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[PATCH] VT binding: fbcon: Update documentation
[linux-2.6/x86.git] / include / linux / netdevice.h
blobbc747e5d71389ed632d47feab10892b389a6e8e0
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
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/device.h>
38 #include <linux/percpu.h>
39 #include <linux/dmaengine.h>
40
41 struct divert_blk;
42 struct vlan_group;
43 struct ethtool_ops;
44 struct netpoll_info;
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 cpu_collision;
168 };
169
170 DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
171
172
173 /*
174 * We tag multicasts with these structures.
175 */
176
177 struct 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
186 struct 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) \
201 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
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
225 enum 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 __LINK_STATE_DORMANT,
235 __LINK_STATE_QDISC_RUNNING,
236 };
237
238
239 /*
240 * This structure holds at boot time configured netdevice settings. They
241 * are then used in the device probing.
242 */
243 struct netdev_boot_setup {
244 char name[IFNAMSIZ];
245 struct ifmap map;
246 };
247 #define NETDEV_BOOT_SETUP_MAX 8
248
249 extern int __init netdev_boot_setup(char *str);
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
261 struct 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];
270 /* device name hash chain */
271 struct hlist_node name_hlist;
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
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_GSO 2048 /* Enable software GSO. */
312 #define NETIF_F_LLTX 4096 /* LockLess TX */
313
314 /* Segmentation offload features */
315 #define NETIF_F_GSO_SHIFT 16
316 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
317 #define NETIF_F_UFO (SKB_GSO_UDPV4 << NETIF_F_GSO_SHIFT)
318
319 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
320 #define NETIF_F_ALL_CSUM (NETIF_F_IP_CSUM | NETIF_F_GEN_CSUM)
321
322 struct net_device *next_sched;
323
324 /* Interface index. Unique device identifier */
325 int ifindex;
326 int iflink;
327
328
329 struct net_device_stats* (*get_stats)(struct net_device *dev);
330 struct iw_statistics* (*get_wireless_stats)(struct net_device *dev);
331
332 /* List of functions to handle Wireless Extensions (instead of ioctl).
333 * See <net/iw_handler.h> for details. Jean II */
334 const struct iw_handler_def * wireless_handlers;
335 /* Instance data managed by the core of Wireless Extensions. */
336 struct iw_public_data * wireless_data;
337
338 struct ethtool_ops *ethtool_ops;
339
340 /*
341 * This marks the end of the "visible" part of the structure. All
342 * fields hereafter are internal to the system, and may change at
343 * will (read: may be cleaned up at will).
344 */
345
346
347 unsigned int flags; /* interface flags (a la BSD) */
348 unsigned short gflags;
349 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
350 unsigned short padded; /* How much padding added by alloc_netdev() */
351
352 unsigned char operstate; /* RFC2863 operstate */
353 unsigned char link_mode; /* mapping policy to operstate */
354
355 unsigned mtu; /* interface MTU value */
356 unsigned short type; /* interface hardware type */
357 unsigned short hard_header_len; /* hardware hdr length */
358
359 struct net_device *master; /* Pointer to master device of a group,
360 * which this device is member of.
361 */
362
363 /* Interface address info. */
364 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
365 unsigned char addr_len; /* hardware address length */
366 unsigned short dev_id; /* for shared network cards */
367
368 struct dev_mc_list *mc_list; /* Multicast mac addresses */
369 int mc_count; /* Number of installed mcasts */
370 int promiscuity;
371 int allmulti;
372
373
374 /* Protocol specific pointers */
375
376 void *atalk_ptr; /* AppleTalk link */
377 void *ip_ptr; /* IPv4 specific data */
378 void *dn_ptr; /* DECnet specific data */
379 void *ip6_ptr; /* IPv6 specific data */
380 void *ec_ptr; /* Econet specific data */
381 void *ax25_ptr; /* AX.25 specific data */
382
383 /*
384 * Cache line mostly used on receive path (including eth_type_trans())
385 */
386 struct list_head poll_list ____cacheline_aligned_in_smp;
387 /* Link to poll list */
388
389 int (*poll) (struct net_device *dev, int *quota);
390 int quota;
391 int weight;
392 unsigned long last_rx; /* Time of last Rx */
393 /* Interface address info used in eth_type_trans() */
394 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
395 because most packets are unicast) */
396
397 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
398
399 /*
400 * Cache line mostly used on queue transmit path (qdisc)
401 */
402 /* device queue lock */
403 spinlock_t queue_lock ____cacheline_aligned_in_smp;
404 struct Qdisc *qdisc;
405 struct Qdisc *qdisc_sleeping;
406 struct list_head qdisc_list;
407 unsigned long tx_queue_len; /* Max frames per queue allowed */
408
409 /* Partially transmitted GSO packet. */
410 struct sk_buff *gso_skb;
411
412 /* ingress path synchronizer */
413 spinlock_t ingress_lock;
414 struct Qdisc *qdisc_ingress;
415
416 /*
417 * One part is mostly used on xmit path (device)
418 */
419 /* hard_start_xmit synchronizer */
420 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
421 /* cpu id of processor entered to hard_start_xmit or -1,
422 if nobody entered there.
