devices.h

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/*
 * Copyright (c) 2016 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.
 */

#ifndef included_vnet_vnet_device_h
#define included_vnet_vnet_device_h

#include <vnet/unix/pcap.h>
#include <vnet/l3_types.h>

typedef enum
{
  VNET_DEVICE_INPUT_NEXT_IP4_NCS_INPUT,
  VNET_DEVICE_INPUT_NEXT_IP4_INPUT,
  VNET_DEVICE_INPUT_NEXT_IP6_INPUT,
  VNET_DEVICE_INPUT_NEXT_MPLS_INPUT,
  VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT,
  VNET_DEVICE_INPUT_NEXT_DROP,
  VNET_DEVICE_INPUT_N_NEXT_NODES,
} vnet_device_input_next_t;

#define VNET_DEVICE_INPUT_NEXT_NODES {                                  \
    [VNET_DEVICE_INPUT_NEXT_DROP] = "error-drop",                       \
    [VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT] = "ethernet-input",         \
    [VNET_DEVICE_INPUT_NEXT_IP4_NCS_INPUT] = "ip4-input-no-checksum",   \
    [VNET_DEVICE_INPUT_NEXT_IP4_INPUT] = "ip4-input",                   \
    [VNET_DEVICE_INPUT_NEXT_IP6_INPUT] = "ip6-input",                   \
    [VNET_DEVICE_INPUT_NEXT_MPLS_INPUT] = "mpls-input",                 \
}

typedef struct
{
  CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);

  /* total input packet counter */
  u64 aggregate_rx_packets;
} vnet_device_per_worker_data_t;

typedef struct
{
  vnet_device_per_worker_data_t *workers;
  uword first_worker_cpu_index;
  uword last_worker_cpu_index;
  uword next_worker_cpu_index;
} vnet_device_main_t;

typedef struct
{
  u32 hw_if_index;
  u32 dev_instance;
  u16 queue_id;
} vnet_device_and_queue_t;

typedef struct
{
  vnet_device_and_queue_t *devices_and_queues;
} vnet_device_input_runtime_t;

extern vnet_device_main_t vnet_device_main;
extern vlib_node_registration_t device_input_node;
extern const u32 device_input_next_node_advance[];

static inline void
vnet_set_device_input_node (u32 hw_if_index, u32 node_index)
{
  vnet_main_t *vnm = vnet_get_main ();
  vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
  hw->input_node_index = node_index;
}

void vnet_device_input_assign_thread (u32 hw_if_index, u16 queue_id,
                                      uword cpu_index);

static inline u64
vnet_get_aggregate_rx_packets (void)
{
  vnet_device_main_t *vdm = &vnet_device_main;
  u64 sum = 0;
  vnet_device_per_worker_data_t *pwd;

  vec_foreach (pwd, vdm->workers) sum += pwd->aggregate_rx_packets;

  return sum;
}

static inline void
vnet_device_increment_rx_packets (u32 cpu_index, u64 count)
{
  vnet_device_main_t *vdm = &vnet_device_main;
  vnet_device_per_worker_data_t *pwd;

  pwd = vec_elt_at_index (vdm->workers, cpu_index);
  pwd->aggregate_rx_packets += count;
}

static_always_inline vnet_device_and_queue_t *
vnet_get_device_and_queue (vlib_main_t * vm, vlib_node_runtime_t * node)
{
  vnet_device_input_runtime_t *rt = (void *) node->runtime_data;
  return rt->devices_and_queues;
}

static_always_inline void
vnet_device_input_set_interrupt_pending (vnet_main_t * vnm, u32 hw_if_index,
                                         u16 queue_id)
{
  vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);

  ASSERT (queue_id < vec_len (hw->input_node_cpu_index_by_queue));
  u32 cpu_index = hw->input_node_cpu_index_by_queue[queue_id];
  vlib_node_set_interrupt_pending (vlib_mains[cpu_index],
                                   hw->input_node_index);
}

#endif /* included_vnet_vnet_device_h */

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