/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2020 Intel Corporation
 */

#include <errno.h>
#include <stdbool.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <unistd.h>

#include <rte_interrupts.h>
#include <rte_debug.h>
#include <rte_pci.h>
#include <rte_atomic.h>
#include <rte_eal.h>
#include <rte_ether.h>
#include <rte_ethdev_pci.h>
#include <rte_kvargs.h>
#include <rte_malloc.h>
#include <rte_memzone.h>
#include <rte_dev.h>

#include <iavf_devids.h>

#include "ice_generic_flow.h"
#include "ice_dcf_ethdev.h"
#include "ice_rxtx.h"

static uint16_t
ice_dcf_recv_pkts(__rte_unused void *rx_queue,
		  __rte_unused struct rte_mbuf **bufs,
		  __rte_unused uint16_t nb_pkts)
{
	return 0;
}

static uint16_t
ice_dcf_xmit_pkts(__rte_unused void *tx_queue,
		  __rte_unused struct rte_mbuf **bufs,
		  __rte_unused uint16_t nb_pkts)
{
	return 0;
}

static int
ice_dcf_init_rxq(struct rte_eth_dev *dev, struct ice_rx_queue *rxq)
{
	struct ice_dcf_adapter *dcf_ad = dev->data->dev_private;
	struct rte_eth_dev_data *dev_data = dev->data;
	struct iavf_hw *hw = &dcf_ad->real_hw.avf;
	uint16_t buf_size, max_pkt_len;

	buf_size = rte_pktmbuf_data_room_size(rxq->mp) - RTE_PKTMBUF_HEADROOM;
	rxq->rx_hdr_len = 0;
	rxq->rx_buf_len = RTE_ALIGN_FLOOR(buf_size, (1 << ICE_RLAN_CTX_DBUF_S));
	rxq->rx_buf_len = RTE_MIN(rxq->rx_buf_len, ICE_RX_MAX_DATA_BUF_SIZE);
	max_pkt_len = RTE_MIN((uint32_t)
			      ICE_SUPPORT_CHAIN_NUM * rxq->rx_buf_len,
			      dev->data->dev_conf.rxmode.max_rx_pkt_len);

	/* Check if the jumbo frame and maximum packet length are set
	 * correctly.
	 */
	if (dev->data->dev_conf.rxmode.offloads & DEV_RX_OFFLOAD_JUMBO_FRAME) {
		if (max_pkt_len <= ICE_ETH_MAX_LEN ||
		    max_pkt_len > ICE_FRAME_SIZE_MAX) {
			PMD_DRV_LOG(ERR, "maximum packet length must be "
				    "larger than %u and smaller than %u, "
				    "as jumbo frame is enabled",
				    (uint32_t)ICE_ETH_MAX_LEN,
				    (uint32_t)ICE_FRAME_SIZE_MAX);
			return -EINVAL;
		}
	} else {
		if (max_pkt_len < RTE_ETHER_MIN_LEN ||
		    max_pkt_len > ICE_ETH_MAX_LEN) {
			PMD_DRV_LOG(ERR, "maximum packet length must be "
				    "larger than %u and smaller than %u, "
				    "as jumbo frame is disabled",
				    (uint32_t)RTE_ETHER_MIN_LEN,
				    (uint32_t)ICE_ETH_MAX_LEN);
			return -EINVAL;
		}
	}

	rxq->max_pkt_len = max_pkt_len;
	if ((dev_data->dev_conf.rxmode.offloads & DEV_RX_OFFLOAD_SCATTER) ||
	    (rxq->max_pkt_len + 2 * ICE_VLAN_TAG_SIZE) > buf_size) {
		dev_data->scattered_rx = 1;
	}
	rxq->qrx_tail = hw->hw_addr + IAVF_QRX_TAIL1(rxq->queue_id);
	IAVF_PCI_REG_WRITE(rxq->qrx_tail, rxq->nb_rx_desc - 1);
	IAVF_WRITE_FLUSH(hw);

	return 0;
}

static int
ice_dcf_init_rx_queues(struct rte_eth_dev *dev)
{
	struct ice_rx_queue **rxq =
		(struct ice_rx_queue **)dev->data->rx_queues;
	int i, ret;

	for (i = 0; i < dev->data->nb_rx_queues; i++) {
		if (!rxq[i] || !rxq[i]->q_set)
			continue;
		ret = ice_dcf_init_rxq(dev, rxq[i]);
		if (ret)
			return ret;
	}

	ice_set_rx_function(dev);
	ice_set_tx_function(dev);

	return 0;
}

#define IAVF_MISC_VEC_ID                RTE_INTR_VEC_ZERO_OFFSET
#define IAVF_RX_VEC_START               RTE_INTR_VEC_RXTX_OFFSET

