1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2010-2014 Intel Corporation
13 #include <sys/queue.h>
16 #include <rte_common.h>
17 #include <rte_byteorder.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>
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>
31 #include <rte_interrupts.h>
33 #include <rte_ether.h>
34 #include <rte_ethdev.h>
36 #include <rte_string_fns.h>
42 * Forwarding of packets in MAC mode.
43 * Change the source and the destination Ethernet addressed of packets
44 * before forwarding them.
47 pkt_burst_mac_forward(struct fwd_stream *fs)
49 struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
52 struct rte_ether_hdr *eth_hdr;
57 uint64_t ol_flags = 0;
59 uint64_t start_tsc = 0;
61 get_start_cycles(&start_tsc);
64 * Receive a burst of packets and forward them.
66 nb_rx = rte_eth_rx_burst(fs->rx_port, fs->rx_queue, pkts_burst,
68 #ifdef RTE_TEST_PMD_RECORD_BURST_STATS
69 fs->rx_burst_stats.pkt_burst_spread[nb_rx]++;
71 if (unlikely(nb_rx == 0))
74 fs->rx_packets += nb_rx;
75 txp = &ports[fs->tx_port];
76 tx_offloads = txp->dev_conf.txmode.offloads;
77 if (tx_offloads & DEV_TX_OFFLOAD_VLAN_INSERT)
78 ol_flags = PKT_TX_VLAN_PKT;
79 if (tx_offloads & DEV_TX_OFFLOAD_QINQ_INSERT)
80 ol_flags |= PKT_TX_QINQ_PKT;
81 if (tx_offloads & DEV_TX_OFFLOAD_MACSEC_INSERT)
82 ol_flags |= PKT_TX_MACSEC;
83 for (i = 0; i < nb_rx; i++) {
84 if (likely(i < nb_rx - 1))
85 rte_prefetch0(rte_pktmbuf_mtod(pkts_burst[i + 1],
88 eth_hdr = rte_pktmbuf_mtod(mb, struct rte_ether_hdr *);
89 rte_ether_addr_copy(&peer_eth_addrs[fs->peer_addr],
91 rte_ether_addr_copy(&ports[fs->tx_port].eth_addr,
93 mb->ol_flags &= IND_ATTACHED_MBUF | EXT_ATTACHED_MBUF;
94 mb->ol_flags |= ol_flags;
95 mb->l2_len = sizeof(struct rte_ether_hdr);
96 mb->l3_len = sizeof(struct rte_ipv4_hdr);
97 mb->vlan_tci = txp->tx_vlan_id;
98 mb->vlan_tci_outer = txp->tx_vlan_id_outer;
100 nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, pkts_burst, nb_rx);
104 if (unlikely(nb_tx < nb_rx) && fs->retry_enabled) {
106 while (nb_tx < nb_rx && retry++ < burst_tx_retry_num) {
107 rte_delay_us(burst_tx_delay_time);
108 nb_tx += rte_eth_tx_burst(fs->tx_port, fs->tx_queue,
109 &pkts_burst[nb_tx], nb_rx - nb_tx);
113 fs->tx_packets += nb_tx;
114 #ifdef RTE_TEST_PMD_RECORD_BURST_STATS
115 fs->tx_burst_stats.pkt_burst_spread[nb_tx]++;
117 if (unlikely(nb_tx < nb_rx)) {
118 fs->fwd_dropped += (nb_rx - nb_tx);
120 rte_pktmbuf_free(pkts_burst[nb_tx]);
121 } while (++nb_tx < nb_rx);
124 get_end_cycles(fs, start_tsc);
127 struct fwd_engine mac_fwd_engine = {
128 .fwd_mode_name = "mac",
129 .port_fwd_begin = NULL,
130 .port_fwd_end = NULL,
131 .packet_fwd = pkt_burst_mac_forward,