[dpdk-dev] [PATCH 4/6] net/hns3: fix DCB configuration

["Min Hu (Connor)" <humin29@huawei.com>]

From: Huisong Li <lihuisong@huawei.com>

Currently, the DCB configuration takes effect in the dev_start stage, and
the mapping between TCs and queues are also updated in this stage.
However, the DCB configuration is delivered in the dev_configure stage.
If the configuration fails, it should be intercepted in this stage. If the
configuration succeeds, the user should be able to obtain the
corresponding updated information, such as the mapping between TCs and
queues. So this patch moves DCB configuration to dev_configure.

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

Signed-off-by: Huisong Li <lihuisong@huawei.com>
Signed-off-by: Min Hu (Connor) <humin29@huawei.com>
---
 drivers/net/hns3/hns3_dcb.c    | 35 +++++---------------------
 drivers/net/hns3/hns3_dcb.h    |  2 +-
 drivers/net/hns3/hns3_ethdev.c | 56 +++++++++++++++++++++++-------------------
 3 files changed, 38 insertions(+), 55 deletions(-)

diff --git a/drivers/net/hns3/hns3_dcb.c b/drivers/net/hns3/hns3_dcb.c
index 8fcb284..1cb6adb 100644
--- a/drivers/net/hns3/hns3_dcb.c
+++ b/drivers/net/hns3/hns3_dcb.c
@@ -1615,8 +1615,7 @@ hns3_dcb_configure(struct hns3_adapter *hns)
 	int ret;
 
 	hns3_dcb_cfg_validate(hns, &num_tc, &map_changed);
-	if (map_changed ||
-	    __atomic_load_n(&hw->reset.resetting,  __ATOMIC_RELAXED)) {
+	if (map_changed) {
 		ret = hns3_dcb_info_update(hns, num_tc);
 		if (ret) {
 			hns3_err(hw, "dcb info update failed: %d", ret);
@@ -1712,14 +1711,18 @@ hns3_dcb_init(struct hns3_hw *hw)
 	return 0;
 }
 
-static int
+int
 hns3_update_queue_map_configure(struct hns3_adapter *hns)
 {
 	struct hns3_hw *hw = &hns->hw;
+	enum rte_eth_rx_mq_mode mq_mode = hw->data->dev_conf.rxmode.mq_mode;
 	uint16_t nb_rx_q = hw->data->nb_rx_queues;
 	uint16_t nb_tx_q = hw->data->nb_tx_queues;
 	int ret;
 
+	if ((uint32_t)mq_mode & ETH_MQ_RX_DCB_FLAG)
+		return 0;
+
 	ret = hns3_dcb_update_tc_queue_mapping(hw, nb_rx_q, nb_tx_q);
 	if (ret) {
 		hns3_err(hw, "failed to update tc queue mapping, ret = %d.",
@@ -1733,32 +1736,6 @@ hns3_update_queue_map_configure(struct hns3_adapter *hns)
 	return ret;
 }
 
-int
-hns3_dcb_cfg_update(struct hns3_adapter *hns)
-{
-	struct hns3_hw *hw = &hns->hw;
-	enum rte_eth_rx_mq_mode mq_mode = hw->data->dev_conf.rxmode.mq_mode;
-	int ret;
-
-	if ((uint32_t)mq_mode & ETH_MQ_RX_DCB_FLAG) {
-		ret = hns3_dcb_configure(hns);
-		if (ret)
-			hns3_err(hw, "Failed to config dcb: %d", ret);
-	} else {
-		/*
-		 * Update queue map without PFC configuration,
-		 * due to queues reconfigured by user.
-		 */
-		ret = hns3_update_queue_map_configure(hns);
-		if (ret)
-			hns3_err(hw,
-				 "Failed to update queue mapping configure: %d",
-				 ret);
-	}
-
-	return ret;
-}
-
 static void
 hns3_get_fc_mode(struct hns3_hw *hw, enum rte_eth_fc_mode mode)
 {
diff --git a/drivers/net/hns3/hns3_dcb.h b/drivers/net/hns3/hns3_dcb.h
index cd8d0b7..f378bd4 100644
--- a/drivers/net/hns3/hns3_dcb.h
+++ b/drivers/net/hns3/hns3_dcb.h
@@ -207,7 +207,7 @@ int hns3_dcb_pfc_enable(struct rte_eth_dev *dev,
 int hns3_queue_to_tc_mapping(struct hns3_hw *hw, uint16_t nb_rx_q,
 			     uint16_t nb_tx_q);
 
