lan.c

基于psos操作系统的ns8390驱动源码

    /*-----------------------------------------------------------------*/
    if (broadcats)
        MG_stat.innucastpkts++;
    else
        MG_stat.inucastpkts++;
    
    #if BSP_LITTLE_ENDIAN
        /*-------------------------------------------------------------*/
        /* Add code here to adjust packet type to network order        */
        /* (BIG ENDIAN).                                               */
        /*-------------------------------------------------------------*/
    #endif
 
    /*-----------------------------------------------------------------*/
    /* Attach packet to a message block.                               */
    /* The frtn struct will be used when the mblk is freed.            */
    /* Lower the interrupt mask to allow interrupts while we           */
    /* get the message buffer.                                         */
    /*-----------------------------------------------------------------*/
    frtn.free_func = (void (*)())ni_retpkb;
    frtn.free_arg = (char *) pkb + DATA_OFFSET;
    splx(imask);
    if ((mblkPtr = Ni_funcs.esballoc((UCHAR *)frame,
             (count), 0, &frtn)) == 0)
        {

        /*-------------------------------------------------------------*/
        /* There is no message block to attach the packet to so        */
        /* it will be droped. Set return_pkb so the packet will        */
        /* be added back to the Receive Frame Area.                    */
        /*-------------------------------------------------------------*/
        return_pkb = 1;
        }
    else
        {
 
        /*-------------------------------------------------------------*/
        /* Set the message blocks write pointer to point to the        */
        /* end of the packets data area.                               */
        /*-------------------------------------------------------------*/
        mblkPtr->b_wptr += (pkb->count & 0x3fff) - 14;

        /*-------------------------------------------------------------*/
        /* Call the Announce_Packet function to send the packet to the */
        /* protocol layer.                                             */
        /*-------------------------------------------------------------*/
        psos_up_flag = (*ap_addr)(type,
                        (char *)mblkPtr,
                        (count & 0x3FFF),
                        if_num,
                        (char *)src_addr,
                        (char *)dist_addr);
 
        /*---------------------------------------------------------*/
        /* Raise interrupt mask to protect remain section.         */
        /*---------------------------------------------------------*/
        imask = splx(MAX_ILEV);

        }
    } 
/*---------------------------------------------------------------------*/
/* Add code here to clear any interrupt pending state of the chip      */
/*---------------------------------------------------------------------*/

return psos_up_flag;
}

/***********************************************************************/
/* ni_pna_init: This function is called from the ni_ioctl function.    */
/*              It is used to tell the driver that pna has             */
/*              re/initialize.                                         */
/*                                                                     */
/*                                                                     */
/*      INPUTS: NONE                                                   */
/*                                                                     */
/*     RETURNS: NONE                                                   */
/*     OUTPUTS: NONE                                                   */
/*     NOTE(S): This function needs to do what ever is necessary to    */
/*              reinitialize the driver to a startup state. All        */
/*              receive and transmit buffers must be flushed.          */
/*                                                                     */
/***********************************************************************/
void ni_pna_init(void)
{

/*---------------------------------------------------------------------*/
/* Add code here                                                       */
/*---------------------------------------------------------------------*/

}

/***********************************************************************/
/* get_lan_indiscards: used by MIB to get the number of packets that   */
/*               were discarded because of lack of resources.          */
/*                                                                     */
/*      INPUTS: NONE:                                                  */
/*                                                                     */
/*     RETURNS: number of discards  because of lack of resources       */
/*     OUTPUTS: NONE                                                   */
/*     NOTE(S): This function is called from lan_mib.c                 */
/*                                                                     */
/***********************************************************************/
long get_lan_indiscards(void)
{

/*---------------------------------------------------------------------*/
/* Add code here to get the number of packets discarded because of     */
/* lack of resources such as no message blocks.                        */
/*---------------------------------------------------------------------*/

return((long)0);
}
 
/***********************************************************************/
/* get_lan_inerrors: used by MIB to get number of packets that were    */
/*             discarded bacause of errors.                            */
/*                                                                     */
/*                                                                     */
/*      INPUTS: NONE:                                                  */
/*                                                                     */
/*     RETURNS: number of packets discarded because of errors          */
/*     OUTPUTS: NONE                                                   */
/*     NOTE(S): This function is called from lan_mib.c                 */
/*                                                                     */
/***********************************************************************/
long get_lan_inerrors(void)
{

/*---------------------------------------------------------------------*/
/* Add code here to get the number of incomming packet  that were       */
/* discarded because of errors such as overruns.                       */
/*---------------------------------------------------------------------*/

return((long)0);
}

/***********************************************************************/
/* get_lan_outerrors: used by MIB to get number of out packets that    */
/*  were discarded bacause of errors.                                  */
/*                                                                     */
/*                                                                     */
/*      INPUTS: NONE:                                                  */
/*                                                                     */
/*     RETURNS: number of packets discarded because of errors          */
/*     OUTPUTS: NONE                                                   */
/*     NOTE(S): This function is called from lan_mib.c                 */
/*                                                                     */
/***********************************************************************/
long get_lan_outerrors(void)
{

/*---------------------------------------------------------------------*/
/* Add code here to get the number of out going packets that were      */
/* discarded due to errors.                                            */
/*---------------------------------------------------------------------*/

return((long)0);
}
 
/***********************************************************************/
/* get_lan_outdiscards: used by MIB to get the number of packets out */
/*                      that were discarded because of lack of         */
/*                      resources.                                     */
/*                                                                     */
/*      INPUTS: NONE:                                                  */
/*                                                                     */
/*     RETURNS: number of discards  because of lack of resources       */
/*     OUTPUTS: NONE                                                   */
/*     NOTE(S): This function is called from lan_mib.c                 */
/*                                                                     */
/***********************************************************************/
long get_lan_outdiscards(void)
{

/*---------------------------------------------------------------------*/
/* Add code here to get the number of out going packets that were      */
/* discarded due to lack of resources such as transmit queue full.     */
/*---------------------------------------------------------------------*/

return((long)0);
}

/***********************************************************************/
/* clear: clear a memory area.                                         */
/*                                                                     */
/*      INPUTS: pointer to start of memory to be cleared               */
/*              size of memory to be cleared                           */
/*                                                                     */
/*     RETURNS: NONE                                                   */
/*     OUTPUTS: NONE                                                   */
/*     NOTE(S): Simple clear memory function                           */
/*                                                                     */
/***********************************************************************/
static void clear(volatile void *ptr, ULONG size)
{
while (size--) *((char *)ptr)++ = 0;
}