423 */
424 int xmit_lock_owner;
425 void *priv; /* pointer to private data */
426 int (*hard_start_xmit) (struct sk_buff *skb,
427 struct net_device *dev);
428 /* These may be needed for future network-power-down code. */
429 unsigned long trans_start; /* Time (in jiffies) of last Tx */
430
431 int watchdog_timeo; /* used by dev_watchdog() */
432 struct timer_list watchdog_timer;
433
434 /*
435 * refcnt is a very hot point, so align it on SMP
436 */
437 /* Number of references to this device */
438 atomic_t refcnt ____cacheline_aligned_in_smp;
439
440 /* delayed register/unregister */
441 struct list_head todo_list;
442 /* device index hash chain */
443 struct hlist_node index_hlist;
444
445 /* register/unregister state machine */
446 enum { NETREG_UNINITIALIZED=0,
447 NETREG_REGISTERED, /* completed register_netdevice */
448 NETREG_UNREGISTERING, /* called unregister_netdevice */
449 NETREG_UNREGISTERED, /* completed unregister todo */
450 NETREG_RELEASED, /* called free_netdev */
451 } reg_state;
452
453 /* Called after device is detached from network. */
454 void (*uninit)(struct net_device *dev);
455 /* Called after last user reference disappears. */
456 void (*destructor)(struct net_device *dev);
457
458 /* Pointers to interface service routines. */
459 int (*open)(struct net_device *dev);
460 int (*stop)(struct net_device *dev);
461 #define HAVE_NETDEV_POLL
462 int (*hard_header) (struct sk_buff *skb,
463 struct net_device *dev,
464 unsigned short type,
465 void *daddr,
466 void *saddr,
467 unsigned len);
468 int (*rebuild_header)(struct sk_buff *skb);
469 #define HAVE_MULTICAST
470 void (*set_multicast_list)(struct net_device *dev);
471 #define HAVE_SET_MAC_ADDR
472 int (*set_mac_address)(struct net_device *dev,
473 void *addr);
474 #define HAVE_PRIVATE_IOCTL
475 int (*do_ioctl)(struct net_device *dev,
476 struct ifreq *ifr, int cmd);
477 #define HAVE_SET_CONFIG
478 int (*set_config)(struct net_device *dev,
479 struct ifmap *map);
480 #define HAVE_HEADER_CACHE
481 int (*hard_header_cache)(struct neighbour *neigh,
482 struct hh_cache *hh);
483 void (*header_cache_update)(struct hh_cache *hh,
484 struct net_device *dev,
485 unsigned char * haddr);
486 #define HAVE_CHANGE_MTU
487 int (*change_mtu)(struct net_device *dev, int new_mtu);
488
489 #define HAVE_TX_TIMEOUT
490 void (*tx_timeout) (struct net_device *dev);
491
492 void (*vlan_rx_register)(struct net_device *dev,
493 struct vlan_group *grp);
494 void (*vlan_rx_add_vid)(struct net_device *dev,
495 unsigned short vid);
496 void (*vlan_rx_kill_vid)(struct net_device *dev,
497 unsigned short vid);
498
499 int (*hard_header_parse)(struct sk_buff *skb,
500 unsigned char *haddr);
501 int (*neigh_setup)(struct net_device *dev, struct neigh_parms *);
502 #ifdef CONFIG_NETPOLL
503 struct netpoll_info *npinfo;
504 #endif
505 #ifdef CONFIG_NET_POLL_CONTROLLER
506 void (*poll_controller)(struct net_device *dev);
507 #endif
508
509 /* bridge stuff */
510 struct net_bridge_port *br_port;
511
512 #ifdef CONFIG_NET_DIVERT
513 /* this will get initialized at each interface type init routine */
514 struct divert_blk *divert;
515 #endif /* CONFIG_NET_DIVERT */
516
517 /* class/net/name entry */
518 struct class_device class_dev;
519 /* space for optional statistics and wireless sysfs groups */
520 struct attribute_group *sysfs_groups[3];
521 };
522
523 #define NETDEV_ALIGN 32
524 #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
525
526 static inline void *netdev_priv(struct net_device *dev)
527 {
528 return (char *)dev + ((sizeof(struct net_device)
529 + NETDEV_ALIGN_CONST)
530 & ~NETDEV_ALIGN_CONST);
531 }
532
533 #define SET_MODULE_OWNER(dev) do { } while (0)
534 /* Set the sysfs physical device reference for the network logical device
535 * if set prior to registration will cause a symlink during initialization.
