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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
+ */
+
+/*
+ * Sample application demostrating how to do packet I/O in a multi-process
+ * environment. The same code can be run as a primary process and as a
+ * secondary process, just with a different proc-id parameter in each case
+ * (apart from the EAL flag to indicate a secondary process).
+ *
+ * Each process will read from the same ports, given by the port-mask
+ * parameter, which should be the same in each case, just using a different
+ * queue per port as determined by the proc-id parameter.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <errno.h>
+#include <sys/queue.h>
+#include <getopt.h>
+#include <signal.h>
+#include <inttypes.h>
+
+#include <rte_common.h>
+#include <rte_log.h>
+#include <rte_memory.h>
+#include <rte_memzone.h>
+#include <rte_launch.h>
+#include <rte_tailq.h>
+#include <rte_eal.h>
+#include <rte_per_lcore.h>
+#include <rte_lcore.h>
+#include <rte_debug.h>
+#include <rte_atomic.h>
+#include <rte_branch_prediction.h>
+#include <rte_ring.h>
+#include <rte_debug.h>
+#include <rte_interrupts.h>
+#include <rte_pci.h>
+#include <rte_ether.h>
+#include <rte_ethdev.h>
+#include <rte_mempool.h>
+#include <rte_memcpy.h>
+#include <rte_mbuf.h>
+#include <rte_string_fns.h>
+
+#define RTE_LOGTYPE_APP RTE_LOGTYPE_USER1
+
+#define SOCKET0 0
+
+#define MBUF_SIZE (2048 + sizeof(struct rte_mbuf) + RTE_PKTMBUF_HEADROOM)
+#define NB_MBUFS 64*1024 /* use 64k mbufs */
+#define MBUF_CACHE_SIZE 256
+#define PKT_BURST 32
+#define RX_RING_SIZE 128
+#define TX_RING_SIZE 512
+
+#define PARAM_PROC_ID "proc-id"
+#define PARAM_NUM_PROCS "num-procs"
+
+/*
+ * 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. */
+static const struct rte_eth_rxconf rx_conf_default = {
+ .rx_thresh = {
+ .pthresh = 8,
+ .hthresh = 8,
+ .wthresh = 4,
+ },
+};
+
+/*
+ * 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.
+ */
+static const struct rte_eth_txconf tx_conf_default = {
+ .tx_thresh = {
+ .pthresh = 36,
+ .hthresh = 0,
+ .wthresh = 0,
+ },
+ .tx_free_thresh = 0, /* Use PMD default values */
+ .tx_rs_thresh = 0, /* Use PMD default values */
+};
+
+/* for each lcore, record the elements of the ports array to use */
+struct lcore_ports{
+ unsigned start_port;
+ unsigned num_ports;
+};
+
+/* structure to record the rx and tx packets. Put two per cache line as ports
+ * used in pairs */
+struct port_stats{
+ unsigned rx;
+ unsigned tx;
+ unsigned drop;
+} __attribute__((aligned(CACHE_LINE_SIZE / 2)));
+
+static int proc_id = -1;
+static unsigned num_procs = 0;
+
+static uint8_t ports[RTE_MAX_ETHPORTS];
+static unsigned num_ports = 0;
+
+static struct lcore_ports lcore_ports[RTE_MAX_LCORE];
