patch 'net/ngbe: restrict configuration of VLAN strip offload' has been queued to stable release 21.11.9

[Kevin Traynor <ktraynor@redhat.com>]

Hi,

FYI, your patch has been queued to stable release 21.11.9

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 12/02/24. 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/kevintraynor/dpdk-stable

This queued commit can be viewed at:
https://github.com/kevintraynor/dpdk-stable/commit/2db3bc1f13cb2ff215febac5073e369d0a89242e

Thanks.

Kevin

---
From 2db3bc1f13cb2ff215febac5073e369d0a89242e Mon Sep 17 00:00:00 2001
From: Jiawen Wu <jiawenwu@trustnetic.com>
Date: Mon, 4 Nov 2024 10:30:07 +0800
Subject: [PATCH] net/ngbe: restrict configuration of VLAN strip offload

[ upstream commit baca8ec066dc6fdc42374e8eafd67eecfd6c9267 ]

There is a hardware limitation that Rx ring config register is not
writable when Rx ring is enabled, i.e. the NGBE_RXCFG_ENA bit is set.
But disabling the ring when there is traffic will cause ring get stuck.
So restrict the configuration of VLAN strip offload only if device is
started.

Fixes: 59b46438fdaa ("net/ngbe: support VLAN offload and VLAN filter")

Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>
---
 drivers/net/ngbe/ngbe_ethdev.c | 49 ++++++++++++++--------------------
 1 file changed, 20 insertions(+), 29 deletions(-)

diff --git a/drivers/net/ngbe/ngbe_ethdev.c b/drivers/net/ngbe/ngbe_ethdev.c
index a5854235dd..9e87653623 100644
--- a/drivers/net/ngbe/ngbe_ethdev.c
+++ b/drivers/net/ngbe/ngbe_ethdev.c
@@ -565,39 +565,23 @@ ngbe_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
 
 static void
-ngbe_vlan_strip_queue_set(struct rte_eth_dev *dev, uint16_t queue, int on)
+ngbe_vlan_strip_q_set(struct rte_eth_dev *dev, uint16_t queue, int on)
 {
-	struct ngbe_hw *hw = ngbe_dev_hw(dev);
-	struct ngbe_rx_queue *rxq;
-	bool restart;
-	uint32_t rxcfg, rxbal, rxbah;
-
 	if (on)
 		ngbe_vlan_hw_strip_enable(dev, queue);
 	else
 		ngbe_vlan_hw_strip_disable(dev, queue);
+}
 
-	rxq = dev->data->rx_queues[queue];
-	rxbal = rd32(hw, NGBE_RXBAL(rxq->reg_idx));
-	rxbah = rd32(hw, NGBE_RXBAH(rxq->reg_idx));
-	rxcfg = rd32(hw, NGBE_RXCFG(rxq->reg_idx));
-	if (rxq->offloads & RTE_ETH_RX_OFFLOAD_VLAN_STRIP) {
-		restart = (rxcfg & NGBE_RXCFG_ENA) &&
-			!(rxcfg & NGBE_RXCFG_VLAN);
-		rxcfg |= NGBE_RXCFG_VLAN;
-	} else {
-		restart = (rxcfg & NGBE_RXCFG_ENA) &&
-			(rxcfg & NGBE_RXCFG_VLAN);
-		rxcfg &= ~NGBE_RXCFG_VLAN;
-	}
-	rxcfg &= ~NGBE_RXCFG_ENA;
+static void
+ngbe_vlan_strip_queue_set(struct rte_eth_dev *dev, uint16_t queue, int on)
+{
+	struct ngbe_hw *hw = ngbe_dev_hw(dev);
 
-	if (restart) {
-		/* set vlan strip for ring */
-		ngbe_dev_rx_queue_stop(dev, queue);
-		wr32(hw, NGBE_RXBAL(rxq->reg_idx), rxbal);
-		wr32(hw, NGBE_RXBAH(rxq->reg_idx), rxbah);
-		wr32(hw, NGBE_RXCFG(rxq->reg_idx), rxcfg);
-		ngbe_dev_rx_queue_start(dev, queue);
+	if (!hw->adapter_stopped) {
+		PMD_DRV_LOG(ERR, "Please stop port first");
+		return;
 	}
+
+	ngbe_vlan_strip_q_set(dev, queue, on);
 }
 
@@ -825,7 +809,7 @@ ngbe_vlan_hw_strip_config(struct rte_eth_dev *dev)
 
 		if (rxq->offloads & RTE_ETH_RX_OFFLOAD_VLAN_STRIP)
-			ngbe_vlan_hw_strip_enable(dev, i);
+			ngbe_vlan_strip_q_set(dev, i, 1);
 		else
-			ngbe_vlan_hw_strip_disable(dev, i);
+			ngbe_vlan_strip_q_set(dev, i, 0);
 	}
 }
@@ -889,4 +873,11 @@ static int
 ngbe_vlan_offload_set(struct rte_eth_dev *dev, int mask)
 {
+	struct ngbe_hw *hw = ngbe_dev_hw(dev);
+
+	if (!hw->adapter_stopped && (mask & RTE_ETH_VLAN_STRIP_MASK)) {
+		PMD_DRV_LOG(ERR, "Please stop port first");
+		return -EPERM;
+	}
+
 	ngbe_config_vlan_strip_on_all_queues(dev, mask);
 
-- 
2.47.0

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2024-11-27 17:17:41.187823121 +0000
+++ 0093-net-ngbe-restrict-configuration-of-VLAN-strip-offloa.patch	2024-11-27 17:17:38.302269772 +0000
@@ -1 +1 @@
-From baca8ec066dc6fdc42374e8eafd67eecfd6c9267 Mon Sep 17 00:00:00 2001
+From 2db3bc1f13cb2ff215febac5073e369d0a89242e Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit baca8ec066dc6fdc42374e8eafd67eecfd6c9267 ]
+
@@ -13 +14,0 @@
-Cc: stable@dpdk.org
@@ -21 +22 @@
-index 325a9d1eaf..08e87471f6 100644
+index a5854235dd..9e87653623 100644
@@ -24 +25 @@
-@@ -587,39 +587,23 @@ ngbe_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
+@@ -565,39 +565,23 @@ ngbe_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
@@ -75 +76 @@
-@@ -847,7 +831,7 @@ ngbe_vlan_hw_strip_config(struct rte_eth_dev *dev)
+@@ -825,7 +809,7 @@ ngbe_vlan_hw_strip_config(struct rte_eth_dev *dev)
@@ -85 +86 @@
-@@ -911,4 +895,11 @@ static int
+@@ -889,4 +873,11 @@ static int