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Elixir Cross Referencer

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/*-
 *   BSD LICENSE
 *
 *   Copyright(c) 2010-2014 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.
 */

#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_memzone.h>
#include <rte_tailq.h>
#include <rte_eal.h>
#include <rte_per_lcore.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_pci.h>
#include <rte_random.h>
#include <rte_debug.h>
#include <rte_ether.h>
#include <rte_ethdev.h>
#include <rte_ring.h>
#include <rte_log.h>
#include <rte_mempool.h>
#include <rte_mbuf.h>
#include <rte_memcpy.h>

#include "main.h"

#define MAX_QUEUES 128
/*
 * For 10 GbE, 128 queues require roughly
 * 128*512 (RX/TX_queue_nb * RX/TX_ring_descriptors_nb) per port.
 */
#define NUM_MBUFS_PER_PORT (128*512)
#define MBUF_CACHE_SIZE 64
#define MBUF_SIZE (2048 + sizeof(struct rte_mbuf) + RTE_PKTMBUF_HEADROOM)

/*
 * 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.
 */
#define RX_PTHRESH 8 /**< Default values of RX prefetch threshold reg. */
#define RX_HTHRESH 8 /**< Default values of RX host threshold reg. */
#define RX_WTHRESH 4 /**< Default values of RX write-back threshold reg. */

/*
 * 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 TX_PTHRESH 36 /**< Default values of TX prefetch threshold reg. */
#define TX_HTHRESH 0  /**< Default values of TX host threshold reg. */
#define TX_WTHRESH 0  /**< Default values of TX write-back threshold reg. */

#define MAX_PKT_BURST 32

/*
 * Configurable number of RX/TX ring descriptors
 */
#define RTE_TEST_RX_DESC_DEFAULT 128
#define RTE_TEST_TX_DESC_DEFAULT 512

#define INVALID_PORT_ID 0xFF

/* mask of enabled ports */
static uint32_t enabled_port_mask = 0;

/* number of pools (if user does not specify any, 8 by default */
static uint32_t num_queues = 8;
static uint32_t num_pools = 8;

/*
 * 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 = RX_PTHRESH,
		.hthresh = RX_HTHRESH,
		.wthresh = RX_WTHRESH,
	},
	.rx_drop_en = 1,
};

/*
 * These default values are optimized for use with the Intel(R) 82599 10 GbE
 * Controller and the DPDK ixgbe/igb 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 = TX_PTHRESH,
		.hthresh = TX_HTHRESH,
		.wthresh = TX_WTHRESH,
	},
	.tx_free_thresh = 0, /* Use PMD default values */
	.tx_rs_thresh = 0, /* Use PMD default values */
};

/* empty vmdq configuration structure. Filled in programatically */
static const struct rte_eth_conf vmdq_conf_default = {
	.rxmode = {
		.mq_mode        = ETH_MQ_RX_VMDQ_ONLY,
		.split_hdr_size = 0,
		.header_split   = 0, /**< Header Split disabled */
		.hw_ip_checksum = 0, /**< IP checksum offload disabled */
		.hw_vlan_filter = 0, /**< VLAN filtering disabled */
		.jumbo_frame    = 0, /**< Jumbo Frame Support disabled */
	},

	.txmode = {
		.mq_mode = ETH_MQ_TX_NONE,
	},
	.rx_adv_conf = {
		/*
		 * should be overridden separately in code with
		 * appropriate values
		 */
		.vmdq_rx_conf = {
			.nb_queue_pools = ETH_8_POOLS,
			.enable_default_pool = 0,
			.default_pool = 0,
			.nb_pool_maps = 0,
			.pool_map = {{0, 0},},
		},
	},
};

static unsigned lcore_ids[RTE_MAX_LCORE];
static uint8_t ports[RTE_MAX_ETHPORTS];
static unsigned num_ports = 0; /**< The number of ports specified in command line */

/* array used for printing out statistics */
volatile unsigned long rxPackets[ MAX_QUEUES ] = {0};

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,
	32, 33, 34, 35, 36, 37, 38, 39,
	40, 41, 42, 43, 44, 45, 46, 47,
	48, 49, 50, 51, 52, 53, 54, 55,
	56, 57, 58, 59, 60, 61, 62, 63,
};

/* ethernet addresses of ports */
static struct ether_addr vmdq_ports_eth_addr[RTE_MAX_ETHPORTS];

