/* SPDX-License-Identifier: GPL-2.0-only *//* * Copyright (C) ST-Ericsson AB 2010 * Author:	Sjur Brendeland */ #ifndef CAIF_DEV_H_#define CAIF_DEV_H_ #include <net/caif/caif_layer.h>#include <net/caif/cfcnfg.h>#include <net/caif/caif_device.h>#include <linux/caif/caif_socket.h>#include <linux/if.h>#include <linux/net.h> /** * struct caif_param - CAIF parameters. * @size:	Length of data * @data:	Binary Data Blob */struct caif_param {	u16  size;	u8   data[256];}; /** * struct caif_connect_request - Request data for CAIF channel setup. * @protocol:		Type of CAIF protocol to use (at, datagram etc) * @sockaddr:		Socket address to connect. * @priority:		Priority of the connection. * @link_selector:	Link selector (high bandwidth or low latency) * @ifindex:		kernel index of the interface. * @param:		Connect Request parameters (CAIF_SO_REQ_PARAM). * * This struct is used when connecting a CAIF channel. * It contains all CAIF channel configuration options. */struct caif_connect_request {	enum caif_protocol_type protocol;	struct sockaddr_caif sockaddr;	enum caif_channel_priority priority;	enum caif_link_selector link_selector;	int ifindex;	struct caif_param param;}; /** * caif_connect_client - Connect a client to CAIF Core Stack. * @config:		Channel setup parameters, specifying what address *			to connect on the Modem. * @client_layer:	User implementation of client layer. This layer *			MUST have receive and control callback functions *			implemented. * @ifindex:		Link layer interface index used for this connection. * @headroom:		Head room needed by CAIF protocol. * @tailroom:		Tail room needed by CAIF protocol. * * This function connects a CAIF channel. The Client must implement * the struct cflayer. This layer represents the Client layer and holds * receive functions and control callback functions. Control callback * function will receive information about connect/disconnect responses, * flow control etc (see enum caif_control). * E.g. CAIF Socket will call this function for each socket it connects * and have one client_layer instance for each socket. */int caif_connect_client(struct net *net,			struct caif_connect_request *conn_req,			struct cflayer *client_layer, int *ifindex,			int *headroom, int *tailroom); /** * caif_disconnect_client - Disconnects a client from the CAIF stack. * * @client_layer: Client layer to be disconnected. */int caif_disconnect_client(struct net *net, struct cflayer *client_layer);  /** * caif_client_register_refcnt - register ref-count functions provided by client. * * @adapt_layer: Client layer using CAIF Stack. * @hold:	Function provided by client layer increasing ref-count * @put:	Function provided by client layer decreasing ref-count * * Client of the CAIF Stack must register functions for reference counting. * These functions are called by the CAIF Stack for every upstream packet, * and must therefore be implemented efficiently. * * Client should call caif_free_client when reference count degrease to zero. */ void caif_client_register_refcnt(struct cflayer *adapt_layer,					void (*hold)(struct cflayer *lyr),					void (*put)(struct cflayer *lyr));/** * caif_free_client - Free memory used to manage the client in the CAIF Stack. * * @client_layer: Client layer to be removed. * * This function must be called from client layer in order to free memory. * Caller must guarantee that no packets are in flight upstream when calling * this function. */void caif_free_client(struct cflayer *adap_layer); /** * struct caif_enroll_dev - Enroll a net-device as a CAIF Link layer * @dev:		Network device to enroll. * @caifdev:		Configuration information from CAIF Link Layer * @link_support:	Link layer support layer * @head_room:		Head room needed by link support layer * @layer:		Lowest layer in CAIF stack * @rcv_fun:		Receive function for CAIF stack. * * This function enroll a CAIF link layer into CAIF Stack and * expects the interface to be able to handle CAIF payload. * The link_support layer is used to add any Link Layer specific * framing. */int caif_enroll_dev(struct net_device *dev, struct caif_dev_common *caifdev,			struct cflayer *link_support, int head_room,			struct cflayer **layer, int (**rcv_func)(				struct sk_buff *, struct net_device *,				struct packet_type *, struct net_device *)); #endif /* CAIF_DEV_H_ */