path: root/platform/linux-generic/pktio/dpdk.c

/* Copyright (c) 2016, Linaro Limited
 * All rights reserved.
 *
 * SPDX-License-Identifier:     BSD-3-Clause
 */

#ifdef ODP_PKTIO_DPDK

#include <odp_posix_extensions.h>

#include <sched.h>
#include <ctype.h>
#include <unistd.h>

#include <odp/api/cpumask.h>

#include <odp/api/plat/packet_inlines.h>
#include <odp/api/packet.h>

#include <odp_packet_io_internal.h>
#include <odp_classification_internal.h>
#include <odp_packet_dpdk.h>
#include <odp_debug_internal.h>

#include <protocols/eth.h>

#include <rte_config.h>
#include <rte_mbuf.h>
#include <rte_ethdev.h>
#include <rte_string_fns.h>

static int disable_pktio; /** !0 this pktio disabled, 0 enabled */

/* Has dpdk_pktio_init() been called */
static odp_bool_t dpdk_initialized;

#define MEMPOOL_OPS(hdl) \
extern void mp_hdlr_init_##hdl(void)

MEMPOOL_OPS(ops_mp_mc);
MEMPOOL_OPS(ops_sp_sc);
MEMPOOL_OPS(ops_mp_sc);
MEMPOOL_OPS(ops_sp_mc);
MEMPOOL_OPS(ops_stack);

/*
 * This function is not called from anywhere, it's only purpose is to make sure
 * that if ODP and DPDK are statically linked to an application, the GCC
 * constructors of mempool handlers are linked as well. Otherwise the linker
 * would omit them. It's not an issue with dynamic linking. */
void refer_constructors(void);
void refer_constructors(void)
{
	mp_hdlr_init_ops_mp_mc();
	mp_hdlr_init_ops_sp_sc();
	mp_hdlr_init_ops_mp_sc();
	mp_hdlr_init_ops_sp_mc();
	mp_hdlr_init_ops_stack();
}

/* Test if s has only digits or not. Dpdk pktio uses only digits.*/
static int dpdk_netdev_is_valid(const char *s)
{
	while (*s) {
		if (!isdigit(*s))
			return 0;
		s++;
	}
	return 1;
}

static uint32_t dpdk_vdev_mtu_get(uint8_t port_id)
{
	struct rte_eth_dev_info dev_info;
	struct ifreq ifr;
	int sockfd;
	uint32_t mtu;

	memset(&dev_info, 0, sizeof(struct rte_eth_dev_info));

	rte_eth_dev_info_get(port_id, &dev_info);
	if_indextoname(dev_info.if_index, ifr.ifr_name);

	sockfd = socket(AF_INET, SOCK_DGRAM, 0);
	if (sockfd < 0) {
		ODP_ERR("Failed to create control socket\n");
		return 0;
	}

	mtu = mtu_get_fd(sockfd, ifr.ifr_name);
	close(sockfd);
	return mtu;
}

static uint32_t dpdk_mtu_get(pktio_entry_t *pktio_entry)
{
	pkt_dpdk_t *pkt_dpdk = &pktio_entry->s.pkt_dpdk;
	uint32_t mtu;

	if (rte_eth_dev_get_mtu(pkt_dpdk->port_id, (uint16_t *)&mtu))
		return 0;

	/* Some DPDK PMD virtual devices do not support getting MTU size.
	 * Try to use system call if DPDK cannot get MTU value.
	 */
	if (mtu == 0)
		mtu = dpdk_vdev_mtu_get(pkt_dpdk->port_id);

	/* Mbuf chaining not yet supported */
	if (pkt_dpdk->data_room && pkt_dpdk->data_room < mtu)
		return pkt_dpdk->data_room;

	return mtu;
}

static int dpdk_vdev_promisc_mode_get(uint8_t port_id)
{
	struct rte_eth_dev_info dev_info;
	struct ifreq ifr;
	int sockfd;
	int mode;

	memset(&dev_info, 0, sizeof(struct rte_eth_dev_info));

	rte_eth_dev_info_get(port_id, &dev_info);
	if_indextoname(dev_info.if_index, ifr.ifr_name);

	sockfd = socket(AF_INET, SOCK_DGRAM, 0);
	if (sockfd < 0) {
		ODP_ERR("Failed to create control socket\n");
		return -1;
	}

