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[davej-history.git] / include / linux / netdevice.h
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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.
6 * Definitions for the Interfaces handler.
8 * Version: @(#)dev.h 1.0.10 08/12/93
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@cesdis.gsfc.nasa.gov>
14 * Alan Cox, <Alan.Cox@linux.org>
15 * Bjorn Ekwall. <bj0rn@blox.se>
17 * This program is free software; you can redistribute it and/or
18 * modify it under the terms of the GNU General Public License
19 * as published by the Free Software Foundation; either version
20 * 2 of the License, or (at your option) any later version.
22 * Moved to /usr/include/linux for NET3
24 #ifndef _LINUX_NETDEVICE_H
25 #define _LINUX_NETDEVICE_H
27 #include <linux/config.h>
28 #include <linux/if.h>
29 #include <linux/if_ether.h>
30 #include <linux/if_packet.h>
32 #include <asm/atomic.h>
34 #ifdef __KERNEL__
35 #ifdef CONFIG_NET_PROFILE
36 #include <net/profile.h>
37 #endif
38 #endif
41 * For future expansion when we will have different priorities.
44 #define MAX_ADDR_LEN 7 /* Largest hardware address length */
47 * Compute the worst case header length according to the protocols
48 * used.
51 #if !defined(CONFIG_AX25) && !defined(CONFIG_AX25_MODULE) && !defined(CONFIG_TR)
52 #define LL_MAX_HEADER 32
53 #else
54 #if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
55 #define LL_MAX_HEADER 96
56 #else
57 #define LL_MAX_HEADER 48
58 #endif
59 #endif
61 #if !defined(CONFIG_NET_IPIP) && \
62 !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE)
63 #define MAX_HEADER LL_MAX_HEADER
64 #else
65 #define MAX_HEADER (LL_MAX_HEADER + 48)
66 #endif
69 * Network device statistics. Akin to the 2.0 ether stats but
70 * with byte counters.
73 struct net_device_stats
75 unsigned long rx_packets; /* total packets received */
76 unsigned long tx_packets; /* total packets transmitted */
77 unsigned long rx_bytes; /* total bytes received */
78 unsigned long tx_bytes; /* total bytes transmitted */
79 unsigned long rx_errors; /* bad packets received */
80 unsigned long tx_errors; /* packet transmit problems */
81 unsigned long rx_dropped; /* no space in linux buffers */
82 unsigned long tx_dropped; /* no space available in linux */
83 unsigned long multicast; /* multicast packets received */
84 unsigned long collisions;
86 /* detailed rx_errors: */
87 unsigned long rx_length_errors;
88 unsigned long rx_over_errors; /* receiver ring buff overflow */
89 unsigned long rx_crc_errors; /* recved pkt with crc error */
90 unsigned long rx_frame_errors; /* recv'd frame alignment error */
91 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
92 unsigned long rx_missed_errors; /* receiver missed packet */
94 /* detailed tx_errors */
95 unsigned long tx_aborted_errors;
96 unsigned long tx_carrier_errors;
97 unsigned long tx_fifo_errors;
98 unsigned long tx_heartbeat_errors;
99 unsigned long tx_window_errors;
101 /* for cslip etc */
102 unsigned long rx_compressed;
103 unsigned long tx_compressed;
106 #ifdef CONFIG_NET_FASTROUTE
107 struct net_fastroute_stats
109 int hits;
110 int succeed;
111 int deferred;
112 int latency_reduction;
114 #endif
116 /* Media selection options. */
117 enum {
118 IF_PORT_UNKNOWN = 0,
119 IF_PORT_10BASE2,
120 IF_PORT_10BASET,
121 IF_PORT_AUI,
122 IF_PORT_100BASET,
123 IF_PORT_100BASETX,
124 IF_PORT_100BASEFX
127 #ifdef __KERNEL__
129 extern const char *if_port_text[];
131 #include <linux/skbuff.h>
133 struct neighbour;
134 struct neigh_parms;
135 struct sk_buff;
138 * We tag multicasts with these structures.
