devlink: introduce devlink_port_attrs_set

Change existing setter for split port information into more generic
attrs setter. Alongside with that, allow to set port number and subport
number for split ports.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlxsw/core.c

@@ -1714,15 +1714,16 @@ EXPORT_SYMBOL(mlxsw_core_port_fini);
 
 void mlxsw_core_port_eth_set(struct mlxsw_core *mlxsw_core, u8 local_port,
 			     void *port_driver_priv, struct net_device *dev,
-			     bool split, u32 split_group)
+			     u32 port_number, bool split,
+			     u32 split_port_subnumber)
 {
 	struct mlxsw_core_port *mlxsw_core_port =
 					&mlxsw_core->ports[local_port];
 	struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port;
 
 	mlxsw_core_port->port_driver_priv = port_driver_priv;
-	if (split)
-		devlink_port_split_set(devlink_port, split_group);
+	devlink_port_attrs_set(devlink_port, port_number,
+			       split, split_port_subnumber);
 	devlink_port_type_eth_set(devlink_port, dev);
 }
 EXPORT_SYMBOL(mlxsw_core_port_eth_set);

drivers/net/ethernet/mellanox/mlxsw/core.h

@@ -201,7 +201,8 @@ int mlxsw_core_port_init(struct mlxsw_core *mlxsw_core, u8 local_port);
 void mlxsw_core_port_fini(struct mlxsw_core *mlxsw_core, u8 local_port);
 void mlxsw_core_port_eth_set(struct mlxsw_core *mlxsw_core, u8 local_port,
 			     void *port_driver_priv, struct net_device *dev,
-			     bool split, u32 split_group);
+			     u32 port_number, bool split,
+			     u32 split_port_subnumber);
 void mlxsw_core_port_ib_set(struct mlxsw_core *mlxsw_core, u8 local_port,
 			    void *port_driver_priv);
 void mlxsw_core_port_clear(struct mlxsw_core *mlxsw_core, u8 local_port,

drivers/net/ethernet/mellanox/mlxsw/spectrum.c

@@ -2927,8 +2927,8 @@ static int mlxsw_sp_port_create(struct mlxsw_sp *mlxsw_sp, u8 local_port,
 	}
 
 	mlxsw_core_port_eth_set(mlxsw_sp->core, mlxsw_sp_port->local_port,
-				mlxsw_sp_port, dev, mlxsw_sp_port->split,
-				module);
+				mlxsw_sp_port, dev, module + 1,
+				mlxsw_sp_port->split, lane / width);
 	mlxsw_core_schedule_dw(&mlxsw_sp_port->periodic_hw_stats.update_dw, 0);
 	return 0;
 

drivers/net/ethernet/mellanox/mlxsw/switchx2.c

@@ -1149,7 +1149,7 @@ static int __mlxsw_sx_port_eth_create(struct mlxsw_sx *mlxsw_sx, u8 local_port,
 	}
 
 	mlxsw_core_port_eth_set(mlxsw_sx->core, mlxsw_sx_port->local_port,
-				mlxsw_sx_port, dev, false, 0);
+				mlxsw_sx_port, dev, module + 1, false, 0);
 	mlxsw_sx->ports[local_port] = mlxsw_sx_port;
 	return 0;
 

drivers/net/ethernet/netronome/nfp/nfp_devlink.c

@@ -175,8 +175,8 @@ int nfp_devlink_port_register(struct nfp_app *app, struct nfp_port *port)
 		return ret;
 
 	devlink_port_type_eth_set(&port->dl_port, port->netdev);
-	if (eth_port.is_split)
-		devlink_port_split_set(&port->dl_port, eth_port.label_port);
+	devlink_port_attrs_set(&port->dl_port, eth_port.label_port,
+			       eth_port.is_split, eth_port.label_subport);
 
 	devlink = priv_to_devlink(app->pf);
 

include/net/devlink.h

@@ -35,6 +35,13 @@ struct devlink {
 	char priv[0] __aligned(NETDEV_ALIGN);
 };
 
