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, ð_hdr->d_addr); 127 rte_ether_addr_copy(&cfg_ether_src, ð_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 }; 210