?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
sky2: backout NAPI reschedule
[linux-2.6/mini2440.git] / include / linux / netdevice.h
bloba461b51d6076387386aee2284679ab4390d2c31f
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/config.h>
38 #include <linux/device.h>
39 #include <linux/percpu.h>
40
41 struct divert_blk;
42 struct vlan_group;
43 struct ethtool_ops;
44 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 };
236
237
238 /*
239 * This structure holds at boot time configured netdevice settings. They
240 * are then used in the device probing.
241 */
242 struct netdev_boot_setup {
243 char name[IFNAMSIZ];
244 struct ifmap map;
245 };
246 #define NETDEV_BOOT_SETUP_MAX 8
247
248 extern int __init netdev_boot_setup(char *str);
249
250 /*
251 * The DEVICE structure.
252 * Actually, this whole structure is a big mistake. It mixes I/O
253 * data with strictly "high-level" data, and it has to know about
254 * almost every data structure used in the INET module.
255 *
256 * FIXME: cleanup struct net_device such that network protocol info
257 * moves out.
258 */
259
260 struct net_device
261 {
262
263 /*
264 * This is the first field of the "visible" part of this structure
265 * (i.e. as seen by users in the "Space.c" file). It is the name
266 * the interface.
267 */
268 char name[IFNAMSIZ];
269 /* device name hash chain */
270 struct hlist_node name_hlist;
271
272 /*
273 * I/O specific fields
274 * FIXME: Merge these and struct ifmap into one
275 */
276 unsigned long mem_end; /* shared mem end */
277 unsigned long mem_start; /* shared mem start */
278 unsigned long base_addr; /* device I/O address */
279 unsigned int irq; /* device IRQ number */
280
281 /*
282 * Some hardware also needs these fields, but they are not
283 * part of the usual set specified in Space.c.
284 */
285
286 unsigned char if_port; /* Selectable AUI, TP,..*/
287 unsigned char dma; /* DMA channel */
288
289 unsigned long state;
290
291 struct net_device *next;
292
293 /* The device initialization function. Called only once. */
294 int (*init)(struct net_device *dev);
295
296 /* ------- Fields preinitialized in Space.c finish here ------- */
297
298 /* Net device features */
299 unsigned long features;
300 #define NETIF_F_SG 1 /* Scatter/gather IO. */
301 #define NETIF_F_IP_CSUM 2 /* Can checksum only TCP/UDP over IPv4. */
302 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
303 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
304 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
305 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
306 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
307 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
308 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
309 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
310 #define NETIF_F_TSO 2048 /* Can offload TCP/IP segmentation */
311 #define NETIF_F_LLTX 4096 /* LockLess TX */
312 #define NETIF_F_UFO 8192 /* Can offload UDP Large Send*/
313
314 struct net_device *next_sched;
315
316 /* Interface index. Unique device identifier */
317 int ifindex;
318 int iflink;
319
320
321 struct net_device_stats* (*get_stats)(struct net_device *dev);
322 struct iw_statistics* (*get_wireless_stats)(struct net_device *dev);
323
324 /* List of functions to handle Wireless Extensions (instead of ioctl).
325 * See <net/iw_handler.h> for details. Jean II */
326 const struct iw_handler_def * wireless_handlers;
327 /* Instance data managed by the core of Wireless Extensions. */
328 struct iw_public_data * wireless_data;
329
330 struct ethtool_ops *ethtool_ops;
331
332 /*
333 * This marks the end of the "visible" part of the structure. All
334 * fields hereafter are internal to the system, and may change at
335 * will (read: may be cleaned up at will).
336 */
337
338
339 unsigned int flags; /* interface flags (a la BSD) */
340 unsigned short gflags;
341 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
342 unsigned short padded; /* How much padding added by alloc_netdev() */
343
344 unsigned char operstate; /* RFC2863 operstate */
345 unsigned char link_mode; /* mapping policy to operstate */
346
347 unsigned mtu; /* interface MTU value */
348 unsigned short type; /* interface hardware type */
349 unsigned short hard_header_len; /* hardware hdr length */
350
351 struct net_device *master; /* Pointer to master device of a group,
352 * which this device is member of.
