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/*
  Copyright (c) 2001, 2002, 2003 Eliot Dresselhaus

  Permission is hereby granted, free of charge, to any person obtaining
  a copy of this software and associated documentation files (the
  "Software"), to deal in the Software without restriction, including
  without limitation the rights to use, copy, modify, merge, publish,
  distribute, sublicense, and/or sell copies of the Software, and to
  permit persons to whom the Software is furnished to do so, subject to
  the following conditions:

  The above copyright notice and this permission notice shall be
  included in all copies or substantial portions of the Software.

  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/

#ifndef included_timer_h
#define included_timer_h

#include <signal.h>

typedef void (timer_func_t) (any arg, f64 delay);

/* Arrange for function to be called after time interval (in seconds) has elapsed. */
extern void timer_call (timer_func_t * func, any arg, f64 time_interval);

/* Block/unblock timer interrupts. */
extern void timer_block (sigset_t * save);
extern void timer_unblock (sigset_t * save);

#endif /* included_timer_h */

/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */
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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 funciton 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", sys_cache_dir, dp->d_name, "level");
	  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 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 ();
  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;
  u8 bond_ether_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 ports...");
    }

  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];
      u8 vlan_strip = 0;
      struct rte_eth_dev_info dev_info;
      struct rte_pci_device *pci_dev;
      struct rte_eth_link l;
      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_link_get_nowait (i, &l);
      rte_eth_dev_info_get (i, &dev_info);

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

      pci_dev = dpdk_get_pci_device (&dev_info);

      if (pci_dev)	/* bonded interface has no pci info */
	{
	  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;
	      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:
	      xd->port_type = port_type_from_link_speed (l.link_speed);
	      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_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_BOND:
	      xd->port_type = VNET_DPDK_PORT_TYPE_ETH_BOND;
	      xd->bond_instance_num = bond_ether_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:
	      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;
	}

      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;

      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.
       */
      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->port_id);
	  vlan_off |= ETH_VLAN_STRIP_OFFLOAD;
          if (vlan_off)
	    xd->port_conf.rxmode.offloads |= DEV_RX_OFFLOAD_VLAN_STRIP;
	  else
	    xd->port_conf.rxmode.offloads &= ~DEV_RX_OFFLOAD_VLAN_STRIP;
	  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");
	}

      if (hi)
	hi->max_packet_bytes = xd->port_conf.rxmode.max_rx_pkt_len
	  - sizeof (ethernet_header_t);
      else
	clib_warning ("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 == 0x37c9 || d->device_id == 0x19e3))
      ;
    /* 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)
      ;
    /* Amazen 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;
#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
	{
	  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);
      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

    /* 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]);

  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->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 (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 (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;
  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;
  int j;

  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_avail ();
    if (nports > 0)
      {
	/* *INDENT-OFF* */
	RTE_ETH_FOREACH_DEV(i)
	  {
	    xd = NULL;
	    for (j = 0; j < nports; j++)
	      {
		if (dm->devices[j].port_id == i)
		  {
		    xd = &dm->devices[j];
		  }
	      }
	    if (xd != NULL && xd->pmd == VNET_DPDK_PMD_BOND)
	      {
		u8 addr[6];
		dpdk_portid_t 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 */
		    dpdk_log_info ("Set MAC for bond port %d BondEthernet%d",
				   i, xd->bond_instance_num);
		    rv = rte_eth_bond_mac_address_set
		      (i, (struct ether_addr *) addr);
		    if (rv)
		      dpdk_log_warn ("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;
		    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)
			  {
			    dpdk_log_info ("Add MAC for slave port %d",
					   slave);
			    rv = rte_eth_dev_mac_addr_add
			      (slave, (struct ether_addr *) addr, 0);
			    if (rv)
			      dpdk_log_warn ("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->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_packet_bytes > shi->max_packet_bytes)
			  bhi->max_packet_bytes = shi->max_packet_bytes;
		      }
		  }
	      }
	  }
	/* *INDENT-ON* */
      }
  }

  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:
 */