	mode = promisc_mode_get_fd(sockfd, ifr.ifr_name);
	close(sockfd);
	return mode;
}

static int dpdk_vdev_promisc_mode_set(uint8_t port_id, int enable)
{
	struct rte_eth_dev_info dev_info;
	struct ifreq ifr;
	int sockfd;
	int mode;

	memset(&dev_info, 0, sizeof(struct rte_eth_dev_info));

	rte_eth_dev_info_get(port_id, &dev_info);
	if_indextoname(dev_info.if_index, ifr.ifr_name);

	sockfd = socket(AF_INET, SOCK_DGRAM, 0);
	if (sockfd < 0) {
		ODP_ERR("Failed to create control socket\n");
		return -1;
	}

	mode = promisc_mode_set_fd(sockfd, ifr.ifr_name, enable);
	close(sockfd);
	return mode;
}

static void rss_conf_to_hash_proto(struct rte_eth_rss_conf *rss_conf,
				   const odp_pktin_hash_proto_t *hash_proto)
{
	memset(rss_conf, 0, sizeof(struct rte_eth_rss_conf));

	if (hash_proto->proto.ipv4_udp)
		rss_conf->rss_hf |= ETH_RSS_NONFRAG_IPV4_UDP;
	if (hash_proto->proto.ipv4_tcp)
		rss_conf->rss_hf |= ETH_RSS_NONFRAG_IPV4_TCP;
	if (hash_proto->proto.ipv4)
		rss_conf->rss_hf |= ETH_RSS_IPV4 | ETH_RSS_FRAG_IPV4 |
				    ETH_RSS_NONFRAG_IPV4_OTHER;
	if (hash_proto->proto.ipv6_udp)
		rss_conf->rss_hf |= ETH_RSS_NONFRAG_IPV6_UDP |
				    ETH_RSS_IPV6_UDP_EX;
	if (hash_proto->proto.ipv6_tcp)
		rss_conf->rss_hf |= ETH_RSS_NONFRAG_IPV6_TCP |
				    ETH_RSS_IPV6_TCP_EX;
	if (hash_proto->proto.ipv6)
		rss_conf->rss_hf |= ETH_RSS_IPV6 | ETH_RSS_FRAG_IPV6 |
				    ETH_RSS_NONFRAG_IPV6_OTHER |
				    ETH_RSS_IPV6_EX;
	rss_conf->rss_key = NULL;
}

static int dpdk_setup_port(pktio_entry_t *pktio_entry)
{
	int ret;
	pkt_dpdk_t *pkt_dpdk = &pktio_entry->s.pkt_dpdk;
	struct rte_eth_rss_conf rss_conf;

	/* Always set some hash functions to enable DPDK RSS hash calculation */
	if (pkt_dpdk->hash.all_bits == 0) {
		memset(&rss_conf, 0, sizeof(struct rte_eth_rss_conf));
		rss_conf.rss_hf = ETH_RSS_IP | ETH_RSS_TCP | ETH_RSS_UDP;
	} else {
		rss_conf_to_hash_proto(&rss_conf, &pkt_dpdk->hash);
	}

	struct rte_eth_conf port_conf = {
		.rxmode = {
			.mq_mode = ETH_MQ_RX_RSS,
			.max_rx_pkt_len = pkt_dpdk->data_room,
			.split_hdr_size = 0,
			.header_split   = 0,
			.hw_ip_checksum = 0,
			.hw_vlan_filter = 0,
			.jumbo_frame    = 1,
			.hw_strip_crc   = 0,
		},
		.rx_adv_conf = {
			.rss_conf = rss_conf,
		},
		.txmode = {
			.mq_mode = ETH_MQ_TX_NONE,
		},
	};

	ret = rte_eth_dev_configure(pkt_dpdk->port_id,
				    pktio_entry->s.num_in_queue,
				    pktio_entry->s.num_out_queue, &port_conf);
	if (ret < 0) {
		ODP_ERR("Failed to setup device: err=%d, port=%" PRIu8 "\n",
			ret, pkt_dpdk->port_id);
		return -1;
	}
	return 0;
}

static int dpdk_close(pktio_entry_t *pktio_entry)
{
	pkt_dpdk_t *pkt_dpdk = &pktio_entry->s.pkt_dpdk;
	unsigned idx;
	unsigned i, j;

