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 = (198U << 24) | (18 << 16) | (0 << 8) | 1; 49 uint32_t tx_ip_dst_addr = (198U << 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 RTE_DEFINE_PER_LCORE(uint64_t, timestamp_qskew); 57 /**< Timestamp offset per queue */ 58 RTE_DEFINE_PER_LCORE(uint32_t, timestamp_idone); /**< Timestamp init done. */ 59 60 static uint64_t timestamp_mask; /**< Timestamp dynamic flag mask */ 61 static int32_t timestamp_off; /**< Timestamp dynamic field offset */ 62 static bool timestamp_enable; /**< Timestamp enable */ 63 static uint32_t timestamp_init_req; /**< Timestamp initialization request. */ 64 static uint64_t timestamp_initial[RTE_MAX_ETHPORTS]; 65 66 static void 67 copy_buf_to_pkt_segs(void* buf, unsigned len, struct rte_mbuf *pkt, 68 unsigned offset) 69 { 70 struct rte_mbuf *seg; 71 void *seg_buf; 72 unsigned copy_len; 73 74 seg = pkt; 75 while (offset >= seg->data_len) { 76 offset -= seg->data_len; 77 seg = seg->next; 78 } 79 copy_len = seg->data_len - offset; 80 seg_buf = rte_pktmbuf_mtod_offset(seg, char *, offset); 81 while (len > copy_len) { 82 rte_memcpy(seg_buf, buf, (size_t) copy_len); 83 len -= copy_len; 84 buf = ((char*) buf + copy_len); 85 seg = seg->next; 86 seg_buf = rte_pktmbuf_mtod(seg, char *); 87 copy_len = seg->data_len; 88 } 89 rte_memcpy(seg_buf, buf, (size_t) len); 90 } 91 92 static inline void 93 copy_buf_to_pkt(void* buf, unsigned len, struct rte_mbuf *pkt, unsigned offset) 94 { 95 if (offset + len <= pkt->data_len) { 96 rte_memcpy(rte_pktmbuf_mtod_offset(pkt, char *, offset), 97 buf, (size_t) len); 98 return; 99 } 100 copy_buf_to_pkt_segs(buf, len, pkt, offset); 101 } 102 103 static void 104 setup_pkt_udp_ip_headers(struct rte_ipv4_hdr *ip_hdr, 105 struct rte_udp_hdr *udp_hdr, 106 uint16_t pkt_data_len) 107 { 108 uint16_t *ptr16; 109 uint32_t ip_cksum; 110 uint16_t pkt_len; 111 112 /* 113 * Initialize UDP header. 114 */ 115 pkt_len = (uint16_t) (pkt_data_len + sizeof(struct rte_udp_hdr)); 116 udp_hdr->src_port = rte_cpu_to_be_16(tx_udp_src_port); 117 udp_hdr->dst_port = rte_cpu_to_be_16(tx_udp_dst_port); 118 udp_hdr->dgram_len = RTE_CPU_TO_BE_16(pkt_len); 119 udp_hdr->dgram_cksum = 0; /* No UDP checksum. */ 120 121 /* 122 * Initialize IP header. 123 */ 124 pkt_len = (uint16_t) (pkt_len + sizeof(struct rte_ipv4_hdr)); 125 ip_hdr->version_ihl = RTE_IPV4_VHL_DEF; 126 ip_hdr->type_of_service = 0; 127 ip_hdr->fragment_offset = 0; 128 ip_hdr->time_to_live = IP_DEFTTL; 129 ip_hdr->next_proto_id = IPPROTO_UDP; 130 ip_hdr->packet_id = 0; 131 ip_hdr->total_length = RTE_CPU_TO_BE_16(pkt_len); 132 ip_hdr->src_addr = rte_cpu_to_be_32(tx_ip_src_addr); 133 ip_hdr->dst_addr = rte_cpu_to_be_32(tx_ip_dst_addr); 134 135 /* 136 * Compute IP header checksum. 