[RFC PATCH net-next 6/6] net: dsa: eliminate dsa_switch_ops :: port_bridge_tx_fwd_{,un}offload
From: Vladimir Oltean <vladimir.oltean@nxp.com>
Date: 2021-10-26 16:27:25
Subsystem:
arrow speedchips xrs7000 series ethernet switch driver, broadcom b53/sf2 ethernet switch driver, hirschmann hellcreek ethernet switch driver, marvell 88e6xxx ethernet switch fabric driver, mediatek switch driver, microchip ksz series ethernet switch driver, networking drivers, networking [dsa], networking [general], ocelot ethernet switch driver, the rest · Maintainers:
George McCollister, Florian Fainelli, Jonas Gorski, Kurt Kanzenbach, Andrew Lunn, Chester A. Unal, Daniel Golle, Woojung Huh, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Vladimir Oltean, Vladimir Oltean, Linus Torvalds
We don't really need new switch API for these, and with new switches which intend to add support for this feature, it will become cumbersome to maintain. Simply pass a boolean argument to ->port_bridge_join which the driver must set to true if it implements the TX forwarding offload feature. Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> --- drivers/net/dsa/b53/b53_common.c | 3 +- drivers/net/dsa/b53/b53_priv.h | 3 +- drivers/net/dsa/dsa_loop.c | 3 +- drivers/net/dsa/hirschmann/hellcreek.c | 3 +- drivers/net/dsa/lan9303-core.c | 3 +- drivers/net/dsa/lantiq_gswip.c | 3 +- drivers/net/dsa/microchip/ksz_common.c | 3 +- drivers/net/dsa/microchip/ksz_common.h | 2 +- drivers/net/dsa/mt7530.c | 2 +- drivers/net/dsa/mv88e6xxx/chip.c | 71 ++++++++++++-------------- drivers/net/dsa/ocelot/felix.c | 2 +- drivers/net/dsa/qca8k.c | 3 +- drivers/net/dsa/rtl8366rb.c | 3 +- drivers/net/dsa/sja1105/sja1105_main.c | 22 ++++++-- drivers/net/dsa/xrs700x/xrs700x.c | 2 +- include/net/dsa.h | 10 ++-- net/dsa/dsa_priv.h | 1 + net/dsa/port.c | 39 ++------------ net/dsa/switch.c | 3 +- 19 files changed, 81 insertions(+), 100 deletions(-)
diff --git a/drivers/net/dsa/b53/b53_common.c b/drivers/net/dsa/b53/b53_common.c
index 4e41b1a63108..3867f3d4545f 100644
--- a/drivers/net/dsa/b53/b53_common.c
+++ b/drivers/net/dsa/b53/b53_common.c@@ -1860,7 +1860,8 @@ int b53_mdb_del(struct dsa_switch *ds, int port, } EXPORT_SYMBOL(b53_mdb_del); -int b53_br_join(struct dsa_switch *ds, int port, struct dsa_bridge bridge) +int b53_br_join(struct dsa_switch *ds, int port, struct dsa_bridge bridge, + bool *tx_fwd_offload) { struct b53_device *dev = ds->priv; s8 cpu_port = dsa_to_port(ds, port)->cpu_dp->index;
diff --git a/drivers/net/dsa/b53/b53_priv.h b/drivers/net/dsa/b53/b53_priv.h
index ee17f8b516ca..b41dc8ac2ca8 100644
--- a/drivers/net/dsa/b53/b53_priv.h