536 */
537 #define SET_NETDEV_DEV(net, pdev) ((net)->class_dev.dev = (pdev))
538
539 struct packet_type {
540 __be16 type; /* This is really htons(ether_type). */
541 struct net_device *dev; /* NULL is wildcarded here */
542 int (*func) (struct sk_buff *,
543 struct net_device *,
544 struct packet_type *,
545 struct net_device *);
546 struct sk_buff *(*gso_segment)(struct sk_buff *skb, int sg);
547 void *af_packet_priv;
548 struct list_head list;
549 };
550
551 #include <linux/interrupt.h>
552 #include <linux/notifier.h>
553
554 extern struct net_device loopback_dev; /* The loopback */
555 extern struct net_device *dev_base; /* All devices */
556 extern rwlock_t dev_base_lock; /* Device list lock */
557
558 extern int netdev_boot_setup_check(struct net_device *dev);
559 extern unsigned long netdev_boot_base(const char *prefix, int unit);
560 extern struct net_device *dev_getbyhwaddr(unsigned short type, char *hwaddr);
561 extern struct net_device *dev_getfirstbyhwtype(unsigned short type);
562 extern void dev_add_pack(struct packet_type *pt);
563 extern void dev_remove_pack(struct packet_type *pt);
564 extern void __dev_remove_pack(struct packet_type *pt);
565
566 extern struct net_device *dev_get_by_flags(unsigned short flags,
567 unsigned short mask);
568 extern struct net_device *dev_get_by_name(const char *name);
569 extern struct net_device *__dev_get_by_name(const char *name);
570 extern int dev_alloc_name(struct net_device *dev, const char *name);
571 extern int dev_open(struct net_device *dev);
572 extern int dev_close(struct net_device *dev);
573 extern int dev_queue_xmit(struct sk_buff *skb);
574 extern int register_netdevice(struct net_device *dev);
575 extern int unregister_netdevice(struct net_device *dev);
576 extern void free_netdev(struct net_device *dev);
577 extern void synchronize_net(void);
578 extern int register_netdevice_notifier(struct notifier_block *nb);
579 extern int unregister_netdevice_notifier(struct notifier_block *nb);
580 extern int call_netdevice_notifiers(unsigned long val, void *v);
581 extern struct net_device *dev_get_by_index(int ifindex);
582 extern struct net_device *__dev_get_by_index(int ifindex);
583 extern int dev_restart(struct net_device *dev);
584 #ifdef CONFIG_NETPOLL_TRAP
585 extern int netpoll_trap(void);
586 #endif
587
588 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
589 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
590 static inline int unregister_gifconf(unsigned int family)
591 {
592 return register_gifconf(family, NULL);
593 }
594
595 /*
596 * Incoming packets are placed on per-cpu queues so that
597 * no locking is needed.
