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gsmmux.h
/* 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
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