+++ b/drivers/net/dsa/b53/b53_priv.h@@ -324,7 +324,8 @@ void b53_get_strings(struct dsa_switch *ds, int port, u32 stringset, void b53_get_ethtool_stats(struct dsa_switch *ds, int port, uint64_t *data); int b53_get_sset_count(struct dsa_switch *ds, int port, int sset); void b53_get_ethtool_phy_stats(struct dsa_switch *ds, int port, uint64_t *data); -int b53_br_join(struct dsa_switch *ds, int port, struct dsa_bridge bridge); +int b53_br_join(struct dsa_switch *ds, int port, struct dsa_bridge bridge, + bool *tx_fwd_offload); void b53_br_leave(struct dsa_switch *ds, int port, struct dsa_bridge bridge); void b53_br_set_stp_state(struct dsa_switch *ds, int port, u8 state); void b53_br_fast_age(struct dsa_switch *ds, int port);
diff --git a/drivers/net/dsa/dsa_loop.c b/drivers/net/dsa/dsa_loop.c
index 70db3a9aa355..33daaf10c488 100644
--- a/drivers/net/dsa/dsa_loop.c
+++ b/drivers/net/dsa/dsa_loop.c@@ -167,7 +167,8 @@ static int dsa_loop_phy_write(struct dsa_switch *ds, int port, } static int dsa_loop_port_bridge_join(struct dsa_switch *ds, int port, - struct dsa_bridge bridge) + struct dsa_bridge bridge, + bool *tx_fwd_offload) { dev_dbg(ds->dev, "%s: port: %d, bridge: %s\n", __func__, port, bridge.dev->name);
diff --git a/drivers/net/dsa/hirschmann/hellcreek.c b/drivers/net/dsa/hirschmann/hellcreek.c
index 17c2d13670a9..53ab5f8ae92e 100644
--- a/drivers/net/dsa/hirschmann/hellcreek.c
+++ b/drivers/net/dsa/hirschmann/hellcreek.c@@ -674,7 +674,8 @@ static int hellcreek_bridge_flags(struct dsa_switch *ds, int port, } static int hellcreek_port_bridge_join(struct dsa_switch *ds, int port, - struct dsa_bridge bridge) + struct dsa_bridge bridge, + bool *tx_fwd_offload) { struct hellcreek *hellcreek = ds->priv;
diff --git a/drivers/net/dsa/lan9303-core.c b/drivers/net/dsa/lan9303-core.c
index 29d909484275..d55784d19fa4 100644
--- a/drivers/net/dsa/lan9303-core.c
+++ b/drivers/net/dsa/lan9303-core.c@@ -1103,7 +1103,8 @@ static void lan9303_port_disable(struct dsa_switch *ds, int port) } static int lan9303_port_bridge_join(struct dsa_switch *ds, int port, - struct dsa_bridge bridge) + struct dsa_bridge bridge, + bool *tx_fwd_offload) { struct lan9303 *chip = ds->priv;
diff --git a/drivers/net/dsa/lantiq_gswip.c b/drivers/net/dsa/lantiq_gswip.c
index 6b9b9c712e58..6b5bef7f2a59 100644
--- a/drivers/net/dsa/lantiq_gswip.c
+++ b/drivers/net/dsa/lantiq_gswip.c@@ -1146,7 +1146,8 @@ static int gswip_vlan_remove(struct gswip_priv *priv, } static int gswip_port_bridge_join(struct dsa_switch *ds, int port, - struct dsa_bridge bridge) + struct dsa_bridge bridge, + bool *tx_fwd_offload) { struct net_device *br = bridge.dev; struct gswip_priv *priv = ds->priv;
diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c
index 23784d14a5da..1d13aa56e7d1 100644
--- a/drivers/net/dsa/microchip/ksz_common.c
+++ b/drivers/net/dsa/microchip/ksz_common.c@@ -173,7 +173,8 @@ void ksz_get_ethtool_stats(struct dsa_switch *ds, int port, uint64_t *buf) EXPORT_SYMBOL_GPL(ksz_get_ethtool_stats); int ksz_port_bridge_join(struct dsa_switch *ds, int port, - struct dsa_bridge bridge) + struct dsa_bridge bridge, + bool *tx_fwd_offload) { struct ksz_device *dev = ds->priv;
diff --git a/drivers/net/dsa/microchip/ksz_common.h b/drivers/net/dsa/microchip/ksz_common.h
