net/mrvl: support RSS hashing

[dpdk.git] / drivers / net / mrvl / mrvl_ethdev.c

/*-
 *   BSD LICENSE
 *
 *   Copyright(c) 2017 Semihalf. 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 Semihalf 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 <rte_ethdev.h>
#include <rte_kvargs.h>
#include <rte_log.h>
#include <rte_malloc.h>
#include <rte_vdev.h>

/* Unluckily, container_of is defined by both DPDK and MUSDK,
 * we'll declare only one version.
 *
 * Note that it is not used in this PMD anyway.
 */
#ifdef container_of
#undef container_of
#endif

#include <drivers/mv_pp2.h>
#include <drivers/mv_pp2_bpool.h>
#include <drivers/mv_pp2_hif.h>

#include <fcntl.h>
#include <linux/ethtool.h>
#include <linux/sockios.h>
#include <net/if.h>
#include <net/if_arp.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/types.h>

#include "mrvl_ethdev.h"
#include "mrvl_qos.h"

/* bitmask with reserved hifs */
#define MRVL_MUSDK_HIFS_RESERVED 0x0F
/* bitmask with reserved bpools */
#define MRVL_MUSDK_BPOOLS_RESERVED 0x07
/* bitmask with reserved kernel RSS tables */
#define MRVL_MUSDK_RSS_RESERVED 0x01
/* maximum number of available hifs */
#define MRVL_MUSDK_HIFS_MAX 9

/* prefetch shift */
#define MRVL_MUSDK_PREFETCH_SHIFT 2

/* TCAM has 25 entries reserved for uc/mc filter entries */
#define MRVL_MAC_ADDRS_MAX 25
#define MRVL_MATCH_LEN 16
#define MRVL_PKT_EFFEC_OFFS (MRVL_PKT_OFFS + MV_MH_SIZE)
/* Maximum allowable packet size */
#define MRVL_PKT_SIZE_MAX (10240 - MV_MH_SIZE)

#define MRVL_IFACE_NAME_ARG "iface"
#define MRVL_CFG_ARG "cfg"

#define MRVL_BURST_SIZE 64

#define MRVL_ARP_LENGTH 28

#define MRVL_COOKIE_ADDR_INVALID ~0ULL

#define MRVL_COOKIE_HIGH_ADDR_SHIFT     (sizeof(pp2_cookie_t) * 8)
#define MRVL_COOKIE_HIGH_ADDR_MASK      (~0ULL << MRVL_COOKIE_HIGH_ADDR_SHIFT)

static const char * const valid_args[] = {
        MRVL_IFACE_NAME_ARG,
        MRVL_CFG_ARG,
        NULL
};

static int used_hifs = MRVL_MUSDK_HIFS_RESERVED;
static struct pp2_hif *hifs[RTE_MAX_LCORE];
static int used_bpools[PP2_NUM_PKT_PROC] = {
        MRVL_MUSDK_BPOOLS_RESERVED,
        MRVL_MUSDK_BPOOLS_RESERVED
};

struct pp2_bpool *mrvl_port_to_bpool_lookup[RTE_MAX_ETHPORTS];
int mrvl_port_bpool_size[PP2_NUM_PKT_PROC][PP2_BPOOL_NUM_POOLS][RTE_MAX_LCORE];
uint64_t cookie_addr_high = MRVL_COOKIE_ADDR_INVALID;

/*
 * To use buffer harvesting based on loopback port shadow queue structure
 * was introduced for buffers information bookkeeping.
 *
 * Before sending the packet, related buffer information (pp2_buff_inf) is
 * stored in shadow queue. After packet is transmitted no longer used
 * packet buffer is released back to it's original hardware pool,
 * on condition it originated from interface.
 * In case it  was generated by application itself i.e: mbuf->port field is
 * 0xff then its released to software mempool.
 */
struct mrvl_shadow_txq {
        int head;           /* write index - used when sending buffers */
        int tail;           /* read index - used when releasing buffers */
        u16 size;           /* queue occupied size */
        u16 num_to_release; /* number of buffers sent, that can be released */
        struct buff_release_entry ent[MRVL_PP2_TX_SHADOWQ_SIZE]; /* q entries */
};

struct mrvl_rxq {
        struct mrvl_priv *priv;
        struct rte_mempool *mp;
        int queue_id;
        int port_id;
};

struct mrvl_txq {
        struct mrvl_priv *priv;
        int queue_id;
        int port_id;
};

/*
 * Every tx queue should have dedicated shadow tx queue.
 *
 * Ports assigned by DPDK might not start at zero or be continuous so
 * as a workaround define shadow queues for each possible port so that
 * we eventually fit somewhere.
 */
struct mrvl_shadow_txq shadow_txqs[RTE_MAX_ETHPORTS][RTE_MAX_LCORE];

/** Number of ports configured. */
int mrvl_ports_nb;
static int mrvl_lcore_first;
static int mrvl_lcore_last;

static inline int
mrvl_get_bpool_size(int pp2_id, int pool_id)
{
        int i;
        int size = 0;

        for (i = mrvl_lcore_first; i <= mrvl_lcore_last; i++)
                size += mrvl_port_bpool_size[pp2_id][pool_id][i];

        return size;
}

static inline int
mrvl_reserve_bit(int *bitmap, int max)
{
        int n = sizeof(*bitmap) * 8 - __builtin_clz(*bitmap);

        if (n >= max)
                return -1;

        *bitmap |= 1 << n;

        return n;
}

/**
 * Configure rss based on dpdk rss configuration.
 *
 * @param priv
 *   Pointer to private structure.
 * @param rss_conf
 *   Pointer to RSS configuration.
 *
 * @return
 *   0 on success, negative error value otherwise.
 */
static int
mrvl_configure_rss(struct mrvl_priv *priv, struct rte_eth_rss_conf *rss_conf)
{
        if (rss_conf->rss_key)
                RTE_LOG(WARNING, PMD, "Changing hash key is not supported\n");

        if (rss_conf->rss_hf == 0) {
                priv->ppio_params.inqs_params.hash_type = PP2_PPIO_HASH_T_NONE;
        } else if (rss_conf->rss_hf & ETH_RSS_IPV4) {
                priv->ppio_params.inqs_params.hash_type =
                        PP2_PPIO_HASH_T_2_TUPLE;
        } else if (rss_conf->rss_hf & ETH_RSS_NONFRAG_IPV4_TCP) {
                priv->ppio_params.inqs_params.hash_type =
                        PP2_PPIO_HASH_T_5_TUPLE;
                priv->rss_hf_tcp = 1;
        } else if (rss_conf->rss_hf & ETH_RSS_NONFRAG_IPV4_UDP) {
                priv->ppio_params.inqs_params.hash_type =
                        PP2_PPIO_HASH_T_5_TUPLE;
                priv->rss_hf_tcp = 0;
        } else {
                return -EINVAL;
        }

        return 0;
}

/**
 * Ethernet device configuration.
 *
 * Prepare the driver for a given number of TX and RX queues and
 * configure RSS.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 *
 * @return
 *   0 on success, negative error value otherwise.
 */
static int
mrvl_dev_configure(struct rte_eth_dev *dev)
{
        struct mrvl_priv *priv = dev->data->dev_private;
        int ret;

        if (dev->data->dev_conf.rxmode.mq_mode != ETH_MQ_RX_NONE &&
            dev->data->dev_conf.rxmode.mq_mode != ETH_MQ_RX_RSS) {
                RTE_LOG(INFO, PMD, "Unsupported rx multi queue mode %d\n",
                        dev->data->dev_conf.rxmode.mq_mode);
                return -EINVAL;
        }