+static struct port_stats pstats[RTE_MAX_ETHPORTS];
+
+/* prints the usage statement and quits with an error message */
+static void
+smp_usage(const char *prgname, const char *errmsg)
+{
+ printf("\nError: %s\n",errmsg);
+ printf("\n%s [EAL options] -- -p <port mask> "
+ "--"PARAM_NUM_PROCS" <n>"
+ " --"PARAM_PROC_ID" <id>\n"
+ "-p : a hex bitmask indicating what ports are to be used\n"
+ "--num-procs: the number of processes which will be used\n"
+ "--proc-id : the id of the current process (id < num-procs)\n"
+ "\n",
+ prgname);
+ exit(1);
+}
+
+
+/* signal handler configured for SIGTERM and SIGINT to print stats on exit */
+static void
+print_stats(int signum)
+{
+ unsigned i;
+ printf("\nExiting on signal %d\n\n", signum);
+ for (i = 0; i < num_ports; i++){
+ const uint8_t p_num = ports[i];
+ printf("Port %u: RX - %u, TX - %u, Drop - %u\n", (unsigned)p_num,
+ pstats[p_num].rx, pstats[p_num].tx, pstats[p_num].drop);
+ }
+ exit(0);
+}
+
+/* Parse the argument given in the command line of the application */
+static int
+smp_parse_args(int argc, char **argv)
+{
+ int opt, ret;
+ char **argvopt;
+ int option_index;
+ unsigned i, port_mask = 0;
+ char *prgname = argv[0];
+ static struct option lgopts[] = {
+ {PARAM_NUM_PROCS, 1, 0, 0},
+ {PARAM_PROC_ID, 1, 0, 0},
+ {NULL, 0, 0, 0}
+ };
+
+ argvopt = argv;
+
+ while ((opt = getopt_long(argc, argvopt, "p:", \
+ lgopts, &option_index)) != EOF) {
+
+ switch (opt) {
+ case 'p':
+ port_mask = strtoull(optarg, NULL, 16);
+ break;
+ /* long options */
+ case 0:
+ if (strncmp(lgopts[option_index].name, PARAM_NUM_PROCS, 8) == 0)
+ num_procs = atoi(optarg);
+ else if (strncmp(lgopts[option_index].name, PARAM_PROC_ID, 7) == 0)
+ proc_id = atoi(optarg);
+ break;
+
+ default:
+ smp_usage(prgname, "Cannot parse all command-line arguments\n");
+ }
+ }
+
+ if (optind >= 0)
+ argv[optind-1] = prgname;
+
+ if (proc_id < 0)
+ smp_usage(prgname, "Invalid or missing proc-id parameter\n");
+ if (rte_eal_process_type() == RTE_PROC_PRIMARY && num_procs == 0)
+ smp_usage(prgname, "Invalid or missing num-procs parameter\n");
+ if (port_mask == 0)
+ smp_usage(prgname, "Invalid or missing port mask\n");
+
+ /* get the port numbers from the port mask */
+ for(i = 0; i < rte_eth_dev_count(); i++)
+ if(port_mask & (1 << i))
+ ports[num_ports++] = (uint8_t)i;
+
+ ret = optind-1;
+ optind = 0; /* reset getopt lib */
+
+ return (ret);
+}
+
+/* Queries the link status of a port and prints it to screen */
+static void
+report_link_status(uint8_t port)
+{
+ /* get link status */
+ struct rte_eth_link link;
+ rte_eth_link_get(port, &link);
+ if (link.link_status)
+ printf("Port %u: Link Up - %u Gbps - %s\n", (unsigned)port,
+ (unsigned) link.link_speed / 1000,
+ (link.link_duplex == ETH_LINK_FULL_DUPLEX) ?
