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[WIRELESS] cfg80211: New wireless config infrastructure.
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / linux / netdevice.h
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 <linux/timer.h>
34 #include <asm/atomic.h>
35 #include <asm/cache.h>
36 #include <asm/byteorder.h>
37
38 #include <linux/device.h>
39 #include <linux/percpu.h>
40 #include <linux/dmaengine.h>
41
42 struct vlan_group;
43 struct ethtool_ops;
44 struct netpoll_info;
45 /* 802.11 specific */
46 struct wireless_dev;
47 /* source back-compat hooks */
48 #define SET_ETHTOOL_OPS(netdev,ops) \
49 ( (netdev)->ethtool_ops = (ops) )
50
51 #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
52 functions are available. */
53 #define HAVE_FREE_NETDEV /* free_netdev() */
54 #define HAVE_NETDEV_PRIV /* netdev_priv() */
55
56 #define NET_XMIT_SUCCESS 0
57 #define NET_XMIT_DROP 1 /* skb dropped */
58 #define NET_XMIT_CN 2 /* congestion notification */
59 #define NET_XMIT_POLICED 3 /* skb is shot by police */
60 #define NET_XMIT_BYPASS 4 /* packet does not leave via dequeue;
61 (TC use only - dev_queue_xmit
62 returns this as NET_XMIT_SUCCESS) */
63
64 /* Backlog congestion levels */
65 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
66 #define NET_RX_DROP 1 /* packet dropped */
67 #define NET_RX_CN_LOW 2 /* storm alert, just in case */
68 #define NET_RX_CN_MOD 3 /* Storm on its way! */
69 #define NET_RX_CN_HIGH 4 /* The storm is here */
70 #define NET_RX_BAD 5 /* packet dropped due to kernel error */
71
72 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
73 * indicates that the device will soon be dropping packets, or already drops
74 * some packets of the same priority; prompting us to send less aggressively. */
75 #define net_xmit_eval(e) ((e) == NET_XMIT_CN? 0 : (e))
76 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
77
78 #endif
79
80 #define MAX_ADDR_LEN 32 /* Largest hardware address length */
81
82 /* Driver transmit return codes */
83 #define NETDEV_TX_OK 0 /* driver took care of packet */
84 #define NETDEV_TX_BUSY 1 /* driver tx path was busy*/
85 #define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */
86
87 /*
88 * Compute the worst case header length according to the protocols
89 * used.
90 */
91
92 #if !defined(CONFIG_AX25) && !defined(CONFIG_AX25_MODULE) && !defined(CONFIG_TR)
93 #define LL_MAX_HEADER 32
94 #else
95 #if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
96 #define LL_MAX_HEADER 96
97 #else
98 #define LL_MAX_HEADER 48
99 #endif
100 #endif
101
102 #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
103 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
104 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
105 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
106 #define MAX_HEADER LL_MAX_HEADER
107 #else
108 #define MAX_HEADER (LL_MAX_HEADER + 48)
109 #endif
110
111 /*
112 * Network device statistics. Akin to the 2.0 ether stats but
113 * with byte counters.
114 */
115
116 struct net_device_stats
117 {
118 unsigned long rx_packets; /* total packets received */
119 unsigned long tx_packets; /* total packets transmitted */
120 unsigned long rx_bytes; /* total bytes received */
121 unsigned long tx_bytes; /* total bytes transmitted */
122 unsigned long rx_errors; /* bad packets received */
123 unsigned long tx_errors; /* packet transmit problems */
124 unsigned long rx_dropped; /* no space in linux buffers */
125 unsigned long tx_dropped; /* no space available in linux */
126 unsigned long multicast; /* multicast packets received */
127 unsigned long collisions;
128
129 /* detailed rx_errors: */
130 unsigned long rx_length_errors;
131 unsigned long rx_over_errors; /* receiver ring buff overflow */
132 unsigned long rx_crc_errors; /* recved pkt with crc error */
133 unsigned long rx_frame_errors; /* recv'd frame alignment error */
134 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
135 unsigned long rx_missed_errors; /* receiver missed packet */
136
137 /* detailed tx_errors */
138 unsigned long tx_aborted_errors;
139 unsigned long tx_carrier_errors;
140 unsigned long tx_fifo_errors;
141 unsigned long tx_heartbeat_errors;
142 unsigned long tx_window_errors;
143
144 /* for cslip etc */
145 unsigned long rx_compressed;
146 unsigned long tx_compressed;
147 };
148
149
150 /* Media selection options. */
151 enum {
152 IF_PORT_UNKNOWN = 0,
153 IF_PORT_10BASE2,
154 IF_PORT_10BASET,
155 IF_PORT_AUI,
156 IF_PORT_100BASET,
157 IF_PORT_100BASETX,
158 IF_PORT_100BASEFX
159 };
160
161 #ifdef __KERNEL__
162
163 #include <linux/cache.h>
164 #include <linux/skbuff.h>
165
166 struct neighbour;
167 struct neigh_parms;
168 struct sk_buff;
169
170 struct netif_rx_stats
171 {
172 unsigned total;
173 unsigned dropped;
174 unsigned time_squeeze;
175 unsigned cpu_collision;
176 };
177
178 DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
179
180
181 /*
182 * We tag multicasts with these structures.
