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, 2008
Filed:
Sep. 23, 2003
Matthew J. Craighead, Santa Clara, CA (US);
Matthew J. Craighead, Santa Clara, CA (US);
Nvidia Corporation, Santa Clara, CA (US);
Abstract
Transferring data between a requesting program and a hardware device. An program requests a pre-allocation of non-pageable memory. The program requests a transfer via a direct memory access (DMA) from the hardware device into the non-pageable memory. The requesting program is notified when the DMA is complete. The requesting program reads the data from the non-pageable memory. A determination may be made whether a range of addresses specified in the DMA request is within the pre-allocated range of non-pageable memory. If the range of addresses is within the pre-allocated non-pageable memory, the data transfer involves fewer transfers between system memory and the CPU than if the range of addresses is outside the pre-allocated non-pageable memory.