1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _LINUX_IF_HSR_H_ 3 #define _LINUX_IF_HSR_H_ 4 5 /* used to differentiate various protocols */ 6 enum hsr_version { 7 HSR_V0 = 0, 8 HSR_V1, 9 PRP_V1, 10 }; 11 12 /* HSR Tag. 13 * As defined in IEC-62439-3:2010, the HSR tag is really { ethertype = 0x88FB, 14 * path, LSDU_size, sequence Nr }. But we let eth_header() create { h_dest, 15 * h_source, h_proto = 0x88FB }, and add { path, LSDU_size, sequence Nr, 16 * encapsulated protocol } instead. 17 * 18 * Field names as defined in the IEC:2010 standard for HSR. 19 */ 20 struct hsr_tag { 21 __be16 path_and_LSDU_size; 22 __be16 sequence_nr; 23 __be16 encap_proto; 24 } __packed; 25 26 #define HSR_HLEN 6 27 28 #if IS_ENABLED(CONFIG_HSR) 29 extern bool is_hsr_master(struct net_device *dev); 30 extern int hsr_get_version(struct net_device *dev, enum hsr_version *ver); 31 #else 32 static inline bool is_hsr_master(struct net_device *dev) 33 { 34 return false; 35 } 36 static inline int hsr_get_version(struct net_device *dev, 37 enum hsr_version *ver) 38 { 39 return -EINVAL; 40 } 41 #endif /* CONFIG_HSR */ 42 43 #endif /*_LINUX_IF_HSR_H_*/ 44