app/test-pmd/flowgen.c

   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_atomic.h>
  28 #include <rte_branch_prediction.h>
  29 #include <rte_mempool.h>
  30 #include <rte_mbuf.h>
  31 #include <rte_interrupts.h>
  32 #include <rte_pci.h>
  33 #include <rte_ether.h>
  34 #include <rte_ethdev.h>
  35 #include <rte_ip.h>
  36 #include <rte_tcp.h>
  37 #include <rte_udp.h>
  38 #include <rte_string_fns.h>
  39 #include <rte_flow.h>
  40
  41 #include "testpmd.h"
  42
  43 /* hardcoded configuration (for now) */
  44 static unsigned cfg_n_flows     = 1024;
  45 static uint32_t cfg_ip_src      = RTE_IPV4(10, 254, 0, 0);
  46 static uint32_t cfg_ip_dst      = RTE_IPV4(10, 253, 0, 0);
  47 static uint16_t cfg_udp_src     = 1000;
  48 static uint16_t cfg_udp_dst     = 1001;
  49 static struct rte_ether_addr cfg_ether_src =
  50         {{ 0x00, 0x01, 0x02, 0x03, 0x04, 0x00 }};
  51 static struct rte_ether_addr cfg_ether_dst =
  52         {{ 0x00, 0x01, 0x02, 0x03, 0x04, 0x01 }};
  53
  54 #define IP_DEFTTL  64   /* from RFC 1340. */
  55
  56 RTE_DEFINE_PER_LCORE(int, _next_flow);
  57
  58 /*
  59  * Multi-flow generation mode.
  60  *
  61  * We originate a bunch of flows (varying destination IP addresses), and
  62  * terminate receive traffic.  Received traffic is simply discarded, but we
  63  * still do so in order to maintain traffic statistics.
  64  */
  65 static void
  66 pkt_burst_flow_gen(struct fwd_stream *fs)
  67 {
  68         unsigned pkt_size = tx_pkt_length - 4;  /* Adjust FCS */
  69         struct rte_mbuf  *pkts_burst[MAX_PKT_BURST];
  70         struct rte_mempool *mbp;
  71         struct rte_mbuf  *pkt = NULL;
  72         struct rte_ether_hdr *eth_hdr;
  73         struct rte_ipv4_hdr *ip_hdr;
  74         struct rte_udp_hdr *udp_hdr;
  75         uint16_t vlan_tci, vlan_tci_outer;
  76         uint64_t ol_flags = 0;
  77         uint16_t nb_rx;
  78         uint16_t nb_tx;
  79         uint16_t nb_pkt;
  80         uint16_t nb_clones = nb_pkt_flowgen_clones;
  81         uint16_t i;
  82         uint32_t retry;
  83         uint64_t tx_offloads;
  84         uint64_t start_tsc = 0;
  85         int next_flow = RTE_PER_LCORE(_next_flow);
  86
  87         get_start_cycles(&start_tsc);
  88
  89         /* Receive a burst of packets and discard them. */
  90         nb_rx = rte_eth_rx_burst(fs->rx_port, fs->rx_queue, pkts_burst,
  91                                  nb_pkt_per_burst);
  92         inc_rx_burst_stats(fs, nb_rx);
  93         fs->rx_packets += nb_rx;
  94
  95         for (i = 0; i < nb_rx; i++)
  96                 rte_pktmbuf_free(pkts_burst[i]);
  97
  98         mbp = current_fwd_lcore()->mbp;
  99         vlan_tci = ports[fs->tx_port].tx_vlan_id;
 100         vlan_tci_outer = ports[fs->tx_port].tx_vlan_id_outer;
 101
 102         tx_offloads = ports[fs->tx_port].dev_conf.txmode.offloads;
 103         if (tx_offloads & DEV_TX_OFFLOAD_VLAN_INSERT)
 104                 ol_flags |= PKT_TX_VLAN_PKT;
 105         if (tx_offloads & DEV_TX_OFFLOAD_QINQ_INSERT)
 106                 ol_flags |= PKT_TX_QINQ_PKT;
 107         if (tx_offloads & DEV_TX_OFFLOAD_MACSEC_INSERT)
 108                 ol_flags |= PKT_TX_MACSEC;
 109
 110         for (nb_pkt = 0; nb_pkt < nb_pkt_per_burst; nb_pkt++) {
 111                 if (!nb_pkt || !nb_clones) {
 112                         nb_clones = nb_pkt_flowgen_clones;
 113                         /* Logic limitation */
 114                         if (nb_clones > nb_pkt_per_burst)
 115                                 nb_clones = nb_pkt_per_burst;
 116
 117                         pkt = rte_mbuf_raw_alloc(mbp);
 118                         if (!pkt)
 119                                 break;
 120
 121                         pkt->data_len = pkt_size;
 122                         pkt->next = NULL;
 123
 124                         /* Initialize Ethernet header. */
 125                         eth_hdr = rte_pktmbuf_mtod(pkt, struct rte_ether_hdr *);
 126                         rte_ether_addr_copy(&cfg_ether_dst, &eth_hdr->d_addr);
 127                         rte_ether_addr_copy(&cfg_ether_src, &eth_hdr->s_addr);
