net/mlx5: Query to see if host PF is disabled

The host PF can be disabled, query firmware to check if the host PF of
this function exists.

Signed-off-by: Daniel Jurgens <danielj@nvidia.com>
Reviewed-by: William Tu <witu@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/1755112796-467444-2-git-send-email-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
index 4917d185d0c352ceba9b94095dc8f8b5954f0a8c..31059fff30ec19c63fbcc2e8ee3a0ec3643d55b7 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
@@ -1038,6 +1038,25 @@ const u32 *mlx5_esw_query_functions(struct mlx5_core_dev *dev)
        return ERR_PTR(err);
 }
 
+static int mlx5_esw_host_functions_enabled_query(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);
+
+       esw->esw_funcs.host_funcs_disabled =
+               MLX5_GET(query_esw_functions_out, query_host_out,
+                        host_params_context.host_pf_not_exist);
+
+       kvfree(query_host_out);
+       return 0;
+}
+
 static void mlx5_eswitch_event_handler_register(struct mlx5_eswitch *esw)
 {
        if (esw->mode == MLX5_ESWITCH_OFFLOADS && mlx5_eswitch_is_funcs_handler(esw->dev)) {
@@ -1874,6 +1893,10 @@ int mlx5_eswitch_init(struct mlx5_core_dev *dev)
                goto abort;
        }
 
+       err = mlx5_esw_host_functions_enabled_query(esw);
+       if (err)
+               goto abort;
+
        err = mlx5_esw_vports_init(esw);
        if (err)
                goto abort;

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
index b0b8ef3ec3c47499947531e707cae36ad45f32a0..6d86db20f468907bb73be3ab9e2976c4b2f74b1b 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
@@ -323,6 +323,7 @@ struct mlx5_host_work {
 
 struct mlx5_esw_functions {
        struct mlx5_nb          nb;
+       bool                    host_funcs_disabled;
        u16                     num_vfs;
        u16                     num_ec_vfs;
 };