[PATCH 0/2] two bugfix for testpmd DCB

[PATCH 0/2] two bugfix for testpmd DCB

[Chengwen Feng]

Two bugfix which found when enhance testpmd DCB function.

Chengwen Feng (2):
  app/testpmd: fix invalid txp when setup DCB forward
  app/testpmd: fix wrong Rx queues when setup DCB forward

 app/test-pmd/config.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

-- 
2.17.1

[PATCH 1/2] app/testpmd: fix invalid txp when setup DCB forward

[Chengwen Feng]

The txp maybe invalid (e.g. start with only one port but set with 1),
this commit fix it by get txp from fwd_topology_tx_port_get() function.

An added benefit is that the DCB test also supports '--port-topology'
parameter.

Fixes: 1a572499beb6 ("app/testpmd: setup DCB forwarding based on traffic class")
Cc: stable@dpdk.org

Signed-off-by: Chengwen Feng <fengchengwen@huawei.com>
---
 app/test-pmd/config.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/app/test-pmd/config.c b/app/test-pmd/config.c
index 3ce2a14a1b..0f687018c7 100644
--- a/app/test-pmd/config.c
+++ b/app/test-pmd/config.c
@@ -5187,7 +5187,7 @@ dcb_fwd_config_setup(void)
 	/* reinitialize forwarding streams */
 	init_fwd_streams();
 	sm_id = 0;
-	txp = 1;
+	txp = fwd_topology_tx_port_get(rxp);
 	/* get the dcb info on the first RX and TX ports */
 	(void)rte_eth_dev_get_dcb_info(fwd_ports_ids[rxp], &rxp_dcb_info);
 	(void)rte_eth_dev_get_dcb_info(fwd_ports_ids[txp], &txp_dcb_info);
@@ -5235,11 +5235,8 @@ dcb_fwd_config_setup(void)
 			rxp++;
 		if (rxp >= nb_fwd_ports)
 			return;
+		txp = fwd_topology_tx_port_get(rxp);
 		/* get the dcb information on next RX and TX ports */
-		if ((rxp & 0x1) == 0)
-			txp = (portid_t) (rxp + 1);
-		else
-			txp = (portid_t) (rxp - 1);
 		rte_eth_dev_get_dcb_info(fwd_ports_ids[rxp], &rxp_dcb_info);
 		rte_eth_dev_get_dcb_info(fwd_ports_ids[txp], &txp_dcb_info);
 	}
-- 
2.17.1

[PATCH 2/2] app/testpmd: fix wrong Rx queues when setup DCB forward

[Chengwen Feng]

The nb_rx_queue should get from rxp_dcb_info not txp_dcb_info, this
commit fix it.

Fixes: 1a572499beb6 ("app/testpmd: setup DCB forwarding based on traffic class")
Cc: stable@dpdk.org

Signed-off-by: Chengwen Feng <fengchengwen@huawei.com>
---
 app/test-pmd/config.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/app/test-pmd/config.c b/app/test-pmd/config.c
index 0f687018c7..8557371488 100644
--- a/app/test-pmd/config.c
+++ b/app/test-pmd/config.c
@@ -5205,7 +5205,7 @@ dcb_fwd_config_setup(void)
 				fwd_lcores[lc_id]->stream_idx;
 			rxq = rxp_dcb_info.tc_queue.tc_rxq[i][tc].base;
 			txq = txp_dcb_info.tc_queue.tc_txq[i][tc].base;
-			nb_rx_queue = txp_dcb_info.tc_queue.tc_rxq[i][tc].nb_queue;
+			nb_rx_queue = rxp_dcb_info.tc_queue.tc_rxq[i][tc].nb_queue;
 			nb_tx_queue = txp_dcb_info.tc_queue.tc_txq[i][tc].nb_queue;
 			for (j = 0; j < nb_rx_queue; j++) {
 				struct fwd_stream *fs;
-- 
2.17.1

Re: [PATCH 0/2] two bugfix for testpmd DCB

[Stephen Hemminger]

On Thu, 6 Nov 2025 08:29:18 +0800
Chengwen Feng <fengchengwen@huawei.com> wrote:

> Two bugfix which found when enhance testpmd DCB function.
> 
> Chengwen Feng (2):
>   app/testpmd: fix invalid txp when setup DCB forward
>   app/testpmd: fix wrong Rx queues when setup DCB forward
> 
>  app/test-pmd/config.c | 9 +++------
>  1 file changed, 3 insertions(+), 6 deletions(-)
> 

Queued to next-net