	/* Free cache packets */
	for (i = 0; i < PKTIO_MAX_QUEUES; i++) {
		idx = pkt_dpdk->rx_cache[i].s.idx;

		for (j = 0; j < pkt_dpdk->rx_cache[i].s.count; j++)
			rte_pktmbuf_free(pkt_dpdk->rx_cache[i].s.pkt[idx++]);
	}

	if (pktio_entry->s.state != PKTIO_STATE_OPENED)
		rte_eth_dev_close(pkt_dpdk->port_id);

	rte_mempool_free(pkt_dpdk->pkt_pool);

	return 0;
}

static int dpdk_pktio_init(void)
{
	int dpdk_argc;
	int i;
	odp_cpumask_t mask;
	char mask_str[ODP_CPUMASK_STR_SIZE];
	const char *cmdline;
	int32_t masklen;
	int mem_str_len;
	int cmd_len;
	cpu_set_t original_cpuset;
	struct rte_config *cfg;

	/**
	 * DPDK init changes the affinity of the calling thread, so after it
	 * returns the original affinity is restored. Only the first active
	 * core is passed to rte_eal_init(), as the rest would be used for
	 * DPDK's special lcore threads, which are only available through
	 * rte_eal_[mp_]remote_launch(), but not through ODP API's.
	 * Nevertheless, odp_local_init() makes sure for the rest of
	 * the DPDK libraries ODP threads look like proper DPDK threads.
	 */
	CPU_ZERO(&original_cpuset);
	i = pthread_getaffinity_np(pthread_self(),
				   sizeof(original_cpuset), &original_cpuset);
	if (i != 0) {
		ODP_ERR("Failed to read thread affinity: %d\n", i);
		return -1;
	}

	odp_cpumask_zero(&mask);
	for (i = 0; i < CPU_SETSIZE; i++) {
		if (CPU_ISSET(i, &original_cpuset)) {
			odp_cpumask_set(&mask, i);
			break;
		}
	}
	masklen = odp_cpumask_to_str(&mask, mask_str, ODP_CPUMASK_STR_SIZE);

	if (masklen < 0) {
		ODP_ERR("CPU mask error: d\n", masklen);
		return -1;
	}

	mem_str_len = snprintf(NULL, 0, "%d", DPDK_MEMORY_MB);

	cmdline = getenv("ODP_PKTIO_DPDK_PARAMS");
	if (cmdline == NULL)
		cmdline = "";

	/* masklen includes the terminating null as well */
	cmd_len = strlen("odpdpdk -c -m ") + masklen + mem_str_len +
			strlen(cmdline) + strlen("  ");

	char full_cmd[cmd_len];

	/* first argument is facility log, simply bind it to odpdpdk for now.*/
	cmd_len = snprintf(full_cmd, cmd_len, "odpdpdk -c %s -m %d %s",
			   mask_str, DPDK_MEMORY_MB, cmdline);

	for (i = 0, dpdk_argc = 1; i < cmd_len; ++i) {
		if (isspace(full_cmd[i]))
			++dpdk_argc;
	}

	char *dpdk_argv[dpdk_argc];

	dpdk_argc = rte_strsplit(full_cmd, strlen(full_cmd), dpdk_argv,
				 dpdk_argc, ' ');
	for (i = 0; i < dpdk_argc; ++i)
		ODP_DBG("arg[%d]: %s\n", i, dpdk_argv[i]);

	i = rte_eal_init(dpdk_argc, dpdk_argv);

	if (i < 0) {
		ODP_ERR("Cannot init the Intel DPDK EAL!\n");
		return -1;
	} else if (i + 1 != dpdk_argc) {
		ODP_DBG("Some DPDK args were not processed!\n");
		ODP_DBG("Passed: %d Consumed %d\n", dpdk_argc, i + 1);
	}
	ODP_DBG("rte_eal_init OK\n");

	rte_set_log_level(RTE_LOG_WARNING);

	i = pthread_setaffinity_np(pthread_self(), sizeof(cpu_set_t),
				   &original_cpuset);
	if (i)
		ODP_ERR("Failed to reset thread affinity: %d\n", i);

	cfg = rte_eal_get_configuration();
	for (i = 0; i < RTE_MAX_LCORE; i++)
		cfg->lcore_role[i] = ROLE_RTE;

