systemctl start mst
mst status
mlxconfig -d /dev/mst/mt4123_pciconf0 query
mlxconfig -d /dev/mst/mt4123_pciconf0 set LINK_TYPE_P1=2 


MLNX_OFED的驱动软件所下载地址为：
https://repo.oepkgs.net/openEuler/rpm/openEuler-20.03-LTS-SP1/extras-tgz/aarch64/MLNX_OFED_LINUX-5.1-2.5.2.0-openeuler20.03-aarch64-ext.tgz
安装步骤为：
tar xf MLNX_OFED_LINUX-5.1-2.5.2.0-openeuler20.03-aarch64-ext.tgz
cd MLNX_OFED_LINUX-5.1-2.5.2.0-openeuler20.03-aarch64-ext
./mlnxofedinstall --add-kernel-support
/etc/init.d/openibd restart
/etc/init.d/opensmd restart
systemctl stop firewalld  # 关闭防火墙
Ibdev2netdev