init.c

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/*
 * Copyright (c) 2015 Cisco and/or its affiliates.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#include <vnet/vnet.h>
#include <vppinfra/vec.h>
#include <vppinfra/error.h>
#include <vppinfra/format.h>
#include <vppinfra/bitmap.h>
#include <vppinfra/linux/sysfs.h>
#include <vlib/unix/unix.h>
#include <vlib/log.h>

#include <vnet/ethernet/ethernet.h>
#include <dpdk/buffer.h>
#include <dpdk/device/dpdk.h>
#include <vlib/pci/pci.h>
#include <vlib/vmbus/vmbus.h>

#include <rte_ring.h>

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/mount.h>
#include <string.h>
#include <fcntl.h>
#include <dirent.h>

#include <dpdk/device/dpdk_priv.h>

#define ETHER_MAX_LEN   1518  /**< Maximum frame len, including CRC. */

dpdk_main_t dpdk_main;
dpdk_config_main_t dpdk_config_main;

#define LINK_STATE_ELOGS        0

/* Port configuration, mildly modified Intel app values */

static dpdk_port_type_t
port_type_from_speed_capa (struct rte_eth_dev_info *dev_info)
{

  if (dev_info->speed_capa & ETH_LINK_SPEED_100G)
    return VNET_DPDK_PORT_TYPE_ETH_100G;
  else if (dev_info->speed_capa & ETH_LINK_SPEED_56G)
    return VNET_DPDK_PORT_TYPE_ETH_56G;
  else if (dev_info->speed_capa & ETH_LINK_SPEED_50G)
    return VNET_DPDK_PORT_TYPE_ETH_50G;
  else if (dev_info->speed_capa & ETH_LINK_SPEED_40G)
    return VNET_DPDK_PORT_TYPE_ETH_40G;
  else if (dev_info->speed_capa & ETH_LINK_SPEED_25G)
    return VNET_DPDK_PORT_TYPE_ETH_25G;
  else if (dev_info->speed_capa & ETH_LINK_SPEED_20G)
    return VNET_DPDK_PORT_TYPE_ETH_20G;
  else if (dev_info->speed_capa & ETH_LINK_SPEED_10G)
    return VNET_DPDK_PORT_TYPE_ETH_10G;
  else if (dev_info->speed_capa & ETH_LINK_SPEED_5G)
    return VNET_DPDK_PORT_TYPE_ETH_5G;
  else if (dev_info->speed_capa & ETH_LINK_SPEED_2_5G)
    return VNET_DPDK_PORT_TYPE_ETH_2_5G;
  else if (dev_info->speed_capa & ETH_LINK_SPEED_1G)
    return VNET_DPDK_PORT_TYPE_ETH_1G;

  return VNET_DPDK_PORT_TYPE_UNKNOWN;
}

static dpdk_port_type_t
port_type_from_link_speed (u32 link_speed)
{
  switch (link_speed)
    {
    case ETH_SPEED_NUM_1G:
      return VNET_DPDK_PORT_TYPE_ETH_1G;
    case ETH_SPEED_NUM_2_5G:
      return VNET_DPDK_PORT_TYPE_ETH_2_5G;
    case ETH_SPEED_NUM_5G:
      return VNET_DPDK_PORT_TYPE_ETH_5G;
    case ETH_SPEED_NUM_10G:
      return VNET_DPDK_PORT_TYPE_ETH_10G;
    case ETH_SPEED_NUM_20G:
      return VNET_DPDK_PORT_TYPE_ETH_20G;
    case ETH_SPEED_NUM_25G:
      return VNET_DPDK_PORT_TYPE_ETH_25G;
    case ETH_SPEED_NUM_40G:
      return VNET_DPDK_PORT_TYPE_ETH_40G;
    case ETH_SPEED_NUM_50G:
      return VNET_DPDK_PORT_TYPE_ETH_50G;
    case ETH_SPEED_NUM_56G:
      return VNET_DPDK_PORT_TYPE_ETH_56G;
    case ETH_SPEED_NUM_100G:
      return VNET_DPDK_PORT_TYPE_ETH_100G;
    default:
      return VNET_DPDK_PORT_TYPE_UNKNOWN;
    }
}

static u32
dpdk_flag_change (vnet_main_t * vnm, vnet_hw_interface_t * hi, u32 flags)
{
  dpdk_main_t *dm = &dpdk_main;
  dpdk_device_t *xd = vec_elt_at_index (dm->devices, hi->dev_instance);
  u32 old = 0;

  if (ETHERNET_INTERFACE_FLAG_CONFIG_PROMISC (flags))
    {
      old = (xd->flags & DPDK_DEVICE_FLAG_PROMISC) != 0;

      if (flags & ETHERNET_INTERFACE_FLAG_ACCEPT_ALL)
        xd->flags |= DPDK_DEVICE_FLAG_PROMISC;
      else
        xd->flags &= ~DPDK_DEVICE_FLAG_PROMISC;

      if (xd->flags & DPDK_DEVICE_FLAG_ADMIN_UP)
        {
          if (xd->flags & DPDK_DEVICE_FLAG_PROMISC)
            rte_eth_promiscuous_enable (xd->port_id);
          else
            rte_eth_promiscuous_disable (xd->port_id);
        }
    }
  else if (ETHERNET_INTERFACE_FLAG_CONFIG_MTU (flags))
    {
      xd->port_conf.rxmode.max_rx_pkt_len = hi->max_packet_bytes;
      dpdk_device_setup (xd);
    }
  return old;
}

static void
dpdk_device_lock_init (dpdk_device_t * xd)
{
  int q;
  vec_validate (xd->lockp, xd->tx_q_used - 1);
  for (q = 0; q < xd->tx_q_used; q++)
    {
      xd->lockp[q] = clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES,
                                             CLIB_CACHE_LINE_BYTES);
      clib_memset ((void *) xd->lockp[q], 0, CLIB_CACHE_LINE_BYTES);
    }
}

static int
dpdk_port_crc_strip_enabled (dpdk_device_t * xd)
{
  return !(xd->port_conf.rxmode.offloads & DEV_RX_OFFLOAD_KEEP_CRC);
}

/* The function check_l3cache helps check if Level 3 cache exists or not on current CPUs
  return value 1: exist.
  return value 0: not exist.
*/
static int
check_l3cache ()
{

  struct dirent *dp;
  clib_error_t *err;
  const char *sys_cache_dir = "/sys/devices/system/cpu/cpu0/cache";
  DIR *dir_cache = opendir (sys_cache_dir);

  if (dir_cache == NULL)
    return -1;

  while ((dp = readdir (dir_cache)) != NULL)
    {
      if (dp->d_type == DT_DIR)
        {
          u8 *p = NULL;
          int level_cache = -1;

          p = format (p, "%s/%s/%s%c", sys_cache_dir, dp->d_name, "level", 0);
          if ((err = clib_sysfs_read ((char *) p, "%d", &level_cache)))
            clib_error_free (err);

          if (level_cache == 3)
            {
              closedir (dir_cache);
              return 1;
            }
        }
    }

  if (dir_cache != NULL)
    closedir (dir_cache);

  return 0;
}

static void
dpdk_enable_l4_csum_offload (dpdk_device_t * xd)
{
  xd->port_conf.txmode.offloads |= DEV_TX_OFFLOAD_TCP_CKSUM;
  xd->port_conf.txmode.offloads |= DEV_TX_OFFLOAD_UDP_CKSUM;
  xd->flags |= DPDK_DEVICE_FLAG_TX_OFFLOAD |
    DPDK_DEVICE_FLAG_INTEL_PHDR_CKSUM;
}

static clib_error_t *
dpdk_lib_init (dpdk_main_t * dm)
{
  u32 nports;
  u32 mtu, max_rx_frame;
  int i;
  clib_error_t *error;
  vlib_main_t *vm = vlib_get_main ();
  vnet_main_t *vnm = vnet_get_main ();
  vlib_thread_main_t *tm = vlib_get_thread_main ();
  vnet_device_main_t *vdm = &vnet_device_main;
  vnet_sw_interface_t *sw;
  vnet_hw_interface_t *hi;
  dpdk_device_t *xd;
  vlib_pci_addr_t last_pci_addr;
  u32 last_pci_addr_port = 0;
  vlib_thread_registration_t *tr_hqos;
  uword *p_hqos;

  u32 next_hqos_cpu = 0;
  u8 af_packet_instance_num = 0;
  last_pci_addr.as_u32 = ~0;

  dm->hqos_cpu_first_index = 0;
  dm->hqos_cpu_count = 0;

