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/*-
* BSD LICENSE
*
* Copyright(c) 2014 Tilera Corporation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Tilera Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <stdarg.h>
#include <string.h>
#include <stdio.h>
#include <errno.h>
#include <stdint.h>
#include <unistd.h>
#include <inttypes.h>
#include <sys/queue.h>
#include <sys/stat.h>
#include <rte_common.h>
#include <rte_byteorder.h>
#include <rte_log.h>
#include <rte_debug.h>
#include <rte_cycles.h>
#include <rte_memory.h>
#include <rte_memcpy.h>
#include <rte_launch.h>
#include <rte_eal.h>
#include <rte_per_lcore.h>
#include <rte_lcore.h>
#include <rte_atomic.h>
#include <rte_branch_prediction.h>
#include <rte_mempool.h>
#include <rte_mbuf.h>
#include <rte_interrupts.h>
#include <rte_pci.h>
#include <rte_ether.h>
#include <rte_ethdev.h>
#include <rte_ip.h>
#include <rte_string_fns.h>
#include <rte_flow.h>
#include "testpmd.h"
/*
* MAC swap forwarding mode: Swap the source and the destination Ethernet
* addresses of packets before forwarding them.
*/
static void
pkt_burst_mac_swap(struct fwd_stream *fs)
{
struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
struct rte_port *txp;
struct rte_mbuf *mb;
struct ether_hdr *eth_hdr;
struct ether_addr addr;
uint16_t nb_rx;
uint16_t nb_tx;
uint16_t i;
uint32_t retry;
uint64_t ol_flags = 0;
uint64_t tx_offloads;
#ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
uint64_t start_tsc;
uint64_t end_tsc;
uint64_t core_cycles;
#endif
#ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
start_tsc = rte_rdtsc();
#endif
/*
* Receive a burst of packets and forward them.
*/
nb_rx = rte_eth_rx_burst(fs->rx_port, fs->rx_queue, pkts_burst,
nb_pkt_per_burst);
if (unlikely(nb_rx == 0))
return;
#ifdef RTE_TEST_PMD_RECORD_BURST_STATS
fs->rx_burst_stats.pkt_burst_spread[nb_rx]++;
#endif
fs->rx_packets += nb_rx;
txp = &ports[fs->tx_port];
tx_offloads = txp->dev_conf.txmode.offloads;
if (tx_offloads & DEV_TX_OFFLOAD_VLAN_INSERT)
ol_flags = PKT_TX_VLAN_PKT;
if (tx_offloads & DEV_TX_OFFLOAD_QINQ_INSERT)
ol_flags |= PKT_TX_QINQ_PKT;
if (tx_offloads & DEV_TX_OFFLOAD_MACSEC_INSERT)
ol_flags |= PKT_TX_MACSEC;
for (i = 0; i < nb_rx; i++) {
if (likely(i < nb_rx - 1))
rte_prefetch0(rte_pktmbuf_mtod(pkts_burst[i + 1],
void *));
mb = pkts_burst[i];
eth_hdr = rte_pktmbuf_mtod(mb, struct ether_hdr *);
/* Swap dest and src mac addresses. */
ether_addr_copy(ð_hdr->d_addr, &addr);
ether_addr_copy(ð_hdr->s_addr, ð_hdr->d_addr);
ether_addr_copy(&addr, ð_hdr->s_addr);
mb->ol_flags &= IND_ATTACHED_MBUF | EXT_ATTACHED_MBUF;
mb->ol_flags |= ol_flags;
mb->l2_len = sizeof(struct ether_hdr);
mb->l3_len = sizeof(struct ipv4_hdr);
mb->vlan_tci = txp->tx_vlan_id;
mb->vlan_tci_outer = txp->tx_vlan_id_outer;
}
nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, pkts_burst, nb_rx);
/*
* Retry if necessary
*/
if (unlikely(nb_tx < nb_rx) && fs->retry_enabled) {
retry = 0;
while (nb_tx < nb_rx && retry++ < burst_tx_retry_num) {
rte_delay_us(burst_tx_delay_time);
nb_tx += rte_eth_tx_burst(fs->tx_port, fs->tx_queue,
&pkts_burst[nb_tx], nb_rx - nb_tx);
}
}
fs->tx_packets += nb_tx;
#ifdef RTE_TEST_PMD_RECORD_BURST_STATS
fs->tx_burst_stats.pkt_burst_spread[nb_tx]++;
#endif
if (unlikely(nb_tx < nb_rx)) {
fs->fwd_dropped += (nb_rx - nb_tx);
do {
rte_pktmbuf_free(pkts_burst[nb_tx]);
} while (++nb_tx < nb_rx);
}
#ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
end_tsc = rte_rdtsc();
core_cycles = (end_tsc - start_tsc);
fs->core_cycles = (uint64_t) (fs->core_cycles + core_cycles);
#endif
}
struct fwd_engine mac_swap_engine = {
.fwd_mode_name = "macswap",
.port_fwd_begin = NULL,
.port_fwd_end = NULL,
.packet_fwd = pkt_burst_mac_swap,
};
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