/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright 2008-2017 Cisco Systems, Inc.  All rights reserved.
 * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
 */

#include <stdio.h>
#include <stdint.h>

#include <rte_dev.h>
#include <rte_pci.h>
#include <rte_bus_pci.h>
#include <rte_ethdev_driver.h>
#include <rte_ethdev_pci.h>
#include <rte_kvargs.h>
#include <rte_string_fns.h>

#include "vnic_intr.h"
#include "vnic_cq.h"
#include "vnic_wq.h"
#include "vnic_rq.h"
#include "vnic_enet.h"
#include "enic.h"

int enicpmd_logtype_init;
int enicpmd_logtype_flow;

#define PMD_INIT_LOG(level, fmt, args...) \
	rte_log(RTE_LOG_ ## level, enicpmd_logtype_init, \
		"%s" fmt "\n", __func__, ##args)

#define ENICPMD_FUNC_TRACE() PMD_INIT_LOG(DEBUG, " >>")

/*
 * The set of PCI devices this driver supports
 */
#define CISCO_PCI_VENDOR_ID 0x1137
static const struct rte_pci_id pci_id_enic_map[] = {
	{ RTE_PCI_DEVICE(CISCO_PCI_VENDOR_ID, PCI_DEVICE_ID_CISCO_VIC_ENET) },
	{ RTE_PCI_DEVICE(CISCO_PCI_VENDOR_ID, PCI_DEVICE_ID_CISCO_VIC_ENET_VF) },
	{.vendor_id = 0, /* sentinel */},
};

#define ENIC_DEVARG_DISABLE_OVERLAY "disable-overlay"

RTE_INIT(enicpmd_init_log);
static void
enicpmd_init_log(void)
{
	enicpmd_logtype_init = rte_log_register("pmd.net.enic.init");
	if (enicpmd_logtype_init >= 0)
		rte_log_set_level(enicpmd_logtype_init, RTE_LOG_NOTICE);
	enicpmd_logtype_flow = rte_log_register("pmd.net.enic.flow");
	if (enicpmd_logtype_flow >= 0)
		rte_log_set_level(enicpmd_logtype_flow, RTE_LOG_NOTICE);
}

static int
enicpmd_fdir_ctrl_func(struct rte_eth_dev *eth_dev,
			enum rte_filter_op filter_op, void *arg)
{
	struct enic *enic = pmd_priv(eth_dev);
	int ret = 0;

	ENICPMD_FUNC_TRACE();
	if (filter_op == RTE_ETH_FILTER_NOP)
		return 0;

	if (arg == NULL && filter_op != RTE_ETH_FILTER_FLUSH)
		return -EINVAL;

	switch (filter_op) {
	case RTE_ETH_FILTER_ADD:
	case RTE_ETH_FILTER_UPDATE:
		ret = enic_fdir_add_fltr(enic,
			(struct rte_eth_fdir_filter *)arg);
		break;

	case RTE_ETH_FILTER_DELETE:
		ret = enic_fdir_del_fltr(enic,
			(struct rte_eth_fdir_filter *)arg);
		break;

	case RTE_ETH_FILTER_STATS:
		enic_fdir_stats_get(enic, (struct rte_eth_fdir_stats *)arg);
		break;

	case RTE_ETH_FILTER_FLUSH:
		dev_warning(enic, "unsupported operation %u", filter_op);
		ret = -ENOTSUP;
		break;
	case RTE_ETH_FILTER_INFO:
		enic_fdir_info_get(enic, (struct rte_eth_fdir_info *)arg);
		break;
	default:
		dev_err(enic, "unknown operation %u", filter_op);
		ret = -EINVAL;
		break;
	}
	return ret;
}

static int
enicpmd_dev_filter_ctrl(struct rte_eth_dev *dev,
		     enum rte_filter_type filter_type,
		     enum rte_filter_op filter_op,
		     void *arg)
{
	int ret = 0;