        if (!dev->data->dev_conf.rxmode.hw_strip_crc) {
                RTE_LOG(INFO, PMD,
                        "L2 CRC stripping is always enabled in hw\n");
                dev->data->dev_conf.rxmode.hw_strip_crc = 1;
        }

        if (dev->data->dev_conf.rxmode.hw_vlan_strip) {
                RTE_LOG(INFO, PMD, "VLAN stripping not supported\n");
                return -EINVAL;
        }

        if (dev->data->dev_conf.rxmode.split_hdr_size) {
                RTE_LOG(INFO, PMD, "Split headers not supported\n");
                return -EINVAL;
        }

        if (dev->data->dev_conf.rxmode.enable_scatter) {
                RTE_LOG(INFO, PMD, "RX Scatter/Gather not supported\n");
                return -EINVAL;
        }

        if (dev->data->dev_conf.rxmode.enable_lro) {
                RTE_LOG(INFO, PMD, "LRO not supported\n");
                return -EINVAL;
        }

        if (dev->data->dev_conf.rxmode.jumbo_frame)
                dev->data->mtu = dev->data->dev_conf.rxmode.max_rx_pkt_len -
                                 ETHER_HDR_LEN - ETHER_CRC_LEN;

        ret = mrvl_configure_rxqs(priv, dev->data->port_id,
                                  dev->data->nb_rx_queues);
        if (ret < 0)
                return ret;

        priv->ppio_params.outqs_params.num_outqs = dev->data->nb_tx_queues;
        priv->nb_rx_queues = dev->data->nb_rx_queues;

        if (dev->data->nb_rx_queues == 1 &&
            dev->data->dev_conf.rxmode.mq_mode == ETH_MQ_RX_RSS) {
                RTE_LOG(WARNING, PMD, "Disabling hash for 1 rx queue\n");
                priv->ppio_params.inqs_params.hash_type = PP2_PPIO_HASH_T_NONE;

                return 0;
        }

        return mrvl_configure_rss(priv,
                                  &dev->data->dev_conf.rx_adv_conf.rss_conf);
}

/**
 * DPDK callback to change the MTU.
 *
 * Setting the MTU affects hardware MRU (packets larger than the MRU
 * will be dropped).
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 * @param mtu
 *   New MTU.
 *
 * @return
 *   0 on success, negative error value otherwise.
 */
static int
mrvl_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
{
        struct mrvl_priv *priv = dev->data->dev_private;
        /* extra MV_MH_SIZE bytes are required for Marvell tag */
        uint16_t mru = mtu + MV_MH_SIZE + ETHER_HDR_LEN + ETHER_CRC_LEN;
        int ret;

        if (mtu < ETHER_MIN_MTU || mru > MRVL_PKT_SIZE_MAX)
                return -EINVAL;

        ret = pp2_ppio_set_mru(priv->ppio, mru);
        if (ret)
                return ret;

        return pp2_ppio_set_mtu(priv->ppio, mtu);
}

/**
 * DPDK callback to bring the link up.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 *
 * @return
 *   0 on success, negative error value otherwise.
 */
static int
mrvl_dev_set_link_up(struct rte_eth_dev *dev)
{
        struct mrvl_priv *priv = dev->data->dev_private;
        int ret;

        ret = pp2_ppio_enable(priv->ppio);
        if (ret)
                return ret;

        /*
         * mtu/mru can be updated if pp2_ppio_enable() was called at least once
         * as pp2_ppio_enable() changes port->t_mode from default 0 to
         * PP2_TRAFFIC_INGRESS_EGRESS.
         *
         * Set mtu to default DPDK value here.
         */
        ret = mrvl_mtu_set(dev, dev->data->mtu);
        if (ret)
                pp2_ppio_disable(priv->ppio);

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

        return ret;
}

/**
 * DPDK callback to bring the link down.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 *
 * @return
 *   0 on success, negative error value otherwise.
 */
static int
mrvl_dev_set_link_down(struct rte_eth_dev *dev)
{
        struct mrvl_priv *priv = dev->data->dev_private;
        int ret;

        ret = pp2_ppio_disable(priv->ppio);
        if (ret)
                return ret;

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

        return ret;
}

/**
 * DPDK callback to start the device.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 *
 * @return
 *   0 on success, negative errno value on failure.
 */
static int
mrvl_dev_start(struct rte_eth_dev *dev)
{
        struct mrvl_priv *priv = dev->data->dev_private;
        char match[MRVL_MATCH_LEN];
        int ret;

        snprintf(match, sizeof(match), "ppio-%d:%d",
                 priv->pp_id, priv->ppio_id);
        priv->ppio_params.match = match;

        /*
         * Calculate the maximum bpool size for refill feature to 1.5 of the
         * configured size. In case the bpool size will exceed this value,
         * superfluous buffers will be removed
         */
        priv->bpool_max_size = priv->bpool_init_size +
                              (priv->bpool_init_size >> 1);
        /*
         * Calculate the minimum bpool size for refill feature as follows:
         * 2 default burst sizes multiply by number of rx queues.
         * If the bpool size will be below this value, new buffers will
         * be added to the pool.
         */
        priv->bpool_min_size = priv->nb_rx_queues * MRVL_BURST_SIZE * 2;

        ret = pp2_ppio_init(&priv->ppio_params, &priv->ppio);
        if (ret)
                return ret;

        /*
         * In case there are some some stale uc/mc mac addresses flush them
         * here. It cannot be done during mrvl_dev_close() as port information
         * is already gone at that point (due to pp2_ppio_deinit() in
         * mrvl_dev_stop()).
         */
        if (!priv->uc_mc_flushed) {
                ret = pp2_ppio_flush_mac_addrs(priv->ppio, 1, 1);
                if (ret) {
                        RTE_LOG(ERR, PMD,
                                "Failed to flush uc/mc filter list\n");
                        goto out;
                }
                priv->uc_mc_flushed = 1;
        }

        /* For default QoS config, don't start classifier. */
        if (mrvl_qos_cfg) {
                ret = mrvl_start_qos_mapping(priv);
                if (ret) {
                        pp2_ppio_deinit(priv->ppio);
                        return ret;
                }
        }

        ret = mrvl_dev_set_link_up(dev);
        if (ret)
                goto out;

        return 0;
out:
        pp2_ppio_deinit(priv->ppio);
        return ret;
}

/**
 * Flush receive queues.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 */
static void
mrvl_flush_rx_queues(struct rte_eth_dev *dev)
{
        int i;

        RTE_LOG(INFO, PMD, "Flushing rx queues\n");
        for (i = 0; i < dev->data->nb_rx_queues; i++) {
                int ret, num;

                do {
                        struct mrvl_rxq *q = dev->data->rx_queues[i];
                        struct pp2_ppio_desc descs[MRVL_PP2_RXD_MAX];

                        num = MRVL_PP2_RXD_MAX;
                        ret = pp2_ppio_recv(q->priv->ppio,
                                            q->priv->rxq_map[q->queue_id].tc,
                                            q->priv->rxq_map[q->queue_id].inq,
                                            descs, (uint16_t *)&num);
                } while (ret == 0 && num);
        }
}

/**
 * Flush transmit shadow queues.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 */
static void
mrvl_flush_tx_shadow_queues(struct rte_eth_dev *dev)
{
        int i;

