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[net-next,1/2] net: dsa: mt7530: factor out bridge join/leave logic

Message ID 378bc964b49f9e9954336e99009932ac22bfe172.1718400508.git.mschiffer@universe-factory.net (mailing list archive)
State Superseded
Delegated to: Netdev Maintainers
Headers show
Series [net-next,1/2] net: dsa: mt7530: factor out bridge join/leave logic | expand

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netdev/series_format success Single patches do not need cover letters
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netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 845 this patch: 845
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers success CCed 15 of 15 maintainers
netdev/build_clang success Errors and warnings before: 849 this patch: 849
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 No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 849 this patch: 849
netdev/checkpatch warning WARNING: line length of 85 exceeds 80 columns
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0
netdev/contest success net-next-2024-06-16--18-00 (tests: 659)

Commit Message

Matthias Schiffer June 14, 2024, 10:21 p.m. UTC 
As preparation for implementing bridge port isolation, move the logic to
add and remove bits in the port matrix into a new helper
mt7530_update_port_member(), which is called from
mt7530_port_bridge_join() and mt7530_port_bridge_leave().

No functional change intended.

Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>
---
 drivers/net/dsa/mt7530.c | 103 +++++++++++++++++----------------------
 1 file changed, 46 insertions(+), 57 deletions(-)

Comments

Arınç ÜNAL June 16, 2024, 6:49 a.m. UTC | #1 
On 15/06/2024 01:21, Matthias Schiffer wrote:
> As preparation for implementing bridge port isolation, move the logic to
> add and remove bits in the port matrix into a new helper
> mt7530_update_port_member(), which is called from
> mt7530_port_bridge_join() and mt7530_port_bridge_leave().
> 
> No functional change intended.
> 
> Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>
> ---
>   drivers/net/dsa/mt7530.c | 103 +++++++++++++++++----------------------
>   1 file changed, 46 insertions(+), 57 deletions(-)
> 
> diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c
> index 598434d8d6e4..ecacaefdd694 100644
> --- a/drivers/net/dsa/mt7530.c
> +++ b/drivers/net/dsa/mt7530.c
> @@ -1302,6 +1302,50 @@ mt7530_stp_state_set(struct dsa_switch *ds, int port, u8 state)
>   		   FID_PST(FID_BRIDGED, stp_state));
>   }
>   
> +static void mt7530_update_port_member(struct mt7530_priv *priv, int port,
> +				      const struct net_device *bridge_dev, bool join)
> +	__must_hold(&priv->reg_mutex)

Please run git clang-format on the patch.

> +{
> +	struct dsa_port *dp = dsa_to_port(priv->ds, port), *other_dp;
> +	struct mt7530_port *p = &priv->ports[port], *other_p;
> +	struct dsa_port *cpu_dp = dp->cpu_dp;
> +	u32 port_bitmap = BIT(cpu_dp->index);
> +	int other_port;
> +
> +	dsa_switch_for_each_user_port(other_dp, priv->ds) {
> +		other_port = other_dp->index;
> +		other_p = &priv->ports[other_port];
> +
> +		if (dp == other_dp)
> +			continue;
> +
> +		/* Add/remove this port to/from the port matrix of the other
> +		 * ports in the same bridge. If the port is disabled, port
> +		 * matrix is kept and not being setup until the port becomes
> +		 * enabled.
> +		 */
> +		if (!dsa_port_offloads_bridge_dev(other_dp, bridge_dev))

Would be helpful to mention in the patch log that
dsa_port_offloads_bridge_dev() is now being used instead of
dsa_port_offloads_bridge().

> +			continue;
> +
> +		if (join) {
> +			other_p->pm |= PCR_MATRIX(BIT(port));
> +			port_bitmap |= BIT(other_port);
> +		} else {
> +			other_p->pm &= ~PCR_MATRIX(BIT(port));
> +		}
> +
> +		if (other_p->enable)
> +			mt7530_rmw(priv, MT7530_PCR_P(other_port),
> +				   PCR_MATRIX_MASK, other_p->pm);
> +	}
> +
> +	/* Add/remove the all other ports to this port matrix. */

I would add to this comment: When removing, only the CPU port will remain
in the port matrix of this port.

To not omit the original comment:

	/* Set the cpu port to be the only one in the port matrix of
	 * this port.
	 */

> +	p->pm = PCR_MATRIX(port_bitmap);
> +	if (priv->ports[port].enable)
> +		mt7530_rmw(priv, MT7530_PCR_P(port),
> +			   PCR_MATRIX_MASK, p->pm);

I see changes to have the code streamlined. Overall, I would appreciate a
more verbose patch log.

