ans_hw.c

COPE the first practical network coding scheme which is developped on click

      DeviceControlReg = E1000_READ_REG(Ctrl);
      DeviceControlReg |= E1000_CTRL_VME;
      E1000_WRITE_REG(Ctrl, DeviceControlReg);


      //**********************************************************
      // Set the VLAN Filter Table Array (VFTA) for the VLANs
      // that the adapter is a member of.  The VTFA is 128-32 bit
      // registers that we treat like a 4096 bit array (just like 
      // the MTA).  A .1q VLAN ID is 12 bits.  The upper 7 bits
      // will determine the VTFA register and lower 5 bits 
      // determine what bit in the register should be set.  
      //**********************************************************
	  if (iANSdata->vlan_filtering_mode == IANS_VLAN_FILTERING_ON) {
		DEBUGLOG("bd_ans_hw_EnableVLAN: enabling vlan filtering\n");
      	for (i=0; i < iANSdata->num_vlan_filter; i++)
      	{
         	VftaIndex = (iANSdata->VlanID[i] >> 5) & 0x7F;
         	BitInReg = iANSdata->VlanID[i] & 0x1F;  

         	// This is Read-Modify-Write operation
         	VftaReg = E1000_READ_REG(Vfta[VftaIndex]);
         	VftaReg |= (1 << BitInReg);
         	E1000_WRITE_REG(Vfta[VftaIndex], VftaReg);
      	}
	  }

      //************************************************************
      // Set the VFE bit in the Receive Control register, and clear
      // the CFIEN bit.  This enables the VLAN filter, and does not
      // reject packets with the CFI bit set.  These bits will get
      // written out when we bring the adapter out of reset.
      // Clear the SISLH and ISLE bits to make sure we don't do ISL.
      //************************************************************
      TempRctlReg |= E1000_RCTL_VFE;
      TempRctlReg &= ~E1000_RCTL_CFIEN;
      TempRctlReg &= ~E1000_RCTL_SISLH;
      TempRctlReg &= ~E1000_RCTL_ISLE;
#ifdef UW78
      TempRctlReg &= ~E1000_RCTL_VFE;
#endif

   } // end of if (Adapter->VlanMode == VLAN_MODE_IEEE)
   else  // VlanMode is ISL
   {
	  DEBUGLOG("bd_ans_hw_EnableVLAN: enabling ISL vlan\n");

      /**************************************************************
      ** Clear VLAN Mode Enable bit in the Control register (CTRL.VME).
      **************************************************************/
      DeviceControlReg = E1000_READ_REG(Ctrl);
      DeviceControlReg &= ~E1000_CTRL_VME;
      E1000_WRITE_REG(Ctrl, DeviceControlReg);
      
      //************************************************************
      // Set the SISLH and ISLE bits in the Receive Control register.
      // This allows reception of ISL packets, and stripping of
      // headers. We also clear the VFE and CFIEN bits to turn off
      // IEEE.
      //************************************************************
      TempRctlReg |= E1000_RCTL_SISLH;
      TempRctlReg |= E1000_RCTL_ISLE;
      TempRctlReg &= ~E1000_RCTL_VFE;
      TempRctlReg &= ~E1000_RCTL_CFIEN;
   }
   


   //***************************************************************
   // Restore the saved Rctl register, along with our changed bits.
   //***************************************************************

   E1000_WRITE_REG(Rctl, TempRctlReg);
 
   return BD_ANS_SUCCESS;
}   

//*********************************************************************
// Name:         bd_ans_hw_DisableTagging
//
// Description:  Disables all tagging functions on the adapter.  Turns
//               off VLAN filtering and tag stripping on receive, and 
//               disables tagging on send.
//
// Author:       Mitch Williams
//
// Born on Date: 4/13/1999
//
// Arguments:    Adapter - Pointer to HSM's Adapter Data Space
//
// Returns:      ODISTAT
//
// Modification log:
// Date       Who      Description
// --------   ---      ------------------------------------------------
// 3/21/00  kcarlson    Modified for generic ans_hw.c file to share amongst
//                      all OS who support ANS.
//
//*********************************************************************
BD_ANS_STATUS 
bd_ans_hw_DisableTagging(BOARD_PRIVATE_STRUCT *bps)
{
   UINT32   DeviceControlReg;
   UINT32   i;
   UINT32   TempRctlReg;
   UINT32   PciCommandWord;
   ADAPTER_STRUCT *Adapter = GIGABIT_ADAPTER_STRUCT(bps);