183 */
184
185 struct dev_mc_list
186 {
187 struct dev_mc_list *next;
188 __u8 dmi_addr[MAX_ADDR_LEN];
189 unsigned char dmi_addrlen;
190 int dmi_users;
191 int dmi_gusers;
192 };
193
194 struct hh_cache
195 {
196 struct hh_cache *hh_next; /* Next entry */
197 atomic_t hh_refcnt; /* number of users */
198 /*
199 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
200 * cache line on SMP.
201 * They are mostly read, but hh_refcnt may be changed quite frequently,
202 * incurring cache line ping pongs.
203 */
204 __be16 hh_type ____cacheline_aligned_in_smp;
205 /* protocol identifier, f.e ETH_P_IP
206 * NOTE: For VLANs, this will be the
207 * encapuslated type. --BLG
208 */
209 u16 hh_len; /* length of header */
210 int (*hh_output)(struct sk_buff *skb);
211 seqlock_t hh_lock;
212
213 /* cached hardware header; allow for machine alignment needs. */
214 #define HH_DATA_MOD 16
215 #define HH_DATA_OFF(__len) \
216 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
217 #define HH_DATA_ALIGN(__len) \
218 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
219 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
220 };
221
222 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
223 * Alternative is:
224 * dev->hard_header_len ? (dev->hard_header_len +
225 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
226 *
227 * We could use other alignment values, but we must maintain the
228 * relationship HH alignment <= LL alignment.
229 */
230 #define LL_RESERVED_SPACE(dev) \
231 (((dev)->hard_header_len&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
232 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
233 ((((dev)->hard_header_len+extra)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
234
235 /* These flag bits are private to the generic network queueing
236 * layer, they may not be explicitly referenced by any other
237 * code.
238 */
239
240 enum netdev_state_t
241 {
242 __LINK_STATE_XOFF=0,
243 __LINK_STATE_START,
244 __LINK_STATE_PRESENT,
245 __LINK_STATE_SCHED,
246 __LINK_STATE_NOCARRIER,
247 __LINK_STATE_RX_SCHED,
248 __LINK_STATE_LINKWATCH_PENDING,
249 __LINK_STATE_DORMANT,
250 __LINK_STATE_QDISC_RUNNING,
251 };
252
253
254 /*
255 * This structure holds at boot time configured netdevice settings. They
256 * are then used in the device probing.
257 */
258 struct netdev_boot_setup {
259 char name[IFNAMSIZ];
260 struct ifmap map;
261 };
262 #define NETDEV_BOOT_SETUP_MAX 8
263
264 extern int __init netdev_boot_setup(char *str);
265
266 /*
267 * The DEVICE structure.
268 * Actually, this whole structure is a big mistake. It mixes I/O
269 * data with strictly "high-level" data, and it has to know about
270 * almost every data structure used in the INET module.
271 *
272 * FIXME: cleanup struct net_device such that network protocol info
273 * moves out.
274 */
275
276 struct net_device
277 {
278
279 /*
280 * This is the first field of the "visible" part of this structure
281 * (i.e. as seen by users in the "Space.c" file). It is the name
282 * the interface.
283 */
284 char name[IFNAMSIZ];
285 /* device name hash chain */
286 struct hlist_node name_hlist;
287
288 /*
289 * I/O specific fields
290 * FIXME: Merge these and struct ifmap into one
291 */
292 unsigned long mem_end; /* shared mem end */
293 unsigned long mem_start; /* shared mem start */
294 unsigned long base_addr; /* device I/O address */
295 unsigned int irq; /* device IRQ number */
296
297 /*
298 * Some hardware also needs these fields, but they are not
299 * part of the usual set specified in Space.c.
