Staging: hv: rename Channel.c and .h to channel.c and .h

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

1 files changed, 0 insertions, 1094 deletions

diff --git a/drivers/staging/hv/Channel.c b/drivers/staging/hv/Channel.c
deleted file mode 100644
index eab7d16dd5ef..000000000000
--- a/drivers/staging/hv/Channel.c
+++ /dev/null
@@ -1,1094 +0,0 @@
-/*
- * 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>
- */
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/slab.h>
-#include <linux/module.h>
-#include "osd.h"
-#include "logging.h"
-#include "VmbusPrivate.h"
-
-/* Internal routines */
-static int VmbusChannelCreateGpadlHeader(
-	void *Kbuffer,	/* must be phys and virt contiguous */
-	u32 Size,	/* page-size multiple */
-	struct vmbus_channel_msginfo **msgInfo,
-	u32 *MessageCount);
-static void DumpVmbusChannel(struct vmbus_channel *channel);
-static void VmbusChannelSetEvent(struct vmbus_channel *channel);
-
-
-#if 0
-static void DumpMonitorPage(struct hv_monitor_page *MonitorPage)
-{
-	int i = 0;
-	int j = 0;
-
-	DPRINT_DBG(VMBUS, "monitorPage - %p, trigger state - %d",
-		   MonitorPage, MonitorPage->TriggerState);
-
-	for (i = 0; i < 4; i++)
-		DPRINT_DBG(VMBUS, "trigger group (%d) - %llx", i,
-			   MonitorPage->TriggerGroup[i].AsUINT64);
-
-	for (i = 0; i < 4; i++) {
-		for (j = 0; j < 32; j++) {
-			DPRINT_DBG(VMBUS, "latency (%d)(%d) - %llx", i, j,
-				   MonitorPage->Latency[i][j]);
-		}
-	}
-	for (i = 0; i < 4; i++) {
-		for (j = 0; j < 32; j++) {
-			DPRINT_DBG(VMBUS, "param-conn id (%d)(%d) - %d", i, j,
-			       MonitorPage->Parameter[i][j].ConnectionId.Asu32);
-			DPRINT_DBG(VMBUS, "param-flag (%d)(%d) - %d", i, j,
-				MonitorPage->Parameter[i][j].FlagNumber);
-		}
-	}
-}
-#endif
-
-/*
- * VmbusChannelSetEvent - Trigger an event notification on the specified
- * channel.
- */
-static void VmbusChannelSetEvent(struct vmbus_channel *Channel)
-{
-	struct hv_monitor_page *monitorPage;
-
-	DPRINT_ENTER(VMBUS);
-
-	if (Channel->OfferMsg.MonitorAllocated) {
-		/* Each u32 represents 32 channels */
-		set_bit(Channel->OfferMsg.ChildRelId & 31,
-			(unsigned long *) gVmbusConnection.SendInterruptPage +
-			(Channel->OfferMsg.ChildRelId >> 5));
-
-		monitorPage = gVmbusConnection.MonitorPages;
-		monitorPage++; /* Get the child to parent monitor page */
-
-		set_bit(Channel->MonitorBit,
-			(unsigned long *)&monitorPage->TriggerGroup
-					[Channel->MonitorGroup].Pending);
-
-	} else {
-		VmbusSetEvent(Channel->OfferMsg.ChildRelId);
-	}
-
-	DPRINT_EXIT(VMBUS);
-}
-
-#if 0
-static void VmbusChannelClearEvent(struct vmbus_channel *channel)
-{
-	struct hv_monitor_page *monitorPage;
-
-	DPRINT_ENTER(VMBUS);
-
-	if (Channel->OfferMsg.MonitorAllocated) {
-		/* Each u32 represents 32 channels */
-		clear_bit(Channel->OfferMsg.ChildRelId & 31,
-			  (unsigned long *)gVmbusConnection.SendInterruptPage +
-			  (Channel->OfferMsg.ChildRelId >> 5));
-
-		monitorPage =
-			(struct hv_monitor_page *)gVmbusConnection.MonitorPages;
-		monitorPage++; /* Get the child to parent monitor page */
-
-		clear_bit(Channel->MonitorBit,
-			  (unsigned long *)&monitorPage->TriggerGroup
-					[Channel->MonitorGroup].Pending);
-	}
-
-	DPRINT_EXIT(VMBUS);
-}
-
-#endif
-/*
- * VmbusChannelGetDebugInfo -Retrieve various channel debug info
- */
-void VmbusChannelGetDebugInfo(struct vmbus_channel *Channel,
-			      struct vmbus_channel_debug_info *DebugInfo)
-{
-	struct hv_monitor_page *monitorPage;
-	u8 monitorGroup = (u8)Channel->OfferMsg.MonitorId / 32;
-	u8 monitorOffset = (u8)Channel->OfferMsg.MonitorId % 32;
-	/* u32 monitorBit	= 1 << monitorOffset; */
-
-	DebugInfo->RelId = Channel->OfferMsg.ChildRelId;
-	DebugInfo->State = Channel->State;
-	memcpy(&DebugInfo->InterfaceType,
-	       &Channel->OfferMsg.Offer.InterfaceType, sizeof(struct hv_guid));
-	memcpy(&DebugInfo->InterfaceInstance,
-	       &Channel->OfferMsg.Offer.InterfaceInstance,
-	       sizeof(struct hv_guid));
-
-	monitorPage = (struct hv_monitor_page *)gVmbusConnection.MonitorPages;
-
-	DebugInfo->MonitorId = Channel->OfferMsg.MonitorId;
-
-	DebugInfo->ServerMonitorPending =
-			monitorPage->TriggerGroup[monitorGroup].Pending;
-	DebugInfo->ServerMonitorLatency =
-			monitorPage->Latency[monitorGroup][monitorOffset];
-	DebugInfo->ServerMonitorConnectionId =
-			monitorPage->Parameter[monitorGroup]
-					      [monitorOffset].ConnectionId.u.Id;
-
-	monitorPage++;
-
-	DebugInfo->ClientMonitorPending =
-			monitorPage->TriggerGroup[monitorGroup].Pending;
-	DebugInfo->ClientMonitorLatency =
-			monitorPage->Latency[monitorGroup][monitorOffset];
-	DebugInfo->ClientMonitorConnectionId =
-			monitorPage->Parameter[monitorGroup]
-					      [monitorOffset].ConnectionId.u.Id;
-
-	RingBufferGetDebugInfo(&Channel->Inbound, &DebugInfo->Inbound);
-	RingBufferGetDebugInfo(&Channel->Outbound, &DebugInfo->Outbound);
-}
-
-/*
- * VmbusChannelOpen - Open the specified channel.
