update sources to ceph Nautilus 14.2.1

[ceph.git] / ceph / src / seastar / dpdk / drivers / net / af_packet / rte_eth_af_packet.c

/*-
 *   BSD LICENSE
 *
 *   Copyright(c) 2014 John W. Linville <linville@tuxdriver.com>
 *
 *   Originally based upon librte_pmd_pcap code:
 *
 *   Copyright(c) 2010-2015 Intel Corporation. All rights reserved.
 *   Copyright(c) 2014 6WIND S.A.
 *   All rights reserved.
 *
 *   Redistribution and use in source and binary forms, with or without
 *   modification, are permitted provided that the following conditions
 *   are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in
 *       the documentation and/or other materials provided with the
 *       distribution.
 *     * Neither the name of Intel Corporation nor the names of its
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <rte_mbuf.h>
#include <rte_ethdev.h>
#include <rte_ethdev_vdev.h>
#include <rte_malloc.h>
#include <rte_kvargs.h>
#include <rte_vdev.h>

#include <linux/if_ether.h>
#include <linux/if_packet.h>
#include <arpa/inet.h>
#include <net/if.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <unistd.h>
#include <poll.h>

#define ETH_AF_PACKET_IFACE_ARG         "iface"
#define ETH_AF_PACKET_NUM_Q_ARG         "qpairs"
#define ETH_AF_PACKET_BLOCKSIZE_ARG     "blocksz"
#define ETH_AF_PACKET_FRAMESIZE_ARG     "framesz"
#define ETH_AF_PACKET_FRAMECOUNT_ARG    "framecnt"

#define DFLT_BLOCK_SIZE         (1 << 12)
#define DFLT_FRAME_SIZE         (1 << 11)
#define DFLT_FRAME_COUNT        (1 << 9)

#define RTE_PMD_AF_PACKET_MAX_RINGS 16

struct pkt_rx_queue {
        int sockfd;

        struct iovec *rd;
        uint8_t *map;
        unsigned int framecount;
        unsigned int framenum;

        struct rte_mempool *mb_pool;
        uint8_t in_port;

        volatile unsigned long rx_pkts;
        volatile unsigned long err_pkts;
        volatile unsigned long rx_bytes;
};

struct pkt_tx_queue {
        int sockfd;
        unsigned int frame_data_size;

        struct iovec *rd;
        uint8_t *map;
        unsigned int framecount;
        unsigned int framenum;

        volatile unsigned long tx_pkts;
        volatile unsigned long err_pkts;
        volatile unsigned long tx_bytes;
};

struct pmd_internals {
        unsigned nb_queues;

        int if_index;
        char *if_name;
        struct ether_addr eth_addr;

        struct tpacket_req req;

        struct pkt_rx_queue rx_queue[RTE_PMD_AF_PACKET_MAX_RINGS];
        struct pkt_tx_queue tx_queue[RTE_PMD_AF_PACKET_MAX_RINGS];
};

static const char *valid_arguments[] = {
        ETH_AF_PACKET_IFACE_ARG,
        ETH_AF_PACKET_NUM_Q_ARG,
        ETH_AF_PACKET_BLOCKSIZE_ARG,
        ETH_AF_PACKET_FRAMESIZE_ARG,
        ETH_AF_PACKET_FRAMECOUNT_ARG,
        NULL
};

static struct rte_eth_link pmd_link = {
        .link_speed = ETH_SPEED_NUM_10G,
        .link_duplex = ETH_LINK_FULL_DUPLEX,
        .link_status = ETH_LINK_DOWN,
        .link_autoneg = ETH_LINK_SPEED_AUTONEG
};

static uint16_t
eth_af_packet_rx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
{
        unsigned i;
        struct tpacket2_hdr *ppd;
        struct rte_mbuf *mbuf;
        uint8_t *pbuf;
        struct pkt_rx_queue *pkt_q = queue;
        uint16_t num_rx = 0;
        unsigned long num_rx_bytes = 0;
        unsigned int framecount, framenum;

        if (unlikely(nb_pkts == 0))
                return 0;

        /*
         * Reads the given number of packets from the AF_PACKET socket one by
         * one and copies the packet data into a newly allocated mbuf.
         */
        framecount = pkt_q->framecount;
        framenum = pkt_q->framenum;
        for (i = 0; i < nb_pkts; i++) {
                /* point at the next incoming frame */
                ppd = (struct tpacket2_hdr *) pkt_q->rd[framenum].iov_base;
                if ((ppd->tp_status & TP_STATUS_USER) == 0)
                        break;

