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[NET]: Merge TSO/UFO fields in sk_buff
[net-next-2.6.git] / include / linux / netdevice.h
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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
408 /* ingress path synchronizer */
409 spinlock_t ingress_lock;
9356b8fc
ED		 410 struct Qdisc *qdisc_ingress;
411
412/*
413 * One part is mostly used on xmit path (device)
414 */
1da177e4 415 /* hard_start_xmit synchronizer */
932ff279 416 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
1da177e4
LT		 417 /* cpu id of processor entered to hard_start_xmit or -1,
418 if nobody entered there.
419 */
420 int xmit_lock_owner;
9356b8fc
ED		 421 void *priv; /* pointer to private data */
422 int (*hard_start_xmit) (struct sk_buff *skb,
423 struct net_device *dev);
424 /* These may be needed for future network-power-down code. */
425 unsigned long trans_start; /* Time (in jiffies) of last Tx */
426
427 int watchdog_timeo; /* used by dev_watchdog() */
428 struct timer_list watchdog_timer;
429
430/*
431 * refcnt is a very hot point, so align it on SMP
432 */
1da177e4 433 /* Number of references to this device */
9356b8fc
ED		 434 atomic_t refcnt ____cacheline_aligned_in_smp;
435
1da177e4
LT		 436 /* delayed register/unregister */
437 struct list_head todo_list;
1da177e4
LT		 438 /* device index hash chain */
439 struct hlist_node index_hlist;
440
441 /* register/unregister state machine */
442 enum { NETREG_UNINITIALIZED=0,
b17a7c17 443 NETREG_REGISTERED, /* completed register_netdevice */
1da177e4
LT		 444 NETREG_UNREGISTERING, /* called unregister_netdevice */
445 NETREG_UNREGISTERED, /* completed unregister todo */
446 NETREG_RELEASED, /* called free_netdev */
447 } reg_state;
448
1da177e4
LT		 449 /* Called after device is detached from network. */
450 void (*uninit)(struct net_device *dev);
451 /* Called after last user reference disappears. */
452 void (*destructor)(struct net_device *dev);
453
454 /* Pointers to interface service routines. */
455 int (*open)(struct net_device *dev);
456 int (*stop)(struct net_device *dev);
1da177e4 457#define HAVE_NETDEV_POLL
1da177e4
LT		 458 int (*hard_header) (struct sk_buff *skb,
459 struct net_device *dev,
460 unsigned short type,
461 void *daddr,
462 void *saddr,
463 unsigned len);
464 int (*rebuild_header)(struct sk_buff *skb);
465#define HAVE_MULTICAST
466 void (*set_multicast_list)(struct net_device *dev);
467#define HAVE_SET_MAC_ADDR
468 int (*set_mac_address)(struct net_device *dev,
469 void *addr);
470#define HAVE_PRIVATE_IOCTL
471 int (*do_ioctl)(struct net_device *dev,
472 struct ifreq *ifr, int cmd);
473#define HAVE_SET_CONFIG
474 int (*set_config)(struct net_device *dev,
475 struct ifmap *map);
476#define HAVE_HEADER_CACHE
477 int (*hard_header_cache)(struct neighbour *neigh,
478 struct hh_cache *hh);
479 void (*header_cache_update)(struct hh_cache *hh,
480 struct net_device *dev,
481 unsigned char * haddr);
482#define HAVE_CHANGE_MTU
483 int (*change_mtu)(struct net_device *dev, int new_mtu);
484
485#define HAVE_TX_TIMEOUT
486 void (*tx_timeout) (struct net_device *dev);
487
488 void (*vlan_rx_register)(struct net_device *dev,
489 struct vlan_group *grp);
490 void (*vlan_rx_add_vid)(struct net_device *dev,
491 unsigned short vid);
492 void (*vlan_rx_kill_vid)(struct net_device *dev,
493 unsigned short vid);
494
495 int (*hard_header_parse)(struct sk_buff *skb,
496 unsigned char *haddr);
497 int (*neigh_setup)(struct net_device *dev, struct neigh_parms *);
498#ifdef CONFIG_NETPOLL
115c1d6e 499 struct netpoll_info *npinfo;
1da177e4
LT		 500#endif
501#ifdef CONFIG_NET_POLL_CONTROLLER
502 void (*poll_controller)(struct net_device *dev);
503#endif
504
505 /* bridge stuff */
506 struct net_bridge_port *br_port;
507
508#ifdef CONFIG_NET_DIVERT
509 /* this will get initialized at each interface type init routine */
510 struct divert_blk *divert;
511#endif /* CONFIG_NET_DIVERT */
512
513 /* class/net/name entry */
514 struct class_device class_dev;
fe9925b5
SH		 515 /* space for optional statistics and wireless sysfs groups */
516 struct attribute_group *sysfs_groups[3];
1da177e4
LT		 517};
518
519#define NETDEV_ALIGN 32
520#define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
521
522static inline void *netdev_priv(struct net_device *dev)
523{
524 return (char *)dev + ((sizeof(struct net_device)
525 + NETDEV_ALIGN_CONST)
526 & ~NETDEV_ALIGN_CONST);
527}
528
529#define SET_MODULE_OWNER(dev) do { } while (0)
530/* Set the sysfs physical device reference for the network logical device
531 * if set prior to registration will cause a symlink during initialization.
