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. */
58 copy_buf_to_pkt_segs(void* buf, unsigned len, struct rte_mbuf *pkt,
66 while (offset >= seg->data_len) {
67 offset -= seg->data_len;
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);
75 buf = ((char*) buf + copy_len);
77 seg_buf = rte_pktmbuf_mtod(seg, char *);
78 copy_len = seg->data_len;
80 rte_memcpy(seg_buf, buf, (size_t) len);
84 copy_buf_to_pkt(void* buf, unsigned len, struct rte_mbuf *pkt, unsigned offset)
86 if (offset + len <= pkt->data_len) {
87 rte_memcpy(rte_pktmbuf_mtod_offset(pkt, char *, offset),
91 copy_buf_to_pkt_segs(buf, len, pkt, offset);
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)
104 * Initialize UDP header.
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. */
113 * Initialize IP header.
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);
127 * Compute IP header checksum.
129 ptr16 = (unaligned_uint16_t*) ip_hdr;
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];
138 * Reduce 32 bit checksum to 16 bits and complement it.
140 ip_cksum = ((ip_cksum & 0xFFFF0000) >> 16) +
141 (ip_cksum & 0x0000FFFF);
142 if (ip_cksum > 65535)
144 ip_cksum = (~ip_cksum) & 0x0000FFFF;
147 ip_hdr->hdr_checksum = (uint16_t) ip_cksum;
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)
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;
161 if (unlikely(tx_pkt_split == TX_PKT_SPLIT_RND))
162 nb_segs = rte_rand() % tx_pkt_nb_segs + 1;
164 nb_segs = tx_pkt_nb_segs;
167 if (rte_mempool_get_bulk(mbp, (void **)pkt_segs, nb_segs - 1))
171 rte_pktmbuf_reset_headroom(pkt);
172 pkt->data_len = tx_pkt_seg_lengths[0];
173 pkt->ol_flags &= EXT_ATTACHED_MBUF;
174 pkt->ol_flags |= ol_flags;
175 pkt->vlan_tci = vlan_tci;
176 pkt->vlan_tci_outer = vlan_tci_outer;
177 pkt->l2_len = sizeof(struct rte_ether_hdr);
178 pkt->l3_len = sizeof(struct rte_ipv4_hdr);
180 pkt_len = pkt->data_len;
182 for (i = 1; i < nb_segs; i++) {
183 pkt_seg->next = pkt_segs[i - 1];
184 pkt_seg = pkt_seg->next;
185 pkt_seg->data_len = tx_pkt_seg_lengths[i];
186 pkt_len += pkt_seg->data_len;
188 pkt_seg->next = NULL; /* Last segment of packet. */
190 * Copy headers in first packet segment(s).
192 copy_buf_to_pkt(eth_hdr, sizeof(*eth_hdr), pkt, 0);
193 copy_buf_to_pkt(&pkt_ip_hdr, sizeof(pkt_ip_hdr), pkt,
194 sizeof(struct rte_ether_hdr));
195 if (txonly_multi_flow) {
196 struct rte_ipv4_hdr *ip_hdr;
199 ip_hdr = rte_pktmbuf_mtod_offset(pkt,
200 struct rte_ipv4_hdr *,
201 sizeof(struct rte_ether_hdr));
203 * Generate multiple flows by varying IP src addr. This
204 * enables packets are well distributed by RSS in
205 * receiver side if any and txonly mode can be a decent
206 * packet generator for developer's quick performance
209 addr = (tx_ip_dst_addr | (ip_var++ << 8)) + rte_lcore_id();
210 ip_hdr->src_addr = rte_cpu_to_be_32(addr);
212 copy_buf_to_pkt(&pkt_udp_hdr, sizeof(pkt_udp_hdr), pkt,
213 sizeof(struct rte_ether_hdr) +
214 sizeof(struct rte_ipv4_hdr));
216 * Complete first mbuf of packet and append it to the
217 * burst of packets to be transmitted.
219 pkt->nb_segs = nb_segs;
220 pkt->pkt_len = pkt_len;
226 * Transmit a burst of multi-segments packets.
