linux-kernel - Re: [PATCH v6 RESEND net-next 5/5] net: enetc: add UDP segmentation offload support

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Message-ID: <Z1W2lp5jNPqJZi4C@shredder>
Date: Sun, 8 Dec 2024 17:09:10 +0200
From: Ido Schimmel <idosch@...sch.org>
To: Wei Fang <wei.fang@....com>
Cc: claudiu.manoil@....com, vladimir.oltean@....com, xiaoning.wang@....com,
	andrew+netdev@...n.ch, davem@...emloft.net, edumazet@...gle.com,
	kuba@...nel.org, pabeni@...hat.com, frank.li@....com,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	imx@...ts.linux.dev
Subject: Re: [PATCH v6 RESEND net-next 5/5] net: enetc: add UDP segmentation
 offload support

On Wed, Dec 04, 2024 at 01:29:32PM +0800, Wei Fang wrote:
> Set NETIF_F_GSO_UDP_L4 bit of hw_features and features because i.MX95
> enetc and LS1028A driver implements UDP segmentation.
> 
> - i.MX95 ENETC supports UDP segmentation via LSO.
> - LS1028A ENETC supports UDP segmentation since the commit 3d5b459ba0e3
> ("net: tso: add UDP segmentation support").
> 
> Signed-off-by: Wei Fang <wei.fang@....com>
> Reviewed-by: Frank Li <Frank.Li@....com>
> ---
> v2: rephrase the commit message
> v3: no changes
> v4: fix typo in commit message
> v5: no changes
> v6: no changes
> ---
>  drivers/net/ethernet/freescale/enetc/enetc_pf_common.c | 6 ++++--
>  drivers/net/ethernet/freescale/enetc/enetc_vf.c        | 6 ++++--
>  2 files changed, 8 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/net/ethernet/freescale/enetc/enetc_pf_common.c b/drivers/net/ethernet/freescale/enetc/enetc_pf_common.c
> index 82a67356abe4..76fc3c6fdec1 100644
> --- a/drivers/net/ethernet/freescale/enetc/enetc_pf_common.c
> +++ b/drivers/net/ethernet/freescale/enetc/enetc_pf_common.c
> @@ -110,11 +110,13 @@ void enetc_pf_netdev_setup(struct enetc_si *si, struct net_device *ndev,
>  	ndev->hw_features = NETIF_F_SG | NETIF_F_RXCSUM |
>  			    NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
>  			    NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_LOOPBACK |
> -			    NETIF_F_HW_CSUM | NETIF_F_TSO | NETIF_F_TSO6;
> +			    NETIF_F_HW_CSUM | NETIF_F_TSO | NETIF_F_TSO6 |
> +			    NETIF_F_GSO_UDP_L4;
>  	ndev->features = NETIF_F_HIGHDMA | NETIF_F_SG | NETIF_F_RXCSUM |
>  			 NETIF_F_HW_VLAN_CTAG_TX |
>  			 NETIF_F_HW_VLAN_CTAG_RX |
> -			 NETIF_F_HW_CSUM | NETIF_F_TSO | NETIF_F_TSO6;
> +			 NETIF_F_HW_CSUM | NETIF_F_TSO | NETIF_F_TSO6 |
> +			 NETIF_F_GSO_UDP_L4;
>  	ndev->vlan_features = NETIF_F_SG | NETIF_F_HW_CSUM |
>  			      NETIF_F_TSO | NETIF_F_TSO6;

I didn't see any wording about it in the commit message / cover letter
so I will ask: Any reason not to enable UDP segmentation offload on
upper VLAN devices by setting the feature in 'ndev->vlan_features'?

>  
> diff --git a/drivers/net/ethernet/freescale/enetc/enetc_vf.c b/drivers/net/ethernet/freescale/enetc/enetc_vf.c
> index 63d78b2b8670..3768752b6008 100644
> --- a/drivers/net/ethernet/freescale/enetc/enetc_vf.c
> +++ b/drivers/net/ethernet/freescale/enetc/enetc_vf.c
> @@ -145,11 +145,13 @@ static void enetc_vf_netdev_setup(struct enetc_si *si, struct net_device *ndev,
>  	ndev->hw_features = NETIF_F_SG | NETIF_F_RXCSUM |
>  			    NETIF_F_HW_VLAN_CTAG_TX |
>  			    NETIF_F_HW_VLAN_CTAG_RX |
> -			    NETIF_F_HW_CSUM | NETIF_F_TSO | NETIF_F_TSO6;
> +			    NETIF_F_HW_CSUM | NETIF_F_TSO | NETIF_F_TSO6 |
> +			    NETIF_F_GSO_UDP_L4;
>  	ndev->features = NETIF_F_HIGHDMA | NETIF_F_SG | NETIF_F_RXCSUM |
>  			 NETIF_F_HW_VLAN_CTAG_TX |
>  			 NETIF_F_HW_VLAN_CTAG_RX |
> -			 NETIF_F_HW_CSUM | NETIF_F_TSO | NETIF_F_TSO6;
> +			 NETIF_F_HW_CSUM | NETIF_F_TSO | NETIF_F_TSO6 |
> +			 NETIF_F_GSO_UDP_L4;
>  	ndev->vlan_features = NETIF_F_SG | NETIF_F_HW_CSUM |
>  			      NETIF_F_TSO | NETIF_F_TSO6;
>  
> -- 
> 2.34.1
> 
>