Dmi Link Down; Processor Graphics Controller (Gt); Processor Graphics Controller Unit Block Diagram - Intel BX80623I32100 Datasheet

2.3.3

DMI Link Down

The DMI link going down is a fatal, unrecoverable error. If the DMI data link goes to
data link down, after the link was up, then the DMI link hangs the system by not
allowing the link to retrain to prevent data corruption. This link behavior is controlled
by the PCH.
Downstream transactions that had been successfully transmitted across the link prior
to the link going down may be processed as normal. No completions from downstream,
non-posted transactions are returned upstream over the DMI link after a link down
event.
2.4

Processor Graphics Controller (GT)

New Graphics Engine Architecture includes 3D compute elements, Multi-format
hardware-assisted decode/encode Pipeline, and Mid-Level Cache (MLC) for superior
high definition playback, video quality, and improved 3D performance and Media.
Display Engine in the Uncore handles delivering the pixels to the screen. GSA (Graphics
in System Agent) is the primary Channel interface for display memory accesses and
"PCI-like" traffic in and out.
Figure 2-6.

Processor Graphics Controller Unit Block Diagram

28
Setup/Rasterize
Vertex
Hierachical Z
Fetch
Hardware Clipper
Unified Execution Unit Array
EU
EU
Additional Post Processing
Multi-Format Decode/Encode
Full MPEG2, VC1, AVC Decode
Fixed Function Post Processing
Full AVC Encode
Partial MPEG2, VC1 Encode
VS/GS
EU
EU
Interfaces
Texture
Unit
Pixel
Backend
Datasheet, Volume 1