net/mlx5: no RX with VLAN filter offload set

net/mlx5: no RX with VLAN filter offload set

[Rohit Kumar]

Hello,


DPDK: 19.11

Driver: mlx5

OS: CentOS Linux release 7.9.2009 (Kernel: 3.10.0-1160.66.1.el7.x86_64)

Iface: Mellanox Technologies MT27710 Family [ConnectX-4 Lx Virtual Function]

I am bringing-up our dpdk based L3 forwarding app in VM on Openshift
redhat platform. It has both RX and TX HW offloads enabled, including
VLAN filtering (DEV_RX_OFFLOAD_VLAN_FILTER). VLAN registers successfully
in the VF - however no packets are getting received in with the
registered VLAN. RX-packet counter doesn't increment and there are no
errors reported in stats, or even in logs with driver debug logging
enabled via log-level="mlx5,8".

Port ID 0 stats, rxPkts: 27, txPkts: 107, rxBytes: 1524, txBytes: 10366,
missed: 0, rxErrors: 0, txErrors: 0, rx_nombuf: 0
Port ID 0 stats, rxPkts: 27, txPkts: 112, rxBytes: 1524, txBytes: 10738,
missed: 0, rxErrors: 0, txErrors: 0, rx_nombuf: 0
Port ID 0 stats, rxPkts: 27, txPkts: 122, rxBytes: 1524, txBytes: 11410,
missed: 0, rxErrors: 0, txErrors: 0, rx_nombuf: 0

When no VLAN is registered or vlan filtering offload is disabled, then
IP unicast, broadcast and multicast packets are received, but no VLAN
packet, which means VLAN filtering offload doesn’t work. Result from
dpdk 17.11 testing is also same. Does anyone noticed or reported such
problem? Any help or pointer will be appreciated.


Thanks,
Rohit

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