LXR linux/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
  17struct 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
  42struct 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
  57extern bool dsa_uses_dsa_tags(void *dsa_ptr);
  58extern bool dsa_uses_trailer_tags(void *dsa_ptr);
  59
  60
  61#endif
  62