1 /*
2  * Copyright (c) 2017 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 
34 #ifndef __MLX5E_IPSEC_H__
35 #define __MLX5E_IPSEC_H__
36 
37 #ifdef CONFIG_MLX5_EN_IPSEC
38 
39 #include <linux/mlx5/device.h>
40 #include <net/xfrm.h>
41 #include <linux/idr.h>
42 
43 #define MLX5E_IPSEC_SADB_RX_BITS 10
44 #define MLX5E_METADATA_ETHER_TYPE (0x8CE4)
45 #define MLX5E_METADATA_ETHER_LEN 8
46 
47 struct mlx5e_priv;
48 
49 struct mlx5e_ipsec_sw_stats {
50 	atomic64_t ipsec_rx_drop_sp_alloc;
51 	atomic64_t ipsec_rx_drop_sadb_miss;
52 	atomic64_t ipsec_rx_drop_syndrome;
53 	atomic64_t ipsec_tx_drop_bundle;
54 	atomic64_t ipsec_tx_drop_no_state;
55 	atomic64_t ipsec_tx_drop_not_ip;
56 	atomic64_t ipsec_tx_drop_trailer;
57 	atomic64_t ipsec_tx_drop_metadata;
58 };
59 
60 struct mlx5e_ipsec_stats {
61 	u64 ipsec_dec_in_packets;
62 	u64 ipsec_dec_out_packets;
63 	u64 ipsec_dec_bypass_packets;
64 	u64 ipsec_enc_in_packets;
65 	u64 ipsec_enc_out_packets;
66 	u64 ipsec_enc_bypass_packets;
67 	u64 ipsec_dec_drop_packets;
68 	u64 ipsec_dec_auth_fail_packets;
69 	u64 ipsec_enc_drop_packets;
70 	u64 ipsec_add_sa_success;
71 	u64 ipsec_add_sa_fail;
72 	u64 ipsec_del_sa_success;
73 	u64 ipsec_del_sa_fail;
74 	u64 ipsec_cmd_drop;
75 };
76 
77 struct mlx5e_ipsec {
78 	struct mlx5e_priv *en_priv;
79 	DECLARE_HASHTABLE(sadb_rx, MLX5E_IPSEC_SADB_RX_BITS);
80 	spinlock_t sadb_rx_lock; /* Protects sadb_rx and halloc */
81 	struct ida halloc;
82 	struct mlx5e_ipsec_sw_stats sw_stats;
83 	struct mlx5e_ipsec_stats stats;
84 };
85 
86 void mlx5e_ipsec_build_inverse_table(void);
87 int mlx5e_ipsec_init(struct mlx5e_priv *priv);
88 void mlx5e_ipsec_cleanup(struct mlx5e_priv *priv);
89 void mlx5e_ipsec_build_netdev(struct mlx5e_priv *priv);
90 
91 int mlx5e_ipsec_get_count(struct mlx5e_priv *priv);
92 int mlx5e_ipsec_get_strings(struct mlx5e_priv *priv, uint8_t *data);
93 void mlx5e_ipsec_update_stats(struct mlx5e_priv *priv);
94 int mlx5e_ipsec_get_stats(struct mlx5e_priv *priv, u64 *data);
95 
96 struct xfrm_state *mlx5e_ipsec_sadb_rx_lookup(struct mlx5e_ipsec *dev,
97 					      unsigned int handle);
98 
99 #else
100 
101 static inline void mlx5e_ipsec_build_inverse_table(void)
102 {
103 }
104 
105 static inline int mlx5e_ipsec_init(struct mlx5e_priv *priv)
106 {
107 	return 0;
108 }
109 
110 static inline void mlx5e_ipsec_cleanup(struct mlx5e_priv *priv)
111 {
112 }
113 
114 static inline void mlx5e_ipsec_build_netdev(struct mlx5e_priv *priv)
115 {
116 }
117 
118 static inline int mlx5e_ipsec_get_count(struct mlx5e_priv *priv)
119 {
120 	return 0;
121 }
122 
123 static inline int mlx5e_ipsec_get_strings(struct mlx5e_priv *priv,
124 					  uint8_t *data)
125 {
126 	return 0;
127 }
128 
129 static inline void mlx5e_ipsec_update_stats(struct mlx5e_priv *priv)
130 {
131 }
132 
133 static inline int mlx5e_ipsec_get_stats(struct mlx5e_priv *priv, u64 *data)
134 {
135 	return 0;
136 }
137 
138 #endif
139 
140 #endif	/* __MLX5E_IPSEC_H__ */
141