1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2010-2014 Intel Corporation
13 #include <sys/queue.h>
16 #include <rte_common.h>
17 #include <rte_byteorder.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>
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>
31 #include <rte_interrupts.h>
33 #include <rte_ether.h>
34 #include <rte_ethdev.h>
38 #include <rte_string_fns.h>
43 /* use RFC863 Discard Protocol */
44 uint16_t tx_udp_src_port = 9;
45 uint16_t tx_udp_dst_port = 9;
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;
51 #define IP_DEFTTL 64 /* from RFC 1340. */
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 static uint64_t timestamp_mask; /**< Timestamp dynamic flag mask */
59 static int32_t timestamp_off; /**< Timestamp dynamic field offset */
60 static bool timestamp_enable; /**< Timestamp enable */
61 static uint64_t timestamp_initial[RTE_MAX_ETHPORTS];
64 copy_buf_to_pkt_segs(void* buf, unsigned len, struct rte_mbuf *pkt,
72 while (offset >= seg->data_len) {
73 offset -= seg->data_len;
76 copy_len = seg->data_len - offset;
77 seg_buf = rte_pktmbuf_mtod_offset(seg, char *, offset);
78 while (len > copy_len) {
79 rte_memcpy(seg_buf, buf, (size_t) copy_len);
81 buf = ((char*) buf + copy_len);
83 seg_buf = rte_pktmbuf_mtod(seg, char *);
84 copy_len = seg->data_len;
86 rte_memcpy(seg_buf, buf, (size_t) len);
90 copy_buf_to_pkt(void* buf, unsigned len, struct rte_mbuf *pkt, unsigned offset)
92 if (offset + len <= pkt->data_len) {
93 rte_memcpy(rte_pktmbuf_mtod_offset(pkt, char *, offset),
97 copy_buf_to_pkt_segs(buf, len, pkt, offset);
101 setup_pkt_udp_ip_headers(struct rte_ipv4_hdr *ip_hdr,
102 struct rte_udp_hdr *udp_hdr,
103 uint16_t pkt_data_len)
110 * Initialize UDP header.
112 pkt_len = (uint16_t) (pkt_data_len + sizeof(struct rte_udp_hdr));
113 udp_hdr->src_port = rte_cpu_to_be_16(tx_udp_src_port);
114 udp_hdr->dst_port = rte_cpu_to_be_16(tx_udp_dst_port);
115 udp_hdr->dgram_len = RTE_CPU_TO_BE_16(pkt_len);
116 udp_hdr->dgram_cksum = 0; /* No UDP checksum. */
119 * Initialize IP header.
121 pkt_len = (uint16_t) (pkt_len + sizeof(struct rte_ipv4_hdr));
122 ip_hdr->version_ihl = RTE_IPV4_VHL_DEF;
123 ip_hdr->type_of_service = 0;
124 ip_hdr->fragment_offset = 0;
125 ip_hdr->time_to_live = IP_DEFTTL;
126 ip_hdr->next_proto_id = IPPROTO_UDP;
127 ip_hdr->packet_id = 0;
128 ip_hdr->total_length = RTE_CPU_TO_BE_16(pkt_len);
129 ip_hdr->src_addr = rte_cpu_to_be_32(tx_ip_src_addr);
130 ip_hdr->dst_addr = rte_cpu_to_be_32(tx_ip_dst_addr);
133 * Compute IP header checksum.
135 ptr16 = (unaligned_uint16_t*) ip_hdr;
137 ip_cksum += ptr16[0]; ip_cksum += ptr16[1];
138 ip_cksum += ptr16[2]; ip_cksum += ptr16[3];
139 ip_cksum += ptr16[4];
140 ip_cksum += ptr16[6]; ip_cksum += ptr16[7];
141 ip_cksum += ptr16[8]; ip_cksum += ptr16[9];
144 * Reduce 32 bit checksum to 16 bits and complement it.
146 ip_cksum = ((ip_cksum & 0xFFFF0000) >> 16) +
147 (ip_cksum & 0x0000FFFF);
148 if (ip_cksum > 65535)
150 ip_cksum = (~ip_cksum) & 0x0000FFFF;
153 ip_hdr->hdr_checksum = (uint16_t) ip_cksum;
157 pkt_burst_prepare(struct rte_mbuf *pkt, struct rte_mempool *mbp,
158 struct rte_ether_hdr *eth_hdr, const uint16_t vlan_tci,
159 const uint16_t vlan_tci_outer, const uint64_t ol_flags,
160 const uint16_t idx, const struct fwd_stream *fs)
162 struct rte_mbuf *pkt_segs[RTE_MAX_SEGS_PER_PKT];
163 struct rte_mbuf *pkt_seg;
164 uint32_t nb_segs, pkt_len;
167 if (unlikely(tx_pkt_split == TX_PKT_SPLIT_RND))
168 nb_segs = rte_rand() % tx_pkt_nb_segs + 1;
170 nb_segs = tx_pkt_nb_segs;
173 if (rte_mempool_get_bulk(mbp, (void **)pkt_segs, nb_segs - 1))
177 rte_pktmbuf_reset_headroom(pkt);
178 pkt->data_len = tx_pkt_seg_lengths[0];
179 pkt->ol_flags &= EXT_ATTACHED_MBUF;
180 pkt->ol_flags |= ol_flags;
181 pkt->vlan_tci = vlan_tci;
182 pkt->vlan_tci_outer = vlan_tci_outer;
183 pkt->l2_len = sizeof(struct rte_ether_hdr);
184 pkt->l3_len = sizeof(struct rte_ipv4_hdr);
186 pkt_len = pkt->data_len;
188 for (i = 1; i < nb_segs; i++) {
189 pkt_seg->next = pkt_segs[i - 1];
190 pkt_seg = pkt_seg->next;
191 pkt_seg->data_len = tx_pkt_seg_lengths[i];
192 pkt_len += pkt_seg->data_len;
194 pkt_seg->next = NULL; /* Last segment of packet. */
196 * Copy headers in first packet segment(s).
