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

dpdk_main_t dpdk_main;

#define LINK_STATE_ELOGS        0

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

static struct rte_eth_conf port_conf_template = {
  .rxmode = {
             .split_hdr_size = 0,
             .header_split = 0,         /**< Header Split disabled */
             .hw_ip_checksum = 0,       /**< IP checksum offload disabled */
             .hw_vlan_filter = 0,       /**< VLAN filtering disabled */
             .hw_strip_crc = 0,         /**< CRC stripped by hardware */
             },
  .txmode = {
             .mq_mode = ETH_MQ_TX_NONE,
             },
};

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_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_10G)
    return VNET_DPDK_PORT_TYPE_ETH_10G;
  else if (dev_info->speed_capa & ETH_LINK_SPEED_1G)
    return VNET_DPDK_PORT_TYPE_ETH_1G;

  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->device_index);
          else
            rte_eth_promiscuous_disable (xd->device_index);
        }
    }
  else if (ETHERNET_INTERFACE_FLAG_CONFIG_MTU (flags))
    {
      int rv;

      xd->port_conf.rxmode.max_rx_pkt_len = hi->max_packet_bytes;

      if (xd->flags & DPDK_DEVICE_FLAG_ADMIN_UP)
        dpdk_device_stop (xd);

      rv = rte_eth_dev_configure
        (xd->device_index, xd->rx_q_used, xd->tx_q_used, &xd->port_conf);

      if (rv < 0)
        vlib_cli_output (vlib_get_main (),
                         "rte_eth_dev_configure[%d]: err %d",
                         xd->device_index, rv);

      rte_eth_dev_set_mtu (xd->device_index, hi->max_packet_bytes);

      if (xd->flags & DPDK_DEVICE_FLAG_ADMIN_UP)
        dpdk_device_start (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);
      memset ((void *) xd->lockp[q], 0, CLIB_CACHE_LINE_BYTES);
    }
}

static clib_error_t *
dpdk_lib_init (dpdk_main_t * dm)
{
  u32 nports;
  u32 nb_desc = 0;
  int i;
  clib_error_t *error;
  vlib_main_t *vm = vlib_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_port_id = 0;
  u8 bond_ether_port_id = 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 ();
  if (nports < 1)
    {
      clib_warning ("DPDK drivers found no ports...");
    }

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

  /*
   * All buffers are all allocated from the same rte_mempool.
   * Thus they all have the same number of data bytes.
   */
  dm->vlib_buffer_free_list_index =
    vlib_buffer_get_or_create_free_list (vm,
                                         VLIB_BUFFER_DEFAULT_FREE_LIST_BYTES,
                                         "dpdk rx");

  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->buffer_templates, tm->n_vlib_mains - 1,
                        CLIB_CACHE_LINE_BYTES);
  for (i = 0; i < tm->n_vlib_mains; i++)
    {
      vlib_buffer_free_list_t *fl;
      vlib_buffer_t *bt = vec_elt_at_index (dm->buffer_templates, i);
      fl = vlib_buffer_get_free_list (vm,
                                      VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
      vlib_buffer_init_for_free_list (bt, fl);
      bt->flags = dm->buffer_flags_template;
      bt->current_data = -RTE_PKTMBUF_HEADROOM;
      vnet_buffer (bt)->sw_if_index[VLIB_TX] = (u32) ~ 0;
    }

  for (i = 0; i < nports; i++)
    {
      u8 addr[6];
      u8 vlan_strip = 0;
      int j;
      struct rte_eth_dev_info dev_info;
      struct rte_eth_link l;
      dpdk_device_config_t *devconf = 0;
      vlib_pci_addr_t pci_addr;
      uword *p = 0;

      rte_eth_dev_info_get (i, &dev_info);
      if (dev_info.pci_dev)     /* bonded interface has no pci info */
        {
          pci_addr.domain = dev_info.pci_dev->addr.domain;
          pci_addr.bus = dev_info.pci_dev->addr.bus;
          pci_addr.slot = dev_info.pci_dev->addr.devid;
          pci_addr.function = dev_info.pci_dev->addr.function;
          p =
            hash_get (dm->conf->device_config_index_by_pci_addr,
                      pci_addr.as_u32);
        }