353 */
354
355 /* Interface address info. */
356 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
357 unsigned char addr_len; /* hardware address length */
358 unsigned short dev_id; /* for shared network cards */
359
360 struct dev_mc_list *mc_list; /* Multicast mac addresses */
361 int mc_count; /* Number of installed mcasts */
362 int promiscuity;
363 int allmulti;
364
365
366 /* Protocol specific pointers */
367
368 void *atalk_ptr; /* AppleTalk link */
369 void *ip_ptr; /* IPv4 specific data */
370 void *dn_ptr; /* DECnet specific data */
371 void *ip6_ptr; /* IPv6 specific data */
372 void *ec_ptr; /* Econet specific data */
373 void *ax25_ptr; /* AX.25 specific data */
374
375 /*
376 * Cache line mostly used on receive path (including eth_type_trans())
377 */
378 struct list_head poll_list ____cacheline_aligned_in_smp;
379 /* Link to poll list */
380
381 int (*poll) (struct net_device *dev, int *quota);
382 int quota;
383 int weight;
384 unsigned long last_rx; /* Time of last Rx */
385 /* Interface address info used in eth_type_trans() */
386 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
387 because most packets are unicast) */
388
389 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
390
391 /*
392 * Cache line mostly used on queue transmit path (qdisc)
393 */
394 /* device queue lock */
395 spinlock_t queue_lock ____cacheline_aligned_in_smp;
396 struct Qdisc *qdisc;
397 struct Qdisc *qdisc_sleeping;
398 struct list_head qdisc_list;
399 unsigned long tx_queue_len; /* Max frames per queue allowed */
400
401 /* ingress path synchronizer */
402 spinlock_t ingress_lock;
403 struct Qdisc *qdisc_ingress;
404
405 /*
406 * One part is mostly used on xmit path (device)
407 */
408 /* hard_start_xmit synchronizer */
409 spinlock_t xmit_lock ____cacheline_aligned_in_smp;
410 /* cpu id of processor entered to hard_start_xmit or -1,
411 if nobody entered there.
412 */
413 int xmit_lock_owner;
414 void *priv; /* pointer to private data */
415 int (*hard_start_xmit) (struct sk_buff *skb,
416 struct net_device *dev);
417 /* These may be needed for future network-power-down code. */
418 unsigned long trans_start; /* Time (in jiffies) of last Tx */
419
420 int watchdog_timeo; /* used by dev_watchdog() */
421 struct timer_list watchdog_timer;
422
423 /*
424 * refcnt is a very hot point, so align it on SMP
425 */
426 /* Number of references to this device */
427 atomic_t refcnt ____cacheline_aligned_in_smp;
428
429 /* delayed register/unregister */
430 struct list_head todo_list;
431 /* device index hash chain */
432 struct hlist_node index_hlist;
433
434 /* register/unregister state machine */
435 enum { NETREG_UNINITIALIZED=0,
436 NETREG_REGISTERING, /* called register_netdevice */
437 NETREG_REGISTERED, /* completed register todo */
438 NETREG_UNREGISTERING, /* called unregister_netdevice */
439 NETREG_UNREGISTERED, /* completed unregister todo */
440 NETREG_RELEASED, /* called free_netdev */
441 } reg_state;
442
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);
451 #define HAVE_NETDEV_POLL
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
493 struct netpoll_info *npinfo;
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;
509 /* space for optional statistics and wireless sysfs groups */
510 struct attribute_group *sysfs_groups[3];
511 };
512
513 #define NETDEV_ALIGN 32
514 #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
515
516 static 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
529 struct packet_type {
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 *);
536 void *af_packet_priv;
537 struct list_head list;
538 };
539
540 #include <linux/interrupt.h>
541 #include <linux/notifier.h>
542
543 extern struct net_device loopback_dev; /* The loopback */
544 extern struct net_device *dev_base; /* All devices */
545 extern rwlock_t dev_base_lock; /* Device list lock */