198 copy_buf_to_pkt(eth_hdr, sizeof(*eth_hdr), pkt, 0);
199 copy_buf_to_pkt(&pkt_ip_hdr, sizeof(pkt_ip_hdr), pkt,
200 sizeof(struct rte_ether_hdr));
201 if (txonly_multi_flow) {
202 uint8_t ip_var = RTE_PER_LCORE(_ip_var);
203 struct rte_ipv4_hdr *ip_hdr;
206 ip_hdr = rte_pktmbuf_mtod_offset(pkt,
207 struct rte_ipv4_hdr *,
208 sizeof(struct rte_ether_hdr));
210 * Generate multiple flows by varying IP src addr. This
211 * enables packets are well distributed by RSS in
212 * receiver side if any and txonly mode can be a decent
213 * packet generator for developer's quick performance
216 addr = (tx_ip_dst_addr | (ip_var++ << 8)) + rte_lcore_id();
217 ip_hdr->src_addr = rte_cpu_to_be_32(addr);
218 RTE_PER_LCORE(_ip_var) = ip_var;
220 copy_buf_to_pkt(&pkt_udp_hdr, sizeof(pkt_udp_hdr), pkt,
221 sizeof(struct rte_ether_hdr) +
222 sizeof(struct rte_ipv4_hdr));
223 if (unlikely(timestamp_enable)) {
224 uint64_t skew = RTE_PER_LCORE(timestamp_qskew);
226 rte_be32_t signature;
228 rte_be16_t queue_idx;
232 if (unlikely(!skew)) {
233 struct rte_eth_dev *dev = &rte_eth_devices[fs->tx_port];
234 unsigned int txqs_n = dev->data->nb_tx_queues;
235 uint64_t phase = tx_pkt_times_inter * fs->tx_queue /
236 (txqs_n ? txqs_n : 1);
238 * Initialize the scheduling time phase shift
239 * depending on queue index.
241 skew = timestamp_initial[fs->tx_port] +
242 tx_pkt_times_inter + phase;
243 RTE_PER_LCORE(timestamp_qskew) = skew;
245 timestamp_mark.pkt_idx = rte_cpu_to_be_16(idx);
246 timestamp_mark.queue_idx = rte_cpu_to_be_16(fs->tx_queue);
247 timestamp_mark.signature = rte_cpu_to_be_32(0xBEEFC0DE);
248 if (unlikely(!idx)) {
249 skew += tx_pkt_times_inter;
250 pkt->ol_flags |= timestamp_mask;
252 (pkt, timestamp_off, uint64_t *) = skew;
253 RTE_PER_LCORE(timestamp_qskew) = skew;
254 timestamp_mark.ts = rte_cpu_to_be_64(skew);
255 } else if (tx_pkt_times_intra) {
256 skew += tx_pkt_times_intra;
257 pkt->ol_flags |= timestamp_mask;
259 (pkt, timestamp_off, uint64_t *) = skew;
260 RTE_PER_LCORE(timestamp_qskew) = skew;
261 timestamp_mark.ts = rte_cpu_to_be_64(skew);
263 timestamp_mark.ts = RTE_BE64(0);
265 copy_buf_to_pkt(×tamp_mark, sizeof(timestamp_mark), pkt,
266 sizeof(struct rte_ether_hdr) +
267 sizeof(struct rte_ipv4_hdr) +
268 sizeof(pkt_udp_hdr));
271 * Complete first mbuf of packet and append it to the
272 * burst of packets to be transmitted.
274 pkt->nb_segs = nb_segs;
275 pkt->pkt_len = pkt_len;
281 * Transmit a burst of multi-segments packets.
