Splitting endpoint address translation cache management responsibilities between a device driver and device driver services
US7617377B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 17, 2006 |
| Grant date | Nov 10, 2009 |
| Priority date | — |
| Expiry date | Sep 22, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F12/145
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Mechanisms for splitting responsibilities for communicating with an endpoint between a device driver and device driver services are provided. With these mechanisms, the device driver is responsible for managing queues for communicating requests between applications in a logical partition and the endpoint. The device driver further invokes memory management via device driver services. The device driver services are responsible for managing memory accessible by the endpoint, including the address translation and protection table (ATPT) or a root complex and the address translation caches (ATCs) of the endpoint. The device driver services may associate untranslated addresses for data structures used to communicate between a system image and the endpoint. The endpoint may request translations of the untranslated addresses and may cache the translations in the ATCs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.