index df953c2bc56e..b444df218c2d 100644
--- a/drivers/net/dsa/microchip/ksz_common.h
+++ b/drivers/net/dsa/microchip/ksz_common.h@@ -159,7 +159,7 @@ void ksz_mac_link_down(struct dsa_switch *ds, int port, unsigned int mode, int ksz_sset_count(struct dsa_switch *ds, int port, int sset); void ksz_get_ethtool_stats(struct dsa_switch *ds, int port, uint64_t *buf); int ksz_port_bridge_join(struct dsa_switch *ds, int port, - struct dsa_bridge bridge); + struct dsa_bridge bridge, bool *tx_fwd_offload); void ksz_port_bridge_leave(struct dsa_switch *ds, int port, struct dsa_bridge bridge); void ksz_port_fast_age(struct dsa_switch *ds, int port);
diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c
index 85cc5aca7f96..dcd1a3932cfb 100644
--- a/drivers/net/dsa/mt7530.c
+++ b/drivers/net/dsa/mt7530.c@@ -1186,7 +1186,7 @@ mt7530_port_bridge_flags(struct dsa_switch *ds, int port, static int mt7530_port_bridge_join(struct dsa_switch *ds, int port, - struct dsa_bridge bridge) + struct dsa_bridge bridge, bool *tx_fwd_offload) { struct mt7530_priv *priv = ds->priv; u32 port_bitmap = BIT(MT7530_CPU_PORT);
diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index 73613a667f6c..0aac71dece29 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c@@ -2448,8 +2448,27 @@ static int mv88e6xxx_bridge_map(struct mv88e6xxx_chip *chip, return 0; } +/* Treat the software bridge as a virtual single-port switch behind the + * CPU and map in the PVT. First dst->last_switch elements are taken by + * physical switches, so start from beyond that range. + */ +static int mv88e6xxx_map_virtual_bridge_to_pvt(struct dsa_switch *ds, + unsigned int bridge_num) +{ + u8 dev = bridge_num + ds->dst->last_switch; + struct mv88e6xxx_chip *chip = ds->priv; + int err; + + mv88e6xxx_reg_lock(chip); + err = mv88e6xxx_pvt_map(chip, dev, 0); + mv88e6xxx_reg_unlock(chip); + + return err; +} + static int mv88e6xxx_port_bridge_join(struct dsa_switch *ds, int port, - struct dsa_bridge bridge) + struct dsa_bridge bridge, + bool *tx_fwd_offload) { struct mv88e6xxx_chip *chip = ds->priv; int err;
@@ -2464,6 +2483,14 @@ static int mv88e6xxx_port_bridge_join(struct dsa_switch *ds, int port, if (err) goto unlock; + if (mv88e6xxx_has_pvt(chip)) { + err = mv88e6xxx_map_virtual_bridge_to_pvt(ds, bridge.num); + if (err) + goto unlock; + + *tx_fwd_offload = true; + } + unlock: mv88e6xxx_reg_unlock(chip);
@@ -2478,6 +2505,10 @@ static void mv88e6xxx_port_bridge_leave(struct dsa_switch *ds, int port, mv88e6xxx_reg_lock(chip); + if (bridge.tx_fwd_offload && + mv88e6xxx_map_virtual_bridge_to_pvt(ds, bridge.num)) + dev_err(ds->dev, "failed to remap cross-chip Port VLAN\n"); + if (mv88e6xxx_bridge_map(chip, bridge) || mv88e6xxx_port_vlan_map(chip, port)) dev_err(ds->dev, "failed to remap in-chip Port VLAN\n");
