Via Technologies, Inc.

Peter Chia

Chih-Kuo Kao

Jiin Lai

Wei-Hsiang Hong

Yao-Chun Su

Chad Tsai

Edward Su

A request scheduling method is provided in a request accessing system having a processing unit, an upstream unit coupled to the processing unit, a downstream unit coupled to the processing unit and the upstream unit, and at least one endpoint device coupled to the upstream unit and the downstream unit, wherein the endpoint device asserts at least one request to the upstream unit. The request scheduling method includes: transmitting the request to a processing unit while the request is a non-peer-to-peer request, and transmitting the request to a downstream unit while the request is a peer-to-peer request; wherein if the request is a peer-to-peer and posted request and there is a previous asserted request which is peer-to-peer and non-posted request and the previous asserted request has a latency exceeds a predetermined time, transmitting the request earlier than the previous asserted request to the downstream unit.

Method and system for request accessing and scheduling

The present computing system using PCI-E architecture includes at least one first PCI-E port, a first port-arbiter, a first URD logic, a microprocessor, a DARD logic and a device arbiter. The first port-arbiter receives a data from the first PCI-E port. The first URD logic is coupled to said first port-arbiter. The first URD logic includes an onboard range table and a PCI-E device range table for detecting the data of onboard access or peer-to-peer access. The microprocessor receives and processes the data from the first URD logic for said onboard access. The DARD logic receives the data from the microprocessor. The DARD logic decodes a device range of a downstream request of the data. The device arbiter is coupled to the DARD logic and the first URD logic for dispatching the data to one of the first PCI-E port.

Chipset supporting a peripheral component interconnection express (PCI-E) architecture

Growing community of inventors

Taipei, Taiwan

Peter Chia