]> bbs.cooldavid.org Git - net-next-2.6.git/blame - include/linux/netdevice.h
git://bbs.cooldavid.org / net-next-2.6.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
[TG3]: Convert to non-LLTX
[net-next-2.6.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>
db217334 40#include <linux/dmaengine.h>
1da177e4
LT		 41
42struct divert_blk;
43struct vlan_group;
44struct ethtool_ops;
115c1d6e 45struct netpoll_info;
1da177e4
LT		 46 /* source back-compat hooks */
47#define SET_ETHTOOL_OPS(netdev,ops) \
48 ( (netdev)->ethtool_ops = (ops) )
49
50#define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
51 functions are available. */
52#define HAVE_FREE_NETDEV /* free_netdev() */
53#define HAVE_NETDEV_PRIV /* netdev_priv() */
54
55#define NET_XMIT_SUCCESS 0
56#define NET_XMIT_DROP 1 /* skb dropped */
57#define NET_XMIT_CN 2 /* congestion notification */
58#define NET_XMIT_POLICED 3 /* skb is shot by police */
59#define NET_XMIT_BYPASS 4 /* packet does not leave via dequeue;
60 (TC use only - dev_queue_xmit
61 returns this as NET_XMIT_SUCCESS) */
62
63/* Backlog congestion levels */
64#define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
65#define NET_RX_DROP 1 /* packet dropped */
66#define NET_RX_CN_LOW 2 /* storm alert, just in case */
67#define NET_RX_CN_MOD 3 /* Storm on its way! */
68#define NET_RX_CN_HIGH 4 /* The storm is here */
69#define NET_RX_BAD 5 /* packet dropped due to kernel error */
70
71#define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
72
73#endif
74
75#define MAX_ADDR_LEN 32 /* Largest hardware address length */
76
77/* Driver transmit return codes */
78#define NETDEV_TX_OK 0 /* driver took care of packet */
79#define NETDEV_TX_BUSY 1 /* driver tx path was busy*/
80#define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */
81
82/*
83 * Compute the worst case header length according to the protocols
84 * used.
85 */
86
87#if !defined(CONFIG_AX25) && !defined(CONFIG_AX25_MODULE) && !defined(CONFIG_TR)
88#define LL_MAX_HEADER 32
89#else
90#if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
91#define LL_MAX_HEADER 96
92#else
93#define LL_MAX_HEADER 48
94#endif
95#endif
96
97#if !defined(CONFIG_NET_IPIP) && \
98 !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE)
99#define MAX_HEADER LL_MAX_HEADER
100#else
101#define MAX_HEADER (LL_MAX_HEADER + 48)
102#endif
103
104/*
105 * Network device statistics. Akin to the 2.0 ether stats but
106 * with byte counters.
107 */
108
109struct net_device_stats
110{
111 unsigned long rx_packets; /* total packets received */
112 unsigned long tx_packets; /* total packets transmitted */
113 unsigned long rx_bytes; /* total bytes received */
114 unsigned long tx_bytes; /* total bytes transmitted */
115 unsigned long rx_errors; /* bad packets received */
116 unsigned long tx_errors; /* packet transmit problems */
117 unsigned long rx_dropped; /* no space in linux buffers */
118 unsigned long tx_dropped; /* no space available in linux */
119 unsigned long multicast; /* multicast packets received */
120 unsigned long collisions;
121
122 /* detailed rx_errors: */
123 unsigned long rx_length_errors;
124 unsigned long rx_over_errors; /* receiver ring buff overflow */
125 unsigned long rx_crc_errors; /* recved pkt with crc error */
126 unsigned long rx_frame_errors; /* recv'd frame alignment error */
127 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
128 unsigned long rx_missed_errors; /* receiver missed packet */
129
130 /* detailed tx_errors */
131 unsigned long tx_aborted_errors;
132 unsigned long tx_carrier_errors;
133 unsigned long tx_fifo_errors;
134 unsigned long tx_heartbeat_errors;
135 unsigned long tx_window_errors;
136
137 /* for cslip etc */
138 unsigned long rx_compressed;
139 unsigned long tx_compressed;
140};
141
142
143/* Media selection options. */
144enum {
145 IF_PORT_UNKNOWN = 0,
146 IF_PORT_10BASE2,
147 IF_PORT_10BASET,
148 IF_PORT_AUI,
149 IF_PORT_100BASET,
150 IF_PORT_100BASETX,
151 IF_PORT_100BASEFX
152};
153
154#ifdef __KERNEL__
155
156#include <linux/cache.h>
157#include <linux/skbuff.h>
158
159struct neighbour;
160struct neigh_parms;
161struct sk_buff;
162
163struct netif_rx_stats
164{
165 unsigned total;
166 unsigned dropped;
167 unsigned time_squeeze;
1da177e4
LT		 168 unsigned cpu_collision;
169};
170
171DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
172
173
174/*
175 * We tag multicasts with these structures.
