588 lines
17 KiB
C
588 lines
17 KiB
C
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/*++ BUILD Version: 0000 // Increment this if a change has global effects
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Copyright (c) Microsoft Corporation. All rights reserved.
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Module Name:
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scsiwmi.h
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Abstract:
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This module contains the internal structure definitions and APIs used by
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the SCSI WMILIB helper functions
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Author:
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AlanWar
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Revision History:
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--*/
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#ifndef _SCSIWMI_
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#define _SCSIWMI_
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#if defined (_MSC_VER) && (_MSC_VER >= 1020)
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#pragma once
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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//
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// This is a per-request context buffer that is needed for every wmi srb.
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// The request context must remain valid throughout the entire processing
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// of the srb, at least until ScsiPortWmiPostProcess returns with the
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// final srb return status and buffer size. If the srb can
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// pend then memory for this buffer should be allocated from the SRB
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// extension. If not then the memory can be allocated from a stack frame that
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// does not go out of scope.
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//
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typedef struct
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{
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PVOID UserContext; // Available for miniport use
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ULONG BufferSize; // Reserved for SCSIWMI use
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PUCHAR Buffer; // Reserved for SCSIWMI use
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UCHAR MinorFunction;// Reserved for SCSIWMI use
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UCHAR ReturnStatus; // Available to miniport after ScsiPortWmiPostProcess
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ULONG ReturnSize; // Available to miniport after ScsiPortWmiPostProcess
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} SCSIWMI_REQUEST_CONTEXT, *PSCSIWMI_REQUEST_CONTEXT;
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#define ScsiPortWmiGetReturnStatus(RequestContext) ((RequestContext)->ReturnStatus)
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#define ScsiPortWmiGetReturnSize(RequestContext) ((RequestContext)->ReturnSize)
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//
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// This defines a guid to be registered with WMI.
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//
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typedef struct
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{
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LPCGUID Guid; // Guid representing data block
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ULONG InstanceCount; // Count of Instances of Datablock
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ULONG Flags; // Additional flags (see WMIREGINFO in wmistr.h)
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} SCSIWMIGUIDREGINFO, *PSCSIWMIGUIDREGINFO;
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typedef
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UCHAR
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(*PSCSIWMI_QUERY_REGINFO) (
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IN PVOID DeviceContext,
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IN PSCSIWMI_REQUEST_CONTEXT RequestContext,
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OUT PWCHAR *MofResourceName
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);
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/*++
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Routine Description:
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This routine is a callback into the miniport to retrieve information about
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the guids being registered.
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This callback is synchronous and may not be pended. Also
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ScsiPortWmiPostProcess should not be called from within this callback.
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Arguments:
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DeviceContext is a caller specified context value originally passed to
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ScsiPortWmiDispatchFunction.
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RequestContext is a context associated with the srb being processed.
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MofResourceName returns with a pointer to a WCHAR string with name of
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the MOF resource attached to the miniport binary image file. If
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the driver does not have a mof resource attached then this can
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be returned as NULL.
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Return Value:
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TRUE if request is pending else FALSE
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--*/
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typedef
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BOOLEAN
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(*PSCSIWMI_QUERY_DATABLOCK) (
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IN PVOID Context,
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IN PSCSIWMI_REQUEST_CONTEXT DispatchContext,
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IN ULONG GuidIndex,
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IN ULONG InstanceIndex,
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IN ULONG InstanceCount,
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IN OUT PULONG InstanceLengthArray,
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IN ULONG BufferAvail,
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OUT PUCHAR Buffer
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);
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/*++
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Routine Description:
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This routine is a callback into the miniport to query for the contents of
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one or more instances of a data block. This callback may be called with
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an output buffer that is too small to return all of the data queried.
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In this case the callback is responsible to report the correct output
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buffer size needed.
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If the request can be completed immediately without pending,
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ScsiPortWmiPostProcess should be called from within this callback and
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FALSE returned.
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If the request cannot be completed within this callback then TRUE should
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be returned. Once the pending operations are finished the miniport should
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call ScsiPortWmiPostProcess and then complete the srb.
