app/test-pmd/macfwd.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2014 Intel Corporation
   3  */
   4
   5 #include <stdarg.h>
   6 #include <string.h>
   7 #include <stdio.h>
   8 #include <errno.h>
   9 #include <stdint.h>
  10 #include <unistd.h>
  11 #include <inttypes.h>
  12
  13 #include <sys/queue.h>
  14 #include <sys/stat.h>
  15
  16 #include <rte_common.h>
  17 #include <rte_byteorder.h>
  18 #include <rte_log.h>
  19 #include <rte_debug.h>
  20 #include <rte_cycles.h>
  21 #include <rte_memory.h>
  22 #include <rte_memcpy.h>
  23 #include <rte_launch.h>
  24 #include <rte_eal.h>
  25 #include <rte_per_lcore.h>
  26 #include <rte_lcore.h>
  27 #include <rte_atomic.h>
  28 #include <rte_branch_prediction.h>
  29 #include <rte_mempool.h>
  30 #include <rte_mbuf.h>
  31 #include <rte_interrupts.h>
  32 #include <rte_pci.h>
  33 #include <rte_ether.h>
  34 #include <rte_ethdev.h>
  35 #include <rte_ip.h>
  36 #include <rte_string_fns.h>
  37 #include <rte_flow.h>
  38
  39 #include "testpmd.h"
  40
  41 /*
  42  * Forwarding of packets in MAC mode.
  43  * Change the source and the destination Ethernet addressed of packets
  44  * before forwarding them.
  45  */
  46 static void
  47 pkt_burst_mac_forward(struct fwd_stream *fs)
  48 {
  49         struct rte_mbuf  *pkts_burst[MAX_PKT_BURST];
  50         struct rte_port  *txp;
  51         struct rte_mbuf  *mb;
  52         struct ether_hdr *eth_hdr;
  53         uint32_t retry;
  54         uint16_t nb_rx;
  55         uint16_t nb_tx;
  56         uint16_t i;
  57         uint64_t ol_flags = 0;
  58         uint64_t tx_offloads;
  59 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
  60         uint64_t start_tsc;
  61         uint64_t end_tsc;
  62         uint64_t core_cycles;
  63 #endif
  64
  65 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
  66         start_tsc = rte_rdtsc();
  67 #endif
  68
  69         /*
  70          * Receive a burst of packets and forward them.
  71          */
  72         nb_rx = rte_eth_rx_burst(fs->rx_port, fs->rx_queue, pkts_burst,
  73                                  nb_pkt_per_burst);
  74         if (unlikely(nb_rx == 0))
  75                 return;
  76
  77 #ifdef RTE_TEST_PMD_RECORD_BURST_STATS
  78         fs->rx_burst_stats.pkt_burst_spread[nb_rx]++;
  79 #endif
  80         fs->rx_packets += nb_rx;
  81         txp = &ports[fs->tx_port];
  82         tx_offloads = txp->dev_conf.txmode.offloads;
  83         if (tx_offloads & DEV_TX_OFFLOAD_VLAN_INSERT)
  84                 ol_flags = PKT_TX_VLAN_PKT;
  85         if (tx_offloads & DEV_TX_OFFLOAD_QINQ_INSERT)
  86                 ol_flags |= PKT_TX_QINQ_PKT;
  87         if (tx_offloads & DEV_TX_OFFLOAD_MACSEC_INSERT)
  88                 ol_flags |= PKT_TX_MACSEC;
  89         for (i = 0; i < nb_rx; i++) {
  90                 if (likely(i < nb_rx - 1))
  91                         rte_prefetch0(rte_pktmbuf_mtod(pkts_burst[i + 1],
  92                                                        void *));
  93                 mb = pkts_burst[i];
  94                 eth_hdr = rte_pktmbuf_mtod(mb, struct ether_hdr *);
  95                 ether_addr_copy(&peer_eth_addrs[fs->peer_addr],
  96                                 &eth_hdr->d_addr);
  97                 ether_addr_copy(&ports[fs->tx_port].eth_addr,
  98                                 &eth_hdr->s_addr);
  99                 mb->ol_flags &= IND_ATTACHED_MBUF | EXT_ATTACHED_MBUF;
 100                 mb->ol_flags |= ol_flags;
 101                 mb->l2_len = sizeof(struct ether_hdr);
 102                 mb->l3_len = sizeof(struct ipv4_hdr);
 103                 mb->vlan_tci = txp->tx_vlan_id;
 104                 mb->vlan_tci_outer = txp->tx_vlan_id_outer;
 105         }
 106         nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, pkts_burst, nb_rx);
 107         /*
 108          * Retry if necessary
 109          */
 110         if (unlikely(nb_tx < nb_rx) && fs->retry_enabled) {
 111                 retry = 0;
 112                 while (nb_tx < nb_rx && retry++ < burst_tx_retry_num) {
 113                         rte_delay_us(burst_tx_delay_time);
 114                         nb_tx += rte_eth_tx_burst(fs->tx_port, fs->tx_queue,
 115                                         &pkts_burst[nb_tx], nb_rx - nb_tx);
 116                 }
 117         }
 118
 119         fs->tx_packets += nb_tx;
 120 #ifdef RTE_TEST_PMD_RECORD_BURST_STATS
 121         fs->tx_burst_stats.pkt_burst_spread[nb_tx]++;
 122 #endif
 123         if (unlikely(nb_tx < nb_rx)) {
 124                 fs->fwd_dropped += (nb_rx - nb_tx);
 125                 do {
 126                         rte_pktmbuf_free(pkts_burst[nb_tx]);
 127                 } while (++nb_tx < nb_rx);
 128         }
 129 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
 130         end_tsc = rte_rdtsc();
 131         core_cycles = (end_tsc - start_tsc);
 132         fs->core_cycles = (uint64_t) (fs->core_cycles + core_cycles);
 133 #endif
 134 }
 135
 136 struct fwd_engine mac_fwd_engine = {
 137         .fwd_mode_name  = "mac",
 138         .port_fwd_begin = NULL,
 139         .port_fwd_end   = NULL,
 140         .packet_fwd     = pkt_burst_mac_forward,
 141 };