176 */
177
178struct dev_mc_list
179{
180 struct dev_mc_list *next;
181 __u8 dmi_addr[MAX_ADDR_LEN];
182 unsigned char dmi_addrlen;
183 int dmi_users;
184 int dmi_gusers;
185};
186
187struct hh_cache
188{
189 struct hh_cache *hh_next; /* Next entry */
190 atomic_t hh_refcnt; /* number of users */
191 unsigned short hh_type; /* protocol identifier, f.e ETH_P_IP
192 * NOTE: For VLANs, this will be the
193 * encapuslated type. --BLG
194 */
195 int hh_len; /* length of header */
196 int (*hh_output)(struct sk_buff *skb);
197 rwlock_t hh_lock;
198
199 /* cached hardware header; allow for machine alignment needs. */
200#define HH_DATA_MOD 16
201#define HH_DATA_OFF(__len) \
5ba0eac6 202 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
1da177e4
LT		 203#define HH_DATA_ALIGN(__len) \
204 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
205 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
206};
207
208/* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
209 * Alternative is:
210 * dev->hard_header_len ? (dev->hard_header_len +
211 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
212 *
213 * We could use other alignment values, but we must maintain the
214 * relationship HH alignment <= LL alignment.
215 */
216#define LL_RESERVED_SPACE(dev) \
217 (((dev)->hard_header_len&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
218#define LL_RESERVED_SPACE_EXTRA(dev,extra) \
219 ((((dev)->hard_header_len+extra)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
220
221/* These flag bits are private to the generic network queueing
222 * layer, they may not be explicitly referenced by any other
223 * code.
224 */
225
226enum netdev_state_t
227{
228 __LINK_STATE_XOFF=0,
229 __LINK_STATE_START,
230 __LINK_STATE_PRESENT,
231 __LINK_STATE_SCHED,
232 __LINK_STATE_NOCARRIER,
233 __LINK_STATE_RX_SCHED,
b00055aa
SR		 234 __LINK_STATE_LINKWATCH_PENDING,
235 __LINK_STATE_DORMANT,
1da177e4
LT		 236};
237
238
239/*
240 * This structure holds at boot time configured netdevice settings. They
241 * are then used in the device probing.
242 */
243struct netdev_boot_setup {
244 char name[IFNAMSIZ];
245 struct ifmap map;
246};
247#define NETDEV_BOOT_SETUP_MAX 8
248
20380731 249extern int __init netdev_boot_setup(char *str);
1da177e4
LT		 250
251/*
252 * The DEVICE structure.
253 * Actually, this whole structure is a big mistake. It mixes I/O
254 * data with strictly "high-level" data, and it has to know about
255 * almost every data structure used in the INET module.
256 *
257 * FIXME: cleanup struct net_device such that network protocol info
258 * moves out.
259 */
260
261struct net_device
262{
263
264 /*
265 * This is the first field of the "visible" part of this structure
266 * (i.e. as seen by users in the "Space.c" file). It is the name
267 * the interface.
268 */
269 char name[IFNAMSIZ];
9356b8fc
ED		 270 /* device name hash chain */
271 struct hlist_node name_hlist;
1da177e4
LT		 272
273 /*
274 * I/O specific fields
275 * FIXME: Merge these and struct ifmap into one
276 */
277 unsigned long mem_end; /* shared mem end */
278 unsigned long mem_start; /* shared mem start */
279 unsigned long base_addr; /* device I/O address */
280 unsigned int irq; /* device IRQ number */
281
282 /*
283 * Some hardware also needs these fields, but they are not
284 * part of the usual set specified in Space.c.
