Non-volatile memory controller device and non-volatile memory device

A non-volatile memory controlling device configured to connect a non-volatile memory module and a host including a processor and a host memory, the device comprising:

• a first module including a first doorbell region that is exposed to base address registers (BARs) of a peripheral component interconnect express (PCIe) interface for connection with the host and a second doorbell region, an entry corresponding a target submission queue (SQ) in the first doorbell region being updated when a command is written to the target SQ of the host memory, and an entry corresponding to a target completion queue (CQ) in the second doorbell region being updated when an I/O service is terminated by the host;
• a second module that fetches the command from the target SQ in response to an event signal generated when the first doorbell region is updated;
• a first engine that detects a location of the host memory based on a physical region page (PRP) included in the command;
• a second engine that performs a transfer of target data for the I/O request between the location of the host memory detected by the first engine and the non-volatile memory module;
• and
• a third module that writes a completion request in the target CQ and handles an interrupt when the second engine completes to process the I/O request.

A non-volatile memory device configured to be connected to a host including a processor and a host memory, the device comprising:

• a non-volatile memory module;
• a first doorbell region that is exposed to a configuration space of a host interface for connection with the host and is updated when the host issues an input/output (I/O) request command to the host memory;
• a fetch managing module that fetches the command from the host memory in response to an event signal generated when the first doorbell region is updated;
• a data transferring module that checks a location of the host memory based on request information included in the command, and performs a transfer of target data for the I/O request between the host memory and the non-volatile memory module;
• a completion handling module that writes a completion request in the host memory and handles an interrupt when the data transferring module completes to process the I/O request;
• and
• a second doorbell region that is exposed to the configuration space and is updated when the I/O service is terminated by the host.