[dpdk-dev] [PATCH v4 12/15] examples/ipsec-secgw: add app mode worker

[Lukasz Bartosik <lbartosik@marvell.com>]

Add application inbound/outbound worker thread and
IPsec application processing code for event mode.

Example ipsec-secgw command in app mode:
ipsec-secgw -w 0002:02:00.0,ipsec_in_max_spi=128
-w 0002:03:00.0,ipsec_in_max_spi=128 -w 0002:0e:00.0 -w 0002:10:00.1
--log-level=8 -c 0x1 -- -P -p 0x3 -u 0x1 --config "(1,0,0),(0,0,0)"
-f aes-gcm.cfg --transfer-mode event --event-schedule-type parallel

Signed-off-by: Anoob Joseph <anoobj@marvell.com>
Signed-off-by: Ankur Dwivedi <adwivedi@marvell.com>
Signed-off-by: Lukasz Bartosik <lbartosik@marvell.com>
---
 examples/ipsec-secgw/ipsec-secgw.c  |  31 +--
 examples/ipsec-secgw/ipsec-secgw.h  |  63 ++++++
 examples/ipsec-secgw/ipsec.h        |  16 --
 examples/ipsec-secgw/ipsec_worker.c | 424 +++++++++++++++++++++++++++++++++++-
 examples/ipsec-secgw/ipsec_worker.h |  35 +++
 5 files changed, 521 insertions(+), 48 deletions(-)
 create mode 100644 examples/ipsec-secgw/ipsec_worker.h

diff --git a/examples/ipsec-secgw/ipsec-secgw.c b/examples/ipsec-secgw/ipsec-secgw.c
index bebda38..c98620e 100644
--- a/examples/ipsec-secgw/ipsec-secgw.c
+++ b/examples/ipsec-secgw/ipsec-secgw.c
@@ -50,13 +50,12 @@
 
 #include "event_helper.h"
 #include "ipsec.h"
+#include "ipsec_worker.h"
 #include "parser.h"
 #include "sad.h"
 
 volatile bool force_quit;
 
-#define RTE_LOGTYPE_IPSEC RTE_LOGTYPE_USER1
-
 #define MAX_JUMBO_PKT_LEN  9600
 
 #define MEMPOOL_CACHE_SIZE 256
@@ -86,29 +85,6 @@ volatile bool force_quit;
 static uint16_t nb_rxd = IPSEC_SECGW_RX_DESC_DEFAULT;
 static uint16_t nb_txd = IPSEC_SECGW_TX_DESC_DEFAULT;
 
-#if RTE_BYTE_ORDER != RTE_LITTLE_ENDIAN
-#define __BYTES_TO_UINT64(a, b, c, d, e, f, g, h) \
-	(((uint64_t)((a) & 0xff) << 56) | \
-	((uint64_t)((b) & 0xff) << 48) | \
-	((uint64_t)((c) & 0xff) << 40) | \
-	((uint64_t)((d) & 0xff) << 32) | \
-	((uint64_t)((e) & 0xff) << 24) | \
-	((uint64_t)((f) & 0xff) << 16) | \
-	((uint64_t)((g) & 0xff) << 8)  | \
-	((uint64_t)(h) & 0xff))
-#else
-#define __BYTES_TO_UINT64(a, b, c, d, e, f, g, h) \
-	(((uint64_t)((h) & 0xff) << 56) | \
-	((uint64_t)((g) & 0xff) << 48) | \
-	((uint64_t)((f) & 0xff) << 40) | \
-	((uint64_t)((e) & 0xff) << 32) | \
-	((uint64_t)((d) & 0xff) << 24) | \
-	((uint64_t)((c) & 0xff) << 16) | \
-	((uint64_t)((b) & 0xff) << 8) | \
-	((uint64_t)(a) & 0xff))
-#endif
-#define ETHADDR(a, b, c, d, e, f) (__BYTES_TO_UINT64(a, b, c, d, e, f, 0, 0))
-
 #define ETHADDR_TO_UINT64(addr) __BYTES_TO_UINT64( \
 		(addr)->addr_bytes[0], (addr)->addr_bytes[1], \
 		(addr)->addr_bytes[2], (addr)->addr_bytes[3], \
@@ -120,11 +96,6 @@ static uint16_t nb_txd = IPSEC_SECGW_TX_DESC_DEFAULT;
 