229 pkt_burst_transmit(struct fwd_stream *fs)
231 struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
232 struct rte_port *txp;
233 struct rte_mbuf *pkt;
234 struct rte_mempool *mbp;
235 struct rte_ether_hdr eth_hdr;
238 uint16_t vlan_tci, vlan_tci_outer;
240 uint64_t ol_flags = 0;
241 uint64_t tx_offloads;
242 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
245 uint64_t core_cycles;
248 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
249 start_tsc = rte_rdtsc();
252 mbp = current_fwd_lcore()->mbp;
253 txp = &ports[fs->tx_port];
254 tx_offloads = txp->dev_conf.txmode.offloads;
255 vlan_tci = txp->tx_vlan_id;
256 vlan_tci_outer = txp->tx_vlan_id_outer;
257 if (tx_offloads & DEV_TX_OFFLOAD_VLAN_INSERT)
258 ol_flags = PKT_TX_VLAN_PKT;
259 if (tx_offloads & DEV_TX_OFFLOAD_QINQ_INSERT)
260 ol_flags |= PKT_TX_QINQ_PKT;
261 if (tx_offloads & DEV_TX_OFFLOAD_MACSEC_INSERT)
262 ol_flags |= PKT_TX_MACSEC;
265 * Initialize Ethernet header.
267 rte_ether_addr_copy(&peer_eth_addrs[fs->peer_addr], ð_hdr.d_addr);
268 rte_ether_addr_copy(&ports[fs->tx_port].eth_addr, ð_hdr.s_addr);
269 eth_hdr.ether_type = rte_cpu_to_be_16(RTE_ETHER_TYPE_IPV4);
271 if (rte_mempool_get_bulk(mbp, (void **)pkts_burst,
272 nb_pkt_per_burst) == 0) {
273 for (nb_pkt = 0; nb_pkt < nb_pkt_per_burst; nb_pkt++) {
274 if (unlikely(!pkt_burst_prepare(pkts_burst[nb_pkt], mbp,
278 rte_mempool_put_bulk(mbp,
279 (void **)&pkts_burst[nb_pkt],
280 nb_pkt_per_burst - nb_pkt);
285 for (nb_pkt = 0; nb_pkt < nb_pkt_per_burst; nb_pkt++) {
286 pkt = rte_mbuf_raw_alloc(mbp);
289 if (unlikely(!pkt_burst_prepare(pkt, mbp, ð_hdr,
293 rte_pktmbuf_free(pkt);
296 pkts_burst[nb_pkt] = pkt;
303 nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, pkts_burst, nb_pkt);
307 if (unlikely(nb_tx < nb_pkt) && fs->retry_enabled) {
309 while (nb_tx < nb_pkt && retry++ < burst_tx_retry_num) {
310 rte_delay_us(burst_tx_delay_time);
311 nb_tx += rte_eth_tx_burst(fs->tx_port, fs->tx_queue,
312 &pkts_burst[nb_tx], nb_pkt - nb_tx);
315 fs->tx_packets += nb_tx;
317 if (txonly_multi_flow)
318 RTE_PER_LCORE(_ip_var) += nb_tx;
320 #ifdef RTE_TEST_PMD_RECORD_BURST_STATS
321 fs->tx_burst_stats.pkt_burst_spread[nb_tx]++;
323 if (unlikely(nb_tx < nb_pkt)) {
324 if (verbose_level > 0 && fs->fwd_dropped == 0)
325 printf("port %d tx_queue %d - drop "
326 "(nb_pkt:%u - nb_tx:%u)=%u packets\n",
327 fs->tx_port, fs->tx_queue,
328 (unsigned) nb_pkt, (unsigned) nb_tx,
329 (unsigned) (nb_pkt - nb_tx));
330 fs->fwd_dropped += (nb_pkt - nb_tx);
332 rte_pktmbuf_free(pkts_burst[nb_tx]);
333 } while (++nb_tx < nb_pkt);
336 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
337 end_tsc = rte_rdtsc();
338 core_cycles = (end_tsc - start_tsc);
339 fs->core_cycles = (uint64_t) (fs->core_cycles + core_cycles);
344 tx_only_begin(__attribute__((unused)) portid_t pi)
346 uint16_t pkt_data_len;
348 pkt_data_len = (uint16_t) (tx_pkt_length - (
349 sizeof(struct rte_ether_hdr) +
350 sizeof(struct rte_ipv4_hdr) +
351 sizeof(struct rte_udp_hdr)));
352 setup_pkt_udp_ip_headers(&pkt_ip_hdr, &pkt_udp_hdr, pkt_data_len);
355 struct fwd_engine tx_only_engine = {
356 .fwd_mode_name = "txonly",
357 .port_fwd_begin = tx_only_begin,
358 .port_fwd_end = NULL,
359 .packet_fwd = pkt_burst_transmit,