devlink: pass devlink_port to port_split / port_unsplit callbacks

Now that devlink ports are protected by the instance lock
it seems natural to pass devlink_port as an argument to
the port_split / port_unsplit callbacks.

This should save the drivers from doing a lookup.

In theory drivers may have supported unsplitting ports
which were not registered prior to this change.

Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Tested-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

4 files changed, 21 insertions, 46 deletions

diff --git a/drivers/net/ethernet/mellanox/mlxsw/core.c b/drivers/net/ethernet/mellanox/mlxsw/core.c
index e2a6a759eb6c..b13e0f8d232a 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/core.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/core.c
@@ -1217,36 +1217,37 @@ static void mlxsw_core_fw_params_unregister(struct mlxsw_core *mlxsw_core)
 				  ARRAY_SIZE(mlxsw_core_fw_devlink_params));
 }
 
+static void *__dl_port(struct devlink_port *devlink_port)
+{
+	return container_of(devlink_port, struct mlxsw_core_port, devlink_port);
+}
+
 static int mlxsw_devlink_port_split(struct devlink *devlink,
-				    unsigned int port_index,
+				    struct devlink_port *port,
 				    unsigned int count,
 				    struct netlink_ext_ack *extack)
 {
+	struct mlxsw_core_port *mlxsw_core_port = __dl_port(port);
 	struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
 
-	if (port_index >= mlxsw_core->max_ports) {
-		NL_SET_ERR_MSG_MOD(extack, "Port index exceeds maximum number of ports");
-		return -EINVAL;
-	}
 	if (!mlxsw_core->driver->port_split)
 		return -EOPNOTSUPP;
-	return mlxsw_core->driver->port_split(mlxsw_core, port_index, count,
-					      extack);
+	return mlxsw_core->driver->port_split(mlxsw_core,
+					      mlxsw_core_port->local_port,
+					      count, extack);
 }
 
 static int mlxsw_devlink_port_unsplit(struct devlink *devlink,
-				      unsigned int port_index,
+				      struct devlink_port *port,
 				      struct netlink_ext_ack *extack)
 {
+	struct mlxsw_core_port *mlxsw_core_port = __dl_port(port);
 	struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
 
-	if (port_index >= mlxsw_core->max_ports) {
-		NL_SET_ERR_MSG_MOD(extack, "Port index exceeds maximum number of ports");
-		return -EINVAL;
-	}
 	if (!mlxsw_core->driver->port_unsplit)
 		return -EOPNOTSUPP;
-	return mlxsw_core->driver->port_unsplit(mlxsw_core, port_index,
+	return mlxsw_core->driver->port_unsplit(mlxsw_core,
+						mlxsw_core_port->local_port,
 						extack);
 }
 
@@ -1280,11 +1281,6 @@ mlxsw_devlink_sb_pool_set(struct devlink *devlink,
 					 extack);
 }
 
-static void *__dl_port(struct devlink_port *devlink_port)
-{
-	return container_of(devlink_port, struct mlxsw_core_port, devlink_port);
-}
-
 static int mlxsw_devlink_port_type_set(struct devlink_port *devlink_port,
 				       enum devlink_port_type port_type)
 {
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_devlink.c b/drivers/net/ethernet/netronome/nfp/nfp_devlink.c
index 6bd6f4a67c30..48b95566b52b 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_devlink.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_devlink.c
@@ -26,12 +26,11 @@ nfp_devlink_fill_eth_port(struct nfp_port *port,
 }
 
 static int
-nfp_devlink_fill_eth_port_from_id(struct nfp_pf *pf, unsigned int port_index,
+nfp_devlink_fill_eth_port_from_id(struct nfp_pf *pf,
+				  struct devlink_port *dl_port,
 				  struct nfp_eth_table_port *copy)
 {
-	struct nfp_port *port;
-
-	port = nfp_port_from_id(pf, NFP_PORT_PHYS_PORT, port_index);
+	struct nfp_port *port = container_of(dl_port, struct nfp_port, dl_port);
 
 	return nfp_devlink_fill_eth_port(port, copy);
 }
@@ -62,7 +61,7 @@ nfp_devlink_set_lanes(struct nfp_pf *pf, unsigned int idx, unsigned int lanes)
 }
 
 static int
-nfp_devlink_port_split(struct devlink *devlink, unsigned int port_index,
+nfp_devlink_port_split(struct devlink *devlink, struct devlink_port *port,
 		       unsigned int count, struct netlink_ext_ack *extack)
 {
 	struct nfp_pf *pf = devlink_priv(devlink);
@@ -71,7 +70,7 @@ nfp_devlink_port_split(struct devlink *devlink, unsigned int port_index,
 	int ret;
 
 	rtnl_lock();
-	ret = nfp_devlink_fill_eth_port_from_id(pf, port_index, &eth_port);
+	ret = nfp_devlink_fill_eth_port_from_id(pf, port, &eth_port);
 	rtnl_unlock();
 	if (ret)
 		return ret;
@@ -88,7 +87,7 @@ nfp_devlink_port_split(struct devlink *devlink, unsigned int port_index,
 }
 
 static int
-nfp_devlink_port_unsplit(struct devlink *devlink, unsigned int port_index,
+nfp_devlink_port_unsplit(struct devlink *devlink, struct devlink_port *port,
 			 struct netlink_ext_ack *extack)
 {
 	struct nfp_pf *pf = devlink_priv(devlink);
@@ -97,7 +96,7 @@ nfp_devlink_port_unsplit(struct devlink *devlink, unsigned int port_index,
 	int ret;
 
 	rtnl_lock();
-	ret = nfp_devlink_fill_eth_port_from_id(pf, port_index, &eth_port);
+	ret = nfp_devlink_fill_eth_port_from_id(pf, port, &eth_port);
 	rtnl_unlock();
 	if (ret)
 		return ret;
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_port.c b/drivers/net/ethernet/netronome/nfp/nfp_port.c
index 236cd3c1201f..4f2308570dcf 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_port.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_port.c
@@ -75,24 +75,6 @@ int nfp_port_set_features(struct net_device *netdev, netdev_features_t features)
 	return 0;
 }
 
-struct nfp_port *
-nfp_port_from_id(struct nfp_pf *pf, enum nfp_port_type type, unsigned int id)
-{
-	struct devlink *devlink = priv_to_devlink(pf);
-	struct nfp_port *port;
-
-	devl_assert_locked(devlink);
-
-	if (type != NFP_PORT_PHYS_PORT)
-		return NULL;
-
-	list_for_each_entry(port, &pf->ports, port_list)
-		if (port->eth_id == id)
-			return port;
-
-	return NULL;
-}
-
 struct nfp_eth_table_port *__nfp_port_get_eth_port(struct nfp_port *port)
 {
 	if (!port)
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_port.h b/drivers/net/ethernet/netronome/nfp/nfp_port.h
index df316b9e891d..d1ebe6c72f7f 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_port.h
+++ b/drivers/net/ethernet/netronome/nfp/nfp_port.h
@@ -106,8 +106,6 @@ nfp_port_set_features(struct net_device *netdev, netdev_features_t features);
 struct nfp_port *nfp_port_from_netdev(struct net_device *netdev);
 int nfp_port_get_port_parent_id(struct net_device *netdev,
 				struct netdev_phys_item_id *ppid);
-struct nfp_port *
-nfp_port_from_id(struct nfp_pf *pf, enum nfp_port_type type, unsigned int id);
 struct nfp_eth_table_port *__nfp_port_get_eth_port(struct nfp_port *port);
 struct nfp_eth_table_port *nfp_port_get_eth_port(struct nfp_port *port);