DMA_RESUME_HANDLER - NtDoc
Native API online documentation, based on the System Informer
(formerly Process Hacker) phnt
headers
// netdma.h
DMA_RESUME_HANDLER DmaResumeHandler;
NTSTATUS DmaResumeHandler(
[in] PVOID ProviderChannelContext
)
{...}
View the official Windows Driver Kit DDI referenceNo description available.
Note The NetDMA interface is not supported
in Windows 8 and later.
The ProviderResumeDma function resumes the DMA transfers that are currently suspended on a DMA channel.
ProviderChannelContext [in]A pointer that identifies a DMA channel's context area. The DMA provider returned this handle to NetDMA at the location that is specified in the pProviderChannelContext parameter of the ProviderAllocateDmaChannel function.
ProviderResumeDma returns one of the following status values:
| Return code | Description |
|---|---|
| STATUS_SUCCESS | The operation completed successfully. |
| STATUS_UNSUCCESSFUL | The operation failed for unspecified reasons. |
The ProviderSuspendDma function is an optional function for NetDMA providers. The NetDMA interface calls the ProviderResumeDma function, if any, to resume DMA operations that were suspended by calling the ProviderSuspendDma function. If the DMA provider driver specifies an entry point for a ProviderSuspendDma function, it must also specify an entry point for a ProviderResumeDma function.
When the DMA engine resumes transfers, the hardware should reload the DMA descriptor that it processed last to get the new next descriptor.
NetDMA calls ProviderResumeDma at IRQL <= DISPATCH_LEVEL.