@@ -2523,42 +2554,6 @@ static void mv88e6xxx_crosschip_bridge_leave(struct dsa_switch *ds, mv88e6xxx_reg_unlock(chip); } -/* Treat the software bridge as a virtual single-port switch behind the - * CPU and map in the PVT. First dst->last_switch elements are taken by - * physical switches, so start from beyond that range. - */ -static int mv88e6xxx_map_virtual_bridge_to_pvt(struct dsa_switch *ds, - unsigned int bridge_num) -{ - u8 dev = bridge_num + ds->dst->last_switch; - struct mv88e6xxx_chip *chip = ds->priv; - int err; - - mv88e6xxx_reg_lock(chip); - err = mv88e6xxx_pvt_map(chip, dev, 0); - mv88e6xxx_reg_unlock(chip); - - return err; -} - -static int mv88e6xxx_bridge_tx_fwd_offload(struct dsa_switch *ds, int port, - struct dsa_bridge bridge) -{ - return mv88e6xxx_map_virtual_bridge_to_pvt(ds, bridge.num); -} - -static void mv88e6xxx_bridge_tx_fwd_unoffload(struct dsa_switch *ds, int port, - struct dsa_bridge bridge) -{ - int err; - - err = mv88e6xxx_map_virtual_bridge_to_pvt(ds, bridge.num); - if (err) { - dev_err(ds->dev, "failed to remap cross-chip Port VLAN: %pe\n", - ERR_PTR(err)); - } -} - static int mv88e6xxx_software_reset(struct mv88e6xxx_chip *chip) { if (chip->info->ops->reset)
@@ -6278,8 +6273,6 @@ static const struct dsa_switch_ops mv88e6xxx_switch_ops = { .crosschip_lag_change = mv88e6xxx_crosschip_lag_change, .crosschip_lag_join = mv88e6xxx_crosschip_lag_join, .crosschip_lag_leave = mv88e6xxx_crosschip_lag_leave, - .port_bridge_tx_fwd_offload = mv88e6xxx_bridge_tx_fwd_offload, - .port_bridge_tx_fwd_unoffload = mv88e6xxx_bridge_tx_fwd_unoffload, }; static int mv88e6xxx_register_switch(struct mv88e6xxx_chip *chip)
diff --git a/drivers/net/dsa/ocelot/felix.c b/drivers/net/dsa/ocelot/felix.c
index 8cf82fa91a6b..001213891b91 100644
--- a/drivers/net/dsa/ocelot/felix.c
+++ b/drivers/net/dsa/ocelot/felix.c@@ -698,7 +698,7 @@ static int felix_bridge_flags(struct dsa_switch *ds, int port, } static int felix_bridge_join(struct dsa_switch *ds, int port, - struct dsa_bridge bridge) + struct dsa_bridge bridge, bool *tx_fwd_offload) { struct ocelot *ocelot = ds->priv;
diff --git a/drivers/net/dsa/qca8k.c b/drivers/net/dsa/qca8k.c
index 3ae10f22ada9..390dad77f062 100644
--- a/drivers/net/dsa/qca8k.c
+++ b/drivers/net/dsa/qca8k.c@@ -1729,7 +1729,8 @@ qca8k_port_stp_state_set(struct dsa_switch *ds, int port, u8 state) } static int qca8k_port_bridge_join(struct dsa_switch *ds, int port, - struct dsa_bridge bridge) + struct dsa_bridge bridge, + bool *tx_fwd_offload) { struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv; int port_mask, cpu_port;
diff --git a/drivers/net/dsa/rtl8366rb.c b/drivers/net/dsa/rtl8366rb.c
index fac2333a3f5e..ecc19bd5115f 100644
--- a/drivers/net/dsa/rtl8366rb.c
+++ b/drivers/net/dsa/rtl8366rb.c@@ -1186,7 +1186,8 @@ rtl8366rb_port_disable(struct dsa_switch *ds, int port) static int rtl8366rb_port_bridge_join(struct dsa_switch *ds, int port, - struct dsa_bridge bridge) + struct dsa_bridge bridge, + bool *tx_fwd_offload) { struct realtek_smi *smi = ds->priv; unsigned int port_bitmap = 0;
diff --git a/drivers/net/dsa/sja1105/sja1105_main.c b/drivers/net/dsa/sja1105/sja1105_main.c
