Coherent access to persistent memory region range

A data storage device, comprising:

• a controller configured to execute a method of driver access and driverless access of a non-volatile memory of a non-volatile memory device by a host, the method comprising:
• initializing a PCIe memory space mapping a portion of the non-volatile memory of the non-volatile memory device to a host memory space through a PCIe link between the host and the non-volatile memory device;
• initializing a PCIe configuration space with a configuration information of the non-volatile memory device;
• sending load/store commands to the PCIe memory space for driverless access;
• sending read/write commands to an NVMe driver of the host for driver access utilizing the configuration information of the non-volatile memory device;
• and
• providing the load/store commands and read/write commands to an aggregated command queue for processing by the non-volatile memory device.

A system for storing data, comprising:

• one or more non-volatile memory means;
• and
• a controller means configured to carry out a method to maintain coherency between PMR and NVMe data transactions, the method comprising:
• establishing a PCIe link between a host and the non-volatile memory means and an NVMe link between the host and the non-volatile memory means;
• initializing a PCIe memory space mapping one or more portions of the non-volatile memory of the non-volatile memory means to a host memory space through a PCIe link between the host and the non-volatile memory means;
• sending load/store commands to the PCIe memory space for driverless access;
• placing the load/store commands in a persistent memory region (PMR) queue of the non-volatile memory means;
• and
• aggregating the load/store commands of the PMR que with one or more read/write commands of a Non-Volatile Memory express (NVMe) queue.