532 */
533#define SET_NETDEV_DEV(net, pdev) ((net)->class_dev.dev = (pdev))
534
535struct packet_type {
f2ccd8fa
DM		 536 __be16 type; /* This is really htons(ether_type). */
537 struct net_device *dev; /* NULL is wildcarded here */
538 int (*func) (struct sk_buff *,
539 struct net_device *,
540 struct packet_type *,
541 struct net_device *);
1da177e4
LT		 542 void *af_packet_priv;
543 struct list_head list;
544};
545
546#include <linux/interrupt.h>
547#include <linux/notifier.h>
548
549extern struct net_device loopback_dev; /* The loopback */
550extern struct net_device *dev_base; /* All devices */
551extern rwlock_t dev_base_lock; /* Device list lock */
552
553extern int netdev_boot_setup_check(struct net_device *dev);
554extern unsigned long netdev_boot_base(const char *prefix, int unit);
555extern struct net_device *dev_getbyhwaddr(unsigned short type, char *hwaddr);
556extern struct net_device *dev_getfirstbyhwtype(unsigned short type);
557extern void dev_add_pack(struct packet_type *pt);
558extern void dev_remove_pack(struct packet_type *pt);
559extern void __dev_remove_pack(struct packet_type *pt);
560
561extern struct net_device *dev_get_by_flags(unsigned short flags,
562 unsigned short mask);
563extern struct net_device *dev_get_by_name(const char *name);
564extern struct net_device *__dev_get_by_name(const char *name);
565extern int dev_alloc_name(struct net_device *dev, const char *name);
566extern int dev_open(struct net_device *dev);
567extern int dev_close(struct net_device *dev);
568extern int dev_queue_xmit(struct sk_buff *skb);
569extern int register_netdevice(struct net_device *dev);
570extern int unregister_netdevice(struct net_device *dev);
571extern void free_netdev(struct net_device *dev);
572extern void synchronize_net(void);
573extern int register_netdevice_notifier(struct notifier_block *nb);
574extern int unregister_netdevice_notifier(struct notifier_block *nb);
575extern int call_netdevice_notifiers(unsigned long val, void *v);
576extern struct net_device *dev_get_by_index(int ifindex);
577extern struct net_device *__dev_get_by_index(int ifindex);
578extern int dev_restart(struct net_device *dev);
579#ifdef CONFIG_NETPOLL_TRAP
580extern int netpoll_trap(void);
581#endif
582
583typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
584extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
585static inline int unregister_gifconf(unsigned int family)
586{
587 return register_gifconf(family, NULL);
588}
589
590/*
591 * Incoming packets are placed on per-cpu queues so that
592 * no locking is needed.