- */
-int VmbusChannelOpen(struct vmbus_channel *NewChannel, u32 SendRingBufferSize,
-		     u32 RecvRingBufferSize, void *UserData, u32 UserDataLen,
-		     void (*OnChannelCallback)(void *context), void *Context)
-{
-	struct vmbus_channel_open_channel *openMsg;
-	struct vmbus_channel_msginfo *openInfo = NULL;
-	void *in, *out;
-	unsigned long flags;
-	int ret, err = 0;
-
-	DPRINT_ENTER(VMBUS);
-
-	/* Aligned to page size */
-	/* ASSERT(!(SendRingBufferSize & (PAGE_SIZE - 1))); */
-	/* ASSERT(!(RecvRingBufferSize & (PAGE_SIZE - 1))); */
-
-	NewChannel->OnChannelCallback = OnChannelCallback;
-	NewChannel->ChannelCallbackContext = Context;
-
-	/* Allocate the ring buffer */
-	out = osd_PageAlloc((SendRingBufferSize + RecvRingBufferSize)
-			     >> PAGE_SHIFT);
-	if (!out)
-		return -ENOMEM;
-
-	/* ASSERT(((unsigned long)out & (PAGE_SIZE-1)) == 0); */
-
-	in = (void *)((unsigned long)out + SendRingBufferSize);
-
-	NewChannel->RingBufferPages = out;
-	NewChannel->RingBufferPageCount = (SendRingBufferSize +
-					   RecvRingBufferSize) >> PAGE_SHIFT;
-
-	ret = RingBufferInit(&NewChannel->Outbound, out, SendRingBufferSize);
-	if (!ret) {
-		err = ret;
-		goto errorout;
-	}
-
-	ret = RingBufferInit(&NewChannel->Inbound, in, RecvRingBufferSize);
-	if (!ret) {
-		err = ret;
-		goto errorout;
-	}
-
-
-	/* Establish the gpadl for the ring buffer */
-	DPRINT_DBG(VMBUS, "Establishing ring buffer's gpadl for channel %p...",
-		   NewChannel);
-
-	NewChannel->RingBufferGpadlHandle = 0;
-
-	ret = VmbusChannelEstablishGpadl(NewChannel,
-					 NewChannel->Outbound.RingBuffer,
-					 SendRingBufferSize +
-					 RecvRingBufferSize,
-					 &NewChannel->RingBufferGpadlHandle);
-
-	if (!ret) {
-		err = ret;
-		goto errorout;
-	}
-
-	DPRINT_DBG(VMBUS, "channel %p <relid %d gpadl 0x%x send ring %p "
-		   "size %d recv ring %p size %d, downstreamoffset %d>",
-		   NewChannel, NewChannel->OfferMsg.ChildRelId,
-		   NewChannel->RingBufferGpadlHandle,
-		   NewChannel->Outbound.RingBuffer,
-		   NewChannel->Outbound.RingSize,
-		   NewChannel->Inbound.RingBuffer,
-		   NewChannel->Inbound.RingSize,
-		   SendRingBufferSize);
-
-	/* Create and init the channel open message */
-	openInfo = kmalloc(sizeof(*openInfo) +
-			   sizeof(struct vmbus_channel_open_channel),
-			   GFP_KERNEL);
-	if (!openInfo) {
-		err = -ENOMEM;
-		goto errorout;
-	}
-
-	openInfo->WaitEvent = osd_WaitEventCreate();
-	if (!openInfo->WaitEvent) {
-		err = -ENOMEM;
-		goto errorout;
-	}
-
-	openMsg = (struct vmbus_channel_open_channel *)openInfo->Msg;
-	openMsg->Header.MessageType = ChannelMessageOpenChannel;
-	openMsg->OpenId = NewChannel->OfferMsg.ChildRelId; /* FIXME */
-	openMsg->ChildRelId = NewChannel->OfferMsg.ChildRelId;
-	openMsg->RingBufferGpadlHandle = NewChannel->RingBufferGpadlHandle;
-	openMsg->DownstreamRingBufferPageOffset = SendRingBufferSize >>
-						  PAGE_SHIFT;
-	openMsg->ServerContextAreaGpadlHandle = 0; /* TODO */
-
-	if (UserDataLen > MAX_USER_DEFINED_BYTES) {
-		err = -EINVAL;
-		goto errorout;
-	}
-
-	if (UserDataLen)
-		memcpy(openMsg->UserData, UserData, UserDataLen);
-
-	spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags);
-	list_add_tail(&openInfo->MsgListEntry,
-		      &gVmbusConnection.ChannelMsgList);
-	spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags);
-
-	DPRINT_DBG(VMBUS, "Sending channel open msg...");
-
-	ret = VmbusPostMessage(openMsg,
-			       sizeof(struct vmbus_channel_open_channel));
-	if (ret != 0) {
-		DPRINT_ERR(VMBUS, "unable to open channel - %d", ret);
-		goto Cleanup;
-	}
-
-	/* FIXME: Need to time-out here */
