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[NET]: fix PROC_FS=n compile
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / linux / netdevice.h
CommitLineData
1da177e4
LT		 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 *
02c30a84 10 * Authors: Ross Biro
1da177e4
LT		 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
41struct divert_blk;
42struct vlan_group;
43struct ethtool_ops;
115c1d6e 44struct netpoll_info;
1da177e4
LT		 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
108struct 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. */
143enum {
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
158struct neighbour;
159struct neigh_parms;
160struct sk_buff;
161
162struct netif_rx_stats
163{
164 unsigned total;
165 unsigned dropped;
166 unsigned time_squeeze;
1da177e4
LT		 167 unsigned cpu_collision;
168};
169
170DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
171
172
173/*
174 * We tag multicasts with these structures.
175 */
176
177struct dev_mc_list
178{
179 struct dev_mc_list *next;
180 __u8 dmi_addr[MAX_ADDR_LEN];
181 unsigned char dmi_addrlen;
182 int dmi_users;
183 int dmi_gusers;
184};
185
186struct hh_cache
187{
188 struct hh_cache *hh_next; /* Next entry */
189 atomic_t hh_refcnt; /* number of users */
190 unsigned short hh_type; /* protocol identifier, f.e ETH_P_IP
191 * NOTE: For VLANs, this will be the
192 * encapuslated type. --BLG
193 */
194 int hh_len; /* length of header */
195 int (*hh_output)(struct sk_buff *skb);
196 rwlock_t hh_lock;
197
198 /* cached hardware header; allow for machine alignment needs. */
199#define HH_DATA_MOD 16
200#define HH_DATA_OFF(__len) \
5ba0eac6 201 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
1da177e4
LT		 202#define HH_DATA_ALIGN(__len) \
203 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
204 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
205};
206
207/* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
208 * Alternative is:
209 * dev->hard_header_len ? (dev->hard_header_len +
210 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
211 *
212 * We could use other alignment values, but we must maintain the
213 * relationship HH alignment <= LL alignment.
214 */
215#define LL_RESERVED_SPACE(dev) \
216 (((dev)->hard_header_len&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
217#define LL_RESERVED_SPACE_EXTRA(dev,extra) \
218 ((((dev)->hard_header_len+extra)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
219
220/* These flag bits are private to the generic network queueing
221 * layer, they may not be explicitly referenced by any other
222 * code.
223 */
224
225enum netdev_state_t
226{
227 __LINK_STATE_XOFF=0,
228 __LINK_STATE_START,
229 __LINK_STATE_PRESENT,
230 __LINK_STATE_SCHED,
231 __LINK_STATE_NOCARRIER,
232 __LINK_STATE_RX_SCHED,
233 __LINK_STATE_LINKWATCH_PENDING
234};
235
236
237/*
238 * This structure holds at boot time configured netdevice settings. They
239 * are then used in the device probing.
240 */
241struct netdev_boot_setup {
242 char name[IFNAMSIZ];
243 struct ifmap map;
244};
245#define NETDEV_BOOT_SETUP_MAX 8
246
20380731 247extern int __init netdev_boot_setup(char *str);
1da177e4
LT		 248
249/*
250 * The DEVICE structure.
251 * Actually, this whole structure is a big mistake. It mixes I/O
252 * data with strictly "high-level" data, and it has to know about
253 * almost every data structure used in the INET module.
254 *
255 * FIXME: cleanup struct net_device such that network protocol info
256 * moves out.
257 */
258
259struct net_device
260{
261
262 /*
263 * This is the first field of the "visible" part of this structure
264 * (i.e. as seen by users in the "Space.c" file). It is the name
265 * the interface.
266 */
267 char name[IFNAMSIZ];
268
269 /*
270 * I/O specific fields
271 * FIXME: Merge these and struct ifmap into one
272 */
273 unsigned long mem_end; /* shared mem end */
274 unsigned long mem_start; /* shared mem start */
275 unsigned long base_addr; /* device I/O address */
276 unsigned int irq; /* device IRQ number */
277
278 /*
279 * Some hardware also needs these fields, but they are not
280 * part of the usual set specified in Space.c.
