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Diffstat (limited to '')
| -rw-r--r-- | include/net/dsa.h | 628 |
1 files changed, 628 insertions, 0 deletions
diff --git a/include/net/dsa.h b/include/net/dsa.h new file mode 100644 index 000000000..d28df7adf --- /dev/null +++ b/include/net/dsa.h @@ -0,0 +1,628 @@ +/* + * 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.h> +#include <linux/if_ether.h> +#include <linux/list.h> +#include <linux/notifier.h> +#include <linux/timer.h> +#include <linux/workqueue.h> +#include <linux/of.h> +#include <linux/ethtool.h> +#include <linux/net_tstamp.h> +#include <linux/phy.h> +#include <net/devlink.h> +#include <net/switchdev.h> + +struct tc_action; +struct phy_device; +struct fixed_phy_status; +struct phylink_link_state; + +enum dsa_tag_protocol { + DSA_TAG_PROTO_NONE = 0, + DSA_TAG_PROTO_BRCM, + DSA_TAG_PROTO_BRCM_PREPEND, + DSA_TAG_PROTO_DSA, + DSA_TAG_PROTO_EDSA, + DSA_TAG_PROTO_KSZ, + DSA_TAG_PROTO_LAN9303, + DSA_TAG_PROTO_MTK, + DSA_TAG_PROTO_QCA, + DSA_TAG_PROTO_TRAILER, + DSA_TAG_LAST, /* MUST BE LAST */ +}; + +#define DSA_MAX_SWITCHES 4 +#define DSA_MAX_PORTS 12 + +#define DSA_RTABLE_NONE -1 + +struct dsa_chip_data { + /* + * How to access the switch configuration registers. + */ + struct device *host_dev; + int sw_addr; + + /* + * Reference to network devices + */ + struct device *netdev[DSA_MAX_PORTS]; + + /* 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 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[DSA_MAX_SWITCHES]; +}; + +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; + +struct dsa_device_ops { + struct sk_buff *(*xmit)(struct sk_buff *skb, struct net_device *dev); + struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev, + struct packet_type *pt); + int (*flow_dissect)(const struct sk_buff *skb, __be16 *proto, + int *offset); +}; + +struct dsa_switch_tree { + struct list_head list; + + /* Notifier chain for switch-wide events */ + struct raw_notifier_head nh; + + /* Tree identifier */ + unsigned int index; + + /* Number of switches attached to this tree */ + struct kref refcount; + + /* Has this tree been applied to the hardware? */ + bool setup; + + /* + * Configuration data for the platform device that owns + * this dsa switch tree instance. + */ + struct dsa_platform_data *pd; + + /* + * The switch port to which the CPU is attached. + */ + struct dsa_port *cpu_dp; + + /* + * Data for the individual switch chips. + */ + struct dsa_switch *ds[DSA_MAX_SWITCHES]; +}; + +/* TC matchall action types, only mirroring for now */ +enum dsa_port_mall_action_type { + DSA_PORT_MALL_MIRROR, +}; + +/* TC mirroring entry */ +struct dsa_mall_mirror_tc_entry { + u8 to_local_port; + bool ingress; +}; + +/* TC matchall entry */ +struct dsa_mall_tc_entry { + struct list_head list; + unsigned long cookie; + enum dsa_port_mall_action_type type; + union { + struct dsa_mall_mirror_tc_entry mirror; + }; +}; + + +struct dsa_port { + /* A CPU port is physically connected to a master device. + * A user port exposed to userspace has a slave device. + */ + union { + struct net_device *master; + struct net_device *slave; + }; + + /* CPU port tagging operations used by master or slave devices */ + const struct dsa_device_ops *tag_ops; + + /* Copies for faster access in master receive hot path */ + struct dsa_switch_tree *dst; + struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev, + struct packet_type *pt); + + enum { + DSA_PORT_TYPE_UNUSED = 0, + DSA_PORT_TYPE_CPU, + DSA_PORT_TYPE_DSA, + DSA_PORT_TYPE_USER, + } type; + + struct dsa_switch *ds; + unsigned int index; + const char *name; + const struct dsa_port *cpu_dp; + const char *mac; + struct device_node *dn; + unsigned int ageing_time; + u8 stp_state; + struct net_device *bridge_dev; + struct devlink_port devlink_port; + struct phylink *pl; + /* + * Original copy of the master netdev ethtool_ops + */ + const struct ethtool_ops *orig_ethtool_ops; +}; + +struct dsa_switch { + struct device *dev; + + /* + * Parent switch tree, and switch index. + */ + struct dsa_switch_tree *dst; + unsigned int index; + + /* Listener for switch fabric events */ + struct notifier_block nb; + + /* + * Give the switch driver somewhere to hang its private data + * structure. + */ + void *priv; + + /* + * Configuration data for this switch. + */ + struct dsa_chip_data *cd; + + /* + * The switch operations. + */ + const struct dsa_switch_ops *ops; + + /* + * An array 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[DSA_MAX_SWITCHES]; + + /* + * Slave mii_bus and devices for the individual