1 files changed, 0 insertions, 346 deletions
diff --git a/drivers/staging/hv/connection.c b/drivers/staging/hv/connection.c
deleted file mode 100644
index afc8116e7aa..00000000000
--- a/drivers/staging/hv/connection.c
+++ /dev/null
@@ -1,346 +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/sched.h>
-#include <linux/wait.h>
-#include <linux/mm.h>
-#include <linux/slab.h>
-#include <linux/vmalloc.h>
-#include "hv_api.h"
-#include "logging.h"
-#include "vmbus_private.h"
-
-
-struct vmbus_connection vmbus_connection = {
-	.conn_state		= DISCONNECTED,
-	.next_gpadl_handle	= ATOMIC_INIT(0xE1E10),
-};
-
-/*
- * vmbus_connect - Sends a connect request on the partition service connection
- */
-int vmbus_connect(void)
-{
-	int ret = 0;
-	struct vmbus_channel_msginfo *msginfo = NULL;
-	struct vmbus_channel_initiate_contact *msg;
-	unsigned long flags;
-
-	/* Make sure we are not connecting or connected */
-	if (vmbus_connection.conn_state != DISCONNECTED)
-		return -1;
-
-	/* Initialize the vmbus connection */
-	vmbus_connection.conn_state = CONNECTING;
-	vmbus_connection.work_queue = create_workqueue("hv_vmbus_con");
-	if (!vmbus_connection.work_queue) {
-		ret = -1;
-		goto Cleanup;
-	}
-
-	INIT_LIST_HEAD(&vmbus_connection.chn_msg_list);
-	spin_lock_init(&vmbus_connection.channelmsg_lock);
-
-	INIT_LIST_HEAD(&vmbus_connection.chn_list);
-	spin_lock_init(&vmbus_connection.channel_lock);
-
-	/*
-	 * Setup the vmbus event connection for channel interrupt
-	 * abstraction stuff
-	 */
-	vmbus_connection.int_page =
-	(void *)__get_free_pages(GFP_KERNEL|__GFP_ZERO, 0);
-	if (vmbus_connection.int_page == NULL) {
-		ret = -1;
-		goto Cleanup;
-	}
-
-	vmbus_connection.recv_int_page = vmbus_connection.int_page;
-	vmbus_connection.send_int_page =
-		(void *)((unsigned long)vmbus_connection.int_page +
-			(PAGE_SIZE >> 1));
-
-	/*
-	 * Setup the monitor notification facility. The 1st page for
-	 * parent->child and the 2nd page for child->parent
-	 */
-	vmbus_connection.monitor_pages =
-	(void *)__get_free_pages((GFP_KERNEL|__GFP_ZERO), 1);
-	if (vmbus_connection.monitor_pages == NULL) {
-		ret = -1;
-		goto Cleanup;
-	}
-
-	msginfo = kzalloc(sizeof(*msginfo) +
-			  sizeof(struct vmbus_channel_initiate_contact),
-			  GFP_KERNEL);
-	if (msginfo == NULL) {
-		ret = -ENOMEM;
-		goto Cleanup;
-	}
-
-	init_waitqueue_head(&msginfo->waitevent);
-
-	msg = (struct vmbus_channel_initiate_contact *)msginfo->msg;
-
-	msg->header.msgtype = CHANNELMSG_INITIATE_CONTACT;
-	msg->vmbus_version_requested = VMBUS_REVISION_NUMBER;
-	msg->interrupt_page = virt_to_phys(vmbus_connection.int_page);
-	msg->monitor_page1 = virt_to_phys(vmbus_connection.monitor_pages);
-	msg->monitor_page2 = virt_to_phys(
-			(void *)((unsigned long)vmbus_connection.monitor_pages +
-				 PAGE_SIZE));
-
-	/*
-	 * Add to list before we send the request since we may
-	 * receive the response before returning from this routine
-	 */
-	spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags);
-	list_add_tail(&msginfo->msglistentry,
-		      &vmbus_connection.chn_msg_list);
-
-	spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags);
-
-	DPRINT_DBG(VMBUS, "Vmbus connection - interrupt pfn %llx, "
-		   "monitor1 pfn %llx,, monitor2 pfn %llx",
-		   msg->interrupt_page, msg->monitor_page1, msg->monitor_page2);
-
-	DPRINT_DBG(VMBUS, "Sending channel initiate msg...");
-	ret = vmbus_post_msg(msg,
-			       sizeof(struct vmbus_channel_initiate_contact));
-	if (ret != 0) {
-		spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags);
-		list_del(&msginfo->msglistentry);
-		spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock,
-					flags);
-		goto Cleanup;
-	}
-
-	/* Wait for the connection response */
-	msginfo->wait_condition = 0;
-	wait_event_timeout(msginfo->waitevent, msginfo->wait_condition,
-			msecs_to_jiffies(1000));
-	if (msginfo->wait_condition == 0) {
-		spin_lock_irqsave(&vmbus_connection.channelmsg_lock,
-				flags);
-		list_del(&msginfo->msglistentry);
-		spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock,
-					flags);
-		ret = -ETIMEDOUT;
-		goto Cleanup;
-	}
-
-	spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags);
-	list_del(&msginfo->msglistentry);
-	spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags);
-
-	/* Check if successful */
-	if (msginfo->response.version_response.version_supported) {
-		DPRINT_INFO(VMBUS, "Vmbus connected!!");
-		vmbus_connection.conn_state = CONNECTED;
-
-	} else {
-		DPRINT_ERR(VMBUS, "Vmbus connection failed!!..."
