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 #include "accel/ipsec.h"
44
45 #define MLX5E_IPSEC_SADB_RX_BITS 10
46 #define MLX5E_IPSEC_ESN_SCOPE_MID 0x80000000L
47
48 struct mlx5e_priv;
49
50 struct mlx5e_ipsec_sw_stats {
51 atomic64_t ipsec_rx_drop_sp_alloc;
52 atomic64_t ipsec_rx_drop_sadb_miss;
53 atomic64_t ipsec_rx_drop_syndrome;
54 atomic64_t ipsec_tx_drop_bundle;
55 atomic64_t ipsec_tx_drop_no_state;
56 atomic64_t ipsec_tx_drop_not_ip;
57 atomic64_t ipsec_tx_drop_trailer;
58 atomic64_t ipsec_tx_drop_metadata;
59 };
60
61 struct mlx5e_ipsec_stats {
62 u64 ipsec_dec_in_packets;
63 u64 ipsec_dec_out_packets;
64 u64 ipsec_dec_bypass_packets;
65 u64 ipsec_enc_in_packets;
66 u64 ipsec_enc_out_packets;
67 u64 ipsec_enc_bypass_packets;
68 u64 ipsec_dec_drop_packets;
69 u64 ipsec_dec_auth_fail_packets;
70 u64 ipsec_enc_drop_packets;
71 u64 ipsec_add_sa_success;
72 u64 ipsec_add_sa_fail;
73 u64 ipsec_del_sa_success;
74 u64 ipsec_del_sa_fail;
75 u64 ipsec_cmd_drop;
76 };
77
78 struct mlx5e_accel_fs_esp;
79 struct mlx5e_ipsec_tx;
80
81 struct mlx5e_ipsec {
82 struct mlx5e_priv *en_priv;
83 DECLARE_HASHTABLE(sadb_rx, MLX5E_IPSEC_SADB_RX_BITS);
84 bool no_trailer;
85 spinlock_t sadb_rx_lock; /* Protects sadb_rx and halloc */
86 struct ida halloc;
87 struct mlx5e_ipsec_sw_stats sw_stats;
88 struct mlx5e_ipsec_stats stats;
89 struct workqueue_struct *wq;
90 struct mlx5e_accel_fs_esp *rx_fs;
91 struct mlx5e_ipsec_tx *tx_fs;
92 };
93
94 struct mlx5e_ipsec_esn_state {
95 u32 esn;
96 u8 trigger: 1;
97 u8 overlap: 1;
98 };
99
100 struct mlx5e_ipsec_rule {
101 struct mlx5_flow_handle *rule;
102 struct mlx5_modify_hdr *set_modify_hdr;
103 };
104
105 struct mlx5e_ipsec_sa_entry {
106 struct hlist_node hlist; /* Item in SADB_RX hashtable */
107 struct mlx5e_ipsec_esn_state esn_state;
108 unsigned int handle; /* Handle in SADB_RX */
109 struct xfrm_state *x;
110 struct mlx5e_ipsec *ipsec;
111 struct mlx5_accel_esp_xfrm *xfrm;
112 void *hw_context;
113 void (*set_iv_op)(struct sk_buff *skb, struct xfrm_state *x,
114 struct xfrm_offload *xo);
115 u32 ipsec_obj_id;
116 struct mlx5e_ipsec_rule ipsec_rule;
117 };
118
119 void mlx5e_ipsec_build_inverse_table(void);
120 int mlx5e_ipsec_init(struct mlx5e_priv *priv);
121 void mlx5e_ipsec_cleanup(struct mlx5e_priv *priv);
122 void mlx5e_ipsec_build_netdev(struct mlx5e_priv *priv);
123
124 struct xfrm_state *mlx5e_ipsec_sadb_rx_lookup(struct mlx5e_ipsec *dev,
125 unsigned int handle);
126
127 #else
128
mlx5e_ipsec_build_inverse_table(void)129 static inline void mlx5e_ipsec_build_inverse_table(void)
130 {
131 }
132
mlx5e_ipsec_init(struct mlx5e_priv * priv)133 static inline int mlx5e_ipsec_init(struct mlx5e_priv *priv)
134 {
135 return 0;
136 }
137
mlx5e_ipsec_cleanup(struct mlx5e_priv * priv)138 static inline void mlx5e_ipsec_cleanup(struct mlx5e_priv *priv)
139 {
140 }
141
mlx5e_ipsec_build_netdev(struct mlx5e_priv * priv)142 static inline void mlx5e_ipsec_build_netdev(struct mlx5e_priv *priv)
143 {
144 }
145
146 #endif
147
148 #endif /* __MLX5E_IPSEC_H__ */
149