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_tcp.h> 36 #include <rte_udp.h> 37 #include <rte_string_fns.h> 38 #include <rte_flow.h> 39 40 #include "testpmd.h" 41 42 static uint32_t cfg_ip_src = RTE_IPV4(10, 254, 0, 0); 43 static uint32_t cfg_ip_dst = RTE_IPV4(10, 253, 0, 0); 44 static uint16_t cfg_udp_src = 1000; 45 static uint16_t cfg_udp_dst = 1001; 46 static struct rte_ether_addr cfg_ether_src = 47 {{ 0x00, 0x01, 0x02, 0x03, 0x04, 0x00 }}; 48 static struct rte_ether_addr cfg_ether_dst = 49 {{ 0x00, 0x01, 0x02, 0x03, 0x04, 0x01 }}; 50 51 #define IP_DEFTTL 64 /* from RFC 1340. */ 52 53 RTE_DEFINE_PER_LCORE(int, _next_flow); 54 55 /* 56 * Multi-flow generation mode. 57 * 58 * We originate a bunch of flows (varying destination IP addresses), and 59 * terminate receive traffic. Received traffic is simply discarded, but we 60 * still do so in order to maintain traffic statistics. 61 */ 62 static void 63 pkt_burst_flow_gen(struct fwd_stream *fs) 64 { 65 unsigned pkt_size = tx_pkt_length - 4; /* Adjust FCS */ 66 struct rte_mbuf *pkts_burst[MAX_PKT_BURST]; 67 struct rte_mempool *mbp; 68 struct rte_mbuf *pkt = NULL; 69 struct rte_ether_hdr *eth_hdr; 70 struct rte_ipv4_hdr *ip_hdr; 71 struct rte_udp_hdr *udp_hdr; 72 uint16_t vlan_tci, vlan_tci_outer; 73 uint64_t ol_flags = 0; 74 uint16_t nb_rx; 75 uint16_t nb_tx; 76 uint16_t nb_dropped; 77 uint16_t nb_pkt; 78 uint16_t nb_clones = nb_pkt_flowgen_clones; 79 uint16_t i; 80 uint32_t retry; 81 uint64_t tx_offloads; 82 uint64_t start_tsc = 0; 83 int next_flow = RTE_PER_LCORE(_next_flow); 84 85 get_start_cycles(&start_tsc); 86 87 /* Receive a burst of packets and discard them. */ 88 nb_rx = rte_eth_rx_burst(fs->rx_port, fs->rx_queue, pkts_burst, 89 nb_pkt_per_burst); 90 inc_rx_burst_stats(fs, nb_rx); 91 fs->rx_packets += nb_rx; 92 93 for (i = 0; i < nb_rx; i++) 94 rte_pktmbuf_free(pkts_burst[i]); 95 96 mbp = current_fwd_lcore()->mbp; 97 vlan_tci = ports[fs->tx_port].tx_vlan_id; 98 vlan_tci_outer = ports[fs->tx_port].tx_vlan_id_outer; 99 100 tx_offloads = ports[fs->tx_port].dev_conf.txmode.offloads; 101 if (tx_offloads & RTE_ETH_TX_OFFLOAD_VLAN_INSERT) 102 ol_flags |= RTE_MBUF_F_TX_VLAN; 103 if (tx_offloads & RTE_ETH_TX_OFFLOAD_QINQ_INSERT) 104 ol_flags |= RTE_MBUF_F_TX_QINQ; 105 if (tx_offloads & RTE_ETH_TX_OFFLOAD_MACSEC_INSERT) 106 ol_flags |= RTE_MBUF_F_TX_MACSEC; 107 108 for (nb_pkt = 0; nb_pkt < nb_pkt_per_burst; nb_pkt++) { 109 if (!nb_pkt || !nb_clones) { 110 nb_clones = nb_pkt_flowgen_clones; 111 /* Logic limitation */ 112 if (nb_clones > nb_pkt_per_burst) 113 nb_clones = nb_pkt_per_burst; 114 115 pkt = rte_mbuf_raw_alloc(mbp); 116 if (!pkt) 117 break; 118 119 pkt->data_len = pkt_size; 120 pkt->next = NULL; 121 122 /* Initialize Ethernet header. */ 123 eth_hdr = rte_pktmbuf_mtod(pkt, struct rte_ether_hdr *); 