Linear Memory-Space Segments
A linear memory-space segment is the classical type of segment that display hardware uses. The linear memory-space segment conforms to the following model:
It virtualizes video memory located on the graphics adapter.
The GPU accesses it directly; that is, without redirection through page mapping.
It's managed linearly in a one-dimensional address space.
The driver sets the Flags member of the DXGK_SEGMENTDESCRIPTOR structure to 0 to specify a linear memory-space segment. However, the driver can set the following bit-field flags to indicate other segment support:
CpuVisible to indicate that the segment is CPU-accessible.
UseBanking to indicate that the segment is divided into banks.
The following figure shows a visual representation of a linear memory-space segment.