300 */
301
302 unsigned char if_port; /* Selectable AUI, TP,..*/
303 unsigned char dma; /* DMA channel */
304
305 unsigned long state;
306
307 struct net_device *next;
308
309 /* The device initialization function. Called only once. */
310 int (*init)(struct net_device *dev);
311
312 /* ------- Fields preinitialized in Space.c finish here ------- */
313
314 /* Net device features */
315 unsigned long features;
316 #define NETIF_F_SG 1 /* Scatter/gather IO. */
317 #define NETIF_F_IP_CSUM 2 /* Can checksum only TCP/UDP over IPv4. */
318 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
319 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
320 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
321 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
322 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
323 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
324 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
325 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
326 #define NETIF_F_GSO 2048 /* Enable software GSO. */
327 #define NETIF_F_LLTX 4096 /* LockLess TX */
328 #define NETIF_F_INTERNAL_STATS 8192 /* Use stats structure in net_device */
329
330 /* Segmentation offload features */
331 #define NETIF_F_GSO_SHIFT 16
332 #define NETIF_F_GSO_MASK 0xffff0000
333 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
334 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
335 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
336 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
337 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
338
339 /* List of features with software fallbacks. */
340 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
341
342 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
343 #define NETIF_F_ALL_CSUM (NETIF_F_IP_CSUM | NETIF_F_GEN_CSUM)
344
345 struct net_device *next_sched;
346
347 /* Interface index. Unique device identifier */
348 int ifindex;
349 int iflink;
350
351
352 struct net_device_stats* (*get_stats)(struct net_device *dev);
353 struct net_device_stats stats;
354
355 /* List of functions to handle Wireless Extensions (instead of ioctl).
356 * See <net/iw_handler.h> for details. Jean II */
357 const struct iw_handler_def * wireless_handlers;
358 /* Instance data managed by the core of Wireless Extensions. */
359 struct iw_public_data * wireless_data;
360
361 const struct ethtool_ops *ethtool_ops;
362
363 /*
364 * This marks the end of the "visible" part of the structure. All
365 * fields hereafter are internal to the system, and may change at
366 * will (read: may be cleaned up at will).
367 */
368
369
370 unsigned int flags; /* interface flags (a la BSD) */
371 unsigned short gflags;
372 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
373 unsigned short padded; /* How much padding added by alloc_netdev() */
374
375 unsigned char operstate; /* RFC2863 operstate */
376 unsigned char link_mode; /* mapping policy to operstate */
377
378 unsigned mtu; /* interface MTU value */
379 unsigned short type; /* interface hardware type */
380 unsigned short hard_header_len; /* hardware hdr length */
381
382 struct net_device *master; /* Pointer to master device of a group,
383 * which this device is member of.
384 */
385
386 /* Interface address info. */
387 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
388 unsigned char addr_len; /* hardware address length */
389 unsigned short dev_id; /* for shared network cards */
390
391 struct dev_mc_list *mc_list; /* Multicast mac addresses */
392 int mc_count; /* Number of installed mcasts */
393 int promiscuity;
394 int allmulti;
395
396
397 /* Protocol specific pointers */
398
399 void *atalk_ptr; /* AppleTalk link */
400 void *ip_ptr; /* IPv4 specific data */
401 void *dn_ptr; /* DECnet specific data */
402 void *ip6_ptr; /* IPv6 specific data */
403 void *ec_ptr; /* Econet specific data */
404 void *ax25_ptr; /* AX.25 specific data */
405 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
406 assign before registering */
407
408 /*
409 * Cache line mostly used on receive path (including eth_type_trans())
410 */
411 struct list_head poll_list ____cacheline_aligned_in_smp;
412 /* Link to poll list */
413
414 int (*poll) (struct net_device *dev, int *quota);
415 int quota;
416 int weight;
417 unsigned long last_rx; /* Time of last Rx */
418 /* Interface address info used in eth_type_trans() */
419 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
420 because most packets are unicast) */
421
422 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
423
424 /*
425 * Cache line mostly used on queue transmit path (qdisc)
426 */
427 /* device queue lock */
428 spinlock_t queue_lock ____cacheline_aligned_in_smp;
429 struct Qdisc *qdisc;
430 struct Qdisc *qdisc_sleeping;
431 struct list_head qdisc_list;
432 unsigned long tx_queue_len; /* Max frames per queue allowed */
433
434 /* Partially transmitted GSO packet. */
435 struct sk_buff *gso_skb;
436
437 /* ingress path synchronizer */
438 spinlock_t ingress_lock;
439 struct Qdisc *qdisc_ingress;
440
441 /*
442 * One part is mostly used on xmit path (device)
443 */
444 /* hard_start_xmit synchronizer */
445 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
446 /* cpu id of processor entered to hard_start_xmit or -1,
447 if nobody entered there.
