/* SPDX-License-Identifier: GPL-2.0 */ /* Copyright 2011-2014 Autronica Fire and Security AS * * Author(s): * 2011-2014 Arvid Brodin, arvid.brodin@alten.se */ #ifndef __HSR_PRP_MAIN_H #define __HSR_PRP_MAIN_H #include #include #include #include /* Time constants as specified in the HSR specification (IEC-62439-3 2010) * Table 8. * All values in milliseconds. */ #define HSR_PRP_LIFE_CHECK_INTERVAL 2000 /* ms */ #define HSR_PRP_NODE_FORGET_TIME 60000 /* ms */ #define HSR_PRP_ANNOUNCE_INTERVAL 100 /* ms */ /* By how much may slave1 and slave2 timestamps of latest received frame from * each node differ before we notify of communication problem? */ #define HSR_PRP_MAX_SLAVE_DIFF 3000 /* ms */ #define HSR_PRP_SEQNR_START (USHRT_MAX - 1024) #define HSR_PRP_SUP_SEQNR_START (HSR_PRP_SEQNR_START / 2) /* How often shall we check for broken ring and remove node entries older than * HSR_PRP_NODE_FORGET_TIME? */ #define HSR_PRP_PRUNE_PERIOD 3000 /* ms */ #define HSR_TLV_ANNOUNCE 22 #define HSR_TLV_LIFE_CHECK 23 /* PRP V1 life check for Duplicate discard */ #define PRP_TLV_LIFE_CHECK_DD 20 /* PRP V1 life check for Duplicate Accept */ #define PRP_TLV_LIFE_CHECK_DA 21 /* HSR Tag. * As defined in IEC-62439-3:2010, the HSR tag is really { ethertype = 0x88FB, * path, LSDU_size, sequence Nr }. But we let eth_header() create { h_dest, * h_source, h_proto = 0x88FB }, and add { path, LSDU_size, sequence Nr, * encapsulated protocol } instead. * * Field names as defined in the IEC:2010 standard for HSR. */ struct hsr_tag { __be16 path_and_LSDU_size; __be16 sequence_nr; __be16 encap_proto; } __packed; #define HSR_PRP_HLEN 6 #define HSR_PRP_V1_SUP_LSDUSIZE 52 /* The helper functions below assumes that 'path' occupies the 4 most * significant bits of the 16-bit field shared by 'path' and 'LSDU_size' (or * equivalently, the 4 most significant bits of HSR tag byte 14). * * This is unclear in the IEC specification; its definition of MAC addresses * indicates the spec is written with the least significant bit first (to the * left). This, however, would mean that the LSDU field would be split in two * with the path field in-between, which seems strange. I'm guessing the MAC * address definition is in error. */ static inline u16 get_hsr_tag_path(struct hsr_tag *ht) { return ntohs(ht->path_and_LSDU_size) >> 12; } static inline u16 get_hsr_tag_LSDU_size(struct hsr_tag *ht) { return ntohs(ht->path_and_LSDU_size) & 0x0FFF; } static inline void set_hsr_tag_path(struct hsr_tag *ht, u16 path) { ht->path_and_LSDU_size = htons((ntohs(ht->path_and_LSDU_size) & 0x0FFF) | (path << 12)); } static inline void set_hsr_tag_LSDU_size(struct hsr_tag *ht, u16 LSDU_size) { ht->path_and_LSDU_size = htons((ntohs(ht->path_and_LSDU_size) & 0xF000) | (LSDU_size & 0x0FFF)); } struct hsr_ethhdr { struct ethhdr ethhdr; struct hsr_tag hsr_tag; } __packed; struct hsr_vlan_ethhdr { struct vlan_ethhdr vlanhdr; struct hsr_tag hsr_tag; } __packed; /* HSR/PRP Supervision Frame data types. * Field names as defined in the IEC:2012 standard for HSR. */ struct hsr_prp_sup_tag { __be16 path_and_HSR_ver; __be16 sequence_nr; __u8 HSR_TLV_type; __u8 HSR_TLV_length; } __packed; struct hsr_prp_sup_payload { unsigned char macaddress_A[ETH_ALEN]; } __packed; static inline u16 get_hsr_stag_path(struct hsr_prp_sup_tag *hst) { return get_hsr_tag_path((struct hsr_tag *)hst); } static inline u16 get_hsr_stag_HSR_ver(struct hsr_prp_sup_tag *hst) { return get_hsr_tag_LSDU_size((struct hsr_tag *)hst); } static inline void set_hsr_stag_path(struct hsr_prp_sup_tag *hst, u16 path) { set_hsr_tag_path((struct hsr_tag *)hst, path); } static inline void set_hsr_stag_HSR_ver(struct hsr_prp_sup_tag *hst, u16 