        RTE_LOG(INFO, PMD, "Flushing tx shadow queues\n");
        for (i = 0; i < RTE_MAX_LCORE; i++) {
                struct mrvl_shadow_txq *sq =
                        &shadow_txqs[dev->data->port_id][i];

                while (sq->tail != sq->head) {
                        uint64_t addr = cookie_addr_high |
                                        sq->ent[sq->tail].buff.cookie;
                        rte_pktmbuf_free((struct rte_mbuf *)addr);
                        sq->tail = (sq->tail + 1) & MRVL_PP2_TX_SHADOWQ_MASK;
                }

                memset(sq, 0, sizeof(*sq));
        }
}

/**
 * Flush hardware bpool (buffer-pool).
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 */
static void
mrvl_flush_bpool(struct rte_eth_dev *dev)
{
        struct mrvl_priv *priv = dev->data->dev_private;
        uint32_t num;
        int ret;

        ret = pp2_bpool_get_num_buffs(priv->bpool, &num);
        if (ret) {
                RTE_LOG(ERR, PMD, "Failed to get bpool buffers number\n");
                return;
        }

        while (num--) {
                struct pp2_buff_inf inf;
                uint64_t addr;

                ret = pp2_bpool_get_buff(hifs[rte_lcore_id()], priv->bpool,
                                         &inf);
                if (ret)
                        break;

                addr = cookie_addr_high | inf.cookie;
                rte_pktmbuf_free((struct rte_mbuf *)addr);
        }
}

/**
 * DPDK callback to stop the device.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 */
static void
mrvl_dev_stop(struct rte_eth_dev *dev)
{
        struct mrvl_priv *priv = dev->data->dev_private;

        mrvl_dev_set_link_down(dev);
        mrvl_flush_rx_queues(dev);
        mrvl_flush_tx_shadow_queues(dev);
        if (priv->qos_tbl)
                pp2_cls_qos_tbl_deinit(priv->qos_tbl);
        pp2_ppio_deinit(priv->ppio);
        priv->ppio = NULL;
}

/**
 * DPDK callback to close the device.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 */
static void
mrvl_dev_close(struct rte_eth_dev *dev)
{
        struct mrvl_priv *priv = dev->data->dev_private;
        size_t i;

        for (i = 0; i < priv->ppio_params.inqs_params.num_tcs; ++i) {
                struct pp2_ppio_tc_params *tc_params =
                        &priv->ppio_params.inqs_params.tcs_params[i];

                if (tc_params->inqs_params) {
                        rte_free(tc_params->inqs_params);
                        tc_params->inqs_params = NULL;
                }
        }

        mrvl_flush_bpool(dev);
}

/**
 * DPDK callback to retrieve physical link information.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 * @param wait_to_complete
 *   Wait for request completion (ignored).
 *
 * @return
 *   0 on success, negative error value otherwise.
 */
static int
mrvl_link_update(struct rte_eth_dev *dev, int wait_to_complete __rte_unused)
{
        /*
         * TODO
         * once MUSDK provides necessary API use it here
         */
        struct ethtool_cmd edata;
        struct ifreq req;
        int ret, fd;

        edata.cmd = ETHTOOL_GSET;

        strcpy(req.ifr_name, dev->data->name);
        req.ifr_data = (void *)&edata;

        fd = socket(AF_INET, SOCK_DGRAM, 0);
        if (fd == -1)
                return -EFAULT;

        ret = ioctl(fd, SIOCETHTOOL, &req);
        if (ret == -1) {
                close(fd);
                return -EFAULT;
        }

        close(fd);

        switch (ethtool_cmd_speed(&edata)) {
        case SPEED_10:
                dev->data->dev_link.link_speed = ETH_SPEED_NUM_10M;
                break;
        case SPEED_100:
                dev->data->dev_link.link_speed = ETH_SPEED_NUM_100M;
                break;
        case SPEED_1000:
                dev->data->dev_link.link_speed = ETH_SPEED_NUM_1G;
                break;
        case SPEED_10000:
                dev->data->dev_link.link_speed = ETH_SPEED_NUM_10G;
                break;
        default:
                dev->data->dev_link.link_speed = ETH_SPEED_NUM_NONE;
        }

        dev->data->dev_link.link_duplex = edata.duplex ? ETH_LINK_FULL_DUPLEX :
                                                         ETH_LINK_HALF_DUPLEX;
        dev->data->dev_link.link_autoneg = edata.autoneg ? ETH_LINK_AUTONEG :
                                                           ETH_LINK_FIXED;

        return 0;
}

/**
 * DPDK callback to enable promiscuous mode.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 */
static void
mrvl_promiscuous_enable(struct rte_eth_dev *dev)
{
        struct mrvl_priv *priv = dev->data->dev_private;
        int ret;

        ret = pp2_ppio_set_uc_promisc(priv->ppio, 1);
        if (ret)
                RTE_LOG(ERR, PMD, "Failed to enable promiscuous mode\n");
}

/**
 * DPDK callback to enable allmulti mode.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 */
static void
mrvl_allmulticast_enable(struct rte_eth_dev *dev)
{
        struct mrvl_priv *priv = dev->data->dev_private;
        int ret;

        ret = pp2_ppio_set_mc_promisc(priv->ppio, 1);
        if (ret)
                RTE_LOG(ERR, PMD, "Failed enable all-multicast mode\n");
}

/**
 * DPDK callback to disable promiscuous mode.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 */
static void
mrvl_promiscuous_disable(struct rte_eth_dev *dev)
{
        struct mrvl_priv *priv = dev->data->dev_private;
        int ret;

        ret = pp2_ppio_set_uc_promisc(priv->ppio, 0);
        if (ret)
                RTE_LOG(ERR, PMD, "Failed to disable promiscuous mode\n");
}

/**
 * DPDK callback to disable allmulticast mode.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 */
static void
mrvl_allmulticast_disable(struct rte_eth_dev *dev)
{
        struct mrvl_priv *priv = dev->data->dev_private;
        int ret;

        ret = pp2_ppio_set_mc_promisc(priv->ppio, 0);
        if (ret)
                RTE_LOG(ERR, PMD, "Failed to disable all-multicast mode\n");
}

/**
 * DPDK callback to remove a MAC address.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 * @param index
 *   MAC address index.
 */
static void
mrvl_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
{
        struct mrvl_priv *priv = dev->data->dev_private;
        char buf[ETHER_ADDR_FMT_SIZE];
        int ret;

        ret = pp2_ppio_remove_mac_addr(priv->ppio,
                                       dev->data->mac_addrs[index].addr_bytes);
        if (ret) {
                ether_format_addr(buf, sizeof(buf),
                                  &dev->data->mac_addrs[index]);
                RTE_LOG(ERR, PMD, "Failed to remove mac %s\n", buf);
        }
}

/**
 * DPDK callback to add a MAC address.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 * @param mac_addr
 *   MAC address to register.
 * @param index
 *   MAC address index.
 * @param vmdq
 *   VMDq pool index to associate address with (unused).
 *
 * @return
 *   0 on success, negative error value otherwise.
 */
static int
mrvl_mac_addr_add(struct rte_eth_dev *dev, struct ether_addr *mac_addr,
                  uint32_t index, uint32_t vmdq __rte_unused)
{
        struct mrvl_priv *priv = dev->data->dev_private;
        char buf[ETHER_ADDR_FMT_SIZE];
        int ret;

        if (index == 0)
                /* For setting index 0, mrvl_mac_addr_set() should be used.*/
                return -1;

