Transparent and Non-Transparent Bridging Between CXL.mem and CXL.io for Scalable Memory Infrastructure

A system comprising:

• a computer coupled to a first interface and a second interface;
• wherein the first interface is configured to communicate with a first entity according to CXL.mem;
• wherein the second interface is configured to communicate with a second entity according to CXL.io;
• and
• wherein the computer is configured to:
• receive, via the first interface, a CXL.mem Master-to-Subordinate (M2S) request comprising a first opcode, a first Tag, and a first address;
• translate the CXL.mem M2S request to a CXL.io request comprising a second Tag and a second address;
• send, via the second interface, the CXL.io request to the second entity;
• receive, via the second interface, a CXL.io completion comprising the second Tag and a data payload;
• translate the CXL.io completion to a CXL.mem Subordinate-to-Master Data Response (S2M DRS) comprising a second opcode, the first Tag, and the data payload;
• and
• send, via the first interface, the CXL.mem S2M DRS to the first entity.

A method for translating between Compute Express Link (CXL) messages, comprising:

• receiving, from a first entity via a first interface, a CXL.io request comprising a first Tag and a first address;
• translating the CXL.io request to a CXL.mem Master-to-Subordinate (M2S) request comprising a second Tag and a second address;
• sending, via a second interface, the CXL.mem M2S request to a second entity;
• receiving, from the second entity via the second interface, a CXL.mem Subordinate-to-Master Data Response (S2M DRS) comprising the second Tag and data;
• translating the CXL.mem S2M DRS to a CXL.io completion comprising the first Tag and the data;
• and
• sending, via the first interface, the CXL.io completion to the first entity.

A system comprising:

• a computer coupled to a first interface and a second interface;
• wherein the first interface is configured to communicate with a first entity according to CXL.io;
• wherein the second interface is configured to communicate with a second entity according to CXL.mem;
• and
• wherein the computer is configured to:
• receive, via the first interface, a CXL.io request comprising a first Tag and a first address;
• translate the CXL.io request to a CXL.mem Master-to-Subordinate (M2S) request comprising a second Tag and a second address;
• send, via the second interface, the CXL.mem M2S request to the second entity;
• receive, via the second interface, a CXL.mem Subordinate-to-Master Data Response (S2M DRS) comprising the second Tag and data;
• translate the CXL.mem S2M DRS to a CXL.io completion comprising the first Tag and the data;
• and
• send, via the first interface, the CXL.io completion to the first entity.