ceph/src/seastar/dpdk/app/test-pmd/macswap.c

   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 #if defined(RTE_ARCH_X86)
  70 #include "macswap_sse.h"
  71 #elif defined(RTE_MACHINE_CPUFLAG_NEON)
  72 #include "macswap_neon.h"
  73 #else
  74 #include "macswap.h"
  75 #endif
  76
  77 /*
  78  * MAC swap forwarding mode: Swap the source and the destination Ethernet
  79  * addresses of packets before forwarding them.
  80  */
  81 static void
  82 pkt_burst_mac_swap(struct fwd_stream *fs)
  83 {
  84         struct rte_mbuf  *pkts_burst[MAX_PKT_BURST];
  85         struct rte_port  *txp;
  86         uint16_t nb_rx;
  87         uint16_t nb_tx;
  88         uint32_t retry;
  89 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
  90         uint64_t start_tsc;
  91         uint64_t end_tsc;
  92         uint64_t core_cycles;
  93 #endif
  94
  95 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
  96         start_tsc = rte_rdtsc();
  97 #endif
  98
  99         /*
 100          * Receive a burst of packets and forward them.
 101          */
 102         nb_rx = rte_eth_rx_burst(fs->rx_port, fs->rx_queue, pkts_burst,
 103                                  nb_pkt_per_burst);
 104         if (unlikely(nb_rx == 0))
 105                 return;
 106
 107 #ifdef RTE_TEST_PMD_RECORD_BURST_STATS
 108         fs->rx_burst_stats.pkt_burst_spread[nb_rx]++;
 109 #endif
 110         fs->rx_packets += nb_rx;
 111         txp = &ports[fs->tx_port];
 112
 113         do_macswap(pkts_burst, nb_rx, txp);
 114
 115         nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, pkts_burst, nb_rx);
 116         /*
 117          * Retry if necessary
 118          */
 119         if (unlikely(nb_tx < nb_rx) && fs->retry_enabled) {
 120                 retry = 0;
 121                 while (nb_tx < nb_rx && retry++ < burst_tx_retry_num) {
 122                         rte_delay_us(burst_tx_delay_time);
 123                         nb_tx += rte_eth_tx_burst(fs->tx_port, fs->tx_queue,
 124                                         &pkts_burst[nb_tx], nb_rx - nb_tx);
 125                 }
 126         }
 127         fs->tx_packets += nb_tx;
 128 #ifdef RTE_TEST_PMD_RECORD_BURST_STATS
 129         fs->tx_burst_stats.pkt_burst_spread[nb_tx]++;
 130 #endif
 131         if (unlikely(nb_tx < nb_rx)) {
 132                 fs->fwd_dropped += (nb_rx - nb_tx);
 133                 do {
 134                         rte_pktmbuf_free(pkts_burst[nb_tx]);
 135                 } while (++nb_tx < nb_rx);
 136         }
 137 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
 138         end_tsc = rte_rdtsc();
 139         core_cycles = (end_tsc - start_tsc);
 140         fs->core_cycles = (uint64_t) (fs->core_cycles + core_cycles);
 141 #endif
 142 }
 143
 144 struct fwd_engine mac_swap_engine = {
 145         .fwd_mode_name  = "macswap",
 146         .port_fwd_begin = NULL,
 147         .port_fwd_end   = NULL,
 148         .packet_fwd     = pkt_burst_mac_swap,
 149 };