net/mlx5: E-Switch, Move legacy code to a individual file

Currently eswitch offers two modes. Legacy and offloads.
Offloads code is already in its own file eswitch_offloads.c

However eswitch.c contains the eswitch legacy code and common
infrastructure  code.

To enable future extensions and to better manage generic common eswitch
infrastructure code, move the legacy code to its own legacy.c file.
Signed-off-by: Parav Pandit <parav@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

drivers/net/ethernet/mellanox/mlx5/core/Makefile

@@ -50,7 +50,7 @@ mlx5_core-$(CONFIG_MLX5_TC_CT)	     += en/tc_ct.o
 # Core extra
 #
 mlx5_core-$(CONFIG_MLX5_ESWITCH)   += eswitch.o eswitch_offloads.o eswitch_offloads_termtbl.o \
-				      ecpf.o rdma.o
+				      ecpf.o rdma.o esw/legacy.o
 mlx5_core-$(CONFIG_MLX5_ESWITCH)   += esw/acl/helper.o \
 				      esw/acl/egress_lgcy.o esw/acl/egress_ofld.o \
 				      esw/acl/ingress_lgcy.o esw/acl/ingress_ofld.o \

drivers/net/ethernet/mellanox/mlx5/core/esw/legacy.h

+/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
+/* Copyright (c) 2021 Mellanox Technologies Ltd */
+
+#ifndef __MLX5_ESW_LEGACY_H__
+#define __MLX5_ESW_LEGACY_H__
+
+#define MLX5_LEGACY_SRIOV_VPORT_EVENTS (MLX5_VPORT_UC_ADDR_CHANGE | \
+					MLX5_VPORT_MC_ADDR_CHANGE | \
+					MLX5_VPORT_PROMISC_CHANGE)
+
+struct mlx5_eswitch;
+
+int esw_legacy_enable(struct mlx5_eswitch *esw);
+void esw_legacy_disable(struct mlx5_eswitch *esw);
+
+int esw_legacy_vport_acl_setup(struct mlx5_eswitch *esw, struct mlx5_vport *vport);
+void esw_legacy_vport_acl_cleanup(struct mlx5_eswitch *esw, struct mlx5_vport *vport);
+
+int mlx5_esw_query_vport_drop_stats(struct mlx5_core_dev *dev,
+				    struct mlx5_vport *vport,
+				    struct mlx5_vport_drop_stats *stats);
+#endif

drivers/net/ethernet/mellanox/mlx5/core/eswitch.h

@@ -814,6 +814,8 @@ void mlx5_esw_put(struct mlx5_core_dev *dev);
 int mlx5_esw_try_lock(struct mlx5_eswitch *esw);
 void mlx5_esw_unlock(struct mlx5_eswitch *esw);
 
+void esw_vport_change_handle_locked(struct mlx5_vport *vport);
+
 #else  /* CONFIG_MLX5_ESWITCH */
 /* eswitch API stubs */
 static inline int  mlx5_eswitch_init(struct mlx5_core_dev *dev) { return 0; }