448 */
449 int xmit_lock_owner;
450 void *priv; /* pointer to private data */
451 int (*hard_start_xmit) (struct sk_buff *skb,
452 struct net_device *dev);
453 /* These may be needed for future network-power-down code. */
454 unsigned long trans_start; /* Time (in jiffies) of last Tx */
455
456 int watchdog_timeo; /* used by dev_watchdog() */
457 struct timer_list watchdog_timer;
458
459 /*
460 * refcnt is a very hot point, so align it on SMP
461 */
462 /* Number of references to this device */
463 atomic_t refcnt ____cacheline_aligned_in_smp;
464
465 /* delayed register/unregister */
466 struct list_head todo_list;
467 /* device index hash chain */
468 struct hlist_node index_hlist;
469
470 /* register/unregister state machine */
471 enum { NETREG_UNINITIALIZED=0,
472 NETREG_REGISTERED, /* completed register_netdevice */
473 NETREG_UNREGISTERING, /* called unregister_netdevice */
474 NETREG_UNREGISTERED, /* completed unregister todo */
475 NETREG_RELEASED, /* called free_netdev */
476 } reg_state;
477
478 /* Called after device is detached from network. */
479 void (*uninit)(struct net_device *dev);
480 /* Called after last user reference disappears. */
481 void (*destructor)(struct net_device *dev);
482
483 /* Pointers to interface service routines. */
484 int (*open)(struct net_device *dev);
485 int (*stop)(struct net_device *dev);
486 #define HAVE_NETDEV_POLL
487 int (*hard_header) (struct sk_buff *skb,
488 struct net_device *dev,
489 unsigned short type,
490 void *daddr,
491 void *saddr,
492 unsigned len);
493 int (*rebuild_header)(struct sk_buff *skb);
494 #define HAVE_MULTICAST
495 void (*set_multicast_list)(struct net_device *dev);
496 #define HAVE_SET_MAC_ADDR
497 int (*set_mac_address)(struct net_device *dev,
498 void *addr);
499 #define HAVE_PRIVATE_IOCTL
500 int (*do_ioctl)(struct net_device *dev,
501 struct ifreq *ifr, int cmd);
502 #define HAVE_SET_CONFIG
503 int (*set_config)(struct net_device *dev,
504 struct ifmap *map);
505 #define HAVE_HEADER_CACHE
506 int (*hard_header_cache)(struct neighbour *neigh,
507 struct hh_cache *hh);
508 void (*header_cache_update)(struct hh_cache *hh,
509 struct net_device *dev,
510 unsigned char * haddr);
511 #define HAVE_CHANGE_MTU
512 int (*change_mtu)(struct net_device *dev, int new_mtu);
513
514 #define HAVE_TX_TIMEOUT
515 void (*tx_timeout) (struct net_device *dev);
516
517 void (*vlan_rx_register)(struct net_device *dev,
518 struct vlan_group *grp);
519 void (*vlan_rx_add_vid)(struct net_device *dev,
520 unsigned short vid);
521 void (*vlan_rx_kill_vid)(struct net_device *dev,
522 unsigned short vid);
523
524 int (*hard_header_parse)(struct sk_buff *skb,
525 unsigned char *haddr);
526 int (*neigh_setup)(struct net_device *dev, struct neigh_parms *);
527 #ifdef CONFIG_NETPOLL
528 struct netpoll_info *npinfo;
529 #endif
530 #ifdef CONFIG_NET_POLL_CONTROLLER
531 void (*poll_controller)(struct net_device *dev);
532 #endif
533
534 /* bridge stuff */
535 struct net_bridge_port *br_port;
536
537 /* class/net/name entry */
538 struct device dev;
539 /* space for optional statistics and wireless sysfs groups */
540 struct attribute_group *sysfs_groups[3];
541 };
542 #define to_net_dev(d) container_of(d, struct net_device, dev)
543
544 #define NETDEV_ALIGN 32
545 #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
546
547 static inline void *netdev_priv(struct net_device *dev)
548 {
549 return (char *)dev + ((sizeof(struct net_device)
550 + NETDEV_ALIGN_CONST)
551 & ~NETDEV_ALIGN_CONST);
552 }
553
554 #define SET_MODULE_OWNER(dev) do { } while (0)
555 /* Set the sysfs physical device reference for the network logical device
556 * if set prior to registration will cause a symlink during initialization.
