LXR linux/drivers/net/ethernet/mellanox/mlx5/core/en_accel/en

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