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MOXA linux-2.6.x / linux-2.6.9-uc0 from sdlinux-moxaart.tgz
[linux-2.6.9-moxart.git] / include / linux / netdevice.h
blob8325475d6ea06b1e701dc290e8070c879d948a4c
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@cesdis.gsfc.nasa.gov>
14 * Alan Cox, <Alan.Cox@linux.org>
15 * Bjorn Ekwall. <bj0rn@blox.se>
16 * Pekka Riikonen <priikone@poseidon.pspt.fi>
17 *
18 * This program is free software; you can redistribute it and/or
19 * modify it under the terms of the GNU General Public License
20 * as published by the Free Software Foundation; either version
21 * 2 of the License, or (at your option) any later version.
22 *
23 * Moved to /usr/include/linux for NET3
24 */
25 #ifndef _LINUX_NETDEVICE_H
26 #define _LINUX_NETDEVICE_H
27
28 #include <linux/if.h>
29 #include <linux/if_ether.h>
30 #include <linux/if_packet.h>
31
32 #ifdef __KERNEL__
33 #include <asm/atomic.h>
34 #include <asm/cache.h>
35 #include <asm/byteorder.h>
36
37 #include <linux/config.h>
38 #include <linux/device.h>
39 #include <linux/percpu.h>
40
41 struct divert_blk;
42 struct vlan_group;
43 struct ethtool_ops;
44
45 /* source back-compat hooks */
46 #define SET_ETHTOOL_OPS(netdev,ops) \
47 ( (netdev)->ethtool_ops = (ops) )
48
49 #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
50 functions are available. */
51 #define HAVE_FREE_NETDEV /* free_netdev() */
52 #define HAVE_NETDEV_PRIV /* netdev_priv() */
53
54 #define NET_XMIT_SUCCESS 0
55 #define NET_XMIT_DROP 1 /* skb dropped */
56 #define NET_XMIT_CN 2 /* congestion notification */
57 #define NET_XMIT_POLICED 3 /* skb is shot by police */
58 #define NET_XMIT_BYPASS 4 /* packet does not leave via dequeue;
59 (TC use only - dev_queue_xmit
60 returns this as NET_XMIT_SUCCESS) */
61
62 /* Backlog congestion levels */
63 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
64 #define NET_RX_DROP 1 /* packet dropped */
65 #define NET_RX_CN_LOW 2 /* storm alert, just in case */
66 #define NET_RX_CN_MOD 3 /* Storm on its way! */
67 #define NET_RX_CN_HIGH 4 /* The storm is here */
68 #define NET_RX_BAD 5 /* packet dropped due to kernel error */
69
70 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
71
72 #endif
73
74 #define MAX_ADDR_LEN 32 /* Largest hardware address length */
75
76 /* Driver transmit return codes */
77 #define NETDEV_TX_OK 0 /* driver took care of packet */
78 #define NETDEV_TX_BUSY 1 /* driver tx path was busy*/
79 #define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */
80
81 /*
82 * Compute the worst case header length according to the protocols
83 * used.
84 */
85
86 #if !defined(CONFIG_AX25) && !defined(CONFIG_AX25_MODULE) && !defined(CONFIG_TR)
87 #define LL_MAX_HEADER 32
88 #else
89 #if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
90 #define LL_MAX_HEADER 96
91 #else
92 #define LL_MAX_HEADER 48
93 #endif
94 #endif
95
96 #if !defined(CONFIG_NET_IPIP) && \
97 !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE)
98 #define MAX_HEADER LL_MAX_HEADER
99 #else
100 #define MAX_HEADER (LL_MAX_HEADER + 48)
101 #endif
102
103 /*
104 * Network device statistics. Akin to the 2.0 ether stats but
105 * with byte counters.
