{net,IB}/mlx5: Add flow steering helpers

Add helper functions that check if a protocol is
part of a flow steering match criteria.

Signed-off-by: Boris Pismenny <borisp@mellanox.com>
Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Aviad Yehezkel <aviadye@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

drivers/infiniband/hw/mlx5/main.c

@@ -59,6 +59,7 @@
 #include "mlx5_ib.h"
 #include "ib_rep.h"
 #include "cmd.h"
+#include <linux/mlx5/fs_helpers.h>
 
 #define DRIVER_NAME "mlx5_ib"
 #define DRIVER_VERSION "5.0-0"
@@ -2312,8 +2313,6 @@ static void set_tos(void *outer_c, void *outer_v, u8 mask, u8 val)
 		   offsetof(typeof(filter), field) -\
 		   sizeof(filter.field))
 
-#define IPV4_VERSION 4
-#define IPV6_VERSION 6
 static int parse_flow_attr(struct mlx5_core_dev *mdev, u32 *match_c,
 			   u32 *match_v, const union ib_flow_spec *ib_spec,
 			   struct mlx5_flow_act *action)
@@ -2399,7 +2398,7 @@ static int parse_flow_attr(struct mlx5_core_dev *mdev, u32 *match_c,
 			MLX5_SET(fte_match_set_lyr_2_4, headers_c,
 				 ip_version, 0xf);
 			MLX5_SET(fte_match_set_lyr_2_4, headers_v,
-				 ip_version, IPV4_VERSION);
+				 ip_version, MLX5_FS_IPV4_VERSION);
 		} else {
 			MLX5_SET(fte_match_set_lyr_2_4, headers_c,
 				 ethertype, 0xffff);
@@ -2438,7 +2437,7 @@ static int parse_flow_attr(struct mlx5_core_dev *mdev, u32 *match_c,
 			MLX5_SET(fte_match_set_lyr_2_4, headers_c,
 				 ip_version, 0xf);
 			MLX5_SET(fte_match_set_lyr_2_4, headers_v,
-				 ip_version, IPV6_VERSION);
+				 ip_version, MLX5_FS_IPV6_VERSION);
 		} else {
 			MLX5_SET(fte_match_set_lyr_2_4, headers_c,
 				 ethertype, 0xffff);

include/linux/mlx5/fs_helpers.h

@@ -0,0 +1,134 @@
+/*
+ * Copyright (c) 2018, Mellanox Technologies. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef _MLX5_FS_HELPERS_
+#define _MLX5_FS_HELPERS_
+
+#include <linux/mlx5/mlx5_ifc.h>
+
+#define MLX5_FS_IPV4_VERSION 4
+#define MLX5_FS_IPV6_VERSION 6
+
+static inline bool _mlx5_fs_is_outer_ipproto_flow(const u32 *match_c,
+						  const u32 *match_v, u8 match)
+{
+	const void *headers_c = MLX5_ADDR_OF(fte_match_param, match_c,
+					     outer_headers);
+	const void *headers_v = MLX5_ADDR_OF(fte_match_param, match_v,
+					     outer_headers);
+
+	return MLX5_GET(fte_match_set_lyr_2_4, headers_c, ip_protocol) == 0xff &&
+		MLX5_GET(fte_match_set_lyr_2_4, headers_v, ip_protocol) == match;
+}
+
+static inline bool mlx5_fs_is_outer_tcp_flow(const u32 *match_c,
+					     const u32 *match_v)
+{
+	return _mlx5_fs_is_outer_ipproto_flow(match_c, match_v, IPPROTO_TCP);
+}
+
+static inline bool mlx5_fs_is_outer_udp_flow(const u32 *match_c,
+					     const u32 *match_v)
+{
+	return _mlx5_fs_is_outer_ipproto_flow(match_c, match_v, IPPROTO_UDP);
+}
+
+static inline bool mlx5_fs_is_vxlan_flow(const u32 *match_c)
+{
+	void *misc_params_c = MLX5_ADDR_OF(fte_match_param, match_c,
+					   misc_parameters);
+
+	return MLX5_GET(fte_match_set_misc, misc_params_c, vxlan_vni);
+}
+
+static inline bool _mlx5_fs_is_outer_ipv_flow(struct mlx5_core_dev *mdev,
+					      const u32 *match_c,
+					      const u32 *match_v, int version)
+{
+	int match_ipv = MLX5_CAP_FLOWTABLE_NIC_RX(mdev,
+						  ft_field_support.outer_ip_version);
+	const void *headers_c = MLX5_ADDR_OF(fte_match_param, match_c,
+					     outer_headers);
+	const void *headers_v = MLX5_ADDR_OF(fte_match_param, match_v,
+					     outer_headers);
+
+	if (!match_ipv) {
+		u16 ethertype;
+
+		switch (version) {
+		case MLX5_FS_IPV4_VERSION:
+			ethertype = ETH_P_IP;
+			break;
+		case MLX5_FS_IPV6_VERSION:
+			ethertype = ETH_P_IPV6;
+			break;
+		default:
+			return false;
+		}
+
+		return MLX5_GET(fte_match_set_lyr_2_4, headers_c,
+				ethertype) == 0xffff &&
+			MLX5_GET(fte_match_set_lyr_2_4, headers_v,
+				 ethertype) == ethertype;
+	}
+
+	return MLX5_GET(fte_match_set_lyr_2_4, headers_c,
+			ip_version) == 0xf &&
+		MLX5_GET(fte_match_set_lyr_2_4, headers_v,
+			 ip_version) == version;
+}
+
+static inline bool
+mlx5_fs_is_outer_ipv4_flow(struct mlx5_core_dev *mdev, const u32 *match_c,
+			   const u32 *match_v)
+{
+	return _mlx5_fs_is_outer_ipv_flow(mdev, match_c, match_v,
+					  MLX5_FS_IPV4_VERSION);
+}
+
+static inline bool
+mlx5_fs_is_outer_ipv6_flow(struct mlx5_core_dev *mdev, const u32 *match_c,
+			   const u32 *match_v)
+{
+	return _mlx5_fs_is_outer_ipv_flow(mdev, match_c, match_v,
+					  MLX5_FS_IPV6_VERSION);
+}
+
+static inline bool mlx5_fs_is_outer_ipsec_flow(const u32 *match_c)
+{
+	void *misc_params_c =
+			MLX5_ADDR_OF(fte_match_param, match_c, misc_parameters);
+
+	return MLX5_GET(fte_match_set_misc, misc_params_c, outer_esp_spi);
+}
+
+#endif

include/linux/mlx5/mlx5_ifc.h

@@ -295,7 +295,9 @@ struct mlx5_ifc_flow_table_fields_supported_bits {
 	u8         inner_tcp_dport[0x1];
 	u8         inner_tcp_flags[0x1];
 	u8         reserved_at_37[0x9];
-	u8         reserved_at_40[0x1a];
+	u8         reserved_at_40[0x17];
+	u8	   outer_esp_spi[0x1];
+	u8	   reserved_at_58[0x2];
 	u8         bth_dst_qp[0x1];
 
 	u8         reserved_at_5b[0x25];
@@ -437,7 +439,9 @@ struct mlx5_ifc_fte_match_set_misc_bits {
 
 	u8         reserved_at_120[0x28];
 	u8         bth_dst_qp[0x18];
-	u8         reserved_at_160[0xa0];
+	u8	   reserved_at_160[0x20];
+	u8	   outer_esp_spi[0x20];
+	u8         reserved_at_1a0[0x60];
 };
 
 struct mlx5_ifc_cmd_pas_bits {