Device, method and computer program product for multi-level address translation

A method for retrieving information from a storage unit, the method comprises:

• receiving, by an input output memory management unit second-level translation information representative of a partition of a storage unit address space;
• receiving, by a input output memory management unit, a direct memory access request that comprises a consumer identifier and a second memory address that was first-level translated by a communication circuit translation entity;
• performing, by the input output memory management unit, a second-level translation of the second memory address such as to provide a third memory address, in response to the identity of the consumer;
• and
• accessing the storage unit using the third memory address.

A system having information retrieval capabilities, the system comprises:

• an input output memory management unit adapted to:
• receive translation information representative of a partition of a storage unit address space;
• receive a direct memory access request that comprises a consumer identifier and a second memory address that was first-level translated by a communication circuit translation entity;
• perform, by the input output memory management unit, a second-level translation of the second memory address such as to provide a third memory address, in response to the identity of the consumer;
• and
• access the storage unit using the third memory address.

A computer program product comprising a computer usable storage medium including a computer readable program, wherein the computer readable program when executed on a computer causes the computer to:

• generate first-level translation information and second-level translation information;
• send to multiple communication circuit translation entities first-level translation information;
• send to an input output memory management unit the second-level translation information;
• cause a generation of at least one direct memory access request that requires first-level and second-level address translation that are responsive to the first-level and second-level translation information.