281 */
282
283 unsigned char if_port; /* Selectable AUI, TP,..*/
284 unsigned char dma; /* DMA channel */
285
286 unsigned long state;
287
288 struct net_device *next;
289
290 /* The device initialization function. Called only once. */
291 int (*init)(struct net_device *dev);
292
293 /* ------- Fields preinitialized in Space.c finish here ------- */
294
295 struct net_device *next_sched;
296
297 /* Interface index. Unique device identifier */
298 int ifindex;
299 int iflink;
300
301
302 struct net_device_stats* (*get_stats)(struct net_device *dev);
303 struct iw_statistics* (*get_wireless_stats)(struct net_device *dev);
304
305 /* List of functions to handle Wireless Extensions (instead of ioctl).
306 * See <net/iw_handler.h> for details. Jean II */
307 const struct iw_handler_def * wireless_handlers;
308 /* Instance data managed by the core of Wireless Extensions. */
309 struct iw_public_data * wireless_data;
310
311 struct ethtool_ops *ethtool_ops;
312
313 /*
314 * This marks the end of the "visible" part of the structure. All
315 * fields hereafter are internal to the system, and may change at
316 * will (read: may be cleaned up at will).
317 */
318
319 /* These may be needed for future network-power-down code. */
320 unsigned long trans_start; /* Time (in jiffies) of last Tx */
321 unsigned long last_rx; /* Time of last Rx */
322
323 unsigned short flags; /* interface flags (a la BSD) */
324 unsigned short gflags;
325 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
326 unsigned short padded; /* How much padding added by alloc_netdev() */
327
328 unsigned mtu; /* interface MTU value */
329 unsigned short type; /* interface hardware type */
330 unsigned short hard_header_len; /* hardware hdr length */
331 void *priv; /* pointer to private data */
332
333 struct net_device *master; /* Pointer to master device of a group,
334 * which this device is member of.
335 */
336
337 /* Interface address info. */
338 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
339 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address */
340 unsigned char addr_len; /* hardware address length */
341 unsigned short dev_id; /* for shared network cards */
342
343 struct dev_mc_list *mc_list; /* Multicast mac addresses */
344 int mc_count; /* Number of installed mcasts */
345 int promiscuity;
346 int allmulti;
347
348 int watchdog_timeo;
349 struct timer_list watchdog_timer;
350
351 /* Protocol specific pointers */
352
353 void *atalk_ptr; /* AppleTalk link */
354 void *ip_ptr; /* IPv4 specific data */
355 void *dn_ptr; /* DECnet specific data */
356 void *ip6_ptr; /* IPv6 specific data */
357 void *ec_ptr; /* Econet specific data */
358 void *ax25_ptr; /* AX.25 specific data */
359
360 struct list_head poll_list; /* Link to poll list */
361 int quota;
362 int weight;
363
364 struct Qdisc *qdisc;
365 struct Qdisc *qdisc_sleeping;
366 struct Qdisc *qdisc_ingress;
367 struct list_head qdisc_list;
368 unsigned long tx_queue_len; /* Max frames per queue allowed */
369
370 /* ingress path synchronizer */
371 spinlock_t ingress_lock;
372 /* hard_start_xmit synchronizer */
373 spinlock_t xmit_lock;
374 /* cpu id of processor entered to hard_start_xmit or -1,
375 if nobody entered there.
376 */
377 int xmit_lock_owner;
378 /* device queue lock */
379 spinlock_t queue_lock;
380 /* Number of references to this device */
381 atomic_t refcnt;
382 /* delayed register/unregister */
383 struct list_head todo_list;
384 /* device name hash chain */
385 struct hlist_node name_hlist;
386 /* device index hash chain */
387 struct hlist_node index_hlist;
388
389 /* register/unregister state machine */
390 enum { NETREG_UNINITIALIZED=0,
391 NETREG_REGISTERING, /* called register_netdevice */
392 NETREG_REGISTERED, /* completed register todo */
393 NETREG_UNREGISTERING, /* called unregister_netdevice */
