Merge branch 'net-call-for-phys_port_name-into-devlink-directly-if-possible'

Jiri Pirko says:

===================
net: call for phys_port_name into devlink directly if possible

phys_port_name may be assembled by a helper in devlink. It is currently
the case only for mlxsw driver. Benefit from the get_devlink_port ndo
and call into devlink directly from dev_get_phys_port_name(). That saves
the trip to the driver, simplifies the code and makes it similar to
recently introduced ethtool-devlink compat helpers.

Move bnxt, partly nfp and dsa to let devlink core generate the name too.
===================

Signed-off-by: David S. Miller <davem@davemloft.net>

16 files changed, 164 insertions, 94 deletions

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 0bb9d7b3a2b6..35e34e23ba33 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -10048,23 +10048,6 @@ static int bnxt_bridge_setlink(struct net_device *dev, struct nlmsghdr *nlh,
 	return rc;
 }
 
-static int bnxt_get_phys_port_name(struct net_device *dev, char *buf,
-				   size_t len)
-{
-	struct bnxt *bp = netdev_priv(dev);
-	int rc;
-
-	/* The PF and it's VF-reps only support the switchdev framework */
-	if (!BNXT_PF(bp))
-		return -EOPNOTSUPP;
-
-	rc = snprintf(buf, len, "p%d", bp->pf.port_id);
-
-	if (rc >= len)
-		return -EOPNOTSUPP;
-	return 0;
-}
-
 int bnxt_get_port_parent_id(struct net_device *dev,
 			    struct netdev_phys_item_id *ppid)
 {
@@ -10083,6 +10066,13 @@ int bnxt_get_port_parent_id(struct net_device *dev,
 	return 0;
 }
 
+static struct devlink_port *bnxt_get_devlink_port(struct net_device *dev)
+{
+	struct bnxt *bp = netdev_priv(dev);
+
+	return &bp->dl_port;
+}
+
 static const struct net_device_ops bnxt_netdev_ops = {
 	.ndo_open		= bnxt_open,
 	.ndo_start_xmit		= bnxt_start_xmit,
@@ -10115,7 +10105,7 @@ static const struct net_device_ops bnxt_netdev_ops = {
 	.ndo_bridge_getlink	= bnxt_bridge_getlink,
 	.ndo_bridge_setlink	= bnxt_bridge_setlink,
 	.ndo_get_port_parent_id	= bnxt_get_port_parent_id,
-	.ndo_get_phys_port_name = bnxt_get_phys_port_name
+	.ndo_get_devlink_port	= bnxt_get_devlink_port,
 };
 
 static void bnxt_remove_one(struct pci_dev *pdev)
diff --git a/drivers/net/ethernet/mellanox/mlxsw/core.c b/drivers/net/ethernet/mellanox/mlxsw/core.c
index e70bb673eeec..e55b4aa91e3b 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/core.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/core.c
@@ -1796,16 +1796,18 @@ enum devlink_port_type mlxsw_core_port_type_get(struct mlxsw_core *mlxsw_core,
 }
 EXPORT_SYMBOL(mlxsw_core_port_type_get);
 
-int mlxsw_core_port_get_phys_port_name(struct mlxsw_core *mlxsw_core,
-				       u8 local_port, char *name, size_t len)
+
+struct devlink_port *
+mlxsw_core_port_devlink_port_get(struct mlxsw_core *mlxsw_core,
+				 u8 local_port)
 {
 	struct mlxsw_core_port *mlxsw_core_port =
 					&mlxsw_core->ports[local_port];
 	struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port;
 
-	return devlink_port_get_phys_port_name(devlink_port, name, len);
+	return devlink_port;
 }
-EXPORT_SYMBOL(mlxsw_core_port_get_phys_port_name);
+EXPORT_SYMBOL(mlxsw_core_port_devlink_port_get);
 
 static void mlxsw_core_buf_dump_dbg(struct mlxsw_core *mlxsw_core,
 				    const char *buf, size_t size)
diff --git a/drivers/net/ethernet/mellanox/mlxsw/core.h b/drivers/net/ethernet/mellanox/mlxsw/core.h
index 74e95e943b24..e8c424da534c 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/core.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/core.h
@@ -176,8 +176,9 @@ void mlxsw_core_port_clear(struct mlxsw_core *mlxsw_core, u8 local_port,
 			   void *port_driver_priv);
 enum devlink_port_type mlxsw_core_port_type_get(struct mlxsw_core *mlxsw_core,
 						u8 local_port);
-int mlxsw_core_port_get_phys_port_name(struct mlxsw_core *mlxsw_core,
-				       u8 local_port, char *name, size_t len);
+struct devlink_port *
+mlxsw_core_port_devlink_port_get(struct mlxsw_core *mlxsw_core,
+				 u8 local_port);
 