        /*
         * Maximum number of uc addresses can be tuned via kernel module mvpp2x
         * parameter uc_filter_max. Maximum number of mc addresses is then
         * MRVL_MAC_ADDRS_MAX - uc_filter_max. Currently it defaults to 4 and
         * 21 respectively.
         *
         * If more than uc_filter_max uc addresses were added to filter list
         * then NIC will switch to promiscuous mode automatically.
         *
         * If more than MRVL_MAC_ADDRS_MAX - uc_filter_max number mc addresses
         * were added to filter list then NIC will switch to all-multicast mode
         * automatically.
         */
        ret = pp2_ppio_add_mac_addr(priv->ppio, mac_addr->addr_bytes);
        if (ret) {
                ether_format_addr(buf, sizeof(buf), mac_addr);
                RTE_LOG(ERR, PMD, "Failed to add mac %s\n", buf);
                return -1;
        }

        return 0;
}

/**
 * DPDK callback to set the primary MAC address.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 * @param mac_addr
 *   MAC address to register.
 */
static void
mrvl_mac_addr_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
{
        struct mrvl_priv *priv = dev->data->dev_private;

        pp2_ppio_set_mac_addr(priv->ppio, mac_addr->addr_bytes);
        /*
         * TODO
         * Port stops sending packets if pp2_ppio_set_mac_addr()
         * was called after pp2_ppio_enable(). As a quick fix issue
         * enable port once again.
         */
        pp2_ppio_enable(priv->ppio);
}

/**
 * DPDK callback to get information about the device.
 *
 * @param dev
 *   Pointer to Ethernet device structure (unused).
 * @param info
 *   Info structure output buffer.
 */
static void
mrvl_dev_infos_get(struct rte_eth_dev *dev __rte_unused,
                   struct rte_eth_dev_info *info)
{
        info->speed_capa = ETH_LINK_SPEED_10M |
                           ETH_LINK_SPEED_100M |
                           ETH_LINK_SPEED_1G |
                           ETH_LINK_SPEED_10G;

        info->max_rx_queues = MRVL_PP2_RXQ_MAX;
        info->max_tx_queues = MRVL_PP2_TXQ_MAX;
        info->max_mac_addrs = MRVL_MAC_ADDRS_MAX;

        info->rx_desc_lim.nb_max = MRVL_PP2_RXD_MAX;
        info->rx_desc_lim.nb_min = MRVL_PP2_RXD_MIN;
        info->rx_desc_lim.nb_align = MRVL_PP2_RXD_ALIGN;

        info->tx_desc_lim.nb_max = MRVL_PP2_TXD_MAX;
        info->tx_desc_lim.nb_min = MRVL_PP2_TXD_MIN;
        info->tx_desc_lim.nb_align = MRVL_PP2_TXD_ALIGN;

        info->rx_offload_capa = DEV_RX_OFFLOAD_JUMBO_FRAME;
        info->flow_type_rss_offloads = ETH_RSS_IPV4 |
                                       ETH_RSS_NONFRAG_IPV4_TCP |
                                       ETH_RSS_NONFRAG_IPV4_UDP;

        /* By default packets are dropped if no descriptors are available */
        info->default_rxconf.rx_drop_en = 1;

        info->max_rx_pktlen = MRVL_PKT_SIZE_MAX;
}

/**
 * DPDK callback to get information about specific receive queue.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 * @param rx_queue_id
 *   Receive queue index.
 * @param qinfo
 *   Receive queue information structure.
 */
static void mrvl_rxq_info_get(struct rte_eth_dev *dev, uint16_t rx_queue_id,
                              struct rte_eth_rxq_info *qinfo)
{
        struct mrvl_rxq *q = dev->data->rx_queues[rx_queue_id];
        struct mrvl_priv *priv = dev->data->dev_private;
        int inq = priv->rxq_map[rx_queue_id].inq;
        int tc = priv->rxq_map[rx_queue_id].tc;
        struct pp2_ppio_tc_params *tc_params =
                &priv->ppio_params.inqs_params.tcs_params[tc];

        qinfo->mp = q->mp;
        qinfo->nb_desc = tc_params->inqs_params[inq].size;
}

/**
 * DPDK callback to get information about specific transmit queue.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 * @param tx_queue_id
 *   Transmit queue index.
 * @param qinfo
 *   Transmit queue information structure.
 */
static void mrvl_txq_info_get(struct rte_eth_dev *dev, uint16_t tx_queue_id,
                              struct rte_eth_txq_info *qinfo)
{
        struct mrvl_priv *priv = dev->data->dev_private;

        qinfo->nb_desc =
                priv->ppio_params.outqs_params.outqs_params[tx_queue_id].size;
}

/**
 * Release buffers to hardware bpool (buffer-pool)
 *
 * @param rxq
 *   Receive queue pointer.
 * @param num
 *   Number of buffers to release to bpool.
 *
 * @return
 *   0 on success, negative error value otherwise.
 */
static int
mrvl_fill_bpool(struct mrvl_rxq *rxq, int num)
{
        struct buff_release_entry entries[MRVL_PP2_TXD_MAX];
        struct rte_mbuf *mbufs[MRVL_PP2_TXD_MAX];
        int i, ret;
        unsigned int core_id = rte_lcore_id();
        struct pp2_hif *hif = hifs[core_id];
        struct pp2_bpool *bpool = rxq->priv->bpool;

        ret = rte_pktmbuf_alloc_bulk(rxq->mp, mbufs, num);
        if (ret)
                return ret;

        if (cookie_addr_high == MRVL_COOKIE_ADDR_INVALID)
                cookie_addr_high =
                        (uint64_t)mbufs[0] & MRVL_COOKIE_HIGH_ADDR_MASK;

        for (i = 0; i < num; i++) {
                if (((uint64_t)mbufs[i] & MRVL_COOKIE_HIGH_ADDR_MASK)
                        != cookie_addr_high) {
                        RTE_LOG(ERR, PMD,
                                "mbuf virtual addr high 0x%lx out of range\n",
                                (uint64_t)mbufs[i] >> 32);
                        goto out;
                }

                entries[i].buff.addr =
                        rte_mbuf_data_dma_addr_default(mbufs[i]);
                entries[i].buff.cookie = (pp2_cookie_t)(uint64_t)mbufs[i];
                entries[i].bpool = bpool;
        }

        pp2_bpool_put_buffs(hif, entries, (uint16_t *)&i);
        mrvl_port_bpool_size[bpool->pp2_id][bpool->id][core_id] += i;

        if (i != num)
                goto out;

        return 0;
out:
        for (; i < num; i++)
                rte_pktmbuf_free(mbufs[i]);

        return -1;
}

/**
 * DPDK callback to configure the receive queue.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 * @param idx
 *   RX queue index.
 * @param desc
 *   Number of descriptors to configure in queue.
 * @param socket
 *   NUMA socket on which memory must be allocated.
 * @param conf
 *   Thresholds parameters (unused_).
 * @param mp
 *   Memory pool for buffer allocations.
 *
 * @return
 *   0 on success, negative error value otherwise.
 */
static int
mrvl_rx_queue_setup(struct rte_eth_dev *dev, uint16_t idx, uint16_t desc,
                    unsigned int socket,
                    const struct rte_eth_rxconf *conf __rte_unused,
                    struct rte_mempool *mp)
{
        struct mrvl_priv *priv = dev->data->dev_private;
        struct mrvl_rxq *rxq;
        uint32_t min_size,
                 max_rx_pkt_len = dev->data->dev_conf.rxmode.max_rx_pkt_len;
        int ret, tc, inq;

