ARM-Linux驱动--DM9000网卡驱动分析（一）

、net_device

关于net_device一个非常庞大的结构体，定义在/inlcude/linux/netdevice.h中

如下：

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struct net_device {

char name[IFNAMSIZ];

struct pm_qos_request_list *pm_qos_req;

struct hlist_node name_hlist;

char *ifalias;

unsigned long mem_end;

unsigned long mem_start;

unsigned long base_addr;

unsigned int irq;

unsigned char if_port;

unsigned char dma;

unsigned long state;

struct list_head dev_list;

struct list_head napi_list;

struct list_head unreg_list;

unsigned long features;

#define NETIF_F_SG 1

#define NETIF_F_IP_CSUM 2

#define NETIF_F_NO_CSUM 4

#define NETIF_F_HW_CSUM 8

#define NETIF_F_IPV6_CSUM 16

#define NETIF_F_HIGHDMA 32

#define NETIF_F_FRAGLIST 64

#define NETIF_F_HW_VLAN_TX 128

#define NETIF_F_HW_VLAN_RX 256

#define NETIF_F_HW_VLAN_FILTER 512

#define NETIF_F_VLAN_CHALLENGED 1024

#define NETIF_F_GSO 2048

#define NETIF_F_LLTX 4096

#define NETIF_F_NETNS_LOCAL 8192

#define NETIF_F_GRO 16384

#define NETIF_F_LRO 32768

#define NETIF_F_FCOE_CRC (1 < 24)

#define NETIF_F_SCTP_CSUM (1 < 25)

#define NETIF_F_FCOE_MTU (1 < 26)

#define NETIF_F_NTUPLE (1 < 27)

#define NETIF_F_RXHASH (1 < 28)

#define NETIF_F_GSO_SHIFT 16

#define NETIF_F_GSO_MASK 0x00ff0000

#define NETIF_F_TSO (SKB_GSO_TCPV4 < NETIF_F_GSO_SHIFT)

#define NETIF_F_UFO (SKB_GSO_UDP < NETIF_F_GSO_SHIFT)

#define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY < NETIF_F_GSO_SHIFT)

#define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN < NETIF_F_GSO_SHIFT)

#define NETIF_F_TSO6 (SKB_GSO_TCPV6 < NETIF_F_GSO_SHIFT)

#define NETIF_F_FSO (SKB_GSO_FCOE < NETIF_F_GSO_SHIFT)

#define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)

#define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)

#define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)

#define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)

#define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)

#define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \

NETIF_F_SG | NETIF_F_HIGHDMA | \

NETIF_F_FRAGLIST)

int ifindex;

int iflink;

struct net_device_stats stats;

#ifdef CONFIG_WIRELESS_EXT

const struct iw_handler_def * wireless_handlers;

struct iw_public_data * wireless_data;

#endif

const struct net_device_ops *netdev_ops;

const struct ethtool_ops *ethtool_ops;

const struct header_ops *header_ops;

unsigned int flags;

unsigned short gflags;

unsigned short priv_flags;

unsigned short padded;

unsigned char operstate;

unsigned char link_mode;

unsigned int mtu;

unsigned short type;

unsigned short hard_header_len;

unsigned short needed_headroom;

unsigned short needed_tailroom;

struct net_device *master;

unsigned char perm_addr[MAX_ADDR_LEN];

unsigned char addr_len;

unsigned short dev_id;

spinlock_t addr_list_lock;

struct netdev_hw_addr_list uc;

struct netdev_hw_addr_list mc;

int uc_promisc;

unsigned int promiscuity;

unsigned int allmulti;

#ifdef CONFIG_NET_DSA

void *dsa_ptr;

#endif

void *atalk_ptr;

void *ip_ptr;

void *dn_ptr;

void *ip6_ptr;

void *ec_ptr;

void *ax25_ptr;

struct wireless_dev *ieee80211_ptr;

unsigned long last_rx;

unsigned char *dev_addr;

struct netdev_hw_addr_list dev_addrs;

unsigned char broadcast[MAX_ADDR_LEN];

#ifdef CONFIG_RPS

struct kset *queues_kset;

struct netdev_rx_queue *_rx;