#define IAVF_ITR_INDEX_DEFAULT          0
#define IAVF_QUEUE_ITR_INTERVAL_DEFAULT 32 /* 32 us */
#define IAVF_QUEUE_ITR_INTERVAL_MAX     8160 /* 8160 us */

static inline uint16_t
iavf_calc_itr_interval(int16_t interval)
{
	if (interval < 0 || interval > IAVF_QUEUE_ITR_INTERVAL_MAX)
		interval = IAVF_QUEUE_ITR_INTERVAL_DEFAULT;

	/* Convert to hardware count, as writing each 1 represents 2 us */
	return interval / 2;
}

static int
ice_dcf_config_rx_queues_irqs(struct rte_eth_dev *dev,
				     struct rte_intr_handle *intr_handle)
{
	struct ice_dcf_adapter *adapter = dev->data->dev_private;
	struct ice_dcf_hw *hw = &adapter->real_hw;
	uint16_t interval, i;
	int vec;

	if (rte_intr_cap_multiple(intr_handle) &&
	    dev->data->dev_conf.intr_conf.rxq) {
		if (rte_intr_efd_enable(intr_handle, dev->data->nb_rx_queues))
			return -1;
	}

	if (rte_intr_dp_is_en(intr_handle) && !intr_handle->intr_vec) {
		intr_handle->intr_vec =
			rte_zmalloc("intr_vec",
				    dev->data->nb_rx_queues * sizeof(int), 0);
		if (!intr_handle->intr_vec) {
			PMD_DRV_LOG(ERR, "Failed to allocate %d rx intr_vec",
				    dev->data->nb_rx_queues);
			return -1;
		}
	}

	if (!dev->data->dev_conf.intr_conf.rxq ||
	    !rte_intr_dp_is_en(intr_handle)) {
		/* Rx interrupt disabled, Map interrupt only for writeback */
		hw->nb_msix = 1;
		if (hw->vf_res->vf_cap_flags &
		    VIRTCHNL_VF_OFFLOAD_WB_ON_ITR) {
			/* If WB_ON_ITR supports, enable it */
			hw->msix_base = IAVF_RX_VEC_START;
			/* Set the ITR for index zero, to 2us to make sure that
			 * we leave time for aggregation to occur, but don't
			 * increase latency dramatically.
			 */
			IAVF_WRITE_REG(&hw->avf,
				       IAVF_VFINT_DYN_CTLN1(hw->msix_base - 1),
				       (0 << IAVF_VFINT_DYN_CTLN1_ITR_INDX_SHIFT) |
				       IAVF_VFINT_DYN_CTLN1_WB_ON_ITR_MASK |
				       (2UL << IAVF_VFINT_DYN_CTLN1_INTERVAL_SHIFT));
		} else {
			/* If no WB_ON_ITR offload flags, need to set
			 * interrupt for descriptor write back.
			 */
			hw->msix_base = IAVF_MISC_VEC_ID;

			/* set ITR to max */
			interval =
			iavf_calc_itr_interval(IAVF_QUEUE_ITR_INTERVAL_MAX);
			IAVF_WRITE_REG(&hw->avf, IAVF_VFINT_DYN_CTL01,
				       IAVF_VFINT_DYN_CTL01_INTENA_MASK |
				       (IAVF_ITR_INDEX_DEFAULT <<
					IAVF_VFINT_DYN_CTL01_ITR_INDX_SHIFT) |
				       (interval <<
					IAVF_VFINT_DYN_CTL01_INTERVAL_SHIFT));
		}
		IAVF_WRITE_FLUSH(&hw->avf);
		/* map all queues to the same interrupt */
		for (i = 0; i < dev->data->nb_rx_queues; i++)
			hw->rxq_map[hw->msix_base] |= 1 << i;
	} else {
		if (!rte_intr_allow_others(intr_handle)) {
			hw->nb_msix = 1;
			hw->msix_base = IAVF_MISC_VEC_ID;
			for (i = 0; i < dev->data->nb_rx_queues; i++) {
				hw->rxq_map[hw->msix_base] |= 1 << i;
				intr_handle->intr_vec[i] = IAVF_MISC_VEC_ID;
			}
			PMD_DRV_LOG(DEBUG,
				    "vector %u are mapping to all Rx queues",
				    hw->msix_base);
		} else {
			/* If Rx interrupt is required, and we can use
			 * multi interrupts, then the vec is from 1
			 */
			hw->nb_msix = RTE_MIN(hw->vf_res->max_vectors,
					      intr_handle->nb_efd);
			hw->msix_base = IAVF_MISC_VEC_ID;
			vec = IAVF_MISC_VEC_ID;
			for (i = 0; i < dev->data->nb_rx_queues; i++) {
				hw->rxq_map[vec] |= 1 << i;
				intr_handle->intr_vec[i] = vec++;
				if (vec >= hw->nb_msix)
					vec = IAVF_RX_VEC_START;
			}
			PMD_DRV_LOG(DEBUG,
				    "%u vectors are mapping to %u Rx queues",
				    hw->nb_msix, dev->data->nb_rx_queues);
		}
	}