 #define MTU_TO_FRAMELEN(x)	((x) + RTE_ETHER_HDR_LEN + RTE_ETHER_CRC_LEN)
 
-/* port/source ethernet addr and destination ethernet addr */
-struct ethaddr_info {
-	uint64_t src, dst;
-};
-
 struct ethaddr_info ethaddr_tbl[RTE_MAX_ETHPORTS] = {
 	{ 0, ETHADDR(0x00, 0x16, 0x3e, 0x7e, 0x94, 0x9a) },
 	{ 0, ETHADDR(0x00, 0x16, 0x3e, 0x22, 0xa1, 0xd9) },
diff --git a/examples/ipsec-secgw/ipsec-secgw.h b/examples/ipsec-secgw/ipsec-secgw.h
index a07a920..4b53cb5 100644
--- a/examples/ipsec-secgw/ipsec-secgw.h
+++ b/examples/ipsec-secgw/ipsec-secgw.h
@@ -8,6 +8,69 @@
 
 #define NB_SOCKETS 4
 
+#define MAX_PKT_BURST 32
+
+#define RTE_LOGTYPE_IPSEC RTE_LOGTYPE_USER1
+
+#if RTE_BYTE_ORDER != RTE_LITTLE_ENDIAN
+#define __BYTES_TO_UINT64(a, b, c, d, e, f, g, h) \
+	(((uint64_t)((a) & 0xff) << 56) | \
+	((uint64_t)((b) & 0xff) << 48) | \
+	((uint64_t)((c) & 0xff) << 40) | \
+	((uint64_t)((d) & 0xff) << 32) | \
+	((uint64_t)((e) & 0xff) << 24) | \
+	((uint64_t)((f) & 0xff) << 16) | \
+	((uint64_t)((g) & 0xff) << 8)  | \
+	((uint64_t)(h) & 0xff))
+#else
+#define __BYTES_TO_UINT64(a, b, c, d, e, f, g, h) \
+	(((uint64_t)((h) & 0xff) << 56) | \
+	((uint64_t)((g) & 0xff) << 48) | \
+	((uint64_t)((f) & 0xff) << 40) | \
+	((uint64_t)((e) & 0xff) << 32) | \
+	((uint64_t)((d) & 0xff) << 24) | \
+	((uint64_t)((c) & 0xff) << 16) | \
+	((uint64_t)((b) & 0xff) << 8) | \
+	((uint64_t)(a) & 0xff))
+#endif
+
+#define ETHADDR(a, b, c, d, e, f) (__BYTES_TO_UINT64(a, b, c, d, e, f, 0, 0))
+
+struct traffic_type {
+	const uint8_t *data[MAX_PKT_BURST * 2];
+	struct rte_mbuf *pkts[MAX_PKT_BURST * 2];
+	void *saptr[MAX_PKT_BURST * 2];
+	uint32_t res[MAX_PKT_BURST * 2];
+	uint32_t num;
+};
+
+struct ipsec_traffic {
+	struct traffic_type ipsec;
+	struct traffic_type ip4;
+	struct traffic_type ip6;
+};
+
+/* Fields optimized for devices without burst */
+struct traffic_type_nb {
+	const uint8_t *data;
+	struct rte_mbuf *pkt;
+	uint32_t res;
+	uint32_t num;
+};
+
+struct ipsec_traffic_nb {
+	struct traffic_type_nb ipsec;
+	struct traffic_type_nb ip4;
+	struct traffic_type_nb ip6;
+};
+
+/* port/source ethernet addr and destination ethernet addr */
+struct ethaddr_info {
+	uint64_t src, dst;
+};
+
+extern struct ethaddr_info ethaddr_tbl[RTE_MAX_ETHPORTS];
+
 /* Port mask to identify the unprotected ports */
 extern uint32_t unprotected_port_mask;
 
diff --git a/examples/ipsec-secgw/ipsec.h b/examples/ipsec-secgw/ipsec.h
index ad913bf..f8f29f9 100644
--- a/examples/ipsec-secgw/ipsec.h
+++ b/examples/ipsec-secgw/ipsec.h
@@ -15,11 +15,9 @@
 
