target/linux/generic/files/include/linux/switch.h

   1 /*
   2  * switch.h: Switch configuration API
   3  *
   4  * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version 2
   9  * of the License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  */
  16
  17 #ifndef __LINUX_SWITCH_H
  18 #define __LINUX_SWITCH_H
  19
  20 #include <linux/types.h>
  21 #include <linux/netdevice.h>
  22 #include <linux/netlink.h>
  23 #include <linux/genetlink.h>
  24 #ifndef __KERNEL__
  25 #include <netlink/netlink.h>
  26 #include <netlink/genl/genl.h>
  27 #include <netlink/genl/ctrl.h>
  28 #else
  29 #include <net/genetlink.h>
  30 #endif
  31
  32 /* main attributes */
  33 enum {
  34         SWITCH_ATTR_UNSPEC,
  35         /* global */
  36         SWITCH_ATTR_TYPE,
  37         /* device */
  38         SWITCH_ATTR_ID,
  39         SWITCH_ATTR_NAME,
  40         SWITCH_ATTR_DEV_NAME,
  41         SWITCH_ATTR_VLANS,
  42         SWITCH_ATTR_PORTS,
  43         SWITCH_ATTR_CPU_PORT,
  44         /* attributes */
  45         SWITCH_ATTR_OP_ID,
  46         SWITCH_ATTR_OP_TYPE,
  47         SWITCH_ATTR_OP_NAME,
  48         SWITCH_ATTR_OP_PORT,
  49         SWITCH_ATTR_OP_VLAN,
  50         SWITCH_ATTR_OP_VALUE_INT,
  51         SWITCH_ATTR_OP_VALUE_STR,
  52         SWITCH_ATTR_OP_VALUE_PORTS,
  53         SWITCH_ATTR_OP_DESCRIPTION,
  54         /* port lists */
  55         SWITCH_ATTR_PORT,
  56         SWITCH_ATTR_MAX
  57 };
  58
  59 /* commands */
  60 enum {
  61         SWITCH_CMD_UNSPEC,
  62         SWITCH_CMD_GET_SWITCH,
  63         SWITCH_CMD_NEW_ATTR,
  64         SWITCH_CMD_LIST_GLOBAL,
  65         SWITCH_CMD_GET_GLOBAL,
  66         SWITCH_CMD_SET_GLOBAL,
  67         SWITCH_CMD_LIST_PORT,
  68         SWITCH_CMD_GET_PORT,
  69         SWITCH_CMD_SET_PORT,
  70         SWITCH_CMD_LIST_VLAN,
  71         SWITCH_CMD_GET_VLAN,
  72         SWITCH_CMD_SET_VLAN
  73 };
  74
  75 /* data types */
  76 enum switch_val_type {
  77         SWITCH_TYPE_UNSPEC,
  78         SWITCH_TYPE_INT,
  79         SWITCH_TYPE_STRING,
  80         SWITCH_TYPE_PORTS,
  81         SWITCH_TYPE_NOVAL,
  82 };
  83
  84 /* port nested attributes */
  85 enum {
  86         SWITCH_PORT_UNSPEC,
  87         SWITCH_PORT_ID,
  88         SWITCH_PORT_FLAG_TAGGED,
  89         SWITCH_PORT_ATTR_MAX
  90 };
  91
  92 #define SWITCH_ATTR_DEFAULTS_OFFSET     0x1000
  93
  94 #ifdef __KERNEL__
  95
  96 struct switch_dev;
  97 struct switch_op;
  98 struct switch_val;
  99 struct switch_attr;
 100 struct switch_attrlist;
 101
 102 int register_switch(struct switch_dev *dev, struct net_device *netdev);
 103 void unregister_switch(struct switch_dev *dev);
 104
 105 /**
 106  * struct switch_attrlist - attribute list
 107  *
 108  * @n_attr: number of attributes
 109  * @attr: pointer to the attributes array
 110  */
 111 struct switch_attrlist {
 112         int n_attr;
 113         const struct switch_attr *attr;
 114 };
 115
 116 /**
 117  * struct switch_dev_ops - switch driver operations
 118  *
 119  * @attr_global: global switch attribute list
 120  * @attr_port: port attribute list
 121  * @attr_vlan: vlan attribute list
 122  *
 123  * Callbacks:
 124  *
 125  * @get_vlan_ports: read the port list of a VLAN
 126  * @set_vlan_ports: set the port list of a VLAN
 127  *
 128  * @get_port_pvid: get the primary VLAN ID of a port
 129  * @set_port_pvid: set the primary VLAN ID of a port
 130  *
 131  * @apply_config: apply all changed settings to the switch
 132  * @reset_switch: resetting the switch
 133  */
 134 struct switch_dev_ops {
 135         struct switch_attrlist attr_global, attr_port, attr_vlan;
 136
 137         int (*get_vlan_ports)(struct switch_dev *dev, struct switch_val *val);
 138         int (*set_vlan_ports)(struct switch_dev *dev, struct switch_val *val);
 139
 140         int (*get_port_pvid)(struct switch_dev *dev, int port, int *val);
 141         int (*set_port_pvid)(struct switch_dev *dev, int port, int val);
 142
 143         int (*apply_config)(struct switch_dev *dev);
 144         int (*reset_switch)(struct switch_dev *dev);
 145 };
 146
 147 struct switch_dev {
 148         const struct switch_dev_ops *ops;
 149         const char *name;
 150
 151         /* NB: either devname or netdev must be set */
 152         const char *devname;
 153         struct net_device *netdev;
 154
 155         int ports;
 156         int vlans;
 157         int cpu_port;
 158
 159         /* the following fields are internal for swconfig */
 160         int id;
 161         struct list_head dev_list;
 162         unsigned long def_global, def_port, def_vlan;
 163
 164         spinlock_t lock;
 165         struct switch_port *portbuf;
 166 };
 167
 168 struct switch_port {
 169         u32 id;
 170         u32 flags;
 171 };
 172
 173 struct switch_val {
 174         const struct switch_attr *attr;
 175         int port_vlan;
 176         int len;
 177         union {
 178                 const char *s;
 179                 u32 i;
 180                 struct switch_port *ports;
 181         } value;
 182 };
 183
 184 struct switch_attr {
 185         int disabled;
 186         int type;
 187         const char *name;
 188         const char *description;
 189
 190         int (*set)(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val);
 191         int (*get)(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val);
 192
 193         /* for driver internal use */
 194         int id;
 195         int ofs;
 196         int max;
 197 };
 198
 199 #endif
 200
 201 #endif