1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright(c) 2010-2016 Intel Corporation 3 */ 4 5 #ifndef __L3FWD_EM_SEQUENTIAL_H__ 6 #define __L3FWD_EM_SEQUENTIAL_H__ 7 8 /** 9 * @file 10 * This is an optional implementation of packet classification in Exact-Match 11 * path using sequential packet classification method. 12 * While hash lookup multi seems to provide better performance, it's disabled 13 * by default and can be enabled with NO_HASH_LOOKUP_MULTI global define in 14 * compilation time. 15 */ 16 17 #if defined RTE_ARCH_X86 18 #include "l3fwd_sse.h" 19 #elif defined RTE_MACHINE_CPUFLAG_NEON 20 #include "l3fwd_neon.h" 21 #endif 22 23 static __rte_always_inline uint16_t 24 em_get_dst_port(const struct lcore_conf *qconf, struct rte_mbuf *pkt, 25 uint16_t portid) 26 { 27 uint8_t next_hop; 28 struct ipv4_hdr *ipv4_hdr; 29 struct ipv6_hdr *ipv6_hdr; 30 uint32_t tcp_or_udp; 31 uint32_t l3_ptypes; 32 33 tcp_or_udp = pkt->packet_type & (RTE_PTYPE_L4_TCP | RTE_PTYPE_L4_UDP); 34 l3_ptypes = pkt->packet_type & RTE_PTYPE_L3_MASK; 35 36 if (tcp_or_udp && (l3_ptypes == RTE_PTYPE_L3_IPV4)) { 37 38 /* Handle IPv4 headers.*/ 39 ipv4_hdr = rte_pktmbuf_mtod_offset(pkt, struct ipv4_hdr *, 40 sizeof(struct ether_hdr)); 41 42 next_hop = em_get_ipv4_dst_port(ipv4_hdr, portid, 43 qconf->ipv4_lookup_struct); 44 45 if (next_hop >= RTE_MAX_ETHPORTS || 46 (enabled_port_mask & 1 << next_hop) == 0) 47 next_hop = portid; 48 49 return next_hop; 50 51 } else if (tcp_or_udp && (l3_ptypes == RTE_PTYPE_L3_IPV6)) { 52 53 /* Handle IPv6 headers.*/ 54 ipv6_hdr = rte_pktmbuf_mtod_offset(pkt, struct ipv6_hdr *, 55 sizeof(struct ether_hdr)); 56 57 next_hop = em_get_ipv6_dst_port(ipv6_hdr, portid, 58 qconf->ipv6_lookup_struct); 59 60 if (next_hop >= RTE_MAX_ETHPORTS || 61 (enabled_port_mask & 1 << next_hop) == 0) 62 next_hop = portid; 63 64 return next_hop; 65 66 } 67 68 return portid; 69 } 70 71 /* 72 * Buffer optimized handling of packets, invoked 73 * from main_loop. 74 */ 75 static inline void 76 l3fwd_em_send_packets(int nb_rx, struct rte_mbuf **pkts_burst, 77 uint16_t portid, struct lcore_conf *qconf) 78 { 79 int32_t i, j; 80 uint16_t dst_port[MAX_PKT_BURST]; 81 82 if (nb_rx > 0) { 83 rte_prefetch0(rte_pktmbuf_mtod(pkts_burst[0], 84 struct ether_hdr *) + 1); 85 } 86 87 for (i = 1, j = 0; j < nb_rx; i++, j++) { 88 if (i < nb_rx) { 89 rte_prefetch0(rte_pktmbuf_mtod(pkts_burst[i], 90 struct ether_hdr *) + 1); 91 } 92 dst_port[j] = em_get_dst_port(qconf, pkts_burst[j], portid); 93 } 94 95 send_packets_multi(qconf, pkts_burst, dst_port, nb_rx); 96 } 97 #endif /* __L3FWD_EM_SEQUENTIAL_H__ */ 98