From e74722646fa7b51d82812be26e8ae24a5010f9da Mon Sep 17 00:00:00 2001
From: Jie Hai <haijie1@huawei.com>
Date: Wed, 6 Mar 2024 17:20:47 +0800
Subject: [PATCH 31/33] net/hns3: enable PFC for all user priorities

[ upstream commit aae6989df36c105b917cf69975c075dfde2e6b84 ]

When user set TC number to 4 and enable PFC and ETS by dev_configure,
driver only enable user priority 0-3.
The packet with user priority 4-7 cannot trigger PFC frame.

Fix by enabling PFC for all user priorities.

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 2831d3d..915e4eb 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);
-- 
2.33.0