 int mlxsw_core_schedule_dw(struct delayed_work *dwork, unsigned long delay);
 bool mlxsw_core_schedule_work(struct work_struct *work);
diff --git a/drivers/net/ethernet/mellanox/mlxsw/minimal.c b/drivers/net/ethernet/mellanox/mlxsw/minimal.c
index 0ee1656609f5..ec5f5a66b607 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/minimal.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/minimal.c
@@ -51,16 +51,6 @@ static int mlxsw_m_port_dummy_open_stop(struct net_device *dev)
 	return 0;
 }
 
-static int
-mlxsw_m_port_get_phys_port_name(struct net_device *dev, char *name, size_t len)
-{
-	struct mlxsw_m_port *mlxsw_m_port = netdev_priv(dev);
-	struct mlxsw_core *core = mlxsw_m_port->mlxsw_m->core;
-	u8 local_port = mlxsw_m_port->local_port;
-
-	return mlxsw_core_port_get_phys_port_name(core, local_port, name, len);
-}
-
 static int mlxsw_m_port_get_port_parent_id(struct net_device *dev,
 					   struct netdev_phys_item_id *ppid)
 {
@@ -73,11 +63,21 @@ static int mlxsw_m_port_get_port_parent_id(struct net_device *dev,
 	return 0;
 }
 
+static struct devlink_port *
+mlxsw_m_port_get_devlink_port(struct net_device *dev)
+{
+	struct mlxsw_m_port *mlxsw_m_port = netdev_priv(dev);
+	struct mlxsw_m *mlxsw_m = mlxsw_m_port->mlxsw_m;
+
+	return mlxsw_core_port_devlink_port_get(mlxsw_m->core,
+						mlxsw_m_port->local_port);
+}
+
 static const struct net_device_ops mlxsw_m_port_netdev_ops = {
 	.ndo_open		= mlxsw_m_port_dummy_open_stop,
 	.ndo_stop		= mlxsw_m_port_dummy_open_stop,
-	.ndo_get_phys_port_name	= mlxsw_m_port_get_phys_port_name,
 	.ndo_get_port_parent_id	= mlxsw_m_port_get_port_parent_id,
+	.ndo_get_devlink_port	= mlxsw_m_port_get_devlink_port,
 };
 
 static int mlxsw_m_get_module_info(struct net_device *netdev,
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
index eaf86c4c2f6c..8b9a6870dbc2 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
@@ -1254,16 +1254,6 @@ static int mlxsw_sp_port_kill_vid(struct net_device *dev,
 	return 0;
 }
 
-static int mlxsw_sp_port_get_phys_port_name(struct net_device *dev, char *name,
-					    size_t len)
-{
-	struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(dev);
-
-	return mlxsw_core_port_get_phys_port_name(mlxsw_sp_port->mlxsw_sp->core,
-						  mlxsw_sp_port->local_port,
-						  name, len);
-}
-
 static struct mlxsw_sp_port_mall_tc_entry *
 mlxsw_sp_port_mall_tc_entry_find(struct mlxsw_sp_port *port,
 				 unsigned long cookie) {
@@ -1726,6 +1716,16 @@ static int mlxsw_sp_port_get_port_parent_id(struct net_device *dev,
 	return 0;
 }
 
+static struct devlink_port *
+mlxsw_sp_port_get_devlink_port(struct net_device *dev)
+{
+	struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(dev);
+	struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
+
+	return mlxsw_core_port_devlink_port_get(mlxsw_sp->core,
+						mlxsw_sp_port->local_port);
+}
+
 static const struct net_device_ops mlxsw_sp_port_netdev_ops = {
 	.ndo_open		= mlxsw_sp_port_open,
 	.ndo_stop		= mlxsw_sp_port_stop,
@@ -1739,9 +1739,9 @@ static const struct net_device_ops mlxsw_sp_port_netdev_ops = {
 	.ndo_get_offload_stats	= mlxsw_sp_port_get_offload_stats,
 	.ndo_vlan_rx_add_vid	= mlxsw_sp_port_add_vid,
 	.ndo_vlan_rx_kill_vid	= mlxsw_sp_port_kill_vid,
-	.ndo_get_phys_port_name	= mlxsw_sp_port_get_phys_port_name,
 	.ndo_set_features	= mlxsw_sp_set_features,
 	.ndo_get_port_parent_id	= mlxsw_sp_port_get_port_parent_id,
+	.ndo_get_devlink_port	= mlxsw_sp_port_get_devlink_port,
 };
 
