Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /* Copyright 2011-2014 Autronica Fire and Security AS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  * Author(s):
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  *	2011-2014 Arvid Brodin, arvid.brodin@alten.se
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * include file for HSR and PRP.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #ifndef __HSR_PRIVATE_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #define __HSR_PRIVATE_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/netdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/list.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/if_vlan.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) /* Time constants as specified in the HSR specification (IEC-62439-3 2010)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18)  * Table 8.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19)  * All values in milliseconds.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #define HSR_LIFE_CHECK_INTERVAL		 2000 /* ms */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #define HSR_NODE_FORGET_TIME		60000 /* ms */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #define HSR_ANNOUNCE_INTERVAL		  100 /* ms */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #define HSR_ENTRY_FORGET_TIME		  400 /* ms */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) /* By how much may slave1 and slave2 timestamps of latest received frame from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27)  * each node differ before we notify of communication problem?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) #define MAX_SLAVE_DIFF			 3000 /* ms */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) #define HSR_SEQNR_START			(USHRT_MAX - 1024)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) #define HSR_SUP_SEQNR_START		(HSR_SEQNR_START / 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) /* How often shall we check for broken ring and remove node entries older than
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34)  * HSR_NODE_FORGET_TIME?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) #define PRUNE_PERIOD			 3000 /* ms */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) #define HSR_TLV_ANNOUNCE		   22
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) #define HSR_TLV_LIFE_CHECK		   23
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) /* PRP V1 life check for Duplicate discard */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) #define PRP_TLV_LIFE_CHECK_DD		   20
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) /* PRP V1 life check for Duplicate Accept */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) #define PRP_TLV_LIFE_CHECK_DA		   21
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) /* HSR Tag.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46)  * As defined in IEC-62439-3:2010, the HSR tag is really { ethertype = 0x88FB,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47)  * path, LSDU_size, sequence Nr }. But we let eth_header() create { h_dest,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48)  * h_source, h_proto = 0x88FB }, and add { path, LSDU_size, sequence Nr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49)  * encapsulated protocol } instead.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51)  * Field names as defined in the IEC:2010 standard for HSR.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) struct hsr_tag {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	__be16		path_and_LSDU_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	__be16		sequence_nr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	__be16		encap_proto;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) #define HSR_HLEN	6
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) #define HSR_V1_SUP_LSDUSIZE		52
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) /* The helper functions below assumes that 'path' occupies the 4 most
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64)  * significant bits of the 16-bit field shared by 'path' and 'LSDU_size' (or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65)  * equivalently, the 4 most significant bits of HSR tag byte 14).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67)  * This is unclear in the IEC specification; its definition of MAC addresses
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68)  * indicates the spec is written with the least significant bit first (to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69)  * left). This, however, would mean that the LSDU field would be split in two
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70)  * with the path field in-between, which seems strange. I'm guessing the MAC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71)  * address definition is in error.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) static inline void set_hsr_tag_path(struct hsr_tag *ht, u16 path)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	ht->path_and_LSDU_size =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 		htons((ntohs(ht->path_and_LSDU_size) & 0x0FFF) | (path << 12));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) static inline void set_hsr_tag_LSDU_size(struct hsr_tag *ht, u16 LSDU_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	ht->path_and_LSDU_size = htons((ntohs(ht->path_and_LSDU_size) &
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 				       0xF000) | (LSDU_size & 0x0FFF));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) struct hsr_ethhdr {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	struct ethhdr	ethhdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	struct hsr_tag	hsr_tag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) struct hsr_vlan_ethhdr {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	struct vlan_ethhdr vlanhdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	struct hsr_tag	hsr_tag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) /* HSR/PRP Supervision Frame data types.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97)  * Field names as defined in the IEC:2010 standard for HSR.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) struct hsr_sup_tag {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	__be16		path_and_HSR_ver;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	__be16		sequence_nr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	__u8		HSR_TLV_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	__u8		HSR_TLV_length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) struct hsr_sup_payload {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	unsigned char	macaddress_A[ETH_ALEN];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) static inline void set_hsr_stag_path(struct hsr_sup_tag *hst, u16 path)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	set_hsr_tag_path((struct hsr_tag *)hst, path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) static inline void set_hsr_stag_HSR_ver(struct hsr_sup_tag *hst, u16 HSR_ver)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	set_hsr_tag_LSDU_size((struct hsr_tag *)hst, HSR_ver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) struct hsrv0_ethhdr_sp {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	struct ethhdr		ethhdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	struct hsr_sup_tag	hsr_sup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) struct hsrv1_ethhdr_sp {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	struct ethhdr		ethhdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	struct hsr_tag		hsr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	struct hsr_sup_tag	hsr_sup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) enum hsr_port_type {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	HSR_PT_NONE = 0,	/* Must be 0, used by framereg */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	HSR_PT_SLAVE_A,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	HSR_PT_SLAVE_B,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	HSR_PT_INTERLINK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	HSR_PT_MASTER,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	HSR_PT_PORTS,	/* This must be the last item in the enum */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) /* PRP Redunancy Control Trailor (RCT).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)  * As defined in IEC-62439-4:2012, the PRP RCT is really { sequence Nr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)  * Lan indentifier (LanId), LSDU_size and PRP_suffix = 0x88FB }.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)  * Field names as defined in the IEC:2012 standard for PRP.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) struct prp_rct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	__be16          sequence_nr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	__be16          lan_id_and_LSDU_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	__be16          PRP_suffix;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) static inline u16 get_prp_LSDU_size(struct prp_rct *rct)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	return ntohs(rct->lan_id_and_LSDU_size) & 0x0FFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) static inline void set_prp_lan_id(struct prp_rct *rct, u16 lan_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	rct->lan_id_and_LSDU_size = htons((ntohs(rct->lan_id_and_LSDU_size) &
