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>
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_