	ENICPMD_FUNC_TRACE();

	switch (filter_type) {
	case RTE_ETH_FILTER_GENERIC:
		if (filter_op != RTE_ETH_FILTER_GET)
			return -EINVAL;
		*(const void **)arg = &enic_flow_ops;
		break;
	case RTE_ETH_FILTER_FDIR:
		ret = enicpmd_fdir_ctrl_func(dev, filter_op, arg);
		break;
	default:
		dev_warning(enic, "Filter type (%d) not supported",
			filter_type);
		ret = -EINVAL;
		break;
	}

	return ret;
}

static void enicpmd_dev_tx_queue_release(void *txq)
{
	ENICPMD_FUNC_TRACE();

	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
		return;

	enic_free_wq(txq);
}

static int enicpmd_dev_setup_intr(struct enic *enic)
{
	int ret;
	unsigned int index;

	ENICPMD_FUNC_TRACE();

	/* Are we done with the init of all the queues? */
	for (index = 0; index < enic->cq_count; index++) {
		if (!enic->cq[index].ctrl)
			break;
	}
	if (enic->cq_count != index)
		return 0;
	for (index = 0; index < enic->wq_count; index++) {
		if (!enic->wq[index].ctrl)
			break;
	}
	if (enic->wq_count != index)
		return 0;
	/* check start of packet (SOP) RQs only in case scatter is disabled. */
	for (index = 0; index < enic->rq_count; index++) {
		if (!enic->rq[enic_rte_rq_idx_to_sop_idx(index)].ctrl)
			break;
	}
	if (enic->rq_count != index)
		return 0;

	ret = enic_alloc_intr_resources(enic);
	if (ret) {
		dev_err(enic, "alloc intr failed\n");
		return ret;
	}
	enic_init_vnic_resources(enic);

	ret = enic_setup_finish(enic);
	if (ret)
		dev_err(enic, "setup could not be finished\n");

	return ret;
}

static int enicpmd_dev_tx_queue_setup(struct rte_eth_dev *eth_dev,
	uint16_t queue_idx,
	uint16_t nb_desc,
	unsigned int socket_id,
	__rte_unused const struct rte_eth_txconf *tx_conf)
{
	int ret;
	struct enic *enic = pmd_priv(eth_dev);

	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
		return -E_RTE_SECONDARY;

	ENICPMD_FUNC_TRACE();
	RTE_ASSERT(queue_idx < enic->conf_wq_count);
	eth_dev->data->tx_queues[queue_idx] = (void *)&enic->wq[queue_idx];

	ret = enic_alloc_wq(enic, queue_idx, socket_id, nb_desc);
	if (ret) {
		dev_err(enic, "error in allocating wq\n");
		return ret;
	}

	return enicpmd_dev_setup_intr(enic);
}

static int enicpmd_dev_tx_queue_start(struct rte_eth_dev *eth_dev,
	uint16_t queue_idx)
{
	struct enic *enic = pmd_priv(eth_dev);

	ENICPMD_FUNC_TRACE();

	enic_start_wq(enic, queue_idx);

	return 0;
}

static int enicpmd_dev_tx_queue_stop(struct rte_eth_dev *eth_dev,
	uint16_t queue_idx)
{
	int ret;
	struct enic *enic = pmd_priv(eth_dev);

	ENICPMD_FUNC_TRACE();

	ret = enic_stop_wq(enic, queue_idx);
	if (ret)
		dev_err(enic, "error in stopping wq %d\n", queue_idx);

	return ret;
}

static int enicpmd_dev_rx_queue_start(struct rte_eth_dev *eth_dev,
	uint16_t queue_idx)
{
	struct enic *enic = pmd_priv(eth_dev);

	ENICPMD_FUNC_TRACE();

	enic_start_rq(enic, queue_idx);

	return 0;
}

static int enicpmd_dev_rx_queue_stop(struct rte_eth_dev *eth_dev,
	uint16_t queue_idx)
{
	int ret;
	struct enic *enic = pmd_priv(eth_dev);

	ENICPMD_FUNC_TRACE();

	ret = enic_stop_rq(enic, queue_idx);
	if (ret)
		dev_err(enic, "error in stopping rq %d\n", queue_idx);

	return ret;
}

static void enicpmd_dev_rx_queue_release(void *rxq)
{
	ENICPMD_FUNC_TRACE();