	if (ice_dcf_config_irq_map(hw)) {
		PMD_DRV_LOG(ERR, "config interrupt mapping failed");
		return -1;
	}
	return 0;
}

static int
alloc_rxq_mbufs(struct ice_rx_queue *rxq)
{
	volatile union ice_rx_flex_desc *rxd;
	struct rte_mbuf *mbuf = NULL;
	uint64_t dma_addr;
	uint16_t i;

	for (i = 0; i < rxq->nb_rx_desc; i++) {
		mbuf = rte_mbuf_raw_alloc(rxq->mp);
		if (unlikely(!mbuf)) {
			PMD_DRV_LOG(ERR, "Failed to allocate mbuf for RX");
			return -ENOMEM;
		}

		rte_mbuf_refcnt_set(mbuf, 1);
		mbuf->next = NULL;
		mbuf->data_off = RTE_PKTMBUF_HEADROOM;
		mbuf->nb_segs = 1;
		mbuf->port = rxq->port_id;

		dma_addr =
			rte_cpu_to_le_64(rte_mbuf_data_iova_default(mbuf));

		rxd = &rxq->rx_ring[i];
		rxd->read.pkt_addr = dma_addr;
		rxd->read.hdr_addr = 0;
#ifndef RTE_LIBRTE_ICE_16BYTE_RX_DESC
		rxd->read.rsvd1 = 0;
		rxd->read.rsvd2 = 0;
#endif

		rxq->sw_ring[i].mbuf = (void *)mbuf;
	}

	return 0;
}

static int
ice_dcf_rx_queue_start(struct rte_eth_dev *dev, uint16_t rx_queue_id)
{
	struct ice_dcf_adapter *ad = dev->data->dev_private;
	struct iavf_hw *hw = &ad->real_hw.avf;
	struct ice_rx_queue *rxq;
	int err = 0;

	if (rx_queue_id >= dev->data->nb_rx_queues)
		return -EINVAL;

	rxq = dev->data->rx_queues[rx_queue_id];

	err = alloc_rxq_mbufs(rxq);
	if (err) {
		PMD_DRV_LOG(ERR, "Failed to allocate RX queue mbuf");
		return err;
	}

	rte_wmb();

	/* Init the RX tail register. */
	IAVF_PCI_REG_WRITE(rxq->qrx_tail, rxq->nb_rx_desc - 1);
	IAVF_WRITE_FLUSH(hw);

	/* Ready to switch the queue on */
	err = ice_dcf_switch_queue(&ad->real_hw, rx_queue_id, true, true);
	if (err) {
		PMD_DRV_LOG(ERR, "Failed to switch RX queue %u on",
			    rx_queue_id);
		return err;
	}

	dev->data->rx_queue_state[rx_queue_id] = RTE_ETH_QUEUE_STATE_STARTED;

	return 0;
}

static inline void
reset_rx_queue(struct ice_rx_queue *rxq)
{
	uint16_t len;
	uint32_t i;

	if (!rxq)
		return;

	len = rxq->nb_rx_desc + ICE_RX_MAX_BURST;

	for (i = 0; i < len * sizeof(union ice_rx_flex_desc); i++)
		((volatile char *)rxq->rx_ring)[i] = 0;

	memset(&rxq->fake_mbuf, 0x0, sizeof(rxq->fake_mbuf));

	for (i = 0; i < ICE_RX_MAX_BURST; i++)
		rxq->sw_ring[rxq->nb_rx_desc + i].mbuf = &rxq->fake_mbuf;

	/* for rx bulk */
	rxq->rx_nb_avail = 0;
	rxq->rx_next_avail = 0;
	rxq->rx_free_trigger = (uint16_t)(rxq->rx_free_thresh - 1);

	rxq->rx_tail = 0;
	rxq->nb_rx_hold = 0;
	rxq->pkt_first_seg = NULL;
	rxq->pkt_last_seg = NULL;
}

static inline void
reset_tx_queue(struct ice_tx_queue *txq)
{
	struct ice_tx_entry *txe;
	uint32_t i, size;
	uint16_t prev;

	if (!txq) {
		PMD_DRV_LOG(DEBUG, "Pointer to txq is NULL");
		return;
	}

	txe = txq->sw_ring;
	size = sizeof(struct ice_tx_desc) * txq->nb_tx_desc;
	for (i = 0; i < size; i++)
		((volatile char *)txq->tx_ring)[i] = 0;

	prev = (uint16_t)(txq->nb_tx_desc - 1);
	for (i = 0; i < txq->nb_tx_desc; i++) {
		txq->tx_ring[i].cmd_type_offset_bsz =
			rte_cpu_to_le_64(IAVF_TX_DESC_DTYPE_DESC_DONE);
		txe[i].mbuf =  NULL;
		txe[i].last_id = i;
		txe[prev].next_id = i;
		prev = i;
	}

	txq->tx_tail = 0;
	txq->nb_tx_used = 0;

