Fibre channel input/output data routing system and method
First Claim
1. A computer program product for performing an input/output (I/O) processing operation at a host computer system configured for communication with a control unit, 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;
obtaining information relating to an I/O operation at a channel subsystem in the host computer system, the channel subsystem including at least one channel having a channel processor and a local channel memory;
generating addressing information and forwarding the addressing information from the at least one channel to a network interface between the channel subsystem and at least one I/O device, the addressing information specifying a location in the local channel memory;
forwarding an I/O command message to the at least one I/O device via the network interface;
responsive to the I/O command message, receiving a data transfer request from the network interface that includes the addressing information;
responsive to receiving the data transfer request, accessing one of a plurality of address control words (ACWs), each ACW specifying an address of a location in a host computer memory; and
routing the data transfer request to the host memory location specified in the ACW.
1 Assignment
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Accused Products
Abstract
On embodiment includes a computer program product for performing a method including: obtaining information relating to an I/O operation at a channel subsystem in a host computer system; generating addressing information and forwarding the addressing information from at least one channel to a network interface between the channel subsystem and at least one I/O device, the addressing information specifying a location in a local channel memory; forwarding an I/O command message to the at least one I/O device via the network interface; responsive to the I/O command message, receiving a data transfer request from the network interface that includes the addressing information; responsive to receiving the data transfer request, accessing one of a plurality of address control words (ACWs), each ACW specifying an address of a location in a host computer memory; and routing the data transfer request to the host memory location specified in the ACW.
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Citations
15 Claims
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1. A computer program product for performing an input/output (I/O) processing operation at a host computer system configured for communication with a control unit, 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; obtaining information relating to an I/O operation at a channel subsystem in the host computer system, the channel subsystem including at least one channel having a channel processor and a local channel memory; generating addressing information and forwarding the addressing information from the at least one channel to a network interface between the channel subsystem and at least one I/O device, the addressing information specifying a location in the local channel memory; forwarding an I/O command message to the at least one I/O device via the network interface; responsive to the I/O command message, receiving a data transfer request from the network interface that includes the addressing information; responsive to receiving the data transfer request, accessing one of a plurality of address control words (ACWs), each ACW specifying an address of a location in a host computer memory; and routing the data transfer request to the host memory location specified in the ACW. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus for performing an input/output (I/O) processing operation at a host computer system configured for communication with a control unit, the host computer system including a channel subsystem, the channel subsystem configured to communicate with the control unit via a network interface, the channel subsystem configured to perform:
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obtaining information relating to an I/O operation at the channel subsystem, the channel subsystem including at least one channel having a channel processor and a local channel memory; generating addressing information and forwarding the addressing information from the at least one channel to the network interface between the channel subsystem and at least one I/O device, the addressing information specifying a location in the local channel memory; forwarding an I/O command message to the at least one I/O device via the network interface; responsive to the I/O command message, receiving a data transfer request from the network interface that includes the addressing information; responsive to receiving the data transfer request, accessing one of a plurality of address control words (ACWs), each ACW specifying an address of a location in a host computer memory; and routing the data transfer request to the host memory location specified in the ACW. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification