System and method for DMA transfer of data in scatter/gather mode
US7249202B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 26, 2004 |
| Grant date | Jul 24, 2007 |
| Priority date | — |
| Expiry date | Dec 12, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2207/3828
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and system for DMA transfer of data in scatter/gather mode. A table of buffer descriptors may be used to determine the next buffer to be used when a current buffer storing data that has been transferred or will be transferred and may be used in automatic buffer switching, which does not require processor intervention. Entries in the table of buffer descriptors are entered programmatically. The method and system also provide for hardware writing to table of packet descriptors which describes location and size of incoming data and can indicate whether a packet of data straddles two or more buffers, thus decoupling packet sizes from buffer sizes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.