netdevice.h

Axis 221 camera embedded programing interface

	/* Instance data managed by the core of Wireless Extensions. */
	struct iw_public_data *	wireless_data;

	const struct ethtool_ops *ethtool_ops;

	/*
	 * This marks the end of the "visible" part of the structure. All
	 * fields hereafter are internal to the system, and may change at
	 * will (read: may be cleaned up at will).
	 */


	unsigned int		flags;	/* interface flags (a la BSD)	*/
	unsigned short		gflags;
        unsigned short          priv_flags; /* Like 'flags' but invisible to userspace. */
	unsigned short		padded;	/* How much padding added by alloc_netdev() */

	unsigned char		operstate; /* RFC2863 operstate */
	unsigned char		link_mode; /* mapping policy to operstate */

	unsigned		mtu;	/* interface MTU value		*/
	unsigned short		type;	/* interface hardware type	*/
	unsigned short		hard_header_len;	/* hardware hdr length	*/

	struct net_device	*master; /* Pointer to master device of a group,
					  * which this device is member of.
					  */

	/* Interface address info. */
	unsigned char		perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
	unsigned char		addr_len;	/* hardware address length	*/
	unsigned short          dev_id;		/* for shared network cards */

	struct dev_mc_list	*mc_list;	/* Multicast mac addresses	*/
	int			mc_count;	/* Number of installed mcasts	*/
	int			promiscuity;
	int			allmulti;


	/* Protocol specific pointers */
	
	void 			*atalk_ptr;	/* AppleTalk link 	*/
	void			*ip_ptr;	/* IPv4 specific data	*/  
	void                    *dn_ptr;        /* DECnet specific data */
	void                    *ip6_ptr;       /* IPv6 specific data */
	void			*ec_ptr;	/* Econet specific data	*/
	void			*ax25_ptr;	/* AX.25 specific data */

/*
 * Cache line mostly used on receive path (including eth_type_trans())
 */
	struct list_head	poll_list ____cacheline_aligned_in_smp;
					/* Link to poll list	*/

	int			(*poll) (struct net_device *dev, int *quota);
	int			quota;
	int			weight;
	unsigned long		last_rx;	/* Time of last Rx	*/
	/* Interface address info used in eth_type_trans() */
	unsigned char		dev_addr[MAX_ADDR_LEN];	/* hw address, (before bcast 
							because most packets are unicast) */

	unsigned char		broadcast[MAX_ADDR_LEN];	/* hw bcast add	*/

/*
 * Cache line mostly used on queue transmit path (qdisc)
 */
	/* device queue lock */
	spinlock_t		queue_lock ____cacheline_aligned_in_smp;
	struct Qdisc		*qdisc;
	struct Qdisc		*qdisc_sleeping;
	struct list_head	qdisc_list;
	unsigned long		tx_queue_len;	/* Max frames per queue allowed */

	/* Partially transmitted GSO packet. */
	struct sk_buff		*gso_skb;

	/* ingress path synchronizer */
	spinlock_t		ingress_lock;
	struct Qdisc		*qdisc_ingress;

/*
 * One part is mostly used on xmit path (device)
 */
	/* hard_start_xmit synchronizer */
	spinlock_t		_xmit_lock ____cacheline_aligned_in_smp;
	/* cpu id of processor entered to hard_start_xmit or -1,
	   if nobody entered there.
	 */
	int			xmit_lock_owner;
	void			*priv;	/* pointer to private data	*/
	int			(*hard_start_xmit) (struct sk_buff *skb,
						    struct net_device *dev);
	/* These may be needed for future network-power-down code. */
	unsigned long		trans_start;	/* Time (in jiffies) of last Tx	*/

	int			watchdog_timeo; /* used by dev_watchdog() */
	struct timer_list	watchdog_timer;

/*
 * refcnt is a very hot point, so align it on SMP
 */
	/* Number of references to this device */
	atomic_t		refcnt ____cacheline_aligned_in_smp;

	/* delayed register/unregister */
	struct list_head	todo_list;
	/* device index hash chain */
	struct hlist_node	index_hlist;

	/* register/unregister state machine */
	enum { NETREG_UNINITIALIZED=0,
	       NETREG_REGISTERED,	/* completed register_netdevice */
	       NETREG_UNREGISTERING,	/* called unregister_netdevice */
	       NETREG_UNREGISTERED,	/* completed unregister todo */
	       NETREG_RELEASED,		/* called free_netdev */
	} reg_state;