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

      /* 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);

      /* Handle interface naming for devices with multiple ports sharing same PCI ID */
      if (dev_info.pci_dev)
        {
          struct rte_eth_dev_info di = { 0 };
          rte_eth_dev_info_get (i + 1, &di);
          if (di.pci_dev && pci_addr.as_u32 != last_pci_addr.as_u32 &&
              memcmp (&dev_info.pci_dev->addr, &di.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 (dm->conf->no_multi_seg)
        {
          xd->tx_conf.txq_flags |= ETH_TXQ_FLAGS_NOMULTSEGS;
          port_conf_template.rxmode.jumbo_frame = 0;
          port_conf_template.rxmode.enable_scatter = 0;
        }
      else
        {
          xd->tx_conf.txq_flags &= ~ETH_TXQ_FLAGS_NOMULTSEGS;
          port_conf_template.rxmode.jumbo_frame = 1;
          port_conf_template.rxmode.enable_scatter = 1;
          xd->flags |= DPDK_DEVICE_FLAG_MAYBE_MULTISEG;
        }

      clib_memcpy (&xd->port_conf, &port_conf_template,
                   sizeof (struct rte_eth_conf));

      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 && dm->use_rss == 0)
        {
          dm->use_rss = 1;
        }

      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
            xd->port_conf.rx_adv_conf.rss_conf.rss_hf = devconf->rss_fn;
        }
      else
        xd->rx_q_used = 1;

      xd->flags |= DPDK_DEVICE_FLAG_PMD;

      /* workaround for drivers not setting driver_name */
      if ((!dev_info.driver_name) && (dev_info.pci_dev))
        dev_info.driver_name = dev_info.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:
              xd->port_type = port_type_from_speed_capa (&dev_info);
              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:
              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;
              xd->port_conf.rxmode.hw_strip_crc = 1;
              break;

            case VNET_DPDK_PMD_THUNDERX:
              xd->port_type = VNET_DPDK_PORT_TYPE_ETH_VF;
              xd->port_conf.rxmode.hw_strip_crc = 1;
              break;

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

              /* Cisco VIC */
            case VNET_DPDK_PMD_ENIC:
              rte_eth_link_get_nowait (i, &l);
              if (l.link_speed == 40000)
                xd->port_type = VNET_DPDK_PORT_TYPE_ETH_40G;
              else
                xd->port_type = VNET_DPDK_PORT_TYPE_ETH_10G;
              break;

              /* Intel Red Rock Canyon */
            case VNET_DPDK_PMD_FM10K:
              xd->port_type = VNET_DPDK_PORT_TYPE_ETH_SWITCH;
              xd->port_conf.rxmode.hw_strip_crc = 1;
              break;

              /* virtio */
            case VNET_DPDK_PMD_VIRTIO:
              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->tx_conf.txq_flags |= ETH_TXQ_FLAGS_NOMULTSEGS;
              break;

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

            case VNET_DPDK_PMD_BOND:
              xd->port_type = VNET_DPDK_PORT_TYPE_ETH_BOND;
              xd->port_id = bond_ether_port_id++;
              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;

            default:
              xd->port_type = VNET_DPDK_PORT_TYPE_UNKNOWN;
            }

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

          if (devconf->num_tx_desc)
            xd->nb_tx_desc = devconf->num_tx_desc;
        }

      /*
       * 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.
       */
      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.
           */
          xd->port_conf.rxmode.max_rx_pkt_len = dev_info.max_rx_pktlen;
        }
      else
        {
          xd->port_conf.rxmode.max_rx_pkt_len = 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 ((dev_info.max_rx_pktlen >= (ETHERNET_MAX_PACKET_BYTES + 4)) &&
              xd->port_conf.rxmode.hw_strip_crc)
            {
              /*
               * Allow additional 4 bytes (for Ethernet FCS). These bytes are
               * stripped by h/w and so will not consume any buffer memory.
               */
              xd->port_conf.rxmode.max_rx_pkt_len += 4;
            }
        }

