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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2010-2016 Intel Corporation
*/
#ifndef __L3FWD_LPM_SSE_H__
#define __L3FWD_LPM_SSE_H__
#include "l3fwd_sse.h"
/*
* Read packet_type and destination IPV4 addresses from 4 mbufs.
*/
static inline void
processx4_step1(struct rte_mbuf *pkt[FWDSTEP],
__m128i *dip,
uint32_t *ipv4_flag)
{
struct ipv4_hdr *ipv4_hdr;
struct ether_hdr *eth_hdr;
uint32_t x0, x1, x2, x3;
eth_hdr = rte_pktmbuf_mtod(pkt[0], struct ether_hdr *);
ipv4_hdr = (struct ipv4_hdr *)(eth_hdr + 1);
x0 = ipv4_hdr->dst_addr;
ipv4_flag[0] = pkt[0]->packet_type & RTE_PTYPE_L3_IPV4;
eth_hdr = rte_pktmbuf_mtod(pkt[1], struct ether_hdr *);
ipv4_hdr = (struct ipv4_hdr *)(eth_hdr + 1);
x1 = ipv4_hdr->dst_addr;
ipv4_flag[0] &= pkt[1]->packet_type;
eth_hdr = rte_pktmbuf_mtod(pkt[2], struct ether_hdr *);
ipv4_hdr = (struct ipv4_hdr *)(eth_hdr + 1);
x2 = ipv4_hdr->dst_addr;
ipv4_flag[0] &= pkt[2]->packet_type;
eth_hdr = rte_pktmbuf_mtod(pkt[3], struct ether_hdr *);
ipv4_hdr = (struct ipv4_hdr *)(eth_hdr + 1);
x3 = ipv4_hdr->dst_addr;
ipv4_flag[0] &= pkt[3]->packet_type;
dip[0] = _mm_set_epi32(x3, x2, x1, x0);
}
/*
* Lookup into LPM for destination port.
* If lookup fails, use incoming port (portid) as destination port.
*/
static inline void
processx4_step2(const struct lcore_conf *qconf,
__m128i dip,
uint32_t ipv4_flag,
uint16_t portid,
struct rte_mbuf *pkt[FWDSTEP],
uint16_t dprt[FWDSTEP])
{
rte_xmm_t dst;
const __m128i bswap_mask = _mm_set_epi8(12, 13, 14, 15, 8, 9, 10, 11,
4, 5, 6, 7, 0, 1, 2, 3);
/* Byte swap 4 IPV4 addresses. */
dip = _mm_shuffle_epi8(dip, bswap_mask);
/* if all 4 packets are IPV4. */
if (likely(ipv4_flag)) {
rte_lpm_lookupx4(qconf->ipv4_lookup_struct, dip, dst.u32,
portid);
/* get rid of unused upper 16 bit for each dport. */
dst.x = _mm_packs_epi32(dst.x, dst.x);
*(uint64_t *)dprt = dst.u64[0];
} else {
dst.x = dip;
dprt[0] = lpm_get_dst_port_with_ipv4(qconf, pkt[0], dst.u32[0], portid);
dprt[1] = lpm_get_dst_port_with_ipv4(qconf, pkt[1], dst.u32[1], portid);
dprt[2] = lpm_get_dst_port_with_ipv4(qconf, pkt[2], dst.u32[2], portid);
dprt[3] = lpm_get_dst_port_with_ipv4(qconf, pkt[3], dst.u32[3], portid);
}
}
/*
* Buffer optimized handling of packets, invoked
* from main_loop.
*/
static inline void
l3fwd_lpm_send_packets(int nb_rx, struct rte_mbuf **pkts_burst,
uint16_t portid, struct lcore_conf *qconf)
{
int32_t j;
uint16_t dst_port[MAX_PKT_BURST];
__m128i dip[MAX_PKT_BURST / FWDSTEP];
uint32_t ipv4_flag[MAX_PKT_BURST / FWDSTEP];
const int32_t k = RTE_ALIGN_FLOOR(nb_rx, FWDSTEP);
for (j = 0; j != k; j += FWDSTEP)
processx4_step1(&pkts_burst[j], &dip[j / FWDSTEP],
&ipv4_flag[j / FWDSTEP]);
for (j = 0; j != k; j += FWDSTEP)
processx4_step2(qconf, dip[j / FWDSTEP],
ipv4_flag[j / FWDSTEP], portid, &pkts_burst[j], &dst_port[j]);
/* Classify last up to 3 packets one by one */
switch (nb_rx % FWDSTEP) {
case 3:
dst_port[j] = lpm_get_dst_port(qconf, pkts_burst[j], portid);
j++;
/* fall-through */
case 2:
dst_port[j] = lpm_get_dst_port(qconf, pkts_burst[j], portid);
j++;
/* fall-through */
case 1:
dst_port[j] = lpm_get_dst_port(qconf, pkts_burst[j], portid);
j++;
}
send_packets_multi(qconf, pkts_burst, dst_port, nb_rx);
}
#endif /* __L3FWD_LPM_SSE_H__ */
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