DPDK  21.08.0
examples/vmdq_dcb/main.c
/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2010-2014 Intel Corporation
*/
#include <stdint.h>
#include <sys/queue.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <assert.h>
#include <errno.h>
#include <signal.h>
#include <stdarg.h>
#include <inttypes.h>
#include <getopt.h>
#include <rte_common.h>
#include <rte_log.h>
#include <rte_memory.h>
#include <rte_memcpy.h>
#include <rte_eal.h>
#include <rte_launch.h>
#include <rte_atomic.h>
#include <rte_cycles.h>
#include <rte_prefetch.h>
#include <rte_lcore.h>
#include <rte_per_lcore.h>
#include <rte_branch_prediction.h>
#include <rte_interrupts.h>
#include <rte_random.h>
#include <rte_debug.h>
#include <rte_ether.h>
#include <rte_ethdev.h>
#include <rte_mempool.h>
#include <rte_mbuf.h>
/* basic constants used in application */
#define MAX_QUEUES 1024
/*
* 1024 queues require to meet the needs of a large number of vmdq_pools.
* (RX/TX_queue_nb * RX/TX_ring_descriptors_nb) per port.
*/
#define NUM_MBUFS_PER_PORT (MAX_QUEUES * RTE_MAX(RTE_TEST_RX_DESC_DEFAULT, \
RTE_TEST_TX_DESC_DEFAULT))
#define MBUF_CACHE_SIZE 64
#define MAX_PKT_BURST 32
/*
* Configurable number of RX/TX ring descriptors
*/
#define RTE_TEST_RX_DESC_DEFAULT 1024
#define RTE_TEST_TX_DESC_DEFAULT 1024
#define INVALID_PORT_ID 0xFF
/* mask of enabled ports */
static uint32_t enabled_port_mask;
static uint16_t ports[RTE_MAX_ETHPORTS];
static unsigned num_ports;
/* number of pools (if user does not specify any, 32 by default */
static enum rte_eth_nb_pools num_pools = ETH_32_POOLS;
static enum rte_eth_nb_tcs num_tcs = ETH_4_TCS;
static uint16_t num_queues, num_vmdq_queues;
static uint16_t vmdq_pool_base, vmdq_queue_base;
static uint8_t rss_enable;
/* Empty vmdq+dcb configuration structure. Filled in programmatically. 8< */
static const struct rte_eth_conf vmdq_dcb_conf_default = {
.rxmode = {
.mq_mode = ETH_MQ_RX_VMDQ_DCB,
.split_hdr_size = 0,
},
.txmode = {
.mq_mode = ETH_MQ_TX_VMDQ_DCB,
},
/*
* should be overridden separately in code with
* appropriate values
*/
.rx_adv_conf = {
.vmdq_dcb_conf = {
.nb_queue_pools = ETH_32_POOLS,
.enable_default_pool = 0,
.default_pool = 0,
.nb_pool_maps = 0,
.pool_map = {{0, 0},},
.dcb_tc = {0},
},
.dcb_rx_conf = {
.nb_tcs = ETH_4_TCS,
.dcb_tc = {0},
},
.vmdq_rx_conf = {
.nb_queue_pools = ETH_32_POOLS,
.enable_default_pool = 0,
.default_pool = 0,
.nb_pool_maps = 0,
.pool_map = {{0, 0},},
},
},
.tx_adv_conf = {
.vmdq_dcb_tx_conf = {
.nb_queue_pools = ETH_32_POOLS,
.dcb_tc = {0},
},
},
};
/* >8 End of empty vmdq+dcb configuration structure. */
/* array used for printing out statistics */
volatile unsigned long rxPackets[MAX_QUEUES] = {0};
/* Dividing up the possible user priority values. 8< */
const uint16_t vlan_tags[] = {
0, 1, 2, 3, 4, 5, 6, 7,
8, 9, 10, 11, 12, 13, 14, 15,
16, 17, 18, 19, 20, 21, 22, 23,
24, 25, 26, 27, 28, 29, 30, 31
};
const uint16_t num_vlans = RTE_DIM(vlan_tags);
/* pool mac addr template, pool mac addr is like: 52 54 00 12 port# pool# */
