drivers/net/ethernet/netronome/nfp/nfd3/ipsec.c

   1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
   2 /* Copyright (C) 2018 Netronome Systems, Inc */
   3 /* Copyright (C) 2021 Corigine, Inc */
   4
   5 #include <net/xfrm.h>
   6
   7 #include "../nfp_net.h"
   8 #include "nfd3.h"
   9
  10 void nfp_nfd3_ipsec_tx(struct nfp_nfd3_tx_desc *txd, struct sk_buff *skb)
  11 {
  12         struct xfrm_state *x = xfrm_input_state(skb);
  13         struct xfrm_offload *xo = xfrm_offload(skb);
  14         struct iphdr *iph = ip_hdr(skb);
  15         int l4_proto;
  16
  17         if (x->xso.dev && (x->xso.dev->features & NETIF_F_HW_ESP_TX_CSUM)) {
  18                 txd->flags |= NFD3_DESC_TX_CSUM;
  19
  20                 if (iph->version == 4)
  21                         txd->flags |= NFD3_DESC_TX_IP4_CSUM;
  22
  23                 if (x->props.mode == XFRM_MODE_TRANSPORT)
  24                         l4_proto = xo->proto;
  25                 else if (x->props.mode == XFRM_MODE_TUNNEL)
  26                         l4_proto = xo->inner_ipproto;
  27                 else
  28                         return;
  29
  30                 switch (l4_proto) {
  31                 case IPPROTO_UDP:
  32                         txd->flags |= NFD3_DESC_TX_UDP_CSUM;
  33                         return;
  34                 case IPPROTO_TCP:
  35                         txd->flags |= NFD3_DESC_TX_TCP_CSUM;
  36                         return;
  37                 }
  38         }
  39 }