index 24584fe2e760..cefde41ce8d6 100644
--- a/drivers/net/dsa/sja1105/sja1105_main.c
+++ b/drivers/net/dsa/sja1105/sja1105_main.c@@ -2074,14 +2074,30 @@ static void sja1105_bridge_stp_state_set(struct dsa_switch *ds, int port, } static int sja1105_bridge_join(struct dsa_switch *ds, int port, - struct dsa_bridge bridge) + struct dsa_bridge bridge, + bool *tx_fwd_offload) { - return sja1105_bridge_member(ds, port, bridge, true); + int rc; + + rc = sja1105_bridge_member(ds, port, bridge, true); + if (rc) + return rc; + + rc = dsa_tag_8021q_bridge_tx_fwd_offload(ds, port, bridge); + if (rc) { + sja1105_bridge_member(ds, port, bridge, false); + return rc; + } + + *tx_fwd_offload = true; + + return 0; } static void sja1105_bridge_leave(struct dsa_switch *ds, int port, struct dsa_bridge bridge) { + dsa_tag_8021q_bridge_tx_fwd_unoffload(ds, port, bridge); sja1105_bridge_member(ds, port, bridge, false); }
@@ -3230,8 +3246,6 @@ static const struct dsa_switch_ops sja1105_switch_ops = { .tag_8021q_vlan_add = sja1105_dsa_8021q_vlan_add, .tag_8021q_vlan_del = sja1105_dsa_8021q_vlan_del, .port_prechangeupper = sja1105_prechangeupper, - .port_bridge_tx_fwd_offload = dsa_tag_8021q_bridge_tx_fwd_offload, - .port_bridge_tx_fwd_unoffload = dsa_tag_8021q_bridge_tx_fwd_unoffload, }; static const struct of_device_id sja1105_dt_ids[];
diff --git a/drivers/net/dsa/xrs700x/xrs700x.c b/drivers/net/dsa/xrs700x/xrs700x.c
index ebb55dfd9c4e..35fa19ddaf19 100644
--- a/drivers/net/dsa/xrs700x/xrs700x.c
+++ b/drivers/net/dsa/xrs700x/xrs700x.c@@ -540,7 +540,7 @@ static int xrs700x_bridge_common(struct dsa_switch *ds, int port, } static int xrs700x_bridge_join(struct dsa_switch *ds, int port, - struct dsa_bridge bridge) + struct dsa_bridge bridge, bool *tx_fwd_offload) { return xrs700x_bridge_common(ds, port, bridge, true); }
diff --git a/include/net/dsa.h b/include/net/dsa.h
index 5e83c64bc96a..94dc8b5ee9c8 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h@@ -222,6 +222,7 @@ struct dsa_mall_tc_entry { struct dsa_bridge { struct net_device *dev; unsigned int num; + bool tx_fwd_offload; refcount_t refcount; };
@@ -814,15 +815,10 @@ struct dsa_switch_ops { */ int (*set_ageing_time)(struct dsa_switch *ds, unsigned int msecs); int (*port_bridge_join)(struct dsa_switch *ds, int port, - struct dsa_bridge bridge); + struct dsa_bridge bridge, + bool *tx_fwd_offload); void (*port_bridge_leave)(struct dsa_switch *ds, int port, struct dsa_bridge bridge); - /* Called right after .port_bridge_join() */ - int (*port_bridge_tx_fwd_offload)(struct dsa_switch *ds, int port, - struct dsa_bridge bridge); - /* Called right before .port_bridge_leave() */ - void (*port_bridge_tx_fwd_unoffload)(struct dsa_switch *ds, int port, - struct dsa_bridge bridge); void (*port_stp_state_set)(struct dsa_switch *ds, int port, u8 state); void (*port_fast_age)(struct dsa_switch *ds, int port);
diff --git a/net/dsa/dsa_priv.h b/net/dsa/dsa_priv.h
