[PATCH net v3 0/3] Wangxun fixes

[PATCH net v3 0/3] Wangxun fixes

[Jiawen Wu]

Fixed some bugs when using ethtool to operate network devices.

v2 -> v3:
- Drop the first patch.

v1 -> v2:
- Factor out the same code.
- Remove statistics printing with more than 64 queues.
- Detail the commit logs to describe issues.
- Remove reset flag check in wx_update_stats().
- Change to set VLAN CTAG and STAG to be consistent.

Jiawen Wu (3):
  net: wangxun: fix to change Rx features
  net: wangxun: match VLAN CTAG and STAG features
  net: txgbe: fix to control VLAN strip

 drivers/net/ethernet/wangxun/libwx/wx_hw.c    |  2 +
 drivers/net/ethernet/wangxun/libwx/wx_lib.c   | 56 +++++++++++++++++--
 drivers/net/ethernet/wangxun/libwx/wx_lib.h   |  2 +
 drivers/net/ethernet/wangxun/libwx/wx_type.h  | 22 ++++++++
 .../net/ethernet/wangxun/ngbe/ngbe_ethtool.c  | 18 ++++--
 drivers/net/ethernet/wangxun/ngbe/ngbe_main.c |  1 +
 .../ethernet/wangxun/txgbe/txgbe_ethtool.c    | 18 ++++--
 .../net/ethernet/wangxun/txgbe/txgbe_main.c   | 31 ++++++++++
 .../net/ethernet/wangxun/txgbe/txgbe_type.h   |  1 +
 9 files changed, 137 insertions(+), 14 deletions(-)

-- 
2.27.0

[PATCH net v3 1/3] net: wangxun: fix to change Rx features

[Jiawen Wu]

Fix the issue where some Rx features cannot be changed.

When using ethtool -K to turn off rx offload, it returns error and
displays "Could not change any device features". And netdev->features
is not assigned a new value to actually configure the hardware.

Fixes: 6dbedcffcf54 ("net: libwx: Implement xx_set_features ops")
Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>
Reviewed-by: Simon Horman <horms@kernel.org>
---
 drivers/net/ethernet/wangxun/libwx/wx_lib.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/wangxun/libwx/wx_lib.c b/drivers/net/ethernet/wangxun/libwx/wx_lib.c
index 6fae161cbcb8..667a5675998c 100644
--- a/drivers/net/ethernet/wangxun/libwx/wx_lib.c
+++ b/drivers/net/ethernet/wangxun/libwx/wx_lib.c
@@ -2690,12 +2690,14 @@ int wx_set_features(struct net_device *netdev, netdev_features_t features)
 		wx->rss_enabled = false;
 	}
 
+	netdev->features = features;
+
 	if (changed &
 	    (NETIF_F_HW_VLAN_CTAG_RX |
 	     NETIF_F_HW_VLAN_STAG_RX))
 		wx_set_rx_mode(netdev);
 
-	return 1;
+	return 0;
 }
 EXPORT_SYMBOL(wx_set_features);
 
-- 
2.27.0

[PATCH net v3 2/3] net: wangxun: match VLAN CTAG and STAG features

[Jiawen Wu]

Hardware requires VLAN CTAG and STAG configuration always matches. And
whether VLAN CTAG or STAG changes, the configuration needs to be changed
as well.

Fixes: 6670f1ece2c8 ("net: txgbe: Add netdev features support")
Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>
Reviewed-by: Sai Krishna <saikrishnag@marvell.com>
Reviewed-by: Simon Horman <horms@kernel.org>
---
 drivers/net/ethernet/wangxun/libwx/wx_lib.c   | 46 +++++++++++++++++++
 drivers/net/ethernet/wangxun/libwx/wx_lib.h   |  2 +
 drivers/net/ethernet/wangxun/ngbe/ngbe_main.c |  1 +
 .../net/ethernet/wangxun/txgbe/txgbe_main.c   |  1 +
 4 files changed, 50 insertions(+)

diff --git a/drivers/net/ethernet/wangxun/libwx/wx_lib.c b/drivers/net/ethernet/wangxun/libwx/wx_lib.c
index 667a5675998c..aefd78455468 100644
--- a/drivers/net/ethernet/wangxun/libwx/wx_lib.c
+++ b/drivers/net/ethernet/wangxun/libwx/wx_lib.c
@@ -2701,6 +2701,52 @@ int wx_set_features(struct net_device *netdev, netdev_features_t features)
 }
 EXPORT_SYMBOL(wx_set_features);
 