+struct devlink_port_attrs {
+	bool set;
+	u32 port_number; /* same value as "split group" */
+	bool split;
+	u32 split_subport_number;
+};
+
 struct devlink_port {
 	struct list_head list;
 	struct devlink *devlink;
@@ -43,8 +50,7 @@ struct devlink_port {
 	enum devlink_port_type type;
 	enum devlink_port_type desired_type;
 	void *type_dev;
-	bool split;
-	u32 split_group;
+	struct devlink_port_attrs attrs;
 };
 
 struct devlink_sb_pool_info {
@@ -367,8 +373,9 @@ void devlink_port_type_eth_set(struct devlink_port *devlink_port,
 void devlink_port_type_ib_set(struct devlink_port *devlink_port,
 			      struct ib_device *ibdev);
 void devlink_port_type_clear(struct devlink_port *devlink_port);
-void devlink_port_split_set(struct devlink_port *devlink_port,
-			    u32 split_group);
+void devlink_port_attrs_set(struct devlink_port *devlink_port,
+			    u32 port_number, bool split,
+			    u32 split_subport_number);
 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,
@@ -466,8 +473,9 @@ static inline void devlink_port_type_clear(struct devlink_port *devlink_port)
 {
 }
 
-static inline void devlink_port_split_set(struct devlink_port *devlink_port,
-					  u32 split_group)
+static inline void devlink_port_attrs_set(struct devlink_port *devlink_port,
+					  u32 port_number, bool split,
+					  u32 split_subport_number)
 {
 }
 

include/uapi/linux/devlink.h

@@ -224,6 +224,9 @@ enum devlink_attr {
 	DEVLINK_ATTR_DPIPE_TABLE_RESOURCE_ID,	/* u64 */
 	DEVLINK_ATTR_DPIPE_TABLE_RESOURCE_UNITS,/* u64 */
 
+	DEVLINK_ATTR_PORT_NUMBER,		/* u32 */
+	DEVLINK_ATTR_PORT_SPLIT_SUBPORT_NUMBER,	/* u32 */
+
 	/* add new attributes above here, update the policy in devlink.c */
 
 	__DEVLINK_ATTR_MAX,

net/core/devlink.c

@@ -453,6 +453,25 @@ static void devlink_notify(struct devlink *devlink, enum devlink_command cmd)
 				msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
 }
 
+static int devlink_nl_port_attrs_put(struct sk_buff *msg,
+				     struct devlink_port *devlink_port)
+{
+	struct devlink_port_attrs *attrs = &devlink_port->attrs;
+
+	if (!attrs->set)
+		return 0;
+	if (nla_put_u32(msg, DEVLINK_ATTR_PORT_NUMBER, attrs->port_number))
+		return -EMSGSIZE;
+	if (!attrs->split)
+		return 0;
+	if (nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_GROUP, attrs->port_number))
+		return -EMSGSIZE;
+	if (nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_SUBPORT_NUMBER,
+			attrs->split_subport_number))
+		return -EMSGSIZE;
+	return 0;
+}
+
 static int devlink_nl_port_fill(struct sk_buff *msg, struct devlink *devlink,
 				struct devlink_port *devlink_port,
 				enum devlink_command cmd, u32 portid,
@@ -492,9 +511,7 @@ static int devlink_nl_port_fill(struct sk_buff *msg, struct devlink *devlink,
 				   ibdev->name))
 			goto nla_put_failure;
 	}
-	if (devlink_port->split &&
-	    nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_GROUP,
-			devlink_port->split_group))
+	if (devlink_nl_port_attrs_put(msg, devlink_port))
 		goto nla_put_failure;
 
 	genlmsg_end(msg, hdr);
@@ -2971,19 +2988,28 @@ void devlink_port_type_clear(struct devlink_port *devlink_port)
 EXPORT_SYMBOL_GPL(devlink_port_type_clear);
 
 /**
- *	devlink_port_split_set - Set port is split
+ *	devlink_port_attrs_set - Set port attributes
  *
  *	@devlink_port: devlink port
- *	@split_group: split group - identifies group split port is part of
+ *	@port_number: number of the port that is facing user, for example
+ *	              the front panel port number
+ *	@split: indicates if this is split port
+ *	@split_subport_number: if the port is split, this is the number
+ *	                       of subport.
  */
-void devlink_port_split_set(struct devlink_port *devlink_port,
-			    u32 split_group)
+void devlink_port_attrs_set(struct devlink_port *devlink_port,
+			    u32 port_number, bool split,
+			    u32 split_subport_number)
 {
-	devlink_port->split = true;
-	devlink_port->split_group = split_group;
+	struct devlink_port_attrs *attrs = &devlink_port->attrs;
+
+	attrs->set = true;
+	attrs->port_number = port_number;
+	attrs->split = split;
+	attrs->split_subport_number = split_subport_number;
 	devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
 }
-EXPORT_SYMBOL_GPL(devlink_port_split_set);
+EXPORT_SYMBOL_GPL(devlink_port_attrs_set);
 
 int devlink_sb_register(struct devlink *devlink, unsigned int sb_index,
 			u32 size, u16 ingress_pools_count,