 #include "ipsec-secgw.h"
 
-#define RTE_LOGTYPE_IPSEC       RTE_LOGTYPE_USER1
 #define RTE_LOGTYPE_IPSEC_ESP   RTE_LOGTYPE_USER2
 #define RTE_LOGTYPE_IPSEC_IPIP  RTE_LOGTYPE_USER3
 
-#define MAX_PKT_BURST 32
 #define MAX_INFLIGHT 128
 #define MAX_QP_PER_LCORE 256
 
@@ -259,20 +257,6 @@ struct cnt_blk {
 	uint32_t cnt;
 } __attribute__((packed));
 
-struct traffic_type {
-	const uint8_t *data[MAX_PKT_BURST * 2];
-	struct rte_mbuf *pkts[MAX_PKT_BURST * 2];
-	void *saptr[MAX_PKT_BURST * 2];
-	uint32_t res[MAX_PKT_BURST * 2];
-	uint32_t num;
-};
-
-struct ipsec_traffic {
-	struct traffic_type ipsec;
-	struct traffic_type ip4;
-	struct traffic_type ip6;
-};
-
 /* Socket ctx */
 extern struct socket_ctx socket_ctx[NB_SOCKETS];
 
diff --git a/examples/ipsec-secgw/ipsec_worker.c b/examples/ipsec-secgw/ipsec_worker.c
index b7a1ef9..6313c98 100644
--- a/examples/ipsec-secgw/ipsec_worker.c
+++ b/examples/ipsec-secgw/ipsec_worker.c
@@ -2,11 +2,51 @@
  * Copyright(c) 2010-2016 Intel Corporation
  * Copyright (C) 2020 Marvell International Ltd.
  */
+#include <rte_acl.h>
 #include <rte_event_eth_tx_adapter.h>
+#include <rte_lpm.h>
+#include <rte_lpm6.h>
 
 #include "event_helper.h"
 #include "ipsec.h"
 #include "ipsec-secgw.h"
+#include "ipsec_worker.h"
+
+static inline enum pkt_type
+process_ipsec_get_pkt_type(struct rte_mbuf *pkt, uint8_t **nlp)
+{
+	struct rte_ether_hdr *eth;
+
+	eth = rte_pktmbuf_mtod(pkt, struct rte_ether_hdr *);
+	if (eth->ether_type == rte_cpu_to_be_16(RTE_ETHER_TYPE_IPV4)) {
+		*nlp = RTE_PTR_ADD(eth, RTE_ETHER_HDR_LEN +
+				offsetof(struct ip, ip_p));
+		if (**nlp == IPPROTO_ESP)
+			return PKT_TYPE_IPSEC_IPV4;
+		else
+			return PKT_TYPE_PLAIN_IPV4;
+	} else if (eth->ether_type == rte_cpu_to_be_16(RTE_ETHER_TYPE_IPV6)) {
+		*nlp = RTE_PTR_ADD(eth, RTE_ETHER_HDR_LEN +
+				offsetof(struct ip6_hdr, ip6_nxt));
+		if (**nlp == IPPROTO_ESP)
+			return PKT_TYPE_IPSEC_IPV6;
+		else
+			return PKT_TYPE_PLAIN_IPV6;
+	}
+
+	/* Unknown/Unsupported type */
+	return PKT_TYPE_INVALID;
+}
+
+static inline void
+update_mac_addrs(struct rte_mbuf *pkt, uint16_t portid)
+{
+	struct rte_ether_hdr *ethhdr;
+
+	ethhdr = rte_pktmbuf_mtod(pkt, struct rte_ether_hdr *);
+	memcpy(&ethhdr->s_addr, &ethaddr_tbl[portid].src, RTE_ETHER_ADDR_LEN);
+	memcpy(&ethhdr->d_addr, &ethaddr_tbl[portid].dst, RTE_ETHER_ADDR_LEN);
+}
 
 static inline void
 ipsec_event_pre_forward(struct rte_mbuf *m, unsigned int port_id)
@@ -61,6 +101,290 @@ prepare_out_sessions_tbl(struct sa_ctx *sa_out,
 	}
 }
 
