[PATCH] net/hns3: fix user priority 4-7 didn't enable PFC

[PATCH] net/hns3: fix user priority 4-7 didn't enable PFC

[Jie Hai]

Currently, hns3 driver only enable user priority 0-3 when the
user set TC number to 4 and enable PFC and ETS by dev_configure.
In this moment, the packet with user priority 4-7 cannot trigger
PFC frame. By the way, the nb_tcs from user can never be 0 because
of the ahead check in driver. So remove this redundant code.

Fixes: 62e3ccc2b94c ("net/hns3: support flow control")
Cc: stable@dpdk.org

Signed-off-by: Jie Hai <haijie1@huawei.com>
---
 drivers/net/hns3/hns3_dcb.c | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/drivers/net/hns3/hns3_dcb.c b/drivers/net/hns3/hns3_dcb.c
index 2831d3dc6205..915e4eb76817 100644
--- a/drivers/net/hns3/hns3_dcb.c
+++ b/drivers/net/hns3/hns3_dcb.c
@@ -1499,7 +1499,6 @@ hns3_dcb_info_update(struct hns3_adapter *hns, uint8_t num_tc)
 static int
 hns3_dcb_hw_configure(struct hns3_adapter *hns)
 {
-	struct rte_eth_dcb_rx_conf *dcb_rx_conf;
 	struct hns3_pf *pf = &hns->pf;
 	struct hns3_hw *hw = &hns->hw;
 	enum hns3_fc_status fc_status = hw->current_fc_status;
@@ -1519,12 +1518,8 @@ hns3_dcb_hw_configure(struct hns3_adapter *hns)
 	}
 
 	if (hw->data->dev_conf.dcb_capability_en & RTE_ETH_DCB_PFC_SUPPORT) {
-		dcb_rx_conf = &hw->data->dev_conf.rx_adv_conf.dcb_rx_conf;
-		if (dcb_rx_conf->nb_tcs == 0)
-			hw->dcb_info.pfc_en = 1; /* tc0 only */
-		else
-			hw->dcb_info.pfc_en =
-			RTE_LEN2MASK((uint8_t)dcb_rx_conf->nb_tcs, uint8_t);
+		hw->dcb_info.pfc_en =
+			RTE_LEN2MASK((uint8_t)HNS3_MAX_USER_PRIO, uint8_t);
 
 		hw->dcb_info.hw_pfc_map =
 				hns3_dcb_undrop_tc_map(hw, hw->dcb_info.pfc_en);
-- 
2.30.0

Re: [PATCH] net/hns3: fix user priority 4-7 didn't enable PFC

[Ferruh Yigit]

On 3/6/2024 9:20 AM, Jie Hai wrote:
> Currently, hns3 driver only enable user priority 0-3 when the
> user set TC number to 4 and enable PFC and ETS by dev_configure.
> In this moment, the packet with user priority 4-7 cannot trigger
> PFC frame. By the way, the nb_tcs from user can never be 0 because
> of the ahead check in driver. So remove this redundant code.
> 
> Fixes: 62e3ccc2b94c ("net/hns3: support flow control")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Jie Hai <haijie1@huawei.com>
>

Applied to dpdk-next-net/main, thanks.