	/* Called after device is detached from network. */
	void			(*uninit)(struct net_device *dev);
	/* Called after last user reference disappears. */
	void			(*destructor)(struct net_device *dev);

	/* Pointers to interface service routines.	*/
	int			(*open)(struct net_device *dev);
	int			(*stop)(struct net_device *dev);
#define HAVE_NETDEV_POLL
	int			(*hard_header) (struct sk_buff *skb,
						struct net_device *dev,
						unsigned short type,
						void *daddr,
						void *saddr,
						unsigned len);
	int			(*rebuild_header)(struct sk_buff *skb);
#define HAVE_MULTICAST			 
	void			(*set_multicast_list)(struct net_device *dev);
#define HAVE_SET_MAC_ADDR  		 
	int			(*set_mac_address)(struct net_device *dev,
						   void *addr);
#define HAVE_PRIVATE_IOCTL
	int			(*do_ioctl)(struct net_device *dev,
					    struct ifreq *ifr, int cmd);
#define HAVE_SET_CONFIG
	int			(*set_config)(struct net_device *dev,
					      struct ifmap *map);
#define HAVE_HEADER_CACHE
	int			(*hard_header_cache)(struct neighbour *neigh,
						     struct hh_cache *hh);
	void			(*header_cache_update)(struct hh_cache *hh,
						       struct net_device *dev,
						       unsigned char *  haddr);
#define HAVE_CHANGE_MTU
	int			(*change_mtu)(struct net_device *dev, int new_mtu);

#define HAVE_TX_TIMEOUT
	void			(*tx_timeout) (struct net_device *dev);

	void			(*vlan_rx_register)(struct net_device *dev,
						    struct vlan_group *grp);
	void			(*vlan_rx_add_vid)(struct net_device *dev,
						   unsigned short vid);
	void			(*vlan_rx_kill_vid)(struct net_device *dev,
						    unsigned short vid);

	int			(*hard_header_parse)(struct sk_buff *skb,
						     unsigned char *haddr);
	int			(*neigh_setup)(struct net_device *dev, struct neigh_parms *);
#ifdef CONFIG_NETPOLL
	struct netpoll_info	*npinfo;
#endif
#ifdef CONFIG_NET_POLL_CONTROLLER
	void                    (*poll_controller)(struct net_device *dev);
#endif

	/* bridge stuff */
	struct net_bridge_port	*br_port;

	/* class/net/name entry */
	struct class_device	class_dev;
	/* space for optional statistics and wireless sysfs groups */
	struct attribute_group  *sysfs_groups[3];
};

#define	NETDEV_ALIGN		32
#define	NETDEV_ALIGN_CONST	(NETDEV_ALIGN - 1)

static inline void *netdev_priv(struct net_device *dev)
{
	return (char *)dev + ((sizeof(struct net_device)
					+ NETDEV_ALIGN_CONST)
				& ~NETDEV_ALIGN_CONST);
}

#define SET_MODULE_OWNER(dev) do { } while (0)
/* Set the sysfs physical device reference for the network logical device
 * if set prior to registration will cause a symlink during initialization.
 */
#define SET_NETDEV_DEV(net, pdev)	((net)->class_dev.dev = (pdev))

struct packet_type {
	__be16			type;	/* This is really htons(ether_type). */
	struct net_device	*dev;	/* NULL is wildcarded here	     */
	int			(*func) (struct sk_buff *,
					 struct net_device *,
					 struct packet_type *,
					 struct net_device *);
	struct sk_buff		*(*gso_segment)(struct sk_buff *skb,
						int features);
	int			(*gso_send_check)(struct sk_buff *skb);
	void			*af_packet_priv;
	struct list_head	list;
};

