Imported Upstream version 16.04

[deb_dpdk.git] / examples / l3fwd / l3fwd_em_sse.h

diff --git a/examples/l3fwd/l3fwd_em_sse.h b/examples/l3fwd/l3fwd_em_sse.h
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+++ b/examples/l3fwd/l3fwd_em_sse.h
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+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2010-2016 Intel Corporation. All rights reserved.
+ *   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_EM_SSE_H__
+#define __L3FWD_EM_SSE_H__
+
+/**
+ * @file
+ * This is an optional implementation of packet classification in Exact-Match
+ * path using sequential packet classification method.
+ * While hash lookup multi seems to provide better performance, it's disabled
+ * by default and can be enabled with NO_HASH_LOOKUP_MULTI global define in
+ * compilation time.
+ */
+
+#include "l3fwd_sse.h"
+
+static inline __attribute__((always_inline)) uint16_t
+em_get_dst_port(const struct lcore_conf *qconf, struct rte_mbuf *pkt,
+               uint8_t portid)
+{
+       uint8_t next_hop;
+       struct ipv4_hdr *ipv4_hdr;
+       struct ipv6_hdr *ipv6_hdr;
+       uint32_t tcp_or_udp;
+       uint32_t l3_ptypes;
+
+       tcp_or_udp = pkt->packet_type & (RTE_PTYPE_L4_TCP | RTE_PTYPE_L4_UDP);
+       l3_ptypes = pkt->packet_type & RTE_PTYPE_L3_MASK;
+
+       if (tcp_or_udp && (l3_ptypes == RTE_PTYPE_L3_IPV4)) {
+
+               /* Handle IPv4 headers.*/
+               ipv4_hdr = rte_pktmbuf_mtod_offset(pkt, struct ipv4_hdr *,
+                               sizeof(struct ether_hdr));
+
+               next_hop = em_get_ipv4_dst_port(ipv4_hdr, portid,
+                               qconf->ipv4_lookup_struct);
+
+               if (next_hop >= RTE_MAX_ETHPORTS ||
+                               (enabled_port_mask & 1 << next_hop) == 0)
+                       next_hop = portid;
+
+               return next_hop;
+
+       } else if (tcp_or_udp && (l3_ptypes == RTE_PTYPE_L3_IPV6)) {
+
+               /* Handle IPv6 headers.*/
+               ipv6_hdr = rte_pktmbuf_mtod_offset(pkt, struct ipv6_hdr *,
+                               sizeof(struct ether_hdr));
+
+               next_hop = em_get_ipv6_dst_port(ipv6_hdr, portid,
+                               qconf->ipv6_lookup_struct);
+
+               if (next_hop >= RTE_MAX_ETHPORTS ||
+                               (enabled_port_mask & 1 << next_hop) == 0)
+                       next_hop = portid;
+
+               return next_hop;
+
+       }
+
+       return portid;
+}
+
+/*
+ * Buffer optimized handling of packets, invoked
+ * from main_loop.
+ */
+static inline void
+l3fwd_em_send_packets(int nb_rx, struct rte_mbuf **pkts_burst,
+                       uint8_t portid, struct lcore_conf *qconf)
+{
+       int32_t j;
+       uint16_t dst_port[MAX_PKT_BURST];
+
+       for (j = 0; j < nb_rx; j++)
+               dst_port[j] = em_get_dst_port(qconf, pkts_burst[j], portid);
+
+       send_packets_multi(qconf, pkts_burst, dst_port, nb_rx);
+}
+#endif /* __L3FWD_EM_SSE_H__ */