* Hank Janssen <hjanssen@microsoft.com>
*
*/
-
-
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/vmalloc.h>
#include "logging.h"
#include "VmbusPrivate.h"
-/* Globals */
-
struct VMBUS_CONNECTION gVmbusConnection = {
.ConnectState = Disconnected,
.NextGpadlHandle = ATOMIC_INIT(0xE1E10),
};
-
-/*++
-
-Name:
- VmbusConnect()
-
-Description:
- Sends a connect request on the partition service connection
-
---*/
+/**
+ * VmbusConnect - Sends a connect request on the partition service connection
+ */
int VmbusConnect(void)
{
- int ret=0;
+ int ret = 0;
struct vmbus_channel_msginfo *msgInfo = NULL;
struct vmbus_channel_initiate_contact *msg;
unsigned long flags;
/* Initialize the vmbus connection */
gVmbusConnection.ConnectState = Connecting;
gVmbusConnection.WorkQueue = create_workqueue("hv_vmbus_con");
- if (!gVmbusConnection.WorkQueue)
- {
+ if (!gVmbusConnection.WorkQueue) {
ret = -1;
goto Cleanup;
}
* abstraction stuff
*/
gVmbusConnection.InterruptPage = osd_PageAlloc(1);
- if (gVmbusConnection.InterruptPage == NULL)
- {
+ if (gVmbusConnection.InterruptPage == NULL) {
ret = -1;
goto Cleanup;
}
gVmbusConnection.RecvInterruptPage = gVmbusConnection.InterruptPage;
- gVmbusConnection.SendInterruptPage = (void*)((unsigned long)gVmbusConnection.InterruptPage + (PAGE_SIZE >> 1));
+ gVmbusConnection.SendInterruptPage =
+ (void *)((unsigned long)gVmbusConnection.InterruptPage +
+ (PAGE_SIZE >> 1));
- /* Setup the monitor
- * notification facility. The 1st page for parent->child and
- * the 2nd page for child->parent
+ /*
+ * Setup the monitor notification facility. The 1st page for
+ * parent->child and the 2nd page for child->parent
*/
gVmbusConnection.MonitorPages = osd_PageAlloc(2);
- if (gVmbusConnection.MonitorPages == NULL)
- {
+ if (gVmbusConnection.MonitorPages == NULL) {
ret = -1;
goto Cleanup;
}
- msgInfo = kzalloc(sizeof(*msgInfo) + sizeof(struct vmbus_channel_initiate_contact), GFP_KERNEL);
- if (msgInfo == NULL)
- {
+ msgInfo = kzalloc(sizeof(*msgInfo) +
+ sizeof(struct vmbus_channel_initiate_contact),
+ GFP_KERNEL);
+ if (msgInfo == NULL) {
ret = -1;
goto Cleanup;
}
msg->VMBusVersionRequested = VMBUS_REVISION_NUMBER;
msg->InterruptPage = virt_to_phys(gVmbusConnection.InterruptPage);
msg->MonitorPage1 = virt_to_phys(gVmbusConnection.MonitorPages);
- msg->MonitorPage2 = virt_to_phys((void *)((unsigned long)gVmbusConnection.MonitorPages + PAGE_SIZE));
+ msg->MonitorPage2 = virt_to_phys(
+ (void *)((unsigned long)gVmbusConnection.MonitorPages +
+ PAGE_SIZE));
/*
* Add to list before we send the request since we may
* receive the response before returning from this routine
*/
spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags);
- INSERT_TAIL_LIST(&gVmbusConnection.ChannelMsgList, &msgInfo->MsgListEntry);
+ INSERT_TAIL_LIST(&gVmbusConnection.ChannelMsgList,
+ &msgInfo->MsgListEntry);
spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags);
- DPRINT_DBG(VMBUS, "Vmbus connection - interrupt pfn %llx, monitor1 pfn %llx,, monitor2 pfn %llx",
- msg->InterruptPage, msg->MonitorPage1, msg->MonitorPage2);
+ DPRINT_DBG(VMBUS, "Vmbus connection - interrupt pfn %llx, "
+ "monitor1 pfn %llx,, monitor2 pfn %llx",
+ msg->InterruptPage, msg->MonitorPage1, msg->MonitorPage2);
DPRINT_DBG(VMBUS, "Sending channel initiate msg...");
-
- ret = VmbusPostMessage(msg, sizeof(struct vmbus_channel_initiate_contact));
- if (ret != 0)
- {
+ ret = VmbusPostMessage(msg,
+ sizeof(struct vmbus_channel_initiate_contact));
+ if (ret != 0) {
REMOVE_ENTRY_LIST(&msgInfo->MsgListEntry);
goto Cleanup;
}
REMOVE_ENTRY_LIST(&msgInfo->MsgListEntry);
/* Check if successful */
- if (msgInfo->Response.VersionResponse.VersionSupported)
- {
+ if (msgInfo->Response.VersionResponse.VersionSupported) {
DPRINT_INFO(VMBUS, "Vmbus connected!!");
gVmbusConnection.ConnectState = Connected;
- }
- else
- {
- DPRINT_ERR(VMBUS, "Vmbus connection failed!!...current version (%d) not supported", VMBUS_REVISION_NUMBER);
+ } else {
+ DPRINT_ERR(VMBUS, "Vmbus connection failed!!..."
