LXR linux/include/linux/if

   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 */
  28struct 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
  51struct 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
  63struct 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
  90extern void dlci_ioctl_set(int (*hook)(unsigned int, void __user *));
  91
  92#endif
  93