124 rte_ether_addr_copy(&cfg_ether_dst, ð_hdr->dst_addr); 125 rte_ether_addr_copy(&cfg_ether_src, ð_hdr->src_addr); 126 eth_hdr->ether_type = rte_cpu_to_be_16(RTE_ETHER_TYPE_IPV4); 127 128 /* Initialize IP header. */ 129 ip_hdr = (struct rte_ipv4_hdr *)(eth_hdr + 1); 130 memset(ip_hdr, 0, sizeof(*ip_hdr)); 131 ip_hdr->version_ihl = RTE_IPV4_VHL_DEF; 132 ip_hdr->type_of_service = 0; 133 ip_hdr->fragment_offset = 0; 134 ip_hdr->time_to_live = IP_DEFTTL; 135 ip_hdr->next_proto_id = IPPROTO_UDP; 136 ip_hdr->packet_id = 0; 137 ip_hdr->src_addr = rte_cpu_to_be_32(cfg_ip_src); 138 ip_hdr->dst_addr = rte_cpu_to_be_32(cfg_ip_dst + 139 next_flow); 140 ip_hdr->total_length = RTE_CPU_TO_BE_16(pkt_size - 141 sizeof(*eth_hdr)); 142 ip_hdr->hdr_checksum = rte_ipv4_cksum(ip_hdr); 143 144 /* Initialize UDP header. */ 145 udp_hdr = (struct rte_udp_hdr *)(ip_hdr + 1); 146 udp_hdr->src_port = rte_cpu_to_be_16(cfg_udp_src); 147 udp_hdr->dst_port = rte_cpu_to_be_16(cfg_udp_dst); 148 udp_hdr->dgram_cksum = 0; /* No UDP checksum. */ 149 udp_hdr->dgram_len = RTE_CPU_TO_BE_16(pkt_size - 150 sizeof(*eth_hdr) - 151 sizeof(*ip_hdr)); 152 pkt->nb_segs = 1; 153 pkt->pkt_len = pkt_size; 154 pkt->ol_flags &= RTE_MBUF_F_EXTERNAL; 155 pkt->ol_flags |= ol_flags; 156 pkt->vlan_tci = vlan_tci; 157 pkt->vlan_tci_outer = vlan_tci_outer; 158 pkt->l2_len = sizeof(struct rte_ether_hdr); 159 pkt->l3_len = sizeof(struct rte_ipv4_hdr); 160 } else { 161 nb_clones--; 162 rte_mbuf_refcnt_update(pkt, 1); 163 } 164 pkts_burst[nb_pkt] = pkt; 165 166 if (++next_flow >= nb_flows_flowgen) 167 next_flow = 0; 168 } 169 170 nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, pkts_burst, nb_pkt); 171 /* 172 * Retry if necessary 173 */ 174 if (unlikely(nb_tx < nb_pkt) && fs->retry_enabled) { 175 retry = 0; 176 while (nb_tx < nb_pkt && retry++ < burst_tx_retry_num) { 177 rte_delay_us(burst_tx_delay_time); 178 nb_tx += rte_eth_tx_burst(fs->tx_port, fs->tx_queue, 179 &pkts_burst[nb_tx], nb_pkt - nb_tx); 180 } 181 } 182 fs->tx_packets += nb_tx; 183 184 inc_tx_burst_stats(fs, nb_tx); 185 nb_dropped = nb_pkt - nb_tx; 186 if (unlikely(nb_dropped > 0)) { 187 /* Back out the flow counter. */ 188 next_flow -= nb_dropped; 189 while (next_flow < 0) 190 next_flow += nb_flows_flowgen; 191 192 fs->fwd_dropped += nb_dropped; 193 do { 194 rte_pktmbuf_free(pkts_burst[nb_tx]); 195 } while (++nb_tx < nb_pkt); 196 } 197 198 RTE_PER_LCORE(_next_flow) = next_flow; 199 200 get_end_cycles(fs, start_tsc); 201 } 202 203 static int 204 flowgen_begin(portid_t pi) 205 { 206 printf(" number of flows for port %u: %d\n", pi, nb_flows_flowgen); 207 return 0; 208 } 209 210 struct fwd_engine flow_gen_engine = { 211 .fwd_mode_name = "flowgen", 212 .port_fwd_begin = flowgen_begin, 213 .port_fwd_end = NULL, 214 .packet_fwd = pkt_burst_flow_gen, 215 }; 216