MdeModulePkg/Universal/Network/SnpDxe/stop.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:
  stop.c

Abstract:

Revision history:
  2000-Feb-09 M(f)J   Genesis.

**/

#include "Snp.h"


/**
  this routine calls undi to stop the interface and changes the snp state

  @param  snp   pointer to snp driver structure


**/
EFI_STATUS
pxe_stop (
  SNP_DRIVER *snp
  )
{
  snp->cdb.OpCode     = PXE_OPCODE_STOP;
  snp->cdb.OpFlags    = PXE_OPFLAGS_NOT_USED;
  snp->cdb.CPBsize    = PXE_CPBSIZE_NOT_USED;
  snp->cdb.DBsize     = PXE_DBSIZE_NOT_USED;
  snp->cdb.CPBaddr    = PXE_CPBADDR_NOT_USED;
  snp->cdb.DBaddr     = PXE_DBADDR_NOT_USED;
  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
  //
  DEBUG ((EFI_D_NET, "\nsnp->undi.stop()  "));

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

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

    return EFI_DEVICE_ERROR;
  }
  //
  // Set simple network state to Started and return success.
  //
  snp->mode.State = EfiSimpleNetworkStopped;
  return EFI_SUCCESS;
}


/**
  This is the SNP interface routine for stopping the interface.
  This routine basically retrieves snp structure, checks the SNP state and
  calls the pxe_stop routine to actually stop the undi interface

  @param  this  context pointer


**/
EFI_STATUS
EFIAPI
snp_undi32_stop (
  IN EFI_SIMPLE_NETWORK_PROTOCOL *this
  )
{
  SNP_DRIVER  *snp;
  EFI_TPL     OldTpl;
  EFI_STATUS  Status;

  if (this == NULL) {
    return EFI_INVALID_PARAMETER;
  }

  snp = EFI_SIMPLE_NETWORK_DEV_FROM_THIS (this);

  OldTpl = gBS->RaiseTPL (TPL_CALLBACK);

  switch (snp->mode.State) {
  case EfiSimpleNetworkStarted:
    break;

  case EfiSimpleNetworkStopped:
    Status = EFI_NOT_STARTED;
    goto ON_EXIT;

  default:
    Status = EFI_DEVICE_ERROR;
    goto ON_EXIT;
  }

  Status = pxe_stop (snp);

ON_EXIT:
  gBS->RestoreTPL (OldTpl);

  return Status;
}