137 */ 138 ptr16 = (unaligned_uint16_t*) ip_hdr; 139 ip_cksum = 0; 140 ip_cksum += ptr16[0]; ip_cksum += ptr16[1]; 141 ip_cksum += ptr16[2]; ip_cksum += ptr16[3]; 142 ip_cksum += ptr16[4]; 143 ip_cksum += ptr16[6]; ip_cksum += ptr16[7]; 144 ip_cksum += ptr16[8]; ip_cksum += ptr16[9]; 145 146 /* 147 * Reduce 32 bit checksum to 16 bits and complement it. 148 */ 149 ip_cksum = ((ip_cksum & 0xFFFF0000) >> 16) + 150 (ip_cksum & 0x0000FFFF); 151 if (ip_cksum > 65535) 152 ip_cksum -= 65535; 153 ip_cksum = (~ip_cksum) & 0x0000FFFF; 154 if (ip_cksum == 0) 155 ip_cksum = 0xFFFF; 156 ip_hdr->hdr_checksum = (uint16_t) ip_cksum; 157 } 158 159 static inline bool 160 pkt_burst_prepare(struct rte_mbuf *pkt, struct rte_mempool *mbp, 161 struct rte_ether_hdr *eth_hdr, const uint16_t vlan_tci, 162 const uint16_t vlan_tci_outer, const uint64_t ol_flags, 163 const uint16_t idx, const struct fwd_stream *fs) 164 { 165 struct rte_mbuf *pkt_segs[RTE_MAX_SEGS_PER_PKT]; 166 struct rte_mbuf *pkt_seg; 167 uint32_t nb_segs, pkt_len; 168 uint8_t i; 169 170 if (unlikely(tx_pkt_split == TX_PKT_SPLIT_RND)) 171 nb_segs = rte_rand() % tx_pkt_nb_segs + 1; 172 else 173 nb_segs = tx_pkt_nb_segs; 174 175 if (nb_segs > 1) { 176 if (rte_mempool_get_bulk(mbp, (void **)pkt_segs, nb_segs - 1)) 177 return false; 178 } 179 180 rte_pktmbuf_reset_headroom(pkt); 181 pkt->data_len = tx_pkt_seg_lengths[0]; 182 pkt->ol_flags &= EXT_ATTACHED_MBUF; 183 pkt->ol_flags |= ol_flags; 184 pkt->vlan_tci = vlan_tci; 185 pkt->vlan_tci_outer = vlan_tci_outer; 186 pkt->l2_len = sizeof(struct rte_ether_hdr); 187 pkt->l3_len = sizeof(struct rte_ipv4_hdr); 188 189 pkt_len = pkt->data_len; 190 pkt_seg = pkt; 191 for (i = 1; i < nb_segs; i++) { 192 pkt_seg->next = pkt_segs[i - 1]; 193 pkt_seg = pkt_seg->next; 194 pkt_seg->data_len = tx_pkt_seg_lengths[i]; 195 pkt_len += pkt_seg->data_len; 196 } 197 pkt_seg->next = NULL; /* Last segment of packet. */ 198 /* 199 * Copy headers in first packet segment(s). 200 */ 201 copy_buf_to_pkt(eth_hdr, sizeof(*eth_hdr), pkt, 0); 202 copy_buf_to_pkt(&pkt_ip_hdr, sizeof(pkt_ip_hdr), pkt, 203 sizeof(struct rte_ether_hdr)); 204 if (txonly_multi_flow) { 205 uint8_t ip_var = RTE_PER_LCORE(_ip_var); 206 struct rte_ipv4_hdr *ip_hdr; 207 uint32_t addr; 208 209 ip_hdr = rte_pktmbuf_mtod_offset(pkt, 210 struct rte_ipv4_hdr *, 211 sizeof(struct rte_ether_hdr)); 212 /* 213 * Generate multiple flows by varying IP src addr. This 214 * enables packets are well distributed by RSS in 215 * receiver side if any and txonly mode can be a decent 216 * packet generator for developer's quick performance 217 * regression test. 218 */ 219 addr = (tx_ip_dst_addr | (ip_var++ << 8)) + rte_lcore_id(); 220 ip_hdr->src_addr = rte_cpu_to_be_32(addr); 221 RTE_PER_LCORE(_ip_var) = ip_var; 222 } 223 copy_buf_to_pkt(&pkt_udp_hdr, sizeof(pkt_udp_hdr), pkt, 224 sizeof(struct rte_ether_hdr) + 225 sizeof(struct rte_ipv4_hdr)); 226 if (unlikely(timestamp_enable)) { 227 uint64_t skew = RTE_PER_LCORE(timestamp_qskew); 228 struct { 229 rte_be32_t signature; 230 rte_be16_t pkt_idx; 231 rte_be16_t queue_idx; 232 rte_be64_t ts; 233 } timestamp_mark; 234 235 if (unlikely(timestamp_init_req != 236 RTE_PER_LCORE(timestamp_idone))) { 237 struct rte_eth_dev *dev = &rte_eth_devices[fs->tx_port]; 238 unsigned int txqs_n = dev->data->nb_tx_queues; 239 uint64_t phase = tx_pkt_times_inter * fs->tx_queue / 240 (txqs_n ? txqs_n : 1); 241 /* 242 * Initialize the scheduling time phase shift 243 * depending on queue index. 