	return 0;
}

/* Placeholder for DPDK global init */
static int dpdk_pktio_init_global(void)
{
	if (getenv("ODP_PKTIO_DISABLE_DPDK")) {
		ODP_PRINT("PKTIO: dpdk pktio skipped,"
			  " enabled export ODP_PKTIO_DISABLE_DPDK=1.\n");
		disable_pktio = 1;
	} else  {
		ODP_PRINT("PKTIO: initialized dpdk pktio,"
			  " use export ODP_PKTIO_DISABLE_DPDK=1 to disable.\n");
	}
	return 0;
}

static int dpdk_pktio_init_local(void)
{
	int cpu;

	cpu = sched_getcpu();
	if (cpu < 0) {
		ODP_ERR("getcpu failed\n");
		return -1;
	}

	RTE_PER_LCORE(_lcore_id) = cpu;

	return 0;
}

static int dpdk_input_queues_config(pktio_entry_t *pktio_entry,
				    const odp_pktin_queue_param_t *p)
{
	odp_pktin_mode_t mode = pktio_entry->s.param.in_mode;
	odp_bool_t lockless;

	/**
	 * Scheduler synchronizes input queue polls. Only single thread
	 * at a time polls a queue */
	if (mode == ODP_PKTIN_MODE_SCHED ||
	    p->op_mode == ODP_PKTIO_OP_MT_UNSAFE)
		lockless = 1;
	else
		lockless = 0;

	if (p->hash_enable && p->num_queues > 1)
		pktio_entry->s.pkt_dpdk.hash = p->hash_proto;

	pktio_entry->s.pkt_dpdk.lockless_rx = lockless;

	return 0;
}

static int dpdk_output_queues_config(pktio_entry_t *pktio_entry,
				     const odp_pktout_queue_param_t *p)
{
	pkt_dpdk_t *pkt_dpdk = &pktio_entry->s.pkt_dpdk;
	odp_bool_t lockless;

	if (p->op_mode == ODP_PKTIO_OP_MT_UNSAFE)
		lockless = 1;
	else
		lockless = 0;

	pkt_dpdk->lockless_tx = lockless;

	return 0;
}

static void dpdk_init_capability(pktio_entry_t *pktio_entry,
				 struct rte_eth_dev_info *dev_info)
{
	pkt_dpdk_t *pkt_dpdk = &pktio_entry->s.pkt_dpdk;
	odp_pktio_capability_t *capa = &pkt_dpdk->capa;

	memset(dev_info, 0, sizeof(struct rte_eth_dev_info));
	memset(capa, 0, sizeof(odp_pktio_capability_t));

	rte_eth_dev_info_get(pkt_dpdk->port_id, dev_info);
	capa->max_input_queues = RTE_MIN(dev_info->max_rx_queues,
					 PKTIO_MAX_QUEUES);
	capa->max_output_queues = RTE_MIN(dev_info->max_tx_queues,
					  PKTIO_MAX_QUEUES);
	capa->set_op.op.promisc_mode = 1;

	odp_pktio_config_init(&capa->config);
	capa->config.pktin.bit.ts_all = 1;
	capa->config.pktin.bit.ts_ptp = 1;
}

static int dpdk_open(odp_pktio_t id ODP_UNUSED,
		     pktio_entry_t *pktio_entry,
		     const char *netdev,
		     odp_pool_t pool)
{
	pkt_dpdk_t *pkt_dpdk = &pktio_entry->s.pkt_dpdk;
	struct rte_eth_dev_info dev_info;
	struct rte_mempool *pkt_pool;
	odp_pool_info_t pool_info;
	uint16_t data_room;
	uint32_t mtu;
	int i;

	if (disable_pktio)
		return -1;

	if (pool == ODP_POOL_INVALID)
		return -1;

	if (!dpdk_netdev_is_valid(netdev)) {
		ODP_ERR("Invalid dpdk netdev: %s\n", netdev);
		return -1;
	}

	/* Initialize DPDK here instead of odp_init_global() to enable running
	 * 'make check' without root privileges */
	if (dpdk_initialized == 0) {
		dpdk_pktio_init();
		dpdk_initialized = 1;
	}

