Ensuring deadlock free operation for peer to peer traffic in an input/output memory management unit (IOMMU)
US7480784B2 · kind B2 · utility
7Cited by
16References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 11, 2006 |
| Grant date | Jan 20, 2009 |
| Priority date | — |
| Expiry date | Apr 7, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F12/145
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In one embodiment, an input/output memory management unit (IOMMU) comprises a cache to cache translation data from memory; and a control unit coupled to the cache. The control unit is configured to implement address translation and memory protection for memory requests sourced by one or more input/output (I/O) devices. The memory requests sourced by the I/O devices travel in one or more first virtual channels, and the control unit is configured to transmit memory requests sourced by the control unit in at least a second virtual channel separate from the first virtual channels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.