Imported Upstream version 16.04

[deb_dpdk.git] / app / test-pmd / iofwd.c

diff --git a/app/test-pmd/iofwd.c b/app/test-pmd/iofwd.c
new file mode 100644 (file)
index 0000000..8840d86
--- /dev/null
+++ b/app/test-pmd/iofwd.c
@@ -0,0 +1,128 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2010-2014 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.
+ */
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <inttypes.h>
+
+#include <sys/queue.h>
+#include <sys/stat.h>
+
+#include <rte_common.h>
+#include <rte_byteorder.h>
+#include <rte_log.h>
+#include <rte_debug.h>
+#include <rte_cycles.h>
+#include <rte_memory.h>
+#include <rte_memzone.h>
+#include <rte_launch.h>
+#include <rte_eal.h>
+#include <rte_per_lcore.h>
+#include <rte_lcore.h>
+#include <rte_atomic.h>
+#include <rte_branch_prediction.h>
+#include <rte_ring.h>
+#include <rte_memory.h>
+#include <rte_memcpy.h>
+#include <rte_mempool.h>
+#include <rte_mbuf.h>
+#include <rte_interrupts.h>
+#include <rte_pci.h>
+#include <rte_ether.h>
+#include <rte_ethdev.h>
+#include <rte_string_fns.h>
+
+#include "testpmd.h"
+
+/*
+ * Forwarding of packets in I/O mode.
+ * Forward packets "as-is".
+ * This is the fastest possible forwarding operation, as it does not access
+ * to packets data.
+ */
+static void
+pkt_burst_io_forward(struct fwd_stream *fs)
+{
+       struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
+       uint16_t nb_rx;
+       uint16_t nb_tx;
+#ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
+       uint64_t start_tsc;
+       uint64_t end_tsc;
+       uint64_t core_cycles;
+#endif
+
+#ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
+       start_tsc = rte_rdtsc();
+#endif
+
+       /*
+        * Receive a burst of packets and forward them.
+        */
+       nb_rx = rte_eth_rx_burst(fs->rx_port, fs->rx_queue, pkts_burst,
+                                nb_pkt_per_burst);
+       if (unlikely(nb_rx == 0))
+               return;
+
+#ifdef RTE_TEST_PMD_RECORD_BURST_STATS
+       fs->rx_burst_stats.pkt_burst_spread[nb_rx]++;
+#endif
+       fs->rx_packets += nb_rx;
+       nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, pkts_burst, nb_rx);
+       fs->tx_packets += nb_tx;
+#ifdef RTE_TEST_PMD_RECORD_BURST_STATS
+       fs->tx_burst_stats.pkt_burst_spread[nb_tx]++;
+#endif
+       if (unlikely(nb_tx < nb_rx)) {
+               fs->fwd_dropped += (nb_rx - nb_tx);
+               do {
+                       rte_pktmbuf_free(pkts_burst[nb_tx]);
+               } while (++nb_tx < nb_rx);
+       }
+#ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
+       end_tsc = rte_rdtsc();
+       core_cycles = (end_tsc - start_tsc);
+       fs->core_cycles = (uint64_t) (fs->core_cycles + core_cycles);
+#endif
+}
+
+struct fwd_engine io_fwd_engine = {
+       .fwd_mode_name  = "io",
+       .port_fwd_begin = NULL,
+       .port_fwd_end   = NULL,
+       .packet_fwd     = pkt_burst_io_forward,
+};