        if (priv->rxq_map[idx].tc == MRVL_UNKNOWN_TC) {
                /*
                 * Unknown TC mapping, mapping will not have a correct queue.
                 */
                RTE_LOG(ERR, PMD, "Unknown TC mapping for queue %hu eth%hhu\n",
                        idx, priv->ppio_id);
                return -EFAULT;
        }

        min_size = rte_pktmbuf_data_room_size(mp) - RTE_PKTMBUF_HEADROOM -
                   MRVL_PKT_EFFEC_OFFS;
        if (min_size < max_rx_pkt_len) {
                RTE_LOG(ERR, PMD,
                        "Mbuf size must be increased to %u bytes to hold up to %u bytes of data.\n",
                        max_rx_pkt_len + RTE_PKTMBUF_HEADROOM +
                        MRVL_PKT_EFFEC_OFFS,
                        max_rx_pkt_len);
                return -EINVAL;
        }

        if (dev->data->rx_queues[idx]) {
                rte_free(dev->data->rx_queues[idx]);
                dev->data->rx_queues[idx] = NULL;
        }

        rxq = rte_zmalloc_socket("rxq", sizeof(*rxq), 0, socket);
        if (!rxq)
                return -ENOMEM;

        rxq->priv = priv;
        rxq->mp = mp;
        rxq->queue_id = idx;
        rxq->port_id = dev->data->port_id;
        mrvl_port_to_bpool_lookup[rxq->port_id] = priv->bpool;

        tc = priv->rxq_map[rxq->queue_id].tc,
        inq = priv->rxq_map[rxq->queue_id].inq;
        priv->ppio_params.inqs_params.tcs_params[tc].inqs_params[inq].size =
                desc;

        ret = mrvl_fill_bpool(rxq, desc);
        if (ret) {
                rte_free(rxq);
                return ret;
        }

        priv->bpool_init_size += desc;

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

        return 0;
}

/**
 * DPDK callback to release the receive queue.
 *
 * @param rxq
 *   Generic receive queue pointer.
 */
static void
mrvl_rx_queue_release(void *rxq)
{
        struct mrvl_rxq *q = rxq;
        struct pp2_ppio_tc_params *tc_params;
        int i, num, tc, inq;

        if (!q)
                return;

        tc = q->priv->rxq_map[q->queue_id].tc;
        inq = q->priv->rxq_map[q->queue_id].inq;
        tc_params = &q->priv->ppio_params.inqs_params.tcs_params[tc];
        num = tc_params->inqs_params[inq].size;
        for (i = 0; i < num; i++) {
                struct pp2_buff_inf inf;
                uint64_t addr;

                pp2_bpool_get_buff(hifs[rte_lcore_id()], q->priv->bpool, &inf);
                addr = cookie_addr_high | inf.cookie;
                rte_pktmbuf_free((struct rte_mbuf *)addr);
        }

        rte_free(q);
}

/**
 * DPDK callback to configure the transmit queue.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 * @param idx
 *   Transmit queue index.
 * @param desc
 *   Number of descriptors to configure in the queue.
 * @param socket
 *   NUMA socket on which memory must be allocated.
 * @param conf
 *   Thresholds parameters (unused).
 *
 * @return
 *   0 on success, negative error value otherwise.
 */
static int
mrvl_tx_queue_setup(struct rte_eth_dev *dev, uint16_t idx, uint16_t desc,
                    unsigned int socket,
                    const struct rte_eth_txconf *conf __rte_unused)
{
        struct mrvl_priv *priv = dev->data->dev_private;
        struct mrvl_txq *txq;

        if (dev->data->tx_queues[idx]) {
                rte_free(dev->data->tx_queues[idx]);
                dev->data->tx_queues[idx] = NULL;
        }

        txq = rte_zmalloc_socket("txq", sizeof(*txq), 0, socket);
        if (!txq)
                return -ENOMEM;

        txq->priv = priv;
        txq->queue_id = idx;
        txq->port_id = dev->data->port_id;
        dev->data->tx_queues[idx] = txq;

        priv->ppio_params.outqs_params.outqs_params[idx].size = desc;
        priv->ppio_params.outqs_params.outqs_params[idx].weight = 1;

        return 0;
}

/**
 * DPDK callback to release the transmit queue.
 *
 * @param txq
 *   Generic transmit queue pointer.
 */
static void
mrvl_tx_queue_release(void *txq)
{
        struct mrvl_txq *q = txq;

        if (!q)
                return;

        rte_free(q);
}

/**
 * Update RSS hash configuration
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 * @param rss_conf
 *   Pointer to RSS configuration.
 *
 * @return
 *   0 on success, negative error value otherwise.
 */
static int
mrvl_rss_hash_update(struct rte_eth_dev *dev,
                     struct rte_eth_rss_conf *rss_conf)
{
        struct mrvl_priv *priv = dev->data->dev_private;

        return mrvl_configure_rss(priv, rss_conf);
}

/**
 * DPDK callback to get RSS hash configuration.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 * @rss_conf
 *   Pointer to RSS configuration.
 *
 * @return
 *   Always 0.
 */
static int
mrvl_rss_hash_conf_get(struct rte_eth_dev *dev,
                       struct rte_eth_rss_conf *rss_conf)
{
        struct mrvl_priv *priv = dev->data->dev_private;
        enum pp2_ppio_hash_type hash_type =
                priv->ppio_params.inqs_params.hash_type;

        rss_conf->rss_key = NULL;

        if (hash_type == PP2_PPIO_HASH_T_NONE)
                rss_conf->rss_hf = 0;
        else if (hash_type == PP2_PPIO_HASH_T_2_TUPLE)
                rss_conf->rss_hf = ETH_RSS_IPV4;
        else if (hash_type == PP2_PPIO_HASH_T_5_TUPLE && priv->rss_hf_tcp)
                rss_conf->rss_hf = ETH_RSS_NONFRAG_IPV4_TCP;
        else if (hash_type == PP2_PPIO_HASH_T_5_TUPLE && !priv->rss_hf_tcp)
                rss_conf->rss_hf = ETH_RSS_NONFRAG_IPV4_UDP;

        return 0;
}

static const struct eth_dev_ops mrvl_ops = {
        .dev_configure = mrvl_dev_configure,
        .dev_start = mrvl_dev_start,
        .dev_stop = mrvl_dev_stop,
        .dev_set_link_up = mrvl_dev_set_link_up,
        .dev_set_link_down = mrvl_dev_set_link_down,
        .dev_close = mrvl_dev_close,
        .link_update = mrvl_link_update,
        .promiscuous_enable = mrvl_promiscuous_enable,
        .allmulticast_enable = mrvl_allmulticast_enable,
        .promiscuous_disable = mrvl_promiscuous_disable,
        .allmulticast_disable = mrvl_allmulticast_disable,
        .mac_addr_remove = mrvl_mac_addr_remove,
        .mac_addr_add = mrvl_mac_addr_add,
        .mac_addr_set = mrvl_mac_addr_set,
        .mtu_set = mrvl_mtu_set,
        .dev_infos_get = mrvl_dev_infos_get,
        .rxq_info_get = mrvl_rxq_info_get,
        .txq_info_get = mrvl_txq_info_get,
        .rx_queue_setup = mrvl_rx_queue_setup,
        .rx_queue_release = mrvl_rx_queue_release,
        .tx_queue_setup = mrvl_tx_queue_setup,
        .tx_queue_release = mrvl_tx_queue_release,
        .rss_hash_update = mrvl_rss_hash_update,
        .rss_hash_conf_get = mrvl_rss_hash_conf_get,
};