593 */
594
595struct softnet_data
596{
31aa02c5 597 struct net_device *output_queue;
1da177e4
LT		 598 struct sk_buff_head input_pkt_queue;
599 struct list_head poll_list;
1da177e4
LT		 600 struct sk_buff *completion_queue;
601
602 struct net_device backlog_dev; /* Sorry. 8) */
db217334
CL		 603#ifdef CONFIG_NET_DMA
604 struct dma_chan *net_dma;
605#endif
1da177e4
LT		 606};
607
608DECLARE_PER_CPU(struct softnet_data,softnet_data);
609
610#define HAVE_NETIF_QUEUE
611
56079431 612extern void __netif_schedule(struct net_device *dev);
1da177e4
LT		 613
614static inline void netif_schedule(struct net_device *dev)
615{
616 if (!test_bit(__LINK_STATE_XOFF, &dev->state))
617 __netif_schedule(dev);
618}
619
620static inline void netif_start_queue(struct net_device *dev)
621{
622 clear_bit(__LINK_STATE_XOFF, &dev->state);
623}
624
625static inline void netif_wake_queue(struct net_device *dev)
626{
627#ifdef CONFIG_NETPOLL_TRAP
628 if (netpoll_trap())
629 return;
630#endif
631 if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state))
632 __netif_schedule(dev);
633}
634
635static inline void netif_stop_queue(struct net_device *dev)
636{
637#ifdef CONFIG_NETPOLL_TRAP
638 if (netpoll_trap())
639 return;
640#endif
641 set_bit(__LINK_STATE_XOFF, &dev->state);
642}
643
644static inline int netif_queue_stopped(const struct net_device *dev)
645{
646 return test_bit(__LINK_STATE_XOFF, &dev->state);
647}
648
649static inline int netif_running(const struct net_device *dev)
650{
651 return test_bit(__LINK_STATE_START, &dev->state);
652}
653
654
655/* Use this variant when it is known for sure that it
656 * is executing from interrupt context.
657 */
658static inline void dev_kfree_skb_irq(struct sk_buff *skb)
659{
660 if (atomic_dec_and_test(&skb->users)) {
661 struct softnet_data *sd;
662 unsigned long flags;
663
664 local_irq_save(flags);
665 sd = &__get_cpu_var(softnet_data);
666 skb->next = sd->completion_queue;
667 sd->completion_queue = skb;
668 raise_softirq_irqoff(NET_TX_SOFTIRQ);
669 local_irq_restore(flags);
670 }
671}
672
673/* Use this variant in places where it could be invoked
674 * either from interrupt or non-interrupt context.
675 */
56079431 676extern void dev_kfree_skb_any(struct sk_buff *skb);
1da177e4
LT		 677
678#define HAVE_NETIF_RX 1
679extern int netif_rx(struct sk_buff *skb);
680extern int netif_rx_ni(struct sk_buff *skb);
681#define HAVE_NETIF_RECEIVE_SKB 1
682extern int netif_receive_skb(struct sk_buff *skb);
c2373ee9 683extern int dev_valid_name(const char *name);
1da177e4
LT		 684extern int dev_ioctl(unsigned int cmd, void __user *);
685extern int dev_ethtool(struct ifreq *);
686extern unsigned dev_get_flags(const struct net_device *);
687extern int dev_change_flags(struct net_device *, unsigned);
688extern int dev_change_name(struct net_device *, char *);
689extern int dev_set_mtu(struct net_device *, int);
690extern int dev_set_mac_address(struct net_device *,
691 struct sockaddr *);
692extern void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev);
693
694extern void dev_init(void);
695
696extern int netdev_nit;
20380731 697extern int netdev_budget;
1da177e4
LT		 698
699/* Called by rtnetlink.c:rtnl_unlock() */
700extern void netdev_run_todo(void);
701
702static inline void dev_put(struct net_device *dev)
703{
704 atomic_dec(&dev->refcnt);
705}
706
15333061
SH		 707static inline void dev_hold(struct net_device *dev)
708{
709 atomic_inc(&dev->refcnt);
710}
1da177e4
LT		 711
712/* Carrier loss detection, dial on demand. The functions netif_carrier_on
713 * and _off may be called from IRQ context, but it is caller
714 * who is responsible for serialization of these calls.
b00055aa
SR		 715 *
716 * The name carrier is inappropriate, these functions should really be
717 * called netif_lowerlayer_*() because they represent the state of any
718 * kind of lower layer not just hardware media.
