发明名称 |
Providing indirect data addressing for a control block at a channel subsystem of an I/O processing system |
摘要 |
An computer program product, apparatus, and method for facilitating input/output (I/O) processing for an I/O operation at a host computer system configured for communication with a control unit. The computer program product includes a tangible storage medium readable by a processing circuit and storing instructions for execution by the processing circuit for performing a method. The method includes the host computer system obtaining a transport command word (TCW) for an I/O operation. The TCW specifies a location of one or more I/O commands and a flag. The flag is set to indicate that the location is an indirect address. The host computer system extracts the location of the one or more I/O commands and the flag from the TCW. The host computer system gathers the one or more I/O commands responsive to the location specified by the TCW and the flag, and then forwards the one or more I/O commands to the control unit for execution.
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申请公布号 |
US8117347(B2) |
申请公布日期 |
2012.02.14 |
申请号 |
US20080031201 |
申请日期 |
2008.02.14 |
申请人 |
FLANAGAN JOHN R.;CASPER DANIEL F.;KALOS MATTHEW J.;RIEDY DALE F.;SITTMANN GUSTAV E.;NJOKU UGOCHUKWU C.;HUANG CATHERINE C.;INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
FLANAGAN JOHN R.;CASPER DANIEL F.;KALOS MATTHEW J.;RIEDY DALE F.;SITTMANN GUSTAV E.;NJOKU UGOCHUKWU C.;HUANG CATHERINE C. |
分类号 |
G06F3/00 |
主分类号 |
G06F3/00 |
代理机构 |
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代理人 |
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地址 |
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