/*
   * include/net/dsa.h - Driver for Distributed Switch Architecture switch chips

   * Copyright (c) 2008-2009 Marvell Semiconductor

   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation; either version 2 of the License, or
   * (at your option) any later version.
   */
  
  #ifndef __LINUX_NET_DSA_H
  #define __LINUX_NET_DSA_H

  #define DSA_MAX_SWITCHES	4
  #define DSA_MAX_PORTS		12
  
  struct dsa_chip_data {
  	/*
  	 * How to access the switch configuration registers.
  	 */
  	struct device	*mii_bus;
  	int		sw_addr;
  
  	/*
  	 * The names of the switch's ports.  Use "cpu" to
  	 * designate the switch port that the cpu is connected to,
  	 * "dsa" to indicate that this port is a DSA link to
  	 * another switch, NULL to indicate the port is unused,
  	 * or any other string to indicate this is a physical port.
  	 */
  	char		*port_names[DSA_MAX_PORTS];
  
  	/*
  	 * An array (with nr_chips elements) of which element [a]
  	 * indicates which port on this switch should be used to
  	 * send packets to that are destined for switch a.  Can be
  	 * NULL if there is only one switch chip.
  	 */
  	s8		*rtable;
  };

  
  struct dsa_platform_data {
  	/*
  	 * Reference to a Linux network interface that connects

  	 * to the root switch chip of the tree.

  	 */
  	struct device	*netdev;
  
  	/*

  	 * Info structs describing each of the switch chips
  	 * connected via this network interface.

  	 */

  	int		nr_chips;
  	struct dsa_chip_data	*chip;

  };

  extern bool dsa_uses_dsa_tags(void *dsa_ptr);

  extern bool dsa_uses_trailer_tags(void *dsa_ptr);

  
  #endif