	txq->last_desc_cleaned = txq->nb_tx_desc - 1;
	txq->nb_tx_free = txq->nb_tx_desc - 1;

	txq->tx_next_dd = txq->tx_rs_thresh - 1;
	txq->tx_next_rs = txq->tx_rs_thresh - 1;
}

static int
ice_dcf_rx_queue_stop(struct rte_eth_dev *dev, uint16_t rx_queue_id)
{
	struct ice_dcf_adapter *ad = dev->data->dev_private;
	struct ice_dcf_hw *hw = &ad->real_hw;
	struct ice_rx_queue *rxq;
	int err;

	if (rx_queue_id >= dev->data->nb_rx_queues)
		return -EINVAL;

	err = ice_dcf_switch_queue(hw, rx_queue_id, true, false);
	if (err) {
		PMD_DRV_LOG(ERR, "Failed to switch RX queue %u off",
			    rx_queue_id);
		return err;
	}

	rxq = dev->data->rx_queues[rx_queue_id];
	rxq->rx_rel_mbufs(rxq);
	reset_rx_queue(rxq);
	dev->data->rx_queue_state[rx_queue_id] = RTE_ETH_QUEUE_STATE_STOPPED;

	return 0;
}

static int
ice_dcf_tx_queue_start(struct rte_eth_dev *dev, uint16_t tx_queue_id)
{
	struct ice_dcf_adapter *ad = dev->data->dev_private;
	struct iavf_hw *hw = &ad->real_hw.avf;
	struct ice_tx_queue *txq;
	int err = 0;

	if (tx_queue_id >= dev->data->nb_tx_queues)
		return -EINVAL;

	txq = dev->data->tx_queues[tx_queue_id];

	/* Init the RX tail register. */
	txq->qtx_tail = hw->hw_addr + IAVF_QTX_TAIL1(tx_queue_id);
	IAVF_PCI_REG_WRITE(txq->qtx_tail, 0);
	IAVF_WRITE_FLUSH(hw);

	/* Ready to switch the queue on */
	err = ice_dcf_switch_queue(&ad->real_hw, tx_queue_id, false, true);

	if (err) {
		PMD_DRV_LOG(ERR, "Failed to switch TX queue %u on",
			    tx_queue_id);
		return err;
	}

	dev->data->tx_queue_state[tx_queue_id] = RTE_ETH_QUEUE_STATE_STARTED;

	return 0;
}

static int
ice_dcf_tx_queue_stop(struct rte_eth_dev *dev, uint16_t tx_queue_id)
{
	struct ice_dcf_adapter *ad = dev->data->dev_private;
	struct ice_dcf_hw *hw = &ad->real_hw;
	struct ice_tx_queue *txq;
	int err;

	if (tx_queue_id >= dev->data->nb_tx_queues)
		return -EINVAL;

	err = ice_dcf_switch_queue(hw, tx_queue_id, false, false);
	if (err) {
		PMD_DRV_LOG(ERR, "Failed to switch TX queue %u off",
			    tx_queue_id);
		return err;
	}

	txq = dev->data->tx_queues[tx_queue_id];
	txq->tx_rel_mbufs(txq);
	reset_tx_queue(txq);
	dev->data->tx_queue_state[tx_queue_id] = RTE_ETH_QUEUE_STATE_STOPPED;

	return 0;
}

static int
ice_dcf_start_queues(struct rte_eth_dev *dev)
{
	struct ice_rx_queue *rxq;
	struct ice_tx_queue *txq;
	int nb_rxq = 0;
	int nb_txq, i;

	for (nb_txq = 0; nb_txq < dev->data->nb_tx_queues; nb_txq++) {
		txq = dev->data->tx_queues[nb_txq];
		if (txq->tx_deferred_start)
			continue;
		if (ice_dcf_tx_queue_start(dev, nb_txq) != 0) {
			PMD_DRV_LOG(ERR, "Fail to start queue %u", nb_txq);
			goto tx_err;
		}
	}

	for (nb_rxq = 0; nb_rxq < dev->data->nb_rx_queues; nb_rxq++) {
		rxq = dev->data->rx_queues[nb_rxq];
		if (rxq->rx_deferred_start)
			continue;
		if (ice_dcf_rx_queue_start(dev, nb_rxq) != 0) {
			PMD_DRV_LOG(ERR, "Fail to start queue %u", nb_rxq);
			goto rx_err;
		}
	}

	return 0;