  /* find out which cpus will be used for I/O TX */
  p_hqos = hash_get_mem (tm->thread_registrations_by_name, "hqos-threads");
  tr_hqos = p_hqos ? (vlib_thread_registration_t *) p_hqos[0] : 0;

  if (tr_hqos && tr_hqos->count > 0)
    {
      dm->hqos_cpu_first_index = tr_hqos->first_index;
      dm->hqos_cpu_count = tr_hqos->count;
    }

  vec_validate_aligned (dm->devices_by_hqos_cpu, tm->n_vlib_mains - 1,
                        CLIB_CACHE_LINE_BYTES);

  nports = rte_eth_dev_count_avail ();

  if (nports < 1)
    {
      dpdk_log_notice ("DPDK drivers found no Ethernet devices...");
    }

  if (CLIB_DEBUG > 0)
    dpdk_log_notice ("DPDK drivers found %d ports...", nports);

  if (dm->conf->enable_tcp_udp_checksum)
    dm->buffer_flags_template &= ~(VNET_BUFFER_F_L4_CHECKSUM_CORRECT
                                   | VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);

  /* vlib_buffer_t template */
  vec_validate_aligned (dm->per_thread_data, tm->n_vlib_mains - 1,
                        CLIB_CACHE_LINE_BYTES);
  for (i = 0; i < tm->n_vlib_mains; i++)
    {
      dpdk_per_thread_data_t *ptd = vec_elt_at_index (dm->per_thread_data, i);
      clib_memset (&ptd->buffer_template, 0, sizeof (vlib_buffer_t));
      ptd->buffer_template.flags = dm->buffer_flags_template;
      vnet_buffer (&ptd->buffer_template)->sw_if_index[VLIB_TX] = (u32) ~ 0;
    }

  /* *INDENT-OFF* */
  RTE_ETH_FOREACH_DEV(i)
    {
      u8 addr[6];
      int vlan_off;
      struct rte_eth_dev_info dev_info;
      struct rte_pci_device *pci_dev;
      dpdk_portid_t next_port_id;
      dpdk_device_config_t *devconf = 0;
      vlib_pci_addr_t pci_addr;
      uword *p = 0;

      if (!rte_eth_dev_is_valid_port(i))
        continue;

      rte_eth_dev_info_get (i, &dev_info);

      if (dev_info.device == 0)
        {
          dpdk_log_notice ("DPDK bug: missing device info. Skipping %s device",
                        dev_info.driver_name);
          continue;
        }

      pci_dev = dpdk_get_pci_device (&dev_info);

      if (pci_dev)
        {
          pci_addr.domain = pci_dev->addr.domain;
          pci_addr.bus = pci_dev->addr.bus;
          pci_addr.slot = pci_dev->addr.devid;
          pci_addr.function = pci_dev->addr.function;
          p = hash_get (dm->conf->device_config_index_by_pci_addr,
                        pci_addr.as_u32);
        }


      /* Create vnet interface */
      vec_add2_aligned (dm->devices, xd, 1, CLIB_CACHE_LINE_BYTES);
      xd->nb_rx_desc = DPDK_NB_RX_DESC_DEFAULT;
      xd->nb_tx_desc = DPDK_NB_TX_DESC_DEFAULT;
      xd->cpu_socket = (i8) rte_eth_dev_socket_id (i);

      if (p)
        {
          devconf = pool_elt_at_index (dm->conf->dev_confs, p[0]);
          xd->name = devconf->name;
        }
      else
        devconf = &dm->conf->default_devconf;

      /* Handle interface naming for devices with multiple ports sharing same PCI ID */
      if (pci_dev &&
          ((next_port_id = rte_eth_find_next (i + 1)) != RTE_MAX_ETHPORTS))
        {
          struct rte_eth_dev_info di = { 0 };
          struct rte_pci_device *next_pci_dev;
          rte_eth_dev_info_get (next_port_id, &di);
          next_pci_dev = di.device ? RTE_DEV_TO_PCI (di.device) : 0;
          if (next_pci_dev &&
              pci_addr.as_u32 != last_pci_addr.as_u32 &&
              memcmp (&pci_dev->addr, &next_pci_dev->addr,
                      sizeof (struct rte_pci_addr)) == 0)
            {
              xd->interface_name_suffix = format (0, "0");
              last_pci_addr.as_u32 = pci_addr.as_u32;
              last_pci_addr_port = i;
            }
          else if (pci_addr.as_u32 == last_pci_addr.as_u32)
            {
              xd->interface_name_suffix =
                format (0, "%u", i - last_pci_addr_port);
            }
          else
            {
              last_pci_addr.as_u32 = ~0;
            }
        }
      else
        last_pci_addr.as_u32 = ~0;

      clib_memcpy (&xd->tx_conf, &dev_info.default_txconf,
                   sizeof (struct rte_eth_txconf));

      if (dev_info.rx_offload_capa & DEV_RX_OFFLOAD_IPV4_CKSUM)
        {
          xd->port_conf.rxmode.offloads |= DEV_RX_OFFLOAD_IPV4_CKSUM;
          xd->flags |= DPDK_DEVICE_FLAG_RX_IP4_CKSUM;
        }

      if (dm->conf->no_multi_seg)
        {
          xd->port_conf.txmode.offloads &= ~DEV_TX_OFFLOAD_MULTI_SEGS;
          xd->port_conf.rxmode.offloads &= ~DEV_RX_OFFLOAD_JUMBO_FRAME;
          xd->port_conf.rxmode.offloads &= ~DEV_RX_OFFLOAD_SCATTER;
        }
      else
        {
          xd->port_conf.txmode.offloads |= DEV_TX_OFFLOAD_MULTI_SEGS;
          xd->port_conf.rxmode.offloads |= DEV_RX_OFFLOAD_JUMBO_FRAME;
          xd->port_conf.rxmode.offloads |= DEV_RX_OFFLOAD_SCATTER;
          xd->flags |= DPDK_DEVICE_FLAG_MAYBE_MULTISEG;
        }

      xd->tx_q_used = clib_min (dev_info.max_tx_queues, tm->n_vlib_mains);

      if (devconf->num_tx_queues > 0
          && devconf->num_tx_queues < xd->tx_q_used)
        xd->tx_q_used = clib_min (xd->tx_q_used, devconf->num_tx_queues);

      if (devconf->num_rx_queues > 1
          && dev_info.max_rx_queues >= devconf->num_rx_queues)
        {
          xd->rx_q_used = devconf->num_rx_queues;
          xd->port_conf.rxmode.mq_mode = ETH_MQ_RX_RSS;
          if (devconf->rss_fn == 0)
            xd->port_conf.rx_adv_conf.rss_conf.rss_hf =
              ETH_RSS_IP | ETH_RSS_UDP | ETH_RSS_TCP;
          else
            {
              u64 unsupported_bits;
              xd->port_conf.rx_adv_conf.rss_conf.rss_hf = devconf->rss_fn;
              unsupported_bits = xd->port_conf.rx_adv_conf.rss_conf.rss_hf;
              unsupported_bits &= ~dev_info.flow_type_rss_offloads;
              if (unsupported_bits)
                dpdk_log_warn ("Unsupported RSS hash functions: %U",
                               format_dpdk_rss_hf_name, unsupported_bits);
            }
          xd->port_conf.rx_adv_conf.rss_conf.rss_hf &=
            dev_info.flow_type_rss_offloads;
        }
      else
        xd->rx_q_used = 1;

      xd->flags |= DPDK_DEVICE_FLAG_PMD;