	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
		return;

	enic_free_rq(rxq);
}

static uint32_t enicpmd_dev_rx_queue_count(struct rte_eth_dev *dev,
					   uint16_t rx_queue_id)
{
	struct enic *enic = pmd_priv(dev);
	uint32_t queue_count = 0;
	struct vnic_cq *cq;
	uint32_t cq_tail;
	uint16_t cq_idx;
	int rq_num;

	rq_num = enic_rte_rq_idx_to_sop_idx(rx_queue_id);
	cq = &enic->cq[enic_cq_rq(enic, rq_num)];
	cq_idx = cq->to_clean;

	cq_tail = ioread32(&cq->ctrl->cq_tail);

	if (cq_tail < cq_idx)
		cq_tail += cq->ring.desc_count;

	queue_count = cq_tail - cq_idx;

	return queue_count;
}

static int enicpmd_dev_rx_queue_setup(struct rte_eth_dev *eth_dev,
	uint16_t queue_idx,
	uint16_t nb_desc,
	unsigned int socket_id,
	const struct rte_eth_rxconf *rx_conf,
	struct rte_mempool *mp)
{
	int ret;
	struct enic *enic = pmd_priv(eth_dev);

	ENICPMD_FUNC_TRACE();

	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
		return -E_RTE_SECONDARY;
	RTE_ASSERT(enic_rte_rq_idx_to_sop_idx(queue_idx) < enic->conf_rq_count);
	eth_dev->data->rx_queues[queue_idx] =
		(void *)&enic->rq[enic_rte_rq_idx_to_sop_idx(queue_idx)];

	ret = enic_alloc_rq(enic, queue_idx, socket_id, mp, nb_desc,
			    rx_conf->rx_free_thresh);
	if (ret) {
		dev_err(enic, "error in allocating rq\n");
		return ret;
	}

	return enicpmd_dev_setup_intr(enic);
}

static int enicpmd_vlan_offload_set(struct rte_eth_dev *eth_dev, int mask)
{
	struct enic *enic = pmd_priv(eth_dev);
	uint64_t offloads;

	ENICPMD_FUNC_TRACE();

	offloads = eth_dev->data->dev_conf.rxmode.offloads;
	if (mask & ETH_VLAN_STRIP_MASK) {
		if (offloads & DEV_RX_OFFLOAD_VLAN_STRIP)
			enic->ig_vlan_strip_en = 1;
		else
			enic->ig_vlan_strip_en = 0;
	}

	if ((mask & ETH_VLAN_FILTER_MASK) &&
	    (offloads & DEV_RX_OFFLOAD_VLAN_FILTER)) {
		dev_warning(enic,
			"Configuration of VLAN filter is not supported\n");
	}

	if ((mask & ETH_VLAN_EXTEND_MASK) &&
	    (offloads & DEV_RX_OFFLOAD_VLAN_EXTEND)) {
		dev_warning(enic,
			"Configuration of extended VLAN is not supported\n");
	}

	return enic_set_vlan_strip(enic);
}

static int enicpmd_dev_configure(struct rte_eth_dev *eth_dev)
{
	int ret;
	int mask;
	struct enic *enic = pmd_priv(eth_dev);

	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
		return -E_RTE_SECONDARY;

	ENICPMD_FUNC_TRACE();
	ret = enic_set_vnic_res(enic);
	if (ret) {
		dev_err(enic, "Set vNIC resource num  failed, aborting\n");
		return ret;
	}

	enic->hw_ip_checksum = !!(eth_dev->data->dev_conf.rxmode.offloads &
				  DEV_RX_OFFLOAD_CHECKSUM);
	/* All vlan offload masks to apply the current settings */
	mask = ETH_VLAN_STRIP_MASK |
		ETH_VLAN_FILTER_MASK |
		ETH_VLAN_EXTEND_MASK;
	ret = enicpmd_vlan_offload_set(eth_dev, mask);
	if (ret) {
		dev_err(enic, "Failed to configure VLAN offloads\n");
		return ret;
	}
	/*
	 * Initialize RSS with the default reta and key. If the user key is
	 * given (rx_adv_conf.rss_conf.rss_key), will use that instead of the
	 * default key.
	 */
	return enic_init_rss_nic_cfg(enic);
}

