1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright(c) 2010-2014 Intel Corporation 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 #define UDP_SRC_PORT 1024 44 #define UDP_DST_PORT 1024 45 46 #define IP_SRC_ADDR ((192U << 24) | (168 << 16) | (0 << 8) | 1) 47 #define IP_DST_ADDR ((192U << 24) | (168 << 16) | (0 << 8) | 2) 48 49 #define IP_DEFTTL 64 /* from RFC 1340. */ 50 #define IP_VERSION 0x40 51 #define IP_HDRLEN 0x05 /* default IP header length == five 32-bits words. */ 52 #define IP_VHL_DEF (IP_VERSION | IP_HDRLEN) 53 54 static struct ipv4_hdr pkt_ip_hdr; /**< IP header of transmitted packets. */ 55 static struct udp_hdr pkt_udp_hdr; /**< UDP header of transmitted packets. */ 56 57 static void 58 copy_buf_to_pkt_segs(void* buf, unsigned len, struct rte_mbuf *pkt, 59 unsigned offset) 60 { 61 struct rte_mbuf *seg; 62 void *seg_buf; 63 unsigned copy_len; 64 65 seg = pkt; 66 while (offset >= seg->data_len) { 67 offset -= seg->data_len; 68 seg = seg->next; 69 } 70 copy_len = seg->data_len - offset; 71 seg_buf = rte_pktmbuf_mtod_offset(seg, char *, offset); 72 while (len > copy_len) { 73 rte_memcpy(seg_buf, buf, (size_t) copy_len); 74 len -= copy_len; 75 buf = ((char*) buf + copy_len); 76 seg = seg->next; 77 seg_buf = rte_pktmbuf_mtod(seg, char *); 78 copy_len = seg->data_len; 79 } 80 rte_memcpy(seg_buf, buf, (size_t) len); 81 } 82 83 static inline void 84 copy_buf_to_pkt(void* buf, unsigned len, struct rte_mbuf *pkt, unsigned offset) 85 { 86 if (offset + len <= pkt->data_len) { 87 rte_memcpy(rte_pktmbuf_mtod_offset(pkt, char *, offset), 88 buf, (size_t) len); 89 return; 90 } 91 copy_buf_to_pkt_segs(buf, len, pkt, offset); 92 } 93 94 static void 95 setup_pkt_udp_ip_headers(struct ipv4_hdr *ip_hdr, 96 struct udp_hdr *udp_hdr, 97 uint16_t pkt_data_len) 98 { 99 uint16_t *ptr16; 100 uint32_t ip_cksum; 101 uint16_t pkt_len; 102 103 /* 104 * Initialize UDP header. 105 */ 106 pkt_len = (uint16_t) (pkt_data_len + sizeof(struct udp_hdr)); 107 udp_hdr->src_port = rte_cpu_to_be_16(UDP_SRC_PORT); 108 udp_hdr->dst_port = rte_cpu_to_be_16(UDP_DST_PORT); 109 udp_hdr->dgram_len = RTE_CPU_TO_BE_16(pkt_len); 110 udp_hdr->dgram_cksum = 0; /* No UDP checksum. */ 111 112 /* 113 * Initialize IP header. 114 */ 115 pkt_len = (uint16_t) (pkt_len + sizeof(struct ipv4_hdr)); 116 ip_hdr->version_ihl = IP_VHL_DEF; 117 ip_hdr->type_of_service = 0; 118 ip_hdr->fragment_offset = 0; 119 ip_hdr->time_to_live = IP_DEFTTL; 120 ip_hdr->next_proto_id = IPPROTO_UDP; 121 ip_hdr->packet_id = 0; 122 ip_hdr->total_length = RTE_CPU_TO_BE_16(pkt_len); 123 ip_hdr->src_addr = rte_cpu_to_be_32(IP_SRC_ADDR); 124 ip_hdr->dst_addr = rte_cpu_to_be_32(IP_DST_ADDR); 125 126 /* 127 * Compute IP header checksum. 