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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>
54 #include <rte_tailq.h>
56 #include <rte_per_lcore.h>
57 #include <rte_lcore.h>
58 #include <rte_atomic.h>
59 #include <rte_branch_prediction.h>
61 #include <rte_memory.h>
62 #include <rte_mempool.h>
64 #include <rte_memcpy.h>
65 #include <rte_interrupts.h>
67 #include <rte_ether.h>
68 #include <rte_ethdev.h>
72 #include <rte_string_fns.h>
76 #define UDP_SRC_PORT 1024
77 #define UDP_DST_PORT 1024
79 #define IP_SRC_ADDR ((192U << 24) | (168 << 16) | (0 << 8) | 1)
80 #define IP_DST_ADDR ((192U << 24) | (168 << 16) | (0 << 8) | 2)
82 #define IP_DEFTTL 64 /* from RFC 1340. */
83 #define IP_VERSION 0x40
84 #define IP_HDRLEN 0x05 /* default IP header length == five 32-bits words. */
85 #define IP_VHL_DEF (IP_VERSION | IP_HDRLEN)
87 static struct ipv4_hdr pkt_ip_hdr; /**< IP header of transmitted packets. */
88 static struct udp_hdr pkt_udp_hdr; /**< UDP header of transmitted packets. */
90 static inline struct rte_mbuf *
91 tx_mbuf_alloc(struct rte_mempool *mp)
95 m = __rte_mbuf_raw_alloc(mp);
96 __rte_mbuf_sanity_check_raw(m, RTE_MBUF_PKT, 0);
101 copy_buf_to_pkt_segs(void* buf, unsigned len, struct rte_mbuf *pkt,
104 struct rte_mbuf *seg;
109 while (offset >= seg->pkt.data_len) {
110 offset -= seg->pkt.data_len;
113 copy_len = seg->pkt.data_len - offset;
114 seg_buf = ((char *) seg->pkt.data + offset);
115 while (len > copy_len) {
116 rte_memcpy(seg_buf, buf, (size_t) copy_len);
118 buf = ((char*) buf + copy_len);
120 seg_buf = seg->pkt.data;
122 rte_memcpy(seg_buf, buf, (size_t) len);
126 copy_buf_to_pkt(void* buf, unsigned len, struct rte_mbuf *pkt, unsigned offset)
128 if (offset + len <= pkt->pkt.data_len) {
129 rte_memcpy(((char *) pkt->pkt.data + offset), buf, (size_t) len);
132 copy_buf_to_pkt_segs(buf, len, pkt, offset);
136 setup_pkt_udp_ip_headers(struct ipv4_hdr *ip_hdr,
137 struct udp_hdr *udp_hdr,
138 uint16_t pkt_data_len)
145 * Initialize UDP header.
147 pkt_len = (uint16_t) (pkt_data_len + sizeof(struct udp_hdr));
148 udp_hdr->src_port = rte_cpu_to_be_16(UDP_SRC_PORT);
149 udp_hdr->dst_port = rte_cpu_to_be_16(UDP_DST_PORT);
150 udp_hdr->dgram_len = RTE_CPU_TO_BE_16(pkt_len);
151 udp_hdr->dgram_cksum = 0; /* No UDP checksum. */
154 * Initialize IP header.
156 pkt_len = (uint16_t) (pkt_len + sizeof(struct ipv4_hdr));
157 ip_hdr->version_ihl = IP_VHL_DEF;
158 ip_hdr->type_of_service = 0;
159 ip_hdr->fragment_offset = 0;
160 ip_hdr->time_to_live = IP_DEFTTL;
161 ip_hdr->next_proto_id = IPPROTO_UDP;
162 ip_hdr->packet_id = 0;
163 ip_hdr->total_length = RTE_CPU_TO_BE_16(pkt_len);
164 ip_hdr->src_addr = rte_cpu_to_be_32(IP_SRC_ADDR);
165 ip_hdr->dst_addr = rte_cpu_to_be_32(IP_DST_ADDR);
168 * Compute IP header checksum.
170 ptr16 = (uint16_t*) ip_hdr;
172 ip_cksum += ptr16[0]; ip_cksum += ptr16[1];
173 ip_cksum += ptr16[2]; ip_cksum += ptr16[3];
174 ip_cksum += ptr16[4];
175 ip_cksum += ptr16[6]; ip_cksum += ptr16[7];
176 ip_cksum += ptr16[8]; ip_cksum += ptr16[9];
179 * Reduce 32 bit checksum to 16 bits and complement it.
181 ip_cksum = ((ip_cksum & 0xFFFF0000) >> 16) +
182 (ip_cksum & 0x0000FFFF);
183 if (ip_cksum > 65535)
185 ip_cksum = (~ip_cksum) & 0x0000FFFF;
188 ip_hdr->hdr_checksum = (uint16_t) ip_cksum;
192 * Transmit a burst of multi-segments packets.
