diff options
Diffstat (limited to 'OvmfPkg/VirtioNetDxe/SnpGetStatus.c')
| -rw-r--r-- | OvmfPkg/VirtioNetDxe/SnpGetStatus.c | 160 |
1 files changed, 0 insertions, 160 deletions
diff --git a/OvmfPkg/VirtioNetDxe/SnpGetStatus.c b/OvmfPkg/VirtioNetDxe/SnpGetStatus.c deleted file mode 100644 index 694940ea1d..0000000000 --- a/OvmfPkg/VirtioNetDxe/SnpGetStatus.c +++ /dev/null @@ -1,160 +0,0 @@ -/** @file
-
- Implementation of the SNP.GetStatus() function and its private helpers if
- any.
-
- Copyright (C) 2013, Red Hat, Inc.
- Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR>
-
- This program and the accompanying materials are licensed and made available
- under the terms and conditions of the BSD License which accompanies this
- distribution. The full text of the license may be found at
- http://opensource.org/licenses/bsd-license.php
-
- THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT
- WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
-
-**/
-
-#include <Library/BaseLib.h>
-#include <Library/UefiBootServicesTableLib.h>
-
-#include "VirtioNet.h"
-
-/**
- Reads the current interrupt status and recycled transmit buffer status from
- a network interface.
-
- @param This The protocol instance pointer.
- @param InterruptStatus A pointer to the bit mask of the currently active
- interrupts If this is NULL, the interrupt status will
- not be read from the device. If this is not NULL, the
- interrupt status will be read from the device. When
- the interrupt status is read, it will also be
- cleared. Clearing the transmit interrupt does not
- empty the recycled transmit buffer array.
- @param TxBuf Recycled transmit buffer address. The network
- interface will not transmit if its internal recycled
- transmit buffer array is full. Reading the transmit
- buffer does not clear the transmit interrupt. If this
- is NULL, then the transmit buffer status will not be
- read. If there are no transmit buffers to recycle and
- TxBuf is not NULL, * TxBuf will be set to NULL.
-
- @retval EFI_SUCCESS The status of the network interface was
- retrieved.
- @retval EFI_NOT_STARTED The network interface has not been started.
- @retval EFI_INVALID_PARAMETER One or more of the parameters has an
- unsupported value.
- @retval EFI_DEVICE_ERROR The command could not be sent to the network
- interface.
- @retval EFI_UNSUPPORTED This function is not supported by the network
- interface.
-
-**/
-
-EFI_STATUS
-EFIAPI
-VirtioNetGetStatus (
- IN EFI_SIMPLE_NETWORK_PROTOCOL *This,
- OUT UINT32 *InterruptStatus OPTIONAL,
- OUT VOID **TxBuf OPTIONAL
- )
-{
- VNET_DEV *Dev;
- EFI_TPL OldTpl;
- EFI_STATUS Status;
- UINT16 RxCurUsed;
- UINT16 TxCurUsed;
-
- if (This == NULL) {
- return EFI_INVALID_PARAMETER;
- }
-
- Dev = VIRTIO_NET_FROM_SNP (This);
- OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
- switch (Dev->Snm.State) {
- case EfiSimpleNetworkStopped:
- Status = EFI_NOT_STARTED;
- goto Exit;
- case EfiSimpleNetworkStarted:
- Status = EFI_DEVICE_ERROR;
- goto Exit;
- default:
- break;
- }
-
- //
- // update link status
- //
- if (Dev->Snm.MediaPresentSupported) {
- UINT16 LinkStatus;
-
- Status = VIRTIO_CFG_READ (Dev, LinkStatus, &LinkStatus);
- if (EFI_ERROR (Status)) {
- goto Exit;
- }
- Dev->Snm.MediaPresent =
- (BOOLEAN) ((LinkStatus & VIRTIO_NET_S_LINK_UP) != 0);
- }
-
- //
- // virtio-0.9.5, 2.4.2 Receiving Used Buffers From the Device
- //
- MemoryFence ();
- RxCurUsed = *Dev->RxRing.Used.Idx;
- TxCurUsed = *Dev->TxRing.Used.Idx;
- MemoryFence ();
-
- if (InterruptStatus != NULL) {
- //
- // report the receive interrupt if there is data available for reception,
- // report the transmit interrupt if we have transmitted at least one buffer
- //
- *InterruptStatus = 0;
- if (Dev->RxLastUsed != RxCurUsed) {
- *InterruptStatus |= EFI_SIMPLE_NETWORK_RECEIVE_INTERRUPT;
- }
- if (Dev->TxLastUsed != TxCurUsed) {
- ASSERT (Dev->TxCurPending > 0);
- *InterruptStatus |= EFI_SIMPLE_NETWORK_TRANSMIT_INTERRUPT;
- }
- }
-
- if (TxBuf != NULL) {
- if (Dev->TxLastUsed == TxCurUsed) {
- *TxBuf = NULL;
- }
- else {
- UINT16 UsedElemIdx;
- UINT32 DescIdx;
-
- //
- // fetch the first descriptor among those that the hypervisor reports
- // completed
- //
- ASSERT (Dev->TxCurPending > 0);
- ASSERT (Dev->TxCurPending <= Dev->TxMaxPending);
-
- UsedElemIdx = Dev->TxLastUsed++ % Dev->TxRing.QueueSize;
- DescIdx = Dev->TxRing.Used.UsedElem[UsedElemIdx].Id;
- ASSERT (DescIdx < (UINT32) (2 * Dev->TxMaxPending - 1));
-
- //
- // report buffer address to caller that has been enqueued by caller
- //
- *TxBuf = (VOID *)(UINTN) Dev->TxRing.Desc[DescIdx + 1].Addr;
-
- //
- // now this descriptor can be used again to enqueue a transmit buffer
- //
- Dev->TxFreeStack[--Dev->TxCurPending] = (UINT16) DescIdx;
- }
- }
-
- Status = EFI_SUCCESS;
-
-Exit:
- gBS->RestoreTPL (OldTpl);
- return Status;
-}
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