598 */
599
600 struct softnet_data
601 {
602 struct net_device *output_queue;
603 struct sk_buff_head input_pkt_queue;
604 struct list_head poll_list;
605 struct sk_buff *completion_queue;
606
607 struct net_device backlog_dev; /* Sorry. 8) */
608 #ifdef CONFIG_NET_DMA
609 struct dma_chan *net_dma;
610 #endif
611 };
612
613 DECLARE_PER_CPU(struct softnet_data,softnet_data);
614
615 #define HAVE_NETIF_QUEUE
616
617 extern void __netif_schedule(struct net_device *dev);
618
619 static inline void netif_schedule(struct net_device *dev)
620 {
621 if (!test_bit(__LINK_STATE_XOFF, &dev->state))
622 __netif_schedule(dev);
623 }
624
625 static inline void netif_start_queue(struct net_device *dev)
626 {
627 clear_bit(__LINK_STATE_XOFF, &dev->state);
628 }
629
630 static inline void netif_wake_queue(struct net_device *dev)
631 {
632 #ifdef CONFIG_NETPOLL_TRAP
633 if (netpoll_trap())
634 return;
635 #endif
636 if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state))
637 __netif_schedule(dev);
638 }
639
640 static inline void netif_stop_queue(struct net_device *dev)
641 {
642 #ifdef CONFIG_NETPOLL_TRAP
643 if (netpoll_trap())
644 return;
645 #endif
646 set_bit(__LINK_STATE_XOFF, &dev->state);
647 }
648
649 static inline int netif_queue_stopped(const struct net_device *dev)
650 {
651 return test_bit(__LINK_STATE_XOFF, &dev->state);
652 }
653
654 static inline int netif_running(const struct net_device *dev)
655 {
656 return test_bit(__LINK_STATE_START, &dev->state);
657 }
658
659
660 /* Use this variant when it is known for sure that it
661 * is executing from interrupt context.
662 */
663 static inline void dev_kfree_skb_irq(struct sk_buff *skb)
664 {
665 if (atomic_dec_and_test(&skb->users)) {
666 struct softnet_data *sd;
667 unsigned long flags;
668
669 local_irq_save(flags);
670 sd = &__get_cpu_var(softnet_data);
671 skb->next = sd->completion_queue;
672 sd->completion_queue = skb;
673 raise_softirq_irqoff(NET_TX_SOFTIRQ);
674 local_irq_restore(flags);
675 }
676 }
677
678 /* Use this variant in places where it could be invoked
679 * either from interrupt or non-interrupt context.
680 */
681 extern void dev_kfree_skb_any(struct sk_buff *skb);
682
683 #define HAVE_NETIF_RX 1
684 extern int netif_rx(struct sk_buff *skb);
685 extern int netif_rx_ni(struct sk_buff *skb);
686 #define HAVE_NETIF_RECEIVE_SKB 1
687 extern int netif_receive_skb(struct sk_buff *skb);
688 extern int dev_valid_name(const char *name);
689 extern int dev_ioctl(unsigned int cmd, void __user *);
690 extern int dev_ethtool(struct ifreq *);
691 extern unsigned dev_get_flags(const struct net_device *);
692 extern int dev_change_flags(struct net_device *, unsigned);
693 extern int dev_change_name(struct net_device *, char *);
694 extern int dev_set_mtu(struct net_device *, int);
695 extern int dev_set_mac_address(struct net_device *,
696 struct sockaddr *);
697 extern int dev_hard_start_xmit(struct sk_buff *skb,
698 struct net_device *dev);
699
700 extern void dev_init(void);
701
702 extern int netdev_nit;
703 extern int netdev_budget;
704
705 /* Called by rtnetlink.c:rtnl_unlock() */
706 extern void netdev_run_todo(void);
707
708 static inline void dev_put(struct net_device *dev)
709 {
710 atomic_dec(&dev->refcnt);
711 }
712
713 static inline void dev_hold(struct net_device *dev)
714 {
715 atomic_inc(&dev->refcnt);
716 }
717
718 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
719 * and _off may be called from IRQ context, but it is caller
720 * who is responsible for serialization of these calls.
721 *
722 * The name carrier is inappropriate, these functions should really be
723 * called netif_lowerlayer_*() because they represent the state of any
724 * kind of lower layer not just hardware media.