106 */
107
108 struct net_device_stats
109 {
110 unsigned long rx_packets; /* total packets received */
111 unsigned long tx_packets; /* total packets transmitted */
112 unsigned long rx_bytes; /* total bytes received */
113 unsigned long tx_bytes; /* total bytes transmitted */
114 unsigned long rx_errors; /* bad packets received */
115 unsigned long tx_errors; /* packet transmit problems */
116 unsigned long rx_dropped; /* no space in linux buffers */
117 unsigned long tx_dropped; /* no space available in linux */
118 unsigned long multicast; /* multicast packets received */
119 unsigned long collisions;
120
121 /* detailed rx_errors: */
122 unsigned long rx_length_errors;
123 unsigned long rx_over_errors; /* receiver ring buff overflow */
124 unsigned long rx_crc_errors; /* recved pkt with crc error */
125 unsigned long rx_frame_errors; /* recv'd frame alignment error */
126 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
127 unsigned long rx_missed_errors; /* receiver missed packet */
128
129 /* detailed tx_errors */
130 unsigned long tx_aborted_errors;
131 unsigned long tx_carrier_errors;
132 unsigned long tx_fifo_errors;
133 unsigned long tx_heartbeat_errors;
134 unsigned long tx_window_errors;
135
136 /* for cslip etc */
137 unsigned long rx_compressed;
138 unsigned long tx_compressed;
139 };
140
141
142 /* Media selection options. */
143 enum {
144 IF_PORT_UNKNOWN = 0,
145 IF_PORT_10BASE2,
146 IF_PORT_10BASET,
147 IF_PORT_AUI,
148 IF_PORT_100BASET,
149 IF_PORT_100BASETX,
150 IF_PORT_100BASEFX
151 };
152
153 #ifdef __KERNEL__
154
155 #include <linux/cache.h>
156 #include <linux/skbuff.h>
157
158 struct neighbour;
159 struct neigh_parms;
160 struct sk_buff;
161
162 struct netif_rx_stats
163 {
164 unsigned total;
165 unsigned dropped;
166 unsigned time_squeeze;
167 unsigned throttled;
168 unsigned fastroute_hit;
169 unsigned fastroute_success;
170 unsigned fastroute_defer;
171 unsigned fastroute_deferred_out;
172 unsigned fastroute_latency_reduction;
173 unsigned cpu_collision;
174 };
175
176 DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
177
178
179 /*
180 * We tag multicasts with these structures.
181 */
182
183 struct dev_mc_list
184 {
185 struct dev_mc_list *next;
186 __u8 dmi_addr[MAX_ADDR_LEN];
187 unsigned char dmi_addrlen;
188 int dmi_users;
189 int dmi_gusers;
190 };
191
192 struct hh_cache
193 {
194 struct hh_cache *hh_next; /* Next entry */
195 atomic_t hh_refcnt; /* number of users */
196 unsigned short hh_type; /* protocol identifier, f.e ETH_P_IP
197 * NOTE: For VLANs, this will be the
198 * encapuslated type. --BLG
199 */
200 int hh_len; /* length of header */
201 int (*hh_output)(struct sk_buff *skb);
202 rwlock_t hh_lock;
203
204 /* cached hardware header; allow for machine alignment needs. */
205 #define HH_DATA_MOD 16
206 #define HH_DATA_OFF(__len) \
207 (HH_DATA_MOD - ((__len) & (HH_DATA_MOD - 1)))
208 #define HH_DATA_ALIGN(__len) \
209 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
210 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
211 };
212
213 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
214 * Alternative is:
215 * dev->hard_header_len ? (dev->hard_header_len +
216 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
217 *
218 * We could use other alignment values, but we must maintain the
219 * relationship HH alignment <= LL alignment.
220 */
221 #define LL_RESERVED_SPACE(dev) \
222 (((dev)->hard_header_len&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
223 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
224 ((((dev)->hard_header_len+extra)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
225
226 /* These flag bits are private to the generic network queueing
227 * layer, they may not be explicitly referenced by any other
228 * code.
229 */
230
231 enum netdev_state_t
232 {
233 __LINK_STATE_XOFF=0,
234 __LINK_STATE_START,
235 __LINK_STATE_PRESENT,
236 __LINK_STATE_SCHED,
237 __LINK_STATE_NOCARRIER,
238 __LINK_STATE_RX_SCHED,
239 __LINK_STATE_LINKWATCH_PENDING
240 };
241
242
243 /*
244 * This structure holds at boot time configured netdevice settings. They
245 * are then used in the device probing.
