Message transport mechanisms and methods

Details Message transport mechanisms and methods Message transport mechanisms and methods

1997-10-15

1999-11-09

Lee, Thomas C.

Electrical computers and digital data processing systems: input/

Input/output data processing

Input/output data buffering

710 52, 709301, 711154, 711203, G06F 1310, G06F 1314

Patent

active

059832924

ABSTRACT:
An I/O system including a processor complex and system main memory connected to I/O adapters via I/O adapters and I/O bus. A message transport mechanism and method stores an upstream message queue and a downstream message queue in system main memory. Queue addresses are stored both in system main memory and designated registers of I/O adapters. The I/O adapters utilize the queue addresses to manage the transfer of downstream command messages and to send upstream response messages to the system main memory via direct memory access across the I/O bus.

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Inside the AS/400, Chapter 10, pp. 253-275, by Frank Soltis, Duke Press, Loveland, Colorado, 1996.
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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".

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