PCIE BUS BASED DATA TRANSMISSION METHOD AND DEVICE

摘要

The present invention relates to the technical field of communication, and disclosed are a PCIe bus based data transmission method and device. The method comprises: a non-transparent bridge (NTB) receives a request TLP transmitted by a requesting device, the request TLP comprising a Requester ID field, a Tag field and an address field; the Requester ID field carries the bus number, device number and function number of the requesting device; the address field is used to indicate the address of a target device, the Requester ID field carrying the bus number, device number and function number of the requesting device; the requesting device and the target device are respectively in the first, and second PCIe bus domains connected via the NTB; substituting the bus number, device number and function number of the requesting device in the requesting TLP with the bus number, device number and function number of the NTB in the second PCIe bus domain, and transmitting the substituted requesting TLP to the target device, such that no error will occur when IOMMU performs legitimacy check on the requesting TLP.