246 */
247 struct netdev_boot_setup {
248 char name[IFNAMSIZ];
249 struct ifmap map;
250 };
251 #define NETDEV_BOOT_SETUP_MAX 8
252
253
254 /*
255 * The DEVICE structure.
256 * Actually, this whole structure is a big mistake. It mixes I/O
257 * data with strictly "high-level" data, and it has to know about
258 * almost every data structure used in the INET module.
259 *
260 * FIXME: cleanup struct net_device such that network protocol info
261 * moves out.
262 */
263
264 struct net_device
265 {
266
267 /*
268 * This is the first field of the "visible" part of this structure
269 * (i.e. as seen by users in the "Space.c" file). It is the name
270 * the interface.
271 */
272 char name[IFNAMSIZ];
273
274 /*
275 * I/O specific fields
276 * FIXME: Merge these and struct ifmap into one
277 */
278 unsigned long mem_end; /* shared mem end */
279 unsigned long mem_start; /* shared mem start */
280 unsigned long base_addr; /* device I/O address */
281 unsigned int irq; /* device IRQ number */
282
283 /*
284 * Some hardware also needs these fields, but they are not
285 * part of the usual set specified in Space.c.
286 */
287
288 unsigned char if_port; /* Selectable AUI, TP,..*/
289 unsigned char dma; /* DMA channel */
290
291 unsigned long state;
292
293 struct net_device *next;
294
295 /* The device initialization function. Called only once. */
296 int (*init)(struct net_device *dev);
297
298 /* ------- Fields preinitialized in Space.c finish here ------- */
299
300 struct net_device *next_sched;
301
302 /* Interface index. Unique device identifier */
303 int ifindex;
304 int iflink;
305
306
307 struct net_device_stats* (*get_stats)(struct net_device *dev);
308 struct iw_statistics* (*get_wireless_stats)(struct net_device *dev);
309
310 /* List of functions to handle Wireless Extensions (instead of ioctl).
311 * See <net/iw_handler.h> for details. Jean II */
312 struct iw_handler_def * wireless_handlers;
313
314 struct ethtool_ops *ethtool_ops;
315
316 /*
317 * This marks the end of the "visible" part of the structure. All
318 * fields hereafter are internal to the system, and may change at
319 * will (read: may be cleaned up at will).
320 */
321
322 /* These may be needed for future network-power-down code. */
323 unsigned long trans_start; /* Time (in jiffies) of last Tx */
324 unsigned long last_rx; /* Time of last Rx */
325
326 unsigned short flags; /* interface flags (a la BSD) */
327 unsigned short gflags;
328 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
329 unsigned short unused_alignment_fixer; /* Because we need priv_flags,
330 * and we want to be 32-bit aligned.
331 */
332
333 unsigned mtu; /* interface MTU value */
334 unsigned short type; /* interface hardware type */
335 unsigned short hard_header_len; /* hardware hdr length */
336 void *priv; /* pointer to private data */
337
338 struct net_device *master; /* Pointer to master device of a group,
339 * which this device is member of.
340 */
341
342 /* Interface address info. */
343 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
344 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address */
345 unsigned char addr_len; /* hardware address length */
346
347 struct dev_mc_list *mc_list; /* Multicast mac addresses */
348 int mc_count; /* Number of installed mcasts */
349 int promiscuity;
350 int allmulti;
351
352 int watchdog_timeo;
353 struct timer_list watchdog_timer;
354
355 /* Protocol specific pointers */
356
357 void *atalk_ptr; /* AppleTalk link */
358 void *ip_ptr; /* IPv4 specific data */
359 void *dn_ptr; /* DECnet specific data */
360 void *ip6_ptr; /* IPv6 specific data */
361 void *ec_ptr; /* Econet specific data */
362 void *ax25_ptr; /* AX.25 specific data */
363
364 struct list_head poll_list; /* Link to poll list */
365 int quota;
366 int weight;
367
368 struct Qdisc *qdisc;
369 struct Qdisc *qdisc_sleeping;
370 struct Qdisc *qdisc_ingress;
371 struct list_head qdisc_list;
372 unsigned long tx_queue_len; /* Max frames per queue allowed */
373
374 /* ingress path synchronizer */
375 spinlock_t ingress_lock;
376 /* hard_start_xmit synchronizer */
377 spinlock_t xmit_lock;
378 /* cpu id of processor entered to hard_start_xmit or -1,
379 if nobody entered there.
