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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
1da177e4
LT		 37#include <linux/device.h>
38#include <linux/percpu.h>
db217334 39#include <linux/dmaengine.h>
1da177e4
LT		 40
41struct divert_blk;
42struct vlan_group;
43struct ethtool_ops;
115c1d6e 44struct netpoll_info;
1da177e4
LT		 45 /* source back-compat hooks */
46#define SET_ETHTOOL_OPS(netdev,ops) \
47 ( (netdev)->ethtool_ops = (ops) )
48
49#define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
50 functions are available. */
51#define HAVE_FREE_NETDEV /* free_netdev() */
52#define HAVE_NETDEV_PRIV /* netdev_priv() */
53
54#define NET_XMIT_SUCCESS 0
55#define NET_XMIT_DROP 1 /* skb dropped */
56#define NET_XMIT_CN 2 /* congestion notification */
57#define NET_XMIT_POLICED 3 /* skb is shot by police */
58#define NET_XMIT_BYPASS 4 /* packet does not leave via dequeue;
59 (TC use only - dev_queue_xmit
60 returns this as NET_XMIT_SUCCESS) */
61
62/* Backlog congestion levels */
63#define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
64#define NET_RX_DROP 1 /* packet dropped */
65#define NET_RX_CN_LOW 2 /* storm alert, just in case */
66#define NET_RX_CN_MOD 3 /* Storm on its way! */
67#define NET_RX_CN_HIGH 4 /* The storm is here */
68#define NET_RX_BAD 5 /* packet dropped due to kernel error */
69
70#define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
71
72#endif
73
74#define MAX_ADDR_LEN 32 /* Largest hardware address length */
75
76/* Driver transmit return codes */
77#define NETDEV_TX_OK 0 /* driver took care of packet */
78#define NETDEV_TX_BUSY 1 /* driver tx path was busy*/
79#define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */
80
81/*
82 * Compute the worst case header length according to the protocols
83 * used.
84 */
85
86#if !defined(CONFIG_AX25) && !defined(CONFIG_AX25_MODULE) && !defined(CONFIG_TR)
87#define LL_MAX_HEADER 32
88#else
89#if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
90#define LL_MAX_HEADER 96
91#else
92#define LL_MAX_HEADER 48
93#endif
94#endif
95
96#if !defined(CONFIG_NET_IPIP) && \
97 !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE)
98#define MAX_HEADER LL_MAX_HEADER
99#else
100#define MAX_HEADER (LL_MAX_HEADER + 48)
101#endif
102
103/*
104 * Network device statistics. Akin to the 2.0 ether stats but
105 * with byte counters.
106 */
107
108struct net_device_stats
109{
110 unsigned long rx_packets; /* total packets received */
111 unsigned long tx_packets; /* total packets transmitted */
112 unsigned long rx_bytes; /* total bytes received */
113 unsigned long tx_bytes; /* total bytes transmitted */
114 unsigned long rx_errors; /* bad packets received */
115 unsigned long tx_errors; /* packet transmit problems */
116 unsigned long rx_dropped; /* no space in linux buffers */
117 unsigned long tx_dropped; /* no space available in linux */
118 unsigned long multicast; /* multicast packets received */
119 unsigned long collisions;
120
121 /* detailed rx_errors: */
122 unsigned long rx_length_errors;
123 unsigned long rx_over_errors; /* receiver ring buff overflow */
124 unsigned long rx_crc_errors; /* recved pkt with crc error */
125 unsigned long rx_frame_errors; /* recv'd frame alignment error */
126 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
127 unsigned long rx_missed_errors; /* receiver missed packet */
128
129 /* detailed tx_errors */
130 unsigned long tx_aborted_errors;
131 unsigned long tx_carrier_errors;
132 unsigned long tx_fifo_errors;
133 unsigned long tx_heartbeat_errors;
134 unsigned long tx_window_errors;
135
136 /* for cslip etc */
137 unsigned long rx_compressed;
138 unsigned long tx_compressed;
139};
140
141
142/* Media selection options. */
143enum {
144 IF_PORT_UNKNOWN = 0,
145 IF_PORT_10BASE2,
146 IF_PORT_10BASET,
147 IF_PORT_AUI,
148 IF_PORT_100BASET,
149 IF_PORT_100BASETX,
150 IF_PORT_100BASEFX
151};
152
153#ifdef __KERNEL__
154
155#include <linux/cache.h>
156#include <linux/skbuff.h>
157
158struct neighbour;
159struct neigh_parms;
160struct sk_buff;
161
162struct netif_rx_stats
163{
164 unsigned total;
165 unsigned dropped;
166 unsigned time_squeeze;
1da177e4
LT		 167 unsigned cpu_collision;
168};
169
170DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
171
172
173/*
174 * We tag multicasts with these structures.
