NdisMoveToMappedMemory

This function copies data from a system-space buffer to device memory that was mapped during initialization with the NdisMMapIoSpace function.

At a Glance

Header file:	Ndis.h
Windows CE versions:	2.0 and later

Syntax

VOID NdisMoveToMappedMemory( OUT PVOID Destination,
IN PVOID Source, IN ULONG Length );

Parameters

Destination: Specifies the base virtual address within a mapped device memory range where the copy should begin. This address must fall at least Length bytes from the end of the mapped range.
Source: Pointer to a system-space buffer from which this function copies data to the destination range. This buffer must be at least Length bytes in size.
Length: Specifies the number of bytes to copy.

Remarks

An NIC driver calls this function to copy data from a buffer in the host to mapped device memory, as, for example, when transferring data from a protocol-supplied buffer or miniport-allocated staging buffer to the NIC for a transmit.

Both the Source and Destination pointers are virtual addresses. The virtual range specified by Destination and Length must fall within a range that was mapped with the NdisMMapIoSpace function.

A driver that calls this function can run at any IRQL when the given Source and Destination are resident. Otherwise, callers must be running at IRQL < DISPATCH_LEVEL, as, for example if the Source address is on the stack.