index 489712ead08f..5abe6864967a 100644
--- a/net/dsa/dsa_priv.h
+++ b/net/dsa/dsa_priv.h@@ -56,6 +56,7 @@ struct dsa_notifier_bridge_info { int tree_index; int sw_index; int port; + bool tx_fwd_offload; }; /* DSA_NOTIFIER_FDB_* */
diff --git a/net/dsa/port.c b/net/dsa/port.c
index b2e66994f72c..b1113788bf9b 100644
--- a/net/dsa/port.c
+++ b/net/dsa/port.c@@ -270,37 +270,6 @@ static void dsa_port_switchdev_unsync_attrs(struct dsa_port *dp) */ } -static void dsa_port_bridge_tx_fwd_unoffload(struct dsa_port *dp, - struct dsa_bridge bridge) -{ - struct dsa_switch *ds = dp->ds; - - /* No bridge TX forwarding offload => do nothing */ - if (!ds->ops->port_bridge_tx_fwd_unoffload || !bridge.num) - return; - - /* Notify the chips only once the offload has been deactivated, so - * that they can update their configuration accordingly. - */ - ds->ops->port_bridge_tx_fwd_unoffload(ds, dp->index, bridge); -} - -static bool dsa_port_bridge_tx_fwd_offload(struct dsa_port *dp, - struct dsa_bridge bridge) -{ - struct dsa_switch *ds = dp->ds; - int err; - - /* FDB isolation is required for TX forwarding offload */ - if (!ds->ops->port_bridge_tx_fwd_offload || !bridge.num) - return false; - - /* Notify the driver */ - err = ds->ops->port_bridge_tx_fwd_offload(ds, dp->index, bridge); - - return err ? false : true; -} - static int dsa_port_bridge_create(struct dsa_port *dp, struct net_device *br, struct netlink_ext_ack *extack)
@@ -361,7 +330,6 @@ int dsa_port_bridge_join(struct dsa_port *dp, struct net_device *br, }; struct net_device *dev = dp->slave; struct net_device *brport_dev; - bool tx_fwd_offload; int err; /* Here the interface is already bridged. Reflect the current
@@ -378,12 +346,13 @@ int dsa_port_bridge_join(struct dsa_port *dp, struct net_device *br, if (err) goto out_rollback; - tx_fwd_offload = dsa_port_bridge_tx_fwd_offload(dp, info.bridge); + /* Drivers which support bridge TX forwarding should set this */ + dp->bridge->tx_fwd_offload = info.tx_fwd_offload; err = switchdev_bridge_port_offload(brport_dev, dev, dp, &dsa_slave_switchdev_notifier, &dsa_slave_switchdev_blocking_notifier, - tx_fwd_offload, extack); + dp->bridge->tx_fwd_offload, extack); if (err) goto out_rollback_unbridge;
@@ -434,8 +403,6 @@ void dsa_port_bridge_leave(struct dsa_port *dp, struct net_device *br) */ dsa_port_bridge_destroy(dp, br); - dsa_port_bridge_tx_fwd_unoffload(dp, info.bridge); - err = dsa_broadcast(DSA_NOTIFIER_BRIDGE_LEAVE, &info); if (err) dev_err(dp->ds->dev,
diff --git a/net/dsa/switch.c b/net/dsa/switch.c
index cd0630dd5417..9c92edd96961 100644
--- a/net/dsa/switch.c
+++ b/net/dsa/switch.c@@ -95,7 +95,8 @@ static int dsa_switch_bridge_join(struct dsa_switch *ds, if (!ds->ops->port_bridge_join) return -EOPNOTSUPP; - err = ds->ops->port_bridge_join(ds, info->port, info->bridge); + err = ds->ops->port_bridge_join(ds, info->port, info->bridge, + &info->tx_fwd_offload); if (err) return err; }
--
2.25.1