                /* allocate the next mbuf */
                mbuf = rte_pktmbuf_alloc(pkt_q->mb_pool);
                if (unlikely(mbuf == NULL))
                        break;

                /* packet will fit in the mbuf, go ahead and receive it */
                rte_pktmbuf_pkt_len(mbuf) = rte_pktmbuf_data_len(mbuf) = ppd->tp_snaplen;
                pbuf = (uint8_t *) ppd + ppd->tp_mac;
                memcpy(rte_pktmbuf_mtod(mbuf, void *), pbuf, rte_pktmbuf_data_len(mbuf));

                /* check for vlan info */
                if (ppd->tp_status & TP_STATUS_VLAN_VALID) {
                        mbuf->vlan_tci = ppd->tp_vlan_tci;
                        mbuf->ol_flags |= (PKT_RX_VLAN_PKT | PKT_RX_VLAN_STRIPPED);
                }

                /* release incoming frame and advance ring buffer */
                ppd->tp_status = TP_STATUS_KERNEL;
                if (++framenum >= framecount)
                        framenum = 0;
                mbuf->port = pkt_q->in_port;

                /* account for the receive frame */
                bufs[i] = mbuf;
                num_rx++;
                num_rx_bytes += mbuf->pkt_len;
        }
        pkt_q->framenum = framenum;
        pkt_q->rx_pkts += num_rx;
        pkt_q->rx_bytes += num_rx_bytes;
        return num_rx;
}

/*
 * Callback to handle sending packets through a real NIC.
 */
static uint16_t
eth_af_packet_tx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
{
        struct tpacket2_hdr *ppd;
        struct rte_mbuf *mbuf;
        uint8_t *pbuf;
        unsigned int framecount, framenum;
        struct pollfd pfd;
        struct pkt_tx_queue *pkt_q = queue;
        uint16_t num_tx = 0;
        unsigned long num_tx_bytes = 0;
        int i;

        if (unlikely(nb_pkts == 0))
                return 0;

        memset(&pfd, 0, sizeof(pfd));
        pfd.fd = pkt_q->sockfd;
        pfd.events = POLLOUT;
        pfd.revents = 0;

        framecount = pkt_q->framecount;
        framenum = pkt_q->framenum;
        ppd = (struct tpacket2_hdr *) pkt_q->rd[framenum].iov_base;
        for (i = 0; i < nb_pkts; i++) {
                mbuf = *bufs++;

                /* drop oversized packets */
                if (rte_pktmbuf_data_len(mbuf) > pkt_q->frame_data_size) {
                        rte_pktmbuf_free(mbuf);
                        continue;
                }

                /* insert vlan info if necessary */
                if (mbuf->ol_flags & PKT_TX_VLAN_PKT) {
                        if (rte_vlan_insert(&mbuf)) {
                                rte_pktmbuf_free(mbuf);
                                continue;
                        }
                }

                /* point at the next incoming frame */
                if ((ppd->tp_status != TP_STATUS_AVAILABLE) &&
                    (poll(&pfd, 1, -1) < 0))
                        break;

                /* copy the tx frame data */
                pbuf = (uint8_t *) ppd + TPACKET2_HDRLEN -
                        sizeof(struct sockaddr_ll);
                memcpy(pbuf, rte_pktmbuf_mtod(mbuf, void*), rte_pktmbuf_data_len(mbuf));
                ppd->tp_len = ppd->tp_snaplen = rte_pktmbuf_data_len(mbuf);

                /* release incoming frame and advance ring buffer */
                ppd->tp_status = TP_STATUS_SEND_REQUEST;
                if (++framenum >= framecount)
                        framenum = 0;
                ppd = (struct tpacket2_hdr *) pkt_q->rd[framenum].iov_base;

                num_tx++;
                num_tx_bytes += mbuf->pkt_len;
                rte_pktmbuf_free(mbuf);
        }

        /* kick-off transmits */
        if (sendto(pkt_q->sockfd, NULL, 0, MSG_DONTWAIT, NULL, 0) == -1)
                num_tx = 0; /* error sending -- no packets transmitted */

        pkt_q->framenum = framenum;
        pkt_q->tx_pkts += num_tx;
        pkt_q->err_pkts += i - num_tx;
        pkt_q->tx_bytes += num_tx_bytes;
        return i;
}

static int
eth_dev_start(struct rte_eth_dev *dev)
{
        dev->data->dev_link.link_status = ETH_LINK_UP;
        return 0;
}

