1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #ifndef _LINUX_IF_HSR_H_ |
3 | #define _LINUX_IF_HSR_H_ |
4 | |
5 | #include <linux/types.h> |
6 | |
7 | struct net_device; |
8 | |
9 | /* used to differentiate various protocols */ |
10 | enum hsr_version { |
11 | HSR_V0 = 0, |
12 | HSR_V1, |
13 | PRP_V1, |
14 | }; |
15 | |
16 | /* HSR Tag. |
17 | * As defined in IEC-62439-3:2010, the HSR tag is really { ethertype = 0x88FB, |
18 | * path, LSDU_size, sequence Nr }. But we let eth_header() create { h_dest, |
19 | * h_source, h_proto = 0x88FB }, and add { path, LSDU_size, sequence Nr, |
20 | * encapsulated protocol } instead. |
21 | * |
22 | * Field names as defined in the IEC:2010 standard for HSR. |
23 | */ |
24 | struct hsr_tag { |
25 | __be16 path_and_LSDU_size; |
26 | __be16 sequence_nr; |
27 | __be16 encap_proto; |
28 | } __packed; |
29 | |
30 | #define HSR_HLEN 6 |
31 | |
32 | #if IS_ENABLED(CONFIG_HSR) |
33 | extern bool is_hsr_master(struct net_device *dev); |
34 | extern int hsr_get_version(struct net_device *dev, enum hsr_version *ver); |
35 | #else |
36 | static inline bool is_hsr_master(struct net_device *dev) |
37 | { |
38 | return false; |
39 | } |
40 | static inline int hsr_get_version(struct net_device *dev, |
41 | enum hsr_version *ver) |
42 | { |
43 | return -EINVAL; |
44 | } |
45 | #endif /* CONFIG_HSR */ |
46 | |
47 | #endif /*_LINUX_IF_HSR_H_*/ |
48 | |