175 */
176
177struct dev_mc_list
178{
179 struct dev_mc_list *next;
180 __u8 dmi_addr[MAX_ADDR_LEN];
181 unsigned char dmi_addrlen;
182 int dmi_users;
183 int dmi_gusers;
184};
185
186struct hh_cache
187{
188 struct hh_cache *hh_next; /* Next entry */
189 atomic_t hh_refcnt; /* number of users */
190 unsigned short hh_type; /* protocol identifier, f.e ETH_P_IP
191 * NOTE: For VLANs, this will be the
192 * encapuslated type. --BLG
193 */
194 int hh_len; /* length of header */
195 int (*hh_output)(struct sk_buff *skb);
196 rwlock_t hh_lock;
197
198 /* cached hardware header; allow for machine alignment needs. */
199#define HH_DATA_MOD 16
200#define HH_DATA_OFF(__len) \
5ba0eac6 201 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
1da177e4
LT		 202#define HH_DATA_ALIGN(__len) \
203 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
204 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
205};
206
207/* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
208 * Alternative is:
209 * dev->hard_header_len ? (dev->hard_header_len +
210 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
211 *
212 * We could use other alignment values, but we must maintain the
213 * relationship HH alignment <= LL alignment.
214 */
215#define LL_RESERVED_SPACE(dev) \
216 (((dev)->hard_header_len&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
217#define LL_RESERVED_SPACE_EXTRA(dev,extra) \
218 ((((dev)->hard_header_len+extra)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
219
220/* These flag bits are private to the generic network queueing
221 * layer, they may not be explicitly referenced by any other
222 * code.
223 */
224
225enum netdev_state_t
226{
227 __LINK_STATE_XOFF=0,
228 __LINK_STATE_START,
229 __LINK_STATE_PRESENT,
230 __LINK_STATE_SCHED,
231 __LINK_STATE_NOCARRIER,
232 __LINK_STATE_RX_SCHED,
b00055aa
SR		 233 __LINK_STATE_LINKWATCH_PENDING,
234 __LINK_STATE_DORMANT,
48d83325 235 __LINK_STATE_QDISC_RUNNING,
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 */
9356b8fc 311#define NETIF_F_LLTX 4096 /* LockLess TX */
7967168c
HX		 312
313 /* Segmentation offload features */
314#define NETIF_F_GSO_SHIFT 16
315#define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
316#define NETIF_F_UFO (SKB_GSO_UDPV4 << NETIF_F_GSO_SHIFT)
9356b8fc 317
8648b305
HX		 318#define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
319#define NETIF_F_ALL_CSUM (NETIF_F_IP_CSUM | NETIF_F_GEN_CSUM)
320
1da177e4
LT		 321 struct net_device *next_sched;
322
323 /* Interface index. Unique device identifier */
324 int ifindex;
325 int iflink;
326
327
328 struct net_device_stats* (*get_stats)(struct net_device *dev);
329 struct iw_statistics* (*get_wireless_stats)(struct net_device *dev);
330
331 /* List of functions to handle Wireless Extensions (instead of ioctl).
332 * See <net/iw_handler.h> for details. Jean II */
333 const struct iw_handler_def * wireless_handlers;
334 /* Instance data managed by the core of Wireless Extensions. */
335 struct iw_public_data * wireless_data;
336
337 struct ethtool_ops *ethtool_ops;
338
339 /*
340 * This marks the end of the "visible" part of the structure. All
341 * fields hereafter are internal to the system, and may change at
342 * will (read: may be cleaned up at will).
