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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2010-2016 Intel Corporation
*/
#ifndef __L3_FWD_H__
#define __L3_FWD_H__
#include <rte_vect.h>
#define DO_RFC_1812_CHECKS
#define RTE_LOGTYPE_L3FWD RTE_LOGTYPE_USER1
#if !defined(NO_HASH_MULTI_LOOKUP) && defined(RTE_MACHINE_CPUFLAG_NEON)
#define NO_HASH_MULTI_LOOKUP 1
#endif
#define MAX_PKT_BURST 32
#define BURST_TX_DRAIN_US 100 /* TX drain every ~100us */
#define MAX_RX_QUEUE_PER_LCORE 16
/*
* Try to avoid TX buffering if we have at least MAX_TX_BURST packets to send.
*/
#define MAX_TX_BURST (MAX_PKT_BURST / 2)
#define NB_SOCKETS 8
/* Configure how many packets ahead to prefetch, when reading packets */
#define PREFETCH_OFFSET 3
/* Used to mark destination port as 'invalid'. */
#define BAD_PORT ((uint16_t)-1)
#define FWDSTEP 4
/* replace first 12B of the ethernet header. */
#define MASK_ETH 0x3f
/* Hash parameters. */
#ifdef RTE_ARCH_64
/* default to 4 million hash entries (approx) */
#define L3FWD_HASH_ENTRIES (1024*1024*4)
#else
/* 32-bit has less address-space for hugepage memory, limit to 1M entries */
#define L3FWD_HASH_ENTRIES (1024*1024*1)
#endif
#define HASH_ENTRY_NUMBER_DEFAULT 4
struct mbuf_table {
uint16_t len;
struct rte_mbuf *m_table[MAX_PKT_BURST];
};
struct lcore_rx_queue {
uint16_t port_id;
uint8_t queue_id;
} __rte_cache_aligned;
struct lcore_conf {
uint16_t n_rx_queue;
struct lcore_rx_queue rx_queue_list[MAX_RX_QUEUE_PER_LCORE];
uint16_t n_tx_port;
uint16_t tx_port_id[RTE_MAX_ETHPORTS];
uint16_t tx_queue_id[RTE_MAX_ETHPORTS];
struct mbuf_table tx_mbufs[RTE_MAX_ETHPORTS];
void *ipv4_lookup_struct;
void *ipv6_lookup_struct;
} __rte_cache_aligned;
extern volatile bool force_quit;
/* ethernet addresses of ports */
extern uint64_t dest_eth_addr[RTE_MAX_ETHPORTS];
extern struct ether_addr ports_eth_addr[RTE_MAX_ETHPORTS];
/* mask of enabled ports */
extern uint32_t enabled_port_mask;
/* Used only in exact match mode. */
extern int ipv6; /**< ipv6 is false by default. */
extern uint32_t hash_entry_number;
extern xmm_t val_eth[RTE_MAX_ETHPORTS];
extern struct lcore_conf lcore_conf[RTE_MAX_LCORE];
/* Send burst of packets on an output interface */
static inline int
send_burst(struct lcore_conf *qconf, uint16_t n, uint16_t port)
{
struct rte_mbuf **m_table;
int ret;
uint16_t queueid;
queueid = qconf->tx_queue_id[port];
m_table = (struct rte_mbuf **)qconf->tx_mbufs[port].m_table;
ret = rte_eth_tx_burst(port, queueid, m_table, n);
if (unlikely(ret < n)) {
do {
rte_pktmbuf_free(m_table[ret]);
} while (++ret < n);
}
return 0;
}
/* Enqueue a single packet, and send burst if queue is filled */
static inline int
send_single_packet(struct lcore_conf *qconf,
struct rte_mbuf *m, uint16_t port)
{
uint16_t len;
len = qconf->tx_mbufs[port].len;
qconf->tx_mbufs[port].m_table[len] = m;
len++;
/* enough pkts to be sent */
if (unlikely(len == MAX_PKT_BURST)) {
send_burst(qconf, MAX_PKT_BURST, port);
len = 0;
}
qconf->tx_mbufs[port].len = len;
return 0;
}
#ifdef DO_RFC_1812_CHECKS
static inline int
is_valid_ipv4_pkt(struct ipv4_hdr *pkt, uint32_t link_len)
{
/* From http://www.rfc-editor.org/rfc/rfc1812.txt section 5.2.2 */
/*
* 1. The packet length reported by the Link Layer must be large
* enough to hold the minimum length legal IP datagram (20 bytes).
*/
if (link_len < sizeof(struct ipv4_hdr))
return -1;
/* 2. The IP checksum must be correct. */
/* this is checked in H/W */
/*
* 3. The IP version number must be 4. If the version number is not 4
* then the packet may be another version of IP, such as IPng or
* ST-II.
*/
if (((pkt->version_ihl) >> 4) != 4)
return -3;
/*
* 4. The IP header length field must be large enough to hold the
* minimum length legal IP datagram (20 bytes = 5 words).
*/
if ((pkt->version_ihl & 0xf) < 5)
return -4;
/*
* 5. The IP total length field must be large enough to hold the IP
* datagram header, whose length is specified in the IP header length
* field.
*/
if (rte_cpu_to_be_16(pkt->total_length) < sizeof(struct ipv4_hdr))
return -5;
return 0;
}
#endif /* DO_RFC_1812_CHECKS */
/* Function pointers for LPM or EM functionality. */
void
setup_lpm(const int socketid);
void
setup_hash(const int socketid);
int
em_check_ptype(int portid);
int
lpm_check_ptype(int portid);
uint16_t
em_cb_parse_ptype(uint16_t port, uint16_t queue, struct rte_mbuf *pkts[],
uint16_t nb_pkts, uint16_t max_pkts, void *user_param);
uint16_t
lpm_cb_parse_ptype(uint16_t port, uint16_t queue, struct rte_mbuf *pkts[],
uint16_t nb_pkts, uint16_t max_pkts, void *user_param);
int
em_main_loop(__attribute__((unused)) void *dummy);
int
lpm_main_loop(__attribute__((unused)) void *dummy);
/* Return ipv4/ipv6 fwd lookup struct for LPM or EM. */
void *
em_get_ipv4_l3fwd_lookup_struct(const int socketid);
void *
em_get_ipv6_l3fwd_lookup_struct(const int socketid);
void *
lpm_get_ipv4_l3fwd_lookup_struct(const int socketid);
void *
lpm_get_ipv6_l3fwd_lookup_struct(const int socketid);
#endif /* __L3_FWD_H__ */
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