285 */
286
287 unsigned char if_port; /* Selectable AUI, TP,..*/
288 unsigned char dma; /* DMA channel */
289
290 unsigned long state;
291
292 struct net_device *next;
293
294 /* The device initialization function. Called only once. */
295 int (*init)(struct net_device *dev);
296
297 /* ------- Fields preinitialized in Space.c finish here ------- */
298
9356b8fc
ED		 299 /* Net device features */
300 unsigned long features;
301#define NETIF_F_SG 1 /* Scatter/gather IO. */
302#define NETIF_F_IP_CSUM 2 /* Can checksum only TCP/UDP over IPv4. */
303#define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
304#define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
305#define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
306#define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
307#define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
308#define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
309#define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
310#define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
311#define NETIF_F_TSO 2048 /* Can offload TCP/IP segmentation */
312#define NETIF_F_LLTX 4096 /* LockLess TX */
e89e9cf5 313#define NETIF_F_UFO 8192 /* Can offload UDP Large Send*/
9356b8fc 314
1da177e4
LT		 315 struct net_device *next_sched;
316
317 /* Interface index. Unique device identifier */
318 int ifindex;
319 int iflink;
320
321
322 struct net_device_stats* (*get_stats)(struct net_device *dev);
323 struct iw_statistics* (*get_wireless_stats)(struct net_device *dev);
324
325 /* List of functions to handle Wireless Extensions (instead of ioctl).
326 * See <net/iw_handler.h> for details. Jean II */
327 const struct iw_handler_def * wireless_handlers;
328 /* Instance data managed by the core of Wireless Extensions. */
329 struct iw_public_data * wireless_data;
330
331 struct ethtool_ops *ethtool_ops;
332
333 /*
334 * This marks the end of the "visible" part of the structure. All
335 * fields hereafter are internal to the system, and may change at
336 * will (read: may be cleaned up at will).
337 */
338
1da177e4 339
b00055aa 340 unsigned int flags; /* interface flags (a la BSD) */
1da177e4
LT		 341 unsigned short gflags;
342 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
343 unsigned short padded; /* How much padding added by alloc_netdev() */
344
b00055aa
SR		 345 unsigned char operstate; /* RFC2863 operstate */
346 unsigned char link_mode; /* mapping policy to operstate */
347
1da177e4
LT		 348 unsigned mtu; /* interface MTU value */
349 unsigned short type; /* interface hardware type */
350 unsigned short hard_header_len; /* hardware hdr length */
1da177e4
LT		 351
352 struct net_device *master; /* Pointer to master device of a group,
353 * which this device is member of.
354 */
355
356 /* Interface address info. */
a6f9a705 357 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
1da177e4
LT		 358 unsigned char addr_len; /* hardware address length */
359 unsigned short dev_id; /* for shared network cards */
360
361 struct dev_mc_list *mc_list; /* Multicast mac addresses */
362 int mc_count; /* Number of installed mcasts */
363 int promiscuity;
364 int allmulti;
365
1da177e4
LT		 366
367 /* Protocol specific pointers */
368
369 void *atalk_ptr; /* AppleTalk link */
370 void *ip_ptr; /* IPv4 specific data */
371 void *dn_ptr; /* DECnet specific data */
372 void *ip6_ptr; /* IPv6 specific data */
373 void *ec_ptr; /* Econet specific data */
374 void *ax25_ptr; /* AX.25 specific data */
375
9356b8fc
ED		 376/*
377 * Cache line mostly used on receive path (including eth_type_trans())
378 */
379 struct list_head poll_list ____cacheline_aligned_in_smp;
380 /* Link to poll list */
381
382 int (*poll) (struct net_device *dev, int *quota);
1da177e4
LT		 383 int quota;
384 int weight;
9356b8fc
ED		 385 unsigned long last_rx; /* Time of last Rx */
386 /* Interface address info used in eth_type_trans() */
387 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
388 because most packets are unicast) */
389
390 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
1da177e4 391
9356b8fc
ED		 392/*
393 * Cache line mostly used on queue transmit path (qdisc)
394 */
395 /* device queue lock */
396 spinlock_t queue_lock ____cacheline_aligned_in_smp;
1da177e4
LT		 397 struct Qdisc *qdisc;
398 struct Qdisc *qdisc_sleeping;
1da177e4
LT		 399 struct list_head qdisc_list;
400 unsigned long tx_queue_len; /* Max frames per queue allowed */
401
402 /* ingress path synchronizer */
403 spinlock_t ingress_lock;
9356b8fc
ED		 404 struct Qdisc *qdisc_ingress;
405
406/*
407 * One part is mostly used on xmit path (device)
408 */
1da177e4 409 /* hard_start_xmit synchronizer */
932ff279 410 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
1da177e4
LT		 411 /* cpu id of processor entered to hard_start_xmit or -1,
412 if nobody entered there.