394 NETREG_UNREGISTERED, /* completed unregister todo */
395 NETREG_RELEASED, /* called free_netdev */
396 } reg_state;
397
398 /* Net device features */
81e81575 399 unsigned long features;
1da177e4
LT		 400#define NETIF_F_SG 1 /* Scatter/gather IO. */
401#define NETIF_F_IP_CSUM 2 /* Can checksum only TCP/UDP over IPv4. */
402#define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
403#define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
404#define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
405#define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
406#define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
407#define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
408#define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
409#define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
410#define NETIF_F_TSO 2048 /* Can offload TCP/IP segmentation */
411#define NETIF_F_LLTX 4096 /* LockLess TX */
412
413 /* Called after device is detached from network. */
414 void (*uninit)(struct net_device *dev);
415 /* Called after last user reference disappears. */
416 void (*destructor)(struct net_device *dev);
417
418 /* Pointers to interface service routines. */
419 int (*open)(struct net_device *dev);
420 int (*stop)(struct net_device *dev);
421 int (*hard_start_xmit) (struct sk_buff *skb,
422 struct net_device *dev);
423#define HAVE_NETDEV_POLL
424 int (*poll) (struct net_device *dev, int *quota);
425 int (*hard_header) (struct sk_buff *skb,
426 struct net_device *dev,
427 unsigned short type,
428 void *daddr,
429 void *saddr,
430 unsigned len);
431 int (*rebuild_header)(struct sk_buff *skb);
432#define HAVE_MULTICAST
433 void (*set_multicast_list)(struct net_device *dev);
434#define HAVE_SET_MAC_ADDR
435 int (*set_mac_address)(struct net_device *dev,
436 void *addr);
437#define HAVE_PRIVATE_IOCTL
438 int (*do_ioctl)(struct net_device *dev,
439 struct ifreq *ifr, int cmd);
440#define HAVE_SET_CONFIG
441 int (*set_config)(struct net_device *dev,
442 struct ifmap *map);
443#define HAVE_HEADER_CACHE
444 int (*hard_header_cache)(struct neighbour *neigh,
445 struct hh_cache *hh);
446 void (*header_cache_update)(struct hh_cache *hh,
447 struct net_device *dev,
448 unsigned char * haddr);
449#define HAVE_CHANGE_MTU
450 int (*change_mtu)(struct net_device *dev, int new_mtu);
451
452#define HAVE_TX_TIMEOUT
453 void (*tx_timeout) (struct net_device *dev);
454
455 void (*vlan_rx_register)(struct net_device *dev,
456 struct vlan_group *grp);
457 void (*vlan_rx_add_vid)(struct net_device *dev,
458 unsigned short vid);
459 void (*vlan_rx_kill_vid)(struct net_device *dev,
460 unsigned short vid);
461
462 int (*hard_header_parse)(struct sk_buff *skb,
463 unsigned char *haddr);
464 int (*neigh_setup)(struct net_device *dev, struct neigh_parms *);
465#ifdef CONFIG_NETPOLL
115c1d6e 466 struct netpoll_info *npinfo;
1da177e4
LT		 467#endif
468#ifdef CONFIG_NET_POLL_CONTROLLER
469 void (*poll_controller)(struct net_device *dev);
470#endif
471
472 /* bridge stuff */
473 struct net_bridge_port *br_port;
474
475#ifdef CONFIG_NET_DIVERT
476 /* this will get initialized at each interface type init routine */
477 struct divert_blk *divert;
478#endif /* CONFIG_NET_DIVERT */
479
480 /* class/net/name entry */
481 struct class_device class_dev;
482};
483
484#define NETDEV_ALIGN 32
485#define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
486
487static inline void *netdev_priv(struct net_device *dev)
488{
489 return (char *)dev + ((sizeof(struct net_device)
490 + NETDEV_ALIGN_CONST)
491 & ~NETDEV_ALIGN_CONST);
492}
493
494#define SET_MODULE_OWNER(dev) do { } while (0)
495/* Set the sysfs physical device reference for the network logical device
496 * if set prior to registration will cause a symlink during initialization.
