netdev - ESP RSS support for NVIDIA Mellanox ConnectX-6 Ethernet Adapter Cards

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Date:   Mon, 29 Mar 2021 12:33:58 +0800
From:   高钧浩 <gaojunhao0504@...il.com>
To:     borisp@...dia.com, saeedm@...dia.com
Cc:     netdev@...r.kernel.org, seven.wen@...oud.cn, junhao.gao@...oud.cn
Subject: ESP RSS support for NVIDIA Mellanox ConnectX-6 Ethernet Adapter Cards

Hi borisp, saeedm

     I have seen mlx5 driver in 5.12.0-rc4 kernel, then find that
mlx5e_set_rss_hash_opt only support tcp4/udp4/tcp6/udp6. So mlx5
kernel driver doesn't support esp4 rss? Then do you have any plan to
support esp4 or other latest mlx5 driver have supported esp4? Then
does NVIDIA Mellanox ConnectX-6 Ethernet Adapter Cards support esp4
rss in hardware?

static int mlx5e_set_rss_hash_opt(struct mlx5e_priv *priv,
                 struct ethtool_rxnfc *nfc)
{
    int inlen = MLX5_ST_SZ_BYTES(modify_tir_in);
    enum mlx5e_traffic_types tt;
    u8 rx_hash_field = 0;
    void *in;
    tt = flow_type_to_traffic_type(nfc->flow_type);
    if (tt == MLX5E_NUM_INDIR_TIRS)
        return -EINVAL;
    /* RSS does not support anything other than hashing to queues
     * on src IP, dest IP, TCP/UDP src port and TCP/UDP dest
     * port.
     */
    if (nfc->flow_type != TCP_V4_FLOW &&
      nfc->flow_type != TCP_V6_FLOW &&
      nfc->flow_type != UDP_V4_FLOW &&
      nfc->flow_type != UDP_V6_FLOW)
        return -EOPNOTSUPP;

Best Regards,
Junhao