Simplified DMA mappings for self-virtualizing input/output device virtual functions
US8561066B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 8, 2010 |
| Grant date | Oct 15, 2013 |
| Priority date | — |
| Expiry date | Aug 18, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2009/45579
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Multiple translation control entries (TCEs) at the same indices in multiple, same size TCE tables are mapped to facilitate data communication between a self-virtualizing input/output (IO) resource and a logical partition. First and second TCE tables used by an adjunct partition that interfaces a self-virtualizing IO resource with a logical partition may be identically sized, so that whenever a direct memory access (DMA) operation between the self-virtualizing IO resource and the logical partition is desired the same TCE entries in the first and second TCE tables may be used to perform a redirected DMA operation, and without the need to perform hashing or other mapping algorithms to map to the respective TCE entries in the respective TCE tables.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.