static struct rte_ether_addr pool_addr_template = {
.addr_bytes = {0x52, 0x54, 0x00, 0x12, 0x00, 0x00}
};
/* ethernet addresses of ports */
static struct rte_ether_addr vmdq_ports_eth_addr[RTE_MAX_ETHPORTS];
/* Builds up the correct configuration for vmdq+dcb based on the vlan tags array
* given above, and the number of traffic classes available for use. */
static inline int
get_eth_conf(struct rte_eth_conf *eth_conf)
{
struct rte_eth_vmdq_dcb_conf conf;
struct rte_eth_vmdq_rx_conf vmdq_conf;
struct rte_eth_dcb_rx_conf dcb_conf;
struct rte_eth_vmdq_dcb_tx_conf tx_conf;
uint8_t i;
conf.nb_queue_pools = (enum rte_eth_nb_pools)num_pools;
vmdq_conf.nb_queue_pools = (enum rte_eth_nb_pools)num_pools;
tx_conf.nb_queue_pools = (enum rte_eth_nb_pools)num_pools;
conf.nb_pool_maps = num_pools;
vmdq_conf.nb_pool_maps = num_pools;
conf.enable_default_pool = 0;
vmdq_conf.enable_default_pool = 0;
conf.default_pool = 0; /* set explicit value, even if not used */
vmdq_conf.default_pool = 0;
for (i = 0; i < conf.nb_pool_maps; i++) {
conf.pool_map[i].vlan_id = vlan_tags[i];
vmdq_conf.pool_map[i].vlan_id = vlan_tags[i];
conf.pool_map[i].pools = 1UL << i;
vmdq_conf.pool_map[i].pools = 1UL << i;
}
for (i = 0; i < ETH_DCB_NUM_USER_PRIORITIES; i++){
conf.dcb_tc[i] = i % num_tcs;
dcb_conf.dcb_tc[i] = i % num_tcs;
tx_conf.dcb_tc[i] = i % num_tcs;
}
dcb_conf.nb_tcs = (enum rte_eth_nb_tcs)num_tcs;
(void)(rte_memcpy(eth_conf, &vmdq_dcb_conf_default, sizeof(*eth_conf)));
(void)(rte_memcpy(&eth_conf->rx_adv_conf.vmdq_dcb_conf, &conf,
sizeof(conf)));
(void)(rte_memcpy(&eth_conf->rx_adv_conf.dcb_rx_conf, &dcb_conf,
sizeof(dcb_conf)));
(void)(rte_memcpy(&eth_conf->rx_adv_conf.vmdq_rx_conf, &vmdq_conf,
sizeof(vmdq_conf)));
(void)(rte_memcpy(&eth_conf->tx_adv_conf.vmdq_dcb_tx_conf, &tx_conf,
sizeof(tx_conf)));
if (rss_enable) {
eth_conf->rxmode.mq_mode = ETH_MQ_RX_VMDQ_DCB_RSS;
eth_conf->rx_adv_conf.rss_conf.rss_hf = ETH_RSS_IP |
ETH_RSS_UDP |
ETH_RSS_TCP |
ETH_RSS_SCTP;
}
return 0;
}
/* >8 End of dividing up the possible user priority values. */
/*
* Initialises a given port using global settings and with the rx buffers
* coming from the mbuf_pool passed as parameter
*/
static inline int
port_init(uint16_t port, struct rte_mempool *mbuf_pool)
{
struct rte_eth_dev_info dev_info;
struct rte_eth_conf port_conf = {0};
uint16_t rxRingSize = RTE_TEST_RX_DESC_DEFAULT;
uint16_t txRingSize = RTE_TEST_TX_DESC_DEFAULT;
int retval;
uint16_t q;
uint16_t queues_per_pool;
uint32_t max_nb_pools;
struct rte_eth_txconf txq_conf;
uint64_t rss_hf_tmp;
/*
* The max pool number from dev_info will be used to validate the pool
* number specified in cmd line
*/
retval = rte_eth_dev_info_get(port, &dev_info);
if (retval != 0) {
printf("Error during getting device (port %u) info: %s\n",
port, strerror(-retval));
return retval;
}
max_nb_pools = (uint32_t)dev_info.max_vmdq_pools;
/*
* We allow to process part of VMDQ pools specified by num_pools in
* command line.
