examples/l3fwd/l3fwd_em_hlm.h

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2016-2018 Intel Corporation.
   3  * Copyright(c) 2017-2018 Linaro Limited.
   4  */
   5
   6 #ifndef __L3FWD_EM_HLM_H__
   7 #define __L3FWD_EM_HLM_H__
   8
   9 #if defined RTE_ARCH_X86
  10 #include "l3fwd_sse.h"
  11 #include "l3fwd_em_hlm_sse.h"
  12 #elif defined RTE_MACHINE_CPUFLAG_NEON
  13 #include "l3fwd_neon.h"
  14 #include "l3fwd_em_hlm_neon.h"
  15 #endif
  16
  17 #ifdef RTE_ARCH_ARM64
  18 #define EM_HASH_LOOKUP_COUNT 16
  19 #else
  20 #define EM_HASH_LOOKUP_COUNT 8
  21 #endif
  22
  23
  24 static __rte_always_inline void
  25 em_get_dst_port_ipv4xN(struct lcore_conf *qconf, struct rte_mbuf *m[],
  26                 uint16_t portid, uint16_t dst_port[])
  27 {
  28         int i;
  29         int32_t ret[EM_HASH_LOOKUP_COUNT];
  30         union ipv4_5tuple_host key[EM_HASH_LOOKUP_COUNT];
  31         const void *key_array[EM_HASH_LOOKUP_COUNT];
  32
  33         for (i = 0; i < EM_HASH_LOOKUP_COUNT; i++) {
  34                 get_ipv4_5tuple(m[i], mask0.x, &key[i]);
  35                 key_array[i] = &key[i];
  36         }
  37
  38         rte_hash_lookup_bulk(qconf->ipv4_lookup_struct, &key_array[0],
  39                              EM_HASH_LOOKUP_COUNT, ret);
  40
  41         for (i = 0; i < EM_HASH_LOOKUP_COUNT; i++) {
  42                 dst_port[i] = ((ret[i] < 0) ?
  43                                 portid : ipv4_l3fwd_out_if[ret[i]]);
  44
  45                 if (dst_port[i] >= RTE_MAX_ETHPORTS ||
  46                                 (enabled_port_mask & 1 << dst_port[i]) == 0)
  47                         dst_port[i] = portid;
  48         }
  49 }
  50
  51 static __rte_always_inline void
  52 em_get_dst_port_ipv6xN(struct lcore_conf *qconf, struct rte_mbuf *m[],
  53                 uint16_t portid, uint16_t dst_port[])
  54 {
  55         int i;
  56         int32_t ret[EM_HASH_LOOKUP_COUNT];
  57         union ipv6_5tuple_host key[EM_HASH_LOOKUP_COUNT];
  58         const void *key_array[EM_HASH_LOOKUP_COUNT];
  59
  60         for (i = 0; i < EM_HASH_LOOKUP_COUNT; i++) {
  61                 get_ipv6_5tuple(m[i], mask1.x, mask2.x, &key[i]);
  62                 key_array[i] = &key[i];
  63         }
  64
  65         rte_hash_lookup_bulk(qconf->ipv6_lookup_struct, &key_array[0],
  66                              EM_HASH_LOOKUP_COUNT, ret);
  67
  68         for (i = 0; i < EM_HASH_LOOKUP_COUNT; i++) {
  69                 dst_port[i] = ((ret[i] < 0) ?
