diff mbox series

[net,v2,4/4] net: txgbe: fix to control VLAN strip

Message ID 20240429102519.25096-5-jiawenwu@trustnetic.com (mailing list archive)
State Superseded
Delegated to: Netdev Maintainers
Headers show
Series Wangxun fixes | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag present in non-next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 926 this patch: 926
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers warning 1 maintainers not CCed: maciej.fijalkowski@intel.com
netdev/build_clang success Errors and warnings before: 937 this patch: 937
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success Fixes tag looks correct
netdev/build_allmodconfig_warn success Errors and warnings before: 937 this patch: 937
netdev/checkpatch warning WARNING: line length of 83 exceeds 80 columns
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 42 this patch: 42
netdev/source_inline success Was 0 now: 0
netdev/contest success net-next-2024-04-29--15-00 (tests: 994)

Commit Message

Jiawen Wu April 29, 2024, 10:25 a.m. UTC 
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>
---
 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(-)

Comments

Simon Horman May 2, 2024, 9:25 a.m. UTC | #1 
On Mon, Apr 29, 2024 at 06:25:19PM +0800, Jiawen Wu wrote:
> 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>
> ---
>  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;

Hi Jiawen Wu,

NETIF_F_HW_VLAN_CTAG_RX appears in both the "if" and "if else" condition.
Should "if else" be changed to "if" ?

...
Jiawen Wu May 9, 2024, 3:08 a.m. UTC | #2 
> > 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;
> 
> Hi Jiawen Wu,
> 
> NETIF_F_HW_VLAN_CTAG_RX appears in both the "if" and "if else" condition.
> Should "if else" be changed to "if" ?

There are 4 cases where wx_set_rx_mode() is called, CTAG_RX and CTAG_FILTER
combined with wx_mac_sp and wx_mac_em. But only one special case that
changing CTAG_RX requires wx_mac_sp device to do reset, and wx_set_rx_mode()
also will be called during the reset process. So I think "if else" is more appropriate
here.
Simon Horman May 9, 2024, 1:38 p.m. UTC | #3 
On Thu, May 09, 2024 at 11:08:46AM +0800, Jiawen Wu wrote:
> > > 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;
> > 
> > Hi Jiawen Wu,
> > 
> > NETIF_F_HW_VLAN_CTAG_RX appears in both the "if" and "if else" condition.
> > Should "if else" be changed to "if" ?
> 
> There are 4 cases where wx_set_rx_mode() is called, CTAG_RX and CTAG_FILTER
> combined with wx_mac_sp and wx_mac_em. But only one special case that
> changing CTAG_RX requires wx_mac_sp device to do reset, and wx_set_rx_mode()
> also will be called during the reset process. So I think "if else" is more appropriate
> here.

Hi Jiawen Wu,

Thanks for your response.

Looking over this again it seems that I misread the code the first time
around. And i think that the current if ... else if ...  construction is
fine. Sorry for the noise.

Reviewed-by: Simon Horman <horms@kernel.org>
diff mbox series

Patch

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) {		\