1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright(c) 2010-2016 Intel Corporation 3 */ 4 5 #ifndef __L3FWD_LPM_SSE_H__ 6 #define __L3FWD_LPM_SSE_H__ 7 8 #include "l3fwd_sse.h" 9 10 /* 11 * Read packet_type and destination IPV4 addresses from 4 mbufs. 12 */ 13 static inline void 14 processx4_step1(struct rte_mbuf *pkt[FWDSTEP], 15 __m128i *dip, 16 uint32_t *ipv4_flag) 17 { 18 struct rte_ipv4_hdr *ipv4_hdr; 19 struct rte_ether_hdr *eth_hdr; 20 uint32_t x0, x1, x2, x3; 21 22 eth_hdr = rte_pktmbuf_mtod(pkt[0], struct rte_ether_hdr *); 23 ipv4_hdr = (struct rte_ipv4_hdr *)(eth_hdr + 1); 24 x0 = ipv4_hdr->dst_addr; 25 ipv4_flag[0] = pkt[0]->packet_type & RTE_PTYPE_L3_IPV4; 26 27 eth_hdr = rte_pktmbuf_mtod(pkt[1], struct rte_ether_hdr *); 28 ipv4_hdr = (struct rte_ipv4_hdr *)(eth_hdr + 1); 29 x1 = ipv4_hdr->dst_addr; 30 ipv4_flag[0] &= pkt[1]->packet_type; 31 32 eth_hdr = rte_pktmbuf_mtod(pkt[2], struct rte_ether_hdr *); 33 ipv4_hdr = (struct rte_ipv4_hdr *)(eth_hdr + 1); 34 x2 = ipv4_hdr->dst_addr; 35 ipv4_flag[0] &= pkt[2]->packet_type; 36 37 eth_hdr = rte_pktmbuf_mtod(pkt[3], struct rte_ether_hdr *); 38 ipv4_hdr = (struct rte_ipv4_hdr *)(eth_hdr + 1); 39 x3 = ipv4_hdr->dst_addr; 40 ipv4_flag[0] &= pkt[3]->packet_type; 41 42 dip[0] = _mm_set_epi32(x3, x2, x1, x0); 43 } 44 45 /* 46 * Lookup into LPM for destination port. 47 * If lookup fails, use incoming port (portid) as destination port. 48 */ 49 static inline void 50 processx4_step2(const struct lcore_conf *qconf, 51 __m128i dip, 52 uint32_t ipv4_flag, 53 uint16_t portid, 54 struct rte_mbuf *pkt[FWDSTEP], 55 uint16_t dprt[FWDSTEP]) 56 { 57 rte_xmm_t dst; 58 const __m128i bswap_mask = _mm_set_epi8(12, 13, 14, 15, 8, 9, 10, 11, 59 4, 5, 6, 7, 0, 1, 2, 3); 60 61 /* Byte swap 4 IPV4 addresses. */ 62 dip = _mm_shuffle_epi8(dip, bswap_mask); 63 64 /* if all 4 packets are IPV4. */ 65 if (likely(ipv4_flag)) { 66 rte_lpm_lookupx4(qconf->ipv4_lookup_struct, dip, dst.u32, 67 portid); 68 /* get rid of unused upper 16 bit for each dport. */ 69 dst.x = _mm_packs_epi32(dst.x, dst.x); 70 *(uint64_t *)dprt = dst.u64[0]; 71 } else { 72 dst.x = dip; 73 dprt[0] = lpm_get_dst_port_with_ipv4(qconf, pkt[0], dst.u32[0], portid); 74 dprt[1] = lpm_get_dst_port_with_ipv4(qconf, pkt[1], dst.u32[1], portid); 75 dprt[2] = lpm_get_dst_port_with_ipv4(qconf, pkt[2], dst.u32[2], portid); 76 dprt[3] = lpm_get_dst_port_with_ipv4(qconf, pkt[3], dst.u32[3], portid); 77 } 78 } 79 80 /* 81 * Buffer optimized handling of packets, invoked 82 * from main_loop. 83 */ 84 static inline void 85 l3fwd_lpm_process_packets(int nb_rx, struct rte_mbuf **pkts_burst, 86 uint16_t portid, uint16_t *dst_port, 87 struct lcore_conf *qconf, const uint8_t do_step3) 88 { 89 int32_t j; 90 __m128i dip[MAX_PKT_BURST / FWDSTEP]; 91 uint32_t ipv4_flag[MAX_PKT_BURST / FWDSTEP]; 92 const int32_t k = RTE_ALIGN_FLOOR(nb_rx, FWDSTEP); 93 94 for (j = 0; j != k; j += FWDSTEP) 95 processx4_step1(&pkts_burst[j], &dip[j / FWDSTEP], 96 &ipv4_flag[j / FWDSTEP]); 97 98 for (j = 0; j != k; j += FWDSTEP) 99 processx4_step2(qconf, dip[j / FWDSTEP], 100 ipv4_flag[j / FWDSTEP], portid, &pkts_burst[j], &dst_port[j]); 101 102 if (do_step3) 103 for (j = 0; j != k; j += FWDSTEP) 104 processx4_step3(&pkts_burst[j], &dst_port[j]); 105 106 /* Classify last up to 3 packets one by one */ 107 switch (nb_rx % FWDSTEP) { 108 case 3: 109 dst_port[j] = lpm_get_dst_port(qconf, pkts_burst[j], portid); 110 if (do_step3) 111 process_packet(pkts_burst[j], &dst_port[j]); 112 j++; 113 /* fall-through */ 114 case 2: 115 dst_port[j] = lpm_get_dst_port(qconf, pkts_burst[j], portid); 116 if (do_step3) 117 process_packet(pkts_burst[j], &dst_port[j]); 118 j++; 119 /* fall-through */ 120 case 1: 121 dst_port[j] = lpm_get_dst_port(qconf, pkts_burst[j], portid); 122 if (do_step3) 123 process_packet(pkts_burst[j], &dst_port[j]); 124 j++; 125 } 126 } 127 128 static inline void 129 l3fwd_lpm_send_packets(int nb_rx, struct rte_mbuf **pkts_burst, uint16_t portid, 130 struct lcore_conf *qconf) 131 { 132 uint16_t dst_port[SENDM_PORT_OVERHEAD(MAX_PKT_BURST)]; 133 134 l3fwd_lpm_process_packets(nb_rx, pkts_burst, portid, dst_port, qconf, 135 0); 136 send_packets_multi(qconf, pkts_burst, dst_port, nb_rx); 137 } 138 139 #endif /* __L3FWD_LPM_SSE_H__ */ 140