497 */
498#define SET_NETDEV_DEV(net, pdev) ((net)->class_dev.dev = (pdev))
499
500struct packet_type {
f2ccd8fa
DM		 501 __be16 type; /* This is really htons(ether_type). */
502 struct net_device *dev; /* NULL is wildcarded here */
503 int (*func) (struct sk_buff *,
504 struct net_device *,
505 struct packet_type *,
506 struct net_device *);
1da177e4
LT		 507 void *af_packet_priv;
508 struct list_head list;
509};
510
511#include <linux/interrupt.h>
512#include <linux/notifier.h>
513
514extern struct net_device loopback_dev; /* The loopback */
515extern struct net_device *dev_base; /* All devices */
516extern rwlock_t dev_base_lock; /* Device list lock */
517
518extern int netdev_boot_setup_check(struct net_device *dev);
519extern unsigned long netdev_boot_base(const char *prefix, int unit);
520extern struct net_device *dev_getbyhwaddr(unsigned short type, char *hwaddr);
521extern struct net_device *dev_getfirstbyhwtype(unsigned short type);
522extern void dev_add_pack(struct packet_type *pt);
523extern void dev_remove_pack(struct packet_type *pt);
524extern void __dev_remove_pack(struct packet_type *pt);
525
526extern struct net_device *dev_get_by_flags(unsigned short flags,
527 unsigned short mask);
528extern struct net_device *dev_get_by_name(const char *name);
529extern struct net_device *__dev_get_by_name(const char *name);
530extern int dev_alloc_name(struct net_device *dev, const char *name);
531extern int dev_open(struct net_device *dev);
532extern int dev_close(struct net_device *dev);
533extern int dev_queue_xmit(struct sk_buff *skb);
534extern int register_netdevice(struct net_device *dev);
535extern int unregister_netdevice(struct net_device *dev);
536extern void free_netdev(struct net_device *dev);
537extern void synchronize_net(void);
538extern int register_netdevice_notifier(struct notifier_block *nb);
539extern int unregister_netdevice_notifier(struct notifier_block *nb);
540extern int call_netdevice_notifiers(unsigned long val, void *v);
541extern struct net_device *dev_get_by_index(int ifindex);
542extern struct net_device *__dev_get_by_index(int ifindex);
543extern int dev_restart(struct net_device *dev);
544#ifdef CONFIG_NETPOLL_TRAP
545extern int netpoll_trap(void);
546#endif
547
548typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
549extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
550static inline int unregister_gifconf(unsigned int family)
551{
552 return register_gifconf(family, NULL);
553}
554
555/*
556 * Incoming packets are placed on per-cpu queues so that
557 * no locking is needed.
558 */
559
560struct softnet_data
561{
31aa02c5 562 struct net_device *output_queue;
1da177e4
LT		 563 struct sk_buff_head input_pkt_queue;
564 struct list_head poll_list;
1da177e4
LT		 565 struct sk_buff *completion_queue;
566
567 struct net_device backlog_dev; /* Sorry. 8) */
568};
569
570DECLARE_PER_CPU(struct softnet_data,softnet_data);
571
572#define HAVE_NETIF_QUEUE
573
574static inline void __netif_schedule(struct net_device *dev)
575{
576 if (!test_and_set_bit(__LINK_STATE_SCHED, &dev->state)) {
577 unsigned long flags;
578 struct softnet_data *sd;
579
580 local_irq_save(flags);
581 sd = &__get_cpu_var(softnet_data);
582 dev->next_sched = sd->output_queue;
583 sd->output_queue = dev;
584 raise_softirq_irqoff(NET_TX_SOFTIRQ);
585 local_irq_restore(flags);
586 }
587}
588
589static inline void netif_schedule(struct net_device *dev)
590{
591 if (!test_bit(__LINK_STATE_XOFF, &dev->state))
592 __netif_schedule(dev);
593}
594
595static inline void netif_start_queue(struct net_device *dev)
596{
597 clear_bit(__LINK_STATE_XOFF, &dev->state);
598}
599
600static inline void netif_wake_queue(struct net_device *dev)
601{
602#ifdef CONFIG_NETPOLL_TRAP
603 if (netpoll_trap())
604 return;
605#endif
606 if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state))
607 __netif_schedule(dev);
608}
609
610static inline void netif_stop_queue(struct net_device *dev)
611{
612#ifdef CONFIG_NETPOLL_TRAP
613 if (netpoll_trap())
614 return;
615#endif
616 set_bit(__LINK_STATE_XOFF, &dev->state);
617}
618
619static inline int netif_queue_stopped(const struct net_device *dev)
620{
621 return test_bit(__LINK_STATE_XOFF, &dev->state);
622}
623
624static inline int netif_running(const struct net_device *dev)
625{
626 return test_bit(__LINK_STATE_START, &dev->state);
627}
628
629
630/* Use this variant when it is known for sure that it
631 * is executing from interrupt context.
632 */
633static inline void dev_kfree_skb_irq(struct sk_buff *skb)
634{
635 if (atomic_dec_and_test(&skb->users)) {
636 struct softnet_data *sd;
637 unsigned long flags;
638
639 local_irq_save(flags);
640 sd = &__get_cpu_var(softnet_data);
641 skb->next = sd->completion_queue;
642 sd->completion_queue = skb;
643 raise_softirq_irqoff(NET_TX_SOFTIRQ);
644 local_irq_restore(flags);
645 }
646}
647
648/* Use this variant in places where it could be invoked
649 * either from interrupt or non-interrupt context.