/* Start the device.
 * It returns 0 on success.
 */
static int enicpmd_dev_start(struct rte_eth_dev *eth_dev)
{
	struct enic *enic = pmd_priv(eth_dev);

	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
		return -E_RTE_SECONDARY;

	ENICPMD_FUNC_TRACE();
	return enic_enable(enic);
}

/*
 * Stop device: disable rx and tx functions to allow for reconfiguring.
 */
static void enicpmd_dev_stop(struct rte_eth_dev *eth_dev)
{
	struct rte_eth_link link;
	struct enic *enic = pmd_priv(eth_dev);

	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
		return;

	ENICPMD_FUNC_TRACE();
	enic_disable(enic);

	memset(&link, 0, sizeof(link));
	rte_eth_linkstatus_set(eth_dev, &link);
}

/*
 * Stop device.
 */
static void enicpmd_dev_close(struct rte_eth_dev *eth_dev)
{
	struct enic *enic = pmd_priv(eth_dev);

	ENICPMD_FUNC_TRACE();
	enic_remove(enic);
}

static int enicpmd_dev_link_update(struct rte_eth_dev *eth_dev,
	__rte_unused int wait_to_complete)
{
	struct enic *enic = pmd_priv(eth_dev);

	ENICPMD_FUNC_TRACE();
	return enic_link_update(enic);
}

static int enicpmd_dev_stats_get(struct rte_eth_dev *eth_dev,
	struct rte_eth_stats *stats)
{
	struct enic *enic = pmd_priv(eth_dev);

	ENICPMD_FUNC_TRACE();
	return enic_dev_stats_get(enic, stats);
}

static void enicpmd_dev_stats_reset(struct rte_eth_dev *eth_dev)
{
	struct enic *enic = pmd_priv(eth_dev);

	ENICPMD_FUNC_TRACE();
	enic_dev_stats_clear(enic);
}

static void enicpmd_dev_info_get(struct rte_eth_dev *eth_dev,
	struct rte_eth_dev_info *device_info)
{
	struct enic *enic = pmd_priv(eth_dev);

	ENICPMD_FUNC_TRACE();
	/* Scattered Rx uses two receive queues per rx queue exposed to dpdk */
	device_info->max_rx_queues = enic->conf_rq_count / 2;
	device_info->max_tx_queues = enic->conf_wq_count;
	device_info->min_rx_bufsize = ENIC_MIN_MTU;
	/* "Max" mtu is not a typo. HW receives packet sizes up to the
	 * max mtu regardless of the current mtu (vNIC's mtu). vNIC mtu is
	 * a hint to the driver to size receive buffers accordingly so that
	 * larger-than-vnic-mtu packets get truncated.. For DPDK, we let
	 * the user decide the buffer size via rxmode.max_rx_pkt_len, basically
	 * ignoring vNIC mtu.
	 */
	device_info->max_rx_pktlen = enic_mtu_to_max_rx_pktlen(enic->max_mtu);
	device_info->max_mac_addrs = ENIC_MAX_MAC_ADDR;
	device_info->rx_offload_capa = enic->rx_offload_capa;
	device_info->tx_offload_capa = enic->tx_offload_capa;
	device_info->default_rxconf = (struct rte_eth_rxconf) {
		.rx_free_thresh = ENIC_DEFAULT_RX_FREE_THRESH
	};
	device_info->reta_size = enic->reta_size;
	device_info->hash_key_size = enic->hash_key_size;
	device_info->flow_type_rss_offloads = enic->flow_type_rss_offloads;
}

static const uint32_t *enicpmd_dev_supported_ptypes_get(struct rte_eth_dev *dev)
{
	static const uint32_t ptypes[] = {
		RTE_PTYPE_L2_ETHER,
		RTE_PTYPE_L2_ETHER_VLAN,
		RTE_PTYPE_L3_IPV4_EXT_UNKNOWN,
		RTE_PTYPE_L3_IPV6_EXT_UNKNOWN,
		RTE_PTYPE_L4_TCP,
		RTE_PTYPE_L4_UDP,
		RTE_PTYPE_L4_FRAG,
		RTE_PTYPE_L4_NONFRAG,
		RTE_PTYPE_UNKNOWN
	};

	if (dev->rx_pkt_burst == enic_recv_pkts)
		return ptypes;
	return NULL;
}

static void enicpmd_dev_promiscuous_enable(struct rte_eth_dev *eth_dev)
{
	struct enic *enic = pmd_priv(eth_dev);