244 */ 245 skew = timestamp_initial[fs->tx_port] + 246 tx_pkt_times_inter + phase; 247 RTE_PER_LCORE(timestamp_qskew) = skew; 248 RTE_PER_LCORE(timestamp_idone) = timestamp_init_req; 249 } 250 timestamp_mark.pkt_idx = rte_cpu_to_be_16(idx); 251 timestamp_mark.queue_idx = rte_cpu_to_be_16(fs->tx_queue); 252 timestamp_mark.signature = rte_cpu_to_be_32(0xBEEFC0DE); 253 if (unlikely(!idx)) { 254 skew += tx_pkt_times_inter; 255 pkt->ol_flags |= timestamp_mask; 256 *RTE_MBUF_DYNFIELD 257 (pkt, timestamp_off, uint64_t *) = skew; 258 RTE_PER_LCORE(timestamp_qskew) = skew; 259 timestamp_mark.ts = rte_cpu_to_be_64(skew); 260 } else if (tx_pkt_times_intra) { 261 skew += tx_pkt_times_intra; 262 pkt->ol_flags |= timestamp_mask; 263 *RTE_MBUF_DYNFIELD 264 (pkt, timestamp_off, uint64_t *) = skew; 265 RTE_PER_LCORE(timestamp_qskew) = skew; 266 timestamp_mark.ts = rte_cpu_to_be_64(skew); 267 } else { 268 timestamp_mark.ts = RTE_BE64(0); 269 } 270 copy_buf_to_pkt(×tamp_mark, sizeof(timestamp_mark), pkt, 271 sizeof(struct rte_ether_hdr) + 272 sizeof(struct rte_ipv4_hdr) + 273 sizeof(pkt_udp_hdr)); 274 } 275 /* 276 * Complete first mbuf of packet and append it to the 277 * burst of packets to be transmitted. 278 */ 279 pkt->nb_segs = nb_segs; 280 pkt->pkt_len = pkt_len; 281 282 return true; 283 } 284 285 /* 286 * Transmit a burst of multi-segments packets. 287 */ 288 static void 289 pkt_burst_transmit(struct fwd_stream *fs) 290 { 291 struct rte_mbuf *pkts_burst[MAX_PKT_BURST]; 292 struct rte_port *txp; 293 struct rte_mbuf *pkt; 294 struct rte_mempool *mbp; 295 struct rte_ether_hdr eth_hdr; 296 uint16_t nb_tx; 297 uint16_t nb_pkt; 298 uint16_t vlan_tci, vlan_tci_outer; 299 uint32_t retry; 300 uint64_t ol_flags = 0; 301 uint64_t tx_offloads; 302 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES 303 uint64_t start_tsc; 304 uint64_t end_tsc; 305 uint64_t core_cycles; 306 #endif 307 308 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES 309 start_tsc = rte_rdtsc(); 310 #endif 311 312 mbp = current_fwd_lcore()->mbp; 313 txp = &ports[fs->tx_port]; 314 tx_offloads = txp->dev_conf.txmode.offloads; 315 vlan_tci = txp->tx_vlan_id; 316 vlan_tci_outer = txp->tx_vlan_id_outer; 317 if (tx_offloads & DEV_TX_OFFLOAD_VLAN_INSERT) 318 ol_flags = PKT_TX_VLAN_PKT; 319 if (tx_offloads & DEV_TX_OFFLOAD_QINQ_INSERT) 320 ol_flags |= PKT_TX_QINQ_PKT; 321 if (tx_offloads & DEV_TX_OFFLOAD_MACSEC_INSERT) 322 ol_flags |= PKT_TX_MACSEC; 323 324 /* 325 * Initialize Ethernet header. 