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 /* use RFC863 Discard Protocol */ 44 uint16_t tx_udp_src_port = 9; 45 uint16_t tx_udp_dst_port = 9; 46 47 /* use RFC5735 / RFC2544 reserved network test addresses */ 48 uint32_t tx_ip_src_addr = (192U << 24) | (18 << 16) | (0 << 8) | 1; 49 uint32_t tx_ip_dst_addr = (192U << 24) | (18 << 16) | (0 << 8) | 2; 50 51 #define IP_DEFTTL 64 /* from RFC 1340. */ 52 53 static struct rte_ipv4_hdr pkt_ip_hdr; /**< IP header of transmitted packets. */ 54 RTE_DEFINE_PER_LCORE(uint8_t, _ip_var); /**< IP address variation */ 55 static struct rte_udp_hdr pkt_udp_hdr; /**< UDP header of tx 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 rte_ipv4_hdr *ip_hdr, 96 struct rte_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 rte_udp_hdr)); 107 udp_hdr->src_port = rte_cpu_to_be_16(tx_udp_src_port); 108 udp_hdr->dst_port = rte_cpu_to_be_16(tx_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 rte_ipv4_hdr)); 116 ip_hdr->version_ihl = RTE_IPV4_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(tx_ip_src_addr); 124 ip_hdr->dst_addr = rte_cpu_to_be_32(tx_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 static inline bool 151 pkt_burst_prepare(struct rte_mbuf *pkt, struct rte_mempool *mbp, 152 struct rte_ether_hdr *eth_hdr, const uint16_t vlan_tci, 153 const uint16_t vlan_tci_outer, const uint64_t ol_flags) 154 { 155 struct rte_mbuf *pkt_segs[RTE_MAX_SEGS_PER_PKT]; 156 uint8_t ip_var = RTE_PER_LCORE(_ip_var); 157 struct rte_mbuf *pkt_seg; 158 uint32_t nb_segs, pkt_len; 159 uint8_t i; 160 161 if (unlikely(tx_pkt_split == TX_PKT_SPLIT_RND)) 162 nb_segs = rte_rand() % tx_pkt_nb_segs + 1; 163 else 164 nb_segs = tx_pkt_nb_segs; 165 166 if (nb_segs > 1) { 167 if (rte_mempool_get_bulk(mbp, (void **)pkt_segs, nb_segs - 1)) 168 return false; 169 } 170 171 rte_pktmbuf_reset_headroom(pkt); 172 pkt->data_len = tx_pkt_seg_lengths[0]; 173 pkt->ol_flags = ol_flags; 174 pkt->vlan_tci = vlan_tci; 175 pkt->vlan_tci_outer = vlan_tci_outer; 176 pkt->l2_len = sizeof(struct rte_ether_hdr); 177 pkt->l3_len = sizeof(struct rte_ipv4_hdr); 178 179 pkt_len = pkt->data_len; 180 pkt_seg = pkt; 181 for (i = 1; i < nb_segs; i++) { 182 pkt_seg->next = pkt_segs[i - 1]; 183 pkt_seg = pkt_seg->next; 184 pkt_seg->data_len = tx_pkt_seg_lengths[i]; 185 pkt_len += pkt_seg->data_len; 186 } 187 pkt_seg->next = NULL; /* Last segment of packet. */ 188 /* 189 * Copy headers in first packet segment(s). 190 */ 191 copy_buf_to_pkt(eth_hdr, sizeof(*eth_hdr), pkt, 0); 192 copy_buf_to_pkt(&pkt_ip_hdr, sizeof(pkt_ip_hdr), pkt, 193 sizeof(struct rte_ether_hdr)); 194 if (txonly_multi_flow) { 195 struct rte_ipv4_hdr *ip_hdr; 196 uint32_t addr; 197 198 ip_hdr = rte_pktmbuf_mtod_offset(pkt, 199 struct rte_ipv4_hdr *, 200 sizeof(struct rte_ether_hdr)); 201 /* 202 * Generate multiple flows by varying IP src addr. This 203 * enables packets are well distributed by RSS in 204 * receiver side if any and txonly mode can be a decent 205 * packet generator for developer's quick performance 206 * regression test. 207 */ 208 addr = (tx_ip_dst_addr | (ip_var++ << 8)) + rte_lcore_id(); 209 ip_hdr->src_addr = rte_cpu_to_be_32(addr); 210 } 211 copy_buf_to_pkt(&pkt_udp_hdr, sizeof(pkt_udp_hdr), pkt, 212 sizeof(struct rte_ether_hdr) + 213 sizeof(struct rte_ipv4_hdr)); 214 /* 215 * Complete first mbuf of packet and append it to the 216 * burst of packets to be transmitted. 217 */ 218 pkt->nb_segs = nb_segs; 219 pkt->pkt_len = pkt_len; 220 221 return true; 222 } 223 224 /* 225 * Transmit a burst of multi-segments packets. 