Achieving host performance booster (HPB) performance in non-volatile memory express (NVME) mode of multi-protocol storage devices

A method in a storage device for providing enhanced read performance in multiple modes, the storage device comprises a controller to execute the method comprising:

• initializing the storage device in a first mode that does not support a host performance booster (HPB) feature and publishing HPB capabilities of a second mode to a host communicating with the storage device in the first mode;
• configuring a host memory buffer (HMB) in response to a command from the host;
• identifying a control mode for accessing the HMB, loading a logical-to-physical mapping for a HPB sub-region into the HMB, and returning HMB information associated with the HPB sub-region logical-to-physical mappings in the HMB to the host;
• receiving a HPB read command including a logical block address, a physical block address and a length retrieved by the host from the HMB based on the HMB information;
• and
• using the logical block address, the physical block address and the length to retrieve data from a memory device without performing logical-to-physical address translation in the storage device.

A storage device to provide enhanced read performance in multiple modes, the storage device comprises:

• a controller to
• initialize the storage device in a first mode that does not support a host performance booster (HPB) feature and publish HPB capabilities of a second mode to a host communicating with the storage device in the first mode;
• configure a host memory buffer (HMB) in response to a command from the host;
• to identify one of
• i) a host-controlled mode to access the HMB, load a logical-to-physical mapping for a HPB sub-region into the HMB, and return HMB descriptors associated with the HPB sub-region logical-to-physical mappings in the HMB to the host, and
• ii) a device-controlled mode to access the HMB, load a logical-to-physical mapping for a HPB sub-region into the HMB, and complete asynchronous event request (AER) sent to the host, wherein the host uses information associated with a completed AER to access a logical-to-physical mapping in the HMB to the host;
• receive a HPB read command including a logical block address, a physical block address and a length retrieved by the host from the HMB;
• and
• use the logical block address, the physical block address and the length to retrieve data from a memory device without performing logical-to-physical address translation in the storage device.