[PATCH] net: mana: Add get_link and get_link_ksettings in ethtool

[Erni Sri Satya Vennela]

Add support for the ethtool get_link and get_link_ksettings
operations. Display standard port information using ethtool.

Before the change:
$ethtool enP30832s1
>No data available

After the change:
$ethtool enP30832s1
>Settings for enP30832s1:
        Supported ports: [  ]
        Supported link modes:   Not reported
        Supported pause frame use: No
        Supports auto-negotiation: Yes
        Supported FEC modes: Not reported
        Advertised link modes:  Not reported
        Advertised pause frame use: No
        Advertised auto-negotiation: Yes
        Advertised FEC modes: Not reported
        Speed: Unknown!
        Duplex: Full
        Auto-negotiation: on
        Port: Direct Attach Copper
        PHYAD: 0
        Transceiver: internal
        Link detected: yes

Signed-off-by: Erni Sri Satya Vennela <er...@linux.microsoft.com>
Reviewed-by: Haiyang Zhang <haiya...@microsoft.com>
Reviewed-by: Shradha Gupta <shradhagu...@linux.microsoft.com>
---
 .../ethernet/microsoft/mana/mana_ethtool.c    | 20 +++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/drivers/net/ethernet/microsoft/mana/mana_ethtool.c 
b/drivers/net/ethernet/microsoft/mana/mana_ethtool.c
index 146d5db1792f..c2716d6cad36 100644
--- a/drivers/net/ethernet/microsoft/mana/mana_ethtool.c
+++ b/drivers/net/ethernet/microsoft/mana/mana_ethtool.c
@@ -369,6 +369,24 @@ static int mana_set_channels(struct net_device *ndev,
        return err;
 }
 
+static int mana_get_link_ksettings(struct net_device *ndev,
+                                  struct ethtool_link_ksettings *cmd)
+{
+       cmd->base.duplex = DUPLEX_FULL;
+       cmd->base.autoneg = AUTONEG_ENABLE;
+       cmd->base.port = PORT_DA;
+
+       ethtool_link_ksettings_zero_link_mode(cmd, supported);
+       ethtool_link_ksettings_zero_link_mode(cmd, advertising);
+
+       ethtool_link_ksettings_add_link_mode(cmd, supported,
+                                            Autoneg);
+       ethtool_link_ksettings_add_link_mode(cmd, advertising,
+                                            Autoneg);
+
+       return 0;
+}
+
 const struct ethtool_ops mana_ethtool_ops = {
        .get_ethtool_stats      = mana_get_ethtool_stats,
        .get_sset_count         = mana_get_sset_count,
@@ -380,4 +398,6 @@ const struct ethtool_ops mana_ethtool_ops = {
        .set_rxfh               = mana_set_rxfh,
        .get_channels           = mana_get_channels,
        .set_channels           = mana_set_channels,
+       .get_link_ksettings     = mana_get_link_ksettings,
+       .get_link               = ethtool_op_get_link,
 };
-- 
2.34.1