From: Hank Janssen <hjanssen@xxxxxxxxxxxxx>
This is the virtual network driver when running Linux on top of Hyper-V.
Signed-off-by: Hank Janssen <hjanssen@xxxxxxxxxxxxx>
Signed-off-by: Haiyang Zhang <haiyangz@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
drivers/staging/hv/NetVsc.c | 1499 +++++++++++++++++++++++++++++++++++++++
drivers/staging/hv/NetVsc.h | 91 ++
drivers/staging/hv/RndisFilter.c | 1162 ++++++++++++++++++++++++++++++
drivers/staging/hv/RndisFilter.h | 61 +
drivers/staging/hv/netvsc_drv.c | 720 ++++++++++++++++++
5 files changed, 3533 insertions(+)
create mode 100644 drivers/staging/hv/netvsc.c
--- /dev/null
+++ b/drivers/staging/hv/NetVsc.c
@@ -0,0 +1,1499 @@
+/*
+ *
+ * Copyright (c) 2009, Microsoft Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * Authors:
+ * Hank Janssen <hjanssen@xxxxxxxxxxxxx>
+ *
+ */
+
+
+#include "logging.h"
+#include "NetVsc.h"
+#include "RndisFilter.h"
+
+
+//
+// Globals
+//
+static const char* gDriverName="netvsc";
+
+// {F8615163-DF3E-46c5-913F-F2D2F965ED0E}
+static const GUID gNetVscDeviceType={
+ .Data = {0x63, 0x51, 0x61, 0xF8, 0x3E, 0xDF, 0xc5, 0x46, 0x91, 0x3F, 0xF2, 0xD2, 0xF9, 0x65, 0xED, 0x0E}
+};
+
+
+//
+// Internal routines
+//
+static int
+NetVscOnDeviceAdd(
+ DEVICE_OBJECT *Device,
+ void *AdditionalInfo
+ );
+
+static int
+NetVscOnDeviceRemove(
+ DEVICE_OBJECT *Device
+ );
+
+static void
+NetVscOnCleanup(
+ DRIVER_OBJECT *Driver
+ );
+
+static void
+NetVscOnChannelCallback(
+ PVOID context
+ );
+
+static int
+NetVscInitializeSendBufferWithNetVsp(
+ DEVICE_OBJECT *Device
+ );
+
+static int
+NetVscInitializeReceiveBufferWithNetVsp(
+ DEVICE_OBJECT *Device
+ );
+
+static int
+NetVscDestroySendBuffer(
+ NETVSC_DEVICE *NetDevice
+ );
+
+static int
+NetVscDestroyReceiveBuffer(
+ NETVSC_DEVICE *NetDevice
+ );
+
+static int
+NetVscConnectToVsp(
+ DEVICE_OBJECT *Device
+ );
+
+static void
+NetVscOnSendCompletion(
+ DEVICE_OBJECT *Device,
+ VMPACKET_DESCRIPTOR *Packet
+ );
+
+static int
+NetVscOnSend(
+ DEVICE_OBJECT *Device,
+ NETVSC_PACKET *Packet
+ );
+
+static void
+NetVscOnReceive(
+ DEVICE_OBJECT *Device,
+ VMPACKET_DESCRIPTOR *Packet
+ );
+
+static void
+NetVscOnReceiveCompletion(
+ PVOID Context
+ );
+
+static void
+NetVscSendReceiveCompletion(
+ DEVICE_OBJECT *Device,
+ UINT64 TransactionId
+ );
+
+static inline NETVSC_DEVICE* AllocNetDevice(DEVICE_OBJECT *Device)
+{
+ NETVSC_DEVICE *netDevice;
+
+ netDevice = MemAllocZeroed(sizeof(NETVSC_DEVICE));
+ if (!netDevice)
+ return NULL;
+
+ // Set to 2 to allow both inbound and outbound traffic
+ InterlockedCompareExchange(&netDevice->RefCount, 2, 0);
+
+ netDevice->Device = Device;
+ Device->Extension = netDevice;
+
+ return netDevice;
+}
+
+static inline void FreeNetDevice(NETVSC_DEVICE *Device)
+{
+ ASSERT(Device->RefCount == 0);
+ Device->Device->Extension = NULL;
+ MemFree(Device);
+}
+
+
+// Get the net device object iff exists and its refcount > 1
+static inline NETVSC_DEVICE* GetOutboundNetDevice(DEVICE_OBJECT *Device)
+{
+ NETVSC_DEVICE *netDevice;
+
+ netDevice = (NETVSC_DEVICE*)Device->Extension;
+ if (netDevice && netDevice->RefCount > 1)
+ {
+ InterlockedIncrement(&netDevice->RefCount);
+ }
+ else
+ {
+ netDevice = NULL;
+ }
+
+ return netDevice;
+}
+
+// Get the net device object iff exists and its refcount > 0
+static inline NETVSC_DEVICE* GetInboundNetDevice(DEVICE_OBJECT *Device)
+{
+ NETVSC_DEVICE *netDevice;
+
+ netDevice = (NETVSC_DEVICE*)Device->Extension;
+ if (netDevice && netDevice->RefCount)
+ {
+ InterlockedIncrement(&netDevice->RefCount);
+ }
+ else
+ {
+ netDevice = NULL;
+ }
+
+ return netDevice;
+}
+
+static inline void PutNetDevice(DEVICE_OBJECT *Device)
+{
+ NETVSC_DEVICE *netDevice;
+
+ netDevice = (NETVSC_DEVICE*)Device->Extension;
+ ASSERT(netDevice);
+
+ InterlockedDecrement(&netDevice->RefCount);
+}
+
+static inline NETVSC_DEVICE* ReleaseOutboundNetDevice(DEVICE_OBJECT *Device)
+{
+ NETVSC_DEVICE *netDevice;
+
+ netDevice = (NETVSC_DEVICE*)Device->Extension;
+ if (netDevice == NULL)
+ return NULL;
+
+ // Busy wait until the ref drop to 2, then set it to 1
+ while (InterlockedCompareExchange(&netDevice->RefCount, 1, 2) != 2)
+ {
+ Sleep(100);
+ }
+
+ return netDevice;
+}
+
+static inline NETVSC_DEVICE* ReleaseInboundNetDevice(DEVICE_OBJECT *Device)
+{
+ NETVSC_DEVICE *netDevice;
+
+ netDevice = (NETVSC_DEVICE*)Device->Extension;
+ if (netDevice == NULL)
+ return NULL;
+
+ // Busy wait until the ref drop to 1, then set it to 0
+ while (InterlockedCompareExchange(&netDevice->RefCount, 0, 1) != 1)
+ {
+ Sleep(100);
+ }
+
+ Device->Extension = NULL;
+ return netDevice;
+}
+
+/*++;
+
+
+Name:
+ NetVscInitialize()
+
+Description:
+ Main entry point
+
+--*/
+int
+NetVscInitialize(
+ DRIVER_OBJECT *drv
+ )
+{
+ NETVSC_DRIVER_OBJECT* driver = (NETVSC_DRIVER_OBJECT*)drv;
+ int ret=0;
+
+ DPRINT_ENTER(NETVSC);
+
+ DPRINT_DBG(NETVSC, "sizeof(NETVSC_PACKET)=%d, sizeof(NVSP_MESSAGE)=%d, sizeof(VMTRANSFER_PAGE_PACKET_HEADER)=%d",
+ sizeof(NETVSC_PACKET), sizeof(NVSP_MESSAGE), sizeof(VMTRANSFER_PAGE_PACKET_HEADER));
+
+ // Make sure we are at least 2 pages since 1 page is used for control
+ ASSERT(driver->RingBufferSize >= (PAGE_SIZE << 1));
+
+ drv->name = gDriverName;
+ memcpy(&drv->deviceType, &gNetVscDeviceType, sizeof(GUID));
+
+ // Make sure it is set by the caller
+ ASSERT(driver->OnReceiveCallback);
+ ASSERT(driver->OnLinkStatusChanged);
+
+ // Setup the dispatch table
+ driver->Base.OnDeviceAdd = NetVscOnDeviceAdd;
+ driver->Base.OnDeviceRemove = NetVscOnDeviceRemove;
+ driver->Base.OnCleanup = NetVscOnCleanup;
+
+ driver->OnSend = NetVscOnSend;
+
+ RndisFilterInit(driver);
+
+ DPRINT_EXIT(NETVSC);
+
+ return ret;
+}
+
+static int
+NetVscInitializeReceiveBufferWithNetVsp(
+ DEVICE_OBJECT *Device
+ )
+{
+ int ret=0;
+ NETVSC_DEVICE *netDevice;
+ NVSP_MESSAGE *initPacket;
+
+ DPRINT_ENTER(NETVSC);
+
+ netDevice = GetOutboundNetDevice(Device);
+ if (!netDevice)
+ {
+ DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?");
+ DPRINT_EXIT(NETVSC);
+ return -1;
+ }
+ ASSERT(netDevice->ReceiveBufferSize > 0);
+ ASSERT((netDevice->ReceiveBufferSize & (PAGE_SIZE-1)) == 0); // page-size grandularity
+
+ netDevice->ReceiveBuffer = PageAlloc(netDevice->ReceiveBufferSize >> PAGE_SHIFT);
+ if (!netDevice->ReceiveBuffer)
+ {
+ DPRINT_ERR(NETVSC, "unable to allocate receive buffer of size %d", netDevice->ReceiveBufferSize);
+ ret = -1;
+ goto Cleanup;
+ }
+ ASSERT(((ULONG_PTR)netDevice->ReceiveBuffer & (PAGE_SIZE-1)) == 0); // page-aligned buffer
+
+ DPRINT_INFO(NETVSC, "Establishing receive buffer's GPADL...");
+
+ // Establish the gpadl handle for this buffer on this channel.
+ // Note: This call uses the vmbus connection rather than the channel to establish
+ // the gpadl handle.
+ ret = Device->Driver->VmbusChannelInterface.EstablishGpadl(Device,
+ netDevice->ReceiveBuffer,
+ netDevice->ReceiveBufferSize,
+ &netDevice->ReceiveBufferGpadlHandle);
+
+ if (ret != 0)
+ {
+ DPRINT_ERR(NETVSC, "unable to establish receive buffer's gpadl");
+ goto Cleanup;
+ }
+
+ //WaitEventWait(ext->ChannelInitEvent);
+
+ // Notify the NetVsp of the gpadl handle
+ DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeSendReceiveBuffer...");
+
+ initPacket = &netDevice->ChannelInitPacket;
+
+ memset(initPacket, 0, sizeof(NVSP_MESSAGE));
+
+ initPacket->Header.MessageType = NvspMessage1TypeSendReceiveBuffer;
+ initPacket->Messages.Version1Messages.SendReceiveBuffer.GpadlHandle = netDevice->ReceiveBufferGpadlHandle;
+ initPacket->Messages.Version1Messages.SendReceiveBuffer.Id = NETVSC_RECEIVE_BUFFER_ID;
+
+ // Send the gpadl notification request
+ ret = Device->Driver->VmbusChannelInterface.SendPacket(Device,
+ initPacket,
+ sizeof(NVSP_MESSAGE),
+ (ULONG_PTR)initPacket,
+ VmbusPacketTypeDataInBand,
+ VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
+ if (ret != 0)
+ {
+ DPRINT_ERR(NETVSC, "unable to send receive buffer's gpadl to netvsp");
+ goto Cleanup;
+ }
+
+ WaitEventWait(netDevice->ChannelInitEvent);
+
+ // Check the response
+ if (initPacket->Messages.Version1Messages.SendReceiveBufferComplete.Status != NvspStatusSuccess)
+ {
+ DPRINT_ERR(NETVSC,
+ "Unable to complete receive buffer initialzation with NetVsp - status %d",
+ initPacket->Messages.Version1Messages.SendReceiveBufferComplete.Status);
+ ret = -1;
+ goto Cleanup;
+ }
+
+ // Parse the response
+ ASSERT(netDevice->ReceiveSectionCount == 0);
+ ASSERT(netDevice->ReceiveSections == NULL);
+
+ netDevice->ReceiveSectionCount = initPacket->Messages.Version1Messages.SendReceiveBufferComplete.NumSections;
+
+ netDevice->ReceiveSections = MemAlloc(netDevice->ReceiveSectionCount * sizeof(NVSP_1_RECEIVE_BUFFER_SECTION));
+ if (netDevice->ReceiveSections == NULL)
+ {
+ ret = -1;
+ goto Cleanup;
+ }
+
+ memcpy(netDevice->ReceiveSections,
+ initPacket->Messages.Version1Messages.SendReceiveBufferComplete.Sections,
+ netDevice->ReceiveSectionCount * sizeof(NVSP_1_RECEIVE_BUFFER_SECTION));
+
+ DPRINT_INFO(NETVSC,
+ "Receive sections info (count %d, offset %d, endoffset %d, suballoc size %d, num suballocs %d)",
+ netDevice->ReceiveSectionCount, netDevice->ReceiveSections[0].Offset, netDevice->ReceiveSections[0].EndOffset,
+ netDevice->ReceiveSections[0].SubAllocationSize, netDevice->ReceiveSections[0].NumSubAllocations);
+
+
+ //For 1st release, there should only be 1 section that represents the entire receive buffer
+ if (netDevice->ReceiveSectionCount != 1 ||
+ netDevice->ReceiveSections->Offset != 0 )
+ {
+ ret = -1;
+ goto Cleanup;
+ }
+
+ goto Exit;
+
+Cleanup:
+ NetVscDestroyReceiveBuffer(netDevice);
+
+Exit:
+ PutNetDevice(Device);
+ DPRINT_EXIT(NETVSC);
+ return ret;
+}
+
+
+static int
+NetVscInitializeSendBufferWithNetVsp(
+ DEVICE_OBJECT *Device
+ )
+{
+ int ret=0;
+ NETVSC_DEVICE *netDevice;
+ NVSP_MESSAGE *initPacket;
+
+ DPRINT_ENTER(NETVSC);
+
+ netDevice = GetOutboundNetDevice(Device);
+ if (!netDevice)
+ {
+ DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?");
+ DPRINT_EXIT(NETVSC);
+ return -1;
+ }
+ ASSERT(netDevice->SendBufferSize > 0);
+ ASSERT((netDevice->SendBufferSize & (PAGE_SIZE-1)) == 0); // page-size grandularity
+
+ netDevice->SendBuffer = PageAlloc(netDevice->SendBufferSize >> PAGE_SHIFT);
+ if (!netDevice->SendBuffer)
+ {
+ DPRINT_ERR(NETVSC, "unable to allocate send buffer of size %d", netDevice->SendBufferSize);
+ ret = -1;
+ goto Cleanup;
+ }
+ ASSERT(((ULONG_PTR)netDevice->SendBuffer & (PAGE_SIZE-1)) == 0); // page-aligned buffer
+
+ DPRINT_INFO(NETVSC, "Establishing send buffer's GPADL...");
+
+ // Establish the gpadl handle for this buffer on this channel.
+ // Note: This call uses the vmbus connection rather than the channel to establish
+ // the gpadl handle.