	/* stop the started queues if failed to start all queues */
rx_err:
	for (i = 0; i < nb_rxq; i++)
		ice_dcf_rx_queue_stop(dev, i);
tx_err:
	for (i = 0; i < nb_txq; i++)
		ice_dcf_tx_queue_stop(dev, i);

	return -1;
}

static int
ice_dcf_dev_start(struct rte_eth_dev *dev)
{
	struct ice_dcf_adapter *dcf_ad = dev->data->dev_private;
	struct rte_intr_handle *intr_handle = dev->intr_handle;
	struct ice_adapter *ad = &dcf_ad->parent;
	struct ice_dcf_hw *hw = &dcf_ad->real_hw;
	int ret;

	ad->pf.adapter_stopped = 0;

	hw->num_queue_pairs = RTE_MAX(dev->data->nb_rx_queues,
				      dev->data->nb_tx_queues);

	ret = ice_dcf_init_rx_queues(dev);
	if (ret) {
		PMD_DRV_LOG(ERR, "Fail to init queues");
		return ret;
	}

	if (hw->vf_res->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_RSS_PF) {
		ret = ice_dcf_init_rss(hw);
		if (ret) {
			PMD_DRV_LOG(ERR, "Failed to configure RSS");
			return ret;
		}
	}

	ret = ice_dcf_configure_queues(hw);
	if (ret) {
		PMD_DRV_LOG(ERR, "Fail to config queues");
		return ret;
	}

	ret = ice_dcf_config_rx_queues_irqs(dev, intr_handle);
	if (ret) {
		PMD_DRV_LOG(ERR, "Fail to config rx queues' irqs");
		return ret;
	}

	if (dev->data->dev_conf.intr_conf.rxq != 0) {
		rte_intr_disable(intr_handle);
		rte_intr_enable(intr_handle);
	}

	ret = ice_dcf_start_queues(dev);
	if (ret) {
		PMD_DRV_LOG(ERR, "Failed to enable queues");
		return ret;
	}

	ret = ice_dcf_add_del_all_mac_addr(hw, true);
	if (ret) {
		PMD_DRV_LOG(ERR, "Failed to add mac addr");
		return ret;
	}

	dev->data->dev_link.link_status = ETH_LINK_UP;

	return 0;
}

static void
ice_dcf_stop_queues(struct rte_eth_dev *dev)
{
	struct ice_dcf_adapter *ad = dev->data->dev_private;
	struct ice_dcf_hw *hw = &ad->real_hw;
	struct ice_rx_queue *rxq;
	struct ice_tx_queue *txq;
	int ret, i;

	/* Stop All queues */
	ret = ice_dcf_disable_queues(hw);
	if (ret)
		PMD_DRV_LOG(WARNING, "Fail to stop queues");

	for (i = 0; i < dev->data->nb_tx_queues; i++) {
		txq = dev->data->tx_queues[i];
		if (!txq)
			continue;
		txq->tx_rel_mbufs(txq);
		reset_tx_queue(txq);
		dev->data->tx_queue_state[i] = RTE_ETH_QUEUE_STATE_STOPPED;
	}
	for (i = 0; i < dev->data->nb_rx_queues; i++) {
		rxq = dev->data->rx_queues[i];
		if (!rxq)
			continue;
		rxq->rx_rel_mbufs(rxq);
		reset_rx_queue(rxq);
		dev->data->rx_queue_state[i] = RTE_ETH_QUEUE_STATE_STOPPED;
	}
}

static int
ice_dcf_dev_stop(struct rte_eth_dev *dev)
{
	struct ice_dcf_adapter *dcf_ad = dev->data->dev_private;
	struct rte_intr_handle *intr_handle = dev->intr_handle;
	struct ice_adapter *ad = &dcf_ad->parent;

	if (ad->pf.adapter_stopped == 1) {
		PMD_DRV_LOG(DEBUG, "Port is already stopped");
		return 0;
	}

	ice_dcf_stop_queues(dev);

	rte_intr_efd_disable(intr_handle);
	if (intr_handle->intr_vec) {
		rte_free(intr_handle->intr_vec);
		intr_handle->intr_vec = NULL;
	}

	ice_dcf_add_del_all_mac_addr(&dcf_ad->real_hw, false);
	dev->data->dev_link.link_status = ETH_LINK_DOWN;
	ad->pf.adapter_stopped = 1;

	return 0;
}

static int
ice_dcf_dev_configure(struct rte_eth_dev *dev)
{
	struct ice_dcf_adapter *dcf_ad = dev->data->dev_private;
	struct ice_adapter *ad = &dcf_ad->parent;

	ad->rx_bulk_alloc_allowed = true;
	ad->tx_simple_allowed = true;

	if (dev->data->dev_conf.rxmode.mq_mode & ETH_MQ_RX_RSS_FLAG)
		dev->data->dev_conf.rxmode.offloads |= DEV_RX_OFFLOAD_RSS_HASH;

	return 0;
}

static int
ice_dcf_dev_info_get(struct rte_eth_dev *dev,
		     struct rte_eth_dev_info *dev_info)
{
	struct ice_dcf_adapter *adapter = dev->data->dev_private;
	struct ice_dcf_hw *hw = &adapter->real_hw;