-	osd_WaitEventWait(openInfo->WaitEvent);
-
-	if (openInfo->Response.OpenResult.Status == 0)
-		DPRINT_INFO(VMBUS, "channel <%p> open success!!", NewChannel);
-	else
-		DPRINT_INFO(VMBUS, "channel <%p> open failed - %d!!",
-			    NewChannel, openInfo->Response.OpenResult.Status);
-
-Cleanup:
-	spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags);
-	list_del(&openInfo->MsgListEntry);
-	spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags);
-
-	kfree(openInfo->WaitEvent);
-	kfree(openInfo);
-
-	DPRINT_EXIT(VMBUS);
-
-	return 0;
-
-errorout:
-	RingBufferCleanup(&NewChannel->Outbound);
-	RingBufferCleanup(&NewChannel->Inbound);
-	osd_PageFree(out, (SendRingBufferSize + RecvRingBufferSize)
-		     >> PAGE_SHIFT);
-	kfree(openInfo);
-	return err;
-}
-
-/*
- * DumpGpadlBody - Dump the gpadl body message to the console for
- * debugging purposes.
- */
-static void DumpGpadlBody(struct vmbus_channel_gpadl_body *Gpadl, u32 Len)
-{
-	int i;
-	int pfnCount;
-
-	pfnCount = (Len - sizeof(struct vmbus_channel_gpadl_body)) /
-		   sizeof(u64);
-	DPRINT_DBG(VMBUS, "gpadl body - len %d pfn count %d", Len, pfnCount);
-
-	for (i = 0; i < pfnCount; i++)
-		DPRINT_DBG(VMBUS, "gpadl body  - %d) pfn %llu",
-			   i, Gpadl->Pfn[i]);
-}
-
-/*
- * DumpGpadlHeader - Dump the gpadl header message to the console for
- * debugging purposes.
- */
-static void DumpGpadlHeader(struct vmbus_channel_gpadl_header *Gpadl)
-{
-	int i, j;
-	int pageCount;
-
-	DPRINT_DBG(VMBUS,
-		   "gpadl header - relid %d, range count %d, range buflen %d",
-		   Gpadl->ChildRelId, Gpadl->RangeCount, Gpadl->RangeBufLen);
-	for (i = 0; i < Gpadl->RangeCount; i++) {
-		pageCount = Gpadl->Range[i].ByteCount >> PAGE_SHIFT;
-		pageCount = (pageCount > 26) ? 26 : pageCount;
-
-		DPRINT_DBG(VMBUS, "gpadl range %d - len %d offset %d "
-			   "page count %d", i, Gpadl->Range[i].ByteCount,
-			   Gpadl->Range[i].ByteOffset, pageCount);
-
-		for (j = 0; j < pageCount; j++)
-			DPRINT_DBG(VMBUS, "%d) pfn %llu", j,
-				   Gpadl->Range[i].PfnArray[j]);
-	}
-}
-
-/*
- * VmbusChannelCreateGpadlHeader - Creates a gpadl for the specified buffer
- */
-static int VmbusChannelCreateGpadlHeader(void *Kbuffer, u32 Size,
-					 struct vmbus_channel_msginfo **MsgInfo,
-					 u32 *MessageCount)
-{
-	int i;
-	int pageCount;
-	unsigned long long pfn;
-	struct vmbus_channel_gpadl_header *gpaHeader;
-	struct vmbus_channel_gpadl_body *gpadlBody;
-	struct vmbus_channel_msginfo *msgHeader;
-	struct vmbus_channel_msginfo *msgBody = NULL;
-	u32 msgSize;
-
-	int pfnSum, pfnCount, pfnLeft, pfnCurr, pfnSize;
-
-	/* ASSERT((kbuffer & (PAGE_SIZE-1)) == 0); */
-	/* ASSERT((Size & (PAGE_SIZE-1)) == 0); */
-
-	pageCount = Size >> PAGE_SHIFT;
-	pfn = virt_to_phys(Kbuffer) >> PAGE_SHIFT;
-
-	/* do we need a gpadl body msg */
-	pfnSize = MAX_SIZE_CHANNEL_MESSAGE -
-		  sizeof(struct vmbus_channel_gpadl_header) -
-		  sizeof(struct gpa_range);
-	pfnCount = pfnSize / sizeof(u64);
-
-	if (pageCount > pfnCount) {
-		/* we need a gpadl body */
-		/* fill in the header */
-		msgSize = sizeof(struct vmbus_channel_msginfo) +
-			  sizeof(struct vmbus_channel_gpadl_header) +
-			  sizeof(struct gpa_range) + pfnCount * sizeof(u64);
-		msgHeader =  kzalloc(msgSize, GFP_KERNEL);
-		if (!msgHeader)
-			goto nomem;
-
-		INIT_LIST_HEAD(&msgHeader->SubMsgList);
-		msgHeader->MessageSize = msgSize;
-
-		gpaHeader = (struct vmbus_channel_gpadl_header *)msgHeader->Msg;
-		gpaHeader->RangeCount = 1;
-		gpaHeader->RangeBufLen = sizeof(struct gpa_range) +
-					 pageCount * sizeof(u64);
-		gpaHeader->Range[0].ByteOffset = 0;
