Re: [RFC net-next 12/15] net/mlx5e: Add PSP steering in local NIC RX

Willem de Bruijn
2024-05-13T01:52:02Z

Jakub Kicinski wrote:
> From: Raed Salem <raeds@nvidia.com>
>
> Introduce decrypt FT, the RX error FT, and the default rules.
>
> The PSP (PSP) RX decrypt flow table is pointed by the TTC
> (Traffic Type Classifier) UDP steering rules.
> The decrypt flow table has two flow groups. The first flow group
> keeps the decrypt steering rule programmed always when PSP packet is
> recognized using the dedicated udp destenation port number 1000, if

typo: destination

> packet is decrypted then a PSP marker is set in metadata_regB[30].
> The second flow group has a default rule to forward all non-offloaded
> PSP packet to the TTC UDP default RSS TIR.
>
> The RX error flow table is the destination of the decrypt steering rules in
> the PSP RX decrypt flow table. It has two fixed rule one with single copy
> action that copies nisp_syndrome to metadata_regB[23:29]. The PSP marker
> and syndrome is used to filter out non-nisp packet and to return the PSP
> crypto offload status in Rx flow. The marker is used to identify such
> packet in driver so the driver could set SKB PSP metadata. The destination
> of RX error flow table is the TTC UDP default RSS TIR. The second rule will
> drop packets that failed to be decrypted (like in case illegal SPI or
> expired SPI is used).
>
> Signed-off-by: Raed Salem <raeds@nvidia.com>
> Signed-off-by: Rahul Rameshbabu <rrameshbabu@nvidia.com>
> Signed-off-by: Jakub Kicinski <kuba@kernel.org>