/*
 * This function gets called when the current port gets stopped.
 */
static void
eth_dev_stop(struct rte_eth_dev *dev)
{
        unsigned i;
        int sockfd;
        struct pmd_internals *internals = dev->data->dev_private;

        for (i = 0; i < internals->nb_queues; i++) {
                sockfd = internals->rx_queue[i].sockfd;
                if (sockfd != -1)
                        close(sockfd);

                /* Prevent use after free in case tx fd == rx fd */
                if (sockfd != internals->tx_queue[i].sockfd) {
                        sockfd = internals->tx_queue[i].sockfd;
                        if (sockfd != -1)
                                close(sockfd);
                }

                internals->rx_queue[i].sockfd = -1;
                internals->tx_queue[i].sockfd = -1;
        }

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

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

static void
eth_dev_info(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
{
        struct pmd_internals *internals = dev->data->dev_private;

        dev_info->if_index = internals->if_index;
        dev_info->max_mac_addrs = 1;
        dev_info->max_rx_pktlen = (uint32_t)ETH_FRAME_LEN;
        dev_info->max_rx_queues = (uint16_t)internals->nb_queues;
        dev_info->max_tx_queues = (uint16_t)internals->nb_queues;
        dev_info->min_rx_bufsize = 0;
}

static void
eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *igb_stats)
{
        unsigned i, imax;
        unsigned long rx_total = 0, tx_total = 0, tx_err_total = 0;
        unsigned long rx_bytes_total = 0, tx_bytes_total = 0;
        const struct pmd_internals *internal = dev->data->dev_private;

        imax = (internal->nb_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS ?
                internal->nb_queues : RTE_ETHDEV_QUEUE_STAT_CNTRS);
        for (i = 0; i < imax; i++) {
                igb_stats->q_ipackets[i] = internal->rx_queue[i].rx_pkts;
                igb_stats->q_ibytes[i] = internal->rx_queue[i].rx_bytes;
                rx_total += igb_stats->q_ipackets[i];
                rx_bytes_total += igb_stats->q_ibytes[i];
        }

        imax = (internal->nb_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS ?
                internal->nb_queues : RTE_ETHDEV_QUEUE_STAT_CNTRS);
        for (i = 0; i < imax; i++) {
                igb_stats->q_opackets[i] = internal->tx_queue[i].tx_pkts;
                igb_stats->q_errors[i] = internal->tx_queue[i].err_pkts;
                igb_stats->q_obytes[i] = internal->tx_queue[i].tx_bytes;
                tx_total += igb_stats->q_opackets[i];
                tx_err_total += igb_stats->q_errors[i];
                tx_bytes_total += igb_stats->q_obytes[i];
        }

        igb_stats->ipackets = rx_total;
        igb_stats->ibytes = rx_bytes_total;
        igb_stats->opackets = tx_total;
        igb_stats->oerrors = tx_err_total;
        igb_stats->obytes = tx_bytes_total;
}

static void
eth_stats_reset(struct rte_eth_dev *dev)
{
        unsigned i;
        struct pmd_internals *internal = dev->data->dev_private;

        for (i = 0; i < internal->nb_queues; i++) {
                internal->rx_queue[i].rx_pkts = 0;
                internal->rx_queue[i].rx_bytes = 0;
        }

        for (i = 0; i < internal->nb_queues; i++) {
                internal->tx_queue[i].tx_pkts = 0;
                internal->tx_queue[i].err_pkts = 0;
                internal->tx_queue[i].tx_bytes = 0;
        }
}

static void
eth_dev_close(struct rte_eth_dev *dev __rte_unused)
{
}

static void
eth_queue_release(void *q __rte_unused)
{
}

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

static int
eth_rx_queue_setup(struct rte_eth_dev *dev,
                   uint16_t rx_queue_id,
                   uint16_t nb_rx_desc __rte_unused,
                   unsigned int socket_id __rte_unused,
                   const struct rte_eth_rxconf *rx_conf __rte_unused,
                   struct rte_mempool *mb_pool)
{
        struct pmd_internals *internals = dev->data->dev_private;
        struct pkt_rx_queue *pkt_q = &internals->rx_queue[rx_queue_id];
        unsigned int buf_size, data_size;

        pkt_q->mb_pool = mb_pool;