      /* workaround for drivers not setting driver_name */
      if ((!dev_info.driver_name) && (pci_dev))
        dev_info.driver_name = pci_dev->driver->driver.name;

      ASSERT (dev_info.driver_name);

      if (!xd->pmd)
        {


#define _(s,f) else if (dev_info.driver_name &&                 \
                        !strcmp(dev_info.driver_name, s))       \
                 xd->pmd = VNET_DPDK_PMD_##f;
          if (0)
            ;
          foreach_dpdk_pmd
#undef _
            else
            xd->pmd = VNET_DPDK_PMD_UNKNOWN;

          xd->port_type = VNET_DPDK_PORT_TYPE_UNKNOWN;
          xd->nb_rx_desc = DPDK_NB_RX_DESC_DEFAULT;
          xd->nb_tx_desc = DPDK_NB_TX_DESC_DEFAULT;

          switch (xd->pmd)
            {
              /* Drivers with valid speed_capa set */
            case VNET_DPDK_PMD_E1000EM:
            case VNET_DPDK_PMD_IGB:
            case VNET_DPDK_PMD_IXGBE:
            case VNET_DPDK_PMD_I40E:
            case VNET_DPDK_PMD_ICE:
              xd->port_type = port_type_from_speed_capa (&dev_info);
              xd->supported_flow_actions = VNET_FLOW_ACTION_MARK |
                VNET_FLOW_ACTION_REDIRECT_TO_NODE |
                VNET_FLOW_ACTION_REDIRECT_TO_QUEUE |
                VNET_FLOW_ACTION_BUFFER_ADVANCE |
                VNET_FLOW_ACTION_COUNT | VNET_FLOW_ACTION_DROP;

              if (dm->conf->no_tx_checksum_offload == 0)
                {
                  xd->port_conf.txmode.offloads |= DEV_TX_OFFLOAD_TCP_CKSUM;
                  xd->port_conf.txmode.offloads |= DEV_TX_OFFLOAD_UDP_CKSUM;
                  xd->flags |=
                    DPDK_DEVICE_FLAG_TX_OFFLOAD |
                    DPDK_DEVICE_FLAG_INTEL_PHDR_CKSUM;
                }


              break;
            case VNET_DPDK_PMD_CXGBE:
            case VNET_DPDK_PMD_MLX4:
            case VNET_DPDK_PMD_MLX5:
            case VNET_DPDK_PMD_QEDE:
              xd->port_type = port_type_from_speed_capa (&dev_info);
              break;

              /* SR-IOV VFs */
            case VNET_DPDK_PMD_IGBVF:
            case VNET_DPDK_PMD_IXGBEVF:
            case VNET_DPDK_PMD_I40EVF:
              xd->port_type = VNET_DPDK_PORT_TYPE_ETH_VF;
              if (dm->conf->no_tx_checksum_offload == 0)
                {
                  xd->port_conf.txmode.offloads |= DEV_TX_OFFLOAD_TCP_CKSUM;
                  xd->port_conf.txmode.offloads |= DEV_TX_OFFLOAD_UDP_CKSUM;
                  xd->flags |=
                    DPDK_DEVICE_FLAG_TX_OFFLOAD |
                    DPDK_DEVICE_FLAG_INTEL_PHDR_CKSUM;
                }
              break;

            case VNET_DPDK_PMD_THUNDERX:
              xd->port_type = VNET_DPDK_PORT_TYPE_ETH_VF;

              if (dm->conf->no_tx_checksum_offload == 0)
                {
                  xd->port_conf.txmode.offloads |= DEV_TX_OFFLOAD_TCP_CKSUM;
                  xd->port_conf.txmode.offloads |= DEV_TX_OFFLOAD_UDP_CKSUM;
                  xd->flags |= DPDK_DEVICE_FLAG_TX_OFFLOAD;
                }
              break;

            case VNET_DPDK_PMD_ENA:
              xd->port_type = VNET_DPDK_PORT_TYPE_ETH_VF;
              xd->port_conf.rxmode.offloads &= ~DEV_RX_OFFLOAD_SCATTER;
              break;

            case VNET_DPDK_PMD_DPAA2:
              xd->port_type = VNET_DPDK_PORT_TYPE_ETH_10G;
              break;

              /* Cisco VIC */
            case VNET_DPDK_PMD_ENIC:
                {
                  struct rte_eth_link l;
                  rte_eth_link_get_nowait (i, &l);
                  xd->port_type = port_type_from_link_speed (l.link_speed);
                  if (dm->conf->enable_tcp_udp_checksum)
                    dpdk_enable_l4_csum_offload (xd);
                }
              break;

              /* Intel Red Rock Canyon */
            case VNET_DPDK_PMD_FM10K:
              xd->port_type = VNET_DPDK_PORT_TYPE_ETH_SWITCH;
              break;

              /* virtio */
            case VNET_DPDK_PMD_VIRTIO:
              xd->port_conf.rxmode.mq_mode = ETH_MQ_RX_NONE;
              xd->port_type = VNET_DPDK_PORT_TYPE_ETH_1G;
              xd->nb_rx_desc = DPDK_NB_RX_DESC_VIRTIO;
              xd->nb_tx_desc = DPDK_NB_TX_DESC_VIRTIO;
              break;

              /* vmxnet3 */
            case VNET_DPDK_PMD_VMXNET3:
              xd->port_type = VNET_DPDK_PORT_TYPE_ETH_1G;
              xd->port_conf.txmode.offloads |= DEV_TX_OFFLOAD_MULTI_SEGS;
              break;

            case VNET_DPDK_PMD_AF_PACKET:
              xd->port_type = VNET_DPDK_PORT_TYPE_AF_PACKET;
              xd->af_packet_instance_num = af_packet_instance_num++;
              break;

            case VNET_DPDK_PMD_VIRTIO_USER:
              xd->port_type = VNET_DPDK_PORT_TYPE_VIRTIO_USER;
              break;

            case VNET_DPDK_PMD_VHOST_ETHER:
              xd->port_type = VNET_DPDK_PORT_TYPE_VHOST_ETHER;
              break;

            case VNET_DPDK_PMD_LIOVF_ETHER:
              xd->port_type = VNET_DPDK_PORT_TYPE_ETH_VF;
              break;

            case VNET_DPDK_PMD_FAILSAFE:
              xd->port_type = VNET_DPDK_PORT_TYPE_FAILSAFE;
              xd->port_conf.intr_conf.lsc = 1;
              break;

            case VNET_DPDK_PMD_NETVSC:
                {
                  struct rte_eth_link l;
                  rte_eth_link_get_nowait (i, &l);
                  xd->port_type = port_type_from_link_speed (l.link_speed);
                }
              break;

            default:
              xd->port_type = VNET_DPDK_PORT_TYPE_UNKNOWN;
            }

          if (devconf->num_rx_desc)
            xd->nb_rx_desc = devconf->num_rx_desc;
          else {

            /* If num_rx_desc is not specified by VPP user, the current CPU is working
            with 2M page and has no L3 cache, default num_rx_desc is changed to 512
            from original 1024 to help reduce TLB misses.
            */
            if ((clib_mem_get_default_hugepage_size () == 2 << 20)
              && check_l3cache() == 0)
              xd->nb_rx_desc = 512;
          }

          if (devconf->num_tx_desc)
            xd->nb_tx_desc = devconf->num_tx_desc;
          else {

