Device and method for remote direct memory access

A receiving device for Remote Direct Memory Access (RDMA), wherein the receiving device comprises:

• a memory configured to store instructions;
• and
• a processor coupled to the memory and configured to execute the instructions to cause the receiving device to:
• receive one or more packets from a transmitting device for RDMA, wherein each packet of the one or more packets is associated with a packet sequence number (PSN), and comprises a transaction identifier (XID) of a corresponding working queue element (WQE), wherein each WQE comprises destination information of the WQE, wherein the destination information comprises at least one of:
• an address of the receiving device, an identifier of the receiving device, and an identifier of a target application of the receiving device;
• and
• transmit a notification message to the transmitting device, wherein the notification message indicates that the one or more packets are received at the receiving device.

A method for Remote Direct Memory Access (RDMA) applied to a transmitting device, wherein the method comprises:

• maintaining a send queue, wherein the send queue comprises one or more working queue elements (WQEs), wherein each WQE comprises destination information of the WQE, wherein the destination information comprises at least one of:
• an address of a receiving device, an identifier of a receiving device, and an identifier of a target application of a receiving device;
• assigning each of the one or more WQEs with a transaction identifier (XID), and translate each WQE into a respective packet, wherein each respective packet comprises the XID of the corresponding WQE and is associated with a packet sequence number (PSN);
• transmitting each packet to the receiving device of the destination information of the WQE;
• receiving a notification message for each transmitted packet from the receiving device, wherein the notification message indicates whether the transmitted packet is received at the receiving device;
• and
• based on the notification message, determining whether or not to generate a completion for each WQE on information carried in the WQE and information held by the transmitting device.

A method for Remote Direct Memory Access (RDMA) applied to a receiving device, wherein the method comprises:

• receiving one or more packets from a transmitting device for RDMA, wherein each packet of the one or more packets is associated with a packet sequence number (PSN), and comprises a transaction identifier (XID) of a corresponding working queue element (WQE), wherein each WQE comprises destination information of the WQE, wherein the destination information comprises at least one of:
• an address of the receiving device, an identifier of the receiving device, and an identifier of a target application of the receiving device;
• and
• transmitting a notification message to the transmitting device, wherein the notification message indicates that the one or more packets are received and/or processed at the receiving device.