xref: /openbmc/linux/include/uapi/linux/atmbr2684.h (revision 7fac54b9)
1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 #ifndef _LINUX_ATMBR2684_H
3 #define _LINUX_ATMBR2684_H
4 
5 #include <linux/types.h>
6 #include <linux/atm.h>
7 #include <linux/if.h>		/* For IFNAMSIZ */
8 
9 /*
10  * Type of media we're bridging (ethernet, token ring, etc)  Currently only
11  * ethernet is supported
12  */
13 #define BR2684_MEDIA_ETHERNET	(0)	/* 802.3 */
14 #define BR2684_MEDIA_802_4	(1)	/* 802.4 */
15 #define BR2684_MEDIA_TR		(2)	/* 802.5 - token ring */
16 #define BR2684_MEDIA_FDDI	(3)
17 #define BR2684_MEDIA_802_6	(4)	/* 802.6 */
18 
19 					/* used only at device creation:  */
20 #define BR2684_FLAG_ROUTED	(1<<16)	/* payload is routed, not bridged */
21 
22 /*
23  * Is there FCS inbound on this VC?  This currently isn't supported.
24  */
25 #define BR2684_FCSIN_NO		(0)
26 #define BR2684_FCSIN_IGNORE	(1)
27 #define BR2684_FCSIN_VERIFY	(2)
28 
29 /*
30  * Is there FCS outbound on this VC?  This currently isn't supported.
31  */
32 #define BR2684_FCSOUT_NO	(0)
33 #define BR2684_FCSOUT_SENDZERO	(1)
34 #define BR2684_FCSOUT_GENERATE	(2)
35 
36 /*
37  * Does this VC include LLC encapsulation?
38  */
39 #define BR2684_ENCAPS_VC	(0)	/* VC-mux */
40 #define BR2684_ENCAPS_LLC	(1)
41 #define BR2684_ENCAPS_AUTODETECT (2)	/* Unsupported */
42 
43 /*
44  * Is this VC bridged or routed?
45  */
46 
47 #define BR2684_PAYLOAD_ROUTED   (0)
48 #define BR2684_PAYLOAD_BRIDGED  (1)
49 
50 /*
51  * This is for the ATM_NEWBACKENDIF call - these are like socket families:
52  * the first element of the structure is the backend number and the rest
53  * is per-backend specific
54  */
55 struct atm_newif_br2684 {
56 	atm_backend_t backend_num;	/* ATM_BACKEND_BR2684 */
57 	int media;		/* BR2684_MEDIA_*, flags in upper bits */
58 	char ifname[IFNAMSIZ];
59 	int mtu;
60 };
61 
62 /*
63  * This structure is used to specify a br2684 interface - either by a
64  * positive integer (returned by ATM_NEWBACKENDIF) or the interfaces name
65  */
66 #define BR2684_FIND_BYNOTHING	(0)
67 #define BR2684_FIND_BYNUM	(1)
68 #define BR2684_FIND_BYIFNAME	(2)
69 struct br2684_if_spec {
70 	int method;		/* BR2684_FIND_* */
71 	union {
72 		char ifname[IFNAMSIZ];
73 		int devnum;
74 	} spec;
75 };
76 
77 /*
78  * This is for the ATM_SETBACKEND call - these are like socket families:
79  * the first element of the structure is the backend number and the rest
80  * is per-backend specific
81  */
82 struct atm_backend_br2684 {
83 	atm_backend_t backend_num;	/* ATM_BACKEND_BR2684 */
84 	struct br2684_if_spec ifspec;
85 	int fcs_in;		/* BR2684_FCSIN_* */
86 	int fcs_out;		/* BR2684_FCSOUT_* */
87 	int fcs_auto;		/* 1: fcs_{in,out} disabled if no FCS rx'ed */
88 	int encaps;		/* BR2684_ENCAPS_* */
89 	int has_vpiid;		/* 1: use vpn_id - Unsupported */
90 	__u8 vpn_id[7];
91 	int send_padding;	/* unsupported */
92 	int min_size;		/* we will pad smaller packets than this */
93 };
94 
95 /*
96  * The BR2684_SETFILT ioctl is an experimental mechanism for folks
97  * terminating a large number of IP-only vcc's.  When netfilter allows
98  * efficient per-if in/out filters, this support will be removed
99  */
100 struct br2684_filter {
101 	__be32 prefix;		/* network byte order */
102 	__be32 netmask;		/* 0 = disable filter */
103 };
104 
105 struct br2684_filter_set {
106 	struct br2684_if_spec ifspec;
107 	struct br2684_filter filter;
108 };
109 
110 enum br2684_payload {
111 	p_routed = BR2684_PAYLOAD_ROUTED,
112 	p_bridged = BR2684_PAYLOAD_BRIDGED,
113 };
114 
115 #define BR2684_SETFILT	_IOW( 'a', ATMIOC_BACKEND + 0, \
116 				struct br2684_filter_set)
117 
118 #endif /* _LINUX_ATMBR2684_H */
119