examples/l3fwd/l3fwd_em_sequential.h

   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 rte_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 rte_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 rte_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(
  90                                         pkts_burst[i],
  91                                         struct rte_ether_hdr *) + 1);
  92                 }
  93                 dst_port[j] = em_get_dst_port(qconf, pkts_burst[j], portid);
  94         }
  95
  96         send_packets_multi(qconf, pkts_burst, dst_port, nb_rx);
  97 }
  98 #endif /* __L3FWD_EM_SEQUENTIAL_H__ */