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 } 40