226 */ 227 static void 228 pkt_burst_transmit(struct fwd_stream *fs) 229 { 230 struct rte_mbuf *pkts_burst[MAX_PKT_BURST]; 231 struct rte_port *txp; 232 struct rte_mbuf *pkt; 233 struct rte_mempool *mbp; 234 struct rte_ether_hdr eth_hdr; 235 uint16_t nb_tx; 236 uint16_t nb_pkt; 237 uint16_t vlan_tci, vlan_tci_outer; 238 uint32_t retry; 239 uint64_t ol_flags = 0; 240 uint64_t tx_offloads; 241 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES 242 uint64_t start_tsc; 243 uint64_t end_tsc; 244 uint64_t core_cycles; 245 #endif 246 247 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES 248 start_tsc = rte_rdtsc(); 249 #endif 250 251 mbp = current_fwd_lcore()->mbp; 252 txp = &ports[fs->tx_port]; 253 tx_offloads = txp->dev_conf.txmode.offloads; 254 vlan_tci = txp->tx_vlan_id; 255 vlan_tci_outer = txp->tx_vlan_id_outer; 256 if (tx_offloads & DEV_TX_OFFLOAD_VLAN_INSERT) 257 ol_flags = PKT_TX_VLAN_PKT; 258 if (tx_offloads & DEV_TX_OFFLOAD_QINQ_INSERT) 259 ol_flags |= PKT_TX_QINQ_PKT; 260 if (tx_offloads & DEV_TX_OFFLOAD_MACSEC_INSERT) 261 ol_flags |= PKT_TX_MACSEC; 262 263 /* 264 * Initialize Ethernet header. 265 */ 266 rte_ether_addr_copy(&peer_eth_addrs[fs->peer_addr], ð_hdr.d_addr); 267 rte_ether_addr_copy(&ports[fs->tx_port].eth_addr, ð_hdr.s_addr); 268 eth_hdr.ether_type = rte_cpu_to_be_16(RTE_ETHER_TYPE_IPV4); 269 270 if (rte_mempool_get_bulk(mbp, (void **)pkts_burst, 271 nb_pkt_per_burst) == 0) { 272 for (nb_pkt = 0; nb_pkt < nb_pkt_per_burst; nb_pkt++) { 273 if (unlikely(!pkt_burst_prepare(pkts_burst[nb_pkt], mbp, 274 ð_hdr, vlan_tci, 275 vlan_tci_outer, 276 ol_flags))) { 277 rte_mempool_put_bulk(mbp, 278 (void **)&pkts_burst[nb_pkt], 279 nb_pkt_per_burst - nb_pkt); 280 break; 281 } 282 } 283 } else { 284 for (nb_pkt = 0; nb_pkt < nb_pkt_per_burst; nb_pkt++) { 285 pkt = rte_mbuf_raw_alloc(mbp); 286 if (pkt == NULL) 287 break; 288 if (unlikely(!pkt_burst_prepare(pkt, mbp, ð_hdr, 289 vlan_tci, 290 vlan_tci_outer, 291 ol_flags))) { 292 rte_pktmbuf_free(pkt); 293 break; 294 } 295 pkts_burst[nb_pkt] = pkt; 296 } 297 } 298 299 if (nb_pkt == 0) 300 return; 301 302 nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, pkts_burst, nb_pkt); 303 /* 304 * Retry if necessary 305 */ 306 if (unlikely(nb_tx < nb_pkt) && fs->retry_enabled) { 307 retry = 0; 308 while (nb_tx < nb_pkt && retry++ < burst_tx_retry_num) { 309 rte_delay_us(burst_tx_delay_time); 310 nb_tx += rte_eth_tx_burst(fs->tx_port, fs->tx_queue, 311 &pkts_burst[nb_tx], nb_pkt - nb_tx); 312 } 313 } 314 fs->tx_packets += nb_tx; 315 316 if (txonly_multi_flow) 317 RTE_PER_LCORE(_ip_var) += nb_tx; 318 319 #ifdef RTE_TEST_PMD_RECORD_BURST_STATS 320 fs->tx_burst_stats.pkt_burst_spread[nb_tx]++; 321 #endif 322 if (unlikely(nb_tx < nb_pkt)) { 323 if (verbose_level > 0 && fs->fwd_dropped == 0) 324 printf("port %d tx_queue %d - drop " 325 "(nb_pkt:%u - nb_tx:%u)=%u packets\n", 326 fs->tx_port, fs->tx_queue, 327 (unsigned) nb_pkt, (unsigned) nb_tx, 328 (unsigned) (nb_pkt - nb_tx)); 329 fs->fwd_dropped += (nb_pkt - nb_tx); 330 do { 331 rte_pktmbuf_free(pkts_burst[nb_tx]); 332 } while (++nb_tx < nb_pkt); 333 } 334 335 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES 336 end_tsc = rte_rdtsc(); 337 core_cycles = (end_tsc - start_tsc); 338 fs->core_cycles = (uint64_t) (fs->core_cycles + core_cycles); 339 #endif 340 } 341 342 static void 343 tx_only_begin(__attribute__((unused)) portid_t pi) 344 { 345 uint16_t pkt_data_len; 346 347 pkt_data_len = (uint16_t) (tx_pkt_length - ( 348 sizeof(struct rte_ether_hdr) + 349 sizeof(struct rte_ipv4_hdr) + 350 sizeof(struct rte_udp_hdr))); 351 setup_pkt_udp_ip_headers(&pkt_ip_hdr, &pkt_udp_hdr, pkt_data_len); 352 } 353 354 struct fwd_engine tx_only_engine = { 355 .fwd_mode_name = "txonly", 356 .port_fwd_begin = tx_only_begin, 357 .port_fwd_end = NULL, 358 .packet_fwd = pkt_burst_transmit, 359 }; 360