Method for communicating with an I/O adapter using cached address translations
US7506084B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 17, 2006 |
| Grant date | Mar 17, 2009 |
| Priority date | — |
| Expiry date | Mar 15, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/683
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for communicating with an input/output (I/O) adapter configured to communicate with a locally attached I/O device are provided using cached address translations. With the method, in response to receiving a storage transaction request, a queue element is created in a command queue specifying an untranslated buffer address. The queue element may be retrieved by the I/O adapter and a determination may be made as to whether the queue element contains a read operation command. If so, a translation request may be sent from the I/O adapter to a root complex at substantially a same time as the read operation command is sent to a locally attached external I/O device. The translated address corresponding to the untranslated address of the queue element may be returned and stored in the I/O adapter prior to receiving the data read from the external I/O device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.