NDK_FN_INVALIDATE callback function (ndkpi.h)
The NdkInvalidate (NDK_FN_INVALIDATE) function Invalidates a fast-register NDK memory region (MR) or memory window (MW).
Syntax
NDK_FN_INVALIDATE NdkFnInvalidate;
NTSTATUS NdkFnInvalidate(
[in] NDK_QP *pNdkQp,
[in, optional] PVOID RequestContext,
[in] NDK_OBJECT_HEADER *pNdkMrOrMw,
[in] ULONG Flags
)
{...}
Parameters
[in] pNdkQp
A pointer to an NDK queue pair (QP) object (NDK_QP).
[in, optional] RequestContext
A context value to return in the RequestContext member of the NDK_RESULT structure for this request.
[in] pNdkMrOrMw
A pointer to either an memory region (MR) object (NDK_MR) or an memory (MW) object (NDK_MW) that is specified in an NDK_OBJECT_HEADER structure. If an MR object is specified, the MR object must have been registered with the NdkFastRegister (NDK_FN_FAST_REGISTER) function. The NDK consumer must never specify an MR object that was registered with the NdkRegister (NDK_FN_REGISTER) function in the pNdkMrOrMw parameter. Access to MR objects registered with the NdkRegister (NDK_FN_REGISTER)) function can be removed with the NdkDeregisterMr (NDK_FN_DEREGISTER_MR) function.
[in] Flags
A bitwise OR of flags which specifies the operations that are allowed. The following flags are supported:
| Value | Meaning |
|---|---|
|
Indicates the successful completion of this request does not generate a completion event in the outbound completion queue. However, requests that fail do generate an event in the completion queue. |
|
Indicates that all prior read requests must be complete before the hardware begins processing this request. |
|
Indicates to the NDK provider that it may defer indicating the request to hardware for processing. For more information about this flag, see NDKPI Deferred Processing Scheme.
Note This flag is supported only in NDKPI 1.2 (Windows Server 2012 R2) and later. |
Return value
The
NdkInvalidate function returns one of the following NTSTATUS codes.
| Return code | Description |
|---|---|
|
The request was posted successfully. A completion entry will be queued to the CQ when the work request is completed. |
|
The QP is not connected. |
|
An error occurred. |
Remarks
NdkInvalidate invalidates an NDK fast-register MR or MW.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | None supported,Supported in NDIS 6.30 and later. |
| Minimum supported server | Windows Server 2012 |
| Target Platform | Windows |
| Header | ndkpi.h (include Ndkpi.h) |
| IRQL | <=DISPATCH_LEVEL |
See also
NDKPI Completion Handling Requirements
NDKPI Deferred Processing Scheme