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 					  0x0FFF) | (lan_id << 12));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) static inline void set_prp_LSDU_size(struct prp_rct *rct, u16 LSDU_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	rct->lan_id_and_LSDU_size = htons((ntohs(rct->lan_id_and_LSDU_size) &
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 					  0xF000) | (LSDU_size & 0x0FFF));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) struct hsr_port {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	struct list_head	port_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	struct net_device	*dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	struct hsr_priv		*hsr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	enum hsr_port_type	type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) /* used by driver internally to differentiate various protocols */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) enum hsr_version {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	HSR_V0 = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	HSR_V1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	PRP_V1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) struct hsr_frame_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) struct hsr_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) struct hsr_proto_ops {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	/* format and send supervision frame */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	void (*send_sv_frame)(struct hsr_port *port, unsigned long *interval);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	void (*handle_san_frame)(bool san, enum hsr_port_type port,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 				 struct hsr_node *node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	bool (*drop_frame)(struct hsr_frame_info *frame, struct hsr_port *port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	struct sk_buff * (*get_untagged_frame)(struct hsr_frame_info *frame,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 					       struct hsr_port *port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	struct sk_buff * (*create_tagged_frame)(struct hsr_frame_info *frame,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 						struct hsr_port *port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	int (*fill_frame_info)(__be16 proto, struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 			       struct hsr_frame_info *frame);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	bool (*invalid_dan_ingress_frame)(__be16 protocol);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	void (*update_san_info)(struct hsr_node *node, bool is_sup);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) struct hsr_priv {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	struct rcu_head		rcu_head;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	struct list_head	ports;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	struct list_head	node_db;	/* Known HSR nodes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	struct list_head	self_node_db;	/* MACs of slaves */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	struct timer_list	announce_timer;	/* Supervision frame dispatch */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	struct timer_list	prune_timer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	int announce_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	u16 sequence_nr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	u16 sup_sequence_nr;	/* For HSRv1 separate seq_nr for supervision */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	enum hsr_version prot_version;	/* Indicate if HSRv0, HSRv1 or PRPv1 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	spinlock_t seqnr_lock;	/* locking for sequence_nr */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	spinlock_t list_lock;	/* locking for node list */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	struct hsr_proto_ops	*proto_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) #define PRP_LAN_ID	0x5     /* 0x1010 for A and 0x1011 for B. Bit 0 is set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 				 * based on SLAVE_A or SLAVE_B
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 				 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	u8 net_id;		/* for PRP, it occupies most significant 3 bits
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 				 * of lan_id
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 				 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	unsigned char		sup_multicast_addr[ETH_ALEN];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) #ifdef	CONFIG_DEBUG_FS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	struct dentry *node_tbl_root;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) #define hsr_for_each_port(hsr, port) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	list_for_each_entry_rcu((port), &(hsr)->ports, port_list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) struct hsr_port *hsr_port_get_hsr(struct hsr_priv *hsr, enum hsr_port_type pt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) /* Caller must ensure skb is a valid HSR frame */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) static inline u16 hsr_get_skb_sequence_nr(struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	struct hsr_ethhdr *hsr_ethhdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	hsr_ethhdr = (struct hsr_ethhdr *)skb_mac_header(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	return ntohs(hsr_ethhdr->hsr_tag.sequence_nr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) static inline struct prp_rct *skb_get_PRP_rct(struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	unsigned char *tail = skb_tail_pointer(skb) - HSR_HLEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	struct prp_rct *rct = (struct prp_rct *)tail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	if (rct->PRP_suffix == htons(ETH_P_PRP))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 		return rct;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) /* Assume caller has confirmed this skb is PRP suffixed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) static inline u16 prp_get_skb_sequence_nr(struct prp_rct *rct)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	return ntohs(rct->sequence_nr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) static inline u16 get_prp_lan_id(struct prp_rct *rct)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	return ntohs(rct->lan_id_and_LSDU_size) >> 12;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) /* assume there is a valid rct */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) static inline bool prp_check_lsdu_size(struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 				       struct prp_rct *rct,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 				       bool is_sup)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	struct ethhdr *ethhdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 	int expected_lsdu_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 	if (is_sup) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 		expected_lsdu_size = HSR_V1_SUP_LSDUSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 		ethhdr = (struct ethhdr *)skb_mac_header(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 		expected_lsdu_size = skb->len - 14;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 		if (ethhdr->h_proto == htons(ETH_P_8021Q))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 			expected_lsdu_size -= 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 	return (expected_lsdu_size == get_prp_LSDU_size(rct));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) #if IS_ENABLED(CONFIG_DEBUG_FS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) void hsr_debugfs_rename(struct net_device *dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) void hsr_debugfs_init(struct hsr_priv *priv, struct net_device *hsr_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) void hsr_debugfs_term(struct hsr_priv *priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) void hsr_debugfs_create_root(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) void hsr_debugfs_remove_root(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) static inline void hsr_debugfs_rename(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) static inline void hsr_debugfs_init(struct hsr_priv *priv,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 				    struct net_device *hsr_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) {}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) static inline void hsr_debugfs_term(struct hsr_priv *priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) {}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) static inline void hsr_debugfs_create_root(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) {}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) static inline void hsr_debugfs_remove_root(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) {}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) #endif /*  __HSR_PRIVATE_H */