NetBSD/sys/netisdn/i4b_l1l2.h

86 lines
3.3 KiB
C

/* $NetBSD: i4b_l1l2.h,v 1.13 2008/04/28 20:24:10 martin Exp $ */
/*-
* Copyright (c) 2002 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Martin Husemann <martin@NetBSD.org>.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _NETISDN_I4B_L1L2_H_
#define _NETISDN_I4B_L1L2_H_
/*
* This file defines the D-channel interface between layer 1 (physical
* card hardware) and layer 2 of a passive ISDN card (i.e. a card that
* does not run it's own ISDN stack in firmware).
*
* Since each layer 1 driver knows in advance it will need to attach
* to this layer 2, the whole layer 2 softc struct is typically included
* in the layer 1 softc.
*
* A back-pointer to the layer 1 softc is included (as void*) in this
* structure.
*/
typedef void *isdn_layer1token;
/*
* Each driver attaching to layer 2 via this interface provides a pointer
* to a struct of function pointers used to communicate with layer 1, while
* layer 1 calls layer 2 functions directly (see below).
*
* Layer 1 functions called from layer 2:
*/
struct isdn_layer1_isdnif_driver {
/* Request to transmit data. */
int (*ph_data_req)(isdn_layer1token, struct mbuf *, int);
/* Request to activate layer 1. */
int (*ph_activate_req)(isdn_layer1token);
/* Request to execute an internal command. */
int (*mph_command_req)(isdn_layer1token, int, void *);
};
/*
* Layer 2 functions called by layer 1:
*/
/* Process a rx'd frame */
int isdn_layer2_data_ind(struct l2_softc * t, struct isdn_l3_driver *, struct mbuf *m);
/* Pass a layer 1 activation/deactivation to layer 2. */
int isdn_layer2_activate_ind(struct l2_softc *, struct isdn_l3_driver *, int);
/* Pass trace data to layer 2. */
struct i4b_trace_hdr; /* from i4b_trace.h */
int isdn_layer2_trace_ind(struct l2_softc *, struct isdn_l3_driver *, struct i4b_trace_hdr *, size_t, unsigned char *);
/* Pass status informations to layer 2. */
int isdn_layer2_status_ind(struct l2_softc *, struct isdn_l3_driver *, int, int);
#endif /* !_NETISDN_I4B_L1L2_H_ */