-			   "current version (%d) not supported",
-			   VMBUS_REVISION_NUMBER);
-		ret = -1;
-		goto Cleanup;
-	}
-
-	kfree(msginfo);
-	return 0;
-
-Cleanup:
-	vmbus_connection.conn_state = DISCONNECTED;
-
-	if (vmbus_connection.work_queue)
-		destroy_workqueue(vmbus_connection.work_queue);
-
-	if (vmbus_connection.int_page) {
-		free_pages((unsigned long)vmbus_connection.int_page, 0);
-		vmbus_connection.int_page = NULL;
-	}
-
-	if (vmbus_connection.monitor_pages) {
-		free_pages((unsigned long)vmbus_connection.monitor_pages, 1);
-		vmbus_connection.monitor_pages = NULL;
-	}
-
-	kfree(msginfo);
-
-	return ret;
-}
-
-/*
- * vmbus_disconnect -
- * Sends a disconnect request on the partition service connection
- */
-int vmbus_disconnect(void)
-{
-	int ret = 0;
-	struct vmbus_channel_message_header *msg;
-
-	/* Make sure we are connected */
-	if (vmbus_connection.conn_state != CONNECTED)
-		return -1;
-
-	msg = kzalloc(sizeof(struct vmbus_channel_message_header), GFP_KERNEL);
-	if (!msg)
-		return -ENOMEM;
-
-	msg->msgtype = CHANNELMSG_UNLOAD;
-
-	ret = vmbus_post_msg(msg,
-			       sizeof(struct vmbus_channel_message_header));
-	if (ret != 0)
-		goto Cleanup;
-
-	free_pages((unsigned long)vmbus_connection.int_page, 0);
-	free_pages((unsigned long)vmbus_connection.monitor_pages, 1);
-
-	/* TODO: iterate thru the msg list and free up */
-	destroy_workqueue(vmbus_connection.work_queue);
-
-	vmbus_connection.conn_state = DISCONNECTED;
-
-	DPRINT_INFO(VMBUS, "Vmbus disconnected!!");
-
-Cleanup:
-	kfree(msg);
-	return ret;
-}
-
-/*
- * relid2channel - Get the channel object given its
- * child relative id (ie channel id)
- */
-struct vmbus_channel *relid2channel(u32 relid)
-{
-	struct vmbus_channel *channel;
-	struct vmbus_channel *found_channel  = NULL;
-	unsigned long flags;
-
-	spin_lock_irqsave(&vmbus_connection.channel_lock, flags);
-	list_for_each_entry(channel, &vmbus_connection.chn_list, listentry) {
-		if (channel->offermsg.child_relid == relid) {
-			found_channel = channel;
-			break;
-		}
-	}
-	spin_unlock_irqrestore(&vmbus_connection.channel_lock, flags);
-
-	return found_channel;
-}
-
-/*
- * process_chn_event - Process a channel event notification
- */
-static void process_chn_event(void *context)
-{
-	struct vmbus_channel *channel;
-	u32 relid = (u32)(unsigned long)context;
-
-	/* ASSERT(relId > 0); */
-
-	/*
-	 * Find the channel based on this relid and invokes the
-	 * channel callback to process the event
-	 */
-	channel = relid2channel(relid);
-
-	if (channel) {
-		vmbus_onchannel_event(channel);
-		/*
-		 * WorkQueueQueueWorkItem(channel->dataWorkQueue,
-		 *			  vmbus_onchannel_event,
-		 *			  (void*)channel);
-		 */
-	} else {
-		DPRINT_ERR(VMBUS, "channel not found for relid - %d.", relid);
-	}
-}
-
-/*
- * vmbus_on_event - Handler for events
- */
-void vmbus_on_event(unsigned long data)
-{
-	int dword;
-	int maxdword = MAX_NUM_CHANNELS_SUPPORTED >> 5;
-	int bit;
-	int relid;
-	u32 *recv_int_page = vmbus_connection.recv_int_page;
-
-	/* Check events */
-	if (recv_int_page) {
-		for (dword = 0; dword < maxdword; dword++) {
-			if (recv_int_page[dword]) {
-				for (bit = 0; bit < 32; bit++) {
-					if (sync_test_and_clear_bit(bit,
-						(unsigned long *)
-						&recv_int_page[dword])) {
-						relid = (dword << 5) + bit;
-						DPRINT_DBG(VMBUS, "event detected for relid - %d", relid);
-
-						if (relid == 0) {
-							/* special case - vmbus channel protocol msg */
-							DPRINT_DBG(VMBUS, "invalid relid - %d", relid);
-							continue;
-						} else {
-							/* QueueWorkItem(VmbusProcessEvent, (void*)relid); */
-							/* ret = WorkQueueQueueWorkItem(gVmbusConnection.workQueue, VmbusProcessChannelEvent, (void*)relid); */
-						process_chn_event((void *)
-						(unsigned long)relid);
-						}
-					}
-				}
-			}
-		 }
-	}
-	return;
-}
-
-/*
- * vmbus_post_msg - Send a msg on the vmbus's message connection
- */
-int vmbus_post_msg(void *buffer, size_t buflen)
-{
-	union hv_connection_id conn_id;
-
-	conn_id.asu32 = 0;
-	conn_id.u.id = VMBUS_MESSAGE_CONNECTION_ID;
-	return hv_post_message(conn_id, 1, buffer, buflen);
-}
-
-/*
- * vmbus_set_event - Send an event notification to the parent
- */
-int vmbus_set_event(u32 child_relid)
-{
-	/* Each u32 represents 32 channels */
-	sync_set_bit(child_relid & 31,
-		(unsigned long *)vmbus_connection.send_int_page +
-		(child_relid >> 5));
-
-	return hv_signal_event();
-}