+ ("full-duplex") : ("half-duplex\n"));
+ else
+ printf("Port %u: Link Down\n", (unsigned)port);
+}
+
+/*
+ * Initialises a given port using global settings and with the rx buffers
+ * coming from the mbuf_pool passed as parameter
+ */
+static inline int
+smp_port_init(uint8_t port, struct rte_mempool *mbuf_pool, uint16_t num_queues)
+{
+ struct rte_eth_conf port_conf = {
+ .rxmode = {
+ .mq_mode = ETH_RSS,
+ .split_hdr_size = 0,
+ .header_split = 0, /**< Header Split disabled */
+ .hw_ip_checksum = 1, /**< IP checksum offload enabled */
+ .hw_vlan_filter = 0, /**< VLAN filtering disabled */
+ .jumbo_frame = 0, /**< Jumbo Frame Support disabled */
+ .hw_strip_crc = 0, /**< CRC stripped by hardware */
+ },
+ .rx_adv_conf = {
+ .rss_conf = {
+ .rss_key = NULL,
+ .rss_hf = ETH_RSS_IPV4,
+ },
+ },
+ .txmode = {
+ }
+ };
+ const uint16_t rx_rings = num_queues, tx_rings = num_queues;
+ int retval;
+ uint16_t q;
+
+ if (rte_eal_process_type() == RTE_PROC_SECONDARY)
+ return 0;
+
+ if (port >= rte_eth_dev_count())
+ return -1;
+
+ printf("# Initialising port %u... ", (unsigned)port);
+ fflush(stdout);
+
+ retval = rte_eth_dev_configure(port, rx_rings, tx_rings, &port_conf);
+ if (retval < 0)
+ return retval;
+
+ for (q = 0; q < rx_rings; q ++) {
+ retval = rte_eth_rx_queue_setup(port, q, RX_RING_SIZE,
+ SOCKET0, &rx_conf_default,
+ mbuf_pool);
+ if (retval < 0)
+ return retval;
+ }
+
+ for (q = 0; q < tx_rings; q ++) {
+ retval = rte_eth_tx_queue_setup(port, q, RX_RING_SIZE,
+ SOCKET0, &tx_conf_default);
+ if (retval < 0)
+ return retval;
+ }
+
+ rte_eth_promiscuous_enable(port);
+
+ retval = rte_eth_dev_start(port);
+ if (retval < 0)
+ return retval;
+
+ return 0;
+}
+
+/* Goes through each of the lcores and calculates what ports should
+ * be used by that core. Fills in the global lcore_ports[] array.
+ */
+static void
+assign_ports_to_cores(void)
+{
+
+ const unsigned lcores = rte_eal_get_configuration()->lcore_count;
+ const unsigned port_pairs = num_ports / 2;
+ const unsigned pairs_per_lcore = port_pairs / lcores;
+ unsigned extra_pairs = port_pairs % lcores;
+ unsigned ports_assigned = 0;
+ unsigned i;
+
+ RTE_LCORE_FOREACH(i) {
+ lcore_ports[i].start_port = ports_assigned;
+ lcore_ports[i].num_ports = pairs_per_lcore * 2;
+ if (extra_pairs > 0) {
+ lcore_ports[i].num_ports += 2;
+ extra_pairs--;
+ }
+ ports_assigned += lcore_ports[i].num_ports;
+ }
+}
+
+/* Main function used by the processing threads.
+ * Prints out some configuration details for the thread and then begins
+ * performing packet RX and TX.
+ */
+static int
+lcore_main(void *arg __rte_unused)
+{
+ const unsigned id = rte_lcore_id();
+ const unsigned start_port = lcore_ports[id].start_port;
+ const unsigned end_port = start_port + lcore_ports[id].num_ports;
+ const uint16_t q_id = (uint16_t)proc_id;
+ unsigned p, i;
+ char msgbuf[256];
+ int msgbufpos = 0;
+
+ if (start_port == end_port){
+ printf("Lcore %u has nothing to do\n", id);
+ return 0;
+ }
+
+ /* build up message in msgbuf before printing to decrease likelihood
+ * of multi-core message interleaving.