380 */
381 int xmit_lock_owner;
382 /* device queue lock */
383 spinlock_t queue_lock;
384 /* Number of references to this device */
385 atomic_t refcnt;
386 /* delayed register/unregister */
387 struct list_head todo_list;
388 /* device name hash chain */
389 struct hlist_node name_hlist;
390 /* device index hash chain */
391 struct hlist_node index_hlist;
392
393 /* register/unregister state machine */
394 enum { NETREG_UNINITIALIZED=0,
395 NETREG_REGISTERING, /* called register_netdevice */
396 NETREG_REGISTERED, /* completed register todo */
397 NETREG_UNREGISTERING, /* called unregister_netdevice */
398 NETREG_UNREGISTERED, /* completed unregister todo */
399 NETREG_RELEASED, /* called free_netdev */
400 } reg_state;
401
402 /* Net device features */
403 int features;
404 #define NETIF_F_SG 1 /* Scatter/gather IO. */
405 #define NETIF_F_IP_CSUM 2 /* Can checksum only TCP/UDP over IPv4. */
406 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
407 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
408 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
409 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
410 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
411 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
412 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
413 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
414 #define NETIF_F_TSO 2048 /* Can offload TCP/IP segmentation */
415 #define NETIF_F_LLTX 4096 /* LockLess TX */
416
417 /* Called after device is detached from network. */
418 void (*uninit)(struct net_device *dev);
419 /* Called after last user reference disappears. */
420 void (*destructor)(struct net_device *dev);
421
422 /* Pointers to interface service routines. */
423 int (*open)(struct net_device *dev);
424 int (*stop)(struct net_device *dev);
425 int (*hard_start_xmit) (struct sk_buff *skb,
426 struct net_device *dev);
427 #define HAVE_NETDEV_POLL
428 int (*poll) (struct net_device *dev, int *quota);
429 int (*hard_header) (struct sk_buff *skb,
430 struct net_device *dev,
431 unsigned short type,
432 void *daddr,
433 void *saddr,
434 unsigned len);
435 int (*rebuild_header)(struct sk_buff *skb);
436 #define HAVE_MULTICAST
437 void (*set_multicast_list)(struct net_device *dev);
438 #define HAVE_SET_MAC_ADDR
439 int (*set_mac_address)(struct net_device *dev,
440 void *addr);
441 #define HAVE_PRIVATE_IOCTL
442 int (*do_ioctl)(struct net_device *dev,
443 struct ifreq *ifr, int cmd);
444 #define HAVE_SET_CONFIG
445 int (*set_config)(struct net_device *dev,
446 struct ifmap *map);
447 #define HAVE_HEADER_CACHE
448 int (*hard_header_cache)(struct neighbour *neigh,
449 struct hh_cache *hh);
450 void (*header_cache_update)(struct hh_cache *hh,
451 struct net_device *dev,
452 unsigned char * haddr);
453 #define HAVE_CHANGE_MTU
454 int (*change_mtu)(struct net_device *dev, int new_mtu);
455
456 #define HAVE_TX_TIMEOUT
457 void (*tx_timeout) (struct net_device *dev);
458
459 void (*vlan_rx_register)(struct net_device *dev,
460 struct vlan_group *grp);
461 void (*vlan_rx_add_vid)(struct net_device *dev,
462 unsigned short vid);
463 void (*vlan_rx_kill_vid)(struct net_device *dev,
464 unsigned short vid);
465
466 int (*hard_header_parse)(struct sk_buff *skb,
467 unsigned char *haddr);
468 int (*neigh_setup)(struct net_device *dev, struct neigh_parms *);
469 int (*accept_fastpath)(struct net_device *, struct dst_entry*);
470 #ifdef CONFIG_NETPOLL
471 int netpoll_rx;
472 #endif
473 #ifdef CONFIG_NET_POLL_CONTROLLER
474 void (*poll_controller)(struct net_device *dev);
475 #endif
476
477 /* bridge stuff */
478 struct net_bridge_port *br_port;
479
480 #ifdef CONFIG_NET_DIVERT
481 /* this will get initialized at each interface type init routine */
482 struct divert_blk *divert;
483 #endif /* CONFIG_NET_DIVERT */
484
485 /* class/net/name entry */
486 struct class_device class_dev;
487 /* how much padding had been added by alloc_netdev() */
488 int padded;
489 };
490
491 #define NETDEV_ALIGN 32
492 #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
493
494 static inline void *netdev_priv(struct net_device *dev)
495 {
496 return (char *)dev + ((sizeof(struct net_device)
497 + NETDEV_ALIGN_CONST)
498 & ~NETDEV_ALIGN_CONST);
499 }
500
501 #define SET_MODULE_OWNER(dev) do { } while (0)
502 /* Set the sysfs physical device reference for the network logical device
503 * if set prior to registration will cause a symlink during initialization.