+ ret = Device->Driver->VmbusChannelInterface.EstablishGpadl(Device,
+ netDevice->SendBuffer,
+ netDevice->SendBufferSize,
+ &netDevice->SendBufferGpadlHandle);
+
+ if (ret != 0)
+ {
+ DPRINT_ERR(NETVSC, "unable to establish send buffer's gpadl");
+ goto Cleanup;
+ }
+
+ //WaitEventWait(ext->ChannelInitEvent);
+
+ // Notify the NetVsp of the gpadl handle
+ DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeSendSendBuffer...");
+
+ initPacket = &netDevice->ChannelInitPacket;
+
+ memset(initPacket, 0, sizeof(NVSP_MESSAGE));
+
+ initPacket->Header.MessageType = NvspMessage1TypeSendSendBuffer;
+ initPacket->Messages.Version1Messages.SendReceiveBuffer.GpadlHandle = netDevice->SendBufferGpadlHandle;
+ initPacket->Messages.Version1Messages.SendReceiveBuffer.Id = NETVSC_SEND_BUFFER_ID;
+
+ // Send the gpadl notification request
+ ret = Device->Driver->VmbusChannelInterface.SendPacket(Device,
+ initPacket,
+ sizeof(NVSP_MESSAGE),
+ (ULONG_PTR)initPacket,
+ VmbusPacketTypeDataInBand,
+ VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
+ if (ret != 0)
+ {
+ DPRINT_ERR(NETVSC, "unable to send receive buffer's gpadl to netvsp");
+ goto Cleanup;
+ }
+
+ WaitEventWait(netDevice->ChannelInitEvent);
+
+ // Check the response
+ if (initPacket->Messages.Version1Messages.SendSendBufferComplete.Status != NvspStatusSuccess)
+ {
+ DPRINT_ERR(NETVSC,
+ "Unable to complete send buffer initialzation with NetVsp - status %d",
+ initPacket->Messages.Version1Messages.SendSendBufferComplete.Status);
+ ret = -1;
+ goto Cleanup;
+ }
+
+ netDevice->SendSectionSize = initPacket->Messages.Version1Messages.SendSendBufferComplete.SectionSize;
+
+ goto Exit;
+
+Cleanup:
+ NetVscDestroySendBuffer(netDevice);
+
+Exit:
+ PutNetDevice(Device);
+ DPRINT_EXIT(NETVSC);
+ return ret;
+}
+
+static int
+NetVscDestroyReceiveBuffer(
+ NETVSC_DEVICE *NetDevice
+ )
+{
+ NVSP_MESSAGE *revokePacket;
+ int ret=0;
+
+
+ DPRINT_ENTER(NETVSC);
+
+ // If we got a section count, it means we received a SendReceiveBufferComplete msg
+ // (ie sent NvspMessage1TypeSendReceiveBuffer msg) therefore, we need to send a revoke msg here
+ if (NetDevice->ReceiveSectionCount)
+ {
+ DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeRevokeReceiveBuffer...");
+
+ // Send the revoke receive buffer
+ revokePacket = &NetDevice->RevokePacket;
+ memset(revokePacket, 0, sizeof(NVSP_MESSAGE));
+
+ revokePacket->Header.MessageType = NvspMessage1TypeRevokeReceiveBuffer;
+ revokePacket->Messages.Version1Messages.RevokeReceiveBuffer.Id = NETVSC_RECEIVE_BUFFER_ID;
+
+ ret = NetDevice->Device->Driver->VmbusChannelInterface.SendPacket(NetDevice->Device,
+ revokePacket,
+ sizeof(NVSP_MESSAGE),
+ (ULONG_PTR)revokePacket,
+ VmbusPacketTypeDataInBand,
+ 0);
+ // If we failed here, we might as well return and have a leak rather than continue and a bugchk
+ if (ret != 0)
+ {
+ DPRINT_ERR(NETVSC, "unable to send revoke receive buffer to netvsp");
+ DPRINT_EXIT(NETVSC);
+ return -1;
+ }
+ }
+
+ // Teardown the gpadl on the vsp end
+ if (NetDevice->ReceiveBufferGpadlHandle)
+ {
+ DPRINT_INFO(NETVSC, "Tearing down receive buffer's GPADL...");
+
+ ret = NetDevice->Device->Driver->VmbusChannelInterface.TeardownGpadl(NetDevice->Device,
+ NetDevice->ReceiveBufferGpadlHandle);
+
+ // If we failed here, we might as well return and have a leak rather than continue and a bugchk
+ if (ret != 0)
+ {
+ DPRINT_ERR(NETVSC, "unable to teardown receive buffer's gpadl");
+ DPRINT_EXIT(NETVSC);
+ return -1;
+ }
+ NetDevice->ReceiveBufferGpadlHandle = 0;
+ }
+
+ if (NetDevice->ReceiveBuffer)
+ {
+ DPRINT_INFO(NETVSC, "Freeing up receive buffer...");
+
+ // Free up the receive buffer
+ PageFree(NetDevice->ReceiveBuffer, NetDevice->ReceiveBufferSize >> PAGE_SHIFT);
+ NetDevice->ReceiveBuffer = NULL;
+ }
+
+ if (NetDevice->ReceiveSections)
+ {
+ MemFree(NetDevice->ReceiveSections);
+ NetDevice->ReceiveSections = NULL;
+ NetDevice->ReceiveSectionCount = 0;
+ }
+
+ DPRINT_EXIT(NETVSC);
+
+ return ret;
+}
+
+
+
+
+static int
+NetVscDestroySendBuffer(
+ NETVSC_DEVICE *NetDevice
+ )
+{
+ NVSP_MESSAGE *revokePacket;
+ int ret=0;
+
+
+ DPRINT_ENTER(NETVSC);
+
+ // If we got a section count, it means we received a SendReceiveBufferComplete msg
+ // (ie sent NvspMessage1TypeSendReceiveBuffer msg) therefore, we need to send a revoke msg here
+ if (NetDevice->SendSectionSize)
+ {
+ DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeRevokeSendBuffer...");
+
+ // Send the revoke send buffer
+ revokePacket = &NetDevice->RevokePacket;
+ memset(revokePacket, 0, sizeof(NVSP_MESSAGE));
+
+ revokePacket->Header.MessageType = NvspMessage1TypeRevokeSendBuffer;
+ revokePacket->Messages.Version1Messages.RevokeSendBuffer.Id = NETVSC_SEND_BUFFER_ID;
+
+ ret = NetDevice->Device->Driver->VmbusChannelInterface.SendPacket(NetDevice->Device,
+ revokePacket,
+ sizeof(NVSP_MESSAGE),
+ (ULONG_PTR)revokePacket,
+ VmbusPacketTypeDataInBand,
+ 0);
+ // If we failed here, we might as well return and have a leak rather than continue and a bugchk
+ if (ret != 0)
+ {
+ DPRINT_ERR(NETVSC, "unable to send revoke send buffer to netvsp");
+ DPRINT_EXIT(NETVSC);
+ return -1;
+ }
+ }
+
+ // Teardown the gpadl on the vsp end
+ if (NetDevice->SendBufferGpadlHandle)
+ {
+ DPRINT_INFO(NETVSC, "Tearing down send buffer's GPADL...");
+
+ ret = NetDevice->Device->Driver->VmbusChannelInterface.TeardownGpadl(NetDevice->Device,
+ NetDevice->SendBufferGpadlHandle);
+
+ // If we failed here, we might as well return and have a leak rather than continue and a bugchk
+ if (ret != 0)
+ {
+ DPRINT_ERR(NETVSC, "unable to teardown send buffer's gpadl");
+ DPRINT_EXIT(NETVSC);
+ return -1;
+ }
+ NetDevice->SendBufferGpadlHandle = 0;
+ }
+
+ if (NetDevice->SendBuffer)
+ {
+ DPRINT_INFO(NETVSC, "Freeing up send buffer...");
+
+ // Free up the receive buffer
+ PageFree(NetDevice->SendBuffer, NetDevice->SendBufferSize >> PAGE_SHIFT);
+ NetDevice->SendBuffer = NULL;
+ }
+
+ DPRINT_EXIT(NETVSC);
+
+ return ret;
+}
+
+
+
+static int
+NetVscConnectToVsp(
+ DEVICE_OBJECT *Device
+ )
+{
+ int ret=0;
+ NETVSC_DEVICE *netDevice;
+ NVSP_MESSAGE *initPacket;
+ int ndisVersion;
+
+ DPRINT_ENTER(NETVSC);
+
+ netDevice = GetOutboundNetDevice(Device);
+ if (!netDevice)
+ {
+ DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?");
+ DPRINT_EXIT(NETVSC);
+ return -1;
+ }
+
+ initPacket = &netDevice->ChannelInitPacket;
+
+ memset(initPacket, 0, sizeof(NVSP_MESSAGE));
+ initPacket->Header.MessageType = NvspMessageTypeInit;
+ initPacket->Messages.InitMessages.Init.MinProtocolVersion = NVSP_MIN_PROTOCOL_VERSION;
+ initPacket->Messages.InitMessages.Init.MaxProtocolVersion = NVSP_MAX_PROTOCOL_VERSION;
+
+ DPRINT_INFO(NETVSC, "Sending NvspMessageTypeInit...");
+
+ // Send the init request
+ ret = Device->Driver->VmbusChannelInterface.SendPacket(Device,
+ initPacket,
+ sizeof(NVSP_MESSAGE),
+ (ULONG_PTR)initPacket,
+ VmbusPacketTypeDataInBand,
+ VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
+
+ if( ret != 0)
+ {
+ DPRINT_ERR(NETVSC, "unable to send NvspMessageTypeInit");
+ goto Cleanup;
+ }
+
+ WaitEventWait(netDevice->ChannelInitEvent);
+
+ // Now, check the response
+ //ASSERT(initPacket->Messages.InitMessages.InitComplete.MaximumMdlChainLength <= MAX_MULTIPAGE_BUFFER_COUNT);
+ DPRINT_INFO(NETVSC, "NvspMessageTypeInit status(%d) max mdl chain (%d)",
+ initPacket->Messages.InitMessages.InitComplete.Status,
+ initPacket->Messages.InitMessages.InitComplete.MaximumMdlChainLength);
+
+ if (initPacket->Messages.InitMessages.InitComplete.Status != NvspStatusSuccess)
+ {
+ DPRINT_ERR(NETVSC, "unable to initialize with netvsp (status 0x%x)", initPacket->Messages.InitMessages.InitComplete.Status);
+ ret = -1;
+ goto Cleanup;
+ }
+
+ if (initPacket->Messages.InitMessages.InitComplete.NegotiatedProtocolVersion != NVSP_PROTOCOL_VERSION_1)
+ {
+ DPRINT_ERR(NETVSC, "unable to initialize with netvsp (version expected 1 got %d)",
+ initPacket->Messages.InitMessages.InitComplete.NegotiatedProtocolVersion);
+ ret = -1;
+ goto Cleanup;
+ }
+ DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeSendNdisVersion...");
+
+ // Send the ndis version
+ memset(initPacket, 0, sizeof(NVSP_MESSAGE));
+
+ ndisVersion = 0x00050000;
+
+ initPacket->Header.MessageType = NvspMessage1TypeSendNdisVersion;
+ initPacket->Messages.Version1Messages.SendNdisVersion.NdisMajorVersion = (ndisVersion & 0xFFFF0000) >> 16;
+ initPacket->Messages.Version1Messages.SendNdisVersion.NdisMinorVersion = ndisVersion & 0xFFFF;
+
+ // Send the init request
+ ret = Device->Driver->VmbusChannelInterface.SendPacket(Device,
+ initPacket,
+ sizeof(NVSP_MESSAGE),
+ (ULONG_PTR)initPacket,
+ VmbusPacketTypeDataInBand,
+ 0);
+ if (ret != 0)
+ {
+ DPRINT_ERR(NETVSC, "unable to send NvspMessage1TypeSendNdisVersion");
+ ret = -1;
+ goto Cleanup;
+ }
+ //
+ // BUGBUG - We have to wait for the above msg since the netvsp uses KMCL which acknowledges packet (completion packet)
+ // since our Vmbus always set the VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED flag
+ //WaitEventWait(NetVscChannel->ChannelInitEvent);
+
+ // Post the big receive buffer to NetVSP
+ ret = NetVscInitializeReceiveBufferWithNetVsp(Device);
+ if (ret == 0)
+ {
+ ret = NetVscInitializeSendBufferWithNetVsp(Device);
+ }
+
+Cleanup:
+ PutNetDevice(Device);
+ DPRINT_EXIT(NETVSC);
+ return ret;
+}
+
+static void
+NetVscDisconnectFromVsp(
+ NETVSC_DEVICE *NetDevice
+ )
+{
+ DPRINT_ENTER(NETVSC);
+
+ NetVscDestroyReceiveBuffer(NetDevice);
+ NetVscDestroySendBuffer(NetDevice);
+
+ DPRINT_EXIT(NETVSC);
+}
+
+
+/*++
+
+Name:
+ NetVscOnDeviceAdd()
+
+Description:
+ Callback when the device belonging to this driver is added
+
+--*/
+int
+NetVscOnDeviceAdd(
+ DEVICE_OBJECT *Device,
+ void *AdditionalInfo
+ )
+{
+ int ret=0;
+ int i;
+
+ NETVSC_DEVICE* netDevice;
+ NETVSC_PACKET* packet;
+ LIST_ENTRY *entry;
+
