net/mlx5e: Retrieve the switchdev id from the firmware only once

Avoid firmware command execution each time the switchdev HW ID attr get
call is made. We do that by reading the ID (PF NIC MAC) only once at
load time and store it on the representor structure.

Signed-off-by: Hadar Hen Zion <hadarh@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 8 insertions, 3 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
index 65258b259579..03d944c0077e 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
@@ -3387,6 +3387,7 @@ static void mlx5e_nic_enable(struct mlx5e_priv *priv)
         queue_work(priv->wq, &priv->set_rx_mode_work);
 
         if (MLX5_CAP_GEN(mdev, vport_group_manager)) {
+                mlx5_query_nic_vport_mac_address(mdev, 0, rep.hw_id);
                 rep.load = mlx5e_nic_rep_load;
                 rep.unload = mlx5e_nic_rep_unload;
                 rep.vport = 0;
@@ -3505,16 +3506,20 @@ static void mlx5e_register_vport_rep(struct mlx5_core_dev *mdev)
         struct mlx5_eswitch *esw = mdev->priv.eswitch;
         int total_vfs = MLX5_TOTAL_VPORTS(mdev);
         int vport;
+        u8 mac[ETH_ALEN];
 
         if (!MLX5_CAP_GEN(mdev, vport_group_manager))
                 return;
 
+        mlx5_query_nic_vport_mac_address(mdev, 0, mac);
+
         for (vport = 1; vport < total_vfs; vport++) {
                 struct mlx5_eswitch_rep rep;
 
                 rep.load = mlx5e_vport_rep_load;
                 rep.unload = mlx5e_vport_rep_unload;
                 rep.vport = vport;
+                ether_addr_copy(rep.hw_id, mac);
                 mlx5_eswitch_register_vport_rep(esw, &rep);
         }
 }
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
index 1c7d8b8314bf..134de4a11f1d 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
@@ -135,17 +135,16 @@ static const struct ethtool_ops mlx5e_rep_ethtool_ops = {
 int mlx5e_attr_get(struct net_device *dev, struct switchdev_attr *attr)
 {
         struct mlx5e_priv *priv = netdev_priv(dev);
+        struct mlx5_eswitch_rep *rep = priv->ppriv;
         struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
-        u8 mac[ETH_ALEN];
 
         if (esw->mode == SRIOV_NONE)
                 return -EOPNOTSUPP;
 
         switch (attr->id) {
         case SWITCHDEV_ATTR_ID_PORT_PARENT_ID:
-                mlx5_query_nic_vport_mac_address(priv->mdev, 0, mac);
                 attr->u.ppid.id_len = ETH_ALEN;
-                memcpy(&attr->u.ppid.id, &mac, ETH_ALEN);
+                ether_addr_copy(attr->u.ppid.id, rep->hw_id);
                 break;
         default:
                 return -EOPNOTSUPP;
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
index c0b05603fc31..a96140971d77 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
@@ -174,6 +174,7 @@ struct mlx5_eswitch_rep {
         void                  *priv_data;
         struct list_head       vport_sqs_list;
         bool                   valid;
+        u8                     hw_id[ETH_ALEN];
 };
 
 struct mlx5_esw_offload {