413 */
414 int xmit_lock_owner;
9356b8fc
ED		 415 void *priv; /* pointer to private data */
416 int (*hard_start_xmit) (struct sk_buff *skb,
417 struct net_device *dev);
418 /* These may be needed for future network-power-down code. */
419 unsigned long trans_start; /* Time (in jiffies) of last Tx */
420
421 int watchdog_timeo; /* used by dev_watchdog() */
422 struct timer_list watchdog_timer;
423
424/*
425 * refcnt is a very hot point, so align it on SMP
426 */
1da177e4 427 /* Number of references to this device */
9356b8fc
ED		 428 atomic_t refcnt ____cacheline_aligned_in_smp;
429
1da177e4
LT		 430 /* delayed register/unregister */
431 struct list_head todo_list;
1da177e4
LT		 432 /* device index hash chain */
433 struct hlist_node index_hlist;
434
435 /* register/unregister state machine */
436 enum { NETREG_UNINITIALIZED=0,
b17a7c17 437 NETREG_REGISTERED, /* completed register_netdevice */
1da177e4
LT		 438 NETREG_UNREGISTERING, /* called unregister_netdevice */
439 NETREG_UNREGISTERED, /* completed unregister todo */
440 NETREG_RELEASED, /* called free_netdev */
441 } reg_state;
442
1da177e4
LT		 443 /* Called after device is detached from network. */
444 void (*uninit)(struct net_device *dev);
445 /* Called after last user reference disappears. */
446 void (*destructor)(struct net_device *dev);
447
448 /* Pointers to interface service routines. */
449 int (*open)(struct net_device *dev);
450 int (*stop)(struct net_device *dev);
1da177e4 451#define HAVE_NETDEV_POLL
1da177e4
LT		 452 int (*hard_header) (struct sk_buff *skb,
453 struct net_device *dev,
454 unsigned short type,
455 void *daddr,
456 void *saddr,
457 unsigned len);
458 int (*rebuild_header)(struct sk_buff *skb);
459#define HAVE_MULTICAST
460 void (*set_multicast_list)(struct net_device *dev);
461#define HAVE_SET_MAC_ADDR
462 int (*set_mac_address)(struct net_device *dev,
463 void *addr);
464#define HAVE_PRIVATE_IOCTL
465 int (*do_ioctl)(struct net_device *dev,
466 struct ifreq *ifr, int cmd);
467#define HAVE_SET_CONFIG
468 int (*set_config)(struct net_device *dev,
469 struct ifmap *map);
470#define HAVE_HEADER_CACHE
471 int (*hard_header_cache)(struct neighbour *neigh,
472 struct hh_cache *hh);
473 void (*header_cache_update)(struct hh_cache *hh,
474 struct net_device *dev,
475 unsigned char * haddr);
476#define HAVE_CHANGE_MTU
477 int (*change_mtu)(struct net_device *dev, int new_mtu);
478
479#define HAVE_TX_TIMEOUT
480 void (*tx_timeout) (struct net_device *dev);
481
482 void (*vlan_rx_register)(struct net_device *dev,
483 struct vlan_group *grp);
484 void (*vlan_rx_add_vid)(struct net_device *dev,
485 unsigned short vid);
486 void (*vlan_rx_kill_vid)(struct net_device *dev,
487 unsigned short vid);
488
489 int (*hard_header_parse)(struct sk_buff *skb,
490 unsigned char *haddr);
491 int (*neigh_setup)(struct net_device *dev, struct neigh_parms *);
492#ifdef CONFIG_NETPOLL
115c1d6e 493 struct netpoll_info *npinfo;
1da177e4
LT		 494#endif
495#ifdef CONFIG_NET_POLL_CONTROLLER
496 void (*poll_controller)(struct net_device *dev);
497#endif
498
499 /* bridge stuff */
500 struct net_bridge_port *br_port;
501
502#ifdef CONFIG_NET_DIVERT
503 /* this will get initialized at each interface type init routine */
504 struct divert_blk *divert;
505#endif /* CONFIG_NET_DIVERT */
506
507 /* class/net/name entry */
508 struct class_device class_dev;
fe9925b5
SH		 509 /* space for optional statistics and wireless sysfs groups */
510 struct attribute_group *sysfs_groups[3];
1da177e4
LT		 511};
512
513#define NETDEV_ALIGN 32
514#define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
515
516static inline void *netdev_priv(struct net_device *dev)
517{
518 return (char *)dev + ((sizeof(struct net_device)
519 + NETDEV_ALIGN_CONST)
520 & ~NETDEV_ALIGN_CONST);
521}
522
523#define SET_MODULE_OWNER(dev) do { } while (0)
524/* Set the sysfs physical device reference for the network logical device
525 * if set prior to registration will cause a symlink during initialization.
