[PATCH net-next v3 4/4] net: thunderbolt: Allow reading link settings
From: Mika Westerberg <mika.westerberg@linux.intel.com>
Date: 2026-01-15 11:56:53
Subsystem:
networking drivers, the rest, thunderbolt network driver · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds, Mika Westerberg, Yehezkel Bernat
From: Ian MacDonald <redacted> In order to use Thunderbolt networking as part of bonding device it needs to support ->get_link_ksettings() ethtool operation, so that the bonding driver can read the link speed and the related attributes. Add support for this to the driver. Signed-off-by: Ian MacDonald <redacted> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> --- drivers/net/thunderbolt/main.c | 49 ++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+)
diff --git a/drivers/net/thunderbolt/main.c b/drivers/net/thunderbolt/main.c
index 57b226afeb84..7aae5d915a1e 100644
--- a/drivers/net/thunderbolt/main.c
+++ b/drivers/net/thunderbolt/main.c@@ -10,6 +10,7 @@ */ #include <linux/atomic.h> +#include <linux/ethtool.h> #include <linux/highmem.h> #include <linux/if_vlan.h> #include <linux/jhash.h>
@@ -1265,6 +1266,53 @@ static const struct net_device_ops tbnet_netdev_ops = { .ndo_get_stats64 = tbnet_get_stats64, }; +static int tbnet_get_link_ksettings(struct net_device *dev, + struct ethtool_link_ksettings *cmd) +{ + const struct tbnet *net = netdev_priv(dev); + const struct tb_xdomain *xd = net->xd; + int speed; + + ethtool_link_ksettings_zero_link_mode(cmd, supported); + ethtool_link_ksettings_zero_link_mode(cmd, advertising); + + /* Figure out the current link speed and width */ + switch (xd->link_speed) { + case 40: + speed = SPEED_80000; + break; + + case 20: + if (xd->link_width == 2) + speed = SPEED_40000; + else + speed = SPEED_20000; + break; + + case 10: + if (xd->link_width == 2) { + speed = SPEED_20000; + break; + } + fallthrough; + + default: + speed = SPEED_10000; + break; + } + + cmd->base.speed = speed; + cmd->base.duplex = DUPLEX_FULL; + cmd->base.autoneg = AUTONEG_DISABLE; + cmd->base.port = PORT_OTHER; + + return 0; +} + +static const struct ethtool_ops tbnet_ethtool_ops = { + .get_link_ksettings = tbnet_get_link_ksettings, +}; + static void tbnet_generate_mac(struct net_device *dev) { const struct tbnet *net = netdev_priv(dev);
@@ -1315,6 +1363,7 @@ static int tbnet_probe(struct tb_service *svc, const struct tb_service_id *id) strcpy(dev->name, "thunderbolt%d"); dev->netdev_ops = &tbnet_netdev_ops; + dev->ethtool_ops = &tbnet_ethtool_ops; /* ThunderboltIP takes advantage of TSO packets but instead of * segmenting them we just split the packet into Thunderbolt
--
2.50.1