ether.h

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/* ether.h */

/* Ethernet packet format:

 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 |  Dest. MAC (6)  |  Src. MAC (6)   |Type (2)|      Data (46-1500)...   |
 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/

#define ETH_ADDR_LEN    6   /* Length of Ethernet (MAC) address */
typedef unsigned char   Eaddr[ETH_ADDR_LEN];/* a physical Ethernet address*/

/* Ethernet packet header */

struct  etherPkt {
    byte    dst[ETH_ADDR_LEN];  /* Destination Mac address  */
    byte    src[ETH_ADDR_LEN];  /* Source Mac address       */
    uint16  type;           /* Ether type field     */
    byte    data[1];        /* Packet payload       */
};

#define ETH_HDR_LEN     14  /* Length of Ethernet packet    */
                    /*  header          */

/* Ethernet DMA buffer sizes */

#define ETH_MTU         1500    /* Maximum transmission unit    */
#define ETH_VLAN_LEN        4   /* Length of Ethernet vlan tag  */
#define ETH_CRC_LEN     4   /* Length of CRC on Ethernet    */
                    /*  frame           */

#define ETH_MAX_PKT_LEN ( ETH_HDR_LEN + ETH_VLAN_LEN + ETH_MTU )

#define ETH_BUF_SIZE        1518    /* 1500 MTU + 14 ETH Header + 4 bytes optional VLAN Tagging */

/* State of the Ethernet interface */

#define ETH_STATE_FREE      0   /* control block is unused  */
#define ETH_STATE_DOWN      1   /* interface is currently   */
                    /*  inactive        */
#define ETH_STATE_UP        2   /* interface is currently active*/

/* Ethernet device control functions */

#define ETH_CTRL_GET_MAC        1   /* Get the MAC for this device  */

/* Ethernet multicast */

#define ETH_NUM_MCAST       32     /* Max number of multicast addresses*/

/* Ehternet NIC type */

#define ETH_TYPE_3C905C     1
#define ETH_TYPE_E1000E     2

#define ETH_PHY_CTLREG  0
#define ETH_PHY_STATREG 1

#define ETH_PHY_CTLREG_RESET    0x8000
#define ETH_PHY_CTLREG_SM   0x2040  /* Speed Mask   */
#define ETH_PHY_10M     0x0000
#define ETH_PHY_100M        0x2000
#define ETH_PHY_1000M       0x0040
#define ETH_PHY_CTLREG_FD   0x0100

#define ETH_PHY_STATREG_LINK    0x0004

struct  ethcblk {
    byte    state;      /* ETH_STATE_... as defined above   */
    struct  dentry  *phy;   /* physical eth device for Tx DMA   */
    byte    type;       /* NIC type_... as defined above    */

    /* Pointers to associated structures */

    struct  dentry  *dev;   /* address in device switch table   */
    void    *csr;       /* addr.of control and status regs. */
    uint32  pcidev;     /* PCI device number            */
    uint32  iobase;     /* I/O base from config         */
    uint32  flashbase;      /* flash base from config           */
        uint32  membase;    /* memory base for device from config   */

    void    *rxRing;    /* ptr to array of recv ring descriptors*/
    void    *rxBufs;    /* ptr to Rx packet buffers in memory   */
    uint32  rxHead;     /* Index of current head of Rx ring */
    uint32  rxTail;     /* Index of current tail of Rx ring */
    uint32  rxRingSize; /* size of Rx ring descriptor array */
    uint32  rxIrq;      /* Count of Rx interrupt requests       */

    void    *txRing;    /* ptr to array of xmit ring descriptors*/
    void    *txBufs;    /* ptr to Tx packet buffers in memory   */
    uint32  txHead;     /* Index of current head of Tx ring */
    uint32  txTail;     /* Index of current tail of Tx ring */
    uint32  txRingSize; /* size of Tx ring descriptor array */
    uint32  txIrq;      /* Count of Tx interrupt requests       */

    byte    devAddress[ETH_ADDR_LEN];/* MAC address         */

    uint8   addrLen;    /* Hardware address length          */
    uint16  mtu;            /* Maximum transmission unit (payload)  */

    uint32  errors;     /* Number of Ethernet errors        */
    sid32   isem;       /* Semaphore for Ethernet input     */
    sid32   osem;       /* Semaphore for Ethernet output    */
    uint16  istart;     /* Index of next packet in the ring     */

    int16   inPool;     /* Buffer pool ID for input buffers     */
    int16   outPool;    /* Buffer pool ID for output buffers    */

    int16   proms;      /* nonzero => promiscuous mode      */

    int16   ed_mcset;       /* nonzero => multicast reception set   */
    int16   ed_mcc;     /* count of multicast addresses     */
        Eaddr   ed_mca[ETH_NUM_MCAST];/* array of multicast addrs   */
};

extern  struct  ethcblk ethertab[]; /* array of control blocks      */