[PATCH rdma-core 5/5] Documentation: Document creation of CMID

[Noa Osherovich <noaos@mellanox.com>]

From: Maxim Chicherin <maximc@mellanox.com>

Add code snippet to demonstrate creation of CMID and establish
connection (synchronous control path).

Signed-off-by: Maxim Chicherin <maximc@mellanox.com>
---
 Documentation/pyverbs.md | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/Documentation/pyverbs.md b/Documentation/pyverbs.md
index 29ab9592c53c..6ff6fc5bbc37 100755
--- a/Documentation/pyverbs.md
+++ b/Documentation/pyverbs.md
@@ -390,3 +390,33 @@ srq_attr.comp_mask = e.IBV_SRQ_INIT_ATTR_TYPE | e.IBV_SRQ_INIT_ATTR_PD | \
                      e.IBV_SRQ_INIT_ATTR_CQ | e.IBV_SRQ_INIT_ATTR_XRCD
 srq = SRQ(ctx, srq_attr)
 ```
+
+##### CMID
+The following code snippet will demonstrate creation of a CMID object, which
+represents rdma_cm_id C struct, and establish connection between two peers.
+Currently only synchronous control path is supported (rdma_create_ep).
+For more complex examples, please see tests/test_rdmacm.
+```python
+from pyverbs.qp import QPInitAttr, QPCap
+from pyverbs.cmid import CMID, AddrInfo
+import pyverbs.cm_enums as ce
+
+cap = QPCap(max_recv_wr=1)
+qp_init_attr = QPInitAttr(cap=cap)
+server = '11.137.14.124'
+port = '7471'
+
+# Active side
+
+cai = AddrInfo(server, port, ce.RDMA_PS_TCP)
+cid = CMID(creator=cai, qp_init_attr=qp_init_attr)
+cid.connect()  # send connection request to server
+
+# Passive side
+
+sai = AddrInfo(server, port, ce.RDMA_PS_TCP, ce.RAI_PASSIVE)
+sid = CMID(creator=sai, qp_init_attr=qp_init_attr)
+sid.listen()  # listen for incoming connection requests
+new_id = sid.get_request()  # check if there are any connection requests
+new_id.accept()  # new_id is connected to remote peer and ready to communicate
+```
-- 
2.21.0