+ "current version (%d) not supported",
+ VMBUS_REVISION_NUMBER);
ret = -1;
-
goto Cleanup;
}
-
kfree(msgInfo->WaitEvent);
kfree(msgInfo);
DPRINT_EXIT(VMBUS);
return 0;
Cleanup:
-
gVmbusConnection.ConnectState = Disconnected;
if (gVmbusConnection.WorkQueue)
destroy_workqueue(gVmbusConnection.WorkQueue);
- if (gVmbusConnection.InterruptPage)
- {
+ if (gVmbusConnection.InterruptPage) {
osd_PageFree(gVmbusConnection.InterruptPage, 1);
gVmbusConnection.InterruptPage = NULL;
}
- if (gVmbusConnection.MonitorPages)
- {
+ if (gVmbusConnection.MonitorPages) {
osd_PageFree(gVmbusConnection.MonitorPages, 2);
gVmbusConnection.MonitorPages = NULL;
}
- if (msgInfo)
- {
- if (msgInfo->WaitEvent)
- kfree(msgInfo->WaitEvent);
-
+ if (msgInfo) {
+ kfree(msgInfo->WaitEvent);
kfree(msgInfo);
}
return ret;
}
-
-/*++
-
-Name:
- VmbusDisconnect()
-
-Description:
- Sends a disconnect request on the partition service connection
-
---*/
+/**
+ * VmbusDisconnect - Sends a disconnect request on the partition service connection
+ */
int VmbusDisconnect(void)
{
- int ret=0;
+ int ret = 0;
struct vmbus_channel_message_header *msg;
DPRINT_ENTER(VMBUS);
msg->MessageType = ChannelMessageUnload;
- ret = VmbusPostMessage(msg, sizeof(struct vmbus_channel_message_header));
-
+ ret = VmbusPostMessage(msg,
+ sizeof(struct vmbus_channel_message_header));
if (ret != 0)
- {
goto Cleanup;
- }
osd_PageFree(gVmbusConnection.InterruptPage, 1);
/* TODO: iterate thru the msg list and free up */
-
destroy_workqueue(gVmbusConnection.WorkQueue);
gVmbusConnection.ConnectState = Disconnected;
DPRINT_INFO(VMBUS, "Vmbus disconnected!!");
Cleanup:
- if (msg)
- {
- kfree(msg);
- }
-
+ kfree(msg);
DPRINT_EXIT(VMBUS);
-
return ret;
}
-
-/*++
-
-Name:
- GetChannelFromRelId()
-
-Description:
- Get the channel object given its child relative id (ie channel id)
-
---*/
+/**
+ * GetChannelFromRelId - Get the channel object given its child relative id (ie channel id)
+ */
struct vmbus_channel *GetChannelFromRelId(u32 relId)
{
struct vmbus_channel *channel;
struct vmbus_channel *foundChannel = NULL;
- LIST_ENTRY* anchor;
- LIST_ENTRY* curr;
+ LIST_ENTRY *anchor;
+ LIST_ENTRY *curr;
unsigned long flags;
spin_lock_irqsave(&gVmbusConnection.channel_lock, flags);
- ITERATE_LIST_ENTRIES(anchor, curr, &gVmbusConnection.ChannelList)
- {
- channel = CONTAINING_RECORD(curr, struct vmbus_channel, ListEntry);
+ ITERATE_LIST_ENTRIES(anchor, curr, &gVmbusConnection.ChannelList) {
+ channel = CONTAINING_RECORD(curr, struct vmbus_channel,
+ ListEntry);
- if (channel->OfferMsg.ChildRelId == relId)
- {
+ if (channel->OfferMsg.ChildRelId == relId) {
foundChannel = channel;
break;
}
return foundChannel;
}
-
-
-/*++
-
-Name:
- VmbusProcessChannelEvent()
-
-Description:
- Process a channel event notification
-
---*/
-static void
-VmbusProcessChannelEvent(
- void * context
- )
+/**
+ * VmbusProcessChannelEvent - Process a channel event notification
+ */
+static void VmbusProcessChannelEvent(void *context)
{
struct vmbus_channel *channel;
u32 relId = (u32)(unsigned long)context;
*/
channel = GetChannelFromRelId(relId);
- if (channel)
- {
