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+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2010-2012 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.
+ *
+ * version: DPDK.L.1.2.3-3
+ */
+
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/queue.h>
+#include <errno.h>
+#include <stdarg.h>
+#include <inttypes.h>
+
+#include <rte_common.h>
+#include <rte_memory.h>
+#include <rte_memzone.h>
+#include <rte_tailq.h>
+#include <rte_eal.h>
+#include <rte_byteorder.h>
+#include <rte_atomic.h>
+#include <rte_launch.h>
+#include <rte_per_lcore.h>
+#include <rte_lcore.h>
+#include <rte_branch_prediction.h>
+#include <rte_debug.h>
+#include <rte_ring.h>
+#include <rte_log.h>
+#include <rte_mempool.h>
+#include <rte_memcpy.h>
+#include <rte_mbuf.h>
+#include <rte_interrupts.h>
+#include <rte_pci.h>
+#include <rte_ether.h>
+#include <rte_ethdev.h>
+#include <rte_malloc.h>
+#include <rte_hash_crc.h>
+#include <rte_fbk_hash.h>
+#include <rte_string_fns.h>
+
+#include "common.h"
+#include "init_drivers.h"
+#include "args.h"
+#include "init.h"
+#include "main.h"
+
+#define MBUFS_PER_CLIENT 1536
+#define MBUFS_PER_PORT 1536
+#define MBUF_CACHE_SIZE 512
+#define MBUF_OVERHEAD (sizeof(struct rte_mbuf) + RTE_PKTMBUF_HEADROOM)
+#define RX_MBUF_DATA_SIZE 2048
+#define MBUF_SIZE (RX_MBUF_DATA_SIZE + MBUF_OVERHEAD)
+
+#define RTE_MP_RX_DESC_DEFAULT 512
+#define RTE_MP_TX_DESC_DEFAULT 512
+#define CLIENT_QUEUE_RINGSIZE 128
+
+#define NO_FLAGS 0
+
+/*
+ * RX and TX Prefetch, Host, and Write-back threshold values should be
+ * carefully set for optimal performance. Consult the network
+ * controller's datasheet and supporting DPDK documentation for guidance
+ * on how these parameters should be set.
+ */
+/* Default configuration for rx and tx thresholds etc. */
+/*
+ * These default values are optimized for use with the Intel(R) 82599 10 GbE
+ * Controller and the DPDK ixgbe PMD. Consider using other values for other
+ * network controllers and/or network drivers.
+ */
+#define MP_DEFAULT_PTHRESH 36
+#define MP_DEFAULT_RX_HTHRESH 8
+#define MP_DEFAULT_TX_HTHRESH 0
+#define MP_DEFAULT_WTHRESH 0
+
+static const struct rte_eth_rxconf rx_conf_default = {
+ .rx_thresh = {
+ .pthresh = MP_DEFAULT_PTHRESH,
+ .hthresh = MP_DEFAULT_RX_HTHRESH,
+ .wthresh = MP_DEFAULT_WTHRESH,
+ },
+};
+
+static const struct rte_eth_txconf tx_conf_default = {
+ .tx_thresh = {
+ .pthresh = MP_DEFAULT_PTHRESH,
+ .hthresh = MP_DEFAULT_TX_HTHRESH,
+ .wthresh = MP_DEFAULT_WTHRESH,
+ },
+ .tx_free_thresh = 0, /* Use PMD default values */
+ .tx_rs_thresh = 0, /* Use PMD default values */
+};
+
+/* The mbuf pool for packet rx */
+struct rte_mempool *pktmbuf_pool;
+
+/* array of info/queues for clients */
+struct client *clients = NULL;
+
+/* the port details */
+struct port_info *ports;
+
+/**
+ * Initialise the mbuf pool for packet reception for the NIC, and any other
+ * buffer pools needed by the app - currently none.
