iWARP

1. 1

   Create PD

   Allocate a protection domain on the RNIC.

2. 2

   Register MR

   reg_mr pins buffers; obtain lkey/rkey for local/remote access.

3. 3

   Create CQ + QP

   Completion queue and queue pair bound to the PD.

4. 4

   QP → INIT / RTR / RTS

   Exchange path attributes; move both QPs to Ready to Send.

5. 5

   Exchange rkey + addr

   Out-of-band handshake shares remote virtual address and rkey.

6. 6

   Post RDMA WRITE

   One-sided WR: DMA local buffer into remote MR; no remote RECV.

7. 7

   Poll CQ

   Initiator sees completion; remote CPU stays out of the data path.

Step 1 / 7

iWARP fields