343 */
344
1da177e4 345
b00055aa 346 unsigned int flags; /* interface flags (a la BSD) */
1da177e4
LT		 347 unsigned short gflags;
348 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
349 unsigned short padded; /* How much padding added by alloc_netdev() */
350
b00055aa
SR		 351 unsigned char operstate; /* RFC2863 operstate */
352 unsigned char link_mode; /* mapping policy to operstate */
353
1da177e4
LT		 354 unsigned mtu; /* interface MTU value */
355 unsigned short type; /* interface hardware type */
356 unsigned short hard_header_len; /* hardware hdr length */
1da177e4
LT		 357
358 struct net_device *master; /* Pointer to master device of a group,
359 * which this device is member of.
360 */
361
362 /* Interface address info. */
a6f9a705 363 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
1da177e4
LT		 364 unsigned char addr_len; /* hardware address length */
365 unsigned short dev_id; /* for shared network cards */
366
367 struct dev_mc_list *mc_list; /* Multicast mac addresses */
368 int mc_count; /* Number of installed mcasts */
369 int promiscuity;
370 int allmulti;
371
1da177e4
LT		 372
373 /* Protocol specific pointers */
374
375 void *atalk_ptr; /* AppleTalk link */
376 void *ip_ptr; /* IPv4 specific data */
377 void *dn_ptr; /* DECnet specific data */
378 void *ip6_ptr; /* IPv6 specific data */
379 void *ec_ptr; /* Econet specific data */
380 void *ax25_ptr; /* AX.25 specific data */
381
9356b8fc
ED		 382/*
383 * Cache line mostly used on receive path (including eth_type_trans())
384 */
385 struct list_head poll_list ____cacheline_aligned_in_smp;
386 /* Link to poll list */
387
388 int (*poll) (struct net_device *dev, int *quota);
1da177e4
LT		 389 int quota;
390 int weight;
9356b8fc
ED		 391 unsigned long last_rx; /* Time of last Rx */
392 /* Interface address info used in eth_type_trans() */
393 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
394 because most packets are unicast) */
395
396 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
1da177e4 397
9356b8fc
ED		 398/*
399 * Cache line mostly used on queue transmit path (qdisc)
400 */
401 /* device queue lock */
402 spinlock_t queue_lock ____cacheline_aligned_in_smp;
1da177e4
LT		 403 struct Qdisc *qdisc;
404 struct Qdisc *qdisc_sleeping;
1da177e4
LT		 405 struct list_head qdisc_list;
406 unsigned long tx_queue_len; /* Max frames per queue allowed */
407
f6a78bfc
HX		 408 /* Partially transmitted GSO packet. */
409 struct sk_buff *gso_skb;
410
1da177e4
LT		 411 /* ingress path synchronizer */
412 spinlock_t ingress_lock;
9356b8fc
ED		 413 struct Qdisc *qdisc_ingress;
414
415/*
416 * One part is mostly used on xmit path (device)
417 */
1da177e4 418 /* hard_start_xmit synchronizer */
932ff279 419 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
1da177e4
LT		 420 /* cpu id of processor entered to hard_start_xmit or -1,
421 if nobody entered there.