650 */
651static inline void dev_kfree_skb_any(struct sk_buff *skb)
652{
653 if (in_irq() || irqs_disabled())
654 dev_kfree_skb_irq(skb);
655 else
656 dev_kfree_skb(skb);
657}
658
659#define HAVE_NETIF_RX 1
660extern int netif_rx(struct sk_buff *skb);
661extern int netif_rx_ni(struct sk_buff *skb);
662#define HAVE_NETIF_RECEIVE_SKB 1
663extern int netif_receive_skb(struct sk_buff *skb);
664extern int dev_ioctl(unsigned int cmd, void __user *);
665extern int dev_ethtool(struct ifreq *);
666extern unsigned dev_get_flags(const struct net_device *);
667extern int dev_change_flags(struct net_device *, unsigned);
668extern int dev_change_name(struct net_device *, char *);
669extern int dev_set_mtu(struct net_device *, int);
670extern int dev_set_mac_address(struct net_device *,
671 struct sockaddr *);
672extern void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev);
673
674extern void dev_init(void);
675
676extern int netdev_nit;
20380731 677extern int netdev_budget;
1da177e4
LT		 678
679/* Called by rtnetlink.c:rtnl_unlock() */
680extern void netdev_run_todo(void);
681
682static inline void dev_put(struct net_device *dev)
683{
684 atomic_dec(&dev->refcnt);
685}
686
687#define __dev_put(dev) atomic_dec(&(dev)->refcnt)
688#define dev_hold(dev) atomic_inc(&(dev)->refcnt)
689
690/* Carrier loss detection, dial on demand. The functions netif_carrier_on
691 * and _off may be called from IRQ context, but it is caller
692 * who is responsible for serialization of these calls.
693 */
694
695extern void linkwatch_fire_event(struct net_device *dev);
696
697static inline int netif_carrier_ok(const struct net_device *dev)
698{
699 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
700}
701
702extern void __netdev_watchdog_up(struct net_device *dev);
703
0a242efc 704extern void netif_carrier_on(struct net_device *dev);
1da177e4 705
0a242efc 706extern void netif_carrier_off(struct net_device *dev);
1da177e4
LT		 707
708/* Hot-plugging. */
709static inline int netif_device_present(struct net_device *dev)
710{
711 return test_bit(__LINK_STATE_PRESENT, &dev->state);
712}
713
714static inline void netif_device_detach(struct net_device *dev)
715{
716 if (test_and_clear_bit(__LINK_STATE_PRESENT, &dev->state) &&
717 netif_running(dev)) {
718 netif_stop_queue(dev);
719 }
720}
721
722static inline void netif_device_attach(struct net_device *dev)
723{
724 if (!test_and_set_bit(__LINK_STATE_PRESENT, &dev->state) &&
725 netif_running(dev)) {
726 netif_wake_queue(dev);
727 __netdev_watchdog_up(dev);
728 }
729}
730
731/*
732 * Network interface message level settings
733 */
734#define HAVE_NETIF_MSG 1
735
736enum {
737 NETIF_MSG_DRV = 0x0001,
738 NETIF_MSG_PROBE = 0x0002,
739 NETIF_MSG_LINK = 0x0004,
740 NETIF_MSG_TIMER = 0x0008,
741 NETIF_MSG_IFDOWN = 0x0010,
742 NETIF_MSG_IFUP = 0x0020,
743 NETIF_MSG_RX_ERR = 0x0040,
744 NETIF_MSG_TX_ERR = 0x0080,
745 NETIF_MSG_TX_QUEUED = 0x0100,
746 NETIF_MSG_INTR = 0x0200,
747 NETIF_MSG_TX_DONE = 0x0400,
748 NETIF_MSG_RX_STATUS = 0x0800,
749 NETIF_MSG_PKTDATA = 0x1000,
750 NETIF_MSG_HW = 0x2000,
751 NETIF_MSG_WOL = 0x4000,
752};
753
754#define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
755#define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
756#define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
757#define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
758#define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
759#define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
760#define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
761#define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
762#define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
763#define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
764#define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
765#define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
766#define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
767#define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
768#define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
769
770static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
771{
772 /* use default */
773 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
774 return default_msg_enable_bits;
775 if (debug_value == 0) /* no output */
776 return 0;
777 /* set low N bits */
778 return (1 << debug_value) - 1;
779}
780
781/* Schedule rx intr now? */
782
783static inline int netif_rx_schedule_prep(struct net_device *dev)
784{
785 return netif_running(dev) &&
786 !test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state);
787}
788
789/* Add interface to tail of rx poll list. This assumes that _prep has
790 * already been called and returned 1.
