| /* |
| * 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/of_gpio.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; |
| |
| /* |
| * A switch may have a GPIO line tied to its reset pin. Parse |
| * this from the device tree, and use it before performing |
| * switch soft reset. |
| */ |
| struct gpio_desc *reset; |
| }; |
| |
| 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; |
| |
| /* |
| * 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_dsa_port(struct dsa_switch *ds, int p) |
| { |
| return !!((ds->dsa_port_mask) & (1 << p)); |
| } |
| |
| 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 switchdev_trans; |
| struct switchdev_obj; |
| struct switchdev_obj_port_fdb; |
| struct switchdev_obj_port_vlan; |
| |
| 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 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_bridge_join)(struct dsa_switch *ds, int port, |
| struct net_device *bridge); |
| void (*port_bridge_leave)(struct dsa_switch *ds, int port); |
| int (*port_stp_update)(struct dsa_switch *ds, int port, |
| u8 state); |
| |
| /* |
| * VLAN support |
| */ |
| int (*port_vlan_filtering)(struct dsa_switch *ds, int port, |
| bool vlan_filtering); |
| int (*port_vlan_prepare)(struct dsa_switch *ds, int port, |
| const struct switchdev_obj_port_vlan *vlan, |
| struct switchdev_trans *trans); |
| int (*port_vlan_add)(struct dsa_switch *ds, int port, |
| const struct switchdev_obj_port_vlan *vlan, |
| struct switchdev_trans *trans); |
| int (*port_vlan_del)(struct dsa_switch *ds, int port, |
| const struct switchdev_obj_port_vlan *vlan); |
| int (*port_vlan_dump)(struct dsa_switch *ds, int port, |
| struct switchdev_obj_port_vlan *vlan, |
| int (*cb)(struct switchdev_obj *obj)); |
| |
| /* |
| * Forwarding database |
| */ |
| int (*port_fdb_prepare)(struct dsa_switch *ds, int port, |
| const struct switchdev_obj_port_fdb *fdb, |
| struct switchdev_trans *trans); |
| int (*port_fdb_add)(struct dsa_switch *ds, int port, |
| const struct switchdev_obj_port_fdb *fdb, |
| struct switchdev_trans *trans); |
| int (*port_fdb_del)(struct dsa_switch *ds, int port, |
| const struct switchdev_obj_port_fdb *fdb); |
| int (*port_fdb_dump)(struct dsa_switch *ds, int port, |
| struct switchdev_obj_port_fdb *fdb, |
| int (*cb)(struct switchdev_obj *obj)); |
| }; |
| |
| 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 |