	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
		return;

	ENICPMD_FUNC_TRACE();

	enic->promisc = 1;
	enic_add_packet_filter(enic);
}

static void enicpmd_dev_promiscuous_disable(struct rte_eth_dev *eth_dev)
{
	struct enic *enic = pmd_priv(eth_dev);

	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
		return;

	ENICPMD_FUNC_TRACE();
	enic->promisc = 0;
	enic_add_packet_filter(enic);
}

static void enicpmd_dev_allmulticast_enable(struct rte_eth_dev *eth_dev)
{
	struct enic *enic = pmd_priv(eth_dev);

	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
		return;

	ENICPMD_FUNC_TRACE();
	enic->allmulti = 1;
	enic_add_packet_filter(enic);
}

static void enicpmd_dev_allmulticast_disable(struct rte_eth_dev *eth_dev)
{
	struct enic *enic = pmd_priv(eth_dev);

	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
		return;

	ENICPMD_FUNC_TRACE();
	enic->allmulti = 0;
	enic_add_packet_filter(enic);
}

static int enicpmd_add_mac_addr(struct rte_eth_dev *eth_dev,
	struct ether_addr *mac_addr,
	__rte_unused uint32_t index, __rte_unused uint32_t pool)
{
	struct enic *enic = pmd_priv(eth_dev);

	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
		return -E_RTE_SECONDARY;

	ENICPMD_FUNC_TRACE();
	return enic_set_mac_address(enic, mac_addr->addr_bytes);
}

static void enicpmd_remove_mac_addr(struct rte_eth_dev *eth_dev, uint32_t index)
{
	struct enic *enic = pmd_priv(eth_dev);

	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
		return;

	ENICPMD_FUNC_TRACE();
	if (enic_del_mac_address(enic, index))
		dev_err(enic, "del mac addr failed\n");
}

static int enicpmd_set_mac_addr(struct rte_eth_dev *eth_dev,
				struct ether_addr *addr)
{
	struct enic *enic = pmd_priv(eth_dev);
	int ret;

	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
		return -E_RTE_SECONDARY;

	ENICPMD_FUNC_TRACE();
	ret = enic_del_mac_address(enic, 0);
	if (ret)
		return ret;
	return enic_set_mac_address(enic, addr->addr_bytes);
}

static int enicpmd_mtu_set(struct rte_eth_dev *eth_dev, uint16_t mtu)
{
	struct enic *enic = pmd_priv(eth_dev);

	ENICPMD_FUNC_TRACE();
	return enic_set_mtu(enic, mtu);
}

static int enicpmd_dev_rss_reta_query(struct rte_eth_dev *dev,
				      struct rte_eth_rss_reta_entry64
				      *reta_conf,
				      uint16_t reta_size)
{
	struct enic *enic = pmd_priv(dev);
	uint16_t i, idx, shift;

	ENICPMD_FUNC_TRACE();
	if (reta_size != ENIC_RSS_RETA_SIZE) {
		dev_err(enic, "reta_query: wrong reta_size. given=%u expected=%u\n",
			reta_size, ENIC_RSS_RETA_SIZE);
		return -EINVAL;
	}

	for (i = 0; i < reta_size; i++) {
		idx = i / RTE_RETA_GROUP_SIZE;
		shift = i % RTE_RETA_GROUP_SIZE;
		if (reta_conf[idx].mask & (1ULL << shift))
			reta_conf[idx].reta[shift] = enic_sop_rq_idx_to_rte_idx(
				enic->rss_cpu.cpu[i / 4].b[i % 4]);
	}

	return 0;
}

static int enicpmd_dev_rss_reta_update(struct rte_eth_dev *dev,
				       struct rte_eth_rss_reta_entry64
				       *reta_conf,
				       uint16_t reta_size)
{
	struct enic *enic = pmd_priv(dev);
	union vnic_rss_cpu rss_cpu;
	uint16_t i, idx, shift;