*/
if (num_pools > max_nb_pools) {
printf("num_pools %d >max_nb_pools %d\n",
num_pools, max_nb_pools);
return -1;
}
/*
* NIC queues are divided into pf queues and vmdq queues.
* There is assumption here all ports have the same configuration!
*/
vmdq_queue_base = dev_info.vmdq_queue_base;
vmdq_pool_base = dev_info.vmdq_pool_base;
printf("vmdq queue base: %d pool base %d\n",
vmdq_queue_base, vmdq_pool_base);
if (vmdq_pool_base == 0) {
num_vmdq_queues = dev_info.max_rx_queues;
num_queues = dev_info.max_rx_queues;
if (num_tcs != num_vmdq_queues / num_pools) {
printf("nb_tcs %d is invalid considering with"
" nb_pools %d, nb_tcs * nb_pools should = %d\n",
num_tcs, num_pools, num_vmdq_queues);
return -1;
}
} else {
queues_per_pool = dev_info.vmdq_queue_num /
dev_info.max_vmdq_pools;
if (num_tcs > queues_per_pool) {
printf("num_tcs %d > num of queues per pool %d\n",
num_tcs, queues_per_pool);
return -1;
}
num_vmdq_queues = num_pools * queues_per_pool;
num_queues = vmdq_queue_base + num_vmdq_queues;
printf("Configured vmdq pool num: %u,"
" each vmdq pool has %u queues\n",
num_pools, queues_per_pool);
}
if (!rte_eth_dev_is_valid_port(port))
return -1;
retval = get_eth_conf(&port_conf);
if (retval < 0)
return retval;
retval = rte_eth_dev_info_get(port, &dev_info);
if (retval != 0) {
printf("Error during getting device (port %u) info: %s\n",
port, strerror(-retval));
return retval;
}
if (dev_info.tx_offload_capa & DEV_TX_OFFLOAD_MBUF_FAST_FREE)
port_conf.txmode.offloads |=
DEV_TX_OFFLOAD_MBUF_FAST_FREE;
rss_hf_tmp = port_conf.rx_adv_conf.rss_conf.rss_hf;
port_conf.rx_adv_conf.rss_conf.rss_hf &=
dev_info.flow_type_rss_offloads;
if (port_conf.rx_adv_conf.rss_conf.rss_hf != rss_hf_tmp) {
printf("Port %u modified RSS hash function based on hardware support,"
"requested:%#"PRIx64" configured:%#"PRIx64"\n",
port,
rss_hf_tmp,
port_conf.rx_adv_conf.rss_conf.rss_hf);
}
/*
* Though in this example, all queues including pf queues are setup.
* This is because VMDQ queues doesn't always start from zero, and the
* PMD layer doesn't support selectively initialising part of rx/tx
* queues.
