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Diffstat (limited to 'drivers/staging/hv/ChannelMgmt.h')
| -rw-r--r-- | drivers/staging/hv/ChannelMgmt.h | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/drivers/staging/hv/ChannelMgmt.h b/drivers/staging/hv/ChannelMgmt.h new file mode 100644 index 000000000000..ea901dc227ed --- /dev/null +++ b/drivers/staging/hv/ChannelMgmt.h @@ -0,0 +1,156 @@ +/* + * + * 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_MGMT_H_ +#define _CHANNEL_MGMT_H_ + +#include "include/osd.h" +#include "include/List.h" +#include "RingBuffer.h" + +#include "include/VmbusChannelInterface.h" +#include "include/ChannelMessages.h" + + + +typedef void (*PFN_CHANNEL_CALLBACK)(void * context); + +typedef enum { + CHANNEL_OFFER_STATE, + CHANNEL_OPENING_STATE, + CHANNEL_OPEN_STATE, +} VMBUS_CHANNEL_STATE; + +typedef struct _VMBUS_CHANNEL { + LIST_ENTRY ListEntry; + + struct hv_device *DeviceObject; + + struct timer_list poll_timer; /* SA-111 workaround */ + + VMBUS_CHANNEL_STATE State; + + VMBUS_CHANNEL_OFFER_CHANNEL OfferMsg; + /* These are based on the OfferMsg.MonitorId. Save it here for easy access. */ + u8 MonitorGroup; + u8 MonitorBit; + + u32 RingBufferGpadlHandle; + + /* Allocated memory for ring buffer */ + void * RingBufferPages; + u32 RingBufferPageCount; + RING_BUFFER_INFO Outbound; /* send to parent */ + RING_BUFFER_INFO Inbound; /* receive from parent */ + spinlock_t inbound_lock; + struct workqueue_struct *ControlWQ; + + /* Channel callback are invoked in this workqueue context */ + /* HANDLE dataWorkQueue; */ + + PFN_CHANNEL_CALLBACK OnChannelCallback; + void * ChannelCallbackContext; + +} VMBUS_CHANNEL; + + +typedef struct _VMBUS_CHANNEL_DEBUG_INFO { + u32 RelId; + VMBUS_CHANNEL_STATE State; + GUID InterfaceType; + GUID InterfaceInstance; + u32 MonitorId; + u32 ServerMonitorPending; + u32 ServerMonitorLatency; + u32 ServerMonitorConnectionId; + u32 ClientMonitorPending; + u32 ClientMonitorLatency; + u32 ClientMonitorConnectionId; + + RING_BUFFER_DEBUG_INFO Inbound; + RING_BUFFER_DEBUG_INFO Outbound; +} VMBUS_CHANNEL_DEBUG_INFO; + + +typedef union { + VMBUS_CHANNEL_VERSION_SUPPORTED VersionSupported; + VMBUS_CHANNEL_OPEN_RESULT OpenResult; + VMBUS_CHANNEL_GPADL_TORNDOWN GpadlTorndown; + VMBUS_CHANNEL_GPADL_CREATED GpadlCreated; + VMBUS_CHANNEL_VERSION_RESPONSE VersionResponse; +} VMBUS_CHANNEL_MESSAGE_RESPONSE; + + +/* + * Represents each channel msg on the vmbus connection This is a + * variable-size data structure depending on the msg type itself + */ + +typedef struct _VMBUS_CHANNEL_MSGINFO { + /* Bookkeeping stuff */ + LIST_ENTRY MsgListEntry; + + /* So far, this is only used to handle gpadl body message */ + LIST_ENTRY SubMsgList; + + /* Synchronize the request/response if needed */ + struct osd_waitevent *WaitEvent; + + VMBUS_CHANNEL_MESSAGE_RESPONSE Response; + + u32 MessageSize; + /* The channel message that goes out on the "wire". */ + /* It will contain at minimum the VMBUS_CHANNEL_MESSAGE_HEADER header */ + unsigned char Msg[0]; +} VMBUS_CHANNEL_MSGINFO; + + +/* Routines */ + +static VMBUS_CHANNEL* +AllocVmbusChannel( + void + ); + +static void +FreeVmbusChannel( + VMBUS_CHANNEL *Channel + ); + +static void +VmbusOnChannelMessage( + void *Context + ); + +static int +VmbusChannelRequestOffers( + void + ); + +static void +VmbusChannelReleaseUnattachedChannels( + void + ); + +#endif /* _CHANNEL_MGMT_H_ */ |