504 */
505 #define SET_NETDEV_DEV(net, pdev) ((net)->class_dev.dev = (pdev))
506
507 struct packet_type {
508 unsigned short type; /* This is really htons(ether_type). */
509 struct net_device *dev; /* NULL is wildcarded here */
510 int (*func) (struct sk_buff *, struct net_device *,
511 struct packet_type *);
512 void *af_packet_priv;
513 struct list_head list;
514 };
515
516 #include <linux/interrupt.h>
517 #include <linux/notifier.h>
518
519 extern struct net_device loopback_dev; /* The loopback */
520 extern struct net_device *dev_base; /* All devices */
521 extern rwlock_t dev_base_lock; /* Device list lock */
522
523 extern int netdev_boot_setup_add(char *name, struct ifmap *map);
524 extern int netdev_boot_setup_check(struct net_device *dev);
525 extern unsigned long netdev_boot_base(const char *prefix, int unit);
526 extern struct net_device *dev_getbyhwaddr(unsigned short type, char *hwaddr);
527 extern struct net_device *__dev_getfirstbyhwtype(unsigned short type);
528 extern struct net_device *dev_getfirstbyhwtype(unsigned short type);
529 extern void dev_add_pack(struct packet_type *pt);
530 extern void dev_remove_pack(struct packet_type *pt);
531 extern void __dev_remove_pack(struct packet_type *pt);
532 extern int __dev_get(const char *name);
533 static inline int __deprecated dev_get(const char *name)
534 {
535 return __dev_get(name);
536 }
537 extern struct net_device *dev_get_by_flags(unsigned short flags,
538 unsigned short mask);
539 extern struct net_device *__dev_get_by_flags(unsigned short flags,
540 unsigned short mask);
541 extern struct net_device *dev_get_by_name(const char *name);
542 extern struct net_device *__dev_get_by_name(const char *name);
543 extern int dev_alloc_name(struct net_device *dev, const char *name);
544 extern int dev_open(struct net_device *dev);
545 extern int dev_close(struct net_device *dev);
546 extern int dev_queue_xmit(struct sk_buff *skb);
547 extern int register_netdevice(struct net_device *dev);
548 extern int unregister_netdevice(struct net_device *dev);
549 extern void free_netdev(struct net_device *dev);
550 extern void synchronize_net(void);
551 extern int register_netdevice_notifier(struct notifier_block *nb);
552 extern int unregister_netdevice_notifier(struct notifier_block *nb);
553 extern int call_netdevice_notifiers(unsigned long val, void *v);
554 extern int dev_new_index(void);
555 extern struct net_device *dev_get_by_index(int ifindex);
556 extern struct net_device *__dev_get_by_index(int ifindex);
557 extern int dev_restart(struct net_device *dev);
558 #ifdef CONFIG_NETPOLL_TRAP
559 extern int netpoll_trap(void);
560 #endif
561
562 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
563 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
564 static inline int unregister_gifconf(unsigned int family)
565 {
566 return register_gifconf(family, NULL);
567 }
568
569 /*
570 * Incoming packets are placed on per-cpu queues so that
571 * no locking is needed.
