/*
* The DEVICE structure.
* Actually, this whole structure is a big mistake. It mixes I/O
* data with strictly "high-level" data, and it has to know about
* almost every data structure used in the INET module.
*/
struct device
{ /*
* This is the first field of the "visible" part of this structure
* (i.e. as seen by users in the "Space.c" file). It is the name
* the interface.
*/
char *name; /* I/O specific fields - FIXME: Merge these and struct ifmap into one */
unsigned long rmem_end; /* shmem "recv" end */
unsigned long rmem_start; /* shmem "recv" start */
unsigned long mem_end; /* sahared mem end */
unsigned long mem_start; /* shared mem start */
unsigned long base_addr; /* device I/O address */
unsigned char irq; /* device IRQ number */ /* Low-level status flags. */
volatile unsigned char start, /* start an operation */
tbusy, /* transmitter busy */
interrupt; /* interrupt arrived */ struct device *next; /* The device initialization function. Called only once. */
int (*init)(struct device *dev); /* Some hardware also needs these fields, but they are not part of the
usual set specified in Space.c. */
unsigned char if_port; /* Selectable AUI, TP,..*/
unsigned char dma; /* DMA channel */ struct enet_statistics* (*get_stats)(struct device *dev); /*
* 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).
*/ /* These may be needed for future network-power-down code. */
unsigned long trans_start; /* Time (in jiffies) of last Tx */
unsigned long last_rx; /* Time of last Rx */ unsigned short flags; /* interface flags (a la BSD) */
unsigned short family; /* address family ID (AF_INET) */
unsigned short metric; /* routing metric (not used) */
unsigned short mtu; /* interface MTU value */
unsigned short type; /* interface hardware type */
unsigned short hard_header_len; /* hardware hdr length */
void *priv; /* pointer to private data */ /* Interface address info. */
unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address */
unsigned char addr_len; /* hardware address length */
unsigned long pa_addr; /* protocol address */
unsigned long pa_brdaddr; /* protocol broadcast addr */
unsigned long pa_dstaddr; /* protocol P-P other side addr */
unsigned long pa_mask; /* protocol netmask */
unsigned short pa_alen; /* protocol address length */ struct dev_mc_list *mc_list; /* Multicast mac addresses */
int mc_count; /* Number of installed mcasts */
struct ip_mc_list *ip_mc_list; /* IP multicast filter chain */
/* For load balancing driver pair support */
unsigned long pkt_queue; /* Packets queued */
struct device *slave; /* Slave device */
/* Pointer to the interface buffers. */
struct sk_buff_head buffs[DEV_NUMBUFFS]; /* Pointers to interface service routines. */
int (*open)(struct device *dev);
int (*stop)(struct device *dev);
int (*hard_start_xmit) (struct sk_buff *skb,
struct device *dev);
int (*hard_header) (unsigned char *buff,
struct device *dev,
unsigned short type,
void *daddr,
void *saddr,
unsigned len,
struct sk_buff *skb);
int (*rebuild_header)(void *eth, struct device *dev,
unsigned long raddr, struct sk_buff *skb);
unsigned short (*type_trans) (struct sk_buff *skb,
struct device *dev);
#define HAVE_MULTICAST
void (*set_multicast_list)(struct device *dev,
int num_addrs, void *addrs);
#define HAVE_SET_MAC_ADDR
int (*set_mac_address)(struct device *dev, void *addr);
#define HAVE_PRIVATE_IOCTL
int (*do_ioctl)(struct device *dev, struct ifreq *ifr, int cmd);
#define HAVE_SET_CONFIG
int (*set_config)(struct device *dev, struct ifmap *map);
}; | 
