net/mlx5: HWS, added API and enabled HWS support

Enabling HWS support in the mlx5 driver:
 - added HWS API header
 - added HWS files in the mlx5 driver makefile
 - added kconfig flag that enables HWS compilation

Reviewed-by: Erez Shitrit <erezsh@nvidia.com>
Signed-off-by: Yevgeny Kliteynik <kliteyn@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

Documentation/networking/device_drivers/ethernet/mellanox/mlx5/kconfig.rst

@@ -130,6 +130,9 @@ Enabling the driver and kconfig options
 
 |    Build support for software-managed steering in the NIC.
 
+**CONFIG_MLX5_HW_STEERING=(y/n)**
+
+|    Build support for hardware-managed steering in the NIC.
 
 **CONFIG_MLX5_TC_CT=(y/n)**
 

drivers/net/ethernet/mellanox/mlx5/core/Kconfig

@@ -172,6 +172,16 @@ config MLX5_SW_STEERING
 	help
 	Build support for software-managed steering in the NIC.
 
+config MLX5_HW_STEERING
+	bool "Mellanox Technologies hardware-managed steering"
+	depends on MLX5_CORE_EN && MLX5_ESWITCH
+	default y
+	help
+	Build support for Hardware-Managed Flow Steering (HMFS) in the NIC.
+	HMFS is a new approach to managing steering rules where STEs are
+	written to ICM by HW (as opposed to SW in software-managed steering),
+	which allows higher rate of rule insertion.
+
 config MLX5_SF
 	bool "Mellanox Technologies subfunction device support using auxiliary device"
 	depends on MLX5_CORE && MLX5_CORE_EN

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

@@ -119,6 +119,27 @@ mlx5_core-$(CONFIG_MLX5_SW_STEERING) += steering/dr_domain.o steering/dr_table.o
 					steering/dr_action.o steering/fs_dr.o \
 					steering/dr_definer.o steering/dr_ptrn.o \
 					steering/dr_arg.o steering/dr_dbg.o lib/smfs.o
+
+#
+# HW Steering
+#
+mlx5_core-$(CONFIG_MLX5_HW_STEERING) += steering/hws/mlx5hws_cmd.o \
+					steering/hws/mlx5hws_context.o \
+					steering/hws/mlx5hws_pat_arg.o \
+					steering/hws/mlx5hws_buddy.o \
+					steering/hws/mlx5hws_pool.o \
+					steering/hws/mlx5hws_table.o \
+					steering/hws/mlx5hws_action.o \
+					steering/hws/mlx5hws_rule.o \
+					steering/hws/mlx5hws_matcher.o \
+					steering/hws/mlx5hws_send.o \
+					steering/hws/mlx5hws_definer.o \
+					steering/hws/mlx5hws_bwc.o \
+					steering/hws/mlx5hws_debug.o \
+					steering/hws/mlx5hws_vport.o \
+					steering/hws/mlx5hws_bwc_complex.o
+
+
 #
 # SF device
 #

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

@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
+subdir-ccflags-y += -I$(src)/..