572 */
573
574 struct softnet_data
575 {
576 int throttle;
577 int cng_level;
578 int avg_blog;
579 struct sk_buff_head input_pkt_queue;
580 struct list_head poll_list;
581 struct net_device *output_queue;
582 struct sk_buff *completion_queue;
583
584 struct net_device backlog_dev; /* Sorry. 8) */
585 };
586
587 DECLARE_PER_CPU(struct softnet_data,softnet_data);
588
589 #define HAVE_NETIF_QUEUE
590
591 static inline void __netif_schedule(struct net_device *dev)
592 {
593 if (!test_and_set_bit(__LINK_STATE_SCHED, &dev->state)) {
594 unsigned long flags;
595 struct softnet_data *sd;
596
597 local_irq_save(flags);
598 sd = &__get_cpu_var(softnet_data);
599 dev->next_sched = sd->output_queue;
600 sd->output_queue = dev;
601 raise_softirq_irqoff(NET_TX_SOFTIRQ);
602 local_irq_restore(flags);
603 }
604 }
605
606 static inline void netif_schedule(struct net_device *dev)
607 {
608 if (!test_bit(__LINK_STATE_XOFF, &dev->state))
609 __netif_schedule(dev);
610 }
611
612 static inline void netif_start_queue(struct net_device *dev)
613 {
614 clear_bit(__LINK_STATE_XOFF, &dev->state);
615 }
616
617 static inline void netif_wake_queue(struct net_device *dev)
618 {
619 #ifdef CONFIG_NETPOLL_TRAP
620 if (netpoll_trap())
621 return;
622 #endif
623 if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state))
624 __netif_schedule(dev);
625 }
626
627 static inline void netif_stop_queue(struct net_device *dev)
628 {
629 #ifdef CONFIG_NETPOLL_TRAP
630 if (netpoll_trap())
631 return;
632 #endif
633 set_bit(__LINK_STATE_XOFF, &dev->state);
634 }
635
636 static inline int netif_queue_stopped(const struct net_device *dev)
637 {
638 return test_bit(__LINK_STATE_XOFF, &dev->state);
639 }
640
641 static inline int netif_running(const struct net_device *dev)
642 {
643 return test_bit(__LINK_STATE_START, &dev->state);
644 }
645
646
647 /* Use this variant when it is known for sure that it
648 * is executing from interrupt context.
649 */
650 static inline void dev_kfree_skb_irq(struct sk_buff *skb)
651 {
652 if (atomic_dec_and_test(&skb->users)) {
653 struct softnet_data *sd;
654 unsigned long flags;
655
656 local_irq_save(flags);
657 sd = &__get_cpu_var(softnet_data);
658 skb->next = sd->completion_queue;
659 sd->completion_queue = skb;
660 raise_softirq_irqoff(NET_TX_SOFTIRQ);
661 local_irq_restore(flags);
662 }
663 }
664
665 /* Use this variant in places where it could be invoked
666 * either from interrupt or non-interrupt context.
667 */
668 static inline void dev_kfree_skb_any(struct sk_buff *skb)
669 {
670 if (in_irq() || irqs_disabled())
671 dev_kfree_skb_irq(skb);
672 else
673 dev_kfree_skb(skb);
674 }
675
676 #define HAVE_NETIF_RX 1
677 extern int netif_rx(struct sk_buff *skb);
678 #define HAVE_NETIF_RECEIVE_SKB 1
679 extern int netif_receive_skb(struct sk_buff *skb);
680 extern int dev_ioctl(unsigned int cmd, void __user *);
681 extern int dev_ethtool(struct ifreq *);
682 extern unsigned dev_get_flags(const struct net_device *);
683 extern int dev_change_flags(struct net_device *, unsigned);
684 extern int dev_change_name(struct net_device *, char *);
685 extern int dev_set_mtu(struct net_device *, int);
686 extern void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev);
687
688 extern void dev_init(void);
689
690 extern int netdev_nit;
691
692 /* Post buffer to the network code from _non interrupt_ context.
693 * see net/core/dev.c for netif_rx description.