+ NETVSC_DRIVER_OBJECT *netDriver = (NETVSC_DRIVER_OBJECT*) Device->Driver;;
+
+ DPRINT_ENTER(NETVSC);
+
+ netDevice = AllocNetDevice(Device);
+ if (!netDevice)
+ {
+ ret = -1;
+ goto Cleanup;
+ }
+
+ DPRINT_DBG(NETVSC, "netvsc channel object allocated - %p", netDevice);
+
+ // Initialize the NetVSC channel extension
+ netDevice->ReceiveBufferSize = NETVSC_RECEIVE_BUFFER_SIZE;
+ netDevice->ReceivePacketListLock = SpinlockCreate();
+
+ netDevice->SendBufferSize = NETVSC_SEND_BUFFER_SIZE;
+
+ INITIALIZE_LIST_HEAD(&netDevice->ReceivePacketList);
+
+ for (i=0; i < NETVSC_RECEIVE_PACKETLIST_COUNT; i++)
+ {
+ packet = MemAllocZeroed(sizeof(NETVSC_PACKET) + (NETVSC_RECEIVE_SG_COUNT* sizeof(PAGE_BUFFER)));
+ if (!packet)
+ {
+ DPRINT_DBG(NETVSC, "unable to allocate netvsc pkts for receive pool (wanted %d got %d)", NETVSC_RECEIVE_PACKETLIST_COUNT, i);
+ break;
+ }
+
+ INSERT_TAIL_LIST(&netDevice->ReceivePacketList, &packet->ListEntry);
+ }
+ netDevice->ChannelInitEvent = WaitEventCreate();
+
+ // Open the channel
+ ret = Device->Driver->VmbusChannelInterface.Open(Device,
+ netDriver->RingBufferSize,
+ netDriver->RingBufferSize,
+ NULL, 0,
+ NetVscOnChannelCallback,
+ Device
+ );
+
+ if (ret != 0)
+ {
+ DPRINT_ERR(NETVSC, "unable to open channel: %d", ret);
+ ret = -1;
+ goto Cleanup;
+ }
+
+ // Channel is opened
+ DPRINT_INFO(NETVSC, "*** NetVSC channel opened successfully! ***");
+
+ // Connect with the NetVsp
+ ret = NetVscConnectToVsp(Device);
+ if (ret != 0)
+ {
+ DPRINT_ERR(NETVSC, "unable to connect to NetVSP - %d", ret);
+ ret = -1;
+ goto Close;
+ }
+
+ DPRINT_INFO(NETVSC, "*** NetVSC channel handshake result - %d ***", ret);
+
+ DPRINT_EXIT(NETVSC);
+ return ret;
+
+Close:
+ // Now, we can close the channel safely
+ Device->Driver->VmbusChannelInterface.Close(Device);
+
+Cleanup:
+
+ if (netDevice)
+ {
+ WaitEventClose(netDevice->ChannelInitEvent);
+
+ while (!IsListEmpty(&netDevice->ReceivePacketList))
+ {
+ entry = REMOVE_HEAD_LIST(&netDevice->ReceivePacketList);
+ packet = CONTAINING_RECORD(entry, NETVSC_PACKET, ListEntry);
+ MemFree(packet);
+ }
+
+ SpinlockClose(netDevice->ReceivePacketListLock);
+
+ ReleaseOutboundNetDevice(Device);
+ ReleaseInboundNetDevice(Device);
+
+ FreeNetDevice(netDevice);
+ }
+
+ DPRINT_EXIT(NETVSC);
+ return ret;
+}
+
+
+/*++
+
+Name:
+ NetVscOnDeviceRemove()
+
+Description:
+ Callback when the root bus device is removed
+
+--*/
+int
+NetVscOnDeviceRemove(
+ DEVICE_OBJECT *Device
+ )
+{
+ NETVSC_DEVICE *netDevice;
+ NETVSC_PACKET *netvscPacket;
+ int ret=0;
+ LIST_ENTRY *entry;
+
+ DPRINT_ENTER(NETVSC);
+
+ DPRINT_INFO(NETVSC, "Disabling outbound traffic on net device (%p)...", Device->Extension);
+
+ // Stop outbound traffic ie sends and receives completions
+ netDevice = ReleaseOutboundNetDevice(Device);
+ if (!netDevice)
+ {
+ DPRINT_ERR(NETVSC, "No net device present!!");
+ return -1;
+ }
+
+ // Wait for all send completions
+ while (netDevice->NumOutstandingSends)
+ {
+ DPRINT_INFO(NETVSC, "waiting for %d requests to complete...", netDevice->NumOutstandingSends);
+
+ Sleep(100);
+ }
+
+ DPRINT_INFO(NETVSC, "Disconnecting from netvsp...");
+
+ NetVscDisconnectFromVsp(netDevice);
+
+ DPRINT_INFO(NETVSC, "Disabling inbound traffic on net device (%p)...", Device->Extension);
+
+ // Stop inbound traffic ie receives and sends completions
+ netDevice = ReleaseInboundNetDevice(Device);
+
+ // At this point, no one should be accessing netDevice except in here
+ DPRINT_INFO(NETVSC, "net device (%p) safe to remove", netDevice);
+
+ // Now, we can close the channel safely
+ Device->Driver->VmbusChannelInterface.Close(Device);
+
+ // Release all resources
+ while (!IsListEmpty(&netDevice->ReceivePacketList))
+ {
+ entry = REMOVE_HEAD_LIST(&netDevice->ReceivePacketList);
+ netvscPacket = CONTAINING_RECORD(entry, NETVSC_PACKET, ListEntry);
+
+ MemFree(netvscPacket);
+ }
+
+ SpinlockClose(netDevice->ReceivePacketListLock);
+ WaitEventClose(netDevice->ChannelInitEvent);
+ FreeNetDevice(netDevice);
+
+ DPRINT_EXIT(NETVSC);
+ return ret;
+}
+
+
+
+/*++
+
+Name:
+ NetVscOnCleanup()
+
+Description:
+ Perform any cleanup when the driver is removed
+
+--*/
+void
+NetVscOnCleanup(
+ DRIVER_OBJECT *drv
+ )
+{
+ DPRINT_ENTER(NETVSC);
+
+ DPRINT_EXIT(NETVSC);
+}
+
+static void
+NetVscOnSendCompletion(
+ DEVICE_OBJECT *Device,
+ VMPACKET_DESCRIPTOR *Packet
+ )
+{
+ NETVSC_DEVICE* netDevice;
+ NVSP_MESSAGE *nvspPacket;
+ NETVSC_PACKET *nvscPacket;
+
+ DPRINT_ENTER(NETVSC);
+
+ netDevice = GetInboundNetDevice(Device);
+ if (!netDevice)
+ {
+ DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?");
+ DPRINT_EXIT(NETVSC);
+ return;
+ }
+
+ nvspPacket = (NVSP_MESSAGE*)((ULONG_PTR)Packet + (Packet->DataOffset8 << 3));
+
+ DPRINT_DBG(NETVSC, "send completion packet - type %d", nvspPacket->Header.MessageType);
+
+ if (nvspPacket->Header.MessageType == NvspMessageTypeInitComplete ||
+ nvspPacket->Header.MessageType == NvspMessage1TypeSendReceiveBufferComplete ||
+ nvspPacket->Header.MessageType == NvspMessage1TypeSendSendBufferComplete)
+ {
+ // Copy the response back
+ memcpy(&netDevice->ChannelInitPacket, nvspPacket, sizeof(NVSP_MESSAGE));
+ WaitEventSet(netDevice->ChannelInitEvent);
+ }
+ else if (nvspPacket->Header.MessageType == NvspMessage1TypeSendRNDISPacketComplete)
+ {
+ // Get the send context
+ nvscPacket = (NETVSC_PACKET *)(ULONG_PTR)Packet->TransactionId;
+ ASSERT(nvscPacket);
+
+ // Notify the layer above us
+ nvscPacket->Completion.Send.OnSendCompletion(nvscPacket->Completion.Send.SendCompletionContext);
+
+ InterlockedDecrement(&netDevice->NumOutstandingSends);
+ }
+ else
+ {
+ DPRINT_ERR(NETVSC, "Unknown send completion packet type - %d received!!", nvspPacket->Header.MessageType);
+ }
+
+ PutNetDevice(Device);
+ DPRINT_EXIT(NETVSC);
+}
+
+
+
+static int
+NetVscOnSend(
+ DEVICE_OBJECT *Device,
+ NETVSC_PACKET *Packet
+ )
+{
+ NETVSC_DEVICE* netDevice;
+ int ret=0;
+
+ NVSP_MESSAGE sendMessage;
+
+ DPRINT_ENTER(NETVSC);
+
+ netDevice = GetOutboundNetDevice(Device);
+ if (!netDevice)
+ {
+ DPRINT_ERR(NETVSC, "net device (%p) shutting down...ignoring outbound packets", netDevice);
+ DPRINT_EXIT(NETVSC);
+ return -2;
+ }
+
+ sendMessage.Header.MessageType = NvspMessage1TypeSendRNDISPacket;
+ if (Packet->IsDataPacket)
+ sendMessage.Messages.Version1Messages.SendRNDISPacket.ChannelType = 0;// 0 is RMC_DATA;
+ else
+ sendMessage.Messages.Version1Messages.SendRNDISPacket.ChannelType = 1;// 1 is RMC_CONTROL;
+
+ // Not using send buffer section
+ sendMessage.Messages.Version1Messages.SendRNDISPacket.SendBufferSectionIndex = 0xFFFFFFFF;
+ sendMessage.Messages.Version1Messages.SendRNDISPacket.SendBufferSectionSize = 0;
+
+ if (Packet->PageBufferCount)
+ {
+ ret = Device->Driver->VmbusChannelInterface.SendPacketPageBuffer(Device,
+ Packet->PageBuffers,
+ Packet->PageBufferCount,
+ &sendMessage,
+ sizeof(NVSP_MESSAGE),
+ (ULONG_PTR)Packet);
+ }
+ else
+ {
+ ret = Device->Driver->VmbusChannelInterface.SendPacket(Device,
+ &sendMessage,
+ sizeof(NVSP_MESSAGE),
+ (ULONG_PTR)Packet,
+ VmbusPacketTypeDataInBand,
+ VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
+
+ }
+
+ if (ret != 0)
+ {
+ DPRINT_ERR(NETVSC, "Unable to send packet %p ret %d", Packet, ret);
+ }
+
+ InterlockedIncrement(&netDevice->NumOutstandingSends);
+ PutNetDevice(Device);
+
+ DPRINT_EXIT(NETVSC);
+ return ret;
+}
+
+
+static void
+NetVscOnReceive(
+ DEVICE_OBJECT *Device,
+ VMPACKET_DESCRIPTOR *Packet
+ )
+{
+ NETVSC_DEVICE* netDevice;
+ VMTRANSFER_PAGE_PACKET_HEADER *vmxferpagePacket;
+ NVSP_MESSAGE *nvspPacket;
+ NETVSC_PACKET *netvscPacket=NULL;
+ LIST_ENTRY* entry;
+ ULONG_PTR start;
+ ULONG_PTR end, endVirtual;
+ //NETVSC_DRIVER_OBJECT *netvscDriver;
+ XFERPAGE_PACKET *xferpagePacket=NULL;
+ LIST_ENTRY listHead;
+
+ int i=0, j=0;
+ int count=0, bytesRemain=0;
+
+ DPRINT_ENTER(NETVSC);
+
+ netDevice = GetInboundNetDevice(Device);
+ if (!netDevice)
+ {
+ DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?");
+ DPRINT_EXIT(NETVSC);
+ return;
+ }
+
+ // All inbound packets other than send completion should be xfer page packet
+ if (Packet->Type != VmbusPacketTypeDataUsingTransferPages)
+ {
+ DPRINT_ERR(NETVSC, "Unknown packet type received - %d", Packet->Type);
+ PutNetDevice(Device);
+ return;
+ }
+
+ nvspPacket = (NVSP_MESSAGE*)((ULONG_PTR)Packet + (Packet->DataOffset8 << 3));
+
+ // Make sure this is a valid nvsp packet
+ if (nvspPacket->Header.MessageType != NvspMessage1TypeSendRNDISPacket )
+ {
+ DPRINT_ERR(NETVSC, "Unknown nvsp packet type received - %d", nvspPacket->Header.MessageType);
+ PutNetDevice(Device);
+ return;
+ }
+
+ DPRINT_DBG(NETVSC, "NVSP packet received - type %d", nvspPacket->Header.MessageType);
+
+ vmxferpagePacket = (VMTRANSFER_PAGE_PACKET_HEADER*)Packet;
+
+ if (vmxferpagePacket->TransferPageSetId != NETVSC_RECEIVE_BUFFER_ID)
+ {
+ DPRINT_ERR(NETVSC, "Invalid xfer page set id - expecting %x got %x", NETVSC_RECEIVE_BUFFER_ID, vmxferpagePacket->TransferPageSetId);
+ PutNetDevice(Device);
+ return;
+ }
+
+ DPRINT_DBG(NETVSC, "xfer page - range count %d", vmxferpagePacket->RangeCount);
+
+ INITIALIZE_LIST_HEAD(&listHead);
+
+ // Grab free packets (range count + 1) to represent this xfer page packet. +1 to represent
+ // the xfer page packet itself. We grab it here so that we know exactly how many we can fulfil
+ SpinlockAcquire(netDevice->ReceivePacketListLock);
+ while (!IsListEmpty(&netDevice->ReceivePacketList))
+ {
+ entry = REMOVE_HEAD_LIST(&netDevice->ReceivePacketList);
+ netvscPacket = CONTAINING_RECORD(entry, NETVSC_PACKET, ListEntry);
+
+ INSERT_TAIL_LIST(&listHead, &netvscPacket->ListEntry);
+
+ if (++count == vmxferpagePacket->RangeCount + 1)
+ break;
+ }
+ SpinlockRelease(netDevice->ReceivePacketListLock);
+
+ // We need at least 2 netvsc pkts (1 to represent the xfer page and at least 1 for the range)
+ // i.e. we can handled some of the xfer page packet ranges...
