1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright 2014-2020 Mellanox Technologies, Ltd
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_branch_prediction.h>
28 #include <rte_mempool.h>
29 #include <rte_mbuf.h>
30 #include <rte_interrupts.h>
31 #include <rte_pci.h>
32 #include <rte_ether.h>
33 #include <rte_ethdev.h>
34 #include <rte_ip.h>
35 #include <rte_string_fns.h>
36 #include <rte_flow.h>
37
38 #include "testpmd.h"
39 #if defined(RTE_ARCH_X86)
40 #include "macswap_sse.h"
41 #elif defined(__ARM_NEON)
42 #include "macswap_neon.h"
43 #else
44 #include "macswap.h"
45 #endif
46
47 /*
48 * MAC swap forwarding mode: Swap the source and the destination Ethernet
49 * addresses of packets before forwarding them.
50 */
51 static void
pkt_burst_mac_swap(struct fwd_stream * fs)52 pkt_burst_mac_swap(struct fwd_stream *fs)
53 {
54 struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
55 struct rte_port *txp;
56 uint16_t nb_rx;
57 uint16_t nb_tx;
58 uint32_t retry;
59 uint64_t start_tsc = 0;
60
61 get_start_cycles(&start_tsc);
62
63 /*
64 * Receive a burst of packets and forward them.
65 */
66 nb_rx = rte_eth_rx_burst(fs->rx_port, fs->rx_queue, pkts_burst,
67 nb_pkt_per_burst);
68 inc_rx_burst_stats(fs, nb_rx);
69 if (unlikely(nb_rx == 0))
70 return;
71
72 fs->rx_packets += nb_rx;
73 txp = &ports[fs->tx_port];
74
75 do_macswap(pkts_burst, nb_rx, txp);
76
77 nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, pkts_burst, nb_rx);
78 /*
79 * Retry if necessary
80 */
81 if (unlikely(nb_tx < nb_rx) && fs->retry_enabled) {
82 retry = 0;
83 while (nb_tx < nb_rx && retry++ < burst_tx_retry_num) {
84 rte_delay_us(burst_tx_delay_time);
85 nb_tx += rte_eth_tx_burst(fs->tx_port, fs->tx_queue,
86 &pkts_burst[nb_tx], nb_rx - nb_tx);
87 }
88 }
89 fs->tx_packets += nb_tx;
90 inc_tx_burst_stats(fs, nb_tx);
91 if (unlikely(nb_tx < nb_rx)) {
92 fs->fwd_dropped += (nb_rx - nb_tx);
93 do {
94 rte_pktmbuf_free(pkts_burst[nb_tx]);
95 } while (++nb_tx < nb_rx);
96 }
97 get_end_cycles(fs, start_tsc);
98 }
99
100 struct fwd_engine mac_swap_engine = {
101 .fwd_mode_name = "macswap",
102 .port_fwd_begin = NULL,
103 .port_fwd_end = NULL,
104 .packet_fwd = pkt_burst_mac_swap,
105 };
106