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generic: 6.6: mt7530: add support for bridge port isolation

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Import patches accepted upstream introducing port isolation feature
on MT7530 switches:
  - [net-next,v3,1/2] net: dsa: mt7530: factor out bridge join/leave logic
    https://git.kernel.org/netdev/net-next/c/c25c961fc7f3
  - [net-next,v3,2/2] net: dsa: mt7530: add support for bridge port isolation
    https://git.kernel.org/netdev/net-next/c/3d49ee2127c2

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
This commit is contained in:
Daniel Golle 2024-06-19 13:33:23 +01:00
parent a09a72d86d
commit c4e6a147a6
2 changed files with 255 additions and 0 deletions
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176
target/linux/generic/backport-6.6/790-55-v6.11-net-dsa-mt7530-factor-out-bridge-join-leave-logic.patch Normal file
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@ -0,0 +1,176 @@
From c25c961fc7f36682f0a530150f1b7453ebc344cd Mon Sep 17 00:00:00 2001
From: Matthias Schiffer <mschiffer@universe-factory.net>
Date: Tue, 18 Jun 2024 09:17:12 +0200
Subject: [PATCH 1/2] net: dsa: mt7530: factor out bridge join/leave logic
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
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().
Another part of the preparation is using dsa_port_offloads_bridge_dev()
instead of dsa_port_offloads_bridge() to check for bridge membership, as
we don't have a struct dsa_bridge in mt7530_port_bridge_flags().
The port matrix setting is slightly streamlined, now always first setting
the mt7530_port's pm field and then writing the port matrix from that
field into the hardware register, instead of duplicating the bit
manipulation for both the struct field and the register.
mt7530_port_bridge_join() was previously using |= to update the port
matrix with the port bitmap, which was unnecessary, as pm would only
have the CPU port set before joining a bridge; a simple assignment can
be used for both joining and leaving (and will also work when individual
bits are added/removed in port_bitmap with regard to the previous port
matrix, which is what happens with port isolation).
No functional change intended.
Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>
Reviewed-by: Wojciech Drewek <wojciech.drewek@intel.com>
Reviewed-by: Arınç ÜNAL <arinc.unal@arinc9.com>
Tested-by: Arınç ÜNAL <arinc.unal@arinc9.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/dsa/mt7530.c | 105 ++++++++++++++++++---------------------
1 file changed, 48 insertions(+), 57 deletions(-)
--- a/drivers/net/dsa/mt7530.c
+++ b/drivers/net/dsa/mt7530.c
@@ -1302,6 +1302,52 @@ mt7530_stp_state_set(struct dsa_switch *
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. For !join
+ * (leaving the bridge), only the CPU port will remain 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);
+}
+
static int
mt7530_port_pre_bridge_flags(struct dsa_switch *ds, int port,
struct switchdev_brport_flags flags,
@@ -1345,39 +1391,11 @@ mt7530_port_bridge_join(struct dsa_switc
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 +1496,11 @@ 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

79
target/linux/generic/backport-6.6/790-56-v6.11-net-dsa-mt7530-add-support-for-bridge-port-isolation.patch Normal file
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@ -0,0 +1,79 @@
From 3d49ee2127c26fd2c77944fd2e3168c057f99439 Mon Sep 17 00:00:00 2001
From: Matthias Schiffer <mschiffer@universe-factory.net>
Date: Tue, 18 Jun 2024 09:17:13 +0200
Subject: [PATCH 2/2] net: dsa: mt7530: add support for bridge port isolation
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Remove a pair of ports from the port matrix when both ports have the
isolated flag set.
Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>
Reviewed-by: Wojciech Drewek <wojciech.drewek@intel.com>
Reviewed-by: Arınç ÜNAL <arinc.unal@arinc9.com>
Tested-by: Arınç ÜNAL <arinc.unal@arinc9.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/dsa/mt7530.c | 18 ++++++++++++++++--
drivers/net/dsa/mt7530.h | 1 +
2 files changed, 17 insertions(+), 2 deletions(-)
--- a/drivers/net/dsa/mt7530.c
+++ b/drivers/net/dsa/mt7530.c
@@ -1311,6 +1311,7 @@ static void mt7530_update_port_member(st
struct dsa_port *cpu_dp = dp->cpu_dp;
u32 port_bitmap = BIT(cpu_dp->index);
int other_port;
+ bool isolated;
dsa_switch_for_each_user_port(other_dp, priv->ds) {
other_port = other_dp->index;
@@ -1327,7 +1328,9 @@ static void mt7530_update_port_member(st
if (!dsa_port_offloads_bridge_dev(other_dp, bridge_dev))
continue;
- if (join) {
+ isolated = p->isolated && other_p->isolated;
+
+ if (join && !isolated) {
other_p->pm |= PCR_MATRIX(BIT(port));
port_bitmap |= BIT(other_port);
} else {
@@ -1354,7 +1357,7 @@ mt7530_port_pre_bridge_flags(struct dsa_
struct netlink_ext_ack *extack)
{
if (flags.mask & ~(BR_LEARNING | BR_FLOOD | BR_MCAST_FLOOD |
- BR_BCAST_FLOOD))
+ BR_BCAST_FLOOD | BR_ISOLATED))
return -EINVAL;
return 0;
@@ -1383,6 +1386,17 @@ mt7530_port_bridge_flags(struct dsa_swit
mt7530_rmw(priv, MT753X_MFC, BC_FFP(BIT(port)),
flags.val & BR_BCAST_FLOOD ? BC_FFP(BIT(port)) : 0);
+ if (flags.mask & BR_ISOLATED) {
+ struct dsa_port *dp = dsa_to_port(ds, port);
+ struct net_device *bridge_dev = dsa_port_bridge_dev_get(dp);
+
+ priv->ports[port].isolated = !!(flags.val & BR_ISOLATED);
+
+ mutex_lock(&priv->reg_mutex);
+ mt7530_update_port_member(priv, port, bridge_dev, true);
+ mutex_unlock(&priv->reg_mutex);
+ }
+
return 0;
}
--- a/drivers/net/dsa/mt7530.h
+++ b/drivers/net/dsa/mt7530.h
@@ -721,6 +721,7 @@ struct mt7530_fdb {
*/
struct mt7530_port {
bool enable;
+ bool isolated;
u32 pm;
u16 pvid;
struct phylink_pcs *sgmii_pcs;