Imported Upstream version 16.04

[deb_dpdk.git] / examples / l3fwd / l3fwd_em.h

diff --git a/examples/l3fwd/l3fwd_em.h b/examples/l3fwd/l3fwd_em.h
new file mode 100644 (file)
index 0000000..2284bbd
--- /dev/null
+++ b/examples/l3fwd/l3fwd_em.h
@@ -0,0 +1,138 @@
+/*-
+ *   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_H__
+#define __L3FWD_EM_H__
+
+static inline __attribute__((always_inline)) void
+l3fwd_em_simple_forward(struct rte_mbuf *m, uint8_t portid,
+               struct lcore_conf *qconf)
+{
+       struct ether_hdr *eth_hdr;
+       struct ipv4_hdr *ipv4_hdr;
+       uint8_t dst_port;
+       uint32_t tcp_or_udp;
+       uint32_t l3_ptypes;
+
+       eth_hdr = rte_pktmbuf_mtod(m, struct ether_hdr *);
+       tcp_or_udp = m->packet_type & (RTE_PTYPE_L4_TCP | RTE_PTYPE_L4_UDP);
+       l3_ptypes = m->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(m, struct ipv4_hdr *,
+                                                  sizeof(struct ether_hdr));
+
+#ifdef DO_RFC_1812_CHECKS
+               /* Check to make sure the packet is valid (RFC1812) */
+               if (is_valid_ipv4_pkt(ipv4_hdr, m->pkt_len) < 0) {
+                       rte_pktmbuf_free(m);
+                       return;
+               }
+#endif
+               dst_port = em_get_ipv4_dst_port(ipv4_hdr, portid,
+                                               qconf->ipv4_lookup_struct);
+
+               if (dst_port >= RTE_MAX_ETHPORTS ||
+                       (enabled_port_mask & 1 << dst_port) == 0)
+                       dst_port = portid;
+
+#ifdef DO_RFC_1812_CHECKS
+               /* Update time to live and header checksum */
+               --(ipv4_hdr->time_to_live);
+               ++(ipv4_hdr->hdr_checksum);
+#endif
+               /* dst addr */
+               *(uint64_t *)&eth_hdr->d_addr = dest_eth_addr[dst_port];
+
+               /* src addr */
+               ether_addr_copy(&ports_eth_addr[dst_port], &eth_hdr->s_addr);
+
+               send_single_packet(qconf, m, dst_port);
+       } else if (tcp_or_udp && (l3_ptypes == RTE_PTYPE_L3_IPV6)) {
+               /* Handle IPv6 headers.*/
+               struct ipv6_hdr *ipv6_hdr;
+
+               ipv6_hdr = rte_pktmbuf_mtod_offset(m, struct ipv6_hdr *,
+                                                  sizeof(struct ether_hdr));
+
+               dst_port = em_get_ipv6_dst_port(ipv6_hdr, portid,
+                                       qconf->ipv6_lookup_struct);
+
+               if (dst_port >= RTE_MAX_ETHPORTS ||
+                       (enabled_port_mask & 1 << dst_port) == 0)
+                       dst_port = portid;
+
+               /* dst addr */
+               *(uint64_t *)&eth_hdr->d_addr = dest_eth_addr[dst_port];
+
+               /* src addr */
+               ether_addr_copy(&ports_eth_addr[dst_port], &eth_hdr->s_addr);
+
+               send_single_packet(qconf, m, dst_port);
+       } else {
+               /* Free the mbuf that contains non-IPV4/IPV6 packet */
+               rte_pktmbuf_free(m);
+       }
+}
+
+/*
+ * Buffer non-optimized handling of packets, invoked
+ * from main_loop.
+ */
+static inline void
+l3fwd_em_no_opt_send_packets(int nb_rx, struct rte_mbuf **pkts_burst,
+                       uint8_t portid, struct lcore_conf *qconf)
+{
+       int32_t j;
+
+       /* Prefetch first packets */
+       for (j = 0; j < PREFETCH_OFFSET && j < nb_rx; j++)
+               rte_prefetch0(rte_pktmbuf_mtod(pkts_burst[j], void *));
+
+       /*
+        * Prefetch and forward already prefetched
+        * packets.
+        */
+       for (j = 0; j < (nb_rx - PREFETCH_OFFSET); j++) {
+               rte_prefetch0(rte_pktmbuf_mtod(pkts_burst[
+                               j + PREFETCH_OFFSET], void *));
+               l3fwd_em_simple_forward(pkts_burst[j], portid, qconf);
+       }
+
+       /* Forward remaining prefetched packets */
+       for (; j < nb_rx; j++)
+               l3fwd_em_simple_forward(pkts_burst[j], portid, qconf);
+}
+
+#endif /* __L3FWD_EM_H__ */