Storage Expansion Apparatus and Server

A storage expansion apparatus comprising:

• a quick path interconnect (QPI) interface module, which communicates with a central processing unit (CPU) through a QPI bus;
• a peripheral component interconnect express (PCIe) interface module, which communicates with the CPU through a PCIe bus;
• an interface selecting module connected to the QPI interface module and the PCIe interface module separately;
• a home agent (HA) module connected to the interface selecting module;
• and
• a memory controller engine (MCEng) module connected to the HA module and the interface selecting module separately;
• wherein, when the storage expansion apparatus serves as a storage input and output (TO) interface device, the PCIe interface module is configured to:
• complete receiving of PCIe data sent through the PCIe bus;
• process a PCIe protocol storage transaction in the PCIe data;
• and
• send a processed PCIe protocol storage transaction to the MCEng module through the interface selecting module,
• wherein the MCEng module implements a read/write drive function and provides an interface for connecting to a storage IO device,
• wherein when the storage expansion apparatus serves as a memory expansion device, the QPI interface module is configured to:
• complete receiving of QPI data sent through the QPI bus;
• obtain a QPI protocol transaction in the QPI data;
• send the QPI protocol transaction to the interface selecting module;
• and
• output the QPI protocol transaction in the QPI data to the HA module through the interface selecting module,
• wherein the HA module processes the QPI protocol transaction in the QPI data, and sends a processed QPI protocol transaction to the MCEng module,
• wherein the MCEng module implements a read/write drive function and provides an interface for connecting to an expanded memory,
• wherein when the storage expansion apparatus serves as a memory expansion device, the PCIe interface module is configured to:
• complete receiving of PCIe data sent through the PCIe bus;
• obtain a QPI protocol transaction in the PCIe data;
• send the QPI protocol transaction to the interface selecting module;
• and
• output the QPI protocol transaction in the PCIe data to the HA module through the interface selecting module,
• wherein the HA module processes the QPI protocol transaction in the PCIe data, and sends a processed QPI protocol transaction in the PCIe data to the MCEng module, and
• wherein the MCEng module implements a read/write drive function and provides an interface for connecting to an expanded memory.