Multi-channel DMA system with command queue structure supporting three DMA modes
US10241946B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 18, 2017 |
| Grant date | Mar 26, 2019 |
| Priority date | — |
| Expiry date | Aug 3, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/1673
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method, system, and apparatus are provided for managing multiple DMA channels in different DMA modes by processing command sequences associated with different virtual DMA channels and stored in a command queue structure, such that a first command sequence is processed to directly configure one or more first register descriptors at a context store to implement a direct configuration DMA mode for a first virtual channel, a second command sequence is processed to initiate a fetch of a linked list descriptor chain for loading one or more second register descriptors at a second DMA channel context store register to implement a link list configuration DMA mode for a second virtual channel, and a third command sequence is processed to retrieve an instruction program for loading into the command queue structure and execution by the DMA controller to implement a program configuration DMA mode for a third virtual channel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.