725 */
726
727 extern void linkwatch_fire_event(struct net_device *dev);
728
729 static inline int netif_carrier_ok(const struct net_device *dev)
730 {
731 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
732 }
733
734 extern void __netdev_watchdog_up(struct net_device *dev);
735
736 extern void netif_carrier_on(struct net_device *dev);
737
738 extern void netif_carrier_off(struct net_device *dev);
739
740 static inline void netif_dormant_on(struct net_device *dev)
741 {
742 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
743 linkwatch_fire_event(dev);
744 }
745
746 static inline void netif_dormant_off(struct net_device *dev)
747 {
748 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
749 linkwatch_fire_event(dev);
750 }
751
752 static inline int netif_dormant(const struct net_device *dev)
753 {
754 return test_bit(__LINK_STATE_DORMANT, &dev->state);
755 }
756
757
758 static inline int netif_oper_up(const struct net_device *dev) {
759 return (dev->operstate == IF_OPER_UP ||
760 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
761 }
762
763 /* Hot-plugging. */
764 static inline int netif_device_present(struct net_device *dev)
765 {
766 return test_bit(__LINK_STATE_PRESENT, &dev->state);
767 }
768
769 extern void netif_device_detach(struct net_device *dev);
770
771 extern void netif_device_attach(struct net_device *dev);
772
773 /*
774 * Network interface message level settings
775 */
776 #define HAVE_NETIF_MSG 1
777
778 enum {
779 NETIF_MSG_DRV = 0x0001,
780 NETIF_MSG_PROBE = 0x0002,
781 NETIF_MSG_LINK = 0x0004,
782 NETIF_MSG_TIMER = 0x0008,
783 NETIF_MSG_IFDOWN = 0x0010,
784 NETIF_MSG_IFUP = 0x0020,
785 NETIF_MSG_RX_ERR = 0x0040,
786 NETIF_MSG_TX_ERR = 0x0080,
787 NETIF_MSG_TX_QUEUED = 0x0100,
788 NETIF_MSG_INTR = 0x0200,
789 NETIF_MSG_TX_DONE = 0x0400,
790 NETIF_MSG_RX_STATUS = 0x0800,
791 NETIF_MSG_PKTDATA = 0x1000,
792 NETIF_MSG_HW = 0x2000,
793 NETIF_MSG_WOL = 0x4000,
794 };
795
796 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
797 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
798 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
799 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
800 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
801 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
802 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
803 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
804 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
805 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
806 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
807 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
808 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
809 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
810 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
811
812 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
813 {
814 /* use default */
815 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
816 return default_msg_enable_bits;
817 if (debug_value == 0) /* no output */
818 return 0;
819 /* set low N bits */
820 return (1 << debug_value) - 1;
821 }
822
823 /* Test if receive needs to be scheduled */
824 static inline int __netif_rx_schedule_prep(struct net_device *dev)
825 {
826 return !test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state);
827 }
828
829 /* Test if receive needs to be scheduled but only if up */
830 static inline int netif_rx_schedule_prep(struct net_device *dev)
831 {
832 return netif_running(dev) && __netif_rx_schedule_prep(dev);
833 }
834
835 /* Add interface to tail of rx poll list. This assumes that _prep has
836 * already been called and returned 1.
837 */
838
839 extern void __netif_rx_schedule(struct net_device *dev);
840
841 /* Try to reschedule poll. Called by irq handler. */
842
843 static inline void netif_rx_schedule(struct net_device *dev)
844 {
845 if (netif_rx_schedule_prep(dev))
846 __netif_rx_schedule(dev);
847 }
848
849 /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete().
850 * Do not inline this?
851 */
852 static inline int netif_rx_reschedule(struct net_device *dev, int undo)
853 {
854 if (netif_rx_schedule_prep(dev)) {
855 unsigned long flags;
856
857 dev->quota += undo;
858
859 local_irq_save(flags);
860 list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
861 __raise_softirq_irqoff(NET_RX_SOFTIRQ);
862 local_irq_restore(flags);
863 return 1;
864 }
865 return 0;
866 }
867
868 /* Remove interface from poll list: it must be in the poll list
869 * on current cpu. This primitive is called by dev->poll(), when
870 * it completes the work. The device cannot be out of poll list at this
871 * moment, it is BUG().