+static inline int
+check_sp(struct sp_ctx *sp, const uint8_t *nlp, uint32_t *sa_idx)
+{
+	uint32_t res;
+
+	if (unlikely(sp == NULL))
+		return 0;
+
+	rte_acl_classify((struct rte_acl_ctx *)sp, &nlp, &res, 1,
+			DEFAULT_MAX_CATEGORIES);
+
+	if (unlikely(res == 0)) {
+		/* No match */
+		return 0;
+	}
+
+	if (res == DISCARD)
+		return 0;
+	else if (res == BYPASS) {
+		*sa_idx = -1;
+		return 1;
+	}
+
+	*sa_idx = res - 1;
+	return 1;
+}
+
+static inline uint16_t
+route4_pkt(struct rte_mbuf *pkt, struct rt_ctx *rt_ctx)
+{
+	uint32_t dst_ip;
+	uint16_t offset;
+	uint32_t hop;
+	int ret;
+
+	offset = RTE_ETHER_HDR_LEN + offsetof(struct ip, ip_dst);
+	dst_ip = *rte_pktmbuf_mtod_offset(pkt, uint32_t *, offset);
+	dst_ip = rte_be_to_cpu_32(dst_ip);
+
+	ret = rte_lpm_lookup((struct rte_lpm *)rt_ctx, dst_ip, &hop);
+
+	if (ret == 0) {
+		/* We have a hit */
+		return hop;
+	}
+
+	/* else */
+	return RTE_MAX_ETHPORTS;
+}
+
+/* TODO: To be tested */
+static inline uint16_t
+route6_pkt(struct rte_mbuf *pkt, struct rt_ctx *rt_ctx)
+{
+	uint8_t dst_ip[16];
+	uint8_t *ip6_dst;
+	uint16_t offset;
+	uint32_t hop;
+	int ret;
+
+	offset = RTE_ETHER_HDR_LEN + offsetof(struct ip6_hdr, ip6_dst);
+	ip6_dst = rte_pktmbuf_mtod_offset(pkt, uint8_t *, offset);
+	memcpy(&dst_ip[0], ip6_dst, 16);
+
+	ret = rte_lpm6_lookup((struct rte_lpm6 *)rt_ctx, dst_ip, &hop);
+
+	if (ret == 0) {
+		/* We have a hit */
+		return hop;
+	}
+
+	/* else */
+	return RTE_MAX_ETHPORTS;
+}
+
+static inline uint16_t
+get_route(struct rte_mbuf *pkt, struct route_table *rt, enum pkt_type type)
+{
+	if (type == PKT_TYPE_PLAIN_IPV4 || type == PKT_TYPE_IPSEC_IPV4)
+		return route4_pkt(pkt, rt->rt4_ctx);
+	else if (type == PKT_TYPE_PLAIN_IPV6 || type == PKT_TYPE_IPSEC_IPV6)
+		return route6_pkt(pkt, rt->rt6_ctx);
+
+	return RTE_MAX_ETHPORTS;
+}
+
+static inline int
+process_ipsec_ev_inbound(struct ipsec_ctx *ctx, struct route_table *rt,
+		struct rte_event *ev)
+{
+	struct ipsec_sa *sa = NULL;
+	struct rte_mbuf *pkt;
+	uint16_t port_id = 0;
+	enum pkt_type type;
+	uint32_t sa_idx;
+	uint8_t *nlp;
+
+	/* Get pkt from event */
+	pkt = ev->mbuf;
+
+	/* Check the packet type */
+	type = process_ipsec_get_pkt_type(pkt, &nlp);
+
+	switch (type) {
+	case PKT_TYPE_PLAIN_IPV4:
+		if (pkt->ol_flags & PKT_RX_SEC_OFFLOAD) {
+			if (unlikely(pkt->ol_flags &
+				     PKT_RX_SEC_OFFLOAD_FAILED)) {
+				RTE_LOG(ERR, IPSEC,
+					"Inbound security offload failed\n");
+				goto drop_pkt_and_exit;
+			}
+			sa = pkt->userdata;
+		}
+
+		/* Check if we have a match */
+		if (check_sp(ctx->sp4_ctx, nlp, &sa_idx) == 0) {
+			/* No valid match */
+			goto drop_pkt_and_exit;
+		}
+		break;
+
+	case PKT_TYPE_PLAIN_IPV6:
+		if (pkt->ol_flags & PKT_RX_SEC_OFFLOAD) {
+			if (unlikely(pkt->ol_flags &
+				     PKT_RX_SEC_OFFLOAD_FAILED)) {
+				RTE_LOG(ERR, IPSEC,
+					"Inbound security offload failed\n");
+				goto drop_pkt_and_exit;
+			}
+			sa = pkt->userdata;
+		}
+
+		/* Check if we have a match */
+		if (check_sp(ctx->sp6_ctx, nlp, &sa_idx) == 0) {
+			/* No valid match */
+			goto drop_pkt_and_exit;
+		}
+		break;
+
+	default:
+		RTE_LOG(ERR, IPSEC, "Unsupported packet type = %d\n", type);
+		goto drop_pkt_and_exit;
+	}
+
+	/* Check if the packet has to be bypassed */
+	if (sa_idx == BYPASS)
+		goto route_and_send_pkt;
+
+	/* Validate sa_idx */
+	if (sa_idx >= ctx->sa_ctx->nb_sa)
+		goto drop_pkt_and_exit;
