Re: [PATCH v1 1/2] net/dpaa2: revert inner RSS level support

Acked-by: Hemant Agrawal <[email protected]>

On 21-07-2026 15:26, Thomas Monjalon wrote:
> I'm waiting for an urgent reply from the maintainers here.
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> 20/07/2026 15:34, Maxime Leroy:
>> This reverts commit 618a06c53d479ae576ff01c7d274b10c60b3d3d5.
>>
>> RTE_ETH_RSS_LEVEL_INNERMOST was mapped to the innermost IP instance by
>> programming the IP key extracts with hdr_index = HDR_INDEX_LAST. The
>> hardware only resolves that index when several IP headers are stacked.
>> A non-tunnelled frame carries a single IP header, so the extract
>> resolves to nothing, the RSS hash is constant and every such frame is
>> steered to a single Rx queue.
>>
>> The ethdev API defines INNERMOST by encapsulation level, not by the
>> presence of a tunnel: a plain frame's innermost header is its only IP
>> header and must be hashed. The dpaa2 hardware cannot honour that and
>> keep true inner-only semantics for tunnelled traffic at the same time,
>> so the level cannot be implemented correctly as merged.
>>
>> Revert it. Hashing the outer plus the inner IP under the PMD default
>> level, which spreads both plain and tunnelled traffic, is added in a
>> follow-up.
>>
>> Signed-off-by: Maxime Leroy <[email protected]>
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