+ if (count < 2)
+ {
+ DPRINT_ERR(NETVSC, "Got only %d netvsc pkt...needed %d pkts. Dropping this xfer page packet completely!", count, vmxferpagePacket->RangeCount+1);
+
+ // Return it to the freelist
+ SpinlockAcquire(netDevice->ReceivePacketListLock);
+ for (i=count; i != 0; i--)
+ {
+ entry = REMOVE_HEAD_LIST(&listHead);
+ netvscPacket = CONTAINING_RECORD(entry, NETVSC_PACKET, ListEntry);
+
+ INSERT_TAIL_LIST(&netDevice->ReceivePacketList, &netvscPacket->ListEntry);
+ }
+ SpinlockRelease(netDevice->ReceivePacketListLock);
+
+ NetVscSendReceiveCompletion(Device, vmxferpagePacket->d.TransactionId);
+
+ PutNetDevice(Device);
+ return;
+ }
+
+ // Remove the 1st packet to represent the xfer page packet itself
+ entry = REMOVE_HEAD_LIST(&listHead);
+ xferpagePacket = CONTAINING_RECORD(entry, XFERPAGE_PACKET, ListEntry);
+ xferpagePacket->Count = count - 1; // This is how much we can satisfy
+ ASSERT(xferpagePacket->Count > 0 && xferpagePacket->Count <= vmxferpagePacket->RangeCount);
+
+ if (xferpagePacket->Count != vmxferpagePacket->RangeCount)
+ {
+ DPRINT_INFO(NETVSC, "Needed %d netvsc pkts to satisy this xfer page...got %d", vmxferpagePacket->RangeCount, xferpagePacket->Count);
+ }
+
+ // Each range represents 1 RNDIS pkt that contains 1 ethernet frame
+ for (i=0; i < (count - 1); i++)
+ {
+ entry = REMOVE_HEAD_LIST(&listHead);
+ netvscPacket = CONTAINING_RECORD(entry, NETVSC_PACKET, ListEntry);
+
+ // Initialize the netvsc packet
+ netvscPacket->XferPagePacket = xferpagePacket;
+ netvscPacket->Completion.Recv.OnReceiveCompletion = NetVscOnReceiveCompletion;
+ netvscPacket->Completion.Recv.ReceiveCompletionContext = netvscPacket;
+ netvscPacket->Device = Device;
+ netvscPacket->Completion.Recv.ReceiveCompletionTid = vmxferpagePacket->d.TransactionId; // Save this so that we can send it back
+
+ netvscPacket->TotalDataBufferLength = vmxferpagePacket->Ranges[i].ByteCount;
+ netvscPacket->PageBufferCount = 1;
+
+ ASSERT(vmxferpagePacket->Ranges[i].ByteOffset + vmxferpagePacket->Ranges[i].ByteCount < netDevice->ReceiveBufferSize);
+
+ netvscPacket->PageBuffers[0].Length = vmxferpagePacket->Ranges[i].ByteCount;
+
+ start = GetPhysicalAddress((void*)((ULONG_PTR)netDevice->ReceiveBuffer + vmxferpagePacket->Ranges[i].ByteOffset));
+
+ netvscPacket->PageBuffers[0].Pfn = start >> PAGE_SHIFT;
+ endVirtual = (ULONG_PTR)netDevice->ReceiveBuffer
+ + vmxferpagePacket->Ranges[i].ByteOffset
+ + vmxferpagePacket->Ranges[i].ByteCount -1;
+ end = GetPhysicalAddress((void*)endVirtual);
+
+ // Calculate the page relative offset
+ netvscPacket->PageBuffers[0].Offset = vmxferpagePacket->Ranges[i].ByteOffset & (PAGE_SIZE -1);
+ if ((end >> PAGE_SHIFT) != (start>>PAGE_SHIFT)) {
+ //Handle frame across multiple pages:
+ netvscPacket->PageBuffers[0].Length =
+ (netvscPacket->PageBuffers[0].Pfn <<PAGE_SHIFT) + PAGE_SIZE - start;
+ bytesRemain = netvscPacket->TotalDataBufferLength - netvscPacket->PageBuffers[0].Length;
+ for (j=1; j<NETVSC_PACKET_MAXPAGE; j++) {
+ netvscPacket->PageBuffers[j].Offset = 0;
+ if (bytesRemain <= PAGE_SIZE) {
+ netvscPacket->PageBuffers[j].Length = bytesRemain;
+ bytesRemain = 0;
+ } else {
+ netvscPacket->PageBuffers[j].Length = PAGE_SIZE;
+ bytesRemain -= PAGE_SIZE;
+ }
+ netvscPacket->PageBuffers[j].Pfn =
+ GetPhysicalAddress((void*)(endVirtual - bytesRemain)) >> PAGE_SHIFT;
+ netvscPacket->PageBufferCount++;
+ if (bytesRemain == 0)
+ break;
+ }
+ ASSERT(bytesRemain == 0);
+ }
+ DPRINT_DBG(NETVSC, "[%d] - (abs offset %u len %u) => (pfn %llx, offset %u, len %u)",
+ i,
+ vmxferpagePacket->Ranges[i].ByteOffset,
+ vmxferpagePacket->Ranges[i].ByteCount,
+ netvscPacket->PageBuffers[0].Pfn,
+ netvscPacket->PageBuffers[0].Offset,
+ netvscPacket->PageBuffers[0].Length);
+
+ // Pass it to the upper layer
+ ((NETVSC_DRIVER_OBJECT*)Device->Driver)->OnReceiveCallback(Device, netvscPacket);
+
+ NetVscOnReceiveCompletion(netvscPacket->Completion.Recv.ReceiveCompletionContext);
+ }
+
+ ASSERT(IsListEmpty(&listHead));
+
+ PutNetDevice(Device);
+ DPRINT_EXIT(NETVSC);
+}
+
+
+static void
+NetVscSendReceiveCompletion(
+ DEVICE_OBJECT *Device,
+ UINT64 TransactionId
+ )
+{
+ NVSP_MESSAGE recvcompMessage;
+ int retries=0;
+ int ret=0;
+
+ DPRINT_DBG(NETVSC, "Sending receive completion pkt - %llx", TransactionId);
+
+ recvcompMessage.Header.MessageType = NvspMessage1TypeSendRNDISPacketComplete;
+
+ // FIXME: Pass in the status
+ recvcompMessage.Messages.Version1Messages.SendRNDISPacketComplete.Status = NvspStatusSuccess;
+
+retry_send_cmplt:
+ // Send the completion
+ ret = Device->Driver->VmbusChannelInterface.SendPacket(Device,
+ &recvcompMessage,
+ sizeof(NVSP_MESSAGE),
+ TransactionId,
+ VmbusPacketTypeCompletion,
+ 0);
+ if (ret == 0) // success
+ {
+ // no-op
+ }
+ else if (ret == -1) // no more room...wait a bit and attempt to retry 3 times
+ {
+ retries++;
+ DPRINT_ERR(NETVSC, "unable to send receive completion pkt (tid %llx)...retrying %d", TransactionId, retries);
+
+ if (retries < 4)
+ {
+ Sleep(100);
+ goto retry_send_cmplt;
+ }
+ else
+ {
+ DPRINT_ERR(NETVSC, "unable to send receive completion pkt (tid %llx)...give up retrying", TransactionId);
+ }
+ }
+ else
+ {
+ DPRINT_ERR(NETVSC, "unable to send receive completion pkt - %llx", TransactionId);
+ }
+}
+
+//
+// Send a receive completion packet to RNDIS device (ie NetVsp)
+//
+static void
+NetVscOnReceiveCompletion(
+ PVOID Context)
+{
+ NETVSC_PACKET *packet = (NETVSC_PACKET*)Context;
+ DEVICE_OBJECT *device = (DEVICE_OBJECT*)packet->Device;
+ NETVSC_DEVICE* netDevice;
+ UINT64 transactionId=0;
+ BOOL fSendReceiveComp = FALSE;
+
+ DPRINT_ENTER(NETVSC);
+
+ ASSERT(packet->XferPagePacket);
+
+ // Even though it seems logical to do a GetOutboundNetDevice() here to send out receive completion,
+ // we are using GetInboundNetDevice() since we may have disable outbound traffic already.
+ netDevice = GetInboundNetDevice(device);
+ if (!netDevice)
+ {
+ DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?");
+ DPRINT_EXIT(NETVSC);
+ return;
+ }
+
+ // Overloading use of the lock.
+ SpinlockAcquire(netDevice->ReceivePacketListLock);
+
+ ASSERT(packet->XferPagePacket->Count > 0);
+ packet->XferPagePacket->Count--;
+
+ // Last one in the line that represent 1 xfer page packet.
+ // Return the xfer page packet itself to the freelist
+ if (packet->XferPagePacket->Count == 0)
+ {
+ fSendReceiveComp = TRUE;
+ transactionId = packet->Completion.Recv.ReceiveCompletionTid;
+
+ INSERT_TAIL_LIST(&netDevice->ReceivePacketList, &packet->XferPagePacket->ListEntry);
+ }
+
+ // Put the packet back
+ INSERT_TAIL_LIST(&netDevice->ReceivePacketList, &packet->ListEntry);
+ SpinlockRelease(netDevice->ReceivePacketListLock);
+
+ // Send a receive completion for the xfer page packet
+ if (fSendReceiveComp)
+ {
+ NetVscSendReceiveCompletion(device, transactionId);
+ }
+
+ PutNetDevice(device);
+ DPRINT_EXIT(NETVSC);
+}
+
+
+
+void
+NetVscOnChannelCallback(
+ PVOID Context
+ )
+{
+ const int netPacketSize=2048;
+ int ret=0;
+ DEVICE_OBJECT *device=(DEVICE_OBJECT*)Context;
+ NETVSC_DEVICE *netDevice;
+
+ UINT32 bytesRecvd;
+ UINT64 requestId;
+ UCHAR packet[netPacketSize];
+ VMPACKET_DESCRIPTOR *desc;
+ UCHAR *buffer=packet;
+ int bufferlen=netPacketSize;
+
+
+ DPRINT_ENTER(NETVSC);
+
+ ASSERT(device);
+
+ netDevice = GetInboundNetDevice(device);
+ if (!netDevice)
+ {
+ DPRINT_ERR(NETVSC, "net device (%p) shutting down...ignoring inbound packets", netDevice);
+ DPRINT_EXIT(NETVSC);
+ return;
+ }
+
+ do
+ {
+ ret = device->Driver->VmbusChannelInterface.RecvPacketRaw(device,
+ buffer,
+ bufferlen,
+ &bytesRecvd,
+ &requestId);
+
+ if (ret == 0)
+ {
+ if (bytesRecvd > 0)
+ {
+ DPRINT_DBG(NETVSC, "receive %d bytes, tid %llx", bytesRecvd, requestId);
+
+ desc = (VMPACKET_DESCRIPTOR*)buffer;
+ switch (desc->Type)
+ {
+ case VmbusPacketTypeCompletion:
+ NetVscOnSendCompletion(device, desc);
+ break;
+
+ case VmbusPacketTypeDataUsingTransferPages:
+ NetVscOnReceive(device, desc);
+ break;
+
+ default:
+ DPRINT_ERR(NETVSC, "unhandled packet type %d, tid %llx len %d\n", desc->Type, requestId, bytesRecvd);
+ break;
+ }
+
+ // reset
+ if (bufferlen > netPacketSize)
+ {
+ MemFree(buffer);
+
+ buffer = packet;
+ bufferlen = netPacketSize;
+ }
+ }
+ else
+ {
+ //DPRINT_DBG(NETVSC, "nothing else to read...");
+
+ // reset
+ if (bufferlen > netPacketSize)
+ {
+ MemFree(buffer);
+
+ buffer = packet;
+ bufferlen = netPacketSize;
+ }
+
+ break;
+ }
+ }
+ else if (ret == -2) // Handle large packet
+ {
+ buffer = MemAllocAtomic(bytesRecvd);
+ if (buffer == NULL)
+ {
+ // Try again next time around
+ DPRINT_ERR(NETVSC, "unable to allocate buffer of size (%d)!!", bytesRecvd);
+ break;
+ }
+
+ bufferlen = bytesRecvd;
+ }
+ else
+ {
+ ASSERT(0);
+ }
+ } while (1);
+
+ PutNetDevice(device);
+ DPRINT_EXIT(NETVSC);
+ return;
+}
--- /dev/null
+++ b/drivers/staging/hv/netvsc_drv.c
@@ -0,0 +1,720 @@
+/*
+ *
+ * Copyright (c) 2009, Microsoft Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * Authors:
+ * Hank Janssen <hjanssen@xxxxxxxxxxxxx>
+ *
+ */
+
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/highmem.h>
+#include <linux/device.h>
+#if defined(KERNEL_2_6_5) || defined(KERNEL_2_6_9)
+#include <asm/io.h>
+#else
+#include <linux/io.h>
+#endif
+#include <linux/delay.h>
+#include <linux/netdevice.h>
+#include <linux/inetdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/in.h>
+#include <net/arp.h>
+#include <net/route.h>
+#include <net/sock.h>
+#include <net/pkt_sched.h>
+
+#include "logging.h"
+#include "vmbus.h"
+
+#include "NetVscApi.h"
+
+MODULE_LICENSE("GPL");
+
+//
+// Static decl
+//
+static int netvsc_probe(struct device *device);
+static int netvsc_remove(struct device *device);
+static int netvsc_open(struct net_device *net);
+static void netvsc_xmit_completion(void *context);
+static int netvsc_start_xmit (struct sk_buff *skb, struct net_device *net);
+static int netvsc_recv_callback(DEVICE_OBJECT *device_obj, NETVSC_PACKET* Packet);
+static int netvsc_close(struct net_device *net);
+static struct net_device_stats *netvsc_get_stats(struct net_device *net);
+static void netvsc_linkstatus_callback(DEVICE_OBJECT *device_obj, unsigned int status);
+
+//
+// Data types
+//
+struct net_device_context {
+ struct device_context *device_ctx; // point back to our device context
+ struct net_device_stats stats;
+};
+
+struct netvsc_driver_context {
+ // !! These must be the first 2 fields !!
+ struct driver_context drv_ctx;
+ NETVSC_DRIVER_OBJECT drv_obj;
+};
+
+//
+// Globals
+//
+
+static int netvsc_ringbuffer_size = NETVSC_DEVICE_RING_BUFFER_SIZE;
+
+// The one and only one
+static struct netvsc_driver_context g_netvsc_drv;
+
+//
+// Routines
+//
+
+/*++
+
+Name: netvsc_drv_init()
+
+Desc: NetVsc driver initialization
+
+--*/
+int netvsc_drv_init(PFN_DRIVERINITIALIZE pfn_drv_init)
+{
+ int ret=0;
+ NETVSC_DRIVER_OBJECT *net_drv_obj=&g_netvsc_drv.drv_obj;
+ struct driver_context *drv_ctx=&g_netvsc_drv.drv_ctx;
+
+ DPRINT_ENTER(NETVSC_DRV);
+
+ vmbus_get_interface(&net_drv_obj->Base.VmbusChannelInterface);
+
+ net_drv_obj->RingBufferSize = netvsc_ringbuffer_size;
+ net_drv_obj->OnReceiveCallback = netvsc_recv_callback;
+ net_drv_obj->OnLinkStatusChanged = netvsc_linkstatus_callback;
+
+ // Callback to client driver to complete the initialization
+ pfn_drv_init(&net_drv_obj->Base);
+
+ drv_ctx->driver.name = net_drv_obj->Base.name;
+ memcpy(&drv_ctx->class_id, &net_drv_obj->Base.deviceType, sizeof(GUID));
+
+#if defined(KERNEL_2_6_5) || defined(KERNEL_2_6_9)
+ drv_ctx->driver.probe = netvsc_probe;
+ drv_ctx->driver.remove = netvsc_remove;
+#else
+ drv_ctx->probe = netvsc_probe;
+ drv_ctx->remove = netvsc_remove;
+#endif
+
+ // The driver belongs to vmbus
+ vmbus_child_driver_register(drv_ctx);
+
+ DPRINT_EXIT(NETVSC_DRV);
+
+ return ret;
+}
+
+/*++
+
+Name: netvsc_get_stats()
+
+Desc: Get the network stats
+
+--*/
+static struct net_device_stats *netvsc_get_stats(struct net_device *net)
+{
+ struct net_device_context *net_device_ctx = netdev_priv(net);
+
+ return &net_device_ctx->stats;
+}
+
+/*++
+
+Name: netvsc_set_multicast_list()
+
+Desc: Set the multicast list
+
+Remark: No-op here
+--*/
+static void netvsc_set_multicast_list(UNUSED_VAR(struct net_device *net))
+{
+}
+
+
+/*++
+
+Name: netvsc_probe()
+
+Desc: Add the specified new device to this driver
+
+--*/
+static int netvsc_probe(struct device *device)
+{
+ int ret=0;
+
+ struct driver_context *driver_ctx = driver_to_driver_context(device->driver);
+ struct netvsc_driver_context *net_drv_ctx = (struct netvsc_driver_context*)driver_ctx;
+ NETVSC_DRIVER_OBJECT *net_drv_obj = &net_drv_ctx->drv_obj;
+
+ struct device_context *device_ctx = device_to_device_context(device);
+ DEVICE_OBJECT *device_obj = &device_ctx->device_obj;
+
+ struct net_device *net = NULL;
+ struct net_device_context *net_device_ctx;
+ NETVSC_DEVICE_INFO device_info;
+
+ DPRINT_ENTER(NETVSC_DRV);
+
+ if (!net_drv_obj->Base.OnDeviceAdd)
+ {
+ return -1;
+ }
+
+ net = alloc_netdev(sizeof(struct net_device_context), "seth%d", ether_setup);
+ //net = alloc_etherdev(sizeof(struct net_device_context));