/**
 * DPDK callback for receive.
 *
 * @param rxq
 *   Generic pointer to the receive queue.
 * @param rx_pkts
 *   Array to store received packets.
 * @param nb_pkts
 *   Maximum number of packets in array.
 *
 * @return
 *   Number of packets successfully received.
 */
static uint16_t
mrvl_rx_pkt_burst(void *rxq, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
{
        struct mrvl_rxq *q = rxq;
        struct pp2_ppio_desc descs[nb_pkts];
        struct pp2_bpool *bpool;
        int i, ret, rx_done = 0;
        int num;
        unsigned int core_id = rte_lcore_id();

        if (unlikely(!q->priv->ppio))
                return 0;

        bpool = q->priv->bpool;

        ret = pp2_ppio_recv(q->priv->ppio, q->priv->rxq_map[q->queue_id].tc,
                            q->priv->rxq_map[q->queue_id].inq, descs, &nb_pkts);
        if (unlikely(ret < 0)) {
                RTE_LOG(ERR, PMD, "Failed to receive packets\n");
                return 0;
        }
        mrvl_port_bpool_size[bpool->pp2_id][bpool->id][core_id] -= nb_pkts;

        for (i = 0; i < nb_pkts; i++) {
                struct rte_mbuf *mbuf;
                enum pp2_inq_desc_status status;
                uint64_t addr;

                if (likely(nb_pkts - i > MRVL_MUSDK_PREFETCH_SHIFT)) {
                        struct pp2_ppio_desc *pref_desc;
                        u64 pref_addr;

                        pref_desc = &descs[i + MRVL_MUSDK_PREFETCH_SHIFT];
                        pref_addr = cookie_addr_high |
                                    pp2_ppio_inq_desc_get_cookie(pref_desc);
                        rte_mbuf_prefetch_part1((struct rte_mbuf *)(pref_addr));
                        rte_mbuf_prefetch_part2((struct rte_mbuf *)(pref_addr));
                }

                addr = cookie_addr_high |
                       pp2_ppio_inq_desc_get_cookie(&descs[i]);
                mbuf = (struct rte_mbuf *)addr;
                rte_pktmbuf_reset(mbuf);

                /* drop packet in case of mac, overrun or resource error */
                status = pp2_ppio_inq_desc_get_l2_pkt_error(&descs[i]);
                if (unlikely(status != PP2_DESC_ERR_OK)) {
                        struct pp2_buff_inf binf = {
                                .addr = rte_mbuf_data_dma_addr_default(mbuf),
                                .cookie = (pp2_cookie_t)(uint64_t)mbuf,
                        };

                        pp2_bpool_put_buff(hifs[core_id], bpool, &binf);
                        mrvl_port_bpool_size
                                [bpool->pp2_id][bpool->id][core_id]++;
                        continue;
                }

                mbuf->data_off += MRVL_PKT_EFFEC_OFFS;
                mbuf->pkt_len = pp2_ppio_inq_desc_get_pkt_len(&descs[i]);
                mbuf->data_len = mbuf->pkt_len;
                mbuf->port = q->port_id;

                rx_pkts[rx_done++] = mbuf;
        }

        if (rte_spinlock_trylock(&q->priv->lock) == 1) {
                num = mrvl_get_bpool_size(bpool->pp2_id, bpool->id);

                if (unlikely(num <= q->priv->bpool_min_size ||
                             (!rx_done && num < q->priv->bpool_init_size))) {
                        ret = mrvl_fill_bpool(q, MRVL_BURST_SIZE);
                        if (ret)
                                RTE_LOG(ERR, PMD, "Failed to fill bpool\n");
                } else if (unlikely(num > q->priv->bpool_max_size)) {
                        int i;
                        int pkt_to_remove = num - q->priv->bpool_init_size;
                        struct rte_mbuf *mbuf;
                        struct pp2_buff_inf buff;

                        RTE_LOG(DEBUG, PMD,
                                "\nport-%d:%d: bpool %d oversize - remove %d buffers (pool size: %d -> %d)\n",
                                bpool->pp2_id, q->priv->ppio->port_id,
                                bpool->id, pkt_to_remove, num,
                                q->priv->bpool_init_size);

                        for (i = 0; i < pkt_to_remove; i++) {
                                pp2_bpool_get_buff(hifs[core_id], bpool, &buff);
                                mbuf = (struct rte_mbuf *)
                                        (cookie_addr_high | buff.cookie);
                                rte_pktmbuf_free(mbuf);
                        }
                        mrvl_port_bpool_size
                                [bpool->pp2_id][bpool->id][core_id] -=
                                                                pkt_to_remove;
                }
                rte_spinlock_unlock(&q->priv->lock);
        }

        return rx_done;
}

/**
 * Release already sent buffers to bpool (buffer-pool).
 *
 * @param ppio
 *   Pointer to the port structure.
 * @param hif
 *   Pointer to the MUSDK hardware interface.
 * @param sq
 *   Pointer to the shadow queue.
 * @param qid
 *   Queue id number.
 * @param force
 *   Force releasing packets.
 */
static inline void
mrvl_free_sent_buffers(struct pp2_ppio *ppio, struct pp2_hif *hif,
                       struct mrvl_shadow_txq *sq, int qid, int force)
{
        struct buff_release_entry *entry;
        uint16_t nb_done = 0, num = 0, skip_bufs = 0;
        int i, core_id = rte_lcore_id();

        pp2_ppio_get_num_outq_done(ppio, hif, qid, &nb_done);

        sq->num_to_release += nb_done;

        if (likely(!force &&
                   sq->num_to_release < MRVL_PP2_BUF_RELEASE_BURST_SIZE))
                return;

        nb_done = sq->num_to_release;
        sq->num_to_release = 0;

        for (i = 0; i < nb_done; i++) {
                entry = &sq->ent[sq->tail + num];
                if (unlikely(!entry->buff.addr)) {
                        RTE_LOG(ERR, PMD,
                                "Shadow memory @%d: cookie(%lx), pa(%lx)!\n",
                                sq->tail, (u64)entry->buff.cookie,
                                (u64)entry->buff.addr);
                        skip_bufs = 1;
                        goto skip;
                }

                if (unlikely(!entry->bpool)) {
                        struct rte_mbuf *mbuf;

                        mbuf = (struct rte_mbuf *)
                               (cookie_addr_high | entry->buff.cookie);
                        rte_pktmbuf_free(mbuf);
                        skip_bufs = 1;
                        goto skip;
                }

                mrvl_port_bpool_size
                        [entry->bpool->pp2_id][entry->bpool->id][core_id]++;
                num++;
                if (unlikely(sq->tail + num == MRVL_PP2_TX_SHADOWQ_SIZE))
                        goto skip;
                continue;
skip:
                if (likely(num))
                        pp2_bpool_put_buffs(hif, &sq->ent[sq->tail], &num);
                num += skip_bufs;
                sq->tail = (sq->tail + num) & MRVL_PP2_TX_SHADOWQ_MASK;
                sq->size -= num;
                num = 0;
        }

        if (likely(num)) {
                pp2_bpool_put_buffs(hif, &sq->ent[sq->tail], &num);
                sq->tail = (sq->tail + num) & MRVL_PP2_TX_SHADOWQ_MASK;
                sq->size -= num;
        }
}

