Apparatus and method and computer program product for executing host input-output commands

A non-transitory computer program product for executing host input-output (IO) commands when executed by a processing unit of a device side, the non-transitory computer program product comprising program code of a first layer to:

• receive a slot bit table (SBT) comprising an entry from a second layer, wherein each entry is associated with an IO operation;
• receive a plurality of addresses of callback functions from the second layer, wherein the callback functions are implemented for a plurality of stages of a generic framework in response to different types of host IO commands;
• and
• repeatedly execute a loop until IO operations of the SBT have been processed completely, and, in each iteration of the loop, call the callback functions implemented in the second layer for a write operation or a read operation of the SBT to drive the frontend interface through the second layer to interact with the host side to transmit user data read from a storage unit to the host side, or receive user data to be programmed into the storage unit from the host side.

An apparatus for executing host input-output (IO) commands, comprising:

• a frontend interface, coupled to a host side;
• and
• a processing unit, coupled to the frontend interface, arranged to operably perform operations when loading and executing program code of a first layer:
• receiving a slot bit table (SBT) comprising an entry from a second layer, wherein each entry is associated with an IO operation;
• receiving a plurality of addresses of callback functions from the second layer, wherein the callback functions are implemented for a plurality of stages of a generic framework in response to different types of host IO commands;
• and repeatedly execute a loop until IO operations of the SBT have been processed completely,
• wherein, in each iteration of the loop, the processing unit is arranged to operably call the callback functions implemented in the second layer for a write operation or a read operation of the SBT to drive the frontend interface through the second layer to interact with the host side to transmit user data read from a storage unit to the host side, or receive user data to be programmed into the storage unit from the host side.