	ENICPMD_FUNC_TRACE();
	if (reta_size != ENIC_RSS_RETA_SIZE) {
		dev_err(enic, "reta_update: wrong reta_size. given=%u"
			" expected=%u\n",
			reta_size, ENIC_RSS_RETA_SIZE);
		return -EINVAL;
	}
	/*
	 * Start with the current reta and modify it per reta_conf, as we
	 * need to push the entire reta even if we only modify one entry.
	 */
	rss_cpu = enic->rss_cpu;
	for (i = 0; i < reta_size; i++) {
		idx = i / RTE_RETA_GROUP_SIZE;
		shift = i % RTE_RETA_GROUP_SIZE;
		if (reta_conf[idx].mask & (1ULL << shift))
			rss_cpu.cpu[i / 4].b[i % 4] =
				enic_rte_rq_idx_to_sop_idx(
					reta_conf[idx].reta[shift]);
	}
	return enic_set_rss_reta(enic, &rss_cpu);
}

static int enicpmd_dev_rss_hash_update(struct rte_eth_dev *dev,
				       struct rte_eth_rss_conf *rss_conf)
{
	struct enic *enic = pmd_priv(dev);

	ENICPMD_FUNC_TRACE();
	return enic_set_rss_conf(enic, rss_conf);
}

static int enicpmd_dev_rss_hash_conf_get(struct rte_eth_dev *dev,
					 struct rte_eth_rss_conf *rss_conf)
{
	struct enic *enic = pmd_priv(dev);

	ENICPMD_FUNC_TRACE();
	if (rss_conf == NULL)
		return -EINVAL;
	if (rss_conf->rss_key != NULL &&
	    rss_conf->rss_key_len < ENIC_RSS_HASH_KEY_SIZE) {
		dev_err(enic, "rss_hash_conf_get: wrong rss_key_len. given=%u"
			" expected=%u+\n",
			rss_conf->rss_key_len, ENIC_RSS_HASH_KEY_SIZE);
		return -EINVAL;
	}
	rss_conf->rss_hf = enic->rss_hf;
	if (rss_conf->rss_key != NULL) {
		int i;
		for (i = 0; i < ENIC_RSS_HASH_KEY_SIZE; i++) {
			rss_conf->rss_key[i] =
				enic->rss_key.key[i / 10].b[i % 10];
		}
		rss_conf->rss_key_len = ENIC_RSS_HASH_KEY_SIZE;
	}
	return 0;
}

static void enicpmd_dev_rxq_info_get(struct rte_eth_dev *dev,
				     uint16_t rx_queue_id,
				     struct rte_eth_rxq_info *qinfo)
{
	struct enic *enic = pmd_priv(dev);
	struct vnic_rq *rq_sop;
	struct vnic_rq *rq_data;
	struct rte_eth_rxconf *conf;
	uint16_t sop_queue_idx;
	uint16_t data_queue_idx;

	ENICPMD_FUNC_TRACE();
	sop_queue_idx = enic_rte_rq_idx_to_sop_idx(rx_queue_id);
	data_queue_idx = enic_rte_rq_idx_to_data_idx(rx_queue_id);
	rq_sop = &enic->rq[sop_queue_idx];
	rq_data = &enic->rq[data_queue_idx]; /* valid if data_queue_enable */
	qinfo->mp = rq_sop->mp;
	qinfo->scattered_rx = rq_sop->data_queue_enable;
	qinfo->nb_desc = rq_sop->ring.desc_count;
	if (qinfo->scattered_rx)
		qinfo->nb_desc += rq_data->ring.desc_count;
	conf = &qinfo->conf;
	memset(conf, 0, sizeof(*conf));
	conf->rx_free_thresh = rq_sop->rx_free_thresh;
	conf->rx_drop_en = 1;
	/*
	 * Except VLAN stripping (port setting), all the checksum offloads
	 * are always enabled.
	 */
	conf->offloads = enic->rx_offload_capa;
	if (!enic->ig_vlan_strip_en)
		conf->offloads &= ~DEV_RX_OFFLOAD_VLAN_STRIP;
	/* rx_thresh and other fields are not applicable for enic */
}

static void enicpmd_dev_txq_info_get(struct rte_eth_dev *dev,
				     __rte_unused uint16_t tx_queue_id,
				     struct rte_eth_txq_info *qinfo)
{
	struct enic *enic = pmd_priv(dev);