        /* Now get the space available for data in the mbuf */
        buf_size = rte_pktmbuf_data_room_size(pkt_q->mb_pool) -
                RTE_PKTMBUF_HEADROOM;
        data_size = internals->req.tp_frame_size;
        data_size -= TPACKET2_HDRLEN - sizeof(struct sockaddr_ll);

        if (data_size > buf_size) {
                RTE_LOG(ERR, PMD,
                        "%s: %d bytes will not fit in mbuf (%d bytes)\n",
                        dev->data->name, data_size, buf_size);
                return -ENOMEM;
        }

        dev->data->rx_queues[rx_queue_id] = pkt_q;
        pkt_q->in_port = dev->data->port_id;

        return 0;
}

static int
eth_tx_queue_setup(struct rte_eth_dev *dev,
                   uint16_t tx_queue_id,
                   uint16_t nb_tx_desc __rte_unused,
                   unsigned int socket_id __rte_unused,
                   const struct rte_eth_txconf *tx_conf __rte_unused)
{

        struct pmd_internals *internals = dev->data->dev_private;

        dev->data->tx_queues[tx_queue_id] = &internals->tx_queue[tx_queue_id];
        return 0;
}

static int
eth_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
{
        struct pmd_internals *internals = dev->data->dev_private;
        struct ifreq ifr = { .ifr_mtu = mtu };
        int ret;
        int s;
        unsigned int data_size = internals->req.tp_frame_size -
                                 TPACKET2_HDRLEN -
                                 sizeof(struct sockaddr_ll);

        if (mtu > data_size)
                return -EINVAL;

        s = socket(PF_INET, SOCK_DGRAM, 0);
        if (s < 0)
                return -EINVAL;

        snprintf(ifr.ifr_name, IFNAMSIZ, "%s", internals->if_name);
        ret = ioctl(s, SIOCSIFMTU, &ifr);
        close(s);

        if (ret < 0)
                return -EINVAL;

        return 0;
}

static void
eth_dev_change_flags(char *if_name, uint32_t flags, uint32_t mask)
{
        struct ifreq ifr;
        int s;

        s = socket(PF_INET, SOCK_DGRAM, 0);
        if (s < 0)
                return;

        snprintf(ifr.ifr_name, IFNAMSIZ, "%s", if_name);
        if (ioctl(s, SIOCGIFFLAGS, &ifr) < 0)
                goto out;
        ifr.ifr_flags &= mask;
        ifr.ifr_flags |= flags;
        if (ioctl(s, SIOCSIFFLAGS, &ifr) < 0)
                goto out;
out:
        close(s);
}

static void
eth_dev_promiscuous_enable(struct rte_eth_dev *dev)
{
        struct pmd_internals *internals = dev->data->dev_private;

        eth_dev_change_flags(internals->if_name, IFF_PROMISC, ~0);
}

static void
eth_dev_promiscuous_disable(struct rte_eth_dev *dev)
{
        struct pmd_internals *internals = dev->data->dev_private;

        eth_dev_change_flags(internals->if_name, 0, ~IFF_PROMISC);
}

static const struct eth_dev_ops ops = {
        .dev_start = eth_dev_start,
        .dev_stop = eth_dev_stop,
        .dev_close = eth_dev_close,
        .dev_configure = eth_dev_configure,
        .dev_infos_get = eth_dev_info,
        .mtu_set = eth_dev_mtu_set,
        .promiscuous_enable = eth_dev_promiscuous_enable,
        .promiscuous_disable = eth_dev_promiscuous_disable,
        .rx_queue_setup = eth_rx_queue_setup,
        .tx_queue_setup = eth_tx_queue_setup,
        .rx_queue_release = eth_queue_release,
        .tx_queue_release = eth_queue_release,
        .link_update = eth_link_update,
        .stats_get = eth_stats_get,
        .stats_reset = eth_stats_reset,
};

/*
 * Opens an AF_PACKET socket
 */
static int
open_packet_iface(const char *key __rte_unused,
                  const char *value __rte_unused,
                  void *extra_args)
{
        int *sockfd = extra_args;

