include/linux/if_frad.h

   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