+ */
+static int
+init_mbuf_pools(void)
+{
+ const unsigned num_mbufs = (num_clients * MBUFS_PER_CLIENT) \
+ + (ports->num_ports * MBUFS_PER_PORT);
+
+ /* don't pass single-producer/single-consumer flags to mbuf create as it
+ * seems faster to use a cache instead */
+ printf("Creating mbuf pool '%s' [%u mbufs] ...\n",
+ PKTMBUF_POOL_NAME, num_mbufs);
+ pktmbuf_pool = rte_mempool_create(PKTMBUF_POOL_NAME, num_mbufs,
+ MBUF_SIZE, MBUF_CACHE_SIZE,
+ sizeof(struct rte_pktmbuf_pool_private), rte_pktmbuf_pool_init,
+ NULL, rte_pktmbuf_init, NULL, SOCKET0, NO_FLAGS );
+
+ return (pktmbuf_pool == NULL); /* 0 on success */
+}
+
+/**
+ * Initialise an individual port:
+ * - configure number of rx and tx rings
+ * - set up each rx ring, to pull from the main mbuf pool
+ * - set up each tx ring
+ * - start the port and report its status to stdout
+ */
+static int
+init_port(uint8_t port_num)
+{
+ /* for port configuration all features are off by default */
+ const struct rte_eth_conf port_conf = {
+ .rxmode = {
+ .mq_mode = ETH_RSS
+ }
+ };
+ const uint16_t rx_rings = 1, tx_rings = num_clients;
+ const uint16_t rx_ring_size = RTE_MP_RX_DESC_DEFAULT;
+ const uint16_t tx_ring_size = RTE_MP_TX_DESC_DEFAULT;
+
+ struct rte_eth_link link;
+ uint16_t q;
+ int retval;
+
+ printf("Port %u init ... ", (unsigned)port_num);
+ fflush(stdout);
+
+ /* Standard DPDK port initialisation - config port, then set up
+ * rx and tx rings */
+ if ((retval = rte_eth_dev_configure(port_num, rx_rings, tx_rings,
+ &port_conf)) != 0)
+ return retval;
+
+ for (q = 0; q < rx_rings; q++) {
+ retval = rte_eth_rx_queue_setup(port_num, q, rx_ring_size,
+ SOCKET0, &rx_conf_default, pktmbuf_pool);
+ if (retval < 0) return retval;
+ }
+
+ for ( q = 0; q < tx_rings; q ++ ) {
+ retval = rte_eth_tx_queue_setup(port_num, q, tx_ring_size,
+ SOCKET0, &tx_conf_default);
+ if (retval < 0) return retval;
+ }
+
+ rte_eth_promiscuous_enable(port_num);
+
+ retval = rte_eth_dev_start(port_num);
+ if (retval < 0) return retval;
+
+ printf( "done: ");
+
+ /* get link status */
+ rte_eth_link_get(port_num, &link);
+ if (link.link_status) {
+ printf(" Link Up - speed %u Mbps - %s\n",
+ (uint32_t) link.link_speed,
+ (link.link_duplex == ETH_LINK_FULL_DUPLEX) ?
+ ("full-duplex") : ("half-duplex\n"));
+ }
+ else{
+ printf(" Link Down\n");
+ }
+ return 0;
+}
+
+/**
+ * Set up the DPDK rings which will be used to pass packets, via
+ * pointers, between the multi-process server and client processes.
+ * Each client needs one RX queue.
+ */
+static int
+init_shm_rings(void)
+{
+ unsigned i;
+ const unsigned ringsize = CLIENT_QUEUE_RINGSIZE;
+
+ clients = rte_malloc("client details",
+ sizeof(*clients) * num_clients, 0);
+ if (clients == NULL)
+ rte_exit(EXIT_FAILURE, "Cannot allocate memory for client program details\n");
+
+ for (i = 0; i < num_clients; i++) {
+ /* Create an RX queue for each client */
+ clients[i].rx_q = rte_ring_create(get_rx_queue_name(i),
+ ringsize, SOCKET0,
+ RING_F_SP_ENQ | RING_F_SC_DEQ ); /* single prod, single cons */
+ if (clients[i].rx_q == NULL)
+ rte_exit(EXIT_FAILURE, "Cannot create rx ring queue for client %u\n", i);
+ }
+ return 0;
+}
+
+/**
+ * Main init function for the multi-process server app,
+ * calls subfunctions to do each stage of the initialisation.
+ */
+int
+init(int argc, char *argv[])
+{
+ int retval;
+ const struct rte_memzone *mz;
+ uint8_t i, total_ports;
+
+ /* init EAL, parsing EAL args */
+ retval = rte_eal_init(argc, argv);
+ if (retval < 0)
+ return -1;
+ argc -= retval;
+ argv += retval;
+
+ /* initialise the nic drivers */
+ retval = init_drivers();
+ if (retval != 0)
+ rte_exit(EXIT_FAILURE, "Cannot initialise drivers\n");
+
+ /* get total number of ports */
+ total_ports = rte_eth_dev_count();
+
+ /* set up array for port data */
+ mz = rte_memzone_reserve(MZ_PORT_INFO, sizeof(*ports),
+ rte_socket_id(), NO_FLAGS);
+ if (mz == NULL)
+ rte_exit(EXIT_FAILURE, "Cannot reserve memory zone for port information\n");
+ memset(mz->addr, 0, sizeof(*ports));
+ ports = mz->addr;
+
+ /* parse additional, application arguments */
+ retval = parse_app_args(total_ports, argc, argv);
+ if (retval != 0)
+ return -1;
+
+ /* initialise mbuf pools */
+ retval = init_mbuf_pools();
+ if (retval != 0)
+ rte_exit(EXIT_FAILURE, "Cannot create needed mbuf pools\n");
+
+ /* now initialise the ports we will use */
+ for (i = 0; i < ports->num_ports; i++) {
+ retval = init_port(ports->id[i]);
+ if (retval != 0)
+ rte_exit(EXIT_FAILURE, "Cannot initialise port %u\n",
+ (unsigned)i);
+ }
+
+ /* initialise the client queues/rings for inter-eu comms */
+ init_shm_rings();
+
+ return 0;
+}