Hardware interface between a switch adapter and a communications

Details Hardware interface between a switch adapter and a communications Hardware interface between a switch adapter and a communications

1997-08-26

2000-08-29

Kizou, Hassan

Multiplex communications

Communication techniques for information carried in plural...

Adaptive

370259, 370467, 39550046, 709301, 710 8, 712 36, G06F 300

Patent

active

06111894&

ABSTRACT:
Method, apparatus and program product for communicating from a node to a communications device. A Hardware Abstraction Layer (HAL) provides functions which can be called from user space in a node to access the communications device. An instance of HAL is created in the node. Device specific characteristics from the communications device and a pointer pointing to HAL functions for accessing the communications device are obtained by HAL. HAL then opens multiple ports on the communications device using the functions pointed to by the pointer, and messages are sent between the node and the communications device. The messages thus sent are optimized with respect to the communications device as determined by the obtained device specific characteristics. Multiple processes and protocol stacks may be associated with each port in a single instance of HAL. A further embodiment provides that multiple virtual ports may be associated with a port, with a multiple protocol stacks associated with each virtual port. A further embodiment provides that multiple communications devices may be associated with a single instance of HAL.

REFERENCES:
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patent: 5742825 (1998-04-01), Mathur et al.
patent: 5909559 (1999-06-01), So
patent: 5958016 (1999-09-01), Chang et al.
patent: 5987590 (1999-11-01), So

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