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      1 /*	$NetBSD: netif.h,v 1.8 2024/02/27 16:09:19 christos Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2024 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     26  * POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #ifndef __SYS_LIBNETBOOT_NETIF_H
     30 #define __SYS_LIBNETBOOT_NETIF_H
     31 
     32 #include "iodesc.h"
     33 
     34 struct netif; /* forward */
     35 
     36 struct netif_driver {
     37 	char	*netif_bname;
     38 	int	(*netif_match)(struct netif *, void *);
     39 	int	(*netif_probe)(struct netif *, void *);
     40 	void	(*netif_init)(struct iodesc *, void *);
     41 	int	(*netif_get)(struct iodesc *, void *, size_t, saseconds_t);
     42 	int	(*netif_put)(struct iodesc *, void *, size_t);
     43 	void	(*netif_end)(struct netif *);
     44 	struct	netif_dif *netif_ifs;
     45 	int	netif_nifs;
     46 };
     47 
     48 struct netif_dif {
     49 	int		dif_unit;
     50 	int		dif_nsel;
     51 	struct netif_stats *dif_stats;
     52 	void		*dif_private;
     53 	/* the following fields are used internally by the netif layer */
     54 	u_long		dif_used;
     55 };
     56 
     57 struct netif_stats {
     58 	int	collisions;
     59 	int	collision_error;
     60 	int	missed;
     61 	int	sent;
     62 	int	received;
     63 	int	deferred;
     64 	int	overflow;
     65 };
     66 
     67 struct netif {
     68 	struct netif_driver	*nif_driver;
     69 	int			nif_unit;
     70 	int			nif_sel;
     71 	void			*nif_devdata;
     72 };
     73 
     74 extern struct netif_driver	*netif_drivers[];	/* machdep */
     75 extern int			n_netif_drivers;
     76 
     77 extern int			netif_debug;
     78 
     79 void		netif_init(void);
     80 struct netif	*netif_select(void *);
     81 int		netif_probe(struct netif *, void *);
     82 void		netif_attach(struct netif *, struct iodesc *, void *);
     83 void		netif_detach(struct netif *);
     84 
     85 int		netif_open(void *);
     86 int		netif_close(int);
     87 
     88 #endif /* __SYS_LIBNETBOOT_NETIF_H */
     89