Patent ID: 9672178
Date: 2017-06-06
CPC Classifications: G06F

Claim:
1. 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 selected subindex is in the dependency table; wherein the dependency table is coupled to the DMA engine by a request channel and a monitoring channel; wherein the dependency table is coupled to a processor by an access channel; and wherein the dependency table, request channel, monitoring channel, and access channel provide a hardware-based data transfer completion notification mechanism between the processor and the DMA engine so that the processor is not rendered as a bottleneck in a system.