A method and controller for implementing storage adapter performance optimization with chained hardware operations completion coalescence, and a design structure on which the subject controller circuit resides are provided. The controller includes a plurality of hardware engines, and a processor. A plurality of the command blocks are selectively arranged by firmware in a predefined chain including a plurality of simultaneous command blocks. All of the simultaneous command blocks are completed in any order by respective hardware engines, then the next command block in the predefined chain is started under hardware control without any hardware-firmware (HW-FW) interlocking with the simultaneous command block completion coalescence.