[dpdk-stable] patch 'net/hns3: fix requested FC mode rollback' has been queued to stable release 19.11.9

[Christian Ehrhardt]

Hi,

FYI, your patch has been queued to stable release 19.11.9

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 06/12/21. So please
shout if anyone has objections.

Also note that after the patch there's a diff of the upstream commit vs the
patch applied to the branch. This will indicate if there was any rebasing
needed to apply to the stable branch. If there were code changes for rebasing
(ie: not only metadata diffs), please double check that the rebase was
correctly done.

Queued patches are on a temporary branch at:
https://github.com/cpaelzer/dpdk-stable-queue

This queued commit can be viewed at:
https://github.com/cpaelzer/dpdk-stable-queue/commit/a93f977dc081895ca2f1482092878d1af38e44bb

Thanks.

Christian Ehrhardt <christian.ehrhardt at canonical.com>

---
>From a93f977dc081895ca2f1482092878d1af38e44bb Mon Sep 17 00:00:00 2001
From: Huisong Li <lihuisong at huawei.com>
Date: Sat, 15 May 2021 08:52:34 +0800
Subject: [PATCH] net/hns3: fix requested FC mode rollback

[ upstream commit 19603f63fbb77f6ceddce9d36d20a6f5d7cdd4cf ]

Currently, the "requested_fc_mode" lacks rollback when enabling link
FC or PFC fails.
For example, this may result an incorrect FC mode after a reset.

Fixes: d4fdb71a0e7b ("net/hns3: fix flow control mode")
Fixes: 62e3ccc2b94c ("net/hns3: support flow control")

Signed-off-by: Huisong Li <lihuisong at huawei.com>
Signed-off-by: Min Hu (Connor) <humin29 at huawei.com>
---
 drivers/net/hns3/hns3_dcb.c    | 30 ++++++++++++++++++++++++++++++
 drivers/net/hns3/hns3_ethdev.c | 28 ----------------------------
 2 files changed, 30 insertions(+), 28 deletions(-)

diff --git a/drivers/net/hns3/hns3_dcb.c b/drivers/net/hns3/hns3_dcb.c
index 612c826e40..0da1a87659 100644
--- a/drivers/net/hns3/hns3_dcb.c
+++ b/drivers/net/hns3/hns3_dcb.c
@@ -1593,6 +1593,30 @@ hns3_dcb_cfg_update(struct hns3_adapter *hns)
 	return ret;
 }
 
+static void
+hns3_get_fc_mode(struct hns3_hw *hw, enum rte_eth_fc_mode mode)
+{
+	switch (mode) {
+	case RTE_FC_NONE:
+		hw->requested_fc_mode = HNS3_FC_NONE;
+		break;
+	case RTE_FC_RX_PAUSE:
+		hw->requested_fc_mode = HNS3_FC_RX_PAUSE;
+		break;
+	case RTE_FC_TX_PAUSE:
+		hw->requested_fc_mode = HNS3_FC_TX_PAUSE;
+		break;
+	case RTE_FC_FULL:
+		hw->requested_fc_mode = HNS3_FC_FULL;
+		break;
+	default:
+		hw->requested_fc_mode = HNS3_FC_NONE;
+		hns3_warn(hw, "fc_mode(%u) exceeds member scope and is "
+			  "configured to RTE_FC_NONE", mode);
+		break;
+	}
+}
+
 /*
  * hns3_dcb_pfc_enable - Enable priority flow control
  * @dev: pointer to ethernet device
@@ -1605,6 +1629,7 @@ hns3_dcb_pfc_enable(struct rte_eth_dev *dev, struct rte_eth_pfc_conf *pfc_conf)
 	struct hns3_hw *hw = HNS3_DEV_PRIVATE_TO_HW(dev->data->dev_private);
 	struct hns3_pf *pf = HNS3_DEV_PRIVATE_TO_PF(dev->data->dev_private);
 	enum hns3_fc_status fc_status = hw->current_fc_status;
+	enum hns3_fc_mode old_fc_mode = hw->requested_fc_mode;
 	uint8_t hw_pfc_map = hw->dcb_info.hw_pfc_map;
 	uint8_t pfc_en = hw->dcb_info.pfc_en;
 	uint8_t priority = pfc_conf->priority;
@@ -1612,6 +1637,7 @@ hns3_dcb_pfc_enable(struct rte_eth_dev *dev, struct rte_eth_pfc_conf *pfc_conf)
 	int ret, status;
 
 	pf->pause_time = pfc_conf->fc.pause_time;
+	hns3_get_fc_mode(hw, pfc_conf->fc.mode);
 	hw->current_fc_status = HNS3_FC_STATUS_PFC;
 	hw->dcb_info.pfc_en |= BIT(priority);
 	hw->dcb_info.hw_pfc_map =
@@ -1633,6 +1659,7 @@ hns3_dcb_pfc_enable(struct rte_eth_dev *dev, struct rte_eth_pfc_conf *pfc_conf)
 	return 0;
 
 pfc_setup_fail:
+	hw->requested_fc_mode = old_fc_mode;
 	hw->current_fc_status = fc_status;
 	pf->pause_time = pause_time;
 	hw->dcb_info.pfc_en = pfc_en;
@@ -1655,11 +1682,13 @@ hns3_fc_enable(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
 {
 	struct hns3_hw *hw = HNS3_DEV_PRIVATE_TO_HW(dev->data->dev_private);
 	struct hns3_pf *pf = HNS3_DEV_PRIVATE_TO_PF(dev->data->dev_private);
+	enum hns3_fc_mode old_fc_mode = hw->requested_fc_mode;
 	enum hns3_fc_status fc_status = hw->current_fc_status;
 	uint16_t pause_time = pf->pause_time;
 	int ret;
 
 	pf->pause_time = fc_conf->pause_time;
+	hns3_get_fc_mode(hw, fc_conf->mode);
 
 	/*
 	 * In fact, current_fc_status is HNS3_FC_STATUS_NONE when mode
@@ -1679,6 +1708,7 @@ hns3_fc_enable(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
 	return 0;
 
 setup_fc_fail:
+	hw->requested_fc_mode = old_fc_mode;
 	hw->current_fc_status = fc_status;
 	pf->pause_time = pause_time;
 
diff --git a/drivers/net/hns3/hns3_ethdev.c b/drivers/net/hns3/hns3_ethdev.c
index 02276c82fd..ac82e0b5ef 100644
--- a/drivers/net/hns3/hns3_ethdev.c
+++ b/drivers/net/hns3/hns3_ethdev.c
@@ -4817,30 +4817,6 @@ hns3_flow_ctrl_get(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
 	return 0;
 }
 
-static void
-hns3_get_fc_mode(struct hns3_hw *hw, enum rte_eth_fc_mode mode)
-{
-	switch (mode) {
-	case RTE_FC_NONE:
-		hw->requested_fc_mode = HNS3_FC_NONE;
-		break;
-	case RTE_FC_RX_PAUSE:
-		hw->requested_fc_mode = HNS3_FC_RX_PAUSE;
-		break;
-	case RTE_FC_TX_PAUSE:
-		hw->requested_fc_mode = HNS3_FC_TX_PAUSE;
-		break;
-	case RTE_FC_FULL:
-		hw->requested_fc_mode = HNS3_FC_FULL;
-		break;
-	default:
-		hw->requested_fc_mode = HNS3_FC_NONE;
-		hns3_warn(hw, "fc_mode(%u) exceeds member scope and is "
-			  "configured to RTE_FC_NONE", mode);
-		break;
-	}
-}
-
 static int
 hns3_flow_ctrl_set(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
 {
@@ -4878,8 +4854,6 @@ hns3_flow_ctrl_set(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
 		return -EOPNOTSUPP;
 	}
 
-	hns3_get_fc_mode(hw, fc_conf->mode);
-
 	rte_spinlock_lock(&hw->lock);
 	ret = hns3_fc_enable(dev, fc_conf);
 	rte_spinlock_unlock(&hw->lock);
@@ -4926,8 +4900,6 @@ hns3_priority_flow_ctrl_set(struct rte_eth_dev *dev,
 		return -EOPNOTSUPP;
 	}
 