-		gpaHeader->Range[0].ByteCount = Size;
-		for (i = 0; i < pfnCount; i++)
-			gpaHeader->Range[0].PfnArray[i] = pfn+i;
-		*MsgInfo = msgHeader;
-		*MessageCount = 1;
-
-		pfnSum = pfnCount;
-		pfnLeft = pageCount - pfnCount;
-
-		/* how many pfns can we fit */
-		pfnSize = MAX_SIZE_CHANNEL_MESSAGE -
-			  sizeof(struct vmbus_channel_gpadl_body);
-		pfnCount = pfnSize / sizeof(u64);
-
-		/* fill in the body */
-		while (pfnLeft) {
-			if (pfnLeft > pfnCount)
-				pfnCurr = pfnCount;
-			else
-				pfnCurr = pfnLeft;
-
-			msgSize = sizeof(struct vmbus_channel_msginfo) +
-				  sizeof(struct vmbus_channel_gpadl_body) +
-				  pfnCurr * sizeof(u64);
-			msgBody = kzalloc(msgSize, GFP_KERNEL);
-			/* FIXME: we probably need to more if this fails */
-			if (!msgBody)
-				goto nomem;
-			msgBody->MessageSize = msgSize;
-			(*MessageCount)++;
-			gpadlBody =
-				(struct vmbus_channel_gpadl_body *)msgBody->Msg;
-
-			/*
-			 * FIXME:
-			 * Gpadl is u32 and we are using a pointer which could
-			 * be 64-bit
-			 */
-			/* gpadlBody->Gpadl = kbuffer; */
-			for (i = 0; i < pfnCurr; i++)
-				gpadlBody->Pfn[i] = pfn + pfnSum + i;
-
-			/* add to msg header */
-			list_add_tail(&msgBody->MsgListEntry,
-				      &msgHeader->SubMsgList);
-			pfnSum += pfnCurr;
-			pfnLeft -= pfnCurr;
-		}
-	} else {
-		/* everything fits in a header */
-		msgSize = sizeof(struct vmbus_channel_msginfo) +
-			  sizeof(struct vmbus_channel_gpadl_header) +
-			  sizeof(struct gpa_range) + pageCount * sizeof(u64);
-		msgHeader = kzalloc(msgSize, GFP_KERNEL);
-		msgHeader->MessageSize = msgSize;
-
-		gpaHeader = (struct vmbus_channel_gpadl_header *)msgHeader->Msg;
-		gpaHeader->RangeCount = 1;
-		gpaHeader->RangeBufLen = sizeof(struct gpa_range) +
-					 pageCount * sizeof(u64);
-		gpaHeader->Range[0].ByteOffset = 0;
-		gpaHeader->Range[0].ByteCount = Size;
-		for (i = 0; i < pageCount; i++)
-			gpaHeader->Range[0].PfnArray[i] = pfn+i;
-
-		*MsgInfo = msgHeader;
-		*MessageCount = 1;
-	}
-
-	return 0;
-nomem:
-	kfree(msgHeader);
-	kfree(msgBody);
-	return -ENOMEM;
-}
-
-/*
- * VmbusChannelEstablishGpadl - Estabish a GPADL for the specified buffer
- *
- * @Channel: a channel
- * @Kbuffer: from kmalloc
- * @Size: page-size multiple
- * @GpadlHandle: some funky thing
- */
-int VmbusChannelEstablishGpadl(struct vmbus_channel *Channel, void *Kbuffer,
-			       u32 Size, u32 *GpadlHandle)
-{
-	struct vmbus_channel_gpadl_header *gpadlMsg;
-	struct vmbus_channel_gpadl_body *gpadlBody;
-	/* struct vmbus_channel_gpadl_created *gpadlCreated; */
-	struct vmbus_channel_msginfo *msgInfo = NULL;
-	struct vmbus_channel_msginfo *subMsgInfo;
-	u32 msgCount;
-	struct list_head *curr;
-	u32 nextGpadlHandle;
-	unsigned long flags;
-	int ret = 0;
-
-	DPRINT_ENTER(VMBUS);
-
-	nextGpadlHandle = atomic_read(&gVmbusConnection.NextGpadlHandle);
-	atomic_inc(&gVmbusConnection.NextGpadlHandle);
-
-	ret = VmbusChannelCreateGpadlHeader(Kbuffer, Size, &msgInfo, &msgCount);
-	if (ret)
-		return ret;
-
-	msgInfo->WaitEvent = osd_WaitEventCreate();
-	if (!msgInfo->WaitEvent) {
-		ret = -ENOMEM;
-		goto Cleanup;
-	}
-
-	gpadlMsg = (struct vmbus_channel_gpadl_header *)msgInfo->Msg;
-	gpadlMsg->Header.MessageType = ChannelMessageGpadlHeader;
-	gpadlMsg->ChildRelId = Channel->OfferMsg.ChildRelId;
-	gpadlMsg->Gpadl = nextGpadlHandle;
-
-	DumpGpadlHeader(gpadlMsg);
-
-	spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags);
-	list_add_tail(&msgInfo->MsgListEntry,
-		      &gVmbusConnection.ChannelMsgList);
-
-	spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags);
-	DPRINT_DBG(VMBUS, "buffer %p, size %d msg cnt %d",
-		   Kbuffer, Size, msgCount);
-
-	DPRINT_DBG(VMBUS, "Sending GPADL Header - len %zd",
-		   msgInfo->MessageSize - sizeof(*msgInfo));
-
-	ret = VmbusPostMessage(gpadlMsg, msgInfo->MessageSize -
-			       sizeof(*msgInfo));
-	if (ret != 0) {
-		DPRINT_ERR(VMBUS, "Unable to open channel - %d", ret);
-		goto Cleanup;
-	}
-
-	if (msgCount > 1) {
-		list_for_each(curr, &msgInfo->SubMsgList) {
-
-			/* FIXME: should this use list_entry() instead ? */
-			subMsgInfo = (struct vmbus_channel_msginfo *)curr;
-			gpadlBody =
-			     (struct vmbus_channel_gpadl_body *)subMsgInfo->Msg;
-
-			gpadlBody->Header.MessageType = ChannelMessageGpadlBody;
-			gpadlBody->Gpadl = nextGpadlHandle;
-
-			DPRINT_DBG(VMBUS, "Sending GPADL Body - len %zd",
-				   subMsgInfo->MessageSize -
-				   sizeof(*subMsgInfo));
-
-			DumpGpadlBody(gpadlBody, subMsgInfo->MessageSize -
-				      sizeof(*subMsgInfo));
-			ret = VmbusPostMessage(gpadlBody,
-					       subMsgInfo->MessageSize -
-					       sizeof(*subMsgInfo));
-			if (!ret)
-				goto Cleanup;
-
-		}
-	}
-	osd_WaitEventWait(msgInfo->WaitEvent);
-
-	/* At this point, we received the gpadl created msg */
-	DPRINT_DBG(VMBUS, "Received GPADL created "
-		   "(relid %d, status %d handle %x)",
-		   Channel->OfferMsg.ChildRelId,
-		   msgInfo->Response.GpadlCreated.CreationStatus,
-		   gpadlMsg->Gpadl);
-
-	*GpadlHandle = gpadlMsg->Gpadl;
-
-Cleanup:
-	spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags);
-	list_del(&msgInfo->MsgListEntry);
-	spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags);
-
-	kfree(msgInfo->WaitEvent);
-	kfree(msgInfo);
-
-	DPRINT_EXIT(VMBUS);
-
-	return ret;
-}
-
-/*
- * VmbusChannelTeardownGpadl -Teardown the specified GPADL handle
- */
-int VmbusChannelTeardownGpadl(struct vmbus_channel *Channel, u32 GpadlHandle)
-{
-	struct vmbus_channel_gpadl_teardown *msg;
-	struct vmbus_channel_msginfo *info;
-	unsigned long flags;
-	int ret;
-
-	DPRINT_ENTER(VMBUS);
-
-	/* ASSERT(GpadlHandle != 0); */
-
-	info = kmalloc(sizeof(*info) +
-		       sizeof(struct vmbus_channel_gpadl_teardown), GFP_KERNEL);
-	if (!info)
-		return -ENOMEM;
-
-	info->WaitEvent = osd_WaitEventCreate();
-	if (!info->WaitEvent) {
-		kfree(info);
-		return -ENOMEM;
-	}
-
-	msg = (struct vmbus_channel_gpadl_teardown *)info->Msg;
-
-	msg->Header.MessageType = ChannelMessageGpadlTeardown;
-	msg->ChildRelId = Channel->OfferMsg.ChildRelId;
-	msg->Gpadl = GpadlHandle;
-
-	spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags);
-	list_add_tail(&info->MsgListEntry,
-		      &gVmbusConnection.ChannelMsgList);
-	spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags);
-
-	ret = VmbusPostMessage(msg,
-			       sizeof(struct vmbus_channel_gpadl_teardown));
-	if (ret != 0) {
-		/* TODO: */
-		/* something... */
-	}
-
-	osd_WaitEventWait(info->WaitEvent);
-
-	/* Received a torndown response */
-	spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags);
-	list_del(&info->MsgListEntry);
-	spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags);
-
-	kfree(info->WaitEvent);
-	kfree(info);
-
-	DPRINT_EXIT(VMBUS);
-
-	return ret;
-}
-
-/*
- * VmbusChannelClose - Close the specified channel
- */
-void VmbusChannelClose(struct vmbus_channel *Channel)
-{
-	struct vmbus_channel_close_channel *msg;
-	struct vmbus_channel_msginfo *info;
-	unsigned long flags;
-	int ret;
-
-	DPRINT_ENTER(VMBUS);
-
-	/* Stop callback and cancel the timer asap */
-	Channel->OnChannelCallback = NULL;
-	del_timer_sync(&Channel->poll_timer);
-
-	/* Send a closing message */
-	info = kmalloc(sizeof(*info) +
