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 static inline uint16_t
  57 ip_sum(const unaligned_uint16_t *hdr, int hdr_len)
  58 {
  59         uint32_t sum = 0;
  60
  61         while (hdr_len > 1)
  62         {
  63                 sum += *hdr++;
  64                 if (sum & 0x80000000)
  65                         sum = (sum & 0xFFFF) + (sum >> 16);
  66                 hdr_len -= 2;
  67         }
  68
  69         while (sum >> 16)
  70                 sum = (sum & 0xFFFF) + (sum >> 16);
  71
  72         return ~sum;
  73 }
  74
  75 /*
  76  * Multi-flow generation mode.
  77  *
  78  * We originate a bunch of flows (varying destination IP addresses), and
  79  * terminate receive traffic.  Received traffic is simply discarded, but we
  80  * still do so in order to maintain traffic statistics.
  81  */
  82 static void
  83 pkt_burst_flow_gen(struct fwd_stream *fs)
  84 {
  85         unsigned pkt_size = tx_pkt_length - 4;  /* Adjust FCS */
  86         struct rte_mbuf  *pkts_burst[MAX_PKT_BURST];
  87         struct rte_mempool *mbp;
  88         struct rte_mbuf  *pkt;
  89         struct rte_ether_hdr *eth_hdr;
  90         struct rte_ipv4_hdr *ip_hdr;
  91         struct rte_udp_hdr *udp_hdr;
  92         uint16_t vlan_tci, vlan_tci_outer;
  93         uint64_t ol_flags = 0;
  94         uint16_t nb_rx;
  95         uint16_t nb_tx;
  96         uint16_t nb_pkt;
  97         uint16_t i;
  98         uint32_t retry;
  99         uint64_t tx_offloads;
 100 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
 101         uint64_t start_tsc;
 102         uint64_t end_tsc;
 103         uint64_t core_cycles;
 104 #endif
 105         static int next_flow = 0;
 106
 107 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
 108         start_tsc = rte_rdtsc();
 109 #endif
 110
 111         /* Receive a burst of packets and discard them. */
 112         nb_rx = rte_eth_rx_burst(fs->rx_port, fs->rx_queue, pkts_burst,
 113                                  nb_pkt_per_burst);
 114         fs->rx_packets += nb_rx;
 115
 116         for (i = 0; i < nb_rx; i++)
 117                 rte_pktmbuf_free(pkts_burst[i]);
 118
 119         mbp = current_fwd_lcore()->mbp;
 120         vlan_tci = ports[fs->tx_port].tx_vlan_id;
 121         vlan_tci_outer = ports[fs->tx_port].tx_vlan_id_outer;
 122
 123         tx_offloads = ports[fs->tx_port].dev_conf.txmode.offloads;
 124         if (tx_offloads & DEV_TX_OFFLOAD_VLAN_INSERT)
 125                 ol_flags |= PKT_TX_VLAN_PKT;
 126         if (tx_offloads & DEV_TX_OFFLOAD_QINQ_INSERT)
 127                 ol_flags |= PKT_TX_QINQ_PKT;
 128         if (tx_offloads & DEV_TX_OFFLOAD_MACSEC_INSERT)
 129                 ol_flags |= PKT_TX_MACSEC;
 130
 131         for (nb_pkt = 0; nb_pkt < nb_pkt_per_burst; nb_pkt++) {
 132                 pkt = rte_mbuf_raw_alloc(mbp);
 133                 if (!pkt)
 134                         break;
 135
 136                 pkt->data_len = pkt_size;
 137                 pkt->next = NULL;
 138
 139                 /* Initialize Ethernet header. */
 140                 eth_hdr = rte_pktmbuf_mtod(pkt, struct rte_ether_hdr *);
 141                 rte_ether_addr_copy(&cfg_ether_dst, &eth_hdr->d_addr);
 142                 rte_ether_addr_copy(&cfg_ether_src, &eth_hdr->s_addr);
 143                 eth_hdr->ether_type = rte_cpu_to_be_16(RTE_ETHER_TYPE_IPV4);
 144
 145                 /* Initialize IP header. */
 146                 ip_hdr = (struct rte_ipv4_hdr *)(eth_hdr + 1);
 147                 memset(ip_hdr, 0, sizeof(*ip_hdr));
 148                 ip_hdr->version_ihl     = RTE_IPV4_VHL_DEF;