	/* Init pktio entry */
	memset(pkt_dpdk, 0, sizeof(*pkt_dpdk));

	pkt_dpdk->pool = pool;
	pkt_dpdk->port_id = atoi(netdev);

	snprintf(pkt_dpdk->pool_name, sizeof(pkt_dpdk->pool_name), "pktpool_%s",
		 netdev);

	if (rte_eth_dev_count() == 0) {
		ODP_ERR("No DPDK ports found\n");
		return -1;
	}

	if (odp_pool_info(pool, &pool_info) < 0) {
		ODP_ERR("Failed to read pool info\n");
		return -1;
	}

	dpdk_init_capability(pktio_entry, &dev_info);

	mtu = dpdk_mtu_get(pktio_entry);
	if (mtu == 0) {
		ODP_ERR("Failed to read interface MTU\n");
		return -1;
	}
	pkt_dpdk->mtu = mtu + _ODP_ETHHDR_LEN;

	/* Some DPDK PMD virtual devices, like PCAP, do not support promisc
	 * mode change. Use system call for them. */
	rte_eth_promiscuous_enable(pkt_dpdk->port_id);
	if (!rte_eth_promiscuous_get(pkt_dpdk->port_id))
		pkt_dpdk->vdev_sysc_promisc = 1;
	rte_eth_promiscuous_disable(pkt_dpdk->port_id);

	if (!strcmp(dev_info.driver_name, "rte_ixgbe_pmd"))
		pkt_dpdk->min_rx_burst = DPDK_IXGBE_MIN_RX_BURST;
	else
		pkt_dpdk->min_rx_burst = 0;

	pkt_pool = rte_pktmbuf_pool_create(pkt_dpdk->pool_name, DPDK_NB_MBUF,
					   DPDK_MEMPOOL_CACHE_SIZE, 0,
					   DPDK_MBUF_BUF_SIZE, rte_socket_id());
	if (pkt_pool == NULL) {
		ODP_ERR("Cannot init mbuf packet pool\n");
		return -1;
	}
	pkt_dpdk->pkt_pool = pkt_pool;

	data_room = rte_pktmbuf_data_room_size(pkt_dpdk->pkt_pool) -
			RTE_PKTMBUF_HEADROOM;
	pkt_dpdk->data_room = RTE_MIN(pool_info.params.pkt.len, data_room);

	/* Mbuf chaining not yet supported */
	 pkt_dpdk->mtu = RTE_MIN(pkt_dpdk->mtu, pkt_dpdk->data_room);

	for (i = 0; i < PKTIO_MAX_QUEUES; i++) {
		odp_ticketlock_init(&pkt_dpdk->rx_lock[i]);
		odp_ticketlock_init(&pkt_dpdk->tx_lock[i]);
	}

	rte_eth_stats_reset(pkt_dpdk->port_id);

	return 0;
}

static int dpdk_start(pktio_entry_t *pktio_entry)
{
	pkt_dpdk_t *pkt_dpdk = &pktio_entry->s.pkt_dpdk;
	uint8_t port_id = pkt_dpdk->port_id;
	int ret;
	unsigned i;

	/* DPDK doesn't support nb_rx_q/nb_tx_q being 0 */
	if (!pktio_entry->s.num_in_queue)
		pktio_entry->s.num_in_queue = 1;
	if (!pktio_entry->s.num_out_queue)
		pktio_entry->s.num_out_queue = 1;

	/* init port */
	if (dpdk_setup_port(pktio_entry)) {
		ODP_ERR("Failed to configure device\n");
		return -1;
	}
	/* Init TX queues */
	for (i = 0; i < pktio_entry->s.num_out_queue; i++) {
		ret = rte_eth_tx_queue_setup(port_id, i, DPDK_NM_TX_DESC,
					     rte_eth_dev_socket_id(port_id),
					     NULL);
		if (ret < 0) {
			ODP_ERR("Queue setup failed: err=%d, port=%" PRIu8 "\n",
				ret, port_id);
			return -1;
		}
	}
	/* Init RX queues */
	for (i = 0; i < pktio_entry->s.num_in_queue; i++) {
		ret = rte_eth_rx_queue_setup(port_id, i, DPDK_NM_RX_DESC,
					     rte_eth_dev_socket_id(port_id),
					     NULL, pkt_dpdk->pkt_pool);
		if (ret < 0) {
			ODP_ERR("Queue setup failed: err=%d, port=%" PRIu8 "\n",
				ret, port_id);
			return -1;
		}
	}
	/* Start device */
	ret = rte_eth_dev_start(port_id);
	if (ret < 0) {
		ODP_ERR("Device start failed: err=%d, port=%" PRIu8 "\n",
			ret, port_id);
		return -1;
	}