791 */
792
793static inline void __netif_rx_schedule(struct net_device *dev)
794{
795 unsigned long flags;
796
797 local_irq_save(flags);
798 dev_hold(dev);
799 list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
800 if (dev->quota < 0)
801 dev->quota += dev->weight;
802 else
803 dev->quota = dev->weight;
804 __raise_softirq_irqoff(NET_RX_SOFTIRQ);
805 local_irq_restore(flags);
806}
807
808/* Try to reschedule poll. Called by irq handler. */
809
810static inline void netif_rx_schedule(struct net_device *dev)
811{
812 if (netif_rx_schedule_prep(dev))
813 __netif_rx_schedule(dev);
814}
815
816/* Try to reschedule poll. Called by dev->poll() after netif_rx_complete().
817 * Do not inline this?
818 */
819static inline int netif_rx_reschedule(struct net_device *dev, int undo)
820{
821 if (netif_rx_schedule_prep(dev)) {
822 unsigned long flags;
823
824 dev->quota += undo;
825
826 local_irq_save(flags);
827 list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
828 __raise_softirq_irqoff(NET_RX_SOFTIRQ);
829 local_irq_restore(flags);
830 return 1;
831 }
832 return 0;
833}
834
835/* Remove interface from poll list: it must be in the poll list
836 * on current cpu. This primitive is called by dev->poll(), when
837 * it completes the work. The device cannot be out of poll list at this
838 * moment, it is BUG().
839 */
840static inline void netif_rx_complete(struct net_device *dev)
841{
842 unsigned long flags;
843
844 local_irq_save(flags);
845 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
846 list_del(&dev->poll_list);
847 smp_mb__before_clear_bit();
848 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
849 local_irq_restore(flags);
850}
851
852static inline void netif_poll_disable(struct net_device *dev)
853{
854 while (test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state)) {
855 /* No hurry. */
856 current->state = TASK_INTERRUPTIBLE;
857 schedule_timeout(1);
858 }
859}
860
861static inline void netif_poll_enable(struct net_device *dev)
862{
863 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
864}
865
866/* same as netif_rx_complete, except that local_irq_save(flags)
867 * has already been issued
868 */
869static inline void __netif_rx_complete(struct net_device *dev)
870{
871 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
872 list_del(&dev->poll_list);
873 smp_mb__before_clear_bit();
874 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
875}
876
877static inline void netif_tx_disable(struct net_device *dev)
878{
879 spin_lock_bh(&dev->xmit_lock);
880 netif_stop_queue(dev);
881 spin_unlock_bh(&dev->xmit_lock);
882}
883
884/* These functions live elsewhere (drivers/net/net_init.c, but related) */
885
886extern void ether_setup(struct net_device *dev);
887
888/* Support for loadable net-drivers */
889extern struct net_device *alloc_netdev(int sizeof_priv, const char *name,
890 void (*setup)(struct net_device *));
891extern int register_netdev(struct net_device *dev);
892extern void unregister_netdev(struct net_device *dev);
893/* Functions used for multicast support */
894extern void dev_mc_upload(struct net_device *dev);
895extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
896extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
897extern void dev_mc_discard(struct net_device *dev);
898extern void dev_set_promiscuity(struct net_device *dev, int inc);
899extern void dev_set_allmulti(struct net_device *dev, int inc);
900extern void netdev_state_change(struct net_device *dev);
d8a33ac4 901extern void netdev_features_change(struct net_device *dev);
1da177e4
LT		 902/* Load a device via the kmod */
903extern void dev_load(const char *name);
904extern void dev_mcast_init(void);
905extern int netdev_max_backlog;
906extern int weight_p;
907extern int netdev_set_master(struct net_device *dev, struct net_device *master);
908extern int skb_checksum_help(struct sk_buff *skb, int inward);
909/* rx skb timestamps */
910extern void net_enable_timestamp(void);
911extern void net_disable_timestamp(void);
912
20380731
ACM		 913#ifdef CONFIG_PROC_FS
914extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
915extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
916extern void dev_seq_stop(struct seq_file *seq, void *v);
917#endif
918
919extern void linkwatch_run_queue(void);
920
1da177e4
LT		 921#endif /* __KERNEL__ */
922
923#endif /* _LINUX_DEV_H */
kernel source for telekom puls (alcatel/mediatek)