netdev - [PATCH net-next 3/8] mlxsw: spectrum: Move port SWID set before core port init

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Date:   Tue, 14 Sep 2021 09:13:25 +0300
From:   Ido Schimmel <idosch@...sch.org>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, kuba@...nel.org, jiri@...dia.com,
        mlxsw@...dia.com, Ido Schimmel <idosch@...dia.com>
Subject: [PATCH net-next 3/8] mlxsw: spectrum: Move port SWID set before core port init

From: Jiri Pirko <jiri@...dia.com>

During port creation, mlxsw_core_port_init() is called with the front
panel port number and the split port sub-number. Currently, this
information is determined by the driver without firmware assistance.

Subsequent patches are going to query this information from firmware,
but this requires the port to assigned to SWID.

Therefore, move port SWID assignment before mlxsw_core_port_init().

Signed-off-by: Jiri Pirko <jiri@...dia.com>
Signed-off-by: Ido Schimmel <idosch@...dia.com>
---
 .../net/ethernet/mellanox/mlxsw/spectrum.c    | 28 ++++++++++---------
 1 file changed, 15 insertions(+), 13 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
index 912a7f8f6c1f..e12232f371c8 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
@@ -351,12 +351,12 @@ static int mlxsw_sp_port_mtu_set(struct mlxsw_sp_port *mlxsw_sp_port, u16 mtu)
 	return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(pmtu), pmtu_pl);
 }
 
-static int mlxsw_sp_port_swid_set(struct mlxsw_sp_port *mlxsw_sp_port, u8 swid)
+static int mlxsw_sp_port_swid_set(struct mlxsw_sp *mlxsw_sp,
+				  u8 local_port, u8 swid)
 {
-	struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
 	char pspa_pl[MLXSW_REG_PSPA_LEN];
 
-	mlxsw_reg_pspa_pack(pspa_pl, swid, mlxsw_sp_port->local_port);
+	mlxsw_reg_pspa_pack(pspa_pl, swid, local_port);
 	return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(pspa), pspa_pl);
 }
 
@@ -1460,6 +1460,13 @@ static int mlxsw_sp_port_create(struct mlxsw_sp *mlxsw_sp, u8 local_port,
 		return err;
 	}
 
+	err = mlxsw_sp_port_swid_set(mlxsw_sp, local_port, 0);
+	if (err) {
+		dev_err(mlxsw_sp->bus_info->dev, "Port %d: Failed to set SWID\n",
+			local_port);
+		goto err_port_swid_set;
+	}
+
 	splittable = lanes > 1 && !split;
 	err = mlxsw_core_port_init(mlxsw_sp->core, local_port,
 				   port_mapping->module + 1, split,
@@ -1504,13 +1511,6 @@ static int mlxsw_sp_port_create(struct mlxsw_sp *mlxsw_sp, u8 local_port,
 	dev->netdev_ops = &mlxsw_sp_port_netdev_ops;
 	dev->ethtool_ops = &mlxsw_sp_port_ethtool_ops;
 
-	err = mlxsw_sp_port_swid_set(mlxsw_sp_port, 0);
-	if (err) {
-		dev_err(mlxsw_sp->bus_info->dev, "Port %d: Failed to set SWID\n",
-			mlxsw_sp_port->local_port);
-		goto err_port_swid_set;
-	}
-
 	err = mlxsw_sp_port_dev_addr_init(mlxsw_sp_port);
 	if (err) {
 		dev_err(mlxsw_sp->bus_info->dev, "Port %d: Unable to init port mac address\n",
@@ -1711,14 +1711,15 @@ static int mlxsw_sp_port_create(struct mlxsw_sp *mlxsw_sp, u8 local_port,
 err_port_speed_by_width_set:
 err_port_system_port_mapping_set:
 err_dev_addr_init:
-	mlxsw_sp_port_swid_set(mlxsw_sp_port, MLXSW_PORT_SWID_DISABLED_PORT);
-err_port_swid_set:
 	free_percpu(mlxsw_sp_port->pcpu_stats);
 err_alloc_stats:
 	free_netdev(dev);
 err_alloc_etherdev:
 	mlxsw_core_port_fini(mlxsw_sp->core, local_port);
 err_core_port_init:
+	mlxsw_sp_port_swid_set(mlxsw_sp, local_port,
+			       MLXSW_PORT_SWID_DISABLED_PORT);
+err_port_swid_set:
 	mlxsw_sp_port_module_unmap(mlxsw_sp, local_port);
 	return err;
 }
@@ -1741,11 +1742,12 @@ static void mlxsw_sp_port_remove(struct mlxsw_sp *mlxsw_sp, u8 local_port)
 	mlxsw_sp_port_dcb_fini(mlxsw_sp_port);
 	mlxsw_sp_port_tc_mc_mode_set(mlxsw_sp_port, false);
 	mlxsw_sp_port_buffers_fini(mlxsw_sp_port);
-	mlxsw_sp_port_swid_set(mlxsw_sp_port, MLXSW_PORT_SWID_DISABLED_PORT);
 	free_percpu(mlxsw_sp_port->pcpu_stats);
 	WARN_ON_ONCE(!list_empty(&mlxsw_sp_port->vlans_list));
 	free_netdev(mlxsw_sp_port->dev);
 	mlxsw_core_port_fini(mlxsw_sp->core, local_port);
+	mlxsw_sp_port_swid_set(mlxsw_sp, local_port,
+			       MLXSW_PORT_SWID_DISABLED_PORT);
 	mlxsw_sp_port_module_unmap(mlxsw_sp, local_port);
 }
 
-- 
2.31.1