing the CWND in DCQCN mode. .Pp Note: "roce_enable" and "dcqcn_cc_cfg_valid" must also be set for this tunable to take effect. .It Va dev.irdma.dcqcn_B The number of bytes to transmit before updating CWND in DCQCN mode. .Pp Note: "roce_enable" and "dcqcn_cc_cfg_valid" must also be set for this tunable to take effect. .It Va dev.irdma.dcqcn_rai_factor The number of MSS to add to the congestion window in additive increase mode. .Pp Note: "roce_enable" and "dcqcn_cc_cfg_valid" must also be set for this tunable to take effect. .It Va dev.irdma.dcqcn_hai_factor The number of MSS to add to the congestion window in hyperactive increase mode. .Pp Note: "roce_enable" and "dcqcn_cc_cfg_valid" must also be set for this tunable to take effect. .It Va dev.irdma.dcqcn_rreduce_mperiod The minimum time between 2 consecutive rate reductions for a single flow. Rate reduction will occur only if a CNP is received during the relevant time interval. .Pp Note: "roce_enable" and "dcqcn_cc_cfg_valid" must also be set for this tunable to take effect. .Ss SYSCTL PROCEDURES Sysctl controls are available for runtime adjustments. .Bl -tag -width indent .It Va dev.irdma.debug defines level of debug messages. .Pp Typical value: 1 for errors only, 0x7fffffff for full debug. .It Va dev.irdma.dcqcn_enable enables the DCQCN algorithm for RoCEv2. .Pp Note: "roce_enable" must also be set for this sysctl to take effect. .Pp Note: The change may be set at any time, but it will be applied only to newly created QPs. .Ss TESTING .Bl -enum .It To load the irdma driver, run: .Bl -tag -width indent .It kldload irdma .El If if_ice is not already loaded, the system will load it on its own. Please check whether the value of sysctl .Va hw.ice.irdma is 1, if the irdma driver is not loading. To change the value put: .Bl -tag -width indent .It hw.ice.irdma=1 .El to .Pa /boot/loader.conf and reboot. .It To check that the driver was loaded, run: .Bl -tag -width indent .It sysctl -a | grep infiniband .El Typically, if everything goes well, around 190 entries per PF will appear. .It Each interface of the card may work in either iWARP or RoCEv2 mode. To enable RoCEv2 compatibility, add: .Bl -tag -width indent .It dev.irdma.roce_enable=1 .El where is a desired ice interface number on which RoCEv2 protocol needs to be enabled, to: .Bl -tag -width indent .It .Pa /boot/loader.conf .El for instance: .Bl -tag -width indent .It dev.irdma0.roce_enable=0 .It dev.irdma1.roce_enable=1 .El will keep iWARP mode on ice0 and enable RoCEv2 mode on interface ice1. The RoCEv2 mode is the default. .Dl To check irdma roce_enable status, run: .Bl -tag -width indent .It sysctl dev.irdma.roce_enable .El for instance: .Bl -tag -width indent .It sysctl dev.irdma2.roce_enable .El with returned value of '0' indicate the iWARP mode, and the value of '1' indicate the RoCEv2 mode. .Pp Note: An interface configured in one mode will not be able to connect to a node configured in another mode. .Pp Note: RoCEv2 has currently limited support, for functional testing only. DCB and Priority Flow Controller (PFC) are not currently supported which may lead to significant performance loss or connectivity issues. .It Enable flow control in the ice driver: .Bl -tag -width indent .It sysctl dev.ice..fc=3 .El Enable flow control on the switch your system is connected to. See your switch documentation for details. .It The source code for krping software is provided with the kernel in /usr/src/sys/contrib/rdma/krping/. To compile the software, change directory to /usr/src/sys/modules/rdma/krping/ and invoke the following: .Bl -tag -width indent .It make clean .It make .It make install .El .It Start a krping server on one machine: .Bl -tag -width indent .It echo size=64,count=1,port=6601,addr=100.0.0.189,server > /dev/krping .El .It Connect a client from another machine: .Bl -tag -width indent .It echo size=64,count=1,port=6601,addr=100.0.0.189,client > /dev/krping .El .Sh SUPPORT For general information and support, go to the Intel support website at: .Lk http://support.intel.com/ . .Pp If an issue is identified with this driver with a supported adapter, email all the specific information related to the issue to .Mt freebsd@intel.com . .Sh SEE ALSO .Xr if_ice 4 .Sh AUTHORS .An -nosplit The .Nm driver was prepared by .An Bartosz Sobczak Aq Mt bartosz.sobczak@intel.com .