/**
 * DPDK callback for transmit.
 *
 * @param txq
 *   Generic pointer transmit queue.
 * @param tx_pkts
 *   Packets to transmit.
 * @param nb_pkts
 *   Number of packets in array.
 *
 * @return
 *   Number of packets successfully transmitted.
 */
static uint16_t
mrvl_tx_pkt_burst(void *txq, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
{
        struct mrvl_txq *q = txq;
        struct mrvl_shadow_txq *sq = &shadow_txqs[q->port_id][rte_lcore_id()];
        struct pp2_hif *hif = hifs[rte_lcore_id()];
        struct pp2_ppio_desc descs[nb_pkts];
        int i;
        uint16_t num, sq_free_size;

        if (unlikely(!q->priv->ppio))
                return 0;

        if (sq->size)
                mrvl_free_sent_buffers(q->priv->ppio, hif, sq, q->queue_id, 0);

        sq_free_size = MRVL_PP2_TX_SHADOWQ_SIZE - sq->size - 1;
        if (unlikely(nb_pkts > sq_free_size)) {
                RTE_LOG(DEBUG, PMD,
                        "No room in shadow queue for %d packets! %d packets will be sent.\n",
                        nb_pkts, sq_free_size);
                nb_pkts = sq_free_size;
        }

        for (i = 0; i < nb_pkts; i++) {
                struct rte_mbuf *mbuf = tx_pkts[i];

                if (likely(nb_pkts - i > MRVL_MUSDK_PREFETCH_SHIFT)) {
                        struct rte_mbuf *pref_pkt_hdr;

                        pref_pkt_hdr = tx_pkts[i + MRVL_MUSDK_PREFETCH_SHIFT];
                        rte_mbuf_prefetch_part1(pref_pkt_hdr);
                        rte_mbuf_prefetch_part2(pref_pkt_hdr);
                }

                sq->ent[sq->head].buff.cookie = (pp2_cookie_t)(uint64_t)mbuf;
                sq->ent[sq->head].buff.addr =
                        rte_mbuf_data_dma_addr_default(mbuf);
                sq->ent[sq->head].bpool =
                        (unlikely(mbuf->port == 0xff || mbuf->refcnt > 1)) ?
                         NULL : mrvl_port_to_bpool_lookup[mbuf->port];
                sq->head = (sq->head + 1) & MRVL_PP2_TX_SHADOWQ_MASK;
                sq->size++;

                pp2_ppio_outq_desc_reset(&descs[i]);
                pp2_ppio_outq_desc_set_phys_addr(&descs[i],
                                                 rte_pktmbuf_mtophys(mbuf));
                pp2_ppio_outq_desc_set_pkt_offset(&descs[i], 0);
                pp2_ppio_outq_desc_set_pkt_len(&descs[i],
                                               rte_pktmbuf_pkt_len(mbuf));
        }

        num = nb_pkts;
        pp2_ppio_send(q->priv->ppio, hif, q->queue_id, descs, &nb_pkts);
        /* number of packets that were not sent */
        if (unlikely(num > nb_pkts)) {
                for (i = nb_pkts; i < num; i++) {
                        sq->head = (MRVL_PP2_TX_SHADOWQ_SIZE + sq->head - 1) &
                                MRVL_PP2_TX_SHADOWQ_MASK;
                }
                sq->size -= num - nb_pkts;
        }

        return nb_pkts;
}

/**
 * Initialize packet processor.
 *
 * @return
 *   0 on success, negative error value otherwise.
 */
static int
mrvl_init_pp2(void)
{
        struct pp2_init_params init_params;

        memset(&init_params, 0, sizeof(init_params));
        init_params.hif_reserved_map = MRVL_MUSDK_HIFS_RESERVED;
        init_params.bm_pool_reserved_map = MRVL_MUSDK_BPOOLS_RESERVED;
        init_params.rss_tbl_reserved_map = MRVL_MUSDK_RSS_RESERVED;

        return pp2_init(&init_params);
}

/**
 * Deinitialize packet processor.
 *
 * @return
 *   0 on success, negative error value otherwise.
 */
static void
mrvl_deinit_pp2(void)
{
        pp2_deinit();
}

/**
 * Create private device structure.
 *
 * @param dev_name
 *   Pointer to the port name passed in the initialization parameters.
 *
 * @return
 *   Pointer to the newly allocated private device structure.
 */
static struct mrvl_priv *
mrvl_priv_create(const char *dev_name)
{
        struct pp2_bpool_params bpool_params;
        char match[MRVL_MATCH_LEN];
        struct mrvl_priv *priv;
        int ret, bpool_bit;

        priv = rte_zmalloc_socket(dev_name, sizeof(*priv), 0, rte_socket_id());
        if (!priv)
                return NULL;

        ret = pp2_netdev_get_ppio_info((char *)(uintptr_t)dev_name,
                                       &priv->pp_id, &priv->ppio_id);
        if (ret)
                goto out_free_priv;

        bpool_bit = mrvl_reserve_bit(&used_bpools[priv->pp_id],
                                     PP2_BPOOL_NUM_POOLS);
        if (bpool_bit < 0)
                goto out_free_priv;
        priv->bpool_bit = bpool_bit;

        snprintf(match, sizeof(match), "pool-%d:%d", priv->pp_id,
                 priv->bpool_bit);
        memset(&bpool_params, 0, sizeof(bpool_params));
        bpool_params.match = match;
        bpool_params.buff_len = MRVL_PKT_SIZE_MAX + MRVL_PKT_EFFEC_OFFS;
        ret = pp2_bpool_init(&bpool_params, &priv->bpool);
        if (ret)
                goto out_clear_bpool_bit;

        priv->ppio_params.type = PP2_PPIO_T_NIC;
        rte_spinlock_init(&priv->lock);

        return priv;
out_clear_bpool_bit:
        used_bpools[priv->pp_id] &= ~(1 << priv->bpool_bit);
out_free_priv:
        rte_free(priv);
        return NULL;
}

/**
 * Create device representing Ethernet port.
 *
 * @param name
 *   Pointer to the port's name.
 *
 * @return
 *   0 on success, negative error value otherwise.
 */
static int
mrvl_eth_dev_create(struct rte_vdev_device *vdev, const char *name)
{
        int ret, fd = socket(AF_INET, SOCK_DGRAM, 0);
        struct rte_eth_dev *eth_dev;
        struct mrvl_priv *priv;
        struct ifreq req;

        eth_dev = rte_eth_dev_allocate(name);
        if (!eth_dev)
                return -ENOMEM;

        priv = mrvl_priv_create(name);
        if (!priv) {
                ret = -ENOMEM;
                goto out_free_dev;
        }

        eth_dev->data->mac_addrs =
                rte_zmalloc("mac_addrs",
                            ETHER_ADDR_LEN * MRVL_MAC_ADDRS_MAX, 0);
        if (!eth_dev->data->mac_addrs) {
                RTE_LOG(ERR, PMD, "Failed to allocate space for eth addrs\n");
                ret = -ENOMEM;
                goto out_free_priv;
        }

        memset(&req, 0, sizeof(req));
        strcpy(req.ifr_name, name);
        ret = ioctl(fd, SIOCGIFHWADDR, &req);
        if (ret)
                goto out_free_mac;

        memcpy(eth_dev->data->mac_addrs[0].addr_bytes,
               req.ifr_addr.sa_data, ETHER_ADDR_LEN);

        eth_dev->rx_pkt_burst = mrvl_rx_pkt_burst;
        eth_dev->tx_pkt_burst = mrvl_tx_pkt_burst;
        eth_dev->data->dev_private = priv;
        eth_dev->device = &vdev->device;
        eth_dev->dev_ops = &mrvl_ops;

        return 0;
out_free_mac:
        rte_free(eth_dev->data->mac_addrs);
out_free_dev:
        rte_eth_dev_release_port(eth_dev);
out_free_priv:
        rte_free(priv);

        return ret;
}

/**
 * Cleanup previously created device representing Ethernet port.
 *
 * @param name
 *   Pointer to the port name.
 */
static void
mrvl_eth_dev_destroy(const char *name)
{
        struct rte_eth_dev *eth_dev;
        struct mrvl_priv *priv;

        eth_dev = rte_eth_dev_allocated(name);
        if (!eth_dev)
                return;

        priv = eth_dev->data->dev_private;
        pp2_bpool_deinit(priv->bpool);
        rte_free(priv);
        rte_free(eth_dev->data->mac_addrs);
        rte_eth_dev_release_port(eth_dev);
}

