netdev - esp-hw-offload support for VF of NVIDIA Mellanox ConnectX-6 Ethernet Adapter Cards

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Date:   Mon, 29 Mar 2021 16:42:27 +0800
From:   高钧浩 <gaojunhao0504@...il.com>
To:     borisp@...dia.com, saeedm@...dia.com
Cc:     netdev@...r.kernel.org, seven.wen@...oud.cn, junhao.gao@...oud.cn
Subject: esp-hw-offload support for VF of NVIDIA Mellanox ConnectX-6 Ethernet
 Adapter Cards

Hi Boris,Saeed

     I'm enabling esp-hw-offload for VF of NVIDIA Mellanox ConnectX-6
Ethernet Adapter Cards, but it doesn't work.
     Before I created VF, the esp-hw-offload function of CX-6 is on,
after I created VF, the esp-hw-offload function of VF doesn't inherit
the esp-hw-offload function of CX-6.
     Enable esp-hw-offload could refer to
https://docs.mellanox.com/display/OFEDv522200/IPsec+Crypto+Offload.

     Create VF steps as follows:
     modprobe mlx5_core
     echo 2 > /sys/class/net/net2/device/sriov_numvfs
     # lspci to get pci bdf number(example:0000:07:00.0)
     lspci -nn | grep Mellanox
     echo 0000:07:00.2 > /sys/bus/pci/drivers/mlx5_core/unbind
     echo 0000:07:00.3 > /sys/bus/pci/drivers/mlx5_core/unbind
     /etc/init.d/mst start
     mcra /dev/mst/mt4119_pciconf0  0x31500.17  0
     devlink dev eswitch set pci/0000:07:00.0  mode switchdev encap enable
     echo 0000:07:00.2 > /sys/bus/pci/drivers/mlx5_core/bind
     echo 0000:07:00.3 > /sys/bus/pci/drivers/mlx5_core/bind

     Then query the esp-hw-offload of VF:
     #firstly need to find the created VF(has the properties:
     bus-info: 0000:07:00.2, driver: mlx5_core)
     ethtool -i eth0 | grep esp-hw-offload
     esp-hw-offload: off [fixed]

Best Regards,
Junhao