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: 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
        Speed: Unknown!
        Duplex: Full
        Auto-negotiation: off
        Port: Other
        PHYAD: 0
        Transceiver: internal
        Link detected: yes

Signed-off-by: Erni Sri Satya Vennela <[email protected]>
Reviewed-by: Haiyang Zhang <[email protected]>
Reviewed-by: Shradha Gupta <[email protected]>
---
Changes in v2:
* Remove support for displaying auto-negotiation details
* Change PORT_DA to PORT_OTHER
---
 drivers/net/ethernet/microsoft/mana/mana_ethtool.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/net/ethernet/microsoft/mana/mana_ethtool.c 
b/drivers/net/ethernet/microsoft/mana/mana_ethtool.c
index dc3864377538..349f11bf8e64 100644
--- a/drivers/net/ethernet/microsoft/mana/mana_ethtool.c
+++ b/drivers/net/ethernet/microsoft/mana/mana_ethtool.c
@@ -443,6 +443,15 @@ static int mana_set_ringparam(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.port = PORT_OTHER;
+
+       return 0;
+}
+
 const struct ethtool_ops mana_ethtool_ops = {
        .get_ethtool_stats      = mana_get_ethtool_stats,
        .get_sset_count         = mana_get_sset_count,
@@ -456,4 +465,6 @@ const struct ethtool_ops mana_ethtool_ops = {
        .set_channels           = mana_set_channels,
        .get_ringparam          = mana_get_ringparam,
        .set_ringparam          = mana_set_ringparam,
+       .get_link_ksettings     = mana_get_link_ksettings,
+       .get_link               = ethtool_op_get_link,
 };
-- 
2.34.1


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