	return 0;
}

static int dpdk_stop(pktio_entry_t *pktio_entry)
{
	rte_eth_dev_stop(pktio_entry->s.pkt_dpdk.port_id);

	return 0;
}

static inline int mbuf_to_pkt(pktio_entry_t *pktio_entry,
			      odp_packet_t pkt_table[],
			      struct rte_mbuf *mbuf_table[],
			      uint16_t mbuf_num, odp_time_t *ts)
{
	odp_packet_t pkt;
	odp_packet_hdr_t *pkt_hdr;
	uint16_t pkt_len;
	struct rte_mbuf *mbuf;
	void *buf;
	int i, j;
	int nb_pkts = 0;
	int alloc_len, num;
	odp_pool_t pool = pktio_entry->s.pkt_dpdk.pool;

	/* Allocate maximum sized packets */
	alloc_len = pktio_entry->s.pkt_dpdk.data_room;

	num = packet_alloc_multi(pool, alloc_len, pkt_table, mbuf_num);
	if (num != mbuf_num) {
		ODP_DBG("packet_alloc_multi() unable to allocate all packets: "
			"%d/%" PRIu16 " allocated\n", num, mbuf_num);
		for (i = num; i < mbuf_num; i++)
			rte_pktmbuf_free(mbuf_table[i]);
	}

	for (i = 0; i < num; i++) {
		odp_packet_hdr_t parsed_hdr;

		mbuf = mbuf_table[i];
		if (odp_unlikely(mbuf->nb_segs != 1)) {
			ODP_ERR("Segmented buffers not supported\n");
			goto fail;
		}

		buf = rte_pktmbuf_mtod(mbuf, char *);
		odp_prefetch(buf);

		pkt_len = rte_pktmbuf_pkt_len(mbuf);

		if (pktio_cls_enabled(pktio_entry)) {
			if (cls_classify_packet(pktio_entry,
						(const uint8_t *)buf,
						pkt_len, pkt_len, &pool,
						&parsed_hdr))
				goto fail;
		}

		pkt     = pkt_table[i];
		pkt_hdr = odp_packet_hdr(pkt);
		pull_tail(pkt_hdr, alloc_len - pkt_len);

		/* For now copy the data in the mbuf,
		   worry about zero-copy later */
		if (odp_packet_copy_from_mem(pkt, 0, pkt_len, buf) != 0)
			goto fail;

		pkt_hdr->input = pktio_entry->s.handle;

		if (pktio_cls_enabled(pktio_entry))
			copy_packet_cls_metadata(&parsed_hdr, pkt_hdr);
		else
			packet_parse_layer(pkt_hdr,
					   pktio_entry->s.config.parser.layer);

		if (mbuf->ol_flags & PKT_RX_RSS_HASH)
			odp_packet_flow_hash_set(pkt, mbuf->hash.rss);

		packet_set_ts(pkt_hdr, ts);

		pkt_table[nb_pkts++] = pkt;

		rte_pktmbuf_free(mbuf);
	}

	return nb_pkts;

fail:
	odp_packet_free_multi(&pkt_table[i], num - i);

	for (j = i; j < num; j++)
		rte_pktmbuf_free(mbuf_table[j]);

	return (i > 0 ? i : -1);
}

static inline int pkt_to_mbuf(pktio_entry_t *pktio_entry,
			      struct rte_mbuf *mbuf_table[],
			      const odp_packet_t pkt_table[], uint16_t num)
{
	pkt_dpdk_t *pkt_dpdk = &pktio_entry->s.pkt_dpdk;
	int i, j;
	char *data;
	uint16_t pkt_len;

	if (odp_unlikely((rte_pktmbuf_alloc_bulk(pkt_dpdk->pkt_pool,
						 mbuf_table, num)))) {
		ODP_ERR("Failed to alloc mbuf\n");
		return 0;
	}
	for (i = 0; i < num; i++) {
		pkt_len = _odp_packet_len(pkt_table[i]);

		if (pkt_len > pkt_dpdk->mtu) {
			if (i == 0)
				__odp_errno = EMSGSIZE;
			goto fail;
		}