 static void mlxsw_sp_port_get_drvinfo(struct net_device *dev,
diff --git a/drivers/net/ethernet/mellanox/mlxsw/switchx2.c b/drivers/net/ethernet/mellanox/mlxsw/switchx2.c
index 568883fc40df..5312dc1f339b 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/switchx2.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/switchx2.c
@@ -379,16 +379,6 @@ mlxsw_sx_port_get_stats64(struct net_device *dev,
 	stats->tx_dropped	= tx_dropped;
 }
 
-static int mlxsw_sx_port_get_phys_port_name(struct net_device *dev, char *name,
-					    size_t len)
-{
-	struct mlxsw_sx_port *mlxsw_sx_port = netdev_priv(dev);
-
-	return mlxsw_core_port_get_phys_port_name(mlxsw_sx_port->mlxsw_sx->core,
-						  mlxsw_sx_port->local_port,
-						  name, len);
-}
-
 static int mlxsw_sx_port_get_port_parent_id(struct net_device *dev,
 					    struct netdev_phys_item_id *ppid)
 {
@@ -401,14 +391,24 @@ static int mlxsw_sx_port_get_port_parent_id(struct net_device *dev,
 	return 0;
 }
 
+static struct devlink_port *
+mlxsw_sx_port_get_devlink_port(struct net_device *dev)
+{
+	struct mlxsw_sx_port *mlxsw_sx_port = netdev_priv(dev);
+	struct mlxsw_sx *mlxsw_sx = mlxsw_sx_port->mlxsw_sx;
+
+	return mlxsw_core_port_devlink_port_get(mlxsw_sx->core,
+						mlxsw_sx_port->local_port);
+}
+
 static const struct net_device_ops mlxsw_sx_port_netdev_ops = {
 	.ndo_open		= mlxsw_sx_port_open,
 	.ndo_stop		= mlxsw_sx_port_stop,
 	.ndo_start_xmit		= mlxsw_sx_port_xmit,
 	.ndo_change_mtu		= mlxsw_sx_port_change_mtu,
 	.ndo_get_stats64	= mlxsw_sx_port_get_stats64,
-	.ndo_get_phys_port_name = mlxsw_sx_port_get_phys_port_name,
 	.ndo_get_port_parent_id	= mlxsw_sx_port_get_port_parent_id,
+	.ndo_get_devlink_port	= mlxsw_sx_port_get_devlink_port,
 };
 
 static void mlxsw_sx_port_get_drvinfo(struct net_device *dev,
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_app.h b/drivers/net/ethernet/netronome/nfp/nfp_app.h
index f8d422713705..a6fda07fce43 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_app.h
+++ b/drivers/net/ethernet/netronome/nfp/nfp_app.h
@@ -433,6 +433,6 @@ int nfp_app_nic_vnic_alloc(struct nfp_app *app, struct nfp_net *nn,
 int nfp_app_nic_vnic_init_phy_port(struct nfp_pf *pf, struct nfp_app *app,
 				   struct nfp_net *nn, unsigned int id);
 
-struct devlink *nfp_devlink_get_devlink(struct net_device *netdev);
+struct devlink_port *nfp_devlink_get_devlink_port(struct net_device *netdev);
 
 #endif
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_devlink.c b/drivers/net/ethernet/netronome/nfp/nfp_devlink.c
index cb59a18ec6a6..919da0d84fb4 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_devlink.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_devlink.c
@@ -386,13 +386,13 @@ void nfp_devlink_port_type_clear(struct nfp_port *port)
 	devlink_port_type_clear(&port->dl_port);
 }
 
-struct devlink *nfp_devlink_get_devlink(struct net_device *netdev)
+struct devlink_port *nfp_devlink_get_devlink_port(struct net_device *netdev)
 {
-	struct nfp_app *app;
+	struct nfp_port *port;
 
-	app = nfp_app_from_netdev(netdev);
-	if (!app)
+	port = nfp_port_from_netdev(netdev);
+	if (!port)
 		return NULL;
 
