Stop.c

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#include "Snp.h"
 
EFI_STATUS
PxeStop (
  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->IfNum;
  Snp->Cdb.Control   = PXE_CONTROL_LAST_CDB_IN_LIST;
 
  //
  // Issue UNDI command
  //
  DEBUG ((DEBUG_NET, "\nsnp->undi.stop()  "));
 
  (*Snp->IssueUndi32Command)((UINT64)(UINTN)&Snp->Cdb);
 
  if (Snp->Cdb.StatCode != PXE_STATCODE_SUCCESS) {
    DEBUG (
      (DEBUG_WARN,
       "\nsnp->undi.stop()  %xh:%xh\n",
       Snp->Cdb.StatFlags,
       Snp->Cdb.StatCode)
      );
 
    return EFI_DEVICE_ERROR;
  }
 
  //
  // Set simple network state to Started and return success.
  //
  Snp->Mode.State = EfiSimpleNetworkStopped;
  return EFI_SUCCESS;
}
 
EFI_STATUS
EFIAPI
SnpUndi32Stop (
  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 = PxeStop (Snp);
 
ON_EXIT:
  gBS->RestoreTPL (OldTpl);
 
  return Status;
}