1da177e4
LT		 719 */
720
721extern void linkwatch_fire_event(struct net_device *dev);
722
723static inline int netif_carrier_ok(const struct net_device *dev)
724{
725 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
726}
727
728extern void __netdev_watchdog_up(struct net_device *dev);
729
0a242efc 730extern void netif_carrier_on(struct net_device *dev);
1da177e4 731
0a242efc 732extern void netif_carrier_off(struct net_device *dev);
1da177e4 733
b00055aa
SR		 734static inline void netif_dormant_on(struct net_device *dev)
735{
736 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
737 linkwatch_fire_event(dev);
738}
739
740static inline void netif_dormant_off(struct net_device *dev)
741{
742 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
743 linkwatch_fire_event(dev);
744}
745
746static inline int netif_dormant(const struct net_device *dev)
747{
748 return test_bit(__LINK_STATE_DORMANT, &dev->state);
749}
750
751
752static inline int netif_oper_up(const struct net_device *dev) {
753 return (dev->operstate == IF_OPER_UP ||
754 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
755}
756
1da177e4
LT		 757/* Hot-plugging. */
758static inline int netif_device_present(struct net_device *dev)
759{
760 return test_bit(__LINK_STATE_PRESENT, &dev->state);
761}
762
56079431 763extern void netif_device_detach(struct net_device *dev);
1da177e4 764
56079431 765extern void netif_device_attach(struct net_device *dev);
1da177e4
LT		 766
767/*
768 * Network interface message level settings
769 */
770#define HAVE_NETIF_MSG 1
771
772enum {
773 NETIF_MSG_DRV = 0x0001,
774 NETIF_MSG_PROBE = 0x0002,
775 NETIF_MSG_LINK = 0x0004,
776 NETIF_MSG_TIMER = 0x0008,
777 NETIF_MSG_IFDOWN = 0x0010,
778 NETIF_MSG_IFUP = 0x0020,
779 NETIF_MSG_RX_ERR = 0x0040,
780 NETIF_MSG_TX_ERR = 0x0080,
781 NETIF_MSG_TX_QUEUED = 0x0100,
782 NETIF_MSG_INTR = 0x0200,
783 NETIF_MSG_TX_DONE = 0x0400,
784 NETIF_MSG_RX_STATUS = 0x0800,
785 NETIF_MSG_PKTDATA = 0x1000,
786 NETIF_MSG_HW = 0x2000,
787 NETIF_MSG_WOL = 0x4000,
788};
789
790#define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
791#define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
792#define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
793#define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
794#define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
795#define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
796#define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
797#define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
798#define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
799#define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
800#define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
801#define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
802#define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
803#define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
804#define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
805
806static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
807{
808 /* use default */
809 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
810 return default_msg_enable_bits;
811 if (debug_value == 0) /* no output */
812 return 0;
813 /* set low N bits */
814 return (1 << debug_value) - 1;
815}
816
0a122576
SH		 817/* Test if receive needs to be scheduled */
818static inline int __netif_rx_schedule_prep(struct net_device *dev)
793b883e
SH		 819{
820 return !test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state);
821}
1da177e4 822
0a122576 823/* Test if receive needs to be scheduled but only if up */
1da177e4
LT		 824static inline int netif_rx_schedule_prep(struct net_device *dev)
825{
0a122576 826 return netif_running(dev) && __netif_rx_schedule_prep(dev);
1da177e4
LT		 827}
828
829/* Add interface to tail of rx poll list. This assumes that _prep has
830 * already been called and returned 1.
831 */
832
56079431 833extern void __netif_rx_schedule(struct net_device *dev);
1da177e4
LT		 834
835/* Try to reschedule poll. Called by irq handler. */
836
837static inline void netif_rx_schedule(struct net_device *dev)
838{
839 if (netif_rx_schedule_prep(dev))
840 __netif_rx_schedule(dev);
841}
842
d3240312
SH		 843/* Try to reschedule poll. Called by dev->poll() after netif_rx_complete().
844 * Do not inline this?
845 */
1da177e4
LT		 846static inline int netif_rx_reschedule(struct net_device *dev, int undo)
847{
848 if (netif_rx_schedule_prep(dev)) {
849 unsigned long flags;
d3240312
SH		 850
851 dev->quota += undo;
852
1da177e4 853 local_irq_save(flags);
d3240312
SH		 854 list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
855 __raise_softirq_irqoff(NET_RX_SOFTIRQ);
1da177e4
LT		 856 local_irq_restore(flags);
857 return 1;
858 }
859 return 0;
860}
861
862/* Remove interface from poll list: it must be in the poll list
863 * on current cpu. This primitive is called by dev->poll(), when
864 * it completes the work. The device cannot be out of poll list at this
865 * moment, it is BUG().
