linux-kernel - Re: [PATCH] sfc: Export fibre-specific link modes for 1/10G

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Date:   Tue, 19 Oct 2021 20:18:06 +0100
From:   Martin Habets <habetsm.xilinx@...il.com>
To:     Erik Ekman <erik@...o.se>
Cc:     Edward Cree <ecree.xilinx@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] sfc: Export fibre-specific link modes for 1/10G

On Mon, Oct 18, 2021 at 08:37:08PM +0200, Erik Ekman wrote:
> These modes were added to ethtool.h in 5711a98221443 ("net: ethtool: add support
> for 1000BaseX and missing 10G link modes") back in 2016.
> 
> Only setting CR mode for 10G, similar to how 25/40/50/100G modes are set up.
> 
> Tested using SFN5122F-R7 (with 2 SFP+ ports) and a 1000BASE-BX10 SFP module.
> Before:
> 
> $ ethtool ext
> Settings for ext:
> 	Supported ports: [ FIBRE ]
> 	Supported link modes:   1000baseT/Full
> 	                        10000baseT/Full
> 	Supported pause frame use: Symmetric Receive-only
> 	Supports auto-negotiation: No
> 	Supported FEC modes: Not reported
> 	Advertised link modes:  Not reported
> 	Advertised pause frame use: No
> 	Advertised auto-negotiation: No
> 	Advertised FEC modes: Not reported
> 	Link partner advertised link modes:  Not reported
> 	Link partner advertised pause frame use: No
> 	Link partner advertised auto-negotiation: No
> 	Link partner advertised FEC modes: Not reported
> 	Speed: 1000Mb/s
> 	Duplex: Full
> 	Auto-negotiation: off
> 	Port: FIBRE
> 	PHYAD: 255
> 	Transceiver: internal
>         Current message level: 0x000020f7 (8439)
>                                drv probe link ifdown ifup rx_err tx_err hw
> 	Link detected: yes
> 
> After:
> 
> $ ethtool ext
> Settings for ext:
> 	Supported ports: [ FIBRE ]
> 	Supported link modes:   1000baseX/Full
> 	                        10000baseCR/Full
> 	Supported pause frame use: Symmetric Receive-only
> 	Supports auto-negotiation: No
> 	Supported FEC modes: Not reported
> 	Advertised link modes:  Not reported
> 	Advertised pause frame use: No
> 	Advertised auto-negotiation: No
> 	Advertised FEC modes: Not reported
> 	Link partner advertised link modes:  Not reported
> 	Link partner advertised pause frame use: No
> 	Link partner advertised auto-negotiation: No
> 	Link partner advertised FEC modes: Not reported
> 	Speed: 1000Mb/s
> 	Duplex: Full
> 	Auto-negotiation: off
> 	Port: FIBRE
> 	PHYAD: 255
> 	Transceiver: internal
> 	Supports Wake-on: g
> 	Wake-on: d
>         Current message level: 0x000020f7 (8439)
>                                drv probe link ifdown ifup rx_err tx_err hw
> 	Link detected: yes
> 
> Signed-off-by: Erik Ekman <erik@...o.se>

Acked-by: Martin Habets <habetsm.xilinx@...il.com>

> ---
>  drivers/net/ethernet/sfc/mcdi_port_common.c | 10 ++++++----
>  1 file changed, 6 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/net/ethernet/sfc/mcdi_port_common.c b/drivers/net/ethernet/sfc/mcdi_port_common.c
> index 4bd3ef8f3384..e84cdcb6a595 100644
> --- a/drivers/net/ethernet/sfc/mcdi_port_common.c
> +++ b/drivers/net/ethernet/sfc/mcdi_port_common.c
> @@ -133,9 +133,9 @@ void mcdi_to_ethtool_linkset(u32 media, u32 cap, unsigned long *linkset)
>  	case MC_CMD_MEDIA_QSFP_PLUS:
>  		SET_BIT(FIBRE);
>  		if (cap & (1 << MC_CMD_PHY_CAP_1000FDX_LBN))
> -			SET_BIT(1000baseT_Full);
> +			SET_BIT(1000baseX_Full);
>  		if (cap & (1 << MC_CMD_PHY_CAP_10000FDX_LBN))
> -			SET_BIT(10000baseT_Full);
> +			SET_BIT(10000baseCR_Full);
>  		if (cap & (1 << MC_CMD_PHY_CAP_40000FDX_LBN))
>  			SET_BIT(40000baseCR4_Full);
>  		if (cap & (1 << MC_CMD_PHY_CAP_100000FDX_LBN))
> @@ -192,9 +192,11 @@ u32 ethtool_linkset_to_mcdi_cap(const unsigned long *linkset)
>  		result |= (1 << MC_CMD_PHY_CAP_100FDX_LBN);
>  	if (TEST_BIT(1000baseT_Half))
>  		result |= (1 << MC_CMD_PHY_CAP_1000HDX_LBN);
> -	if (TEST_BIT(1000baseT_Full) || TEST_BIT(1000baseKX_Full))
> +	if (TEST_BIT(1000baseT_Full) || TEST_BIT(1000baseKX_Full) ||
> +	    TEST_BIT(1000baseX_Full))
>  		result |= (1 << MC_CMD_PHY_CAP_1000FDX_LBN);
> -	if (TEST_BIT(10000baseT_Full) || TEST_BIT(10000baseKX4_Full))
> +	if (TEST_BIT(10000baseT_Full) || TEST_BIT(10000baseKX4_Full) ||
> +	    TEST_BIT(10000baseCR_Full))
>  		result |= (1 << MC_CMD_PHY_CAP_10000FDX_LBN);
>  	if (TEST_BIT(40000baseCR4_Full) || TEST_BIT(40000baseKR4_Full))
>  		result |= (1 << MC_CMD_PHY_CAP_40000FDX_LBN);
> -- 
> 2.31.1