546
547 extern int netdev_boot_setup_check(struct net_device *dev);
548 extern unsigned long netdev_boot_base(const char *prefix, int unit);
549 extern struct net_device *dev_getbyhwaddr(unsigned short type, char *hwaddr);
550 extern struct net_device *dev_getfirstbyhwtype(unsigned short type);
551 extern void dev_add_pack(struct packet_type *pt);
552 extern void dev_remove_pack(struct packet_type *pt);
553 extern void __dev_remove_pack(struct packet_type *pt);
554
555 extern struct net_device *dev_get_by_flags(unsigned short flags,
556 unsigned short mask);
557 extern struct net_device *dev_get_by_name(const char *name);
558 extern struct net_device *__dev_get_by_name(const char *name);
559 extern int dev_alloc_name(struct net_device *dev, const char *name);
560 extern int dev_open(struct net_device *dev);
561 extern int dev_close(struct net_device *dev);
562 extern int dev_queue_xmit(struct sk_buff *skb);
563 extern int register_netdevice(struct net_device *dev);
564 extern int unregister_netdevice(struct net_device *dev);
565 extern void free_netdev(struct net_device *dev);
566 extern void synchronize_net(void);
567 extern int register_netdevice_notifier(struct notifier_block *nb);
568 extern int unregister_netdevice_notifier(struct notifier_block *nb);
569 extern int call_netdevice_notifiers(unsigned long val, void *v);
570 extern struct net_device *dev_get_by_index(int ifindex);
571 extern struct net_device *__dev_get_by_index(int ifindex);
572 extern int dev_restart(struct net_device *dev);
573 #ifdef CONFIG_NETPOLL_TRAP
574 extern int netpoll_trap(void);
575 #endif
576
577 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
578 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
579 static 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
589 struct softnet_data
590 {
591 struct net_device *output_queue;
592 struct sk_buff_head input_pkt_queue;
593 struct list_head poll_list;
594 struct sk_buff *completion_queue;
595
596 struct net_device backlog_dev; /* Sorry. 8) */
597 };
598
599 DECLARE_PER_CPU(struct softnet_data,softnet_data);
600
601 #define HAVE_NETIF_QUEUE
602
603 extern void __netif_schedule(struct net_device *dev);
604
605 static inline void netif_schedule(struct net_device *dev)
606 {
607 if (!test_bit(__LINK_STATE_XOFF, &dev->state))
608 __netif_schedule(dev);
609 }
610
611 static inline void netif_start_queue(struct net_device *dev)
612 {
613 clear_bit(__LINK_STATE_XOFF, &dev->state);
614 }
615
616 static inline void netif_wake_queue(struct net_device *dev)
617 {
618 #ifdef CONFIG_NETPOLL_TRAP
619 if (netpoll_trap())
620 return;
621 #endif
622 if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state))
623 __netif_schedule(dev);
624 }
625
626 static inline void netif_stop_queue(struct net_device *dev)
627 {
628 #ifdef CONFIG_NETPOLL_TRAP
629 if (netpoll_trap())
630 return;
631 #endif
632 set_bit(__LINK_STATE_XOFF, &dev->state);
633 }
634
635 static inline int netif_queue_stopped(const struct net_device *dev)
636 {
637 return test_bit(__LINK_STATE_XOFF, &dev->state);
638 }
639
640 static inline int netif_running(const struct net_device *dev)
641 {
642 return test_bit(__LINK_STATE_START, &dev->state);
643 }
644
645
646 /* Use this variant when it is known for sure that it
647 * is executing from interrupt context.
648 */
649 static inline void dev_kfree_skb_irq(struct sk_buff *skb)
650 {
651 if (atomic_dec_and_test(&skb->users)) {
652 struct softnet_data *sd;
653 unsigned long flags;
654
655 local_irq_save(flags);
656 sd = &__get_cpu_var(softnet_data);
657 skb->next = sd->completion_queue;
658 sd->completion_queue = skb;
659 raise_softirq_irqoff(NET_TX_SOFTIRQ);
660 local_irq_restore(flags);
661 }
662 }
663
664 /* Use this variant in places where it could be invoked
665 * either from interrupt or non-interrupt context.
