[PATCH net-next 10/13] net: phy: phy_link_topology: Add a helper to retrieve ports

Maxime Chevallier
2026-01-27T13:42:45Z

In order to allow netlink access to phy_ports, let's add a helper to
retrieve them. When handling a port coming from phy_link_topology, the
caller must hold rtnl until it's done with it.

Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
---
include/linux/phy_link_topology.h | 16 ++++++++++++++++
1 file changed, 16 insertions(+)

diff --git a/include/linux/phy_link_topology.h b/include/linux/phy_link_topology.h
index 66bceff72b19..d5f8f20c5d32 100644
--- a/include/linux/phy_link_topology.h
+++ b/include/linux/phy_link_topology.h
@@ -66,6 +66,17 @@ phy_link_topo_get_phy(struct net_device *dev, u32 phyindex)
return NULL;
}

+static inline struct phy_port *
+phy_link_topo_get_port(struct net_device *dev, u32 port_id)
+{
+ struct phy_link_topology *topo = dev->link_topo;
+
+ if (!topo)
+ return NULL;
+
+ return xa_load(&topo->ports, port_id);
+}
+
#else
static inline int phy_link_topo_add_phy(struct net_device *dev,
struct phy_device *phy,
@@ -95,6 +106,11 @@ phy_link_topo_get_phy(struct net_device *dev, u32 phyindex)
{
return NULL;
}
+
+phy_link_topo_get_port(struct net_device *dev, u32 port_id)
+{
+ return NULL;
+}
#endif

#endif /* __PHY_LINK_TOPOLOGY_H */
--
2.49.0