netdev - [PATCH net-next 4/5] mlxsw: spectrum: Keep maximum speed around

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Date:   Sun, 13 Sep 2020 18:46:08 +0300
From:   Ido Schimmel <idosch@...sch.org>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, kuba@...nel.org, jiri@...dia.com,
        petrm@...dia.com, mlxsw@...dia.com,
        Ido Schimmel <idosch@...dia.com>
Subject: [PATCH net-next 4/5] mlxsw: spectrum: Keep maximum speed around

From: Petr Machata <petrm@...dia.com>

The maximum port speed depends on link modes supported by the port, and for
Ethernet ports is constant. The maximum speed will be handy when setting
SBIB, the internal buffer used for traffic mirroring. Therefore, keep it in
struct mlxsw_sp_port for easy access.

Signed-off-by: Petr Machata <petrm@...dia.com>
Signed-off-by: Ido Schimmel <idosch@...dia.com>
---
 drivers/net/ethernet/mellanox/mlxsw/spectrum.c | 9 +++++++++
 drivers/net/ethernet/mellanox/mlxsw/spectrum.h | 1 +
 2 files changed, 10 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
index a68e62256bee..439f3302c4ff 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
@@ -1849,6 +1849,14 @@ static int mlxsw_sp_port_create(struct mlxsw_sp *mlxsw_sp, u8 local_port,
 		goto err_port_speed_by_width_set;
 	}
 
+	err = mlxsw_sp->port_type_speed_ops->ptys_max_speed(mlxsw_sp_port,
+							    &mlxsw_sp_port->max_speed);
+	if (err) {
+		dev_err(mlxsw_sp->bus_info->dev, "Port %d: Failed to get maximum speed\n",
+			mlxsw_sp_port->local_port);
+		goto err_max_speed_get;
+	}
+
 	err = mlxsw_sp_port_max_mtu_get(mlxsw_sp_port, &mlxsw_sp_port->max_mtu);
 	if (err) {
 		dev_err(mlxsw_sp->bus_info->dev, "Port %d: Failed to get maximum MTU\n",
@@ -1981,6 +1989,7 @@ static int mlxsw_sp_port_create(struct mlxsw_sp *mlxsw_sp, u8 local_port,
 err_port_admin_status_set:
 err_port_mtu_set:
 err_port_max_mtu_get:
+err_max_speed_get:
 err_port_speed_by_width_set:
 err_port_system_port_mapping_set:
 err_dev_addr_init:
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
index 69e59cf7812f..824ca4507c7e 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
@@ -320,6 +320,7 @@ struct mlxsw_sp_port {
 		struct delayed_work speed_update_dw;
 	} span;
 	int max_mtu;
+	u32 max_speed;
 };
 
 struct mlxsw_sp_port_type_speed_ops {
-- 
2.26.2