1 files changed, 39 insertions, 0 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/nfd3/ipsec.c b/drivers/net/ethernet/netronome/nfp/nfd3/ipsec.c
new file mode 100644
index 000000000000..51087693072c
--- /dev/null
+++ b/drivers/net/ethernet/netronome/nfp/nfd3/ipsec.c
@@ -0,0 +1,39 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+/* Copyright (C) 2018 Netronome Systems, Inc */
+/* Copyright (C) 2021 Corigine, Inc */
+
+#include <net/xfrm.h>
+
+#include "../nfp_net.h"
+#include "nfd3.h"
+
+void nfp_nfd3_ipsec_tx(struct nfp_nfd3_tx_desc *txd, struct sk_buff *skb)
+{
+	struct xfrm_state *x = xfrm_input_state(skb);
+	struct xfrm_offload *xo = xfrm_offload(skb);
+	struct iphdr *iph = ip_hdr(skb);
+	int l4_proto;
+
+	if (x->xso.dev && (x->xso.dev->features & NETIF_F_HW_ESP_TX_CSUM)) {
+		txd->flags |= NFD3_DESC_TX_CSUM;
+
+		if (iph->version == 4)
+			txd->flags |= NFD3_DESC_TX_IP4_CSUM;
+
+		if (x->props.mode == XFRM_MODE_TRANSPORT)
+			l4_proto = xo->proto;
+		else if (x->props.mode == XFRM_MODE_TUNNEL)
+			l4_proto = xo->inner_ipproto;
+		else
+			return;
+
+		switch (l4_proto) {
+		case IPPROTO_UDP:
+			txd->flags |= NFD3_DESC_TX_UDP_CSUM;
+			return;
+		case IPPROTO_TCP:
+			txd->flags |= NFD3_DESC_TX_TCP_CSUM;
+			return;
+		}
+	}
+}