[PATCH rdma-core 7/8] Documentation: Add extended QP to pyverbs's doc

[Noa Osherovich <noaos@mellanox.com>]

Add a code snippet to demonstrate an extended QP creation using
pyverbs.

Signed-off-by: Noa Osherovich <noaos@mellanox.com>
Reviewed-by: Edward Srouji <edwards@mellanox.com>
---
 Documentation/pyverbs.md | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/Documentation/pyverbs.md b/Documentation/pyverbs.md
index c7dddd598303..325e214fca0e 100755
--- a/Documentation/pyverbs.md
+++ b/Documentation/pyverbs.md
@@ -339,6 +339,30 @@ wr = pwr.SendWR()
 wr.set_wr_ud(ah, 0x1101, 0) # in real life, use real values
 udqp.post_send(wr)
 ```
+###### Extended QP
+An extended QP exposes a new set of QP send operations to the user -
+extensibility for new send opcodes, vendor specific send opcodes and even vendor
+specific QP types.
+Pyverbs now exposes the needed interface to create such a QP.
+Note that the IBV_QP_INIT_ATTR_SEND_OPS_FLAGS in the `comp_mask` is mandatory
+when using the extended QP's new post send mechanism.
+```python
+from pyverbs.qp import QPCap, QPInitAttrEx, QPAttr, QPEx
+import pyverbs.device as d
+import pyverbs.enums as e
+from pyverbs.pd import PD
+from pyverbs.cq import CQ
+
+
+ctx = d.Context(name='mlx5_0')
+pd = PD(ctx)
+cq = CQ(ctx, 100)
+cap = QPCap(100, 10, 1, 1, 0)
+qia = QPInitAttrEx(qp_type=e.IBV_QPT_UD, scq=cq, rcq=cq, cap=cap, pd=pd,
+                   comp_mask=e.IBV_QP_INIT_ATTR_SEND_OPS_FLAGS| \
+                   e.IBV_QP_INIT_ATTR_PD)
+qp = QPEx(ctx, qia)
+```
 
 ##### XRCD
 The following code demonstrates creation of an XRCD object.
-- 
2.21.0