/* * 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 #include #include #include #include #include #include #include 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); /* * VLAN support */ int (*port_pvid_get)(struct dsa_switch *ds, int port, u16 *pvid); int (*port_pvid_set)(struct dsa_switch *ds, int port, u16 pvid); int (*port_vlan_add)(struct dsa_switch *ds, int port, u16 vid, bool untagged); int (*port_vlan_del)(struct dsa_switch *ds, int port, u16 vid); int (*vlan_getnext)(struct dsa_switch *ds, u16 *vid, unsigned long *ports, unsigned long *untagged); /* * Forwarding database */ int (*port_fdb_add)(struct dsa_switch *ds, int port, const unsigned char *addr, u16 vid); int (*port_fdb_del)(struct dsa_switch *ds, int port, const unsigned char *addr, u16 vid); int (*port_fdb_getnext)(struct dsa_switch *ds, int port, unsigned char *addr, u16 *vid, 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