DPDK  17.05.2
examples/multi_process/client_server_mp/mp_server/init.c
/*-
* BSD LICENSE
*
* Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
* All rights reserved.
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* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
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*
* * 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
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#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_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_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_string_fns.h>
#include <rte_cycles.h>
#include "common.h"
#include "args.h"
#include "init.h"
#define MBUFS_PER_CLIENT 1536
#define MBUFS_PER_PORT 1536
#define MBUF_CACHE_SIZE 512
#define RTE_MP_RX_DESC_DEFAULT 512
#define RTE_MP_TX_DESC_DEFAULT 512
#define CLIENT_QUEUE_RINGSIZE 128
#define NO_FLAGS 0
/* 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;
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_pktmbuf_pool_create(PKTMBUF_POOL_NAME, num_mbufs,
MBUF_CACHE_SIZE, 0, RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id());
return pktmbuf_pool == NULL; /* 0 on success */
}
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 = {
}
};
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;
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,
NULL, 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,
NULL);
if (retval < 0) return retval;
}
retval = rte_eth_dev_start(port_num);
if (retval < 0) return retval;
printf( "done: \n");
return 0;
}
static int
init_shm_rings(void)
{
unsigned i;
unsigned socket_id;
const char * q_name;
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 */
socket_id = rte_socket_id();
q_name = get_rx_queue_name(i);
clients[i].rx_q = rte_ring_create(q_name,
ringsize, socket_id,
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;
}
/* Check the link status of all ports in up to 9s, and print them finally */
static void
check_all_ports_link_status(uint8_t port_num, uint32_t port_mask)
{
#define CHECK_INTERVAL 100 /* 100ms */
#define MAX_CHECK_TIME 90 /* 9s (90 * 100ms) in total */
uint8_t portid, count, all_ports_up, print_flag = 0;
struct rte_eth_link link;
printf("\nChecking link status");
fflush(stdout);
for (count = 0; count <= MAX_CHECK_TIME; count++) {
all_ports_up = 1;
for (portid = 0; portid < port_num; portid++) {
if ((port_mask & (1 << ports->id[portid])) == 0)
continue;
memset(&link, 0, sizeof(link));
rte_eth_link_get_nowait(ports->id[portid], &link);
/* print link status if flag set */
if (print_flag == 1) {
if (link.link_status)
printf("Port %d Link Up - speed %u "
"Mbps - %s\n", ports->id[portid],
(unsigned)link.link_speed,
(link.link_duplex == ETH_LINK_FULL_DUPLEX) ?
("full-duplex") : ("half-duplex\n"));
else
printf("Port %d Link Down\n",
(uint8_t)ports->id[portid]);
continue;
}
/* clear all_ports_up flag if any link down */
if (link.link_status == ETH_LINK_DOWN) {
all_ports_up = 0;
break;
}
}
/* after finally printing all link status, get out */
if (print_flag == 1)
break;
if (all_ports_up == 0) {
printf(".");
fflush(stdout);
rte_delay_ms(CHECK_INTERVAL);
}
/* set the print_flag if all ports up or timeout */
if (all_ports_up == 1 || count == (MAX_CHECK_TIME - 1)) {
print_flag = 1;
printf("done\n");
}
}
}
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;
/* 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);
}
check_all_ports_link_status(ports->num_ports, (~0x0));
/* initialise the client queues/rings for inter-eu comms */
init_shm_rings();
return 0;
}