+ if (!net)
+ {
+ return -1;
+ }
+
+ // Set initial state
+ netif_carrier_off(net);
+ netif_stop_queue(net);
+
+ net_device_ctx = netdev_priv(net);
+ net_device_ctx->device_ctx = device_ctx;
+ device->driver_data = net;
+
+ // Notify the netvsc driver of the new device
+ ret = net_drv_obj->Base.OnDeviceAdd(device_obj, (void*)&device_info);
+ if (ret != 0)
+ {
+ free_netdev(net);
+ device->driver_data = NULL;
+
+ DPRINT_ERR(NETVSC_DRV, "unable to add netvsc device (ret %d)", ret);
+ return ret;
+ }
+
+ // If carrier is still off ie we did not get a link status callback, update it if necessary
+ // FIXME: We should use a atomic or test/set instead to avoid getting out of sync with the device's link status
+ if (!netif_carrier_ok(net))
+ {
+ if (!device_info.LinkState)
+ {
+ netif_carrier_on(net);
+ }
+ }
+
+ memcpy(net->dev_addr, device_info.MacAddr, ETH_ALEN);
+
+ net->open = netvsc_open;
+ net->hard_start_xmit = netvsc_start_xmit;
+ net->stop = netvsc_close;
+ net->get_stats = netvsc_get_stats;
+ net->set_multicast_list = netvsc_set_multicast_list;
+
+#if !defined(KERNEL_2_6_27)
+ SET_MODULE_OWNER(net);
+#endif
+ SET_NETDEV_DEV(net, device);
+
+ ret = register_netdev(net);
+ if (ret != 0)
+ {
+ // Remove the device and release the resource
+ net_drv_obj->Base.OnDeviceRemove(device_obj);
+ free_netdev(net);
+ }
+
+ DPRINT_EXIT(NETVSC_DRV);
+
+ return ret;
+}
+
+static int netvsc_remove(struct device *device)
+{
+ int ret=0;
+ struct driver_context *driver_ctx = driver_to_driver_context(device->driver);
+ struct netvsc_driver_context *net_drv_ctx = (struct netvsc_driver_context*)driver_ctx;
+ NETVSC_DRIVER_OBJECT *net_drv_obj = &net_drv_ctx->drv_obj;
+
+ struct device_context *device_ctx = device_to_device_context(device);
+ struct net_device *net = (struct net_device *)device_ctx->device.driver_data;
+ DEVICE_OBJECT *device_obj = &device_ctx->device_obj;
+
+ DPRINT_ENTER(NETVSC_DRV);
+
+ if (net == NULL)
+ {
+ DPRINT_INFO(NETVSC, "no net device to remove");
+ DPRINT_EXIT(NETVSC_DRV);
+ return 0;
+ }
+
+ if (!net_drv_obj->Base.OnDeviceRemove)
+ {
+ DPRINT_EXIT(NETVSC_DRV);
+ return -1;
+ }
+
+ // Stop outbound asap
+ netif_stop_queue(net);
+ //netif_carrier_off(net);
+
+ unregister_netdev(net);
+
+ // Call to the vsc driver to let it know that the device is being removed
+ ret = net_drv_obj->Base.OnDeviceRemove(device_obj);
+ if (ret != 0)
+ {
+ // TODO:
+ DPRINT_ERR(NETVSC, "unable to remove vsc device (ret %d)", ret);
+ }
+
+ free_netdev(net);
+
+ DPRINT_EXIT(NETVSC_DRV);
+
+ return ret;
+}
+
+/*++
+
+Name: netvsc_open()
+
+Desc: Open the specified interface device
+
+--*/
+static int netvsc_open(struct net_device *net)
+{
+ int ret=0;
+ struct net_device_context *net_device_ctx = netdev_priv(net);
+ struct driver_context *driver_ctx = driver_to_driver_context(net_device_ctx->device_ctx->device.driver);
+ struct netvsc_driver_context *net_drv_ctx = (struct netvsc_driver_context*)driver_ctx;
+ NETVSC_DRIVER_OBJECT *net_drv_obj = &net_drv_ctx->drv_obj;
+
+ DEVICE_OBJECT *device_obj = &net_device_ctx->device_ctx->device_obj;
+
+ DPRINT_ENTER(NETVSC_DRV);
+
+ if (netif_carrier_ok(net))
+ {
+ memset(&net_device_ctx->stats, 0 , sizeof(struct net_device_stats));
+
+ // Open up the device
+ ret = net_drv_obj->OnOpen(device_obj);
+ if (ret != 0)
+ {
+ DPRINT_ERR(NETVSC_DRV, "unable to open device (ret %d).", ret);
+ return ret;
+ }
+
+ netif_start_queue(net);
+ }
+ else
+ {
+ DPRINT_ERR(NETVSC_DRV, "unable to open device...link is down.");
+ }
+
+ DPRINT_EXIT(NETVSC_DRV);
+ return ret;
+}
+
+/*++
+
+Name: netvsc_close()
+
+Desc: Close the specified interface device
+
+--*/
+static int netvsc_close(struct net_device *net)
+{
+ int ret=0;
+ struct net_device_context *net_device_ctx = netdev_priv(net);
+ struct driver_context *driver_ctx = driver_to_driver_context(net_device_ctx->device_ctx->device.driver);
+ struct netvsc_driver_context *net_drv_ctx = (struct netvsc_driver_context*)driver_ctx;
+ NETVSC_DRIVER_OBJECT *net_drv_obj = &net_drv_ctx->drv_obj;
+
+ DEVICE_OBJECT *device_obj = &net_device_ctx->device_ctx->device_obj;
+
+ DPRINT_ENTER(NETVSC_DRV);
+
+ netif_stop_queue(net);
+
+ ret = net_drv_obj->OnClose(device_obj);
+ if (ret != 0)
+ {
+ DPRINT_ERR(NETVSC_DRV, "unable to close device (ret %d).", ret);
+ }
+
+ DPRINT_EXIT(NETVSC_DRV);
+
+ return ret;
+}
+
+
+/*++
+
+Name: netvsc_xmit_completion()
+
+Desc: Send completion processing
+
+--*/
+static void netvsc_xmit_completion(void *context)
+{
+ NETVSC_PACKET *packet = (NETVSC_PACKET *)context;
+ struct sk_buff *skb = (struct sk_buff *)(ULONG_PTR)packet->Completion.Send.SendCompletionTid;
+ struct net_device* net;
+
+ DPRINT_ENTER(NETVSC_DRV);
+
+ kfree(packet);
+
+ if (skb)
+ {
+ net = skb->dev;
+
+ dev_kfree_skb_any(skb);
+
+ if (netif_queue_stopped(net))
+ {
+ DPRINT_INFO(NETVSC_DRV, "net device (%p) waking up...", net);
+
+ netif_wake_queue(net);
+ }
+ }
+
+ DPRINT_EXIT(NETVSC_DRV);
+}
+
+/*++
+
+Name: netvsc_start_xmit()
+
+Desc: Start a send
+
+--*/
+static int netvsc_start_xmit (struct sk_buff *skb, struct net_device *net)
+{
+ int ret=0;
+ struct net_device_context *net_device_ctx = netdev_priv(net);
+ struct driver_context *driver_ctx = driver_to_driver_context(net_device_ctx->device_ctx->device.driver);
+ struct netvsc_driver_context *net_drv_ctx = (struct netvsc_driver_context*)driver_ctx;
+ NETVSC_DRIVER_OBJECT *net_drv_obj = &net_drv_ctx->drv_obj;
+
+ int i=0;
+ NETVSC_PACKET* packet;
+ int num_frags;
+ int retries=0;
+
+ DPRINT_ENTER(NETVSC_DRV);
+
+ // Support only 1 chain of frags
+ ASSERT(skb_shinfo(skb)->frag_list == NULL);
+ ASSERT(skb->dev == net);
+
+ DPRINT_DBG(NETVSC_DRV, "xmit packet - len %d data_len %d", skb->len, skb->data_len);
+
+ // Add 1 for skb->data and any additional ones requested
+ num_frags = skb_shinfo(skb)->nr_frags + 1 + net_drv_obj->AdditionalRequestPageBufferCount;
+
+ // Allocate a netvsc packet based on # of frags.
+ packet = kzalloc(sizeof(NETVSC_PACKET) + (num_frags * sizeof(PAGE_BUFFER)) + net_drv_obj->RequestExtSize, GFP_ATOMIC);
+ if (!packet)
+ {
+ DPRINT_ERR(NETVSC_DRV, "unable to allocate NETVSC_PACKET");
+ return -1;
+ }
+
+ packet->Extension = (void*)(unsigned long)packet + sizeof(NETVSC_PACKET) + (num_frags * sizeof(PAGE_BUFFER)) ;
+
+ // Setup the rndis header
+ packet->PageBufferCount = num_frags;
+
+ // TODO: Flush all write buffers/ memory fence ???
+ //wmb();
+
+ // Initialize it from the skb
+ ASSERT(skb->data);
+ packet->TotalDataBufferLength = skb->len;
+
+ // Start filling in the page buffers starting at AdditionalRequestPageBufferCount offset
+ packet->PageBuffers[net_drv_obj->AdditionalRequestPageBufferCount].Pfn = virt_to_phys(skb->data) >> PAGE_SHIFT;
+ packet->PageBuffers[net_drv_obj->AdditionalRequestPageBufferCount].Offset = (unsigned long)skb->data & (PAGE_SIZE -1);
+ packet->PageBuffers[net_drv_obj->AdditionalRequestPageBufferCount].Length = skb->len - skb->data_len;
+
+ ASSERT((skb->len - skb->data_len) <= PAGE_SIZE);
+
+ for (i=net_drv_obj->AdditionalRequestPageBufferCount+1; i<num_frags; i++)
+ {
+ packet->PageBuffers[i].Pfn = page_to_pfn(skb_shinfo(skb)->frags[i-(net_drv_obj->AdditionalRequestPageBufferCount+1)].page);
+ packet->PageBuffers[i].Offset = skb_shinfo(skb)->frags[i-(net_drv_obj->AdditionalRequestPageBufferCount+1)].page_offset;
+ packet->PageBuffers[i].Length = skb_shinfo(skb)->frags[i-(net_drv_obj->AdditionalRequestPageBufferCount+1)].size;
+ }
+
+ // Set the completion routine
+ packet->Completion.Send.OnSendCompletion = netvsc_xmit_completion;
+ packet->Completion.Send.SendCompletionContext = packet;
+ packet->Completion.Send.SendCompletionTid = (ULONG_PTR)skb;
+
+retry_send:
+ ret = net_drv_obj->OnSend(&net_device_ctx->device_ctx->device_obj, packet);
+
+ if (ret == 0)
+ {
+#ifdef KERNEL_2_6_5
+#define NETDEV_TX_OK 0
+#define NETDEV_TX_BUSY 0
+#endif
+ ret = NETDEV_TX_OK;
+ net_device_ctx->stats.tx_bytes += skb->len;
+ net_device_ctx->stats.tx_packets++;
+ }
+ else
+ {
+ retries++;
+ if (retries < 4)
+ {
+ DPRINT_ERR(NETVSC_DRV, "unable to send...retrying %d...", retries);
+ udelay(100);
+ goto retry_send;
+ }
+
+ // no more room or we are shutting down
+ DPRINT_ERR(NETVSC_DRV, "unable to send (%d)...marking net device (%p) busy", ret, net);
+ DPRINT_INFO(NETVSC_DRV, "net device (%p) stopping", net);
+
+ ret = NETDEV_TX_BUSY;
+ net_device_ctx->stats.tx_dropped++;
+
+ netif_stop_queue(net);
+
+ // Null it since the caller will free it instead of the completion routine
+ packet->Completion.Send.SendCompletionTid = 0;
+
+ // Release the resources since we will not get any send completion
+ netvsc_xmit_completion((void*)packet);
+ }
+
+ DPRINT_DBG(NETVSC_DRV, "# of xmits %lu total size %lu", net_device_ctx->stats.tx_packets, net_device_ctx->stats.tx_bytes);
+
+ DPRINT_EXIT(NETVSC_DRV);
+ return ret;
+}
+
+
+/*++
+
+Name: netvsc_linkstatus_callback()
+
+Desc: Link up/down notification
+
+--*/
+static void netvsc_linkstatus_callback(DEVICE_OBJECT *device_obj, unsigned int status)
+{
+ struct device_context* device_ctx = to_device_context(device_obj);
+ struct net_device* net = (struct net_device *)device_ctx->device.driver_data;
+
+ DPRINT_ENTER(NETVSC_DRV);
+
+ if (!net)
+ {
+ DPRINT_ERR(NETVSC_DRV, "got link status but net device not initialized yet");
+ return;
+ }
+
+ if (status == 1)
+ {
+ netif_carrier_on(net);
+ netif_wake_queue(net);
+ }
+ else
+ {
+ netif_carrier_off(net);
+ netif_stop_queue(net);
+ }
+ DPRINT_EXIT(NETVSC_DRV);
+}
+
+
+/*++
+
+Name: netvsc_recv_callback()
+
+Desc: Callback when we receive a packet from the "wire" on the specify device
+
+--*/
+static int netvsc_recv_callback(DEVICE_OBJECT *device_obj, NETVSC_PACKET* packet)
+{
+ int ret=0;
+ struct device_context *device_ctx = to_device_context(device_obj);
+ struct net_device *net = (struct net_device *)device_ctx->device.driver_data;
+ struct net_device_context *net_device_ctx;
+
+ struct sk_buff *skb;
+ void *data;
+ int i=0;
+ unsigned long flags;
+
+ DPRINT_ENTER(NETVSC_DRV);
+
+ if (!net)
+ {
+ DPRINT_ERR(NETVSC_DRV, "got receive callback but net device not initialized yet");
+ return 0;
+ }
+
+ net_device_ctx = netdev_priv(net);
+
+ // Allocate a skb - TODO preallocate this
+ //skb = alloc_skb(packet->TotalDataBufferLength, GFP_ATOMIC);
+ skb = dev_alloc_skb(packet->TotalDataBufferLength + 2); // Pad 2-bytes to align IP header to 16 bytes
+ ASSERT(skb);
+ skb_reserve(skb, 2);
+ skb->dev = net;
+
+ // for kmap_atomic
+ local_irq_save(flags);
+
+ // Copy to skb. This copy is needed here since the memory pointed by NETVSC_PACKET
+ // cannot be deallocated
+ for (i=0; i<packet->PageBufferCount; i++)
+ {
+ data = kmap_atomic(pfn_to_page(packet->PageBuffers[i].Pfn), KM_IRQ1);
+ data = (void*)(unsigned long)data + packet->PageBuffers[i].Offset;
+
+ memcpy(skb_put(skb, packet->PageBuffers[i].Length), data, packet->PageBuffers[i].Length);
+
+ kunmap_atomic((void*)((unsigned long)data - packet->PageBuffers[i].Offset), KM_IRQ1);
+ }
+
+ local_irq_restore(flags);
+
+ skb->protocol = eth_type_trans(skb, net);
+
+ skb->ip_summed = CHECKSUM_NONE;
+
+ // Pass the skb back up. Network stack will deallocate the skb when it is done
+ ret = netif_rx(skb);
+
+ switch (ret)
+ {
+ case NET_RX_DROP:
+ net_device_ctx->stats.rx_dropped++;
+ break;
+ default:
+ net_device_ctx->stats.rx_packets++;
+ net_device_ctx->stats.rx_bytes += skb->len;
+ break;
+
+ }
+ DPRINT_DBG(NETVSC_DRV, "# of recvs %lu total size %lu", net_device_ctx->stats.rx_packets, net_device_ctx->stats.rx_bytes);
+
+ DPRINT_EXIT(NETVSC_DRV);
+
+ return 0;
+}
+
+static int netvsc_drv_exit_cb(struct device *dev, void *data)
+{
+ struct device **curr = (struct device **)data;
+ *curr = dev;
+ return 1; // stop iterating
+}
+
+/*++
+
+Name: netvsc_drv_exit()
+
+Desc:
+
+--*/
+void netvsc_drv_exit(void)
+{
+ NETVSC_DRIVER_OBJECT *netvsc_drv_obj=&g_netvsc_drv.drv_obj;
+ struct driver_context *drv_ctx=&g_netvsc_drv.drv_ctx;
+
+ struct device *current_dev=NULL;
+#if defined(KERNEL_2_6_5) || defined(KERNEL_2_6_9)
+#define driver_for_each_device(drv, start, data, fn) \
+ struct list_head *ptr, *n; \
+ list_for_each_safe(ptr, n, &((drv)->devices)) {\
+ struct device *curr_dev;\
+ curr_dev = list_entry(ptr, struct device, driver_list);\
+ fn(curr_dev, data);\
+ }
+#endif
+
+ DPRINT_ENTER(NETVSC_DRV);
+
+ while (1)
+ {
+ current_dev = NULL;
+
+ // Get the device
+ driver_for_each_device(&drv_ctx->driver, NULL, (void*)¤t_dev, netvsc_drv_exit_cb);
+
+ if (current_dev == NULL)
+ break;
+
+ // Initiate removal from the top-down
+ DPRINT_INFO(NETVSC_DRV, "unregistering device (%p)...", current_dev);
+
+ device_unregister(current_dev);
+ }
+
+ if (netvsc_drv_obj->Base.OnCleanup)
+ netvsc_drv_obj->Base.OnCleanup(&netvsc_drv_obj->Base);
+
+ vmbus_child_driver_unregister(drv_ctx);
+
+ DPRINT_EXIT(NETVSC_DRV);
+
+ return;
+}
+
+static int __init netvsc_init(void)
+{
+ int ret;
+
+ DPRINT_ENTER(NETVSC_DRV);
+ DPRINT_INFO(NETVSC_DRV, "Netvsc initializing....");
+
+ ret = netvsc_drv_init(NetVscInitialize);
+
+ DPRINT_EXIT(NETVSC_DRV);
+
+ return ret;
+}
+
