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 /* Use this type to inform GCC that ip_sum violates aliasing rules. */ 57 typedef unaligned_uint16_t alias_int16_t __attribute__((__may_alias__)); 58 59 static inline uint16_t 60 ip_sum(const alias_int16_t *hdr, int hdr_len) 61 { 62 uint32_t sum = 0; 63 64 while (hdr_len > 1) 65 { 66 sum += *hdr++; 67 if (sum & 0x80000000) 68 sum = (sum & 0xFFFF) + (sum >> 16); 69 hdr_len -= 2; 70 } 71 72 while (sum >> 16) 73 sum = (sum & 0xFFFF) + (sum >> 16); 74 75 return ~sum; 76 } 77 78 /* 79 * Multi-flow generation mode. 80 * 81 * We originate a bunch of flows (varying destination IP addresses), and 82 * terminate receive traffic. Received traffic is simply discarded, but we 83 * still do so in order to maintain traffic statistics. 84 */ 85 static void 86 pkt_burst_flow_gen(struct fwd_stream *fs) 87 { 88 unsigned pkt_size = tx_pkt_length - 4; /* Adjust FCS */ 89 struct rte_mbuf *pkts_burst[MAX_PKT_BURST]; 90 struct rte_mempool *mbp; 91 struct rte_mbuf *pkt = NULL; 92 struct rte_ether_hdr *eth_hdr; 93 struct rte_ipv4_hdr *ip_hdr; 94 struct rte_udp_hdr *udp_hdr; 95 uint16_t vlan_tci, vlan_tci_outer; 96 uint64_t ol_flags = 0; 97 uint16_t nb_rx; 98 uint16_t nb_tx; 99 uint16_t nb_pkt; 100 uint16_t nb_clones = nb_pkt_flowgen_clones; 101 uint16_t i; 102 uint32_t retry; 103 uint64_t tx_offloads; 104 uint64_t start_tsc = 0; 105 static int next_flow = 0; 106 107 get_start_cycles(&start_tsc); 108 109 /* Receive a burst of packets and discard them. */ 110 nb_rx = rte_eth_rx_burst(fs->rx_port, fs->rx_queue, pkts_burst, 111 nb_pkt_per_burst); 112 fs->rx_packets += nb_rx; 113 114 for (i = 0; i < nb_rx; i++) 115 rte_pktmbuf_free(pkts_burst[i]); 116 117 mbp = current_fwd_lcore()->mbp; 118 vlan_tci = ports[fs->tx_port].tx_vlan_id; 119 vlan_tci_outer = ports[fs->tx_port].tx_vlan_id_outer; 120 121 tx_offloads = ports[fs->tx_port].dev_conf.txmode.offloads; 122 if (tx_offloads & DEV_TX_OFFLOAD_VLAN_INSERT) 123 ol_flags |= PKT_TX_VLAN_PKT; 124 if (tx_offloads & DEV_TX_OFFLOAD_QINQ_INSERT) 125 ol_flags |= PKT_TX_QINQ_PKT; 126 if (tx_offloads & DEV_TX_OFFLOAD_MACSEC_INSERT) 127 ol_flags |= PKT_TX_MACSEC; 128 129 for (nb_pkt = 0; nb_pkt < nb_pkt_per_burst; nb_pkt++) { 130 if (!nb_pkt || !nb_clones) { 131 nb_clones = nb_pkt_flowgen_clones; 132 /* Logic limitation */ 133 if (nb_clones > nb_pkt_per_burst) 134 nb_clones = nb_pkt_per_burst; 135 136 pkt = rte_mbuf_raw_alloc(mbp); 137 if (!pkt) 138 break; 139 140 pkt->data_len = pkt_size; 141 pkt->next = NULL; 142 143 /* Initialize Ethernet header. */ 144 eth_hdr = rte_pktmbuf_mtod(pkt, struct