    DEBUGLOG("bd_ans_hw_DisableTagging: enter\n");
    
   //***************************************************************
   // Read the RX control register.  We'll make changes and write
   // it back out at the end of the routine.
   //***************************************************************
   TempRctlReg = E1000_READ_REG(Rctl);


   //***************************************************************
   // Reset VLAN Mode Enable bit in the Control register (CTRL.VME).
   // This turns off adding/stripping 802.3ac tags.
   //***************************************************************
   DeviceControlReg = E1000_READ_REG(Ctrl);
   DeviceControlReg &= ~E1000_CTRL_VME;
   E1000_WRITE_REG(Ctrl, DeviceControlReg);

   //**********************************************************
   // Clear the VLAN Filter Table Array (VFTA).
   //**********************************************************

   for (i=0; i<E1000_VLAN_FILTER_TBL_SIZE; i++)
      E1000_WRITE_REG(Vfta[i], 0);


   //************************************************************
   // Clear the VFE and ISLE bits in the Receive Control register.
   //************************************************************

   TempRctlReg &= ~E1000_RCTL_VFE;
   TempRctlReg &= ~E1000_RCTL_ISLE;
   TempRctlReg &= ~E1000_RCTL_SISLH;


   E1000_WRITE_REG(Rctl, TempRctlReg);
  
   return BD_ANS_SUCCESS;
}   

//*********************************************************************
// Name:         bd_ans_hw_EnablePriorityRx
//
// Description:  Enables priority tag stripping on the adapter.  Turns on 
//               VLAN filtering and tag stripping on receive, and enables
//               tagging on send.
//               This routine is based on Pat Connor's NDIS code.
//
// Author:       Mitch Williams
//
// Born on Date: 4/13/1999
//
// Arguments:    Adapter - Pointer to HSM's Adapter Data Space
//
// Returns:      ODISTAT    
//
// Modification log:
// Date       Who      Description
// --------   ---      ------------------------------------------------
// 3/21/00  kcarlson    Modified for generic ans_hw.c file to share amongst
//                      all OS who support ANS.
//
//*********************************************************************
BD_ANS_STATUS
bd_ans_hw_EnablePriorityRx(BOARD_PRIVATE_STRUCT *bps)
{
   UINT32   DeviceControlReg;
   UINT32   VftaReg;
   UINT32   TempRctlReg;
   UINT32   PciCommandWord;
   ADAPTER_STRUCT *Adapter = GIGABIT_ADAPTER_STRUCT(bps);

   DEBUGLOG("bd_ans_hw_EnablePriorityRx: enter\n");
   TempRctlReg = E1000_READ_REG(Rctl);


   /******************************************************************
   ** Set the VLAN Ethertype (VET) register, so the hardware knows
   ** what Ethertype to look for to strip the Q-tag.
   ******************************************************************/
   E1000_WRITE_REG(Vet, ETHERNET_IEEE_VLAN_TYPE);

   /**************************************************************
   ** Set VLAN Mode Enable bit in the Control register (CTRL.VME).
   ** This allows adding/stripping 802.3ac tags.
   **************************************************************/
   DeviceControlReg = E1000_READ_REG(Ctrl);
   DeviceControlReg |= E1000_CTRL_VME;
   E1000_WRITE_REG(Ctrl, DeviceControlReg);


   //**********************************************************
   // Set the VLAN Filter Table Array (VFTA) to only accept
   // packets on VLAN 0.  This will cause the hardware to 
   // reject all packets with valid VLAN tags, and only receive
   // packets with priority-only information.
   //**********************************************************

   VftaReg = E1000_READ_REG(Vfta[0]);
   VftaReg |= 1;
   E1000_WRITE_REG(Vfta[0], VftaReg);

   //************************************************************
   // Set the VFE bit in the Receive Control register, and clear
   // the CFIEN bit.  This enables the VLAN filter, and does not
   // reject packets with the CFI bit set.  These bits will get
   // written out when we bring the adapter out of reset.
   // Clear the SISLH and ISLE bits to make sure we don't do ISL.
   //************************************************************
   TempRctlReg |= E1000_RCTL_VFE;
   TempRctlReg &= ~E1000_RCTL_CFIEN;
   TempRctlReg &= ~E1000_RCTL_SISLH;
   TempRctlReg &= ~E1000_RCTL_ISLE;

   //***************************************************************
   // Restore the saved Rctl register, along with our changed bits.
   //***************************************************************

   E1000_WRITE_REG(Rctl, TempRctlReg);
   return BD_ANS_SUCCESS;
}   
#endif