netdev - Re: [PATCH net-next 2/3] net: dpaa2-mac: add 1000BASE-X support

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Date:   Wed, 20 Jan 2021 22:23:56 +0000
From:   Ioana Ciornei <ioana.ciornei@....com>
To:     Russell King <rmk+kernel@...linux.org.uk>
CC:     Ioana Ciocoi Radulescu <ruxandra.radulescu@....com>,
        Andrew Lunn <andrew@...n.ch>,
        Heiner Kallweit <hkallweit1@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next 2/3] net: dpaa2-mac: add 1000BASE-X support

On Tue, Jan 19, 2021 at 03:36:03PM +0000, Russell King wrote:
> Now that pcs-lynx supports 1000BASE-X, add support for this interface
> mode to dpaa2-mac. pcs-lynx can be switched at runtime between SGMII
> and 1000BASE-X mode, so allow dpaa2-mac to switch between these as
> well.
> 
> This commit prepares the ground work for allowing 1G fiber connections
> to be used with DPAA2 on the SolidRun CEX7 platforms.
> 
> Signed-off-by: Russell King <rmk+kernel@...linux.org.uk>

Reviewed-by: Ioana Ciornei <ioana.ciornei@....com>


> ---
>  .../net/ethernet/freescale/dpaa2/dpaa2-mac.c  | 20 ++++++++++++++++---
>  1 file changed, 17 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c b/drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c
> index 69ad869446cf..3ddfb40eb5e4 100644
> --- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c
> +++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c
> @@ -79,10 +79,20 @@ static bool dpaa2_mac_phy_mode_mismatch(struct dpaa2_mac *mac,
>  					phy_interface_t interface)
>  {
>  	switch (interface) {
> +	/* We can switch between SGMII and 1000BASE-X at runtime with
> +	 * pcs-lynx
> +	 */
> +	case PHY_INTERFACE_MODE_SGMII:
> +	case PHY_INTERFACE_MODE_1000BASEX:
> +		if (mac->pcs &&
> +		    (mac->if_mode == PHY_INTERFACE_MODE_SGMII ||
> +		     mac->if_mode == PHY_INTERFACE_MODE_1000BASEX))
> +			return false;
> +		return interface != mac->if_mode;
> +
>  	case PHY_INTERFACE_MODE_10GBASER:
>  	case PHY_INTERFACE_MODE_USXGMII:
>  	case PHY_INTERFACE_MODE_QSGMII:
> -	case PHY_INTERFACE_MODE_SGMII:
>  	case PHY_INTERFACE_MODE_RGMII:
>  	case PHY_INTERFACE_MODE_RGMII_ID:
>  	case PHY_INTERFACE_MODE_RGMII_RXID:
> @@ -122,13 +132,17 @@ static void dpaa2_mac_validate(struct phylink_config *config,
>  		fallthrough;
>  	case PHY_INTERFACE_MODE_SGMII:
>  	case PHY_INTERFACE_MODE_QSGMII:
> +	case PHY_INTERFACE_MODE_1000BASEX:
>  	case PHY_INTERFACE_MODE_RGMII:
>  	case PHY_INTERFACE_MODE_RGMII_ID:
>  	case PHY_INTERFACE_MODE_RGMII_RXID:
>  	case PHY_INTERFACE_MODE_RGMII_TXID:
> -		phylink_set(mask, 10baseT_Full);
> -		phylink_set(mask, 100baseT_Full);
> +		phylink_set(mask, 1000baseX_Full);
>  		phylink_set(mask, 1000baseT_Full);
> +		if (state->interface == PHY_INTERFACE_MODE_1000BASEX)
> +			break;
> +		phylink_set(mask, 100baseT_Full);
> +		phylink_set(mask, 10baseT_Full);
>  		break;
>  	default:
>  		goto empty_set;
> -- 
> 2.20.1
>