VIRTUAL_HW_INITIALIZATION_DATA structure (storport.h)
The VIRTUAL_HW_INITIALIZATION_DATA structure contains information particular to each virtual miniport driver.
Syntax
typedef struct _VIRTUAL_HW_INITIALIZATION_DATA {
ULONG HwInitializationDataSize;
INTERFACE_TYPE AdapterInterfaceType;
PHW_INITIALIZE HwInitialize;
PHW_STARTIO HwStartIo;
PHW_INTERRUPT HwInterrupt;
PVIRTUAL_HW_FIND_ADAPTER HwFindAdapter;
PHW_RESET_BUS HwResetBus;
PHW_DMA_STARTED HwDmaStarted;
PHW_ADAPTER_STATE HwAdapterState;
ULONG DeviceExtensionSize;
ULONG SpecificLuExtensionSize;
ULONG SrbExtensionSize;
ULONG NumberOfAccessRanges;
PVOID Reserved;
UCHAR MapBuffers;
BOOLEAN NeedPhysicalAddresses;
BOOLEAN TaggedQueuing;
BOOLEAN AutoRequestSense;
BOOLEAN MultipleRequestPerLu;
BOOLEAN ReceiveEvent;
USHORT VendorIdLength;
PVOID VendorId;
union {
USHORT ReservedUshort;
USHORT PortVersionFlags;
};
USHORT DeviceIdLength;
PVOID DeviceId;
PHW_ADAPTER_CONTROL HwAdapterControl;
PHW_BUILDIO HwBuildIo;
PHW_FREE_ADAPTER_RESOURCES HwFreeAdapterResources;
PHW_PROCESS_SERVICE_REQUEST HwProcessServiceRequest;
PHW_COMPLETE_SERVICE_IRP HwCompleteServiceIrp;
PHW_INITIALIZE_TRACING HwInitializeTracing;
PHW_CLEANUP_TRACING HwCleanupTracing;
} VIRTUAL_HW_INITIALIZATION_DATA, *PVIRTUAL_HW_INITIALIZATION_DATA;
Members
HwInitializationDataSize
Specifies the size of this structure in bytes, as returned by sizeof(). This member indicates the version of this structure that is used by the virtual miniport driver. A virtual miniport driver's DriverEntry routine should set this member's value for the port driver.
AdapterInterfaceType
For storport virtual miniport drivers, the value for AdapterInterfaceType will almost always be internal. This is because the Storport driver does not support legacy buses.
Note that because of this, most of the adapter interface types that are used with the SCSI port driver are invalid for Storport drivers. In particular, Storport does not support:
- Isa
- Eisa
- MicroChannel
- TurboChannel
Additionally, unlike the SCSI port case, a virtual miniport driver that works with the Storport driver is not required to supply values for the following members:
- VendorIdLength
- VendorId
- DeviceIdLength
- DeviceId
HwInitialize
A pointer to the virtual miniport driver's HwStorInitialize routine, which is a required entry point for all virtual miniport drivers.
HwStartIo
A pointer to the virtual miniport driver's HwStorStartIo routine, which is a required entry point for all virtual miniport drivers.
HwInterrupt
Not used. Virtual miniport drivers do not process interrupts.
HwFindAdapter
A pointer to the virtual miniport driver's VirtualHwStorFindAdapter routine, which is a required entry point for all virtual miniport drivers.
HwResetBus
A pointer to the virtual miniport driver's HwStorResetBus routine, which is a required entry point for all virtual miniport drivers.
HwDmaStarted
Not used. Virtual miniport drivers do not perform DMA.
HwAdapterState
The Storport driver does not support legacy drivers. Therefore, this member must be NULL.
DeviceExtensionSize
Specifies the size, in bytes, that is required by the virtual miniport driver for its per-adapter non-paged device extension. A virtual miniport driver uses its device extension as storage for driver-determined adapter information. The operating system-specific port driver initializes each device extension that it allocates with zeros, and passes a pointer to the adapter-specific device extension in most calls to the virtual miniport driver. The given size does not include any virtual miniport driver-requested per-logical-unit storage.
SpecificLuExtensionSize
Specifies the size, in bytes, that is required by the virtual miniport driver for its per-logical-unit non-paged storage, if any. A virtual miniport driver can use its logical unit (LU) extensions as storage for driver-determined LU information about peripherals on the virtual bus. The operating system-specific port driver initializes each LU extension that it allocates with zeros. Leave this member set to zero if the virtual miniport driver does not maintain per-LU information for which it requires storage.
SrbExtensionSize
Specifies the size, in bytes, that is required by the virtual miniport driver for its per-request non-paged storage, if any. Because virtual miniport drivers that work with the Storport driver must support scatter/gather lists, and the per-SRB scatter/gather lists are usually allocated in the SRB extension, this member is rarely zero.
NumberOfAccessRanges
Not used. Virtual miniport drivers do not support hardware.
Reserved
Reserved for system use.
MapBuffers
| Name | Description |
|---|---|
| STOR_MAP_NO_BUFFERS | Only maps buffer for SRB_FUNCTION_IO_CONTROL and SRB_FUNCTION_WMI. |
| STOR_MAP_ALL_BUFFERS | Obsolete, same behavior as STOR_MAP_NON_READ_WRITE_BUFFERS. |
| STOR_MAP_NON_READ_WRITE_BUFFERS | Maps buffer for IO requests except READ and WRITE. |
| STOR_MAP_ALL_BUFFERS_INCLUDING_READ_WRITE | Maps buffer for all IO requests including READ and WRITE. Miniport drivers will typically use this setting. |
NeedPhysicalAddresses
Not used. Virtual miniport drivers do not support hardware.
TaggedQueuing
Must be set to TRUE. A value of TRUE indicates that the virtual miniport driver supports tagged queuing.
AutoRequestSense
Must be set to TRUE. A value of TRUE indicates that the HBA can perform a request-sense operation without requiring an explicit request to do so.
MultipleRequestPerLu
Must be set to TRUE. A value of TRUE indicates that the virtual miniport driver can queue multiple requests per logical unit (LU).
ReceiveEvent
This value is no longer used, and can be set to either TRUE or FALSE.
VendorIdLength
The length, in bytes, of the vendor identifier.
VendorId
The vendor identifier.
ReservedUshort
Reserved.
PortVersionFlags
A bitmap of flags that indicate the features that the port driver supports. Currently, the only flag available is SP_VER_TRACE_SUPPORT, which indicates that the port driver supports tracing.
DeviceIdLength
The length, in bytes, of the device identifier.
DeviceId
The device identifier.
HwAdapterControl
A pointer to the virtual miniport driver's HwStorAdapterControl routine.
HwBuildIo
This member is not used.
HwFreeAdapterResources
A pointer to the virtual miniport driver's HwStorFreeAdapterResources routine, which is a required entry point for all virtual miniport drivers.
HwProcessServiceRequest
A pointer to the virtual miniport driver's HwStorProcessServiceRequest routine.
HwCompleteServiceIrp
A pointer to the virtual miniport driver's HwStorCompleteServiceIrp routine.
HwInitializeTracing
A pointer to the virtual miniport driver's HwStorInitializeTracing routine.
HwCleanupTracing
A pointer to the virtual miniport driver's HwStorCleanupTracing routine.
Remarks
If a virtual miniport driver will execute only on Windows 8 or later, the driver should use the HW_INITIALIZATION_DATA structure instead of VIRTUAL_HW_INITIALIZATION_DATA.
Requirements
| Requirement | Value |
|---|---|
| Header | storport.h (include Storport.h) |
See also
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