+ */
+ msgbufpos += rte_snprintf(msgbuf, sizeof(msgbuf) - msgbufpos,
+ "Lcore %u using ports ", id);
+ for (p = start_port; p < end_port; p++){
+ msgbufpos += rte_snprintf(msgbuf + msgbufpos, sizeof(msgbuf) - msgbufpos,
+ "%u ", (unsigned)ports[p]);
+ }
+ printf("%s\n", msgbuf);
+ printf("lcore %u using queue %u of each port\n", id, (unsigned)q_id);
+
+ /* handle packet I/O from the ports, reading and writing to the
+ * queue number corresponding to our process number (not lcore id)
+ */
+
+ for (;;) {
+ struct rte_mbuf *buf[PKT_BURST];
+
+ for (p = start_port; p < end_port; p++) {
+ const uint8_t src = ports[p];
+ const uint8_t dst = ports[p ^ 1]; /* 0 <-> 1, 2 <-> 3 etc */
+ const uint16_t rx_c = rte_eth_rx_burst(src, q_id, buf, PKT_BURST);
+ if (rx_c == 0)
+ continue;
+ pstats[src].rx += rx_c;
+
+ const uint16_t tx_c = rte_eth_tx_burst(dst, q_id, buf, rx_c);
+ pstats[dst].tx += tx_c;
+ if (tx_c != rx_c) {
+ pstats[dst].drop += (rx_c - tx_c);
+ for (i = tx_c; i < rx_c; i++)
+ rte_pktmbuf_free(buf[i]);
+ }
+ }
+ }
+}
+
+/* Main function.
+ * Performs initialisation and then calls the lcore_main on each core
+ * to do the packet-processing work.
+ */
+int
+main(int argc, char **argv)
+{
+ static const char *_SMP_MBUF_POOL = "SMP_MBUF_POOL";
+ int ret;
+ unsigned i;
+ enum rte_proc_type_t proc_type;
+ struct rte_mempool *mp;
+
+ /* set up signal handlers to print stats on exit */
+ signal(SIGINT, print_stats);
+ signal(SIGTERM, print_stats);
+
+ /* initialise the EAL for all */
+ ret = rte_eal_init(argc, argv);
+ if (ret < 0)
+ rte_exit(EXIT_FAILURE, "Cannot init EAL\n");
+ argc -= ret;
+ argv += ret;
+
+ /* probe to determine the NIC devices available */
+ proc_type = rte_eal_process_type();
+#ifdef RTE_LIBRTE_IGB_PMD
+ if (rte_igb_pmd_init() < 0)
+ rte_exit(EXIT_FAILURE, "Cannot init igb pmd\n");
+#endif
+#ifdef RTE_LIBRTE_IXGBE_PMD
+ if (rte_ixgbe_pmd_init() < 0)
+ rte_exit(EXIT_FAILURE, "Cannot init ixgbe pmd\n");
+#endif
+ if (rte_eal_pci_probe() < 0)
+ rte_exit(EXIT_FAILURE, "Cannot probe PCI\n");
+ if (rte_eth_dev_count() == 0)
+ rte_exit(EXIT_FAILURE, "No Ethernet ports - bye\n");
+
+ /* parse application arguments (those after the EAL ones) */
+ smp_parse_args(argc, argv);
+
+ mp = (proc_type == RTE_PROC_SECONDARY) ?
+ rte_mempool_lookup(_SMP_MBUF_POOL) :
+ rte_mempool_create(_SMP_MBUF_POOL, NB_MBUFS, MBUF_SIZE,
+ MBUF_CACHE_SIZE, sizeof(struct rte_pktmbuf_pool_private),
+ rte_pktmbuf_pool_init, NULL,
+ rte_pktmbuf_init, NULL,
+ SOCKET0, 0);
+ if (mp == NULL)
+ rte_exit(EXIT_FAILURE, "Cannot get memory pool for buffers\n");
+
+ if (num_ports & 1)
+ rte_exit(EXIT_FAILURE, "Application must use an even number of ports\n");
+ for(i = 0; i < num_ports; i++){
+ if(proc_type == RTE_PROC_PRIMARY)
+ if (smp_port_init(ports[i], mp, (uint16_t)num_procs) < 0)
+ rte_exit(EXIT_FAILURE, "Error initialising ports\n");
+ report_link_status(ports[i]);
+ }
+
+ assign_ports_to_cores();
+
+ RTE_LOG(INFO, APP, "Finished Process Init.\n");
+
+ rte_eal_mp_remote_launch(lcore_main, NULL, CALL_MASTER);
+
+ return 0;
+}