195 pkt_burst_transmit(struct fwd_stream *fs)
197 struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
198 struct rte_mbuf *pkt;
199 struct rte_mbuf *pkt_seg;
200 struct rte_mempool *mbp;
201 struct ether_hdr eth_hdr;
207 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
210 uint64_t core_cycles;
213 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
214 start_tsc = rte_rdtsc();
217 mbp = current_fwd_lcore()->mbp;
218 vlan_tci = ports[fs->tx_port].tx_vlan_id;
219 ol_flags = ports[fs->tx_port].tx_ol_flags;
220 for (nb_pkt = 0; nb_pkt < nb_pkt_per_burst; nb_pkt++) {
221 pkt = tx_mbuf_alloc(mbp);
228 pkt->pkt.data_len = tx_pkt_seg_lengths[0];
230 for (i = 1; i < tx_pkt_nb_segs; i++) {
231 pkt_seg->pkt.next = tx_mbuf_alloc(mbp);
232 if (pkt_seg->pkt.next == NULL) {
233 pkt->pkt.nb_segs = i;
234 rte_pktmbuf_free(pkt);
237 pkt_seg = pkt_seg->pkt.next;
238 pkt_seg->pkt.data_len = tx_pkt_seg_lengths[i];
240 pkt_seg->pkt.next = NULL; /* Last segment of packet. */
243 * Initialize Ethernet header.
245 ether_addr_copy(&peer_eth_addrs[fs->peer_addr],ð_hdr.d_addr);
246 ether_addr_copy(&ports[fs->tx_port].eth_addr, ð_hdr.s_addr);
247 eth_hdr.ether_type = rte_cpu_to_be_16(ETHER_TYPE_IPv4);
250 * Copy headers in first packet segment(s).
252 copy_buf_to_pkt(ð_hdr, sizeof(eth_hdr), pkt, 0);
253 copy_buf_to_pkt(&pkt_ip_hdr, sizeof(pkt_ip_hdr), pkt,
254 sizeof(struct ether_hdr));
255 copy_buf_to_pkt(&pkt_udp_hdr, sizeof(pkt_udp_hdr), pkt,
256 sizeof(struct ether_hdr) +
257 sizeof(struct ipv4_hdr));
260 * Complete first mbuf of packet and append it to the
261 * burst of packets to be transmitted.
263 pkt->pkt.nb_segs = tx_pkt_nb_segs;
264 pkt->pkt.pkt_len = tx_pkt_length;
265 pkt->ol_flags = ol_flags;
266 pkt->pkt.vlan_macip.f.vlan_tci = vlan_tci;
267 pkt->pkt.vlan_macip.f.l2_len = sizeof(struct ether_hdr);
268 pkt->pkt.vlan_macip.f.l3_len = sizeof(struct ipv4_hdr);
269 pkts_burst[nb_pkt] = pkt;
271 nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, pkts_burst, nb_pkt);
272 fs->tx_packets += nb_tx;
274 #ifdef RTE_TEST_PMD_RECORD_BURST_STATS
275 fs->tx_burst_stats.pkt_burst_spread[nb_tx]++;
277 if (unlikely(nb_tx < nb_pkt)) {
278 if (verbose_level > 0 && fs->fwd_dropped == 0)
279 printf("port %d tx_queue %d - drop "
280 "(nb_pkt:%u - nb_tx:%u)=%u packets\n",
281 fs->tx_port, fs->tx_queue,
282 (unsigned) nb_pkt, (unsigned) nb_tx,
283 (unsigned) (nb_pkt - nb_tx));
284 fs->fwd_dropped += (nb_pkt - nb_tx);
286 rte_pktmbuf_free(pkts_burst[nb_tx]);
287 } while (++nb_tx < nb_pkt);
290 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
291 end_tsc = rte_rdtsc();
292 core_cycles = (end_tsc - start_tsc);
293 fs->core_cycles = (uint64_t) (fs->core_cycles + core_cycles);
298 tx_only_begin(__attribute__((unused)) portid_t pi)
300 uint16_t pkt_data_len;
302 pkt_data_len = (uint16_t) (tx_pkt_length - (sizeof(struct ether_hdr) +
303 sizeof(struct ipv4_hdr) +
304 sizeof(struct udp_hdr)));
305 setup_pkt_udp_ip_headers(&pkt_ip_hdr, &pkt_udp_hdr, pkt_data_len);
308 struct fwd_engine tx_only_engine = {
309 .fwd_mode_name = "txonly",
310 .port_fwd_begin = tx_only_begin,
311 .port_fwd_end = NULL,
312 .packet_fwd = pkt_burst_transmit,