Apparatus and methods for a simplified, multi-client SAS port for management of other devices in an enhanced SAS device

摘要

Apparatus and associated methods for a simplified multi-client initiator/target within a SAS device. Features and aspects hereof provide a simplified initiator/target component to enable cost reduction and simplification of SAS devices requiring only limited initiator/target functionality. In one embodiment, a SAS expander may incorporate simplified SSP/STP/SMP initiator/target features and aspects hereof to permit simple management of devices coupled to the expander or coupled downstream through other expanders. The simplified multi-client initiator/target suffices for simple management functions while reducing cost and complexity of the SAS expander. Features and aspects hereof may be implemented with shared circuits for each of multiple client protocols coupled with firmware operable in a general or special purpose processor embedded in the SAS device.