diff options
Diffstat (limited to 'include/linux/if_hsr.h')
| -rw-r--r-- | include/linux/if_hsr.h | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/include/linux/if_hsr.h b/include/linux/if_hsr.h new file mode 100644 index 000000000000..0404f5bf4f30 --- /dev/null +++ b/include/linux/if_hsr.h @@ -0,0 +1,47 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _LINUX_IF_HSR_H_ +#define _LINUX_IF_HSR_H_ + +#include <linux/types.h> + +struct net_device; + +/* used to differentiate various protocols */ +enum hsr_version { + HSR_V0 = 0, + HSR_V1, + PRP_V1, +}; + +/* 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_HLEN 6 + +#if IS_ENABLED(CONFIG_HSR) +extern bool is_hsr_master(struct net_device *dev); +extern int hsr_get_version(struct net_device *dev, enum hsr_version *ver); +#else +static inline bool is_hsr_master(struct net_device *dev) +{ + return false; +} +static inline int hsr_get_version(struct net_device *dev, + enum hsr_version *ver) +{ + return -EINVAL; +} +#endif /* CONFIG_HSR */ + +#endif /*_LINUX_IF_HSR_H_*/ |