 128                         eth_hdr->ether_type = rte_cpu_to_be_16(RTE_ETHER_TYPE_IPV4);
 129
 130                         /* Initialize IP header. */
 131                         ip_hdr = (struct rte_ipv4_hdr *)(eth_hdr + 1);
 132                         memset(ip_hdr, 0, sizeof(*ip_hdr));
 133                         ip_hdr->version_ihl     = RTE_IPV4_VHL_DEF;
 134                         ip_hdr->type_of_service = 0;
 135                         ip_hdr->fragment_offset = 0;
 136                         ip_hdr->time_to_live    = IP_DEFTTL;
 137                         ip_hdr->next_proto_id   = IPPROTO_UDP;
 138                         ip_hdr->packet_id       = 0;
 139                         ip_hdr->src_addr        = rte_cpu_to_be_32(cfg_ip_src);
 140                         ip_hdr->dst_addr        = rte_cpu_to_be_32(cfg_ip_dst +
 141                                                                    next_flow);
 142                         ip_hdr->total_length    = RTE_CPU_TO_BE_16(pkt_size -
 143                                                                    sizeof(*eth_hdr));
 144                         ip_hdr->hdr_checksum    = rte_ipv4_cksum(ip_hdr);
 145
 146                         /* Initialize UDP header. */
 147                         udp_hdr = (struct rte_udp_hdr *)(ip_hdr + 1);
 148                         udp_hdr->src_port       = rte_cpu_to_be_16(cfg_udp_src);
 149                         udp_hdr->dst_port       = rte_cpu_to_be_16(cfg_udp_dst);
 150                         udp_hdr->dgram_cksum    = 0; /* No UDP checksum. */
 151                         udp_hdr->dgram_len      = RTE_CPU_TO_BE_16(pkt_size -
 152                                                                    sizeof(*eth_hdr) -
 153                                                                    sizeof(*ip_hdr));
 154                         pkt->nb_segs            = 1;
 155                         pkt->pkt_len            = pkt_size;
 156                         pkt->ol_flags           &= EXT_ATTACHED_MBUF;
 157                         pkt->ol_flags           |= ol_flags;
 158                         pkt->vlan_tci           = vlan_tci;
 159                         pkt->vlan_tci_outer     = vlan_tci_outer;
 160                         pkt->l2_len             = sizeof(struct rte_ether_hdr);
 161                         pkt->l3_len             = sizeof(struct rte_ipv4_hdr);
 162                 } else {
 163                         nb_clones--;
 164                         rte_mbuf_refcnt_update(pkt, 1);
 165                 }
 166                 pkts_burst[nb_pkt] = pkt;
 167
 168                 if (++next_flow >= (int)cfg_n_flows)
 169                         next_flow = 0;
 170         }
 171
 172         nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, pkts_burst, nb_pkt);
 173         /*
 174          * Retry if necessary
 175          */
 176         if (unlikely(nb_tx < nb_pkt) && fs->retry_enabled) {
 177                 retry = 0;
 178                 while (nb_tx < nb_pkt && retry++ < burst_tx_retry_num) {
 179                         rte_delay_us(burst_tx_delay_time);
 180                         nb_tx += rte_eth_tx_burst(fs->tx_port, fs->tx_queue,
 181                                         &pkts_burst[nb_tx], nb_pkt - nb_tx);
 182                 }
 183         }
 184         fs->tx_packets += nb_tx;
 185
 186         inc_tx_burst_stats(fs, nb_tx);
 187         if (unlikely(nb_tx < nb_pkt)) {
 188                 /* Back out the flow counter. */
 189                 next_flow -= (nb_pkt - nb_tx);
 190                 while (next_flow < 0)
 191                         next_flow += cfg_n_flows;
 192
 193                 fs->fwd_dropped += nb_pkt - nb_tx;
 194                 do {
 195                         rte_pktmbuf_free(pkts_burst[nb_tx]);
 196                 } while (++nb_tx < nb_pkt);
 197         }
 198
 199         RTE_PER_LCORE(_next_flow) = next_flow;
 200
 201         get_end_cycles(fs, start_tsc);
 202 }
 203
 204 struct fwd_engine flow_gen_engine = {
 205         .fwd_mode_name  = "flowgen",
 206         .port_fwd_begin = NULL,
 207         .port_fwd_end   = NULL,
 208         .packet_fwd     = pkt_burst_flow_gen,
 209 };