-	return priv_to_devlink(app->pf);
+	return &port->dl_port;
 }
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
index ad2f133bd545..99200b5dac76 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
@@ -3324,8 +3324,11 @@ nfp_net_get_phys_port_name(struct net_device *netdev, char *name, size_t len)
 	struct nfp_net *nn = netdev_priv(netdev);
 	int n;
 
+	/* If port is defined, devlink_port is registered and devlink core
+	 * is taking care of name formatting.
+	 */
 	if (nn->port)
-		return nfp_port_get_phys_port_name(netdev, name, len);
+		return -EOPNOTSUPP;
 
 	if (nn->dp.is_vf || nn->vnic_no_name)
 		return -EOPNOTSUPP;
@@ -3531,7 +3534,7 @@ const struct net_device_ops nfp_net_netdev_ops = {
 	.ndo_udp_tunnel_del	= nfp_net_del_vxlan_port,
 	.ndo_bpf		= nfp_net_xdp,
 	.ndo_get_port_parent_id	= nfp_port_get_port_parent_id,
-	.ndo_get_devlink	= nfp_devlink_get_devlink,
+	.ndo_get_devlink_port	= nfp_devlink_get_devlink_port,
 };
 
 /**
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_main.c b/drivers/net/ethernet/netronome/nfp/nfp_net_main.c
index f35278062476..986464d4a206 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_main.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_main.c
@@ -150,37 +150,39 @@ nfp_net_pf_init_vnic(struct nfp_pf *pf, struct nfp_net *nn, unsigned int id)
 
 	nn->id = id;
 
+	if (nn->port) {
+		err = nfp_devlink_port_register(pf->app, nn->port);
+		if (err)
+			return err;
+	}
+
 	err = nfp_net_init(nn);
 	if (err)
-		return err;
+		goto err_devlink_port_clean;
 
 	nfp_net_debugfs_vnic_add(nn, pf->ddir);
 
-	if (nn->port) {
-		err = nfp_devlink_port_register(pf->app, nn->port);
-		if (err)
-			goto err_dfs_clean;
+	if (nn->port)
 		nfp_devlink_port_type_eth_set(nn->port);
-	}
 
 	nfp_net_info(nn);
 
 	if (nfp_net_is_data_vnic(nn)) {
 		err = nfp_app_vnic_init(pf->app, nn);
 		if (err)
-			goto err_devlink_port_clean;
+			goto err_devlink_port_type_clean;
 	}
 
 	return 0;
 
-err_devlink_port_clean:
-	if (nn->port) {
+err_devlink_port_type_clean:
+	if (nn->port)
 		nfp_devlink_port_type_clear(nn->port);
-		nfp_devlink_port_unregister(nn->port);
-	}
-err_dfs_clean:
 	nfp_net_debugfs_dir_clean(&nn->debugfs_dir);
 	nfp_net_clean(nn);
+err_devlink_port_clean:
+	if (nn->port)
+		nfp_devlink_port_unregister(nn->port);
 	return err;
 }
 
@@ -223,12 +225,12 @@ static void nfp_net_pf_clean_vnic(struct nfp_pf *pf, struct nfp_net *nn)
 {
 	if (nfp_net_is_data_vnic(nn))
 		nfp_app_vnic_clean(pf->app, nn);
-	if (nn->port) {
+	if (nn->port)
 		nfp_devlink_port_type_clear(nn->port);
-		nfp_devlink_port_unregister(nn->port);
-	}
 	nfp_net_debugfs_dir_clean(&nn->debugfs_dir);
 	nfp_net_clean(nn);
+	if (nn->port)
+		nfp_devlink_port_unregister(nn->port);
 }
 
 static int nfp_net_pf_alloc_irqs(struct nfp_pf *pf)
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_repr.c b/drivers/net/ethernet/netronome/nfp/nfp_net_repr.c
index d2c803bb4e56..bf621674f583 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_repr.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_repr.c
@@ -273,7 +273,7 @@ const struct net_device_ops nfp_repr_netdev_ops = {
 	.ndo_set_features	= nfp_port_set_features,
 	.ndo_set_mac_address    = eth_mac_addr,
 	.ndo_get_port_parent_id	= nfp_port_get_port_parent_id,
-	.ndo_get_devlink	= nfp_devlink_get_devlink,
+	.ndo_get_devlink_port	= nfp_devlink_get_devlink_port,
 };
 
