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