*/
retval = rte_eth_dev_configure(port, num_queues, num_queues, &port_conf);
if (retval != 0)
return retval;
retval = rte_eth_dev_adjust_nb_rx_tx_desc(port, &rxRingSize,
&txRingSize);
if (retval != 0)
return retval;
if (RTE_MAX(rxRingSize, txRingSize) >
RTE_MAX(RTE_TEST_RX_DESC_DEFAULT, RTE_TEST_TX_DESC_DEFAULT)) {
printf("Mbuf pool has an insufficient size for port %u.\n",
port);
return -1;
}
for (q = 0; q < num_queues; q++) {
retval = rte_eth_rx_queue_setup(port, q, rxRingSize,
rte_eth_dev_socket_id(port),
NULL,
mbuf_pool);
if (retval < 0) {
printf("initialize rx queue %d failed\n", q);
return retval;
}
}
txq_conf = dev_info.default_txconf;
txq_conf.offloads = port_conf.txmode.offloads;
for (q = 0; q < num_queues; q++) {
retval = rte_eth_tx_queue_setup(port, q, txRingSize,
rte_eth_dev_socket_id(port),
&txq_conf);
if (retval < 0) {
printf("initialize tx queue %d failed\n", q);
return retval;
}
}
retval = rte_eth_dev_start(port);
if (retval < 0) {
printf("port %d start failed\n", port);
return retval;
}
retval = rte_eth_macaddr_get(port, &vmdq_ports_eth_addr[port]);
if (retval < 0) {
printf("port %d MAC address get failed: %s\n", port,
rte_strerror(-retval));
return retval;
}
printf("Port %u MAC: %02"PRIx8" %02"PRIx8" %02"PRIx8
" %02"PRIx8" %02"PRIx8" %02"PRIx8"\n",
(unsigned)port,
vmdq_ports_eth_addr[port].addr_bytes[0],
vmdq_ports_eth_addr[port].addr_bytes[1],
vmdq_ports_eth_addr[port].addr_bytes[2],
vmdq_ports_eth_addr[port].addr_bytes[3],
vmdq_ports_eth_addr[port].addr_bytes[4],
vmdq_ports_eth_addr[port].addr_bytes[5]);
/* Set mac for each pool. 8< */
for (q = 0; q < num_pools; q++) {
struct rte_ether_addr mac;
mac = pool_addr_template;
mac.addr_bytes[4] = port;
mac.addr_bytes[5] = q;
printf("Port %u vmdq pool %u set mac %02x:%02x:%02x:%02x:%02x:%02x\n",
port, q,
mac.addr_bytes[0], mac.addr_bytes[1],
mac.addr_bytes[2], mac.addr_bytes[3],
mac.addr_bytes[4], mac.addr_bytes[5]);
retval = rte_eth_dev_mac_addr_add(port, &mac,
q + vmdq_pool_base);
if (retval) {
printf("mac addr add failed at pool %d\n", q);
return retval;
}
}
/* >8 End of set mac for each pool. */
return 0;
}
/* Check num_pools parameter and set it if OK*/
static int
vmdq_parse_num_pools(const char *q_arg)
{
char *end = NULL;
int n;
/* parse number string */
n = strtol(q_arg, &end, 10);
if ((q_arg[0] == '\0') || (end == NULL) || (*end != '\0'))
return -1;
if (n != 16 && n != 32)
return -1;
if (n == 16)
num_pools = ETH_16_POOLS;
else
num_pools = ETH_32_POOLS;
return 0;
}
/* Check num_tcs parameter and set it if OK*/
static int
vmdq_parse_num_tcs(const char *q_arg)
{
char *end = NULL;
int n;
/* parse number string */
n = strtol(q_arg, &end, 10);
if ((q_arg[0] == '\0') || (end == NULL) || (*end != '\0'))
return -1;
if (n != 4 && n != 8)
return -1;
if (n == 4)
num_tcs = ETH_4_TCS;
else
num_tcs = ETH_8_TCS;
return 0;
}
static int
parse_portmask(const char *portmask)
{
char *end = NULL;
unsigned long pm;
/* parse hexadecimal string */
pm = strtoul(portmask, &end, 16);
if ((portmask[0] == '\0') || (end == NULL) || (*end != '\0'))
return 0;
return pm;
}
/* Display usage */
static void
vmdq_usage(const char *prgname)
{
printf("%s [EAL options] -- -p PORTMASK]\n"
" --nb-pools NP: number of pools (32 default, 16)\n"
" --nb-tcs NP: number of TCs (4 default, 8)\n"
