4 * Copyright(c) 2010-2012 Intel Corporation. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * * Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * * Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
17 * * Neither the name of Intel Corporation nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
25 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 * version: DPDK.L.1.2.3-3
44 #include <sys/queue.h>
47 #include <rte_common.h>
48 #include <rte_byteorder.h>
50 #include <rte_debug.h>
51 #include <rte_cycles.h>
52 #include <rte_memory.h>
53 #include <rte_memcpy.h>
54 #include <rte_memzone.h>
55 #include <rte_launch.h>
56 #include <rte_tailq.h>
58 #include <rte_per_lcore.h>
59 #include <rte_lcore.h>
60 #include <rte_atomic.h>
61 #include <rte_branch_prediction.h>
63 #include <rte_memory.h>
64 #include <rte_mempool.h>
66 #include <rte_memcpy.h>
67 #include <rte_interrupts.h>
69 #include <rte_ether.h>
70 #include <rte_ethdev.h>
74 #include <rte_string_fns.h>
78 #define UDP_SRC_PORT 1024
79 #define UDP_DST_PORT 1024
81 #define IP_SRC_ADDR ((192 << 24) | (168 << 16) | (0 << 8) | 1)
82 #define IP_DST_ADDR ((192 << 24) | (168 << 16) | (0 << 8) | 2)
84 #define IP_DEFTTL 64 /* from RFC 1340. */
85 #define IP_VERSION 0x40
86 #define IP_HDRLEN 0x05 /* default IP header length == five 32-bits words. */
87 #define IP_VHL_DEF (IP_VERSION | IP_HDRLEN)
89 static struct ipv4_hdr pkt_ip_hdr; /**< IP header of transmitted packets. */
90 static struct udp_hdr pkt_udp_hdr; /**< UDP header of transmitted packets. */
92 static inline struct rte_mbuf *
93 tx_mbuf_alloc(struct rte_mempool *mp)
98 if (rte_mempool_get(mp, &mb) < 0)
100 m = (struct rte_mbuf *)mb;
101 __rte_mbuf_sanity_check(m, RTE_MBUF_PKT, 1);
106 copy_buf_to_pkt_segs(void* buf, unsigned len, struct rte_mbuf *pkt,
109 struct rte_mbuf *seg;
114 while (offset >= seg->pkt.data_len) {
115 offset -= seg->pkt.data_len;
118 copy_len = seg->pkt.data_len - offset;
119 seg_buf = ((char *) seg->pkt.data + offset);
120 while (len > copy_len) {
121 rte_memcpy(seg_buf, buf, (size_t) copy_len);
123 buf = ((char*) buf + copy_len);
125 seg_buf = seg->pkt.data;
127 rte_memcpy(seg_buf, buf, (size_t) len);
131 copy_buf_to_pkt(void* buf, unsigned len, struct rte_mbuf *pkt, unsigned offset)
133 if (offset + len <= pkt->pkt.data_len) {
134 rte_memcpy(((char *) pkt->pkt.data + offset), buf, (size_t) len);
137 copy_buf_to_pkt_segs(buf, len, pkt, offset);
141 setup_pkt_udp_ip_headers(struct ipv4_hdr *ip_hdr,
142 struct udp_hdr *udp_hdr,
143 uint16_t pkt_data_len)
150 * Initialize UDP header.
152 pkt_len = (uint16_t) (pkt_data_len + sizeof(struct udp_hdr));
153 udp_hdr->src_port = rte_cpu_to_be_16(UDP_SRC_PORT);
154 udp_hdr->dst_port = rte_cpu_to_be_16(UDP_DST_PORT);
155 udp_hdr->dgram_len = RTE_CPU_TO_BE_16(pkt_len);
156 udp_hdr->dgram_cksum = 0; /* No UDP checksum. */
159 * Initialize IP header.
161 pkt_len = (uint16_t) (pkt_len + sizeof(struct ipv4_hdr));
162 ip_hdr->version_ihl = IP_VHL_DEF;
163 ip_hdr->type_of_service = 0;
164 ip_hdr->fragment_offset = 0;
165 ip_hdr->time_to_live = IP_DEFTTL;
166 ip_hdr->next_proto_id = IPPROTO_UDP;
167 ip_hdr->packet_id = 0;
168 ip_hdr->total_length = RTE_CPU_TO_BE_16(pkt_len);
169 ip_hdr->src_addr = rte_cpu_to_be_32(IP_SRC_ADDR);
170 ip_hdr->dst_addr = rte_cpu_to_be_32(IP_DST_ADDR);
173 * Compute IP header checksum.
