[Bug 1112] MLX5: Not able to configure flows on PPPoE, stacked vlan tunnels & enable multiple tunnels at a time

[Bug 1112] MLX5: Not able to configure flows on PPPoE, stacked vlan tunnels & enable multiple tunnels at a time

[bugzilla]

https://bugs.dpdk.org/show_bug.cgi?id=1112

            Bug ID: 1112
           Summary: MLX5: Not able to configure flows on PPPoE, stacked
                    vlan tunnels & enable multiple tunnels at a time
           Product: DPDK
           Version: 22.03
          Hardware: All
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: core
          Assignee: dev@dpdk.org
          Reporter: cagniburto@vusra.com
  Target Milestone: ---

Hello Team,

We need to distribute packets on Inner-Hash5Tuple (IP-IP-Port-Port-Protocol) on
Rx queues of below mentioned packet hierarchies. 
we're using rte_flow to create rules on group 0 with action RSS.

Packet hierarchy:
Case 1:
ETH->VLAN1_QinQ->VLAN2_QinQ->VLAN3_QinQ->VLAN4_QinQ->PPPoE->PPP->IPv4/v6->TCP/UDP.

We tried following:
1. If we configure flow rte_flow_item pattern as ETH->VLAN->VLAN, API throws
error for multiple VLANs
2. If we configure ETH->ANY->PPPoES->.., API throws "item not supported"

Please suggest way to support the hierarchy.


Secondly, 
we want to enable GTP, IPinIP & other tunnels at same time, to enable GTP, mlx5
has configure to FLEX_PARSER_PROFILE_ENABLE=3 & to other value to support
another. 

Card Model: Connectx-6 Dx
OS: Ubuntu 20.04
Firmware: 22.32.2004

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