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 inc_rx_burst_stats(fs, nb_rx);
69 if (unlikely(nb_rx == 0))
72 fs->rx_packets += nb_rx;
73 txp = &ports[fs->tx_port];
74 tx_offloads = txp->dev_conf.txmode.offloads;
75 if (tx_offloads & DEV_TX_OFFLOAD_VLAN_INSERT)
76 ol_flags = PKT_TX_VLAN_PKT;
77 if (tx_offloads & DEV_TX_OFFLOAD_QINQ_INSERT)
78 ol_flags |= PKT_TX_QINQ_PKT;
79 if (tx_offloads & DEV_TX_OFFLOAD_MACSEC_INSERT)
80 ol_flags |= PKT_TX_MACSEC;
81 for (i = 0; i < nb_rx; i++) {
82 if (likely(i < nb_rx - 1))
83 rte_prefetch0(rte_pktmbuf_mtod(pkts_burst[i + 1],
86 eth_hdr = rte_pktmbuf_mtod(mb, struct rte_ether_hdr *);
87 rte_ether_addr_copy(&peer_eth_addrs[fs->peer_addr],
89 rte_ether_addr_copy(&ports[fs->tx_port].eth_addr,
91 mb->ol_flags &= IND_ATTACHED_MBUF | EXT_ATTACHED_MBUF;
92 mb->ol_flags |= ol_flags;
93 mb->l2_len = sizeof(struct rte_ether_hdr);
94 mb->l3_len = sizeof(struct rte_ipv4_hdr);
95 mb->vlan_tci = txp->tx_vlan_id;
96 mb->vlan_tci_outer = txp->tx_vlan_id_outer;
98 nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, pkts_burst, nb_rx);
102 if (unlikely(nb_tx < nb_rx) && fs->retry_enabled) {
104 while (nb_tx < nb_rx && retry++ < burst_tx_retry_num) {
105 rte_delay_us(burst_tx_delay_time);
106 nb_tx += rte_eth_tx_burst(fs->tx_port, fs->tx_queue,
107 &pkts_burst[nb_tx], nb_rx - nb_tx);
111 fs->tx_packets += nb_tx;
112 inc_tx_burst_stats(fs, nb_tx);
113 if (unlikely(nb_tx < nb_rx)) {
114 fs->fwd_dropped += (nb_rx - nb_tx);
116 rte_pktmbuf_free(pkts_burst[nb_tx]);
117 } while (++nb_tx < nb_rx);
120 get_end_cycles(fs, start_tsc);
123 struct fwd_engine mac_fwd_engine = {
124 .fwd_mode_name = "mac",
125 .port_fwd_begin = NULL,
126 .port_fwd_end = NULL,
127 .packet_fwd = pkt_burst_mac_forward,