| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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| 2 | #ifndef _LINUX_IF_HSR_H_ |
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| 3 | #define _LINUX_IF_HSR_H_ |
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| 4 | |
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| 5 | #include <linux/types.h> |
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| 6 | |
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| 7 | struct net_device; |
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| 8 | |
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| 9 | /* used to differentiate various protocols */ |
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| 10 | enum hsr_version { |
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| 11 | HSR_V0 = 0, |
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| 12 | HSR_V1, |
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| 13 | PRP_V1, |
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| 14 | }; |
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| 15 | |
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| 16 | enum hsr_port_type { |
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| 17 | HSR_PT_NONE = 0, /* Must be 0, used by framereg */ |
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| 18 | HSR_PT_SLAVE_A, |
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| 19 | HSR_PT_SLAVE_B, |
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| 20 | HSR_PT_INTERLINK, |
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| 21 | HSR_PT_MASTER, |
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| 22 | HSR_PT_PORTS, /* This must be the last item in the enum */ |
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| 23 | }; |
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| 24 | |
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| 25 | /* HSR Tag. |
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| 26 | * As defined in IEC-62439-3:2010, the HSR tag is really { ethertype = 0x88FB, |
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| 27 | * path, LSDU_size, sequence Nr }. But we let eth_header() create { h_dest, |
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| 28 | * h_source, h_proto = 0x88FB }, and add { path, LSDU_size, sequence Nr, |
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| 29 | * encapsulated protocol } instead. |
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| 30 | * |
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| 31 | * Field names as defined in the IEC:2010 standard for HSR. |
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| 32 | */ |
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| 33 | struct hsr_tag { |
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| 34 | __be16 path_and_LSDU_size; |
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| 35 | __be16 sequence_nr; |
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| 36 | __be16 encap_proto; |
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| 37 | } __packed; |
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| 38 | |
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| 39 | #define HSR_HLEN 6 |
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| 40 | |
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| 41 | #if IS_ENABLED(CONFIG_HSR) |
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| 42 | extern bool is_hsr_master(struct net_device *dev); |
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| 43 | extern int hsr_get_version(struct net_device *dev, enum hsr_version *ver); |
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| 44 | struct net_device *hsr_get_port_ndev(struct net_device *ndev, |
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| 45 | enum hsr_port_type pt); |
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| 46 | #else |
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| 47 | static inline bool is_hsr_master(struct net_device *dev) |
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| 48 | { |
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| 49 | return false; |
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| 50 | } |
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| 51 | static inline int hsr_get_version(struct net_device *dev, |
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| 52 | enum hsr_version *ver) |
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| 53 | { |
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| 54 | return -EINVAL; |
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| 55 | } |
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| 56 | |
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| 57 | static inline struct net_device *hsr_get_port_ndev(struct net_device *ndev, |
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| 58 | enum hsr_port_type pt) |
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| 59 | { |
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| 60 | return ERR_PTR(-EINVAL); |
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| 61 | } |
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| 62 | #endif /* CONFIG_HSR */ |
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| 63 | |
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| 64 | #endif /*_LINUX_IF_HSR_H_*/ |
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| 65 | |
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