iWARP send with immediate data operations

摘要

Apparatus, methods and systems for supporting Send with Immediate Data messages using Remote Direct Memory Access (RDMA) and the Internet Wide Area RDMA Protocol (iWARP). iWARP logic in an RDMA Network Interface Controller (RNIC) is configured to generate different types of Send with Immediate Data messages, each including a header with a unique RDMA opcode identifying the type of Send with Immediate Data message, and send the message to an RDMA remote peer using iWARP implemented over an Ethernet network. The iWARP logic is further configured to process the Send with Immediate Data messages received from the RDMA remote peer. The Send with Immediate Data messages include a Send with Immediate Data message, a Send with Invalidate and Immediate Data message, a Send with Solicited Event (SE) and Immediate Data message, and a Send with Invalidate and SE and Immediate Data message.

主权项

1. An apparatus, comprising:
an Ethernet network interface, configured to send and receive packetized data over an Ethernet Network; and Internet Wide Area Remote Direct Memory Access Protocol (iWARP) logic, configured to facilitate operations when the apparatus is operating including,
generating a plurality of different types of Remote Direct Memory Access (RDMA) Send with Immediate Data message variants; andsending the Send with Immediate Data messages outbound from the Ethernet network interface to an RDMA remote peer using iWARP, wherein one type of Send with Immediate Data message comprises a Send with Immediate Data message including a DDP segment having a DDP header containing an opcode in an RDMA Control field indicating the message is a Send with Immediate Data message and including a field immediately following the DDP header containing immediate data, and wherein one type of Send with Immediate Data message comprises a Send with Invalidate and Immediate Data message including a DDP segment having a DDP header containing an opcode in an RDMA Control field indicating the message is a Send with Invalidate and Immediate Data message and a field containing data identifying a Steering Tag (STag) to invalidate, and including a field immediately following the DDP header containing immediate data.