include/net/dsa.h

   1 /*
   2  * include/net/dsa.h - Driver for Distributed Switch Architecture switch chips
   3  * Copyright (c) 2008-2009 Marvell Semiconductor
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  */
  10
  11 #ifndef __LINUX_NET_DSA_H
  12 #define __LINUX_NET_DSA_H
  13
  14 #define DSA_MAX_SWITCHES        4
  15 #define DSA_MAX_PORTS           12
  16
  17 struct dsa_chip_data {
  18         /*
  19          * How to access the switch configuration registers.
  20          */
  21         struct device   *mii_bus;
  22         int             sw_addr;
  23
  24         /*
  25          * The names of the switch's ports.  Use "cpu" to
  26          * designate the switch port that the cpu is connected to,
  27          * "dsa" to indicate that this port is a DSA link to
  28          * another switch, NULL to indicate the port is unused,
  29          * or any other string to indicate this is a physical port.
  30          */
  31         char            *port_names[DSA_MAX_PORTS];
  32
  33         /*
  34          * An array (with nr_chips elements) of which element [a]
  35          * indicates which port on this switch should be used to
  36          * send packets to that are destined for switch a.  Can be
  37          * NULL if there is only one switch chip.
  38          */
  39         s8              *rtable;
  40 };
  41
  42 struct dsa_platform_data {
  43         /*
  44          * Reference to a Linux network interface that connects
  45          * to the root switch chip of the tree.
  46          */
  47         struct device   *netdev;
  48
  49         /*
  50          * Info structs describing each of the switch chips
  51          * connected via this network interface.
  52          */
  53         int             nr_chips;
  54         struct dsa_chip_data    *chip;
  55 };
  56
  57 extern bool dsa_uses_dsa_tags(void *dsa_ptr);
  58 extern bool dsa_uses_trailer_tags(void *dsa_ptr);
  59
  60
  61 #endif