      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->device_index = xd - dm->devices;
      ASSERT (i == xd->device_index);
      xd->per_interface_next_index = ~0;

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

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

          if (devconf->hqos.hqos_thread_valid)
            {
              int cpu = dm->hqos_cpu_first_index + devconf->hqos.hqos_thread;

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

              vec_add2 (dm->devices_by_hqos_cpu[cpu], dq, 1);
              dq->device = xd->device_index;
              dq->queue_id = 0;
            }
          else
            {
              int cpu = dm->hqos_cpu_first_index + next_hqos_cpu;

              if (dm->hqos_cpu_count == 0)
                return clib_error_return (0, "no HQoS threads available");

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

              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;
            }
        }

      vec_validate_aligned (xd->tx_vectors, tm->n_vlib_mains,
                            CLIB_CACHE_LINE_BYTES);
      for (j = 0; j < tm->n_vlib_mains; j++)
        {
          vec_validate_ha (xd->tx_vectors[j], xd->nb_tx_desc,
                           sizeof (tx_ring_hdr_t), CLIB_CACHE_LINE_BYTES);
          vec_reset_length (xd->tx_vectors[j]);
        }

      vec_validate_aligned (xd->rx_vectors, xd->rx_q_used,
                            CLIB_CACHE_LINE_BYTES);
      for (j = 0; j < xd->rx_q_used; j++)
        {
          vec_validate_aligned (xd->rx_vectors[j], VLIB_FRAME_SIZE - 1,
                                CLIB_CACHE_LINE_BYTES);
          vec_reset_length (xd->rx_vectors[j]);
        }

      vec_validate_aligned (xd->d_trace_buffers, tm->n_vlib_mains,
                            CLIB_CACHE_LINE_BYTES);


      /* count the number of descriptors used for this device */
      nb_desc += xd->nb_rx_desc + xd->nb_tx_desc * xd->tx_q_used;

      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;

      sw = vnet_get_hw_sw_interface (dm->vnet_main, xd->hw_if_index);
      xd->vlib_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;
          /* *INDENT-OFF* */
          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);
          }));
          /* *INDENT-ON* */
        }
      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);
          }

      hi = vnet_get_hw_interface (dm->vnet_main, xd->hw_if_index);

      if (xd->flags & DPDK_DEVICE_FLAG_TX_OFFLOAD)
        hi->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD;

      dpdk_device_setup (xd);

      if (vec_len (xd->errors))
        clib_warning ("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;
        }

      /*
       * For cisco VIC vNIC, set default to VLAN strip enabled, unless
       * specified otherwise in the startup config.
       * For other NICs default to VLAN strip disabled, unless specified
       * otherwis in the startup config.
       */
      if (xd->pmd == VNET_DPDK_PMD_ENIC)
        {
          if (devconf->vlan_strip_offload != DPDK_DEVICE_VLAN_STRIP_OFF)
            vlan_strip = 1;     /* remove vlan tag from VIC port by default */
          else
            clib_warning ("VLAN strip disabled for interface\n");
        }
      else if (devconf->vlan_strip_offload == DPDK_DEVICE_VLAN_STRIP_ON)
        vlan_strip = 1;

      if (vlan_strip)
        {
          int vlan_off;
          vlan_off = rte_eth_dev_get_vlan_offload (xd->device_index);
          vlan_off |= ETH_VLAN_STRIP_OFFLOAD;
          xd->port_conf.rxmode.hw_vlan_strip = vlan_off;
          if (rte_eth_dev_set_vlan_offload (xd->device_index, vlan_off) == 0)
            clib_warning ("VLAN strip enabled for interface\n");
          else
            clib_warning ("VLAN strip cannot be supported by interface\n");
        }

      hi->max_l3_packet_bytes[VLIB_RX] = hi->max_l3_packet_bytes[VLIB_TX] =
        xd->port_conf.rxmode.max_rx_pkt_len - sizeof (ethernet_header_t);