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Arguments:
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DeviceContext is a caller specified context value originally passed to
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ScsiPortWmiDispatchFunction.
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RequestContext is a context associated with the srb being processed.
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GuidIndex is the index into the list of guids provided when the
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miniport registered
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InstanceIndex is the index that denotes first instance of the data block
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is being queried.
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InstanceCount is the number of instances expected to be returned for
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the data block.
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InstanceLengthArray is a pointer to an array of ULONG that returns the
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lengths of each instance of the data block. This may be NULL when
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there is not enough space in the output buffer to fufill the request.
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In this case the miniport should call ScsiPortWmiPostProcess with
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a status of SRB_STATUS_DATA_OVERRUN and the size of the output buffer
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needed to fufill the request.
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BufferAvail on entry has the maximum size available to write the data
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blocks in the output buffer. If the output buffer is not large enough
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to return all of the data blocks then the miniport should call
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ScsiPortWmiPostProcess with a status of SRB_STATUS_DATA_OVERRUN
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and the size of the output buffer needed to fufill the request.
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Buffer on return is filled with the returned data blocks. Note that each
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instance of the data block must be aligned on a 8 byte boundry. This
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may be NULL when there is not enough space in the output buffer to
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fufill the request. In this case the miniport should call
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ScsiPortWmiPostProcess with a status of SRB_STATUS_DATA_OVERRUN and
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the size of the output buffer needed to fufill the request.
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Return Value:
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TRUE if request is pending else FALSE
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--*/
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typedef
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BOOLEAN
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(*PSCSIWMI_SET_DATABLOCK) (
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IN PVOID DeviceContext,
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IN PSCSIWMI_REQUEST_CONTEXT RequestContext,
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IN ULONG GuidIndex,
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IN ULONG InstanceIndex,
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IN ULONG BufferSize,
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IN PUCHAR Buffer
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);
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/*++
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Routine Description:
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This routine is a callback into the miniport to set the contents of an
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entire instance of a data block.
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If the request can be completed immediately without pending,
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ScsiPortWmiPostProcess should be called from within this callback and
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FALSE returned.
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If the request cannot be completed within this callback then TRUE should
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be returned. Once the pending operations are finished the miniport should
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call ScsiPortWmiPostProcess and then complete the srb.
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Arguments:
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DeviceContext is a caller specified context value originally passed to
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ScsiPortWmiDispatchFunction.
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RequestContext is a context associated with the srb being processed.
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GuidIndex is the index into the list of guids provided when the
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miniport registered
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InstanceIndex is the index that denotes which instance of the data block
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is being set.
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BufferSize has the size of the data block passed
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Buffer has the new values for the data block
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Return Value:
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TRUE if request is pending else FALSE
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--*/
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typedef
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BOOLEAN
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(*PSCSIWMI_SET_DATAITEM) (
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IN PVOID DeviceContext,
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IN PSCSIWMI_REQUEST_CONTEXT RequestContext,
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IN ULONG GuidIndex,
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IN ULONG InstanceIndex,
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IN ULONG DataItemId,
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IN ULONG BufferSize,
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IN PUCHAR Buffer
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);
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/*++
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Routine Description:
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This routine is a callback into the miniport to set a single data item
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in a single instance of a data block.
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If the request can be completed immediately without pending,
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ScsiPortWmiPostProcess should be called from within this callback and
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FALSE returned.
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If the request cannot be completed within this callback then TRUE should
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be returned. Once the pending operations are finished the miniport should
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call ScsiPortWmiPostProcess and then complete the srb.
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Arguments:
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DeviceContext is a caller specified context value originally passed to
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ScsiPortWmiDispatchFunction.
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RequestContext is a context associated with the srb being processed.
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GuidIndex is the index into the list of guids provided when the
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miniport registered
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InstanceIndex is the index that denotes which instance of the data block
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is being set.