  70                                 portid : ipv6_l3fwd_out_if[ret[i]]);
  71
  72                 if (dst_port[i] >= RTE_MAX_ETHPORTS ||
  73                                 (enabled_port_mask & 1 << dst_port[i]) == 0)
  74                         dst_port[i] = portid;
  75         }
  76 }
  77
  78 static __rte_always_inline uint16_t
  79 em_get_dst_port(const struct lcore_conf *qconf, struct rte_mbuf *pkt,
  80                 uint16_t portid)
  81 {
  82         uint16_t next_hop;
  83         struct ipv4_hdr *ipv4_hdr;
  84         struct ipv6_hdr *ipv6_hdr;
  85         uint32_t tcp_or_udp;
  86         uint32_t l3_ptypes;
  87
  88         tcp_or_udp = pkt->packet_type & (RTE_PTYPE_L4_TCP | RTE_PTYPE_L4_UDP);
  89         l3_ptypes = pkt->packet_type & RTE_PTYPE_L3_MASK;
  90
  91         if (tcp_or_udp && (l3_ptypes == RTE_PTYPE_L3_IPV4)) {
  92
  93                 /* Handle IPv4 headers.*/
  94                 ipv4_hdr = rte_pktmbuf_mtod_offset(pkt, struct ipv4_hdr *,
  95                                 sizeof(struct rte_ether_hdr));
  96
  97                 next_hop = em_get_ipv4_dst_port(ipv4_hdr, portid,
  98                                 qconf->ipv4_lookup_struct);
  99
 100                 if (next_hop >= RTE_MAX_ETHPORTS ||
 101                                 (enabled_port_mask & 1 << next_hop) == 0)
 102                         next_hop = portid;
 103
 104                 return next_hop;
 105
 106         } else if (tcp_or_udp && (l3_ptypes == RTE_PTYPE_L3_IPV6)) {
 107
 108                 /* Handle IPv6 headers.*/
 109                 ipv6_hdr = rte_pktmbuf_mtod_offset(pkt, struct ipv6_hdr *,
 110                                 sizeof(struct rte_ether_hdr));
 111
 112                 next_hop = em_get_ipv6_dst_port(ipv6_hdr, portid,
 113                                 qconf->ipv6_lookup_struct);
 114
 115                 if (next_hop >= RTE_MAX_ETHPORTS ||
 116                                 (enabled_port_mask & 1 << next_hop) == 0)
 117                         next_hop = portid;
 118
 119                 return next_hop;
 120
 121         }
 122
 123         return portid;
 124 }
 125
 126 /*
 127  * Buffer optimized handling of packets, invoked
 128  * from main_loop.
 129  */
 130 static inline void
 131 l3fwd_em_send_packets(int nb_rx, struct rte_mbuf **pkts_burst,
 132                 uint16_t portid, struct lcore_conf *qconf)
 133 {
 134         int32_t i, j, pos;
 135         uint16_t dst_port[MAX_PKT_BURST];
 136
 137         /*
 138          * Send nb_rx - nb_rx % EM_HASH_LOOKUP_COUNT packets
 139          * in groups of EM_HASH_LOOKUP_COUNT.
 140          */
 141         int32_t n = RTE_ALIGN_FLOOR(nb_rx, EM_HASH_LOOKUP_COUNT);
 142
 143         for (j = 0; j < EM_HASH_LOOKUP_COUNT && j < nb_rx; j++) {
 144                 rte_prefetch0(rte_pktmbuf_mtod(pkts_burst[j],
 145                                                struct rte_ether_hdr *) + 1);
 146         }
 147
 148         for (j = 0; j < n; j += EM_HASH_LOOKUP_COUNT) {
 149
 150                 uint32_t pkt_type = RTE_PTYPE_L3_MASK |
 151                                     RTE_PTYPE_L4_TCP | RTE_PTYPE_L4_UDP;
 152                 uint32_t l3_type, tcp_or_udp;
 153
 154                 for (i = 0; i < EM_HASH_LOOKUP_COUNT; i++)
 155                         pkt_type &= pkts_burst[j + i]->packet_type;
 156
 157                 l3_type = pkt_type & RTE_PTYPE_L3_MASK;
 158                 tcp_or_udp = pkt_type & (RTE_PTYPE_L4_TCP | RTE_PTYPE_L4_UDP);
 159
 160                 for (i = 0, pos = j + EM_HASH_LOOKUP_COUNT;
 161                      i < EM_HASH_LOOKUP_COUNT && pos < nb_rx; i++, pos++) {
 162                         rte_prefetch0(rte_pktmbuf_mtod(
 163                                         pkts_burst[pos],
 164                                         struct rte_ether_hdr *) + 1);
 165                 }
 166
 167                 if (tcp_or_udp && (l3_type == RTE_PTYPE_L3_IPV4)) {
 168
 169                         em_get_dst_port_ipv4xN(qconf, &pkts_burst[j], portid,
 170                                                &dst_port[j]);
 171
 172                 } else if (tcp_or_udp && (l3_type == RTE_PTYPE_L3_IPV6)) {
 173
 174                         em_get_dst_port_ipv6xN(qconf, &pkts_burst[j], portid,
 175                                                &dst_port[j]);
 176
 177                 } else {
 178                         for (i = 0; i < EM_HASH_LOOKUP_COUNT; i++)
 179                                 dst_port[j + i] = em_get_dst_port(qconf,
 180                                                 pkts_burst[j + i], portid);
 181                 }
 182         }
 183
 184         for (; j < nb_rx; j++)
 185                 dst_port[j] = em_get_dst_port(qconf, pkts_burst[j], portid);
 186
 187         send_packets_multi(qconf, pkts_burst, dst_port, nb_rx);
 188
 189 }
 190 #endif /* __L3FWD_EM_HLM_H__ */