557 */
558 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
559
560 struct packet_type {
561 __be16 type; /* This is really htons(ether_type). */
562 struct net_device *dev; /* NULL is wildcarded here */
563 int (*func) (struct sk_buff *,
564 struct net_device *,
565 struct packet_type *,
566 struct net_device *);
567 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
568 int features);
569 int (*gso_send_check)(struct sk_buff *skb);
570 void *af_packet_priv;
571 struct list_head list;
572 };
573
574 #include <linux/interrupt.h>
575 #include <linux/notifier.h>
576
577 extern struct net_device loopback_dev; /* The loopback */
578 extern struct net_device *dev_base; /* All devices */
579 extern rwlock_t dev_base_lock; /* Device list lock */
580
581 extern int netdev_boot_setup_check(struct net_device *dev);
582 extern unsigned long netdev_boot_base(const char *prefix, int unit);
583 extern struct net_device *dev_getbyhwaddr(unsigned short type, char *hwaddr);
584 extern struct net_device *dev_getfirstbyhwtype(unsigned short type);
585 extern void dev_add_pack(struct packet_type *pt);
586 extern void dev_remove_pack(struct packet_type *pt);
587 extern void __dev_remove_pack(struct packet_type *pt);
588
589 extern struct net_device *dev_get_by_flags(unsigned short flags,
590 unsigned short mask);
591 extern struct net_device *dev_get_by_name(const char *name);
592 extern struct net_device *__dev_get_by_name(const char *name);
593 extern int dev_alloc_name(struct net_device *dev, const char *name);
594 extern int dev_open(struct net_device *dev);
595 extern int dev_close(struct net_device *dev);
596 extern int dev_queue_xmit(struct sk_buff *skb);
597 extern int register_netdevice(struct net_device *dev);
598 extern void unregister_netdevice(struct net_device *dev);
599 extern void free_netdev(struct net_device *dev);
600 extern void synchronize_net(void);
601 extern int register_netdevice_notifier(struct notifier_block *nb);
602 extern int unregister_netdevice_notifier(struct notifier_block *nb);
603 extern int call_netdevice_notifiers(unsigned long val, void *v);
604 extern struct net_device *dev_get_by_index(int ifindex);
605 extern struct net_device *__dev_get_by_index(int ifindex);
606 extern int dev_restart(struct net_device *dev);
607 #ifdef CONFIG_NETPOLL_TRAP
608 extern int netpoll_trap(void);
609 #endif
610
611 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
612 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
613 static inline int unregister_gifconf(unsigned int family)
614 {
615 return register_gifconf(family, NULL);
616 }
617
618 /*
619 * Incoming packets are placed on per-cpu queues so that
620 * no locking is needed.
621 */
622
623 struct softnet_data
624 {
625 struct net_device *output_queue;
626 struct sk_buff_head input_pkt_queue;
627 struct list_head poll_list;
628 struct sk_buff *completion_queue;
629
630 struct net_device backlog_dev; /* Sorry. 8) */
631 #ifdef CONFIG_NET_DMA
632 struct dma_chan *net_dma;
633 #endif
634 };
635
636 DECLARE_PER_CPU(struct softnet_data,softnet_data);
637
638 #define HAVE_NETIF_QUEUE
639
640 extern void __netif_schedule(struct net_device *dev);
641
642 static inline void netif_schedule(struct net_device *dev)
643 {
644 if (!test_bit(__LINK_STATE_XOFF, &dev->state))
645 __netif_schedule(dev);
646 }
647
648 static inline void netif_start_queue(struct net_device *dev)
649 {
650 clear_bit(__LINK_STATE_XOFF, &dev->state);
651 }
652
653 static inline void netif_wake_queue(struct net_device *dev)
654 {
655 #ifdef CONFIG_NETPOLL_TRAP
656 if (netpoll_trap())
657 return;
658 #endif
659 if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state))
660 __netif_schedule(dev);
661 }
662
663 static inline void netif_stop_queue(struct net_device *dev)
664 {
665 #ifdef CONFIG_NETPOLL_TRAP
666 if (netpoll_trap())
667 return;
668 #endif
669 set_bit(__LINK_STATE_XOFF, &dev->state);
670 }
671
672 static inline int netif_queue_stopped(const struct net_device *dev)
673 {
674 return test_bit(__LINK_STATE_XOFF, &dev->state);
675 }
676
677 static inline int netif_running(const struct net_device *dev)
678 {
679 return test_bit(__LINK_STATE_START, &dev->state);
680 }
681
682
683 /* Use this variant when it is known for sure that it
684 * is executing from interrupt context.
