net/mlx5: SF, Store and use start function id

SF ids in the device are in two different contiguous ranges. One for
the local controller and second for the external host controller.

Prepare code to handle multiple start function id by storing it in the
table.
Signed-off-by: NParav Pandit <parav@nvidia.com>
Reviewed-by: NVu Pham <vuhuong@nvidia.com>
Signed-off-by: NSaeed Mahameed <saeedm@nvidia.com>

drivers/net/ethernet/mellanox/mlx5/core/sf/hw_table.c

@@ -19,18 +19,23 @@ struct mlx5_sf_hw_table {
 	struct mlx5_core_dev *dev;
 	struct mlx5_sf_hw *sfs;
 	int max_local_functions;
+	u16 start_fn_id;
 	struct mutex table_lock; /* Serializes sf deletion and vhca state change handler. */
 	struct notifier_block vhca_nb;
 };
 
 u16 mlx5_sf_sw_to_hw_id(const struct mlx5_core_dev *dev, u16 sw_id)
 {
-	return sw_id + mlx5_sf_start_function_id(dev);
+	struct mlx5_sf_hw_table *table = dev->priv.sf_hw_table;
+
+	return table->start_fn_id + sw_id;
 }
 
 static u16 mlx5_sf_hw_to_sw_id(const struct mlx5_core_dev *dev, u16 hw_id)
 {
-	return hw_id - mlx5_sf_start_function_id(dev);
+	struct mlx5_sf_hw_table *table = dev->priv.sf_hw_table;
+
+	return hw_id - table->start_fn_id;
 }
 
 int mlx5_sf_hw_table_sf_alloc(struct mlx5_core_dev *dev, u32 usr_sfnum)
@@ -164,6 +169,7 @@ int mlx5_sf_hw_table_init(struct mlx5_core_dev *dev)
 	table->dev = dev;
 	table->sfs = sfs;
 	table->max_local_functions = max_functions;
+	table->start_fn_id = mlx5_sf_start_function_id(dev);
 	dev->priv.sf_hw_table = table;
 	mlx5_core_dbg(dev, "SF HW table: max sfs = %d\n", max_functions);
 	return 0;