      rte_eth_dev_set_mtu (xd->device_index, hi->max_packet_bytes);
    }

  if (nb_desc > dm->conf->num_mbufs)
    clib_warning ("%d mbufs allocated but total rx/tx ring size is %d\n",
                  dm->conf->num_mbufs, nb_desc);

  return 0;
}

static void
dpdk_bind_devices_to_uio (dpdk_config_main_t * conf)
{
  vlib_pci_main_t *pm = &pci_main;
  clib_error_t *error;
  vlib_pci_device_t *d;
  u8 *pci_addr = 0;
  int num_whitelisted = vec_len (conf->dev_confs);

  /* *INDENT-OFF* */
  pool_foreach (d, pm->pci_devs, ({
    dpdk_device_config_t * devconf = 0;
    vec_reset_length (pci_addr);
    pci_addr = format (pci_addr, "%U%c", format_vlib_pci_addr, &d->bus_address, 0);

    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, d->bus_address.as_u32);

        if (!p)
          continue;

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

    /* virtio */
    if (d->vendor_id == 0x1af4 && d->device_id == 0x1000)
      ;
    /* vmxnet3 */
    else if (d->vendor_id == 0x15ad && d->device_id == 0x07b0)
      ;
    /* 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 == 0x37c9 || d->device_id == 0x19e3))
      ;
    /* Cisco VIC */
    else if (d->vendor_id == 0x1137 && d->device_id == 0x0043)
      ;
    /* Chelsio T4/T5 */
    else if (d->vendor_id == 0x1425 && (d->device_id & 0xe000) == 0x4000)
      ;
    /* Mellanox  */
    else if (d->vendor_id == 0x15b3 && d->device_id >= 0x1013 && d->device_id <= 0x101a)
      {
        continue;
      }
    else
      {
        clib_warning ("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 (d, (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, d->bus_address.as_u32,
                      devconf - conf->dev_confs);
            devconf->pci_addr.as_u32 = d->bus_address.as_u32;
          }
        devconf->is_blacklisted = 1;
        clib_error_report (error);
      }
  }));
  /* *INDENT-ON* */
  vec_free (pci_addr);
}

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;
  dpdk_device_config_hqos_default (&devconf->hqos);

  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, "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
        {
          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 threadds must be "
                         "equal to number of rx queues", format_vlib_pci_addr,
                         &pci_addr);

  return error;
}

static clib_error_t *
dpdk_config (vlib_main_t * vm, unformat_input_t * input)
{
  clib_error_t *error = 0;
  dpdk_main_t *dm = &dpdk_main;
  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 x;
  u8 *s, *tmp = 0;
  u8 *rte_cmd = 0, *ethname = 0;
  u32 log_level;
  int ret, i;
  int num_whitelisted = 0;
  u8 no_pci = 0;
  u8 no_huge = 0;
  u8 huge_dir = 0;
  u8 file_prefix = 0;
  u8 *socket_mem = 0;
  u8 *huge_dir_path = 0;

  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));
  log_level = RTE_LOG_NOTICE;

  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");
          no_huge = 1;
        }

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

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

      else if (unformat (input, "log-level %U", unformat_dpdk_log_level, &x))
        log_level = x;

      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-mbufs %d", &conf->num_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, "poll-sleep %d", &dm->poll_sleep_usec))
        ;

#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, "huge-dir", 8))          \
              huge_dir = 1;                           \
            else 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, "uio_pci_generic%c", 0);

  /*
   * Use 1G huge pages if available.
   */
  if (!no_huge && !huge_dir)
    {
      u32 x, *mem_by_socket = 0;
      uword c = 0;
      u8 use_1g = 1;
      u8 use_2m = 1;
      u8 less_than_1g = 1;
      int rv;

      umount ((char *) huge_dir_path);

