NdisMGetDmaAlignment - NtDoc
Native API online documentation, based on the System Informer
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headers
// ndis.h
ULONG NdisMGetDmaAlignment(
[in] NDIS_HANDLE MiniportAdapterHandle
);
View the official Windows Driver Kit DDI referenceNo description available.
The NdisMGetDmaAlignment function returns the alignment requirements of the DMA system for a NIC.
MiniportAdapterHandle [in]An NDIS handle that identifies the miniport adapter for the NIC. This handle was originally passed to the MiniportInitializeEx function.
Returns a value that specifies the alignment requirements of the DMA system. The miniport driver uses this value to round up the size of a receive buffer to a cache-line size or a multiple of that size when it allocates such a buffer.
Note A miniport driver must have already called NdisMRegisterScatterGatherDma or NdisMRegisterDmaChannel to initialize a scatter/gather DMA channel before calling NdisMGetDmaAlignment.
A miniport driver can call the NdisMGetDmaAlignment function to determine alignment requirements for DMA buffers that it allocates. A miniport driver might require increasing the returned value because of additional hardware device restrictions.