--- /dev/null
+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2010-2016 Intel Corporation. All rights reserved.
+ * Copyright(c) 2017, Linaro Limited
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __L3FWD_LPM_NEON_H__
+#define __L3FWD_LPM_NEON_H__
+
+#include <arm_neon.h>
+
+#include "l3fwd_neon.h"
+
+/*
+ * Read packet_type and destination IPV4 addresses from 4 mbufs.
+ */
+static inline void
+processx4_step1(struct rte_mbuf *pkt[FWDSTEP],
+ int32x4_t *dip,
+ uint32_t *ipv4_flag)
+{
+ struct ipv4_hdr *ipv4_hdr;
+ struct ether_hdr *eth_hdr;
+ int32_t dst[FWDSTEP];
+
+ eth_hdr = rte_pktmbuf_mtod(pkt[0], struct ether_hdr *);
+ ipv4_hdr = (struct ipv4_hdr *)(eth_hdr + 1);
+ dst[0] = 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);
+ dst[1] = 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);
+ dst[2] = 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);
+ dst[3] = ipv4_hdr->dst_addr;
+ ipv4_flag[0] &= pkt[3]->packet_type;
+
+ dip[0] = vld1q_s32(dst);
+}
+
+/*
+ * 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,
+ int32x4_t dip,
+ uint32_t ipv4_flag,
+ uint8_t portid,
+ struct rte_mbuf *pkt[FWDSTEP],
+ uint16_t dprt[FWDSTEP])
+{
+ rte_xmm_t dst;
+
+ dip = vreinterpretq_s32_u8(vrev32q_u8(vreinterpretq_u8_s32(dip)));
+
+ /* 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. */
+ vst1_s16((int16_t *)dprt, vqmovn_s32(dst.x));
+ } 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,
+ uint8_t portid, struct lcore_conf *qconf)
+{
+ int32_t i = 0, j = 0;
+ uint16_t dst_port[MAX_PKT_BURST];
+ int32x4_t dip;
+ uint32_t ipv4_flag;
+ const int32_t k = RTE_ALIGN_FLOOR(nb_rx, FWDSTEP);
+ const int32_t m = nb_rx % FWDSTEP;
+
+ if (k) {
+ for (i = 0; i < FWDSTEP; i++) {
+ rte_prefetch0(rte_pktmbuf_mtod(pkts_burst[i],
+ struct ether_hdr *) + 1);
+ }
+
+ for (j = 0; j != k - FWDSTEP; j += FWDSTEP) {
+ for (i = 0; i < FWDSTEP; i++) {
+ rte_prefetch0(rte_pktmbuf_mtod(
+ pkts_burst[j + i + FWDSTEP],
+ struct ether_hdr *) + 1);
+ }
+
+ processx4_step1(&pkts_burst[j], &dip, &ipv4_flag);
+ processx4_step2(qconf, dip, ipv4_flag, portid,
+ &pkts_burst[j], &dst_port[j]);
+ }
+
+ processx4_step1(&pkts_burst[j], &dip, &ipv4_flag);
+ processx4_step2(qconf, dip, ipv4_flag, portid, &pkts_burst[j],
+ &dst_port[j]);
+
+ j += FWDSTEP;
+ }
+
+ if (m) {
+ /* Prefetch last up to 3 packets one by one */
+ switch (m) {
+ case 3:
+ rte_prefetch0(rte_pktmbuf_mtod(pkts_burst[j],
+ struct ether_hdr *) + 1);
+ j++;
+ /* fallthrough */
+ case 2:
+ rte_prefetch0(rte_pktmbuf_mtod(pkts_burst[j],
+ struct ether_hdr *) + 1);
+ j++;
+ /* fallthrough */
+ case 1:
+ rte_prefetch0(rte_pktmbuf_mtod(pkts_burst[j],
+ struct ether_hdr *) + 1);
+ j++;
+ }
+
+ j -= m;
+ /* Classify last up to 3 packets one by one */
+ switch (m) {
+ case 3:
+ dst_port[j] = lpm_get_dst_port(qconf, pkts_burst[j],
+ portid);
+ j++;
+ /* fallthrough */
+ case 2:
+ dst_port[j] = lpm_get_dst_port(qconf, pkts_burst[j],
+ portid);
+ j++;
+ /* fallthrough */
+ case 1:
+ dst_port[j] = lpm_get_dst_port(qconf, pkts_burst[j],
+ portid);
+ }
+ }
+
+ send_packets_multi(qconf, pkts_burst, dst_port, nb_rx);
+}
+
+#endif /* __L3FWD_LPM_NEON_H__ */
Code Review / deb_dpdk.git / blobdiff