Apparatus and method of managing shared resources in achieving IO virtualization in a storage device

A method comprising:

• receiving a command from a host system to read data from or write data in a non-volatile semiconductor memory device, the command including a virtual function identifier and a transaction identifier;
• identifying, via a controller for the non-volatile semiconductor memory device that maintains a function mapping table which stores values that associate virtual functions with portions of shared resources of the controller, a portion of a shared resource of the controller that is addressable, based on the virtual function identifier and the transaction identifier;
• and
• accessing the identified portion of the shared resource in accordance with the received command.

A non-transitory computer-readable medium storing instructions that, when executed by a processor, cause the processor to perform a method comprising:

• receiving a command from a host system to read data from or write data in a non-volatile semiconductor memory device, the command including a virtual function identifier and a transaction identifier;
• identifying, via a controller for the non-volatile semiconductor memory device that maintains a function mapping table which stores values that associate virtual functions with portions of shared resources of the controller, a portion of a shared resource of the controller that is addressable, based on the virtual function identifier and the transaction identifier;
• and
• accessing the identified portion of the shared resource in accordance with the received command.