422 */
423 int xmit_lock_owner;
9356b8fc
ED		 424 void *priv; /* pointer to private data */
425 int (*hard_start_xmit) (struct sk_buff *skb,
426 struct net_device *dev);
427 /* These may be needed for future network-power-down code. */
428 unsigned long trans_start; /* Time (in jiffies) of last Tx */
429
430 int watchdog_timeo; /* used by dev_watchdog() */
431 struct timer_list watchdog_timer;
432
433/*
434 * refcnt is a very hot point, so align it on SMP
435 */
1da177e4 436 /* Number of references to this device */
9356b8fc
ED		 437 atomic_t refcnt ____cacheline_aligned_in_smp;
438
1da177e4
LT		 439 /* delayed register/unregister */
440 struct list_head todo_list;
1da177e4
LT		 441 /* device index hash chain */
442 struct hlist_node index_hlist;
443
444 /* register/unregister state machine */
445 enum { NETREG_UNINITIALIZED=0,
b17a7c17 446 NETREG_REGISTERED, /* completed register_netdevice */
1da177e4
LT		 447 NETREG_UNREGISTERING, /* called unregister_netdevice */
448 NETREG_UNREGISTERED, /* completed unregister todo */
449 NETREG_RELEASED, /* called free_netdev */
450 } reg_state;
451
1da177e4
LT		 452 /* Called after device is detached from network. */
453 void (*uninit)(struct net_device *dev);
454 /* Called after last user reference disappears. */
455 void (*destructor)(struct net_device *dev);
456
457 /* Pointers to interface service routines. */
458 int (*open)(struct net_device *dev);
459 int (*stop)(struct net_device *dev);
1da177e4 460#define HAVE_NETDEV_POLL
1da177e4
LT		 461 int (*hard_header) (struct sk_buff *skb,
462 struct net_device *dev,
463 unsigned short type,
464 void *daddr,
465 void *saddr,
466 unsigned len);
467 int (*rebuild_header)(struct sk_buff *skb);
468#define HAVE_MULTICAST
469 void (*set_multicast_list)(struct net_device *dev);
470#define HAVE_SET_MAC_ADDR
471 int (*set_mac_address)(struct net_device *dev,
472 void *addr);
473#define HAVE_PRIVATE_IOCTL
474 int (*do_ioctl)(struct net_device *dev,
475 struct ifreq *ifr, int cmd);
476#define HAVE_SET_CONFIG
477 int (*set_config)(struct net_device *dev,
478 struct ifmap *map);
479#define HAVE_HEADER_CACHE
480 int (*hard_header_cache)(struct neighbour *neigh,
481 struct hh_cache *hh);
482 void (*header_cache_update)(struct hh_cache *hh,
483 struct net_device *dev,
484 unsigned char * haddr);
485#define HAVE_CHANGE_MTU
486 int (*change_mtu)(struct net_device *dev, int new_mtu);
487
488#define HAVE_TX_TIMEOUT
489 void (*tx_timeout) (struct net_device *dev);
490
491 void (*vlan_rx_register)(struct net_device *dev,
492 struct vlan_group *grp);
493 void (*vlan_rx_add_vid)(struct net_device *dev,
494 unsigned short vid);
495 void (*vlan_rx_kill_vid)(struct net_device *dev,
496 unsigned short vid);
497
498 int (*hard_header_parse)(struct sk_buff *skb,
499 unsigned char *haddr);
500 int (*neigh_setup)(struct net_device *dev, struct neigh_parms *);
501#ifdef CONFIG_NETPOLL
115c1d6e 502 struct netpoll_info *npinfo;
1da177e4
LT		 503#endif
504#ifdef CONFIG_NET_POLL_CONTROLLER
505 void (*poll_controller)(struct net_device *dev);
506#endif
507
508 /* bridge stuff */
509 struct net_bridge_port *br_port;
510
511#ifdef CONFIG_NET_DIVERT
512 /* this will get initialized at each interface type init routine */
513 struct divert_blk *divert;
514#endif /* CONFIG_NET_DIVERT */
515
516 /* class/net/name entry */
517 struct class_device class_dev;
fe9925b5
SH		 518 /* space for optional statistics and wireless sysfs groups */
519 struct attribute_group *sysfs_groups[3];
1da177e4
LT		 520};
521
522#define NETDEV_ALIGN 32
523#define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
524
525static inline void *netdev_priv(struct net_device *dev)
526{
527 return (char *)dev + ((sizeof(struct net_device)
528 + NETDEV_ALIGN_CONST)
529 & ~NETDEV_ALIGN_CONST);
530}
531
532#define SET_MODULE_OWNER(dev) do { } while (0)
533/* Set the sysfs physical device reference for the network logical device
534 * if set prior to registration will cause a symlink during initialization.