#define MAX_QUEUE_NUM_10G 128
#define MAX_QUEUE_NUM_1G 8
#define MAX_POOL_MAP_NUM_10G 64
#define MAX_POOL_MAP_NUM_1G 32
#define MAX_POOL_NUM_10G 64
#define MAX_POOL_NUM_1G 8
/* Builds up the correct configuration for vmdq based on the vlan tags array
 * given above, and determine the queue number and pool map number according to valid pool number */
static inline int
get_eth_conf(struct rte_eth_conf *eth_conf, uint32_t num_pools)
{
	struct rte_eth_vmdq_rx_conf conf;
	unsigned i;

	conf.nb_queue_pools = (enum rte_eth_nb_pools)num_pools;
	conf.enable_default_pool = 0;
	conf.default_pool = 0; /* set explicit value, even if not used */
	switch (num_pools) {
	/* For 10G NIC like 82599, 128 is valid for queue number */
	case MAX_POOL_NUM_10G:
		num_queues = MAX_QUEUE_NUM_10G;
		conf.nb_pool_maps = MAX_POOL_MAP_NUM_10G;
		break;
	/* For 1G NIC like i350, 82580 and 82576, 8 is valid for queue number */
	case MAX_POOL_NUM_1G:
		num_queues = MAX_QUEUE_NUM_1G;
		conf.nb_pool_maps = MAX_POOL_MAP_NUM_1G;
		break;
	default:
		return -1;
	}

	for (i = 0; i < conf.nb_pool_maps; i++){
		conf.pool_map[i].vlan_id = vlan_tags[ i ];
		conf.pool_map[i].pools = (1UL << (i % num_pools));
	}

	(void)(rte_memcpy(eth_conf, &vmdq_conf_default, sizeof(*eth_conf)));
	(void)(rte_memcpy(&eth_conf->rx_adv_conf.vmdq_rx_conf, &conf,
		   sizeof(eth_conf->rx_adv_conf.vmdq_rx_conf)));
	return 0;
}

/*
 * Validate the pool number accrording to the max pool number gotten form dev_info
 * If the pool number is invalid, give the error message and return -1
 */
static inline int
validate_num_pools(uint32_t max_nb_pools)
{
	if (num_pools > max_nb_pools) {
		printf("invalid number of pools\n");
		return -1;
	}

	switch (max_nb_pools) {
	/* For 10G NIC like 82599, 64 is valid for pool number */
	case MAX_POOL_NUM_10G:
		if (num_pools != MAX_POOL_NUM_10G) {
			printf("invalid number of pools\n");
			return -1;
		}
		break;
	/* For 1G NIC like i350, 82580 and 82576, 8 is valid for pool number */
	case MAX_POOL_NUM_1G:
		if (num_pools != MAX_POOL_NUM_1G) {
			printf("invalid number of pools\n");
			return -1;
		}
		break;
	default:
		return -1;
	}

	return 0;
}

/*
 * 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(uint8_t port, struct rte_mempool *mbuf_pool)
{
	struct rte_eth_dev_info dev_info;
	struct rte_eth_conf port_conf;
	uint16_t rxRings, txRings = (uint16_t)rte_lcore_count();
	const uint16_t rxRingSize = RTE_TEST_RX_DESC_DEFAULT, txRingSize = RTE_TEST_TX_DESC_DEFAULT;
	int retval;
	uint16_t q;
	uint32_t max_nb_pools;

	/* The max pool number from dev_info will be used to validate the pool number specified in cmd line */
	rte_eth_dev_info_get (port, &dev_info);
	max_nb_pools = (uint32_t)dev_info.max_vmdq_pools;
	retval = validate_num_pools(max_nb_pools);
	if (retval < 0)
		return retval;

	retval = get_eth_conf(&port_conf, num_pools);
	if (retval < 0)
		return retval;

	if (port >= rte_eth_dev_count()) return -1;

	rxRings = (uint16_t)num_queues,
	retval = rte_eth_dev_configure(port, rxRings, txRings, &port_conf);
	if (retval != 0)
		return retval;

	for (q = 0; q < rxRings; q ++) {
		retval = rte_eth_rx_queue_setup(port, q, rxRingSize,
						rte_eth_dev_socket_id(port), &rx_conf_default,
						mbuf_pool);
		if (retval < 0)
			return retval;
	}

	for (q = 0; q < txRings; q ++) {
		retval = rte_eth_tx_queue_setup(port, q, txRingSize,
						rte_eth_dev_socket_id(port), &tx_conf_default);
		if (retval < 0)
			return retval;
	}

	retval  = rte_eth_dev_start(port);
	if (retval < 0)
		return retval;

	rte_eth_macaddr_get(port, &vmdq_ports_eth_addr[port]);
	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]);

	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;

	num_pools = n;

	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 -1;

	if (pm == 0)
		return -1;

	return pm;
}

/* Display usage */
static void
vmdq_usage(const char *prgname)
{
	printf("%s [EAL options] -- -p PORTMASK]\n"
	"  --nb-pools NP: number of pools\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},
		{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 (vmdq_parse_num_pools(optarg) == -1){
				printf("invalid number of pools\n");
				vmdq_usage(prgname);
				return -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 ether_hdr *eth;
	void *tmp;

	eth = rte_pktmbuf_mtod(m, struct 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 */
	ether_addr_copy(&vmdq_ports_eth_addr[dst_port], &eth->s_addr);
}

