1 /*- 2 * BSD LICENSE 3 * 4 * Copyright(c) 2010-2013 Tilera Corporation. All rights reserved. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * * Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * * Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * * Neither the name of Tilera Corporation nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 25 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 * 33 */ 34 35 #include <stdarg.h> 36 #include <string.h> 37 #include <stdio.h> 38 #include <errno.h> 39 #include <stdint.h> 40 #include <unistd.h> 41 #include <inttypes.h> 42 43 #include <sys/queue.h> 44 #include <sys/stat.h> 45 46 #include <rte_common.h> 47 #include <rte_byteorder.h> 48 #include <rte_log.h> 49 #include <rte_debug.h> 50 #include <rte_cycles.h> 51 #include <rte_memory.h> 52 #include <rte_memcpy.h> 53 #include <rte_memzone.h> 54 #include <rte_launch.h> 55 #include <rte_eal.h> 56 #include <rte_per_lcore.h> 57 #include <rte_lcore.h> 58 #include <rte_atomic.h> 59 #include <rte_branch_prediction.h> 60 #include <rte_memory.h> 61 #include <rte_mempool.h> 62 #include <rte_mbuf.h> 63 #include <rte_interrupts.h> 64 #include <rte_pci.h> 65 #include <rte_ether.h> 66 #include <rte_ethdev.h> 67 #include <rte_ip.h> 68 #include <rte_tcp.h> 69 #include <rte_udp.h> 70 #include <rte_string_fns.h> 71 72 #include "testpmd.h" 73 74 /* hardcoded configuration (for now) */ 75 static unsigned cfg_n_flows = 1024; 76 static uint32_t cfg_ip_src = IPv4(10, 254, 0, 0); 77 static uint32_t cfg_ip_dst = IPv4(10, 253, 0, 0); 78 static uint16_t cfg_udp_src = 1000; 79 static uint16_t cfg_udp_dst = 1001; 80 static struct ether_addr cfg_ether_src = 81 {{ 0x00, 0x01, 0x02, 0x03, 0x04, 0x00 }}; 82 static struct ether_addr cfg_ether_dst = 83 {{ 0x00, 0x01, 0x02, 0x03, 0x04, 0x01 }}; 84 85 #define IP_DEFTTL 64 /* from RFC 1340. */ 86 #define IP_VERSION 0x40 87 #define IP_HDRLEN 0x05 /* default IP header length == five 32-bits words. */ 88 #define IP_VHL_DEF (IP_VERSION | IP_HDRLEN) 89 90 static inline uint16_t 91 ip_sum(const unaligned_uint16_t *hdr, int hdr_len) 92 { 93 uint32_t sum = 0; 94 95 while (hdr_len > 1) 96 { 97 sum += *hdr++; 98 if (sum & 0x80000000) 99 sum = (sum & 0xFFFF) + (sum >> 16); 100 hdr_len -= 2; 101 } 102 103 while (sum >> 16) 104 sum = (sum & 0xFFFF) + (sum >> 16); 105 106 return ~sum; 107 } 108 109 /* 110 * Multi-flow generation mode. 111 * 112 * We originate a bunch of flows (varying destination IP addresses), and 113 * terminate receive traffic. Received traffic is simply discarded, but we 114 * still do so in order to maintain traffic statistics. 115 */ 116 static void 117 pkt_burst_flow_gen(struct fwd_stream *fs) 118 { 119 unsigned pkt_size = tx_pkt_length - 4; /* Adjust FCS */ 120 struct rte_mbuf *pkts_burst[MAX_PKT_BURST]; 121 struct rte_mempool *mbp; 122 struct rte_mbuf *pkt; 123 struct ether_hdr *eth_hdr; 124 struct ipv4_hdr *ip_hdr; 125 struct udp_hdr *udp_hdr; 126 uint16_t vlan_tci, vlan_tci_outer; 127 uint16_t ol_flags; 128 uint16_t nb_rx; 129 uint16_t nb_tx; 130 uint16_t nb_pkt; 131 uint16_t i; 132 uint32_t retry; 133 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES 134 uint64_t start_tsc; 135 uint64_t end_tsc; 136 uint64_t core_cycles; 137 #endif 138 static int next_flow = 0; 139 140 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES 141 start_tsc = rte_rdtsc(); 142 #endif 