535 */
536#define SET_NETDEV_DEV(net, pdev) ((net)->class_dev.dev = (pdev))
537
538struct packet_type {
f2ccd8fa
DM		 539 __be16 type; /* This is really htons(ether_type). */
540 struct net_device *dev; /* NULL is wildcarded here */
541 int (*func) (struct sk_buff *,
542 struct net_device *,
543 struct packet_type *,
544 struct net_device *);
f6a78bfc 545 struct sk_buff *(*gso_segment)(struct sk_buff *skb, int sg);
1da177e4
LT		 546 void *af_packet_priv;
547 struct list_head list;
548};
549
550#include <linux/interrupt.h>
551#include <linux/notifier.h>
552
553extern struct net_device loopback_dev; /* The loopback */
554extern struct net_device *dev_base; /* All devices */
555extern rwlock_t dev_base_lock; /* Device list lock */
556
557extern int netdev_boot_setup_check(struct net_device *dev);
558extern unsigned long netdev_boot_base(const char *prefix, int unit);
559extern struct net_device *dev_getbyhwaddr(unsigned short type, char *hwaddr);
560extern struct net_device *dev_getfirstbyhwtype(unsigned short type);
561extern void dev_add_pack(struct packet_type *pt);
562extern void dev_remove_pack(struct packet_type *pt);
563extern void __dev_remove_pack(struct packet_type *pt);
564
565extern struct net_device *dev_get_by_flags(unsigned short flags,
566 unsigned short mask);
567extern struct net_device *dev_get_by_name(const char *name);
568extern struct net_device *__dev_get_by_name(const char *name);
569extern int dev_alloc_name(struct net_device *dev, const char *name);
570extern int dev_open(struct net_device *dev);
571extern int dev_close(struct net_device *dev);
572extern int dev_queue_xmit(struct sk_buff *skb);
573extern int register_netdevice(struct net_device *dev);
574extern int unregister_netdevice(struct net_device *dev);
575extern void free_netdev(struct net_device *dev);
576extern void synchronize_net(void);
577extern int register_netdevice_notifier(struct notifier_block *nb);
578extern int unregister_netdevice_notifier(struct notifier_block *nb);
579extern int call_netdevice_notifiers(unsigned long val, void *v);
580extern struct net_device *dev_get_by_index(int ifindex);
581extern struct net_device *__dev_get_by_index(int ifindex);
582extern int dev_restart(struct net_device *dev);
583#ifdef CONFIG_NETPOLL_TRAP
584extern int netpoll_trap(void);
585#endif
586
587typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
588extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
589static inline int unregister_gifconf(unsigned int family)
590{
591 return register_gifconf(family, NULL);
592}
593
594/*
595 * Incoming packets are placed on per-cpu queues so that
596 * no locking is needed.
597 */
598
599struct softnet_data
600{
31aa02c5 601 struct net_device *output_queue;
1da177e4
LT		 602 struct sk_buff_head input_pkt_queue;
603 struct list_head poll_list;
1da177e4
LT		 604 struct sk_buff *completion_queue;
605
606 struct net_device backlog_dev; /* Sorry. 8) */
db217334
CL		 607#ifdef CONFIG_NET_DMA
608 struct dma_chan *net_dma;
609#endif
1da177e4
LT		 610};
611
612DECLARE_PER_CPU(struct softnet_data,softnet_data);
613
614#define HAVE_NETIF_QUEUE
615
56079431 616extern void __netif_schedule(struct net_device *dev);
1da177e4
LT		 617
618static inline void netif_schedule(struct net_device *dev)
619{
620 if (!test_bit(__LINK_STATE_XOFF, &dev->state))
621 __netif_schedule(dev);
622}
623
624static inline void netif_start_queue(struct net_device *dev)
625{
626 clear_bit(__LINK_STATE_XOFF, &dev->state);
627}
628
629static inline void netif_wake_queue(struct net_device *dev)
630{
631#ifdef CONFIG_NETPOLL_TRAP
632 if (netpoll_trap())
633 return;
634#endif
635 if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state))
636 __netif_schedule(dev);
637}
638
639static inline void netif_stop_queue(struct net_device *dev)
640{
641#ifdef CONFIG_NETPOLL_TRAP
642 if (netpoll_trap())
643 return;
644#endif
645 set_bit(__LINK_STATE_XOFF, &dev->state);
646}
647
648static inline int netif_queue_stopped(const struct net_device *dev)
649{
650 return test_bit(__LINK_STATE_XOFF, &dev->state);
651}
652
653static inline int netif_running(const struct net_device *dev)
654{
655 return test_bit(__LINK_STATE_START, &dev->state);
656}
657
658
659/* Use this variant when it is known for sure that it
660 * is executing from interrupt context.