            /* If num_tx_desc is not specified by VPP user, the current CPU is working
            with 2M page and has no L3 cache, default num_tx_desc is changed to 512
            from original 1024 to help reduce TLB misses.
            */
            if ((clib_mem_get_default_hugepage_size () == 2 << 20)
              && check_l3cache() == 0)
              xd->nb_tx_desc = 512;
          }
       }

      if (xd->pmd == VNET_DPDK_PMD_AF_PACKET)
        {
          f64 now = vlib_time_now (vm);
          u32 rnd;
          rnd = (u32) (now * 1e6);
          rnd = random_u32 (&rnd);
          clib_memcpy (addr + 2, &rnd, sizeof (rnd));
          addr[0] = 2;
          addr[1] = 0xfe;
        }
      else
        rte_eth_macaddr_get (i, (struct ether_addr *) addr);

      if (xd->tx_q_used < tm->n_vlib_mains)
        dpdk_device_lock_init (xd);

      xd->port_id = i;
      xd->device_index = xd - dm->devices;
      xd->per_interface_next_index = ~0;

      /* assign interface to input thread */
      int q;

      if (devconf->hqos_enabled)
        {
          xd->flags |= DPDK_DEVICE_FLAG_HQOS;

          int cpu;
          if (devconf->hqos.hqos_thread_valid)
            {
              if (devconf->hqos.hqos_thread >= dm->hqos_cpu_count)
                return clib_error_return (0, "invalid HQoS thread index");

              cpu = dm->hqos_cpu_first_index + devconf->hqos.hqos_thread;
            }
          else
            {
              if (dm->hqos_cpu_count == 0)
                return clib_error_return (0, "no HQoS threads available");

              cpu = dm->hqos_cpu_first_index + next_hqos_cpu;

              next_hqos_cpu++;
              if (next_hqos_cpu == dm->hqos_cpu_count)
                next_hqos_cpu = 0;

              devconf->hqos.hqos_thread_valid = 1;
              devconf->hqos.hqos_thread = cpu;
            }

          dpdk_device_and_queue_t *dq;
          vec_add2 (dm->devices_by_hqos_cpu[cpu], dq, 1);
          dq->device = xd->device_index;
          dq->queue_id = 0;
        }

      error = ethernet_register_interface
        (dm->vnet_main, dpdk_device_class.index, xd->device_index,
         /* ethernet address */ addr,
         &xd->hw_if_index, dpdk_flag_change);
      if (error)
        return error;

      /*
       * Ensure default mtu is not > the mtu read from the hardware.
       * Otherwise rte_eth_dev_configure() will fail and the port will
       * not be available.
       * Calculate max_frame_size and mtu supported by NIC
       */
      if (ETHERNET_MAX_PACKET_BYTES > dev_info.max_rx_pktlen)
        {
          /*
           * This device does not support the platforms's max frame
           * size. Use it's advertised mru instead.
           */
          max_rx_frame = dev_info.max_rx_pktlen;
          mtu = dev_info.max_rx_pktlen - sizeof (ethernet_header_t);
        }
      else
        {
          /* VPP treats MTU and max_rx_pktlen both equal to
           * ETHERNET_MAX_PACKET_BYTES, if dev_info.max_rx_pktlen >=
           * ETHERNET_MAX_PACKET_BYTES + sizeof(ethernet_header_t)
           */
          if (dev_info.max_rx_pktlen >= (ETHERNET_MAX_PACKET_BYTES +
                                         sizeof (ethernet_header_t)))
            {
              mtu = ETHERNET_MAX_PACKET_BYTES;
              max_rx_frame = ETHERNET_MAX_PACKET_BYTES;

              /*
               * Some platforms do not account for Ethernet FCS (4 bytes) in
               * MTU calculations. To interop with them increase mru but only
               * if the device's settings can support it.
               */
              if (dpdk_port_crc_strip_enabled (xd) &&
                  (dev_info.max_rx_pktlen >= (ETHERNET_MAX_PACKET_BYTES +
                                              sizeof (ethernet_header_t) +
                                              4)))
                {
                  max_rx_frame += 4;
                }
            }
          else
            {
              max_rx_frame = ETHERNET_MAX_PACKET_BYTES;
              mtu = ETHERNET_MAX_PACKET_BYTES - sizeof (ethernet_header_t);

              if (dpdk_port_crc_strip_enabled (xd) &&
                  (dev_info.max_rx_pktlen >= (ETHERNET_MAX_PACKET_BYTES + 4)))
                {
                  max_rx_frame += 4;
                }
            }
        }

      if (xd->pmd == VNET_DPDK_PMD_FAILSAFE)
        {
          /* failsafe device numerables are reported with active device only,
           * need to query the mtu for current device setup to overwrite
           * reported value.
           */
          uint16_t dev_mtu;
          if (!rte_eth_dev_get_mtu (i, &dev_mtu))
            {
              mtu = dev_mtu;
              max_rx_frame = mtu + sizeof (ethernet_header_t);

              if (dpdk_port_crc_strip_enabled (xd))
                {
                  max_rx_frame += 4;
                }
            }
        }

      /*Set port rxmode config */
      xd->port_conf.rxmode.max_rx_pkt_len = max_rx_frame;

      sw = vnet_get_hw_sw_interface (dm->vnet_main, xd->hw_if_index);
      xd->sw_if_index = sw->sw_if_index;
      vnet_hw_interface_set_input_node (dm->vnet_main, xd->hw_if_index,
                                        dpdk_input_node.index);

      if (devconf->workers)
        {
          int i;
          q = 0;
          clib_bitmap_foreach (i, devconf->workers, ({
            vnet_hw_interface_assign_rx_thread (dm->vnet_main, xd->hw_if_index, q++,
                                             vdm->first_worker_thread_index + i);
          }));
        }
      else
        for (q = 0; q < xd->rx_q_used; q++)
          {
            vnet_hw_interface_assign_rx_thread (dm->vnet_main, xd->hw_if_index, q,      /* any */
                                                ~1);
          }

      /*Get vnet hardware interface */
      hi = vnet_get_hw_interface (dm->vnet_main, xd->hw_if_index);

      /*Override default max_packet_bytes and max_supported_bytes set in
       * ethernet_register_interface() above*/
      if (hi)
        {
          hi->max_packet_bytes = mtu;
          hi->max_supported_packet_bytes = max_rx_frame;
          hi->numa_node = xd->cpu_socket;
        }

      if (dm->conf->no_tx_checksum_offload == 0)
        if (xd->flags & DPDK_DEVICE_FLAG_TX_OFFLOAD && hi != NULL)
          hi->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD;

      if (devconf->tso == DPDK_DEVICE_TSO_ON && hi != NULL)
        {
          /*tcp_udp checksum must be enabled*/
          if ((dm->conf->enable_tcp_udp_checksum) &&
              (hi->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD))
            {
                hi->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO;
                vnm->interface_main.gso_interface_count++;
                xd->port_conf.txmode.offloads |= DEV_TX_OFFLOAD_TCP_TSO |
                  DEV_TX_OFFLOAD_UDP_TSO;
            }
          else
            clib_warning ("%s: TCP/UDP checksum offload must be enabled",
              hi->name);
        }

      dpdk_device_setup (xd);

      if (vec_len (xd->errors))
        dpdk_log_err ("setup failed for device %U. Errors:\n  %U",
                      format_dpdk_device_name, i,
                      format_dpdk_device_errors, xd);

      if (devconf->hqos_enabled)
        {
          clib_error_t *rv;
          rv = dpdk_port_setup_hqos (xd, &devconf->hqos);
          if (rv)
            return rv;
        }

