1/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
2/* Copyright (c) 2019 Mellanox Technologies. */
3
4#ifndef __MLX5E_KTLS_H__
5#define __MLX5E_KTLS_H__
6
7#include <linux/debugfs.h>
8#include <linux/tls.h>
9#include <net/tls.h>
10#include "en.h"
11
12#ifdef CONFIG_MLX5_EN_TLS
13#include "lib/crypto.h"
14#include "lib/mlx5.h"
15
16struct mlx5_crypto_dek *mlx5_ktls_create_key(struct mlx5_crypto_dek_pool *dek_pool,
17					     struct tls_crypto_info *crypto_info);
18void mlx5_ktls_destroy_key(struct mlx5_crypto_dek_pool *dek_pool,
19			   struct mlx5_crypto_dek *dek);
20
21static inline bool mlx5e_is_ktls_device(struct mlx5_core_dev *mdev)
22{
23	if (is_kdump_kernel())
24		return false;
25
26	if (!MLX5_CAP_GEN(mdev, tls_tx) && !MLX5_CAP_GEN(mdev, tls_rx))
27		return false;
28
29	if (!MLX5_CAP_GEN(mdev, log_max_dek))
30		return false;
31
32	return (MLX5_CAP_TLS(mdev, tls_1_2_aes_gcm_128) ||
33		MLX5_CAP_TLS(mdev, tls_1_2_aes_gcm_256));
34}
35
36static inline bool mlx5e_ktls_type_check(struct mlx5_core_dev *mdev,
37					 struct tls_crypto_info *crypto_info)
38{
39	switch (crypto_info->cipher_type) {
40	case TLS_CIPHER_AES_GCM_128:
41		if (crypto_info->version == TLS_1_2_VERSION)
42			return MLX5_CAP_TLS(mdev,  tls_1_2_aes_gcm_128);
43		break;
44	case TLS_CIPHER_AES_GCM_256:
45		if (crypto_info->version == TLS_1_2_VERSION)
46			return MLX5_CAP_TLS(mdev,  tls_1_2_aes_gcm_256);
47		break;
48	}
49
50	return false;
51}
52
53void mlx5e_ktls_build_netdev(struct mlx5e_priv *priv);
54int mlx5e_ktls_init_tx(struct mlx5e_priv *priv);
55void mlx5e_ktls_cleanup_tx(struct mlx5e_priv *priv);
56int mlx5e_ktls_init_rx(struct mlx5e_priv *priv);
57void mlx5e_ktls_cleanup_rx(struct mlx5e_priv *priv);
58int mlx5e_ktls_set_feature_rx(struct net_device *netdev, bool enable);
59struct mlx5e_ktls_resync_resp *
60mlx5e_ktls_rx_resync_create_resp_list(void);
61void mlx5e_ktls_rx_resync_destroy_resp_list(struct mlx5e_ktls_resync_resp *resp_list);
62
63static inline bool mlx5e_is_ktls_tx(struct mlx5_core_dev *mdev)
64{
65	return !is_kdump_kernel() && MLX5_CAP_GEN(mdev, tls_tx) &&
66		!mlx5_get_sd(mdev);
67}
68
69bool mlx5e_is_ktls_rx(struct mlx5_core_dev *mdev);
70
71struct mlx5e_tls_sw_stats {
72	atomic64_t tx_tls_ctx;
73	atomic64_t tx_tls_del;
74	atomic64_t tx_tls_pool_alloc;
75	atomic64_t tx_tls_pool_free;
76	atomic64_t rx_tls_ctx;
77	atomic64_t rx_tls_del;
78};
79
80struct mlx5e_tls_debugfs {
81	struct dentry *dfs;
82	struct dentry *dfs_tx;
83};
84
85struct mlx5e_tls {
86	struct mlx5_core_dev *mdev;
87	struct mlx5e_tls_sw_stats sw_stats;
88	struct workqueue_struct *rx_wq;
89	struct mlx5e_tls_tx_pool *tx_pool;
90	struct mlx5_crypto_dek_pool *dek_pool;
91	struct mlx5e_tls_debugfs debugfs;
92};
93
94int mlx5e_ktls_init(struct mlx5e_priv *priv);
95void mlx5e_ktls_cleanup(struct mlx5e_priv *priv);
96
97int mlx5e_ktls_get_count(struct mlx5e_priv *priv);
98int mlx5e_ktls_get_strings(struct mlx5e_priv *priv, uint8_t *data);
99int mlx5e_ktls_get_stats(struct mlx5e_priv *priv, u64 *data);
100
101#else
102static inline void mlx5e_ktls_build_netdev(struct mlx5e_priv *priv)
103{
104}
105
106static inline int mlx5e_ktls_init_tx(struct mlx5e_priv *priv)
107{
108	return 0;
109}
110
111static inline void mlx5e_ktls_cleanup_tx(struct mlx5e_priv *priv)
112{
113}
114
115static inline int mlx5e_ktls_init_rx(struct mlx5e_priv *priv)
116{
117	return 0;
118}
119
120static inline void mlx5e_ktls_cleanup_rx(struct mlx5e_priv *priv)
121{
122}
123
124static inline int mlx5e_ktls_set_feature_rx(struct net_device *netdev, bool enable)
125{
126	netdev_warn(netdev, "kTLS is not supported\n");
127	return -EOPNOTSUPP;
128}
129
130static inline struct mlx5e_ktls_resync_resp *
131mlx5e_ktls_rx_resync_create_resp_list(void)
132{
133	return ERR_PTR(-EOPNOTSUPP);
134}
135
136static inline void
137mlx5e_ktls_rx_resync_destroy_resp_list(struct mlx5e_ktls_resync_resp *resp_list) {}
138
139static inline bool mlx5e_is_ktls_rx(struct mlx5_core_dev *mdev)
140{
141	return false;
142}
143
144static inline int mlx5e_ktls_init(struct mlx5e_priv *priv) { return 0; }
145static inline void mlx5e_ktls_cleanup(struct mlx5e_priv *priv) { }
146static inline int mlx5e_ktls_get_count(struct mlx5e_priv *priv) { return 0; }
147static inline int mlx5e_ktls_get_strings(struct mlx5e_priv *priv, uint8_t *data)
148{
149	return 0;
150}
151
152static inline int mlx5e_ktls_get_stats(struct mlx5e_priv *priv, u64 *data)
153{
154	return 0;
155}
156#endif
157
158#endif /* __MLX5E_TLS_H__ */
159