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*/
1 /*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * Definitions for the Interfaces handler.
7 *
8 * Version: @(#)dev.h 1.0.10 08/12/93
9 *
10 * Authors: Ross Biro, <bir7@leland.Stanford.Edu>
11 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12 * Corey Minyard <wf-rch!minyard@relay.EU.net>
13 * Donald J. Becker, <becker@super.org>
14 *
15 * This program is free software; you can redistribute it and/or
16 * modify it under the terms of the GNU General Public License
17 * as published by the Free Software Foundation; either version
18 * 2 of the License, or (at your option) any later version.
19 */
20 #ifndef _DEV_H
21 #define _DEV_H
22
23 #include <linux/if.h>
24 #include <linux/if_ether.h>
25
26
27 /* for future expansion when we will have different priorities. */
28 #define DEV_NUMBUFFS 3
29 #define MAX_ADDR_LEN 7
30 #define MAX_HEADER 18
31
32 #define IS_MYADDR 1 /* address is (one of) our own */
33 #define IS_LOOPBACK 2 /* address is for LOOPBACK */
34 #define IS_BROADCAST 3 /* address is a valid broadcast */
35 #define IS_INVBCAST 4 /* Wrong netmask bcast not for us */
36
37 /*
38 * The DEVICE structure.
39 * Actually, this whole structure is a big mistake. It mixes I/O
40 * data with strictly "high-level" data, and it has to know about
41 * almost every data structure used in the INET module. We will
42 * gradually phase out this structure, and replace it with the
43 * more general (but stolen :-) BSD "ifnet" structure. -FvK
44 */
45 struct device {
46
47 /*
48 * This is the first field of the "visible" part of this structure
49 * (i.e. as seen by users in the "Space.c" file). It is the name
50 * the interface.
51 */
52 char *name;
53
54 /* I/O specific fields. These will be moved to DDI soon. */
55 unsigned long rmem_end; /* shmem "recv" end */
56 unsigned long rmem_start; /* shmem "recv" start */
57 unsigned long mem_end; /* sahared mem end */
58 unsigned long mem_start; /* shared mem start */
59 unsigned short base_addr; /* device I/O address */
60 unsigned char irq; /* device IRQ number */
61
62 /* Low-level status flags. */
63 volatile unsigned char start, /* start an operation */
64 tbusy, /* transmitter busy */
65 interrupt; /* interrupt arrived */
66
67 /*
68 * Another mistake.
69 * This points to the next device in the "dev" chain. It will
70 * be moved to the "invisible" part of the structure as soon as
71 * it has been cleaned up. -FvK
72 */
73 struct device *next;
74
75 /* The device initialization function. Called only once. */
76 int (*init)(struct device *dev);
77
78 /* Some hardware also needs these fields, but they are not part of the
79 usual set specified in Space.c. */
80 unsigned char if_port; /* Selectable AUI, TP,..*/
81 unsigned char dma; /* DMA channel */
82
83 struct enet_statistics* (*get_stats)(struct device *dev);
84
85 /*
86 * This marks the end of the "visible" part of the structure. All
87 * fields hereafter are internal to the system, and may change at
88 * will (read: may be cleaned up at will).
89 */
90
91 /* These may be needed for future network-power-down code. */
92 unsigned long trans_start; /* Time (in jiffies) of last Tx */
93 unsigned long last_rx; /* Time of last Rx */
94
95 unsigned short flags; /* interface flags (a la BSD) */
96 unsigned short family; /* address family ID (AF_INET) */
97 unsigned short metric; /* routing metric (not used) */
98 unsigned short mtu; /* interface MTU value */
99 unsigned short type; /* interface hardware type */
100 unsigned short hard_header_len; /* hardware hdr length */
101 void *priv; /* pointer to private data */
102
103 /* Interface address info. */
104 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
105 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address */
106 unsigned char addr_len; /* harfware address length */
107 unsigned long pa_addr; /* protocol address */
108 unsigned long pa_brdaddr; /* protocol broadcast addr */
109 unsigned long pa_dstaddr; /* protocol P-P other side addr */
110 unsigned long pa_mask; /* protocol netmask */
111 unsigned short pa_alen; /* protocol address length */
112
113 /* Pointer to the interface buffers. */
114 struct sk_buff *volatile buffs[DEV_NUMBUFFS];
115
116 /* Pointers to interface service routines. */
117 int (*open)(struct device *dev);
118 int (*stop)(struct device *dev);
119 int (*hard_start_xmit) (struct sk_buff *skb,
120 struct device *dev);
121 int (*hard_header) (unsigned char *buff,
122 struct device *dev,
123 unsigned short type,
124 unsigned long daddr,
125 unsigned long saddr,
126 unsigned len);
127 void (*add_arp) (unsigned long addr,
128 struct sk_buff *skb,
129 struct device *dev);
130 void (*queue_xmit)(struct sk_buff *skb,
131 struct device *dev, int pri);
132 int (*rebuild_header)(void *eth, struct device *dev);
133 unsigned short (*type_trans) (struct sk_buff *skb,
134 struct device *dev);
135 #define HAVE_MULTICAST
136 void (*set_multicast_list)(struct device *dev,
137 int num_addrs, void *addrs);
138 #define HAVE_SET_MAC_ADDR
139 int (*set_mac_address)(struct device *dev, void *addr);
140 };
141
142
143 struct packet_type {
144 unsigned short type; /* This is really NET16(ether_type) other
145 * devices will have to translate
146 * appropriately.
147 */
148 unsigned short copy:1;
149 int (*func) (struct sk_buff *, struct device *,
150 struct packet_type *);
151 void *data;
152 struct packet_type *next;
153 };
154
155
156 /* Used by dev_rint */
157 #define IN_SKBUFF 1
158 #define DEV_QUEUE_MAGIC 0x17432895
159
160
161 extern struct device *dev_base;
162 extern struct packet_type *ptype_base;
163
164
165 extern int ip_addr_match(unsigned long addr1, unsigned long addr2);
166 extern int chk_addr(unsigned long addr);
167 extern struct device *dev_check(unsigned long daddr);
168 extern unsigned long my_addr(void);
169
170 extern void dev_add_pack(struct packet_type *pt);
171 extern void dev_remove_pack(struct packet_type *pt);
172 extern struct device *dev_get(char *name);
173 extern int dev_open(struct device *dev);
174 extern int dev_close(struct device *dev);
175 extern void dev_queue_xmit(struct sk_buff *skb, struct device *dev,
176 int pri);
177 #define HAVE_NETIF_RX 1
178 extern void netif_rx(struct sk_buff *skb);
179 /* The old interface to netif_rx(). */
180 extern int dev_rint(unsigned char *buff, long len, int flags,
181 struct device * dev);
182 extern void dev_transmit(void);
183 extern int in_inet_bh(void);
184 extern void inet_bh(void *tmp);
185 extern void dev_tint(struct device *dev);
186 extern int dev_get_info(char *buffer);
187 extern int dev_ioctl(unsigned int cmd, void *);
188
189 extern void dev_init(void);
190
191 #endif /* _DEV_H */
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*/