NAME

mlx5en — NVIDIA Mellanox ConnectX-4/5/6 [Dx/Ex/Lx] based 200Gb, 100Gb, 50Gb, 40Gb, 25Gb and 10Gb ethernet adapter driver

SYNOPSIS

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

To load the driver as a module at run-time, run the following command as root:

kldload mlx5en

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

mlx5en_load="YES"

DESCRIPTION

The mlx5en driver provides support for PCI Express Ethernet adapters based on ConnectX-4/5/6 [Dx, Ex and Lx variants]. The driver supports Jumbo Frames, Transmit and Receive checksum offload, TCP segmentation offload (TSO), Large Receive Offload (LRO), HW Large Receive Offload (HW LRO), VLAN tag insertion and extraction, VLAN checksum offload, VLAN TSO, hardware rate limiting (TXRTLMT), stateless VxLAN hardware offload for receive and transmit, HW TLS offload for transmit, Receive Side Steering (RSS) and numa(4) awareness.

The network interface name is mce<N> which corresponds to a PCI function, mlx_core<N>, where <N> is a number starting at zero. There is at most one network interface per PCI function.

For further information and questions related to hardware requirements, see https://www.mellanox.com.

HARDWARE

The mlx5en driver supports 200Gb, 100Gb, 50Gb, 40Gb, 25Gb and 10Gb ethernet adapters.

• ConnectX-6 supports 10/20/25/40/50/56/100Gb/200Gb/s speeds.
• ConnectX-5 supports 10/20/25/40/50/56/100Gb/s speeds.
• ConnectX-4 supports 10/20/25/40/50/56/100Gb/s speeds.
• ConnectX-4 LX supports 10/25/40/50Gb/s speeds and reduced power consumption.

CONFIGURATION

The mlx5en network interface is configured using ifconfig(8) and the sysctl(8) tree at dev.mce.<N>. All configurable entries are also tunables, and can be put directly into the loader.conf(5) for persistent configuration.

SUPPORT

For general information and support, go to the NVIDIA Mellanox networking support website at: https://www.mellanox.com.

If an issue is identified with this driver using a supported adapter, e-mail all the specific information related to the issue to <nbu-freebsd-drivers@nvidia.com>.

SEE ALSO

ifconfig(8)

HISTORY

The mlx5en device driver first appeared in FreeBSD 11.0.

AUTHORS

The mlx5en driver was written by NVIDIA Mellanox networking <nbu-freebsd-drivers@nvidia.com>.