DPDK Flex Item on BlueField3

[francisco.wilken]

I am trying to use the DPDK flex item feature on bluefield3, which should be supported according to this link: https://doc.dpdk.org/guides/nics/mlx5.html

However, when I try it using dpdk-testpmd, I get the following error.

testpmd> flow flex_item create 0 0 flex.json
Header Mode: 0
port-0: flex item #0 creation failed: unsupported header length field mode (FIXED)

Here is firmware configuration for reference: mlxconfig for port 0:

        FLEX_PARSER_PROFILE_ENABLE                  4                   
        PROG_PARSE_GRAPH                            True(1) 

It matches the recomendation here: https://doc.dpdk.org/guides/platform/mlx5.html#mlx5-firmware-config

Is there any hardware configuration I could be missing that is causing this error?

Here is the json for reference, but I get the crash no matter how i change the json.

{
   "next_header": { "field_mode": "FIELD_MODE_FIXED", "field_size": 16},
   "next_protocol": {"field_size": 8, "field_base": 72},
   "sample_data": [
      { "field_mode": "FIELD_MODE_FIXED", "field_size": 32, "field_base": 0}
   ],
   "input_link": [
      {"item": "eth type is 0x0800"}

   ],
   "output_link": [
   ]
}

[xiaofengl]

Are you use on HOST/ARM? And what mode, DPU/NIC?

I suppose it support on HOST NIC mode.

[francisco.wilken]

I am using it on Arm cores, DPU Mode. DPDK runs on arm cores, documentation shows no reason why it shouldn’t work on them. Any suggestions on how to make it work?