+netdev_features_t wx_fix_features(struct net_device *netdev,
+				  netdev_features_t features)
+{
+	netdev_features_t changed = netdev->features ^ features;
+
+	if (changed & NETIF_F_HW_VLAN_CTAG_FILTER) {
+		if (features & NETIF_F_HW_VLAN_CTAG_FILTER)
+			features |= NETIF_F_HW_VLAN_STAG_FILTER;
+		else
+			features &= ~NETIF_F_HW_VLAN_STAG_FILTER;
+	}
+	if (changed & NETIF_F_HW_VLAN_STAG_FILTER) {
+		if (features & NETIF_F_HW_VLAN_STAG_FILTER)
+			features |= NETIF_F_HW_VLAN_CTAG_FILTER;
+		else
+			features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
+	}
+	if (changed & NETIF_F_HW_VLAN_CTAG_RX) {
+		if (features & NETIF_F_HW_VLAN_CTAG_RX)
+			features |= NETIF_F_HW_VLAN_STAG_RX;
+		else
+			features &= ~NETIF_F_HW_VLAN_STAG_RX;
+	}
+	if (changed & NETIF_F_HW_VLAN_STAG_RX) {
+		if (features & NETIF_F_HW_VLAN_STAG_RX)
+			features |= NETIF_F_HW_VLAN_CTAG_RX;
+		else
+			features &= ~NETIF_F_HW_VLAN_CTAG_RX;
+	}
+	if (changed & NETIF_F_HW_VLAN_CTAG_TX) {
+		if (features & NETIF_F_HW_VLAN_CTAG_TX)
+			features |= NETIF_F_HW_VLAN_STAG_TX;
+		else
+			features &= ~NETIF_F_HW_VLAN_STAG_TX;
+	}
+	if (changed & NETIF_F_HW_VLAN_STAG_TX) {
+		if (features & NETIF_F_HW_VLAN_STAG_TX)
+			features |= NETIF_F_HW_VLAN_CTAG_TX;
+		else
+			features &= ~NETIF_F_HW_VLAN_CTAG_TX;
+	}
+
+	return features;
+}
+EXPORT_SYMBOL(wx_fix_features);
+
 void wx_set_ring(struct wx *wx, u32 new_tx_count,
 		 u32 new_rx_count, struct wx_ring *temp_ring)
 {
diff --git a/drivers/net/ethernet/wangxun/libwx/wx_lib.h b/drivers/net/ethernet/wangxun/libwx/wx_lib.h
index ec909e876720..c41b29ea812f 100644
--- a/drivers/net/ethernet/wangxun/libwx/wx_lib.h
+++ b/drivers/net/ethernet/wangxun/libwx/wx_lib.h
@@ -30,6 +30,8 @@ int wx_setup_resources(struct wx *wx);
 void wx_get_stats64(struct net_device *netdev,
 		    struct rtnl_link_stats64 *stats);
 int wx_set_features(struct net_device *netdev, netdev_features_t features);
+netdev_features_t wx_fix_features(struct net_device *netdev,
+				  netdev_features_t features);
 void wx_set_ring(struct wx *wx, u32 new_tx_count,
 		 u32 new_rx_count, struct wx_ring *temp_ring);
 
diff --git a/drivers/net/ethernet/wangxun/ngbe/ngbe_main.c b/drivers/net/ethernet/wangxun/ngbe/ngbe_main.c
index fdd6b4f70b7a..e894e01d030d 100644
--- a/drivers/net/ethernet/wangxun/ngbe/ngbe_main.c
+++ b/drivers/net/ethernet/wangxun/ngbe/ngbe_main.c
@@ -499,6 +499,7 @@ static const struct net_device_ops ngbe_netdev_ops = {
 	.ndo_start_xmit         = wx_xmit_frame,
 	.ndo_set_rx_mode        = wx_set_rx_mode,
 	.ndo_set_features       = wx_set_features,
+	.ndo_fix_features       = wx_fix_features,
 	.ndo_validate_addr      = eth_validate_addr,
 	.ndo_set_mac_address    = wx_set_mac,
 	.ndo_get_stats64        = wx_get_stats64,
diff --git a/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c b/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c
index bd4624d14ca0..b3c0058b045d 100644
--- a/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c
+++ b/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c
@@ -428,6 +428,7 @@ static const struct net_device_ops txgbe_netdev_ops = {
 	.ndo_start_xmit         = wx_xmit_frame,
 	.ndo_set_rx_mode        = wx_set_rx_mode,
 	.ndo_set_features       = wx_set_features,
+	.ndo_fix_features       = wx_fix_features,
 	.ndo_validate_addr      = eth_validate_addr,
 	.ndo_set_mac_address    = wx_set_mac,
 	.ndo_get_stats64        = wx_get_stats64,
-- 
2.27.0

