Marvell Asia Pte., Ltd.

Marvell International Limited

Marvellworld Trade Ltd.

Xiongzhi Ning

Steffen Dolling

Markus Althoff

Manfred Kunz

Biing Long Shu

Thomas Kniplitsch

Lukas Reinbold

Olaf Mater

Sudong Yu

Yuyi Tang

A network switch, for use in an Ethernet network in a vehicle, includes multiple ports, a switch unit, a peripheral bus, multiple DMA engines and a mapping engine. The ports connect to the Ethernet network. The switch unit forwards packets s among the ports. The peripheral bus connects to a host that runs host applications. The DMA engines transfer packets from the host applications via the peripheral bus to the switch unit. The mapping engine constructs a mapping that maps between (i) bus functions of the peripheral bus that are assigned to the host applications, and (ii) respective ones of the DMA engines, and configures the switch unit, in accordance with the mapping, to permit forwarding of a packet sent from a host application only upon verifying that a DMA engine that transferred the packet is mapped to the bus function assigned to the host application.

Automotive network switch with attack protection

A system-on-chip integrated circuit device includes a plurality of functional circuit modules, at least a first circuit module of the plurality of functional circuit modules operating under a first protocol, the first protocol being an interface protocol for communicating outside the system-on-chip integrated circuit device, an interconnect fabric coupled to the functional circuit modules in the plurality of functional circuit modules, and a built-in self-test circuit module coupled to the interconnect fabric. The built-in self-test circuit is configured to test one or more selected functional circuit modules in the plurality of functional circuit modules, including at least the first circuit module under the first protocol for communicating outside the system-on-chip integrated circuit device, by routing test data through the one or more selected functional circuit modules.

Built-in testing in modular system-on-chip device

A network includes a first plurality of nodes operating in a first clock domain based on a first clock source, a second plurality of nodes operating in a second clock domain based on a second clock source, and synchronization circuitry accessible to both of the clock domains without requiring network traffic between the clock domains. The synchronization circuitry is configured to periodically calculate a drift rate between the time of day in the respective clock domains. Each node in one of the clock domains is configured to, when sending a message to a node in the other of the clock domains, calculate a time of day in the other of the clock domains based on an actual time of day in the one of the clock domains and the drift rate, and to include, in the message to the node in the other clock domain, the calculated time of day.

Synchronization of clock domains on a data network

A network switch includes a data bus, a register, an endpoint controller and a direct memory access controller. The endpoint controller is configured to receive a descriptor generated by a device driver of a host system, store the descriptor in the register, and transfer data between a root complex controller of the host system and the data bus. The descriptor identifies an address of a buffer in a memory of the host system. The direct memory access controller is configured to receive the address of the buffer from the endpoint controller or the register and, based on the address and an indication generated by the device driver, independently control transfer of the data between the memory of the host system and a network device connected to the network switch. The direct memory access controller is a receive direct memory access controller or a transmit direct memory access controller.

Network switch with DMA controller for independent direct memory access of host system

Network switch with endpoint and direct memory access controllers for in-vehicle data transfers

Some embodiments described herein provide a method for transmitting an access request via a flexible register access bus. An access request may be received to access resource on an integrated circuit. The access request may be translated to a request packet having a data format compliant with the flexible register access bus. A routing path may be determined for the request packet based on a target register associated with the request packet. The request packet may be transmitted via the routing path to the target register. Information within the request packet may be translated to a local access protocol for the target register. Access to the resource may then be obtained via the target register based on the local access protocol.

Systems and methods for transmitting an access request via a flexible register access bus

A system including a bus, a buffer, a bridge and a module. The bus is connected to multiple devices. The buffer is connected to the bus. The buffer is configured to transfer data to or receive the data from one or more of the devices, forward the data during a forwarding mode, and receive the data during a gathering mode. The module is configured to determine whether a first condition and/or a second condition exist. Based on whether the first condition exists, the module is configures the bridge to transfer the data from the buffer to a host system or transitions the buffer from the gathering mode to the forwarding mode to forward the data from the buffer to the one or more of the devices. Based on whether the second condition exists, the module is configured to transition the buffer from the forwarding mode to the gathering mode.

System and method for controlling flow of data through a buffer to increase time a bridge is in a low power state

A bridge includes buses, a memory, a component module, an interface and an interrupt module. The component module transfers data between a host control module and a network device via the memory and the buses. The interface is connected between the memory and the network device and transmits status information to the memory via one of the buses. The status information indicates completion of a last data transfer between the network device and the host control module. An interrupt module, subsequent to the status information being transmitted to the memory, detects a first interrupt generated by the network device, and transmits an interrupt message to the component module via the memory and the one of the buses. The component module then generates a second interrupt detectable by the host control module. The second interrupt indicates completion of data transfer between the network device and the host control module.

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Karlsruhe, Germany

Xiongzhi Ning