141 struct dev_mc_list
143 struct dev_mc_list *next;
144 __u8 dmi_addr[MAX_ADDR_LEN];
145 unsigned char dmi_addrlen;
146 int dmi_users;
147 int dmi_gusers;
150 struct hh_cache
152 struct hh_cache *hh_next; /* Next entry */
153 atomic_t hh_refcnt; /* number of users */
154 unsigned short hh_type; /* protocol identifier, f.e ETH_P_IP */
155 int (*hh_output)(struct sk_buff *skb);
156 rwlock_t hh_lock;
157 /* cached hardware header; allow for machine alignment needs. */
158 unsigned long hh_data[16/sizeof(unsigned long)];
163 * The DEVICE structure.
164 * Actually, this whole structure is a big mistake. It mixes I/O
165 * data with strictly "high-level" data, and it has to know about
166 * almost every data structure used in the INET module.
168 * FIXME: cleanup struct device such that network protocol info
169 * moves out.
172 struct device
176 * This is the first field of the "visible" part of this structure
177 * (i.e. as seen by users in the "Space.c" file). It is the name
178 * the interface.
180 char *name;
183 * I/O specific fields
184 * FIXME: Merge these and struct ifmap into one
186 unsigned long rmem_end; /* shmem "recv" end */
187 unsigned long rmem_start; /* shmem "recv" start */
188 unsigned long mem_end; /* shared mem end */
189 unsigned long mem_start; /* shared mem start */
190 unsigned long base_addr; /* device I/O address */
191 unsigned int irq; /* device IRQ number */
193 /* Low-level status flags. */
194 volatile unsigned char start; /* start an operation */
196 * These two are just single-bit flags, but due to atomicity
197 * reasons they have to be inside a "unsigned long". However,
198 * they should be inside the SAME unsigned long instead of
199 * this wasteful use of memory..
201 unsigned long interrupt; /* bitops.. */
202 unsigned long tbusy; /* transmitter busy */
204 struct device *next;
206 /* The device initialization function. Called only once. */
207 int (*init)(struct device *dev);
208 void (*destructor)(struct device *dev);
210 /* Interface index. Unique device identifier */
211 int ifindex;
212 int iflink;
215 * Some hardware also needs these fields, but they are not
216 * part of the usual set specified in Space.c.
219 unsigned char if_port; /* Selectable AUI, TP,..*/
220 unsigned char dma; /* DMA channel */
222 struct net_device_stats* (*get_stats)(struct device *dev);
223 struct iw_statistics* (*get_wireless_stats)(struct device *dev);
226 * This marks the end of the "visible" part of the structure. All
227 * fields hereafter are internal to the system, and may change at
228 * will (read: may be cleaned up at will).