	ENICPMD_FUNC_TRACE();
	qinfo->nb_desc = enic->config.wq_desc_count;
	memset(&qinfo->conf, 0, sizeof(qinfo->conf));
	qinfo->conf.offloads = enic->tx_offload_capa;
	/* tx_thresh, and all the other fields are not applicable for enic */
}

static int enicpmd_dev_rx_queue_intr_enable(struct rte_eth_dev *eth_dev,
					    uint16_t rx_queue_id)
{
	struct enic *enic = pmd_priv(eth_dev);

	ENICPMD_FUNC_TRACE();
	vnic_intr_unmask(&enic->intr[rx_queue_id + ENICPMD_RXQ_INTR_OFFSET]);
	return 0;
}

static int enicpmd_dev_rx_queue_intr_disable(struct rte_eth_dev *eth_dev,
					     uint16_t rx_queue_id)
{
	struct enic *enic = pmd_priv(eth_dev);

	ENICPMD_FUNC_TRACE();
	vnic_intr_mask(&enic->intr[rx_queue_id + ENICPMD_RXQ_INTR_OFFSET]);
	return 0;
}

static const struct eth_dev_ops enicpmd_eth_dev_ops = {
	.dev_configure        = enicpmd_dev_configure,
	.dev_start            = enicpmd_dev_start,
	.dev_stop             = enicpmd_dev_stop,
	.dev_set_link_up      = NULL,
	.dev_set_link_down    = NULL,
	.dev_close            = enicpmd_dev_close,
	.promiscuous_enable   = enicpmd_dev_promiscuous_enable,
	.promiscuous_disable  = enicpmd_dev_promiscuous_disable,
	.allmulticast_enable  = enicpmd_dev_allmulticast_enable,
	.allmulticast_disable = enicpmd_dev_allmulticast_disable,
	.link_update          = enicpmd_dev_link_update,
	.stats_get            = enicpmd_dev_stats_get,
	.stats_reset          = enicpmd_dev_stats_reset,
	.queue_stats_mapping_set = NULL,
	.dev_infos_get        = enicpmd_dev_info_get,
	.dev_supported_ptypes_get = enicpmd_dev_supported_ptypes_get,
	.mtu_set              = enicpmd_mtu_set,
	.vlan_filter_set      = NULL,
	.vlan_tpid_set        = NULL,
	.vlan_offload_set     = enicpmd_vlan_offload_set,
	.vlan_strip_queue_set = NULL,
	.rx_queue_start       = enicpmd_dev_rx_queue_start,
	.rx_queue_stop        = enicpmd_dev_rx_queue_stop,
	.tx_queue_start       = enicpmd_dev_tx_queue_start,
	.tx_queue_stop        = enicpmd_dev_tx_queue_stop,
	.rx_queue_setup       = enicpmd_dev_rx_queue_setup,
	.rx_queue_release     = enicpmd_dev_rx_queue_release,
	.rx_queue_count       = enicpmd_dev_rx_queue_count,
	.rx_descriptor_done   = NULL,
	.tx_queue_setup       = enicpmd_dev_tx_queue_setup,
	.tx_queue_release     = enicpmd_dev_tx_queue_release,
	.rx_queue_intr_enable = enicpmd_dev_rx_queue_intr_enable,
	.rx_queue_intr_disable = enicpmd_dev_rx_queue_intr_disable,
	.rxq_info_get         = enicpmd_dev_rxq_info_get,
	.txq_info_get         = enicpmd_dev_txq_info_get,
	.dev_led_on           = NULL,
	.dev_led_off          = NULL,
	.flow_ctrl_get        = NULL,
	.flow_ctrl_set        = NULL,
	.priority_flow_ctrl_set = NULL,
	.mac_addr_add         = enicpmd_add_mac_addr,
	.mac_addr_remove      = enicpmd_remove_mac_addr,
	.mac_addr_set         = enicpmd_set_mac_addr,
	.filter_ctrl          = enicpmd_dev_filter_ctrl,
	.reta_query           = enicpmd_dev_rss_reta_query,
	.reta_update          = enicpmd_dev_rss_reta_update,
	.rss_hash_conf_get    = enicpmd_dev_rss_hash_conf_get,
	.rss_hash_update      = enicpmd_dev_rss_hash_update,
};

