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:
Aug. 18, 2009
Filed:
Sep. 08, 2004
Bradley S. Sonksen, Rancho Santa Margarita, CA (US);
Kuangfu D. Chu, Irvine, CA (US);
Rajendra R. Gandhi, Laguna Niguel, CA (US);
Bradley S. Sonksen, Rancho Santa Margarita, CA (US);
Kuangfu D. Chu, Irvine, CA (US);
Rajendra R. Gandhi, Laguna Niguel, CA (US);
QLOGIC, Corporation, Aliso Viejo, CA (US);
Abstract
A host bus adapter coupled to a network and a host computing system is provided. The host bus adapter includes a direct memory access ('DMA')mode detection module that receives a DMA channel identifier information from an arbitration module that receives requests from plural DMA channels, wherein the DMA mode detection module includes a DMA counter that counts a number of times a single DMA channel is exclusively serviced by the arbitration module and if the DMA counter value is equal to a threshold value, then the DMA mode detection module enables a single channel mode during which standard transaction rules are ignored for determining DMA request lengths for transferring data. The single channel mode is enabled for a certain duration. The host bus adapter includes a rule based segmentation logic that may be enabled and/or disabled by host bus adapter firmware and/or detection of a single channel mode condition.