Imported Upstream version 16.04

Change-Id: I77eadcd8538a9122e4773cbe55b24033dc451757
Signed-off-by: C.J. Collier <cjcollier@linuxfoundation.org>

2 files changed, 353 insertions, 0 deletions

diff --git a/examples/multi_process/client_server_mp/mp_client/Makefile b/examples/multi_process/client_server_mp/mp_client/Makefile
new file mode 100644
index 00000000..2688fed0
--- /dev/null
+++ b/examples/multi_process/client_server_mp/mp_client/Makefile
@@ -0,0 +1,48 @@
+#   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.
+
+ifeq ($(RTE_SDK),)
+$(error "Please define RTE_SDK environment variable")
+endif
+
+# Default target, can be overriden by command line or environment
+include $(RTE_SDK)/mk/rte.vars.mk
+
+# binary name
+APP = mp_client
+
+# all source are stored in SRCS-y
+SRCS-y := client.c
+
+CFLAGS += $(WERROR_FLAGS) -O3
+CFLAGS += -I$(SRCDIR)/../shared
+
+include $(RTE_SDK)/mk/rte.extapp.mk
diff --git a/examples/multi_process/client_server_mp/mp_client/client.c b/examples/multi_process/client_server_mp/mp_client/client.c
new file mode 100644
index 00000000..d4f9ca37
--- /dev/null
+++ b/examples/multi_process/client_server_mp/mp_client/client.c
@@ -0,0 +1,305 @@
+/*-
+ *   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.
+ */
+
+#include <stdint.h>
+#include <stdio.h>
+#include <inttypes.h>
+#include <stdarg.h>
+#include <errno.h>
+#include <sys/queue.h>
+#include <stdlib.h>
+#include <getopt.h>
+#include <string.h>
+
+#include <rte_common.h>
+#include <rte_malloc.h>
+#include <rte_memory.h>
+#include <rte_memzone.h>
+#include <rte_eal.h>
+#include <rte_atomic.h>
+#include <rte_branch_prediction.h>
+#include <rte_log.h>
+#include <rte_per_lcore.h>
+#include <rte_launch.h>
+#include <rte_lcore.h>
+#include <rte_ring.h>
+#include <rte_launch.h>
+#include <rte_lcore.h>
+#include <rte_debug.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 "common.h"
+
+/* Number of packets to attempt to read from queue */
+#define PKT_READ_SIZE  ((uint16_t)32)
+
+/* our client id number - tells us which rx queue to read, and NIC TX
+ * queue to write to. */
+static uint8_t client_id = 0;
+
+#define MBQ_CAPACITY 32
+
+/* maps input ports to output ports for packets */
+static uint8_t output_ports[RTE_MAX_ETHPORTS];
+
+/* buffers up a set of packet that are ready to send */
+struct rte_eth_dev_tx_buffer *tx_buffer[RTE_MAX_ETHPORTS];
+
+/* shared data from server. We update statistics here */
+static volatile struct tx_stats *tx_stats;
+
+
+/*
+ * print a usage message
+ */
+static void
+usage(const char *progname)
+{
+	printf("Usage: %s [EAL args] -- -n <client_id>\n\n", progname);
+}
+
+/*
+ * Convert the client id number from a string to an int.
+ */
+static int
+parse_client_num(const char *client)
+{
+	char *end = NULL;
+	unsigned long temp;
+
+	if (client == NULL || *client == '\0')
+		return -1;
+
+	temp = strtoul(client, &end, 10);
+	if (end == NULL || *end != '\0')
+		return -1;
+
+	client_id = (uint8_t)temp;
+	return 0;
+}
+
+/*
+ * Parse the application arguments to the client app.
+ */
+static int
+parse_app_args(int argc, char *argv[])
+{
+	int option_index, opt;
+	char **argvopt = argv;
+	const char *progname = NULL;
+	static struct option lgopts[] = { /* no long options */
+		{NULL, 0, 0, 0 }
+	};
+	progname = argv[0];
+
+	while ((opt = getopt_long(argc, argvopt, "n:", lgopts,
+		&option_index)) != EOF){
+		switch (opt){
+			case 'n':
+				if (parse_client_num(optarg) != 0){
+					usage(progname);
+					return -1;
+				}
+				break;
+			default:
+				usage(progname);
+				return -1;
+		}
+	}
+	return 0;
+}
+
+/*
+ * Tx buffer error callback
+ */
+static void
+flush_tx_error_callback(struct rte_mbuf **unsent, uint16_t count,
+		void *userdata) {
+	int i;
+	uint8_t port_id = (uintptr_t)userdata;
+
+	tx_stats->tx_drop[port_id] += count;
+
+	/* free the mbufs which failed from transmit */
+	for (i = 0; i < count; i++)
+		rte_pktmbuf_free(unsent[i]);
+
+}
+
+static void
