system76-edk2/MdeModulePkg/Universal/Network/SnpDxe/Station_address.c

/** @file
Copyright (c) 2004 - 2007, Intel Corporation
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution.  The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php

THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

Module name:
  station_address.c

Abstract:

Revision history:
  2000-Feb-17 M(f)J   Genesis.

**/

#include "Snp.h"


/**
  this routine calls undi to read the MAC address of the NIC and updates the
  mode structure with the address.

  @param  snp         pointer to snp driver structure


**/
EFI_STATUS
pxe_get_stn_addr (
  SNP_DRIVER *snp
  )
{
  PXE_DB_STATION_ADDRESS  *db;

  db                  = snp->db;
  snp->cdb.OpCode     = PXE_OPCODE_STATION_ADDRESS;
  snp->cdb.OpFlags    = PXE_OPFLAGS_STATION_ADDRESS_READ;

  snp->cdb.CPBaddr    = PXE_CPBADDR_NOT_USED;
  snp->cdb.CPBsize    = PXE_CPBSIZE_NOT_USED;

  snp->cdb.DBsize     = sizeof (PXE_DB_STATION_ADDRESS);
  snp->cdb.DBaddr     = (UINT64)(UINTN) db;

  snp->cdb.StatCode   = PXE_STATCODE_INITIALIZE;
  snp->cdb.StatFlags  = PXE_STATFLAGS_INITIALIZE;
  snp->cdb.IFnum      = snp->if_num;
  snp->cdb.Control    = PXE_CONTROL_LAST_CDB_IN_LIST;

  //
  // Issue UNDI command and check result.
  //
  DEBUG ((EFI_D_NET, "\nsnp->undi.station_addr()  "));

  (*snp->issue_undi32_command) ((UINT64)(UINTN) &snp->cdb);

  if (snp->cdb.StatCode != PXE_STATCODE_SUCCESS) {
    DEBUG (
      (EFI_D_ERROR,
      "\nsnp->undi.station_addr()  %xh:%xh\n",
      snp->cdb.StatFlags,
      snp->cdb.StatCode)
      );

    return EFI_DEVICE_ERROR;
  }
  //
  // Set new station address in SNP->Mode structure and return success.
  //
  CopyMem (
    &(snp->mode.CurrentAddress),
    &db->StationAddr,
    snp->mode.HwAddressSize
    );

  CopyMem (
    &snp->mode.BroadcastAddress,
    &db->BroadcastAddr,
    snp->mode.HwAddressSize
    );

  CopyMem (
    &snp->mode.PermanentAddress,
    &db->PermanentAddr,
    snp->mode.HwAddressSize
    );

  return EFI_SUCCESS;
}


/**
  this routine calls undi to set a new MAC address for the NIC,

  @param  snp         pointer to snp driver structure
  @param  NewMacAddr  pointer to a mac address to be set for the nic, if this is
                      NULL then this routine resets the mac address to the NIC's
                      original address.


**/
STATIC
EFI_STATUS
pxe_set_stn_addr (
  SNP_DRIVER      *snp,
  EFI_MAC_ADDRESS *NewMacAddr
  )
{
  PXE_CPB_STATION_ADDRESS *cpb;
  PXE_DB_STATION_ADDRESS  *db;

  cpb             = snp->cpb;
  db              = snp->db;
  snp->cdb.OpCode = PXE_OPCODE_STATION_ADDRESS;

  if (NewMacAddr == NULL) {
    snp->cdb.OpFlags  = PXE_OPFLAGS_STATION_ADDRESS_RESET;
    snp->cdb.CPBsize  = PXE_CPBSIZE_NOT_USED;
    snp->cdb.CPBaddr  = PXE_CPBADDR_NOT_USED;
  } else {
    snp->cdb.OpFlags = PXE_OPFLAGS_STATION_ADDRESS_READ;
    //
    // even though the OPFLAGS are set to READ, supplying a new address
    // in the CPB will make undi change the mac address to the new one.
    //
    CopyMem (&cpb->StationAddr, NewMacAddr, snp->mode.HwAddressSize);

    snp->cdb.CPBsize  = sizeof (PXE_CPB_STATION_ADDRESS);
    snp->cdb.CPBaddr  = (UINT64)(UINTN) cpb;
  }

  snp->cdb.DBsize     = sizeof (PXE_DB_STATION_ADDRESS);
  snp->cdb.DBaddr     = (UINT64)(UINTN) db;

  snp->cdb.StatCode   = PXE_STATCODE_INITIALIZE;
  snp->cdb.StatFlags  = PXE_STATFLAGS_INITIALIZE;
  snp->cdb.IFnum      = snp->if_num;
  snp->cdb.Control    = PXE_CONTROL_LAST_CDB_IN_LIST;

  //
  // Issue UNDI command and check result.
  //
  DEBUG ((EFI_D_NET, "\nsnp->undi.station_addr()  "));

  (*snp->issue_undi32_command) ((UINT64)(UINTN) &snp->cdb);

  if (snp->cdb.StatCode != PXE_STATCODE_SUCCESS) {
    DEBUG (
      (EFI_D_ERROR,
      "\nsnp->undi.station_addr()  %xh:%xh\n",
      snp->cdb.StatFlags,
      snp->cdb.StatCode)
      );

    //
    // UNDI command failed.  Return UNDI status to caller.
    //
    return EFI_DEVICE_ERROR;
  }
  //
  // read the changed address and save it in SNP->Mode structure
  //
  pxe_get_stn_addr (snp);

  return EFI_SUCCESS;
}


/**
  This is the SNP interface routine for changing the NIC's mac address.
  This routine basically retrieves snp structure, checks the SNP state and
  calls the above routines to actually do the work

  @param  this        context pointer
  @param  NewMacAddr  pointer to a mac address to be set for the nic, if this is
                      NULL then this routine resets the mac address to the NIC's
                      original address.
  @param  ResetFlag   If true, the mac address will change to NIC's original
                      address


**/
EFI_STATUS
EFIAPI
snp_undi32_station_address (
  IN EFI_SIMPLE_NETWORK_PROTOCOL * this,
  IN BOOLEAN                     ResetFlag,
  IN EFI_MAC_ADDRESS             * NewMacAddr OPTIONAL
  )
{
  SNP_DRIVER  *snp;
  EFI_STATUS  Status;
  EFI_TPL     OldTpl;

  //
  // Check for invalid parameter combinations.
  //
  if ((this == NULL) ||
    (!ResetFlag && (NewMacAddr == NULL))) {
    return EFI_INVALID_PARAMETER;
  }

  snp = EFI_SIMPLE_NETWORK_DEV_FROM_THIS (this);

  OldTpl = gBS->RaiseTPL (TPL_CALLBACK);

  //
  // Return error if the SNP is not initialized.
  //
  switch (snp->mode.State) {
  case EfiSimpleNetworkInitialized:
    break;

  case EfiSimpleNetworkStopped:
    Status = EFI_NOT_STARTED;
    goto ON_EXIT;

  default:
    Status = EFI_DEVICE_ERROR;
    goto ON_EXIT;
  }

  if (ResetFlag) {
    Status = pxe_set_stn_addr (snp, NULL);
  } else {
    Status = pxe_set_stn_addr (snp, NewMacAddr);
  }

ON_EXIT:
  gBS->RestoreTPL (OldTpl);

  return Status;
}