Systems and methods for maintaining specific ordering in bus traffic

A method, comprising:

• receiving, by a first interface, transactions using a first communication protocol;
• storing, by a first queue, transactions of a first type used in the first communication protocol, wherein the first type does not require an acknowledgement of completion;
• storing, by a second queue, transactions of a second type that requires acknowledgement of completion;
• selecting, by control logic, a first transaction from the first queue, in response to determining the first transaction is older than any transaction stored in the second queue;
• sending, by the control logic, the selected first transaction for processing;
• and
• waiting, by the control logic, for an acknowledgment of completion of the selected first transaction before any transaction in the second queue is selected for processing.

A non-transitory computer readable storage medium storing program instructions, wherein the program instructions are executable by a processor to:

• receive transactions using a first communication protocol;
• store in a first queue transactions of a first type used in the first communication protocol, wherein the first type does not require an acknowledgement of completion;
• store in a second queue transactions of a second type that requires acknowledgement of completion;
• and
• select a first transaction from the first queue, in response to determining the first transaction is older than any transaction stored in the second queue;
• send the selected first transaction for processing;
• and
• wait for an acknowledgment of completion of the selected first transaction before any transaction in the second queue is selected for processing.