      /*
       * A note on Cisco VIC (PMD_ENIC) and VLAN:
       *
       * With Cisco VIC vNIC, every ingress packet is tagged. On a
       * trunk vNIC (C series "standalone" server), packets on no VLAN
       * are tagged with vlan 0. On an access vNIC (standalone or B
       * series "blade" server), packets on the default/native VLAN
       * are tagged with that vNIC's VLAN. VPP expects these packets
       * to be untagged, and previously enabled VLAN strip on VIC by
       * default. But it also broke vlan sub-interfaces.
       *
       * The VIC adapter has "untag default vlan" ingress VLAN rewrite
       * mode, which removes tags from these packets. VPP now includes
       * a local patch for the enic driver to use this untag mode, so
       * enabling vlan stripping is no longer needed. In future, the
       * driver + dpdk will have an API to set the mode after
       * rte_eal_init. Then, this note and local patch will be
       * removed.
       */

      /*
       * VLAN stripping: default to VLAN strip disabled, unless specified
       * otherwise in the startup config.
       */

      vlan_off = rte_eth_dev_get_vlan_offload (xd->port_id);
      if (devconf->vlan_strip_offload == DPDK_DEVICE_VLAN_STRIP_ON)
        {
          vlan_off |= ETH_VLAN_STRIP_OFFLOAD;
          if (rte_eth_dev_set_vlan_offload (xd->port_id, vlan_off) >= 0)
            dpdk_log_info ("VLAN strip enabled for interface\n");
          else
            dpdk_log_warn ("VLAN strip cannot be supported by interface\n");
          xd->port_conf.rxmode.offloads |= DEV_RX_OFFLOAD_VLAN_STRIP;
        }
      else
        {
          if (vlan_off & ETH_VLAN_STRIP_OFFLOAD)
            {
              vlan_off &= ~ETH_VLAN_STRIP_OFFLOAD;
              if (rte_eth_dev_set_vlan_offload (xd->port_id, vlan_off) >= 0)
                dpdk_log_warn ("set VLAN offload failed\n");
            }
          xd->port_conf.rxmode.offloads &= ~DEV_RX_OFFLOAD_VLAN_STRIP;
        }

      if (hi)
        hi->max_packet_bytes = xd->port_conf.rxmode.max_rx_pkt_len
          - sizeof (ethernet_header_t);
      else
        dpdk_log_warn ("hi NULL");

      if (dm->conf->no_multi_seg)
        mtu = mtu > ETHER_MAX_LEN ? ETHER_MAX_LEN : mtu;

      rte_eth_dev_set_mtu (xd->port_id, mtu);
    }
  /* *INDENT-ON* */

  return 0;
}

static void
dpdk_bind_devices_to_uio (dpdk_config_main_t * conf)
{
  vlib_main_t *vm = vlib_get_main ();
  clib_error_t *error;
  u8 *pci_addr = 0;
  int num_whitelisted = vec_len (conf->dev_confs);
  vlib_pci_device_info_t *d = 0;
  vlib_pci_addr_t *addr = 0, *addrs;
  int i;

  addrs = vlib_pci_get_all_dev_addrs ();
  /* *INDENT-OFF* */
  vec_foreach (addr, addrs)
    {
    dpdk_device_config_t * devconf = 0;
    vec_reset_length (pci_addr);
    pci_addr = format (pci_addr, "%U%c", format_vlib_pci_addr, addr, 0);
    if (d)
    {
      vlib_pci_free_device_info (d);
      d = 0;
      }
    d = vlib_pci_get_device_info (vm, addr, &error);
    if (error)
    {
      clib_error_report (error);
      continue;
    }

    if (d->device_class != PCI_CLASS_NETWORK_ETHERNET && d->device_class != PCI_CLASS_PROCESSOR_CO)
      continue;

    if (num_whitelisted)
      {
        uword * p = hash_get (conf->device_config_index_by_pci_addr, addr->as_u32);

        if (!p)
          {
          skipped:
            continue;
          }

        devconf = pool_elt_at_index (conf->dev_confs, p[0]);
      }

    /* Enforce Device blacklist by vendor and device */
    for (i = 0; i < vec_len (conf->blacklist_by_pci_vendor_and_device); i++)
      {
        u16 vendor, device;
        vendor = (u16)(conf->blacklist_by_pci_vendor_and_device[i] >> 16);
        device = (u16)(conf->blacklist_by_pci_vendor_and_device[i] & 0xFFFF);
        if (d->vendor_id == vendor && d->device_id == device)
          {
            /*
             * Expected case: device isn't whitelisted,
             * so blacklist it...
             */
            if (devconf == 0)
              {
                /* Device is blacklisted */
                pool_get (conf->dev_confs, devconf);
                hash_set (conf->device_config_index_by_pci_addr, addr->as_u32,
                          devconf - conf->dev_confs);
                devconf->pci_addr.as_u32 = addr->as_u32;
                devconf->is_blacklisted = 1;
                goto skipped;
              }
            else /* explicitly whitelisted, ignore the device blacklist  */
              break;
          }
      }

    /* virtio */
    if (d->vendor_id == 0x1af4 &&
            (d->device_id == VIRTIO_PCI_LEGACY_DEVICEID_NET ||
             d->device_id == VIRTIO_PCI_MODERN_DEVICEID_NET))
      ;
    /* vmxnet3 */
    else if (d->vendor_id == 0x15ad && d->device_id == 0x07b0)
      {
        /*
         * For vmxnet3 PCI, unless it is explicitly specified in the whitelist,
         * the default is to put it in the blacklist.
         */
        if (devconf == 0)
          {
            pool_get (conf->dev_confs, devconf);
            hash_set (conf->device_config_index_by_pci_addr, addr->as_u32,
                      devconf - conf->dev_confs);
            devconf->pci_addr.as_u32 = addr->as_u32;
            devconf->is_blacklisted = 1;
          }
      }
    /* all Intel network devices */
    else if (d->vendor_id == 0x8086 && d->device_class == PCI_CLASS_NETWORK_ETHERNET)
      ;
    /* all Intel QAT devices VFs */
    else if (d->vendor_id == 0x8086 && d->device_class == PCI_CLASS_PROCESSOR_CO &&
        (d->device_id == 0x0443 || d->device_id == 0x18a1 || d->device_id == 0x19e3 ||
        d->device_id == 0x37c9 || d->device_id == 0x6f55))
      ;
    /* Cisco VIC */
    else if (d->vendor_id == 0x1137 &&
        (d->device_id == 0x0043 || d->device_id == 0x0071))
      ;
    /* Chelsio T4/T5 */
    else if (d->vendor_id == 0x1425 && (d->device_id & 0xe000) == 0x4000)
      ;
    /* Amazon Elastic Network Adapter */
    else if (d->vendor_id == 0x1d0f && d->device_id >= 0xec20 && d->device_id <= 0xec21)
      ;
    /* Cavium Network Adapter */
    else if (d->vendor_id == 0x177d && d->device_id == 0x9712)
      ;
    /* Cavium FastlinQ QL41000 Series */
    else if (d->vendor_id == 0x1077 && d->device_id >= 0x8070 && d->device_id <= 0x8090)
      ;
    /* Mellanox mlx4 */
    else if (d->vendor_id == 0x15b3 && d->device_id >= 0x1003 && d->device_id <= 0x1004)
      {
        continue;
      }
    /* Mellanox mlx5 */
    else if (d->vendor_id == 0x15b3 && d->device_id >= 0x1013 && d->device_id <= 0x101a)
      {
        continue;
      }
    else
      {
        dpdk_log_warn ("Unsupported PCI device 0x%04x:0x%04x found "
                      "at PCI address %s\n", (u16) d->vendor_id, (u16) d->device_id,
                      pci_addr);
        continue;
      }

    error = vlib_pci_bind_to_uio (vm, addr, (char *) conf->uio_driver_name);

    if (error)
      {
        if (devconf == 0)
          {
            pool_get (conf->dev_confs, devconf);
            hash_set (conf->device_config_index_by_pci_addr, addr->as_u32,
                      devconf - conf->dev_confs);
            devconf->pci_addr.as_u32 = addr->as_u32;
          }
        devconf->is_blacklisted = 1;
        clib_error_report (error);
      }
  }
  /* *INDENT-ON* */
  vec_free (pci_addr);
  vlib_pci_free_device_info (d);
}

static void
dpdk_bind_vmbus_devices_to_uio (dpdk_config_main_t * conf)
{
  clib_error_t *error;
  vlib_vmbus_addr_t *addrs, *addr = 0;

  addrs = vlib_vmbus_get_all_dev_addrs ();