-		       sizeof(struct vmbus_channel_close_channel), GFP_KERNEL);
-        /* FIXME: can't do anything other than return here because the
-	 *        function is void */
-	if (!info)
-		return;
-
-	/* info->waitEvent = osd_WaitEventCreate(); */
-
-	msg = (struct vmbus_channel_close_channel *)info->Msg;
-	msg->Header.MessageType = ChannelMessageCloseChannel;
-	msg->ChildRelId = Channel->OfferMsg.ChildRelId;
-
-	ret = VmbusPostMessage(msg, sizeof(struct vmbus_channel_close_channel));
-	if (ret != 0) {
-		/* TODO: */
-		/* something... */
-	}
-
-	/* Tear down the gpadl for the channel's ring buffer */
-	if (Channel->RingBufferGpadlHandle)
-		VmbusChannelTeardownGpadl(Channel,
-					  Channel->RingBufferGpadlHandle);
-
-	/* TODO: Send a msg to release the childRelId */
-
-	/* Cleanup the ring buffers for this channel */
-	RingBufferCleanup(&Channel->Outbound);
-	RingBufferCleanup(&Channel->Inbound);
-
-	osd_PageFree(Channel->RingBufferPages, Channel->RingBufferPageCount);
-
-	kfree(info);
-
-	/*
-	 * If we are closing the channel during an error path in
-	 * opening the channel, don't free the channel since the
-	 * caller will free the channel
-	 */
-
-	if (Channel->State == CHANNEL_OPEN_STATE) {
-		spin_lock_irqsave(&gVmbusConnection.channel_lock, flags);
-		list_del(&Channel->ListEntry);
-		spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags);
-
-		FreeVmbusChannel(Channel);
-	}
-
-	DPRINT_EXIT(VMBUS);
-}
-
-/**
- * VmbusChannelSendPacket() - Send the specified buffer on the given channel
- * @Channel: Pointer to vmbus_channel structure.
- * @Buffer: Pointer to the buffer you want to receive the data into.
- * @BufferLen: Maximum size of what the the buffer will hold
- * @RequestId: Identifier of the request
- * @vmbus_packet_type: Type of packet that is being send e.g. negotiate, time
- * packet etc.
- *
- * Sends data in @Buffer directly to hyper-v via the vmbus
- * This will send the data unparsed to hyper-v.
- *
- * Mainly used by Hyper-V drivers.
- */
-int VmbusChannelSendPacket(struct vmbus_channel *Channel, const void *Buffer,
-			   u32 BufferLen, u64 RequestId,
-			   enum vmbus_packet_type Type, u32 Flags)
-{
-	struct vmpacket_descriptor desc;
-	u32 packetLen = sizeof(struct vmpacket_descriptor) + BufferLen;
-	u32 packetLenAligned = ALIGN_UP(packetLen, sizeof(u64));
-	struct scatterlist bufferList[3];
-	u64 alignedData = 0;
-	int ret;
-
-	DPRINT_ENTER(VMBUS);
-	DPRINT_DBG(VMBUS, "channel %p buffer %p len %d",
-		   Channel, Buffer, BufferLen);
-
-	DumpVmbusChannel(Channel);
-
-	/* ASSERT((packetLenAligned - packetLen) < sizeof(u64)); */
-
-	/* Setup the descriptor */
-	desc.Type = Type; /* VmbusPacketTypeDataInBand; */
-	desc.Flags = Flags; /* VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; */
-	/* in 8-bytes granularity */
-	desc.DataOffset8 = sizeof(struct vmpacket_descriptor) >> 3;
-	desc.Length8 = (u16)(packetLenAligned >> 3);
-	desc.TransactionId = RequestId;
-
-	sg_init_table(bufferList, 3);
-	sg_set_buf(&bufferList[0], &desc, sizeof(struct vmpacket_descriptor));
-	sg_set_buf(&bufferList[1], Buffer, BufferLen);
-	sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen);
-
-	ret = RingBufferWrite(&Channel->Outbound, bufferList, 3);
-
-	/* TODO: We should determine if this is optional */
-	if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound))
-		VmbusChannelSetEvent(Channel);
-
-	DPRINT_EXIT(VMBUS);
-
-	return ret;
-}
-EXPORT_SYMBOL(VmbusChannelSendPacket);
-
-/*
- * VmbusChannelSendPacketPageBuffer - Send a range of single-page buffer
- * packets using a GPADL Direct packet type.
