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struct phy_device; struct fixed_phy_status; struct phylink_link_state; #define DSA_TAG_PROTO_NONE_VALUE 0 #define DSA_TAG_PROTO_BRCM_VALUE 1 #define DSA_TAG_PROTO_BRCM_PREPEND_VALUE 2 #define DSA_TAG_PROTO_DSA_VALUE 3 #define DSA_TAG_PROTO_EDSA_VALUE 4 #define DSA_TAG_PROTO_GSWIP_VALUE 5 #define DSA_TAG_PROTO_KSZ9477_VALUE 6 #define DSA_TAG_PROTO_KSZ9893_VALUE 7 #define DSA_TAG_PROTO_LAN9303_VALUE 8 #define DSA_TAG_PROTO_MTK_VALUE 9 #define DSA_TAG_PROTO_QCA_VALUE 10 #define DSA_TAG_PROTO_TRAILER_VALUE 11 #define DSA_TAG_PROTO_8021Q_VALUE 12 #define DSA_TAG_PROTO_SJA1105_VALUE 13 #define DSA_TAG_PROTO_KSZ8795_VALUE 14 enum dsa_tag_protocol { DSA_TAG_PROTO_NONE = DSA_TAG_PROTO_NONE_VALUE, DSA_TAG_PROTO_BRCM = DSA_TAG_PROTO_BRCM_VALUE, DSA_TAG_PROTO_BRCM_PREPEND = DSA_TAG_PROTO_BRCM_PREPEND_VALUE, DSA_TAG_PROTO_DSA = DSA_TAG_PROTO_DSA_VALUE, DSA_TAG_PROTO_EDSA = DSA_TAG_PROTO_EDSA_VALUE, DSA_TAG_PROTO_GSWIP = DSA_TAG_PROTO_GSWIP_VALUE, DSA_TAG_PROTO_KSZ9477 = DSA_TAG_PROTO_KSZ9477_VALUE, DSA_TAG_PROTO_KSZ9893 = DSA_TAG_PROTO_KSZ9893_VALUE, DSA_TAG_PROTO_LAN9303 = DSA_TAG_PROTO_LAN9303_VALUE, DSA_TAG_PROTO_MTK = DSA_TAG_PROTO_MTK_VALUE, DSA_TAG_PROTO_QCA = DSA_TAG_PROTO_QCA_VALUE, DSA_TAG_PROTO_TRAILER = DSA_TAG_PROTO_TRAILER_VALUE, DSA_TAG_PROTO_8021Q = DSA_TAG_PROTO_8021Q_VALUE, DSA_TAG_PROTO_SJA1105 = DSA_TAG_PROTO_SJA1105_VALUE, DSA_TAG_PROTO_KSZ8795 = DSA_TAG_PROTO_KSZ8795_VALUE, }; 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); /* Used to determine which traffic should match the DSA filter in * eth_type_trans, and which, if any, should bypass it and be processed * as regular on the master net device. */ bool (*filter)(const struct sk_buff *skb, struct net_device *dev); unsigned int overhead; const char *name; enum dsa_tag_protocol proto; }; #define DSA_TAG_DRIVER_ALIAS "dsa_tag-" #define MODULE_ALIAS_DSA_TAG_DRIVER(__proto) \ MODULE_ALIAS(DSA_TAG_DRIVER_ALIAS __stringify(__proto##_VALUE)) struct dsa_skb_cb { struct sk_buff *clone; bool deferred_xmit; }; struct __dsa_skb_cb { struct dsa_skb_cb cb; u8 priv[48 - sizeof(struct dsa_skb_cb)]; }; #define __DSA_SKB_CB(skb) ((struct __dsa_skb_cb *)((skb)->cb)) #define DSA_SKB_CB(skb) ((struct dsa_skb_cb *)((skb)->cb)) #define DSA_SKB_CB_PRIV(skb) \ ((void *)(skb)->cb + offsetof(struct __dsa_skb_cb, priv)) 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); bool (*filter)(const struct sk_buff *skb, struct net_device *dev); 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; struct dsa_port *cpu_dp; const char *mac; struct device_node *dn; unsigned int ageing_time; bool vlan_filtering; u8 stp_state; struct net_device *bridge_dev; struct devlink_port devlink_port; struct phylink *pl; struct phylink_config pl_config; struct work_struct xmit_work; struct sk_buff_head xmit_queue; /* * Give the switch driver somewhere to hang its per-port private data * structures (accessible from the tagger). */ void *priv; /* * Original copy of the master netdev ethtool_ops */ const struct ethtool_ops *orig_ethtool_ops; /* * Original copy of the master netdev net_device_ops */ const struct net_device_ops *orig_ndo_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; /* Disallow bridge core from requesting different VLAN awareness * settings on ports if not hardware-supported */ bool vlan_filtering_is_global; /* In case vlan_filtering_is_global is set, the VLAN awareness state * should be retrieved from here and not from the per-port settings. */ bool vlan_filtering; /* 