        /* Open an AF_PACKET socket... */
        *sockfd = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
        if (*sockfd == -1) {
                RTE_LOG(ERR, PMD, "Could not open AF_PACKET socket\n");
                return -1;
        }

        return 0;
}

static struct rte_vdev_driver pmd_af_packet_drv;

static int
rte_pmd_init_internals(struct rte_vdev_device *dev,
                       const int sockfd,
                       const unsigned nb_queues,
                       unsigned int blocksize,
                       unsigned int blockcnt,
                       unsigned int framesize,
                       unsigned int framecnt,
                       struct pmd_internals **internals,
                       struct rte_eth_dev **eth_dev,
                       struct rte_kvargs *kvlist)
{
        const char *name = rte_vdev_device_name(dev);
        const unsigned int numa_node = dev->device.numa_node;
        struct rte_eth_dev_data *data = NULL;
        struct rte_kvargs_pair *pair = NULL;
        struct ifreq ifr;
        size_t ifnamelen;
        unsigned k_idx;
        struct sockaddr_ll sockaddr;
        struct tpacket_req *req;
        struct pkt_rx_queue *rx_queue;
        struct pkt_tx_queue *tx_queue;
        int rc, tpver, discard;
        int qsockfd = -1;
        unsigned int i, q, rdsize;
        int fanout_arg __rte_unused, bypass __rte_unused;

        for (k_idx = 0; k_idx < kvlist->count; k_idx++) {
                pair = &kvlist->pairs[k_idx];
                if (strstr(pair->key, ETH_AF_PACKET_IFACE_ARG) != NULL)
                        break;
        }
        if (pair == NULL) {
                RTE_LOG(ERR, PMD,
                        "%s: no interface specified for AF_PACKET ethdev\n",
                        name);
                goto error_early;
        }

        RTE_LOG(INFO, PMD,
                "%s: creating AF_PACKET-backed ethdev on numa socket %u\n",
                name, numa_node);

        /*
         * now do all data allocation - for eth_dev structure, dummy pci driver
         * and internal (private) data
         */
        data = rte_zmalloc_socket(name, sizeof(*data), 0, numa_node);
        if (data == NULL)
                goto error_early;

        *internals = rte_zmalloc_socket(name, sizeof(**internals),
                                        0, numa_node);
        if (*internals == NULL)
                goto error_early;

        for (q = 0; q < nb_queues; q++) {
                (*internals)->rx_queue[q].map = MAP_FAILED;
                (*internals)->tx_queue[q].map = MAP_FAILED;
        }

        req = &((*internals)->req);

        req->tp_block_size = blocksize;
        req->tp_block_nr = blockcnt;
        req->tp_frame_size = framesize;
        req->tp_frame_nr = framecnt;

        ifnamelen = strlen(pair->value);
        if (ifnamelen < sizeof(ifr.ifr_name)) {
                memcpy(ifr.ifr_name, pair->value, ifnamelen);
                ifr.ifr_name[ifnamelen] = '\0';
        } else {
                RTE_LOG(ERR, PMD,
                        "%s: I/F name too long (%s)\n",
                        name, pair->value);
                goto error_early;
        }
        if (ioctl(sockfd, SIOCGIFINDEX, &ifr) == -1) {
                RTE_LOG(ERR, PMD,
                        "%s: ioctl failed (SIOCGIFINDEX)\n",
                        name);
                goto error_early;
        }
        (*internals)->if_name = strdup(pair->value);
        (*internals)->if_index = ifr.ifr_ifindex;

        if (ioctl(sockfd, SIOCGIFHWADDR, &ifr) == -1) {
                RTE_LOG(ERR, PMD,
                        "%s: ioctl failed (SIOCGIFHWADDR)\n",
                        name);
                goto error_early;
        }
        memcpy(&(*internals)->eth_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);

        memset(&sockaddr, 0, sizeof(sockaddr));
        sockaddr.sll_family = AF_PACKET;
        sockaddr.sll_protocol = htons(ETH_P_ALL);
        sockaddr.sll_ifindex = (*internals)->if_index;

