The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 08, 2025
Filed:
Dec. 24, 2020
Intel Corporation, Santa Clara, CA (US);
Kaijie Guo, Shanghai, CN;
Xin Zeng, Shanghai, CN;
Ned Smith, Beaverton, OR (US);
Weigang Li, Shanghai, CN;
Junyuan Wang, Shanghai, CN;
Songwu Shen, Shanghai, CN;
Zijuan Fan, Shanghai, CN;
Yao Huo, Shanghai, CN;
Maksim Lukoshkov, Clarecastle Clare, IE;
Laurent Coquerel, Limerick, IE;
Intel Corporation, Santa Clara, CA (US);
Abstract
Techniques and mechanisms for determining an operation to be performed with a direct memory access (DMA) request. An inspection unit () is coupled between an input-output memory management unit (IOMMU) () and an endpoint device (). The inspection unit () stores a registry () comprising entries () which each correspond to a respective address, and a respective one or more resources of the endpoint device (). A given entry () of the registry () is created based on a message from the IOM MU () which indicates the successful completion of an address translation to facilitate a DMA request. The endpoint device () performs a search, based on a DMA request, to determine if any registry () entry () indicates a combination of an address and an endpoint resource, where said combination matches a corresponding combination indicated by the DMA request. Communication of the DMA request to the IOMMU () is contingent on a result of the search.