 149                 ip_hdr->type_of_service = 0;
 150                 ip_hdr->fragment_offset = 0;
 151                 ip_hdr->time_to_live    = IP_DEFTTL;
 152                 ip_hdr->next_proto_id   = IPPROTO_UDP;
 153                 ip_hdr->packet_id       = 0;
 154                 ip_hdr->src_addr        = rte_cpu_to_be_32(cfg_ip_src);
 155                 ip_hdr->dst_addr        = rte_cpu_to_be_32(cfg_ip_dst +
 156                                                            next_flow);
 157                 ip_hdr->total_length    = RTE_CPU_TO_BE_16(pkt_size -
 158                                                            sizeof(*eth_hdr));
 159                 ip_hdr->hdr_checksum    = ip_sum((unaligned_uint16_t *)ip_hdr,
 160                                                  sizeof(*ip_hdr));
 161
 162                 /* Initialize UDP header. */
 163                 udp_hdr = (struct rte_udp_hdr *)(ip_hdr + 1);
 164                 udp_hdr->src_port       = rte_cpu_to_be_16(cfg_udp_src);
 165                 udp_hdr->dst_port       = rte_cpu_to_be_16(cfg_udp_dst);
 166                 udp_hdr->dgram_cksum    = 0; /* No UDP checksum. */
 167                 udp_hdr->dgram_len      = RTE_CPU_TO_BE_16(pkt_size -
 168                                                            sizeof(*eth_hdr) -
 169                                                            sizeof(*ip_hdr));
 170                 pkt->nb_segs            = 1;
 171                 pkt->pkt_len            = pkt_size;
 172                 pkt->ol_flags           &= EXT_ATTACHED_MBUF;
 173                 pkt->ol_flags           |= ol_flags;
 174                 pkt->vlan_tci           = vlan_tci;
 175                 pkt->vlan_tci_outer     = vlan_tci_outer;
 176                 pkt->l2_len             = sizeof(struct rte_ether_hdr);
 177                 pkt->l3_len             = sizeof(struct rte_ipv4_hdr);
 178                 pkts_burst[nb_pkt]      = pkt;
 179
 180                 next_flow = (next_flow + 1) % cfg_n_flows;
 181         }
 182
 183         nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, pkts_burst, nb_pkt);
 184         /*
 185          * Retry if necessary
 186          */
 187         if (unlikely(nb_tx < nb_rx) && fs->retry_enabled) {
 188                 retry = 0;
 189                 while (nb_tx < nb_rx && retry++ < burst_tx_retry_num) {
 190                         rte_delay_us(burst_tx_delay_time);
 191                         nb_tx += rte_eth_tx_burst(fs->tx_port, fs->tx_queue,
 192                                         &pkts_burst[nb_tx], nb_rx - nb_tx);
 193                 }
 194         }
 195         fs->tx_packets += nb_tx;
 196
 197 #ifdef RTE_TEST_PMD_RECORD_BURST_STATS
 198         fs->tx_burst_stats.pkt_burst_spread[nb_tx]++;
 199 #endif
 200         if (unlikely(nb_tx < nb_pkt)) {
 201                 /* Back out the flow counter. */
 202                 next_flow -= (nb_pkt - nb_tx);
 203                 while (next_flow < 0)
 204                         next_flow += cfg_n_flows;
 205
 206                 do {
 207                         rte_pktmbuf_free(pkts_burst[nb_tx]);
 208                 } while (++nb_tx < nb_pkt);
 209         }
 210 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
 211         end_tsc = rte_rdtsc();
 212         core_cycles = (end_tsc - start_tsc);
 213         fs->core_cycles = (uint64_t) (fs->core_cycles + core_cycles);
 214 #endif
 215 }
 216
 217 struct fwd_engine flow_gen_engine = {
 218         .fwd_mode_name  = "flowgen",
 219         .port_fwd_begin = NULL,
 220         .port_fwd_end   = NULL,
 221         .packet_fwd     = pkt_burst_flow_gen,
 222 };