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		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