net/mlx5: E-switch, Read controller number from device

ECPF supports one external host controller. Read controller number
from the device.

Signed-off-by: Parav Pandit <parav@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
index 867d812..7455fbd 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
@@ -217,6 +217,7 @@ struct mlx5_esw_offload {
        atomic64_t num_flows;
        enum devlink_eswitch_encap_mode encap;
        struct ida vport_metadata_ida;
+       unsigned int host_number; /* ECPF supports one external host */
 };
 
 /* E-Switch MC FDB table hash node */

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
index d251692..b381cbc 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
@@ -2110,6 +2110,24 @@ int mlx5_esw_funcs_changed_handler(struct notifier_block *nb, unsigned long type
        return NOTIFY_OK;
 }
 
+static int mlx5_esw_host_number_init(struct mlx5_eswitch *esw)
+{
+       const u32 *query_host_out;
+
+       if (!mlx5_core_is_ecpf_esw_manager(esw->dev))
+               return 0;
+
+       query_host_out = mlx5_esw_query_functions(esw->dev);
+       if (IS_ERR(query_host_out))
+               return PTR_ERR(query_host_out);
+
+       /* Mark non local controller with non zero controller number. */
+       esw->offloads.host_number = MLX5_GET(query_esw_functions_out, query_host_out,
+                                            host_params_context.host_number);
+       kvfree(query_host_out);
+       return 0;
+}
+
 int esw_offloads_enable(struct mlx5_eswitch *esw)
 {
        struct mlx5_vport *vport;
@@ -2124,6 +2142,10 @@ int esw_offloads_enable(struct mlx5_eswitch *esw)
        mutex_init(&esw->offloads.termtbl_mutex);
        mlx5_rdma_enable_roce(esw->dev);
 
+       err = mlx5_esw_host_number_init(esw);
+       if (err)
+               goto err_vport_metadata;
+
        err = esw_set_passing_vport_metadata(esw, true);
        if (err)
                goto err_vport_metadata;