[PATCH] app/testpmd: revert primary process polling all queues fix

[Ferruh Yigit <ferruh.yigit@amd.com>]

For some drivers [1], testpmd forwarding is broken with commit [2].

This is because with [2] testpmd gets queue state from ethdev and
forwarding is done only on queues in started state, but some drivers
don't update queue status properly, and this breaks forwarding for those
drivers.

Drivers should be fixed but more time is required to verify drivers
again, instead reverting [2] for now to not break drivers.
Target is to merge [2] back at the beginning of next release cycle and
fix drivers accordingly.

[1]
Bugzilla ID: 1259

[2]
Fixes: 141a520b35f7 ("app/testpmd: fix primary process not polling all queues")
Cc: stable@dpdk.org

Signed-off-by: Ferruh Yigit <ferruh.yigit@amd.com>
---
Cc: haijie1@huawei.com
Cc: songx.jiale@intel.com
Cc: qiming.yang@intel.com
---
 app/test-pmd/testpmd.c                 | 20 ++++----------------
 doc/guides/rel_notes/release_23_07.rst |  9 +++++++++
 2 files changed, 13 insertions(+), 16 deletions(-)

diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c
index 1fc70650e0a4..c6ad9b18bf03 100644
--- a/app/test-pmd/testpmd.c
+++ b/app/test-pmd/testpmd.c
@@ -2424,13 +2424,6 @@ update_rx_queue_state(uint16_t port_id, uint16_t queue_id)
 		ports[port_id].rxq[queue_id].state =
 			rx_qinfo.queue_state;
 	} else if (rc == -ENOTSUP) {
-		/*
-		 * Do not change the rxq state for primary process
-		 * to ensure that the PMDs do not implement
-		 * rte_eth_rx_queue_info_get can forward as before.
-		 */
-		if (rte_eal_process_type() == RTE_PROC_PRIMARY)
-			return;
 		/*
 		 * Set the rxq state to RTE_ETH_QUEUE_STATE_STARTED
 		 * to ensure that the PMDs do not implement
@@ -2456,13 +2449,6 @@ update_tx_queue_state(uint16_t port_id, uint16_t queue_id)
 		ports[port_id].txq[queue_id].state =
 			tx_qinfo.queue_state;
 	} else if (rc == -ENOTSUP) {
-		/*
-		 * Do not change the txq state for primary process
-		 * to ensure that the PMDs do not implement
-		 * rte_eth_tx_queue_info_get can forward as before.
-		 */
-		if (rte_eal_process_type() == RTE_PROC_PRIMARY)
-			return;
 		/*
 		 * Set the txq state to RTE_ETH_QUEUE_STATE_STARTED
 		 * to ensure that the PMDs do not implement
@@ -2530,7 +2516,8 @@ start_packet_forwarding(int with_tx_first)
 		return;
 
 	if (stream_init != NULL) {
-		update_queue_state();
+		if (rte_eal_process_type() == RTE_PROC_SECONDARY)
+			update_queue_state();
 		for (i = 0; i < cur_fwd_config.nb_fwd_streams; i++)
 			stream_init(fwd_streams[i]);
 	}
@@ -3293,7 +3280,8 @@ start_port(portid_t pid)
 		pl[cfg_pi++] = pi;
 	}
 
-	update_queue_state();
+	if (rte_eal_process_type() == RTE_PROC_SECONDARY)
+		update_queue_state();
 
 	if (at_least_one_port_successfully_started && !no_link_check)
 		check_all_ports_link_status(RTE_PORT_ALL);
diff --git a/doc/guides/rel_notes/release_23_07.rst b/doc/guides/rel_notes/release_23_07.rst
index 7b1c31469fa5..46b3d915c6e4 100644
--- a/doc/guides/rel_notes/release_23_07.rst
+++ b/doc/guides/rel_notes/release_23_07.rst
@@ -280,6 +280,15 @@ Known Issues
    Also, make sure to start the actual text at the margin.
    =======================================================
 
+* **Testpmd is not forwarding on queues individually stopped.**
+
+  Testpmd forwards packets on started queues.
+  If a queue explicitly stopped, and later port stopped and started again,
+  the status of the previously stopped queue is not updated, so forwarding
+  is not working on those queues.
+
+  As a workaround start queues back explicitly, instead of port stop/start.
+
 
 Tested Platforms
 ----------------
-- 
2.34.1