      /* Process "socket-mem" parameter value */
      if (vec_len (socket_mem))
        {
          unformat_input_t in;
          unformat_init_vector (&in, socket_mem);
          while (unformat_check_input (&in) != UNFORMAT_END_OF_INPUT)
            {
              if (unformat (&in, "%u,", &x))
                ;
              else if (unformat (&in, "%u", &x))
                ;
              else if (unformat (&in, ","))
                x = 0;
              else
                break;

              vec_add1 (mem_by_socket, x);

              if (x > 1023)
                less_than_1g = 0;
            }
          /* Note: unformat_free vec_frees(in.buffer), aka socket_mem... */
          unformat_free (&in);
          socket_mem = 0;
        }
      else
        {
          /* *INDENT-OFF* */
          clib_bitmap_foreach (c, tm->cpu_socket_bitmap, (
            {
              vec_validate(mem_by_socket, c);
              mem_by_socket[c] = 256; /* default per-socket mem */
            }
          ));
          /* *INDENT-ON* */
        }

      /* check if available enough 1GB pages for each socket */
      /* *INDENT-OFF* */
      clib_bitmap_foreach (c, tm->cpu_socket_bitmap, (
        {
          int pages_avail, page_size, mem;
          clib_error_t  *e = 0;

          vec_validate(mem_by_socket, c);
          mem = mem_by_socket[c];

          page_size = 1024;
          e = clib_sysfs_get_free_hugepages(c, page_size * 1024, &pages_avail);

          if (e != 0 || pages_avail < 0 || page_size * pages_avail < mem)
            use_1g = 0;

          if (e)
           clib_error_free (e);

          page_size = 2;
          e = clib_sysfs_get_free_hugepages(c, page_size * 1024, &pages_avail);

          if (e != 0 || pages_avail < 0 || page_size * pages_avail < mem)
            use_2m = 0;

          if (e)
           clib_error_free (e);
      }));
      /* *INDENT-ON* */

      if (mem_by_socket == 0)
        {
          error = clib_error_return (0, "mem_by_socket NULL");
          goto done;
        }
      _vec_len (mem_by_socket) = c + 1;

      /* regenerate socket_mem string */
      vec_foreach_index (x, mem_by_socket)
        socket_mem = format (socket_mem, "%s%u",
                             socket_mem ? "," : "", mem_by_socket[x]);
      socket_mem = format (socket_mem, "%c", 0);

      vec_free (mem_by_socket);

      error = vlib_unix_recursive_mkdir ((char *) huge_dir_path);
      if (error)
        {
          goto done;
        }

      if (use_1g && !(less_than_1g && use_2m))
        {
          rv = mount ("none", (char *) huge_dir_path, "hugetlbfs", 0,
                      "pagesize=1G");
        }
      else if (use_2m)
        {
          rv = mount ("none", (char *) huge_dir_path, "hugetlbfs", 0, NULL);
        }
      else
        {
          return clib_error_return (0, "not enough free huge pages");
        }

      if (rv)
        {
          error = clib_error_return (0, "mount failed %d", errno);
          goto done;
        }

      tmp = format (0, "--huge-dir%c", 0);
      vec_add1 (conf->eal_init_args, tmp);
      tmp = format (0, "%s%c", huge_dir_path, 0);
      vec_add1 (conf->eal_init_args, tmp);
      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);
        }
    }

  vec_free (rte_cmd);
  vec_free (ethname);

  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);
      conf->eal_init_args[4] = tmp;
    }

  if (no_pci == 0 && geteuid () == 0)
    dpdk_bind_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

    /* 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);

  /* set socket-mem */
  tmp = format (0, "--socket-mem%c", 0);
  vec_add1 (conf->eal_init_args, tmp);
  tmp = format (0, "%s%c", socket_mem, 0);
  vec_add1 (conf->eal_init_args, tmp);

  /* 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. */

  rte_log_set_global_level (log_level);

  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]);

  clib_warning ("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);

  /* Dump the physical memory layout prior to creating the mbuf_pool */
  fprintf (stdout, "DPDK physical memory layout:\n");
  rte_dump_physmem_layout (stdout);