Re: [PATCH net v3 2/3] net: wangxun: match VLAN CTAG and STAG features

[Jakub Kicinski]

On Fri, 10 May 2024 14:17:50 +0800 Jiawen Wu wrote:
> Hardware requires VLAN CTAG and STAG configuration always matches. And
> whether VLAN CTAG or STAG changes, the configuration needs to be changed
> as well.

With this patch the resulting configuration will depend on the order of
actions. Basically the features will be disable if the last action is
either stag or ctag disable. This may cause to subtle bugs if some
refactoring changes the order of enable and disable.

It'd be better to turn both features on if _either_ feature was
requested. And require that _both_ are disabled before disabling.
-- 
pw-bot: cr

[PATCH net v3 3/3] net: txgbe: fix to control VLAN strip

[Jiawen Wu]

When VLAN tag strip is changed to enable or disable, the hardware requires
the Rx ring to be in a disabled state, otherwise the feature cannot be
changed.

Fixes: f3b03c655f67 ("net: wangxun: Implement vlan add and kill functions")
Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>
Reviewed-by: Simon Horman <horms@kernel.org>
---
 drivers/net/ethernet/wangxun/libwx/wx_hw.c    |  2 ++
 drivers/net/ethernet/wangxun/libwx/wx_lib.c   |  6 ++--
 drivers/net/ethernet/wangxun/libwx/wx_type.h  | 22 ++++++++++++++
 .../net/ethernet/wangxun/ngbe/ngbe_ethtool.c  | 18 +++++++----
 .../ethernet/wangxun/txgbe/txgbe_ethtool.c    | 18 +++++++----
 .../net/ethernet/wangxun/txgbe/txgbe_main.c   | 30 +++++++++++++++++++
 .../net/ethernet/wangxun/txgbe/txgbe_type.h   |  1 +
 7 files changed, 84 insertions(+), 13 deletions(-)

diff --git a/drivers/net/ethernet/wangxun/libwx/wx_hw.c b/drivers/net/ethernet/wangxun/libwx/wx_hw.c
index 945c13d1a982..c09a6f744575 100644
--- a/drivers/net/ethernet/wangxun/libwx/wx_hw.c
+++ b/drivers/net/ethernet/wangxun/libwx/wx_hw.c
@@ -1958,6 +1958,8 @@ int wx_sw_init(struct wx *wx)
 		return -ENOMEM;
 	}
 
+	bitmap_zero(wx->state, WX_STATE_NBITS);
+
 	return 0;
 }
 EXPORT_SYMBOL(wx_sw_init);
diff --git a/drivers/net/ethernet/wangxun/libwx/wx_lib.c b/drivers/net/ethernet/wangxun/libwx/wx_lib.c
index aefd78455468..ed6a168ff136 100644
--- a/drivers/net/ethernet/wangxun/libwx/wx_lib.c
+++ b/drivers/net/ethernet/wangxun/libwx/wx_lib.c
@@ -2692,9 +2692,9 @@ int wx_set_features(struct net_device *netdev, netdev_features_t features)
 
 	netdev->features = features;
 
-	if (changed &
-	    (NETIF_F_HW_VLAN_CTAG_RX |
-	     NETIF_F_HW_VLAN_STAG_RX))
+	if (wx->mac.type == wx_mac_sp && changed & NETIF_F_HW_VLAN_CTAG_RX)
+		wx->do_reset(netdev);
+	else if (changed & (NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_HW_VLAN_CTAG_FILTER))
 		wx_set_rx_mode(netdev);
 
 	return 0;
diff --git a/drivers/net/ethernet/wangxun/libwx/wx_type.h b/drivers/net/ethernet/wangxun/libwx/wx_type.h
index 1fdeb464d5f4..5aaf7b1fa2db 100644
--- a/drivers/net/ethernet/wangxun/libwx/wx_type.h
+++ b/drivers/net/ethernet/wangxun/libwx/wx_type.h
@@ -982,8 +982,13 @@ struct wx_hw_stats {
 	u64 qmprc;
 };
 