+ if (channel) {
VmbusChannelOnChannelEvent(channel);
- /* WorkQueueQueueWorkItem(channel->dataWorkQueue, VmbusChannelOnChannelEvent, (void*)channel); */
- }
- else
- {
- DPRINT_ERR(VMBUS, "channel not found for relid - %d.", relId);
+ /*
+ * WorkQueueQueueWorkItem(channel->dataWorkQueue,
+ * VmbusChannelOnChannelEvent,
+ * (void*)channel);
+ */
+ } else {
+ DPRINT_ERR(VMBUS, "channel not found for relid - %d.", relId);
}
}
-
-/*++
-
-Name:
- VmbusOnEvents()
-
-Description:
- Handler for events
-
---*/
+/**
+ * VmbusOnEvents - Handler for events
+ */
void VmbusOnEvents(void)
{
int dword;
- /* int maxdword = PAGE_SIZE >> 3; // receive size is 1/2 page and divide that by 4 bytes */
int maxdword = MAX_NUM_CHANNELS_SUPPORTED >> 5;
int bit;
int relid;
- u32* recvInterruptPage = gVmbusConnection.RecvInterruptPage;
- /* VMBUS_CHANNEL_MESSAGE* receiveMsg; */
+ u32 *recvInterruptPage = gVmbusConnection.RecvInterruptPage;
DPRINT_ENTER(VMBUS);
/* Check events */
- if (recvInterruptPage)
- {
- for (dword = 0; dword < maxdword; dword++)
- {
- if (recvInterruptPage[dword])
- {
- for (bit = 0; bit < 32; bit++)
- {
- if (test_and_clear_bit(bit, (unsigned long *) &recvInterruptPage[dword]))
- {
+ if (recvInterruptPage) {
+ for (dword = 0; dword < maxdword; dword++) {
+ if (recvInterruptPage[dword]) {
+ for (bit = 0; bit < 32; bit++) {
+ if (test_and_clear_bit(bit, (unsigned long *)&recvInterruptPage[dword])) {
relid = (dword << 5) + bit;
-
DPRINT_DBG(VMBUS, "event detected for relid - %d", relid);
- if (relid == 0) /* special case - vmbus channel protocol msg */
- {
+ if (relid == 0) {
+ /* special case - vmbus channel protocol msg */
DPRINT_DBG(VMBUS, "invalid relid - %d", relid);
-
- continue; }
- else
- {
+ continue;
+ } else {
/* QueueWorkItem(VmbusProcessEvent, (void*)relid); */
/* ret = WorkQueueQueueWorkItem(gVmbusConnection.workQueue, VmbusProcessChannelEvent, (void*)relid); */
- VmbusProcessChannelEvent((void*)(unsigned long)relid);
+ VmbusProcessChannelEvent((void *)(unsigned long)relid);
}
}
}
return;
}
-/*++
-
-Name:
- VmbusPostMessage()
-
-Description:
- Send a msg on the vmbus's message connection
-
---*/
+/**
+ * VmbusPostMessage - Send a msg on the vmbus's message connection
+ */
int VmbusPostMessage(void *buffer, size_t bufferLen)
{
- int ret=0;
union hv_connection_id connId;
-
- connId.Asu32 =0;
+ connId.Asu32 = 0;
connId.u.Id = VMBUS_MESSAGE_CONNECTION_ID;
- ret = HvPostMessage(
- connId,
- 1,
- buffer,
- bufferLen);
-
- return ret;
+ return HvPostMessage(connId, 1, buffer, bufferLen);
}
-/*++
-
-Name:
- VmbusSetEvent()
-
-Description:
- Send an event notification to the parent
-
---*/
+/**
+ * VmbusSetEvent - Send an event notification to the parent
+ */
int VmbusSetEvent(u32 childRelId)
{
- int ret=0;
+ int ret = 0;
DPRINT_ENTER(VMBUS);
/* Each u32 represents 32 channels */
set_bit(childRelId & 31,
- (unsigned long *) gVmbusConnection.SendInterruptPage + (childRelId >> 5));
+ (unsigned long *)gVmbusConnection.SendInterruptPage +
+ (childRelId >> 5));
ret = HvSignalEvent();
return ret;
}
-
-/* EOF */
projects / platform / kernel / linux-stable.git / commitdiff