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DataItemId has the id of the data item being set
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BufferSize has the size of the data item passed
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Buffer has the new values for the data item
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Return Value:
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TRUE if request is pending else FALSE
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--*/
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typedef
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BOOLEAN
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(*PSCSIWMI_EXECUTE_METHOD) (
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IN PVOID DeviceContext,
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IN PSCSIWMI_REQUEST_CONTEXT RequestContext,
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IN ULONG GuidIndex,
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IN ULONG InstanceIndex,
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IN ULONG MethodId,
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IN ULONG InBufferSize,
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IN ULONG OutBufferSize,
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IN OUT PUCHAR Buffer
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);
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/*++
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Routine Description:
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This routine is a callback into the miniport to execute a method.
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If the request can be completed immediately without pending,
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ScsiPortWmiPostProcess should be called from within this callback and
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FALSE returned.
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If the request cannot be completed within this callback then TRUE should
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be returned. Once the pending operations are finished the miniport should
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call ScsiPortWmiPostProcess and then complete the srb.
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Arguments:
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Context is a caller specified context value originally passed to
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ScsiPortWmiDispatchFunction.
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RequestContext is a context associated with the srb being processed.
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GuidIndex is the index into the list of guids provided when the
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miniport registered
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InstanceIndex is the index that denotes which instance of the data block
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is being called.
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MethodId has the id of the method being called
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InBufferSize has the size of the data block passed in as the input to
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the method.
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OutBufferSize on entry has the maximum size available to write the
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returned data block. If the output buffer is not large enough
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to return all of the data blocks then the miniport should call
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ScsiPortWmiPostProcess with a status of SRB_STATUS_DATA_OVERRUN
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and the size of the output buffer needed to fufill the request.
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It is important to check that there is sufficient room in the
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output buffer before performing any operations that may have
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side effects.
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Buffer on entry has the input data block and on return has the output
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output data block.
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Return Value:
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TRUE if request is pending else FALSE
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--*/
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typedef enum
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{
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ScsiWmiEventControl, // Enable or disable an event
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ScsiWmiDataBlockControl // Enable or disable data block collection
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} SCSIWMI_ENABLE_DISABLE_CONTROL;
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typedef
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BOOLEAN
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(*PSCSIWMI_FUNCTION_CONTROL) (
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IN PVOID DeviceContext,
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IN PSCSIWMI_REQUEST_CONTEXT RequestContext,
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IN ULONG GuidIndex,
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IN SCSIWMI_ENABLE_DISABLE_CONTROL Function,
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IN BOOLEAN Enable
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);
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/*++
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Routine Description:
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This routine is a callback into the miniport to enabled or disable event
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generation or data block collection. Since WMI manages reference counting
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for each of the data blocks or events, a miniport should only expect a
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single enable followed by a single disable. Data blocks will only
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receive collection enable/disable if they were registered as requiring
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it, that is include the WMIREG_FLAG_EXPENSIVE flag.
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If the request can be completed immediately without pending,
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ScsiPortWmiPostProcess should be called from within this callback and
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FALSE returned.
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If the request cannot be completed within this callback then TRUE should
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be returned. Once the pending operations are finished the miniport should
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call ScsiPortWmiPostProcess and then complete the srb.
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Arguments:
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DeviceContext is a caller specified context value originally passed to
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ScsiPortWmiDispatchFunction.
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RequestContext is a context associated with the srb being processed.
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Function specifies which functionality is being enabled or disabled
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Enable is TRUE then the function is being enabled else disabled
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Return Value:
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TRUE if request is pending else FALSE
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--*/
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//
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// This structure supplies context information for SCSIWMILIB to process the
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// WMI srbs.