Arınç
diff mbox series

Patch

diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c
index 598434d8d6e4..ecacaefdd694 100644
--- a/drivers/net/dsa/mt7530.c
+++ b/drivers/net/dsa/mt7530.c
@@ -1302,6 +1302,50 @@  mt7530_stp_state_set(struct dsa_switch *ds, int port, u8 state)
 		   FID_PST(FID_BRIDGED, stp_state));
 }
 
+static void mt7530_update_port_member(struct mt7530_priv *priv, int port,
+				      const struct net_device *bridge_dev, bool join)
+	__must_hold(&priv->reg_mutex)
+{
+	struct dsa_port *dp = dsa_to_port(priv->ds, port), *other_dp;
+	struct mt7530_port *p = &priv->ports[port], *other_p;
+	struct dsa_port *cpu_dp = dp->cpu_dp;
+	u32 port_bitmap = BIT(cpu_dp->index);
+	int other_port;
+
+	dsa_switch_for_each_user_port(other_dp, priv->ds) {
+		other_port = other_dp->index;
+		other_p = &priv->ports[other_port];
+
+		if (dp == other_dp)
+			continue;
+
+		/* Add/remove this port to/from the port matrix of the other
+		 * ports in the same bridge. If the port is disabled, port
+		 * matrix is kept and not being setup until the port becomes
+		 * enabled.
+		 */
+		if (!dsa_port_offloads_bridge_dev(other_dp, bridge_dev))
+			continue;
+
+		if (join) {
+			other_p->pm |= PCR_MATRIX(BIT(port));
+			port_bitmap |= BIT(other_port);
+		} else {
+			other_p->pm &= ~PCR_MATRIX(BIT(port));
+		}
+
+		if (other_p->enable)
+			mt7530_rmw(priv, MT7530_PCR_P(other_port),
+				   PCR_MATRIX_MASK, other_p->pm);
+	}
+
+	/* Add/remove the all other ports to this port matrix. */
+	p->pm = PCR_MATRIX(port_bitmap);
+	if (priv->ports[port].enable)
+		mt7530_rmw(priv, MT7530_PCR_P(port),
+			   PCR_MATRIX_MASK, p->pm);
+}
+
 static int
 mt7530_port_pre_bridge_flags(struct dsa_switch *ds, int port,
 			     struct switchdev_brport_flags flags,
@@ -1345,39 +1389,11 @@  mt7530_port_bridge_join(struct dsa_switch *ds, int port,
 			struct dsa_bridge bridge, bool *tx_fwd_offload,
 			struct netlink_ext_ack *extack)
 {
-	struct dsa_port *dp = dsa_to_port(ds, port), *other_dp;
-	struct dsa_port *cpu_dp = dp->cpu_dp;
-	u32 port_bitmap = BIT(cpu_dp->index);
 	struct mt7530_priv *priv = ds->priv;
 
 	mutex_lock(&priv->reg_mutex);
 
-	dsa_switch_for_each_user_port(other_dp, ds) {
-		int other_port = other_dp->index;
-
-		if (dp == other_dp)
-			continue;
-
-		/* Add this port to the port matrix of the other ports in the
-		 * same bridge. If the port is disabled, port matrix is kept
-		 * and not being setup until the port becomes enabled.
-		 */
-		if (!dsa_port_offloads_bridge(other_dp, &bridge))
-			continue;
-
-		if (priv->ports[other_port].enable)
-			mt7530_set(priv, MT7530_PCR_P(other_port),
-				   PCR_MATRIX(BIT(port)));
-		priv->ports[other_port].pm |= PCR_MATRIX(BIT(port));
-
-		port_bitmap |= BIT(other_port);
-	}
-
-	/* Add the all other ports to this port matrix. */
-	if (priv->ports[port].enable)
-		mt7530_rmw(priv, MT7530_PCR_P(port),
-			   PCR_MATRIX_MASK, PCR_MATRIX(port_bitmap));
-	priv->ports[port].pm |= PCR_MATRIX(port_bitmap);
+	mt7530_update_port_member(priv, port, bridge.dev, true);
 
 	/* Set to fallback mode for independent VLAN learning */
 	mt7530_rmw(priv, MT7530_PCR_P(port), PCR_PORT_VLAN_MASK,
@@ -1478,38 +1494,11 @@  static void
 mt7530_port_bridge_leave(struct dsa_switch *ds, int port,
 			 struct dsa_bridge bridge)
 {
-	struct dsa_port *dp = dsa_to_port(ds, port), *other_dp;
-	struct dsa_port *cpu_dp = dp->cpu_dp;
 	struct mt7530_priv *priv = ds->priv;
 
 	mutex_lock(&priv->reg_mutex);
 
-	dsa_switch_for_each_user_port(other_dp, ds) {
-		int other_port = other_dp->index;
-
-		if (dp == other_dp)
-			continue;
-
-		/* Remove this port from the port matrix of the other ports
-		 * in the same bridge. If the port is disabled, port matrix
-		 * is kept and not being setup until the port becomes enabled.
-		 */
-		if (!dsa_port_offloads_bridge(other_dp, &bridge))
-			continue;
-
-		if (priv->ports[other_port].enable)
-			mt7530_clear(priv, MT7530_PCR_P(other_port),
-				     PCR_MATRIX(BIT(port)));
-		priv->ports[other_port].pm &= ~PCR_MATRIX(BIT(port));
-	}
-
-	/* Set the cpu port to be the only one in the port matrix of
-	 * this port.
-	 */
-	if (priv->ports[port].enable)
-		mt7530_rmw(priv, MT7530_PCR_P(port), PCR_MATRIX_MASK,
-			   PCR_MATRIX(BIT(cpu_dp->index)));
-	priv->ports[port].pm = PCR_MATRIX(BIT(cpu_dp->index));
+	mt7530_update_port_member(priv, port, bridge.dev, false);
 
 	/* When a port is removed from the bridge, the port would be set up
 	 * back to the default as is at initial boot which is a VLAN-unaware