static int enic_parse_disable_overlay(__rte_unused const char *key,
				      const char *value,
				      void *opaque)
{
	struct enic *enic;

	enic = (struct enic *)opaque;
	if (strcmp(value, "0") == 0) {
		enic->disable_overlay = false;
	} else if (strcmp(value, "1") == 0) {
		enic->disable_overlay = true;
	} else {
		dev_err(enic, "Invalid value for " ENIC_DEVARG_DISABLE_OVERLAY
			": expected=0|1 given=%s\n", value);
		return -EINVAL;
	}
	return 0;
}

static int enic_check_devargs(struct rte_eth_dev *dev)
{
	static const char *const valid_keys[] = {
		ENIC_DEVARG_DISABLE_OVERLAY, NULL};
	struct enic *enic = pmd_priv(dev);
	struct rte_kvargs *kvlist;

	ENICPMD_FUNC_TRACE();

	enic->disable_overlay = false;
	if (!dev->device->devargs)
		return 0;
	kvlist = rte_kvargs_parse(dev->device->devargs->args, valid_keys);
	if (!kvlist)
		return -EINVAL;
	if (rte_kvargs_process(kvlist, ENIC_DEVARG_DISABLE_OVERLAY,
			       enic_parse_disable_overlay, enic) < 0) {
		rte_kvargs_free(kvlist);
		return -EINVAL;
	}
	rte_kvargs_free(kvlist);
	return 0;
}

struct enic *enicpmd_list_head = NULL;
/* Initialize the driver
 * It returns 0 on success.
 */
static int eth_enicpmd_dev_init(struct rte_eth_dev *eth_dev)
{
	struct rte_pci_device *pdev;
	struct rte_pci_addr *addr;
	struct enic *enic = pmd_priv(eth_dev);
	int err;

	ENICPMD_FUNC_TRACE();

	enic->port_id = eth_dev->data->port_id;
	enic->rte_dev = eth_dev;
	eth_dev->dev_ops = &enicpmd_eth_dev_ops;
	eth_dev->rx_pkt_burst = &enic_recv_pkts;
	eth_dev->tx_pkt_burst = &enic_xmit_pkts;
	eth_dev->tx_pkt_prepare = &enic_prep_pkts;

	pdev = RTE_ETH_DEV_TO_PCI(eth_dev);
	rte_eth_copy_pci_info(eth_dev, pdev);
	enic->pdev = pdev;
	addr = &pdev->addr;

	snprintf(enic->bdf_name, ENICPMD_BDF_LENGTH, "%04x:%02x:%02x.%x",
		addr->domain, addr->bus, addr->devid, addr->function);

	err = enic_check_devargs(eth_dev);
	if (err)
		return err;
	return enic_probe(enic);
}

static int eth_enic_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
	struct rte_pci_device *pci_dev)
{
	return rte_eth_dev_pci_generic_probe(pci_dev, sizeof(struct enic),
		eth_enicpmd_dev_init);
}

static int eth_enic_pci_remove(struct rte_pci_device *pci_dev)
{
	return rte_eth_dev_pci_generic_remove(pci_dev, NULL);
}

static struct rte_pci_driver rte_enic_pmd = {
	.id_table = pci_id_enic_map,
	.drv_flags = RTE_PCI_DRV_NEED_MAPPING | RTE_PCI_DRV_INTR_LSC,
	.probe = eth_enic_pci_probe,
	.remove = eth_enic_pci_remove,
};

RTE_PMD_REGISTER_PCI(net_enic, rte_enic_pmd);
RTE_PMD_REGISTER_PCI_TABLE(net_enic, pci_id_enic_map);
RTE_PMD_REGISTER_KMOD_DEP(net_enic, "* igb_uio | uio_pci_generic | vfio-pci");
RTE_PMD_REGISTER_PARAM_STRING(net_enic,
			      ENIC_DEVARG_DISABLE_OVERLAY "=<0|1> ");