  /* main thread 1st */
  error = dpdk_buffer_pool_create (vm, conf->num_mbufs, rte_socket_id ());
  if (error)
    return error;

  for (i = 0; i < RTE_MAX_LCORE; i++)
    {
      error = dpdk_buffer_pool_create (vm, conf->num_mbufs,
                                       rte_lcore_to_socket_id (i));
      if (error)
        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;
  memset (&xd->link, 0, sizeof (xd->link));
  rte_eth_link_get_nowait (xd->device_index, &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->vlib_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->flags & (DPDK_DEVICE_FLAG_ADMIN_UP | DPDK_DEVICE_FLAG_BOND_SLAVE))
      && ((xd->link.link_status != 0) ^
          vnet_hw_interface_is_link_up (vnm, xd->hw_if_index)))
    {
      hw_flags_chg = 1;
      hw_flags |= (xd->link.link_status ? VNET_HW_INTERFACE_FLAG_LINK_UP : 0);
    }

  if (hw_flags_chg || (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 (hw_flags_chg || (xd->link.link_speed != prev_link.link_speed))
    {
      hw_flags_chg = 1;
      switch (xd->link.link_speed)
        {
        case ETH_SPEED_NUM_10M:
          hw_flags |= VNET_HW_INTERFACE_FLAG_SPEED_10M;
          break;
        case ETH_SPEED_NUM_100M:
          hw_flags |= VNET_HW_INTERFACE_FLAG_SPEED_100M;
          break;
        case ETH_SPEED_NUM_1G:
          hw_flags |= VNET_HW_INTERFACE_FLAG_SPEED_1G;
          break;
        case ETH_SPEED_NUM_10G:
          hw_flags |= VNET_HW_INTERFACE_FLAG_SPEED_10G;
          break;
        case ETH_SPEED_NUM_40G:
          hw_flags |= VNET_HW_INTERFACE_FLAG_SPEED_40G;
          break;
        case 0:
          break;
        default:
          clib_warning ("unknown link speed %d", xd->link.link_speed);
          break;
        }
    }
  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->vlib_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;
  vnet_main_t *vnm = vnet_get_main ();
  dpdk_main_t *dm = &dpdk_main;
  ethernet_main_t *em = &ethernet_main;
  dpdk_device_t *xd;
  vlib_thread_main_t *tm = vlib_get_thread_main ();
  int i;

  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);
  }

  {
    /*
     * Extra set up for bond interfaces:
     *  1. Setup MACs for bond interfaces and their slave links which was set
     *     in dpdk_device_setup() but needs to be done again here to take
     *     effect.
     *  2. Set up info and register slave link state change callback handling.
     *  3. Set up info for bond interface related CLI support.
     */
    int nports = rte_eth_dev_count ();
    if (nports > 0)
      {
        for (i = 0; i < nports; i++)
          {
            xd = &dm->devices[i];
            ASSERT (i == xd->device_index);
            if (xd->pmd == VNET_DPDK_PMD_BOND)
              {
                u8 addr[6];
                u8 slink[16];
                int nlink = rte_eth_bond_slaves_get (i, slink, 16);
                if (nlink > 0)
                  {
                    vnet_hw_interface_t *bhi;
                    ethernet_interface_t *bei;
                    int rv;

                    /* Get MAC of 1st slave link */
                    rte_eth_macaddr_get
                      (slink[0], (struct ether_addr *) addr);

                    /* Set MAC of bounded interface to that of 1st slave link */
                    clib_warning ("Set MAC for bond port %d BondEthernet%d",
                                  i, xd->port_id);
                    rv = rte_eth_bond_mac_address_set
                      (i, (struct ether_addr *) addr);
                    if (rv)
                      clib_warning ("Set MAC addr failure rv=%d", rv);

                    /* Populate MAC of bonded interface in VPP hw tables */
                    bhi = vnet_get_hw_interface
                      (vnm, dm->devices[i].hw_if_index);
                    bei = pool_elt_at_index
                      (em->interfaces, bhi->hw_instance);
                    clib_memcpy (bhi->hw_address, addr, 6);
                    clib_memcpy (bei->address, addr, 6);

