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1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */2/* Copyright (c) 2022/23 Siemens Mobility GmbH */3#ifndef _LINUX_GSMMUX_H4#define _LINUX_GSMMUX_H5 6#include <linux/const.h>7#include <linux/if.h>8#include <linux/ioctl.h>9#include <linux/types.h>10 11/*12 * flags definition for n_gsm13 *14 * Used by:15 * struct gsm_config_ext.flags16 * struct gsm_dlci_config.flags17 */18/* Forces a DLCI reset if set. Otherwise, a DLCI reset is only done if19 * incompatible settings were provided. Always cleared on retrieval.20 */21#define GSM_FL_RESTART _BITUL(0)22 23/**24 * struct gsm_config - n_gsm basic configuration parameters25 *26 * This structure is used in combination with GSMIOC_GETCONF and GSMIOC_SETCONF27 * to retrieve and set the basic parameters of an n_gsm ldisc.28 * struct gsm_config_ext can be used to configure extended ldisc parameters.29 *30 * All timers are in units of 1/100th of a second.31 *32 * @adaption: Convergence layer type33 * @encapsulation: Framing (0 = basic option, 1 = advanced option)34 * @initiator: Initiator or responder35 * @t1: Acknowledgment timer36 * @t2: Response timer for multiplexer control channel37 * @t3: Response timer for wake-up procedure38 * @n2: Maximum number of retransmissions39 * @mru: Maximum incoming frame payload size40 * @mtu: Maximum outgoing frame payload size41 * @k: Window size42 * @i: Frame type (1 = UIH, 2 = UI)43 * @unused: Can not be used44 */45struct gsm_config46{47 unsigned int adaption;48 unsigned int encapsulation;49 unsigned int initiator;50 unsigned int t1;51 unsigned int t2;52 unsigned int t3;53 unsigned int n2;54 unsigned int mru;55 unsigned int mtu;56 unsigned int k;57 unsigned int i;58 unsigned int unused[8];59};60 61#define GSMIOC_GETCONF _IOR('G', 0, struct gsm_config)62#define GSMIOC_SETCONF _IOW('G', 1, struct gsm_config)63 64/**65 * struct gsm_netconfig - n_gsm network configuration parameters66 *67 * This structure is used in combination with GSMIOC_ENABLE_NET and68 * GSMIOC_DISABLE_NET to enable or disable a network data connection69 * over a mux virtual tty channel. This is for modems that support70 * data connections with raw IP frames instead of PPP.71 *72 * @adaption: Adaption to use in network mode.73 * @protocol: Protocol to use - only ETH_P_IP supported.74 * @unused2: Can not be used.75 * @if_name: Interface name format string.76 * @unused: Can not be used.77 */78struct gsm_netconfig {79 unsigned int adaption;80 unsigned short protocol;81 unsigned short unused2;82 char if_name[IFNAMSIZ];83 __u8 unused[28];84};85 86#define GSMIOC_ENABLE_NET _IOW('G', 2, struct gsm_netconfig)87#define GSMIOC_DISABLE_NET _IO('G', 3)88 89/* get the base tty number for a configured gsmmux tty */90#define GSMIOC_GETFIRST _IOR('G', 4, __u32)91 92/**93 * struct gsm_config_ext - n_gsm extended configuration parameters94 *95 * This structure is used in combination with GSMIOC_GETCONF_EXT and96 * GSMIOC_SETCONF_EXT to retrieve and set the extended parameters of an97 * n_gsm ldisc.98 *99 * All timers are in units of 1/100th of a second.100 *101 * @keep_alive: Control channel keep-alive in 1/100th of a second (0 to disable).102 * @wait_config: Wait for DLCI config before opening virtual link?103 * @flags: Mux specific flags.104 * @reserved: For future use, must be initialized to zero.105 */106struct gsm_config_ext {107 __u32 keep_alive;108 __u32 wait_config;109 __u32 flags;110 __u32 reserved[5];111};112 113#define GSMIOC_GETCONF_EXT _IOR('G', 5, struct gsm_config_ext)114#define GSMIOC_SETCONF_EXT _IOW('G', 6, struct gsm_config_ext)115 116/**117 * struct gsm_dlci_config - n_gsm channel configuration parameters118 *119 * This structure is used in combination with GSMIOC_GETCONF_DLCI and120 * GSMIOC_SETCONF_DLCI to retrieve and set the channel specific parameters121 * of an n_gsm ldisc.122 *123 * Set the channel accordingly before calling GSMIOC_GETCONF_DLCI.124 *125 * @channel: DLCI (0 for the associated DLCI).126 * @adaption: Convergence layer type.127 * @mtu: Maximum transfer unit.128 * @priority: Priority (0 for default value).129 * @i: Frame type (1 = UIH, 2 = UI).130 * @k: Window size (0 for default value).131 * @flags: DLCI specific flags.132 * @reserved: For future use, must be initialized to zero.133 */134struct gsm_dlci_config {135 __u32 channel;136 __u32 adaption;137 __u32 mtu;138 __u32 priority;139 __u32 i;140 __u32 k;141 __u32 flags;142 __u32 reserved[7];143};144 145#define GSMIOC_GETCONF_DLCI _IOWR('G', 7, struct gsm_dlci_config)146#define GSMIOC_SETCONF_DLCI _IOW('G', 8, struct gsm_dlci_config)147 148#endif149