666 */
667 extern void dev_kfree_skb_any(struct sk_buff *skb);
668
669 #define HAVE_NETIF_RX 1
670 extern int netif_rx(struct sk_buff *skb);
671 extern int netif_rx_ni(struct sk_buff *skb);
672 #define HAVE_NETIF_RECEIVE_SKB 1
673 extern int netif_receive_skb(struct sk_buff *skb);
674 extern int dev_valid_name(const char *name);
675 extern int dev_ioctl(unsigned int cmd, void __user *);
676 extern int dev_ethtool(struct ifreq *);
677 extern unsigned dev_get_flags(const struct net_device *);
678 extern int dev_change_flags(struct net_device *, unsigned);
679 extern int dev_change_name(struct net_device *, char *);
680 extern int dev_set_mtu(struct net_device *, int);
681 extern int dev_set_mac_address(struct net_device *,
682 struct sockaddr *);
683 extern void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev);
684
685 extern void dev_init(void);
686
687 extern int netdev_nit;
688 extern int netdev_budget;
689
690 /* Called by rtnetlink.c:rtnl_unlock() */
691 extern void netdev_run_todo(void);
692
693 static inline void dev_put(struct net_device *dev)
694 {
695 atomic_dec(&dev->refcnt);
696 }
697
698 static inline void dev_hold(struct net_device *dev)
699 {
700 atomic_inc(&dev->refcnt);
701 }
702
703 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
704 * and _off may be called from IRQ context, but it is caller
705 * who is responsible for serialization of these calls.
706 *
707 * The name carrier is inappropriate, these functions should really be
708 * called netif_lowerlayer_*() because they represent the state of any
709 * kind of lower layer not just hardware media.
710 */
711
712 extern void linkwatch_fire_event(struct net_device *dev);
713
714 static inline int netif_carrier_ok(const struct net_device *dev)
715 {
716 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
717 }
718
719 extern void __netdev_watchdog_up(struct net_device *dev);
720
721 extern void netif_carrier_on(struct net_device *dev);
722
723 extern void netif_carrier_off(struct net_device *dev);
724
725 static inline void netif_dormant_on(struct net_device *dev)
726 {
727 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
728 linkwatch_fire_event(dev);
729 }
730
731 static inline void netif_dormant_off(struct net_device *dev)
732 {
733 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
734 linkwatch_fire_event(dev);
735 }
736
737 static inline int netif_dormant(const struct net_device *dev)
738 {
739 return test_bit(__LINK_STATE_DORMANT, &dev->state);
740 }
741
742
743 static inline int netif_oper_up(const struct net_device *dev) {
744 return (dev->operstate == IF_OPER_UP ||
745 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
746 }
747
748 /* Hot-plugging. */
749 static inline int netif_device_present(struct net_device *dev)
750 {
751 return test_bit(__LINK_STATE_PRESENT, &dev->state);
752 }
753
754 extern void netif_device_detach(struct net_device *dev);
755
756 extern void netif_device_attach(struct net_device *dev);
757
758 /*
759 * Network interface message level settings
760 */
761 #define HAVE_NETIF_MSG 1
762
763 enum {
764 NETIF_MSG_DRV = 0x0001,
765 NETIF_MSG_PROBE = 0x0002,
766 NETIF_MSG_LINK = 0x0004,
767 NETIF_MSG_TIMER = 0x0008,
768 NETIF_MSG_IFDOWN = 0x0010,
769 NETIF_MSG_IFUP = 0x0020,
770 NETIF_MSG_RX_ERR = 0x0040,
771 NETIF_MSG_TX_ERR = 0x0080,
772 NETIF_MSG_TX_QUEUED = 0x0100,
773 NETIF_MSG_INTR = 0x0200,
774 NETIF_MSG_TX_DONE = 0x0400,
775 NETIF_MSG_RX_STATUS = 0x0800,
776 NETIF_MSG_PKTDATA = 0x1000,
777 NETIF_MSG_HW = 0x2000,
778 NETIF_MSG_WOL = 0x4000,
779 };
780
781 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
782 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
783 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
784 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
785 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
786 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
787 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
788 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
789 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
790 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
791 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
792 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
793 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
794 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
795 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
796
797 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
798 {
799 /* use default */
800 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
801 return default_msg_enable_bits;
802 if (debug_value == 0) /* no output */
803 return 0;
804 /* set low N bits */
805 return (1 << debug_value) - 1;
806 }
807
808 /* Test if receive needs to be scheduled */
809 static inline int __netif_rx_schedule_prep(struct net_device *dev)
810 {
811 return !test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state);
812 }
813
814 /* Test if receive needs to be scheduled but only if up */
815 static inline int netif_rx_schedule_prep(struct net_device *dev)
816 {
817 return netif_running(dev) && __netif_rx_schedule_prep(dev);
818 }
819
820 /* Add interface to tail of rx poll list. This assumes that _prep has
821 * already been called and returned 1.
