if_hsr.h

 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
 7struct net_device;
 8
 9/* used to differentiate various protocols */
10enum hsr_version {
11	HSR_V0 = 0,
12	HSR_V1,
13	PRP_V1,
14};
15
16enum hsr_port_type {
17	HSR_PT_NONE = 0,	/* Must be 0, used by framereg */
18	HSR_PT_SLAVE_A,
19	HSR_PT_SLAVE_B,
20	HSR_PT_INTERLINK,
21	HSR_PT_MASTER,
22	HSR_PT_PORTS,	/* This must be the last item in the enum */
23};
24
25/* HSR Tag.
26 * As defined in IEC-62439-3:2010, the HSR tag is really { ethertype = 0x88FB,
27 * path, LSDU_size, sequence Nr }. But we let eth_header() create { h_dest,
28 * h_source, h_proto = 0x88FB }, and add { path, LSDU_size, sequence Nr,
29 * encapsulated protocol } instead.
30 *
31 * Field names as defined in the IEC:2010 standard for HSR.
32 */
33struct hsr_tag {
34	__be16		path_and_LSDU_size;
35	__be16		sequence_nr;
36	__be16		encap_proto;
37} __packed;
38
39#define HSR_HLEN	6
40
41#if IS_ENABLED(CONFIG_HSR)
42extern bool is_hsr_master(struct net_device *dev);
43extern int hsr_get_version(struct net_device *dev, enum hsr_version *ver);
44struct net_device *hsr_get_port_ndev(struct net_device *ndev,
45				     enum hsr_port_type pt);
46int hsr_get_port_type(struct net_device *hsr_dev, struct net_device *dev,
47		      enum hsr_port_type *type);
48#else
49static inline bool is_hsr_master(struct net_device *dev)
50{
51	return false;
52}
53static inline int hsr_get_version(struct net_device *dev,
54				  enum hsr_version *ver)
55{
56	return -EINVAL;
57}
58
59static inline struct net_device *hsr_get_port_ndev(struct net_device *ndev,
60						   enum hsr_port_type pt)
61{
62	return ERR_PTR(-EINVAL);
63}
64
65static inline int hsr_get_port_type(struct net_device *hsr_dev,
66				    struct net_device *dev,
67				    enum hsr_port_type *type)
68{
69	return -EINVAL;
70}
71#endif /* CONFIG_HSR */
72
73#endif /*_LINUX_IF_HSR_H_*/