 void
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 166fdc0a78b4..78f5ec4ebf64 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1250,8 +1250,8 @@ struct devlink;
  *	that got dropped are freed/returned via xdp_return_frame().
  *	Returns negative number, means general error invoking ndo, meaning
  *	no frames were xmit'ed and core-caller will free all frames.
- * struct devlink *(*ndo_get_devlink)(struct net_device *dev);
- *	Get devlink instance associated with a given netdev.
+ * struct devlink_port *(*ndo_get_devlink_port)(struct net_device *dev);
+ *	Get devlink port instance associated with a given netdev.
  *	Called with a reference on the netdevice and devlink locks only,
  *	rtnl_lock is not held.
  */
@@ -1451,7 +1451,7 @@ struct net_device_ops {
 						u32 flags);
 	int			(*ndo_xsk_async_xmit)(struct net_device *dev,
 						      u32 queue_id);
-	struct devlink *	(*ndo_get_devlink)(struct net_device *dev);
+	struct devlink_port *	(*ndo_get_devlink_port)(struct net_device *dev);
 };
 
 /**
diff --git a/include/net/devlink.h b/include/net/devlink.h
index 03fb16f4fb6c..31d5cec4d06b 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -547,10 +547,20 @@ static inline struct devlink *priv_to_devlink(void *priv)
 	return container_of(priv, struct devlink, priv);
 }
 
+static inline struct devlink_port *
+netdev_to_devlink_port(struct net_device *dev)
+{
+	if (dev->netdev_ops->ndo_get_devlink_port)
+		return dev->netdev_ops->ndo_get_devlink_port(dev);
+	return NULL;
+}
+
 static inline struct devlink *netdev_to_devlink(struct net_device *dev)
 {
-	if (dev->netdev_ops->ndo_get_devlink)
-		return dev->netdev_ops->ndo_get_devlink(dev);
+	struct devlink_port *devlink_port = netdev_to_devlink_port(dev);
+
+	if (devlink_port)
+		return devlink_port->devlink;
 	return NULL;
 }
 
@@ -573,8 +583,6 @@ void devlink_port_attrs_set(struct devlink_port *devlink_port,
 			    enum devlink_port_flavour flavour,
 			    u32 port_number, bool split,
 			    u32 split_subport_number);
-int devlink_port_get_phys_port_name(struct devlink_port *devlink_port,
-				    char *name, size_t len);
 int devlink_sb_register(struct devlink *devlink, unsigned int sb_index,
 			u32 size, u16 ingress_pools_count,
 			u16 egress_pools_count, u16 ingress_tc_count,
@@ -729,6 +737,8 @@ devlink_health_reporter_state_update(struct devlink_health_reporter *reporter,
 void devlink_compat_running_version(struct net_device *dev,
 				    char *buf, size_t len);
 int devlink_compat_flash_update(struct net_device *dev, const char *file_name);
+int devlink_compat_phys_port_name_get(struct net_device *dev,
+				      char *name, size_t len);
 
 #else
 
@@ -743,6 +753,13 @@ devlink_compat_flash_update(struct net_device *dev, const char *file_name)
 	return -EOPNOTSUPP;
 }
 
+static inline int
+devlink_compat_phys_port_name_get(struct net_device *dev,
+				  char *name, size_t len)
+{
+	return -EOPNOTSUPP;
+}
+
 #endif
 
 #endif /* _NET_DEVLINK_H_ */
diff --git a/net/core/dev.c b/net/core/dev.c
index 9ca2d3abfd1a..9823b7713f79 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -146,6 +146,7 @@
 #include <net/udp_tunnel.h>
 #include <linux/net_namespace.h>
 #include <linux/indirect_call_wrapper.h>
+#include <net/devlink.h>
 
 #include "net-sysfs.h"
 
@@ -7877,10 +7878,14 @@ int dev_get_phys_port_name(struct net_device *dev,
 			   char *name, size_t len)
 {
 	const struct net_device_ops *ops = dev->netdev_ops;
+	int err;
 
-	if (!ops->ndo_get_phys_port_name)
-		return -EOPNOTSUPP;
-	return ops->ndo_get_phys_port_name(dev, name, len);
+	if (ops->ndo_get_phys_port_name) {
+		err = ops->ndo_get_phys_port_name(dev, name, len);
+		if (err != -EOPNOTSUPP)
+			return err;
+	}
+	return devlink_compat_phys_port_name_get(dev, name, len);
 }
 EXPORT_SYMBOL(dev_get_phys_port_name);
 
