/*
 * switch.h: Switch configuration API
 *
 * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#ifndef __LINUX_SWITCH_H
#define __LINUX_SWITCH_H

#include <linux/types.h>
#include <linux/netdevice.h>
#include <linux/netlink.h>
#include <linux/genetlink.h>
#ifndef __KERNEL__
#include <netlink/netlink.h>
#include <netlink/genl/genl.h>
#include <netlink/genl/ctrl.h>
#else
#include <net/genetlink.h>
#endif

/* main attributes */
enum {
	SWITCH_ATTR_UNSPEC,
	/* global */
	SWITCH_ATTR_TYPE,
	/* device */
	SWITCH_ATTR_ID,
	SWITCH_ATTR_DEV_NAME,
	SWITCH_ATTR_ALIAS,
	SWITCH_ATTR_NAME,
	SWITCH_ATTR_VLANS,
	SWITCH_ATTR_PORTS,
	SWITCH_ATTR_CPU_PORT,
	/* attributes */
	SWITCH_ATTR_OP_ID,
	SWITCH_ATTR_OP_TYPE,
	SWITCH_ATTR_OP_NAME,
	SWITCH_ATTR_OP_PORT,
	SWITCH_ATTR_OP_VLAN,
	SWITCH_ATTR_OP_REG,
	SWITCH_ATTR_OP_VALUE_INT,
	SWITCH_ATTR_OP_VALUE_STR,
	SWITCH_ATTR_OP_VALUE_PORTS,
	SWITCH_ATTR_OP_VALUE_EXT,
	SWITCH_ATTR_OP_DESCRIPTION,
	/* port lists */
	SWITCH_ATTR_PORT,
	/* switch_ext attribute */
	SWITCH_ATTR_EXT,
	SWITCH_ATTR_MAX
};

/* commands */
enum {
	SWITCH_CMD_UNSPEC,
	SWITCH_CMD_GET_SWITCH,
	SWITCH_CMD_NEW_ATTR,
	SWITCH_CMD_LIST_GLOBAL,
	SWITCH_CMD_GET_GLOBAL,
	SWITCH_CMD_SET_GLOBAL,
	SWITCH_CMD_LIST_PORT,
	SWITCH_CMD_GET_PORT,
	SWITCH_CMD_SET_PORT,
	SWITCH_CMD_LIST_VLAN,
	SWITCH_CMD_GET_VLAN,
	SWITCH_CMD_SET_VLAN,
	SWITCH_CMD_LIST_REG,
	SWITCH_CMD_GET_REG,
	SWITCH_CMD_SET_REG,
};

/* data types */
enum switch_val_type {
	SWITCH_TYPE_UNSPEC,
	SWITCH_TYPE_INT,
	SWITCH_TYPE_STRING,
	SWITCH_TYPE_PORTS,
	SWITCH_TYPE_EXT,
	SWITCH_TYPE_NOVAL,
};

/* port nested attributes */
enum {
	SWITCH_PORT_UNSPEC,
	SWITCH_PORT_ID,
	SWITCH_PORT_FLAG_TAGGED,
	SWITCH_PORT_ATTR_MAX
};

/* switch_ext nested attributes */
enum {
	SWITCH_EXT_UNSPEC,
	SWITCH_EXT_NAME,
	SWITCH_EXT_VALUE,
	SWITCH_EXT_ATTR_MAX
};

#define SWITCH_ATTR_DEFAULTS_OFFSET	0x1000

#ifdef __KERNEL__

struct switch_dev;
struct switch_op;
struct switch_val;
struct switch_attr;
struct switch_attrlist;
struct switch_led_trigger;

int register_switch(struct switch_dev *dev, struct net_device *netdev);
void unregister_switch(struct switch_dev *dev);

/**
 * struct switch_attrlist - attribute list
 *
 * @n_attr: number of attributes
 * @attr: pointer to the attributes array
 */
struct switch_attrlist {
	int n_attr;
	const struct switch_attr *attr;
};

enum switch_port_speed {
	SWITCH_PORT_SPEED_UNKNOWN = 0,
	SWITCH_PORT_SPEED_10 = 10,
	SWITCH_PORT_SPEED_100 = 100,
	SWITCH_PORT_SPEED_1000 = 1000,
};

struct switch_port_link {
	bool link;
	bool duplex;
	bool aneg;
	bool tx_flow;
	bool rx_flow;
	enum switch_port_speed speed;
};

struct switch_port_stats {
	unsigned long tx_bytes;
	unsigned long rx_bytes;
};

/**
 * struct switch_dev_ops - switch driver operations
 *
 * @attr_global: global switch attribute list
 * @attr_port: port attribute list
 * @attr_vlan: vlan attribute list
 *
 * Callbacks:
 *
 * @get_vlan_ports: read the port list of a VLAN
 * @set_vlan_ports: set the port list of a VLAN
 *
 * @get_port_pvid: get the primary VLAN ID of a port
 * @set_port_pvid: set the primary VLAN ID of a port
 *
 * @apply_config: apply all changed settings to the switch
 * @reset_switch: resetting the switch
 */
struct switch_dev_ops {
	struct switch_attrlist attr_global, attr_port, attr_vlan;
	struct switch_attrlist attr_reg;

	int (*get_reg_val)(struct switch_dev *dev, int reg, int *val);
	int (*set_reg_val)(struct switch_dev *dev, int reg, int val);

	int (*get_vlan_ports)(struct switch_dev *dev, struct switch_val *val);
	int (*set_vlan_ports)(struct switch_dev *dev, struct switch_val *val);

	int (*get_port_pvid)(struct switch_dev *dev, int port, int *val);
	int (*set_port_pvid)(struct switch_dev *dev, int port, int val);

	int (*apply_config)(struct switch_dev *dev);
	int (*reset_switch)(struct switch_dev *dev);

	int (*get_port_link)(struct switch_dev *dev, int port,
			     struct switch_port_link *link);
	int (*get_port_stats)(struct switch_dev *dev, int port,
			      struct switch_port_stats *stats);
};

struct switch_dev {
	const struct switch_dev_ops *ops;
	/* will be automatically filled */
	char devname[IFNAMSIZ];

	const char *name;
	/* NB: either alias or netdev must be set */
	const char *alias;
	struct net_device *netdev;

	int ports;
	int vlans;
	int cpu_port;

	/* the following fields are internal for swconfig */
	int id;
	struct list_head dev_list;
	unsigned long def_global, def_port, def_vlan;
	unsigned long def_reg;

	struct mutex sw_mutex;
	struct switch_port *portbuf;

	char buf[128];

#ifdef CONFIG_SWCONFIG_LEDS
	struct switch_led_trigger *led_trigger;
#endif
};

struct switch_port {
	u32 id;
	u32 flags;
};

struct switch_ext {
	const char *option_name;
	const char *option_value;
	struct switch_ext *next;
};

struct switch_val {
	const struct switch_attr *attr;
	int port_vlan;
	int len;
	union {
		const char *s;
		u32 i;
		struct switch_port *ports;
		struct switch_ext *ext_val;
	} value;
};

struct switch_attr {
	int disabled;
	int type;
	const char *name;
	const char *description;

	int (*set)(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val);
	int (*get)(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val);

	/* for driver internal use */
	int id;
	int ofs;
	int max;
};

#endif

#endif