brintos

brintos / linux-shallow public Read only

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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 10void 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		else28			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