#if defined(PACKET_FANOUT)
        fanout_arg = (getpid() ^ (*internals)->if_index) & 0xffff;
        fanout_arg |= (PACKET_FANOUT_HASH | PACKET_FANOUT_FLAG_DEFRAG) << 16;
#if defined(PACKET_FANOUT_FLAG_ROLLOVER)
        fanout_arg |= PACKET_FANOUT_FLAG_ROLLOVER << 16;
#endif
#endif

        for (q = 0; q < nb_queues; q++) {
                /* Open an AF_PACKET socket for this queue... */
                qsockfd = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
                if (qsockfd == -1) {
                        RTE_LOG(ERR, PMD,
                                "%s: could not open AF_PACKET socket\n",
                                name);
                        return -1;
                }

                tpver = TPACKET_V2;
                rc = setsockopt(qsockfd, SOL_PACKET, PACKET_VERSION,
                                &tpver, sizeof(tpver));
                if (rc == -1) {
                        RTE_LOG(ERR, PMD,
                                "%s: could not set PACKET_VERSION on AF_PACKET "
                                "socket for %s\n", name, pair->value);
                        goto error;
                }

                discard = 1;
                rc = setsockopt(qsockfd, SOL_PACKET, PACKET_LOSS,
                                &discard, sizeof(discard));
                if (rc == -1) {
                        RTE_LOG(ERR, PMD,
                                "%s: could not set PACKET_LOSS on "
                                "AF_PACKET socket for %s\n", name, pair->value);
                        goto error;
                }

#if defined(PACKET_QDISC_BYPASS)
                bypass = 1;
                rc = setsockopt(qsockfd, SOL_PACKET, PACKET_QDISC_BYPASS,
                                &bypass, sizeof(bypass));
                if (rc == -1) {
                        RTE_LOG(ERR, PMD,
                                "%s: could not set PACKET_QDISC_BYPASS "
                                "on AF_PACKET socket for %s\n", name,
                                pair->value);
                        goto error;
                }
#endif

                rc = setsockopt(qsockfd, SOL_PACKET, PACKET_RX_RING, req, sizeof(*req));
                if (rc == -1) {
                        RTE_LOG(ERR, PMD,
                                "%s: could not set PACKET_RX_RING on AF_PACKET "
                                "socket for %s\n", name, pair->value);
                        goto error;
                }

                rc = setsockopt(qsockfd, SOL_PACKET, PACKET_TX_RING, req, sizeof(*req));
                if (rc == -1) {
                        RTE_LOG(ERR, PMD,
                                "%s: could not set PACKET_TX_RING on AF_PACKET "
                                "socket for %s\n", name, pair->value);
                        goto error;
                }

                rx_queue = &((*internals)->rx_queue[q]);
                rx_queue->framecount = req->tp_frame_nr;

                rx_queue->map = mmap(NULL, 2 * req->tp_block_size * req->tp_block_nr,
                                    PROT_READ | PROT_WRITE, MAP_SHARED | MAP_LOCKED,
                                    qsockfd, 0);
                if (rx_queue->map == MAP_FAILED) {
                        RTE_LOG(ERR, PMD,
                                "%s: call to mmap failed on AF_PACKET socket for %s\n",
                                name, pair->value);
                        goto error;
                }

                /* rdsize is same for both Tx and Rx */
                rdsize = req->tp_frame_nr * sizeof(*(rx_queue->rd));

                rx_queue->rd = rte_zmalloc_socket(name, rdsize, 0, numa_node);
                if (rx_queue->rd == NULL)
                        goto error;
                for (i = 0; i < req->tp_frame_nr; ++i) {
                        rx_queue->rd[i].iov_base = rx_queue->map + (i * framesize);
                        rx_queue->rd[i].iov_len = req->tp_frame_size;
                }
                rx_queue->sockfd = qsockfd;

                tx_queue = &((*internals)->tx_queue[q]);
                tx_queue->framecount = req->tp_frame_nr;
                tx_queue->frame_data_size = req->tp_frame_size;
                tx_queue->frame_data_size -= TPACKET2_HDRLEN -
                        sizeof(struct sockaddr_ll);

                tx_queue->map = rx_queue->map + req->tp_block_size * req->tp_block_nr;

                tx_queue->rd = rte_zmalloc_socket(name, rdsize, 0, numa_node);
                if (tx_queue->rd == NULL)
                        goto error;
                for (i = 0; i < req->tp_frame_nr; ++i) {
                        tx_queue->rd[i].iov_base = tx_queue->map + (i * framesize);
                        tx_queue->rd[i].iov_len = req->tp_frame_size;
                }
                tx_queue->sockfd = qsockfd;

                rc = bind(qsockfd, (const struct sockaddr*)&sockaddr, sizeof(sockaddr));
                if (rc == -1) {
                        RTE_LOG(ERR, PMD,
                                "%s: could not bind AF_PACKET socket to %s\n",
                                name, pair->value);
                        goto error;
                }