-int hns3_dcb_cfg_update(struct hns3_adapter *hns);
+int hns3_update_queue_map_configure(struct hns3_adapter *hns);
 int hns3_port_shaper_update(struct hns3_hw *hw, uint32_t speed);
 int hns3_pg_shaper_rate_cfg(struct hns3_hw *hw, uint8_t pg_id, uint32_t rate);
 int hns3_pri_shaper_rate_cfg(struct hns3_hw *hw, uint8_t tc_no, uint32_t rate);
diff --git a/drivers/net/hns3/hns3_ethdev.c b/drivers/net/hns3/hns3_ethdev.c
index f49f220..2049130 100644
--- a/drivers/net/hns3/hns3_ethdev.c
+++ b/drivers/net/hns3/hns3_ethdev.c
@@ -2274,24 +2274,6 @@ hns3_check_mq_mode(struct rte_eth_dev *dev)
 }
 
 static int
-hns3_check_dcb_cfg(struct rte_eth_dev *dev)
-{
-	struct hns3_hw *hw = HNS3_DEV_PRIVATE_TO_HW(dev->data->dev_private);
-
-	if (!hns3_dev_dcb_supported(hw)) {
-		hns3_err(hw, "this port does not support dcb configurations.");
-		return -EOPNOTSUPP;
-	}
-
-	if (hw->current_fc_status == HNS3_FC_STATUS_MAC_PAUSE) {
-		hns3_err(hw, "MAC pause enabled, cannot config dcb info.");
-		return -EOPNOTSUPP;
-	}
-
-	return 0;
-}
-
-static int
 hns3_bind_ring_with_vector(struct hns3_hw *hw, uint16_t vector_id, bool en,
 			   enum hns3_ring_type queue_type, uint16_t queue_id)
 {
@@ -2427,6 +2409,30 @@ hns3_refresh_mtu(struct rte_eth_dev *dev, struct rte_eth_conf *conf)
 }
 
 static int
+hns3_setup_dcb(struct rte_eth_dev *dev)
+{
+	struct hns3_adapter *hns = dev->data->dev_private;
+	struct hns3_hw *hw = &hns->hw;
+	int ret;
+
+	if (!hns3_dev_dcb_supported(hw)) {
+		hns3_err(hw, "this port does not support dcb configurations.");
+		return -EOPNOTSUPP;
+	}
+
+	if (hw->current_fc_status == HNS3_FC_STATUS_MAC_PAUSE) {
+		hns3_err(hw, "MAC pause enabled, cannot config dcb info.");
+		return -EOPNOTSUPP;
+	}
+
+	ret = hns3_dcb_configure(hns);
+	if (ret)
+		hns3_err(hw, "failed to config dcb: %d", ret);
+
+	return ret;
+}
+
+static int
 hns3_check_link_speed(struct hns3_hw *hw, uint32_t link_speeds)
 {
 	int ret;
@@ -2506,7 +2512,7 @@ hns3_dev_configure(struct rte_eth_dev *dev)
 		goto cfg_err;
 
 	if ((uint32_t)mq_mode & ETH_MQ_RX_DCB_FLAG) {
-		ret = hns3_check_dcb_cfg(dev);
+		ret = hns3_setup_dcb(dev);
 		if (ret)
 			goto cfg_err;
 	}
@@ -5574,14 +5580,14 @@ hns3_do_start(struct hns3_adapter *hns, bool reset_queue)
 	struct hns3_hw *hw = &hns->hw;
 	int ret;
 
-	ret = hns3_dcb_cfg_update(hns);
-	if (ret)
+	ret = hns3_update_queue_map_configure(hns);
+	if (ret) {
+		hns3_err(hw, "failed to update queue mapping configuration, ret = %d",
+			 ret);
 		return ret;
+	}
 
-	/*
-	 * The hns3_dcb_cfg_update may configure TM module, so
-	 * hns3_tm_conf_update must called later.
-	 */
+	/* Note: hns3_tm_conf_update must be called after configuring DCB. */
 	ret = hns3_tm_conf_update(hw);
 	if (ret) {
 		PMD_INIT_LOG(ERR, "failed to update tm conf, ret = %d.", ret);
-- 
2.7.4