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 #define UDP_SRC_PORT 1024
44 #define UDP_DST_PORT 1024
46 #define IP_SRC_ADDR ((192U << 24) | (168 << 16) | (0 << 8) | 1)
47 #define IP_DST_ADDR ((192U << 24) | (168 << 16) | (0 << 8) | 2)
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)
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. */
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 ipv4_hdr *ip_hdr,
96 struct udp_hdr *udp_hdr,
97 uint16_t pkt_data_len)
104 * Initialize UDP header.
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. */
113 * Initialize IP header.
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);
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 * Transmit a burst of multi-segments packets.
154 pkt_burst_transmit(struct fwd_stream *fs)
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;
164 uint16_t vlan_tci, vlan_tci_outer;
166 uint64_t ol_flags = 0;
168 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
171 uint64_t core_cycles;
173 uint32_t nb_segs, pkt_len;
175 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
176 start_tsc = rte_rdtsc();
179 mbp = current_fwd_lcore()->mbp;
180 txp = &ports[fs->tx_port];
181 vlan_tci = txp->tx_vlan_id;
182 vlan_tci_outer = txp->tx_vlan_id_outer;
183 if (txp->tx_ol_flags & TESTPMD_TX_OFFLOAD_INSERT_VLAN)
184 ol_flags = PKT_TX_VLAN_PKT;
185 if (txp->tx_ol_flags & TESTPMD_TX_OFFLOAD_INSERT_QINQ)
186 ol_flags |= PKT_TX_QINQ_PKT;
187 if (txp->tx_ol_flags & TESTPMD_TX_OFFLOAD_MACSEC)
188 ol_flags |= PKT_TX_MACSEC;
189 for (nb_pkt = 0; nb_pkt < nb_pkt_per_burst; nb_pkt++) {
190 pkt = rte_mbuf_raw_alloc(mbp);
199 * Using raw alloc is good to improve performance,
200 * but some consumers may use the headroom and so
201 * decrement data_off. We need to make sure it is
202 * reset to default value.
204 rte_pktmbuf_reset_headroom(pkt);
205 pkt->data_len = tx_pkt_seg_lengths[0];
207 if (tx_pkt_split == TX_PKT_SPLIT_RND)
208 nb_segs = random() % tx_pkt_nb_segs + 1;
210 nb_segs = tx_pkt_nb_segs;
211 pkt_len = pkt->data_len;
212 for (i = 1; i < nb_segs; i++) {
213 pkt_seg->next = rte_mbuf_raw_alloc(mbp);
214 if (pkt_seg->next == NULL) {
216 rte_pktmbuf_free(pkt);
219 pkt_seg = pkt_seg->next;
220 pkt_seg->data_len = tx_pkt_seg_lengths[i];
221 pkt_len += pkt_seg->data_len;
223 pkt_seg->next = NULL; /* Last segment of packet. */
226 * Initialize Ethernet header.
228 ether_addr_copy(&peer_eth_addrs[fs->peer_addr],ð_hdr.d_addr);
229 ether_addr_copy(&ports[fs->tx_port].eth_addr, ð_hdr.s_addr);
230 eth_hdr.ether_type = rte_cpu_to_be_16(ETHER_TYPE_IPv4);
233 * Copy headers in first packet segment(s).
235 copy_buf_to_pkt(ð_hdr, sizeof(eth_hdr), pkt, 0);
236 copy_buf_to_pkt(&pkt_ip_hdr, sizeof(pkt_ip_hdr), pkt,
237 sizeof(struct ether_hdr));
238 copy_buf_to_pkt(&pkt_udp_hdr, sizeof(pkt_udp_hdr), pkt,
239 sizeof(struct ether_hdr) +
240 sizeof(struct ipv4_hdr));
243 * Complete first mbuf of packet and append it to the
244 * burst of packets to be transmitted.
246 pkt->nb_segs = nb_segs;
247 pkt->pkt_len = pkt_len;
248 pkt->ol_flags = ol_flags;
249 pkt->vlan_tci = vlan_tci;
250 pkt->vlan_tci_outer = vlan_tci_outer;
251 pkt->l2_len = sizeof(struct ether_hdr);
252 pkt->l3_len = sizeof(struct ipv4_hdr);
253 pkts_burst[nb_pkt] = pkt;
255 nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, pkts_burst, nb_pkt);
259 if (unlikely(nb_tx < nb_pkt) && fs->retry_enabled) {
261 while (nb_tx < nb_pkt && retry++ < burst_tx_retry_num) {
262 rte_delay_us(burst_tx_delay_time);
263 nb_tx += rte_eth_tx_burst(fs->tx_port, fs->tx_queue,
264 &pkts_burst[nb_tx], nb_pkt - nb_tx);
267 fs->tx_packets += nb_tx;
269 #ifdef RTE_TEST_PMD_RECORD_BURST_STATS
270 fs->tx_burst_stats.pkt_burst_spread[nb_tx]++;
272 if (unlikely(nb_tx < nb_pkt)) {
273 if (verbose_level > 0 && fs->fwd_dropped == 0)
274 printf("port %d tx_queue %d - drop "
275 "(nb_pkt:%u - nb_tx:%u)=%u packets\n",
276 fs->tx_port, fs->tx_queue,
277 (unsigned) nb_pkt, (unsigned) nb_tx,
278 (unsigned) (nb_pkt - nb_tx));
279 fs->fwd_dropped += (nb_pkt - nb_tx);
281 rte_pktmbuf_free(pkts_burst[nb_tx]);
282 } while (++nb_tx < nb_pkt);
285 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
286 end_tsc = rte_rdtsc();
287 core_cycles = (end_tsc - start_tsc);
288 fs->core_cycles = (uint64_t) (fs->core_cycles + core_cycles);
293 tx_only_begin(__attribute__((unused)) portid_t pi)
295 uint16_t pkt_data_len;
297 pkt_data_len = (uint16_t) (tx_pkt_length - (sizeof(struct ether_hdr) +
298 sizeof(struct ipv4_hdr) +
299 sizeof(struct udp_hdr)));
300 setup_pkt_udp_ip_headers(&pkt_ip_hdr, &pkt_udp_hdr, pkt_data_len);
303 struct fwd_engine tx_only_engine = {
304 .fwd_mode_name = "txonly",
305 .port_fwd_begin = tx_only_begin,
306 .port_fwd_end = NULL,
307 .packet_fwd = pkt_burst_transmit,