Method and system for structured DMA transactions

Details Method and system for structured DMA transactions Method and system for structured DMA transactions

2004-11-10

2011-12-13

Truong, Lechi (Department: 2194)

Electrical computers and digital processing systems: interprogra

Miscellaneous

C710S022000, C710S308000

Reexamination Certificate

active

08079036

ABSTRACT:
Disclosed is a structured model for developing DMA code and for performing DMA transactions. This model of structured DMA transactions provides a framework with default behaviors. Developers need only provide a minimal amount of configuration information and can then characterize subsequent DMA transactions in terms of a profile, thus reducing the amount of detailed and often redundant information that developers need to provide for each DMA transaction. In some embodiments, the DMA transaction model is expressed in terms of object-oriented programming constructs. In one example, a DMA enabler object captures general DMA operational parameters and manages underlying operating system objects and behavior. When device manager software receives an input/output request that involves a DMA data transfer, the device manager constructs a DMA transaction object that represents the DMA work request. During the processing of the DMA transaction, the DMA transaction object maintains state and status information.

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