DMA_ABORT_HANDLER - NtDoc
Native API online documentation, based on the System Informer
(formerly Process Hacker) phnt
headers
// netdma.h
DMA_ABORT_HANDLER DmaAbortHandler;
NTSTATUS DmaAbortHandler(
[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 ProviderAbortDma function cancels any DMA transfers that are associated with 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.
ProviderAbortDma 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 ProviderAbortDma function is an optional function for NetDMA providers. The NetDMA interface can call a DMA provider driver's ProviderAbortDma function, if any, to abort all DMA transfers that have been scheduled on a DMA channel.
In ProviderAbortDma, the DMA provider should terminate the transfer immediately without completing the transfer of the data that is associated with the current DMA descriptor. If completion status reporting is enabled, the DMA engine writes the NetDmaTransferStatusHalted status in the address that is specified in the CompletionVirtualAddress and CompletionPhysicalAddress members in the NET_DMA_CHANNEL_PARAMETERS structure.
After the abort operation completes, the DMA channel must be ready for the NetDMA interface to call the ProviderStartDma function. The NetDMA interface will not call the ProviderAppendDma function until after the transfer is restarted.
NetDMA calls ProviderAbortDma at IRQL <= DISPATCH_LEVEL.