root/drivers/net/ethernet/mellanox/mlx5/core/en_accel/en_accel.h

INCLUDED FROM

DEFINITIONS

1. mlx5_geneve_tx_allowed
2. mlx5e_tx_tunnel_accel
3. mlx5_geneve_tx_allowed
4. mlx5e_udp_gso_handle_tx_skb
5. mlx5e_accel_handle_tx

   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)
  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
  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
  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
  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 *
 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__ */