ports. + */ + u32 phys_mii_mask; + struct mii_bus *slave_mii_bus; + + /* Ageing Time limits in msecs */ + unsigned int ageing_time_min; + unsigned int ageing_time_max; + + /* devlink used to represent this switch device */ + struct devlink *devlink; + + /* Number of switch port queues */ + unsigned int num_tx_queues; + + unsigned long *bitmap; + unsigned long _bitmap; + + /* Dynamically allocated ports, keep last */ + size_t num_ports; + struct dsa_port ports[]; +}; + +static inline const struct dsa_port *dsa_to_port(struct dsa_switch *ds, int p) +{ + return &ds->ports[p]; +} + +static inline bool dsa_is_unused_port(struct dsa_switch *ds, int p) +{ + return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_UNUSED; +} + +static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p) +{ + return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_CPU; +} + +static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p) +{ + return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_DSA; +} + +static inline bool dsa_is_user_port(struct dsa_switch *ds, int p) +{ + return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_USER; +} + +static inline u32 dsa_user_ports(struct dsa_switch *ds) +{ + u32 mask = 0; + int p; + + for (p = 0; p < ds->num_ports; p++) + if (dsa_is_user_port(ds, p)) + mask |= BIT(p); + + return mask; +} + +/* Return the local port used to reach an arbitrary switch port */ +static inline unsigned int dsa_towards_port(struct dsa_switch *ds, int device, + int port) +{ + if (device == ds->index) + return port; + else + return ds->rtable[device]; +} + +/* Return the local port used to reach the dedicated CPU port */ +static inline unsigned int dsa_upstream_port(struct dsa_switch *ds, int port) +{ + const struct dsa_port *dp = dsa_to_port(ds, port); + const struct dsa_port *cpu_dp = dp->cpu_dp; + + if (!cpu_dp) + return port; + + return dsa_towards_port(ds, cpu_dp->ds->index, cpu_dp->index); +} + +typedef int dsa_fdb_dump_cb_t(const unsigned char *addr, u16 vid, + bool is_static, void *data); +struct dsa_switch_ops { +#if IS_ENABLED(CONFIG_NET_DSA_LEGACY) + /* + * Legacy probing. + */ + const char *(*probe)(struct device *dsa_dev, + struct device *host_dev, int sw_addr, + void **priv); +#endif + + enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds, + int port); + + int (*setup)(struct dsa_switch *ds); + 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); + + /* + * PHYLINK integration + */ + void (*phylink_validate)(struct dsa_switch *ds, int port, + unsigned long *supported, + struct phylink_link_state *state); + int (*phylink_mac_link_state)(struct dsa_switch *ds, int port, + struct phylink_link_state *state); + void (*phylink_mac_config)(struct dsa_switch *ds, int port, + unsigned int mode, + const struct phylink_link_state *state); + void (*phylink_mac_an_restart)(struct dsa_switch *ds, int port); + void (*phylink_mac_link_down)(struct dsa_switch *ds, int port, + unsigned int mode, + phy_interface_t interface); + void (*phylink_mac_link_up)(struct dsa_switch *ds, int port, + unsigned int mode, + phy_interface_t interface, + struct phy_device *phydev); + void (*phylink_fixed_state)(struct dsa_switch *ds, int port, + struct phylink_link_state *state); + /* + * ethtool hardware statistics. + */ + void (*get_strings)(struct dsa_switch *ds, int port, + u32 stringset, uint8_t *data); + void (*get_ethtool_stats)(struct dsa_switch *ds, + int port, uint64_t *data); + int (*get_sset_count)(struct dsa_switch *ds, int port, int sset); + void (*get_ethtool_phy_stats)(struct dsa_switch *ds, + int port, uint64_t *data); + + /* + * 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); + + /* + * ethtool timestamp info + */ + int (*get_ts_info)(struct dsa_switch *ds, int port, + struct ethtool_ts_info *ts); + + /* + * 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); + + /* + * Port's MAC EEE settings + */ + int (*set_mac_eee)(struct dsa_switch *ds, int port, + struct ethtool_eee *e); + int (*get_mac_eee)(struct dsa_switch *ds, int port, + struct ethtool_eee *e); + + /* 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 (*set_ageing_time)(struct dsa_switch *ds, unsigned int msecs); + int (*port_bridge_join)(struct dsa_switch *ds, int port, + struct net_device *bridge); + void (*port_bridge_leave)(struct dsa_switch *ds, int port, + struct net_device *bridge); + void (*port_stp_state_set)(struct dsa_switch *ds, int port, + u8 state); + void (*port_fast_age)(struct dsa_switch *ds, int port); + + /* + * 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); + void (*port_vlan_add)(struct dsa_switch *ds, int port, + const struct switchdev_obj_port_vlan *vlan); + int (*port_vlan_del)(struct dsa_switch *ds, int port, + const struct switchdev_obj_port_vlan *vlan); + /* + * 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_dump)(struct dsa_switch *ds, int port, + dsa_fdb_dump_cb_t *cb, void *data); + + /* + * Multicast database + */ + int (*port_mdb_prepare)(struct dsa_switch *ds, int port, + const struct switchdev_obj_port_mdb *mdb); + void (*port_mdb_add)(struct dsa_switch *ds, int port, + const struct switchdev_obj_port_mdb *mdb); + int (*port_mdb_del)(struct dsa_switch *ds, int port, + const struct switchdev_obj_port_mdb *mdb); + /* + * RXNFC + */ + int (*get_rxnfc)(struct dsa_switch *ds, int port, + struct ethtool_rxnfc *nfc, u32 *rule_locs); + int (*set_rxnfc)(struct dsa_switch *ds, int port, + struct ethtool_rxnfc *nfc); + + /* + * TC integration + */ + int (*port_mirror_add)(struct dsa_switch *ds, int port, + struct dsa_mall_mirror_tc_entry *mirror, + bool ingress); + void (*port_mirror_del)(struct dsa_switch *ds, int port, + struct dsa_mall_mirror_tc_entry *mirror); + + /* + * Cross-chip operations + */ + int (*crosschip_bridge_join)(struct dsa_switch *ds, int sw_index, + int port, struct net_device *br); + void (*crosschip_bridge_leave)(struct dsa_switch *ds, int sw_index, + int port, struct net_device *br); + + /* + * PTP functionality + */ + int (*port_hwtstamp_get)(struct dsa_switch *ds, int port, + struct ifreq *ifr); + int (*port_hwtstamp_set)(struct dsa_switch *ds, int port, + struct ifreq *ifr); + bool (*port_txtstamp)(struct dsa_switch *ds, int port, + struct sk_buff *clone, unsigned int type); + bool (*port_rxtstamp)(struct dsa_switch *ds, int port, + struct sk_buff *skb, unsigned int type); +}; + +struct dsa_switch_driver { + struct list_head list; + const struct dsa_switch_ops *ops; +}; + +#if IS_ENABLED(CONFIG_NET_DSA_LEGACY) +/* Legacy driver registration */ +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); + +#else +static inline void register_switch_driver(struct dsa_switch_driver *type) { } +static inline void unregister_switch_driver(struct dsa_switch_driver *type) { } +static inline struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev) +{ + return NULL; +} +#endif +struct net_device *dsa_dev_to_net_device(struct device *dev); + +/* Keep inline for faster access in hot path */ +static inline bool netdev_uses_dsa(struct net_device *dev) +{ +#if IS_ENABLED(CONFIG_NET_DSA) + return dev->dsa_ptr && dev->dsa_ptr->rcv; +#endif + return false; +} + +struct dsa_switch *dsa_switch_alloc(struct device *dev, size_t n); +void dsa_unregister_switch(struct dsa_switch *ds); +int dsa_register_switch(struct dsa_switch *ds); +#ifdef CONFIG_PM_SLEEP +int dsa_switch_suspend(struct dsa_switch *ds); +int dsa_switch_resume(struct dsa_switch *ds); +#else +static inline int dsa_switch_suspend(struct dsa_switch *ds) +{ + return 0; +} +static inline int dsa_switch_resume(struct dsa_switch *ds) +{ + return 0; +} +#endif /* CONFIG_PM_SLEEP */ + +enum dsa_notifier_type { + DSA_PORT_REGISTER, + DSA_PORT_UNREGISTER, +}; + +struct dsa_notifier_info { + struct net_device *dev; +}; + +struct dsa_notifier_register_info { + struct dsa_notifier_info info; /* must be first */ + struct net_device *master; + unsigned int port_number; + unsigned int switch_number; +}; + +static inline struct net_device * +dsa_notifier_info_to_dev(const struct dsa_notifier_info *info) +{ + return info->dev; +} + +#if IS_ENABLED(CONFIG_NET_DSA) +int register_dsa_notifier(struct notifier_block *nb); +int unregister_dsa_notifier(struct notifier_block *nb); +int call_dsa_notifiers(unsigned long val, struct net_device *dev, + struct dsa_notifier_info *info); +#else +static inline int register_dsa_notifier(struct notifier_block *nb) +{ + return 0; +} + +static inline int unregister_dsa_notifier(struct notifier_block *nb) +{ + return 0; +} + +static inline int call_dsa_notifiers(unsigned long val, struct net_device *dev, + struct dsa_notifier_info *info) +{ + return NOTIFY_DONE; +} +#endif + +/* Broadcom tag specific helpers to insert and extract queue/port number */ +#define BRCM_TAG_SET_PORT_QUEUE(p, q) ((p) << 8 | q) +#define BRCM_TAG_GET_PORT(v) ((v) >> 8) +#define BRCM_TAG_GET_QUEUE(v) ((v) & 0xff) + + +int dsa_port_get_phy_strings(struct dsa_port *dp, uint8_t *data); +int dsa_port_get_ethtool_phy_stats(struct dsa_port *dp, uint64_t *data); +int dsa_port_get_phy_sset_count(struct dsa_port *dp); +void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up); + +#endif |