128 */ 129 ptr16 = (unaligned_uint16_t*) ip_hdr; 130 ip_cksum = 0; 131 ip_cksum += ptr16[0]; ip_cksum += ptr16[1]; 132 ip_cksum += ptr16[2]; ip_cksum += ptr16[3]; 133 ip_cksum += ptr16[4]; 134 ip_cksum += ptr16[6]; ip_cksum += ptr16[7]; 135 ip_cksum += ptr16[8]; ip_cksum += ptr16[9]; 136 137 /* 138 * Reduce 32 bit checksum to 16 bits and complement it. 139 */ 140 ip_cksum = ((ip_cksum & 0xFFFF0000) >> 16) + 141 (ip_cksum & 0x0000FFFF); 142 if (ip_cksum > 65535) 143 ip_cksum -= 65535; 144 ip_cksum = (~ip_cksum) & 0x0000FFFF; 145 if (ip_cksum == 0) 146 ip_cksum = 0xFFFF; 147 ip_hdr->hdr_checksum = (uint16_t) ip_cksum; 148 } 149 150 /* 151 * Transmit a burst of multi-segments packets. 152 */ 153 static void 154 pkt_burst_transmit(struct fwd_stream *fs) 155 { 156 struct rte_mbuf *pkts_burst[MAX_PKT_BURST]; 157 struct rte_port *txp; 158 struct rte_mbuf *pkt; 159 struct rte_mbuf *pkt_seg; 160 struct rte_mempool *mbp; 161 struct ether_hdr eth_hdr; 162 uint16_t nb_tx; 163 uint16_t nb_pkt; 164 uint16_t vlan_tci, vlan_tci_outer; 165 uint32_t retry; 166 uint64_t ol_flags = 0; 167 uint8_t i; 168 uint64_t tx_offloads; 169 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES 170 uint64_t start_tsc; 171 uint64_t end_tsc; 172 uint64_t core_cycles; 173 #endif 174 uint32_t nb_segs, pkt_len; 175 176 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES 177 start_tsc = rte_rdtsc(); 178 #endif 179 180 mbp = current_fwd_lcore()->mbp; 181 txp = &ports[fs->tx_port]; 182 tx_offloads = txp->dev_conf.txmode.offloads; 183 vlan_tci = txp->tx_vlan_id; 184 vlan_tci_outer = txp->tx_vlan_id_outer; 185 if (tx_offloads & DEV_TX_OFFLOAD_VLAN_INSERT) 186 ol_flags = PKT_TX_VLAN_PKT; 187 if (tx_offloads & DEV_TX_OFFLOAD_QINQ_INSERT) 188 ol_flags |= PKT_TX_QINQ_PKT; 189 if (tx_offloads & DEV_TX_OFFLOAD_MACSEC_INSERT) 190 ol_flags |= PKT_TX_MACSEC; 191 for (nb_pkt = 0; nb_pkt < nb_pkt_per_burst; nb_pkt++) { 192 pkt = rte_mbuf_raw_alloc(mbp); 193 if (pkt == NULL) { 194 nomore_mbuf: 195 if (nb_pkt == 0) 196 return; 197 break; 198 } 199 200 /* 201 * Using raw alloc is good to improve performance, 202 * but some consumers may use the headroom and so 203 * decrement data_off. We need to make sure it is 204 * reset to default value. 205 */ 206 rte_pktmbuf_reset_headroom(pkt); 207 pkt->data_len = tx_pkt_seg_lengths[0]; 208 pkt_seg = pkt; 209 if (tx_pkt_split == TX_PKT_SPLIT_RND) 210 nb_segs = random() % tx_pkt_nb_segs + 1; 211 else 212 nb_segs = tx_pkt_nb_segs; 213 pkt_len = pkt->data_len; 214 for (i = 1; i < nb_segs; i++) { 215 pkt_seg->next = rte_mbuf_raw_alloc(mbp); 216 if (pkt_seg->next == NULL) { 217 pkt->nb_segs = i; 218 rte_pktmbuf_free(pkt); 219 goto nomore_mbuf; 220 } 221 pkt_seg = pkt_seg->next; 222 pkt_seg->data_len = tx_pkt_seg_lengths[i]; 223 pkt_len += pkt_seg->data_len; 224 } 225 pkt_seg->next = NULL; /* Last segment of packet. */ 226 227 /* 228 * Initialize Ethernet header. 