685 */
686 static inline void dev_kfree_skb_irq(struct sk_buff *skb)
687 {
688 if (atomic_dec_and_test(&skb->users)) {
689 struct softnet_data *sd;
690 unsigned long flags;
691
692 local_irq_save(flags);
693 sd = &__get_cpu_var(softnet_data);
694 skb->next = sd->completion_queue;
695 sd->completion_queue = skb;
696 raise_softirq_irqoff(NET_TX_SOFTIRQ);
697 local_irq_restore(flags);
698 }
699 }
700
701 /* Use this variant in places where it could be invoked
702 * either from interrupt or non-interrupt context.
703 */
704 extern void dev_kfree_skb_any(struct sk_buff *skb);
705
706 #define HAVE_NETIF_RX 1
707 extern int netif_rx(struct sk_buff *skb);
708 extern int netif_rx_ni(struct sk_buff *skb);
709 #define HAVE_NETIF_RECEIVE_SKB 1
710 extern int netif_receive_skb(struct sk_buff *skb);
711 extern int dev_valid_name(const char *name);
712 extern int dev_ioctl(unsigned int cmd, void __user *);
713 extern int dev_ethtool(struct ifreq *);
714 extern unsigned dev_get_flags(const struct net_device *);
715 extern int dev_change_flags(struct net_device *, unsigned);
716 extern int dev_change_name(struct net_device *, char *);
717 extern int dev_set_mtu(struct net_device *, int);
718 extern int dev_set_mac_address(struct net_device *,
719 struct sockaddr *);
720 extern int dev_hard_start_xmit(struct sk_buff *skb,
721 struct net_device *dev);
722
723 extern void dev_init(void);
724
725 extern int netdev_budget;
726
727 /* Called by rtnetlink.c:rtnl_unlock() */
728 extern void netdev_run_todo(void);
729
730 static inline void dev_put(struct net_device *dev)
731 {
732 atomic_dec(&dev->refcnt);
733 }
734
735 static inline void dev_hold(struct net_device *dev)
736 {
737 atomic_inc(&dev->refcnt);
738 }
739
740 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
741 * and _off may be called from IRQ context, but it is caller
742 * who is responsible for serialization of these calls.
743 *
744 * The name carrier is inappropriate, these functions should really be
745 * called netif_lowerlayer_*() because they represent the state of any
746 * kind of lower layer not just hardware media.
