Initiating multiple data transactions on a system bus

A method comprising:

• determining, by a peripheral requesting access to a system bus, a state of the peripheral;
• generating information indicating the state of the peripheral;
• transmitting the information over a communication link to a controller;
• and
• receiving, from the controller, access to the system bus according to the state of the peripheral and states of other peripherals requesting access to the system bus.

A system comprising:

• a system bus;
• a first peripheral coupled to the system bus;
• a second peripheral coupled to the system bus;
• a controller coupled to the system bus, the controller configured to receive over a first communication link first information from the first peripheral requesting a first data transaction, and to receive over a second communication link second information from the second peripheral requesting a second data transaction;
• determine first and second ranks for the first and second data transactions, respectively, based on the first and second information;
• and
• initiate, based on the first and second ranks, the first and second data transactions on the system bus.

A non-transitory, computer-readable medium storing instructions, which, when executed by one or more processors, causes the one or more processors to perform operations comprising:

• receiving first information from a first peripheral requesting a first data transaction, the first information received over a first communication link;
• receiving second information from a second peripheral requesting a second data transaction, the second information received over a second communication link;
• determining first and second ranks for the first and second data transactions, respectively, based on the first and second information;
• and
• initiating, based on the first and second ranks, the first and second data transactions on a system bus.