+static void __exit netvsc_exit(void)
+{
+ DPRINT_ENTER(NETVSC_DRV);
+
+ netvsc_drv_exit();
+
+ DPRINT_EXIT(NETVSC_DRV);
+}
+
+module_param(netvsc_ringbuffer_size, int, S_IRUGO);
+
+module_init(netvsc_init);
+module_exit(netvsc_exit);
--- /dev/null
+++ b/drivers/staging/hv/NetVsc.h
@@ -0,0 +1,91 @@
+/*
+ *
+ * Copyright (c) 2009, Microsoft Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * Authors:
+ * Hank Janssen <hjanssen@xxxxxxxxxxxxx>
+ *
+ */
+
+
+#ifndef _NETVSC_H_
+#define _NETVSC_H_
+
+#include "VmbusPacketFormat.h"
+#include "nvspprotocol.h"
+
+#include "List.h"
+
+#include "NetVscApi.h"
+//
+// #defines
+//
+//#define NVSC_MIN_PROTOCOL_VERSION 1
+//#define NVSC_MAX_PROTOCOL_VERSION 1
+
+#define NETVSC_SEND_BUFFER_SIZE 64*1024 // 64K
+#define NETVSC_SEND_BUFFER_ID 0xface
+
+
+#define NETVSC_RECEIVE_BUFFER_SIZE 1024*1024 // 1MB
+
+#define NETVSC_RECEIVE_BUFFER_ID 0xcafe
+
+#define NETVSC_RECEIVE_SG_COUNT 1
+
+// Preallocated receive packets
+#define NETVSC_RECEIVE_PACKETLIST_COUNT 256
+
+//
+// Data types
+//
+
+// Per netvsc channel-specific
+typedef struct _NETVSC_DEVICE {
+ DEVICE_OBJECT *Device;
+
+ int RefCount;
+
+ int NumOutstandingSends;
+ // List of free preallocated NETVSC_PACKET to represent receive packet
+ LIST_ENTRY ReceivePacketList;
+ HANDLE ReceivePacketListLock;
+
+ // Send buffer allocated by us but manages by NetVSP
+ PVOID SendBuffer;
+ UINT32 SendBufferSize;
+ UINT32 SendBufferGpadlHandle;
+ UINT32 SendSectionSize;
+
+ // Receive buffer allocated by us but manages by NetVSP
+ PVOID ReceiveBuffer;
+ UINT32 ReceiveBufferSize;
+ UINT32 ReceiveBufferGpadlHandle;
+ UINT32 ReceiveSectionCount;
+ PNVSP_1_RECEIVE_BUFFER_SECTION ReceiveSections;
+
+ // Used for NetVSP initialization protocol
+ HANDLE ChannelInitEvent;
+ NVSP_MESSAGE ChannelInitPacket;
+
+ NVSP_MESSAGE RevokePacket;
+ //UCHAR HwMacAddr[HW_MACADDR_LEN];
+
+ // Holds rndis device info
+ void *Extension;
+} NETVSC_DEVICE;
+
+#endif // _NETVSC_H_
--- /dev/null
+++ b/drivers/staging/hv/RndisFilter.c
@@ -0,0 +1,1162 @@
+/*
+ *
+ * Copyright (c) 2009, Microsoft Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * Authors:
+ * Haiyang Zhang <haiyangz@xxxxxxxxxxxxx>
+ * Hank Janssen <hjanssen@xxxxxxxxxxxxx>
+ *
+ */
+
+
+#include "logging.h"
+
+#include "NetVscApi.h"
+#include "RndisFilter.h"
+
+//
+// Data types
+//
+
+typedef struct _RNDIS_FILTER_DRIVER_OBJECT {
+ // The original driver
+ NETVSC_DRIVER_OBJECT InnerDriver;
+
+} RNDIS_FILTER_DRIVER_OBJECT;
+
+typedef enum {
+ RNDIS_DEV_UNINITIALIZED = 0,
+ RNDIS_DEV_INITIALIZING,
+ RNDIS_DEV_INITIALIZED,
+ RNDIS_DEV_DATAINITIALIZED,
+} RNDIS_DEVICE_STATE;
+
+typedef struct _RNDIS_DEVICE {
+ NETVSC_DEVICE *NetDevice;
+
+ RNDIS_DEVICE_STATE State;
+ UINT32 LinkStatus;
+ UINT32 NewRequestId;
+
+ HANDLE RequestLock;
+ LIST_ENTRY RequestList;
+
+ UCHAR HwMacAddr[HW_MACADDR_LEN];
+} RNDIS_DEVICE;
+
+
+typedef struct _RNDIS_REQUEST {
+ LIST_ENTRY ListEntry;
+ HANDLE WaitEvent;
+
+ // FIXME: We assumed a fixed size response here. If we do ever need to handle a bigger response,
+ // we can either define a max response message or add a response buffer variable above this field
+ RNDIS_MESSAGE ResponseMessage;
+
+ // Simplify allocation by having a netvsc packet inline
+ NETVSC_PACKET Packet;
+ PAGE_BUFFER Buffer;
+ // FIXME: We assumed a fixed size request here.
+ RNDIS_MESSAGE RequestMessage;
+} RNDIS_REQUEST;
+
+
+typedef struct _RNDIS_FILTER_PACKET {
+ void *CompletionContext;
+ PFN_ON_SENDRECVCOMPLETION OnCompletion;
+
+ RNDIS_MESSAGE Message;
+} RNDIS_FILTER_PACKET;
+
+//
+// Internal routines
+//
+static int
+RndisFilterSendRequest(
+ RNDIS_DEVICE *Device,
+ RNDIS_REQUEST *Request
+ );
+
+static void
+RndisFilterReceiveResponse(
+ RNDIS_DEVICE *Device,
+ RNDIS_MESSAGE *Response
+ );
+
+static void
+RndisFilterReceiveIndicateStatus(
+ RNDIS_DEVICE *Device,
+ RNDIS_MESSAGE *Response
+ );
+
+static void
+RndisFilterReceiveData(
+ RNDIS_DEVICE *Device,
+ RNDIS_MESSAGE *Message,
+ NETVSC_PACKET *Packet
+ );
+
+static int
+RndisFilterOnReceive(
+ DEVICE_OBJECT *Device,
+ NETVSC_PACKET *Packet
+ );
+
+static int
+RndisFilterQueryDevice(
+ RNDIS_DEVICE *Device,
+ UINT32 Oid,
+ VOID *Result,
+ UINT32 *ResultSize
+ );
+
+static inline int
+RndisFilterQueryDeviceMac(
+ RNDIS_DEVICE *Device
+ );
+
+static inline int
+RndisFilterQueryDeviceLinkStatus(
+ RNDIS_DEVICE *Device
+ );
+
+static int
+RndisFilterSetPacketFilter(
+ RNDIS_DEVICE *Device,
+ UINT32 NewFilter
+ );
+
+static int
+RndisFilterInitDevice(
+ RNDIS_DEVICE *Device
+ );
+
+static int
+RndisFilterOpenDevice(
+ RNDIS_DEVICE *Device
+ );
+
+static int
+RndisFilterCloseDevice(
+ RNDIS_DEVICE *Device
+ );
+
+static int
+RndisFilterOnDeviceAdd(
+ DEVICE_OBJECT *Device,
+ void *AdditionalInfo
+ );
+
+static int
+RndisFilterOnDeviceRemove(
+ DEVICE_OBJECT *Device
+ );
+
+static void
+RndisFilterOnCleanup(
+ DRIVER_OBJECT *Driver
+ );
+
+static int
+RndisFilterOnOpen(
+ DEVICE_OBJECT *Device
+ );
+
+static int
+RndisFilterOnClose(
+ DEVICE_OBJECT *Device
+ );
+
+static int
+RndisFilterOnSend(
+ DEVICE_OBJECT *Device,
+ NETVSC_PACKET *Packet
+ );
+
+static void
+RndisFilterOnSendCompletion(
+ void *Context
+ );
+
+static void
+RndisFilterOnSendRequestCompletion(
+ void *Context
+ );
+
+//
+// Global var
+//
+
+// The one and only
+RNDIS_FILTER_DRIVER_OBJECT gRndisFilter;
+
+static inline RNDIS_DEVICE* GetRndisDevice(void)
+{
+ RNDIS_DEVICE *device;
+
+ device = MemAllocZeroed(sizeof(RNDIS_DEVICE));
+ if (!device)
+ {
+ return NULL;
+ }
+
+ device->RequestLock = SpinlockCreate();
+ if (!device->RequestLock)
+ {
+ MemFree(device);
+ return NULL;
+ }
+
+ INITIALIZE_LIST_HEAD(&device->RequestList);
+
+ device->State = RNDIS_DEV_UNINITIALIZED;
+
+ return device;
+}
+
+static inline void PutRndisDevice(RNDIS_DEVICE *Device)
+{
+ SpinlockClose(Device->RequestLock);
+ MemFree(Device);
+}
+
+static inline RNDIS_REQUEST* GetRndisRequest(RNDIS_DEVICE *Device, UINT32 MessageType, UINT32 MessageLength)
+{
+ RNDIS_REQUEST *request;
+ RNDIS_MESSAGE *rndisMessage;
+ RNDIS_SET_REQUEST *set;
+
+ request = MemAllocZeroed(sizeof(RNDIS_REQUEST));
+ if (!request)
+ {
+ return NULL;
+ }
+
+ request->WaitEvent = WaitEventCreate();
+ if (!request->WaitEvent)
+ {
+ MemFree(request);
+ return NULL;
+ }
+
+ rndisMessage = &request->RequestMessage;
+ rndisMessage->NdisMessageType = MessageType;
+ rndisMessage->MessageLength = MessageLength;
+
+ // Set the request id. This field is always after the rndis header for request/response packet types so
+ // we just used the SetRequest as a template
+ set = &rndisMessage->Message.SetRequest;
+ set->RequestId = InterlockedIncrement((int*)&Device->NewRequestId);
+
+ // Add to the request list
+ SpinlockAcquire(Device->RequestLock);
+ INSERT_TAIL_LIST(&Device->RequestList, &request->ListEntry);
+ SpinlockRelease(Device->RequestLock);
+
+ return request;
+}
+
+static inline void PutRndisRequest(RNDIS_DEVICE *Device, RNDIS_REQUEST *Request)
+{
+ SpinlockAcquire(Device->RequestLock);
+ REMOVE_ENTRY_LIST(&Request->ListEntry);
+ SpinlockRelease(Device->RequestLock);
+
+ WaitEventClose(Request->WaitEvent);
+ MemFree(Request);
+}
+
+static inline void DumpRndisMessage(RNDIS_MESSAGE *RndisMessage)
+{
+ switch (RndisMessage->NdisMessageType)
+ {
+ case REMOTE_NDIS_PACKET_MSG:
+ DPRINT_DBG(NETVSC, "REMOTE_NDIS_PACKET_MSG (len %u, data offset %u data len %u, # oob %u, oob offset %u, oob len %u, pkt offset %u, pkt len %u",
+ RndisMessage->MessageLength,
+ RndisMessage->Message.Packet.DataOffset,
+ RndisMessage->Message.Packet.DataLength,
+ RndisMessage->Message.Packet.NumOOBDataElements,
+ RndisMessage->Message.Packet.OOBDataOffset,
+ RndisMessage->Message.Packet.OOBDataLength,
+ RndisMessage->Message.Packet.PerPacketInfoOffset,
+ RndisMessage->Message.Packet.PerPacketInfoLength);
+ break;
+
+ case REMOTE_NDIS_INITIALIZE_CMPLT:
+ DPRINT_DBG(NETVSC, "REMOTE_NDIS_INITIALIZE_CMPLT (len %u, id 0x%x, status 0x%x, major %d, minor %d, device flags %d, max xfer size 0x%x, max pkts %u, pkt aligned %u)",
+ RndisMessage->MessageLength,
+ RndisMessage->Message.InitializeComplete.RequestId,
+ RndisMessage->Message.InitializeComplete.Status,
+ RndisMessage->Message.InitializeComplete.MajorVersion,
+ RndisMessage->Message.InitializeComplete.MinorVersion,
+ RndisMessage->Message.InitializeComplete.DeviceFlags,
+ RndisMessage->Message.InitializeComplete.MaxTransferSize,
+ RndisMessage->Message.InitializeComplete.MaxPacketsPerMessage,
+ RndisMessage->Message.InitializeComplete.PacketAlignmentFactor);
+ break;
+
+ case REMOTE_NDIS_QUERY_CMPLT:
+ DPRINT_DBG(NETVSC, "REMOTE_NDIS_QUERY_CMPLT (len %u, id 0x%x, status 0x%x, buf len %u, buf offset %u)",
+ RndisMessage->MessageLength,
+ RndisMessage->Message.QueryComplete.RequestId,
+ RndisMessage->Message.QueryComplete.Status,
+ RndisMessage->Message.QueryComplete.InformationBufferLength,
+ RndisMessage->Message.QueryComplete.InformationBufferOffset);
+ break;
+
+ case REMOTE_NDIS_SET_CMPLT:
+ DPRINT_DBG(NETVSC, "REMOTE_NDIS_SET_CMPLT (len %u, id 0x%x, status 0x%x)",
+ RndisMessage->MessageLength,
+ RndisMessage->Message.SetComplete.RequestId,
+ RndisMessage->Message.SetComplete.Status);
+ break;
+
+ case REMOTE_NDIS_INDICATE_STATUS_MSG:
+ DPRINT_DBG(NETVSC, "REMOTE_NDIS_INDICATE_STATUS_MSG (len %u, status 0x%x, buf len %u, buf offset %u)",
+ RndisMessage->MessageLength,
+ RndisMessage->Message.IndicateStatus.Status,
+ RndisMessage->Message.IndicateStatus.StatusBufferLength,
+ RndisMessage->Message.IndicateStatus.StatusBufferOffset);
+ break;
+
+ default:
+ DPRINT_DBG(NETVSC, "0x%x (len %u)",
+ RndisMessage->NdisMessageType,
+ RndisMessage->MessageLength);
+ break;
+ }
+}
+
+static int
+RndisFilterSendRequest(
+ RNDIS_DEVICE *Device,
+ RNDIS_REQUEST *Request
+ )
+{
+ int ret=0;
+ NETVSC_PACKET *packet;
+
+ DPRINT_ENTER(NETVSC);
+
+ // Setup the packet to send it
+ packet = &Request->Packet;
+
+ packet->IsDataPacket = FALSE;
+ packet->TotalDataBufferLength = Request->RequestMessage.MessageLength;
+ packet->PageBufferCount = 1;
+
+ packet->PageBuffers[0].Pfn = GetPhysicalAddress(&Request->RequestMessage) >> PAGE_SHIFT;
+ packet->PageBuffers[0].Length = Request->RequestMessage.MessageLength;
+ packet->PageBuffers[0].Offset = (ULONG_PTR)&Request->RequestMessage & (PAGE_SIZE -1);
+
+ packet->Completion.Send.SendCompletionContext = Request;//packet;
+ packet->Completion.Send.OnSendCompletion = RndisFilterOnSendRequestCompletion;
+ packet->Completion.Send.SendCompletionTid = (ULONG_PTR)Device;
+
+ ret = gRndisFilter.InnerDriver.OnSend(Device->NetDevice->Device, packet);
+ DPRINT_EXIT(NETVSC);
+ return ret;
+}
+
+
+static void
+RndisFilterReceiveResponse(
+ RNDIS_DEVICE *Device,
+ RNDIS_MESSAGE *Response
+ )
+{
+ LIST_ENTRY *anchor;
+ LIST_ENTRY *curr;
+ RNDIS_REQUEST *request=NULL;
+ BOOL found=FALSE;
+
+ DPRINT_ENTER(NETVSC);
+
+ SpinlockAcquire(Device->RequestLock);
+ ITERATE_LIST_ENTRIES(anchor, curr, &Device->RequestList)
+ {
+ request = CONTAINING_RECORD(curr, RNDIS_REQUEST, ListEntry);
+
+ // All request/response message contains RequestId as the 1st field
+ if (request->RequestMessage.Message.InitializeRequest.RequestId == Response->Message.InitializeComplete.RequestId)
+ {
+ DPRINT_DBG(NETVSC, "found rndis request for this response (id 0x%x req type 0x%x res type 0x%x)",
+ request->RequestMessage.Message.InitializeRequest.RequestId, request->RequestMessage.NdisMessageType, Response->NdisMessageType);
+
+ found = TRUE;
+ break;
+ }
+ }
+ SpinlockRelease(Device->RequestLock);
+
+ if (found)
+ {
+ if (Response->MessageLength <= sizeof(RNDIS_MESSAGE))
+ {
+ memcpy(&request->ResponseMessage, Response, Response->MessageLength);
+ }
+ else
+ {
+ DPRINT_ERR(NETVSC, "rndis response buffer overflow detected (size %u max %u)", Response->MessageLength, sizeof(RNDIS_FILTER_PACKET));
+
+ if (Response->NdisMessageType == REMOTE_NDIS_RESET_CMPLT) // does not have a request id field
+ {
+ request->ResponseMessage.Message.ResetComplete.Status = STATUS_BUFFER_OVERFLOW;
+ }
+ else
+ {
+ request->ResponseMessage.Message.InitializeComplete.Status = STATUS_BUFFER_OVERFLOW;
+ }
+ }
+
+ WaitEventSet(request->WaitEvent);
+ }
+ else
+ {
+ DPRINT_ERR(NETVSC, "no rndis request found for this response (id 0x%x res type 0x%x)",
+ Response->Message.InitializeComplete.RequestId, Response->NdisMessageType);
+ }
+
+ DPRINT_EXIT(NETVSC);
+}
+
+static void
+RndisFilterReceiveIndicateStatus(
+ RNDIS_DEVICE *Device,
+ RNDIS_MESSAGE *Response
+ )
+{
+ RNDIS_INDICATE_STATUS *indicate = &Response->Message.IndicateStatus;
+
+ if (indicate->Status == RNDIS_STATUS_MEDIA_CONNECT)
+ {
+ gRndisFilter.InnerDriver.OnLinkStatusChanged(Device->NetDevice->Device, 1);
+ }
+ else if (indicate->Status == RNDIS_STATUS_MEDIA_DISCONNECT)
+ {
+ gRndisFilter.InnerDriver.OnLinkStatusChanged(Device->NetDevice->Device, 0);
+ }
+ else
+ {
+ // TODO:
+ }
+}
+
+static void
+RndisFilterReceiveData(
+ RNDIS_DEVICE *Device,
+ RNDIS_MESSAGE *Message,
+ NETVSC_PACKET *Packet
+ )
+{
+ RNDIS_PACKET *rndisPacket;
+ UINT32 dataOffset;
+
+ DPRINT_ENTER(NETVSC);
+
+ // empty ethernet frame ??