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); } static inline bool dsa_port_is_vlan_filtering(const struct dsa_port *dp) { const struct dsa_switch *ds = dp->ds; if (ds->vlan_filtering_is_global) return ds->vlan_filtering; else return dp->vlan_filtering; } typedef int dsa_fdb_dump_cb_t(const unsigned char *addr, u16 vid, bool is_static, void *data); struct dsa_switch_ops { enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds, int port); int (*setup)(struct dsa_switch *ds); void (*teardown)(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); /* * 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); int (*port_egress_floods)(struct dsa_switch *ds, int port, bool unicast, bool multicast); /* * 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); int (*port_setup_tc)(struct dsa_switch *ds, int port, enum tc_setup_type type, void *type_data); /* * 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); /* * Deferred frame Tx */ netdev_tx_t (*port_deferred_xmit)(struct dsa_switch *ds, int port, struct sk_buff *skb); }; struct dsa_switch_driver { struct list_head list; const struct dsa_switch_ops *ops; }; 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; } static inline bool dsa_can_decode(const struct sk_buff *skb, struct net_device *dev) { #if IS_ENABLED(CONFIG_NET_DSA) return !dev->dsa_ptr->filter || dev->dsa_ptr->filter(skb, dev); #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) netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev); 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); struct dsa_tag_driver { const struct dsa_device_ops *ops; struct list_head list; struct module *owner; }; void dsa_tag_drivers_register(struct dsa_tag_driver *dsa_tag_driver_array[], unsigned int count, struct module *owner); void dsa_tag_drivers_unregister(struct dsa_tag_driver *dsa_tag_driver_array[], unsigned int count); #define dsa_tag_driver_module_drivers(__dsa_tag_drivers_array, __count) \ static int __init dsa_tag_driver_module_init(void) \ { \ dsa_tag_drivers_register(__dsa_tag_drivers_array, __count, \ THIS_MODULE); \ return 0; \ } \ module_init(dsa_tag_driver_module_init); \ \ static void __exit dsa_tag_driver_module_exit(void) \ { \ dsa_tag_drivers_unregister(__dsa_tag_drivers_array, __count); \ } \ module_exit(dsa_tag_driver_module_exit) /** * module_dsa_tag_drivers() - Helper macro for registering DSA tag * drivers * @__ops_array: Array of tag driver strucutres * * Helper macro for DSA tag drivers which do not do anything special * in module init/exit. Each module may only use this macro once, and * calling it replaces module_init() and module_exit(). */ #define module_dsa_tag_drivers(__ops_array) \ dsa_tag_driver_module_drivers(__ops_array, ARRAY_SIZE(__ops_array)) #define DSA_TAG_DRIVER_NAME(__ops) dsa_tag_driver ## _ ## __ops /* Create a static structure we can build a linked list of dsa_tag * drivers */ #define DSA_TAG_DRIVER(__ops) \ static struct dsa_tag_driver DSA_TAG_DRIVER_NAME(__ops) = { \ .ops = &__ops, \ } /** * module_dsa_tag_driver() - Helper macro for registering a single DSA tag * driver * @__ops: Single tag driver structures * * Helper macro for DSA tag drivers which do not do anything special * in module init/exit. Each module may only use this macro once, and * calling it replaces module_init() and module_exit(). */ #define module_dsa_tag_driver(__ops) \ DSA_TAG_DRIVER(__ops); \ \ static struct dsa_tag_driver *dsa_tag_driver_array[] = { \ &DSA_TAG_DRIVER_NAME(__ops) \ }; \ module_dsa_tag_drivers(dsa_tag_driver_array) #endif