1 /*
2  * Copyright (c) 2018, Mellanox Technologies. All rights reserved.
3  *
4  * This software is available to you under a choice of one of two
5  * licenses.  You may choose to be licensed under the terms of the GNU
6  * General Public License (GPL) Version 2, available from the file
7  * COPYING in the main directory of this source tree, or the
8  * OpenIB.org BSD license below:
9  *
10  *     Redistribution and use in source and binary forms, with or
11  *     without modification, are permitted provided that the following
12  *     conditions are met:
13  *
14  *      - Redistributions of source code must retain the above
15  *        copyright notice, this list of conditions and the following
16  *        disclaimer.
17  *
18  *      - Redistributions in binary form must reproduce the above
19  *        copyright notice, this list of conditions and the following
20  *        disclaimer in the documentation and/or other materials
21  *        provided with the distribution.
22  *
23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30  * SOFTWARE.
31  */
32 
33 #ifndef _MLX5_FS_HELPERS_
34 #define _MLX5_FS_HELPERS_
35 
36 #include <linux/mlx5/mlx5_ifc.h>
37 
38 #define MLX5_FS_IPV4_VERSION 4
39 #define MLX5_FS_IPV6_VERSION 6
40 
_mlx5_fs_is_outer_ipv_flow(struct mlx5_core_dev * mdev,const u32 * match_c,const u32 * match_v,int version)41 static inline bool _mlx5_fs_is_outer_ipv_flow(struct mlx5_core_dev *mdev,
42 					      const u32 *match_c,
43 					      const u32 *match_v, int version)
44 {
45 	int match_ipv = MLX5_CAP_FLOWTABLE_NIC_RX(mdev,
46 						  ft_field_support.outer_ip_version);
47 	const void *headers_c = MLX5_ADDR_OF(fte_match_param, match_c,
48 					     outer_headers);
49 	const void *headers_v = MLX5_ADDR_OF(fte_match_param, match_v,
50 					     outer_headers);
51 
52 	if (!match_ipv) {
53 		u16 ethertype;
54 
55 		switch (version) {
56 		case MLX5_FS_IPV4_VERSION:
57 			ethertype = ETH_P_IP;
58 			break;
59 		case MLX5_FS_IPV6_VERSION:
60 			ethertype = ETH_P_IPV6;
61 			break;
62 		default:
63 			return false;
64 		}
65 
66 		return MLX5_GET(fte_match_set_lyr_2_4, headers_c,
67 				ethertype) == 0xffff &&
68 			MLX5_GET(fte_match_set_lyr_2_4, headers_v,
69 				 ethertype) == ethertype;
70 	}
71 
72 	return MLX5_GET(fte_match_set_lyr_2_4, headers_c,
73 			ip_version) == 0xf &&
74 		MLX5_GET(fte_match_set_lyr_2_4, headers_v,
75 			 ip_version) == version;
76 }
77 
78 static inline bool
mlx5_fs_is_outer_ipv4_flow(struct mlx5_core_dev * mdev,const u32 * match_c,const u32 * match_v)79 mlx5_fs_is_outer_ipv4_flow(struct mlx5_core_dev *mdev, const u32 *match_c,
80 			   const u32 *match_v)
81 {
82 	return _mlx5_fs_is_outer_ipv_flow(mdev, match_c, match_v,
83 					  MLX5_FS_IPV4_VERSION);
84 }
85 
86 static inline bool
mlx5_fs_is_outer_ipv6_flow(struct mlx5_core_dev * mdev,const u32 * match_c,const u32 * match_v)87 mlx5_fs_is_outer_ipv6_flow(struct mlx5_core_dev *mdev, const u32 *match_c,
88 			   const u32 *match_v)
89 {
90 	return _mlx5_fs_is_outer_ipv_flow(mdev, match_c, match_v,
91 					  MLX5_FS_IPV6_VERSION);
92 }
93 
94 #endif
95