+ ASSERT(Packet->PageBuffers[0].Length > RNDIS_MESSAGE_SIZE(RNDIS_PACKET));
+
+ rndisPacket = &Message->Message.Packet;
+
+ // FIXME: Handle multiple rndis pkt msgs that maybe enclosed in this
+ // netvsc packet (ie TotalDataBufferLength != MessageLength)
+
+ // Remove the rndis header and pass it back up the stack
+ dataOffset = RNDIS_HEADER_SIZE + rndisPacket->DataOffset;
+
+ Packet->TotalDataBufferLength -= dataOffset;
+ Packet->PageBuffers[0].Offset += dataOffset;
+ Packet->PageBuffers[0].Length -= dataOffset;
+
+ Packet->IsDataPacket = TRUE;
+
+ gRndisFilter.InnerDriver.OnReceiveCallback(Device->NetDevice->Device, Packet);
+
+ DPRINT_EXIT(NETVSC);
+}
+
+static int
+RndisFilterOnReceive(
+ DEVICE_OBJECT *Device,
+ NETVSC_PACKET *Packet
+ )
+{
+ NETVSC_DEVICE *netDevice = (NETVSC_DEVICE*)Device->Extension;
+ RNDIS_DEVICE *rndisDevice;
+ RNDIS_MESSAGE rndisMessage;
+ RNDIS_MESSAGE *rndisHeader;
+
+ DPRINT_ENTER(NETVSC);
+
+ ASSERT(netDevice);
+ //Make sure the rndis device state is initialized
+ if (!netDevice->Extension)
+ {
+ DPRINT_ERR(NETVSC, "got rndis message but no rndis device...dropping this message!");
+ DPRINT_EXIT(NETVSC);
+ return -1;
+ }
+
+ rndisDevice = (RNDIS_DEVICE*)netDevice->Extension;
+ if (rndisDevice->State == RNDIS_DEV_UNINITIALIZED)
+ {
+ DPRINT_ERR(NETVSC, "got rndis message but rndis device uninitialized...dropping this message!");
+ DPRINT_EXIT(NETVSC);
+ return -1;
+ }
+
+ rndisHeader = (RNDIS_MESSAGE*)PageMapVirtualAddress(Packet->PageBuffers[0].Pfn);
+
+ rndisHeader = (void*)((ULONG_PTR)rndisHeader + Packet->PageBuffers[0].Offset);
+
+ // Make sure we got a valid rndis message
+ // FIXME: There seems to be a bug in set completion msg where its MessageLength is 16 bytes but
+ // the ByteCount field in the xfer page range shows 52 bytes
+#if 0
+ if ( Packet->TotalDataBufferLength != rndisHeader->MessageLength )
+ {
+ PageUnmapVirtualAddress((void*)(ULONG_PTR)rndisHeader - Packet->PageBuffers[0].Offset);
+
+ DPRINT_ERR(NETVSC, "invalid rndis message? (expected %u bytes got %u)...dropping this message!",
+ rndisHeader->MessageLength, Packet->TotalDataBufferLength);
+ DPRINT_EXIT(NETVSC);
+ return -1;
+ }
+#endif
+
+ if ((rndisHeader->NdisMessageType != REMOTE_NDIS_PACKET_MSG) && (rndisHeader->MessageLength > sizeof(RNDIS_MESSAGE)))
+ {
+ DPRINT_ERR(NETVSC, "incoming rndis message buffer overflow detected (got %u, max %u)...marking it an error!",
+ rndisHeader->MessageLength, sizeof(RNDIS_MESSAGE));
+ }
+
+ memcpy(&rndisMessage, rndisHeader, (rndisHeader->MessageLength > sizeof(RNDIS_MESSAGE))?sizeof(RNDIS_MESSAGE):rndisHeader->MessageLength);
+
+ PageUnmapVirtualAddress((void*)(ULONG_PTR)rndisHeader - Packet->PageBuffers[0].Offset);
+
+ DumpRndisMessage(&rndisMessage);
+
+ switch (rndisMessage.NdisMessageType)
+ {
+ // data msg
+ case REMOTE_NDIS_PACKET_MSG:
+ RndisFilterReceiveData(rndisDevice, &rndisMessage, Packet);
+ break;
+
+ // completion msgs
+ case REMOTE_NDIS_INITIALIZE_CMPLT:
+ case REMOTE_NDIS_QUERY_CMPLT:
+ case REMOTE_NDIS_SET_CMPLT:
+ //case REMOTE_NDIS_RESET_CMPLT:
+ //case REMOTE_NDIS_KEEPALIVE_CMPLT:
+ RndisFilterReceiveResponse(rndisDevice, &rndisMessage);
+ break;
+
+ // notification msgs
+ case REMOTE_NDIS_INDICATE_STATUS_MSG:
+ RndisFilterReceiveIndicateStatus(rndisDevice, &rndisMessage);
+ break;
+ default:
+ DPRINT_ERR(NETVSC, "unhandled rndis message (type %u len %u)", rndisMessage.NdisMessageType, rndisMessage.MessageLength);
+ break;
+ }
+
+ DPRINT_EXIT(NETVSC);
+ return 0;
+}
+
+
+static int
+RndisFilterQueryDevice(
+ RNDIS_DEVICE *Device,
+ UINT32 Oid,
+ VOID *Result,
+ UINT32 *ResultSize
+ )
+{
+ RNDIS_REQUEST *request;
+ UINT32 inresultSize = *ResultSize;
+ RNDIS_QUERY_REQUEST *query;
+ RNDIS_QUERY_COMPLETE *queryComplete;
+ int ret=0;
+
+ DPRINT_ENTER(NETVSC);
+
+ ASSERT(Result);
+
+ *ResultSize = 0;
+ request = GetRndisRequest(Device, REMOTE_NDIS_QUERY_MSG, RNDIS_MESSAGE_SIZE(RNDIS_QUERY_REQUEST));
+ if (!request)
+ {
+ ret = -1;
+ goto Cleanup;
+ }
+
+ // Setup the rndis query
+ query = &request->RequestMessage.Message.QueryRequest;
+ query->Oid = Oid;
+ query->InformationBufferOffset = sizeof(RNDIS_QUERY_REQUEST);
+ query->InformationBufferLength = 0;
+ query->DeviceVcHandle = 0;
+
+ ret = RndisFilterSendRequest(Device, request);
+ if (ret != 0)
+ {
+ goto Cleanup;
+ }
+
+ WaitEventWait(request->WaitEvent);
+
+ // Copy the response back
+ queryComplete = &request->ResponseMessage.Message.QueryComplete;
+
+ if (queryComplete->InformationBufferLength > inresultSize)
+ {
+ ret = -1;
+ goto Cleanup;
+ }
+
+ memcpy(Result,
+ (void*)((ULONG_PTR)queryComplete + queryComplete->InformationBufferOffset),
+ queryComplete->InformationBufferLength);
+
+ *ResultSize = queryComplete->InformationBufferLength;
+
+Cleanup:
+ if (request)
+ {
+ PutRndisRequest(Device, request);
+ }
+ DPRINT_EXIT(NETVSC);
+
+ return ret;
+}
+
+static inline int
+RndisFilterQueryDeviceMac(
+ RNDIS_DEVICE *Device
+ )
+{
+ UINT32 size=HW_MACADDR_LEN;
+
+ return RndisFilterQueryDevice(Device,
+ RNDIS_OID_802_3_PERMANENT_ADDRESS,
+ Device->HwMacAddr,
+ &size);
+}
+
+static inline int
+RndisFilterQueryDeviceLinkStatus(
+ RNDIS_DEVICE *Device
+ )
+{
+ UINT32 size=sizeof(UINT32);
+
+ return RndisFilterQueryDevice(Device,
+ RNDIS_OID_GEN_MEDIA_CONNECT_STATUS,
+ &Device->LinkStatus,
+ &size);
+}
+
+static int
+RndisFilterSetPacketFilter(
+ RNDIS_DEVICE *Device,
+ UINT32 NewFilter
+ )
+{
+ RNDIS_REQUEST *request;
+ RNDIS_SET_REQUEST *set;
+ RNDIS_SET_COMPLETE *setComplete;
+ UINT32 status;
+ int ret;
+
+ DPRINT_ENTER(NETVSC);
+
+ ASSERT(RNDIS_MESSAGE_SIZE(RNDIS_SET_REQUEST) + sizeof(UINT32) <= sizeof(RNDIS_MESSAGE));
+
+ request = GetRndisRequest(Device, REMOTE_NDIS_SET_MSG, RNDIS_MESSAGE_SIZE(RNDIS_SET_REQUEST) + sizeof(UINT32));
+ if (!request)
+ {
+ ret = -1;
+ goto Cleanup;
+ }
+
+ // Setup the rndis set
+ set = &request->RequestMessage.Message.SetRequest;
+ set->Oid = RNDIS_OID_GEN_CURRENT_PACKET_FILTER;
+ set->InformationBufferLength = sizeof(UINT32);
+ set->InformationBufferOffset = sizeof(RNDIS_SET_REQUEST);
+
+ memcpy((void*)(ULONG_PTR)set + sizeof(RNDIS_SET_REQUEST), &NewFilter, sizeof(UINT32));
+
+ ret = RndisFilterSendRequest(Device, request);
+ if (ret != 0)
+ {
+ goto Cleanup;
+ }
+
+ ret = WaitEventWaitEx(request->WaitEvent, 2000/*2sec*/);
+ if (!ret)
+ {
+ ret = -1;
+ DPRINT_ERR(NETVSC, "timeout before we got a set response...");
+ // We cant deallocate the request since we may still receive a send completion for it.
