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
34 #ifndef __MLX5E_EN_ACCEL_H__
35 #define __MLX5E_EN_ACCEL_H__
36
37 #include <linux/skbuff.h>
38 #include <linux/netdevice.h>
39 #include "en_accel/ipsec_rxtx.h"
40 #include "en_accel/tls_rxtx.h"
41 #include "en.h"
42 #include "en/txrx.h"
43
44 #if IS_ENABLED(CONFIG_GENEVE)
mlx5_geneve_tx_allowed(struct mlx5_core_dev * mdev)45 static inline bool mlx5_geneve_tx_allowed(struct mlx5_core_dev *mdev)
46 {
47 return mlx5_tx_swp_supported(mdev);
48 }
49
50 static inline void
mlx5e_tx_tunnel_accel(struct sk_buff * skb,struct mlx5_wqe_eth_seg * eseg)51 mlx5e_tx_tunnel_accel(struct sk_buff *skb, struct mlx5_wqe_eth_seg *eseg)
52 {
53 struct mlx5e_swp_spec swp_spec = {};
54 unsigned int offset = 0;
55 __be16 l3_proto;
56 u8 l4_proto;
57
58 l3_proto = vlan_get_protocol(skb);
59 switch (l3_proto) {
60 case htons(ETH_P_IP):
61 l4_proto = ip_hdr(skb)->protocol;
62 break;
63 case htons(ETH_P_IPV6):
64 l4_proto = ipv6_find_hdr(skb, &offset, -1, NULL, NULL);
65 break;
66 default:
67 return;
68 }
69
70 if (l4_proto != IPPROTO_UDP ||
71 udp_hdr(skb)->dest != cpu_to_be16(GENEVE_UDP_PORT))
72 return;
73 swp_spec.l3_proto = l3_proto;
74 swp_spec.l4_proto = l4_proto;
75 swp_spec.is_tun = true;
76 if (inner_ip_hdr(skb)->version == 6) {
77 swp_spec.tun_l3_proto = htons(ETH_P_IPV6);
78 swp_spec.tun_l4_proto = inner_ipv6_hdr(skb)->nexthdr;
79 } else {
80 swp_spec.tun_l3_proto = htons(ETH_P_IP);
81 swp_spec.tun_l4_proto = inner_ip_hdr(skb)->protocol;
82 }
83
84 mlx5e_set_eseg_swp(skb, eseg, &swp_spec);
85 }
86
87 #else
mlx5_geneve_tx_allowed(struct mlx5_core_dev * mdev)88 static inline bool mlx5_geneve_tx_allowed(struct mlx5_core_dev *mdev)
89 {
90 return false;
91 }
92
93 #endif /* CONFIG_GENEVE */
94
95 static inline void
mlx5e_udp_gso_handle_tx_skb(struct sk_buff * skb)96 mlx5e_udp_gso_handle_tx_skb(struct sk_buff *skb)
97 {
98 int payload_len = skb_shinfo(skb)->gso_size + sizeof(struct udphdr);
99
100 udp_hdr(skb)->len = htons(payload_len);
101 }
102
103 static inline struct sk_buff *
mlx5e_accel_handle_tx(struct sk_buff * skb,struct mlx5e_txqsq * sq,struct net_device * dev,struct mlx5e_tx_wqe ** wqe,u16 * pi)104 mlx5e_accel_handle_tx(struct sk_buff *skb,
105 struct mlx5e_txqsq *sq,
106 struct net_device *dev,
107 struct mlx5e_tx_wqe **wqe,
108 u16 *pi)
109 {
110 #ifdef CONFIG_MLX5_EN_TLS
111 if (test_bit(MLX5E_SQ_STATE_TLS, &sq->state)) {
112 skb = mlx5e_tls_handle_tx_skb(dev, sq, skb, wqe, pi);
113 if (unlikely(!skb))
114 return NULL;
115 }
116 #endif
117
118 #ifdef CONFIG_MLX5_EN_IPSEC
119 if (test_bit(MLX5E_SQ_STATE_IPSEC, &sq->state)) {
120 skb = mlx5e_ipsec_handle_tx_skb(dev, *wqe, skb);
121 if (unlikely(!skb))
122 return NULL;
123 }
124 #endif
125
126 if (skb_is_gso(skb) && skb_shinfo(skb)->gso_type & SKB_GSO_UDP_L4)
127 mlx5e_udp_gso_handle_tx_skb(skb);
128
129 return skb;
130 }
131
132 #endif /* __MLX5E_EN_ACCEL_H__ */
133