	dev_info->max_mac_addrs = 1;
	dev_info->max_rx_queues = hw->vsi_res->num_queue_pairs;
	dev_info->max_tx_queues = hw->vsi_res->num_queue_pairs;
	dev_info->min_rx_bufsize = ICE_BUF_SIZE_MIN;
	dev_info->max_rx_pktlen = ICE_FRAME_SIZE_MAX;
	dev_info->hash_key_size = hw->vf_res->rss_key_size;
	dev_info->reta_size = hw->vf_res->rss_lut_size;
	dev_info->flow_type_rss_offloads = ICE_RSS_OFFLOAD_ALL;
	dev_info->max_mtu = dev_info->max_rx_pktlen - ICE_ETH_OVERHEAD;
	dev_info->min_mtu = RTE_ETHER_MIN_MTU;

	dev_info->rx_offload_capa =
		DEV_RX_OFFLOAD_VLAN_STRIP |
		DEV_RX_OFFLOAD_IPV4_CKSUM |
		DEV_RX_OFFLOAD_UDP_CKSUM |
		DEV_RX_OFFLOAD_TCP_CKSUM |
		DEV_RX_OFFLOAD_OUTER_IPV4_CKSUM |
		DEV_RX_OFFLOAD_SCATTER |
		DEV_RX_OFFLOAD_JUMBO_FRAME |
		DEV_RX_OFFLOAD_VLAN_FILTER |
		DEV_RX_OFFLOAD_RSS_HASH;
	dev_info->tx_offload_capa =
		DEV_TX_OFFLOAD_VLAN_INSERT |
		DEV_TX_OFFLOAD_IPV4_CKSUM |
		DEV_TX_OFFLOAD_UDP_CKSUM |
		DEV_TX_OFFLOAD_TCP_CKSUM |
		DEV_TX_OFFLOAD_SCTP_CKSUM |
		DEV_TX_OFFLOAD_OUTER_IPV4_CKSUM |
		DEV_TX_OFFLOAD_OUTER_UDP_CKSUM |
		DEV_TX_OFFLOAD_TCP_TSO |
		DEV_TX_OFFLOAD_VXLAN_TNL_TSO |
		DEV_TX_OFFLOAD_GRE_TNL_TSO |
		DEV_TX_OFFLOAD_IPIP_TNL_TSO |
		DEV_TX_OFFLOAD_GENEVE_TNL_TSO |
		DEV_TX_OFFLOAD_MULTI_SEGS;

	dev_info->default_rxconf = (struct rte_eth_rxconf) {
		.rx_thresh = {
			.pthresh = ICE_DEFAULT_RX_PTHRESH,
			.hthresh = ICE_DEFAULT_RX_HTHRESH,
			.wthresh = ICE_DEFAULT_RX_WTHRESH,
		},
		.rx_free_thresh = ICE_DEFAULT_RX_FREE_THRESH,
		.rx_drop_en = 0,
		.offloads = 0,
	};

	dev_info->default_txconf = (struct rte_eth_txconf) {
		.tx_thresh = {
			.pthresh = ICE_DEFAULT_TX_PTHRESH,
			.hthresh = ICE_DEFAULT_TX_HTHRESH,
			.wthresh = ICE_DEFAULT_TX_WTHRESH,
		},
		.tx_free_thresh = ICE_DEFAULT_TX_FREE_THRESH,
		.tx_rs_thresh = ICE_DEFAULT_TX_RSBIT_THRESH,
		.offloads = 0,
	};

	dev_info->rx_desc_lim = (struct rte_eth_desc_lim) {
		.nb_max = ICE_MAX_RING_DESC,
		.nb_min = ICE_MIN_RING_DESC,
		.nb_align = ICE_ALIGN_RING_DESC,
	};

	dev_info->tx_desc_lim = (struct rte_eth_desc_lim) {
		.nb_max = ICE_MAX_RING_DESC,
		.nb_min = ICE_MIN_RING_DESC,
		.nb_align = ICE_ALIGN_RING_DESC,
	};

	return 0;
}

static int
ice_dcf_dev_promiscuous_enable(__rte_unused struct rte_eth_dev *dev)
{
	return 0;
}

static int
ice_dcf_dev_promiscuous_disable(__rte_unused struct rte_eth_dev *dev)
{
	return 0;
}

static int
ice_dcf_dev_allmulticast_enable(__rte_unused struct rte_eth_dev *dev)
{
	return 0;
}

static int
ice_dcf_dev_allmulticast_disable(__rte_unused struct rte_eth_dev *dev)
{
	return 0;
}

static int
ice_dcf_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;

	if (!dev)
		return -EINVAL;

	switch (filter_type) {
	case RTE_ETH_FILTER_GENERIC:
		if (filter_op != RTE_ETH_FILTER_GET)
			return -EINVAL;
		*(const void **)arg = &ice_flow_ops;
		break;

	default:
		PMD_DRV_LOG(WARNING, "Filter type (%d) not supported",
			    filter_type);
		ret = -EINVAL;
		break;
	}

	return ret;
}

#define ICE_DCF_32_BIT_WIDTH (CHAR_BIT * 4)
#define ICE_DCF_48_BIT_WIDTH (CHAR_BIT * 6)
#define ICE_DCF_48_BIT_MASK  RTE_LEN2MASK(ICE_DCF_48_BIT_WIDTH, uint64_t)

static void
ice_dcf_stat_update_48(uint64_t *offset, uint64_t *stat)
{
	if (*stat >= *offset)
		*stat = *stat - *offset;
	else
		*stat = (uint64_t)((*stat +
			((uint64_t)1 << ICE_DCF_48_BIT_WIDTH)) - *offset);

