Intel Corporation

David L Chalupsky

Thomas L Stachura

James M Ostrowski

Adee Ofir Ran

Kent C Lusted

Dave B Minturn

Richard I Mellitz

Susan S Meredith

Daniel R Gaur

Kevan A Lillie

John L Baudrexl

Ni Jie

Timothy E W Labatte

Warren R Morrow

Wendell S Wenjen

Methods and apparatus for Ethernet auto-negotiation (AN) with parallel detect for 10G DAC or other non-auto-negotiated modes. AN base pages are transmitted from an Ethernet apparatus to advertise the ability to support at least one Institute of Electrical and Electronics Engineers (IEEE) 802.3 Ethernet specification supporting AN. A receiver and associated processing circuitry is configured to perform two detection modes in parallel, including a first detection mode that looks for a valid signal transmitted from an Ethernet link peer that does not support AN and a second detection mode looking for AN pages from an IEEE 802.3 Ethernet link peer that supports AN. If the link peer does not support AN, an Ethernet link is set up to use signaling in accordance with the Ethernet specification that does not support AN. If the link peer supports AN, an Ethernet link is set up using a corresponding IEEE 802.3 Ethernet link supporting AN. Supported non-AN Ethernet links include 10G DAC links.

Ethernet auto-negotiation with parallel detect for 10G DAC or other non-auto-negotiated modes

Provided are a method, system, and program for managing data transmissions at a local network device communicating with a linked network device over a network, wherein each network device is capable of transmitting data at different speeds. An operation is initiated to change a current transmission speed at which data is transmitted between the local and linked network devices in response to a speed change event. A determination is made of a new transmission speed different from the current transmission speed. A register is set in the local network device to indicate the new transmission speed. A speed change request and the new transmission speed are transmitted to the linked network device to cause the local and linked network devices to communicate at the new transmission speed, wherein the transmission occurs without terminating a linked exchange occurring between the local and linked network devices.

Method, system, and program for managing a speed at which data is transmitted between network adaptors

A method for determining if a cable is present at a network connection, and adjusting a power signal to the network connection depending upon whether or not a cable is present is disclosed.

System for conserving power by ceasing at least one clock signal from PHY layer to MAC layer in network adapter if signal from cable is not detected

A bus bridging method, a bus bridge and a bus agent are described. In a bus agent provides to a bus bridge a read data request targeting a data source bridged by the bus bridge. The read data request includes a read address indicating a starting storage location of the requested data, and a read size indicator indicating the size of the requested data. The bus bridge, in response, facilitates provision of the requested data to the bus agent. The facilitation includes streaming buffered ones of the requested data to the bus agent through one or more successive streaming connections to the bus bridge by the bus agent.

Bus bridging method and apparatus including use of read size indicators

The present invention includes a method and apparatus for smooth transitions (switching) between asynchronous clocks without the occurrence of glitches. In one embodiment the present invention is used when powering up and powering down a computer system and transitioning between a relatively faster primary clock and a slower alternate clock. In another embodiment the present invention is used for transitioning between a relatively faster primary clock to a slower alternate clock to conserve power, for example, when a laptop transitions between use mode and sleep mode.

Smooth clock switching for power managed PCI adapters

A circuit to control a network interface includes a first interface circuit and a second interface circuit. The first interface circuit is capable of negotiating one protocol to use from a plurality of known interface protocols. The first interface circuit controls the network interface when the negotiated interface protocol is supported by the first interface circuit. Otherwise, if the second interface circuit supports the negotiated protocol, the first interface circuit releases control of the network interface to the second interface circuit. The first interface circuit takes control of the network interface from the second interface circuit when the second interface circuit signals the first interface circuit that reliable communication with the network has been lost.

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Banks, OR, United States of America

David L Chalupsky