1 files changed, 109 insertions, 0 deletions
diff --git a/src/spdk/dpdk/examples/l3fwd/l3fwd_em.h b/src/spdk/dpdk/examples/l3fwd/l3fwd_em.h
new file mode 100644
index 00000000..228164e2
--- /dev/null
+++ b/src/spdk/dpdk/examples/l3fwd/l3fwd_em.h
@@ -0,0 +1,109 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2010-2016 Intel Corporation
+ */
+
+#ifndef __L3FWD_EM_H__
+#define __L3FWD_EM_H__
+
+static __rte_always_inline void
+l3fwd_em_simple_forward(struct rte_mbuf *m, uint16_t portid,
+		struct lcore_conf *qconf)
+{
+	struct ether_hdr *eth_hdr;
+	struct ipv4_hdr *ipv4_hdr;
+	uint16_t dst_port;
+	uint32_t tcp_or_udp;
+	uint32_t l3_ptypes;
+
+	eth_hdr = rte_pktmbuf_mtod(m, struct ether_hdr *);
+	tcp_or_udp = m->packet_type & (RTE_PTYPE_L4_TCP | RTE_PTYPE_L4_UDP);
+	l3_ptypes = m->packet_type & RTE_PTYPE_L3_MASK;
+
+	if (tcp_or_udp && (l3_ptypes == RTE_PTYPE_L3_IPV4)) {
+		/* Handle IPv4 headers.*/
+		ipv4_hdr = rte_pktmbuf_mtod_offset(m, struct ipv4_hdr *,
+						   sizeof(struct ether_hdr));
+
+#ifdef DO_RFC_1812_CHECKS
+		/* Check to make sure the packet is valid (RFC1812) */
+		if (is_valid_ipv4_pkt(ipv4_hdr, m->pkt_len) < 0) {
+			rte_pktmbuf_free(m);
+			return;
+		}
+#endif
+		dst_port = em_get_ipv4_dst_port(ipv4_hdr, portid,
+						qconf->ipv4_lookup_struct);
+
+		if (dst_port >= RTE_MAX_ETHPORTS ||
+			(enabled_port_mask & 1 << dst_port) == 0)
+			dst_port = portid;
+
+#ifdef DO_RFC_1812_CHECKS
+		/* Update time to live and header checksum */
+		--(ipv4_hdr->time_to_live);
+		++(ipv4_hdr->hdr_checksum);
+#endif
+		/* dst addr */
+		*(uint64_t *)&eth_hdr->d_addr = dest_eth_addr[dst_port];
+
+		/* src addr */
+		ether_addr_copy(&ports_eth_addr[dst_port], &eth_hdr->s_addr);
+
+		send_single_packet(qconf, m, dst_port);
+	} else if (tcp_or_udp && (l3_ptypes == RTE_PTYPE_L3_IPV6)) {
+		/* Handle IPv6 headers.*/
+		struct ipv6_hdr *ipv6_hdr;
+
+		ipv6_hdr = rte_pktmbuf_mtod_offset(m, struct ipv6_hdr *,
+						   sizeof(struct ether_hdr));
+
+		dst_port = em_get_ipv6_dst_port(ipv6_hdr, portid,
+					qconf->ipv6_lookup_struct);
+
+		if (dst_port >= RTE_MAX_ETHPORTS ||
+			(enabled_port_mask & 1 << dst_port) == 0)
+			dst_port = portid;
+
+		/* dst addr */
+		*(uint64_t *)&eth_hdr->d_addr = dest_eth_addr[dst_port];
+
+		/* src addr */
+		ether_addr_copy(&ports_eth_addr[dst_port], &eth_hdr->s_addr);
+
+		send_single_packet(qconf, m, dst_port);
+	} else {
+		/* Free the mbuf that contains non-IPV4/IPV6 packet */
+		rte_pktmbuf_free(m);
+	}
+}
+
+/*
+ * Buffer non-optimized handling of packets, invoked
+ * from main_loop.
+ */
+static inline void
+l3fwd_em_no_opt_send_packets(int nb_rx, struct rte_mbuf **pkts_burst,
+			uint16_t portid, struct lcore_conf *qconf)
+{
+	int32_t j;
+
+	/* Prefetch first packets */
+	for (j = 0; j < PREFETCH_OFFSET && j < nb_rx; j++)
+		rte_prefetch0(rte_pktmbuf_mtod(pkts_burst[j], void *));
+
+	/*
+	 * Prefetch and forward already prefetched
+	 * packets.
+	 */
+	for (j = 0; j < (nb_rx - PREFETCH_OFFSET); j++) {
+		rte_prefetch0(rte_pktmbuf_mtod(pkts_burst[
+				j + PREFETCH_OFFSET], void *));
+		l3fwd_em_simple_forward(pkts_burst[j], portid, qconf);
+	}
+
+	/* Forward remaining prefetched packets */
+	for (; j < nb_rx; j++)
+		l3fwd_em_simple_forward(pkts_burst[j], portid, qconf);
+}
+
+#endif /* __L3FWD_EM_H__ */