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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>
60 #include <rte_memory.h>
61 #include <rte_mempool.h>
63 #include <rte_memcpy.h>
64 #include <rte_interrupts.h>
66 #include <rte_ether.h>
67 #include <rte_ethdev.h>
71 #include <rte_string_fns.h>
75 #define UDP_SRC_PORT 1024
76 #define UDP_DST_PORT 1024
78 #define IP_SRC_ADDR ((192U << 24) | (168 << 16) | (0 << 8) | 1)
79 #define IP_DST_ADDR ((192U << 24) | (168 << 16) | (0 << 8) | 2)
81 #define IP_DEFTTL 64 /* from RFC 1340. */
82 #define IP_VERSION 0x40
83 #define IP_HDRLEN 0x05 /* default IP header length == five 32-bits words. */
84 #define IP_VHL_DEF (IP_VERSION | IP_HDRLEN)
86 static struct ipv4_hdr pkt_ip_hdr; /**< IP header of transmitted packets. */
87 static struct udp_hdr pkt_udp_hdr; /**< UDP header of transmitted packets. */
90 copy_buf_to_pkt_segs(void* buf, unsigned len, struct rte_mbuf *pkt,
98 while (offset >= seg->data_len) {
99 offset -= seg->data_len;
102 copy_len = seg->data_len - offset;
103 seg_buf = rte_pktmbuf_mtod_offset(seg, char *, offset);
104 while (len > copy_len) {
105 rte_memcpy(seg_buf, buf, (size_t) copy_len);
107 buf = ((char*) buf + copy_len);
109 seg_buf = rte_pktmbuf_mtod(seg, char *);
111 rte_memcpy(seg_buf, buf, (size_t) len);
115 copy_buf_to_pkt(void* buf, unsigned len, struct rte_mbuf *pkt, unsigned offset)
117 if (offset + len <= pkt->data_len) {
118 rte_memcpy(rte_pktmbuf_mtod_offset(pkt, char *, offset),
122 copy_buf_to_pkt_segs(buf, len, pkt, offset);
126 setup_pkt_udp_ip_headers(struct ipv4_hdr *ip_hdr,
127 struct udp_hdr *udp_hdr,
128 uint16_t pkt_data_len)
135 * Initialize UDP header.
137 pkt_len = (uint16_t) (pkt_data_len + sizeof(struct udp_hdr));
138 udp_hdr->src_port = rte_cpu_to_be_16(UDP_SRC_PORT);
139 udp_hdr->dst_port = rte_cpu_to_be_16(UDP_DST_PORT);
140 udp_hdr->dgram_len = RTE_CPU_TO_BE_16(pkt_len);
141 udp_hdr->dgram_cksum = 0; /* No UDP checksum. */
144 * Initialize IP header.
146 pkt_len = (uint16_t) (pkt_len + sizeof(struct ipv4_hdr));
147 ip_hdr->version_ihl = IP_VHL_DEF;
148 ip_hdr->type_of_service = 0;
149 ip_hdr->fragment_offset = 0;
150 ip_hdr->time_to_live = IP_DEFTTL;
151 ip_hdr->next_proto_id = IPPROTO_UDP;
152 ip_hdr->packet_id = 0;
153 ip_hdr->total_length = RTE_CPU_TO_BE_16(pkt_len);
154 ip_hdr->src_addr = rte_cpu_to_be_32(IP_SRC_ADDR);
155 ip_hdr->dst_addr = rte_cpu_to_be_32(IP_DST_ADDR);
158 * Compute IP header checksum.
160 ptr16 = (unaligned_uint16_t*) ip_hdr;
162 ip_cksum += ptr16[0]; ip_cksum += ptr16[1];
163 ip_cksum += ptr16[2]; ip_cksum += ptr16[3];
164 ip_cksum += ptr16[4];
165 ip_cksum += ptr16[6]; ip_cksum += ptr16[7];
166 ip_cksum += ptr16[8]; ip_cksum += ptr16[9];
169 * Reduce 32 bit checksum to 16 bits and complement it.
171 ip_cksum = ((ip_cksum & 0xFFFF0000) >> 16) +
172 (ip_cksum & 0x0000FFFF);
173 if (ip_cksum > 65535)
175 ip_cksum = (~ip_cksum) & 0x0000FFFF;
178 ip_hdr->hdr_checksum = (uint16_t) ip_cksum;
182 * Transmit a burst of multi-segments packets.
