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===============
AMDGPU Glossary
===============
Here you can find some generic acronyms used in the amdgpu driver. Notice that
we have a dedicated glossary for Display Core at
'Documentation/gpu/amdgpu/display/dc-glossary.rst'.
.. glossary::
active_cu_number
The number of CUs that are active on the system. The number of active
CUs may be less than SE * SH * CU depending on the board configuration.
CP
Command Processor
CPLIB
Content Protection Library
CU
Compute Unit
DFS
Digital Frequency Synthesizer
ECP
Enhanced Content Protection
EOP
End Of Pipe/Pipeline
GART
Graphics Address Remapping Table. This is the name we use for the GPUVM
page table used by the GPU kernel driver. It remaps system resources
(memory or MMIO space) into the GPU's address space so the GPU can access
them. The name GART harkens back to the days of AGP when the platform
provided an MMU that the GPU could use to get a contiguous view of
scattered pages for DMA. The MMU has since moved on to the GPU, but the
name stuck.
GC
Graphics and Compute
GMC
Graphic Memory Controller
GPUVM
GPU Virtual Memory. This is the GPU's MMU. The GPU supports multiple
virtual address spaces that can be in flight at any given time. These
allow the GPU to remap VRAM and system resources into GPU virtual address
spaces for use by the GPU kernel driver and applications using the GPU.
These provide memory protection for different applications using the GPU.
GTT
Graphics Translation Tables. This is a memory pool managed through TTM
which provides access to system resources (memory or MMIO space) for
use by the GPU. These addresses can be mapped into the "GART" GPUVM page
table for use by the kernel driver or into per process GPUVM page tables
for application usage.
IH
Interrupt Handler
HQD
Hardware Queue Descriptor
IB
Indirect Buffer
IP
Intellectual Property blocks
KCQ
Kernel Compute Queue
KGQ
Kernel Graphics Queue
KIQ
Kernel Interface Queue
MEC
MicroEngine Compute
MES
MicroEngine Scheduler
MMHUB
Multi-Media HUB
MQD
Memory Queue Descriptor
PPLib
PowerPlay Library - PowerPlay is the power management component.
PSP
Platform Security Processor
RLC
RunList Controller
SDMA
System DMA
SE
Shader Engine
SH
SHader array
SMU
System Management Unit
SS
Spread Spectrum
VCE
Video Compression Engine
VCN
Video Codec Next
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