/* * include/net/dsa.h - Driver for Distributed Switch Architecture switch chips * Copyright (c) 2008-2009 Marvell Semiconductor * * 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. */ #ifndef __LINUX_NET_DSA_H#define __LINUX_NET_DSA_H #include <linux/if_ether.h>#include <linux/list.h>#include <linux/timer.h>#include <linux/workqueue.h>#include <linux/of.h>#include <linux/phy.h>#include <linux/phy_fixed.h>#include <linux/ethtool.h> enum dsa_tag_protocol {	DSA_TAG_PROTO_NONE = 0,	DSA_TAG_PROTO_DSA,	DSA_TAG_PROTO_TRAILER,	DSA_TAG_PROTO_EDSA,	DSA_TAG_PROTO_BRCM,}; #define DSA_MAX_SWITCHES	4#define DSA_MAX_PORTS		12 struct dsa_chip_data {	/*	 * How to access the switch configuration registers.	 */	struct device	*host_dev;	int		sw_addr; 	/* set to size of eeprom if supported by the switch */	int		eeprom_len; 	/* Device tree node pointer for this specific switch chip	 * used during switch setup in case additional properties	 * and resources needs to be used	 */	struct device_node *of_node; 	/*	 * The names of the switch's ports.  Use "cpu" to	 * designate the switch port that the cpu is connected to,	 * "dsa" to indicate that this port is a DSA link to	 * another switch, NULL to indicate the port is unused,	 * or any other string to indicate this is a physical port.	 */	char		*port_names[DSA_MAX_PORTS];	struct device_node *port_dn[DSA_MAX_PORTS]; 	/*	 * An array (with nr_chips elements) of which element [a]	 * indicates which port on this switch should be used to	 * send packets to that are destined for switch a.  Can be	 * NULL if there is only one switch chip.	 */	s8		*rtable;}; struct dsa_platform_data {	/*	 * Reference to a Linux network interface that connects	 * to the root switch chip of the tree.	 */	struct device	*netdev;	struct net_device *of_netdev; 	/*	 * Info structs describing each of the switch chips	 * connected via this network interface.	 */	int		nr_chips;	struct dsa_chip_data	*chip;}; struct packet_type; struct dsa_switch_tree {	/*	 * Configuration data for the platform device that owns	 * this dsa switch tree instance.	 */	struct dsa_platform_data	*pd; 	/*	 * Reference to network device to use, and which tagging	 * protocol to use.	 */	struct net_device	*master_netdev;	int			(*rcv)(struct sk_buff *skb,				       struct net_device *dev,				       struct packet_type *pt,				       struct net_device *orig_dev);	enum dsa_tag_protocol	tag_protocol; 	/*	 * The switch and port to which the CPU is attached.	 */	s8			cpu_switch;	s8			cpu_port; 	/*	 * Link state polling.	 */	int			link_poll_needed;	struct work_struct	link_poll_work;	struct timer_list	link_poll_timer; 	/*	 * Data for the individual switch chips.	 */	struct dsa_switch	*ds[DSA_MAX_SWITCHES];}; struct dsa_switch {	/*	 * Parent switch tree, and switch index.	 */	struct dsa_switch_tree	*dst;	int			index; 	/*	 * Tagging protocol understood by this switch	 */	enum dsa_tag_protocol	tag_protocol; 	/*	 * Configuration data for this switch.	 */	struct dsa_chip_data	*pd; 	/*	 * The used switch driver.	 */	struct dsa_switch_driver	*drv; 	/*	 * Reference to host device to use.	 */	struct device		*master_dev; #ifdef CONFIG_NET_DSA_HWMON	/*	 * Hardware monitoring information	 */	char			hwmon_name[IFNAMSIZ + 8];	struct device		*hwmon_dev;#endif 	/*	 * Slave mii_bus and devices for the individual ports.	 */	u32			dsa_port_mask;	u32			phys_port_mask;	u32			phys_mii_mask;	struct mii_bus		*slave_mii_bus;	struct net_device	*ports[DSA_MAX_PORTS];}; static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p){	return !!(ds->index == ds->dst->cpu_switch && p == ds->dst->cpu_port);} static inline bool dsa_is_port_initialized(struct dsa_switch *ds, int p){	return ds->phys_port_mask & (1 << p) && ds->ports[p];} static inline u8 dsa_upstream_port(struct dsa_switch *ds){	struct dsa_switch_tree *dst = ds->dst; 	/*	 * If this is the root switch (i.e. the switch that connects	 * to the CPU), return the cpu port number on this switch.	 * Else return the (DSA) port number that connects to the	 * switch that is one hop closer to the cpu.	 */	if (dst->cpu_switch == ds->index)		return dst->cpu_port;	else		return ds->pd->rtable[dst->cpu_switch];} struct dsa_switch_driver {	struct list_head	list; 	enum dsa_tag_protocol	tag_protocol;	int			priv_size; 	/*	 * Probing and setup.	 */	char	*(*probe)(struct device *host_dev, int sw_addr);	int	(*setup)(struct dsa_switch *ds);	int	(*set_addr)(struct dsa_switch *ds, u8 *addr);	u32	(*get_phy_flags)(struct dsa_switch *ds, int port); 	/*	 * Access to the switch's PHY registers.	 */	int	(*phy_read)(struct dsa_switch *ds, int port, int regnum);	int	(*phy_write)(struct dsa_switch *ds, int port,			     int regnum, u16 val); 	/*	 * Link state polling and IRQ handling.	 */	void	(*poll_link)(struct dsa_switch *ds); 	/*	 * Link state adjustment (called from libphy)	 */	void	(*adjust_link)(struct dsa_switch *ds, int port,				struct phy_device *phydev);	void	(*fixed_link_update)(struct dsa_switch *ds, int port,				struct fixed_phy_status *st); 	/*	 * ethtool hardware statistics.	 */	void	(*get_strings)(struct dsa_switch *ds, int port, uint8_t *data);	void	(*get_ethtool_stats)(struct dsa_switch *ds,				     int port, uint64_t *data);	int	(*get_sset_count)(struct dsa_switch *ds); 	/*	 * ethtool Wake-on-LAN	 */	void	(*get_wol)(struct dsa_switch *ds, int port,			   struct ethtool_wolinfo *w);	int	(*set_wol)(struct dsa_switch *ds, int port,			   struct ethtool_wolinfo *w); 	/*	 * Suspend and resume	 */	int	(*suspend)(struct dsa_switch *ds);	int	(*resume)(struct dsa_switch *ds); 	/*	 * Port enable/disable	 */	int	(*port_enable)(struct dsa_switch *ds, int port,			       struct phy_device *phy);	void	(*port_disable)(struct dsa_switch *ds, int port,				struct phy_device *phy); 	/*	 * EEE setttings	 */	int	(*set_eee)(struct dsa_switch *ds, int port,			   struct phy_device *phydev,			   struct ethtool_eee *e);	int	(*get_eee)(struct dsa_switch *ds, int port,			   struct ethtool_eee *e); #ifdef CONFIG_NET_DSA_HWMON	/* Hardware monitoring */	int	(*get_temp)(struct dsa_switch *ds, int *temp);	int	(*get_temp_limit)(struct dsa_switch *ds, int *temp);	int	(*set_temp_limit)(struct dsa_switch *ds, int temp);	int	(*get_temp_alarm)(struct dsa_switch *ds, bool *alarm);#endif 	/* EEPROM access */	int	(*get_eeprom_len)(struct dsa_switch *ds);	int	(*get_eeprom)(struct dsa_switch *ds,			      struct ethtool_eeprom *eeprom, u8 *data);	int	(*set_eeprom)(struct dsa_switch *ds,			      struct ethtool_eeprom *eeprom, u8 *data); 	/*	 * Register access.	 */	int	(*get_regs_len)(struct dsa_switch *ds, int port);	void	(*get_regs)(struct dsa_switch *ds, int port,			    struct ethtool_regs *regs, void *p); 	/*	 * Bridge integration	 */	int	(*port_join_bridge)(struct dsa_switch *ds, int port,				    u32 br_port_mask);	int	(*port_leave_bridge)(struct dsa_switch *ds, int port,				     u32 br_port_mask);	int	(*port_stp_update)(struct dsa_switch *ds, int port,				   u8 state);	int	(*fdb_add)(struct dsa_switch *ds, int port,			   const unsigned char *addr, u16 vid);	int	(*fdb_del)(struct dsa_switch *ds, int port,			   const unsigned char *addr, u16 vid);	int	(*fdb_getnext)(struct dsa_switch *ds, int port,			       unsigned char *addr, bool *is_static);}; void register_switch_driver(struct dsa_switch_driver *type);void unregister_switch_driver(struct dsa_switch_driver *type);struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev); static inline void *ds_to_priv(struct dsa_switch *ds){	return (void *)(ds + 1);} static inline bool dsa_uses_tagged_protocol(struct dsa_switch_tree *dst){	return dst->rcv != NULL;}#endif