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42 #include <sys/queue.h>
45 #include <rte_common.h>
46 #include <rte_byteorder.h>
48 #include <rte_debug.h>
49 #include <rte_cycles.h>
50 #include <rte_memory.h>
51 #include <rte_memcpy.h>
52 #include <rte_launch.h>
54 #include <rte_per_lcore.h>
55 #include <rte_lcore.h>
56 #include <rte_atomic.h>
57 #include <rte_branch_prediction.h>
58 #include <rte_mempool.h>
60 #include <rte_interrupts.h>
62 #include <rte_ether.h>
63 #include <rte_ethdev.h>
67 #include <rte_string_fns.h>
72 #define UDP_SRC_PORT 1024
73 #define UDP_DST_PORT 1024
75 #define IP_SRC_ADDR ((192U << 24) | (168 << 16) | (0 << 8) | 1)
76 #define IP_DST_ADDR ((192U << 24) | (168 << 16) | (0 << 8) | 2)
78 #define IP_DEFTTL 64 /* from RFC 1340. */
79 #define IP_VERSION 0x40
80 #define IP_HDRLEN 0x05 /* default IP header length == five 32-bits words. */
81 #define IP_VHL_DEF (IP_VERSION | IP_HDRLEN)
83 static struct ipv4_hdr pkt_ip_hdr; /**< IP header of transmitted packets. */
84 static struct udp_hdr pkt_udp_hdr; /**< UDP header of transmitted packets. */
87 copy_buf_to_pkt_segs(void* buf, unsigned len, struct rte_mbuf *pkt,
95 while (offset >= seg->data_len) {
96 offset -= seg->data_len;
99 copy_len = seg->data_len - offset;
100 seg_buf = rte_pktmbuf_mtod_offset(seg, char *, offset);
101 while (len > copy_len) {
102 rte_memcpy(seg_buf, buf, (size_t) copy_len);
104 buf = ((char*) buf + copy_len);
106 seg_buf = rte_pktmbuf_mtod(seg, char *);
108 rte_memcpy(seg_buf, buf, (size_t) len);
112 copy_buf_to_pkt(void* buf, unsigned len, struct rte_mbuf *pkt, unsigned offset)
114 if (offset + len <= pkt->data_len) {
115 rte_memcpy(rte_pktmbuf_mtod_offset(pkt, char *, offset),
119 copy_buf_to_pkt_segs(buf, len, pkt, offset);
123 setup_pkt_udp_ip_headers(struct ipv4_hdr *ip_hdr,
124 struct udp_hdr *udp_hdr,
125 uint16_t pkt_data_len)
132 * Initialize UDP header.
134 pkt_len = (uint16_t) (pkt_data_len + sizeof(struct udp_hdr));
135 udp_hdr->src_port = rte_cpu_to_be_16(UDP_SRC_PORT);
136 udp_hdr->dst_port = rte_cpu_to_be_16(UDP_DST_PORT);
137 udp_hdr->dgram_len = RTE_CPU_TO_BE_16(pkt_len);
138 udp_hdr->dgram_cksum = 0; /* No UDP checksum. */
141 * Initialize IP header.
143 pkt_len = (uint16_t) (pkt_len + sizeof(struct ipv4_hdr));
144 ip_hdr->version_ihl = IP_VHL_DEF;
145 ip_hdr->type_of_service = 0;
146 ip_hdr->fragment_offset = 0;
147 ip_hdr->time_to_live = IP_DEFTTL;
148 ip_hdr->next_proto_id = IPPROTO_UDP;
149 ip_hdr->packet_id = 0;
150 ip_hdr->total_length = RTE_CPU_TO_BE_16(pkt_len);
151 ip_hdr->src_addr = rte_cpu_to_be_32(IP_SRC_ADDR);
152 ip_hdr->dst_addr = rte_cpu_to_be_32(IP_DST_ADDR);
155 * Compute IP header checksum.
157 ptr16 = (unaligned_uint16_t*) ip_hdr;
159 ip_cksum += ptr16[0]; ip_cksum += ptr16[1];
160 ip_cksum += ptr16[2]; ip_cksum += ptr16[3];
161 ip_cksum += ptr16[4];
162 ip_cksum += ptr16[6]; ip_cksum += ptr16[7];
163 ip_cksum += ptr16[8]; ip_cksum += ptr16[9];
166 * Reduce 32 bit checksum to 16 bits and complement it.
168 ip_cksum = ((ip_cksum & 0xFFFF0000) >> 16) +
169 (ip_cksum & 0x0000FFFF);
170 if (ip_cksum > 65535)
172 ip_cksum = (~ip_cksum) & 0x0000FFFF;
175 ip_hdr->hdr_checksum = (uint16_t) ip_cksum;
179 * Transmit a burst of multi-segments packets.