	*stat &= ICE_DCF_48_BIT_MASK;
}

static void
ice_dcf_stat_update_32(uint64_t *offset, uint64_t *stat)
{
	if (*stat >= *offset)
		*stat = (uint64_t)(*stat - *offset);
	else
		*stat = (uint64_t)((*stat +
			((uint64_t)1 << ICE_DCF_32_BIT_WIDTH)) - *offset);
}

static void
ice_dcf_update_stats(struct virtchnl_eth_stats *oes,
		     struct virtchnl_eth_stats *nes)
{
	ice_dcf_stat_update_48(&oes->rx_bytes, &nes->rx_bytes);
	ice_dcf_stat_update_48(&oes->rx_unicast, &nes->rx_unicast);
	ice_dcf_stat_update_48(&oes->rx_multicast, &nes->rx_multicast);
	ice_dcf_stat_update_48(&oes->rx_broadcast, &nes->rx_broadcast);
	ice_dcf_stat_update_32(&oes->rx_discards, &nes->rx_discards);
	ice_dcf_stat_update_48(&oes->tx_bytes, &nes->tx_bytes);
	ice_dcf_stat_update_48(&oes->tx_unicast, &nes->tx_unicast);
	ice_dcf_stat_update_48(&oes->tx_multicast, &nes->tx_multicast);
	ice_dcf_stat_update_48(&oes->tx_broadcast, &nes->tx_broadcast);
	ice_dcf_stat_update_32(&oes->tx_errors, &nes->tx_errors);
	ice_dcf_stat_update_32(&oes->tx_discards, &nes->tx_discards);
}


static int
ice_dcf_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
{
	struct ice_dcf_adapter *ad = dev->data->dev_private;
	struct ice_dcf_hw *hw = &ad->real_hw;
	struct virtchnl_eth_stats pstats;
	int ret;

	ret = ice_dcf_query_stats(hw, &pstats);
	if (ret == 0) {
		ice_dcf_update_stats(&hw->eth_stats_offset, &pstats);
		stats->ipackets = pstats.rx_unicast + pstats.rx_multicast +
				pstats.rx_broadcast - pstats.rx_discards;
		stats->opackets = pstats.tx_broadcast + pstats.tx_multicast +
						pstats.tx_unicast;
		stats->imissed = pstats.rx_discards;
		stats->oerrors = pstats.tx_errors + pstats.tx_discards;
		stats->ibytes = pstats.rx_bytes;
		stats->ibytes -= stats->ipackets * RTE_ETHER_CRC_LEN;
		stats->obytes = pstats.tx_bytes;
	} else {
		PMD_DRV_LOG(ERR, "Get statistics failed");
	}
	return ret;
}

static int
ice_dcf_stats_reset(struct rte_eth_dev *dev)
{
	struct ice_dcf_adapter *ad = dev->data->dev_private;
	struct ice_dcf_hw *hw = &ad->real_hw;
	struct virtchnl_eth_stats pstats;
	int ret;

	/* read stat values to clear hardware registers */
	ret = ice_dcf_query_stats(hw, &pstats);
	if (ret != 0)
		return ret;

	/* set stats offset base on current values */
	hw->eth_stats_offset = pstats;

	return 0;
}

static int
ice_dcf_dev_close(struct rte_eth_dev *dev)
{
	struct ice_dcf_adapter *adapter = dev->data->dev_private;

	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
		return 0;

	ice_dcf_uninit_parent_adapter(dev);
	ice_dcf_uninit_hw(dev, &adapter->real_hw);

	return 0;
}

bool
ice_dcf_adminq_need_retry(struct ice_adapter *ad)
{
	return ad->hw.dcf_enabled &&
	       !__atomic_load_n(&ad->dcf_state_on, __ATOMIC_RELAXED);
}

static int
ice_dcf_link_update(__rte_unused struct rte_eth_dev *dev,
		    __rte_unused int wait_to_complete)
{
	return 0;
}