+
+	/* Else the packet has to be protected with SA */
+
+	/* If the packet was IPsec processed, then SA pointer should be set */
+	if (sa == NULL)
+		goto drop_pkt_and_exit;
+
+	/* SPI on the packet should match with the one in SA */
+	if (unlikely(sa->spi != ctx->sa_ctx->sa[sa_idx].spi))
+		goto drop_pkt_and_exit;
+
+route_and_send_pkt:
+	port_id = get_route(pkt, rt, type);
+	if (unlikely(port_id == RTE_MAX_ETHPORTS)) {
+		/* no match */
+		goto drop_pkt_and_exit;
+	}
+	/* else, we have a matching route */
+
+	/* Update mac addresses */
+	update_mac_addrs(pkt, port_id);
+
+	/* Update the event with the dest port */
+	ipsec_event_pre_forward(pkt, port_id);
+	return 1;
+
+drop_pkt_and_exit:
+	RTE_LOG(ERR, IPSEC, "Inbound packet dropped\n");
+	rte_pktmbuf_free(pkt);
+	ev->mbuf = NULL;
+	return 0;
+}
+
+static inline int
+process_ipsec_ev_outbound(struct ipsec_ctx *ctx, struct route_table *rt,
+		struct rte_event *ev)
+{
+	struct rte_ipsec_session *sess;
+	struct sa_ctx *sa_ctx;
+	struct rte_mbuf *pkt;
+	uint16_t port_id = 0;
+	struct ipsec_sa *sa;
+	enum pkt_type type;
+	uint32_t sa_idx;
+	uint8_t *nlp;
+
+	/* Get pkt from event */
+	pkt = ev->mbuf;
+
+	/* Check the packet type */
+	type = process_ipsec_get_pkt_type(pkt, &nlp);
+
+	switch (type) {
+	case PKT_TYPE_PLAIN_IPV4:
+		/* Check if we have a match */
+		if (check_sp(ctx->sp4_ctx, nlp, &sa_idx) == 0) {
+			/* No valid match */
+			goto drop_pkt_and_exit;
+		}
+		break;
+	case PKT_TYPE_PLAIN_IPV6:
+		/* Check if we have a match */
+		if (check_sp(ctx->sp6_ctx, nlp, &sa_idx) == 0) {
+			/* No valid match */
+			goto drop_pkt_and_exit;
+		}
+		break;
+	default:
+		/*
+		 * Only plain IPv4 & IPv6 packets are allowed
+		 * on protected port. Drop the rest.
+		 */
+		RTE_LOG(ERR, IPSEC, "Unsupported packet type = %d\n", type);
+		goto drop_pkt_and_exit;
+	}
+
+	/* Check if the packet has to be bypassed */
+	if (sa_idx == BYPASS) {
+		port_id = get_route(pkt, rt, type);
+		if (unlikely(port_id == RTE_MAX_ETHPORTS)) {
+			/* no match */
+			goto drop_pkt_and_exit;
+		}
+		/* else, we have a matching route */
+		goto send_pkt;
+	}
+
+	/* Validate sa_idx */
+	if (sa_idx >= ctx->sa_ctx->nb_sa)
+		goto drop_pkt_and_exit;
+
+	/* Else the packet has to be protected */
+
+	/* Get SA ctx*/
+	sa_ctx = ctx->sa_ctx;
+
+	/* Get SA */
+	sa = &(sa_ctx->sa[sa_idx]);
+
+	/* Get IPsec session */
+	sess = ipsec_get_primary_session(sa);
+
+	/* Allow only inline protocol for now */
+	if (sess->type != RTE_SECURITY_ACTION_TYPE_INLINE_PROTOCOL) {
+		RTE_LOG(ERR, IPSEC, "SA type not supported\n");
+		goto drop_pkt_and_exit;
+	}
+
+	if (sess->security.ol_flags & RTE_SECURITY_TX_OLOAD_NEED_MDATA)
+		pkt->userdata = sess->security.ses;
+
+	/* Mark the packet for Tx security offload */
+	pkt->ol_flags |= PKT_TX_SEC_OFFLOAD;
+
+	/* Get the port to which this pkt need to be submitted */
+	port_id = sa->portid;
+
+send_pkt:
+	/* Update mac addresses */
+	update_mac_addrs(pkt, port_id);
+
+	/* Update the event with the dest port */
+	ipsec_event_pre_forward(pkt, port_id);
+	return 1;
+
+drop_pkt_and_exit:
+	RTE_LOG(ERR, IPSEC, "Outbound packet dropped\n");
+	rte_pktmbuf_free(pkt);
+	ev->mbuf = NULL;
+	return 0;
+}
+
 /*
  * Event mode exposes various operating modes depending on the
  * capabilities of the event device and the operating mode
@@ -68,7 +392,7 @@ prepare_out_sessions_tbl(struct sa_ctx *sa_out,
  */
 
