switch.h

/*
 * Copyright (C) 2016-2017, 2020, 2022-2024 Kernkonzept GmbH.
 * Author(s): Jean Wolter <jean.wolter@kernkonzept.com>
 *            Alexander Warg <warg@os.inf.tu-dresden.de>
 *
 * License: see LICENSE.spdx (in this directory or the directories above)
 */
#pragma once
 
#include "port.h"
#include "mac_table.h"
 
class Virtio_switch
{
private:
  Virtio_port **_ports;  
  Virtio_port *_monitor; 
  unsigned _max_ports;
  unsigned _max_used;
  Mac_table<> _mac_table;
 
  int lookup_free_slot();
 
  void handle_tx_queue(Virtio_port *port);
 
 
  void all_kick_emit_enable()
  {
    for (unsigned idx = 0; idx < _max_ports; ++idx)
      if (_ports[idx])
        _ports[idx]->kick_emit_and_enable();
  }
 
  void all_kick_disable_remember()
  {
    for (unsigned idx = 0; idx < _max_ports; ++idx)
      if (_ports[idx])
        _ports[idx]->kick_disable_and_remember();
  }
 
public:
  explicit Virtio_switch(unsigned max_ports);
 
  bool add_port(Virtio_port *port);
 
  bool add_monitor_port(Virtio_port *port);
 
  void check_ports();
 
  void handle_port_irq(Virtio_port *port);
 
  int port_available(bool monitor)
  {
    if (monitor)
      return !_monitor ? 0 : -1;
 
    return lookup_free_slot();
  }
};