1 files changed, 97 insertions, 0 deletions
diff --git a/src/spdk/dpdk/examples/l3fwd/l3fwd_em_sequential.h b/src/spdk/dpdk/examples/l3fwd/l3fwd_em_sequential.h
new file mode 100644
index 00000000..35cf5eac
--- /dev/null
+++ b/src/spdk/dpdk/examples/l3fwd/l3fwd_em_sequential.h
@@ -0,0 +1,97 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2010-2016 Intel Corporation
+ */
+
+#ifndef __L3FWD_EM_SEQUENTIAL_H__
+#define __L3FWD_EM_SEQUENTIAL_H__
+
+/**
+ * @file
+ * This is an optional implementation of packet classification in Exact-Match
+ * path using sequential packet classification method.
+ * While hash lookup multi seems to provide better performance, it's disabled
+ * by default and can be enabled with NO_HASH_LOOKUP_MULTI global define in
+ * compilation time.
+ */
+
+#if defined RTE_ARCH_X86
+#include "l3fwd_sse.h"
+#elif defined RTE_MACHINE_CPUFLAG_NEON
+#include "l3fwd_neon.h"
+#endif
+
+static __rte_always_inline uint16_t
+em_get_dst_port(const struct lcore_conf *qconf, struct rte_mbuf *pkt,
+		uint16_t portid)
+{
+	uint8_t next_hop;
+	struct ipv4_hdr *ipv4_hdr;
+	struct ipv6_hdr *ipv6_hdr;
+	uint32_t tcp_or_udp;
+	uint32_t l3_ptypes;
+
+	tcp_or_udp = pkt->packet_type & (RTE_PTYPE_L4_TCP | RTE_PTYPE_L4_UDP);
+	l3_ptypes = pkt->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(pkt, struct ipv4_hdr *,
+				sizeof(struct ether_hdr));
+
+		next_hop = em_get_ipv4_dst_port(ipv4_hdr, portid,
+				qconf->ipv4_lookup_struct);
+
+		if (next_hop >= RTE_MAX_ETHPORTS ||
+				(enabled_port_mask & 1 << next_hop) == 0)
+			next_hop = portid;
+
+		return next_hop;
+
+	} else if (tcp_or_udp && (l3_ptypes == RTE_PTYPE_L3_IPV6)) {
+
+		/* Handle IPv6 headers.*/
+		ipv6_hdr = rte_pktmbuf_mtod_offset(pkt, struct ipv6_hdr *,
+				sizeof(struct ether_hdr));
+
+		next_hop = em_get_ipv6_dst_port(ipv6_hdr, portid,
+				qconf->ipv6_lookup_struct);
+
+		if (next_hop >= RTE_MAX_ETHPORTS ||
+				(enabled_port_mask & 1 << next_hop) == 0)
+			next_hop = portid;
+
+		return next_hop;
+
+	}
+
+	return portid;
+}
+
+/*
+ * Buffer optimized handling of packets, invoked
+ * from main_loop.
+ */
+static inline void
+l3fwd_em_send_packets(int nb_rx, struct rte_mbuf **pkts_burst,
+			uint16_t portid, struct lcore_conf *qconf)
+{
+	int32_t i, j;
+	uint16_t dst_port[MAX_PKT_BURST];
+
+	if (nb_rx > 0) {
+		rte_prefetch0(rte_pktmbuf_mtod(pkts_burst[0],
+					       struct ether_hdr *) + 1);
+	}
+
+	for (i = 1, j = 0; j < nb_rx; i++, j++) {
+		if (i < nb_rx) {
+			rte_prefetch0(rte_pktmbuf_mtod(pkts_burst[i],
+						       struct ether_hdr *) + 1);
+		}
+		dst_port[j] = em_get_dst_port(qconf, pkts_burst[j], portid);
+	}
+
+	send_packets_multi(qconf, pkts_burst, dst_port, nb_rx);
+}
+#endif /* __L3FWD_EM_SEQUENTIAL_H__ */