+enum wx_state {
+	WX_STATE_RESETTING,
+	WX_STATE_NBITS,		/* must be last */
+};
 struct wx {
 	unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
+	DECLARE_BITMAP(state, WX_STATE_NBITS);
 
 	void *priv;
 	u8 __iomem *hw_addr;
@@ -1071,6 +1076,8 @@ struct wx {
 	u64 hw_csum_rx_good;
 	u64 hw_csum_rx_error;
 	u64 alloc_rx_buff_failed;
+
+	void (*do_reset)(struct net_device *netdev);
 };
 
 #define WX_INTR_ALL (~0ULL)
@@ -1131,4 +1138,19 @@ static inline struct wx *phylink_to_wx(struct phylink_config *config)
 	return container_of(config, struct wx, phylink_config);
 }
 
+static inline int wx_set_state_reset(struct wx *wx)
+{
+	u8 timeout = 50;
+
+	while (test_and_set_bit(WX_STATE_RESETTING, wx->state)) {
+		timeout--;
+		if (!timeout)
+			return -EBUSY;
+
+		usleep_range(1000, 2000);
+	}
+
+	return 0;
+}
+
 #endif /* _WX_TYPE_H_ */
diff --git a/drivers/net/ethernet/wangxun/ngbe/ngbe_ethtool.c b/drivers/net/ethernet/wangxun/ngbe/ngbe_ethtool.c
index 786a652ae64f..46a5a3e95202 100644
--- a/drivers/net/ethernet/wangxun/ngbe/ngbe_ethtool.c
+++ b/drivers/net/ethernet/wangxun/ngbe/ngbe_ethtool.c
@@ -52,7 +52,7 @@ static int ngbe_set_ringparam(struct net_device *netdev,
 	struct wx *wx = netdev_priv(netdev);
 	u32 new_rx_count, new_tx_count;
 	struct wx_ring *temp_ring;
-	int i;
+	int i, err = 0;
 
 	new_tx_count = clamp_t(u32, ring->tx_pending, WX_MIN_TXD, WX_MAX_TXD);
 	new_tx_count = ALIGN(new_tx_count, WX_REQ_TX_DESCRIPTOR_MULTIPLE);
@@ -64,6 +64,10 @@ static int ngbe_set_ringparam(struct net_device *netdev,
 	    new_rx_count == wx->rx_ring_count)
 		return 0;
 
+	err = wx_set_state_reset(wx);
+	if (err)
+		return err;
+
 	if (!netif_running(wx->netdev)) {
 		for (i = 0; i < wx->num_tx_queues; i++)
 			wx->tx_ring[i]->count = new_tx_count;
@@ -72,14 +76,16 @@ static int ngbe_set_ringparam(struct net_device *netdev,
 		wx->tx_ring_count = new_tx_count;
 		wx->rx_ring_count = new_rx_count;
 
-		return 0;
+		goto clear_reset;
 	}
 
 	/* allocate temporary buffer to store rings in */
 	i = max_t(int, wx->num_tx_queues, wx->num_rx_queues);
 	temp_ring = kvmalloc_array(i, sizeof(struct wx_ring), GFP_KERNEL);
-	if (!temp_ring)
-		return -ENOMEM;
+	if (!temp_ring) {
+		err = -ENOMEM;
+		goto clear_reset;
+	}
 
 	ngbe_down(wx);
 
@@ -89,7 +95,9 @@ static int ngbe_set_ringparam(struct net_device *netdev,
 	wx_configure(wx);
 	ngbe_up(wx);
 