872 */
873 static inline void netif_rx_complete(struct net_device *dev)
874 {
875 unsigned long flags;
876
877 local_irq_save(flags);
878 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
879 list_del(&dev->poll_list);
880 smp_mb__before_clear_bit();
881 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
882 local_irq_restore(flags);
883 }
884
885 static inline void netif_poll_disable(struct net_device *dev)
886 {
887 while (test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state))
888 /* No hurry. */
889 schedule_timeout_interruptible(1);
890 }
891
892 static inline void netif_poll_enable(struct net_device *dev)
893 {
894 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
895 }
896
897 /* same as netif_rx_complete, except that local_irq_save(flags)
898 * has already been issued
899 */
900 static inline void __netif_rx_complete(struct net_device *dev)
901 {
902 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
903 list_del(&dev->poll_list);
904 smp_mb__before_clear_bit();
905 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
906 }
907
908 static inline void netif_tx_lock(struct net_device *dev)
909 {
910 spin_lock(&dev->_xmit_lock);
911 dev->xmit_lock_owner = smp_processor_id();
912 }
913
914 static inline void netif_tx_lock_bh(struct net_device *dev)
915 {
916 spin_lock_bh(&dev->_xmit_lock);
917 dev->xmit_lock_owner = smp_processor_id();
918 }
919
920 static inline int netif_tx_trylock(struct net_device *dev)
921 {
922 int err = spin_trylock(&dev->_xmit_lock);
923 if (!err)
924 dev->xmit_lock_owner = smp_processor_id();
925 return err;
926 }
927
928 static inline void netif_tx_unlock(struct net_device *dev)
929 {
930 dev->xmit_lock_owner = -1;
931 spin_unlock(&dev->_xmit_lock);
932 }
933
934 static inline void netif_tx_unlock_bh(struct net_device *dev)
935 {
936 dev->xmit_lock_owner = -1;
937 spin_unlock_bh(&dev->_xmit_lock);
938 }
939
940 static inline void netif_tx_disable(struct net_device *dev)
941 {
942 netif_tx_lock_bh(dev);
943 netif_stop_queue(dev);
944 netif_tx_unlock_bh(dev);
945 }
946
947 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
948
949 extern void ether_setup(struct net_device *dev);
950
951 /* Support for loadable net-drivers */
952 extern struct net_device *alloc_netdev(int sizeof_priv, const char *name,
953 void (*setup)(struct net_device *));
954 extern int register_netdev(struct net_device *dev);
955 extern void unregister_netdev(struct net_device *dev);
956 /* Functions used for multicast support */
957 extern void dev_mc_upload(struct net_device *dev);
958 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
959 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
960 extern void dev_mc_discard(struct net_device *dev);
961 extern void dev_set_promiscuity(struct net_device *dev, int inc);
962 extern void dev_set_allmulti(struct net_device *dev, int inc);
963 extern void netdev_state_change(struct net_device *dev);
964 extern void netdev_features_change(struct net_device *dev);
965 /* Load a device via the kmod */
966 extern void dev_load(const char *name);
967 extern void dev_mcast_init(void);
968 extern int netdev_max_backlog;
969 extern int weight_p;
970 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
971 extern int skb_checksum_help(struct sk_buff *skb, int inward);
972 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int sg);
973 #ifdef CONFIG_BUG
974 extern void netdev_rx_csum_fault(struct net_device *dev);
975 #else
976 static inline void netdev_rx_csum_fault(struct net_device *dev)
977 {
978 }
979 #endif
980 /* rx skb timestamps */
981 extern void net_enable_timestamp(void);
982 extern void net_disable_timestamp(void);
983
984 #ifdef CONFIG_PROC_FS
985 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
986 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
987 extern void dev_seq_stop(struct seq_file *seq, void *v);
988 #endif
989
990 extern void linkwatch_run_queue(void);
991
992 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
993 {
994 int feature = skb_shinfo(skb)->gso_type << NETIF_F_GSO_SHIFT;
995 return skb_shinfo(skb)->gso_size &&
996 (dev->features & feature) != feature;
997 }
998
999 #endif /* __KERNEL__ */
1000
1001 #endif /* _LINUX_DEV_H */
x86 "subsystem" repository