/*
 * 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.
 */

#define rte_mbuf_from_vlib_buffer(x) (((struct rte_mbuf *)x) - 1)
#define vlib_buffer_from_rte_mbuf(x) ((vlib_buffer_t *)(x+1))

#define DPDK_NB_RX_DESC_DEFAULT   1024
#define DPDK_NB_TX_DESC_DEFAULT   1024
#define DPDK_NB_RX_DESC_VIRTIO    256
#define DPDK_NB_TX_DESC_VIRTIO    256

#define I40E_DEV_ID_SFP_XL710           0x1572
#define I40E_DEV_ID_QSFP_A              0x1583
#define I40E_DEV_ID_QSFP_B              0x1584
#define I40E_DEV_ID_QSFP_C              0x1585
#define I40E_DEV_ID_10G_BASE_T          0x1586
#define I40E_DEV_ID_VF                  0x154C

/* These args appear by themselves */
#define foreach_eal_double_hyphen_predicate_arg \
_(no-shconf)                                    \
_(no-hpet)                                      \
_(no-huge)                                      \
_(vmware-tsc-map)

#define foreach_eal_single_hyphen_mandatory_arg \
_(coremask, c)                                  \
_(nchannels, n)                                 \

#define foreach_eal_single_hyphen_arg           \
_(blacklist, b)                                 \
_(mem-alloc-request, m)                         \
_(force-ranks, r)

/* These args are preceeded by "--" and followed by a single string */
#define foreach_eal_double_hyphen_arg           \
_(huge-dir)                                     \
_(proc-type)                                    \
_(file-prefix)                                  \
_(vdev)

typedef struct
{
  /* must be first */
  struct rte_pktmbuf_pool_private mbp_priv;
  u8 buffer_pool_index;
} dpdk_mempool_private_t;


static inline void
dpdk_get_xstats (dpdk_device_t * xd)
{
  int len;
  if ((len = rte_eth_xstats_get (xd->device_index, NULL, 0)) > 0)
    {
      vec_validate (xd->xstats, len - 1);
      vec_validate (xd->last_cleared_xstats, len - 1);

      len =
	rte_eth_xstats_get (xd->device_index, xd->xstats,
			    vec_len (xd->xstats));

      ASSERT (vec_len (xd->xstats) == len);
      ASSERT (vec_len (xd->last_cleared_xstats) == len);

      _vec_len (xd->xstats) = len;
      _vec_len (xd->last_cleared_xstats) = len;

    }
}


static inline void
dpdk_update_counters (dpdk_device_t * xd, f64 now)
{
  vlib_simple_counter_main_t *cm;
  vnet_main_t *vnm = vnet_get_main ();
  u32 thread_index = vlib_get_thread_index ();
  u64 rxerrors, last_rxerrors;

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

  xd->time_last_stats_update = now ? now : xd->time_last_stats_update;
  clib_memcpy (&xd->last_stats, &xd->stats, sizeof (xd->last_stats));
  rte_eth_stats_get (xd->device_index, &xd->stats);

  /* maybe bump interface rx no buffer counter */
  if (PREDICT_FALSE (xd->stats.rx_nombuf != xd->last_stats.rx_nombuf))
    {
      cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
			     VNET_INTERFACE_COUNTER_RX_NO_BUF);

      vlib_increment_simple_counter (cm, thread_index, xd->vlib_sw_if_index,
				     xd->stats.rx_nombuf -
				     xd->last_stats.rx_nombuf);
    }

  /* missed pkt counter */
  if (PREDICT_FALSE (xd->stats.imissed != xd->last_stats.imissed))
    {
      cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
			     VNET_INTERFACE_COUNTER_RX_MISS);

      vlib_increment_simple_counter (cm, thread_index, xd->vlib_sw_if_index,
				     xd->stats.imissed -
				     xd->last_stats.imissed);
    }
  rxerrors = xd->stats.ierrors;
  last_rxerrors = xd->last_stats.ierrors;

  if (PREDICT_FALSE (rxerrors != last_rxerrors))
    {
      cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
			     VNET_INTERFACE_COUNTER_RX_ERROR);

      vlib_increment_simple_counter (cm, thread_index, xd->vlib_sw_if_index,
				     rxerrors - last_rxerrors);
    }

  dpdk_get_xstats (xd);
}

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