1 /*- 2 * BSD LICENSE 3 * 4 * Copyright(c) 2014 Tilera Corporation. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * * Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * * Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in 14 * the documentation and/or other materials provided with the 15 * distribution. 16 * * Neither the name of Tilera Corporation nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 23 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 24 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 25 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 26 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 30 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 * 32 */ 33 34 #include <stdarg.h> 35 #include <string.h> 36 #include <stdio.h> 37 #include <errno.h> 38 #include <stdint.h> 39 #include <unistd.h> 40 #include <inttypes.h> 41 42 #include <sys/queue.h> 43 #include <sys/stat.h> 44 45 #include <rte_common.h> 46 #include <rte_byteorder.h> 47 #include <rte_log.h> 48 #include <rte_debug.h> 49 #include <rte_cycles.h> 50 #include <rte_memory.h> 51 #include <rte_memcpy.h> 52 #include <rte_launch.h> 53 #include <rte_eal.h> 54 #include <rte_per_lcore.h> 55 #include <rte_lcore.h> 56 #include <rte_atomic.h> 57 #include <rte_branch_prediction.h> 58 #include <rte_mempool.h> 59 #include <rte_mbuf.h> 60 #include <rte_interrupts.h> 61 #include <rte_pci.h> 62 #include <rte_ether.h> 63 #include <rte_ethdev.h> 64 #include <rte_ip.h> 65 #include <rte_string_fns.h> 66 #include <rte_flow.h> 67 68 #include "testpmd.h" 69 70 /* 71 * MAC swap forwarding mode: Swap the source and the destination Ethernet 72 * addresses of packets before forwarding them. 73 */ 74 static void 75 pkt_burst_mac_swap(struct fwd_stream *fs) 76 { 77 struct rte_mbuf *pkts_burst[MAX_PKT_BURST]; 78 struct rte_port *txp; 79 struct rte_mbuf *mb; 80 struct ether_hdr *eth_hdr; 81 struct ether_addr addr; 82 uint16_t nb_rx; 83 uint16_t nb_tx; 84 uint16_t i; 85 uint32_t retry; 86 uint64_t ol_flags = 0; 87 uint64_t tx_offloads; 88 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES 89 uint64_t start_tsc; 90 uint64_t end_tsc; 91 uint64_t core_cycles; 92 #endif 93 94 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES 95 start_tsc = rte_rdtsc(); 96 #endif 97 98 /* 99 * Receive a burst of packets and forward them. 100 */ 101 nb_rx = rte_eth_rx_burst(fs->rx_port, fs->rx_queue, pkts_burst, 102 nb_pkt_per_burst); 103 if (unlikely(nb_rx == 0)) 104 return; 105 106 #ifdef RTE_TEST_PMD_RECORD_BURST_STATS 107 fs->rx_burst_stats.pkt_burst_spread[nb_rx]++; 108 #endif 109 fs->rx_packets += nb_rx; 110 txp = &ports[fs->tx_port]; 111 tx_offloads = txp->dev_conf.txmode.offloads; 112 if (tx_offloads & DEV_TX_OFFLOAD_VLAN_INSERT) 113 ol_flags = PKT_TX_VLAN_PKT; 114 if (tx_offloads & DEV_TX_OFFLOAD_QINQ_INSERT) 115 ol_flags |= PKT_TX_QINQ_PKT; 116 if (tx_offloads & DEV_TX_OFFLOAD_MACSEC_INSERT) 117 ol_flags |= PKT_TX_MACSEC; 118 for (i = 0; i < nb_rx; i++) { 119 if (likely(i < nb_rx - 1)) 120 rte_prefetch0(rte_pktmbuf_mtod(pkts_burst[i + 1], 121 void *)); 122 mb = pkts_burst[i]; 123 eth_hdr = rte_pktmbuf_mtod(mb, struct ether_hdr *); 124 125 /* Swap dest and src mac addresses. */ 126 ether_addr_copy(ð_hdr->d_addr, &addr); 127 ether_addr_copy(ð_hdr->s_addr, ð_hdr->d_addr); 128 ether_addr_copy(&addr, ð_hdr->s_addr); 129 130 mb->ol_flags = ol_flags; 131 mb->l2_len = sizeof(struct ether_hdr); 132 mb->l3_len = sizeof(struct ipv4_hdr); 133 mb->vlan_tci = txp->tx_vlan_id; 134 mb->vlan_tci_outer = txp->tx_vlan_id_outer; 135 } 136 nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, pkts_burst, nb_rx); 137 /* 138 * Retry if necessary 139 */ 140 if (unlikely(nb_tx < nb_rx) && fs->retry_enabled) { 141 retry = 0; 142 while (nb_tx < nb_rx && retry++ < burst_tx_retry_num) { 143 rte_delay_us(burst_tx_delay_time); 144 nb_tx += rte_eth_tx_burst(fs->tx_port, fs->tx_queue, 145 &pkts_burst[nb_tx], nb_rx - nb_tx); 146 } 147 } 148 fs->tx_packets += nb_tx; 149 #ifdef RTE_TEST_PMD_RECORD_BURST_STATS 150 fs->tx_burst_stats.pkt_burst_spread[nb_tx]++; 151 #endif 152 if (unlikely(nb_tx < nb_rx)) { 153 fs->fwd_dropped += (nb_rx - nb_tx); 154 do { 155 rte_pktmbuf_free(pkts_burst[nb_tx]); 156 } while (++nb_tx < nb_rx); 157 } 158 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES 159 end_tsc = rte_rdtsc(); 160 core_cycles = (end_tsc - start_tsc); 161 fs->core_cycles = (uint64_t) (fs->core_cycles + core_cycles); 162 #endif 163 } 164 165 struct fwd_engine mac_swap_engine = { 166 .fwd_mode_name = "macswap", 167 .port_fwd_begin = NULL, 168 .port_fwd_end = NULL, 169 .packet_fwd = pkt_burst_mac_swap, 170 }; 171