661 */
662static inline void dev_kfree_skb_irq(struct sk_buff *skb)
663{
664 if (atomic_dec_and_test(&skb->users)) {
665 struct softnet_data *sd;
666 unsigned long flags;
667
668 local_irq_save(flags);
669 sd = &__get_cpu_var(softnet_data);
670 skb->next = sd->completion_queue;
671 sd->completion_queue = skb;
672 raise_softirq_irqoff(NET_TX_SOFTIRQ);
673 local_irq_restore(flags);
674 }
675}
676
677/* Use this variant in places where it could be invoked
678 * either from interrupt or non-interrupt context.
679 */
56079431 680extern void dev_kfree_skb_any(struct sk_buff *skb);
1da177e4
LT		 681
682#define HAVE_NETIF_RX 1
683extern int netif_rx(struct sk_buff *skb);
684extern int netif_rx_ni(struct sk_buff *skb);
685#define HAVE_NETIF_RECEIVE_SKB 1
686extern int netif_receive_skb(struct sk_buff *skb);
c2373ee9 687extern int dev_valid_name(const char *name);
1da177e4
LT		 688extern int dev_ioctl(unsigned int cmd, void __user *);
689extern int dev_ethtool(struct ifreq *);
690extern unsigned dev_get_flags(const struct net_device *);
691extern int dev_change_flags(struct net_device *, unsigned);
692extern int dev_change_name(struct net_device *, char *);
693extern int dev_set_mtu(struct net_device *, int);
694extern int dev_set_mac_address(struct net_device *,
695 struct sockaddr *);
f6a78bfc
HX		 696extern int dev_hard_start_xmit(struct sk_buff *skb,
697 struct net_device *dev);
1da177e4
LT		 698
699extern void dev_init(void);
700
701extern int netdev_nit;
20380731 702extern int netdev_budget;
1da177e4
LT		 703
704/* Called by rtnetlink.c:rtnl_unlock() */
705extern void netdev_run_todo(void);
706
707static inline void dev_put(struct net_device *dev)
708{
709 atomic_dec(&dev->refcnt);
710}
711
15333061
SH		 712static inline void dev_hold(struct net_device *dev)
713{
714 atomic_inc(&dev->refcnt);
715}
1da177e4
LT		 716
717/* Carrier loss detection, dial on demand. The functions netif_carrier_on
718 * and _off may be called from IRQ context, but it is caller
719 * who is responsible for serialization of these calls.
b00055aa
SR		 720 *
721 * The name carrier is inappropriate, these functions should really be
722 * called netif_lowerlayer_*() because they represent the state of any
723 * kind of lower layer not just hardware media.
