netdev - Re: [PATCH net-next v2 1/4] vlan: Add MACsec offload operations for VLAN interface

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Date:   Wed, 5 Apr 2023 11:27:06 +0200
From:   Sabrina Dubroca <sd@...asysnail.net>
To:     Emeel Hakim <ehakim@...dia.com>
Cc:     davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com,
        edumazet@...gle.com, netdev@...r.kernel.org
Subject: Re: [PATCH net-next v2 1/4] vlan: Add MACsec offload operations for
 VLAN interface

2023-03-29, 15:21:04 +0300, Emeel Hakim wrote:
> Add support for MACsec offload operations for VLAN driver
> to allow offloading MACsec when VLAN's real device supports
> Macsec offload by forwarding the offload request to it.
> 
> Signed-off-by: Emeel Hakim <ehakim@...dia.com>
> ---
> V1 -> V2: - Consult vlan_features when adding NETIF_F_HW_MACSEC.
> 		  - Allow grep for the functions.
> 		  - Add helper function to get the macsec operation to allow the compiler to make some choice.
>  .../net/ethernet/mellanox/mlx5/core/en_main.c |   1 +
>  net/8021q/vlan_dev.c                          | 101 ++++++++++++++++++
>  2 files changed, 102 insertions(+)
> 
> diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
> index 6db1aff8778d..5ecef26e83c6 100644
> --- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
> +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
> @@ -5076,6 +5076,7 @@ static void mlx5e_build_nic_netdev(struct net_device *netdev)
>  
>  	netdev->vlan_features    |= NETIF_F_SG;
>  	netdev->vlan_features    |= NETIF_F_HW_CSUM;
> +	netdev->vlan_features    |= NETIF_F_HW_MACSEC;
>  	netdev->vlan_features    |= NETIF_F_GRO;
>  	netdev->vlan_features    |= NETIF_F_TSO;
>  	netdev->vlan_features    |= NETIF_F_TSO6;

IMO that shouldn't be part of this patch. One patch for VLAN to add
MACsec offload, then one for mlx5 to enable the feature.

-- 
Sabrina