Transferring data over a remote direct memory access (rdma) network

Abstract

Embodiments that provide one-shot remote direct memory access (RDMA) are provided. In one embodiment, a single command for a completion process of a remote direct memory access (RDMA) operation is received in a computing device. The computing device executes the completion process of the RDMA operation in response to the single command being received.

What is claimed is: 
     
         1 . A host device, comprising:
 a driver configured to provide a single command for an initiation process of a remote direct memory access (RDMA) operation;   a network interface in communication with the driver, wherein the network interface is configured to:
 receive the single command from the driver; 
 execute the initiation process of the RDMA operation in response to the command being received; and 
 transfer data over an RDMA network subsequent to the initiation process being executed. 
   
     
     
         2 . The host device of  claim 1 , wherein the single command comprises buffer command information and a write command. 
     
     
         3 . The host device of  claim 1 , wherein the single command comprises a command to bind at least a portion of a memory buffer to a steering tag. 
     
     
         4 . The host device of  claim 1 , wherein the single command provides scatter/gather (SGL) information. 
     
     
         5 . The host device of  claim 1 , wherein the network interface is configured to transmit a send command to another host device in response to the single command. 
     
     
         6 . The host device of  claim 1 , wherein the initiation process is a one-shot initiation process. 
     
     
         7 . The host device of  claim 1 , wherein the driver is configured to provide a steering tag value in a header field of the single command. 
     
     
         8 . A method, comprising:
 receiving, in a computing device, a single command for a completion process of a remote direct memory access (RDMA) operation; and   executing, in the computing device, the completion process of the RDMA operation in response to the single command being received.   
     
     
         9 . The method of  claim 8 , wherein the single command is generated by a driver in the computing device. 
     
     
         10 . The method of  claim 9 , wherein the completion process is executed by a network interface in the computing device. 
     
     
         11 . The method of  claim 8 , wherein the single command comprises a send complete indication. 
     
     
         12 . The method of  claim 8 , comprising receiving, in the computing device, a message comprising a steering tag value that is associated with a remote device. 
     
     
         13 . The method of  claim 12 , wherein the message comprises data that indicates a validity of the steering tag value. 
     
     
         14 . The method of  claim 12 , comprising, de-associating, in the computing device, the steering tag value with at least a portion of a resource that is associated with the steering tag value. 
     
     
         15 . The method of  claim 8 , wherein:
 the single command is generated by a driver in the computing device; and   the completion process is executed by a network interface card that is in communication with the driver.   
     
     
         16 . A computing device, comprising:
 circuitry that receives a single command for a remote direct memory access (RDMA) operation;   circuitry that executes at least one of an initiation process or a completion process of the RDMA operation in response to the single command; and   circuitry that transfers data over an RDMA network in response to the single command.   
     
     
         17 . The computing device of  claim 16 , wherein the single command comprises a send complete indication. 
     
     
         18 . The computing device of  claim 16 , wherein the single command comprises an instruction to write an RDMA send message. 
     
     
         19 . The computing device of  claim 16 , wherein the single command comprises a steering tag value. 
     
     
         20 . The computing device of  claim 16 , wherein the circuitry that receives and the circuitry that executes are located in a network interface in the computing device.