747 */
748
749 extern void linkwatch_fire_event(struct net_device *dev);
750
751 static inline int netif_carrier_ok(const struct net_device *dev)
752 {
753 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
754 }
755
756 extern void __netdev_watchdog_up(struct net_device *dev);
757
758 extern void netif_carrier_on(struct net_device *dev);
759
760 extern void netif_carrier_off(struct net_device *dev);
761
762 static inline void netif_dormant_on(struct net_device *dev)
763 {
764 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
765 linkwatch_fire_event(dev);
766 }
767
768 static inline void netif_dormant_off(struct net_device *dev)
769 {
770 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
771 linkwatch_fire_event(dev);
772 }
773
774 static inline int netif_dormant(const struct net_device *dev)
775 {
776 return test_bit(__LINK_STATE_DORMANT, &dev->state);
777 }
778
779
780 static inline int netif_oper_up(const struct net_device *dev) {
781 return (dev->operstate == IF_OPER_UP ||
782 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
783 }
784
785 /* Hot-plugging. */
786 static inline int netif_device_present(struct net_device *dev)
787 {
788 return test_bit(__LINK_STATE_PRESENT, &dev->state);
789 }
790
791 extern void netif_device_detach(struct net_device *dev);
792
793 extern void netif_device_attach(struct net_device *dev);
794
795 /*
796 * Network interface message level settings
797 */
798 #define HAVE_NETIF_MSG 1
799
800 enum {
801 NETIF_MSG_DRV = 0x0001,
802 NETIF_MSG_PROBE = 0x0002,
803 NETIF_MSG_LINK = 0x0004,
804 NETIF_MSG_TIMER = 0x0008,
805 NETIF_MSG_IFDOWN = 0x0010,
806 NETIF_MSG_IFUP = 0x0020,
807 NETIF_MSG_RX_ERR = 0x0040,
808 NETIF_MSG_TX_ERR = 0x0080,
809 NETIF_MSG_TX_QUEUED = 0x0100,
810 NETIF_MSG_INTR = 0x0200,
811 NETIF_MSG_TX_DONE = 0x0400,
812 NETIF_MSG_RX_STATUS = 0x0800,
813 NETIF_MSG_PKTDATA = 0x1000,
814 NETIF_MSG_HW = 0x2000,
815 NETIF_MSG_WOL = 0x4000,
816 };
817
818 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
819 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
820 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
821 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
822 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
823 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
824 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
825 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
826 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
827 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
828 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
829 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
830 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
831 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
832 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
833
834 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
835 {
836 /* use default */
837 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
838 return default_msg_enable_bits;
839 if (debug_value == 0) /* no output */
840 return 0;
841 /* set low N bits */
842 return (1 << debug_value) - 1;
843 }
844
845 /* Test if receive needs to be scheduled */
846 static inline int __netif_rx_schedule_prep(struct net_device *dev)
847 {
848 return !test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state);
849 }
850
851 /* Test if receive needs to be scheduled but only if up */
852 static inline int netif_rx_schedule_prep(struct net_device *dev)
853 {
854 return netif_running(dev) && __netif_rx_schedule_prep(dev);
855 }
856
857 /* Add interface to tail of rx poll list. This assumes that _prep has
858 * already been called and returned 1.
859 */
860
861 extern void __netif_rx_schedule(struct net_device *dev);
862
863 /* Try to reschedule poll. Called by irq handler. */
864
865 static inline void netif_rx_schedule(struct net_device *dev)
866 {
867 if (netif_rx_schedule_prep(dev))
868 __netif_rx_schedule(dev);
869 }
870
871 /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete().
872 * Do not inline this?
873 */
874 static inline int netif_rx_reschedule(struct net_device *dev, int undo)
875 {
876 if (netif_rx_schedule_prep(dev)) {
877 unsigned long flags;
878
879 dev->quota += undo;
880
881 local_irq_save(flags);
882 list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
883 __raise_softirq_irqoff(NET_RX_SOFTIRQ);
884 local_irq_restore(flags);
885 return 1;
886 }
887 return 0;
888 }
889
890 /* Remove interface from poll list: it must be in the poll list
891 * on current cpu. This primitive is called by dev->poll(), when
892 * it completes the work. The device cannot be out of poll list at this
893 * moment, it is BUG().