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//
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typedef struct _SCSIWMILIB_CONTEXT
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{
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//
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// WMI data block guid registration info
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ULONG GuidCount;
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PSCSIWMIGUIDREGINFO GuidList;
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//
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// WMI functionality callbacks
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PSCSIWMI_QUERY_REGINFO QueryWmiRegInfo;
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PSCSIWMI_QUERY_DATABLOCK QueryWmiDataBlock;
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PSCSIWMI_SET_DATABLOCK SetWmiDataBlock;
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PSCSIWMI_SET_DATAITEM SetWmiDataItem;
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PSCSIWMI_EXECUTE_METHOD ExecuteWmiMethod;
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||
|
|
PSCSIWMI_FUNCTION_CONTROL WmiFunctionControl;
|
||
|
|
} SCSI_WMILIB_CONTEXT, *PSCSI_WMILIB_CONTEXT;
|
||
|
|
|
||
|
|
VOID
|
||
|
|
ScsiPortWmiPostProcess(
|
||
|
|
IN PSCSIWMI_REQUEST_CONTEXT RequestContext,
|
||
|
|
IN UCHAR SrbStatus,
|
||
|
|
IN ULONG BufferUsed
|
||
|
|
);
|
||
|
|
/*++
|
||
|
|
|
||
|
|
Routine Description:
|
||
|
|
|
||
|
|
|
||
|
|
This routine will do the work of post-processing a WMI srb.
|
||
|
|
|
||
|
|
Arguments:
|
||
|
|
|
||
|
|
RequestContext is a context associated with the srb being processed. After
|
||
|
|
this api returns the ReturnStatus and ReturnSize fields are updated.
|
||
|
|
|
||
|
|
SrbStatus has the return status code for the srb. If a query or method
|
||
|
|
callback was passed an output buffer that was not large enough
|
||
|
|
then SrbStatus should be SRB_STATUS_DATA_OVERRUN and BufferUsed
|
||
|
|
should be the number of bytes needed in the output buffer.
|
||
|
|
|
||
|
|
BufferUsed has the number of bytes required by the miniport to return the
|
||
|
|
data requested in the WMI srb. If SRB_STATUS_DATA_OVERRUN was passed
|
||
|
|
in SrbStatus then BufferUsed has the number of needed in the output
|
||
|
|
buffer. If SRB_STATUS_SUCCESS is passed in SrbStatus then BufferUsed
|
||
|
|
has the actual number of bytes used in the output buffer.
|
||
|
|
|
||
|
|
Return Value:
|
||
|
|
|
||
|
|
|
||
|
|
--*/
|
||
|
|
|
||
|
|
BOOLEAN
|
||
|
|
ScsiPortWmiDispatchFunction(
|
||
|
|
IN PSCSI_WMILIB_CONTEXT WmiLibInfo,
|
||
|
|
IN UCHAR MinorFunction,
|
||
|
|
IN PVOID DeviceContext,
|
||
|
|
IN PSCSIWMI_REQUEST_CONTEXT RequestContext,
|
||
|
|
IN PVOID DataPath,
|
||
|
|
IN ULONG BufferSize,
|
||
|
|
IN PVOID Buffer
|
||
|
|
);
|
||
|
|
/*++
|
||
|
|
|
||
|
|
Routine Description:
|
||
|
|
|
||
|
|
Dispatch helper routine for WMI srb requests. Based on the Minor
|
||
|
|
function passed the WMI request is processed and this routine
|
||
|
|
invokes the appropriate callback in the WMILIB structure.
|
||
|
|
|
||
|
|
Arguments:
|
||
|
|
|
||
|
|
WmiLibInfo has the SCSI WMILIB information control block associated
|
||
|
|
with the adapter or logical unit
|
||
|
|
|
||
|
|
DeviceContext is miniport defined context value passed on to the callbacks
|
||
|
|
invoked by this api.
|
||
|
|
|
||
|
|
RequestContext is a pointer to a context structure that maintains
|
||
|
|
information about this WMI srb. This request context must remain
|
||
|
|
valid throughout the entire processing of the srb, at least until
|
||
|
|
ScsiPortWmiPostProcess returns with the final srb return status and
|
||
|
|
buffer size. If the srb can pend then memory for this buffer should
|
||
|
|
be allocated from the SRB extension. If not then the memory can be
|
||
|
|
allocated from a stack frame that does not go out of scope, perhaps
|
||
|
|
that of the caller to this api.