 /* Workers registered */
-#define IPSEC_EVENTMODE_WORKERS		1
+#define IPSEC_EVENTMODE_WORKERS		2
 
 /*
  * Event mode worker
@@ -146,7 +470,7 @@ ipsec_wrkr_non_burst_int_port_drv_mode(struct eh_event_link_info *links,
 			}
 
 			/* Save security session */
-			pkt->udata64 = (uint64_t) sess_tbl[port_id];
+			pkt->userdata = sess_tbl[port_id];
 
 			/* Mark the packet for Tx security offload */
 			pkt->ol_flags |= PKT_TX_SEC_OFFLOAD;
@@ -165,6 +489,94 @@ ipsec_wrkr_non_burst_int_port_drv_mode(struct eh_event_link_info *links,
 	}
 }
 
+/*
+ * Event mode worker
+ * Operating parameters : non-burst - Tx internal port - app mode
+ */
+static void
+ipsec_wrkr_non_burst_int_port_app_mode(struct eh_event_link_info *links,
+		uint8_t nb_links)
+{
+	struct lcore_conf_ev_tx_int_port_wrkr lconf;
+	unsigned int nb_rx = 0;
+	struct rte_event ev;
+	uint32_t lcore_id;
+	int32_t socket_id;
+	int ret;
+
+	/* Check if we have links registered for this lcore */
+	if (nb_links == 0) {
+		/* No links registered - exit */
+		return;
+	}
+
+	/* We have valid links */
+
+	/* Get core ID */
+	lcore_id = rte_lcore_id();
+
+	/* Get socket ID */
+	socket_id = rte_lcore_to_socket_id(lcore_id);
+
+	/* Save routing table */
+	lconf.rt.rt4_ctx = socket_ctx[socket_id].rt_ip4;
+	lconf.rt.rt6_ctx = socket_ctx[socket_id].rt_ip6;
+	lconf.inbound.sp4_ctx = socket_ctx[socket_id].sp_ip4_in;
+	lconf.inbound.sp6_ctx = socket_ctx[socket_id].sp_ip6_in;
+	lconf.inbound.sa_ctx = socket_ctx[socket_id].sa_in;
+	lconf.inbound.session_pool = socket_ctx[socket_id].session_pool;
+	lconf.outbound.sp4_ctx = socket_ctx[socket_id].sp_ip4_out;
+	lconf.outbound.sp6_ctx = socket_ctx[socket_id].sp_ip6_out;
+	lconf.outbound.sa_ctx = socket_ctx[socket_id].sa_out;
+	lconf.outbound.session_pool = socket_ctx[socket_id].session_pool;
+
+	RTE_LOG(INFO, IPSEC,
+		"Launching event mode worker (non-burst - Tx internal port - "
+		"app mode) on lcore %d\n", lcore_id);
+
+	/* Check if it's single link */
+	if (nb_links != 1) {
+		RTE_LOG(INFO, IPSEC,
+			"Multiple links not supported. Using first link\n");
+	}
+
+	RTE_LOG(INFO, IPSEC, " -- lcoreid=%u event_port_id=%u\n", lcore_id,
+		links[0].event_port_id);
+
+	while (!force_quit) {
+		/* Read packet from event queues */
+		nb_rx = rte_event_dequeue_burst(links[0].eventdev_id,
+				links[0].event_port_id,