		/* Packet always fits in mbuf */
		data = rte_pktmbuf_append(mbuf_table[i], pkt_len);

		odp_packet_copy_to_mem(pkt_table[i], 0, pkt_len, data);
	}
	return i;

fail:
	for (j = i; j < num; j++)
		rte_pktmbuf_free(mbuf_table[j]);

	return i;
}

static int dpdk_recv(pktio_entry_t *pktio_entry, int index,
		     odp_packet_t pkt_table[], int num)
{
	pkt_dpdk_t *pkt_dpdk = &pktio_entry->s.pkt_dpdk;
	pkt_cache_t *rx_cache = &pkt_dpdk->rx_cache[index];
	odp_time_t ts_val;
	odp_time_t *ts = NULL;
	int nb_rx;
	struct rte_mbuf *rx_mbufs[num];
	int i;
	unsigned cache_idx;

	if (odp_unlikely(pktio_entry->s.state != PKTIO_STATE_STARTED))
		return 0;

	if (!pkt_dpdk->lockless_rx)
		odp_ticketlock_lock(&pkt_dpdk->rx_lock[index]);
	/**
	 * ixgbe_pmd has a minimum supported RX burst size ('min_rx_burst'). If
	 * 'num' < 'min_rx_burst', 'min_rx_burst' is used as rte_eth_rx_burst()
	 * argument and the possibly received extra packets are cached for the
	 * next dpdk_recv_queue() call to use.
	 *
	 * Either use cached packets or receive new ones. Not both during the
	 * same call. */
	if (rx_cache->s.count > 0) {
		for (i = 0; i < num && rx_cache->s.count; i++) {
			rx_mbufs[i] = rx_cache->s.pkt[rx_cache->s.idx];
			rx_cache->s.idx++;
			rx_cache->s.count--;
		}
		nb_rx = i;
	} else if ((unsigned)num < pkt_dpdk->min_rx_burst) {
		struct rte_mbuf *new_mbufs[pkt_dpdk->min_rx_burst];

		nb_rx = rte_eth_rx_burst(pktio_entry->s.pkt_dpdk.port_id, index,
					 new_mbufs, pkt_dpdk->min_rx_burst);
		rx_cache->s.idx = 0;
		for (i = 0; i < nb_rx; i++) {
			if (i < num) {
				rx_mbufs[i] = new_mbufs[i];
			} else {
				cache_idx = rx_cache->s.count;
				rx_cache->s.pkt[cache_idx] = new_mbufs[i];
				rx_cache->s.count++;
			}
		}
		nb_rx = RTE_MIN(num, nb_rx);

	} else {
		nb_rx = rte_eth_rx_burst(pktio_entry->s.pkt_dpdk.port_id, index,
					 rx_mbufs, num);
	}

	if (!pkt_dpdk->lockless_rx)
		odp_ticketlock_unlock(&pkt_dpdk->rx_lock[index]);

	if (nb_rx > 0) {
		if (pktio_entry->s.config.pktin.bit.ts_all ||
		    pktio_entry->s.config.pktin.bit.ts_ptp) {
			ts_val = odp_time_global();
			ts = &ts_val;
		}
		nb_rx = mbuf_to_pkt(pktio_entry, pkt_table, rx_mbufs, nb_rx,
				    ts);
	}

	return nb_rx;
}

static int dpdk_send(pktio_entry_t *pktio_entry, int index,
		     const odp_packet_t pkt_table[], int num)
{
	struct rte_mbuf *tx_mbufs[num];
	pkt_dpdk_t *pkt_dpdk = &pktio_entry->s.pkt_dpdk;
	int tx_pkts;
	int i;
	int mbufs;

	if (odp_unlikely(pktio_entry->s.state != PKTIO_STATE_STARTED))
		return 0;

	mbufs = pkt_to_mbuf(pktio_entry, tx_mbufs, pkt_table, num);

	if (!pkt_dpdk->lockless_tx)
		odp_ticketlock_lock(&pkt_dpdk->tx_lock[index]);

	tx_pkts = rte_eth_tx_burst(pkt_dpdk->port_id, index,
				   tx_mbufs, mbufs);