1da177e4
LT		 724 */
725
726extern void linkwatch_fire_event(struct net_device *dev);
727
728static inline int netif_carrier_ok(const struct net_device *dev)
729{
730 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
731}
732
733extern void __netdev_watchdog_up(struct net_device *dev);
734
0a242efc 735extern void netif_carrier_on(struct net_device *dev);
1da177e4 736
0a242efc 737extern void netif_carrier_off(struct net_device *dev);
1da177e4 738
b00055aa
SR		 739static inline void netif_dormant_on(struct net_device *dev)
740{
741 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
742 linkwatch_fire_event(dev);
743}
744
745static inline void netif_dormant_off(struct net_device *dev)
746{
747 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
748 linkwatch_fire_event(dev);
749}
750
751static inline int netif_dormant(const struct net_device *dev)
752{
753 return test_bit(__LINK_STATE_DORMANT, &dev->state);
754}
755
756
757static inline int netif_oper_up(const struct net_device *dev) {
758 return (dev->operstate == IF_OPER_UP ||
759 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
760}
761
1da177e4
LT		 762/* Hot-plugging. */
763static inline int netif_device_present(struct net_device *dev)
764{
765 return test_bit(__LINK_STATE_PRESENT, &dev->state);
766}
767
56079431 768extern void netif_device_detach(struct net_device *dev);
1da177e4 769
56079431 770extern void netif_device_attach(struct net_device *dev);
1da177e4
LT		 771
772/*
773 * Network interface message level settings
774 */
775#define HAVE_NETIF_MSG 1
776
777enum {
778 NETIF_MSG_DRV = 0x0001,
779 NETIF_MSG_PROBE = 0x0002,
780 NETIF_MSG_LINK = 0x0004,
781 NETIF_MSG_TIMER = 0x0008,
782 NETIF_MSG_IFDOWN = 0x0010,
783 NETIF_MSG_IFUP = 0x0020,
784 NETIF_MSG_RX_ERR = 0x0040,
785 NETIF_MSG_TX_ERR = 0x0080,
786 NETIF_MSG_TX_QUEUED = 0x0100,
787 NETIF_MSG_INTR = 0x0200,
788 NETIF_MSG_TX_DONE = 0x0400,
789 NETIF_MSG_RX_STATUS = 0x0800,
790 NETIF_MSG_PKTDATA = 0x1000,
791 NETIF_MSG_HW = 0x2000,
792 NETIF_MSG_WOL = 0x4000,
793};
794
795#define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
796#define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
797#define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
798#define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
799#define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
800#define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
801#define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
802#define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
803#define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
804#define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
805#define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
806#define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
807#define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
808#define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
809#define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
810
811static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
812{
813 /* use default */
814 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
815 return default_msg_enable_bits;
816 if (debug_value == 0) /* no output */
817 return 0;
818 /* set low N bits */
819 return (1 << debug_value) - 1;
820}
821
0a122576
SH		 822/* Test if receive needs to be scheduled */
823static inline int __netif_rx_schedule_prep(struct net_device *dev)
793b883e
SH		 824{
825 return !test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state);
826}
1da177e4 827
0a122576 828/* Test if receive needs to be scheduled but only if up */
1da177e4
LT		 829static inline int netif_rx_schedule_prep(struct net_device *dev)
830{
0a122576 831 return netif_running(dev) && __netif_rx_schedule_prep(dev);
1da177e4
LT		 832}
833
834/* Add interface to tail of rx poll list. This assumes that _prep has
835 * already been called and returned 1.
836 */
837
56079431 838extern void __netif_rx_schedule(struct net_device *dev);
1da177e4
LT		 839
840/* Try to reschedule poll. Called by irq handler. */
841
842static inline void netif_rx_schedule(struct net_device *dev)
843{
844 if (netif_rx_schedule_prep(dev))
845 __netif_rx_schedule(dev);
846}
847
d3240312
SH		 848/* Try to reschedule poll. Called by dev->poll() after netif_rx_complete().
849 * Do not inline this?
850 */
1da177e4
LT		 851static inline int netif_rx_reschedule(struct net_device *dev, int undo)
852{
853 if (netif_rx_schedule_prep(dev)) {
854 unsigned long flags;
d3240312
SH		 855
856 dev->quota += undo;
857
1da177e4 858 local_irq_save(flags);
d3240312
SH		 859 list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
860 __raise_softirq_irqoff(NET_RX_SOFTIRQ);
1da177e4
LT		 861 local_irq_restore(flags);
862 return 1;
863 }
864 return 0;
865}
866
867/* Remove interface from poll list: it must be in the poll list
868 * on current cpu. This primitive is called by dev->poll(), when
869 * it completes the work. The device cannot be out of poll list at this
870 * moment, it is BUG().