+configure_tx_buffer(uint8_t port_id, uint16_t size)
+{
+	int ret;
+
+	/* Initialize TX buffers */
+	tx_buffer[port_id] = rte_zmalloc_socket("tx_buffer",
+			RTE_ETH_TX_BUFFER_SIZE(size), 0,
+			rte_eth_dev_socket_id(port_id));
+	if (tx_buffer[port_id] == NULL)
+		rte_exit(EXIT_FAILURE, "Cannot allocate buffer for tx on port %u\n",
+				(unsigned) port_id);
+
+	rte_eth_tx_buffer_init(tx_buffer[port_id], size);
+
+	ret = rte_eth_tx_buffer_set_err_callback(tx_buffer[port_id],
+			flush_tx_error_callback, (void *)(intptr_t)port_id);
+	if (ret < 0)
+			rte_exit(EXIT_FAILURE, "Cannot set error callback for "
+					"tx buffer on port %u\n", (unsigned) port_id);
+}
+
+/*
+ * set up output ports so that all traffic on port gets sent out
+ * its paired port. Index using actual port numbers since that is
+ * what comes in the mbuf structure.
+ */
+static void
+configure_output_ports(const struct port_info *ports)
+{
+	int i;
+	if (ports->num_ports > RTE_MAX_ETHPORTS)
+		rte_exit(EXIT_FAILURE, "Too many ethernet ports. RTE_MAX_ETHPORTS = %u\n",
+				(unsigned)RTE_MAX_ETHPORTS);
+	for (i = 0; i < ports->num_ports - 1; i+=2){
+		uint8_t p1 = ports->id[i];
+		uint8_t p2 = ports->id[i+1];
+		output_ports[p1] = p2;
+		output_ports[p2] = p1;
+
+		configure_tx_buffer(p1, MBQ_CAPACITY);
+		configure_tx_buffer(p2, MBQ_CAPACITY);
+
+	}
+}
+
+/*
+ * This function performs routing of packets
+ * Just sends each input packet out an output port based solely on the input
+ * port it arrived on.
+ */
+static void
+handle_packet(struct rte_mbuf *buf)
+{
+	int sent;
+	const uint8_t in_port = buf->port;
+	const uint8_t out_port = output_ports[in_port];
+	struct rte_eth_dev_tx_buffer *buffer = tx_buffer[out_port];
+
+	sent = rte_eth_tx_buffer(out_port, client_id, buffer, buf);
+	if (sent)
+		tx_stats->tx[out_port] += sent;
+
+}
+
+/*
+ * Application main function - loops through
+ * receiving and processing packets. Never returns
+ */
+int
+main(int argc, char *argv[])
+{
+	const struct rte_memzone *mz;
+	struct rte_ring *rx_ring;
+	struct rte_mempool *mp;
+	struct port_info *ports;
+	int need_flush = 0; /* indicates whether we have unsent packets */
+	int retval;
+	void *pkts[PKT_READ_SIZE];
+	uint16_t sent;
+
+	if ((retval = rte_eal_init(argc, argv)) < 0)
+		return -1;
+	argc -= retval;
+	argv += retval;
+
+	if (parse_app_args(argc, argv) < 0)
+		rte_exit(EXIT_FAILURE, "Invalid command-line arguments\n");
+
+	if (rte_eth_dev_count() == 0)
+		rte_exit(EXIT_FAILURE, "No Ethernet ports - bye\n");
+
+	rx_ring = rte_ring_lookup(get_rx_queue_name(client_id));
+	if (rx_ring == NULL)
+		rte_exit(EXIT_FAILURE, "Cannot get RX ring - is server process running?\n");
+
+	mp = rte_mempool_lookup(PKTMBUF_POOL_NAME);
+	if (mp == NULL)
+		rte_exit(EXIT_FAILURE, "Cannot get mempool for mbufs\n");
+
+	mz = rte_memzone_lookup(MZ_PORT_INFO);
+	if (mz == NULL)
+		rte_exit(EXIT_FAILURE, "Cannot get port info structure\n");
+	ports = mz->addr;
+	tx_stats = &(ports->tx_stats[client_id]);
+
+	configure_output_ports(ports);
+
+	RTE_LOG(INFO, APP, "Finished Process Init.\n");
+
+	printf("\nClient process %d handling packets\n", client_id);
+	printf("[Press Ctrl-C to quit ...]\n");
+
+	for (;;) {
+		uint16_t i, rx_pkts = PKT_READ_SIZE;
+		uint8_t port;
+
+		/* try dequeuing max possible packets first, if that fails, get the
+		 * most we can. Loop body should only execute once, maximum */
+		while (rx_pkts > 0 &&
+				unlikely(rte_ring_dequeue_bulk(rx_ring, pkts, rx_pkts) != 0))
+			rx_pkts = (uint16_t)RTE_MIN(rte_ring_count(rx_ring), PKT_READ_SIZE);
+
+		if (unlikely(rx_pkts == 0)){
+			if (need_flush)
+				for (port = 0; port < ports->num_ports; port++) {
+					sent = rte_eth_tx_buffer_flush(ports->id[port], client_id,
+							tx_buffer[port]);
+					if (unlikely(sent))
+						tx_stats->tx[port] += sent;
+				}
+			need_flush = 0;
+			continue;
+		}
+
+		for (i = 0; i < rx_pkts; i++)
+			handle_packet(pkts[i]);
+
+		need_flush = 1;
+	}
+}