[PATCH v2 1/3] dts: initial queue start/stop suite implementation

[Dean Marx]

This suite tests the ability of the Poll Mode Driver to enable and disable
Rx/Tx queues on a port.

Signed-off-by: Dean Marx <dmarx at iol.unh.edu>
---
 dts/tests/TestSuite_queue_start_stop.py | 79 +++++++++++++++++++++++++
 1 file changed, 79 insertions(+)
 create mode 100644 dts/tests/TestSuite_queue_start_stop.py

diff --git a/dts/tests/TestSuite_queue_start_stop.py b/dts/tests/TestSuite_queue_start_stop.py
new file mode 100644
index 0000000000..e180b916e8
--- /dev/null
+++ b/dts/tests/TestSuite_queue_start_stop.py
@@ -0,0 +1,79 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright(c) 2024 University of New Hampshire
+
+"""Rx/Tx queue start and stop functionality suite.
+
+This suite tests the ability of the poll mode driver to start and
+stop either the Rx or Tx queue (depending on the port) during runtime,
+and verify that packets are not received when one is disabled.
+
+Given a paired port topology, the Rx queue will be disabled on port 0,
+and the Tx queue will be disabled on port 1.
+
+"""
+
+from scapy.layers.inet import IP  # type: ignore[import]
+from scapy.layers.l2 import Ether  # type: ignore[import]
+from scapy.packet import Raw  # type: ignore[import]
+
+from framework.remote_session.testpmd_shell import TestPmdForwardingModes, TestPmdShell
+from framework.test_suite import TestSuite
+
+class TestQueueStartStop(TestSuite):
+    """DPDK Queue start/stop test suite.
+
+    Ensures Rx/Tx queue on a port can be disabled and enabled.
+    Verifies packets are not received when either queue is disabled.
+    """
+
+    def set_up_suite(self) -> None:
+        """Set up the test suite.
+
+        Setup:
+            Create a testpmd session and set up tg nodes
+            verify that at least two ports are open for session
+        """
+        self.verify(len(self._port_links) > 1, "Not enough ports")
+
+    def send_packet_and_verify(self, should_receive: bool = True):
+        """Generate a packet, send to the DUT, and verify it is forwarded back.
+
+        Args:
+            should_receive: indicate whether the packet should be received
+        """
+        packet = Ether()/IP()/Raw(load="xxxxx")
+        received = self.send_packet_and_capture(packet)
+        test_packet = None
+        for packet in received:
+            if packet.haslayer(Raw) and packet[Raw].load == b'xxxxx':
+                test_packet = packet
+                break
+        if should_receive:
+            self.verify(test_packet is not None, "Packet was dropped when it should have been received")
+        else:
+            self.verify(test_packet is None, "Packet was received when it should have been dropped")
+
+    def test_all_queues_enabled(self) -> None:
+        """Ensure packets are received when both Tx and Rx queues are enabled.
+
+        Test:
+            Create an interactive testpmd session, stop Rx queue on port 0, verify
+            packets are dropped. Then start port 0 Rx queue, stop port 1 Tx queue, and
+            verify packets are dropped."""
+        testpmd = self.sut_node.create_interactive_shell(TestPmdShell, privileged=True)
+        testpmd.set_forward_mode(TestPmdForwardingModes.mac)
+        testpmd.stop_port_queue(0, 0, True)
+
+        testpmd.start()
+        self.send_packet_and_verify(False)
+        testpmd.stop()
+
+        testpmd.start_port_queue(0, 0, True)
+        testpmd.stop_port_queue(1, 0, False)
+
+        testpmd.start()
+        self.send_packet_and_verify(False)
+        testpmd.close()
+
+    def tear_down_suite(self) -> None:
+        """Tear down the suite."""
-- 
2.44.0