" --enable-rss: enable RSS (disabled by default)\n",
prgname);
}
/* Parse the argument (num_pools) given in the command line of the application */
static int
vmdq_parse_args(int argc, char **argv)
{
int opt;
int option_index;
unsigned i;
const char *prgname = argv[0];
static struct option long_option[] = {
{"nb-pools", required_argument, NULL, 0},
{"nb-tcs", required_argument, NULL, 0},
{"enable-rss", 0, NULL, 0},
{NULL, 0, 0, 0}
};
/* Parse command line */
while ((opt = getopt_long(argc, argv, "p:", long_option,
&option_index)) != EOF) {
switch (opt) {
/* portmask */
case 'p':
enabled_port_mask = parse_portmask(optarg);
if (enabled_port_mask == 0) {
printf("invalid portmask\n");
vmdq_usage(prgname);
return -1;
}
break;
case 0:
if (!strcmp(long_option[option_index].name, "nb-pools")) {
if (vmdq_parse_num_pools(optarg) == -1) {
printf("invalid number of pools\n");
return -1;
}
}
if (!strcmp(long_option[option_index].name, "nb-tcs")) {
if (vmdq_parse_num_tcs(optarg) == -1) {
printf("invalid number of tcs\n");
return -1;
}
}
if (!strcmp(long_option[option_index].name, "enable-rss"))
rss_enable = 1;
break;
default:
vmdq_usage(prgname);
return -1;
}
}
for (i = 0; i < RTE_MAX_ETHPORTS; i++) {
if (enabled_port_mask & (1 << i))
ports[num_ports++] = (uint8_t)i;
}
if (num_ports < 2 || num_ports % 2) {
printf("Current enabled port number is %u,"
" but it should be even and at least 2\n", num_ports);
return -1;
}
return 0;
}
static void
update_mac_address(struct rte_mbuf *m, unsigned dst_port)
{
struct rte_ether_hdr *eth;
void *tmp;
eth = rte_pktmbuf_mtod(m, struct rte_ether_hdr *);
/* 02:00:00:00:00:xx */
tmp = &eth->d_addr.addr_bytes[0];
*((uint64_t *)tmp) = 0x000000000002 + ((uint64_t)dst_port << 40);
/* src addr */
rte_ether_addr_copy(&vmdq_ports_eth_addr[dst_port], &eth->s_addr);
}
/* When we receive a HUP signal, print out our stats */
static void
sighup_handler(int signum)
{
unsigned q = vmdq_queue_base;
for (; q < num_queues; q++) {
if (q % (num_vmdq_queues / num_pools) == 0)
printf("\nPool %u: ", (q - vmdq_queue_base) /
(num_vmdq_queues / num_pools));
printf("%lu ", rxPackets[q]);
}
printf("\nFinished handling signal %d\n", signum);
}
/*
* Main thread that does the work, reading from INPUT_PORT
* and writing to OUTPUT_PORT
*/
static int
lcore_main(void *arg)
{
const uintptr_t core_num = (uintptr_t)arg;
const unsigned num_cores = rte_lcore_count();
uint16_t startQueue, endQueue;
uint16_t q, i, p;
const uint16_t quot = (uint16_t)(num_vmdq_queues / num_cores);
const uint16_t remainder = (uint16_t)(num_vmdq_queues % num_cores);
if (remainder) {
if (core_num < remainder) {
startQueue = (uint16_t)(core_num * (quot + 1));
endQueue = (uint16_t)(startQueue + quot + 1);
} else {
startQueue = (uint16_t)(core_num * quot + remainder);
endQueue = (uint16_t)(startQueue + quot);
}
} else {
startQueue = (uint16_t)(core_num * quot);
endQueue = (uint16_t)(startQueue + quot);
}
/* vmdq queue idx doesn't always start from zero.*/
startQueue += vmdq_queue_base;
endQueue += vmdq_queue_base;
printf("Core %u(lcore %u) reading queues %i-%i\n", (unsigned)core_num,
rte_lcore_id(), startQueue, endQueue - 1);
if (startQueue == endQueue) {
printf("lcore %u has nothing to do\n", (unsigned)core_num);
return 0;
}
for (;;) {
struct rte_mbuf *buf[MAX_PKT_BURST];