866 */
867static inline void netif_rx_complete(struct net_device *dev)
868{
869 unsigned long flags;
870
871 local_irq_save(flags);
872 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
873 list_del(&dev->poll_list);
874 smp_mb__before_clear_bit();
875 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
876 local_irq_restore(flags);
877}
878
879static inline void netif_poll_disable(struct net_device *dev)
880{
3173c890 881 while (test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state))
1da177e4 882 /* No hurry. */
3173c890 883 schedule_timeout_interruptible(1);
1da177e4
LT		 884}
885
886static inline void netif_poll_enable(struct net_device *dev)
887{
888 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
889}
890
891/* same as netif_rx_complete, except that local_irq_save(flags)
892 * has already been issued
893 */
894static inline void __netif_rx_complete(struct net_device *dev)
895{
896 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
897 list_del(&dev->poll_list);
898 smp_mb__before_clear_bit();
899 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
900}
901
932ff279
HX		 902static inline void netif_tx_lock(struct net_device *dev)
903{
904 spin_lock(&dev->_xmit_lock);
905 dev->xmit_lock_owner = smp_processor_id();
906}
907
908static inline void netif_tx_lock_bh(struct net_device *dev)
909{
910 spin_lock_bh(&dev->_xmit_lock);
911 dev->xmit_lock_owner = smp_processor_id();
912}
913
914static inline int netif_tx_trylock(struct net_device *dev)
915{
916 int err = spin_trylock(&dev->_xmit_lock);
917 if (!err)
918 dev->xmit_lock_owner = smp_processor_id();
919 return err;
920}
921
922static inline void netif_tx_unlock(struct net_device *dev)
923{
924 dev->xmit_lock_owner = -1;
925 spin_unlock(&dev->_xmit_lock);
926}
927
928static inline void netif_tx_unlock_bh(struct net_device *dev)
929{
930 dev->xmit_lock_owner = -1;
931 spin_unlock_bh(&dev->_xmit_lock);
932}
933
1da177e4
LT		 934static inline void netif_tx_disable(struct net_device *dev)
935{
932ff279 936 netif_tx_lock_bh(dev);
1da177e4 937 netif_stop_queue(dev);
932ff279 938 netif_tx_unlock_bh(dev);
1da177e4
LT		 939}
940
941/* These functions live elsewhere (drivers/net/net_init.c, but related) */
942
943extern void ether_setup(struct net_device *dev);
944
945/* Support for loadable net-drivers */
946extern struct net_device *alloc_netdev(int sizeof_priv, const char *name,
947 void (*setup)(struct net_device *));
948extern int register_netdev(struct net_device *dev);
949extern void unregister_netdev(struct net_device *dev);
950/* Functions used for multicast support */
951extern void dev_mc_upload(struct net_device *dev);
952extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
953extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
954extern void dev_mc_discard(struct net_device *dev);
955extern void dev_set_promiscuity(struct net_device *dev, int inc);
956extern void dev_set_allmulti(struct net_device *dev, int inc);
957extern void netdev_state_change(struct net_device *dev);
d8a33ac4 958extern void netdev_features_change(struct net_device *dev);
1da177e4
LT		 959/* Load a device via the kmod */
960extern void dev_load(const char *name);
961extern void dev_mcast_init(void);
962extern int netdev_max_backlog;
963extern int weight_p;
964extern int netdev_set_master(struct net_device *dev, struct net_device *master);
965extern int skb_checksum_help(struct sk_buff *skb, int inward);
fb286bb2
HX		 966#ifdef CONFIG_BUG
967extern void netdev_rx_csum_fault(struct net_device *dev);
968#else
969static inline void netdev_rx_csum_fault(struct net_device *dev)
970{
971}
972#endif
1da177e4
LT		 973/* rx skb timestamps */
974extern void net_enable_timestamp(void);
975extern void net_disable_timestamp(void);
976
20380731
ACM		 977#ifdef CONFIG_PROC_FS
978extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
979extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
980extern void dev_seq_stop(struct seq_file *seq, void *v);
981#endif
982
983extern void linkwatch_run_queue(void);
984
7967168c
HX		 985static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
986{
987 int feature = skb_shinfo(skb)->gso_type << NETIF_F_GSO_SHIFT;
988 return skb_shinfo(skb)->gso_size &&
989 (dev->features & feature) != feature;
990}
991
1da177e4
LT		 992#endif /* __KERNEL__ */
993
994#endif /* _LINUX_DEV_H */
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