#if defined(PACKET_FANOUT)
                rc = setsockopt(qsockfd, SOL_PACKET, PACKET_FANOUT,
                                &fanout_arg, sizeof(fanout_arg));
                if (rc == -1) {
                        RTE_LOG(ERR, PMD,
                                "%s: could not set PACKET_FANOUT on AF_PACKET socket "
                                "for %s\n", name, pair->value);
                        goto error;
                }
#endif
        }

        /* reserve an ethdev entry */
        *eth_dev = rte_eth_vdev_allocate(dev, 0);
        if (*eth_dev == NULL)
                goto error;

        /*
         * now put it all together
         * - store queue data in internals,
         * - store numa_node in eth_dev
         * - point eth_dev_data to internals
         * - and point eth_dev structure to new eth_dev_data structure
         */

        (*internals)->nb_queues = nb_queues;

        rte_memcpy(data, (*eth_dev)->data, sizeof(*data));
        data->dev_private = *internals;
        data->nb_rx_queues = (uint16_t)nb_queues;
        data->nb_tx_queues = (uint16_t)nb_queues;
        data->dev_link = pmd_link;
        data->mac_addrs = &(*internals)->eth_addr;

        (*eth_dev)->data = data;
        (*eth_dev)->dev_ops = &ops;
        (*eth_dev)->data->dev_flags = RTE_ETH_DEV_DETACHABLE;

        return 0;

error:
        if (qsockfd != -1)
                close(qsockfd);
        for (q = 0; q < nb_queues; q++) {
                munmap((*internals)->rx_queue[q].map,
                       2 * req->tp_block_size * req->tp_block_nr);

                rte_free((*internals)->rx_queue[q].rd);
                rte_free((*internals)->tx_queue[q].rd);
                if (((*internals)->rx_queue[q].sockfd != 0) &&
                        ((*internals)->rx_queue[q].sockfd != qsockfd))
                        close((*internals)->rx_queue[q].sockfd);
        }
        free((*internals)->if_name);
        rte_free(*internals);
error_early:
        rte_free(data);
        return -1;
}

static int
rte_eth_from_packet(struct rte_vdev_device *dev,
                    int const *sockfd,
                    struct rte_kvargs *kvlist)
{
        const char *name = rte_vdev_device_name(dev);
        struct pmd_internals *internals = NULL;
        struct rte_eth_dev *eth_dev = NULL;
        struct rte_kvargs_pair *pair = NULL;
        unsigned k_idx;
        unsigned int blockcount;
        unsigned int blocksize = DFLT_BLOCK_SIZE;
        unsigned int framesize = DFLT_FRAME_SIZE;
        unsigned int framecount = DFLT_FRAME_COUNT;
        unsigned int qpairs = 1;

        /* do some parameter checking */
        if (*sockfd < 0)
                return -1;

        /*
         * Walk arguments for configurable settings
         */
        for (k_idx = 0; k_idx < kvlist->count; k_idx++) {
                pair = &kvlist->pairs[k_idx];
                if (strstr(pair->key, ETH_AF_PACKET_NUM_Q_ARG) != NULL) {
                        qpairs = atoi(pair->value);
                        if (qpairs < 1 ||
                            qpairs > RTE_PMD_AF_PACKET_MAX_RINGS) {
                                RTE_LOG(ERR, PMD,
                                        "%s: invalid qpairs value\n",
                                        name);
                                return -1;
                        }
                        continue;
                }
                if (strstr(pair->key, ETH_AF_PACKET_BLOCKSIZE_ARG) != NULL) {
                        blocksize = atoi(pair->value);
                        if (!blocksize) {
                                RTE_LOG(ERR, PMD,
                                        "%s: invalid blocksize value\n",
                                        name);
                                return -1;
                        }
                        continue;
                }
                if (strstr(pair->key, ETH_AF_PACKET_FRAMESIZE_ARG) != NULL) {
                        framesize = atoi(pair->value);
                        if (!framesize) {
                                RTE_LOG(ERR, PMD,
                                        "%s: invalid framesize value\n",
                                        name);
                                return -1;
                        }
                        continue;
                }
                if (strstr(pair->key, ETH_AF_PACKET_FRAMECOUNT_ARG) != NULL) {
                        framecount = atoi(pair->value);
                        if (!framecount) {
                                RTE_LOG(ERR, PMD,
                                        "%s: invalid framecount value\n",
                                        name);
                                return -1;
                        }
                        continue;
                }
        }