231 /* These may be needed for future network-power-down code. */
232 unsigned long trans_start; /* Time (in jiffies) of last Tx */
233 unsigned long last_rx; /* Time of last Rx */
235 unsigned short flags; /* interface flags (a la BSD) */
236 unsigned short gflags;
237 unsigned mtu; /* interface MTU value */
238 unsigned short type; /* interface hardware type */
239 unsigned short hard_header_len; /* hardware hdr length */
240 void *priv; /* pointer to private data */
242 /* Interface address info. */
243 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
244 unsigned char pad; /* make dev_addr aligned to 8 bytes */
245 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address */
246 unsigned char addr_len; /* hardware address length */
248 struct dev_mc_list *mc_list; /* Multicast mac addresses */
249 int mc_count; /* Number of installed mcasts */
250 int promiscuity;
251 int allmulti;
253 /* For load balancing driver pair support */
255 unsigned long pkt_queue; /* Packets queued */
256 struct device *slave; /* Slave device */
258 /* Protocol specific pointers */
260 void *atalk_ptr; /* AppleTalk link */
261 void *ip_ptr; /* IPv4 specific data */
262 void *dn_ptr; /* DECnet specific data */
264 struct Qdisc *qdisc;
265 struct Qdisc *qdisc_sleeping;
266 struct Qdisc *qdisc_list;
267 unsigned long tx_queue_len; /* Max frames per queue allowed */
269 /* hard_start_xmit synchronizer */
270 spinlock_t xmit_lock;
272 /* Pointers to interface service routines. */
273 int (*open)(struct device *dev);
274 int (*stop)(struct device *dev);
275 int (*hard_start_xmit) (struct sk_buff *skb,
276 struct device *dev);
277 int (*hard_header) (struct sk_buff *skb,
278 struct device *dev,
279 unsigned short type,
280 void *daddr,
281 void *saddr,
282 unsigned len);
283 int (*rebuild_header)(struct sk_buff *skb);
284 #define HAVE_MULTICAST
285 void (*set_multicast_list)(struct device *dev);
286 #define HAVE_SET_MAC_ADDR
287 int (*set_mac_address)(struct device *dev,
288 void *addr);
289 #define HAVE_PRIVATE_IOCTL
290 int (*do_ioctl)(struct device *dev,
291 struct ifreq *ifr, int cmd);
292 #define HAVE_SET_CONFIG
293 int (*set_config)(struct device *dev,
294 struct ifmap *map);
295 #define HAVE_HEADER_CACHE
296 int (*hard_header_cache)(struct neighbour *neigh,
297 struct hh_cache *hh);
298 void (*header_cache_update)(struct hh_cache *hh,
299 struct device *dev,
300 unsigned char * haddr);
301 #define HAVE_CHANGE_MTU
302 int (*change_mtu)(struct device *dev, int new_mtu);
304 int (*hard_header_parse)(struct sk_buff *skb,
305 unsigned char *haddr);
306 int (*neigh_setup)(struct device *dev, struct neigh_parms *);
307 int (*accept_fastpath)(struct device *, struct dst_entry*);
309 #ifdef CONFIG_NET_FASTROUTE
310 /* Really, this semaphore may be necessary and for not fastroute code;
311 f.e. SMP??
313 int tx_semaphore;
314 #define NETDEV_FASTROUTE_HMASK 0xF
315 /* Semi-private data. Keep it at the end of device struct. */
316 struct dst_entry *fastpath[NETDEV_FASTROUTE_HMASK+1];
317 #endif
321 struct packet_type
323 unsigned short type; /* This is really htons(ether_type). */
324 struct device *dev; /* NULL is wildcarded here */
325 int (*func) (struct sk_buff *, struct device *,
326 struct packet_type *);
327 void *data; /* Private to the packet type */
328 struct packet_type *next;
332 #include <linux/interrupt.h>
333 #include <linux/notifier.h>
335 extern struct device loopback_dev; /* The loopback */
336 extern struct device *dev_base; /* All devices */
337 extern rwlock_t dev_base_lock; /* Device list lock */
338 extern struct packet_type *ptype_base[16]; /* Hashed types */
339 extern int netdev_dropping;
340 extern int net_cpu_congestion;
342 extern struct device *dev_getbyhwaddr(unsigned short type, char *hwaddr);
343 extern void dev_add_pack(struct packet_type *pt);
344 extern void dev_remove_pack(struct packet_type *pt);
345 extern struct device *dev_get(const char *name);
346 extern struct device *dev_alloc(const char *name, int *err);