182 pkt_burst_transmit(struct fwd_stream *fs)
184 struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
185 struct rte_port *txp;
186 struct rte_mbuf *pkt;
187 struct rte_mbuf *pkt_seg;
188 struct rte_mempool *mbp;
189 struct ether_hdr eth_hdr;
192 uint16_t vlan_tci, vlan_tci_outer;
194 uint64_t ol_flags = 0;
196 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
199 uint64_t core_cycles;
201 uint32_t nb_segs, pkt_len;
203 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
204 start_tsc = rte_rdtsc();
207 mbp = current_fwd_lcore()->mbp;
208 txp = &ports[fs->tx_port];
209 vlan_tci = txp->tx_vlan_id;
210 vlan_tci_outer = txp->tx_vlan_id_outer;
211 if (txp->tx_ol_flags & TESTPMD_TX_OFFLOAD_INSERT_VLAN)
212 ol_flags = PKT_TX_VLAN_PKT;
213 if (txp->tx_ol_flags & TESTPMD_TX_OFFLOAD_INSERT_QINQ)
214 ol_flags |= PKT_TX_QINQ_PKT;
215 if (txp->tx_ol_flags & TESTPMD_TX_OFFLOAD_MACSEC)
216 ol_flags |= PKT_TX_MACSEC;
217 for (nb_pkt = 0; nb_pkt < nb_pkt_per_burst; nb_pkt++) {
218 pkt = rte_mbuf_raw_alloc(mbp);
227 * Using raw alloc is good to improve performance,
228 * but some consumers may use the headroom and so
229 * decrement data_off. We need to make sure it is
230 * reset to default value.
232 rte_pktmbuf_reset_headroom(pkt);
233 pkt->data_len = tx_pkt_seg_lengths[0];
235 if (tx_pkt_split == TX_PKT_SPLIT_RND)
236 nb_segs = random() % tx_pkt_nb_segs + 1;
238 nb_segs = tx_pkt_nb_segs;
239 pkt_len = pkt->data_len;
240 for (i = 1; i < nb_segs; i++) {
241 pkt_seg->next = rte_mbuf_raw_alloc(mbp);
242 if (pkt_seg->next == NULL) {
244 rte_pktmbuf_free(pkt);
247 pkt_seg = pkt_seg->next;
248 pkt_seg->data_len = tx_pkt_seg_lengths[i];
249 pkt_len += pkt_seg->data_len;
251 pkt_seg->next = NULL; /* Last segment of packet. */
254 * Initialize Ethernet header.
256 ether_addr_copy(&peer_eth_addrs[fs->peer_addr],ð_hdr.d_addr);
257 ether_addr_copy(&ports[fs->tx_port].eth_addr, ð_hdr.s_addr);
258 eth_hdr.ether_type = rte_cpu_to_be_16(ETHER_TYPE_IPv4);
261 * Copy headers in first packet segment(s).
263 copy_buf_to_pkt(ð_hdr, sizeof(eth_hdr), pkt, 0);
264 copy_buf_to_pkt(&pkt_ip_hdr, sizeof(pkt_ip_hdr), pkt,
265 sizeof(struct ether_hdr));
266 copy_buf_to_pkt(&pkt_udp_hdr, sizeof(pkt_udp_hdr), pkt,
267 sizeof(struct ether_hdr) +
268 sizeof(struct ipv4_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;
276 pkt->ol_flags = ol_flags;
277 pkt->vlan_tci = vlan_tci;
278 pkt->vlan_tci_outer = vlan_tci_outer;
279 pkt->l2_len = sizeof(struct ether_hdr);
280 pkt->l3_len = sizeof(struct ipv4_hdr);
281 pkts_burst[nb_pkt] = pkt;
283 nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, pkts_burst, nb_pkt);
287 if (unlikely(nb_tx < nb_pkt) && fs->retry_enabled) {
289 while (nb_tx < nb_pkt && retry++ < burst_tx_retry_num) {
290 rte_delay_us(burst_tx_delay_time);
291 nb_tx += rte_eth_tx_burst(fs->tx_port, fs->tx_queue,
292 &pkts_burst[nb_tx], nb_pkt - nb_tx);
295 fs->tx_packets += nb_tx;
297 #ifdef RTE_TEST_PMD_RECORD_BURST_STATS
298 fs->tx_burst_stats.pkt_burst_spread[nb_tx]++;
300 if (unlikely(nb_tx < nb_pkt)) {
301 if (verbose_level > 0 && fs->fwd_dropped == 0)
302 printf("port %d tx_queue %d - drop "
303 "(nb_pkt:%u - nb_tx:%u)=%u packets\n",
304 fs->tx_port, fs->tx_queue,
305 (unsigned) nb_pkt, (unsigned) nb_tx,
306 (unsigned) (nb_pkt - nb_tx));
307 fs->fwd_dropped += (nb_pkt - nb_tx);
309 rte_pktmbuf_free(pkts_burst[nb_tx]);
310 } while (++nb_tx < nb_pkt);
313 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
314 end_tsc = rte_rdtsc();
315 core_cycles = (end_tsc - start_tsc);
316 fs->core_cycles = (uint64_t) (fs->core_cycles + core_cycles);
321 tx_only_begin(__attribute__((unused)) portid_t pi)
323 uint16_t pkt_data_len;
325 pkt_data_len = (uint16_t) (tx_pkt_length - (sizeof(struct ether_hdr) +
326 sizeof(struct ipv4_hdr) +
327 sizeof(struct udp_hdr)));
328 setup_pkt_udp_ip_headers(&pkt_ip_hdr, &pkt_udp_hdr, pkt_data_len);
331 struct fwd_engine tx_only_engine = {
332 .fwd_mode_name = "txonly",
333 .port_fwd_begin = tx_only_begin,
334 .port_fwd_end = NULL,
335 .packet_fwd = pkt_burst_transmit,