  /* *INDENT-OFF* */
  vec_foreach (addr, addrs)
    {
      error = vlib_vmbus_bind_to_uio (addr);

      if (error)
        {
          clib_error_report (error);
        }
    }
  /* *INDENT-ON* */
}

static clib_error_t *
dpdk_device_config (dpdk_config_main_t * conf, vlib_pci_addr_t pci_addr,
                    unformat_input_t * input, u8 is_default)
{
  clib_error_t *error = 0;
  uword *p;
  dpdk_device_config_t *devconf;
  unformat_input_t sub_input;

  if (is_default)
    {
      devconf = &conf->default_devconf;
    }
  else
    {
      p = hash_get (conf->device_config_index_by_pci_addr, pci_addr.as_u32);

      if (!p)
        {
          pool_get (conf->dev_confs, devconf);
          hash_set (conf->device_config_index_by_pci_addr, pci_addr.as_u32,
                    devconf - conf->dev_confs);
        }
      else
        return clib_error_return (0,
                                  "duplicate configuration for PCI address %U",
                                  format_vlib_pci_addr, &pci_addr);
    }

  devconf->pci_addr.as_u32 = pci_addr.as_u32;
  devconf->hqos_enabled = 0;
  devconf->tso = DPDK_DEVICE_TSO_DEFAULT;
#if 0
  dpdk_device_config_hqos_default (&devconf->hqos);
#endif

  if (!input)
    return 0;

  unformat_skip_white_space (input);
  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
    {
      if (unformat (input, "num-rx-queues %u", &devconf->num_rx_queues))
        ;
      else if (unformat (input, "num-tx-queues %u", &devconf->num_tx_queues))
        ;
      else if (unformat (input, "num-rx-desc %u", &devconf->num_rx_desc))
        ;
      else if (unformat (input, "num-tx-desc %u", &devconf->num_tx_desc))
        ;
      else if (unformat (input, "name %s", &devconf->name))
        ;
      else if (unformat (input, "workers %U", unformat_bitmap_list,
                         &devconf->workers))
        ;
      else
        if (unformat
            (input, "rss %U", unformat_vlib_cli_sub_input, &sub_input))
        {
          error = unformat_rss_fn (&sub_input, &devconf->rss_fn);
          if (error)
            break;
        }
      else if (unformat (input, "vlan-strip-offload off"))
        devconf->vlan_strip_offload = DPDK_DEVICE_VLAN_STRIP_OFF;
      else if (unformat (input, "vlan-strip-offload on"))
        devconf->vlan_strip_offload = DPDK_DEVICE_VLAN_STRIP_ON;
      else
        if (unformat
            (input, "hqos %U", unformat_vlib_cli_sub_input, &sub_input))
        {
          devconf->hqos_enabled = 1;
          error = unformat_hqos (&sub_input, &devconf->hqos);
          if (error)
            break;
        }
      else if (unformat (input, "hqos"))
        {
          devconf->hqos_enabled = 1;
        }
      else if (unformat (input, "tso on"))
        {
          devconf->tso = DPDK_DEVICE_TSO_ON;
        }
      else if (unformat (input, "tso off"))
        {
          devconf->tso = DPDK_DEVICE_TSO_OFF;
        }
      else
        {
          error = clib_error_return (0, "unknown input `%U'",
                                     format_unformat_error, input);
          break;
        }
    }

  if (error)
    return error;

  if (devconf->workers && devconf->num_rx_queues == 0)
    devconf->num_rx_queues = clib_bitmap_count_set_bits (devconf->workers);
  else if (devconf->workers &&
           clib_bitmap_count_set_bits (devconf->workers) !=
           devconf->num_rx_queues)
    error =
      clib_error_return (0,
                         "%U: number of worker threads must be "
                         "equal to number of rx queues", format_vlib_pci_addr,
                         &pci_addr);

  return error;
}

static clib_error_t *
dpdk_log_read_ready (clib_file_t * uf)
{
  unformat_input_t input;
  u8 *line, *s = 0;
  int n, n_try;

  n = n_try = 4096;
  while (n == n_try)
    {
      uword len = vec_len (s);
      vec_resize (s, len + n_try);

      n = read (uf->file_descriptor, s + len, n_try);
      if (n < 0 && errno != EAGAIN)
        return clib_error_return_unix (0, "read");
      _vec_len (s) = len + (n < 0 ? 0 : n);
    }

  unformat_init_vector (&input, s);

  while (unformat_user (&input, unformat_line, &line))
    {
      dpdk_log_notice ("%v", line);
      vec_free (line);
    }

  unformat_free (&input);
  return 0;
}

static clib_error_t *
dpdk_config (vlib_main_t * vm, unformat_input_t * input)
{
  clib_error_t *error = 0;
  dpdk_config_main_t *conf = &dpdk_config_main;
  vlib_thread_main_t *tm = vlib_get_thread_main ();
  dpdk_device_config_t *devconf;
  vlib_pci_addr_t pci_addr;
  unformat_input_t sub_input;
  uword default_hugepage_sz, x;
  u8 *s, *tmp = 0;
  int ret, i;
  int num_whitelisted = 0;
  u8 no_pci = 0;
  u8 no_vmbus = 0;
  u8 file_prefix = 0;
  u8 *socket_mem = 0;
  u8 *huge_dir_path = 0;
  u32 vendor, device;

  huge_dir_path =
    format (0, "%s/hugepages%c", vlib_unix_get_runtime_dir (), 0);

  conf->device_config_index_by_pci_addr = hash_create (0, sizeof (uword));

  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
    {
      /* Prime the pump */
      if (unformat (input, "no-hugetlb"))
        {
          vec_add1 (conf->eal_init_args, (u8 *) "--no-huge");
        }

      else if (unformat (input, "enable-tcp-udp-checksum"))
        conf->enable_tcp_udp_checksum = 1;

      else if (unformat (input, "no-tx-checksum-offload"))
        conf->no_tx_checksum_offload = 1;

      else if (unformat (input, "decimal-interface-names"))
        conf->interface_name_format_decimal = 1;

      else if (unformat (input, "no-multi-seg"))
        conf->no_multi_seg = 1;

      else if (unformat (input, "dev default %U", unformat_vlib_cli_sub_input,
                         &sub_input))
        {
          error =
            dpdk_device_config (conf, (vlib_pci_addr_t) (u32) ~ 1, &sub_input,
                                1);

          if (error)
            return error;
        }
      else
        if (unformat
            (input, "dev %U %U", unformat_vlib_pci_addr, &pci_addr,
             unformat_vlib_cli_sub_input, &sub_input))
        {
          error = dpdk_device_config (conf, pci_addr, &sub_input, 0);

          if (error)
            return error;

          num_whitelisted++;
        }
      else if (unformat (input, "dev %U", unformat_vlib_pci_addr, &pci_addr))
        {
          error = dpdk_device_config (conf, pci_addr, 0, 0);

          if (error)
            return error;

          num_whitelisted++;
        }
      else if (unformat (input, "num-mem-channels %d", &conf->nchannels))
        conf->nchannels_set_manually = 0;
      else if (unformat (input, "num-crypto-mbufs %d",
                         &conf->num_crypto_mbufs))
        ;
      else if (unformat (input, "uio-driver %s", &conf->uio_driver_name))
        ;
      else if (unformat (input, "socket-mem %s", &socket_mem))
        ;
      else if (unformat (input, "no-pci"))
        {
          no_pci = 1;
          tmp = format (0, "--no-pci%c", 0);
          vec_add1 (conf->eal_init_args, tmp);
        }
      else if (unformat (input, "blacklist %x:%x", &vendor, &device))
        {
          u32 blacklist_entry;
          if (vendor > 0xFFFF)
            return clib_error_return (0, "blacklist PCI vendor out of range");
          if (device > 0xFFFF)
            return clib_error_return (0, "blacklist PCI device out of range");
          blacklist_entry = (vendor << 16) | (device & 0xffff);
          vec_add1 (conf->blacklist_by_pci_vendor_and_device,
                    blacklist_entry);
        }
      else if (unformat (input, "no-vmbus"))
        {
          no_vmbus = 1;
          tmp = format (0, "--no-vmbus%c", 0);
          vec_add1 (conf->eal_init_args, tmp);
        }

