DATA TRANSFER USING COHERENT DOORBELL UPDATES

Systems or methods of the present disclosure may provide systems and techniques for efficiently transferring data between a host processing unit and connected devices using coherent doorbell register updates. For example, a method may include: receiving, via controller of host processing circuitry, an attempt to write data to a cacheable memory address from a processing unit of the host processing circuitry; transmitting, via the controller, an indication of the attempt to write to the cacheable memory address to a device; receiving, via the controller, an acknowledgment from the device that the cacheable memory address has been deallocated by the device; and writing, via the controller, the data to the cacheable memory address in response to the acknowledgement from the device.