-	return 0;
+clear_reset:
+	clear_bit(WX_STATE_RESETTING, wx->state);
+	return err;
 }
 
 static int ngbe_set_channels(struct net_device *dev,
diff --git a/drivers/net/ethernet/wangxun/txgbe/txgbe_ethtool.c b/drivers/net/ethernet/wangxun/txgbe/txgbe_ethtool.c
index db675512ce4d..31fde3fa7c6b 100644
--- a/drivers/net/ethernet/wangxun/txgbe/txgbe_ethtool.c
+++ b/drivers/net/ethernet/wangxun/txgbe/txgbe_ethtool.c
@@ -19,7 +19,7 @@ static int txgbe_set_ringparam(struct net_device *netdev,
 	struct wx *wx = netdev_priv(netdev);
 	u32 new_rx_count, new_tx_count;
 	struct wx_ring *temp_ring;
-	int i;
+	int i, err = 0;
 
 	new_tx_count = clamp_t(u32, ring->tx_pending, WX_MIN_TXD, WX_MAX_TXD);
 	new_tx_count = ALIGN(new_tx_count, WX_REQ_TX_DESCRIPTOR_MULTIPLE);
@@ -31,6 +31,10 @@ static int txgbe_set_ringparam(struct net_device *netdev,
 	    new_rx_count == wx->rx_ring_count)
 		return 0;
 
+	err = wx_set_state_reset(wx);
+	if (err)
+		return err;
+
 	if (!netif_running(wx->netdev)) {
 		for (i = 0; i < wx->num_tx_queues; i++)
 			wx->tx_ring[i]->count = new_tx_count;
@@ -39,14 +43,16 @@ static int txgbe_set_ringparam(struct net_device *netdev,
 		wx->tx_ring_count = new_tx_count;
 		wx->rx_ring_count = new_rx_count;
 
-		return 0;
+		goto clear_reset;
 	}
 
 	/* allocate temporary buffer to store rings in */
 	i = max_t(int, wx->num_tx_queues, wx->num_rx_queues);
 	temp_ring = kvmalloc_array(i, sizeof(struct wx_ring), GFP_KERNEL);
-	if (!temp_ring)
-		return -ENOMEM;
+	if (!temp_ring) {
+		err = -ENOMEM;
+		goto clear_reset;
+	}
 
 	txgbe_down(wx);
 
@@ -55,7 +61,9 @@ static int txgbe_set_ringparam(struct net_device *netdev,
 
 	txgbe_up(wx);
 
-	return 0;
+clear_reset:
+	clear_bit(WX_STATE_RESETTING, wx->state);
+	return err;
 }
 
 static int txgbe_set_channels(struct net_device *dev,
diff --git a/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c b/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c
index b3c0058b045d..8c7a74981b90 100644
--- a/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c
+++ b/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c
@@ -269,6 +269,8 @@ static int txgbe_sw_init(struct wx *wx)
 	wx->tx_work_limit = TXGBE_DEFAULT_TX_WORK;
 	wx->rx_work_limit = TXGBE_DEFAULT_RX_WORK;
 
+	wx->do_reset = txgbe_do_reset;
+
 	return 0;
 }
 
@@ -421,6 +423,34 @@ int txgbe_setup_tc(struct net_device *dev, u8 tc)
 	return 0;
 }
 
+static void txgbe_reinit_locked(struct wx *wx)
+{
+	int err = 0;
+
+	netif_trans_update(wx->netdev);
+
+	err = wx_set_state_reset(wx);
+	if (err) {
+		wx_err(wx, "wait device reset timeout\n");
+		return;
+	}
+
+	txgbe_down(wx);
+	txgbe_up(wx);
+
+	clear_bit(WX_STATE_RESETTING, wx->state);
+}
+
+void txgbe_do_reset(struct net_device *netdev)
+{
+	struct wx *wx = netdev_priv(netdev);
+
+	if (netif_running(netdev))
+		txgbe_reinit_locked(wx);
+	else
+		txgbe_reset(wx);
+}
+
 static const struct net_device_ops txgbe_netdev_ops = {
 	.ndo_open               = txgbe_open,
 	.ndo_stop               = txgbe_close,
diff --git a/drivers/net/ethernet/wangxun/txgbe/txgbe_type.h b/drivers/net/ethernet/wangxun/txgbe/txgbe_type.h
index 1b4ff50d5857..f434a7865cb7 100644
--- a/drivers/net/ethernet/wangxun/txgbe/txgbe_type.h
+++ b/drivers/net/ethernet/wangxun/txgbe/txgbe_type.h
@@ -134,6 +134,7 @@ extern char txgbe_driver_name[];
 void txgbe_down(struct wx *wx);
 void txgbe_up(struct wx *wx);
 int txgbe_setup_tc(struct net_device *dev, u8 tc);
+void txgbe_do_reset(struct net_device *netdev);
 
 #define NODE_PROP(_NAME, _PROP)			\
 	(const struct software_node) {		\
-- 
2.27.0