#define _(a)                                    \
      else if (unformat(input, #a))             \
        {                                       \
          tmp = format (0, "--%s%c", #a, 0);    \
          vec_add1 (conf->eal_init_args, tmp);    \
        }
      foreach_eal_double_hyphen_predicate_arg
#undef _
#define _(a)                                          \
        else if (unformat(input, #a " %s", &s))       \
          {                                           \
            if (!strncmp(#a, "file-prefix", 11)) \
              file_prefix = 1;                        \
            tmp = format (0, "--%s%c", #a, 0);        \
            vec_add1 (conf->eal_init_args, tmp);      \
            vec_add1 (s, 0);                          \
            if (!strncmp(#a, "vdev", 4))              \
              if (strstr((char*)s, "af_packet"))      \
                clib_warning ("af_packet obsoleted. Use CLI 'create host-interface'."); \
            vec_add1 (conf->eal_init_args, s);        \
          }
        foreach_eal_double_hyphen_arg
#undef _
#define _(a,b)                                          \
          else if (unformat(input, #a " %s", &s))       \
            {                                           \
              tmp = format (0, "-%s%c", #b, 0);         \
              vec_add1 (conf->eal_init_args, tmp);      \
              vec_add1 (s, 0);                          \
              vec_add1 (conf->eal_init_args, s);        \
            }
        foreach_eal_single_hyphen_arg
#undef _
#define _(a,b)                                          \
            else if (unformat(input, #a " %s", &s))     \
              {                                         \
                tmp = format (0, "-%s%c", #b, 0);       \
                vec_add1 (conf->eal_init_args, tmp);    \
                vec_add1 (s, 0);                        \
                vec_add1 (conf->eal_init_args, s);      \
                conf->a##_set_manually = 1;             \
              }
        foreach_eal_single_hyphen_mandatory_arg
#undef _
        else if (unformat (input, "default"))
        ;

      else if (unformat_skip_white_space (input))
        ;
      else
        {
          error = clib_error_return (0, "unknown input `%U'",
                                     format_unformat_error, input);
          goto done;
        }
    }

  if (!conf->uio_driver_name)
    conf->uio_driver_name = format (0, "auto%c", 0);

  default_hugepage_sz = clib_mem_get_default_hugepage_size ();

  /* *INDENT-OFF* */
  clib_bitmap_foreach (x, tm->cpu_socket_bitmap, (
    {
      clib_error_t *e;
      uword n_pages;
      /* preallocate at least 16MB of hugepages per socket,
         if more is needed it is up to consumer to preallocate more */
      n_pages = round_pow2 ((uword) 16 << 20, default_hugepage_sz);
      n_pages /= default_hugepage_sz;

      if ((e = clib_sysfs_prealloc_hugepages(x, 0, n_pages)))
        clib_error_report (e);
  }));
  /* *INDENT-ON* */

  if (!file_prefix)
    {
      tmp = format (0, "--file-prefix%c", 0);
      vec_add1 (conf->eal_init_args, tmp);
      tmp = format (0, "vpp%c", 0);
      vec_add1 (conf->eal_init_args, tmp);
    }

  if (error)
    return error;

  /* I'll bet that -c and -n must be the first and second args... */
  if (!conf->coremask_set_manually)
    {
      vlib_thread_registration_t *tr;
      uword *coremask = 0;
      int i;

      /* main thread core */
      coremask = clib_bitmap_set (coremask, tm->main_lcore, 1);

      for (i = 0; i < vec_len (tm->registrations); i++)
        {
          tr = tm->registrations[i];
          coremask = clib_bitmap_or (coremask, tr->coremask);
        }

      vec_insert (conf->eal_init_args, 2, 1);
      conf->eal_init_args[1] = (u8 *) "-c";
      tmp = format (0, "%U%c", format_bitmap_hex, coremask, 0);
      conf->eal_init_args[2] = tmp;
      clib_bitmap_free (coremask);
    }

  if (!conf->nchannels_set_manually)
    {
      vec_insert (conf->eal_init_args, 2, 3);
      conf->eal_init_args[3] = (u8 *) "-n";
      tmp = format (0, "%d", conf->nchannels);
      vec_terminate_c_string (tmp);
      conf->eal_init_args[4] = tmp;
    }

  if (no_pci == 0 && geteuid () == 0)
    dpdk_bind_devices_to_uio (conf);

  if (no_vmbus == 0 && geteuid () == 0)
    dpdk_bind_vmbus_devices_to_uio (conf);

#define _(x) \
    if (devconf->x == 0 && conf->default_devconf.x > 0) \
      devconf->x = conf->default_devconf.x ;

  /* *INDENT-OFF* */
  pool_foreach (devconf, conf->dev_confs, ({

    /* default per-device config items */
    foreach_dpdk_device_config_item

    /* copy vlan_strip config from default device */
        if (devconf->vlan_strip_offload == 0 &&
                conf->default_devconf.vlan_strip_offload > 0)
                devconf->vlan_strip_offload =
                        conf->default_devconf.vlan_strip_offload;

        /* copy tso config from default device */
        _(tso)

    /* add DPDK EAL whitelist/blacklist entry */
    if (num_whitelisted > 0 && devconf->is_blacklisted == 0)
      {
        tmp = format (0, "-w%c", 0);
        vec_add1 (conf->eal_init_args, tmp);
        tmp = format (0, "%U%c", format_vlib_pci_addr, &devconf->pci_addr, 0);
        vec_add1 (conf->eal_init_args, tmp);
      }
    else if (num_whitelisted == 0 && devconf->is_blacklisted != 0)
      {
        tmp = format (0, "-b%c", 0);
        vec_add1 (conf->eal_init_args, tmp);
        tmp = format (0, "%U%c", format_vlib_pci_addr, &devconf->pci_addr, 0);
        vec_add1 (conf->eal_init_args, tmp);
      }
  }));
  /* *INDENT-ON* */

#undef _

  /* set master-lcore */
  tmp = format (0, "--master-lcore%c", 0);
  vec_add1 (conf->eal_init_args, tmp);
  tmp = format (0, "%u%c", tm->main_lcore, 0);
  vec_add1 (conf->eal_init_args, tmp);


  if (socket_mem)
    clib_warning ("socket-mem argument is deprecated");

  /* NULL terminate the "argv" vector, in case of stupidity */
  vec_add1 (conf->eal_init_args, 0);
  _vec_len (conf->eal_init_args) -= 1;

  /* Set up DPDK eal and packet mbuf pool early. */

  int log_fds[2] = { 0 };
  if (pipe (log_fds) == 0)
    {
      if (fcntl (log_fds[1], F_SETFL, O_NONBLOCK) == 0)
        {
          FILE *f = fdopen (log_fds[1], "a");
          if (f && rte_openlog_stream (f) == 0)
            {
              clib_file_t t = { 0 };
              t.read_function = dpdk_log_read_ready;
              t.file_descriptor = log_fds[0];
              t.description = format (0, "DPDK logging pipe");
              clib_file_add (&file_main, &t);
            }
        }
      else
        {
          close (log_fds[0]);
          close (log_fds[1]);
        }
    }

  vm = vlib_get_main ();