175 ptr16 = (uint16_t*) ip_hdr;
177 ip_cksum += ptr16[0]; ip_cksum += ptr16[1];
178 ip_cksum += ptr16[2]; ip_cksum += ptr16[3];
179 ip_cksum += ptr16[4];
180 ip_cksum += ptr16[6]; ip_cksum += ptr16[7];
181 ip_cksum += ptr16[8]; ip_cksum += ptr16[9];
184 * Reduce 32 bit checksum to 16 bits and complement it.
186 ip_cksum = ((ip_cksum & 0xFFFF0000) >> 16) +
187 (ip_cksum & 0x0000FFFF);
188 if (ip_cksum > 65535)
190 ip_cksum = (~ip_cksum) & 0x0000FFFF;
193 ip_hdr->hdr_checksum = (uint16_t) ip_cksum;
197 * Transmit a burst of multi-segments packets.
200 pkt_burst_transmit(struct fwd_stream *fs)
202 struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
203 struct rte_mbuf *pkt;
204 struct rte_mbuf *pkt_seg;
205 struct rte_mempool *mbp;
206 struct ether_hdr eth_hdr;
212 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
215 uint64_t core_cycles;
218 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
219 start_tsc = rte_rdtsc();
222 mbp = current_fwd_lcore()->mbp;
223 vlan_tci = ports[fs->tx_port].tx_vlan_id;
224 ol_flags = ports[fs->tx_port].tx_ol_flags;
225 for (nb_pkt = 0; nb_pkt < nb_pkt_per_burst; nb_pkt++) {
226 pkt = tx_mbuf_alloc(mbp);
233 pkt->pkt.data_len = tx_pkt_seg_lengths[0];
235 for (i = 1; i < tx_pkt_nb_segs; i++) {
236 pkt_seg->pkt.next = tx_mbuf_alloc(mbp);
237 if (pkt_seg->pkt.next == NULL) {
238 rte_pktmbuf_free(pkt);
241 pkt_seg = pkt_seg->pkt.next;
242 pkt_seg->pkt.data_len = tx_pkt_seg_lengths[i];
244 pkt_seg->pkt.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->pkt.nb_segs = tx_pkt_nb_segs;
268 pkt->pkt.pkt_len = tx_pkt_length;
269 pkt->ol_flags = ol_flags;
270 pkt->pkt.vlan_tci = vlan_tci;
271 pkt->pkt.l2_len = sizeof(struct ether_hdr);
272 pkt->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);
276 fs->tx_packets += nb_tx;
278 #ifdef RTE_TEST_PMD_RECORD_BURST_STATS
279 fs->tx_burst_stats.pkt_burst_spread[nb_tx]++;
281 if (unlikely(nb_tx < nb_pkt)) {
282 if (verbose_level > 0 && fs->fwd_dropped == 0)
283 printf("port %d tx_queue %d - drop "
284 "(nb_pkt:%u - nb_tx:%u)=%u packets\n",
285 fs->tx_port, fs->tx_queue,
286 (unsigned) nb_pkt, (unsigned) nb_tx,
287 (unsigned) (nb_pkt - nb_tx));
288 fs->fwd_dropped += (nb_pkt - nb_tx);
290 rte_pktmbuf_free(pkts_burst[nb_tx]);
291 } while (++nb_tx < nb_pkt);
294 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
295 end_tsc = rte_rdtsc();
296 core_cycles = (end_tsc - start_tsc);
297 fs->core_cycles = (uint64_t) (fs->core_cycles + core_cycles);
302 tx_only_begin(__attribute__((unused)) portid_t pi)
304 uint16_t pkt_data_len;
306 pkt_data_len = (uint16_t) (tx_pkt_length - (sizeof(struct ether_hdr) +
307 sizeof(struct ipv4_hdr) +
308 sizeof(struct udp_hdr)));
309 setup_pkt_udp_ip_headers(&pkt_ip_hdr, &pkt_udp_hdr, pkt_data_len);
312 struct fwd_engine tx_only_engine = {
313 .fwd_mode_name = "txonly",
314 .port_fwd_begin = tx_only_begin,
315 .port_fwd_end = NULL,
316 .packet_fwd = pkt_burst_transmit,