1/** @file
2    Implementation of resetting a network adapter.
3
4Copyright (c) 2004 - 2007, Intel Corporation. All rights reserved.<BR>
5This program and the accompanying materials are licensed and made available under the
6terms and conditions of the BSD License which accompanies this distribution. The
7full text of the license may be found at
8http://opensource.org/licenses/bsd-license.php
9
10THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
11WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
12
13**/
14
15#include "Snp.h"
16
17
18/**
19  Call UNDI to reset the NIC.
20
21  @param  Snp                 Pointer to the snp driver structure.
22
23  @return EFI_SUCCESSFUL      The NIC was reset.
24  @retval EFI_DEVICE_ERROR    The NIC cannot be reset.
25
26**/
27EFI_STATUS
28PxeReset (
29  SNP_DRIVER *Snp
30  )
31{
32  Snp->Cdb.OpCode     = PXE_OPCODE_RESET;
33  Snp->Cdb.OpFlags    = PXE_OPFLAGS_NOT_USED;
34  Snp->Cdb.CPBsize    = PXE_CPBSIZE_NOT_USED;
35  Snp->Cdb.DBsize     = PXE_DBSIZE_NOT_USED;
36  Snp->Cdb.CPBaddr    = PXE_CPBADDR_NOT_USED;
37  Snp->Cdb.DBaddr     = PXE_DBADDR_NOT_USED;
38  Snp->Cdb.StatCode   = PXE_STATCODE_INITIALIZE;
39  Snp->Cdb.StatFlags  = PXE_STATFLAGS_INITIALIZE;
40  Snp->Cdb.IFnum      = Snp->IfNum;
41  Snp->Cdb.Control    = PXE_CONTROL_LAST_CDB_IN_LIST;
42
43  //
44  // Issue UNDI command and check result.
45  //
46  DEBUG ((EFI_D_NET, "\nsnp->undi.reset()  "));
47
48  (*Snp->IssueUndi32Command) ((UINT64)(UINTN) &Snp->Cdb);
49
50  if (Snp->Cdb.StatCode != PXE_STATCODE_SUCCESS) {
51    DEBUG (
52      (EFI_D_WARN,
53      "\nsnp->undi32.reset()  %xh:%xh\n",
54      Snp->Cdb.StatFlags,
55      Snp->Cdb.StatCode)
56      );
57
58    //
59    // UNDI could not be reset. Return UNDI error.
60    //
61    return EFI_DEVICE_ERROR;
62  }
63
64  return EFI_SUCCESS;
65}
66
67
68/**
69  Resets a network adapter and reinitializes it with the parameters that were
70  provided in the previous call to Initialize().
71
72  This function resets a network adapter and reinitializes it with the parameters
73  that were provided in the previous call to Initialize(). The transmit and
74  receive queues are emptied and all pending interrupts are cleared.
75  Receive filters, the station address, the statistics, and the multicast-IP-to-HW
76  MAC addresses are not reset by this call. If the network interface was
77  successfully reset, then EFI_SUCCESS will be returned. If the driver has not
78  been initialized, EFI_DEVICE_ERROR will be returned.
79
80  @param This                 A pointer to the EFI_SIMPLE_NETWORK_PROTOCOL instance.
81  @param ExtendedVerification Indicates that the driver may perform a more
82                              exhaustive verification operation of the device
83                              during reset.
84
85  @retval EFI_SUCCESS           The network interface was reset.
86  @retval EFI_NOT_STARTED       The network interface has not been started.
87  @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
88  @retval EFI_DEVICE_ERROR      The command could not be sent to the network interface.
89  @retval EFI_UNSUPPORTED       This function is not supported by the network interface.
90
91**/
92EFI_STATUS
93EFIAPI
94SnpUndi32Reset (
95  IN EFI_SIMPLE_NETWORK_PROTOCOL *This,
96  IN BOOLEAN                     ExtendedVerification
97  )
98{
99  SNP_DRIVER  *Snp;
100  EFI_TPL     OldTpl;
101  EFI_STATUS  Status;
102
103  //
104  // Resolve Warning 4 unreferenced parameter problem
105  //
106  ExtendedVerification = 0;
107  DEBUG ((EFI_D_WARN, "ExtendedVerification = %d is not implemented!\n", ExtendedVerification));
108
109  if (This == NULL) {
110    return EFI_INVALID_PARAMETER;
111  }
112
113  Snp = EFI_SIMPLE_NETWORK_DEV_FROM_THIS (This);
114
115  OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
116
117  switch (Snp->Mode.State) {
118  case EfiSimpleNetworkInitialized:
119    break;
120
121  case EfiSimpleNetworkStopped:
122    Status = EFI_NOT_STARTED;
123    goto ON_EXIT;
124
125  default:
126    Status = EFI_DEVICE_ERROR;
127    goto ON_EXIT;
128  }
129
130  Status = PxeReset (Snp);
131
132ON_EXIT:
133  gBS->RestoreTPL (OldTpl);
134
135  return Status;
136}
137