rte_ether_hdr *); 145 rte_ether_addr_copy(&cfg_ether_dst, ð_hdr->d_addr); 146 rte_ether_addr_copy(&cfg_ether_src, ð_hdr->s_addr); 147 eth_hdr->ether_type = rte_cpu_to_be_16(RTE_ETHER_TYPE_IPV4); 148 149 /* Initialize IP header. */ 150 ip_hdr = (struct rte_ipv4_hdr *)(eth_hdr + 1); 151 memset(ip_hdr, 0, sizeof(*ip_hdr)); 152 ip_hdr->version_ihl = RTE_IPV4_VHL_DEF; 153 ip_hdr->type_of_service = 0; 154 ip_hdr->fragment_offset = 0; 155 ip_hdr->time_to_live = IP_DEFTTL; 156 ip_hdr->next_proto_id = IPPROTO_UDP; 157 ip_hdr->packet_id = 0; 158 ip_hdr->src_addr = rte_cpu_to_be_32(cfg_ip_src); 159 ip_hdr->dst_addr = rte_cpu_to_be_32(cfg_ip_dst + 160 next_flow); 161 ip_hdr->total_length = RTE_CPU_TO_BE_16(pkt_size - 162 sizeof(*eth_hdr)); 163 ip_hdr->hdr_checksum = ip_sum((const alias_int16_t *)ip_hdr, 164 sizeof(*ip_hdr)); 165 166 /* Initialize UDP header. */ 167 udp_hdr = (struct rte_udp_hdr *)(ip_hdr + 1); 168 udp_hdr->src_port = rte_cpu_to_be_16(cfg_udp_src); 169 udp_hdr->dst_port = rte_cpu_to_be_16(cfg_udp_dst); 170 udp_hdr->dgram_cksum = 0; /* No UDP checksum. */ 171 udp_hdr->dgram_len = RTE_CPU_TO_BE_16(pkt_size - 172 sizeof(*eth_hdr) - 173 sizeof(*ip_hdr)); 174 pkt->nb_segs = 1; 175 pkt->pkt_len = pkt_size; 176 pkt->ol_flags &= EXT_ATTACHED_MBUF; 177 pkt->ol_flags |= ol_flags; 178 pkt->vlan_tci = vlan_tci; 179 pkt->vlan_tci_outer = vlan_tci_outer; 180 pkt->l2_len = sizeof(struct rte_ether_hdr); 181 pkt->l3_len = sizeof(struct rte_ipv4_hdr); 182 } else { 183 nb_clones--; 184 rte_mbuf_refcnt_update(pkt, 1); 185 } 186 pkts_burst[nb_pkt] = pkt; 187 188 next_flow = (next_flow + 1) % cfg_n_flows; 189 } 190 191 nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, pkts_burst, nb_pkt); 192 /* 193 * Retry if necessary 194 */ 195 if (unlikely(nb_tx < nb_rx) && fs->retry_enabled) { 196 retry = 0; 197 while (nb_tx < nb_rx && retry++ < burst_tx_retry_num) { 198 rte_delay_us(burst_tx_delay_time); 199 nb_tx += rte_eth_tx_burst(fs->tx_port, fs->tx_queue, 200 &pkts_burst[nb_tx], nb_rx - nb_tx); 201 } 202 } 203 fs->tx_packets += nb_tx; 204 205 inc_tx_burst_stats(fs, nb_tx); 206 if (unlikely(nb_tx < nb_pkt)) { 207 /* Back out the flow counter. */ 208 next_flow -= (nb_pkt - nb_tx); 209 while (next_flow < 0) 210 next_flow += cfg_n_flows; 211 212 do { 213 rte_pktmbuf_free(pkts_burst[nb_tx]); 214 } while (++nb_tx < nb_pkt); 215 } 216 217 get_end_cycles(fs, start_tsc); 218 } 219 220 struct fwd_engine flow_gen_engine = { 221 .fwd_mode_name = "flowgen", 222 .port_fwd_begin = NULL, 223 .port_fwd_end = NULL, 224 .packet_fwd = pkt_burst_flow_gen, 225 }; 226