326 */ 327 rte_ether_addr_copy(&peer_eth_addrs[fs->peer_addr], ð_hdr.d_addr); 328 rte_ether_addr_copy(&ports[fs->tx_port].eth_addr, ð_hdr.s_addr); 329 eth_hdr.ether_type = rte_cpu_to_be_16(RTE_ETHER_TYPE_IPV4); 330 331 if (rte_mempool_get_bulk(mbp, (void **)pkts_burst, 332 nb_pkt_per_burst) == 0) { 333 for (nb_pkt = 0; nb_pkt < nb_pkt_per_burst; nb_pkt++) { 334 if (unlikely(!pkt_burst_prepare(pkts_burst[nb_pkt], mbp, 335 ð_hdr, vlan_tci, 336 vlan_tci_outer, 337 ol_flags, 338 nb_pkt, fs))) { 339 rte_mempool_put_bulk(mbp, 340 (void **)&pkts_burst[nb_pkt], 341 nb_pkt_per_burst - nb_pkt); 342 break; 343 } 344 } 345 } else { 346 for (nb_pkt = 0; nb_pkt < nb_pkt_per_burst; nb_pkt++) { 347 pkt = rte_mbuf_raw_alloc(mbp); 348 if (pkt == NULL) 349 break; 350 if (unlikely(!pkt_burst_prepare(pkt, mbp, ð_hdr, 351 vlan_tci, 352 vlan_tci_outer, 353 ol_flags, 354 nb_pkt, fs))) { 355 rte_pktmbuf_free(pkt); 356 break; 357 } 358 pkts_burst[nb_pkt] = pkt; 359 } 360 } 361 362 if (nb_pkt == 0) 363 return; 364 365 nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, pkts_burst, nb_pkt); 366 367 /* 368 * Retry if necessary 369 */ 370 if (unlikely(nb_tx < nb_pkt) && fs->retry_enabled) { 371 retry = 0; 372 while (nb_tx < nb_pkt && retry++ < burst_tx_retry_num) { 373 rte_delay_us(burst_tx_delay_time); 374 nb_tx += rte_eth_tx_burst(fs->tx_port, fs->tx_queue, 375 &pkts_burst[nb_tx], nb_pkt - nb_tx); 376 } 377 } 378 fs->tx_packets += nb_tx; 379 380 if (txonly_multi_flow) 381 RTE_PER_LCORE(_ip_var) -= nb_pkt - nb_tx; 382 383 #ifdef RTE_TEST_PMD_RECORD_BURST_STATS 384 fs->tx_burst_stats.pkt_burst_spread[nb_tx]++; 385 #endif 386 if (unlikely(nb_tx < nb_pkt)) { 387 if (verbose_level > 0 && fs->fwd_dropped == 0) 388 printf("port %d tx_queue %d - drop " 389 "(nb_pkt:%u - nb_tx:%u)=%u packets\n", 390 fs->tx_port, fs->tx_queue, 391 (unsigned) nb_pkt, (unsigned) nb_tx, 392 (unsigned) (nb_pkt - nb_tx)); 393 fs->fwd_dropped += (nb_pkt - nb_tx); 394 do { 395 rte_pktmbuf_free(pkts_burst[nb_tx]); 396 } while (++nb_tx < nb_pkt); 397 } 398 399 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES 400 end_tsc = rte_rdtsc(); 401 core_cycles = (end_tsc - start_tsc); 402 fs->core_cycles = (uint64_t) (fs->core_cycles + core_cycles); 403 #endif 404 } 405 406 static void 407 tx_only_begin(portid_t pi) 408 { 409 uint16_t pkt_data_len; 410 int dynf; 411 412 pkt_data_len = (uint16_t) (tx_pkt_length - ( 413 sizeof(struct rte_ether_hdr) + 414 sizeof(struct rte_ipv4_hdr) + 415 sizeof(struct rte_udp_hdr))); 416 setup_pkt_udp_ip_headers(&pkt_ip_hdr, &pkt_udp_hdr, pkt_data_len); 417 418 timestamp_enable = false; 419 timestamp_mask = 0; 420 timestamp_off = -1; 421 RTE_PER_LCORE(timestamp_qskew) = 0; 422 dynf = rte_mbuf_dynflag_lookup 423 (RTE_MBUF_DYNFLAG_TX_TIMESTAMP_NAME, NULL); 424 if (dynf >= 0) 425 timestamp_mask = 1ULL << dynf; 426 dynf = rte_mbuf_dynfield_lookup 427 (RTE_MBUF_DYNFIELD_TIMESTAMP_NAME, NULL); 428 if (dynf >= 0) 429 timestamp_off = dynf; 430 timestamp_enable = tx_pkt_times_inter && 431 timestamp_mask && 432 timestamp_off >= 0 && 433 !rte_eth_read_clock(pi, ×tamp_initial[pi]); 434 if (timestamp_enable) 435 timestamp_init_req++; 436 /* Make sure all settings are visible on forwarding cores.*/ 437 rte_wmb(); 438 } 439 440 struct fwd_engine tx_only_engine = { 441 .fwd_mode_name = "txonly", 442 .port_fwd_begin = tx_only_begin, 443 .port_fwd_end = NULL, 444 .packet_fwd = pkt_burst_transmit, 445 }; 446