HSR_ver) { set_hsr_tag_LSDU_size((struct hsr_tag *)hst, HSR_ver); } struct hsrv0_ethhdr_sp { struct ethhdr ethhdr; struct hsr_prp_sup_tag hsr_sup; } __packed; struct hsrv0_ethhdr_vlan_sp { struct ethhdr ethhdr; struct vlan_hdr vlanHdr; struct hsr_prp_sup_tag hsr_sup; } __packed; struct hsrv1_ethhdr_sp { struct ethhdr ethhdr; struct hsr_tag hsr; struct hsr_prp_sup_tag hsr_sup; } __packed; struct hsrv1_ethhdr_vlan_sp { struct ethhdr ethhdr; struct vlan_hdr vlanHdr; struct hsr_tag hsr; struct hsr_prp_sup_tag hsr_sup; } __packed; enum hsr_prp_port_type { HSR_PRP_PT_NONE = 0, /* Must be 0, used by framereg */ HSR_PRP_PT_SLAVE_A, HSR_PRP_PT_SLAVE_B, HSR_PRP_PT_INTERLINK, HSR_PRP_PT_MASTER, HSR_PRP_PT_PORTS, /* This must be the last item in the enum */ }; /* PRP Redunancy Control Trailor (RCT). * As defined in IEC-62439-4:2012, the PRP RCT is really { sequence Nr, * Lan indentifier (LanId), LSDU_size and PRP_suffix = 0x88FB }. * * Field names as defined in the IEC:2012 standard for PRP. */ struct prp_rct { __be16 sequence_nr; __be16 lan_id_and_LSDU_size; __be16 PRP_suffix; } __packed; static inline u16 get_prp_LSDU_size(struct prp_rct *rct) { return ntohs(rct->lan_id_and_LSDU_size) & 0x0FFF; } static inline void set_prp_lan_id(struct prp_rct *rct, u16 lan_id) { rct->lan_id_and_LSDU_size = htons((ntohs(rct->lan_id_and_LSDU_size) & 0x0FFF) | (lan_id << 12)); } static inline void set_prp_LSDU_size(struct prp_rct *rct, u16 LSDU_size) { rct->lan_id_and_LSDU_size = htons( (ntohs(rct->lan_id_and_LSDU_size) & 0xF000) | (LSDU_size & 0x0FFF)); } struct hsr_prp_debug_stats { u32 cnt_tx_sup; u32 cnt_rx_sup_a; u32 cnt_rx_sup_b; }; struct hsr_prp_port { struct list_head port_list; struct net_device *dev; struct hsr_prp_priv *priv; enum hsr_prp_port_type type; }; #define HSR 0 #define PRP 1 struct hsr_prp_priv { struct rcu_head rcu_head; struct list_head ports; struct list_head node_db; /* Known HSR nodes */ struct list_head self_node_db; /* MACs of slaves */ struct timer_list announce_timer; /* Supervision frame dispatch */ struct timer_list prune_timer; unsigned int rx_offloaded : 1; /* lre handle in hw */ unsigned int l2_fwd_offloaded : 1; /* L2 forward in hw */ struct hsr_prp_debug_stats dbg_stats; /* debug stats */ struct lre_stats lre_stats; /* lre interface stats */ int announce_count; u16 sequence_nr; u16 sup_sequence_nr; /* For HSRv1 separate seq_nr for supervision */ u8 prot_version; /* Indicate if HSRv0 or HSRv1. */ spinlock_t seqnr_lock; /* locking for sequence_nr */ #define HSR_V0 0 #define HSR_V1 1 #define PRP_V1 2 #define PRP_LAN_ID 0x5 /* 0x1010 for A and 0x1011 for B. Bit 0 is set * based on SLAVE_A or SLAVE_B */ u8 net_id; /* for PRP, it occupies most significant 3 bits * of lan_id */ /* Below are used when SV frames are to be sent with VLAN tag */ u8 use_vlan_for_sv; u16 sv_frame_vid; u8 sv_frame_dei; u8 sv_frame_pcp; /* To enable/disable SV frame transmission */ u8 disable_sv_frame; /* value of hsr mode */ enum iec62439_3_hsr_modes hsr_mode; /* PRP Transparent Reception */ enum iec62439_3_tr_modes prp_tr; /* Duplicate discard mode */ enum iec62439_3_dd_modes dd_mode; /* Clear Node Table command */ enum iec62439_3_clear_nt_cmd clear_nt_cmd; u32 dlrmt; /* duplicate list reside max time */ unsigned char sup_multicast_addr[ETH_ALEN]; #ifdef CONFIG_DEBUG_FS struct dentry *root_dir; struct dentry *lre_info_file; #endif #ifdef CONFIG_PROC_FS struct proc_dir_entry *dir; struct proc_dir_entry *hsr_mode_file; struct proc_dir_entry *dd_mode_file; struct proc_dir_entry *prp_tr_file; struct proc_dir_entry *clear_nt_file; struct proc_dir_entry *dlrmt_file; struct proc_dir_entry *lre_stats_file; struct proc_dir_entry *node_table_file; struct proc_dir_entry *disable_sv_file; #endif }; #define hsr_prp_for_each_port(priv, port) \ list_for_each_entry_rcu((port), &(priv)->ports, port_list) struct hsr_prp_port *hsr_prp_get_port(struct hsr_prp_priv *priv, enum hsr_prp_port_type pt); /* Caller must ensure skb is a valid HSR frame */ static inline u16 hsr_get_skb_sequence_nr(struct sk_buff *skb) { struct hsr_ethhdr *hsr_ethhdr; hsr_ethhdr = (struct hsr_ethhdr *)skb_mac_header(skb); return ntohs(hsr_ethhdr->hsr_tag.sequence_nr); } static inline struct prp_rct *skb_get_PRP_rct(struct sk_buff *skb) { unsigned char *tail = skb_tail_pointer(skb) - HSR_PRP_HLEN; struct prp_rct *rct = (struct prp_rct *)tail; if (rct->PRP_suffix == htons(ETH_P_PRP)) return rct; return NULL; } /* Assume caller has confirmed this skb is PRP suffixed */ static inline u16 prp_get_skb_sequence_nr(struct prp_rct *rct) { return ntohs(rct->sequence_nr); } static inline u16 get_prp_lan_id(struct prp_rct *rct) { return ntohs(rct->lan_id_and_LSDU_size) >> 12; } /* assume there is a valid rct */ static inline bool prp_check_lsdu_size(struct sk_buff *skb, struct prp_rct *rct, bool is_sup) { struct ethhdr *ethhdr; int expected_lsdu_size; if (is_sup) { expected_lsdu_size = HSR_PRP_V1_SUP_LSDUSIZE; } else { ethhdr = (struct ethhdr *)skb_mac_header(skb); expected_lsdu_size = skb->len - 14; if (ethhdr->h_proto == htons(ETH_P_8021Q)) expected_lsdu_size -= 4; } return (expected_lsdu_size == get_prp_LSDU_size(rct)); } int hsr_prp_register_notifier(u8 proto); void hsr_prp_unregister_notifier(u8 proto); #define INC_CNT_TX_AB(type, priv) (((type) == HSR_PRP_PT_SLAVE_A) ? \ (priv)->lre_stats.cnt_tx_a++ : \ (priv)->lre_stats.cnt_tx_b++) #define INC_CNT_TX_C(priv) ((priv)->lre_stats.cnt_tx_c++) #define INC_CNT_RX_WRONG_LAN_AB(type, priv) (((type) == HSR_PRP_PT_SLAVE_A) ? \ (priv)->lre_stats.cnt_errwronglan_a++ : \ (priv)->lre_stats.cnt_errwronglan_b++) #define INC_CNT_RX_AB(type, priv) (((type) == HSR_PRP_PT_SLAVE_A) ? \ (priv)->lre_stats.cnt_rx_a++ : \ (priv)->lre_stats.cnt_rx_b++) #define INC_CNT_RX_C(priv) ((priv)->lre_stats.cnt_rx_c++) #define INC_CNT_RX_ERROR_AB(type, priv) (((type) == HSR_PRP_PT_SLAVE_A) ? \ (priv)->lre_stats.cnt_errors_a++ : \ (priv)->lre_stats.cnt_errors_b++) #define INC_CNT_OWN_RX_AB(type, priv) (((type) == HSR_PRP_PT_SLAVE_A) ? \ (priv)->lre_stats.cnt_own_rx_a++ : \ (priv)->lre_stats.cnt_own_rx_b++) #define INC_CNT_TX_SUP(priv) ((priv)->dbg_stats.cnt_tx_sup++) #define INC_CNT_RX_SUP_A(priv) ((priv)->dbg_stats.cnt_rx_sup_a++) #define INC_CNT_RX_SUP_B(priv) ((priv)->dbg_stats.cnt_rx_sup_b++) #if IS_ENABLED(CONFIG_DEBUG_FS) int hsr_prp_debugfs_init(struct hsr_prp_priv *priv, struct net_device *ndev); void hsr_prp_debugfs_term(struct hsr_prp_priv *priv); #else static inline int hsr_prp_debugfs_init(struct hsr_prp_priv *priv, struct net_device *ndev) { return 0; } static inline void hsr_prp_debugfs_term(struct hsr_prp_priv *priv) {} #endif #ifdef CONFIG_PROC_FS int hsr_prp_create_procfs(struct hsr_prp_priv *priv, struct net_device *ndev); void hsr_prp_remove_procfs(struct hsr_prp_priv *priv, struct net_device *ndev); #else static inline int hsr_prp_create_procfs(struct hsr_prp_priv *priv, struct net_device *ndev) { return 0; } static inline void hsr_prp_remove_procfs(struct hsr_prp_priv *priv, struct net_device *ndev) {} #endif int hsr_prp_lredev_attr_set(struct hsr_prp_priv *priv, struct lredev_attr *attr); int hsr_prp_lredev_attr_get(struct hsr_prp_priv *priv, struct lredev_attr *attr); int hsr_prp_lredev_get_node_table(struct hsr_prp_priv *priv, struct lre_node_table_entry table[], int size); int hsr_prp_lredev_get_lre_stats(struct hsr_prp_priv *priv, struct lre_stats *stats); #endif /* __HSR_PRP_MAIN_H */