Helper script for setting up VF on SR-IOV enabled Mellanox ConnectX-3 HCA
$ git clone https://github.com/storpool/mlx4vf-helper
$ cd mlx4vf-helper
$ sudo cp mlx4vf-helper /sbin/
$ sudo cp mlx4vf-helper.conf /etc/mlx4vf-helper {interfaceName}
Create /sbin/ifup-local and place following lines
sudo cat >>/sbin/ifup-local <<EOF
#!/bin/bash
[ -x /sbin/mlx4vf-helper ] && /sbin/mlx4vf-helper "\$1"
EOF
chmod a+x /sbin/ifup-localAdd the following line in the configuration of the primary interface (/etc/network/interfaces)
post-up /sbin/mlx4vf-helper $IFACE
The BIOS might not inform the running kernel for SRIOV support. A workaround is to add intel_iommu=on on the kernel cmdline.
In case there is messages as the following in dmesg:
[ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
[ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
...
[53173.315232] mlx4_core 0000:01:00.0: Enabling SR-IOV with 2 VFs
[53173.315298] mlx4_core 0000:01:00.0: not enough MMIO resources for SR-IOV
[53173.315315] mlx4_core 0000:01:00.0: Failed to enable SR-IOV, continuing without SR-IOV (err = -12)
This is an indication that the BIOS is not allocating resources for SRIOV.
A workaround is to add also pci=realloc at kernel cmdline.
To enable the Virtual Function interfaces on Mellanox NIC create kernel module configuration file/etc/modprobe.d/mlx4_core.conf
and pass num_vf and probe_vf variables. For details check the kernel module arguments with modinfo.
For example to create one VF interface on the first port:
echo "options mlx4_core num_vfs=1 probe_vf=1" >/etc/modprobe.d/mlx4_core.confFor 2 port NIC with 4 VFs on each
echo "options mlx4_core probe_vf=4,4 num_vfs=4,4" >/etc/modprobe.d/mlx4_core.confFor 4 port NIC with 4 VFs on each
echo "options mlx4_core probe_vf=4,4,4,4 num_vfs=4,4,4,4" >/etc/modprobe.d/mlx4_core.confVFRENAME Default: VFRENAME=1 Rename the VF interfaces using the following tmplate. (set to empty string to disable renaming)
VFNAME_TEMPLATE Default: VFNAME_TEMPLATE="_PFNAME__vf_VFID_" _PFNAME_ - name of the primary interface _VFID_ - sequentional ID of the VF _VFIDX_ - the VF id associated in the driver For example the if there are 2 VF on eth2, their names will be eth2_vf0 and eth2_vf1
VF_UP_AFTER_RENAME Default: (unset) When VF interface renaming is set, we are bringing down the interface before renaming it. If this variable is set to anything the new interface will be set to up.
{vfname}_VLAN Set VLAN ID to the given VF interface. For example on the above setup of two VF on eth2 to have vlans 24 and 42:
eth2_vf0_VLAN=24
eth2_vf1_VLAN=42
When used with combination with StorPool the VF interface MAC address will be changed to follwing template
02:42:<sp_net_idx>:<vf_idx>:<SP_OURID_high_bits>:<SP_OURID_low_bits>
To enable additional logging to syslog unkoment/define DEBUG=yes in the /etc/mlx4vf-helper.conf
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