                    /* Init l3 packet size allowed on bonded interface */
                    bhi->max_packet_bytes = ETHERNET_MAX_PACKET_BYTES;
                    bhi->max_l3_packet_bytes[VLIB_RX] =
                      bhi->max_l3_packet_bytes[VLIB_TX] =
                      ETHERNET_MAX_PACKET_BYTES - sizeof (ethernet_header_t);
                    while (nlink >= 1)
                      {         /* for all slave links */
                        int slave = slink[--nlink];
                        dpdk_device_t *sdev = &dm->devices[slave];
                        vnet_hw_interface_t *shi;
                        vnet_sw_interface_t *ssi;
                        ethernet_interface_t *sei;
                        /* Add MAC to all slave links except the first one */
                        if (nlink)
                          {
                            clib_warning ("Add MAC for slave port %d", slave);
                            rv = rte_eth_dev_mac_addr_add
                              (slave, (struct ether_addr *) addr, 0);
                            if (rv)
                              clib_warning ("Add MAC addr failure rv=%d", rv);
                          }
                        /* Setup slave link state change callback handling */
                        rte_eth_dev_callback_register
                          (slave, RTE_ETH_EVENT_INTR_LSC,
                           dpdk_port_state_callback, NULL);
                        dpdk_device_t *sxd = &dm->devices[slave];
                        sxd->flags |= DPDK_DEVICE_FLAG_BOND_SLAVE;
                        sxd->bond_port = i;
                        /* Set slaves bitmap for bonded interface */
                        bhi->bond_info = clib_bitmap_set
                          (bhi->bond_info, sdev->hw_if_index, 1);
                        /* Set MACs and slave link flags on slave interface */
                        shi = vnet_get_hw_interface (vnm, sdev->hw_if_index);
                        ssi = vnet_get_sw_interface
                          (vnm, sdev->vlib_sw_if_index);
                        sei = pool_elt_at_index
                          (em->interfaces, shi->hw_instance);
                        shi->bond_info = VNET_HW_INTERFACE_BOND_INFO_SLAVE;
                        ssi->flags |= VNET_SW_INTERFACE_FLAG_BOND_SLAVE;
                        clib_memcpy (shi->hw_address, addr, 6);
                        clib_memcpy (sei->address, addr, 6);
                        /* Set l3 packet size allowed as the lowest of slave */
                        if (bhi->max_l3_packet_bytes[VLIB_RX] >
                            shi->max_l3_packet_bytes[VLIB_RX])
                          bhi->max_l3_packet_bytes[VLIB_RX] =
                            bhi->max_l3_packet_bytes[VLIB_TX] =
                            shi->max_l3_packet_bytes[VLIB_RX];
                        /* Set max packet size allowed as the lowest of slave */
                        if (bhi->max_packet_bytes > shi->max_packet_bytes)
                          bhi->max_packet_bytes = shi->max_packet_bytes;
                      }
                  }
              }
          }
      }
  }

  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;
  vlib_node_t *ei;
  clib_error_t *error = 0;
  vlib_thread_main_t *tm = vlib_get_thread_main ();

  /* 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");

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

  ei = vlib_get_node_by_name (vm, (u8 *) "ethernet-input");
  if (ei == 0)
    return clib_error_return (0, "ethernet-input node AWOL");

  dm->ethernet_input_node_index = ei->index;

  dm->conf->nchannels = 4;
  dm->conf->num_mbufs = dm->conf->num_mbufs ? dm->conf->num_mbufs : NB_MBUF;
  vec_add1 (dm->conf->eal_init_args, (u8 *) "vnet");

  vec_validate (dm->recycle, tm->n_thread_stacks - 1);

  /* 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;

  /* init CLI */
  if ((error = vlib_call_init_function (vm, dpdk_cli_init)))
    return error;

  return error;
}

VLIB_INIT_FUNCTION (dpdk_init);


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