871 */
872static inline void netif_rx_complete(struct net_device *dev)
873{
874 unsigned long flags;
875
876 local_irq_save(flags);
877 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
878 list_del(&dev->poll_list);
879 smp_mb__before_clear_bit();
880 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
881 local_irq_restore(flags);
882}
883
884static inline void netif_poll_disable(struct net_device *dev)
885{
3173c890 886 while (test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state))
1da177e4 887 /* No hurry. */
3173c890 888 schedule_timeout_interruptible(1);
1da177e4
LT		 889}
890
891static inline void netif_poll_enable(struct net_device *dev)
892{
893 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
894}
895
896/* same as netif_rx_complete, except that local_irq_save(flags)
897 * has already been issued
898 */
899static inline void __netif_rx_complete(struct net_device *dev)
900{
901 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
902 list_del(&dev->poll_list);
903 smp_mb__before_clear_bit();
904 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
905}
906
932ff279
HX		 907static inline void netif_tx_lock(struct net_device *dev)
908{
909 spin_lock(&dev->_xmit_lock);
910 dev->xmit_lock_owner = smp_processor_id();
911}
912
913static inline void netif_tx_lock_bh(struct net_device *dev)
914{
915 spin_lock_bh(&dev->_xmit_lock);
916 dev->xmit_lock_owner = smp_processor_id();
917}
918
919static inline int netif_tx_trylock(struct net_device *dev)
920{
921 int err = spin_trylock(&dev->_xmit_lock);
922 if (!err)
923 dev->xmit_lock_owner = smp_processor_id();
924 return err;
925}
926
927static inline void netif_tx_unlock(struct net_device *dev)
928{
929 dev->xmit_lock_owner = -1;
930 spin_unlock(&dev->_xmit_lock);
931}
932
933static inline void netif_tx_unlock_bh(struct net_device *dev)
934{
935 dev->xmit_lock_owner = -1;
936 spin_unlock_bh(&dev->_xmit_lock);
937}
938
1da177e4
LT		 939static inline void netif_tx_disable(struct net_device *dev)
940{
932ff279 941 netif_tx_lock_bh(dev);
1da177e4 942 netif_stop_queue(dev);
932ff279 943 netif_tx_unlock_bh(dev);
1da177e4
LT		 944}
945
946/* These functions live elsewhere (drivers/net/net_init.c, but related) */
947
948extern void ether_setup(struct net_device *dev);
949
950/* Support for loadable net-drivers */
951extern struct net_device *alloc_netdev(int sizeof_priv, const char *name,
952 void (*setup)(struct net_device *));
953extern int register_netdev(struct net_device *dev);
954extern void unregister_netdev(struct net_device *dev);
955/* Functions used for multicast support */
956extern void dev_mc_upload(struct net_device *dev);
957extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
958extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
959extern void dev_mc_discard(struct net_device *dev);
960extern void dev_set_promiscuity(struct net_device *dev, int inc);
961extern void dev_set_allmulti(struct net_device *dev, int inc);
962extern void netdev_state_change(struct net_device *dev);
d8a33ac4 963extern void netdev_features_change(struct net_device *dev);
1da177e4
LT		 964/* Load a device via the kmod */
965extern void dev_load(const char *name);
966extern void dev_mcast_init(void);
967extern int netdev_max_backlog;
968extern int weight_p;
969extern int netdev_set_master(struct net_device *dev, struct net_device *master);
970extern int skb_checksum_help(struct sk_buff *skb, int inward);
f6a78bfc 971extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int sg);
fb286bb2
HX		 972#ifdef CONFIG_BUG
973extern void netdev_rx_csum_fault(struct net_device *dev);
974#else
975static inline void netdev_rx_csum_fault(struct net_device *dev)
976{
977}
978#endif
1da177e4
LT		 979/* rx skb timestamps */
980extern void net_enable_timestamp(void);
981extern void net_disable_timestamp(void);
982
20380731
ACM		 983#ifdef CONFIG_PROC_FS
984extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
985extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
986extern void dev_seq_stop(struct seq_file *seq, void *v);
987#endif
988
989extern void linkwatch_run_queue(void);
990
7967168c
HX		 991static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
992{
993 int feature = skb_shinfo(skb)->gso_type << NETIF_F_GSO_SHIFT;
994 return skb_shinfo(skb)->gso_size &&
995 (dev->features & feature) != feature;
996}
997
1da177e4
LT		 998#endif /* __KERNEL__ */
999
1000#endif /* _LINUX_DEV_H */
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