DPDK  18.11.0
examples/server_node_efd/server/init.c
/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2016-2017 Intel Corporation
*/
#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_ether.h>
#include <rte_ethdev.h>
#include <rte_malloc.h>
#include <rte_string_fns.h>
#include <rte_cycles.h>
#include <rte_efd.h>
#include <rte_hash.h>
#include "common.h"
#include "args.h"
#include "init.h"
#define MBUFS_PER_NODE 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 NODE_QUEUE_RINGSIZE 128
#define NO_FLAGS 0
/* The mbuf pool for packet rx */
struct rte_mempool *pktmbuf_pool;
/* array of info/queues for nodes */
struct node *nodes;
/* EFD table */
struct rte_efd_table *efd_table;
/* Shared info between server and nodes */
struct shared_info *info;
static int
init_mbuf_pools(void)
{
const unsigned int num_mbufs = (num_nodes * MBUFS_PER_NODE) +
(info->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(uint16_t port_num)
{
/* for port configuration all features are off by default */
struct rte_eth_conf port_conf = {
.rxmode = {
},
};
const uint16_t rx_rings = 1, tx_rings = num_nodes;
uint16_t rx_ring_size = RTE_MP_RX_DESC_DEFAULT;
uint16_t tx_ring_size = RTE_MP_TX_DESC_DEFAULT;
struct rte_eth_dev_info dev_info;
struct rte_eth_txconf txconf;
uint16_t q;
int retval;
printf("Port %u init ... ", port_num);
fflush(stdout);
rte_eth_dev_info_get(port_num, &dev_info);
if (dev_info.tx_offload_capa & DEV_TX_OFFLOAD_MBUF_FAST_FREE)
port_conf.txmode.offloads |=
/*
* Standard DPDK port initialisation - config port, then set up
* rx and tx rings.
*/
retval = rte_eth_dev_configure(port_num, rx_rings, tx_rings, &port_conf);
if (retval != 0)
return retval;
retval = rte_eth_dev_adjust_nb_rx_tx_desc(port_num, &rx_ring_size,
&tx_ring_size);
if (retval != 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;
}
txconf = dev_info.default_txconf;
txconf.offloads = port_conf.txmode.offloads;
for (q = 0; q < tx_rings; q++) {
retval = rte_eth_tx_queue_setup(port_num, q, tx_ring_size,
&txconf);
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 int i;
unsigned int socket_id;
const char *q_name;
const unsigned int ringsize = NODE_QUEUE_RINGSIZE;
nodes = rte_malloc("node details",
sizeof(*nodes) * num_nodes, 0);
if (nodes == NULL)
rte_exit(EXIT_FAILURE, "Cannot allocate memory for "
"node program details\n");
for (i = 0; i < num_nodes; i++) {
/* Create an RX queue for each node */
socket_id = rte_socket_id();
q_name = get_rx_queue_name(i);
nodes[i].rx_q = rte_ring_create(q_name,
ringsize, socket_id,
if (nodes[i].rx_q == NULL)
rte_exit(EXIT_FAILURE, "Cannot create rx ring queue "
"for node %u\n", i);
}
return 0;
}
/*
* Create EFD table which will contain all the flows
* that will be distributed among the nodes
*/
static void
create_efd_table(void)
{
uint8_t socket_id = rte_socket_id();
/* create table */
efd_table = rte_efd_create("flow table", num_flows * 2, sizeof(uint32_t),
1 << socket_id, socket_id);
if (efd_table == NULL)
rte_exit(EXIT_FAILURE, "Problem creating the flow table\n");
}
static void
populate_efd_table(void)
{
unsigned int i;
int32_t ret;
uint32_t ip_dst;
uint8_t socket_id = rte_socket_id();
uint64_t node_id;
/* Add flows in table */
for (i = 0; i < num_flows; i++) {
node_id = i % num_nodes;
ip_dst = rte_cpu_to_be_32(i);
ret = rte_efd_update(efd_table, socket_id,
(void *)&ip_dst, (efd_value_t)node_id);
if (ret < 0)
rte_exit(EXIT_FAILURE, "Unable to add entry %u in "
"EFD table\n", i);
}
printf("EFD table: Adding 0x%x keys\n", num_flows);
}
/* Check the link status of all ports in up to 9s, and print them finally */
static void
check_all_ports_link_status(uint16_t port_num, uint32_t port_mask)
{
#define CHECK_INTERVAL 100 /* 100ms */
#define MAX_CHECK_TIME 90 /* 9s (90 * 100ms) in total */
uint8_t count, all_ports_up, print_flag = 0;
uint16_t portid;
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 << info->id[portid])) == 0)
continue;
memset(&link, 0, sizeof(link));
rte_eth_link_get_nowait(info->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",
info->id[portid],
link.link_speed,
(link.link_duplex == ETH_LINK_FULL_DUPLEX) ?
("full-duplex") : ("half-duplex\n"));
else
printf("Port %d Link Down\n",
info->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_avail();
/* set up array for port data */
mz = rte_memzone_reserve(MZ_SHARED_INFO, sizeof(*info),
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(*info));
info = 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 < info->num_ports; i++) {
retval = init_port(info->id[i]);
if (retval != 0)
rte_exit(EXIT_FAILURE, "Cannot initialise port %u\n",
(unsigned int) i);
}
check_all_ports_link_status(info->num_ports, (~0x0));
/* initialise the node queues/rings for inter-eu comms */
init_shm_rings();
/* Create the EFD table */
create_efd_table();
/* Populate the EFD table */
populate_efd_table();
/* Share the total number of nodes */
info->num_nodes = num_nodes;
/* Share the total number of flows */
info->num_flows = num_flows;
return 0;
}