Method for handling small computer system interface (SCSI)...

Details Method for handling small computer system interface (SCSI)... Method for handling small computer system interface (SCSI)...

2008-07-02

2011-10-18

Chen, Alan (Department: 2182)

Electrical computers and digital data processing systems: input/

Input/output data processing

Direct memory accessing

C719S321000, C719S326000, C710S026000, C711S100000

Reexamination Certificate

active

08041849

ABSTRACT:
The present invention is a method for handling an operation system kernel-provided command via a software-based device driver. The method includes receiving the operation system kernel-provided command from an operation system kernel. The method further includes determining if a kernel virtual address is required for responding to the command. The method further includes initiating a Direct Memory Access (DMA) operation for providing data to the operating system kernel in response to the command when a kernel virtual address is not required for responding to the command. The method further includes allocating a device driver buffer with a DMA address and a virtual address when a kernel virtual address is required for responding to the command.

REFERENCES:
patent: 2008/0091915 (2008-04-01), Moertl et al.

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