  /* make copy of args as rte_eal_init tends to mess up with arg array */
  for (i = 1; i < vec_len (conf->eal_init_args); i++)
    conf->eal_init_args_str = format (conf->eal_init_args_str, "%s ",
                                      conf->eal_init_args[i]);

  vec_terminate_c_string (conf->eal_init_args_str);

  dpdk_log_warn ("EAL init args: %s", conf->eal_init_args_str);
  ret = rte_eal_init (vec_len (conf->eal_init_args),
                      (char **) conf->eal_init_args);

  /* lazy umount hugepages */
  umount2 ((char *) huge_dir_path, MNT_DETACH);
  rmdir ((char *) huge_dir_path);
  vec_free (huge_dir_path);

  if (ret < 0)
    return clib_error_return (0, "rte_eal_init returned %d", ret);

  /* main thread 1st */
  if ((error = dpdk_buffer_pools_create (vm)))
    return error;

done:
  return error;
}

VLIB_CONFIG_FUNCTION (dpdk_config, "dpdk");

void
dpdk_update_link_state (dpdk_device_t * xd, f64 now)
{
  vnet_main_t *vnm = vnet_get_main ();
  struct rte_eth_link prev_link = xd->link;
  u32 hw_flags = 0;
  u8 hw_flags_chg = 0;

  /* only update link state for PMD interfaces */
  if ((xd->flags & DPDK_DEVICE_FLAG_PMD) == 0)
    return;

  xd->time_last_link_update = now ? now : xd->time_last_link_update;
  clib_memset (&xd->link, 0, sizeof (xd->link));
  rte_eth_link_get_nowait (xd->port_id, &xd->link);

  if (LINK_STATE_ELOGS)
    {
      vlib_main_t *vm = vlib_get_main ();
      ELOG_TYPE_DECLARE (e) =
      {
      .format =
          "update-link-state: sw_if_index %d, admin_up %d,"
          "old link_state %d new link_state %d",.format_args = "i4i1i1i1",};

      struct
      {
        u32 sw_if_index;
        u8 admin_up;
        u8 old_link_state;
        u8 new_link_state;
      } *ed;
      ed = ELOG_DATA (&vm->elog_main, e);
      ed->sw_if_index = xd->sw_if_index;
      ed->admin_up = (xd->flags & DPDK_DEVICE_FLAG_ADMIN_UP) != 0;
      ed->old_link_state = (u8)
        vnet_hw_interface_is_link_up (vnm, xd->hw_if_index);
      ed->new_link_state = (u8) xd->link.link_status;
    }

  if ((xd->link.link_duplex != prev_link.link_duplex))
    {
      hw_flags_chg = 1;
      switch (xd->link.link_duplex)
        {
        case ETH_LINK_HALF_DUPLEX:
          hw_flags |= VNET_HW_INTERFACE_FLAG_HALF_DUPLEX;
          break;
        case ETH_LINK_FULL_DUPLEX:
          hw_flags |= VNET_HW_INTERFACE_FLAG_FULL_DUPLEX;
          break;
        default:
          break;
        }
    }
  if (xd->link.link_speed != prev_link.link_speed)
    vnet_hw_interface_set_link_speed (vnm, xd->hw_if_index,
                                      xd->link.link_speed * 1000);

  if (xd->link.link_status != prev_link.link_status)
    {
      hw_flags_chg = 1;

      if (xd->link.link_status)
        hw_flags |= VNET_HW_INTERFACE_FLAG_LINK_UP;
    }

  if (hw_flags_chg)
    {
      if (LINK_STATE_ELOGS)
        {
          vlib_main_t *vm = vlib_get_main ();

          ELOG_TYPE_DECLARE (e) =
          {
          .format =
              "update-link-state: sw_if_index %d, new flags %d",.format_args
              = "i4i4",};

          struct
          {
            u32 sw_if_index;
            u32 flags;
          } *ed;
          ed = ELOG_DATA (&vm->elog_main, e);
          ed->sw_if_index = xd->sw_if_index;
          ed->flags = hw_flags;
        }
      vnet_hw_interface_set_flags (vnm, xd->hw_if_index, hw_flags);
    }
}

static uword
dpdk_process (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_frame_t * f)
{
  clib_error_t *error;
  dpdk_main_t *dm = &dpdk_main;
  dpdk_device_t *xd;
  vlib_thread_main_t *tm = vlib_get_thread_main ();

  error = dpdk_lib_init (dm);

  if (error)
    clib_error_report (error);

  tm->worker_thread_release = 1;

  f64 now = vlib_time_now (vm);
  vec_foreach (xd, dm->devices)
  {
    dpdk_update_link_state (xd, now);
  }

  while (1)
    {
      /*
       * check each time through the loop in case intervals are changed
       */
      f64 min_wait = dm->link_state_poll_interval < dm->stat_poll_interval ?
        dm->link_state_poll_interval : dm->stat_poll_interval;

      vlib_process_wait_for_event_or_clock (vm, min_wait);

      if (dm->admin_up_down_in_progress)
        /* skip the poll if an admin up down is in progress (on any interface) */
        continue;

      vec_foreach (xd, dm->devices)
      {
        f64 now = vlib_time_now (vm);
        if ((now - xd->time_last_stats_update) >= dm->stat_poll_interval)
          dpdk_update_counters (xd, now);
        if ((now - xd->time_last_link_update) >= dm->link_state_poll_interval)
          dpdk_update_link_state (xd, now);

      }
    }

  return 0;
}

/* *INDENT-OFF* */
VLIB_REGISTER_NODE (dpdk_process_node,static) = {
    .function = dpdk_process,
    .type = VLIB_NODE_TYPE_PROCESS,
    .name = "dpdk-process",
    .process_log2_n_stack_bytes = 17,
};
/* *INDENT-ON* */

static clib_error_t *
dpdk_init (vlib_main_t * vm)
{
  dpdk_main_t *dm = &dpdk_main;
  clib_error_t *error = 0;

  /* verify that structs are cacheline aligned */
  STATIC_ASSERT (offsetof (dpdk_device_t, cacheline0) == 0,
                 "Cache line marker must be 1st element in dpdk_device_t");
  STATIC_ASSERT (offsetof (dpdk_device_t, cacheline1) ==
                 CLIB_CACHE_LINE_BYTES,
                 "Data in cache line 0 is bigger than cache line size");
  STATIC_ASSERT (offsetof (frame_queue_trace_t, cacheline0) == 0,
                 "Cache line marker must be 1st element in frame_queue_trace_t");
  STATIC_ASSERT (RTE_CACHE_LINE_SIZE == 1 << CLIB_LOG2_CACHE_LINE_BYTES,
                 "DPDK RTE CACHE LINE SIZE does not match with 1<<CLIB_LOG2_CACHE_LINE_BYTES");

  dpdk_cli_reference ();

  dm->vlib_main = vm;
  dm->vnet_main = vnet_get_main ();
  dm->conf = &dpdk_config_main;

  dm->conf->nchannels = 4;
  vec_add1 (dm->conf->eal_init_args, (u8 *) "vnet");
  vec_add1 (dm->conf->eal_init_args, (u8 *) "--in-memory");

  /* Default vlib_buffer_t flags, DISABLES tcp/udp checksumming... */
  dm->buffer_flags_template = (VLIB_BUFFER_TOTAL_LENGTH_VALID |
                               VLIB_BUFFER_EXT_HDR_VALID |
                               VNET_BUFFER_F_L4_CHECKSUM_COMPUTED |
                               VNET_BUFFER_F_L4_CHECKSUM_CORRECT);

  dm->stat_poll_interval = DPDK_STATS_POLL_INTERVAL;
  dm->link_state_poll_interval = DPDK_LINK_POLL_INTERVAL;

  dm->log_default = vlib_log_register_class ("dpdk", 0);

  return error;
}

VLIB_INIT_FUNCTION (dpdk_init);

/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */