Bus specific device enumeration system and method

Details Bus specific device enumeration system and method Bus specific device enumeration system and method

2007-04-10

2007-04-10

An, Meng-Al T. (Department: 2194)

Electrical computers and digital data processing systems: input/

Input/output data processing

Peripheral monitoring

C719S319000, C719S327000

Reexamination Certificate

active

10449302

ABSTRACT:
A kernel device file system publication system for dynamically enumerating and configuring an instance of a device in the kernel device tree upon request by a user level application. The kernel device file system logically arranges system level devices in a hierarchical tree-like topology defining devices as nodes of a device tree to allow for a top-down access. The top-down access allows devices connecting to the computer system to be configured based on the physical path of the device. This process starts at a bus nexus and drives device configuration down the device tree. The bus configuration interfaces permit each nexus in the device tree hierarchy to participate in the device lookup and readdirs operations performed by the device file system. The device file system path operations are performed as an iterative sequence of bus configure operations, whereby each nexus controls the enumeration and configuration of that nexus' children.

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