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