694 */
695 static inline int netif_rx_ni(struct sk_buff *skb)
696 {
697 int err = netif_rx(skb);
698 if (softirq_pending(smp_processor_id()))
699 do_softirq();
700 return err;
701 }
702
703 /* Called by rtnetlink.c:rtnl_unlock() */
704 extern void netdev_run_todo(void);
705
706 static inline void dev_put(struct net_device *dev)
707 {
708 atomic_dec(&dev->refcnt);
709 }
710
711 #define __dev_put(dev) atomic_dec(&(dev)->refcnt)
712 #define dev_hold(dev) atomic_inc(&(dev)->refcnt)
713
714 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
715 * and _off may be called from IRQ context, but it is caller
716 * who is responsible for serialization of these calls.
717 */
718
719 extern void linkwatch_fire_event(struct net_device *dev);
720
721 static inline int netif_carrier_ok(const struct net_device *dev)
722 {
723 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
724 }
725
726 extern void __netdev_watchdog_up(struct net_device *dev);
727
728 static inline void netif_carrier_on(struct net_device *dev)
729 {
730 if (test_and_clear_bit(__LINK_STATE_NOCARRIER, &dev->state))
731 linkwatch_fire_event(dev);
732 if (netif_running(dev))
733 __netdev_watchdog_up(dev);
734 }
735
736 static inline void netif_carrier_off(struct net_device *dev)
737 {
738 if (!test_and_set_bit(__LINK_STATE_NOCARRIER, &dev->state))
739 linkwatch_fire_event(dev);
740 }
741
742 /* Hot-plugging. */
743 static inline int netif_device_present(struct net_device *dev)
744 {
745 return test_bit(__LINK_STATE_PRESENT, &dev->state);
746 }
747
748 static inline void netif_device_detach(struct net_device *dev)
749 {
750 if (test_and_clear_bit(__LINK_STATE_PRESENT, &dev->state) &&
751 netif_running(dev)) {
752 netif_stop_queue(dev);
753 }
754 }
755
756 static inline void netif_device_attach(struct net_device *dev)
757 {
758 if (!test_and_set_bit(__LINK_STATE_PRESENT, &dev->state) &&
759 netif_running(dev)) {
760 netif_wake_queue(dev);
761 __netdev_watchdog_up(dev);
762 }
763 }
764
765 /*
766 * Network interface message level settings
767 */
768 #define HAVE_NETIF_MSG 1
769
770 enum {
771 NETIF_MSG_DRV = 0x0001,
772 NETIF_MSG_PROBE = 0x0002,
773 NETIF_MSG_LINK = 0x0004,
774 NETIF_MSG_TIMER = 0x0008,
775 NETIF_MSG_IFDOWN = 0x0010,
776 NETIF_MSG_IFUP = 0x0020,
777 NETIF_MSG_RX_ERR = 0x0040,
778 NETIF_MSG_TX_ERR = 0x0080,
779 NETIF_MSG_TX_QUEUED = 0x0100,
780 NETIF_MSG_INTR = 0x0200,
781 NETIF_MSG_TX_DONE = 0x0400,
782 NETIF_MSG_RX_STATUS = 0x0800,
783 NETIF_MSG_PKTDATA = 0x1000,
784 NETIF_MSG_HW = 0x2000,
785 NETIF_MSG_WOL = 0x4000,
786 };
787
788 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
789 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
790 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
791 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
792 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
793 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
794 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
795 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
796 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
797 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
798 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
799 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
800 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
801 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
802 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
803
804 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
805 {
806 /* use default */
807 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
808 return default_msg_enable_bits;
809 if (debug_value == 0) /* no output */
810 return 0;
811 /* set low N bits */
812 return (1 << debug_value) - 1;
813 }
814
815 /* Schedule rx intr now? */
816
817 static inline int netif_rx_schedule_prep(struct net_device *dev)
818 {
819 return netif_running(dev) &&
820 !test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state);
821 }
822
823 /* Add interface to tail of rx poll list. This assumes that _prep has
824 * already been called and returned 1.
