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/* 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__ */
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