Page request interface support in handling host submission queues and completion automation associated with caching host memory address translation data

Abstract

A device includes an address translation circuit of host interface circuitry to handle address translation requests to a host system from a host queue interface circuit. The address translation circuit includes cache to store address translations associated with the address translation requests. The host queue interface circuit, coupled to the address translation circuit, is to: pause command fetch arbitration on a submission queue of the host system that is targeted by an address translation request that missed at the cache; trigger a page request interface (PRI) handler to send a page miss request to a translation agent (TA) of the host, the page miss request including a virtual address of the address translation request; receive a restart message from the PRI handler upon the PRI handler receiving a page miss response from the TA; and restart command arbitration on the submission queue that was paused responsive to the restart message.