diff options
| -rw-r--r-- | drivers/net/dsa/mv88e6xxx/chip.c | 4 | ||||
| -rw-r--r-- | drivers/net/dsa/sja1105/sja1105_main.c | 2 | ||||
| -rw-r--r-- | include/net/dsa.h | 10 | ||||
| -rw-r--r-- | net/dsa/dsa2.c | 4 | ||||
| -rw-r--r-- | net/dsa/port.c | 81 |
5 files changed, 66 insertions, 35 deletions
diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c index de3401b2c86c..a818df35b239 100644 --- a/drivers/net/dsa/mv88e6xxx/chip.c +++ b/drivers/net/dsa/mv88e6xxx/chip.c @@ -3186,8 +3186,8 @@ static int mv88e6xxx_setup(struct dsa_switch *ds) * time. */ if (mv88e6xxx_has_pvt(chip)) - ds->num_fwd_offloading_bridges = MV88E6XXX_MAX_PVT_SWITCHES - - ds->dst->last_switch - 1; + ds->max_num_bridges = MV88E6XXX_MAX_PVT_SWITCHES - + ds->dst->last_switch - 1; mv88e6xxx_reg_lock(chip); diff --git a/drivers/net/dsa/sja1105/sja1105_main.c b/drivers/net/dsa/sja1105/sja1105_main.c index c343effe2e96..355b56cf94d8 100644 --- a/drivers/net/dsa/sja1105/sja1105_main.c +++ b/drivers/net/dsa/sja1105/sja1105_main.c @@ -3139,7 +3139,7 @@ static int sja1105_setup(struct dsa_switch *ds) ds->vlan_filtering_is_global = true; ds->untag_bridge_pvid = true; /* tag_8021q has 3 bits for the VBID, and the value 0 is reserved */ - ds->num_fwd_offloading_bridges = 7; + ds->max_num_bridges = 7; /* Advertise the 8 egress queues */ ds->num_tx_queues = SJA1105_NUM_TC; diff --git a/include/net/dsa.h b/include/net/dsa.h index a23cfbaa09d6..00fbd87ae4ff 100644 --- a/include/net/dsa.h +++ b/include/net/dsa.h @@ -413,12 +413,12 @@ struct dsa_switch { */ unsigned int num_lag_ids; - /* Drivers that support bridge forwarding offload should set this to - * the maximum number of bridges spanning the same switch tree (or all - * trees, in the case of cross-tree bridging support) that can be - * offloaded. + /* Drivers that support bridge forwarding offload or FDB isolation + * should set this to the maximum number of bridges spanning the same + * switch tree (or all trees, in the case of cross-tree bridging + * support) that can be offloaded. */ - unsigned int num_fwd_offloading_bridges; + unsigned int max_num_bridges; size_t num_ports; }; diff --git a/net/dsa/dsa2.c b/net/dsa/dsa2.c index 9606e56710a5..4901cdc264ee 100644 --- a/net/dsa/dsa2.c +++ b/net/dsa/dsa2.c @@ -152,7 +152,9 @@ unsigned int dsa_bridge_num_get(const struct net_device *bridge_dev, int max) unsigned int bridge_num = dsa_bridge_num_find(bridge_dev); if (!bridge_num) { - /* First port that offloads TX forwarding for this bridge */ + /* First port that requests FDB isolation or TX forwarding + * offload for this bridge + */ bridge_num = find_next_zero_bit(&dsa_fwd_offloading_bridges, DSA_MAX_NUM_OFFLOADING_BRIDGES, 1); diff --git a/net/dsa/port.c b/net/dsa/port.c index 9a77bd1373e2..199a56faf460 100644 --- a/net/dsa/port.c +++ b/net/dsa/port.c @@ -271,19 +271,15 @@ static void dsa_port_switchdev_unsync_attrs(struct dsa_port *dp) } static void dsa_port_bridge_tx_fwd_unoffload(struct dsa_port *dp, - struct net_device *bridge_dev) + struct net_device *bridge_dev, + unsigned int bridge_num) { - unsigned int bridge_num = dp->bridge_num; struct dsa_switch *ds = dp->ds; /* No bridge TX forwarding offload => do nothing */ - if (!ds->ops->port_bridge_tx_fwd_unoffload || !dp->bridge_num) + if (!ds->ops->port_bridge_tx_fwd_unoffload || !bridge_num) return; - dp->bridge_num = 0; - - dsa_bridge_num_put(bridge_dev, bridge_num); - /* Notify the chips only once the offload has been deactivated, so * that they can update their configuration accordingly. */ @@ -292,31 +288,60 @@ static void dsa_port_bridge_tx_fwd_unoffload(struct dsa_port *dp, } static bool dsa_port_bridge_tx_fwd_offload(struct dsa_port *dp, - struct net_device *bridge_dev) + struct net_device *bridge_dev, + unsigned int bridge_num) { struct dsa_switch *ds = dp->ds; - unsigned int bridge_num; int err; - if (!ds->ops->port_bridge_tx_fwd_offload) - return false; - - bridge_num = dsa_bridge_num_get(bridge_dev, - ds->num_fwd_offloading_bridges); - if (!bridge_num) + /* FDB isolation is required for TX forwarding offload */ + if (!ds->ops->port_bridge_tx_fwd_offload || !bridge_num) return false; - dp->bridge_num = bridge_num; - /* Notify the driver */ err = ds->ops->port_bridge_tx_fwd_offload(ds, dp->index, bridge_dev, bridge_num); - if (err) { - dsa_port_bridge_tx_fwd_unoffload(dp, bridge_dev); - return false; + + return err ? false : true; +} + +static int dsa_port_bridge_create(struct dsa_port *dp, + struct net_device *br, + struct netlink_ext_ack *extack) +{ + struct dsa_switch *ds = dp->ds; + unsigned int bridge_num; + + dp->bridge_dev = br; + + if (!ds->max_num_bridges) + return 0; + + bridge_num = dsa_bridge_num_get(br, ds->max_num_bridges); + if (!bridge_num) { + NL_SET_ERR_MSG_MOD(extack, + "Range of offloadable bridges exceeded"); + return -EOPNOTSUPP; } - return true; + dp->bridge_num = bridge_num; + + return 0; +} + +static void dsa_port_bridge_destroy(struct dsa_port *dp, + const struct net_device *br) +{ + struct dsa_switch *ds = dp->ds; + + dp->bridge_dev = NULL; + + if (ds->max_num_bridges) { + int bridge_num = dp->bridge_num; + + dp->bridge_num = 0; + dsa_bridge_num_put(br, bridge_num); + } } int dsa_port_bridge_join(struct dsa_port *dp, struct net_device *br, @@ -336,7 +361,9 @@ int dsa_port_bridge_join(struct dsa_port *dp, struct net_device *br, /* Here the interface is already bridged. Reflect the current * configuration so that drivers can program their chips accordingly. */ - dp->bridge_dev = br; + err = dsa_port_bridge_create(dp, br, extack); + if (err) + return err; brport_dev = dsa_port_to_bridge_port(dp); @@ -344,7 +371,8 @@ 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, br); + tx_fwd_offload = dsa_port_bridge_tx_fwd_offload(dp, br, + dp->bridge_num); err = switchdev_bridge_port_offload(brport_dev, dev, dp, &dsa_slave_switchdev_notifier, @@ -366,7 +394,7 @@ out_rollback_unoffload: out_rollback_unbridge: dsa_broadcast(DSA_NOTIFIER_BRIDGE_LEAVE, &info); out_rollback: - dp->bridge_dev = NULL; + dsa_port_bridge_destroy(dp, br); return err; } @@ -393,14 +421,15 @@ void dsa_port_bridge_leave(struct dsa_port *dp, struct net_device *br) .port = dp->index, .br = br, }; + int bridge_num = dp->bridge_num; int err; /* Here the port is already unbridged. Reflect the current configuration * so that drivers can program their chips accordingly. */ - dp->bridge_dev = NULL; + dsa_port_bridge_destroy(dp, br); - dsa_port_bridge_tx_fwd_unoffload(dp, br); + dsa_port_bridge_tx_fwd_unoffload(dp, br, bridge_num); err = dsa_broadcast(DSA_NOTIFIER_BRIDGE_LEAVE, &info); if (err) |