The method of transmitting message data PCIe interface, the bridging module, the read module and system

The present application discloses a PCIe interface method of transmitting data packets, the bridge module, a reading module and a system, wherein the method comprises: at the end of each bridge module is provided corresponding to the PCIe interface pointers for memory space in the CPU; respectively each PCIe the interface, the write pointer and the write pointer space corresponding to each PCIe interface. In the present application, since the message data is only written into the CPU memory cache block via PCIe interface; and a PCIe interface via the packet descriptors into the receive queue in the CPU after completion of these two steps, each pointer same space will pointer, each pointer when the pointer so through the same space, then the read pointer for packet data mode, can effectively avoid bridging in the PCIe interface module supports multiple data transfer, due to the different message data write pointer PCIe interface different delays caused by the above-described two steps prior to reading errors caused.