185 pkt_burst_transmit(struct fwd_stream *fs)
187 struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
188 struct rte_port *txp;
189 struct rte_mbuf *pkt;
190 struct rte_mbuf *pkt_seg;
191 struct rte_mempool *mbp;
192 struct ether_hdr eth_hdr;
195 uint16_t vlan_tci, vlan_tci_outer;
197 uint64_t ol_flags = 0;
199 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
202 uint64_t core_cycles;
204 uint32_t nb_segs, pkt_len;
206 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
207 start_tsc = rte_rdtsc();
210 mbp = current_fwd_lcore()->mbp;
211 txp = &ports[fs->tx_port];
212 vlan_tci = txp->tx_vlan_id;
213 vlan_tci_outer = txp->tx_vlan_id_outer;
214 if (txp->tx_ol_flags & TESTPMD_TX_OFFLOAD_INSERT_VLAN)
215 ol_flags = PKT_TX_VLAN_PKT;
216 if (txp->tx_ol_flags & TESTPMD_TX_OFFLOAD_INSERT_QINQ)
217 ol_flags |= PKT_TX_QINQ_PKT;
218 for (nb_pkt = 0; nb_pkt < nb_pkt_per_burst; nb_pkt++) {
219 pkt = rte_mbuf_raw_alloc(mbp);
226 pkt->data_len = tx_pkt_seg_lengths[0];
228 if (tx_pkt_split == TX_PKT_SPLIT_RND)
229 nb_segs = random() % tx_pkt_nb_segs + 1;
231 nb_segs = tx_pkt_nb_segs;
232 pkt_len = pkt->data_len;
233 for (i = 1; i < nb_segs; i++) {
234 pkt_seg->next = rte_mbuf_raw_alloc(mbp);
235 if (pkt_seg->next == NULL) {
237 rte_pktmbuf_free(pkt);
240 pkt_seg = pkt_seg->next;
241 pkt_seg->data_len = tx_pkt_seg_lengths[i];
242 pkt_len += pkt_seg->data_len;
244 pkt_seg->next = NULL; /* Last segment of packet. */
247 * Initialize Ethernet header.
249 ether_addr_copy(&peer_eth_addrs[fs->peer_addr],ð_hdr.d_addr);
250 ether_addr_copy(&ports[fs->tx_port].eth_addr, ð_hdr.s_addr);
251 eth_hdr.ether_type = rte_cpu_to_be_16(ETHER_TYPE_IPv4);
254 * Copy headers in first packet segment(s).
256 copy_buf_to_pkt(ð_hdr, sizeof(eth_hdr), pkt, 0);
257 copy_buf_to_pkt(&pkt_ip_hdr, sizeof(pkt_ip_hdr), pkt,
258 sizeof(struct ether_hdr));
259 copy_buf_to_pkt(&pkt_udp_hdr, sizeof(pkt_udp_hdr), pkt,
260 sizeof(struct ether_hdr) +
261 sizeof(struct ipv4_hdr));
264 * Complete first mbuf of packet and append it to the
265 * burst of packets to be transmitted.
267 pkt->nb_segs = nb_segs;
268 pkt->pkt_len = pkt_len;
269 pkt->ol_flags = ol_flags;
270 pkt->vlan_tci = vlan_tci;
271 pkt->vlan_tci_outer = vlan_tci_outer;
272 pkt->l2_len = sizeof(struct ether_hdr);
273 pkt->l3_len = sizeof(struct ipv4_hdr);
274 pkts_burst[nb_pkt] = pkt;
276 nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, pkts_burst, nb_pkt);
280 if (unlikely(nb_tx < nb_pkt) && fs->retry_enabled) {
282 while (nb_tx < nb_pkt && retry++ < burst_tx_retry_num) {
283 rte_delay_us(burst_tx_delay_time);
284 nb_tx += rte_eth_tx_burst(fs->tx_port, fs->tx_queue,
285 &pkts_burst[nb_tx], nb_pkt - nb_tx);
288 fs->tx_packets += nb_tx;
290 #ifdef RTE_TEST_PMD_RECORD_BURST_STATS
291 fs->tx_burst_stats.pkt_burst_spread[nb_tx]++;
293 if (unlikely(nb_tx < nb_pkt)) {
294 if (verbose_level > 0 && fs->fwd_dropped == 0)
295 printf("port %d tx_queue %d - drop "
296 "(nb_pkt:%u - nb_tx:%u)=%u packets\n",
297 fs->tx_port, fs->tx_queue,
298 (unsigned) nb_pkt, (unsigned) nb_tx,
299 (unsigned) (nb_pkt - nb_tx));
300 fs->fwd_dropped += (nb_pkt - nb_tx);
302 rte_pktmbuf_free(pkts_burst[nb_tx]);
303 } while (++nb_tx < nb_pkt);
306 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
307 end_tsc = rte_rdtsc();
308 core_cycles = (end_tsc - start_tsc);
309 fs->core_cycles = (uint64_t) (fs->core_cycles + core_cycles);
314 tx_only_begin(__attribute__((unused)) portid_t pi)
316 uint16_t pkt_data_len;
318 pkt_data_len = (uint16_t) (tx_pkt_length - (sizeof(struct ether_hdr) +
319 sizeof(struct ipv4_hdr) +
320 sizeof(struct udp_hdr)));
321 setup_pkt_udp_ip_headers(&pkt_ip_hdr, &pkt_udp_hdr, pkt_data_len);
324 struct fwd_engine tx_only_engine = {
325 .fwd_mode_name = "txonly",
326 .port_fwd_begin = tx_only_begin,
327 .port_fwd_end = NULL,
328 .packet_fwd = pkt_burst_transmit,