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
PxeReset(SNP_DRIVER * Snp)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
SnpUndi32Reset(IN EFI_SIMPLE_NETWORK_PROTOCOL * This,IN BOOLEAN ExtendedVerification)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 }
131