/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note *//* Copyright (c) 2022/23 Siemens Mobility GmbH */#ifndef _LINUX_GSMMUX_H#define _LINUX_GSMMUX_H #include <linux/const.h>#include <linux/if.h>#include <linux/ioctl.h>#include <linux/types.h> /* * flags definition for n_gsm * * Used by: * struct gsm_config_ext.flags * struct gsm_dlci_config.flags *//* Forces a DLCI reset if set. Otherwise, a DLCI reset is only done if * incompatible settings were provided. Always cleared on retrieval. */#define GSM_FL_RESTART	_BITUL(0) /** * struct gsm_config - n_gsm basic configuration parameters * * This structure is used in combination with GSMIOC_GETCONF and GSMIOC_SETCONF * to retrieve and set the basic parameters of an n_gsm ldisc. * struct gsm_config_ext can be used to configure extended ldisc parameters. * * All timers are in units of 1/100th of a second. * * @adaption:      Convergence layer type * @encapsulation: Framing (0 = basic option, 1 = advanced option) * @initiator:     Initiator or responder * @t1:            Acknowledgment timer * @t2:            Response timer for multiplexer control channel * @t3:            Response timer for wake-up procedure * @n2:            Maximum number of retransmissions * @mru:           Maximum incoming frame payload size * @mtu:           Maximum outgoing frame payload size * @k:             Window size * @i:             Frame type (1 = UIH, 2 = UI) * @unused:        Can not be used */struct gsm_config{	unsigned int adaption;	unsigned int encapsulation;	unsigned int initiator;	unsigned int t1;	unsigned int t2;	unsigned int t3;	unsigned int n2;	unsigned int mru;	unsigned int mtu;	unsigned int k;	unsigned int i;	unsigned int unused[8];}; #define GSMIOC_GETCONF		_IOR('G', 0, struct gsm_config)#define GSMIOC_SETCONF		_IOW('G', 1, struct gsm_config) /** * struct gsm_netconfig - n_gsm network configuration parameters * * This structure is used in combination with GSMIOC_ENABLE_NET and * GSMIOC_DISABLE_NET to enable or disable a network data connection * over a mux virtual tty channel. This is for modems that support * data connections with raw IP frames instead of PPP. * * @adaption: Adaption to use in network mode. * @protocol: Protocol to use - only ETH_P_IP supported. * @unused2:  Can not be used. * @if_name:  Interface name format string. * @unused:   Can not be used. */struct gsm_netconfig {	unsigned int adaption;	unsigned short protocol;	unsigned short unused2;	char if_name[IFNAMSIZ];	__u8 unused[28];}; #define GSMIOC_ENABLE_NET      _IOW('G', 2, struct gsm_netconfig)#define GSMIOC_DISABLE_NET     _IO('G', 3) /* get the base tty number for a configured gsmmux tty */#define GSMIOC_GETFIRST		_IOR('G', 4, __u32) /** * struct gsm_config_ext - n_gsm extended configuration parameters * * This structure is used in combination with GSMIOC_GETCONF_EXT and * GSMIOC_SETCONF_EXT to retrieve and set the extended parameters of an * n_gsm ldisc. * * All timers are in units of 1/100th of a second. * * @keep_alive:  Control channel keep-alive in 1/100th of a second (0 to disable). * @wait_config: Wait for DLCI config before opening virtual link? * @flags:       Mux specific flags. * @reserved:    For future use, must be initialized to zero. */struct gsm_config_ext {	__u32 keep_alive;	__u32 wait_config;	__u32 flags;	__u32 reserved[5];}; #define GSMIOC_GETCONF_EXT	_IOR('G', 5, struct gsm_config_ext)#define GSMIOC_SETCONF_EXT	_IOW('G', 6, struct gsm_config_ext) /** * struct gsm_dlci_config - n_gsm channel configuration parameters * * This structure is used in combination with GSMIOC_GETCONF_DLCI and * GSMIOC_SETCONF_DLCI to retrieve and set the channel specific parameters * of an n_gsm ldisc. * * Set the channel accordingly before calling GSMIOC_GETCONF_DLCI. * * @channel:  DLCI (0 for the associated DLCI). * @adaption: Convergence layer type. * @mtu:      Maximum transfer unit. * @priority: Priority (0 for default value). * @i:        Frame type (1 = UIH, 2 = UI). * @k:        Window size (0 for default value). * @flags:    DLCI specific flags. * @reserved: For future use, must be initialized to zero. */struct gsm_dlci_config {	__u32 channel;	__u32 adaption;	__u32 mtu;	__u32 priority;	__u32 i;	__u32 k;	__u32 flags;	__u32 reserved[7];}; #define GSMIOC_GETCONF_DLCI	_IOWR('G', 7, struct gsm_dlci_config)#define GSMIOC_SETCONF_DLCI	_IOW('G', 8, struct gsm_dlci_config) #endif