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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_memzone.h>
53 #include <rte_launch.h>
55 #include <rte_per_lcore.h>
56 #include <rte_lcore.h>
57 #include <rte_atomic.h>
58 #include <rte_branch_prediction.h>
59 #include <rte_memory.h>
60 #include <rte_mempool.h>
62 #include <rte_memcpy.h>
63 #include <rte_interrupts.h>
65 #include <rte_ether.h>
66 #include <rte_ethdev.h>
70 #include <rte_string_fns.h>
74 #define UDP_SRC_PORT 1024
75 #define UDP_DST_PORT 1024
77 #define IP_SRC_ADDR ((192U << 24) | (168 << 16) | (0 << 8) | 1)
78 #define IP_DST_ADDR ((192U << 24) | (168 << 16) | (0 << 8) | 2)
80 #define IP_DEFTTL 64 /* from RFC 1340. */
81 #define IP_VERSION 0x40
82 #define IP_HDRLEN 0x05 /* default IP header length == five 32-bits words. */
83 #define IP_VHL_DEF (IP_VERSION | IP_HDRLEN)
85 static struct ipv4_hdr pkt_ip_hdr; /**< IP header of transmitted packets. */
86 static struct udp_hdr pkt_udp_hdr; /**< UDP header of transmitted packets. */
89 copy_buf_to_pkt_segs(void* buf, unsigned len, struct rte_mbuf *pkt,
97 while (offset >= seg->data_len) {
98 offset -= seg->data_len;
101 copy_len = seg->data_len - offset;
102 seg_buf = rte_pktmbuf_mtod_offset(seg, char *, offset);
103 while (len > copy_len) {
104 rte_memcpy(seg_buf, buf, (size_t) copy_len);
106 buf = ((char*) buf + copy_len);
108 seg_buf = rte_pktmbuf_mtod(seg, char *);
110 rte_memcpy(seg_buf, buf, (size_t) len);
114 copy_buf_to_pkt(void* buf, unsigned len, struct rte_mbuf *pkt, unsigned offset)
116 if (offset + len <= pkt->data_len) {
117 rte_memcpy(rte_pktmbuf_mtod_offset(pkt, char *, offset),
121 copy_buf_to_pkt_segs(buf, len, pkt, offset);
125 setup_pkt_udp_ip_headers(struct ipv4_hdr *ip_hdr,
126 struct udp_hdr *udp_hdr,
127 uint16_t pkt_data_len)
134 * Initialize UDP header.
136 pkt_len = (uint16_t) (pkt_data_len + sizeof(struct udp_hdr));
137 udp_hdr->src_port = rte_cpu_to_be_16(UDP_SRC_PORT);
138 udp_hdr->dst_port = rte_cpu_to_be_16(UDP_DST_PORT);
139 udp_hdr->dgram_len = RTE_CPU_TO_BE_16(pkt_len);
140 udp_hdr->dgram_cksum = 0; /* No UDP checksum. */
143 * Initialize IP header.
145 pkt_len = (uint16_t) (pkt_len + sizeof(struct ipv4_hdr));
146 ip_hdr->version_ihl = IP_VHL_DEF;
147 ip_hdr->type_of_service = 0;
148 ip_hdr->fragment_offset = 0;
149 ip_hdr->time_to_live = IP_DEFTTL;
150 ip_hdr->next_proto_id = IPPROTO_UDP;
151 ip_hdr->packet_id = 0;
152 ip_hdr->total_length = RTE_CPU_TO_BE_16(pkt_len);
153 ip_hdr->src_addr = rte_cpu_to_be_32(IP_SRC_ADDR);
154 ip_hdr->dst_addr = rte_cpu_to_be_32(IP_DST_ADDR);
157 * Compute IP header checksum.
159 ptr16 = (unaligned_uint16_t*) ip_hdr;
161 ip_cksum += ptr16[0]; ip_cksum += ptr16[1];
162 ip_cksum += ptr16[2]; ip_cksum += ptr16[3];
163 ip_cksum += ptr16[4];
164 ip_cksum += ptr16[6]; ip_cksum += ptr16[7];
165 ip_cksum += ptr16[8]; ip_cksum += ptr16[9];
168 * Reduce 32 bit checksum to 16 bits and complement it.
170 ip_cksum = ((ip_cksum & 0xFFFF0000) >> 16) +
171 (ip_cksum & 0x0000FFFF);
172 if (ip_cksum > 65535)
174 ip_cksum = (~ip_cksum) & 0x0000FFFF;
177 ip_hdr->hdr_checksum = (uint16_t) ip_cksum;
181 * Transmit a burst of multi-segments packets.
