[E1000] Minor improvements (#3904)

[reactos.git] / drivers / network / dd / e1000 / send.c

diff --git a/drivers/network/dd/e1000/send.c b/drivers/network/dd/e1000/send.c
new file mode 100644 (file)
index 0000000..990e8b3
--- /dev/null
+++ b/drivers/network/dd/e1000/send.c
@@ -0,0 +1,85 @@
+/*
+ * PROJECT:     ReactOS Intel PRO/1000 Driver
+ * LICENSE:     GPL-2.0-or-later (https://spdx.org/licenses/GPL-2.0-or-later.html)
+ * PURPOSE:     Sending packets
+ * COPYRIGHT:   Copyright 2018 Mark Jansen <mark.jansen@reactos.org>
+ *              Copyright 2019 Victor Perevertkin <victor.perevertkin@reactos.org>
+ */
+
+#include "nic.h"
+
+#include <debug.h>
+
+static
+NDIS_STATUS
+NICTransmitPacket(
+    _In_ PE1000_ADAPTER Adapter,
+    _In_ PHYSICAL_ADDRESS PhysicalAddress,
+    _In_ ULONG Length)
+{
+    volatile PE1000_TRANSMIT_DESCRIPTOR TransmitDescriptor;
+
+    NDIS_DbgPrint(MAX_TRACE, ("Called.\n"));
+
+    TransmitDescriptor = Adapter->TransmitDescriptors + Adapter->CurrentTxDesc;
+    TransmitDescriptor->Address = PhysicalAddress.QuadPart;
+    TransmitDescriptor->Length = Length;
+    TransmitDescriptor->ChecksumOffset = 0;
+    TransmitDescriptor->Command = E1000_TDESC_CMD_RS | E1000_TDESC_CMD_IFCS |
+                                  E1000_TDESC_CMD_EOP | E1000_TDESC_CMD_IDE;
+    TransmitDescriptor->Status = 0;
+    TransmitDescriptor->ChecksumStartField = 0;
+    TransmitDescriptor->Special = 0;
+
+    Adapter->CurrentTxDesc = (Adapter->CurrentTxDesc + 1) % NUM_TRANSMIT_DESCRIPTORS;
+
+    E1000WriteUlong(Adapter, E1000_REG_TDT, Adapter->CurrentTxDesc);
+
+    if (Adapter->CurrentTxDesc == Adapter->LastTxDesc)
+    {
+        NDIS_DbgPrint(MID_TRACE, ("All TX descriptors are full now\n"));
+        Adapter->TxFull = TRUE;
+    }
+
+    return NDIS_STATUS_SUCCESS;
+}
+
+NDIS_STATUS
+NTAPI
+MiniportSend(
+    _In_ NDIS_HANDLE MiniportAdapterContext,
+    _In_ PNDIS_PACKET Packet,
+    _In_ UINT Flags)
+{
+    PE1000_ADAPTER Adapter = (PE1000_ADAPTER)MiniportAdapterContext;
+    PSCATTER_GATHER_LIST sgList;
+    ULONG TransmitLength;
+    PHYSICAL_ADDRESS TransmitBuffer;
+    NDIS_STATUS Status;
+
+    sgList = NDIS_PER_PACKET_INFO_FROM_PACKET(Packet, ScatterGatherListPacketInfo);
+
+    ASSERT(sgList != NULL);
+    ASSERT(sgList->NumberOfElements == 1);
+    ASSERT((sgList->Elements[0].Address.LowPart & 3) == 0);
+    ASSERT(sgList->Elements[0].Length <= MAXIMUM_FRAME_SIZE);
+
+    if (Adapter->TxFull)
+    {
+        NDIS_DbgPrint(MIN_TRACE, ("All TX descriptors are full\n"));
+        return NDIS_STATUS_RESOURCES;
+    }
+
+    TransmitLength = sgList->Elements[0].Length;
+    TransmitBuffer = sgList->Elements[0].Address;
+    Adapter->TransmitPackets[Adapter->CurrentTxDesc] = Packet;
+
+    Status = NICTransmitPacket(Adapter, TransmitBuffer, TransmitLength);
+    if (Status != NDIS_STATUS_SUCCESS)
+    {
+        NDIS_DbgPrint(MIN_TRACE, ("Transmit packet failed\n"));
+        return Status;
+    }
+
+    return NDIS_STATUS_PENDING;
+}