[PATCH] net/mlx5: add RSS TIR registration API

[Raslan Darawsheh]

Hi,


On 08/01/2026 10:12 AM, Shani Peretz wrote:
> mlx5 PMD is a bifurcated driver, which uses rdma-core APIs to
> communicate with HW instead of UIO or VFIO directly.
> 
> It is possible for external libraries built on rdma-core to steer
> traffic to DPDK-managed Rx queues using mlx5dv flow API. This
> requires access to TIR object handles.
> 
> TIR (Transport Interface Receive) is a hardware object that defines
> how incoming packets are distributed across Rx queues. It encodes
> the complete RSS configuration including the hash function type,
> hash key, set of destination queues, and which packet fields
> (IP addresses, ports, etc.) participate in the hash calculation.
> When a flow rule uses a TIR as its destination, the hardware applies
> this RSS configuration to matching packets.
> 
> Add the following functions to mlx5 PMD private API:
> 
> - rte_pmd_mlx5_rss_tir_register(): Create a TIR DevX object based on
>    the provided RSS configuration. The returned TIR handle can be used
>    as a destination action in mlx5dv flow steering APIs from rdma-core.
> 
> - rte_pmd_mlx5_rss_tir_unregister(): Release the TIR object when no
>    longer needed.
> 
> Signed-off-by: Shani Peretz <shperetz at nvidia.com>
> Acked-by: Dariusz Sosnowski <dsosnowski at nvidia.com>

Patch applied to next-net-mlx,

Kindest regards
Raslan Darawsheh