[PATCH net-next 1/2] net/mlx5: Query to see if host PF is disabled

[Tariq Toukan <tariqt@nvidia.com>]

From: Daniel Jurgens <danielj@nvidia.com>

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>
---
 .../net/ethernet/mellanox/mlx5/core/eswitch.c | 23 +++++++++++++++++++
 .../net/ethernet/mellanox/mlx5/core/eswitch.h |  1 +
 2 files changed, 24 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
index 4917d185d0c3..31059fff30ec 100644
--- 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 b0b8ef3ec3c4..6d86db20f468 100644
--- 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;
 };
-- 
2.31.1