System for dynamically configuring I/O device adapters where a f

Details System for dynamically configuring I/O device adapters where a f System for dynamically configuring I/O device adapters where a f

1997-12-19

2000-02-08

Lee, Thomas C.

Electrical computers and digital data processing systems: input/

Input/output data processing

Peripheral configuration

710 8, 710 19, 710129, G06F 1310

Patent

active

060237368

ABSTRACT:
An apparatus, system and method permitting dynamic configuration of I/O device adapters connected to a bus utilizes a function configuration register to store a READY/NOT READY status for each of the I/O device adapters. Upon the occurrence of a reset condition, dynamic configuration decision logic detects which I/O device adapters are connected to the bus, determines configuration parameters for each connected I/O device adapter, initializes the configuration space for each connected I/O device adapter, and then sets a corresponding flag in the function configuration register to indicate ready status. An I/O device driver interrupts a configuration process to examine the function configuration register. If ready status can be confirmed from this function configuration register within a time out period, then the configuration process may proceed; otherwise, a device error recovery process is initiated.

REFERENCES:
patent: 5751975 (1998-05-01), Gillespie et al.
patent: 5793997 (1998-08-01), Briggs
patent: 5832238 (1998-11-01), Helms
patent: 5857083 (1999-01-01), Venkat
patent: 5889965 (1999-03-01), Wallach et al.
IBM Technical Disclosure Bulletin, vol. 39, No. 01, Jan. 1996, pp. 339-351, "Method for Atomic Peer-to-Peer Communication on a Peripheral Component Interconnect Bus" by B. E. Bakke et al.
IBM Patent Application, Docket RO997-193, Serial No. 08/995,075, filed Dec. 19, 1997, "Enhanced Reset and Built-In Self-Test Mechanisms for Single Function and Multifunction Input/Output Devices".

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