diff --git a/net/core/devlink.c b/net/core/devlink.c
index 37d01c39071e..dc3a99148ee7 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -5358,6 +5358,24 @@ static void __devlink_port_type_set(struct devlink_port *devlink_port,
 void devlink_port_type_eth_set(struct devlink_port *devlink_port,
 			       struct net_device *netdev)
 {
+	/* If driver registers devlink port, it should set devlink port
+	 * attributes accordingly so the compat functions are called
+	 * and the original ops are not used.
+	 */
+	if (netdev->netdev_ops->ndo_get_phys_port_name) {
+		/* Some drivers use the same set of ndos for netdevs
+		 * that have devlink_port registered and also for
+		 * those who don't. Make sure that ndo_get_phys_port_name
+		 * returns -EOPNOTSUPP here in case it is defined.
+		 * Warn if not.
+		 */
+		const struct net_device_ops *ops = netdev->netdev_ops;
+		char name[IFNAMSIZ];
+		int err;
+
+		err = ops->ndo_get_phys_port_name(netdev, name, sizeof(name));
+		WARN_ON(err != -EOPNOTSUPP);
+	}
 	__devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_ETH, netdev);
 }
 EXPORT_SYMBOL_GPL(devlink_port_type_eth_set);
@@ -5414,8 +5432,8 @@ void devlink_port_attrs_set(struct devlink_port *devlink_port,
 }
 EXPORT_SYMBOL_GPL(devlink_port_attrs_set);
 
-int devlink_port_get_phys_port_name(struct devlink_port *devlink_port,
-				    char *name, size_t len)
+static int __devlink_port_phys_port_name_get(struct devlink_port *devlink_port,
+					     char *name, size_t len)
 {
 	struct devlink_port_attrs *attrs = &devlink_port->attrs;
 	int n = 0;
@@ -5445,7 +5463,6 @@ int devlink_port_get_phys_port_name(struct devlink_port *devlink_port,
 
 	return 0;
 }
-EXPORT_SYMBOL_GPL(devlink_port_get_phys_port_name);
 
 int devlink_sb_register(struct devlink *devlink, unsigned int sb_index,
 			u32 size, u16 ingress_pools_count,
@@ -6459,6 +6476,24 @@ out:
 	return ret;
 }
 
+int devlink_compat_phys_port_name_get(struct net_device *dev,
+				      char *name, size_t len)
+{
+	struct devlink_port *devlink_port;
+
+	/* RTNL mutex is held here which ensures that devlink_port
+	 * instance cannot disappear in the middle. No need to take
+	 * any devlink lock as only permanent values are accessed.
+	 */
+	ASSERT_RTNL();
+
+	devlink_port = netdev_to_devlink_port(dev);
+	if (!devlink_port)
+		return -EOPNOTSUPP;
+
+	return __devlink_port_phys_port_name_get(devlink_port, name, len);
+}
+
 static int __init devlink_init(void)
 {
 	return genl_register_family(&devlink_nl_family);
diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index 6a8418dfa64f..80be8e86c82d 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -736,6 +736,13 @@ static int dsa_slave_get_phys_port_name(struct net_device *dev,
 {
 	struct dsa_port *dp = dsa_slave_to_port(dev);
 
+	/* For non-legacy ports, devlink is used and it takes
+	 * care of the name generation. This ndo implementation
+	 * should be removed with legacy support.
+	 */
+	if (dp->ds->devlink)
+		return -EOPNOTSUPP;
+
 	if (snprintf(name, len, "p%d", dp->index) >= len)
 		return -EINVAL;
 
@@ -1096,6 +1103,13 @@ int dsa_legacy_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
 	return dsa_port_fdb_del(dp, addr, vid);
 }
 
+static struct devlink_port *dsa_slave_get_devlink_port(struct net_device *dev)
+{
+	struct dsa_port *dp = dsa_slave_to_port(dev);
+
+	return dp->ds->devlink ? &dp->devlink_port : NULL;
+}
+
 static const struct net_device_ops dsa_slave_netdev_ops = {
 	.ndo_open	 	= dsa_slave_open,
 	.ndo_stop		= dsa_slave_close,
@@ -1119,6 +1133,7 @@ static const struct net_device_ops dsa_slave_netdev_ops = {
 	.ndo_get_port_parent_id	= dsa_slave_get_port_parent_id,
 	.ndo_vlan_rx_add_vid	= dsa_slave_vlan_rx_add_vid,
 	.ndo_vlan_rx_kill_vid	= dsa_slave_vlan_rx_kill_vid,
+	.ndo_get_devlink_port	= dsa_slave_get_devlink_port,
 };
 
 static struct device_type dsa_type = {