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86 lines
2.6 KiB
C
86 lines
2.6 KiB
C
/*
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* PROJECT: ReactOS Intel PRO/1000 Driver
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* LICENSE: GPL-2.0-or-later (https://spdx.org/licenses/GPL-2.0-or-later)
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* PURPOSE: Sending packets
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* COPYRIGHT: Copyright 2018 Mark Jansen <mark.jansen@reactos.org>
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* Copyright 2019 Victor Perevertkin <victor.perevertkin@reactos.org>
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*/
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#include "nic.h"
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#include <debug.h>
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static
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NDIS_STATUS
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NICTransmitPacket(
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_In_ PE1000_ADAPTER Adapter,
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_In_ PHYSICAL_ADDRESS PhysicalAddress,
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_In_ ULONG Length)
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{
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volatile PE1000_TRANSMIT_DESCRIPTOR TransmitDescriptor;
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NDIS_DbgPrint(MAX_TRACE, ("Called.\n"));
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TransmitDescriptor = Adapter->TransmitDescriptors + Adapter->CurrentTxDesc;
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TransmitDescriptor->Address = PhysicalAddress.QuadPart;
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TransmitDescriptor->Length = Length;
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TransmitDescriptor->ChecksumOffset = 0;
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TransmitDescriptor->Command = E1000_TDESC_CMD_RS | E1000_TDESC_CMD_IFCS |
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E1000_TDESC_CMD_EOP | E1000_TDESC_CMD_IDE;
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TransmitDescriptor->Status = 0;
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TransmitDescriptor->ChecksumStartField = 0;
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TransmitDescriptor->Special = 0;
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Adapter->CurrentTxDesc = (Adapter->CurrentTxDesc + 1) % NUM_TRANSMIT_DESCRIPTORS;
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E1000WriteUlong(Adapter, E1000_REG_TDT, Adapter->CurrentTxDesc);
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if (Adapter->CurrentTxDesc == Adapter->LastTxDesc)
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{
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NDIS_DbgPrint(MID_TRACE, ("All TX descriptors are full now\n"));
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Adapter->TxFull = TRUE;
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}
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return NDIS_STATUS_SUCCESS;
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}
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NDIS_STATUS
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NTAPI
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MiniportSend(
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_In_ NDIS_HANDLE MiniportAdapterContext,
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_In_ PNDIS_PACKET Packet,
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_In_ UINT Flags)
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{
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PE1000_ADAPTER Adapter = (PE1000_ADAPTER)MiniportAdapterContext;
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PSCATTER_GATHER_LIST sgList;
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ULONG TransmitLength;
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PHYSICAL_ADDRESS TransmitBuffer;
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NDIS_STATUS Status;
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sgList = NDIS_PER_PACKET_INFO_FROM_PACKET(Packet, ScatterGatherListPacketInfo);
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ASSERT(sgList != NULL);
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ASSERT(sgList->NumberOfElements == 1);
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ASSERT((sgList->Elements[0].Address.LowPart & 3) == 0);
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ASSERT(sgList->Elements[0].Length <= MAXIMUM_FRAME_SIZE);
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if (Adapter->TxFull)
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{
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NDIS_DbgPrint(MIN_TRACE, ("All TX descriptors are full\n"));
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return NDIS_STATUS_RESOURCES;
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}
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TransmitLength = sgList->Elements[0].Length;
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TransmitBuffer = sgList->Elements[0].Address;
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Adapter->TransmitPackets[Adapter->CurrentTxDesc] = Packet;
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Status = NICTransmitPacket(Adapter, TransmitBuffer, TransmitLength);
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if (Status != NDIS_STATUS_SUCCESS)
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{
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NDIS_DbgPrint(MIN_TRACE, ("Transmit packet failed\n"));
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return Status;
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}
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return NDIS_STATUS_PENDING;
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}
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