-	hns3_get_fc_mode(hw, pfc_conf->fc.mode);
-
 	rte_spinlock_lock(&hw->lock);
 	ret = hns3_dcb_pfc_enable(dev, pfc_conf);
 	rte_spinlock_unlock(&hw->lock);
-- 
2.31.1

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2021-06-10 14:05:00.266829889 +0200
+++ 0047-net-hns3-fix-requested-FC-mode-rollback.patch	2021-06-10 14:04:58.098024880 +0200
@@ -1 +1 @@
-From 19603f63fbb77f6ceddce9d36d20a6f5d7cdd4cf Mon Sep 17 00:00:00 2001
+From a93f977dc081895ca2f1482092878d1af38e44bb Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit 19603f63fbb77f6ceddce9d36d20a6f5d7cdd4cf ]
+
@@ -12 +13,0 @@
-Cc: stable at dpdk.org
@@ -22 +23 @@
-index ab307f1f54..bea41156a4 100644
+index 612c826e40..0da1a87659 100644
@@ -25 +26 @@
-@@ -1760,6 +1760,30 @@ hns3_dcb_cfg_update(struct hns3_adapter *hns)
+@@ -1593,6 +1593,30 @@ hns3_dcb_cfg_update(struct hns3_adapter *hns)
@@ -56 +57 @@
-@@ -1772,6 +1796,7 @@ hns3_dcb_pfc_enable(struct rte_eth_dev *dev, struct rte_eth_pfc_conf *pfc_conf)
+@@ -1605,6 +1629,7 @@ hns3_dcb_pfc_enable(struct rte_eth_dev *dev, struct rte_eth_pfc_conf *pfc_conf)
@@ -64 +65 @@
-@@ -1779,6 +1804,7 @@ hns3_dcb_pfc_enable(struct rte_eth_dev *dev, struct rte_eth_pfc_conf *pfc_conf)
+@@ -1612,6 +1637,7 @@ hns3_dcb_pfc_enable(struct rte_eth_dev *dev, struct rte_eth_pfc_conf *pfc_conf)
@@ -72 +73 @@
-@@ -1800,6 +1826,7 @@ hns3_dcb_pfc_enable(struct rte_eth_dev *dev, struct rte_eth_pfc_conf *pfc_conf)
+@@ -1633,6 +1659,7 @@ hns3_dcb_pfc_enable(struct rte_eth_dev *dev, struct rte_eth_pfc_conf *pfc_conf)
@@ -80 +81 @@
-@@ -1822,11 +1849,13 @@ hns3_fc_enable(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
+@@ -1655,11 +1682,13 @@ hns3_fc_enable(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
@@ -94 +95 @@
-@@ -1846,6 +1875,7 @@ hns3_fc_enable(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
+@@ -1679,6 +1708,7 @@ hns3_fc_enable(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
@@ -103 +104 @@
-index 0589e3f10a..f49f220062 100644
+index 02276c82fd..ac82e0b5ef 100644
@@ -106 +107 @@
-@@ -6059,30 +6059,6 @@ hns3_flow_ctrl_get(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
+@@ -4817,30 +4817,6 @@ hns3_flow_ctrl_get(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
@@ -135 +136 @@
- hns3_check_fc_autoneg_valid(struct hns3_hw *hw, uint8_t autoneg)
+ hns3_flow_ctrl_set(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
@@ -137 +138 @@
-@@ -6156,8 +6132,6 @@ hns3_flow_ctrl_set(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
+@@ -4878,8 +4854,6 @@ hns3_flow_ctrl_set(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
@@ -146 +147 @@
-@@ -6204,8 +6178,6 @@ hns3_priority_flow_ctrl_set(struct rte_eth_dev *dev,
+@@ -4926,8 +4900,6 @@ hns3_priority_flow_ctrl_set(struct rte_eth_dev *dev,