Subject: Re: [PATCH net-next 1/6] net: airoha: Introduce airoha_gdm_dev struct

From: Alexander Lobakin <[email-masked]>
Date: Thu, 28 May 2026 15:42:18 +0200

From: Lorenzo Bianconi <[email-masked]>
Date: Wed, 27 May 2026 12:21:15 +0200

> EN7581 and AN7583 SoCs support connecting multiple external SerDes to GDM3
> or GDM4 ports via a hw arbiter that manages the traffic in a TDM manner.
> As a result multiple net_devices can connect to the same GDM{3,4} port
> and there is a theoretical "1:n" relation between GDM port and
> net_devices.
> Introduce airoha_gdm_dev struct to collect net_device related info (e.g.
> net_device and external phy pointer). Please note this is just a
> preliminary patch and we are still supporting a single net_device for
> each GDM port. Subsequent patches will add support for multiple net_devices
> connected to the same GDM port.
> 
> Tested-by: Xuegang Lu <[email-masked]>
> Signed-off-by: Lorenzo Bianconi <[email-masked]>

[...]

> diff --git a/drivers/net/ethernet/airoha/airoha_eth.h b/drivers/net/ethernet/airoha/airoha_eth.h
> index d3781103abb5..c78cabbec753 100644
> --- a/drivers/net/ethernet/airoha/airoha_eth.h
> +++ b/drivers/net/ethernet/airoha/airoha_eth.h
> @@ -535,10 +535,15 @@ struct airoha_qdma {
>  	struct airoha_queue q_rx[AIROHA_NUM_RX_RING];
>  };
>  
> +struct airoha_gdm_dev {
> +	struct airoha_gdm_port *port;
> +	struct net_device *dev;

Nit: we now have priv_to_netdev() (I hope I remember its name
correctly), so that we no longer need to store a netdev backpointer in
netdev_priv structures.
Just an option, up to you.

> +	struct airoha_eth *eth;
> +};
> +
>  struct airoha_gdm_port {
>  	struct airoha_qdma *qdma;
> -	struct airoha_eth *eth;
> -	struct net_device *dev;
> +	struct airoha_gdm_dev *dev;
>  	int id;
>  	int nbq;
>  
Thanks,
Olek