MdeModulePkg/Universal/Network/SnpDxe/Reset.c

   1 /** @file
   2     Implementation of resetting a network adapter.
   3
   4 Copyright (c) 2004 - 2018, Intel Corporation. All rights reserved.<BR>
   5 SPDX-License-Identifier: BSD-2-Clause-Patent
   6
   7 **/
   8
   9 #include "Snp.h"
  10
  11
  12 /**
  13   Call UNDI to reset the NIC.
  14
  15   @param  Snp                 Pointer to the snp driver structure.
  16
  17   @return EFI_SUCCESSFUL      The NIC was reset.
  18   @retval EFI_DEVICE_ERROR    The NIC cannot be reset.
  19
  20 **/
  21 EFI_STATUS
  22 PxeReset (
  23   SNP_DRIVER *Snp
  24   )
  25 {
  26   Snp->Cdb.OpCode     = PXE_OPCODE_RESET;
  27   Snp->Cdb.OpFlags    = PXE_OPFLAGS_NOT_USED;
  28   Snp->Cdb.CPBsize    = PXE_CPBSIZE_NOT_USED;
  29   Snp->Cdb.DBsize     = PXE_DBSIZE_NOT_USED;
  30   Snp->Cdb.CPBaddr    = PXE_CPBADDR_NOT_USED;
  31   Snp->Cdb.DBaddr     = PXE_DBADDR_NOT_USED;
  32   Snp->Cdb.StatCode   = PXE_STATCODE_INITIALIZE;
  33   Snp->Cdb.StatFlags  = PXE_STATFLAGS_INITIALIZE;
  34   Snp->Cdb.IFnum      = Snp->IfNum;
  35   Snp->Cdb.Control    = PXE_CONTROL_LAST_CDB_IN_LIST;
  36
  37   //
  38   // Issue UNDI command and check result.
  39   //
  40   DEBUG ((EFI_D_NET, "\nsnp->undi.reset()  "));
  41
  42   (*Snp->IssueUndi32Command) ((UINT64)(UINTN) &Snp->Cdb);
  43
  44   if (Snp->Cdb.StatCode != PXE_STATCODE_SUCCESS) {
  45     DEBUG (
  46       (EFI_D_WARN,
  47       "\nsnp->undi32.reset()  %xh:%xh\n",
  48       Snp->Cdb.StatFlags,
  49       Snp->Cdb.StatCode)
  50       );
  51
  52     //
  53     // UNDI could not be reset. Return UNDI error.
  54     //
  55     return EFI_DEVICE_ERROR;
  56   }
  57
  58   return EFI_SUCCESS;
  59 }
  60
  61
  62 /**
  63   Resets a network adapter and reinitializes it with the parameters that were
  64   provided in the previous call to Initialize().
  65
  66   This function resets a network adapter and reinitializes it with the parameters
  67   that were provided in the previous call to Initialize(). The transmit and
  68   receive queues are emptied and all pending interrupts are cleared.
  69   Receive filters, the station address, the statistics, and the multicast-IP-to-HW
  70   MAC addresses are not reset by this call. If the network interface was
  71   successfully reset, then EFI_SUCCESS will be returned. If the driver has not
  72   been initialized, EFI_DEVICE_ERROR will be returned.
  73
  74   @param This                 A pointer to the EFI_SIMPLE_NETWORK_PROTOCOL instance.
  75   @param ExtendedVerification Indicates that the driver may perform a more
  76                               exhaustive verification operation of the device
  77                               during reset.
  78
  79   @retval EFI_SUCCESS           The network interface was reset.
  80   @retval EFI_NOT_STARTED       The network interface has not been started.
  81   @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
  82   @retval EFI_DEVICE_ERROR      The command could not be sent to the network interface.
  83   @retval EFI_UNSUPPORTED       This function is not supported by the network interface.
  84
  85 **/
  86 EFI_STATUS
  87 EFIAPI
  88 SnpUndi32Reset (
  89   IN EFI_SIMPLE_NETWORK_PROTOCOL *This,
  90   IN BOOLEAN                     ExtendedVerification
  91   )
  92 {
  93   SNP_DRIVER  *Snp;
  94   EFI_TPL     OldTpl;
  95   EFI_STATUS  Status;
  96
  97   //
  98   // Resolve Warning 4 unreferenced parameter problem
  99   //
 100   ExtendedVerification = 0;
 101   DEBUG ((EFI_D_WARN, "ExtendedVerification = %d is not implemented!\n", ExtendedVerification));
 102
 103   if (This == NULL) {
 104     return EFI_INVALID_PARAMETER;
 105   }
 106
 107   Snp = EFI_SIMPLE_NETWORK_DEV_FROM_THIS (This);
 108
 109   OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
 110
 111   switch (Snp->Mode.State) {
 112   case EfiSimpleNetworkInitialized:
 113     break;
 114
 115   case EfiSimpleNetworkStopped:
 116     Status = EFI_NOT_STARTED;
 117     goto ON_EXIT;
 118
 119   default:
 120     Status = EFI_DEVICE_ERROR;
 121     goto ON_EXIT;
 122   }
 123
 124   Status = PxeReset (Snp);
 125
 126 ON_EXIT:
 127   gBS->RestoreTPL (OldTpl);
 128
 129   return Status;
 130 }