- */
-int VmbusChannelSendPacketPageBuffer(struct vmbus_channel *Channel,
-				     struct hv_page_buffer PageBuffers[],
-				     u32 PageCount, void *Buffer, u32 BufferLen,
-				     u64 RequestId)
-{
-	int ret;
-	int i;
-	struct VMBUS_CHANNEL_PACKET_PAGE_BUFFER desc;
-	u32 descSize;
-	u32 packetLen;
-	u32 packetLenAligned;
-	struct scatterlist bufferList[3];
-	u64 alignedData = 0;
-
-	DPRINT_ENTER(VMBUS);
-
-	if (PageCount > MAX_PAGE_BUFFER_COUNT)
-		return -EINVAL;
-
-	DumpVmbusChannel(Channel);
-
-	/*
-	 * Adjust the size down since VMBUS_CHANNEL_PACKET_PAGE_BUFFER is the
-	 * largest size we support
-	 */
-	descSize = sizeof(struct VMBUS_CHANNEL_PACKET_PAGE_BUFFER) -
-			  ((MAX_PAGE_BUFFER_COUNT - PageCount) *
-			  sizeof(struct hv_page_buffer));
-	packetLen = descSize + BufferLen;
-	packetLenAligned = ALIGN_UP(packetLen, sizeof(u64));
-
-	/* ASSERT((packetLenAligned - packetLen) < sizeof(u64)); */
-
-	/* Setup the descriptor */
-	desc.Type = VmbusPacketTypeDataUsingGpaDirect;
-	desc.Flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED;
-	desc.DataOffset8 = descSize >> 3; /* in 8-bytes grandularity */
-	desc.Length8 = (u16)(packetLenAligned >> 3);
-	desc.TransactionId = RequestId;
-	desc.RangeCount = PageCount;
-
-	for (i = 0; i < PageCount; i++) {
-		desc.Range[i].Length = PageBuffers[i].Length;
-		desc.Range[i].Offset = PageBuffers[i].Offset;
-		desc.Range[i].Pfn	 = PageBuffers[i].Pfn;
-	}
-
-	sg_init_table(bufferList, 3);
-	sg_set_buf(&bufferList[0], &desc, descSize);
-	sg_set_buf(&bufferList[1], Buffer, BufferLen);
-	sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen);
-
-	ret = RingBufferWrite(&Channel->Outbound, bufferList, 3);
-
-	/* TODO: We should determine if this is optional */
-	if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound))
-		VmbusChannelSetEvent(Channel);
-
-	DPRINT_EXIT(VMBUS);
-
-	return ret;
-}
-
-/*
- * VmbusChannelSendPacketMultiPageBuffer - Send a multi-page buffer packet
- * using a GPADL Direct packet type.
- */
-int VmbusChannelSendPacketMultiPageBuffer(struct vmbus_channel *Channel,
-				struct hv_multipage_buffer *MultiPageBuffer,
-				void *Buffer, u32 BufferLen, u64 RequestId)
-{
-	int ret;
-	struct VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER desc;
-	u32 descSize;
-	u32 packetLen;
-	u32 packetLenAligned;
-	struct scatterlist bufferList[3];
-	u64 alignedData = 0;
-	u32 PfnCount = NUM_PAGES_SPANNED(MultiPageBuffer->Offset,
-					 MultiPageBuffer->Length);
-
-	DPRINT_ENTER(VMBUS);
-
-	DumpVmbusChannel(Channel);
-
-	DPRINT_DBG(VMBUS, "data buffer - offset %u len %u pfn count %u",
-		   MultiPageBuffer->Offset, MultiPageBuffer->Length, PfnCount);
-
-	if ((PfnCount < 0) || (PfnCount > MAX_MULTIPAGE_BUFFER_COUNT))
-		return -EINVAL;
-
-	/*
-	 * Adjust the size down since VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER is
-	 * the largest size we support
-	 */
-	descSize = sizeof(struct VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER) -
-			  ((MAX_MULTIPAGE_BUFFER_COUNT - PfnCount) *
-			  sizeof(u64));
-	packetLen = descSize + BufferLen;
-	packetLenAligned = ALIGN_UP(packetLen, sizeof(u64));
-
-	/* ASSERT((packetLenAligned - packetLen) < sizeof(u64)); */
-
-	/* Setup the descriptor */
-	desc.Type = VmbusPacketTypeDataUsingGpaDirect;
-	desc.Flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED;
-	desc.DataOffset8 = descSize >> 3; /* in 8-bytes grandularity */
-	desc.Length8 = (u16)(packetLenAligned >> 3);
-	desc.TransactionId = RequestId;
-	desc.RangeCount = 1;
-
-	desc.Range.Length = MultiPageBuffer->Length;
-	desc.Range.Offset = MultiPageBuffer->Offset;
-
-	memcpy(desc.Range.PfnArray, MultiPageBuffer->PfnArray,
-	       PfnCount * sizeof(u64));
-
-	sg_init_table(bufferList, 3);
-	sg_set_buf(&bufferList[0], &desc, descSize);
-	sg_set_buf(&bufferList[1], Buffer, BufferLen);
-	sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen);
-
-	ret = RingBufferWrite(&Channel->Outbound, bufferList, 3);
-
-	/* TODO: We should determine if this is optional */
-	if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound))
-		VmbusChannelSetEvent(Channel);
-
-	DPRINT_EXIT(VMBUS);
-
-	return ret;
-}
-
-
-/**
- * VmbusChannelRecvPacket() - Retrieve the user packet on the specified channel
- * @Channel: Pointer to vmbus_channel structure.
- * @Buffer: Pointer to the buffer you want to receive the data into.
- * @BufferLen: Maximum size of what the the buffer will hold
- * @BufferActualLen: The actual size of the data after it was received
- * @RequestId: Identifier of the request
- *
- * Receives directly from the hyper-v vmbus and puts the data it received
- * into Buffer. This will receive the data unparsed from hyper-v.
- *
- * Mainly used by Hyper-V drivers.
