On Wed, 24 Jun 2020 at 18:59, Vladimir Oltean <olte...@gmail.com> wrote:
>
> From: Vladimir Oltean <vladimir.olt...@nxp.com>
>
> Ping tested:
>
>   [   11.808455] mscc_felix 0000:00:00.5 swp0: Link is Up - 1Gbps/Full - flow 
> control rx/tx
>   [   11.816497] IPv6: ADDRCONF(NETDEV_CHANGE): swp0: link becomes ready
>
>   [root@LS1028ARDB ~] # ethtool -s swp0 advertise 0x4
>   [   18.844591] mscc_felix 0000:00:00.5 swp0: Link is Down
>   [   22.048337] mscc_felix 0000:00:00.5 swp0: Link is Up - 100Mbps/Half - 
> flow control off
>
>   [root@LS1028ARDB ~] # ip addr add 192.168.1.1/24 dev swp0
>
>   [root@LS1028ARDB ~] # ping 192.168.1.2
>   PING 192.168.1.2 (192.168.1.2): 56 data bytes
>   (...)
>   ^C--- 192.168.1.2 ping statistics ---
>   3 packets transmitted, 3 packets received, 0% packet loss
>   round-trip min/avg/max = 0.383/0.611/1.051 ms
>
>   [root@LS1028ARDB ~] # ethtool -s swp0 advertise 0x10
>   [  355.637747] mscc_felix 0000:00:00.5 swp0: Link is Down
>   [  358.788034] mscc_felix 0000:00:00.5 swp0: Link is Up - 1Gbps/Half - flow 
> control off
>
>   [root@LS1028ARDB ~] # ping 192.168.1.2
>   PING 192.168.1.2 (192.168.1.2): 56 data bytes
>   (...)
>   ^C
>   --- 192.168.1.2 ping statistics ---
>   16 packets transmitted, 16 packets received, 0% packet loss
>   round-trip min/avg/max = 0.301/0.384/1.138 ms
>
> Signed-off-by: Vladimir Oltean <vladimir.olt...@nxp.com>
> Reviewed-by: Florian Fainelli <f.faine...@gmail.com>
> ---
> This is a resend (no changes) of:
> https://patchwork.ozlabs.org/project/netdev/patch/20200531122640.1375715-12-olte...@gmail.com/
> (which in itself was a resend, link to original in that link)
>
> It was extracted out of that series since that's now entangled with
> other development, but this could be applied separately.
>
>  drivers/net/dsa/ocelot/felix.c         |  4 +++-
>  drivers/net/dsa/ocelot/felix_vsc9959.c | 13 ++++++++-----
>  2 files changed, 11 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/net/dsa/ocelot/felix.c b/drivers/net/dsa/ocelot/felix.c
> index 25046777c993..55b4129a1f9d 100644
> --- a/drivers/net/dsa/ocelot/felix.c
> +++ b/drivers/net/dsa/ocelot/felix.c
> @@ -194,14 +194,16 @@ static void felix_phylink_validate(struct dsa_switch 
> *ds, int port,
>                 return;
>         }
>
> -       /* No half-duplex. */
>         phylink_set_port_modes(mask);
>         phylink_set(mask, Autoneg);
>         phylink_set(mask, Pause);
>         phylink_set(mask, Asym_Pause);
>         phylink_set(mask, 10baseT_Full);
> +       phylink_set(mask, 10baseT_Half);
>         phylink_set(mask, 100baseT_Full);
> +       phylink_set(mask, 100baseT_Half);
>         phylink_set(mask, 1000baseT_Full);
> +       phylink_set(mask, 1000baseT_Half);
>
>         if (state->interface == PHY_INTERFACE_MODE_INTERNAL ||
>             state->interface == PHY_INTERFACE_MODE_2500BASEX ||
> diff --git a/drivers/net/dsa/ocelot/felix_vsc9959.c 
> b/drivers/net/dsa/ocelot/felix_vsc9959.c
> index 2067776773f7..f5e8df584073 100644
> --- a/drivers/net/dsa/ocelot/felix_vsc9959.c
> +++ b/drivers/net/dsa/ocelot/felix_vsc9959.c
> @@ -817,12 +817,12 @@ static void vsc9959_pcs_init_sgmii(struct phy_device 
> *pcs,
>
>                 phy_write(pcs, MII_BMCR, BMCR_ANRESTART | BMCR_ANENABLE);
>         } else {
> +               u16 duplex = 0;
>                 int speed;
>
> -               if (state->duplex == DUPLEX_HALF) {
> -                       phydev_err(pcs, "Half duplex not supported\n");
> -                       return;
> -               }
> +               if (state->duplex == DUPLEX_FULL)
> +                       duplex = BMCR_FULLDPLX;
> +
>                 switch (state->speed) {
>                 case SPEED_1000:
>                         speed = ENETC_PCS_SPEED_1000;
> @@ -848,7 +848,7 @@ static void vsc9959_pcs_init_sgmii(struct phy_device *pcs,
>                 /* Yes, not a mistake: speed is given by IF_MODE. */
>                 phy_write(pcs, MII_BMCR, BMCR_RESET |
>                                          BMCR_SPEED1000 |
> -                                        BMCR_FULLDPLX);
> +                                        duplex);
>         }
>  }
>
> @@ -925,8 +925,11 @@ static void vsc9959_pcs_init(struct ocelot *ocelot, int 
> port,
>                                ARRAY_SIZE(phy_basic_ports_array),
>                                pcs->supported);
>         linkmode_set_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, pcs->supported);
> +       linkmode_set_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, pcs->supported);
>         linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, pcs->supported);
> +       linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, pcs->supported);
>         linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, 
> pcs->supported);
> +       linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, 
> pcs->supported);
>         if (pcs->interface == PHY_INTERFACE_MODE_2500BASEX ||
>             pcs->interface == PHY_INTERFACE_MODE_USXGMII)
>                 linkmode_set_bit(ETHTOOL_LINK_MODE_2500baseX_Full_BIT,
> --
> 2.25.1
>

Please don't merge this patch. I need to make some changes to it.

Thanks,
-Vladimir

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