#ifndef RTE_EXEC_ENV_BAREMETAL
/* When we receive a HUP signal, print out our stats */
static void
sighup_handler(int signum)
{
	unsigned q;
	for (q = 0; q < num_queues; q ++) {
		if (q % (num_queues/num_pools) == 0)
			printf("\nPool %u: ", q/(num_queues/num_pools));
		printf("%lu ", rxPackets[ q ]);
	}
	printf("\nFinished handling signal %d\n", signum);
}
#endif

/*
 * Main thread that does the work, reading from INPUT_PORT
 * and writing to OUTPUT_PORT
 */
static int
lcore_main(__attribute__((__unused__)) void* dummy)
{
	const uint16_t lcore_id = (uint16_t)rte_lcore_id();
	const uint16_t num_cores = (uint16_t)rte_lcore_count();
	uint16_t core_id = 0;
	uint16_t startQueue, endQueue;
	uint16_t q, i, p;
	const uint16_t remainder = (uint16_t)(num_queues % num_cores);

	for (i = 0; i < num_cores; i ++)
		if (lcore_ids[i] == lcore_id) {
			core_id = i;
			break;
		}

	if (remainder != 0) {
		if (core_id < remainder) {
			startQueue = (uint16_t)(core_id * (num_queues/num_cores + 1));
			endQueue = (uint16_t)(startQueue + (num_queues/num_cores) + 1);
		} else {
			startQueue = (uint16_t)(core_id * (num_queues/num_cores) + remainder);
			endQueue = (uint16_t)(startQueue + (num_queues/num_cores));
		}
	} else {
		startQueue = (uint16_t)(core_id * (num_queues/num_cores));
		endQueue = (uint16_t)(startQueue + (num_queues/num_cores));
	}

	printf("core %u(lcore %u) reading queues %i-%i\n", (unsigned)core_id,
		(unsigned)lcore_id, startQueue, endQueue - 1);

	if (startQueue == endQueue) {
		printf("lcore %u has nothing to do\n", lcore_id);
		return (0);
	}

	for (;;) {
		struct rte_mbuf *buf[MAX_PKT_BURST];
		const uint16_t buf_size = sizeof(buf) / sizeof(buf[0]);

		for (p = 0; p < num_ports; p++) {
			const uint8_t sport = ports[p];
			const uint8_t dport = ports[p ^ 1]; /* 0 <-> 1, 2 <-> 3 etc */

			if ((sport == INVALID_PORT_ID) || (dport == INVALID_PORT_ID))
				continue;

			for (q = startQueue; q < endQueue; q++) {
				const uint16_t rxCount = rte_eth_rx_burst(sport,
					q, buf, buf_size);

				if (unlikely(rxCount == 0))
					continue;

				rxPackets[q] += rxCount;

				for (i = 0; i < rxCount; i++)
					update_mac_address(buf[i], dport);

				const uint16_t txCount = rte_eth_tx_burst(dport,
					core_id, 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 (ports[portid] >= nb_ports) {
			printf("\nSpecified port ID(%u) exceeds max system port ID(%u)\n",
				ports[portid], (nb_ports - 1));
			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[])
{
	struct rte_mempool *mbuf_pool;
	unsigned lcore_id, core_id = 0;
	int ret;
	unsigned nb_ports, valid_num_ports;
	uint8_t portid;

#ifndef RTE_EXEC_ENV_BAREMETAL
	signal(SIGHUP, sighup_handler);
#endif

	/* 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");

	if (rte_eal_pci_probe() != 0)
		rte_exit(EXIT_FAILURE, "Error with NIC driver initialization\n");

	for (lcore_id = 0; lcore_id < RTE_MAX_LCORE; lcore_id ++)
		if (rte_lcore_is_enabled(lcore_id))
			lcore_ids[core_id ++] = lcore_id;

	if (rte_lcore_count() > RTE_MAX_LCORE)
		rte_exit(EXIT_FAILURE,"Not enough cores\n");

	nb_ports = rte_eth_dev_count();
	if (nb_ports > RTE_MAX_ETHPORTS)
		nb_ports = RTE_MAX_ETHPORTS;

	/*
	 * 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_mempool_create("MBUF_POOL", NUM_MBUFS_PER_PORT * nb_ports,
				       MBUF_SIZE, MBUF_CACHE_SIZE,
				       sizeof(struct rte_pktmbuf_pool_private),
				       rte_pktmbuf_pool_init, NULL,
				       rte_pktmbuf_init, NULL,
				       rte_socket_id(), 0);
	if (mbuf_pool == NULL)
		rte_exit(EXIT_FAILURE, "Cannot create mbuf pool\n");

	/* initialize all ports */
	for (portid = 0; portid < nb_ports; 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 lcore */
	rte_eal_mp_remote_launch(lcore_main, NULL, CALL_MASTER);
	RTE_LCORE_FOREACH_SLAVE(lcore_id) {
		if (rte_eal_wait_lcore(lcore_id) < 0)
			return -1;
	}

	return 0;
}