184 pkt_burst_transmit(struct fwd_stream *fs)
186 struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
187 struct rte_port *txp;
188 struct rte_mbuf *pkt;
189 struct rte_mbuf *pkt_seg;
190 struct rte_mempool *mbp;
191 struct ether_hdr eth_hdr;
194 uint16_t vlan_tci, vlan_tci_outer;
196 uint64_t ol_flags = 0;
198 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
201 uint64_t core_cycles;
203 uint32_t nb_segs, pkt_len;
205 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
206 start_tsc = rte_rdtsc();
209 mbp = current_fwd_lcore()->mbp;
210 txp = &ports[fs->tx_port];
211 vlan_tci = txp->tx_vlan_id;
212 vlan_tci_outer = txp->tx_vlan_id_outer;
213 if (txp->tx_ol_flags & TESTPMD_TX_OFFLOAD_INSERT_VLAN)
214 ol_flags = PKT_TX_VLAN_PKT;
215 if (txp->tx_ol_flags & TESTPMD_TX_OFFLOAD_INSERT_QINQ)
216 ol_flags |= PKT_TX_QINQ_PKT;
217 for (nb_pkt = 0; nb_pkt < nb_pkt_per_burst; nb_pkt++) {
218 pkt = rte_mbuf_raw_alloc(mbp);
225 pkt->data_len = tx_pkt_seg_lengths[0];
227 if (tx_pkt_split == TX_PKT_SPLIT_RND)
228 nb_segs = random() % tx_pkt_nb_segs + 1;
230 nb_segs = tx_pkt_nb_segs;
231 pkt_len = pkt->data_len;
232 for (i = 1; i < nb_segs; i++) {
233 pkt_seg->next = rte_mbuf_raw_alloc(mbp);
234 if (pkt_seg->next == NULL) {
236 rte_pktmbuf_free(pkt);
239 pkt_seg = pkt_seg->next;
240 pkt_seg->data_len = tx_pkt_seg_lengths[i];
241 pkt_len += pkt_seg->data_len;
243 pkt_seg->next = NULL; /* Last segment of packet. */
246 * Initialize Ethernet header.
248 ether_addr_copy(&peer_eth_addrs[fs->peer_addr],ð_hdr.d_addr);
249 ether_addr_copy(&ports[fs->tx_port].eth_addr, ð_hdr.s_addr);
250 eth_hdr.ether_type = rte_cpu_to_be_16(ETHER_TYPE_IPv4);
253 * Copy headers in first packet segment(s).
255 copy_buf_to_pkt(ð_hdr, sizeof(eth_hdr), pkt, 0);
256 copy_buf_to_pkt(&pkt_ip_hdr, sizeof(pkt_ip_hdr), pkt,
257 sizeof(struct ether_hdr));
258 copy_buf_to_pkt(&pkt_udp_hdr, sizeof(pkt_udp_hdr), pkt,
259 sizeof(struct ether_hdr) +
260 sizeof(struct ipv4_hdr));
263 * Complete first mbuf of packet and append it to the
264 * burst of packets to be transmitted.
266 pkt->nb_segs = nb_segs;
267 pkt->pkt_len = pkt_len;
268 pkt->ol_flags = ol_flags;
269 pkt->vlan_tci = vlan_tci;
270 pkt->vlan_tci_outer = vlan_tci_outer;
271 pkt->l2_len = sizeof(struct ether_hdr);
272 pkt->l3_len = sizeof(struct ipv4_hdr);
273 pkts_burst[nb_pkt] = pkt;
275 nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, pkts_burst, nb_pkt);
279 if (unlikely(nb_tx < nb_pkt) && fs->retry_enabled) {
281 while (nb_tx < nb_pkt && retry++ < burst_tx_retry_num) {
282 rte_delay_us(burst_tx_delay_time);
283 nb_tx += rte_eth_tx_burst(fs->tx_port, fs->tx_queue,
284 &pkts_burst[nb_tx], nb_pkt - nb_tx);
287 fs->tx_packets += nb_tx;
289 #ifdef RTE_TEST_PMD_RECORD_BURST_STATS
290 fs->tx_burst_stats.pkt_burst_spread[nb_tx]++;
292 if (unlikely(nb_tx < nb_pkt)) {
293 if (verbose_level > 0 && fs->fwd_dropped == 0)
294 printf("port %d tx_queue %d - drop "
295 "(nb_pkt:%u - nb_tx:%u)=%u packets\n",
296 fs->tx_port, fs->tx_queue,
297 (unsigned) nb_pkt, (unsigned) nb_tx,
298 (unsigned) (nb_pkt - nb_tx));
299 fs->fwd_dropped += (nb_pkt - nb_tx);
301 rte_pktmbuf_free(pkts_burst[nb_tx]);
302 } while (++nb_tx < nb_pkt);
305 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
306 end_tsc = rte_rdtsc();
307 core_cycles = (end_tsc - start_tsc);
308 fs->core_cycles = (uint64_t) (fs->core_cycles + core_cycles);
313 tx_only_begin(__attribute__((unused)) portid_t pi)
315 uint16_t pkt_data_len;
317 pkt_data_len = (uint16_t) (tx_pkt_length - (sizeof(struct ether_hdr) +
318 sizeof(struct ipv4_hdr) +
319 sizeof(struct udp_hdr)));
320 setup_pkt_udp_ip_headers(&pkt_ip_hdr, &pkt_udp_hdr, pkt_data_len);
323 struct fwd_engine tx_only_engine = {
324 .fwd_mode_name = "txonly",
325 .port_fwd_begin = tx_only_begin,
326 .port_fwd_end = NULL,
327 .packet_fwd = pkt_burst_transmit,