822 */
823
824 extern void __netif_rx_schedule(struct net_device *dev);
825
826 /* Try to reschedule poll. Called by irq handler. */
827
828 static inline void netif_rx_schedule(struct net_device *dev)
829 {
830 if (netif_rx_schedule_prep(dev))
831 __netif_rx_schedule(dev);
832 }
833
834 /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete().
835 * Do not inline this?
836 */
837 static inline int netif_rx_reschedule(struct net_device *dev, int undo)
838 {
839 if (netif_rx_schedule_prep(dev)) {
840 unsigned long flags;
841
842 dev->quota += undo;
843
844 local_irq_save(flags);
845 list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
846 __raise_softirq_irqoff(NET_RX_SOFTIRQ);
847 local_irq_restore(flags);
848 return 1;
849 }
850 return 0;
851 }
852
853 /* Remove interface from poll list: it must be in the poll list
854 * on current cpu. This primitive is called by dev->poll(), when
855 * it completes the work. The device cannot be out of poll list at this
856 * moment, it is BUG().
857 */
858 static inline void netif_rx_complete(struct net_device *dev)
859 {
860 unsigned long flags;
861
862 local_irq_save(flags);
863 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
864 list_del(&dev->poll_list);
865 smp_mb__before_clear_bit();
866 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
867 local_irq_restore(flags);
868 }
869
870 static inline void netif_poll_disable(struct net_device *dev)
871 {
872 while (test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state))
873 /* No hurry. */
874 schedule_timeout_interruptible(1);
875 }
876
877 static inline void netif_poll_enable(struct net_device *dev)
878 {
879 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
880 }
881
882 /* same as netif_rx_complete, except that local_irq_save(flags)
883 * has already been issued
884 */
885 static inline void __netif_rx_complete(struct net_device *dev)
886 {
887 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
888 list_del(&dev->poll_list);
889 smp_mb__before_clear_bit();
890 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
891 }
892
893 static inline void netif_tx_disable(struct net_device *dev)
894 {
895 spin_lock_bh(&dev->xmit_lock);
896 netif_stop_queue(dev);
897 spin_unlock_bh(&dev->xmit_lock);
898 }
899
900 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
901
902 extern void ether_setup(struct net_device *dev);
903
904 /* Support for loadable net-drivers */
905 extern struct net_device *alloc_netdev(int sizeof_priv, const char *name,
906 void (*setup)(struct net_device *));
907 extern int register_netdev(struct net_device *dev);
908 extern void unregister_netdev(struct net_device *dev);
909 /* Functions used for multicast support */
910 extern void dev_mc_upload(struct net_device *dev);
911 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
912 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
913 extern void dev_mc_discard(struct net_device *dev);
914 extern void dev_set_promiscuity(struct net_device *dev, int inc);
915 extern void dev_set_allmulti(struct net_device *dev, int inc);
916 extern void netdev_state_change(struct net_device *dev);
917 extern void netdev_features_change(struct net_device *dev);
918 /* Load a device via the kmod */
919 extern void dev_load(const char *name);
920 extern void dev_mcast_init(void);
921 extern int netdev_max_backlog;
922 extern int weight_p;
923 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
924 extern int skb_checksum_help(struct sk_buff *skb, int inward);
925 #ifdef CONFIG_BUG
926 extern void netdev_rx_csum_fault(struct net_device *dev);
927 #else
928 static inline void netdev_rx_csum_fault(struct net_device *dev)
929 {
930 }
931 #endif
932 /* rx skb timestamps */
933 extern void net_enable_timestamp(void);
934 extern void net_disable_timestamp(void);
935
936 #ifdef CONFIG_PROC_FS
937 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
938 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
939 extern void dev_seq_stop(struct seq_file *seq, void *v);
940 #endif
941
942 extern void linkwatch_run_queue(void);
943
944 #endif /* __KERNEL__ */
945
946 #endif /* _LINUX_DEV_H */
Support for the Chinese Samsung S3C2440 based development boards