diff options
Diffstat (limited to 'share/man/man4')
| -rw-r--r-- | share/man/man4/Makefile | 3 | ||||
| -rw-r--r-- | share/man/man4/sume.4 | 98 |
2 files changed, 101 insertions, 0 deletions
diff --git a/share/man/man4/Makefile b/share/man/man4/Makefile index c23ccabd44d0..34cb8e10a060 100644 --- a/share/man/man4/Makefile +++ b/share/man/man4/Makefile @@ -514,6 +514,7 @@ MAN= aac.4 \ ste.4 \ stf.4 \ stge.4 \ + ${_sume.4} \ ${_superio.4} \ sym.4 \ syncache.4 \ @@ -851,6 +852,7 @@ _qlxgbe.4= qlxgbe.4 _qlnxe.4= qlnxe.4 _sfxge.4= sfxge.4 _smartpqi.4= smartpqi.4 +_sume.4= sume.4 _vmd.4= vmd.4 MLINKS+=qlxge.4 if_qlxge.4 @@ -858,6 +860,7 @@ MLINKS+=qlxgb.4 if_qlxgb.4 MLINKS+=qlxgbe.4 if_qlxgbe.4 MLINKS+=qlnxe.4 if_qlnxe.4 MLINKS+=sfxge.4 if_sfxge.4 +MLINKS+=sume.4 if_sume.4 .if ${MK_BHYVE} != "no" _bhyve.4= bhyve.4 diff --git a/share/man/man4/sume.4 b/share/man/man4/sume.4 new file mode 100644 index 000000000000..66c221cc2d08 --- /dev/null +++ b/share/man/man4/sume.4 @@ -0,0 +1,98 @@ +.\"- +.\" SPDX-License-Identifier: BSD-2-Clause-FreeBSD +.\" +.\" Copyright (c) 2020 Denis Salopek +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. 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. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" +.\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +.\" ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE +.\" LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR +.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF +.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS +.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN +.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) +.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE +.\" POSSIBILITY OF SUCH DAMAGE. +.\" +.\" $FreeBSD$ +.\" +.Dd August 30, 2020 +.Dt SUME 4 +.Os +.Sh NAME +.Nm sume +.Nd "NetFPGA SUME 4x10Gb Ethernet driver" +.Sh SYNOPSIS +To compile this driver into the kernel, place the following lines +in your kernel configuration file: +.Bd -ragged -offset indent +.Cd "device sume" +.Ed +.Pp +Alternatively, to load the driver as a module at boot time, place +the following line in +.Xr loader.conf 5 : +.Bd -literal -offset indent +if_sume_load="YES" +.Ed +.Sh DESCRIPTION +The +.Nm +driver provides support for NetFPGA SUME Virtex-7 FPGA Development Board +with the reference NIC bitstream loaded onto it. +The HDL design for the reference NIC project uses the RIFFA based DMA +engine to communicate with the host machine over PCIe. +Every packet is transmitted to / from the board via a single DMA +transaction, taking up to two or three interrupts per one transaction +which yields low performance. +.Pp +There is no support for Jumbo frames as the hardware is capable of +dealing only with frames with maximum size of 1514 bytes. +The hardware does not support multicast filtering, provides no checksums, +and offers no other offloading. +.Sh SEE ALSO +.Xr arp 4 , +.Xr netgraph 4 , +.Xr netintro 4 , +.Xr ng_ether 4 , +.Xr vlan 4 , +.Xr ifconfig 8 +.Sh AUTHORS +The Linux +.Nm +driver was originally written by +.An -nosplit +.An Bjoern A. Zeeb . +The +.Fx version and this manual page were written by +.An Denis Salopek +as a GSoC project. +More information about the project can be found here: +.Pa https://wiki.freebsd.org/SummerOfCode2020Projects/NetFPGA_SUME_Driver +.Sh BUGS +The reference NIC hardware design provides no mechanism for quiescing +inbound traffic from interfaces configured as DOWN. +All packets from administratively disabled interfaces are transferred to +main memory, leaving the driver with the task of dropping such packets, +thus consuming PCI bandwidth, interrupts and CPU cycles in vain. +.Pp +Pre-built FPGA bitstream from the NetFPGA project may not work correctly. +At higher RX packet rates, the newly incoming packets can overwrite the +ones in an internal FIFO so the packets would arrive in main memory +corrupted, until a physical reset of the board. +.Pp +Occasionally, the driver can get stuck in a non-IDLE TX state due to +a missed interrupt. +The driver includes a watchdog function which monitors for such a +condition and resets the board automatically. +For more details, visit the NetFPGA SUME project site. |