Staging: hv: add the Hyper-V virtual bus

This is the virtual bus that all of the Linux Hyper-V drivers use.

Signed-off-by: Hank Janssen <hjanssen@microsoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 157 insertions, 0 deletions

diff --git a/drivers/staging/hv/Channel.h b/drivers/staging/hv/Channel.h
new file mode 100644
index 0000000..117b2e1
--- /dev/null
+++ b/drivers/staging/hv/Channel.h
@@ -0,0 +1,157 @@
+/*
+ *
+ * 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@microsoft.com>
+ *   Hank Janssen  <hjanssen@microsoft.com>
+ *
+ */
+
+
+#ifndef _CHANNEL_H_
+#define _CHANNEL_H_
+
+#include "osd.h"
+#include "ChannelMgmt.h"
+
+#pragma pack(push,1)
+
+
+// The format must be the same as VMDATA_GPA_DIRECT
+typedef struct _VMBUS_CHANNEL_PACKET_PAGE_BUFFER {
+    UINT16				Type;
+    UINT16				DataOffset8;
+    UINT16				Length8;
+    UINT16				Flags;
+    UINT64				TransactionId;
+	UINT32				Reserved;
+	UINT32				RangeCount;
+    PAGE_BUFFER			Range[MAX_PAGE_BUFFER_COUNT];
+} VMBUS_CHANNEL_PACKET_PAGE_BUFFER;
+
+
+// The format must be the same as VMDATA_GPA_DIRECT
+typedef struct _VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER {
+    UINT16				Type;
+    UINT16				DataOffset8;
+    UINT16				Length8;
+    UINT16				Flags;
+    UINT64				TransactionId;
+	UINT32				Reserved;
+	UINT32				RangeCount;		// Always 1 in this case
+	MULTIPAGE_BUFFER	Range;
+} VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER;
+
+#pragma pack(pop)
+
+//
+// Routines
+//
+
+INTERNAL int
+VmbusChannelOpen(
+	VMBUS_CHANNEL			*Channel,
+	UINT32					SendRingBufferSize,
+	UINT32					RecvRingBufferSize,
+	PVOID					UserData,
+	UINT32					UserDataLen,
+	PFN_CHANNEL_CALLBACK	pfnOnChannelCallback,
+	PVOID					Context
+	);
+
+INTERNAL void
+VmbusChannelClose(
+	VMBUS_CHANNEL		*Channel
+	);
+
+INTERNAL int
+VmbusChannelSendPacket(
+	VMBUS_CHANNEL		*Channel,
+	const PVOID			Buffer,
+	UINT32				BufferLen,
+	UINT64				RequestId,
+	VMBUS_PACKET_TYPE	Type,
+	UINT32				Flags
+);
+
+INTERNAL int
+VmbusChannelSendPacketPageBuffer(
+	VMBUS_CHANNEL		*Channel,
+	PAGE_BUFFER			PageBuffers[],
+	UINT32				PageCount,
+	PVOID				Buffer,
+	UINT32				BufferLen,
+	UINT64				RequestId
+	);
+
+INTERNAL int
+VmbusChannelSendPacketMultiPageBuffer(
+	VMBUS_CHANNEL		*Channel,
+	MULTIPAGE_BUFFER	*MultiPageBuffer,
+	PVOID				Buffer,
+	UINT32				BufferLen,
+	UINT64				RequestId
+);
+
+INTERNAL int
+VmbusChannelEstablishGpadl(
+	VMBUS_CHANNEL		*Channel,
+	PVOID				Kbuffer,	// from kmalloc()
+	UINT32				Size,		// page-size multiple
+	UINT32				*GpadlHandle
+	);
+
+INTERNAL int
+VmbusChannelTeardownGpadl(
+	VMBUS_CHANNEL	*Channel,
+	UINT32			GpadlHandle
+	);
+
+INTERNAL int
+VmbusChannelRecvPacket(
+	VMBUS_CHANNEL		*Channel,
+	PVOID				Buffer,
+	UINT32				BufferLen,
+	UINT32*				BufferActualLen,
+	UINT64*				RequestId
+	);
+
+INTERNAL int
+VmbusChannelRecvPacketRaw(
+	VMBUS_CHANNEL		*Channel,
+	PVOID				Buffer,
+	UINT32				BufferLen,
+	UINT32*				BufferActualLen,
+	UINT64*				RequestId
+	);
+
+INTERNAL void
+VmbusChannelOnChannelEvent(
+	VMBUS_CHANNEL		*Channel
+	);
+
+INTERNAL void
+VmbusChannelGetDebugInfo(
+	VMBUS_CHANNEL				*Channel,
+	VMBUS_CHANNEL_DEBUG_INFO	*DebugInfo
+	);
+
+INTERNAL void
+VmbusChannelOnTimer(
+	void		*Context
+	);
+#endif //_CHANNEL_H_