        if (framesize > blocksize) {
                RTE_LOG(ERR, PMD,
                        "%s: AF_PACKET MMAP frame size exceeds block size!\n",
                        name);
                return -1;
        }

        blockcount = framecount / (blocksize / framesize);
        if (!blockcount) {
                RTE_LOG(ERR, PMD,
                        "%s: invalid AF_PACKET MMAP parameters\n", name);
                return -1;
        }

        RTE_LOG(INFO, PMD, "%s: AF_PACKET MMAP parameters:\n", name);
        RTE_LOG(INFO, PMD, "%s:\tblock size %d\n", name, blocksize);
        RTE_LOG(INFO, PMD, "%s:\tblock count %d\n", name, blockcount);
        RTE_LOG(INFO, PMD, "%s:\tframe size %d\n", name, framesize);
        RTE_LOG(INFO, PMD, "%s:\tframe count %d\n", name, framecount);

        if (rte_pmd_init_internals(dev, *sockfd, qpairs,
                                   blocksize, blockcount,
                                   framesize, framecount,
                                   &internals, &eth_dev,
                                   kvlist) < 0)
                return -1;

        eth_dev->rx_pkt_burst = eth_af_packet_rx;
        eth_dev->tx_pkt_burst = eth_af_packet_tx;

        return 0;
}

static int
rte_pmd_af_packet_probe(struct rte_vdev_device *dev)
{
        int ret = 0;
        struct rte_kvargs *kvlist;
        int sockfd = -1;

        RTE_LOG(INFO, PMD, "Initializing pmd_af_packet for %s\n",
                rte_vdev_device_name(dev));

        kvlist = rte_kvargs_parse(rte_vdev_device_args(dev), valid_arguments);
        if (kvlist == NULL) {
                ret = -1;
                goto exit;
        }

        /*
         * If iface argument is passed we open the NICs and use them for
         * reading / writing
         */
        if (rte_kvargs_count(kvlist, ETH_AF_PACKET_IFACE_ARG) == 1) {

                ret = rte_kvargs_process(kvlist, ETH_AF_PACKET_IFACE_ARG,
                                         &open_packet_iface, &sockfd);
                if (ret < 0)
                        goto exit;
        }

        if (dev->device.numa_node == SOCKET_ID_ANY)
                dev->device.numa_node = rte_socket_id();

        ret = rte_eth_from_packet(dev, &sockfd, kvlist);
        close(sockfd); /* no longer needed */

exit:
        rte_kvargs_free(kvlist);
        return ret;
}

static int
rte_pmd_af_packet_remove(struct rte_vdev_device *dev)
{
        struct rte_eth_dev *eth_dev = NULL;
        struct pmd_internals *internals;
        unsigned q;

        RTE_LOG(INFO, PMD, "Closing AF_PACKET ethdev on numa socket %u\n",
                        rte_socket_id());

        if (dev == NULL)
                return -1;

        /* find the ethdev entry */
        eth_dev = rte_eth_dev_allocated(rte_vdev_device_name(dev));
        if (eth_dev == NULL)
                return -1;

        internals = eth_dev->data->dev_private;
        for (q = 0; q < internals->nb_queues; q++) {
                rte_free(internals->rx_queue[q].rd);
                rte_free(internals->tx_queue[q].rd);
        }
        free(internals->if_name);

        rte_free(eth_dev->data->dev_private);
        rte_free(eth_dev->data);

        rte_eth_dev_release_port(eth_dev);

        return 0;
}

static struct rte_vdev_driver pmd_af_packet_drv = {
        .probe = rte_pmd_af_packet_probe,
        .remove = rte_pmd_af_packet_remove,
};

RTE_PMD_REGISTER_VDEV(net_af_packet, pmd_af_packet_drv);
RTE_PMD_REGISTER_ALIAS(net_af_packet, eth_af_packet);
RTE_PMD_REGISTER_PARAM_STRING(net_af_packet,
        "iface=<string> "
        "qpairs=<int> "
        "blocksz=<int> "
        "framesz=<int> "
        "framecnt=<int>");