+				&ev,     /* events */
+				1,       /* nb_events */
+				0        /* timeout_ticks */);
+
+		if (nb_rx == 0)
+			continue;
+
+		if (is_unprotected_port(ev.mbuf->port))
+			ret = process_ipsec_ev_inbound(&lconf.inbound,
+							&lconf.rt, &ev);
+		else
+			ret = process_ipsec_ev_outbound(&lconf.outbound,
+							&lconf.rt, &ev);
+		if (ret != 1)
+			/* The pkt has been dropped */
+			continue;
+
+		/*
+		 * Since tx internal port is available, events can be
+		 * directly enqueued to the adapter and it would be
+		 * internally submitted to the eth device.
+		 */
+		rte_event_eth_tx_adapter_enqueue(links[0].eventdev_id,
+				links[0].event_port_id,
+				&ev,	/* events */
+				1,	/* nb_events */
+				0	/* flags */);
+	}
+}
+
 static uint8_t
 ipsec_eventmode_populate_wrkr_params(struct eh_app_worker_params *wrkrs)
 {
@@ -180,6 +592,14 @@ ipsec_eventmode_populate_wrkr_params(struct eh_app_worker_params *wrkrs)
 	wrkr->cap.ipsec_mode = EH_IPSEC_MODE_TYPE_DRIVER;
 	wrkr->worker_thread = ipsec_wrkr_non_burst_int_port_drv_mode;
 	wrkr++;
+	nb_wrkr_param++;
+
+	/* Non-burst - Tx internal port - app mode */
+	wrkr->cap.burst = EH_RX_TYPE_NON_BURST;
+	wrkr->cap.tx_internal_port = EH_TX_TYPE_INTERNAL_PORT;
+	wrkr->cap.ipsec_mode = EH_IPSEC_MODE_TYPE_APP;
+	wrkr->worker_thread = ipsec_wrkr_non_burst_int_port_app_mode;
+	nb_wrkr_param++;
 
 	return nb_wrkr_param;
 }
diff --git a/examples/ipsec-secgw/ipsec_worker.h b/examples/ipsec-secgw/ipsec_worker.h
new file mode 100644
index 0000000..87b4f22
--- /dev/null
+++ b/examples/ipsec-secgw/ipsec_worker.h
@@ -0,0 +1,35 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright (C) 2020 Marvell International Ltd.
+ */
+#ifndef _IPSEC_WORKER_H_
+#define _IPSEC_WORKER_H_
+
+#include "ipsec.h"
+
+enum pkt_type {
+	PKT_TYPE_PLAIN_IPV4 = 1,
+	PKT_TYPE_IPSEC_IPV4,
+	PKT_TYPE_PLAIN_IPV6,
+	PKT_TYPE_IPSEC_IPV6,
+	PKT_TYPE_INVALID
+};
+
+struct route_table {
+	struct rt_ctx *rt4_ctx;
+	struct rt_ctx *rt6_ctx;
+};
+
+/*
+ * Conf required by event mode worker with tx internal port
+ */
+struct lcore_conf_ev_tx_int_port_wrkr {
+	struct ipsec_ctx inbound;
+	struct ipsec_ctx outbound;
+	struct route_table rt;
+} __rte_cache_aligned;
+
+void ipsec_poll_mode_worker(void);
+
+int ipsec_launch_one_lcore(void *args);
+
+#endif /* _IPSEC_WORKER_H_ */
-- 
2.7.4