347 extern int dev_alloc_name(struct device *dev, const char *name);
348 extern int dev_open(struct device *dev);
349 extern int dev_close(struct device *dev);
350 extern int dev_queue_xmit(struct sk_buff *skb);
351 extern void dev_loopback_xmit(struct sk_buff *skb);
352 extern int register_netdevice(struct device *dev);
353 extern int unregister_netdevice(struct device *dev);
354 extern int register_netdevice_notifier(struct notifier_block *nb);
355 extern int unregister_netdevice_notifier(struct notifier_block *nb);
356 extern int dev_new_index(void);
357 extern struct device *dev_get_by_index(int ifindex);
358 extern int dev_restart(struct device *dev);
360 typedef int gifconf_func_t(struct device * dev, char * bufptr, int len);
361 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
362 extern __inline__ int unregister_gifconf(unsigned int family)
364 return register_gifconf(family, 0);
367 #define HAVE_NETIF_RX 1
368 extern void netif_rx(struct sk_buff *skb);
369 extern void net_bh(void);
370 extern int dev_get_info(char *buffer, char **start, off_t offset, int length, int dummy);
371 extern int dev_ioctl(unsigned int cmd, void *);
372 extern int dev_change_flags(struct device *, unsigned);
373 extern void dev_queue_xmit_nit(struct sk_buff *skb, struct device *dev);
375 extern void dev_init(void);
377 extern int netdev_nit;
379 /* Locking protection for page faults during outputs to devices unloaded during the fault */
381 extern atomic_t dev_lockct;
384 * These two don't currently need to be atomic
385 * but they may do soon. Do it properly anyway.
388 extern __inline__ void dev_lock_list(void)
390 atomic_inc(&dev_lockct);
393 extern __inline__ void dev_unlock_list(void)
395 atomic_dec(&dev_lockct);
399 * This almost never occurs, isn't in performance critical paths
400 * and we can thus be relaxed about it.
402 * FIXME: What if this is being run as a real time process ??
403 * Linus: We need a way to force a yield here ?
405 * FIXME: Though dev_lockct is atomic varible, locking procedure
406 * is not atomic.
409 extern __inline__ void dev_lock_wait(void)
411 while (atomic_read(&dev_lockct)) {
412 current->policy |= SCHED_YIELD;
413 schedule();
417 extern __inline__ void dev_init_buffers(struct device *dev)
419 /* DO NOTHING */
422 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
424 extern void ether_setup(struct device *dev);
425 extern void fddi_setup(struct device *dev);
426 extern void tr_setup(struct device *dev);
427 extern void tr_freedev(struct device *dev);
428 extern int ether_config(struct device *dev, struct ifmap *map);
429 /* Support for loadable net-drivers */
430 extern int register_netdev(struct device *dev);
431 extern void unregister_netdev(struct device *dev);
432 extern int register_trdev(struct device *dev);
433 extern void unregister_trdev(struct device *dev);
434 /* Functions used for multicast support */
435 extern void dev_mc_upload(struct device *dev);
436 extern int dev_mc_delete(struct device *dev, void *addr, int alen, int all);
437 extern int dev_mc_add(struct device *dev, void *addr, int alen, int newonly);
438 extern void dev_mc_discard(struct device *dev);
439 extern void dev_set_promiscuity(struct device *dev, int inc);
440 extern void dev_set_allmulti(struct device *dev, int inc);
441 extern void netdev_state_change(struct device *dev);
442 /* Load a device via the kmod */
443 extern void dev_load(const char *name);
444 extern void dev_mcast_init(void);
445 extern int netdev_register_fc(struct device *dev, void (*stimul)(struct device *dev));
446 extern void netdev_unregister_fc(int bit);
447 extern int netdev_dropping;
448 extern int netdev_max_backlog;
449 extern atomic_t netdev_rx_dropped;
450 extern unsigned long netdev_fc_xoff;
451 #ifdef CONFIG_NET_FASTROUTE
452 extern int netdev_fastroute;
453 extern int netdev_fastroute_obstacles;
454 extern void dev_clear_fastroute(struct device *dev);
455 extern struct net_fastroute_stats dev_fastroute_stat;
456 #endif
459 #endif /* __KERNEL__ */
461 #endif /* _LINUX_DEV_H */