Storage card and storage device

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

• a memory controller connected to non-volatile memory module;
• a first module that exposes a set of registers to the host through BARs (base address registers) of a PCIe (peripheral component interconnect express) interface;
• a second module that fetches a command of an I/O (input/output) request from the host memory when the set of registers is written;
• a third module that detects a location of the host memory based on a PRP (physical region page) of request information included in the command in response to signaling of the second module, and performs a transfer of target data for the I/O request between the host memory and the memory controller;
• and
• a fourth module that writes a completion event to the host memory through the BARs in response to service completion of the I/O request in the third module, and informs the host about I/O completion by writing an interrupt,
• wherein the first module, the second module, the third module, and the fourth module are implemented as hardware.

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

• a non-volatile memory module;
• a memory controller connected to non-volatile memory module;
• a first module that exposes a set of registers including a first register to the host through a configuration space of a host interffice for connection with the host, the first register being written when the host submits a command of an I/O (input/output) request to the host memory;
• a second module that fetches the command from the host memory when the first register is written;
• a third module that detects a location of the host memory based on a host memory address of request information included in the command in response to signaling of the second module, and performs a transfer of target data for the I/O request between the host memory and a memory controller for the non-volatile memory module;
• and
• a fourth module that writes a completion event to the host memory through the configuration space in response to service completion of the I/O request in the third module, and informs the host about I/O completion by writing an interrupt.