129 lines
4.3 KiB
C
129 lines
4.3 KiB
C
|
/*
|
||
|
|
* Copyright (C) ST-Ericsson AB 2010
|
||
|
|
* Author: Sjur Brendeland
|
||
|
|
* License terms: GNU General Public License (GPL) version 2
|
||
|
|
*/
|
||
|
|
|
||
|
|
#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.
|
||
|
|
*/
|
||
|
|
void 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_ */
|