894 */
895 static inline void netif_rx_complete(struct net_device *dev)
896 {
897 unsigned long flags;
898
899 local_irq_save(flags);
900 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
901 list_del(&dev->poll_list);
902 smp_mb__before_clear_bit();
903 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
904 local_irq_restore(flags);
905 }
906
907 static inline void netif_poll_disable(struct net_device *dev)
908 {
909 while (test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state))
910 /* No hurry. */
911 schedule_timeout_interruptible(1);
912 }
913
914 static inline void netif_poll_enable(struct net_device *dev)
915 {
916 smp_mb__before_clear_bit();
917 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
918 }
919
920 /* same as netif_rx_complete, except that local_irq_save(flags)
921 * has already been issued
922 */
923 static inline void __netif_rx_complete(struct net_device *dev)
924 {
925 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
926 list_del(&dev->poll_list);
927 smp_mb__before_clear_bit();
928 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
929 }
930
931 static inline void netif_tx_lock(struct net_device *dev)
932 {
933 spin_lock(&dev->_xmit_lock);
934 dev->xmit_lock_owner = smp_processor_id();
935 }
936
937 static inline void netif_tx_lock_bh(struct net_device *dev)
938 {
939 spin_lock_bh(&dev->_xmit_lock);
940 dev->xmit_lock_owner = smp_processor_id();
941 }
942
943 static inline int netif_tx_trylock(struct net_device *dev)
944 {
945 int ok = spin_trylock(&dev->_xmit_lock);
946 if (likely(ok))
947 dev->xmit_lock_owner = smp_processor_id();
948 return ok;
949 }
950
951 static inline void netif_tx_unlock(struct net_device *dev)
952 {
953 dev->xmit_lock_owner = -1;
954 spin_unlock(&dev->_xmit_lock);
955 }
956
957 static inline void netif_tx_unlock_bh(struct net_device *dev)
958 {
959 dev->xmit_lock_owner = -1;
960 spin_unlock_bh(&dev->_xmit_lock);
961 }
962
963 static inline void netif_tx_disable(struct net_device *dev)
964 {
965 netif_tx_lock_bh(dev);
966 netif_stop_queue(dev);
967 netif_tx_unlock_bh(dev);
968 }
969
970 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
971
972 extern void ether_setup(struct net_device *dev);
973
974 /* Support for loadable net-drivers */
975 extern struct net_device *alloc_netdev(int sizeof_priv, const char *name,
976 void (*setup)(struct net_device *));
977 extern int register_netdev(struct net_device *dev);
978 extern void unregister_netdev(struct net_device *dev);
979 /* Functions used for multicast support */
980 extern void dev_mc_upload(struct net_device *dev);
981 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
982 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
983 extern void dev_mc_discard(struct net_device *dev);
984 extern void dev_set_promiscuity(struct net_device *dev, int inc);
985 extern void dev_set_allmulti(struct net_device *dev, int inc);
986 extern void netdev_state_change(struct net_device *dev);
987 extern void netdev_features_change(struct net_device *dev);
988 /* Load a device via the kmod */
989 extern void dev_load(const char *name);
990 extern void dev_mcast_init(void);
991 extern int netdev_max_backlog;
992 extern int weight_p;
993 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
994 extern int skb_checksum_help(struct sk_buff *skb);
995 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
996 #ifdef CONFIG_BUG
997 extern void netdev_rx_csum_fault(struct net_device *dev);
998 #else
999 static inline void netdev_rx_csum_fault(struct net_device *dev)
1000 {
1001 }
1002 #endif
1003 /* rx skb timestamps */
1004 extern void net_enable_timestamp(void);
1005 extern void net_disable_timestamp(void);
1006
1007 #ifdef CONFIG_PROC_FS
1008 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
1009 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
1010 extern void dev_seq_stop(struct seq_file *seq, void *v);
1011 #endif
1012
1013 extern void linkwatch_run_queue(void);
1014
1015 static inline int net_gso_ok(int features, int gso_type)
1016 {
1017 int feature = gso_type << NETIF_F_GSO_SHIFT;
1018 return (features & feature) == feature;
1019 }
1020
1021 static inline int skb_gso_ok(struct sk_buff *skb, int features)
1022 {
1023 return net_gso_ok(features, skb_shinfo(skb)->gso_type);
1024 }
1025
1026 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1027 {
1028 return skb_is_gso(skb) &&
1029 (!skb_gso_ok(skb, dev->features) ||
1030 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
1031 }
1032
1033 /* On bonding slaves other than the currently active slave, suppress
1034 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1035 * ARP on active-backup slaves with arp_validate enabled.
1036 */
1037 static inline int skb_bond_should_drop(struct sk_buff *skb)
1038 {
1039 struct net_device *dev = skb->dev;
1040 struct net_device *master = dev->master;
1041
1042 if (master &&
1043 (dev->priv_flags & IFF_SLAVE_INACTIVE)) {
1044 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
1045 skb->protocol == __constant_htons(ETH_P_ARP))
1046 return 0;
1047
1048 if (master->priv_flags & IFF_MASTER_ALB) {
1049 if (skb->pkt_type != PACKET_BROADCAST &&
1050 skb->pkt_type != PACKET_MULTICAST)
1051 return 0;
1052 }
1053 if (master->priv_flags & IFF_MASTER_8023AD &&
1054 skb->protocol == __constant_htons(ETH_P_SLOW))
1055 return 0;
1056
1057 return 1;
1058 }
1059 return 0;
1060 }
1061
1062 #endif /* __KERNEL__ */
1063
1064 #endif /* _LINUX_DEV_H */
kernel source for telekom puls (alcatel/mediatek)