|
||
|
|
|
||
|
|
DataPath is value passed in wmi request
|
||
|
|
|
||
|
|
BufferSize is value passed in wmi request
|
||
|
|
|
||
|
|
Buffer is value passed in wmi request
|
||
|
|
|
||
|
|
Return Value:
|
||
|
|
|
||
|
|
TRUE if request is pending else FALSE
|
||
|
|
|
||
|
|
--*/
|
||
|
|
|
||
|
|
#define ScsiPortWmiFireAdapterEvent( \
|
||
|
|
HwDeviceExtension, \
|
||
|
|
Guid, \
|
||
|
|
InstanceIndex, \
|
||
|
|
EventDataSize, \
|
||
|
|
EventData \
|
||
|
|
) \
|
||
|
|
ScsiPortWmiFireLogicalUnitEvent(\
|
||
|
|
HwDeviceExtension, \
|
||
|
|
0xff, \
|
||
|
|
0, \
|
||
|
|
0, \
|
||
|
|
Guid, \
|
||
|
|
InstanceIndex, \
|
||
|
|
EventDataSize, \
|
||
|
|
EventData)
|
||
|
|
/*++
|
||
|
|
|
||
|
|
Routine Description:
|
||
|
|
|
||
|
|
This routine will fire a WMI event associated with an adapter using
|
||
|
|
the data buffer passed. This routine may be called at or below DPC level.
|
||
|
|
|
||
|
|
Arguments:
|
||
|
|
|
||
|
|
HwDeviceExtension is the adapter device extension
|
||
|
|
|
||
|
|
Guid is pointer to the GUID that represents the event
|
||
|
|
|
||
|
|
InstanceIndex is the index of the instance of the event
|
||
|
|
|
||
|
|
EventDataSize is the number of bytes of data that is being fired with
|
||
|
|
with the event. This size specifies the size of the event data only
|
||
|
|
and does NOT include the 0x40 bytes of preceeding padding.
|
||
|
|
|
||
|
|
EventData is the data that is fired with the events. There must be exactly
|
||
|
|
0x40 bytes of padding preceeding the event data.
|
||
|
|
|
||
|
|
Return Value:
|
||
|
|
|
||
|
|
--*/
|
||
|
|
|
||
|
|
VOID
|
||
|
|
ScsiPortWmiFireLogicalUnitEvent(
|
||
|
|
IN PVOID HwDeviceExtension,
|
||
|
|
IN UCHAR PathId,
|
||
|
|
IN UCHAR TargetId,
|
||
|
|
IN UCHAR Lun,
|
||
|
|
IN LPGUID Guid,
|
||
|
|
IN ULONG InstanceIndex,
|
||
|
|
IN ULONG EventDataSize,
|
||
|
|
IN PVOID EventData
|
||
|
|
);
|
||
|
|
/*++
|
||
|
|
|
||
|
|
Routine Description:
|
||
|
|
|
||
|
|
This routine will fire a WMI event using the data buffer passed. This
|
||
|
|
routine may be called at or below DPC level
|
||
|
|
|
||
|
|
Arguments:
|
||
|
|
|
||
|
|
HwDeviceExtension is the adapter device extension
|
||
|
|
|
||
|
|
PathId identifies the SCSI bus if a logical unit is firing the event
|
||
|
|
or is 0xff if the adapter is firing the event.
|
||
|
|
|
||
|
|
TargetId identifies the target controller or device on the bus
|
||
|
|
|
||
|
|
Lun identifies the logical unit number of the target device
|
||
|
|
|
||
|
|
Guid is pointer to the GUID that represents the event
|
||
|
|
|
||
|
|
InstanceIndex is the index of the instance of the event
|
||
|
|
|
||
|
|
EventDataSize is the number of bytes of data that is being fired with
|
||
|
|
with the event. This size specifies the size of the event data only
|
||
|
|
and does NOT include the 0x40 bytes of preceeding padding.
|
||
|
|
|
||
|
|
EventData is the data that is fired with the events. There must be exactly
|
||
|
|
0x40 bytes of padding preceeding the event data.
|
||
|
|
|
||
|
|
Return Value:
|
||
|
|
|
||
|
|
--*/
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|