825 */
826
827 static inline void __netif_rx_schedule(struct net_device *dev)
828 {
829 unsigned long flags;
830
831 local_irq_save(flags);
832 dev_hold(dev);
833 list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
834 if (dev->quota < 0)
835 dev->quota += dev->weight;
836 else
837 dev->quota = dev->weight;
838 __raise_softirq_irqoff(NET_RX_SOFTIRQ);
839 local_irq_restore(flags);
840 }
841
842 /* Try to reschedule poll. Called by irq handler. */
843
844 static inline void netif_rx_schedule(struct net_device *dev)
845 {
846 if (netif_rx_schedule_prep(dev))
847 __netif_rx_schedule(dev);
848 }
849
850 /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete().
851 * Do not inline this?
852 */
853 static inline int netif_rx_reschedule(struct net_device *dev, int undo)
854 {
855 if (netif_rx_schedule_prep(dev)) {
856 unsigned long flags;
857
858 dev->quota += undo;
859
860 local_irq_save(flags);
861 list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
862 __raise_softirq_irqoff(NET_RX_SOFTIRQ);
863 local_irq_restore(flags);
864 return 1;
865 }
866 return 0;
867 }
868
869 /* Remove interface from poll list: it must be in the poll list
870 * on current cpu. This primitive is called by dev->poll(), when
871 * it completes the work. The device cannot be out of poll list at this
872 * moment, it is BUG().
873 */
874 static inline void netif_rx_complete(struct net_device *dev)
875 {
876 unsigned long flags;
877
878 local_irq_save(flags);
879 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
880 list_del(&dev->poll_list);
881 smp_mb__before_clear_bit();
882 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
883 local_irq_restore(flags);
884 }
885
886 static inline void netif_poll_disable(struct net_device *dev)
887 {
888 while (test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state)) {
889 /* No hurry. */
890 current->state = TASK_INTERRUPTIBLE;
891 schedule_timeout(1);
892 }
893 }
894
895 static inline void netif_poll_enable(struct net_device *dev)
896 {
897 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
898 }
899
900 /* same as netif_rx_complete, except that local_irq_save(flags)
901 * has already been issued
902 */
903 static inline void __netif_rx_complete(struct net_device *dev)
904 {
905 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
906 list_del(&dev->poll_list);
907 smp_mb__before_clear_bit();
908 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
909 }
910
911 static inline void netif_tx_disable(struct net_device *dev)
912 {
913 spin_lock_bh(&dev->xmit_lock);
914 netif_stop_queue(dev);
915 spin_unlock_bh(&dev->xmit_lock);
916 }
917
918 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
919
920 extern void ether_setup(struct net_device *dev);
921 extern void fddi_setup(struct net_device *dev);
922 extern void tr_setup(struct net_device *dev);
923 extern void fc_setup(struct net_device *dev);
924 extern void fc_freedev(struct net_device *dev);
925 /* Support for loadable net-drivers */
926 extern struct net_device *alloc_netdev(int sizeof_priv, const char *name,
927 void (*setup)(struct net_device *));
928 extern int register_netdev(struct net_device *dev);
929 extern void unregister_netdev(struct net_device *dev);
930 /* Functions used for multicast support */
931 extern void dev_mc_upload(struct net_device *dev);
932 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
933 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
934 extern void dev_mc_discard(struct net_device *dev);
935 extern void dev_set_promiscuity(struct net_device *dev, int inc);
936 extern void dev_set_allmulti(struct net_device *dev, int inc);
937 extern void netdev_state_change(struct net_device *dev);
938 /* Load a device via the kmod */
939 extern void dev_load(const char *name);
940 extern void dev_mcast_init(void);
941 extern int netdev_register_fc(struct net_device *dev, void (*stimul)(struct net_device *dev));
942 extern void netdev_unregister_fc(int bit);
943 extern int netdev_max_backlog;
944 extern int weight_p;
945 extern unsigned long netdev_fc_xoff;
946 extern atomic_t netdev_dropping;
947 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
948 extern int skb_checksum_help(struct sk_buff **pskb, int inward);
949
950 #ifdef CONFIG_SYSCTL
951 extern char *net_sysctl_strdup(const char *s);
952 #endif
953
954 #endif /* __KERNEL__ */
955
956 #endif /* _LINUX_DEV_H */
MOXA 2.6.9 from sdlinux-moxaart.tgz