284 pkt_burst_transmit(struct fwd_stream *fs)
286 struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
287 struct rte_port *txp;
288 struct rte_mbuf *pkt;
289 struct rte_mempool *mbp;
290 struct rte_ether_hdr eth_hdr;
293 uint16_t vlan_tci, vlan_tci_outer;
295 uint64_t ol_flags = 0;
296 uint64_t tx_offloads;
297 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
300 uint64_t core_cycles;
303 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
304 start_tsc = rte_rdtsc();
307 mbp = current_fwd_lcore()->mbp;
308 txp = &ports[fs->tx_port];
309 tx_offloads = txp->dev_conf.txmode.offloads;
310 vlan_tci = txp->tx_vlan_id;
311 vlan_tci_outer = txp->tx_vlan_id_outer;
312 if (tx_offloads & DEV_TX_OFFLOAD_VLAN_INSERT)
313 ol_flags = PKT_TX_VLAN_PKT;
314 if (tx_offloads & DEV_TX_OFFLOAD_QINQ_INSERT)
315 ol_flags |= PKT_TX_QINQ_PKT;
316 if (tx_offloads & DEV_TX_OFFLOAD_MACSEC_INSERT)
317 ol_flags |= PKT_TX_MACSEC;
320 * Initialize Ethernet header.
322 rte_ether_addr_copy(&peer_eth_addrs[fs->peer_addr], ð_hdr.d_addr);
323 rte_ether_addr_copy(&ports[fs->tx_port].eth_addr, ð_hdr.s_addr);
324 eth_hdr.ether_type = rte_cpu_to_be_16(RTE_ETHER_TYPE_IPV4);
326 if (rte_mempool_get_bulk(mbp, (void **)pkts_burst,
327 nb_pkt_per_burst) == 0) {
328 for (nb_pkt = 0; nb_pkt < nb_pkt_per_burst; nb_pkt++) {
329 if (unlikely(!pkt_burst_prepare(pkts_burst[nb_pkt], mbp,
334 rte_mempool_put_bulk(mbp,
335 (void **)&pkts_burst[nb_pkt],
336 nb_pkt_per_burst - nb_pkt);
341 for (nb_pkt = 0; nb_pkt < nb_pkt_per_burst; nb_pkt++) {
342 pkt = rte_mbuf_raw_alloc(mbp);
345 if (unlikely(!pkt_burst_prepare(pkt, mbp, ð_hdr,
350 rte_pktmbuf_free(pkt);
353 pkts_burst[nb_pkt] = pkt;
360 nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, pkts_burst, nb_pkt);
365 if (unlikely(nb_tx < nb_pkt) && fs->retry_enabled) {
367 while (nb_tx < nb_pkt && retry++ < burst_tx_retry_num) {
368 rte_delay_us(burst_tx_delay_time);
369 nb_tx += rte_eth_tx_burst(fs->tx_port, fs->tx_queue,
370 &pkts_burst[nb_tx], nb_pkt - nb_tx);
373 fs->tx_packets += nb_tx;
375 if (txonly_multi_flow)
376 RTE_PER_LCORE(_ip_var) -= nb_pkt - nb_tx;
378 #ifdef RTE_TEST_PMD_RECORD_BURST_STATS
379 fs->tx_burst_stats.pkt_burst_spread[nb_tx]++;
381 if (unlikely(nb_tx < nb_pkt)) {
382 if (verbose_level > 0 && fs->fwd_dropped == 0)
383 printf("port %d tx_queue %d - drop "
384 "(nb_pkt:%u - nb_tx:%u)=%u packets\n",
385 fs->tx_port, fs->tx_queue,
386 (unsigned) nb_pkt, (unsigned) nb_tx,
387 (unsigned) (nb_pkt - nb_tx));
388 fs->fwd_dropped += (nb_pkt - nb_tx);
390 rte_pktmbuf_free(pkts_burst[nb_tx]);
391 } while (++nb_tx < nb_pkt);
394 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
395 end_tsc = rte_rdtsc();
396 core_cycles = (end_tsc - start_tsc);
397 fs->core_cycles = (uint64_t) (fs->core_cycles + core_cycles);
402 tx_only_begin(portid_t pi)
404 uint16_t pkt_data_len;
407 pkt_data_len = (uint16_t) (tx_pkt_length - (
408 sizeof(struct rte_ether_hdr) +
409 sizeof(struct rte_ipv4_hdr) +
410 sizeof(struct rte_udp_hdr)));
411 setup_pkt_udp_ip_headers(&pkt_ip_hdr, &pkt_udp_hdr, pkt_data_len);
413 timestamp_enable = false;
416 RTE_PER_LCORE(timestamp_qskew) = 0;
417 dynf = rte_mbuf_dynflag_lookup
418 (RTE_MBUF_DYNFLAG_TX_TIMESTAMP_NAME, NULL);
420 timestamp_mask = 1ULL << dynf;
421 dynf = rte_mbuf_dynfield_lookup
422 (RTE_MBUF_DYNFIELD_TIMESTAMP_NAME, NULL);
424 timestamp_off = dynf;
425 timestamp_enable = tx_pkt_times_inter &&
427 timestamp_off >= 0 &&
428 !rte_eth_read_clock(pi, ×tamp_initial[pi]);
431 struct fwd_engine tx_only_engine = {
432 .fwd_mode_name = "txonly",
433 .port_fwd_begin = tx_only_begin,
434 .port_fwd_end = NULL,
435 .packet_fwd = pkt_burst_transmit,