	if (!pkt_dpdk->lockless_tx)
		odp_ticketlock_unlock(&pkt_dpdk->tx_lock[index]);

	if (odp_unlikely(tx_pkts < num)) {
		for (i = tx_pkts; i < mbufs; i++)
			rte_pktmbuf_free(tx_mbufs[i]);
	}

	if (odp_unlikely(tx_pkts == 0)) {
		if (__odp_errno != 0)
			return -1;
	} else {
		odp_packet_free_multi(pkt_table, tx_pkts);
	}

	return tx_pkts;
}

static int dpdk_mac_addr_get(pktio_entry_t *pktio_entry, void *mac_addr)
{
	rte_eth_macaddr_get(pktio_entry->s.pkt_dpdk.port_id,
			    (struct ether_addr *)mac_addr);
	return ETH_ALEN;
}

static int dpdk_promisc_mode_set(pktio_entry_t *pktio_entry, odp_bool_t enable)
{
	uint8_t port_id = pktio_entry->s.pkt_dpdk.port_id;

	if (pktio_entry->s.pkt_dpdk.vdev_sysc_promisc)
		return dpdk_vdev_promisc_mode_set(port_id, enable);

	if (enable)
		rte_eth_promiscuous_enable(port_id);
	else
		rte_eth_promiscuous_disable(port_id);

	return 0;
}

static int dpdk_promisc_mode_get(pktio_entry_t *pktio_entry)
{
	uint8_t port_id = pktio_entry->s.pkt_dpdk.port_id;

	if (pktio_entry->s.pkt_dpdk.vdev_sysc_promisc)
		return dpdk_vdev_promisc_mode_get(port_id);
	else
		return rte_eth_promiscuous_get(port_id);
}

static int dpdk_capability(pktio_entry_t *pktio_entry,
			   odp_pktio_capability_t *capa)
{
	*capa = pktio_entry->s.pkt_dpdk.capa;
	return 0;
}

static int dpdk_link_status(pktio_entry_t *pktio_entry)
{
	struct rte_eth_link link;

	memset(&link, 0, sizeof(struct rte_eth_link));

	rte_eth_link_get_nowait(pktio_entry->s.pkt_dpdk.port_id, &link);

	return link.link_status;
}

static void stats_convert(const struct rte_eth_stats *rte_stats,
			  odp_pktio_stats_t *stats)
{
	memset(stats, 0, sizeof(odp_pktio_stats_t));

	stats->in_octets = rte_stats->ibytes;
	stats->in_discards = rte_stats->imissed;
	stats->in_errors = rte_stats->ierrors;
	stats->out_octets = rte_stats->obytes;
	stats->out_errors = rte_stats->oerrors;
}

static int dpdk_stats(pktio_entry_t *pktio_entry, odp_pktio_stats_t *stats)
{
	int ret;
	struct rte_eth_stats rte_stats;

	ret = rte_eth_stats_get(pktio_entry->s.pkt_dpdk.port_id, &rte_stats);

	if (ret == 0) {
		stats_convert(&rte_stats, stats);
		return 0;
	}
	return -1;
}

static int dpdk_stats_reset(pktio_entry_t *pktio_entry)
{
	rte_eth_stats_reset(pktio_entry->s.pkt_dpdk.port_id);
	return 0;
}

const pktio_if_ops_t dpdk_pktio_ops = {
	.name = "dpdk",
	.init_global = dpdk_pktio_init_global,
	.init_local = dpdk_pktio_init_local,
	.term = NULL,
	.open = dpdk_open,
	.close = dpdk_close,
	.start = dpdk_start,
	.stop = dpdk_stop,
	.stats = dpdk_stats,
	.stats_reset = dpdk_stats_reset,
	.recv = dpdk_recv,
	.send = dpdk_send,
	.link_status = dpdk_link_status,
	.mtu_get = dpdk_mtu_get,
	.promisc_mode_set = dpdk_promisc_mode_set,
	.promisc_mode_get = dpdk_promisc_mode_get,
	.mac_get = dpdk_mac_addr_get,
	.capability = dpdk_capability,
	.pktin_ts_res = NULL,
	.pktin_ts_from_ns = NULL,
	.config = NULL,
	.input_queues_config = dpdk_input_queues_config,
	.output_queues_config = dpdk_output_queues_config
};

#endif /* ODP_PKTIO_DPDK */