229 */ 230 ether_addr_copy(&peer_eth_addrs[fs->peer_addr],ð_hdr.d_addr); 231 ether_addr_copy(&ports[fs->tx_port].eth_addr, ð_hdr.s_addr); 232 eth_hdr.ether_type = rte_cpu_to_be_16(ETHER_TYPE_IPv4); 233 234 /* 235 * Copy headers in first packet segment(s). 236 */ 237 copy_buf_to_pkt(ð_hdr, sizeof(eth_hdr), pkt, 0); 238 copy_buf_to_pkt(&pkt_ip_hdr, sizeof(pkt_ip_hdr), pkt, 239 sizeof(struct ether_hdr)); 240 copy_buf_to_pkt(&pkt_udp_hdr, sizeof(pkt_udp_hdr), pkt, 241 sizeof(struct ether_hdr) + 242 sizeof(struct ipv4_hdr)); 243 244 /* 245 * Complete first mbuf of packet and append it to the 246 * burst of packets to be transmitted. 247 */ 248 pkt->nb_segs = nb_segs; 249 pkt->pkt_len = pkt_len; 250 pkt->ol_flags = ol_flags; 251 pkt->vlan_tci = vlan_tci; 252 pkt->vlan_tci_outer = vlan_tci_outer; 253 pkt->l2_len = sizeof(struct ether_hdr); 254 pkt->l3_len = sizeof(struct ipv4_hdr); 255 pkts_burst[nb_pkt] = pkt; 256 } 257 nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, pkts_burst, nb_pkt); 258 /* 259 * Retry if necessary 260 */ 261 if (unlikely(nb_tx < nb_pkt) && fs->retry_enabled) { 262 retry = 0; 263 while (nb_tx < nb_pkt && retry++ < burst_tx_retry_num) { 264 rte_delay_us(burst_tx_delay_time); 265 nb_tx += rte_eth_tx_burst(fs->tx_port, fs->tx_queue, 266 &pkts_burst[nb_tx], nb_pkt - nb_tx); 267 } 268 } 269 fs->tx_packets += nb_tx; 270 271 #ifdef RTE_TEST_PMD_RECORD_BURST_STATS 272 fs->tx_burst_stats.pkt_burst_spread[nb_tx]++; 273 #endif 274 if (unlikely(nb_tx < nb_pkt)) { 275 if (verbose_level > 0 && fs->fwd_dropped == 0) 276 printf("port %d tx_queue %d - drop " 277 "(nb_pkt:%u - nb_tx:%u)=%u packets\n", 278 fs->tx_port, fs->tx_queue, 279 (unsigned) nb_pkt, (unsigned) nb_tx, 280 (unsigned) (nb_pkt - nb_tx)); 281 fs->fwd_dropped += (nb_pkt - nb_tx); 282 do { 283 rte_pktmbuf_free(pkts_burst[nb_tx]); 284 } while (++nb_tx < nb_pkt); 285 } 286 287 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES 288 end_tsc = rte_rdtsc(); 289 core_cycles = (end_tsc - start_tsc); 290 fs->core_cycles = (uint64_t) (fs->core_cycles + core_cycles); 291 #endif 292 } 293 294 static void 295 tx_only_begin(__attribute__((unused)) portid_t pi) 296 { 297 uint16_t pkt_data_len; 298 299 pkt_data_len = (uint16_t) (tx_pkt_length - (sizeof(struct ether_hdr) + 300 sizeof(struct ipv4_hdr) + 301 sizeof(struct udp_hdr))); 302 setup_pkt_udp_ip_headers(&pkt_ip_hdr, &pkt_udp_hdr, pkt_data_len); 303 } 304 305 struct fwd_engine tx_only_engine = { 306 .fwd_mode_name = "txonly", 307 .port_fwd_begin = tx_only_begin, 308 .port_fwd_end = NULL, 309 .packet_fwd = pkt_burst_transmit, 310 }; 311