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1 /** @file
2
3 Implementation of the SNP.Shutdown() function and its private helpers if any.
4
5 Copyright (C) 2013, Red Hat, Inc.
6 Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
7
8 This program and the accompanying materials are licensed and made available
9 under the terms and conditions of the BSD License which accompanies this
10 distribution. The full text of the license may be found at
11 http://opensource.org/licenses/bsd-license.php
12
13 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT
14 WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
15
16 **/
17
18 #include <Library/UefiBootServicesTableLib.h>
19
20 #include "VirtioNet.h"
21
22 /**
23 Resets a network adapter and leaves it in a state that is safe for another
24 driver to initialize.
25
26 @param This Protocol instance pointer.
27
28 @retval EFI_SUCCESS The network interface was shutdown.
29 @retval EFI_NOT_STARTED The network interface has not been started.
30 @retval EFI_INVALID_PARAMETER One or more of the parameters has an
31 unsupported value.
32 @retval EFI_DEVICE_ERROR The command could not be sent to the network
33 interface.
34 @retval EFI_UNSUPPORTED This function is not supported by the network
35 interface.
36
37 **/
38
39 EFI_STATUS
40 EFIAPI
41 VirtioNetShutdown (
42 IN EFI_SIMPLE_NETWORK_PROTOCOL *This
43 )
44 {
45 VNET_DEV *Dev;
46 EFI_TPL OldTpl;
47 EFI_STATUS Status;
48
49 if (This == NULL) {
50 return EFI_INVALID_PARAMETER;
51 }
52
53 Dev = VIRTIO_NET_FROM_SNP (This);
54 OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
55 switch (Dev->Snm.State) {
56 case EfiSimpleNetworkStopped:
57 Status = EFI_NOT_STARTED;
58 goto Exit;
59 case EfiSimpleNetworkStarted:
60 Status = EFI_DEVICE_ERROR;
61 goto Exit;
62 default:
63 break;
64 }
65
66 Dev->VirtIo->SetDeviceStatus (Dev->VirtIo, 0);
67 VirtioNetShutdownRx (Dev);
68 VirtioNetShutdownTx (Dev);
69 VirtioRingUninit (&Dev->TxRing);
70 VirtioRingUninit (&Dev->RxRing);
71
72 Dev->Snm.State = EfiSimpleNetworkStarted;
73 Status = EFI_SUCCESS;
74
75 Exit:
76 gBS->RestoreTPL (OldTpl);
77 return Status;
78 }