526 */
527#define SET_NETDEV_DEV(net, pdev) ((net)->class_dev.dev = (pdev))
528
529struct packet_type {
f2ccd8fa
DM		 530 __be16 type; /* This is really htons(ether_type). */
531 struct net_device *dev; /* NULL is wildcarded here */
532 int (*func) (struct sk_buff *,
533 struct net_device *,
534 struct packet_type *,
535 struct net_device *);
1da177e4
LT		 536 void *af_packet_priv;
537 struct list_head list;
538};
539
540#include <linux/interrupt.h>
541#include <linux/notifier.h>
542
543extern struct net_device loopback_dev; /* The loopback */
544extern struct net_device *dev_base; /* All devices */
545extern rwlock_t dev_base_lock; /* Device list lock */
546
547extern int netdev_boot_setup_check(struct net_device *dev);
548extern unsigned long netdev_boot_base(const char *prefix, int unit);
549extern struct net_device *dev_getbyhwaddr(unsigned short type, char *hwaddr);
550extern struct net_device *dev_getfirstbyhwtype(unsigned short type);
551extern void dev_add_pack(struct packet_type *pt);
552extern void dev_remove_pack(struct packet_type *pt);
553extern void __dev_remove_pack(struct packet_type *pt);
554
555extern struct net_device *dev_get_by_flags(unsigned short flags,
556 unsigned short mask);
557extern struct net_device *dev_get_by_name(const char *name);
558extern struct net_device *__dev_get_by_name(const char *name);
559extern int dev_alloc_name(struct net_device *dev, const char *name);
560extern int dev_open(struct net_device *dev);
561extern int dev_close(struct net_device *dev);
562extern int dev_queue_xmit(struct sk_buff *skb);
563extern int register_netdevice(struct net_device *dev);
564extern int unregister_netdevice(struct net_device *dev);
565extern void free_netdev(struct net_device *dev);
566extern void synchronize_net(void);
567extern int register_netdevice_notifier(struct notifier_block *nb);
568extern int unregister_netdevice_notifier(struct notifier_block *nb);
569extern int call_netdevice_notifiers(unsigned long val, void *v);
570extern struct net_device *dev_get_by_index(int ifindex);
571extern struct net_device *__dev_get_by_index(int ifindex);
572extern int dev_restart(struct net_device *dev);
573#ifdef CONFIG_NETPOLL_TRAP
574extern int netpoll_trap(void);
575#endif
576
577typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
578extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
579static inline int unregister_gifconf(unsigned int family)
580{
581 return register_gifconf(family, NULL);
582}
583
584/*
585 * Incoming packets are placed on per-cpu queues so that
586 * no locking is needed.