static const struct eth_dev_ops ice_dcf_eth_dev_ops = {
	.dev_start               = ice_dcf_dev_start,
	.dev_stop                = ice_dcf_dev_stop,
	.dev_close               = ice_dcf_dev_close,
	.dev_configure           = ice_dcf_dev_configure,
	.dev_infos_get           = ice_dcf_dev_info_get,
	.rx_queue_setup          = ice_rx_queue_setup,
	.tx_queue_setup          = ice_tx_queue_setup,
	.rx_queue_release        = ice_rx_queue_release,
	.tx_queue_release        = ice_tx_queue_release,
	.rx_queue_start          = ice_dcf_rx_queue_start,
	.tx_queue_start          = ice_dcf_tx_queue_start,
	.rx_queue_stop           = ice_dcf_rx_queue_stop,
	.tx_queue_stop           = ice_dcf_tx_queue_stop,
	.link_update             = ice_dcf_link_update,
	.stats_get               = ice_dcf_stats_get,
	.stats_reset             = ice_dcf_stats_reset,
	.promiscuous_enable      = ice_dcf_dev_promiscuous_enable,
	.promiscuous_disable     = ice_dcf_dev_promiscuous_disable,
	.allmulticast_enable     = ice_dcf_dev_allmulticast_enable,
	.allmulticast_disable    = ice_dcf_dev_allmulticast_disable,
	.filter_ctrl             = ice_dcf_dev_filter_ctrl,
};

static int
ice_dcf_dev_init(struct rte_eth_dev *eth_dev)
{
	struct ice_dcf_adapter *adapter = eth_dev->data->dev_private;
	struct ice_adapter *parent_adapter = &adapter->parent;

	eth_dev->dev_ops = &ice_dcf_eth_dev_ops;
	eth_dev->rx_pkt_burst = ice_dcf_recv_pkts;
	eth_dev->tx_pkt_burst = ice_dcf_xmit_pkts;

	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
		return 0;

	adapter->real_hw.vc_event_msg_cb = ice_dcf_handle_pf_event_msg;
	if (ice_dcf_init_hw(eth_dev, &adapter->real_hw) != 0) {
		PMD_INIT_LOG(ERR, "Failed to init DCF hardware");
		__atomic_store_n(&parent_adapter->dcf_state_on, false,
				 __ATOMIC_RELAXED);
		return -1;
	}

	__atomic_store_n(&parent_adapter->dcf_state_on, true, __ATOMIC_RELAXED);

	if (ice_dcf_init_parent_adapter(eth_dev) != 0) {
		PMD_INIT_LOG(ERR, "Failed to init DCF parent adapter");
		ice_dcf_uninit_hw(eth_dev, &adapter->real_hw);
		return -1;
	}

	return 0;
}

static int
ice_dcf_dev_uninit(struct rte_eth_dev *eth_dev)
{
	ice_dcf_dev_close(eth_dev);

	return 0;
}

static int
ice_dcf_cap_check_handler(__rte_unused const char *key,
			  const char *value, __rte_unused void *opaque)
{
	if (strcmp(value, "dcf"))
		return -1;

	return 0;
}

static int
ice_dcf_cap_selected(struct rte_devargs *devargs)
{
	struct rte_kvargs *kvlist;
	const char *key = "cap";
	int ret = 0;

	if (devargs == NULL)
		return 0;

	kvlist = rte_kvargs_parse(devargs->args, NULL);
	if (kvlist == NULL)
		return 0;

	if (!rte_kvargs_count(kvlist, key))
		goto exit;

	/* dcf capability selected when there's a key-value pair: cap=dcf */
	if (rte_kvargs_process(kvlist, key,
			       ice_dcf_cap_check_handler, NULL) < 0)
		goto exit;

	ret = 1;

exit:
	rte_kvargs_free(kvlist);
	return ret;
}

static int eth_ice_dcf_pci_probe(__rte_unused struct rte_pci_driver *pci_drv,
			     struct rte_pci_device *pci_dev)
{
	if (!ice_dcf_cap_selected(pci_dev->device.devargs))
		return 1;

	return rte_eth_dev_pci_generic_probe(pci_dev,
					     sizeof(struct ice_dcf_adapter),
					     ice_dcf_dev_init);
}

static int eth_ice_dcf_pci_remove(struct rte_pci_device *pci_dev)
{
	return rte_eth_dev_pci_generic_remove(pci_dev, ice_dcf_dev_uninit);
}

static const struct rte_pci_id pci_id_ice_dcf_map[] = {
	{ RTE_PCI_DEVICE(IAVF_INTEL_VENDOR_ID, IAVF_DEV_ID_ADAPTIVE_VF) },
	{ .vendor_id = 0, /* sentinel */ },
};

static struct rte_pci_driver rte_ice_dcf_pmd = {
	.id_table = pci_id_ice_dcf_map,
	.drv_flags = RTE_PCI_DRV_NEED_MAPPING,
	.probe = eth_ice_dcf_pci_probe,
	.remove = eth_ice_dcf_pci_remove,
};

RTE_PMD_REGISTER_PCI(net_ice_dcf, rte_ice_dcf_pmd);
RTE_PMD_REGISTER_PCI_TABLE(net_ice_dcf, pci_id_ice_dcf_map);
RTE_PMD_REGISTER_KMOD_DEP(net_ice_dcf, "* igb_uio | vfio-pci");
RTE_PMD_REGISTER_PARAM_STRING(net_ice_dcf, "cap=dcf");
