1=============== 2AMDGPU Glossary 3=============== 4 5Here you can find some generic acronyms used in the amdgpu driver. Notice that 6we have a dedicated glossary for Display Core at 7'Documentation/gpu/amdgpu/display/dc-glossary.rst'. 8 9.. glossary:: 10 11 active_cu_number 12 The number of CUs that are active on the system. The number of active 13 CUs may be less than SE * SH * CU depending on the board configuration. 14 15 CP 16 Command Processor 17 18 CPLIB 19 Content Protection Library 20 21 CU 22 Compute Unit 23 24 DFS 25 Digital Frequency Synthesizer 26 27 ECP 28 Enhanced Content Protection 29 30 EOP 31 End Of Pipe/Pipeline 32 33 GART 34 Graphics Address Remapping Table. This is the name we use for the GPUVM 35 page table used by the GPU kernel driver. It remaps system resources 36 (memory or MMIO space) into the GPU's address space so the GPU can access 37 them. The name GART harkens back to the days of AGP when the platform 38 provided an MMU that the GPU could use to get a contiguous view of 39 scattered pages for DMA. The MMU has since moved on to the GPU, but the 40 name stuck. 41 42 GC 43 Graphics and Compute 44 45 GMC 46 Graphic Memory Controller 47 48 GPUVM 49 GPU Virtual Memory. This is the GPU's MMU. The GPU supports multiple 50 virtual address spaces that can be in flight at any given time. These 51 allow the GPU to remap VRAM and system resources into GPU virtual address 52 spaces for use by the GPU kernel driver and applications using the GPU. 53 These provide memory protection for different applications using the GPU. 54 55 GTT 56 Graphics Translation Tables. This is a memory pool managed through TTM 57 which provides access to system resources (memory or MMIO space) for 58 use by the GPU. These addresses can be mapped into the "GART" GPUVM page 59 table for use by the kernel driver or into per process GPUVM page tables 60 for application usage. 61 62 IH 63 Interrupt Handler 64 65 HQD 66 Hardware Queue Descriptor 67 68 IB 69 Indirect Buffer 70 71 IP 72 Intellectual Property blocks 73 74 KCQ 75 Kernel Compute Queue 76 77 KGQ 78 Kernel Graphics Queue 79 80 KIQ 81 Kernel Interface Queue 82 83 MEC 84 MicroEngine Compute 85 86 MES 87 MicroEngine Scheduler 88 89 MMHUB 90 Multi-Media HUB 91 92 MQD 93 Memory Queue Descriptor 94 95 PPLib 96 PowerPlay Library - PowerPlay is the power management component. 97 98 PSP 99 Platform Security Processor 100 101 RLC 102 RunList Controller 103 104 SDMA 105 System DMA 106 107 SE 108 Shader Engine 109 110 SH 111 SHader array 112 113 SMU 114 System Management Unit 115 116 SS 117 Spread Spectrum 118 119 VCE 120 Video Compression Engine 121 122 VCN 123 Video Codec Next 124