net/dsa/dsa_priv.h

   1 /*
   2  * net/dsa/dsa_priv.h - Hardware switch handling
   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 __DSA_PRIV_H
  12 #define __DSA_PRIV_H
  13
  14 #include <linux/list.h>
  15 #include <linux/phy.h>
  16 #include <linux/timer.h>
  17 #include <linux/workqueue.h>
  18 #include <net/dsa.h>
  19
  20 struct dsa_switch {
  21         /*
  22          * Parent switch tree, and switch index.
  23          */
  24         struct dsa_switch_tree  *dst;
  25         int                     index;
  26
  27         /*
  28          * Configuration data for this switch.
  29          */
  30         struct dsa_chip_data    *pd;
  31
  32         /*
  33          * The used switch driver.
  34          */
  35         struct dsa_switch_driver        *drv;
  36
  37         /*
  38          * Reference to mii bus to use.
  39          */
  40         struct mii_bus          *master_mii_bus;
  41
  42         /*
  43          * Slave mii_bus and devices for the individual ports.
  44          */
  45         u32                     dsa_port_mask;
  46         u32                     phys_port_mask;
  47         struct mii_bus          *slave_mii_bus;
  48         struct net_device       *ports[DSA_MAX_PORTS];
  49 };
  50
  51 static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p)
  52 {
  53         return !!(ds->index == ds->dst->cpu_switch && p == ds->dst->cpu_port);
  54 }
  55
  56 static inline u8 dsa_upstream_port(struct dsa_switch *ds)
  57 {
  58         struct dsa_switch_tree *dst = ds->dst;
  59
  60         /*
  61          * If this is the root switch (i.e. the switch that connects
  62          * to the CPU), return the cpu port number on this switch.
  63          * Else return the (DSA) port number that connects to the
  64          * switch that is one hop closer to the cpu.
  65          */
  66         if (dst->cpu_switch == ds->index)
  67                 return dst->cpu_port;
  68         else
  69                 return ds->pd->rtable[dst->cpu_switch];
  70 }
  71
  72 struct dsa_slave_priv {
  73         /*
  74          * The linux network interface corresponding to this
  75          * switch port.
  76          */
  77         struct net_device       *dev;
  78
  79         /*
  80          * Which switch this port is a part of, and the port index
  81          * for this port.
  82          */
  83         struct dsa_switch       *parent;
  84         u8                      port;
  85
  86         /*
  87          * The phylib phy_device pointer for the PHY connected
  88          * to this port.
  89          */
  90         struct phy_device       *phy;
  91 };
  92
  93 struct dsa_switch_driver {
  94         struct list_head        list;
  95
  96         __be16                  tag_protocol;
  97         int                     priv_size;
  98
  99         /*
 100          * Probing and setup.
 101          */
 102         char    *(*probe)(struct mii_bus *bus, int sw_addr);
 103         int     (*setup)(struct dsa_switch *ds);
 104         int     (*set_addr)(struct dsa_switch *ds, u8 *addr);
 105
 106         /*
 107          * Access to the switch's PHY registers.
 108          */
 109         int     (*phy_read)(struct dsa_switch *ds, int port, int regnum);
 110         int     (*phy_write)(struct dsa_switch *ds, int port,
 111                              int regnum, u16 val);
 112
 113         /*
 114          * Link state polling and IRQ handling.
 115          */
 116         void    (*poll_link)(struct dsa_switch *ds);
 117
 118         /*
 119          * ethtool hardware statistics.
 120          */
 121         void    (*get_strings)(struct dsa_switch *ds, int port, uint8_t *data);
 122         void    (*get_ethtool_stats)(struct dsa_switch *ds,
 123                                      int port, uint64_t *data);
 124         int     (*get_sset_count)(struct dsa_switch *ds);
 125 };
 126
 127 /* dsa.c */
 128 extern char dsa_driver_version[];
 129 void register_switch_driver(struct dsa_switch_driver *type);
 130 void unregister_switch_driver(struct dsa_switch_driver *type);
 131
 132 /* slave.c */
 133 void dsa_slave_mii_bus_init(struct dsa_switch *ds);
 134 struct net_device *dsa_slave_create(struct dsa_switch *ds,
 135                                     struct device *parent,
 136                                     int port, char *name);
 137
 138 /* tag_dsa.c */
 139 netdev_tx_t dsa_xmit(struct sk_buff *skb, struct net_device *dev);
 140
 141 /* tag_edsa.c */
 142 netdev_tx_t edsa_xmit(struct sk_buff *skb, struct net_device *dev);
 143
 144 /* tag_trailer.c */
 145 netdev_tx_t trailer_xmit(struct sk_buff *skb, struct net_device *dev);
 146
 147
 148 #endif