/**
 * Callback used by rte_kvargs_process() during argument parsing.
 *
 * @param key
 *   Pointer to the parsed key (unused).
 * @param value
 *   Pointer to the parsed value.
 * @param extra_args
 *   Pointer to the extra arguments which contains address of the
 *   table of pointers to parsed interface names.
 *
 * @return
 *   Always 0.
 */
static int
mrvl_get_ifnames(const char *key __rte_unused, const char *value,
                 void *extra_args)
{
        const char **ifnames = extra_args;

        ifnames[mrvl_ports_nb++] = value;

        return 0;
}

/**
 * Initialize per-lcore MUSDK hardware interfaces (hifs).
 *
 * @return
 *   0 on success, negative error value otherwise.
 */
static int
mrvl_init_hifs(void)
{
        struct pp2_hif_params params;
        char match[MRVL_MATCH_LEN];
        int i, ret;

        RTE_LCORE_FOREACH(i) {
                ret = mrvl_reserve_bit(&used_hifs, MRVL_MUSDK_HIFS_MAX);
                if (ret < 0)
                        return ret;

                snprintf(match, sizeof(match), "hif-%d", ret);
                memset(&params, 0, sizeof(params));
                params.match = match;
                params.out_size = MRVL_PP2_AGGR_TXQD_MAX;
                ret = pp2_hif_init(&params, &hifs[i]);
                if (ret) {
                        RTE_LOG(ERR, PMD, "Failed to initialize hif %d\n", i);
                        return ret;
                }
        }

        return 0;
}

/**
 * Deinitialize per-lcore MUSDK hardware interfaces (hifs).
 */
static void
mrvl_deinit_hifs(void)
{
        int i;

        RTE_LCORE_FOREACH(i) {
                if (hifs[i])
                        pp2_hif_deinit(hifs[i]);
        }
}

static void mrvl_set_first_last_cores(int core_id)
{
        if (core_id < mrvl_lcore_first)
                mrvl_lcore_first = core_id;

        if (core_id > mrvl_lcore_last)
                mrvl_lcore_last = core_id;
}

/**
 * DPDK callback to register the virtual device.
 *
 * @param vdev
 *   Pointer to the virtual device.
 *
 * @return
 *   0 on success, negative error value otherwise.
 */
static int
rte_pmd_mrvl_probe(struct rte_vdev_device *vdev)
{
        struct rte_kvargs *kvlist;
        const char *ifnames[PP2_NUM_ETH_PPIO * PP2_NUM_PKT_PROC];
        int ret = -EINVAL;
        uint32_t i, ifnum, cfgnum, core_id;
        const char *params;

        params = rte_vdev_device_args(vdev);
        if (!params)
                return -EINVAL;

        kvlist = rte_kvargs_parse(params, valid_args);
        if (!kvlist)
                return -EINVAL;

        ifnum = rte_kvargs_count(kvlist, MRVL_IFACE_NAME_ARG);
        if (ifnum > RTE_DIM(ifnames))
                goto out_free_kvlist;

        rte_kvargs_process(kvlist, MRVL_IFACE_NAME_ARG,
                           mrvl_get_ifnames, &ifnames);

        cfgnum = rte_kvargs_count(kvlist, MRVL_CFG_ARG);
        if (cfgnum > 1) {
                RTE_LOG(ERR, PMD, "Cannot handle more than one config file!\n");
                goto out_free_kvlist;
        } else if (cfgnum == 1) {
                rte_kvargs_process(kvlist, MRVL_CFG_ARG,
                                   mrvl_get_qoscfg, &mrvl_qos_cfg);
        }

        /*
         * ret == -EEXIST is correct, it means DMA
         * has been already initialized (by another PMD).
         */
        ret = mv_sys_dma_mem_init(RTE_MRVL_MUSDK_DMA_MEMSIZE);
        if (ret < 0 && ret != -EEXIST)
                goto out_free_kvlist;

        ret = mrvl_init_pp2();
        if (ret) {
                RTE_LOG(ERR, PMD, "Failed to init PP!\n");
                goto out_deinit_dma;
        }

        ret = mrvl_init_hifs();
        if (ret)
                goto out_deinit_hifs;

        for (i = 0; i < ifnum; i++) {
                RTE_LOG(INFO, PMD, "Creating %s\n", ifnames[i]);
                ret = mrvl_eth_dev_create(vdev, ifnames[i]);
                if (ret)
                        goto out_cleanup;
        }

        rte_kvargs_free(kvlist);

        memset(mrvl_port_bpool_size, 0, sizeof(mrvl_port_bpool_size));

        mrvl_lcore_first = RTE_MAX_LCORE;
        mrvl_lcore_last = 0;

        RTE_LCORE_FOREACH(core_id) {
                mrvl_set_first_last_cores(core_id);
        }

        return 0;
out_cleanup:
        for (; i > 0; i--)
                mrvl_eth_dev_destroy(ifnames[i]);
out_deinit_hifs:
        mrvl_deinit_hifs();
        mrvl_deinit_pp2();
out_deinit_dma:
        mv_sys_dma_mem_destroy();
out_free_kvlist:
        rte_kvargs_free(kvlist);

        return ret;
}

/**
 * DPDK callback to remove virtual device.
 *
 * @param vdev
 *   Pointer to the removed virtual device.
 *
 * @return
 *   0 on success, negative error value otherwise.
 */
static int
rte_pmd_mrvl_remove(struct rte_vdev_device *vdev)
{
        int i;
        const char *name;

        name = rte_vdev_device_name(vdev);
        if (!name)
                return -EINVAL;

        RTE_LOG(INFO, PMD, "Removing %s\n", name);

        for (i = 0; i < rte_eth_dev_count(); i++) {
                char ifname[RTE_ETH_NAME_MAX_LEN];

                rte_eth_dev_get_name_by_port(i, ifname);
                mrvl_eth_dev_destroy(ifname);
        }

        mrvl_deinit_hifs();
        mrvl_deinit_pp2();
        mv_sys_dma_mem_destroy();

        return 0;
}

static struct rte_vdev_driver pmd_mrvl_drv = {
        .probe = rte_pmd_mrvl_probe,
        .remove = rte_pmd_mrvl_remove,
};

RTE_PMD_REGISTER_VDEV(net_mrvl, pmd_mrvl_drv);
RTE_PMD_REGISTER_ALIAS(net_mrvl, eth_mrvl);