Providing input/output virtualization (IOV) by mapping transfer requests to shared transfer requests lists by IOV host controllers

摘要

An input/output virtualization (IOY) host controller (HC) (IOV-HC) of a flash-memory-based storage device is disclosed. In one aspect, an IOV-HC is coupled to input/output (I/O) clients via corresponding client register interfaces (CRIs), and is also coupled to a flash-memory-based storage device. The IOV-HC comprises transfer request list (TRL) slot offset registers indicating slots of a shared TRL that are assigned as base slots to each of the CRIs. The IOV-HC further comprises TRL slot count registers indicating how many slots of the shared TRL are assigned to each of the CRIs. When a transfer request (TR) directed to the flash-memory-based storage device is received from a CRI, the IOV-HC is configured to map the TR to a slot of the shared TRL based on a TRL slot offset register and a TRL slot count register of the plurality of TRL slot count registers corresponding to the CRI.

主权项

1. An input/output virtualization (IOV) host controller (HC) (IOV-HC) communicatively coupled to a plurality of input/output (I/O) clients via a corresponding plurality of client register interfaces (CRIs), and to a flash-memory-based storage device;
the IOV-HC comprising:
a plurality of transfer request list (TRL) slot offset registers, each indicating a slot of a shared TRL that is assigned as a base slot to each CRI of the plurality of CRIs; anda plurality of TRL slot count registers, each indicating a number of slots of the shared TRL assigned to each CRI of the plurality of CRIs; and the IOV-HC configured to:
receive a transfer request (TR) directed to the flash-memory-based storage device from a CRI of the plurality of CRIs; andmap, by a TR fetch circuit of the IOV-HC, the TR to a slot of the shared TRL based on a TRL slot offset register of the plurality of TRL slot offset registers and a TRL slot count register of the plurality of TRL slot count registers, the TRL slot offset register and the TRL slot count register corresponding to the CRI.