Isolation of input/output adapter error domains
AssigneeInternational Business Machines Corporation
InventorsRichard Louis Arndt, Patrick Allen Buckland, Gregory Michael Nordstrom, Steven Mark Thurber
Life of this patent
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Abstract
Method, apparatus and system for isolating input/output adapter error domains in a data processing system. Errors occurring in one input/output adapter are isolated from other input/output adapters of the data processing system by functionality in a host bridge that connects the input/output adapters to a system bus of the data processing system, thus permitting the use of low cost, industry standard switches and bridges external to the host bridge.
Claims3
A method for isolating an error in one input/output unit of a plurality of input/output units of a data processing system from other components of the data processing system, the method comprising:
- isolating the error in the one input/output unit in a host bridge to which the plurality of input/output units are connected without a bridge chip located external of the host bridge for isolating errors in the plurality of input/output units from other components of the data processing system, wherein the host bridge includes a table having a plurality of entries, each of the plurality of entries is capable of being assigned to a different input/output unit, wherein each of the plurality of input/output units has an identifier, and wherein the host bridge includes functionality for isolating errors in the one input/output unit from other components of the data processing system by using the identifier and the table.
Dependencies are inferred from the claim text.