const uint16_t buf_size = RTE_DIM(buf);
for (p = 0; p < num_ports; p++) {
const uint8_t src = ports[p];
const uint8_t dst = ports[p ^ 1]; /* 0 <-> 1, 2 <-> 3 etc */
if ((src == INVALID_PORT_ID) || (dst == INVALID_PORT_ID))
continue;
for (q = startQueue; q < endQueue; q++) {
const uint16_t rxCount = rte_eth_rx_burst(src,
q, buf, buf_size);
if (unlikely(rxCount == 0))
continue;
rxPackets[q] += rxCount;
for (i = 0; i < rxCount; i++)
update_mac_address(buf[i], dst);
const uint16_t txCount = rte_eth_tx_burst(dst,
q, buf, rxCount);
if (txCount != rxCount) {
for (i = txCount; i < rxCount; i++)
rte_pktmbuf_free(buf[i]);
}
}
}
}
}
/*
* Update the global var NUM_PORTS and array PORTS according to system ports number
* and return valid ports number
*/
static unsigned check_ports_num(unsigned nb_ports)
{
unsigned valid_num_ports = num_ports;
unsigned portid;
if (num_ports > nb_ports) {
printf("\nSpecified port number(%u) exceeds total system port number(%u)\n",
num_ports, nb_ports);
num_ports = nb_ports;
}
for (portid = 0; portid < num_ports; portid++) {
if (!rte_eth_dev_is_valid_port(ports[portid])) {
printf("\nSpecified port ID(%u) is not valid\n",
ports[portid]);
ports[portid] = INVALID_PORT_ID;
valid_num_ports--;
}
}
return valid_num_ports;
}
/* Main function, does initialisation and calls the per-lcore functions */
int
main(int argc, char *argv[])
{
unsigned cores;
struct rte_mempool *mbuf_pool;
unsigned lcore_id;
uintptr_t i;
int ret;
unsigned nb_ports, valid_num_ports;
uint16_t portid;
signal(SIGHUP, sighup_handler);
/* init EAL */
ret = rte_eal_init(argc, argv);
if (ret < 0)
rte_exit(EXIT_FAILURE, "Error with EAL initialization\n");
argc -= ret;
argv += ret;
/* parse app arguments */
ret = vmdq_parse_args(argc, argv);
if (ret < 0)
rte_exit(EXIT_FAILURE, "Invalid VMDQ argument\n");
cores = rte_lcore_count();
if ((cores & (cores - 1)) != 0 || cores > RTE_MAX_LCORE) {
rte_exit(EXIT_FAILURE,"This program can only run on an even"
" number of cores(1-%d)\n\n", RTE_MAX_LCORE);
}
nb_ports = rte_eth_dev_count_avail();
/*
* Update the global var NUM_PORTS and global array PORTS
* and get value of var VALID_NUM_PORTS according to system ports number
*/
valid_num_ports = check_ports_num(nb_ports);
if (valid_num_ports < 2 || valid_num_ports % 2) {
printf("Current valid ports number is %u\n", valid_num_ports);
rte_exit(EXIT_FAILURE, "Error with valid ports number is not even or less than 2\n");
}
mbuf_pool = rte_pktmbuf_pool_create("MBUF_POOL",
NUM_MBUFS_PER_PORT * nb_ports, MBUF_CACHE_SIZE,
0, RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id());
if (mbuf_pool == NULL)
rte_exit(EXIT_FAILURE, "Cannot create mbuf pool\n");
/* initialize all ports */
RTE_ETH_FOREACH_DEV(portid) {
/* skip ports that are not enabled */
if ((enabled_port_mask & (1 << portid)) == 0) {
printf("\nSkipping disabled port %d\n", portid);
continue;
}
if (port_init(portid, mbuf_pool) != 0)
rte_exit(EXIT_FAILURE, "Cannot initialize network ports\n");
}
/* call lcore_main() on every worker lcore */
i = 0;
RTE_LCORE_FOREACH_WORKER(lcore_id) {
rte_eal_remote_launch(lcore_main, (void*)i++, lcore_id);
}
/* call on main too */
(void) lcore_main((void*)i);
/* clean up the EAL */
rte_eal_cleanup();
return 0;
}
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