Re: [PATCH net-next v2 6/7] net: ti: icssg-prueth: Add multicast filtering support in HSR mode

[Roger Quadros <rogerq@kernel.org>]

On 13/08/2024 10:42, MD Danish Anwar wrote:
> Add support for multicast filtering in HSR mode
> 
> Signed-off-by: MD Danish Anwar <danishanwar@ti.com>
> ---
>  drivers/net/ethernet/ti/icssg/icssg_prueth.c | 38 +++++++++++++++++++-
>  1 file changed, 37 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/ti/icssg/icssg_prueth.c b/drivers/net/ethernet/ti/icssg/icssg_prueth.c
> index b32a2bff34dc..521e9f914459 100644
> --- a/drivers/net/ethernet/ti/icssg/icssg_prueth.c
> +++ b/drivers/net/ethernet/ti/icssg/icssg_prueth.c
> @@ -490,6 +490,36 @@ static int icssg_prueth_del_mcast(struct net_device *ndev, const u8 *addr)
>  	return 0;
>  }
>  
> +static int icssg_prueth_hsr_add_mcast(struct net_device *ndev, const u8 *addr)
> +{
> +	struct prueth_emac *emac = netdev_priv(ndev);
> +	struct prueth *prueth = emac->prueth;
> +
> +	icssg_fdb_add_del(emac, addr, prueth->default_vlan,
> +			  ICSSG_FDB_ENTRY_P0_MEMBERSHIP |
> +			  ICSSG_FDB_ENTRY_P1_MEMBERSHIP |
> +			  ICSSG_FDB_ENTRY_P2_MEMBERSHIP |
> +			  ICSSG_FDB_ENTRY_BLOCK, true);
> +
> +	icssg_vtbl_modify(emac, emac->port_vlan, BIT(emac->port_id),
> +			  BIT(emac->port_id), true);
> +	return 0;
> +}
> +
> +static int icssg_prueth_hsr_del_mcast(struct net_device *ndev, const u8 *addr)
> +{
> +	struct prueth_emac *emac = netdev_priv(ndev);
> +	struct prueth *prueth = emac->prueth;
> +
> +	icssg_fdb_add_del(emac, addr, prueth->default_vlan,
> +			  ICSSG_FDB_ENTRY_P0_MEMBERSHIP |
> +			  ICSSG_FDB_ENTRY_P1_MEMBERSHIP |
> +			  ICSSG_FDB_ENTRY_P2_MEMBERSHIP |
> +			  ICSSG_FDB_ENTRY_BLOCK, false);
> +
> +	return 0;
> +}
> +
>  /**
>   * emac_ndo_open - EMAC device open
>   * @ndev: network adapter device
> @@ -651,6 +681,7 @@ static int emac_ndo_stop(struct net_device *ndev)
>  	icssg_class_disable(prueth->miig_rt, prueth_emac_slice(emac));
>  
>  	__dev_mc_unsync(ndev, icssg_prueth_del_mcast);

Above unsync call will already remove all MC addresses so nothing
is left to unsync in the below unsync call.
> +	__dev_mc_unsync(ndev, icssg_prueth_hsr_del_mcast);

Do you have to use an if/else like you do while calling __dev_mc_sync?

>  
>  	atomic_set(&emac->tdown_cnt, emac->tx_ch_num);
>  	/* ensure new tdown_cnt value is visible */
> @@ -728,7 +759,12 @@ static void emac_ndo_set_rx_mode_work(struct work_struct *work)
>  		return;
>  	}
>  
> -	__dev_mc_sync(ndev, icssg_prueth_add_mcast, icssg_prueth_del_mcast);
> +	if (emac->prueth->is_hsr_offload_mode)
> +		__dev_mc_sync(ndev, icssg_prueth_hsr_add_mcast,
> +			      icssg_prueth_hsr_del_mcast);
> +	else
> +		__dev_mc_sync(ndev, icssg_prueth_add_mcast,
> +			      icssg_prueth_del_mcast);
>  }
>  
>  /**

-- 
cheers,
-roger