1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3 * DLCI/FRAD Definitions for Frame Relay Access Devices. DLCI devices are
4 * created for each DLCI associated with a FRAD. The FRAD driver
5 * is not truly a network device, but the lower level device
6 * handler. This allows other FRAD manufacturers to use the DLCI
7 * code, including its RFC1490 encapsulation alongside the current
8 * implementation for the Sangoma cards.
9 *
10 * Version: @(#)if_ifrad.h 0.15 31 Mar 96
11 *
12 * Author: Mike McLagan <mike.mclagan@linux.org>
13 *
14 * Changes:
15 * 0.15 Mike McLagan changed structure defs (packed)
16 * re-arranged flags
17 * added DLCI_RET vars
18 */
19 #ifndef _FRAD_H_
20 #define _FRAD_H_
21
22 #include <uapi/linux/if_frad.h>
23
24
25 #if defined(CONFIG_DLCI) || defined(CONFIG_DLCI_MODULE)
26
27 /* these are the fields of an RFC 1490 header */
28 struct frhdr
29 {
30 unsigned char control;
31
32 /* for IP packets, this can be the NLPID */
33 unsigned char pad;
34
35 unsigned char NLPID;
36 unsigned char OUI[3];
37 __be16 PID;
38
39 #define IP_NLPID pad
40 } __packed;
41
42 /* see RFC 1490 for the definition of the following */
43 #define FRAD_I_UI 0x03
44
45 #define FRAD_P_PADDING 0x00
46 #define FRAD_P_Q933 0x08
47 #define FRAD_P_SNAP 0x80
48 #define FRAD_P_CLNP 0x81
49 #define FRAD_P_IP 0xCC
50
51 struct dlci_local
52 {
53 struct net_device *master;
54 struct net_device *slave;
55 struct dlci_conf config;
56 int configured;
57 struct list_head list;
58
59 /* callback function */
60 void (*receive)(struct sk_buff *skb, struct net_device *);
61 };
62
63 struct frad_local
64 {
65 /* devices which this FRAD is slaved to */
66 struct net_device *master[CONFIG_DLCI_MAX];
67 short dlci[CONFIG_DLCI_MAX];
68
69 struct frad_conf config;
70 int configured; /* has this device been configured */
71 int initialized; /* mem_start, port, irq set ? */
72
73 /* callback functions */
74 int (*activate)(struct net_device *, struct net_device *);
75 int (*deactivate)(struct net_device *, struct net_device *);
76 int (*assoc)(struct net_device *, struct net_device *);
77 int (*deassoc)(struct net_device *, struct net_device *);
78 int (*dlci_conf)(struct net_device *, struct net_device *, int get);
79
80 /* fields that are used by the Sangoma SDLA cards */
81 struct timer_list timer;
82 struct net_device *dev;
83 int type; /* adapter type */
84 int state; /* state of the S502/8 control latch */
85 int buffer; /* current buffer for S508 firmware */
86 };
87
88 #endif /* CONFIG_DLCI || CONFIG_DLCI_MODULE */
89
90 extern void dlci_ioctl_set(int (*hook)(unsigned int, void __user *));
91
92 #endif