#include <linux/interrupt.h>
#include <linux/notifier.h>

extern struct net_device		loopback_dev;		/* The loopback */
extern struct net_device		*dev_base;		/* All devices */
extern rwlock_t				dev_base_lock;		/* Device list lock */

extern int 			netdev_boot_setup_check(struct net_device *dev);
extern unsigned long		netdev_boot_base(const char *prefix, int unit);
extern struct net_device    *dev_getbyhwaddr(unsigned short type, char *hwaddr);
extern struct net_device *dev_getfirstbyhwtype(unsigned short type);
extern void		dev_add_pack(struct packet_type *pt);
extern void		dev_remove_pack(struct packet_type *pt);
extern void		__dev_remove_pack(struct packet_type *pt);

extern struct net_device	*dev_get_by_flags(unsigned short flags,
						  unsigned short mask);
extern struct net_device	*dev_get_by_name(const char *name);
extern struct net_device	*__dev_get_by_name(const char *name);
extern int		dev_alloc_name(struct net_device *dev, const char *name);
extern int		dev_open(struct net_device *dev);
extern int		dev_close(struct net_device *dev);
extern int		dev_queue_xmit(struct sk_buff *skb);
extern int		register_netdevice(struct net_device *dev);
extern int		unregister_netdevice(struct net_device *dev);
extern void		free_netdev(struct net_device *dev);
extern void		synchronize_net(void);
extern int 		register_netdevice_notifier(struct notifier_block *nb);
extern int		unregister_netdevice_notifier(struct notifier_block *nb);
extern int		call_netdevice_notifiers(unsigned long val, void *v);
extern struct net_device	*dev_get_by_index(int ifindex);
extern struct net_device	*__dev_get_by_index(int ifindex);
extern int		dev_restart(struct net_device *dev);
#ifdef CONFIG_NETPOLL_TRAP
extern int		netpoll_trap(void);
#endif

typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
extern int		register_gifconf(unsigned int family, gifconf_func_t * gifconf);
static inline int unregister_gifconf(unsigned int family)
{
	return register_gifconf(family, NULL);
}

/*
 * Incoming packets are placed on per-cpu queues so that
 * no locking is needed.
 */

struct softnet_data
{
	struct net_device	*output_queue;
	struct sk_buff_head	input_pkt_queue;
	struct list_head	poll_list;
	struct sk_buff		*completion_queue;

	struct net_device	backlog_dev;	/* Sorry. 8) */
#ifdef CONFIG_NET_DMA
	struct dma_chan		*net_dma;
#endif
};

DECLARE_PER_CPU(struct softnet_data,softnet_data);

#define HAVE_NETIF_QUEUE

extern void __netif_schedule(struct net_device *dev);

static inline void netif_schedule(struct net_device *dev)
{
	if (!test_bit(__LINK_STATE_XOFF, &dev->state))
		__netif_schedule(dev);
}

static inline void netif_start_queue(struct net_device *dev)
{
	clear_bit(__LINK_STATE_XOFF, &dev->state);
}

static inline void netif_wake_queue(struct net_device *dev)
{
#ifdef CONFIG_NETPOLL_TRAP
	if (netpoll_trap())
		return;
#endif
	if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state))
		__netif_schedule(dev);
}

static inline void netif_stop_queue(struct net_device *dev)
{
#ifdef CONFIG_NETPOLL_TRAP
	if (netpoll_trap())
		return;
#endif
	set_bit(__LINK_STATE_XOFF, &dev->state);
}

static inline int netif_queue_stopped(const struct net_device *dev)
{
	return test_bit(__LINK_STATE_XOFF, &dev->state);
}

static inline int netif_running(const struct net_device *dev)
{
	return test_bit(__LINK_STATE_START, &dev->state);
}


/* Use this variant when it is known for sure that it
 * is executing from interrupt context.
 */
static inline void dev_kfree_skb_irq(struct sk_buff *skb)
{
	if (atomic_dec_and_test(&skb->users)) {
		struct softnet_data *sd;
		unsigned long flags;

		local_irq_save(flags);
		sd = &__get_cpu_var(softnet_data);
		skb->next = sd->completion_queue;
		sd->completion_queue = skb;
		raise_softirq_irqoff(NET_TX_SOFTIRQ);
		local_irq_restore(flags);
	}
}

/* Use this variant in places where it could be invoked
 * either from interrupt or non-interrupt context.
 */
extern void dev_kfree_skb_any(struct sk_buff *skb);

#define HAVE_NETIF_RX 1
extern int		netif_rx(struct sk_buff *skb);
extern int		netif_rx_ni(struct sk_buff *skb);
#define HAVE_NETIF_RECEIVE_SKB 1
extern int		netif_receive_skb(struct sk_buff *skb);
extern int		dev_valid_name(const char *name);
extern int		dev_ioctl(unsigned int cmd, void __user *);
extern int		dev_ethtool(struct ifreq *);