143 144 /* Receive a burst of packets and discard them. */ 145 nb_rx = rte_eth_rx_burst(fs->rx_port, fs->rx_queue, pkts_burst, 146 nb_pkt_per_burst); 147 fs->rx_packets += nb_rx; 148 149 for (i = 0; i < nb_rx; i++) 150 rte_pktmbuf_free(pkts_burst[i]); 151 152 mbp = current_fwd_lcore()->mbp; 153 vlan_tci = ports[fs->tx_port].tx_vlan_id; 154 vlan_tci_outer = ports[fs->tx_port].tx_vlan_id_outer; 155 ol_flags = ports[fs->tx_port].tx_ol_flags; 156 157 for (nb_pkt = 0; nb_pkt < nb_pkt_per_burst; nb_pkt++) { 158 pkt = rte_mbuf_raw_alloc(mbp); 159 if (!pkt) 160 break; 161 162 pkt->data_len = pkt_size; 163 pkt->next = NULL; 164 165 /* Initialize Ethernet header. */ 166 eth_hdr = rte_pktmbuf_mtod(pkt, struct ether_hdr *); 167 ether_addr_copy(&cfg_ether_dst, ð_hdr->d_addr); 168 ether_addr_copy(&cfg_ether_src, ð_hdr->s_addr); 169 eth_hdr->ether_type = rte_cpu_to_be_16(ETHER_TYPE_IPv4); 170 171 /* Initialize IP header. */ 172 ip_hdr = (struct ipv4_hdr *)(eth_hdr + 1); 173 memset(ip_hdr, 0, sizeof(*ip_hdr)); 174 ip_hdr->version_ihl = IP_VHL_DEF; 175 ip_hdr->type_of_service = 0; 176 ip_hdr->fragment_offset = 0; 177 ip_hdr->time_to_live = IP_DEFTTL; 178 ip_hdr->next_proto_id = IPPROTO_UDP; 179 ip_hdr->packet_id = 0; 180 ip_hdr->src_addr = rte_cpu_to_be_32(cfg_ip_src); 181 ip_hdr->dst_addr = rte_cpu_to_be_32(cfg_ip_dst + 182 next_flow); 183 ip_hdr->total_length = RTE_CPU_TO_BE_16(pkt_size - 184 sizeof(*eth_hdr)); 185 ip_hdr->hdr_checksum = ip_sum((unaligned_uint16_t *)ip_hdr, 186 sizeof(*ip_hdr)); 187 188 /* Initialize UDP header. */ 189 udp_hdr = (struct udp_hdr *)(ip_hdr + 1); 190 udp_hdr->src_port = rte_cpu_to_be_16(cfg_udp_src); 191 udp_hdr->dst_port = rte_cpu_to_be_16(cfg_udp_dst); 192 udp_hdr->dgram_cksum = 0; /* No UDP checksum. */ 193 udp_hdr->dgram_len = RTE_CPU_TO_BE_16(pkt_size - 194 sizeof(*eth_hdr) - 195 sizeof(*ip_hdr)); 196 pkt->nb_segs = 1; 197 pkt->pkt_len = pkt_size; 198 pkt->ol_flags = ol_flags; 199 pkt->vlan_tci = vlan_tci; 200 pkt->vlan_tci_outer = vlan_tci_outer; 201 pkt->l2_len = sizeof(struct ether_hdr); 202 pkt->l3_len = sizeof(struct ipv4_hdr); 203 pkts_burst[nb_pkt] = pkt; 204 205 next_flow = (next_flow + 1) % cfg_n_flows; 206 } 207 208 nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, pkts_burst, nb_pkt); 209 /* 210 * Retry if necessary 211 */ 212 if (unlikely(nb_tx < nb_rx) && fs->retry_enabled) { 213 retry = 0; 214 while (nb_tx < nb_rx && retry++ < burst_tx_retry_num) { 215 rte_delay_us(burst_tx_delay_time); 216 nb_tx += rte_eth_tx_burst(fs->tx_port, fs->tx_queue, 217 &pkts_burst[nb_tx], nb_rx - nb_tx); 218 } 219 } 220 fs->tx_packets += nb_tx; 221 222 #ifdef RTE_TEST_PMD_RECORD_BURST_STATS 223 fs->tx_burst_stats.pkt_burst_spread[nb_tx]++; 224 #endif 225 if (unlikely(nb_tx < nb_pkt)) { 226 /* Back out the flow counter. */ 227 next_flow -= (nb_pkt - nb_tx); 228 while (next_flow < 0) 229 next_flow += cfg_n_flows; 230 231 do { 232 rte_pktmbuf_free(pkts_burst[nb_tx]); 233 } while (++nb_tx < nb_pkt); 234 } 235 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES 236 end_tsc = rte_rdtsc(); 237 core_cycles = (end_tsc - start_tsc); 238 fs->core_cycles = (uint64_t) (fs->core_cycles + core_cycles); 239 #endif 240 } 241 242 struct fwd_engine flow_gen_engine = { 243 .fwd_mode_name = "flowgen", 244 .port_fwd_begin = NULL, 245 .port_fwd_end = NULL, 246 .packet_fwd = pkt_burst_flow_gen, 247 }; 248