- */
-int VmbusChannelRecvPacket(struct vmbus_channel *Channel, void *Buffer,
-			   u32 BufferLen, u32 *BufferActualLen, u64 *RequestId)
-{
-	struct vmpacket_descriptor desc;
-	u32 packetLen;
-	u32 userLen;
-	int ret;
-	unsigned long flags;
-
-	DPRINT_ENTER(VMBUS);
-
-	*BufferActualLen = 0;
-	*RequestId = 0;
-
-	spin_lock_irqsave(&Channel->inbound_lock, flags);
-
-	ret = RingBufferPeek(&Channel->Inbound, &desc,
-			     sizeof(struct vmpacket_descriptor));
-	if (ret != 0) {
-		spin_unlock_irqrestore(&Channel->inbound_lock, flags);
-
-		/* DPRINT_DBG(VMBUS, "nothing to read!!"); */
-		DPRINT_EXIT(VMBUS);
-		return 0;
-	}
-
-	/* VmbusChannelClearEvent(Channel); */
-
-	packetLen = desc.Length8 << 3;
-	userLen = packetLen - (desc.DataOffset8 << 3);
-	/* ASSERT(userLen > 0); */
-
-	DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d "
-		   "flag %d tid %llx pktlen %d datalen %d> ",
-		   Channel, Channel->OfferMsg.ChildRelId, desc.Type,
-		   desc.Flags, desc.TransactionId, packetLen, userLen);
-
-	*BufferActualLen = userLen;
-
-	if (userLen > BufferLen) {
-		spin_unlock_irqrestore(&Channel->inbound_lock, flags);
-
-		DPRINT_ERR(VMBUS, "buffer too small - got %d needs %d",
-			   BufferLen, userLen);
-		DPRINT_EXIT(VMBUS);
-
-		return -1;
-	}
-
-	*RequestId = desc.TransactionId;
-
-	/* Copy over the packet to the user buffer */
-	ret = RingBufferRead(&Channel->Inbound, Buffer, userLen,
-			     (desc.DataOffset8 << 3));
-
-	spin_unlock_irqrestore(&Channel->inbound_lock, flags);
-
-	DPRINT_EXIT(VMBUS);
-
-	return 0;
-}
-EXPORT_SYMBOL(VmbusChannelRecvPacket);
-
-/*
- * VmbusChannelRecvPacketRaw - Retrieve the raw packet on the specified channel
- */
-int VmbusChannelRecvPacketRaw(struct vmbus_channel *Channel, void *Buffer,
-			      u32 BufferLen, u32 *BufferActualLen,
-			      u64 *RequestId)
-{
-	struct vmpacket_descriptor desc;
-	u32 packetLen;
-	u32 userLen;
-	int ret;
-	unsigned long flags;
-
-	DPRINT_ENTER(VMBUS);
-
-	*BufferActualLen = 0;
-	*RequestId = 0;
-
-	spin_lock_irqsave(&Channel->inbound_lock, flags);
-
-	ret = RingBufferPeek(&Channel->Inbound, &desc,
-			     sizeof(struct vmpacket_descriptor));
-	if (ret != 0) {
-		spin_unlock_irqrestore(&Channel->inbound_lock, flags);
-
-		/* DPRINT_DBG(VMBUS, "nothing to read!!"); */
-		DPRINT_EXIT(VMBUS);
-		return 0;
-	}
-
-	/* VmbusChannelClearEvent(Channel); */
-
-	packetLen = desc.Length8 << 3;
-	userLen = packetLen - (desc.DataOffset8 << 3);
-
-	DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d "
-		   "flag %d tid %llx pktlen %d datalen %d> ",
-		   Channel, Channel->OfferMsg.ChildRelId, desc.Type,
-		   desc.Flags, desc.TransactionId, packetLen, userLen);
-
-	*BufferActualLen = packetLen;
-
-	if (packetLen > BufferLen) {
-		spin_unlock_irqrestore(&Channel->inbound_lock, flags);
-
-		DPRINT_ERR(VMBUS, "buffer too small - needed %d bytes but "
-			   "got space for only %d bytes", packetLen, BufferLen);
-		DPRINT_EXIT(VMBUS);
-		return -2;
-	}
-
-	*RequestId = desc.TransactionId;
-
-	/* Copy over the entire packet to the user buffer */
-	ret = RingBufferRead(&Channel->Inbound, Buffer, packetLen, 0);
-
-	spin_unlock_irqrestore(&Channel->inbound_lock, flags);
-
-	DPRINT_EXIT(VMBUS);
-
-	return 0;
-}
-
-/*
- * VmbusChannelOnChannelEvent - Channel event callback
- */
-void VmbusChannelOnChannelEvent(struct vmbus_channel *Channel)
-{
-	DumpVmbusChannel(Channel);
-	/* ASSERT(Channel->OnChannelCallback); */
-
-	Channel->OnChannelCallback(Channel->ChannelCallbackContext);
-
-	mod_timer(&Channel->poll_timer, jiffies + usecs_to_jiffies(100));
-}
-
-/*
- * VmbusChannelOnTimer - Timer event callback
- */
-void VmbusChannelOnTimer(unsigned long data)
-{
-	struct vmbus_channel *channel = (struct vmbus_channel *)data;
-
-	if (channel->OnChannelCallback)
-		channel->OnChannelCallback(channel->ChannelCallbackContext);
-}
-
-/*
- * DumpVmbusChannel - Dump vmbus channel info to the console
- */
-static void DumpVmbusChannel(struct vmbus_channel *Channel)
-{
-	DPRINT_DBG(VMBUS, "Channel (%d)", Channel->OfferMsg.ChildRelId);
-	DumpRingInfo(&Channel->Outbound, "Outbound ");
-	DumpRingInfo(&Channel->Inbound, "Inbound ");
-}