587 */
588
589struct softnet_data
590{
31aa02c5 591 struct net_device *output_queue;
1da177e4
LT		 592 struct sk_buff_head input_pkt_queue;
593 struct list_head poll_list;
1da177e4
LT		 594 struct sk_buff *completion_queue;
595
596 struct net_device backlog_dev; /* Sorry. 8) */
db217334
CL		 597#ifdef CONFIG_NET_DMA
598 struct dma_chan *net_dma;
599#endif
1da177e4
LT		 600};
601
602DECLARE_PER_CPU(struct softnet_data,softnet_data);
603
604#define HAVE_NETIF_QUEUE
605
56079431 606extern void __netif_schedule(struct net_device *dev);
1da177e4
LT		 607
608static inline void netif_schedule(struct net_device *dev)
609{
610 if (!test_bit(__LINK_STATE_XOFF, &dev->state))
611 __netif_schedule(dev);
612}
613
614static inline void netif_start_queue(struct net_device *dev)
615{
616 clear_bit(__LINK_STATE_XOFF, &dev->state);
617}
618
619static inline void netif_wake_queue(struct net_device *dev)
620{
621#ifdef CONFIG_NETPOLL_TRAP
622 if (netpoll_trap())
623 return;
624#endif
625 if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state))
626 __netif_schedule(dev);
627}
628
629static inline void netif_stop_queue(struct net_device *dev)
630{
631#ifdef CONFIG_NETPOLL_TRAP
632 if (netpoll_trap())
633 return;
634#endif
635 set_bit(__LINK_STATE_XOFF, &dev->state);
636}
637
638static inline int netif_queue_stopped(const struct net_device *dev)
639{
640 return test_bit(__LINK_STATE_XOFF, &dev->state);
641}
642
643static inline int netif_running(const struct net_device *dev)
644{
645 return test_bit(__LINK_STATE_START, &dev->state);
646}
647
648
649/* Use this variant when it is known for sure that it
650 * is executing from interrupt context.
651 */
652static inline void dev_kfree_skb_irq(struct sk_buff *skb)
653{
654 if (atomic_dec_and_test(&skb->users)) {
655 struct softnet_data *sd;
656 unsigned long flags;
657
658 local_irq_save(flags);
659 sd = &__get_cpu_var(softnet_data);
660 skb->next = sd->completion_queue;
661 sd->completion_queue = skb;
662 raise_softirq_irqoff(NET_TX_SOFTIRQ);
663 local_irq_restore(flags);
664 }
665}
666
667/* Use this variant in places where it could be invoked
668 * either from interrupt or non-interrupt context.
669 */
56079431 670extern void dev_kfree_skb_any(struct sk_buff *skb);
1da177e4
LT		 671
672#define HAVE_NETIF_RX 1
673extern int netif_rx(struct sk_buff *skb);
674extern int netif_rx_ni(struct sk_buff *skb);
675#define HAVE_NETIF_RECEIVE_SKB 1
676extern int netif_receive_skb(struct sk_buff *skb);
c2373ee9 677extern int dev_valid_name(const char *name);
1da177e4
LT		 678extern int dev_ioctl(unsigned int cmd, void __user *);
679extern int dev_ethtool(struct ifreq *);
680extern unsigned dev_get_flags(const struct net_device *);
681extern int dev_change_flags(struct net_device *, unsigned);
682extern int dev_change_name(struct net_device *, char *);
683extern int dev_set_mtu(struct net_device *, int);
684extern int dev_set_mac_address(struct net_device *,
685 struct sockaddr *);
686extern void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev);
687
688extern void dev_init(void);
689
690extern int netdev_nit;
20380731 691extern int netdev_budget;
1da177e4
LT		 692
693/* Called by rtnetlink.c:rtnl_unlock() */
694extern void netdev_run_todo(void);
695
696static inline void dev_put(struct net_device *dev)
697{
698 atomic_dec(&dev->refcnt);
699}
700
15333061
SH		 701static inline void dev_hold(struct net_device *dev)
702{
703 atomic_inc(&dev->refcnt);
704}
1da177e4
LT		 705
706/* Carrier loss detection, dial on demand. The functions netif_carrier_on
707 * and _off may be called from IRQ context, but it is caller
708 * who is responsible for serialization of these calls.
b00055aa
SR		 709 *
710 * The name carrier is inappropriate, these functions should really be
711 * called netif_lowerlayer_*() because they represent the state of any
712 * kind of lower layer not just hardware media.
