D3DKMTMapGpuVirtualAddress function (d3dkmthk.h)

D3DKMTMapGpuVirtualAddress maps a GPU virtual address range to a specific allocation range or puts it to the Invalid or Zero state.

Syntax

NTSTATUS D3DKMTMapGpuVirtualAddress(
  D3DDDI_MAPGPUVIRTUALADDRESS *unnamedParam1
);

Parameters

unnamedParam1

[in/out] pData is a pointer to a D3DDDI_MAPGPUVIRTUALADDRESS structure that describes the operation.

Return value

This function might also return other NTSTATUS values.

Remarks

The driver can specify a base GPU virtual address (VA) to map or let the video memory manager automatically pick one. When specifying a non-NULL BaseAddress value, the entire range from BaseAddress to BaseAddress+Size must be in a freed state or belong to a VA range that was obtained by calling D3DKMTMapGpuVirtualAddress or DxgkCbReserveGpuVirtualAddressRange. When Protection.Zero or Protection.NoAccess is specified, the VA range can't belong to a range that was obtained by calling MapGpuVirtualAddressCb.

The driver can specify whether the mapping should allow for write and execute privileges in addition to read privileges, which always exist by default.

In the linked display adapter (LDA) configuration, the paging queue defines a physical GPU whose page tables are modified, and the allocation handle (if not NULL) defines where the page table entries are pointing to. The allocation can be resident in any physical GPU memory segment.

The GPU VA range, which is allocated by the API, is freed when the allocation (the GPU VA is mapped to) is destroyed. The VA range can also be freed by calling D3DKMTFreeGpuVirtualAddress, but this needs to be synchronized with allocation destruction if necessary.

Requirements

See also

DxgkCbReserveGpuVirtualAddressRange