134 lines
3.2 KiB
C
134 lines
3.2 KiB
C
/*
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*
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* Copyright (c) 2009, Microsoft Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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* Place - Suite 330, Boston, MA 02111-1307 USA.
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*
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* Authors:
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* Haiyang Zhang <haiyangz@microsoft.com>
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* Hank Janssen <hjanssen@microsoft.com>
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*
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*/
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#ifndef _VMBUS_PRIVATE_H_
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#define _VMBUS_PRIVATE_H_
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#include "hv.h"
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#include "vmbus_api.h"
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#include "channel.h"
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#include "channel_mgmt.h"
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#include "ring_buffer.h"
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#include <linux/list.h>
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/*
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* Maximum channels is determined by the size of the interrupt page
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* which is PAGE_SIZE. 1/2 of PAGE_SIZE is for send endpoint interrupt
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* and the other is receive endpoint interrupt
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*/
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#define MAX_NUM_CHANNELS ((PAGE_SIZE >> 1) << 3) /* 16348 channels */
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/* The value here must be in multiple of 32 */
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/* TODO: Need to make this configurable */
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#define MAX_NUM_CHANNELS_SUPPORTED 256
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enum vmbus_connect_state {
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DISCONNECTED,
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CONNECTING,
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CONNECTED,
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DISCONNECTING
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};
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#define MAX_SIZE_CHANNEL_MESSAGE HV_MESSAGE_PAYLOAD_BYTE_COUNT
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struct vmbus_connection {
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enum vmbus_connect_state conn_state;
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atomic_t next_gpadl_handle;
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/*
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* Represents channel interrupts. Each bit position represents a
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* channel. When a channel sends an interrupt via VMBUS, it finds its
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* bit in the sendInterruptPage, set it and calls Hv to generate a port
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* event. The other end receives the port event and parse the
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* recvInterruptPage to see which bit is set
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*/
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void *int_page;
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void *send_int_page;
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void *recv_int_page;
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/*
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* 2 pages - 1st page for parent->child notification and 2nd
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* is child->parent notification
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*/
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void *monitor_pages;
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struct list_head chn_msg_list;
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spinlock_t channelmsg_lock;
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/* List of channels */
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struct list_head chn_list;
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spinlock_t channel_lock;
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struct workqueue_struct *work_queue;
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};
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struct vmbus_msginfo {
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/* Bookkeeping stuff */
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struct list_head msglist_entry;
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/* Synchronize the request/response if needed */
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int wait_condition;
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wait_queue_head_t wait_event;
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/* The message itself */
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unsigned char msg[0];
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};
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extern struct vmbus_connection vmbus_connection;
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/* General vmbus interface */
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struct hv_device *vmbus_child_device_create(struct hv_guid *type,
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struct hv_guid *instance,
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struct vmbus_channel *channel);
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int vmbus_child_device_register(struct hv_device *child_device_obj);
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void vmbus_child_device_unregister(struct hv_device *device_obj);
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/* static void */
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/* VmbusChildDeviceDestroy( */
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/* struct hv_device *); */
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struct vmbus_channel *relid2channel(u32 relid);
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/* Connection interface */
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int vmbus_connect(void);
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int vmbus_disconnect(void);
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int vmbus_post_msg(void *buffer, size_t buflen);
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int vmbus_set_event(u32 child_relid);
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void vmbus_on_event(unsigned long data);
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#endif /* _VMBUS_PRIVATE_H_ */
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