Preserving data integrity of DMA descriptors

Details Preserving data integrity of DMA descriptors Preserving data integrity of DMA descriptors

2011-04-05

2011-04-05

Chen, Alan (Department: 2182)

Electrical computers and digital data processing systems: input/

Input/output data processing

Direct memory accessing

C710S023000, C710S027000, C710S028000, C714S100000, C714S758000

Reexamination Certificate

active

07921237

ABSTRACT:
A storage system includes a host computer coupled to a device to transfer a DMA descriptor between the host and the device. An integrity manager manages the integrity of the DMA descriptor between the host computer and the device. The integrity manager embeds a host-side DMA descriptor integrity value in the DMA descriptor and the device transfers the DMA descriptor to a device memory. The device generates a device-side DMA descriptor integrity value and compares it to the host-side DMA descriptor integrity value to determine if the descriptor is corrupted.

REFERENCES:
patent: 6105160 (2000-08-01), Fukumoto et al.
patent: 2005/0289253 (2005-12-01), Edirisooriya et al.
patent: 2008/0040519 (2008-02-01), Starr et al.

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