1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2010-2016 Intel Corporation
10 #define DO_RFC_1812_CHECKS
12 #define RTE_LOGTYPE_L3FWD RTE_LOGTYPE_USER1
14 #if !defined(NO_HASH_MULTI_LOOKUP) && defined(RTE_MACHINE_CPUFLAG_NEON)
15 #define NO_HASH_MULTI_LOOKUP 1
18 #define MAX_PKT_BURST 32
19 #define BURST_TX_DRAIN_US 100 /* TX drain every ~100us */
21 #define MAX_RX_QUEUE_PER_LCORE 16
24 * Try to avoid TX buffering if we have at least MAX_TX_BURST packets to send.
26 #define MAX_TX_BURST (MAX_PKT_BURST / 2)
30 /* Configure how many packets ahead to prefetch, when reading packets */
31 #define PREFETCH_OFFSET 3
33 /* Used to mark destination port as 'invalid'. */
34 #define BAD_PORT ((uint16_t)-1)
38 /* replace first 12B of the ethernet header. */
41 /* Hash parameters. */
43 /* default to 4 million hash entries (approx) */
44 #define L3FWD_HASH_ENTRIES (1024*1024*4)
46 /* 32-bit has less address-space for hugepage memory, limit to 1M entries */
47 #define L3FWD_HASH_ENTRIES (1024*1024*1)
49 #define HASH_ENTRY_NUMBER_DEFAULT 4
53 struct rte_mbuf *m_table[MAX_PKT_BURST];
56 struct lcore_rx_queue {
59 } __rte_cache_aligned;
63 struct lcore_rx_queue rx_queue_list[MAX_RX_QUEUE_PER_LCORE];
65 uint16_t tx_port_id[RTE_MAX_ETHPORTS];
66 uint16_t tx_queue_id[RTE_MAX_ETHPORTS];
67 struct mbuf_table tx_mbufs[RTE_MAX_ETHPORTS];
68 void *ipv4_lookup_struct;
69 void *ipv6_lookup_struct;
70 } __rte_cache_aligned;
72 extern volatile bool force_quit;
74 /* ethernet addresses of ports */
75 extern uint64_t dest_eth_addr[RTE_MAX_ETHPORTS];
76 extern struct ether_addr ports_eth_addr[RTE_MAX_ETHPORTS];
78 /* mask of enabled ports */
79 extern uint32_t enabled_port_mask;
81 /* Used only in exact match mode. */
82 extern int ipv6; /**< ipv6 is false by default. */
83 extern uint32_t hash_entry_number;
85 extern xmm_t val_eth[RTE_MAX_ETHPORTS];
87 extern struct lcore_conf lcore_conf[RTE_MAX_LCORE];
89 /* Send burst of packets on an output interface */
91 send_burst(struct lcore_conf *qconf, uint16_t n, uint16_t port)
93 struct rte_mbuf **m_table;
97 queueid = qconf->tx_queue_id[port];
98 m_table = (struct rte_mbuf **)qconf->tx_mbufs[port].m_table;
100 ret = rte_eth_tx_burst(port, queueid, m_table, n);
101 if (unlikely(ret < n)) {
103 rte_pktmbuf_free(m_table[ret]);
110 /* Enqueue a single packet, and send burst if queue is filled */
112 send_single_packet(struct lcore_conf *qconf,
113 struct rte_mbuf *m, uint16_t port)
117 len = qconf->tx_mbufs[port].len;
118 qconf->tx_mbufs[port].m_table[len] = m;
121 /* enough pkts to be sent */
122 if (unlikely(len == MAX_PKT_BURST)) {
123 send_burst(qconf, MAX_PKT_BURST, port);
127 qconf->tx_mbufs[port].len = len;
131 #ifdef DO_RFC_1812_CHECKS
133 is_valid_ipv4_pkt(struct ipv4_hdr *pkt, uint32_t link_len)
135 /* From http://www.rfc-editor.org/rfc/rfc1812.txt section 5.2.2 */
137 * 1. The packet length reported by the Link Layer must be large
138 * enough to hold the minimum length legal IP datagram (20 bytes).
140 if (link_len < sizeof(struct ipv4_hdr))
143 /* 2. The IP checksum must be correct. */
144 /* this is checked in H/W */
147 * 3. The IP version number must be 4. If the version number is not 4
148 * then the packet may be another version of IP, such as IPng or
151 if (((pkt->version_ihl) >> 4) != 4)
154 * 4. The IP header length field must be large enough to hold the
155 * minimum length legal IP datagram (20 bytes = 5 words).
157 if ((pkt->version_ihl & 0xf) < 5)
161 * 5. The IP total length field must be large enough to hold the IP
162 * datagram header, whose length is specified in the IP header length
165 if (rte_cpu_to_be_16(pkt->total_length) < sizeof(struct ipv4_hdr))
170 #endif /* DO_RFC_1812_CHECKS */
172 /* Function pointers for LPM or EM functionality. */
174 setup_lpm(const int socketid);
177 setup_hash(const int socketid);
180 em_check_ptype(int portid);
183 lpm_check_ptype(int portid);
186 em_cb_parse_ptype(uint16_t port, uint16_t queue, struct rte_mbuf *pkts[],
187 uint16_t nb_pkts, uint16_t max_pkts, void *user_param);
190 lpm_cb_parse_ptype(uint16_t port, uint16_t queue, struct rte_mbuf *pkts[],
191 uint16_t nb_pkts, uint16_t max_pkts, void *user_param);
194 em_main_loop(__attribute__((unused)) void *dummy);
197 lpm_main_loop(__attribute__((unused)) void *dummy);
199 /* Return ipv4/ipv6 fwd lookup struct for LPM or EM. */
201 em_get_ipv4_l3fwd_lookup_struct(const int socketid);
204 em_get_ipv6_l3fwd_lookup_struct(const int socketid);
207 lpm_get_ipv4_l3fwd_lookup_struct(const int socketid);
210 lpm_get_ipv6_l3fwd_lookup_struct(const int socketid);
212 #endif /* __L3_FWD_H__ */