1da177e4
LT		 713 */
714
715extern void linkwatch_fire_event(struct net_device *dev);
716
717static inline int netif_carrier_ok(const struct net_device *dev)
718{
719 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
720}
721
722extern void __netdev_watchdog_up(struct net_device *dev);
723
0a242efc 724extern void netif_carrier_on(struct net_device *dev);
1da177e4 725
0a242efc 726extern void netif_carrier_off(struct net_device *dev);
1da177e4 727
b00055aa
SR		 728static inline void netif_dormant_on(struct net_device *dev)
729{
730 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
731 linkwatch_fire_event(dev);
732}
733
734static inline void netif_dormant_off(struct net_device *dev)
735{
736 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
737 linkwatch_fire_event(dev);
738}
739
740static inline int netif_dormant(const struct net_device *dev)
741{
742 return test_bit(__LINK_STATE_DORMANT, &dev->state);
743}
744
745
746static inline int netif_oper_up(const struct net_device *dev) {
747 return (dev->operstate == IF_OPER_UP ||
748 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
749}
750
1da177e4
LT		 751/* Hot-plugging. */
752static inline int netif_device_present(struct net_device *dev)
753{
754 return test_bit(__LINK_STATE_PRESENT, &dev->state);
755}
756
56079431 757extern void netif_device_detach(struct net_device *dev);
1da177e4 758
56079431 759extern void netif_device_attach(struct net_device *dev);
1da177e4
LT		 760
761/*
762 * Network interface message level settings
763 */
764#define HAVE_NETIF_MSG 1
765
766enum {
767 NETIF_MSG_DRV = 0x0001,
768 NETIF_MSG_PROBE = 0x0002,
769 NETIF_MSG_LINK = 0x0004,
770 NETIF_MSG_TIMER = 0x0008,
771 NETIF_MSG_IFDOWN = 0x0010,
772 NETIF_MSG_IFUP = 0x0020,
773 NETIF_MSG_RX_ERR = 0x0040,
774 NETIF_MSG_TX_ERR = 0x0080,
775 NETIF_MSG_TX_QUEUED = 0x0100,
776 NETIF_MSG_INTR = 0x0200,
777 NETIF_MSG_TX_DONE = 0x0400,
778 NETIF_MSG_RX_STATUS = 0x0800,
779 NETIF_MSG_PKTDATA = 0x1000,
780 NETIF_MSG_HW = 0x2000,
781 NETIF_MSG_WOL = 0x4000,
782};
783
784#define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
785#define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
786#define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
787#define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
788#define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
789#define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
790#define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
791#define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
792#define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
793#define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
794#define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
795#define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
796#define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
797#define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
798#define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
799
800static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
801{
802 /* use default */
803 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
804 return default_msg_enable_bits;
805 if (debug_value == 0) /* no output */
806 return 0;
807 /* set low N bits */
808 return (1 << debug_value) - 1;
809}
810
0a122576
SH		 811/* Test if receive needs to be scheduled */
812static inline int __netif_rx_schedule_prep(struct net_device *dev)
793b883e
SH		 813{
814 return !test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state);
815}
1da177e4 816
0a122576 817/* Test if receive needs to be scheduled but only if up */
1da177e4
LT		 818static inline int netif_rx_schedule_prep(struct net_device *dev)
819{
0a122576 820 return netif_running(dev) && __netif_rx_schedule_prep(dev);
1da177e4
LT		 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
56079431 827extern void __netif_rx_schedule(struct net_device *dev);
1da177e4
LT		 828
829/* Try to reschedule poll. Called by irq handler. */
830
831static inline void netif_rx_schedule(struct net_device *dev)
832{
833 if (netif_rx_schedule_prep(dev))
834 __netif_rx_schedule(dev);
835}
836
d3240312
SH		 837/* Try to reschedule poll. Called by dev->poll() after netif_rx_complete().
838 * Do not inline this?
839 */
1da177e4
LT		 840static inline int netif_rx_reschedule(struct net_device *dev, int undo)
841{
842 if (netif_rx_schedule_prep(dev)) {
843 unsigned long flags;
d3240312
SH		 844
845 dev->quota += undo;
846
1da177e4 847 local_irq_save(flags);
d3240312
SH		 848 list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
849 __raise_softirq_irqoff(NET_RX_SOFTIRQ);
1da177e4
LT		 850 local_irq_restore(flags);
851 return 1;
852 }
853 return 0;
854}
855
856/* Remove interface from poll list: it must be in the poll list
857 * on current cpu. This primitive is called by dev->poll(), when
858 * it completes the work. The device cannot be out of poll list at this
859 * moment, it is BUG().
