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// Copyright (c) Microsoft Corporation. All rights reserved
#include "pch.hpp"
#include "netvadapter.h"
#include "rxqueue.h"
#include "memory.h"
static
void
CheckForWakeFrame(
NetvRxQueue * rx
)
{
NET_RING_FRAGMENT_ITERATOR fi = NetRingGetAllFragments(rx->m_rings);
if (! NetFragmentIteratorHasAny(&fi))
{
return;
}
auto *fragment = NetFragmentIteratorGetFragment(&fi);
auto *rxVirtualAddress = NetExtensionGetFragmentVirtualAddress(
&rx->VirtualAddressExtension,
NetFragmentIteratorGetIndex(&fi));
auto *fragmentBuffer = reinterpret_cast<unsigned char *>(rxVirtualAddress->VirtualAddress) + fragment->Offset;
fragment->ValidLength = EnlCopyWakeFrame(
NetvEnlMLink[rx->m_adapter.EnlIndex].LinkHandle[0],
fragmentBuffer,
fragment->Capacity);
// If there was a pending wake frame mark this fragment as complete, the normal advance code will get to it
fragment->Scratch = fragment->ValidLength > 0 ? 1 : 0;
rx->CheckedWakeFrame = true;
}
NetvRxQueue::NetvRxQueue(
NETPACKETQUEUE Handle,
NetvAdapter & Adapter
)
: NetvQueue{Handle, Adapter, NetRxQueueGetRingCollection(Handle)}
{
NET_EXTENSION_QUERY extension;
NET_EXTENSION_QUERY_INIT(
&extension,
NET_FRAGMENT_EXTENSION_VIRTUAL_ADDRESS_NAME,
NET_FRAGMENT_EXTENSION_VIRTUAL_ADDRESS_VERSION_1,
NetExtensionTypeFragment);
NetRxQueueGetExtension(m_handle, &extension, &VirtualAddressExtension);
NET_EXTENSION_QUERY_INIT(
&extension,
NET_PACKET_EXTENSION_RSC_NAME,
NET_PACKET_EXTENSION_RSC_VERSION_2,
NetExtensionTypePacket);
NetRxQueueGetExtension(m_handle, &extension, &UdpRscExtension);
NET_EXTENSION_QUERY_INIT(
&extension,
NET_PACKET_EXTENSION_CHECKSUM_NAME,
NET_PACKET_EXTENSION_CHECKSUM_VERSION_1,
NetExtensionTypePacket);
NetRxQueueGetExtension(m_handle, &extension, &RxXSumExtension);
EnlQueueHandle = EnlCreateQueue(Handle, RX);
}
_Use_decl_annotations_
void
NetvRxQueue::Destroy(
void
)
{
EnlDestroyQueue(EnlQueueHandle, RX);
}
void
NetvRxQueue::Start(
void
)
{
auto link = NetvEnlMLink[m_adapter.EnlIndex].LinkHandle[0];
auto port = &link->Ports[m_adapter.EnlPortIndex];
auto queue = &port->RxQueue[0];
WDFVERIFY(queue->State == Stopped);
queue->QueueNext = queue->QueueEnd = 0U;
EnlIndicateQueueState(EnlQueueHandle, Started);
}
void
NetvRxQueue::Stop(
void
)
{
EnlIndicateQueueState(EnlQueueHandle, Stopped);
}
_Use_decl_annotations_
void
NetvRxQueue::Advance(
void
)
{
auto fr = GetFragmentRing();
NET_RING_PACKET_ITERATOR pi = NetRingGetAllPackets(m_rings);
NET_RING_FRAGMENT_ITERATOR fi = NetRingGetAllFragments(m_rings);
// Ideally this would run in EvtQueueStart, but at that point the receive buffers are not
// attached to the fragment yet
if (! CheckedWakeFrame)
{
CheckForWakeFrame(this);
}
// Move begin index forward for all fragments with Scratch == 1, thus returning them to the OS since we're done processing them.
for (; NetFragmentIteratorHasAny(&fi) && NetPacketIteratorHasAny(&pi); NetPacketIteratorAdvance(&pi), NetFragmentIteratorAdvance(&fi))
{
NET_FRAGMENT const * fragment = NetFragmentIteratorGetFragment(&fi);
if (! fragment->Scratch)
{
break;
}
}
NetFragmentIteratorSet(&fi);
NetPacketIteratorSet(&pi);
EnlRingDoorBell(EnlQueueHandle, fr->EndIndex);
}
_Use_decl_annotations_
void
NetvRxQueue::Cancel(
void
)
{
CancelRxPackets(m_rings);
}
_Use_decl_annotations_
void
NetvRxQueue::SetNotify(
bool NotificationEnabled
)
{
EnlArmInterrupt(EnlQueueHandle, NotificationEnabled);
}
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