Marvell International Limited

Qlogic Corporation

Ihn Kim

Michael R Spaur

Aurelio J Cruz

A servo controller for a disk drive controller comprising a storage device that stores communication information for a plurality of devices and a serial port controller located on the servo controller that communicates with the storage device, that receives a request to communicate with one of the plurality of devices, and that allows communication between at least one processor and the one of the plurality of devices according to the stored communication information and the request, wherein each of the plurality of devices uses a different protocol.

Method and system for supporting multiple external serial port devices using a serial port controller in embedded disk controllers

A method and system for transferring control information between a host and network processor is provided. The system includes, a snooping module that is coupled to a snooping memory bus; a network cache controller; a host process scheduler that communicates with the network cache controller; and a host cache controller that controls a host cache for transferring control information without polling. The method includes, invalidating a data block in a network cache, after a message is composed by the host processor; invalidating a status block in the network cache after the message is posted; and transferring control from the host processor to the network processor. The method also includes, invalidating a status segment in a network cache after data is transferred from a host cache to a network cache; and invalidating a status segment in the host cache after data has been injected to a network.

Method and system for host device event synchronization

A serial port controller in an embedded disk drive controller is provided. The serial port controller includes a state machine that can access protocol information regarding plural devices operationally coupled to the serial port controller; a first register that can hold address information of the plural devices; and logic for enabling the plural devices for either a write or read request. The serial port controller also includes a second register for holding write data information for the plural devices; and a third register for holding read data information for the plural devices. The serial port controller reads programmed information regarding the plural device upon a client request; transmits the address of a device with whom communication is requested by the client; and transmits data to the plural devices, if the request by the client is to write data or collects data for a read request.

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Laguna Niguel, CA, United States of America

Ihn Kim