860 */
861static inline void netif_rx_complete(struct net_device *dev)
862{
863 unsigned long flags;
864
865 local_irq_save(flags);
866 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
867 list_del(&dev->poll_list);
868 smp_mb__before_clear_bit();
869 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
870 local_irq_restore(flags);
871}
872
873static inline void netif_poll_disable(struct net_device *dev)
874{
3173c890 875 while (test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state))
1da177e4 876 /* No hurry. */
3173c890 877 schedule_timeout_interruptible(1);
1da177e4
LT		 878}
879
880static inline void netif_poll_enable(struct net_device *dev)
881{
882 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
883}
884
885/* same as netif_rx_complete, except that local_irq_save(flags)
886 * has already been issued
887 */
888static inline void __netif_rx_complete(struct net_device *dev)
889{
890 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
891 list_del(&dev->poll_list);
892 smp_mb__before_clear_bit();
893 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
894}
895
932ff279
HX		 896static inline void netif_tx_lock(struct net_device *dev)
897{
898 spin_lock(&dev->_xmit_lock);
899 dev->xmit_lock_owner = smp_processor_id();
900}
901
902static inline void netif_tx_lock_bh(struct net_device *dev)
903{
904 spin_lock_bh(&dev->_xmit_lock);
905 dev->xmit_lock_owner = smp_processor_id();
906}
907
908static inline int netif_tx_trylock(struct net_device *dev)
909{
910 int err = spin_trylock(&dev->_xmit_lock);
911 if (!err)
912 dev->xmit_lock_owner = smp_processor_id();
913 return err;
914}
915
916static inline void netif_tx_unlock(struct net_device *dev)
917{
918 dev->xmit_lock_owner = -1;
919 spin_unlock(&dev->_xmit_lock);
920}
921
922static inline void netif_tx_unlock_bh(struct net_device *dev)
923{
924 dev->xmit_lock_owner = -1;
925 spin_unlock_bh(&dev->_xmit_lock);
926}
927
1da177e4
LT		 928static inline void netif_tx_disable(struct net_device *dev)
929{
932ff279 930 netif_tx_lock_bh(dev);
1da177e4 931 netif_stop_queue(dev);
932ff279 932 netif_tx_unlock_bh(dev);
1da177e4
LT		 933}
934
935/* These functions live elsewhere (drivers/net/net_init.c, but related) */
936
937extern void ether_setup(struct net_device *dev);
938
939/* Support for loadable net-drivers */
940extern struct net_device *alloc_netdev(int sizeof_priv, const char *name,
941 void (*setup)(struct net_device *));
942extern int register_netdev(struct net_device *dev);
943extern void unregister_netdev(struct net_device *dev);
944/* Functions used for multicast support */
945extern void dev_mc_upload(struct net_device *dev);
946extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
947extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
948extern void dev_mc_discard(struct net_device *dev);
949extern void dev_set_promiscuity(struct net_device *dev, int inc);
950extern void dev_set_allmulti(struct net_device *dev, int inc);
951extern void netdev_state_change(struct net_device *dev);
d8a33ac4 952extern void netdev_features_change(struct net_device *dev);
1da177e4
LT		 953/* Load a device via the kmod */
954extern void dev_load(const char *name);
955extern void dev_mcast_init(void);
956extern int netdev_max_backlog;
957extern int weight_p;
958extern int netdev_set_master(struct net_device *dev, struct net_device *master);
959extern int skb_checksum_help(struct sk_buff *skb, int inward);
fb286bb2
HX		 960#ifdef CONFIG_BUG
961extern void netdev_rx_csum_fault(struct net_device *dev);
962#else
963static inline void netdev_rx_csum_fault(struct net_device *dev)
964{
965}
966#endif
1da177e4
LT		 967/* rx skb timestamps */
968extern void net_enable_timestamp(void);
969extern void net_disable_timestamp(void);
970
20380731
ACM		 971#ifdef CONFIG_PROC_FS
972extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
973extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
974extern void dev_seq_stop(struct seq_file *seq, void *v);
975#endif
976
977extern void linkwatch_run_queue(void);
978
1da177e4
LT		 979#endif /* __KERNEL__ */
980
981#endif /* _LINUX_DEV_H */
Clone of davem's net-next-2.6 tree