公开(公告)号：US09672178B1

公开(公告)日：2017-06-06

申请号：US14687700

申请日：2015-04-15

Applicant: BiTMICRO Networks, Inc.

Inventor： Cyrill C. Ponce ,  Marizonne O. Fuentes ,  Gianico G. Noble

IPC: G06F3/00 ,  G06F13/00 ,  G06F13/37 ,  G06F13/28

CPC classification number: G06F13/37 ,  G06F3/061 ,  G06F3/0656 ,  G06F3/0683 ,  G06F13/28 ,  G06F13/287

Abstract: In an embodiment of the invention, a method comprises: A method, comprising: issuing, by a Direct Memory Access (DMA) engine, an update request to a dependency table if the DMA engine has finished executing a first descriptor; and issuing, by the DMA engine, a monitoring request if the DMA engine is executing a second descriptor that depends on a completion of a data transfer so that the DMA engine can monitor a status of a selected subindex related to the data transfer, wherein the subindex is in the dependency table. In another embodiment of the invention, an apparatus comprises: a Direct Memory Access (DMA) engine configured to issue an update request to a dependency table if the DMA engine has finished executing a first descriptor, and configured to issue a monitoring request if the DMA engine is executing a second descriptor that depends on a completion of a data transfer so that the DMA engine can monitor a status of a selected subindex related to the data transfer, wherein the subindex is in the dependency table.