+ goto Exit;
+ }
+ else
+ {
+ if (ret > 0)
+ {
+ ret = 0;
+ }
+ setComplete = &request->ResponseMessage.Message.SetComplete;
+ status = setComplete->Status;
+ }
+
+Cleanup:
+ if (request)
+ {
+ PutRndisRequest(Device, request);
+ }
+Exit:
+ DPRINT_EXIT(NETVSC);
+
+ return ret;
+}
+
+int
+RndisFilterInit(
+ NETVSC_DRIVER_OBJECT *Driver
+ )
+{
+ DPRINT_ENTER(NETVSC);
+
+ DPRINT_DBG(NETVSC, "sizeof(RNDIS_FILTER_PACKET) == %d", sizeof(RNDIS_FILTER_PACKET));
+
+ Driver->RequestExtSize = sizeof(RNDIS_FILTER_PACKET);
+ Driver->AdditionalRequestPageBufferCount = 1; // For rndis header
+
+ //Driver->Context = rndisDriver;
+
+ memset(&gRndisFilter, 0, sizeof(RNDIS_FILTER_DRIVER_OBJECT));
+
+ /*rndisDriver->Driver = Driver;
+
+ ASSERT(Driver->OnLinkStatusChanged);
+ rndisDriver->OnLinkStatusChanged = Driver->OnLinkStatusChanged;*/
+
+ // Save the original dispatch handlers before we override it
+ gRndisFilter.InnerDriver.Base.OnDeviceAdd = Driver->Base.OnDeviceAdd;
+ gRndisFilter.InnerDriver.Base.OnDeviceRemove = Driver->Base.OnDeviceRemove;
+ gRndisFilter.InnerDriver.Base.OnCleanup = Driver->Base.OnCleanup;
+
+ ASSERT(Driver->OnSend);
+ ASSERT(Driver->OnReceiveCallback);
+ gRndisFilter.InnerDriver.OnSend = Driver->OnSend;
+ gRndisFilter.InnerDriver.OnReceiveCallback = Driver->OnReceiveCallback;
+ gRndisFilter.InnerDriver.OnLinkStatusChanged = Driver->OnLinkStatusChanged;
+
+ // Override
+ Driver->Base.OnDeviceAdd = RndisFilterOnDeviceAdd;
+ Driver->Base.OnDeviceRemove = RndisFilterOnDeviceRemove;
+ Driver->Base.OnCleanup = RndisFilterOnCleanup;
+ Driver->OnSend = RndisFilterOnSend;
+ Driver->OnOpen = RndisFilterOnOpen;
+ Driver->OnClose = RndisFilterOnClose;
+ //Driver->QueryLinkStatus = RndisFilterQueryDeviceLinkStatus;
+ Driver->OnReceiveCallback = RndisFilterOnReceive;
+
+ DPRINT_EXIT(NETVSC);
+
+ return 0;
+}
+
+static int
+RndisFilterInitDevice(
+ RNDIS_DEVICE *Device
+ )
+{
+ RNDIS_REQUEST *request;
+ RNDIS_INITIALIZE_REQUEST *init;
+ RNDIS_INITIALIZE_COMPLETE *initComplete;
+ UINT32 status;
+ int ret;
+
+ DPRINT_ENTER(NETVSC);
+
+ request = GetRndisRequest(Device, REMOTE_NDIS_INITIALIZE_MSG, RNDIS_MESSAGE_SIZE(RNDIS_INITIALIZE_REQUEST));
+ if (!request)
+ {
+ ret = -1;
+ goto Cleanup;
+ }
+
+ // Setup the rndis set
+ init = &request->RequestMessage.Message.InitializeRequest;
+ init->MajorVersion = RNDIS_MAJOR_VERSION;
+ init->MinorVersion = RNDIS_MINOR_VERSION;
+ init->MaxTransferSize = 2048; // FIXME: Use 1536 - rounded ethernet frame size
+
+ Device->State = RNDIS_DEV_INITIALIZING;
+
+ ret = RndisFilterSendRequest(Device, request);
+ if (ret != 0)
+ {
+ Device->State = RNDIS_DEV_UNINITIALIZED;
+ goto Cleanup;
+ }
+
+ WaitEventWait(request->WaitEvent);
+
+ initComplete = &request->ResponseMessage.Message.InitializeComplete;
+ status = initComplete->Status;
+ if (status == RNDIS_STATUS_SUCCESS)
+ {
+ Device->State = RNDIS_DEV_INITIALIZED;
+ ret = 0;
+ }
+ else
+ {
+ Device->State = RNDIS_DEV_UNINITIALIZED;
+ ret = -1;
+ }
+
+Cleanup:
+ if (request)
+ {
+ PutRndisRequest(Device, request);
+ }
+ DPRINT_EXIT(NETVSC);
+
+ return ret;
+}
+
+static void
+RndisFilterHaltDevice(
+ RNDIS_DEVICE *Device
+ )
+{
+ RNDIS_REQUEST *request;
+ RNDIS_HALT_REQUEST *halt;
+
+ DPRINT_ENTER(NETVSC);
+
+ // Attempt to do a rndis device halt
+ request = GetRndisRequest(Device, REMOTE_NDIS_HALT_MSG, RNDIS_MESSAGE_SIZE(RNDIS_HALT_REQUEST));
+ if (!request)
+ {
+ goto Cleanup;
+ }
+
+ // Setup the rndis set
+ halt = &request->RequestMessage.Message.HaltRequest;
+ halt->RequestId = InterlockedIncrement((int*)&Device->NewRequestId);
+
+ // Ignore return since this msg is optional.
+ RndisFilterSendRequest(Device, request);
+
+ Device->State = RNDIS_DEV_UNINITIALIZED;
+
+Cleanup:
+ if (request)
+ {
+ PutRndisRequest(Device, request);
+ }
+ DPRINT_EXIT(NETVSC);
+ return;
+}
+
+
+static int
+RndisFilterOpenDevice(
+ RNDIS_DEVICE *Device
+ )
+{
+ int ret=0;
+
+ DPRINT_ENTER(NETVSC);
+
+ if (Device->State != RNDIS_DEV_INITIALIZED)
+ return 0;
+
+ ret = RndisFilterSetPacketFilter(Device, NDIS_PACKET_TYPE_BROADCAST|NDIS_PACKET_TYPE_DIRECTED);
+ if (ret == 0)
+ {
+ Device->State = RNDIS_DEV_DATAINITIALIZED;
+ }
+
+ DPRINT_EXIT(NETVSC);
+ return ret;
+}
+
+static int
+RndisFilterCloseDevice(
+ RNDIS_DEVICE *Device
+ )
+{
+ int ret;
+
+ DPRINT_ENTER(NETVSC);
+
+ if (Device->State != RNDIS_DEV_DATAINITIALIZED)
+ return 0;
+
+ ret = RndisFilterSetPacketFilter(Device, 0);
+ if (ret == 0)
+ {
+ Device->State = RNDIS_DEV_INITIALIZED;
+ }
+
+ DPRINT_EXIT(NETVSC);
+
+ return ret;
+}
+
+
+int
+RndisFilterOnDeviceAdd(
+ DEVICE_OBJECT *Device,
+ void *AdditionalInfo
+ )
+{
+ int ret;
+ NETVSC_DEVICE *netDevice;
+ RNDIS_DEVICE *rndisDevice;
+ NETVSC_DEVICE_INFO *deviceInfo = (NETVSC_DEVICE_INFO*)AdditionalInfo;
+
+ DPRINT_ENTER(NETVSC);
+
+ //rndisDevice = MemAlloc(sizeof(RNDIS_DEVICE));
+ rndisDevice = GetRndisDevice();
+ if (!rndisDevice)
+ {
+ DPRINT_EXIT(NETVSC);
+ return -1;
+ }
+
+ DPRINT_DBG(NETVSC, "rndis device object allocated - %p", rndisDevice);
+
+ // Let the inner driver handle this first to create the netvsc channel
+ // NOTE! Once the channel is created, we may get a receive callback
+ // (RndisFilterOnReceive()) before this call is completed
+ ret = gRndisFilter.InnerDriver.Base.OnDeviceAdd(Device, AdditionalInfo);
+ if (ret != 0)
+ {
+ PutRndisDevice(rndisDevice);
+ DPRINT_EXIT(NETVSC);
+ return ret;
+ }
+
+ //
+ // Initialize the rndis device
+ //
+ netDevice = (NETVSC_DEVICE*)Device->Extension;
+ ASSERT(netDevice);
+ ASSERT(netDevice->Device);
+
+ netDevice->Extension = rndisDevice;
+ rndisDevice->NetDevice = netDevice;
+
+ // Send the rndis initialization message
+ ret = RndisFilterInitDevice(rndisDevice);
+ if (ret != 0)
+ {
+ // TODO: If rndis init failed, we will need to shut down the channel
+ }
+
+ // Get the mac address
+ ret = RndisFilterQueryDeviceMac(rndisDevice);
+ if (ret != 0)
+ {
+ // TODO: shutdown rndis device and the channel
+ }
+
+ DPRINT_INFO(NETVSC, "Device 0x%p mac addr %02x%02x%02x%02x%02x%02x",
+ rndisDevice,
+ rndisDevice->HwMacAddr[0],
+ rndisDevice->HwMacAddr[1],
+ rndisDevice->HwMacAddr[2],
+ rndisDevice->HwMacAddr[3],
+ rndisDevice->HwMacAddr[4],
+ rndisDevice->HwMacAddr[5]);
+
+ memcpy(deviceInfo->MacAddr, rndisDevice->HwMacAddr, HW_MACADDR_LEN);
+
+ RndisFilterQueryDeviceLinkStatus(rndisDevice);
+
+ deviceInfo->LinkState = rndisDevice->LinkStatus;
+ DPRINT_INFO(NETVSC, "Device 0x%p link state %s", rndisDevice, ((deviceInfo->LinkState)?("down"):("up")));
+
+ DPRINT_EXIT(NETVSC);
+
+ return ret;
+}
+
+
+static int
+RndisFilterOnDeviceRemove(
+ DEVICE_OBJECT *Device
+ )
+{
+ NETVSC_DEVICE *netDevice = (NETVSC_DEVICE*)Device->Extension;
+ RNDIS_DEVICE *rndisDevice = (RNDIS_DEVICE*)netDevice->Extension;
+
+ DPRINT_ENTER(NETVSC);
+
+ // Halt and release the rndis device
+ RndisFilterHaltDevice(rndisDevice);
+
+ PutRndisDevice(rndisDevice);
+ netDevice->Extension = NULL;
+
+ // Pass control to inner driver to remove the device
+ gRndisFilter.InnerDriver.Base.OnDeviceRemove(Device);
+
+ DPRINT_EXIT(NETVSC);
+
+ return 0;
+}
+
+
+static void
+RndisFilterOnCleanup(
+ DRIVER_OBJECT *Driver
+ )
+{
+ DPRINT_ENTER(NETVSC);
+
+ DPRINT_EXIT(NETVSC);
+}
+
+static int
+RndisFilterOnOpen(
+ DEVICE_OBJECT *Device
+ )
+{
+ int ret;
+ NETVSC_DEVICE *netDevice = (NETVSC_DEVICE*)Device->Extension;
+
+ DPRINT_ENTER(NETVSC);
+
+ ASSERT(netDevice);
+ ret = RndisFilterOpenDevice((RNDIS_DEVICE*)netDevice->Extension);
+
+ DPRINT_EXIT(NETVSC);
+
+ return ret;
+}
+
+static int
+RndisFilterOnClose(
+ DEVICE_OBJECT *Device
+ )
+{
+ int ret;
+ NETVSC_DEVICE *netDevice = (NETVSC_DEVICE*)Device->Extension;
+
+ DPRINT_ENTER(NETVSC);
+
+ ASSERT(netDevice);
+ ret = RndisFilterCloseDevice((RNDIS_DEVICE*)netDevice->Extension);
+
+ DPRINT_EXIT(NETVSC);
+
+ return ret;
+}
+
+
+static int
+RndisFilterOnSend(
+ DEVICE_OBJECT *Device,
+ NETVSC_PACKET *Packet
+ )
+{
+ int ret=0;
+ RNDIS_FILTER_PACKET *filterPacket;
+ RNDIS_MESSAGE *rndisMessage;
+ RNDIS_PACKET *rndisPacket;
+ UINT32 rndisMessageSize;
+
+ DPRINT_ENTER(NETVSC);
+
+ // Add the rndis header
+ filterPacket = (RNDIS_FILTER_PACKET*)Packet->Extension;
+ ASSERT(filterPacket);
+
+ memset(filterPacket, 0, sizeof(RNDIS_FILTER_PACKET));
+
+ rndisMessage = &filterPacket->Message;
+ rndisMessageSize = RNDIS_MESSAGE_SIZE(RNDIS_PACKET);
+
+ rndisMessage->NdisMessageType = REMOTE_NDIS_PACKET_MSG;
+ rndisMessage->MessageLength = Packet->TotalDataBufferLength + rndisMessageSize;
+
+ rndisPacket = &rndisMessage->Message.Packet;
+ rndisPacket->DataOffset = sizeof(RNDIS_PACKET);
+ rndisPacket->DataLength = Packet->TotalDataBufferLength;
+
+ Packet->IsDataPacket = TRUE;
+ Packet->PageBuffers[0].Pfn = GetPhysicalAddress(rndisMessage) >> PAGE_SHIFT;
+ Packet->PageBuffers[0].Offset = (ULONG_PTR)rndisMessage & (PAGE_SIZE-1);
+ Packet->PageBuffers[0].Length = rndisMessageSize;
+
+ // Save the packet send completion and context
+ filterPacket->OnCompletion = Packet->Completion.Send.OnSendCompletion;
+ filterPacket->CompletionContext = Packet->Completion.Send.SendCompletionContext;
+
+ // Use ours
+ Packet->Completion.Send.OnSendCompletion = RndisFilterOnSendCompletion;
+ Packet->Completion.Send.SendCompletionContext = filterPacket;
+
+ ret = gRndisFilter.InnerDriver.OnSend(Device, Packet);
+ if (ret != 0)
+ {
+ // Reset the completion to originals to allow retries from above
+ Packet->Completion.Send.OnSendCompletion = filterPacket->OnCompletion;
+ Packet->Completion.Send.SendCompletionContext = filterPacket->CompletionContext;
+ }
+
+ DPRINT_EXIT(NETVSC);
+
+ return ret;
+}
+
+static void
+RndisFilterOnSendCompletion(
+ void *Context)
+{
+ RNDIS_FILTER_PACKET *filterPacket = (RNDIS_FILTER_PACKET *)Context;
+
+ DPRINT_ENTER(NETVSC);
+
+ // Pass it back to the original handler
+ filterPacket->OnCompletion(filterPacket->CompletionContext);
+
+ DPRINT_EXIT(NETVSC);
+}
+
+
+static void
+RndisFilterOnSendRequestCompletion(
+ void *Context
+ )
+{
+ DPRINT_ENTER(NETVSC);
+
+ // Noop
+ DPRINT_EXIT(NETVSC);
+}
--- /dev/null
+++ b/drivers/staging/hv/RndisFilter.h
@@ -0,0 +1,61 @@
+/*
+ *
+ * Copyright (c) 2009, Microsoft Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * Authors:
+ * Haiyang Zhang <haiyangz@xxxxxxxxxxxxx>
+ * Hank Janssen <hjanssen@xxxxxxxxxxxxx>
+ *
+ */
+
+
+#ifndef _RNDISFILTER_H_
+#define _RNDISFILTER_H_
+
+#define __struct_bcount(x)
+
+#include "osd.h"
+#include "NetVsc.h"
+
+#include "rndis.h"
+
+#define RNDIS_HEADER_SIZE (sizeof(RNDIS_MESSAGE) - sizeof(RNDIS_MESSAGE_CONTAINER))
+
+#define NDIS_PACKET_TYPE_DIRECTED 0x00000001
+#define NDIS_PACKET_TYPE_MULTICAST 0x00000002
+#define NDIS_PACKET_TYPE_ALL_MULTICAST 0x00000004
+#define NDIS_PACKET_TYPE_BROADCAST 0x00000008
+#define NDIS_PACKET_TYPE_SOURCE_ROUTING 0x00000010
+#define NDIS_PACKET_TYPE_PROMISCUOUS 0x00000020
+#define NDIS_PACKET_TYPE_SMT 0x00000040
+#define NDIS_PACKET_TYPE_ALL_LOCAL 0x00000080
+#define NDIS_PACKET_TYPE_GROUP 0x00000100
+#define NDIS_PACKET_TYPE_ALL_FUNCTIONAL 0x00000200
+#define NDIS_PACKET_TYPE_FUNCTIONAL 0x00000400
+#define NDIS_PACKET_TYPE_MAC_FRAME 0x00000800
+
+
+
+//
+// Interface
+//
+int
+RndisFilterInit(
+ NETVSC_DRIVER_OBJECT *Driver
+ );
+
+
+#endif // _RNDISFILTER_H_
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