Determining extended capability of a channel path
First Claim
1. A computer program product for determining extended capability of a channel path in an input/output (I/O) processing system, the computer program product comprising:
- a non-transitory tangible storage medium readable by a processing circuit and storing instructions for execution by the processing circuit for performing a method comprising;
receiving a request at a channel subsystem in a host computer system from an operating system in the host computer system to provide a channel path description for a channel path between the channel subsystem and an I/O device, the channel subsystem including a channel configured to be coupled to a control unit via the channel path, the channel configured to control information transfer between the channel subsystem and the I/O device; and
outputting a channel path description block from the channel subsystem to the operating system in response to the request, the channel path description block including channel path identification and description information, the channel path description block specifying whether the channel path supports a Fibre Channel protocol for commanding an I/O operation, the channel path description block specifying whether the channel path supports an extension to the Fibre Channel protocol based on the channel path supporting the Fibre Channel protocol.
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Accused Products
Abstract
A computer program product includes a tangible storage storing instructions for performing a method. The method includes: receiving a request at a channel subsystem in a host computer system to provide a channel path description for a channel path, the channel subsystem including a channel configured to be coupled to a control unit via the channel path, the channel configured to control information transfer over the channel path; and outputting a channel path description block from the channel subsystem to the operating system in response to the request, the channel path description block including channel path identification and description information, the channel path description block specifying whether the channel path supports a Fiber Channel protocol for commanding an I/O operation, the channel path description block specifying whether the channel path supports an extension to the Fiber Channel protocol based on the channel path supporting the Fiber Channel protocol.
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Citations
20 Claims
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1. A computer program product for determining extended capability of a channel path in an input/output (I/O) processing system, the computer program product comprising:
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a non-transitory tangible storage medium readable by a processing circuit and storing instructions for execution by the processing circuit for performing a method comprising; receiving a request at a channel subsystem in a host computer system from an operating system in the host computer system to provide a channel path description for a channel path between the channel subsystem and an I/O device, the channel subsystem including a channel configured to be coupled to a control unit via the channel path, the channel configured to control information transfer between the channel subsystem and the I/O device; and outputting a channel path description block from the channel subsystem to the operating system in response to the request, the channel path description block including channel path identification and description information, the channel path description block specifying whether the channel path supports a Fibre Channel protocol for commanding an I/O operation, the channel path description block specifying whether the channel path supports an extension to the Fibre Channel protocol based on the channel path supporting the Fibre Channel protocol. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus for determining extended capability of a channel path in an input/output (I/O) processing system, the apparatus comprising:
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a channel subsystem in a host computer system for communication with a control unit via a channel path, the channel subsystem including a channel configured to be coupled to a control unit via the channel path, the channel configured to control information transfer between the channel subsystem and an I/O device, the channel subsystem configured to perform a method comprising; receiving a request at the channel subsystem from an operating system in the host computer system to provide a channel path description for the channel path; and outputting a channel path description block from the channel subsystem to the operating system in response to the request, the channel path description block including channel path identification and description information, the channel path description block specifying whether the channel path supports a Fibre Channel protocol for commanding an I/O operation, the channel path description block specifying whether the channel path supports an extension to the Fibre Channel protocol based on the channel path supporting the Fibre Channel protocol. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A method for determining extended capability of a channel path in an input/output (I/O) processing system, the method comprising:
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receiving a request at a channel subsystem in a host computer system from an operating system in the host computer system to provide a channel path description for a channel path, the channel subsystem including a channel configured to be coupled to a control unit via the channel path, the control unit configured to operate and control one or more I/O devices, the channel configured to control information transfer between the channel subsystem and the one or more I/O devices; and outputting a channel path description block from the channel subsystem to the operating system in response to the request, the channel path description block including channel path identification and description information, the channel path description block specifying whether the channel path supports a Fibre Channel protocol for commanding an I/O operation, the channel path description block specifying whether the channel path supports an extension to the Fibre Channel protocol based on the channel path supporting the Fibre Channel protocol. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification